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Carrier 39SR00 17 Installation Instructions PDF
Summary of Content for Carrier 39SR00 17 Installation Instructions PDF
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53390020-01 Printed in U.S.A. Form 39S-3SI Pg 1 2-18 Replaces: 39S-2SI
Installation, Start-Up and Service Instructions CONTENTS
Page SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . . . 2 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Unit Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 PRE-INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Unit Weight Calculation Procedure . . . . . . . . . . . . . . 27 Shipping Bolt and Screw Removal (39SHK Units) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Unit Suspension (39SHC/SHF/SHK and 39SM Units) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Floor Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Vibration Isolators (Field Supplied) . . . . . . . . . . . . 28 Discharge Air Arrangements (39SM Units). . . . . . . 28 MODULAR CONFIGURATIONS JOINING MODULAR SECTIONS 39SM UNIT SIZES 07-17 VERTICAL TO
HORIZONTAL CONVERSION Service Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 External Vibration Isolators . . . . . . . . . . . . . . . . . . . . . 32 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Bottom Return Economizer Package (BREP) and Horizontal Bottom Return Economizer Package (HBREP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Motorized Outside Air Damper . . . . . . . . . . . . . . . . . . 35 Mixing Box Actuator (for 39SHK and 39SM Horizontal Return Units Only) . . . . . . . . . . . . . . . . 36 MIXING BOX ACTUATOR ASSEMBLY ACTUATOR INSTALLATION Mixing Box Air Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . 38 MIXING BOX MIXED AIR SENSOR BRACKET
ASSEMBLY MIXED AND OUTSIDE AIR SENSORS
INSTALLATION Mixing Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 MIXING BOX LINKAGE INSTALLATION
(39SHK SIZES 00-03) MIXING BOX LINKAGE INSTALLATION
(SIZES 04-17) Install Sheaves on Motor and Fan Shafts. . . . . . . . 40 ALIGNMENT Install V-Belts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Water and Steam Coil Piping Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 GENERAL WATER COILS STEAM COILS Coil Freeze-Up Protection . . . . . . . . . . . . . . . . . . . . . . . 45 WATER COILS STEAM COILS INNER DISTRIBUTING TUBE STEAM COILS
Refrigerant Piping, Direct Expansion (DX) Coils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46 EXPANSION VALVE PIPING Heat Pump Bypass Kit . . . . . . . . . . . . . . . . . . . . . . . . . 47 Drain Pan Replacement . . . . . . . . . . . . . . . . . . . . . . . . 47 Coil Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Motor Stop/Start Stations . . . . . . . . . . . . . . . . . . . . . . . 53 VFD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55 Reset VFD to Factory Settings . . . . . . . . . . . . . . . . . . 58 TO RESET VFD PARAMETERS TO THE FACTORY
SETTINGS MODIFY VFD FACTORY SETTIGNS CONSTANT CFM CONTROL OPTION START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Pre-Start-Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 BUILDING ENVELOPE HEATING FLUID TEMPERATURE TEMPERATURE CONTROLS OUTSIDE AIR AND FREEZE PROTECTION DAMPER OPERATION Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 FILTERS FANS SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Fan Motor Replacement . . . . . . . . . . . . . . . . . . . . . . . . . 63 Coil Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 DETERGENT Winter Shutdown (Chilled Water Coil Only) . . . . . 65 ANTIFREEZE METHODS OF COIL PROTECTION AIR DRYING METHOD OF COIL PROTECTION PIPING Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 FILTER SECTIONS Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 MOTORS BEARINGS START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . CL-1
39SH,SV,SM,SR00-17 Indoor and Outdoor Air Handlers
2
SAFETY CONSIDERATIONS Air-handling equipment is designed to provide safe and reli-
able service when operated within design specifications. To avoid injury to personnel and damage to equipment or property when operating this equipment, use good judgment and follow safe practices as outlined below.
DANGER
Failure to follow these warnings may result in personal injury or death. NEVER enter an enclosed fan cabinet or reach into a unit while the fan is running. LOCK OPEN AND TAG the fan motor power disconnect switch before working on a fan. Take fuses with you and note removal on tag. Electric shock can cause personal injury or death. LOCK OPEN AND TAG the electric heat coil power dis- connect switch before working on or near heaters.
