Lennox EL195UH Installation Instructions PDF
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Summary of Content for Lennox EL195UH Installation Instructions PDF
Page 1
03/11
50659601
2011 Lennox Industries Inc.
Dallas, Texas, USA
AIR FLOW
UPFLOW
A IR
F L
O W
A IR
F L
O W
HORIZONTAL RIGHTHORIZONTAL LEFT
INSTALLATION INSTRUCTIONS EL195UH ELITE SERIES GAS FURNACE UPFLOW / HORIZONTAL AIR DISCHARGE
50659601 03/2011 Supersedes 02/2011
THIS MANUAL MUST BE LEFT WITH THE HOMEOWNER FOR FUTURE REFERENCE
This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to the potential for personal injury or death.
CAUTION As with any mechanical equipment, personal injury can result from contact with sharp sheet metal edges. Be careful when you handle this equipment.
WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, person- al injury or loss of life. Installation and service must be performed by a licensed professional installer (or equivalent), service agency or the gas supplier.
Table of Contents Unit Dimensions 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
EL195UH Parts Arrangement 3. . . . . . . . . . . . . . . . . . . . .
EL195UH Gas Furnace 4. . . . . . . . . . . . . . . . . . . . . . . . . .
Shipping and Packing List 4. . . . . . . . . . . . . . . . . . . . . . . .
Safety Information 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Use of Furnace as a Construction Heater 5. . . . . . . . . . .
General 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Combustion, Dilution, Ventilation Air 6. . . . . . . . . . . . . . .
Setting Equipment 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Filters 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Duct System 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pipe and Fittings Specifications 13. . . . . . . . . . . . . . . . . . . Joint Cementing Procedure 15. . . . . . . . . . . . . . . . . . . . . . .
Venting Practices 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Vent Piping Guidelines 17. . . . . . . . . . . . . . . . . . . . . . . . . . . Gas Piping 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electrical 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Unit Start Up 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Gas Pressure Measurement 42. . . . . . . . . . . . . . . . . . . . . . Proper Combustion 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . High Altitude 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Other Unit Adjustments 44. . . . . . . . . . . . . . . . . . . . . . . . . . Blower Motor Performance 45. . . . . . . . . . . . . . . . . . . . . . . Service 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Planned Service 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Integrated Control Diagnostic Codes 49. . . . . . . . . . . . . . . Troubleshooting 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Repair Parts List 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Start Up Checklist 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Litho U.S.A.
Page 2
EL195UH Unit Dimensions inches (mm)
11/2 (38)
9/16 (14)
AIR FLOW
mm in.
EL195UH090P36C
EL195UH070P48B EL195UH070P36B EL195UH045P36B
69/16 (167) Left
9 (229) Right
23 (584)
(19) 3/4
(19) 1Bottom Return
Air Opening
GAS PIPING INLET (Either Side)
Side Return Air Opening (Either Side)
1Bottom Return Air Opening
EXHAUST AIR OUTLET
ELECTRICAL INLET
(Either Side)
SUPPLY AIR OPENING
FRONT VIEW SIDE VIEW
TOP VIEW
A
B 9/16 (14)
C3/4
273/4 (705)
197/16 (494)
231/2 (597)
61/2 (165) (Either Side)
33 (838)
31/4 (83)
115/16 (49)
14 (356)
125/8 (321) (Either Side)
2 OPTIONAL SIDE RETURN
AIR FILTER KIT (Either Side)
16 (406)
143/4 (375)
2OPTIONAL SIDE RETURN
AIR FILTER KIT (Either Side)
EL195UH090P60C
A B C D Model No.
in. mm in. mm in. mm
EL195UH045P24B
171/2 446 163/8 416 16 406 75/8 194
EL195UH090P48C 21 533 197/8 505 191/2 495 93/8 238
EL195UH110P48C EL195UH110P60C
EL195UH135P60D 241/2 622 233/8 594 23 584 111/8 283
5/8 (16)
1
31/4 (83)
233/4 (603)
25 (635)
D
11/2 (38) Front Panel
COMBUSTION AIR INTAKE
2 (51) (Either Side)
17/8 (48)
CONDENSATE TRAP CONNECTION (Either Side)
2 Optional External Side Return Air Filter Kit is not for use with the optional Return Air Base.
1. Single side return air with transition, to accommodate 20 x 25 x 1 in. (508 x 635 x 25 mm) cleanable air filter. Required to maintain proper air velocity.
2. Single side return air with optional Return Air Base 3. Bottom return air. 4. Return air from both sides. 5. Bottom and one side return air. See Blower Performancetables for additional information.
1NOTE 60C size units that require air volumes 1800 cfm or over (850 L/s) must have one of the following
Page 3
EL195UH Parts Arrangement
EL195UH PARTS IDENTIFICATION
FIGURE 1
TOP CAP
BURNER BOX ASSEMBLY
DuralokPlusTM
HEAT EXCHANGER ASSEMBLY
CONTROL BOX (includes integrated ignition control, transformer and interlock switch)
COMBUSTION AIR INDUCER
OUTER ACCESS PANEL
COMBUSTION AIR PRESSURE
SWITCH
PRIMARY LIMIT
GAS VALVE
BLOWER ASSEMBLY
FLEXIBLE NOHUB EXHAUST COLLAR
COLD END HEADER BOX
BAG ASSEMBLIES (shipping location)
Page 4
EL195UH Gas Furnace
The EL195UH Category IV gas furnace is shipped ready
for installation in the upflow or horizontal position. The fur-
nace is shipped with the bottom panel in place. The bot-
tom panel must be removed if the unit is to be installed in
horizontal or upflow applications with bottom return air.
The EL195UH can be installed as either a Direct Vent or
a NonDirect Vent gas central furnace.
The furnace is equipped for installation in natural gas ap-
plications. A conversion kit (ordered separately) is re-
quired for use in propane/LP gas applications.
NOTE In Direct Vent installations, combustion air is taken
from outdoors and flue gases are discharged outdoors. In
NonDirect Vent installations, combustion air is taken from
indoors and flue gases are discharged outdoors. See figure
2 for applications involving roof termination.
FIGURE 2
DIRECT VENT INSTALLATION NONDIRECT VENT INSTALLATION
EXHAUST OUTLET
EL195UH
COMBUSTION AIR INTAKE INSIDE
OF HOUSE
EXHAUST OUTLETCOMBUSTION
AIR INTAKE OUTSIDE OF HOUSE
EL195UH
Shipping and Packing List
Package 1 of 1 contains
1 Assembled EL195UH unit
1 Bag assembly containing the following:
3 Wire nuts
1 Snap bushing
1 Snap plug
1 Wire tie
1 Condensate trap
1 Condensate trap cap
1 Condensate trap clamp
1 2" diameter debris screen
Check equipment for shipping damage. If you find any
damage, immediately contact the last carrier.
The following items may also be ordered separately:
1 Thermostat
1 LP/Propane changeover kit
1 Return air base kit
1 Horizontal suspension kit
1 High altitude pressure switch
Safety Information
WARNING Improper installation, adjustment, alteration, service or maintenance can cause property damage, personal injury or loss of life. Installation and service must be performed by a licensed professional in- staller (or equivalent), service agency or the gas sup- plier.
CAUTION As with any mechanical equipment, personal injury can result from contact with sharp sheet metal edges. Be careful when you handle this equipment.
DANGER Danger of explosion.
There are circumstances in which odorant used with LP/propane gas can lose its scent. In case of a leak, LP/propane gas will settle close to the floor and may be difficult to smell. An LP/propane leak detector should be installed in all LP applications.
Use only the type of gas approved for use with this furnace.
Refer to unit nameplate.
EL195UH units are CSA International certified to ANSI
Z21.47 and CSA 2.3 standards.
Building Codes
In the USA, installation of gas furnaces must conform with lo-
cal building codes. In the absence of local codes, units must
be installed according to the current National Fuel Gas Code
(ANSI-Z223.1/NFPA 54). The National Fuel Gas Code is
available from the following address:
American National Standards Institute, Inc.
11 West 42nd Street
New York, NY 10036
In Canada, installation must conform with current National
Standard of Canada CSA-B149 Natural Gas and Propane
Installation Codes, local plumbing or waste water codes
and other applicable local codes.
In order to ensure proper unit operation in nondirect vent
applications, combustion and ventilation air supply must be
provided according to the current National Fuel Gas Code
or CSA-B149 standard.
Page 5
Installation Locations
This furnace is CSA International certified for installation
clearances to combustible material as listed on the unit
nameplate and in the table in figure 10. Accessibility and ser-
vice clearances must take precedence over fire protection
clearances.
NOTE For installation on combustible floors, the furnace
shall not be installed directly on carpeting, tile, or other
combustible material other than wood flooring.
For installation in a residential garage, the furnace must
be installed so that the burner(s) and the ignition source
are located no less than 18 inches (457 mm) above the
floor. The furnace must be located or protected to avoid
physical damage by vehicles. When a furnace is installed
in a public garage, hangar, or other building that has a haz-
ardous atmosphere, the furnace must be installed accord-
ing to recommended good practice requirements and cur-
rent National Fuel Gas Code or CSA B149 standards.
NOTE Furnace must be adjusted to obtain a temperature
rise within the range specified on the unit nameplate. Failure
to do so may cause erratic limit operation and premature heat
exchanger failure.
This EL195UH furnace must be installed so that its electri-
cal components are protected from water.
Installed in Combination with a Cooling Coil
When this furnace is used with cooling coils (figure 3), it shall
be installed in parallel with, or on the upstream side of, cool-
ing coils to avoid condensation in the heating compartment.
With a parallel flow arrangement, a damper (or other means
to control the flow of air) must adequately prevent chilled air
from entering the furnace. If the damper is manually oper-
ated, it must be equipped to prevent operation of either the
heating or the cooling unit, unless it is in the full HEAT or
COOL setting.
When installed, this furnace must be electrically grounded
according to local codes. In addition, in the United States,
installation must conform with the current National Electric
Code, ANSI/NFPA No. 70. The National Electric Code
(ANSI/NFPA No. 70) is available from the following ad-
dress:
National Fire Protection Association
1 Battery March Park
Quincy, MA 02269
In Canada, all electrical wiring and grounding for the unit
must be installed according to the current regulations of the
Canadian Electrical Code Part I (CSA Standard C22.1)
and/or local codes.
FIGURE 3
Gas Unit
Heating Unit Installed Upstream of Cooling Coil
Gas Unit
Dampers (open during heating operation only)
Dampers (open during cooling operation only)
Heating Unit Installed Parallel to Air Handler Unit
Air Handler Unit
Cooling Coil
AIR FLOWAIR FLOW
AIR FLOW AIR FLOW
NOTE This furnace is designed for a minimum continu-
ous return air temperature of 60F (16C) or an intermit-
tent operation down to 55F (13C) dry bulb for cases
where a night setback thermostat is used. Return air tem-
perature must not exceed 85F (29C) dry bulb.
The EL195UH furnace may be installed in alcoves, closets,
attics, basements, garages, crawl spaces and utility rooms
in the upflow or horizontal position.
This furnace design has not been CSA certified for installa-
tion in mobile homes, recreational vehicles, or outdoors.
Use of Furnace as Construction Heater
Lennox does not recommend the use of EL195UH units as
a construction heater during any phase of construction.
Very low return air temperatures, harmful vapors and op-
eration of the unit with clogged or misplaced filters will dam-
age the unit.
EL195UH units may be used for heating of buildings or
structures under construction, if the following conditions
are met:
The vent system must be permanently installed per
these installation instructions.
A room thermostat must control the furnace. The use of
fixed jumpers that will provide continuous heating is not
allowed.
The return air duct must be provided and sealed to the
furnace.
Return air temperature range between 60F (16C) and
80F (27C) must be maintained.
Page 6
Air filters must be installed in the system and must be
maintained during construction.
Air filters must be replaced upon construction comple-
tion.
The input rate and temperature rise must be set per the
furnace rating plate.
One hundred percent (100%) outdoor air must be pro-
vided for combustion air requirements during construc-
tion. Temporary ducting may supply outdoor air to the
furnace. Do not connect duct directly to the furnace.
Size the temporary duct following these instructions in
section for Combustion, Dilution and Ventilation Air in a
confined space with air from outside.
The furnace heat exchanger, components, duct system,
air filters and evaporator coils must be thoroughly
cleaned following final construction cleanup.
All furnace operating conditions (including ignition, in-
put rate, temperature rise and venting) must be verified
according to these installation instructions.
General
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
In addition to the requirements outlined previously, the fol-
lowing general recommendations must be considered
when installing a EL195UH furnace:
Place the furnace as close to the center of the air dis-
tribution system as possible. The furnace should also be
located close to the vent termination point.
When the furnace is installed in nondirect vent applica-
tions, do not install the furnace where drafts might blow
directly into it. This could cause improper combustion
and unsafe operation.
When the furnace is installed in nondirect vent applica-
tions, do not block the furnace combustion air opening
with clothing, boxes, doors, etc. Air is needed for proper
combustion and safe unit operation.
When the furnace is installed in an attic or other insu-
lated space, keep insulation away from the furnace.
When the furnace is installed in an unconditioned
space, consider provisions required to prevent freezing
of condensate drain system.
CAUTION EL195UH unit should not be installed in areas nor- mally subject to freezing temperatures.
WARNING Product contains fiberglass wool.
Disturbing the insulation in this product during installation, maintenance, or repair will expose you to fiberglass wool. Breathing this may cause lung cancer. (Fiberglass wool is known to the State of Cal- ifornia to cause cancer.)
Fiberglass wool may also cause respiratory, skin, and eye irritation.
To reduce exposure to this substance or for further information, consult material safety data sheets available from address shown below, or contact your supervisor.
Lennox Industries Inc. P.O. Box 799900 Dallas, TX 753799900
WARNING Insufficient combustion air can cause headaches, nausea, dizziness or asphyxiation. It will also cause excess water in the heat exchanger resulting in rust- ing and premature heat exchanger failure. Excessive exposure to contaminated combustion air will result in safety and performance related problems. Avoid exposure to the following substances in the com- bustion air supply:
Permanent wave solutions Chlorinated waxes and cleaners Chlorine base swimming pool chemicals Water softening chemicals Deicing salts or chemicals Carbon tetrachloride Halogen type refrigerants Cleaning solvents (such as perchloroethylene) Printing inks, paint removers, varnishes, etc. Hydrochloric acid Cements and glues Antistatic fabric softeners for clothes dryers Masonry acid washing materials
Combustion, Dilution & Ventilation Air
If the EL195UH is installed as a NonDirect Vent Fur-
nace, follow the guidelines in this section.
NOTE In NonDirect Vent installations, combustion air
is taken from indoors and flue gases are discharged out
doors.
In the past, there was no problem in bringing in sufficient
outdoor air for combustion. Infiltration provided all the air
that was needed. In todays homes, tight construction
practices make it necessary to bring in air from outside
for combustion. Take into account that exhaust fans, ap-
pliance vents, chimneys, and fireplaces force additional
air that could be used for combustion out of the house.
Unless outside air is brought into the house for combus-
Page 7
tion, negative pressure (outside pressure is greater than
inside pressure) will build to the point that a downdraft
can occur in the furnace vent pipe or chimney. As a result,
combustion gases enter the living space creating a po-
tentially dangerous situation.
In the absence of local codes concerning air for combus
tion and ventilation, use the guidelines and procedures in
this section to install EL195UH furnaces to ensure effi-
cient and safe operation. You must consider combustion
air needs and requirements for exhaust vents and gas
piping. A portion of this information has been reprinted
with permission from the National Fuel Gas Code (ANSI
Z223.1/NFPA 54). This reprinted material is not the com-
plete and official position of the ANSI on the referenced
subject, which is represented only by the standard in its
entirety.
In Canada, refer to the CSA B149 installation codes.
CAUTION Do not install the furnace in a corrosive or contami- nated atmosphere. Meet all combustion and ventila- tion air requirements, as well as all local codes.
All gas-fired appliances require air for the combustion pro-
cess. If sufficient combustion air is not available, the fur-
nace or other appliance will operate inefficiently and un-
safely. Enough air must be provided to meet the needs of all
fuelburning appliances and appliances such as exhaust
fans which force air out of the house. When fireplaces, ex-
haust fans, or clothes dryers are used at the same time as
the furnace, much more air is required to ensure proper
combustion and to prevent a downdraft. Insufficient air
causes incomplete combustion which can result in carbon
monoxide.
In addition to providing combustion air, fresh outdoor air di-
lutes contaminants in the indoor air. These contaminants
may include bleaches, adhesives, detergents, solvents
and other contaminants which can corrode furnace compo-
nents.
The requirements for providing air for combustion and ven-
tilation depend largely on whether the furnace is installed in
an unconfined or a confined space.
Unconfined Space
An unconfined space is an area such as a basement or
large equipment room with a volume greater than 50 cubic
feet (1.42 m3) per 1,000 Btu (.29 kW) per hour of the com-
bined input rating of all appliances installed in that space.
This space also includes adjacent rooms which are not
separated by a door. Though an area may appear to be un-
confined, it might be necessary to bring in outdoor air for
combustion if the structure does not provide enough air by
infiltration. If the furnace is located in a building of tight
construction with weather stripping and caulking around
the windows and doors, follow the procedures in the Air
from Outside section.
Confined Space
A confined space is an area with a volume less than 50 cubic
feet (1.42 m3) per 1,000 Btu (.29 kW) per hour of the com
bined input rating of all appliances installed in that space. This
definition includes furnace closets or small equipment rooms.
When the furnace is installed so that supply ducts carry air
circulated by the furnace to areas outside the space con-
taining the furnace, the return air must be handled by ducts
which are sealed to the furnace casing and which terminate
outside the space containing the furnace. This is especially
important when the furnace is mounted on a platform in a
confined space such as a closet or small equipment room.
Even a small leak around the base of the unit at the platform
or at the return air duct connection can cause a potentially
dangerous negative pressure condition. Air for combustion
and ventilation can be brought into the confined space ei-
ther from inside the building or from outside.
Air from Inside
If the confined space that houses the furnace adjoins a
space categorized as unconfined, air can be brought in by
providing two permanent openings between the two
spaces. Each opening must have a minimum free area of 1
square inch (645 mm2) per 1,000 Btu (.29 kW) per hour of
total input rating of all gasfired equipment in the confined
space. Each opening must be at least 100 square inches
(64516 mm2). One opening shall be within 12 inches (305
mm) of the top of the enclosure and one opening within 12
inches (305 mm) of the bottom. See figure 4.
FIGURE 4
EQUIPMENT IN CONFINED SPACE ALL AIR FROM INSIDE
OPENINGS (To Adjacent Unconfined
Space)
NOTE Each opening shall have a free area of at least one square inch per 1,000 Btu (645mm2 per .29kW) per hour of the total input rating of all equipment in the enclosure, but not less than 100 square inches (64516mm.2).
ROOF TERMINATED EXHAUST PIPE
SIDE WALL TERMINATED
EXHAUST PIPE (ALTERNATE LOCATION)
EL195UH
Page 8
Air from Outside
If air from outside is brought in for combustion and ventila- tion, the confined space shall be provided with two perma- nent openings. One opening shall be within 12" (305mm) of the top of the enclosure and one within 12" (305mm) of the bottom. These openings must communicate directly or by ducts with the outdoors or spaces (crawl or attic) that freely communicate with the outdoors or indirectly through vertical ducts. Each opening shall have a mini- mum free area of 1 square inch per 4,000 Btu (645mm2
per 1.17kW) per hour of total input rating of all equipment in the enclosure. When communicating with the outdoors through horizontal ducts, each opening shall have a mini- mum free area of 1 square inch per 2,000 Btu (645mm2
per .59kW) per total input rating of all equipment in the en- closure (See figure 5).
FIGURE 5
EQUIPMENT IN CONFINED SPACE ALL AIR FROM OUTSIDE (Inlet Air from Crawl Space and Outlet Air to Ventilated Attic)
NOTEThe inlet and outlet air openings shall each have a free area of at least one square inch per 4,000 Btu (645mm2 per 1.17kW) per hour of the total input rating of all equipment in the enclosure.
OUTLET AIR
INLET AIR
VENTILATION LOUVERS
(For unheated crawl space)
FURNACE
ROOF TERMINATED EXHAUST PIPE
VENTILATION LOUVERS (Each end of attic)
SIDE WALL TERMINATED
EXHAUST PIPE (ALTERNATE LOCATION)
If air from outside is brought in for combustion and ventila- tion, the confined space must have two permanent open- ings. One opening shall be within 12 inches (305 mm) of the top of the enclosure and one opening within 12 inches (305 mm) of the bottom. These openings must communi- cate directly or by ducts with the outdoors or spaces (crawl or attic) that freely communicate with the outdoors or indi- rectly through vertical ducts. Each opening shall have a minimum free area of 1 square inch (645 mm2) per 4,000 Btu (1.17 kW) per hour of total input rating of all equipment in the enclosure. See figures 5 and 6. When communicat- ing with the outdoors through horizontal ducts, each open- ing shall have a minimum free area of 1 square inch (645 mm2) per 2,000 Btu (.56 kW) per total input rating of all equipment in the enclosure. See figure 7.
When ducts are used, they shall be of the same crosssec- tional area as the free area of the openings to which they connect. The minimum dimension of rectangular air ducts shall be no less than 3 inches (75 mm). In calculating free area, the blocking effect of louvers, grilles, or screens must be considered. If the design and free area of protec- tive covering is not known for calculating the size opening required, it may be assumed that wood louvers will have 20 to 25 percent free area and metal louvers and grilles will have 60 to 75 percent free area. Louvers and grilles must be fixed in the open position or interlocked with the equipment so that they are opened automatically during equipment operation.
FIGURE 6
EQUIPMENT IN CONFINED SPACE ALL AIR FROM OUTSIDE (All Air Through Ventilated Attic)
NOTEThe inlet and outlet air openings shall each have a free area of at least one square inch per 4,000 Btu (645mm2 per 1.17kW) per hour of the total input rating of all equipment in the enclosure.
OUTLET AIR
VENTILATION LOUVERS (Each end of attic)
INLET AIR (Ends 12" above
bottom)
ROOF TERMINATED EXHAUST PIPE
SIDE WALL TERMINATED
EXHAUST PIPE (ALTERNATE LOCATION)
FURNACE
FIGURE 7
EQUIPMENT IN CONFINED SPACE ALL AIR FROM OUTSIDE
OUTLET AIR
INLET AIR
NOTEEach air duct opening shall have a free area of at least one square inch per 2,000 Btu (645mm2 per .59kW) per hour of the total input rating of all equipment in the enclosure. If the equipment room is located against an outside wall and the air openings communi- cate directly with the outdoors, each opening shall have a free area of at least 1 square inch per 4,000 Btu (645mm2 per 1.17kW) per hour of the total input rating of all other equipment in the enclosure.
ROOF TERMINATED EXHAUST PIPE
SIDE WALL TERMINATED
EXHAUST PIPE (ALTERNATE LOCATION)
FURNACE
Page 9
Shipping Bolt Removal
Units with 1/2 hp blower motor are equipped with three flex-
ible legs and one rigid leg. The rigid leg is equipped with a
shipping bolt and a flat white plastic washer (rather than the
rubber mounting grommet used with a flexible mounting
leg). See figure 8. The bolt and washer must be removed
before the furnace is placed into operation. After the
bolt and washer have been removed, the rigid leg will not
touch the blower housing.
FIGURE 8
RIGID LEG (Remove shipping bolt
and washer)
EL195UH090P48C EL195UH110P48C
with 1/2 HP Blower Motor
Installation Setting Equipment
WARNING Do not connect the return air duct to the back of the furnace. Doing so will adversely affect the operation of the safety control devices, which could result in personal injury or death.
WARNING Blower access panel must be securely in place when blower and burners are operating. Gas fumes, which could contain carbon monoxide, can be drawn into living space resulting in personal injury or death.
Upflow Applications
The EL195UH gas furnace can be installed as shipped
in the upflow position. Refer to figure 10 for clearances.
Select a location that allows for the required clearances
that are listed on the unit nameplate. Also consider gas
supply connections, electrical supply, vent connection,
condensate trap and drain connections, and installation
and service clearances [24 inches (610 mm) at unit
front]. The unit must be level from side to side. The unit
may be positioned from level to " toward the front. See
figure 9.
Allow for clearances to combustible materials as indicated
on the unit nameplate.
FIGURE 9
SETTING EQUIPMENT
UPFLOW APPLICATION
HORIZONTAL APPLICATION
FRONT VIEW SIDE VIEW
FRONT VIEW END VIEW
UNIT FRONT
AIR FLOW
UNIT FRONT
1/2" max.
1/2" max.
AIR FLOW
AIR FLOW
SIDE VIEW
UNIT FRONT
Unit must be level sidetoside. Unit may be positioned from level to 1/2" toward the front to aid in draining.
Page 10
WARNING Improper installation of the furnace can result in per- sonal injury or death. Combustion and flue products must never be allowed to enter the return air system or air in the living space. Use sheet metal screws and joint tape to seal return air system to furnace. In platform installations with furnace return, the fur- nace should be sealed airtight to the return air ple- num. A door must never be used as a portion of the return air duct system. The base must provide a stable support and an airtight seal to the furnace. Al- low absolutely no sagging, cracks, gaps, etc. For no reason should return and supply air duct sys- tems ever be connected to or from other heating de- vices such as a fireplace or stove, etc. Fire, explo- sion, carbon monoxide poisoning, personal injury and/or property damage could result.
Installation Clearances
Top
Bottom (Floor)
Left Side Right Side
Top/Plenum 1 in. (25 mm)
*Front 0
Back 0
Sides 0
Vent 0
Floor 0
*Front clearance in alcove installation must be 24 in. (610 mm). Maintain a minimum of 24 in. (610 mm) for front service access. Allow proper clearances to accommodate condensate trap. For installations on a combustible floor, do not install the furnace directly on carpeting, tile or other combustible materials other than wood flooring.
FIGURE 10
Return Air Guidelines
Return air can be brought in through the bottom or either
side of the furnace installed in an upflow application. If the
furnace is installed on a platform with bottom return, make
an airtight seal between the bottom of the furnace and the
platform to ensure that the furnace operates properly and
safely. The furnace is equipped with a removable bottom
panel to facilitate installation.
Markings are provided on both sides of the furnace cabinet
for installations that require side return air. Cut the furnace
cabinet at the maximum dimensions shown on page 2.
Refer to Engineering Handbook for additional information.
EL195UH applications which include side return air
and a condensate trap installed on the same side of the
cabinet (trap can be installed remotely within 5 ft.) re-
quire either a return air base or fieldfabricated transi-
tion to accommodate an optional IAQ accessory taller
than 14.5". See figure 11.
Side Return Air (with transition and filter)
FIGURE 11
Return
Air
Plenum
Transition
20" X 25" X 1"
(508mm X635mm X 25mm)
Air Filter11/2 in.
Page 11
FIGURE 12
Optional Return Air Base (Upflow Applications Only)
NOTE Optional side return air filter kits are not for use with return air base. 1 Both the unit return air opening and the base return air opening must be covered by a single plenum or IAQ cabinet.
Minimum unit side return air opening dimensions for units requiring 1800 cfm of air and over (W x H): 23 x 11 in. (584 x 279 mm). The opening can be cut as needed to accommodate plenum or IAQ cabinet while maintaining dimensions shown. Side return air openings must be cut in the field. There are cutting guides stenciled on the cabinet for the side return air opening. The size of the opening must not extend beyond the markings on the furnace cabinet.
2 To minimize pressure drop, the largest opening height possible (up to 14 inches) is preferred.
FRONT VIEW
1 Unit side return air Opening
SIDE VIEW
31/4 (83)
1 23 (584) Overall
(Maximum)
(584) 23
3/4 (19)
1 227/16 (570)
Overall (Maximum)
SIDE RETURN AIR OPENINGS
(Either Side)
55/8 (143)
1 Minimum 11 (279)
2 Maximum 14 (356)
(683) 267/8
71/4 (184)
FURNACE FRONT
AIR FLOW
IF BASE IS USED
WITHOUT IAQ CABINET,
A SINGLE RETURN AIR
PLENUM MUST
COVER BOTH UNIT AND RETURN AIR BASE
OPENINGS
INDOOR AIR QUALITY CABINET
(PCO, Filter Cabinet, etc.)
AIR BASE
OPTIONAL RETURN171/2 (446) B Width (50W98)
21 (533) C Width (50W99) 241/2 (622) D Width (51W00)
Removing the Bottom Panel
FIGURE 13
Screw
Bottom Panel
Bottom Cap
Removing the Bottom Panel
Remove the two screws that secure the bottom cap to the
furnace. Pivot the bottom cap down to release the bottom
panel. Once the bottom panel has been removed, reinstall
the bottom cap. See figure 13.
Horizontal Applications
FIGURE 14
Front Back
WARNING Do not install the furnace on its front or back. See figure 14.
Page 12
The EL195UH furnace can be installed in horizontal ap-
plications with either right or lefthand air discharge.
Refer to figure 15 for clearances in horizontal applications.
Horizontal Application Installation Clearances
Left End Right End
RightHand Discharge
LeftHand Discharge
Top
Bottom (Floor)**
Bottom (Floor)**
Left End Right End
Air Flow
Air Flow
Air Flow
Air Flow
Top 0
Front* 0
Back 0
Ends 0
Vent 0
Floor 0
*Front clearance in alcove installation must be 24 in. (610 mm). Maintain a minimum of 24 in. (610 mm) for front service access. **An 8" service clearance must be maintained below the unit to provide for servicing of the condensate trap. For installations on a combustible floor, do not install the furnace directly on carpeting, tile or other combustible materials other than wood flooring.
FIGURE 15
Suspended Installation of Horizontal Unit
This furnace may be installed in either an attic or a crawl-
space. Either suspend the furnace from roof rafters or
floor joists, as shown in figure 16, or install the furnace on a
platform, as shown in figure 17. A horizontal suspension
kit (51W10) may be ordered from Lennox or use equiva-
lent.
NOTE Heavygauge sheet metal straps may be used to
suspend the unit from roof rafters or ceiling joists. When
straps are used to suspend the unit in this way, support
must be provided for both the ends. The straps must not
interfere with the plenum or exhaust piping installation.
Cooling coils and supply and return air plenums must
be supported separately.
FIGURE 16
TYPICAL HORIZONTAL APPLICATION
Bracket (typical)
Metal Strap (typical)
Air Flow
Internal Brace (provided with kit)
NOTE When the furnace is installed on a platform or with
the horizontal suspension kit in a crawlspace, it must be
elevated enough to avoid water damage, accommodate
drain trap and to allow the evaporator coil to drain.
Platform Installation of Horizontal Unit
1 Select location for unit keeping in mind service and
other necessary clearances. See figure 15.
2 Construct a raised wooden frame and cover frame
with a plywood sheet. If unit is installed above finished
space, fabricate an auxiliary drain pan to be installed
under unit. Set unit in drain pan as shown in figure 17.
Leave 8 inches for service clearance below unit for
condensate trap.
3 Provide a service platform in front of unit. When instal-
ling the unit in a crawl space, a proper support platform
may be created using cement blocks.
4 Route auxiliary drain line so that water draining from
this outlet will be easily noticed by the homeowner.
Page 13
5 If necessary, run the condensate line into a conden-
sate pump to meet drain line slope requirements. The
pump must be rated for use with condensing furnaces.
Protect the condensate discharge line from the pump
to the outside to avoid freezing.
6 Continue with exhaust, condensate and intake piping
installation according to instructions.
INTAKE PIPE
*GAS
CONNECTOR
SERVICE PLATFORM
*Gas connector may be used for Canadian installation if accept- able by local authority having jurisdiction.
EXHAUST PIPE
FIGURE 17
RAISED
PLATFORM
Return Air Horizontal Applications
Return air may be brought in only through the end of a fur- nace installed in the horizontal position. The furnace is equipped with a removable bottom panel to facilitate installation. See figure 13.
Filters
This unit is not equipped with a filter or rack. A fieldpro-
vided high velocity rated filter is required for the unit to oper-
ate properly. Table 1 lists recommended filter sizes.
A filter must be in place whenever the unit is operating.
TABLE 1
Furnace Cabinet Width
Filter Size
Side Return Bottom Return
171/2" 16 X 25 X 1 (1) 16 X 25 X 1 (1)
21" 16 X 25 X 1 (1) 20 X 25 X 1 (1)
241/2" 16 X 25 X 1 (2) 24 X 25 X 1 (1)
Duct System
Use industry-approved standards to size and install the
supply and return air duct system. Refer to ACCA Manual
D. This will result in a quiet and low-static system that has
uniform air distribution.
NOTE This furnace is not certified for operation in heating
mode (indoor blower operating at selected heating speed)
with an external static pressure which exceeds 0.5 inches
w.c. Operation at these conditions may result in improper
limit operation.
Supply Air Plenum
If the furnace is installed without a cooling coil, a removable
access panel should be installed in the supply air duct. The
access panel should be large enough to permit inspection
of the heat exchanger. The furnace access panel must al-
ways be in place when the furnace is operating and it must
not allow leaks.
Return Air Plenum
NOTE Return air must not be drawn from a room
where this furnace, or any other gasfueled appliance
(i.e., water heater), or carbon monoxideproducing de-
vice (i.e., wood fireplace) is installed.
When return air is drawn from a room, a negative pres-
sure is created in the room. If a gas appliance is operating
in a room with negative pressure, the flue products can
be pulled back down the vent pipe and into the room. This
reverse flow of the flue gas may result in incomplete com-
bustion and the formation of carbon monoxide gas. This
raw gas or toxic fumes might then be distributed through-
out the house by the furnace duct system.
Return air can be brought in through the bottom or either
side of the furnace. If a furnace with bottom return air is
installed on a platform, make an airtight seal between the
bottom of the furnace and the platform to ensure that the
unit operates properly and safely. Use fiberglass sealing
strips, caulking, or equivalent sealing method between the
plenum and the furnace cabinet to ensure a tight seal. If a
filter is installed, size the return air duct to fit the filter frame.
Pipe & Fittings Specifications
All pipe, fittings, primer and solvent cement must conform
with American National Standard Institute and the Ameri-
can Society for Testing and Materials (ANSI/ASTM) stan-
dards. The solvent shall be free flowing and contain no
lumps, undissolved particles or any foreign matter that ad-
versely affects the joint strength or chemical resistance of
the cement. The cement shall show no gelation, stratifica-
tion, or separation that cannot be removed by stirring. Re-
fer to the table 2 below for approved piping and fitting ma-
terials.
Page 14
CAUTION Solvent cements for plastic pipe are flammable liq- uids and should be kept away from all sources of ignition. Do not use excessive amounts of solvent cement when making joints. Good ventilation should be maintained to reduce fire hazard and to minimize breathing of solvent vapors. Avoid contact of cement with skin and eyes.
TABLE 2 PIPING AND FITTINGS SPECIFICATIONS
Schedule 40 PVC (Pipe) D1785
Schedule 40 PVC (Cellular Core Pipe) F891
Schedule 40 PVC (Fittings) D2466
Schedule 40 CPVC (Pipe) F441
Schedule 40 CPVC (Fittings) F438
SDR21 PVC or SDR26 PVC (Pipe) D2241
SDR21 CPVC or SDR26 CPVC (Pipe) F442
Schedule 40 ABS Cellular Core DWV (Pipe) F628
Schedule 40 ABS (Pipe) D1527
Schedule 40 ABS (Fittings) D2468
ABSDWV (Drain Waste & Vent) (Pipe & Fittings)
D2661
PVCDWV (Drain Waste & Vent) Pipe & Fittings)
D2665
PRIMER & SOLVENT CEMENT ASTM
SPECIFICATION
PVC & CPVC Primer F656
PVC Solvent Cement D2564
CPVC Solvent Cement F493
ABS Solvent Cement D2235
PVC/CPVC/ABS All Purpose Cement For Fittings & Pipe of the same material D2564, D2235, F493
ABS to PVC or CPVC Transition Solvent Cement D3138
CANADA PIPE & FITTING & SOLVENT CEMENT
MARKING
PVC & CPVC Pipe and Fittings
ULCS636PVC & CPVC Solvent Cement
ABS to PVC or CPVC Transition Cement
IMPORTANT EL195UH exhaust and intake connections are made of PVC. Use PVC primer and solvent cement when using PVC vent pipe. When using ABS vent pipe, use transitional solvent cement to make connections to the PVC fittings in the unit.
Use PVC primer and solvent cement or ABS solvent cement
meeting ASTM specifications, refer to Table 2. As an alter-
nate, use all purpose cement, to bond ABS, PVC, or CPVC
pipe when using fittings and pipe made of the same materi-
als. Use transition solvent cement when bonding ABS to ei-
ther PVC or CPVC.
Low temperature solvent cement is recommended during
cooler weather. Metal or plastic strapping may be used for
vent pipe hangers. Uniformly apply a liberal coat of PVC
primer for PVC or use a clean dry cloth for ABS to clean in-
side socket surface of fitting and male end of pipe to depth
of fitting socket.
Canadian Applications Only Pipe, fittings, primer
and solvent cement used to vent (exhaust) this ap-
pliance must be certified to ULC S636 and supplied by a
single manufacturer as part of an approved vent (ex-
haust) system. In addition, the first three feet of vent
pipe from the furnace flue collar must be accessible for
inspection.
Page 15
TABLE 3 OUTDOOR TERMINATION KITS USAGE
EL195 UNIT
VENT PIPE DIA. (in.)
STANDARD CONCENTRIC
Outdoor Exhaust
Accelerator (Dia. X Length)
Outdoor Exhaust
Accelerator (Dia. X Length)
2" Wall Plate Kit
3" Wall Plate Kit
2" Wall Ring Kit
Flush- Mount
Kit
11/2" Concentric
Kit
2" Concentric
Kit
3" Concentric
Kit
11/2" X 12" 2" X 12" 22G44
or 30G28 44J40
or 81J20 15F74 51W11**
71M80 or
44W92
69M29 or
44W92
60L46 or 44W93
045
2 YES YES YES* YES YES YES
21/2 YES YES YES* YES YES YES
3 YES YES YES* YES YES YES
070
2 YES YES YES* YES YES YES
21/2 YES YES YES* YES YES YES
3 YES YES YES* YES YES YES
090
2 YES YES YES YES YES YES
21/2 YES YES YES YES YES YES
3 YES YES YES YES YES YES
110
2 YES YES YES YES YES YES
21/2 YES YES YES YES YES YES
3 YES YES YES YES YES YES
135 3 YES YES YES YES
*Requires fieldprovided and installed 11/2" exhaust accelerator. ** Kit 51W11 is provided with a 11/2" accelerator which must be used for all EL195UH045, 070 and 090 installations.
Termination kits 44W92, 44W93, 30G28 and 81J20 approved for use in Canadian installations to meet CSAB149.