WARNING
Failure to follow these warnings may result in personal injury or equipment damage. CHECK the assembly and component weights to be sure that the rigging equipment can handle them safely. Note also, the centers of gravity and any specific rigging instructions. CHECK for adequate ventilation so that fumes will not migrate through ductwork to occupied spaces when weld- ing or cutting inside air-handling unit cabinet or plenum. WHEN STEAM CLEANING COILS be sure that the area is clear of personnel. DO NOT attempt to handle access covers and removable panels on outdoor units when winds are strong or gusting until you have sufficient help to control them. Make sure panels are properly secured while repairs are being made to a unit. DO NOT remove access panel fasteners until fan is com- pletely stopped. Pressure developed by a moving fan can cause excessive force against the panel which can injure personnel. DO NOT work on dampers until their operators are disconnected. BE SURE that fans are properly grounded before working on them.
CAUTION
Failure to follow these warnings may result in personal injury or equipment damage. SECURE drive sheaves with a rope or strap before work- ing on a fan to ensure that rotor cannot free-wheel. DO NOT restore power to unit until all temporary walk- ways inside components have been removed. NEVER pressurize equipment in excess of specified test pressures. PROTECT adjacent flammable material when welding or flame cutting. Use sheet metal or asbestos cloth to contain sparks. Have a fire extinguisher at hand and ready for immediate use.
INTRODUCTION
Unit Identification The 39S units are identified by the 18-digit part number listed on the serial plate. The part number describes all component, coil, motor, drive, and control selections.
For further information on unit and component identifica- tion, contact your Carrier representative for the AHUBuilder
program. Refer to the 39S Product Data catalog for more infor- mation on individual component sections. Refer to Tables 1-4 and Fig. 1-21 for component data.
3
Table 1 Physical Data 39SHK/SHC/SHF Coil and Filter Data
39SH UNIT SIZE 00 01 02 03 04 05 06 07* 09* 13* 17*
CHILLED WATER
Nominal Capacity at 400 fpm (cfm) 632 716 800 1224 1612 2000 2492 2916 3832 5500 7084 Face Area (sq ft) 1.58 1.79 2 3.06 4.03 5 6.23 7.29 9.58 13.75 17.71 Coil Connection Size (in. OD sweat)
4 Row (Qty) 3/4 3/4 3/4 3/4 7/8 11/8 13/8 11/8 13/8 13/8 15/8 (2) 6 Row (Qty) 3/4 3/4 3/4 7/8 11/8 11/8 13/8 13/8 15/8 15/8 15/8 (2)
HOT WATER
Nominal Capacity at 400 fpm (cfm) 632 716 624 956 1612 2000 2220 2688 3544 5348 6640 Face Area (sq ft) 1.58 1.79 1.56 2.39 4.03 5 5.55 6.72 8.86 13.37 16.6 Coil Connection Size (in. OD sweat)
1 Row 5/8 5/8 5/8 5/8 7/8 7/8 11/8 N/A N/A N/A N/A 2 Row (Qty) 7/8 7/8 7/8 7/8 7/8 11/8 11/8 13/8 13/8 15/8 (2) 4 Row** (Qty) 3/4 3/4 3/4 3/4 7/8 11/8 11/8 13/8 13/8 15/8 (2) 6 Row** (Qty) 3/4 3/4 3/4 7/8 11/8 11/8 13/8 15/8 15/8 15/8 (2)
DIRECT EXPANSION
Nominal Capacity at 400 fpm (cfm) 476 716 800 1224 1612 2000 2432 2864 4088 5500 6640 Face Area (sq ft) 1.19 1.79 2.00 3.06 4.03 5 6.08 7.16 10.22 13.75 16.6 Connection Size (in. OD sweat) (Qty)
Liquid Line 3/8 3/8 3/8 3/8 3/8 5/8 1/2 5/8, 1/2*** (2)
5/8, 1/2*** (2)
1/2***(2) 5/8*** (2)
Suction Line 5/8 5/8 3/4 3/4 3/4 11/8 7/8 11/8, 7/8*** (2)
13/8, 7/8*** (2)
11/8*** (2) 13/8*** (2)
STEAM
Nominal Capacity at 400 fpm (cfm) 632 716 752 1144 1452 1800 N/A 2688 3640 5512 7000 Face Area (sq ft) 1.58 1.79 1.88 2.86 3.63 4.5 6.72 9.1 13.78 17.5
FILTER DATA
2-in. Pleated MERV 8 Size (in.) (Qty)
12x25*/ 12x29
12x25*/ 12x29
16x32*/ 12x35
16x32*/ 12x35
20x20 (2)*/
18x44
20x20 (2)*/
18x44
18x44 16x32 (2) 20x32 (1)
16x32 (2) 20x32 (1)
20x25 (2) 20x20 (4)
16x20 (2) 16x25 (2) 20x20 (2) 20x25 (2)
Nominal Face Area (sq ft) 2.08/ 2.42
2.08/ 2.43 3.56/ 2.92 3.56/ 2.93 5.56/ 5.50 5.56/ 5.50 5.50 11.56 11.56 18.06 22.5
4-in. Pleated MERV 13 Size (in.) (Qty) 12x29 12x29 12x35 12x35 18x44 18x44 18x44 N/A N/A N/A N/A
Nominal Face Area (sq ft) 2.42 2.42 2.92 2.92 5.50 5.50 5.50 N/A N/A N/A N/A 12-in. HEPA Type A, 99.975%lb.,.3m Size (in.) (Qty)
12.5x25x 11.5
12.5x25x 11.5
12.5x31x 11.5
12.5x31x 11.5
18x40 x11.5
18x40 x11.5
18x40 x11.5 N/A N/A N/A N/A
Nominal Face Area (sq ft) 2.17 2.17 2.69 2.69 5.14 5.14 5.14 N/A N/A N/A N/A
* Only 39SHK. Only 39SHC, SHF. ** 4 and 6 row hot water coils have the same face area as 4 and 6 row
chilled water coils.