The 44W92 concentric kit is provided with a 11/2" accelerator which must be installed on the exhaust outlet when this kit is used with theEL195UH045P24B and
EL195UH070P36B furnaces.
Joint Cementing Procedure
All cementing of joints should be done according to the
specifications outlined in ASTM D 2855.
DANGER DANGER OF EXPLOSION!
Fumes from PVC glue may ignite during system check. Allow fumes to dissipate for at least 5 minutes before placing unit into operation.
1 Measure and cut vent pipe to desired length.
2 Debur and chamfer end of pipe, removing any ridges or rough edges. If end is not chamfered, edge of pipe may remove cement from fitting socket and result in a leaking joint.
NOTE Check the inside of vent pipe thoroughly for
any obstruction that may alter furnace operation.
3 Clean and dry surfaces to be joined.
4 Test fit joint and mark depth of fitting on outside of pipe.
5 Uniformly apply a liberal coat of PVC primer for PVC or use a clean dry cloth for ABS to clean inside socket surface of fitting and male end of pipe to depth of fitting socket.
NOTE Time is critical at this stage. Do not allow prim- er to dry before applying cement.
6 Promptly apply solvent cement to end of pipe and in- side socket surface of fitting. Cement should be ap- plied lightly but uniformly to inside of socket. Take care to keep excess cement out of socket. Apply sec- ond coat to end of pipe.
7 Immediately after applying last coat of cement to pipe, and while both inside socket surface and end of pipe are wet with cement, forcefully insert end of pipe into socket until it bottoms out. Turn PVC pipe 1/4 turn dur- ing assembly (but not after pipe is fully inserted) to dis- tribute cement evenly. DO NOT turn ABS or cellular core pipe.
Page 16
NOTE Assembly should be completed within 20 sec- onds after last application of cement. Hammer blows should not be used when inserting pipe.
8 After assembly, wipe excess cement from pipe at end
of fitting socket. A properly made joint will show a
bead around its entire perimeter. Any gaps may indi-
cate an improper assembly due to insufficient sol-
vent.
9 Handle joints carefully until completely set.
Venting Practices
FIGURE 18
* See table 2 for allowable pipe.
Piping Suspension Guidelines
NOTE Isolate piping at the point where it exits the outside wall or roof in order to prevent transmission of vibration to the structure.
SCHEDULE 40 PVC 5
all other pipe* 3
Wallinside outside
24" maximum 3/4" minimum
Wall Thickness Guidelines
insulation (if required)
1 In areas where piping penetrates joists or interior
walls, hole must be large enough to allow clearance on
all sides of pipe through center of hole using a hanger.
2 When furnace is installed in a residence where unit is
shut down for an extended period of time, such as a
vacation home, make provisions for draining conden-
sate collection trap and lines.
CHIMNEY OR GAS
VENT (Check sizing
for water heater only)
FURNACE (Replaced by EL195)
WATER HEATER
OPENINGS (To Adjacent
Room)
If an EL195UH furnace replaces a furnace which was commonly vented with another gas appliance, the size of the existing vent pipe for that gas ap- pliance must be checked. Without the heat of the original furnace flue products, the existing vent pipe is probably oversized for the single water heater or other appliance. The vent should be checked for proper draw with the remaining appliance.
FIGURE 19
REPLACING FURNACE THAT WAS PART OF A COMMON
VENT SYSTEM
Exhaust Piping (Figures 22 and 23)
Route piping to outside of structure. Continue with installa-
tion following instructions given in piping termination sec-
tion.
CAUTION Do not discharge exhaust into an existing stack or stack that also serves another gas appliance. If verti- cal discharge through an existing unused stack is re- quired, insert PVC pipe inside the stack until the end is even with the top or outlet end of the metal stack.
CAUTION The exhaust vent pipe operates under positive pres- sure and must be completely sealed to prevent leak- age of combustion products into the living space.
Page 17
Vent Piping Guidelines
The EL195UH can be installed as either a NonDirect Vent or a Direct Vent gas central furnace.
NOTE In Non-Direct Vent installations, combustion air is taken from indoors and flue gases are discharged outdoors. In Direct Vent installations, combustion air is taken from out- doors and flue gases are discharged outdoors.
Intake and exhaust pipe sizing Size pipe according to tables 4 and 5. Table 4 lists the minimum vent pipe lengths permitted. Table 5 lists the maximum pipe lengths per- mitted.
Regardless of the diameter of pipe used, the standard roof and wall terminations described in section Exhaust Piping Terminations should be used. Exhaust vent termination pipe is sized to optimize the velocity of the exhaust gas as it exits the termination. Refer to table 6.
In some applications which permit the use of several differ- ent sizes of vent pipe, a combination vent pipe may be used. Contact Lennox Application Department for assis- tance in sizing vent pipe in these applications.
NOTE The exhaust collar on all models is sized to ac- commodate 2" Schedule 40 vent pipe. In horizontal ap- plications, any transition to exhaust pipe larger than 2" must be made in vertical runs of the pipe. Therefore a 2" elbow must be added before the pipe is transitioned to any size larger than 2". This elbow must be added to the elbow count used to determine acceptable vent lengths. Contact the Application Department for more information concerning sizing of vent systems which include multiple pipe sizes.
FIGURE 20
12" max of straight pipe
Exhaust Pipe
12" Min.
NOTE Exhaust pipe MUST be glued to furnace exhaust fittings.
NOTE All horizontal runs of exhaust pipe must slope back to- ward unit. A minimum of 1/4" (6mm) drop for each 12" (305mm) of horizontal run is mandatory for drainage.
NOTE Exhaust piping should be checked carefully to make sure there are no sags or low spots.
Horizontal Application
TABLE 4 MINIMUM VENT PIPE LENGTHS
EL195UH MODEL
MIN. VENT LENGTH*
045, 070, 090, 110, 135
15 ft. or 5 ft. plus 2 elbows or 10 ft. plus 1 elbow
*Any approved termination may be added to the minimum length listed.
Use the following steps to correctly size vent pipe diameter.
1
2
3
4
5
6
045, 070, 090, 110 or 135 btuh
Which termination? Standard or Concentric? See table 3
Intake or exhaust
Which needs most elbows?
How many?
2", 2 1/2", 3" or 4"
Desired pipe size?
Use table 5 to find max intake or exhaust pipe length.
FIGURE 21
What is the altitude?
7
Furnace capacity?
IMPORTANT Do not use screens or perforated metal in exhaust or intake terminations. Doing so will cause freezeups and may block the terminations.
Page 18
TABLE 5 Maximum Allowable Intake or Exhaust Vent Length in Feet
*Size intake and exhaust pipe length separately. Values in table are for Intake OR Exhaust, not combined total. Both Intake and Exhaust must be same pipe size.
Standard Termination at Elevation 0 4500 ft
Number Of 90 Elbows
Used
2" Pipe 21/2" Pipe 3" Pipe
Model Model Model
045 070 090 110 135 045 070 090 110 135 045 070 090 110 135
1 81 66 44 24
n/a
115 115 93 58
n/a
138 137 118 118 114
2 76 61 39 19 110 110 88 53 133 132 113 113 109
3 71 56 34 14 105 105 83 48 128 127 108 108 104
4 66 51 29
n/a
100 100 78 43 123 122 103 103 99
5 61 46 24 95 95 73 38 118 117 98 98 94
6 56 41 19 90 90 68 33 113 112 93 93 89
7 51 36 14 85 85 63 28 108 107 88 88 84
8 46 31
n/a
80 80 58 23 103 102 83 83 79
9 41 26 75 75 53 18 98 97 78 78 74
10 36 21 70 70 48 13 93 92 73 73 69
Standard Termination Elevation 4500 10,000 ft
Number Of 90 Elbows
Used
2" Pipe 21/2" Pipe 3" Pipe
Model Model Model
045 070 090 110 135 045 070 090 110 135 045 070 090 110 135
1 81 66 44
n/a n/a
115 115 93 58
n/a
138 137 118 118 114
2 76 61 39 110 110 88 53 133 132 113 113 109
3 71 56 34 105 105 83 48 128 127 108 108 104
4 66 51 29 100 100 78 43 123 122 103 103 99
5 61 46 24 95 95 73 38 118 117 98 98 94
6 56 41 19 90 90 68 33 113 112 93 93 89
7 51 36 14 85 85 63 28 108 107 88 88 84
8 46 31
n/a
80 80 58 23 103 102 83 83 79
9 41 26 75 75 53 18 98 97 78 78 74
10 36 21 70 70 48 13 93 92 73 73 69
Page 19
TABLE 5 Continued Maximum Allowable Intake or Exhaust Vent Length in Feet
*Size intake and exhaust pipe length separately. Values in table are for Intake OR Exhaust, not combined total. Both Intake and Exhaust must be same pipe size.
Concentric Termination at Elevation 0 4500 ft
Number Of 90 Elbows
Used
2" Pipe 21/2" Pipe 3" Pipe
Model Model Model
045 070 090 110 135 045 070 090 110 135 045 070 090 110 135
1 73 58 42 22
n/a
105 105 89 54
n/a
121 121 114 114 105
2 68 53 37 17 100 100 84 49 116 116 109 109 100
3 63 48 32 12 95 95 79 44 111 111 104 104 95
4 58 43 27
n/a
90 90 74 39 106 106 99 99 90
5 53 38 22 85 85 69 34 101 101 94 94 85
6 48 33 17 80 80 64 29 96 96 89 89 80
7 43 28 12 75 75 59 24 91 91 84 84 75
8 38 23
n/a
70 70 54 19 86 86 79 79 70
9 33 18 65 65 49 14 81 81 74 74 65
10 28 13 60 60 44 n/a 76 76 69 69 60
Concentric Termination Elevation 4501 10,000 ft
Number Of 90 Elbows
Used
2" Pipe 21/2" Pipe 3" Pipe
Model Model Model
045 070 090 110 135 045 070 090 110 135 045 070 090 110 135
1 73 58 42
n/a n/a
105 105 89 54
n/a
121 121 114 114 105
2 68 53 37 100 100 84 49 116 116 109 109 100
3 63 48 32 95 95 79 44 111 111 104 104 95
4 58 43 27 90 90 74 39 106 106 99 99 90
5 53 38 22 85 85 69 34 101 101 94 94 85
6 48 33 17 80 80 64 29 96 96 89 89 80
7 43 28 12 75 75 59 24 91 91 84 84 75
8 38 23
n/a
70 70 54 19 86 86 79 79 70
9 33 18 65 65 49 14 81 81 74 74 65
10 28 13 60 60 44 n/a 76 76 69 69 60
Page 20
FIGURE 22
TYPICAL EXHAUST AND INTAKE PIPE CONNECTIONS IN UPFLOW DIRECT OR NONDIRECT VENT APPLICATIONS
TRANSITION
2 2
2
3
2 2
or
DO NOT transition from smaller to larger pipe in horizontal runs
of exhaust pipe.
EXHAUST
*2
* When transitioning up in pipe size, use the shortest length of 2 PVC pipe possible.
INTAKE
2 TRANSITION
3
*2
EXHAUST INTAKE
FIGURE 23
TRANSITION
SIDE VIEW
2 2
2
2or
TYPICAL EXHAUST AND INTAKE PIPE CONNECTIONS IN HORIZONTAL DIRECT OR NONDIRECT VENT APPLICATIONS (RIGHT HAND DISCHARGE SHOWN)
3
2
45 MAX
45 MAX
DO NOT transition from smaller to larger pipe in horizontal runs
of exhaust pipe.
EXHAUST
12" max.
*2"
* When transitioning up in pipe size, use the shortest length of 2 PVC pipe possible.
2
2
2
INTAKE
2or
2
*2
EXHAUST
INTAKE
*2"
3
*2"
*2"
Page 21
Intake Piping
The EL195UH furnace may be installed in either direct
vent or nondirect vent applications. In nondirect vent
applications, when intake air will be drawn into the furnace
from the surrounding space, the indoor air quality must be
considered and guidelines listed in Combustion, Dilution
and Ventilation Air section must be followed.
Follow the next two steps when installing the unit in Direct
Vent applications, where combustion air is taken from
outdoors and flue gases are discharged outdoors. The
provided air intake screen must not be used in direct
vent applications (outdoors).
1 Use transition solvent cement or a sheet metal screw
to secure the intake pipe to the inlet air connector.
2 Route piping to outside of structure. Continue with
installation following instructions given in general
guidelines for piping terminations and intake and ex-
haust piping terminations for direct vent sections. Re-
fer to table 5 for pipe sizes.
FIGURE 24
TYPICAL AIR INTAKE PIPE CONNECTIONS UPFLOW NONDIRECT VENT APPLICATIONS
INTAKE DEBRIS SCREEN (Provided)
NOTE Debris screen and elbow may be rotated, so that screen may be positioned to face forward or to either side.
FIGURE 25
TYPICAL AIR INTAKE PIPE CONNECTIONS HORIZONTAL NONDIRECT VENT APPLICATIONS
(Horizontal RightHand Air Discharge Application Shown)
INTAKE DEBRIS SCREEN (Provided)
OR
NOTE Debris screen may be positioned straight out (preferred) or with an elbow rotated to face down.
coupling
PVC pipe
Follow the next two steps when installing the unit in Non-
Direct Vent applications where combustion air is taken
from indoors and flue gases are discharged outdoors.
1 Use fieldprovided materials and the factoryprovided
air intake screen to route the intake piping as shown in
figure 24 or 25. Maintain a minimum clearance of 3"
(76mm) around the air intake opening. The air intake
opening (with the protective screen) should always be
directed forward or to either side in the upflow position,
and either straight out or downward in the horizontal
position.
The air intake piping must not terminate too close
to the flooring or a platform. Ensure that the intake
air inlet will not be obstructed by loose insulation
or other items that may clog the debris screen.
2 Use a sheet metal screw to secure the intake pipe to
the connector, if desired.
Page 22
General Guidelines for Vent Terminations
In Non-Direct Vent applications, combustion air is taken
from indoors and the flue gases are discharged to the out-
doors. The EL195UH is then classified as a non-direct
vent, Category IV gas furnace.
In Direct Vent applications, combustion air is taken from
outdoors and the flue gases are discharged to the out-
doors. The EL195UH is then classified as a direct vent,
Category IV gas furnace.
In both Non-Direct Vent and Direct Vent applications, the
vent termination is limited by local building codes. In the
absence of local codes, refer to the current National Fuel
Gas Code ANSI Z2231/NFPA 54 in U.S.A., and current
CSAB149 Natural Gas and Propane Installation Codes in
Canada for details.
Position termination according to location given in figure 26
or 27. In addition, position termination so it is free from any
obstructions and 12" above the average snow accumula-
tion.
At vent termination, care must be taken to maintain
protective coatings over building materials (prolonged
exposure to exhaust condensate can destroy protective
coatings). It is recommended that the exhaust outlet not be
located within 6 feet (1.8m) of a condensing unit because
the condensate can damage the painted coating.
NOTE If winter design temperature is below 32F (0C),
exhaust piping should be insulated with 1/2" (13mm), Ar-
maflex or equivalent when run through unheated space.
Do not leave any surface area of exhaust pipe open to out-
side air; exterior exhaust pipe should be insulated with
1/2" (13mm) Armaflex or equivalent. In extreme cold cli-
mate areas, 3/4" (19mm) Armaflex or equivalent may be
necessary. Insulation on outside runs of exhaust pipe
must be painted or wrapped to protect insulation from de-
terioration. Exhaust pipe insulation may not be necessary
in some specific applications.
NOTE During extremely cold temperatures, below
approximately 20F (6.7C), units with long runs of vent
pipe through unconditioned space, even when insulated,
may form ice in the exhaust termination that prevents the
unit from operating properly. Longer run times of at least 5
minutes will alleviate most icing problems. Also, a heating
cable may be installed on exhaust piping and termination
to prevent freezeups. Heating cable installation kit is
available from Lennox. See Condensate Piping section
for part numbers.
IMPORTANT Do not use screens or perforated metal in exhaust terminations. Doing so will cause freezeups and may block the terminations.
IMPORTANT For Canadian Installations Only: In accordance to CSA International B149 installation codes, the minimum allowed distance between the combustion air intake inlet and the exhaust outlet of other appliances shall not be less than 12 inches (305mm).
Page 23
FIGURE 26
VENT TERMINATION CLEARANCES FOR NONDIRECT VENT INSTALLATIONS IN THE USA AND CANADA
K
D
E
L
B
C
F
G
A
B
J A
M
I
H
INSIDE CORNER
DETAIL
VENT TERMINAL AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED
Fixed ClosedOperable
B
Fixed Closed
Operable
B
B
A =
B =
C =
D =
E =
F =
G =
H =
I =
J =
K =
L =
M =
US Installations1 Canadian Installations2
12 inches (305mm) or 12 in. 305mm) above average snow accumulation.
12 inches (305mm) or 12 in. 305mm) above average snow accumulation.
Clearance above grade, veranda, porch, deck or balcony
Clearance to window or door that may be opened 4 feet (1.2 m) below or to side of opening;
1 foot (30 cm) above opening
6 inches (152mm) for appliances <10,000 Btuh (3kw), 12 inches (305mm) for appliances > 10,000 Btuh (3kw) and
<100,000 Btuh (30kw), 36 inches (.9m) for appliances > 100,000 Btuh (30kw)
Clearance to permanently closed window
Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2 feet (mm) from the center line of the terminal
Clearance to unventilated soffit
Clearance to outside corner
Clearance to inside corner
Clearance to each side of center line ex- tended above meter / regulator assembly
Clearance to service regulator vent outlet
Clearance to nonmechanical air supply inlet to building or the com-
bustion air inlet to any other ap- pliance
Clearance to mechanical air sup- ply inlet
Clearance above paved sidewalk or paved driveway located on public property
Clearance under veranda, porch, deck or balcony
* 12"
* Equal to or greater than soffit depth.
*
* 3 feet (.9m)
* 12"
3 feet (.9m) within a height 15 feet (4.5m) above the meter / regulator assembly
3 feet (.9m)
6 inches (152mm) for appliances <10,000 Btuh (3kw), 12 inches (305mm) for appliances > 10,000 Btuh (3kw) and
<100,000 Btuh (30kw), 36 inches (.9m) for appliances > 100,000 Btuh (30kw)
3 feet (.9m) above if within 10 feet (3m) horizontally
6 feet (1.8m)
7 feet (2.1m)
12 inches (305mm)
1 In accordance with the current ANSI Z223.1/NFPA 54 Natural Fuel Gas Code
2 In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code
A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor. Lennox recommends avoiding this location if possible.
4 feet (1.2 m) below or to side of opening; 1 foot (30 cm) above opening
7 feet (2.1m)
* Equal to or greater than soffit depth.
* Equal to or greater than soffit depth. * Equal to or greater than soffit depth.
* No minimum to outside corner * No minimum to outside corner
3 feet (.9m) within a height 15 feet (4.5m) above the meter / regulator assembly
*12 inches (305mm)
* *
*For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1, clearance will be in accordance with local installation codes and the re- quirements of the gas supplier and these installation instructions."
Page 24
FIGURE 27
VENT TERMINATION CLEARANCES FOR DIRECT VENT INSTALLATIONS IN THE USA AND CANADA
K
D
E
L
B
C
F
G
A
B
J A
M
I
H
INSIDE CORNER
DETAIL
VENT TERMINAL AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED
Fixed ClosedOperable
B
Fixed Closed
Operable
B
B
A =
B =
C =
D =
E =
F =
G =
H =
I =
J =
K =
L =
M =
US Installations1 Canadian Installations2
12 inches (305mm) or 12 in. 305mm) above average snow accumulation.