Single circuited coil. *** Dual circuited coil.
4
Table 2 Physical Data 39SV Coil and Filter Data
Table 3 Physical Data 39SM Coil and Filter Data
39SM UNIT SIZE 04 05 07 09 13 17
CHILLED WATER
Nominal Capacity at 400 fpm (cfm) 1668 2084 2776 3332 5000 7084
Face Area (sq ft) 4.17 5.21 6.94 8.33 12.5 17.71
Coil Connection Size (in. OD sweat)
4 Row (Qty) 7/8 11/8 11/8 13/8 13/8 15/8 (2)
6 Row (Qty) 11/8 11/8 13/8 15/8 15/8 15/8 (2)
HOT WATER
Nominal Capacity at 400 fpm (cfm) 1668 2084 2776 3332 5000 7084
Face Area (sq ft) 4.17 5.21 6.94 8.33 12.5 17.71
Coil Connection Size (in. OD sweat)
2 Row (Qty) 7/8 11/8 11/8 11/8 11/8 11/8 (2)
4 Row* (Qty) 7/8 11/8 11/8 13/8 13/8 15/8 (2)
6 Row* (Qty) 11/8 11/8 13/8 15/8 15/8 15/8 (2)
DIRECT EXPANSION
Nominal Capacity at 400 fpm (cfm) 1668 2000 2668 3332 5000 7000
Face Area (sq ft) 4.17 5 6.67 8.33 12.5 17.5
Connection Size (in. OD sweat)
Liquid Line 1/2 1/2 5/8 5/8 5/8 5/8 (2)
Suction Line 7/8 11/8 11/8 13/8 13/8 15/8 (2)
STEAM
Nominal Capacity at 400 fpm (cfm) 1492 1960 2472 3028 4752 6700
Face Area (sq ft) 3.73 4.9 6.18 7.57 11.88 16.75
FILTER DATA
Size (in.) (Qty) 20x25 (2) 20x25 (2) 16x25 (4) 16x25 (4) 16x20 (2) 20x20 (2) 16x25 (2) 20x25 (2)
16x20 (2) 20x20 (2) 16x25 (2) 20x25 (2)
Nominal Face Area (sq ft) 6.94 6.94 11.11 11.11 22.5 22.5
* 4 and 6 row hot water coils have the same face area as 4 and 6 row chilled water coils.
39SV UNIT SIZE 02 03 04 05 07 09
CHILLED WATER
Nominal Capacity at 400 fpm (cfm) 1200 1200 1600 2000 2932 3668
Face Area (sq ft) 3 3 4 5 7.33 9.17
Coil Connection Size (in. OD sweat) 3/4 3/4 7/8 11/8 11/8 13/8
HOT WATER
Nominal Capacity at 400 fpm (cfm) 804 804 964 1276 2292 3124
Face Area (sq ft) 2.01 2.01 2.41 3.19 5.73 7.81
Coil Connection Size (in. OD sweat) 7/8 7/8 7/8 11/8 11/8 11/8
DIRECT EXPANSION
Nominal Capacity at 400 fpm (cfm) 1200 1200 1600 2000 2932 3668
Face Area (sq ft) 3 3 4 5 7.33 9.17
Connection Size (in. OD sweat) (Qty)
Liquid Line 3/8 3/8 1/2 1/2 5/8 1/2 (2)
Suction Line 3/4 3/4 7/8 11/8 11/8 7/8 (2)
STEAM
Nominal Capacity at 400 fpm (cfm) 624 624 688 1268 1750 2452
Face Area (sq ft) 1.56 1.56 1.72 3.17 4.375 6.13
FILTER DATA
Size (in.) (Qty) 20x20 20x20 22.5x22.5 16x25 (2) 20x25 (4) 20x25 (4)
Nominal Face Area (sq ft) 2.78 2.78 3.52 5.56 13.89 13.89
5
Table 4 Physical Data 39SR Coil and Filter Data
* 4 and 6 row hot water coils have the same face area as 4 and 6 row chilled water coils.