12 inches (305mm) or 12 in. 305mm) above average snow accumulation.
Clearance above grade, veranda, porch, deck or balcony
Clearance to window or door that may be opened
6 inches (152mm) for appliances <10,000 Btuh (3kw), 9 inches (mm) for appliances > 10,000 Btuh (3kw) and <50,000 Btuh
(15 kw), 12 inches (305mm) for ap- pliances > 50,000 Btuh (15kw)
6 inches (152mm) for appliances <10,000 Btuh (3kw), 12 inches (305mm) for appliances > 10,000 Btuh (3kw) and
<100,000 Btuh (30kw), 36 inches (.9m) for appliances > 100,000 Btuh (30kw)
Clearance to permanently closed window
Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2 feet (mm) from the center line of the terminal
Clearance to unventilated soffit
Clearance to outside corner
Clearance to inside corner
Clearance to each side of center line ex- tended above meter / regulator assembly
Clearance to service regulator vent outlet
Clearance to nonmechanical air supply inlet to building or the com-
bustion air inlet to any other ap- pliance
Clearance to mechanical air sup- ply inlet
Clearance above paved sidewalk or paved driveway located on public property
Clearance under veranda, porch, deck or balcony
* 12"
*
*
* 7 feet (2.1m)
3 feet (.9m) within a height 15 feet (4.5m) above the meter / regulator assembly
3 feet (.9m)
6 inches (152mm) for appliances <10,000 Btuh (3kw), 9 inches (mm) for appliances > 10,000 Btuh (3kw) and <50,000 Btuh
(15 kw), 12 inches (305mm) for ap- pliances > 50,000 Btuh (15kw)
6 inches (152mm) for appliances <10,000 Btuh (3kw), 12 inches (305mm) for appliances > 10,000 Btuh (3kw) and
<100,000 Btuh (30kw), 36 inches (.9m) for appliances > 100,000 Btuh (30kw)
3 feet (.9m) above if within 10 feet (3m) horizontally
6 feet (1.8m)
7 feet (2.1m)
12 inches (305mm)
1 In accordance with the current ANSI Z223.1/NFPA 54 Natural Fuel Gas Code
2 In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code *For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1, clear- ance will be in accordance with local installation codes and the requirements of the gas supplier and these installation instructions." A vent shall not terminate directly above a sidewalk or paved driveway that is located
between two single family dwellings and serves both dwellings.
Permitted only if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor. Lennox recommends avoiding this location if possible.
* 12"
* Equal to or greater than soffit depth * Equal to or greater than soffit depth
* Equal to or greater than soffit depth * Equal to or greater than soffit depth
* No minimum to outside corner * No minimum to outside corner
3 feet (.9m) within a height 15 feet (4.5m) above the meter / regulator assembly
3 feet (.9m)
*
*12 inches (305mm)
Page 25
Details of Intake and Exhaust Piping Terminations for
Direct Vent Installations
NOTE In Direct Vent installations, combustion air is tak- en from outdoors and flue gases are discharged to out- doors.
NOTE Flue gas may be slightly acidic and may adversely affect some building materials. If any vent termination is used and the flue gasses may impinge on the building ma- terial, a corrosionresistant shield (minimum 24 inches square) should be used to protect the wall surface. If the optional tee is used, the protective shield is recommended. The shield should be constructed using wood, plastic, sheet metal or other suitable material. All seams, joints, cracks, etc. in the affected area should be sealed using an appropriate sealant. See figure 29.
Intake and exhaust pipes may be routed either horizontally through an outside wall or vertically through the roof. In attic or closet installations, vertical termination through the roof is preferred. Figures 28 through 40 show typical termina- tions.
1 Exhaust and intake exits must be in same pressure zone. Do not exit one through the roof and one on the side. Also, do not exit the intake on one side and the exhaust on another side of the house or structure.
2 Intake and exhaust pipes should be placed as close together as possible at termination end (refer to il- lustrations). Maximum separation is 3" (76mm) on roof terminations and 6" (152mm) on side wall termina- tions.
3 On roof terminations, the intake piping should termi- nate straight down using two 90 elbows (See figure 28).
4 Exhaust piping must terminate straight out or up as shown. A reducer may be required on the exhaust pip- ing at the point where it exits the structure to improve the velocity of exhaust away from the intake piping. See table 6.
FIGURE 28
UNCONDITIONED ATTIC SPACE
1/2" (13mm) FOAM INSULATION IN
UNCONDITIONED SPACE
SIZE TERMINATION PIPE PER TABLE 6.
3"(76mm) MAX.
12" (305mm) ABOVE AVERAGE SNOW ACCUMULATION
3" (76mm) OR 2" (51mm) PVC
PROVIDE SUPPORT FOR INTAKE AND EXHAUST LINES
8" (203mm) MIN
Inches(mm)
DIRECT VENT ROOF TERMINATION KIT (15F75 or 44J41)
TABLE 6 EXHAUST PIPE TERMINATION SIZE REDUCTION
EL195UH MODEL Exhaust Pipe Size
Termination Pipe Size
*045 and 070 2" (51mm), 21/2" (64mm), 3" (76mm)
11/2" (38mm)
*090 2" (51mm) 110 2" (51mm)
135 3" (76mm) 2" (51mm)
*EL195UH045, 070 and 090 units with the flush mount termination must use the 11/2"accelerator supplied with the kit. NOTE Care must be taken to avoid recirculation of ex-
haust back into intake pipe.
5 On fieldsupplied terminations for side wall exit, ex-
haust piping may extend a maximum of 12 inches
(305mm) for 2" PVC and 20 inches (508mm) for 3"
(76mm) PVC beyond the outside wall. Intake piping
should be as short as possible. See figures 30 and 31.
6 On fieldsupplied terminations, a minimum distance
between the end of the exhaust pipe and the end of
the intake pipe without a termination elbow is 8" and a
minimum distance of 6" with a termination elbow. See
figures 30 and 31.
7 If intake and exhaust piping must be run up a side wall
to position above snow accumulation or other ob-
structions, piping must be supported every 24"
(610mm) as shown in figures 30 and 31. In addition,
close coupled wall termination kits must be extended
for use in this application. See figures 38 and 39.
When exhaust and intake piping must be run up an
outside wall, the exhaust piping must be terminated
with pipe sized per table 6.The intake piping may be
equipped with a 90 elbow turndown. Using turndown
will add 5 feet (1.5m) to the equivalent length of the
pipe.
8 A multiple furnace installation may use a group of up to
four terminations assembled together horizontally, as
shown in figure 35.
Page 26
C
A
E
D
B
A
B D
D
B
C
A
C
12"
1
1
2
2
2" (51mm) Vent Pipe
3" (76mm) Vent Pipe
A Clearance above grade or average snow
accumulation
BHorizontal separation between intake and exhaust
CMinimum from end of exhaust to
inlet of intake
DExhaust pipe length
EWall support distance from top of each pipe
(intake/exhaust)
12" (508MM) Min. 12" (508MM) Min.
6" (152MM) Min. 24" (610 MM) Max
9" (227MM) Min.
12" (305MM) Min. 16" (405 MM) Max.
6" (152MM) Max.
6" (152MM) Min. 24" (610 MM) Max
9" (227MM) Min.
12" (305MM) Min. 20" (508MM) Max.
6" (152MM) Max.
TABLE 7
FIGURE 29
1 The exhaust termination tee should be connected to the 2" or 3" PVC flue pipe as shown in the illustration. Do not use an accelerator in applications that include an exhaust termination tee. The accelerator is not required. 2 As required. Flue gas may be acidic and may adversely affect some building materials. If a side wall vent termination is used and flue gases will impinge on the building materials, a corrosionresistant shield (24 inches square) should be used to protect the wall surface. If optional tee is used, the protective shield is recommende- d. The shield should be constructed using wood, sheet metal or other suitable material. All seams, joints, cracks, etc. in affected area, should be sealed using an appropriate sealant. 3Exhaust pipe 45 elbow can be rotated to the side away from the combustion air inlet to direct exhaust away from adjacent property. The exhaust must never be directed toward the combustion air inlet.
NOTE See unit installation instructions for proper exhaust pipe termination size reduction.
Front View of Intake and Exhaust
Intake Exhaust
3Intake
Exhaust
Page 27
FIGURE 30
FIELDSUPPLIED WALL TERMINATION OR (15F74) WALL RING TERMINATION KIT
See venting table 5 for maximum venting lengths with this arrangement.
* Use wall support every 24" (610 mm). Use two wall supports if extension is greater than 24" (610 mm) but less than 48" (1219 mm). NOTE One wall support must be 6" (152 mm) from top of each pipe (intake and exhaust)
2" (51mm) Vent Pipe
3" (76mm) Vent Pipe
AMinimum clearance above grade or average
snow accumulation
BMaximum horizontal separation between intake and exhaust
CMinimum from end of exhaust to
inlet of intake
DMaximum exhaust pipe length
EMaximum wall support distance from top of each
pipe (intake/exhaust)
12" (508MM) 12" (508MM)
6" (152MM) 6" (152MM)
8" (203MM) 8" (203MM)
12" (305MM) 20" (508MM)
6" (152MM) 6" (152MM)
NOTE FIELDPROVIDED REDUCER MAY BE
REQUIRED TO ADAPT LARGER VENT PIPE SIZE
TO TERMINATION
D
B
C
SIZE TERMINATION PER TABLE 6
1/2" (13mm) ARMAFLEX INSULATION IN UN-
CONDITIONED SPACE
STRAIGHT APPPLICATION
B
C A
D
* WALL SUPPORT
1/2" (13mm) ARMAFLEX INSULATION IN UNCONDITIONED SPACE
E
EXTENDED APPLICATION
A
FIGURE 31
FIELDSUPPLIED WALL TERMINATION OR (15F74) WALL RING TERMINATION KIT
With INTAKE ELBOW
See venting table 5 for maximum venting lengths with this arrangement.
* Use wall support every 24" (610 mm). Use two wall supports if extension is greater than 24" (610 mm) but less than 48" (1219 mm). NOTE One wall support must be 6" (152 mm) from top of each pipe (intake and exhaust)
2" (51mm) Vent Pipe
3" (76mm) Vent Pipe
12" (508MM) 12" (508MM)
6" (152MM) 6" (152MM)
6" (152MM)
12" (305MM) 20" (508MM)
6" (152MM) 6" (152MM)
6" (152MM)
AMinimum clearance above grade or average
snow accumulation
BMaximum horizontal separation between intake and exhaust
CMinimum from end of exhaust to
inlet of intake
DMaximum exhaust pipe length
EMaximum wall support distance from top of each
pipe (intake/exhaust)
NOTE FIELDPROVIDED REDUCER MAY BE
REQUIRED TO ADAPT LARGER VENT PIPE SIZE
TO TERMINATION
D
B
C
SIZE TERMINATION PER TABLE 6
1/2" (13mm) ARMAFLEX INSULATION IN UN-
CONDITIONED SPACE
STRAIGHT APPPLICATION
B
C
D
* WALL SUPPORT
1/2" (13mm) ARMAFLEX INSULATION IN UNCONDITIONED SPACE
E
EXTENDED APPLICATION
A
A
Page 28
FIGURE 32
2" EXTENSION FOR 2" PVC PIPE1" EXTENSION FOR 3" PVC PIPE
11/2" ACCELERATOR
(all 45, 070 and 090 units)
FURNACE EXHAUST
PIPE
FURNACE INTAKE
PIPE
4
GLUE EXHAUST END FLUSH INTO
TERMINATION
FLAT SIDE
FLUSHMOUNT SIDE WALL TERMINATION 51W11
FIGURE 33
DIRECT VENT CONCENTRIC ROOFTOP TERMINATION 71M80, 69M29 or 60L46 (US) 44W92 or 44W93 (Canada)
Minimum Above Average
Snow Accumulation
SHEET METAL STRAP (Clamp and sheet metal strap
must be field installed to support the weight of the termination kit.)
FLASHING (Not Furnished)
CLAMP FIELDPROVIDED
REDUCER MAY BE REQUIRED TO ADAPT LARGER VENT
PIPE SIZE TO TERMINATION
1 1/2" (38mm) accelerator provided on 71M80 & 44W92 kits for EL195UH045P24B,
070P24B & 070P36B
12 (305mm) INTAKE AIR
EXHAUST VENT
12" (305mm) Min. above grade or average snow accumulation.
FIGURE 34
DIRECT VENT CONCENTRIC WALL TERMINATION 71M80, 69M29 or 60L46 (US) 44W92 or 44W93 (Canada)
INTAKE AIR
INTAKE AIRINTAKE
AIR
OUTSIDE WALL
GRADE
CLAMP (Not Furnished)
FIELDPROVIDED REDUCER MAY BE REQUIRED
TO ADAPT LARGER VENT PIPE SIZE TO TERMINATION
EXHAUST VENT
11/2" (38mm) accelerator provided on 71M80 & 44W92 kits for EL195UH045P24B,
070P24B & 070P36B
EXHAUST VENT
FIGURE 35
EXHAUST VENT
INTAKE AIR
51/2" (140mm)
Front View
12" (305mm)
5" (127mm)
18" MAX. (457mm)
EXHAUST VENT
INTAKE AIR
OPTIONAL VENT TERMINATION FOR MULTIPLE UNIT INSTALLATION OF DIRECT VENT WALL TERMINATION KIT
(22G44, 44J40, 30G28 or 81J20)
Inches (mm)
Side View
12" (305mm) Min. above grade or average snow accumulation.
optional intake elbow
FIGURE 36
1/2" (13mm) Foam Insulation in Unconditioned Space
EXHAUST VENT
INTAKE AIR
OUTSIDE WALL
EXHAUST VENT
INTAKE AIR
Front View
Top View
DIRECT VENT WALL TERMINATION KIT (30G28 or 81J20)
6 (152mm) MIN.
SIZE TERMINATION
PIPE PER TABLE 6.
FIELD PROVIDED
REDUCER MAY BE REQUIRED
TO ADAPT LARGER VENT PIPE SIZE TO TERMINATION
FIGURE 37
EXHAUST VENT
INTAKE AIR
Front View SIZE
TERMINATION PIPE PER TABLE 6.
Top View1/2" (13mm) Foam Insulation in Unconditioned Space
EXHAUST VENT
INTAKE AIR
OUTSIDE WALL
DIRECT VENT WALL TERMINATION KIT (22G44 or 44J40)
8" (206mm) MIN.
FIELD PROVIDED
REDUCER MAY BE REQUIRED
TO ADAPT LARGER VENT PIPE SIZE TO TERMINATION
Page 29
FIGURE 38
12 (305 mm) Minimum Above Grade or Average
Snow Accumulation
1/2 (13 mm) FOAM INSULATION
(FieldFurnished)
5 (127 mm)
51/2 (140 mm)
EXHAUST AIR
INTAKE AIR
GRADE
12 (305 mm)
INTAKE AIR
EXHAUST AIR
GRADE
12 (305 mm) Max. for 2 (51 mm) Dia. Exhaust 20 (508 mm) Max. for 3 (76 mm) Dia. Exhaust
WALL SUPPORT*
12 (305 mm) Max. for 2 (51 mm) Dia. Exhaust 20 (508 mm) Max. for 3 (76 mm) Dia. Exhaust
12 (305 mm) Minimum Above Grade or Average
Snow Accumulation
WALL TERMINATION KITS (CLOSECOUPLE) EXTENDED VENT FOR GRADE CLEARANCE
2 inch (51 mm) 22G44 (US) 3 inch (76 mm) 44J40 (US)
6 (152 mm) Maximum
8 (203 mm) Min. for 2 (51 mm) & 3 (76 mm) DIA. pipe between the end of the exhaust pipe and intake pipe
8 (203 mm) Min.
*Use wall support every 24" (610). Use two supports if extension is greater than 24" but less than 48".
FIELDPROVIDED REDUCER MAY BE REQUIRED TO ADAPT
LARGER VENT PIPE SIZE TO TERMINATION
If intake and exhaust pipe is less than 12 in. (305 mm) above snow accumulation or other obstructions, field fabricated piping must be installed.
FIGURE 39
12 (305 mm) Minimum Above Grade or Average
Snow Accumulation
1/2 (13 mm) FOAM INSULATION
(FieldFurnished)
5 (127 mm)
51/2 (140 mm)
EXHAUST AIR
INTAKE AIR
GRADE
12 (305 mm)
INTAKE AIR
EXHAUST AIR
GRADE
WALL SUPPORT*
12 (305 mm) Minimum Above Grade or Average
Snow Accumulation
WALL TERMINATION KITS (CLOSECOUPLE) EXTENDED VENT FOR GRADE CLEARANCE
2 inch (51 mm) 30G28 (WTK Canada) 3 inch (76 mm) 81J20 (WTK Canada)
See Installation Instructions for additional information.
6 (152 mm) Maximum
If intake and exhaust pipe is less than 12 in. (305 mm) above snow accumulation or other obstructions, field fabricated piping must be installed.
12 (305 mm) Max. for 2 (51 mm) Dia. Exhaust 20 (508 mm) Max. for 3 (76 mm) Dia. Exhaust
12 (305 mm) Max. for 2 (51 mm) Dia. Exhaust 20 (508 mm) Max. for 3 (76 mm) Dia. Exhaust
6 (152 mm) Minimum
6 (152 mm) Minimum
*Use wall support every 24" (610). Use two supports if extension is greater than 24" but less than 48".
FIELDPROVIDED REDUCER MAY BE REQUIRED TO ADAPT
LARGER VENT PIPE SIZE TO TERMINATION
Page 30
EL195UH DIRECT VENT APPLICATION USING EXISTING CHIMNEY
NOTE Do not discharge exhaust gases directly into any chimney or vent stack. If ver- tical discharge through an existing unused chimney or stack is required, insert piping inside chimney until the pipe open end is above top of chimney and terminate as illus- trated. In any exterior portion of chimney, the exhaust vent must be insulated.
FIGURE 40
3" 8" (76mm 203mm)
STRAIGHTCUT OR ANGLECUT IN DIRECTION
OF ROOF SLOPE *
EXHAUST VENT 1/2" (13mm)
WEATHERPROOF INSULATION
SHOULDER OF FITTINGS PROVIDE SUPPORT
OF PIPE ON TOP PLATE
ALTERNATE INTAKE PIPE
INTAKE PIPE INSULATION (optional)
EXTERIOR PORTION OF
CHIMNEY
INSULATE TO FORM
SEAL
SHEET METAL TOP
PLATE
*SIZE TERMINATION PIPE PER TABLE 6.
Minimum 12" (305MM) above chimney top
plate or average snow accumulation
8" 12" (203mm 305mm)
3"8" (76mm203mm)
Details of Exhaust Piping Terminations for Non-Direct
Vent Applications
Exhaust pipes may be routed either horizontally through an
outside wall or vertically through the roof. In attic or closet
installations, vertical termination through the roof is pre-
ferred. Figures 41 through 44 show typical terminations.
1 Exhaust piping must terminate straight out or up as
shown. The termination pipe must be sized as listed in
table 6.The specified pipe size ensures proper veloc-
ity required to move the exhaust gases away from the
building.
2 On field supplied terminations for side wall exit, ex-
haust piping may extend a maximum of 12 inches
(305mm) for 2" PVC and 20 inches (508mm) for 3"
(76mm) PVC beyond the outside wall. See figure 42.
FIGURE 41
NONDIRECT VENT ROOF TERMINATION KIT (15F75 or 44J41)
UNCONDITIONED ATTIC SPACE
3" (76mm) OR 2" (51mm) PVC
PROVIDE SUPPORT FOR EXHAUST LINES
12" (305mm) ABOVE AVE.
SNOW ACCUMULATION
SIZE TERMINATION PIPE PER TABLE 6.
1/2" (13mm) FOAM INSULATION
FIGURE 42
1/2" (13mm) ARMAFLEX INSULATION IN
UNCONDITIONED SPACE
PVC REDUCER
1/2" (13mm) ARMAFLEX INSULATION
NONDIRECT VENT FIELD SUPPLIED WALL TERMINATION OR (15F74) WALL TERMINATION KIT
SIZE TERMINATION PIPE PER TABLE 6.
FIELDPROVIDED REDUCER MAY
BE REQUIRED TO ADAPT LARGER VENT PIPE SIZE
TO TERMINATION 12" MIN. (305mm)
Above Grade or average snow accumulation
12" (305mm) MAX. for 2" (51mm) 20" (508mm) MAX. for 3" (76mm)
3 If exhaust piping must be run up a side wall to position
above snow accumulation or other obstructions, pip-
ing must be supported every 24 inches (610mm) as
shown in figure 43. When exhaust piping must be run
up an outside wall, any reduction in exhaust pipe size
must be done after the final elbow.
FIGURE 43
12" (305mm) ABOVE GRADE OR AVERAGE SNOW ACCUMULATION
UNCONDITIONED SPACE
1/2" (13mm) FOAM INSULATION
1/2" (13mm) FOAM INSULATION IN
UNCONDITIONED SPACE
*WALL SUPPORT
OUTSIDE WALL
SIZE TER- MINATION PIPE PER TABLE 6.
FIELDPROVIDED REDUCER MAY BE
REQUIRED TO ADAPT LARGER
VENT PIPE SIZE TO TERMINATION
*Use wall support every 24" (610). Use two supports if extension is greater than 24" but less than 48".
12" (305mm) MAX. for 2" (51mm) 20" (508mm) MAX. for 3" (76mm)
NONDIRECT VENT FIELD SUPPLIED WALL TERMINATION EXTENDED OR (15F74) WALL TERMINATION VENT PIPE
EXTENDED
6" (152mm) Max
Page 31
NOTE Do not discharge exhaust gases directly into any chimney or vent stack. If ver- tical discharge through an existing unused chimney or stack is required, insert piping inside chimney until the pipe open end is above top of chimney and terminate as illus- trated. In any exterior portion of chimney, the exhaust vent must be insulated.
FIGURE 44
STRAIGHTCUT OR ANGLECUT IN DIRECTION
OF ROOF SLOPE
EXHAUST VENT 1/2" (13mm)
WEATHERPROOF INSULATION
SHOULDER OF FITTINGS PROVIDE SUPPORT
OF PIPE ON TOP PLATE
EXTERIOR PORTION OF
CHIMNEY
INSULATE TO FORM
SEAL
SHEET METAL TOP
PLATE
SIZE TERMINATION PIPE PER TABLE 6.
EL195UH NONDIRECT VENT APPLICATION USING EXISTING CHIMNEY
Minimum 12" (305MM) above chimney top
plate or average snow accumulation
Condensate Piping
This unit is designed for either right- or left-side exit of con-
densate piping in upflow applications. In horizontal applica-
tions, the condensate trap must extend below the unit. An
8" service clearance is required for the condensate trap.
Refer to figure 45 for condensate trap locations. Figure 49
shows trap assembly using 1/2" PVC or 3/4" PVC.
NOTE If necessary the condensate trap may be installed
up to 5 away from the furnace. Use PVC pipe to connect
trap to furnace condensate outlet. Piping from furnace
must slope down a minimum of 1/4" per ft. toward trap.
1 Determine which side condensate piping will exit the
unit, location of trap, fieldprovided fittings and length of
PVC pipe required to reach available drain.
2 Remove plug (figure 45) from the cold end header box
at the appropriate location on the side of the unit. Install
fieldprovided 1/2 NPT male fitting into cold end head-
er box. Use Teflon tape or appropriate pipe dope.
3 Install the cap over the clean out opening at the base of
the trap. Secure with clamp. See figure 49.
FIGURE 45
CONDENSATE TRAP AND PLUG LOCATIONS (Unit shown in upflow position)
NOTE In upflow applications where side return
air filter is installed on same side as the conden-
sate trap, filter rack must be installed beyond
condensate trap or trap must be relocated to
avoid interference.
Trap (same on right side)
Plug (same on left side)
11/2 in.
4 Install drain trap using appropriate PVC fittings, glue
all joints. Glue the provided drain trap as shown in fig-
ure 49. Route the condensate line to an open drain.
Condensate line must maintain a 1/4" downward slope
from the furnace to the drain.
NOTE Vinyl tubing may be used for condensate drain.
Tubing must be 11/4" OD X 1" ID and should be
attached to the drain on the trap using a hose clamp.
CAUTION Do not use copper tubing or existing copper conden- sate lines for drain line.
5 If unit will be started immediately upon completion of
installation, prime trap per procedure outlined in Unit
StartUp section.
Condensate line must slope downward away from the
trap to drain. If drain level is above condensate trap,
condensate pump must be used. Condensate drain
line should be routed within the conditioned space to
avoid freezing of condensate and blockage of drain
line. If this is not possible, a heat cable kit may be used
Page 32
on the condensate trap and line. Heating cable kit is
available from Lennox in various lengths; 6 ft. (1.8m)
kit no. 26K68; 24 ft. (7.3m) kit no. 26K69; and 50 ft.
(15.2m) kit no. 26K70.
FIGURE 46
CONDENSATE TRAP LOCATIONS (Unit shown in upflow position with remote trap)
*5 max.
To Drain
PVC Pipe Only
Field Provided Vent Min. 1" Above Condensate
Drain Connection
1" Min.
Trap Can Be Installed a Maximum 5 From Furnace
*Piping from furnace must slope down a minimum of 1/4" per ft. toward trap.
CAUTION A separate drain line must be run to the drain from the condensate trap to ensure proper drainage and pressure switch operation. DO NOT connect the condensate trap drain into the drain line from the evaporator coil.
FIGURE 47
EL195UH with Evaporator Coil
Drain
Condensate trap and evaporator coil must
be drained separately as shown.
FieldProvided Vent
FIGURE 48
CONDENSATE TRAP LOCATIONS (Unit shown in horizontal righthand discharge position)
5 max.
to drain
*PVC Pipe Only
41/2" Min.
FieldProvided Vent Must Not Interfere With
Service To The Unit
*Piping from furnace must slope down a minimum of 1/4" per ft. toward trap.
Page 33
FIGURE 49
Adapter 1/2 inch slip X 1/2 inch mpt (Not Furnished)
Drain Trap Assembly
(Furnished)
Vent
Drain Trap Clean Out
5 Feet Maximum
Coupling 1/2 inch slip X slip (Not Furnished)
90 Elbow 1/2 inch PVC (Not Furnished)
1/2 inch PVC Pipe (Not Furnished)
1/2 inch PVC Pipe (Not Furnished)
1 (25) Minimum
Above Top of Condensate Drain Connection In Unit
Condensate Drain Connection In Unit
7 (178)
Drain Trap Assembly (Furnished)
Drain Assembly for 1/2 inch Drain Pipe
90 Elbow 3/4 inch PVC
(Not Furnished)
Coupling 3/4 inch slip X slip (Not Furnished)
To Drain
To Drain
90 Elbow 3/4 inch PVC
(Not Furnished)
To Drain
90 Street Elbow 1/2 inch PVC
To Drain
90 Elbow 1/2 inch PVC
(Not Furnished)
1/2 inch PVC Pipe (Not Furnished)
Drain Assembly for 3/4 inch Drain Pipe
OPTIONAL Drain Piping
OPTIONAL Condensate Drain Connection
90 Street Elbow 1/2 inch PVC
(Not Furnished)
Condensate Drain Connection In Unit
Adapter 1/2 inch slip X 1/2 inch mpt (Not Furnished)
1 inch (25mm) Minimum Above Top of Condensate Drain Connection In Unit
Condensate Drain Connection In Unit
Drain Trap Assembly with 1/2 inch Piping
Vent
To Drain
1 inch (25mm) Minimum Above Top of Condensate Drain Connection In Unit
Condensate Drain Connection In Unit
Drain Trap Assembly with 3/4 inch Piping
Vent
To Drain
TRAP / DRAIN ASSEMBLY USING 1/2" PVC OR 3/4" PVC
(Furnished)
Page 34
Gas Piping
Gas supply piping should not allow more than 0.5"W.C. drop
in pressure between gas meter and unit. Supply gas pipe
must not be smaller than unit gas connection.
CAUTION If a flexible gas connector is required or allowed by the authority that has jurisdiction, black iron pipe shall be installed at the gas valve and extend outside the furnace cabinet. The flexible connector can then be added between the black iron pipe and the gas supply line.
WARNING Do not exceed 600 inlbs (50 ftlbs) torque when at- taching the gas piping to the gas valve.
1 Gas piping may be routed into the unit through either
the left- or right-hand side. Supply piping enters into
the gas valve from the side of the valve as shown in
figure 51. Move Bellows grommet to side which gas
line enters. Ensure opposite gas line hole is plugged
with supplied plug.
2 When connecting gas supply, factors such as length of
run, number of fittings and furnace rating must be con-
sidered to avoid excessive pressure drop. Table 8 lists
recommended pipe sizes for typical applications.
NOTE Use two wrenches when connecting gas pip-
ing to avoid transferring torque to the manifold.
3 Gas piping must not run in or through air ducts, clothes
chutes, chimneys or gas vents, dumb waiters or eleva-
tor shafts. Center gas line through piping hole. Gas
line should not touch side of unit. See figures 51 and
52.
4 Piping should be sloped 1/4 inch per 15 feet (6mm per
5.6m) upward toward the gas meter from the furnace.
The piping must be supported at proper intervals, ev-
ery 8 to 10 feet (2.44 to 3.05m), using suitable hangers
or straps. Install a drip leg in vertical pipe runs to serve as
a trap for sediment or condensate.
5 A 1/8" N.P.T. plugged tap or pressure post is located
on the gas valve to facilitate test gauge connection.
See figure 59.
6 In some localities, codes may require installation of a
manual main shut-off valve and union (furnished by in-
staller) external to the unit. Union must be of the
ground joint type.
IMPORTANT Compounds used on threaded joints of gas piping must be resistant to the actions of liquified petro- leum gases.
Leak Check
After gas piping is completed, carefully check all piping connections (factory and fieldinstalled) for gas leaks. Use a leak detecting solution or other preferred means.
Never use an open flame to test for gas leaks. Check all
connections using a commercially available soap solution
made specifically for leak detection.
The furnace must be isolated from the gas supply system by closing its individual manual shut-off valve during any pressure testing of the gas supply system at pressures greater than or equal to 1/2 psig (3.48 kPa, 14 inches w.c.).
FIGURE 50
MANUAL MAIN SHUTOFF VALVE WILL NOT HOLD
NORMAL TEST PRESSURE
CAP
FURNACE
ISOLATE GAS VALVE1/8" N.P.T.
PLUGGED TAP
IMPORTANT When testing pressure of gas lines, gas valve must be disconnected and isolated. See figure 50. Gas valves can be damaged if subjected to pressures greater than 1/2 psig (3.48 kPa).
WARNING FIRE OR EXPLOSION HAZARD
Failure to follow the safety warnings exactly could result in serious injury, death, or property damage. Never use an open flame to test for gas leaks. Check all connections using a commercially available soap solution made specifically for leak detection. Some soaps used for leak detection are corrosive to certain metals. Carefully rinse piping thoroughly after leak test has been completed.
Page 35
GROUND JOINT UNION
FIELD PROVIDED
AND INSTALLED
Left Side Piping (Standard)
DRIP LEG
MANUAL MAIN SHUTOFF
VALVE
Right Side Piping (Alternate)
NOTE BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET
Bellows Grommet
PlugPlug
GROUND JOINT UNION
DRIP LEG
MANUAL MAIN SHUTOFF
VALVE
Gas Valve Gas Valve
Bellows Grommet
FIGURE 51
Horizontal Applications Possible Gas Piping Configurations
GROUND JOINT UNION
DRIP LEG
MANUAL MAIN SHUTOFF
VALVE
GROUND JOINT UNION
DRIP LEG
MANUAL MAIN SHUTOFF
VALVE
GROUND JOINT UNION
DRIP LEG
MANUAL MAIN SHUTOFF
VALVE Horizontal Application LeftSide Air Discharge
Horizontal Application RightSide Air Discharge
NOTE BLACK IRON PIPE ONLY TO BE ROUTED INSIDE OF CABINET
FIELD PROVIDED
AND INSTALLED
Bellows Grommet
Bellows Grommet
Bellows Grommet
Plug
Gas Valve
Gas Valve
FIGURE 52
Page 36
TABLE 8 GAS PIPE CAPACITY FT3/HR (kL/HR)
Nominal Iron Pipe Size Inches(mm)
Internal Diameter
Inches(mm)
Length of PipeFeet(m)
10 (3.048)
20 (6.096)
30 (9.144)
40 (12.192)
50 (15.240)
60 (18.288)
70 (21.336)
80 (24.384)
90 (27.432)
100 (30.480)
1/2 (12.7)
.622 (17.799)
175 (4.96)
120 (3.40)
97 (2.75)
82 (2.32)
73 (2.07)
66 (1.87)
61 (1.73)
57 (1.61)
53 (1.50)
50 (1.42)
3/4 (19.05)
.824 (20.930)
360 (10.19)
250 (7.08)
200 (5.66)
170 (4.81)
151 (4.28)
138 (3.91)
125 (3.54)
118 (3.34)
110 (3.11)
103 (2.92)
1 (25.4)
1.049 (26.645)
680 (19.25)
465 (13.17)
375 (10.62)
320 (9.06)
285 (8.07)
260 (7.36)
240 (6.80)
220 (6.23)
205 (5.80)
195 (5.52)
11/4 (31.75)
1.380 (35.052)
1400 (39.64)
950 (26.90)
770 (21.80)
660 (18.69)
580 (16.42)
530 (15.01)
490 (13.87)
460 (13.03)
430 (12.18)
400 (11.33)
11/2 (38.1)
1.610 (40.894)
2100 (59.46)
460 (41.34)
1180 (33.41)
990 (28.03)
900 (25.48)
810 (22.94)
750 (21.24)
690 (19.54)
650 (18.41)
620 (17.56)
2 (50.8)
2.067 (52.502)
3950 (111.85)
2750 (77.87)
2200 (62.30)
1900 (53.80)
1680 (47.57)
1520 (43.04)
1400 (39.64)
1300 (36.81)
1220 (34.55)
1150 (32.56)
21/2 (63.5)
2.469 (67.713)
6300 (178.39)
4350 (123.17)
3520 (99.67)
3000 (84.95)
2650 (75.04)
2400 (67.96)
2250 (63.71)
2050 (58.05)
1950 (55.22)
1850 (52.38)
3 (76.2)
3.068 (77.927)
11000 (311.48)
7700 (218.03)
6250 (176.98)
5300 (150.07)
4750 (134.50)
4300 (121.76)
3900 (110.43)
3700 (104.77)
3450 (97.69)
3250 (92.03)
4 (101.6)
4.026 (102.260)
23000 (651.27)
15800 (447.39)
12800 (362.44)
10900 (308.64)
9700 (274.67)
8800 (249.18)
8100 (229.36)
7500 (212.37)
7200 (203.88)
6700 (189.72)
NOTE Capacity given in cubic feet of gas per hour (kilo liters of gas per hour) and based on 0.60 specific gravity gas.
Removal of the Furnace from Common Vent
In the event that an existing furnace is removed from a
venting system commonly run with separate gas ap-
pliances, the venting system is likely to be too large to
properly vent the remaining attached appliances.
Conduct the following test while each appliance is operat-
ing and the other appliances (which are not operating) re-
main connected to the common venting system. If the
venting system has been installed improperly, you must
correct the system as indicated in the general venting re-
quirements section.
WARNING CARBON MONOXIDE POISONING HAZARD
Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon mon- oxide poisoning or death. The following steps shall be followed for each ap- pliance connected to the venting system being placed into operation, while all other appliances connected to the venting system are not in operation:
1 Seal any unused openings in the common venting sys-
tem.
2 Inspect the venting system for proper size and horizontal
pitch. Determine that there is no blockage, restriction,
leakage, corrosion, or other deficiencies which could
cause an unsafe condition.
3 Close all building doors and windows and all doors be-
tween the space in which the appliances remaining
connected to the common venting system are located
and other spaces of the building. Turn on clothes dry-
ers and any appliances not connected to the common
venting system. Turn on any exhaust fans, such as
range hoods and bathroom exhausts, so they will oper-
ate at maximum speed. Do not operate a summer ex-
haust fan. Close fireplace dampers.
4 Follow the lighting instructions. Turn on the appliance
that is being inspected. Adjust the thermostat so that
the appliance operates continuously.
5 After the main burner has operated for 5 minutes, test
for leaks of flue gases at the draft hood relief opening.
Use the flame of a match or candle.
6 After determining that each appliance connected to the
common venting system is venting properly, (step 3)
return all doors, widows, exhaust fans, fireplace damp-
ers, and any other gasburning appliances to their pre-
vious mode of operation.
7 If a venting problem is found during any of the preced-
ing tests, the common venting system must be modi-
fied to correct the problem.
Resize the common venting system to the minimum
vent pipe size determined by using the appropriate
tables in Appendix G. (These are in the current stan-
dards of the National Fuel Gas Code ANSI Z223.1.
Page 37
Electrical
ELECTROSTATIC DISCHARGE (ESD)
Precautions and Procedures
CAUTION Electrostatic discharge can affect elec- tronic components. Take precautions to neutralize electrostatic charge by touching your hand and tools to metal prior to handling the control.
INTERIOR MAKEUP BOX INSTALLATION
FIGURE 53
MAKEUP BOX
Left side
INTERIOR MAKEUP BOX INSTALLATION
FIGURE 54
MAKEUP BOX
Right Side
remove and relocate plug to unused
opening on left side
The unit is equipped with a field makeup box. The make
up box may be moved to the right side of the furnace to fa-
cilitate installation. Seal unused openings on left side with
plugs removed from right side. Secure the excess wire to
the existing harness to protect it from damage.
Refer to figure 56 for field wiring and figure 57 for schematic
wiring diagram and troubleshooting.
The power supply wiring must meet Class I restrictions.
Protected by either a fuse or circuit breaker, select circuit
protection and wire size according to unit nameplate.
NOTE Unit nameplate states maximum current draw.
Maximum OverCurrent Protection allowed is 15 AMP.
Holes are on both sides of the furnace cabinet to facilitate
wiring.
Install a separate (properly sized) disconnect switch near
the furnace so that power can be turned off for servicing.
Before connecting the thermostat check to make sure the
wires will be long enough for servicing at a later date. Make
sure that thermostat wire is long enough to facilitate future
removal of blower for service.
Complete the wiring connections to the equipment. Use the
provided unit wiring diagram and the field wiring diagram
shown in figure 56. Use 18gauge wire or larger that is suit-
able for Class II rating for thermostat connections.
Electrically ground the unit according to local codes or, in
the absence of local codes, according to the current Na-
tional Electric Code (ANSI/NFPA No. 70) for the USA and
current Canadian Electric Code part 1 (CSA standard
C22.1) for Canada. A green ground wire is provided in the
field makeup box.
NOTE The EL195UH furnace contains electronic compo-
nents that are polarity sensitive. Make sure that the furnace
is wired correctly and is properly grounded.