39SR UNIT SIZE 02 03 04 05 07 09 13 17
CHILLED WATER
Nominal Capacity at 400 fpm (cfm) 800 1224 1612 2000 3252 3792 5124 7000 Face Area (sq ft) 2 3.06 4.03 5 8.13 9.48 12.81 17.5 Coil Connection Size (in. OD sweat)
4 Row 3/4 3/4 7/8 11/8 13/8 13/8 13/8 13/8 6 Row 3/4 7/8 11/8 11/8 15/8 15/8 15/8 15/8
HOT WATER
Nominal Capacity at 400 fpm (cfm) 624 956 1612 2000 3252 3792 5124 7000 Face Area (sq ft) 1.56 2.39 4.03 5 8.13 9.48 12.81 17.5 Coil Connection Size (in. OD sweat)
2 Row 5/8 7/8 7/8 11/8 11/8 11/8 13/8 11/8 4 Row* 3/4 3/4 7/8 11/8 13/8 13/8 13/8 13/8 6 Row* 3/4 7/8 11/8 11/8 15/8 15/8 15/8 15/8
DIRECT EXPANSION
Nominal Capacity at 400 fpm (cfm) 800 1224 1612 2000 3252 3792 5124 7000 Face Area (sq ft) 2 3.06 4.03 5 8.13 9.48 12.81 17.5 Connection Size (in. OD sweat) (Qty)
Liquid Line 3/8 3/8 1/2 1/2 5/8 5/8 7/8 (2) 7/8 (2) Suction Line 3/4 3/4 7/8 11/8 11/8 13/8 13/8 (2) 15/8 (2)
STEAM
Nominal Capacity at 400 fpm (cfm) 752 1144 1452 1800 3088 3576 4956 6768 Face Area (sq ft) 1.88 2.86 3.63 4.5 7.72 8.94 12.39 16.92
FILTER DATA
Single Wall Unit, Throwaway Filter Size (in.) (Qty) 16x32 16x32 20x20 (2) 20x20 (2) 16x25 (4) 16x25 (4) 16x20 (3)
16x25 (3) 16x20 (4) 16x25 (4)
Nominal Face Area (sq ft) 3.56 3.56 5.56 5.56 11.11 11.11 15 20
Single Wall Unit, Pleated Filter Size (in.) (Qty) 16x32 16x32 20x24 (1)
16x20 (1) 20x24 (1) 16x20 (1)
16x25 (4) 16x25 (4) 16x20 (3) 16x25 (3)
16x20 (4) 16x25 (4)
Nominal Face Area (sq ft) 3.56 3.56 5.56 5.56 11.11 11.11 15 20 Double Wall Unit, Pleated and Throwaway Filters
Size (in.) (Qty) 16x32 (1)
10x10 (3)
16x32 (1)
10x10 (3)
12x25 (1) 12x20 (1) 16x20 (1) 16x25 (1)
12x25 (1) 12x20 (1) 16x20 (1) 16x25 (1)
25x25 (2) 20x25 (2)
25x25 (2) 20x25 (2)
16x24 (3) 29x48 (1)
16x20 (4) 16x32 (4)
Nominal Face Area (sq ft) 5.64 5.64 8.75 8.75 15.63 15.63 17.67 23.11
DIMENSIONS (in.)
LEGEND
* C1 dimension is for standard unit. C2 dimension is for double-wall units. Sizes 13 and 17 are twin blowers. Dimension E is to closest blower. Dimensions F and G are typical for both fan outlets. NOTES: 1. Dimensions shown in inches. 2. Unit hand is determined by looking into the filters in same direction as airflow. Right hand unit shown for reference.