Accessory Terminals
One line voltage EAC" 1/4" spade terminal is provided on
the furnace integrated control. See figure 58 for integrated
control configuration. This terminal is energized when the
indoor blower is operating. Any accessory rated up to one
amp can be connected to this terminal with the neutral leg
of the circuit being connected to one of the provided neutral
terminals. If an accessory rated at greater than one amp is
connected to this terminal, it is necessary to use an exter-
nal relay.
One line voltage HUM" 1/4" spade terminal is provided on
the furnace integrated control. See figure 58 for integrated
control configuration. This terminal is energized in the
heating mode when the combustion air inducer is operat-
ing. Any humidifier rated up to one amp can be connected
to this terminal with the neutral leg of the circuit being con-
nected to one of the provided neutral terminals. If a humidi-
fier rated at greater than one amp is connected to this termi-
nal, it is necessary to use an external relay relay.
Page 38
One 24V "H" 1/4" spade terminal is provided on the furnace
integrated control. See figure 58 for integrated control con-
figuration. The terminal is energized in the heating mode
when the combustion air inducer is operating and the pres-
sure switch is closed. Any humidifier rated up to 0.5 amp
can be connected to this terminal with the ground leg of the
circuit connected to ground or the "C" terminal.
Thermostat Furnace Condensing Unit
EL195UH and CONDENSING UNIT THERMOSTAT DESIGNATIONS
(Refer to specific thermostat and outdoor unit.)
COMMON
POWER
HEAT
INDOOR BLOWER
Y
C
R
G
W1
Y
C
R
G
W
COOLING
FIGURE 55
CONDENSING UNIT
CONDENSING UNIT COMMON
*CONDENSING UNIT
*NOTE R" REQUIRED ON SOME OUTDOOR UNITS
Install the room thermostat according to the instruc- tions provided with the thermostat. See figure 55 for thermostat designations. If the furnace is being matched with a heat pump, refer to the FM21 installa- tion instruction or appropriate dual fuel thermostat in- structions.
Indoor Blower Speeds
1 When the thermostat is set to FAN ON," the indoor blower will run continuously on the fan speed when there is no cooling or heating demand.
2 When the EL195UH is running in the heating mode, the indoor blower will run on the heating speed.
3 When there is a cooling demand, the indoor blower will run on the cooling speed.
Generator Use Voltage Requirements
The following requirements must be kept in mind when
specifying a generator for use with this equipment:
The furnace requires 120 volts + 10% (Range: 108 volts to 132 volts).
The furnace operates at 60 Hz + 5% (Range: 57 Hz to 63 Hz).
The furnace integrated control requires both polarity and proper ground. Both polarity and proper grounding should be checked before attempting to operate the furnace on either permanent or temporary power.
Generator should have a wave form distortion of less than 5% THD (total harmonic distortion).
TYPICAL EL195UH FIELD WIRING DIAGRAM
FIGURE 56
IGNITOR
*R
*NOTE R" REQUIRED ON SOME OUTDOOR UNITS
Page 39
TYPICAL EL195UH WIRING DIAGRAM
FIGURE 57
Page 40
FIGURE 58
INTEGRATED CONTROL (Automatic Hot Surface Ignition System)
TERMINAL DESIGNATIONS HUM
LINE
XFMR
EAC
COOL
HEAT
PARK
FLAME
FAN
Humidifier (120VAC)
Input (120VAC)
Transformer (120VAC)
Indoor Air Quality Accessories (120VAC)
Blower Cooling Speed (120VAC)
Blower Heating Speed (120VAC)
Dead terminals to park alternate speed taps
Flame sensor
Continuous blower
Blower off delay jumper
HUM Humidifier (24VAC)
Red LED Recall
Unit StartUp
FOR YOUR SAFETY READ BEFORE OPERATING
WARNING Do not use this furnace if any part has been under- water. A flooddamaged furnace is extremely dan- gerous. Attempts to use the furnace can result in fire or explosion. Immediately call a qualified ser- vice technician to inspect the furnace and to replace all gas controls, control system parts, and electrical parts that have been wet or to replace the furnace, if deemed necessary.
WARNING Danger of explosion. Can cause injury or product or property damage. Should the gas supply fail to shut off or if overheating occurs, shut off the gas valve to the furnace before shutting off the electrical supply.
CAUTION Before attempting to perform any service or mainte- nance, turn the electrical power to unit OFF at dis- connect switch.
BEFORE LIGHTING the unit, smell all around the fur-
nace area for gas. Be sure to smell next to the floor be-
cause some gas is heavier than air and will settle on the
floor.
The gas valve on the EL195UH is equipped with a gas
control switch (lever). Use only your hand to move
switch. Never use tools. If the the switch will not move by
hand, do not try to repair it. Force or attempted repair may
result in a fire or explosion.
Placing the furnace into operation:
EL195UH units are equipped with an automatic hot sur-
face ignition system. Do not attempt to manually light
burners on this furnace. Each time the thermostat calls
for heat, the burners will automatically light. The ignitor
does not get hot when there is no call for heat on these
units.
Page 41
Priming Condensate Trap
The condensate trap should be primed with water prior to
startup to ensure proper condensate drainage. Either
pour 10 fl. oz. (300 ml) of water into the trap, or follow
these steps to prime the trap:
1 Follow the lighting instructions to place the unit into op-
eration.
2 Set the thermostat to initiate a heating demand.
3 Allow the burners to fire for approximately 3 minutes.
4 Adjust the thermostat to deactivate the heating de-
mand.
5 Wait for the combustion air inducer to stop. Set the
thermostat to initiate a heating demand and again al-
low the burners to fire for approximately 3 minutes.
6 Adjust the thermostat to deactivate the heating de-
mand and wait for the combustion air inducer to stop.
At this point, the trap should be primed with sufficient
water to ensure proper condensate drain operation.
WARNING If you do not follow these instructions exactly, a fire or explosion may result causing property damage, personal injury or death.
Gas Valve Operation (Figure 59)
1 STOP! Read the safety information at the beginning of
this section.
2 Set the thermostat to the lowest setting.
3 Turn off all electrical power to the unit.
4 This furnace is equipped with an ignition device which
automatically lights the burners. Do not try to light the
burners by hand.
5 Remove the access panel.
6 Move gas valve switch to OFF. See figure 59.
7 Wait five minutes to clear out any gas. If you then smell
gas, STOP! Immediately call your gas supplier from a
neighbors phone. Follow the gas suppliers instruc-
tions. If you do not smell gas go to next step.
8 Move gas valve switch to ON. See figure 59.
FIGURE 59
GAS VALVE SHOWN IN ON POSITION
MANIFOLD PRESSURE
OUTLET PORT
INLET PRESSURE
PORT
MANIFOLD PRESSURE ADJUSTMENT SCREW (under barbed fitting)
9 Replace the access panel.
10 Turn on all electrical power to to the unit.
11 Set the thermostat to desired setting.
NOTE When unit is initially started, steps 1 through 11
may need to be repeated to purge air from gas line.
12 If the appliance will not operate, follow the instructions
Turning Off Gas to Unit" and call your service techni-
cian or gas supplier.
Turning Off Gas to Unit
1 Set the thermostat to the lowest setting.
2 Turn off all electrical power to the unit if service is to be
performed.
3 Remove the access panel.
4 Move gas valve switch to OFF.
5 Replace the access panel.
Failure To Operate
If the unit fails to operate, check the following:
1 Is the thermostat calling for heat?
2 Are access panels securely in place?
3 Is the main disconnect switch closed?
4 Is there a blown fuse or tripped breaker?
5 Is the filter dirty or plugged? Dirty or plugged filters will cause the limit control to shut the unit off.
6 Is gas turned on at the meter?
7 Is the manual main shut-off valve open?
8 Is the internal manual shut-off valve open?
9 Is the unit ignition system in lockout? If the unit locks out again, inspect the unit for blockages.
Heating Sequence Of Operation
1 When thermostat calls for heat, combustion air inducer starts.
2 Combustion air pressure switch proves blower opera- tion. Switch is factory set and requires no adjustment.
3 After a 15second prepurge, the hot surface ignitor en- ergizes.
4 After a 20second ignitor warmup period, the gas valve solenoid opens. A 4second trial for ignition peri- od begins."
5 Gas is ignited, flame sensor proves the flame, and the combustion process continues.
6 If flame is not detected after first ignition trial, the igni- tion control will repeat steps 3 and 4 four more times before locking out the gas valve (WATCHGUARD" flame failure mode). The ignition control will then auto- matically repeat steps 1 through 6 after 60 minutes. To interrupt the 60minute WATCHGUARD" period, move thermostat from Heat" to OFF" then back to Heat". Heating sequence then restarts at step 1.
Page 42
Gas Pressure Adjustment
Gas Flow (Approximate)
TABLE 9
GAS METER CLOCKING CHART
EL195 Unit
Seconds for One Revolution
Natural LP
1 cu ft Dial
2 cu ft Dial
1 cu ft Dial
2 cu ft DIAL
045 80 160 200 400
070 55 110 136 272
090 41 82 102 204
110 33 66 82 164
135 27 54 68 136
Natural1000 btu/cu ft LP2500 btu/cu ft
Furnace should operate at least 5 minutes before check-
ing gas flow. Determine time in seconds for two revolu-
tions of gas through the meter. (Two revolutions assures a
more accurate time.) Divide by two and compare to time
in table 9 below. If manifold pressure matches table 10
and rate is incorrect, check gas orifices for proper size and
restriction. Remove temporary gas meter if installed.
NOTE To obtain accurate reading, shut off all other gas
appliances connected to meter.
Supply Pressure Measurement
When testing supply gas pressure, use the 1/8" N.P.T.
plugged tap or pressure post located on the gas valve to
facilitate test gauge connection. See figure 59. Check gas
line pressure with unit firing at maximum rate. Low pres-
sure may result in erratic operation or underfire. High pres-
sure can result in permanent damage to gas valve or over-
fire.
On multiple unit installations, each unit should be checked
separately, with and without units operating. Supply pres-
sure must fall within range listed in table 10.
Manifold Pressure Measurement
1 Remove the threaded plug from the outlet side of the
gas valve and install a fieldprovided barbed fitting.
Connect to a manometer to measure manifold pres-
sure.
2 Start unit and allow 5 minutes for unit to reach steady
state.
3 While waiting for the unit to stabilize, observe the
flame. Flame should be stable and should not lift from
burner. Natural gas should burn blue.
4 After allowing unit to stabilize for 5 minutes, record
manifold pressure and compare to value given in table
10.
NOTE Shut unit off and remove manometer as soon as an
accurate reading has been obtained. Take care to remove
barbed fitting and replace threaded plug.
TABLE 10 Supply Line and Manifold Pressure (inches w.c.)
Unit Fuel Manifold Pressure
Line Pressure
All Nat 3.5 4.5 10.5
All LP/Propane 10.0 11.0 13.0
Proper Combustion
Furnace should operate minimum 15 minutes with correct
manifold pressure and gas flow rate before checking com-
bustion. Take combustion sample beyond the flue outlet
and compare to the tables below.
TABLE 11 EL195 Unit
CO2% For Nat CO2% For LP
045
7.2 8.2 8.6 9.6
070
090
110
135 The maximum carbon monoxide reading should not exceed 50 ppm.
High Altitude Information
NOTE In Canada, certification for installations at eleva-
tions over 4500 feet (1372 m) is the jurisdiction of local au-
thorities.
Units installed at altitude of 4501 10,000 feet (1373 to
3048m) may require a pressure switch change which can
be ordered separately. Table 12 lists conversion kit and
pressure switch requirements at varying altitudes.
The combustion air pressure switch is factoryset and re-
quires no adjustment.
Page 43
TABLE 12 LP/Propane Conversion Kit and Pressure Switch Requirements at Varying Altitudes
EL195 Unit
Natural to LP/Propane
High Altitude Natural Burner
Orifice Kit
High Altitude LP/Propane Burner
Orifice Kit High Altitude Pressure Switch
0 7500 ft (0 2286m)
7501 10,000 ft (2286 3038m)
7501 10,000 ft (2286 3038m)
4501 7500 ft (1373 2286m)
7501 10,000 ft (2286 3048m)
045
*69W73 73W37 *68W68
No Change 74W90
070 77W43 73W22
090 77W42 73W22
110 77W43 73W22
135 77W42 73W22
* Conversion requires installation of a gas valve manifold spring which is provided with the gas conversion kit. Pressure switch is factory set. No adjustment necessary. All models use the factoryinstalled pressure switch from 04500 feet (01370 m).
Testing for Proper Venting and Sufficient Combustion Air for NonDirect Vent Applications
WARNING CARBON MONOXIDE POISONING HAZARD!
Failure to follow the steps outlined below for each appliance connected to the venting system being placed into operation could result in carbon monox- ide poisoning or death. The following steps shall be followed for each ap- pliance connected to the venting system being placed into operation, while all other appliances con- nected to the venting system are not in operation.
After the EL195UH gas furnace has been started, the fol-
lowing test should be conducted to ensure proper venting
and sufficient combustion air has been provided to the
EL195UH as well as to other gas-fired appliances which
are separately vented.
If a EL195UH furnace replaces a Category I furnace which
was commonly vented with another gas appliance, the size
of the existing vent pipe for that gas appliance must be
checked. Without the heat of the original furnace flue prod-
ucts, the existing vent pipe is probably oversized for the
single water heater or other appliance. The vent should be
checked for proper draw with the remaining appliance.
The test should be conducted while all appliances (both in
operation and those not in operation) are connected to the
venting system being tested. If the venting system has
been installed improperly, or if provisions have not been
made for sufficient amounts of combustion air, corrections
must be made as outlined in the previous section.
1 Seal any unused openings in the venting system.
2 Visually inspect the venting system for proper size and
horizontal pitch. Determine there is no blockage or re- striction, leakage, corrosion, or other deficiencies which could cause an unsafe condition.
3 To the extent that it is practical, close all building doors and windows and all doors between the space in which the appliances connected to the venting system are lo- cated and other spaces of the building.
4 Close fireplace dampers.
5 Turn on clothes dryers and any appliances not con- nected to the venting system. Turn on any exhaust fans, such as range hoods and bathroom exhausts, so they will operate at maximum speed. Do not operate a summer exhaust fan.
6 Follow the lighting instruction to place the appliance being inspected into operation. Adjust thermostat so appliance will operate continuously.
7 Use the flame of match or candle to test for spillage of flue gases at the draft hood relief opening after 5 min- utes of main burner operation.
8 If improper venting is observed during any of the above tests, the venting system must be corrected or sufficient combustion/make-up air must be provided. The venting system should be re-sized to approach the minimum size as determined by using the ap- propriate tables in appendix G in the current standards of the National Fuel Gas Code ANSIZ223.1/NPFA 54 in the U.S.A., and the appropriate Natural Gas and Propane appliances venting sizing tables in the cur- rent standard of the CSAB149 Natural Gas and Pro- pane Installation Codes in Canada.
9 After determining that each appliance remaining connected to the common venting system properly vents when tested as indicated in step 3, return doors, windows, exhaust fans, fireplace dampers and any other gas-burning appliance to their previous condition of use.
Page 44
Other Unit Adjustments
NOTE See troubleshooting flow charts if any safety
switches are found to be open.
Primary Limit.
The primary limit is located on the heating compartment
vestibule panel. This limit is factory set and requires no ad-
justment.
Flame Rollout Switches (Two)
These manually reset switches are located on the front of
the burner box.
Pressure Switch
The pressure switch is located in the heating compartment
on the cold end header box. This switch checks for proper
combustion air inducer operation before allowing ignition
trial. The switch is factoryset and must not be adjusted.
Temperature Rise
After the furnace has been started and supply and return air
temperatures have been allowed to stabilize, check the
temperature rise. If necessary, adjust the blower speed to
maintain the temperature rise within the range shown on
the unit nameplate. Increase the blower speed to decrease
the temperature. Decrease the blower speed to increase
the temperature rise. Failure to adjust the temperature rise
may cause erratic limit operation.
Fan Control
Fan On Delay
The heat fan on time of 30 seconds is not adjustable. The
cool fan on delay is 2 seconds and not adjustable.
Fan Off Delay
The heat fan off delay (amount of time that the blower oper- ates after the heat demand has been satisfied) may be ad- justed by changing the jumper position across the five pins on the integrated control. The unit is shipped with a factory fan off setting of 90 seconds. The fan off delay affects com- fort and is adjustable to satisfy individual applications. Ad- just the fan off delay to achieve a supply air temperature be- tween 90 and 110F at the moment that the blower is deenergized. Longer off delay settings provide lower re- turn air temperatures; shorter settings provide higher re- turn air temperatures. See figure 60. The cool fan off delay (amount of time that the blower oper- ates after the cool demand has been satisfied) is 45 sec- onds and not adjustable.
Thermostat Heat Anticipation
Set the heat anticipator setting (if adjustable) according to
the amp draw listed on the wiring diagram that is attached
to the unit.
Electrical
1 Check all wiring for loose connections.
2 Check for the correct voltage at the furnace (furnace
operating). Correct voltage is 120VAC + 10%
3 Check ampdraw on the blower motor with blower ac- cess panel in place. Motor Nameplate__________Actual__________
HEAT FAN-OFF TIME IN SECONDS
To adjust fanoff timing, reposition jumper across pins to achieve desired setting.
NO JUMPER
FIGURE 60
6 0
9 0
1 2 0
1 8 0 6 0
9 0
1 2 0
1 8 0 6
0 9 0
1 2 0
1 8 0 6
0 9 0
1 2 0
1 8 0
60 Second off Time
90 Second off Time
120 Second off Time
180 Second off Time
Blower Speeds
Follow the steps below to change the blower speeds.
1 Turn off electrical power to furnace.
2 Remove blower access panel.
3 Disconnect existing speed tap at integrated control
speed terminal.
NOTE Termination of any unused motor leads must be insulated.
4 Place unused blower speed tap on integrated control
PARK" terminal or insulate.
5 Refer to blower speed selection chart on unit wiring dia-
gram for desired heating or cooling speed. See Blower
performance data beginning on the next page.
6 Connect selected speed tap at integrated control
speed terminal.
7 Resecure blower access panel.
8 Turn on electrical power to furnace.
9 Recheck temperature rise.
Electronic Ignition
The integrated control has an added feature of an internal Watchguard control. The feature serves as an automatic re- set device for integrated control lockout caused by ignition failure. This type of lockout is usually due to low gas line pressure. After one hour of continuous thermostat demand for heat, the Watchguard will break and remake thermostat demand to the furnace and automatically reset the inte- grated control to begin the ignition sequence.
Exhaust and Air Intake Pipe
1 Check exhaust and air intake connections for tightness and to make sure there is no blockage.
2 Is pressure switch closed? Obstructed exhaust pipe will cause unit to shut off at pressure switch. Check ter- mination for blockages.
3 Obstructed pipe or termination may cause rollout switches to open. Reset manual flame rollout switches on burner box assembly if necessary.
Page 45
BLOWER DATA
EL195UH045P36B PERFORMANCE (Less Filter) External
Static Pressure in. w.g.
Air Volume / Watts at Various Blower Speeds
High Medium- High
Medium- Low Low
cfm Watts cfm Watts cfm Watts cfm Watts 0.00 1605 700 1370 590 1160 475 1010 400 0.10 1600 680 1355 565 1155 465 1015 390 0.20 1550 645 1330 540 1150 445 1000 380 0.30 1480 620 1295 520 1140 430 975 365 0.40 1425 590 1280 490 1105 415 975 345 0.50 1355 565 1190 460 1085 395 940 335 0.60 1320 545 1165 435 1030 380 900 315 0.70 1225 500 1110 425 980 355 855 310 0.80 1135 480 1050 395 920 330 780 280 0.90 1025 445 950 360 795 295 700 255
EL195UH070P48B PERFORMANCE (Less Filter) External
Static Pressure in. w.g.
Air Volume / Watts at Various Blower Speeds
High Medium- High
Medium- Low Low
cfm Watts cfm Watts cfm Watts cfm Watts 0.00 2015 1005 1950 840 1870 730 1675 630 0.10 1930 985 1915 830 1805 720 1650 615 0.20 1880 965 1840 805 1760 695 1620 600 0.30 1815 945 1775 790 1700 675 1560 580 0.40 1740 925 1700 770 1630 655 1515 565 0.50 1680 895 1625 750 1545 635 1455 545 0.60 1575 880 1555 720 1485 620 1380 530 0.70 1500 860 1450 700 1380 600 1310 515 0.80 1400 825 1380 680 1315 580 1230 495 0.90 1290 805 1270 655 1235 560 1145 480
EL195UH090P36C PERFORMANCE (Less Filter) External
Static Pressure in. w.g.
Air Volume / Watts at Various Blower Speeds
High Medium- High
Medium- Low Low
cfm Watts cfm Watts cfm Watts cfm Watts 0.00 1630 715 1345 590 1090 475 885 385 0.10 1615 700 1320 580 1070 465 890 380 0.20 1580 675 1305 570 1070 455 890 370 0.30 1525 620 1295 535 1060 435 890 360 0.40 1480 615 1275 515 1055 430 885 350 0.50 1415 565 1220 485 1030 410 860 330 0.60 1350 535 1175 450 1005 390 835 310 0.70 1260 505 1115 415 955 360 785 290 0.80 1190 480 1010 380 880 325 740 285 0.90 1060 435 930 360 795 295 655 250
EL195UH090P48C PERFORMANCE (Less Filter) External
Static Pressure in. w.g.
Air Volume / Watts at Various Blower Speeds
High Medium- High
Medium- Low Low
cfm Watts cfm Watts cfm Watts cfm Watts 0.00 2140 880 1895 780 1590 645 1350 550 0.10 2110 850 1880 760 1585 635 1360 545 0.20 2060 810 1835 725 1580 620 1360 520 0.30 1990 765 1805 690 1550 585 1365 495 0.40 1925 750 1755 655 1510 545 1330 470 0.50 1830 700 1680 610 1455 525 1285 450 0.60 1720 645 1610 575 1390 480 1230 415 0.70 1600 615 1525 535 1300 465 1165 390 0.80 1455 560 1410 495 1195 430 1035 365 0.90 1300 515 1305 465 1100 390 900 320
EL195UH045P24B PERFORMANCE (Less Filter) External
Static Pressure in. w.g.
Air Volume / Watts at Various Blower Speeds
High Medium- High
Medium- Low Low
cfm Watts cfm Watts cfm Watts cfm Watts 0.00 1140 455 920 365 765 295 710 265 0.10 1135 445 900 360 765 290 690 255 0.20 1125 430 895 350 755 285 680 255 0.30 1090 415 870 340 725 280 660 250 0.40 1065 405 870 325 715 270 635 245 0.50 1020 390 825 315 675 260 605 235 0.60 945 365 780 300 640 250 555 225 0.70 910 350 740 295 585 240 505 220 0.80 790 325 670 275 510 225 455 205 0.90 735 310 575 255 460 220 390 195
EL195UH070P36B PERFORMANCE (Less Filter) External
Static Pressure in. w.g.
Air Volume / Watts at Various Blower Speeds
High Medium- High
Medium- Low Low
cfm Watts cfm Watts cfm Watts cfm Watts 0.00 1585 685 1340 585 1095 480 880 380 0.10 1560 665 1320 565 1085 470 885 375 0.20 1515 630 1300 540 1080 460 880 370 0.30 1465 590 1275 520 1065 440 890 360 0.40 1410 570 1235 490 1050 420 875 350 0.50 1345 540 1195 470 1020 400 840 335 0.60 1275 510 1140 440 975 365 830 315 0.70 1195 485 1090 410 930 355 780 290 0.80 1105 460 995 380 850 325 730 275 0.90 985 420 890 345 770 300 650 255
EL195UH110P48C PERFORMANCE (Less Filter) External
Static Pressure in. w.g.
Air Volume / Watts at Various Blower Speeds
High Medium- High
Medium- Low Low
cfm Watts cfm Watts cfm Watts cfm Watts 0.00 2000 910 1675 765 1360 635 1185 525 0.10 1980 895 1650 745 1370 610 1180 505 0.20 1935 855 1600 710 1400 590 1170 485 0.30 1875 830 1560 680 1370 570 1160 490 0.40 1800 785 1490 655 1325 545 1120 455 0.50 1725 720 1400 610 1295 515 1080 435 0.60 1630 685 1335 585 1185 480 1030 410 0.70 1530 665 1290 525 1100 435 940 385 0.80 1410 610 1190 485 985 400 790 365 0.90 1245 560 1000 430 925 380 715 315
Page 46
BLOWER DATA
EL195UH110P60C PERFORMANCE (Less Filter)
External Static
Pressure in. w.g.
Air Volume / Watts at Different Blower Speeds Bottom Return Air, Side Return Air with Optional Return Air Base, Return Air from Both Sides or Return Air from Bottom and One Side.
Single Side Return Air Air volumes in bold require field fabricated transition to accommodate 20 x 25 x 1 in. air filter in order to maintain proper air velocity.
High Medium-High Medium-Low Low High Medium-High Medium-Low Low cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
0.00 2485 1515 2090 1070 1835 865 1380 660 2400 1475 2100 1075 1755 870 1320 655 0.10 2460 1475 2075 1040 1810 835 1390 650 2370 1440 2090 1060 1735 850 1330 645 0.20 2405 1445 2040 995 1790 820 1405 650 2320 1405 2060 1050 1720 835 1340 650 0.30 2335 1375 1990 980 1760 790 1460 635 2235 1350 2040 1030 1725 825 1350 645 0.40 2215 1355 1935 940 1740 775 1410 630 2165 1330 1975 970 1700 815 1330 632 0.50 2185 1310 1865 895 1680 750 1410 625 2040 1290 1920 945 1700 790 1325 620 0.60 2060 1270 1805 870 1630 720 1405 610 1960 1260 1845 910 1635 770 1340 620 0.70 1945 1235 1700 840 1605 700 1380 590 1865 1215 1750 890 1575 730 1295 600 0.80 1845 1210 1605 810 1505 670 1305 570 1715 1175 1590 840 1505 710 1280 590 0.90 1730 1150 1570 790 1470 660 1250 540 1630 1135 1490 685 1460 685 1235 565
EL195UH135P60D PERFORMANCE (Less Filter)
External Static
Pressure in. w.g.
Air Volume / Watts at Different Blower Speeds Bottom Return Air, Side Return Air with Optional Return Air Base, Return Air from Both Sides or Return Air from Bottom and One Side.
Single Side Return Air Air volumes in bold require field fabricated transition to accommodate 20 x 25 x 1 in. air filter in order to maintain proper air velocity.
High Medium-High Medium-Low Low High Medium-High Medium-Low Low cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
0.00 2595 1515 2245 2015 1780 890 1365 700 2540 1500 2185 1095 1715 880 1350 700 0.10 2570 1490 2235 1095 1765 875 1370 665 2525 1480 2165 1085 1725 870 1335 675 0.20 2440 1465 2135 1075 1745 865 1395 660 2440 1445 2120 1090 1725 865 1345 675 0.30 2340 1405 2075 1060 1755 845 1365 660 2345 1400 2060 1060 1715 850 1345 670 0.40 2255 1370 1995 1005 1680 825 1370 660 2220 1345 1955 1015 1685 820 1370 660 0.50 2095 1320 1915 960 1650 805 1335 650 2100 1310 1895 985 1620 805 1320 650 0.60 1995 1270 1840 935 1595 775 1320 630 2005 1285 1780 945 1605 790 1285 635 0.70 1900 1225 1755 905 1540 755 1270 615 1845 1235 1700 910 1510 740 1225 610 0.80 1740 1180 1650 875 1430 725 1190 590 1745 1185 1645 880 1450 720 1175 595 0.90 1580 1140 1535 840 1350 695 1145 570 1655 1160 1545 840 1380 705 1135 575
EL195UH090P60C PERFORMANCE (Less Filter)
External Static
Pressure in. w.g.
Air Volume / Watts at Different Blower Speeds Bottom Return Air, Side Return Air with Optional Return Air Base, Return Air from Both Sides or Return Air from Bottom and One Side.
Single Side Return Air Air volumes in bold require field fabricated transition to accommodate 20 x 25 x 1 in. air filter in order to maintain proper air velocity.
High Medium-High Medium-Low Low High Medium-High Medium-Low Low cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts cfm Watts
0.00 2445 1290 2235 1000 1875 840 1495 660 2445 1355 2180 1020 1785 850 1400 665 0.10 2430 1270 2220 985 1860 830 1500 650 2425 1335 2160 1010 1775 840 1405 655 0.20 2370 1260 2170 960 1875 805 1515 645 2390 1310 2135 985 1790 825 1435 645 0.30 2290 1220 2110 935 1855 785 1545 640 2305 1270 2080 960 1805 805 1455 640 0.40 2200 1190 2055 900 1835 765 1560 625 2230 1240 2015 925 1775 780 1460 630 0.50 2095 1155 1970 865 1785 735 1520 610 2150 1215 1965 900 1745 755 1460 620 0.60 2010 1145 1920 850 1725 715 1495 600 2055 1170 1890 865 1695 730 1440 605 0.70 1960 1120 1835 815 1655 690 1455 575 1955 1145 1805 840 1640 705 1415 590 0.80 1845 1080 1720 785 1570 665 1390 550 1825 1095 1705 815 1565 675 1360 565 0.90 1725 1040 1620 755 1490 645 1305 530 1715 1065 1590 775 1470 645 1290 540
Page 47
Service
WARNING ELECTRICAL SHOCK, FIRE, OR EXPLOSION HAZARD.
Failure to follow safety warnings exactly could result in dangerous operation, serious injury, death or property damage. Improper servicing could result in dangerous opera- tion, serious injury, death, or property damage. Before servicing, disconnect all electrical power to furnace. When servicing controls, label all wires prior to dis- connecting. Take care to reconnect wires correctly. Verify proper operation after servicing.
At the beginning of each heating season, system should be
checked as follows by a qualified service technician:
Blower
Check the blower wheel for debris and clean if necessary.
The blower motors are prelubricated for extended bearing
life. No further lubrication is needed.
WARNING The blower access panel must be securely in place when the blower and burners are operating. Gas fumes, which could contain carbon monoxide, can be drawn into living space resulting in personal inju- ry or death.
Filters
All air filters are installed external to the unit. Filters should
be inspected monthly. Clean or replace the filters when
necessary to ensure proper furnace operation. Table 1
lists recommended filter sizes.
Exhaust and air intake pipes
Check the exhaust and air intake pipes and all connections
for tightness and to make sure there is no blockage.
NOTE After any heavy snow, ice or frozen fog event the
furnace vent pipes may become restricted. Always check
the vent system and remove any snow or ice that may be
obstructing the plastic intake or exhaust pipes.
Electrical
1 Check all wiring for loose connections.
2 Check for the correct voltage at the furnace (furnace
operating).
3 Check ampdraw on the blower motor. Motor Nameplate__________Actual__________
Winterizing and Condensate Trap Care
1 Turn off power to the furnace.
2 Have a shallow pan ready to empty condensate water.
3 Remove the clean out cap from the condensate trap
and empty water. Inspect the trap then reinstall the
clean out cap.
Cleaning Heat Exchanger If cleaning the heat exchanger becomes necessary, follow
the below procedures and refer to figure 1 when disassem-
bling unit. Use papers or protective covering in front of fur-
nace while removing heat exchanger assembly.
1 Turn off electrical and gas supplies to the furnace.
2 Remove the furnace access panels.
3 Disconnect the 2 wires from the gas valve.
4 Remove gas supply line connected to gas valve. Re-
move the burner box cover (if equipped) and remove
gas valve/manifold assembly.
5 Remove sensor wire from sensor. Disconnect 2-pin
plug from the ignitor.
6 Disconnect wires from flame rollout switches.
7 Disconnect combustion air intake pipe. It may be nec-
essary to cut the existing pipe to remove burner box
assembly.
8 Remove four burner box screws at the vestibule panel
and remove burner box. Set burner box assembly
aside.
NOTE If necessary, clean burners at this time. Follow
procedures outlined in Burner Cleaning section.
9 Loosen the clamps to the flexible exhaust coupling.
10 Disconnect condensate drain line from the cold end
header box.
11 Disconnect condensate drain tubing from flue collar.
Remove screws that secures the flue collar into place.
Remove flue collar. It may be necessary to cut the exit-
ing exhaust pipe for removal of the fitting.
12 Mark and disconnect all combustion air pressure tub-
ing from cold end header collector box.
13 Mark and remove wires from pressure switch assemb-
ly. Remove the assembly. Keep tubing attached to
pressure switches.
14 Disconnect the plug from the combustion air inducer.
Remove two screws which secure combustion air in-
ducer to collector box. Remove combustion air induc-
er assembly. Remove ground wire from vest panel.
15 Disconnect the condensate drain line.
16 Remove cold end header box.
17 Remove electrical junction box from the side of the fur-
nace.
18 Mark and disconnect any remaining wiring to heating
compartment components. Disengage strain relief
bushing and pull wiring and bushing through the hole in
the blower deck.
19 Remove the primary limit from the vestibule panel.
20 Remove two screws from the front cabinet flange at
the blower deck. Spread cabinet sides slightly to allow
clearance for removal of heat exchanger.
Page 48
21 Remove screws along vestibule sides and bottom
which secure vestibule panel and heat exchanger as-
sembly to cabinet. Remove two screws from blower
rail which secure bottom heat exchanger flange. Re-
move heat exchanger from furnace cabinet.
22 Back wash heat exchanger with soapy water solution
or steam. If steam is used it must be below 275F
(135C) .
23 Thoroughly rinse and drain the heat exchanger. Soap
solutions can be corrosive. Take care to rinse entire
assembly.
24 Reinstall heat exchanger into cabinet making sure that
the clamshells of the heat exchanger assembly is en-
gaged properly into the support bracket on the blower
deck. Remove the indoor blower to view this area
through the blower opening.
25 Re-secure the supporting screws along the vestibule
sides and bottom to the cabinet.
26 Reinstall cabinet screws on front flange at blower
deck.
27 Reinstall the primary limit on the vestibule panel.
28 Route heating component wiring through hole in blow-
er deck and reinsert strain relief bushing.
29 Reinstall electrical junction box.
30 Reinstall the cold end header box.
31 Reinstall the combustion air inducer. Reconnect the
plug to the wire harness.
32 Reinstall pressure switches and reconnect pressure
switch wiring.
33 Carefully connect combustion air pressure switch
tubing from pressure switches to proper ports on
cold end header collector box.
34 Reconnect condensate drain line to the cold end
header box.
35 Use securing screws to reinstall flue collar to the top
cap on the furnace. Reconnect exhaust piping and ex-
haust drain tubing.
36 Replace flexible exhaust adapter on combustion air in-
ducer and flue collar. Secure using two existing hose
clamps.
37 Reinstall burner box assembly in vestibule area. Se-
cure burner box assembly to vestibule panel using
four existing screws. Make sure burners line up in
center of burner ports
38 Reconnect flame rollout switch wires.
39 Reconnect sensor wire and reconnect 2pin plug from
ignitor.
40 Reinstall gas valve manifold assembly. Reconnect
gas supply line to gas valve.
41 Reconnect the combustion air intake pipe.
42 Reinstall burner box cover.
43 Reconnect wires to gas valve.
44 Replace the blower compartment access panel.
45 Reconnect gas supply piping. Turn on power and gas
supply to unit.
46 Follow lighting instructions on unit nameplate to light
and operate furnace for 5 minutes to ensure the fur-
nace is operating properly.
47 Check all piping connections, factory and field, for gas
leaks. Use a leak detecting solution or other preferred
means.
48 Replace heating compartment access panel.
CAUTION Some soaps used for leak detection are corrosive to certain metals. Carefully rinse piping thoroughly af- ter leak test has been completed. Do not use matches, candles, flame or other sources of ignition to check for gas leaks.
Cleaning the Burner Assembly (if needed)
1 Turn off electrical and gas power supplies to furnace.
Remove upper and lower furnace access panels.
2 Disconnect the wires from the gas valve.
3 Remove the burner box cover (if equipped).
4 Disconnect the gas supply line from the gas valve. Re-
move gas valve/manifold assembly.
5 Mark and disconnect sensor wire from the sensor. Dis-
connect wires from flame rollout switches.
6 Disconnect combustion air intake pipe. It may be nec-
essary to cut the existing pipe to remove burner box
assembly.
7 Remove four screws which secure burner box assem-
bly to vest panel. Remove burner box from the unit.
8 Use the soft brush attachment on a vacuum cleaner to
gently clean the face of the burners. Visually inspect
the inside of the burners and crossovers for any block-
age caused by foreign matter. Remove any blockage.
9 Reinstall the burner box assembly using the existing
four screws. Make sure that the burners line up in the
center of the burner ports.
10 Reconnect the sensor wire and reconnect the 2pin
plug to the ignitor wiring harness. Reconnect wires to
flame rollout switches.
11 Reinstall the gas valve manifold assembly. Reconnect
the gas supply line to the gas valve. Reinstall the burn-
er box cover.
12 Reconnect wires to gas valve.
13 Replace the blower compartment access panel.
14 Refer to instruction on verifying gas and electrical con-
nections when reestablishing supplies.
15 Follow lighting instructions to light and operate fur-
nace for 5 minutes to ensure that heat exchanger is
clean and dry and that furnace is operating properly.
16 Replace heating compartment access panel.
Page 49
Planned Service
A service technician should check the following items dur-
ing an annual inspection. Power to the unit must be shut off
for safety.
Fresh air grilles and louvers (on the unit and in the room
where the furnace is installed) Must be open and unob-
structed to provide combustion air.
Burners Must be inspected for rust, dirt, or signs of water.
Vent pipe Must be inspected for signs of water, cracked,
damaged or sagging pipe, or disconnected joints.
Unit appearance Must be inspected for rust, dirt, signs
of water, burnt or damaged wires, or components.
Blower access door Must be properly in place and pro-
vide a seal between the return air and the room where the
furnace is installed.
Return air duct Must be properly attached and provide
an air seal to the unit.
Operating performance Unit must be observed during
operation to monitor proper performance of the unit and the
vent system.
Combustion gases Flue products must be analyzed and
compared to the unit specifications.
Problems detected during the inspection may make it nec-
essary to temporarily shut down the furnace until the items
can be repaired or replaced.
Instruct the homeowners to pay attention to their
furnace. Situations can arise between annual furnace in-
spections that may result in unsafe operation. For instance,
items innocently stored next to the furnace may obstruct
the combustion air supply. This could cause incomplete
combustion and the production of carbon monoxide gas.
Ignition Control Board Diagnostic Codes
RED LED Flash Code
Diagnostic Codes / Status of Furnace
Off No power to control or board fault detected
Heartbeat1 Control powered displayed during all modes of operation if no errors are detected
1 Reverse Line Voltage Polarity
2 Improper Earth Ground
3 Burner failed to light, or lost flame during heat demand
4 Low Flame Signal check flame sensor
5 Watchguard burner failed to light, exceeded maximum number of retries or recycles.
6 Ignitor Circuit Failure not available on this control
7 Primary or Secondary Limit Open or Watchguard Mode Limit Switch Open longer than 3 min- utes
8 Rollout Switch Open
9 Pressure Switch failed to close or opened during heat demand
10 Watchguard Pressure Switch opened 5 times during one heat demand
11 Pressure Switch stuck closed prior to activation of combustion air inducer
12 Flame Sensed without gas valve energized
13 Low Line Voltage
Notes
Note 1 A "Heartbeat" is indicated by a "Slow Flash" 1 sec on 1 sec off, repeating
Note Error codes are indicated by a "Rapid Flash" the LED flashes X times at 1/2 sec on 1/2 sec off, remains off for 3 sec, then repeats
Note Last 10 error codes are stored in memory To recall, press and release button, most recent will be displayed first, LED off for 3 sec, then next error code is displayed, etc. To clear error codes, depress and hold button longer than 5 seconds.
Page 50
Troubleshooting: Heating Sequence of Operation
HEATING SEQUENCE OF OPERATION
NORMAL HEATING MODE ABNORMAL HEATING MODE
CONTROL SELFCHECK OKAY?
BURNER OFF?
(Flame sensed without gas valve energized)
NORMAL OPERATION: LED SLOW FLASH
NO
YES
YES
GAS VALVE OFF. COMBUSTION AIR INDUCER OFF. INDOOR BLOWER DELAY OFF.
LED SLOW FLASH (RESET CONTROL BY TURNING MAIN POWER OFF.)
LED FLASHES CODE 1 POLARITY REVERSED.
POWER ON
IS POLARITY CORRECT?
ROLLOUT SWITCH CLOSED?
THERMOSTAT CALLS FOR HEAT: LED SLOW FLASH
IS COMBUSTION AIR PRESSURE SWITCH OPEN?
LED FLASHES CODE 8 ROLLOUT SWITCH OPEN. GAS VALVE OFF. COMBUSTION AIR INDUCER ON.
INDOOR BLOWER ON. SEQUENCE HOLDS UNTIL ROLLOUT SWITCH CLOSES
AND POWER IS RESET OR TSTAT IS INTERRUPTED FOR MINIMUM OF 1 SECOND.
LED FLASHES CODE 12 FLAME SENSED WITHOUT GAS VALVE ENERGIZED.
GAS VALVE OFF. COMBUSTION AIR INDUCER ON. INDOOR BLOWER ON HEATING SPEED.
LED FLASHES CODE 11 PRESSURE SWITCH CLOSED.
GAS VALVE OFF COMBUSTION AIR INDUCER OFF. INDOOR BLOWER
OFF WITH DELAY. (Sequence holds until pressure switch opens or thermostat resets control.)
NO
NO
YES
YES
IS VOLTAGE ABOVE 70 VOLTS?
LED FLASHES CODE 13 LOW LINE VOLTAGE. CONTROL WILL NOT RESPOND TO A CALL FOR
HEATING UNTIL VOLTAGE RISES ABOVE 75 VOLTS.
NO
NO
NO
IS COMBUSTION AIR INDUCER ENERGIZED?
HAS COMBUSTION AIR PRESSURE SWITCH CLOSED IN 2.5 MINUTES?
YES
YES LED FLASHES CODE 9 PRESSURE SWITCH FAILED
TO CLOSE OR OPENED DURING HEAT DEMAND. PRESSURE SWITCH IS IN WATCHGUARD MODE. GAS
VALVE OFF. COMBUSTION AIR INDUCER OFF. INDOOR BLOWER OFF WITH DELAY. IS 5-MINUTE
RESET PERIOD COMPLETE?
NO
PRIMARY LIMIT SWITCH. CLOSED?
YES
YES
CONTINUED NEXT PAGE
LED FLASHES CODE 7 PRIMARY LMIT OPEN. COMBUSTION AIR INDUCER
OFF.INDOOR BLOWER ON NO
YES
NO
YES
IS THERE A PROPER GROUND?
YES
NO LED FLASHES CODE 2 IMPROPER GROUND.
YES
YES
Page 51
Troubleshooting: Heating Sequence of Operation (Continued)
HEATING SEQUENCE CONTINUED
NORMAL HEATING MODE ABNORMAL HEATING MODE
FLAME RECTIFICATION CURRENT CHECK. CAN FLAME BE PROVEN WITHIN 4 SECONDS AFTER GAS VALVE OPENS?
(0.5 microamps)
FLAME PRESENT?
INDOOR BLOWER ON AFTER 30SECOND DELAY
PRIMARY LIMIT SWITCH CLOSED?
COMBUSTION AIR PRESSURE SWITCH CLOSED?
LED FLASHES CODE 4 LOW FLAME SIGNAL.
(Does not affect operation of control)
LED FLASHES CODE 7 PRIMARY LIMIT OPEN GAS VALVE DEENERGIZED.
COMBUSTION AIR INDUCER DEENERGIZED. INDOOR BLOWER ON UNTIL SWITCH CLOSES.
LIMIT SWITCH CLOSED?
HAS PRESSURE SWITCH OPENED 5 TIMES IN THE SAME HEAT DEMAND?
15-SECOND COMBUSTION AIR INDUCER PREPURGE INITIATED BY CLOSED PRESSURE SWITCH.
YES
IGNITOR WARM-UP 20 SECONDS.
YES
YES
FLAME STABILIZATION PERIOD.
GAS VALVE OFF. COMBUSTION AIR INDUCER ON. INDOOR BLOWER OFF.
HAS CONTROL FAILED TO SENSE FLAME FOR FIVE CONSECUTIVE TRIES DURING A SINGLE
HEAT DEMAND?
LED SIGNAL WATCHGUARD FAILURE CODE WATCHGUARD MODE. GAS VALVE OFF.
COMBUSTION AIR INDUCER OFF. INDOOR BLOWER OFF WITH DELAY
IS 60-MINUTE RESET PERIOD COMPLETE?
YES
4 SECONDS
YES
HAS CONTROL RESET IGNITION SEQUENCE FOUR TIMES?
FLAME SIGNAL 1.5 MICROAMPS OR GREATER?
YES
YES
YES
ROLLOUT SWITCH CLOSED? LED FLASHES CODE 8 ROLLOT SWITCH OPEN.
GAS VALVE POWER OFF. COMBUSTION AIR INDUCER POWER ON. INDOOR BLOWER ON SEQUENCE HOLDS UNTIL ROLLOUT
SWITCH IS RESET AND MAIN POWER IS INTERRUPTED OR THERMOSTAT IS CYCLED OFF/ON FOR 1 SEC. MINIMUM.
YES
THERMOSTAT DEMAND SATISFIED.
LED SLOW FLASH.
COMB. AIR INDUCER CONTINUES 5-SECOND POST PURGE AFTER TSTAT DEMAND IS SATISFIED. INDOOR AIR BLOWER COMPLETES SELECTED OFF"
DELAY BEFORE SHUTTING OFF.
YES
NO
5-MINUTE PRESSURE SWITCH WATCHGUARD MODE.
YES
IS VOLTAGE ABOVE 70 VOLTS?
LED FLASHES CODE 13 LOW LINE VOLTAGE.
ONCE VOLTAGE IS ABOVE 75 VOLTS, HEATING
SEQUENCE RESTARTS.
NO
YES
YES
YES
NO
NO
NO
NO
NO
NO
YES
YES
NO
NO
NO
YES
YESHAS PRIMARY LIMIT RESET TIME EXCEEDED 3 MINUTES?
LED FLASHES CODE 7 PRIMARY LIMIT OPEN. GAS VALVE,
COMB. AIR INDUCER AND INDOOR BLOW- ER OFF. LEDs SIG- NAL LIMIT SWITCH OPEN UNTIL MAIN
POWER IS INTERRUPTED OR TSTAT IS CYCLED
OFF/ON FOR 1 SEC. MINIMUM. 60MINUTE
WATCHGUARD PE- RIOD STARTS AT
TIME LIMIT CLOSES. IS 60MIN. PERIOD
COMPLETE? NO
YES
4-SECOND TRIAL FOR IGNITION. GAS VALVE OPENS. IGNITOR ENERGIZED FOR
FIRST 3 SECONDS OF THE TRIAL.
LED FLASHES CODE 10
1 HR PRESSURE SWITCH
WATCHGUARD MODE
GAS VALVE DEENERGIZED. COMBUSTION AIR INDUCER ON. INDOOR BLOWER OFF WITH
DELAY. HAS CAB PRESSURE SWITCH CLOSED WITHIN 2.5 MINUTES?
NO YES
Page 52
Troubleshooting: Cooling Sequence of Operation
COOLING SEQUENCE OF OPERATION
NORMAL COOLING MODE ABNORMAL COOLING MODE
IGNITION CONTROL MAIN POWER ON.
CONTROL SELF DIAGNOSTIC CHECK. IS CONTROL OPERATING NORMALLY?
YES
LED FLASHES CODE 1 POLARITY REVERSED CONTROL WILL CONTINUE TO CALL FOR COOLING IN
THIS CONDITION.
POWER ON
GAS VALVE OFF. COMBUSTION AIR INDUCER OFF. INDOOR BLOWER OFF WITH NORMAL DELAY.
SIGNAL CIRCUIT BOARD FAILURE AT LED. INTERRUPT MAIN POWER TO RESET CONTROL.
YES
IS POLARITY CORRECT?
ROLLOUT SWITCH MONITORED CONTINUOUSLY. IS ROLLOUT SWITCH CLOSED?
LED: SLOW FLASH RATE REMAINS UNCHANGED THROUGHOUT COOLING CYCLE.
THERMOSTAT CALLS FOR COOLING.
COMPRESSOR CONTACTOR AND SYSTEM FAN ENERGIZED WITH 2-SECOND DELAY
(COOLING SPEED). EAC TERM. ENERGIZED.
COMPRESSOR OFF.
THERMOSTAT OPENS.
SYSTEM FAN AND EAC TERM. OFF WITH 45-SECOND DELAY.
NO
NO
LED FLASHES CODE 8 ROLLOUT SWITCH OPEN. GAS VALVE OFF. COMBUSTION AIR INDUCER ON. INDOOR
BLOWER ON. SEQUENCE HOLDS UNTIL ROLLOUT SWITCH CLOSES AND MAIN POWER IS INTERRUPTED OR
THERMOSTAT IS CYCLED OFF/ON FOR 1 SEC. MINIMUM.
IS VOLTAGE ABOVE 70 VOLTS?
LED FLASHES CODE 13 LOW VOLTAGE. CONTROL WILL CONTINUE TO CALL FOR COOLING
IN THIS CONDITION.
YES
YES
NO
NO
IS THERE A PROPER GROUND?
YES
NO LED FLASHES CODE 2 IMPROPER GROUND
CONTROL WILL CONTINUE TO CALL FOR COOLING IN THIS CONDITION.
Page 53
Troubleshooting: Continuous Fan Sequence of Operation
CONTINUOUS FAN SEQUENCE OF OPERATION
LED: SLOW FLASH RATE REMAINS UNCHANGED THROUGHOUT SEQUENCE.
MANUAL FAN SELECTION MADE AT THERMOSTAT. CONTROL (G) ENERGIZES SYSTEM FAN AT FAN
SPEED. EAC TERMINAL IS ENERGIZED.
THERMOSTAT CALLS FOR HEAT (W).
THERMOSTAT CALLS FOR COOLING.
THERMOSTAT OPENS.
SYSTEM FAN SWITCHED TO COOL SPEED. EAC TERM. REMAINS ON.
THERMOSTAT OPENS.
MANUAL FAN SELECTION MADE AT THERMOSTAT. CONTROL (G) ENERGIZES SYSTEM FAN AT FAN
SPEED. EAC TERM. ENERGIZED.
NO YES
YES NO
SYSTEM FAN SWITCHES TO HEAT SPEAD AFTER 30 SECOND DELAY. EAC AND HUM TERMINAL REMAIN ON.
SYSTEM FAN CONTINUES FAN SPEED WITHOUT INTERRUPTION. EAC TERMINAL REMAIN ON.
HUM TERMINAL IS ENERGIZED WITH COMBUSTION AIR BLOWER.
HUM. TERMINAL OFF AFTER POST PURGE BY COMBUSTION AIR BLOWER. SYTEM FAN SWITCHES TO FAN SPEED AFTER BLOWER
OFF DELAY. EAC CONTINUES WITHOUT INTERRUPTION.
Repair Parts List
The following repair parts are available through Lennox dealers. When ordering parts, include the complete furnace model
number listed on the CSA nameplate Example: EL195UH045P24B01. All service must be performed by a licensed
professional installer (or equivalent), service agency, or gas supplier.
Cabinet Parts
Outer access panel
Blower access panel
Top Cap
Control Panel Parts
Transformer
Integrated control board
Door interlock switch
Blower Parts
Blower wheel
Motor
Motor mounting frame
Motor capacitor
Blower housing cutoff plate
Heating Parts
Flame Sensor
Heat exchanger assembly
Gas manifold
Combustion air inducer
Gas valve
Main burner cluster
Main burner orifices
Pressure switch
Ignitor
Primary limit control
Flame rollout switches
Page 54
StartUp & Performance Check List
Gas Supply Pressure
SUPPLY AIR
Line Voltage
GAS SUPPLY
Natural Gas LP Propane Gas
Piping Connections Tight
Leak Tested
Supply Line Pressure W.C.________
1
INTAKE / EXHAUST PIPE
All Joints Primed and Glued
Terminations Installed Properly
Pipes Supported
Condensate Trap Primed / Line Sloped
Heat Cable Installed and Operable (if applicable)
2
2
2
1
Horizontal Pipes Sloped (if applicable)
UNIT SET UP
3
4
Flter
RETURN AIR
Furnace: Model Number_______________
Serial Number_________________
3 DUCT SYSTEM
SUPPLY AIR DUCT
Sealed
Insulated (if necessary)
RETURN DUCT
Sealed
Filter Installed and Clean
Grilles Unobstructed
4 VOLTAGE CHECK
Supply Voltage _____
Electrical Connections Tight
1
Page 55
Contractors: Name_________________________Telephone_____________Checklist Completed____________________
Job Address_____________________________________Technicians Name___________________________________
1
HEATING MODE
GAS MANIFOLD PRESSURE W.C._____
COMBUSTION SAMPLE CO2%______CO PPM_______2
INDOOR BLOWER AMPS______3
TEMPERATURE RISE4
Supply Duct Temperature ________
Return Duct Temperature _ _____
Temperature Rise = ________
TOTAL EXTERNAL STATIC5
Supply External Static _______
Return External Static + ______
Total External Static = _______
CONDENSATE LINE6
Leak Free
VENT PIPE7
Leak Free
COOLING MODE
INDOOR BLOWER AMPS______3
TEMPERATURE DROP
Return Duct Temperature _________
Supply Duct Temperature _ _______
Temperature Drop = _________
4
DRAIN LINE8
Leak Free
THERMOSTAT
Adjusted and Programmed
Explained Operation to Owner
9
SUPPLY AIR
Blower Motor Amps
Duct Static
Thermostat
Gas Manifold Pressure
1
2
3
4
5
6
7
8
9
Temperatures
RETURN AIR
Combustion CO2
UNIT OPERATION
TOTAL EXTERNAL STATIC (dry coil)
Supply External Static _______
Return External Static + ______
Total External Static = _______
5
Page 56
Requirements for Commonwealth of Massachusetts
Modifications to NFPA54, Chapter 10
Revise NFPA54 section 10.8.3 to add the following re-
quirements:
For all side wall, horizontally vented, gasfueled equipment
installed in every dwelling, building or structure used in
whole or in part for residential purposes, including those
owned or operated by the Commonwealth and where the
side wall exhaust vent termination is less than seven (7)
feet above the finished grade in the area of the venting, in-
cluding but not limited to decks and porches, the following
requirements shall be satisfied:
1 INSTALLATION OF CARBON MONOXIDE DETEC-
TORS. At the time of installation of the side wall, hori-
zontally vented, gasfueled equipment, the installing
plumber or gasfitter shall observe that a hardwired
carbon monoxide detector with an alarm and battery
backup is installed on the floor level where the gas
equipment is to be installed. In addition, the installing
plumber or gasfitter shall observe that a batteryoper-
ated or hardwired carbon monoxide detector with an
alarm is installed on each additional level of the dwell-
ing, building or structure served by the side wall, hori-
zontally vented, gasfueled equipment. It shall be the
responsibility of the property owner to secure the ser-
vices of qualified licensed professionals for the instal-
lation of hardwired carbon monoxide detectors.
a In the event that the side wall, horizontally vented, gasfueled equipment is installed in a crawl space or an attic, the hardwired carbon monoxide detec- tor with alarm and battery backup may be installed on the next adjacent floor level.
b In the event that the requirements of this subdivi- sion cannot be met at the time of completion of installation, the owner shall have a period of thirty (30) days to comply with the above requirements; provided, however, that during said thirty (30) day period, a batteryoperated carbon monoxide detec- tor with an alarm shall be installed.
2 APPROVED CARBON MONOXIDE DETECTORS.
Each carbon monoxide detector as required in accor-
dance with the above provisions shall comply with
NFPA 720 and be ANSI/UL 2034 listed and IAS certi-
fied.
3 SIGNAGE. A metal or plastic identification plate shall
be permanently mounted to the exterior of the building
at a minimum height of eight (8) feet above grade di-
rectly in line with the exhaust vent terminal for the hori-
zontally vented, gasfueled heating appliance or
equipment. The sign shall read, in print size no less
than onehalf (1/2) inch in size, GAS VENT DIRECT-
LY BELOW. KEEP CLEAR OF ALL OBSTRUC-
TIONS."
4 INSPECTION. The state or local gas inspector of the
side wall, horizontally vented, gasfueled equipment
shall not approve the installation unless, upon inspec-
tion, the inspector observes carbon monoxide detec-
tors and signage installed in accordance with the pro-
visions of 248 CMR 5.08(2)(a) 1 through 4.
EXEMPTIONS: The following equipment is exempt
from 24 CMR 5.08(2)(a) 1 through 4:
1 The equipment listed in Chapter 10 entitled Equip-
ment Not Required to Be Vented" in the most current
edition of NFPA 54 as adopted by the Board; and
2 Product Approved side wall, horizontally vented, gas
fueled equipment installed in a room or structure sepa-
rate from the dwelling, building or structure used in
whole or in part for residential purposes.
MANUFACTURER REQUIREMENTS
GAS EQUIPMENT VENTING SYSTEM PROVIDED.
When the manufacturer of Product Approved side wall,
horizontally vented, gasfueled equipment provides a vent-
ing system design or venting system components with the
equipment, the instructions provided by the manufacturer
for installation of the equipment and the venting system
shall include:
1 Detailed instructions for the installation of the venting
system design or the venting system components:
and
2 A complete parts list for the venting system design or
venting system.
MANUFACTURER REQUIREMENTS
GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED.
When the manufacturer of Product Approved side wall,
horizontally vented, gasfueled equipment does not pro-
vide the parts for venting the flue gases, but identifies spe-
cial venting systems," the following requirements shall be
satisfied by the manufacturer:
1 The referenced special venting system" instructions
shall be included with the appliance or equipment
installation instructions; and
2 The special venting systems" shall be Product Ap-
proved by the Board, and the instructions for that sys-
tem shall include a parts list and detailed installation
instructions.
A copy of all installation instructions for all Product
Approved side wall, horizontally vented, gasfueled
equipment, all venting instructions, all parts lists for
venting instructions, and/or
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