39SHK UNIT SIZE
UNIT OUTLINE BLOWER OPENING OUTLET RETURN DUCT CONNECTION
A B C1* C2* D E F G H K L M N P
00,01 38.0 28.0 14.1 15.1 1.0 9.6 8.6 10.6 1.0 22.0 12.3 1.6 2.6 3.3
02,03 37.1 36.6 18.1 19.0 1.0 14.1 8.4 10.6 1.0 27.6 16.4 1.5 1.5 2.9
04 42.0 45.0 22.1 23.0 1.0 17.9 9.1 13.8 1.0 36.0 20.0 1.5 1.5 2.7
05 42.0 45.0 22.1 23.0 1.0 14.3 12.5 13.8 1.0 36.0 20.0 1.5 1.5 2.7
07,09 52.5 57.0 34.8 34.8 1.0 21.8 13.4 16.2 9.1 48.0 32.2 2.8 2.8 2.8
13 57.5 67.2 43.0 43.0 N/A 11.4 16.4 (2)
16.4 (2) 8.0 57.9 40.4 3.7 3.7 3.7
17 57.5 72.3 48.0 48.0 N/A 14.0 16.4 (2)
16.4 (2) 13.0 66.0 45.7 3.7 3.7 3.7
BTM Bottom KO Knockout w/o MSS Without Motor Start/Stop Station
Airflow
Top View
Left Side View
FILTER
Front View
Rear View
L
K
Motor Start/Stop Station (opt)
12.51
H
B
C1-2*
F
G
E
8.12
A
6.35
DD
.875 Power Conn. (w/o MSS)
3/4" FPT Drain Conn.
(TYP) P
KO (TYP) (TOP/BTM)
.875(OPP SIDE)
.875
M (TYP)
(TYP)
Power Conn.
N
.875 24V Control Conn.
39SHK UNIT
6
Fig. 1 39SHK Unit
DIMENSIONS (in.)
NOTES: 1. 39SHK unit shown for reference. 2. Not all components shown for clarity. 3. Optional actuator shown for reference. 4. Dimensions shown in inches.
39SHK UNIT SIZE
LENGTH WIDTH (CENTERED)
HEIGHT (CENTERED)
DUCT WIDTH
DUCT HEIGHT
TOP CLEARANCE
APPROX. SHIPPING WEIGHT
FILTERS
A B C D E F lb Size Qty
00,01 22.1 22.1 12.3 20.4 7.6 2.0 40 14x20x2 2
02,03 27.0 27.7 16.4 25.9 11.6 2.0 90 16x25x2 2
04,05 27.0 36.2 20.4 34.3 15.0 2.0 140 16x32x2 2
07,09 32.0 48.2 32.4 46.3 15.0 9.7 200 20x24x2 4
13 36.0 58.0 40.3 56.0 16.0 13.2 260 20x25x2 16x25x2
4 2
17 40.0 66.2 45.0 64.3 16.0 15.5 320 30x20x2 6
a39-4121
AIRFLOW
RIGHT VIEWREAR VIEW
BOTTOM VIEW
39SHK UNIT
D
A
3.2 TYP.
C
E
E
B
D
F
7
Fig. 2 39SHK Mixing Box
ISOMETRIC VIEW
TOP VIEW (SERVICE CLEARANCE SHOWN)
E 14 OR 16
14.1 OR 19.0
F (SEE NOTE 3)
36.0
18.0
ELECTRIC HEAT SERVICE CLEARANCE
TOP VIEW
C
D
FRONT VIEW RIGHT VIEW a39-4485
DUCT CONNECTION
HEATER PLENUM
HEATER CONTROL BOX
A IR
F LO
W
HEATER PLENUM
HEATER CONTROL BOX
B
J-BOX A
CONDUIT
39SHK UNIT
DIMENSIONS (in.)
NOTES: 1. Dimensions shown in inches. 2. Unit with right-hand electric heat is shown for reference. Left hand unit is similar,
but with control box on opposite side. 3. Dimension F will be 11.5 in. if dimension E is 14 in., or 14 in. if dimension E is 16 in.
39SHK UNIT SIZE
HEATER PLENUM HEATER CONTROL BOX
A B C D
00,01 8.6 10.6 5.5 14.0
02,03 8.6 10.6 5.5 17.0
04 9.3 13.9 5.5 17.0
05 12.6 13.9 5.5 21.0
07,09 13.4 16.2 5.5 23.0
8
Fig. 3 39SHK Electric Heat
TOP VIEW
RIGHT VIEW
FRONT VIEW
DOOR SWING
DOOR SWING
(TYP BOTH SIDES) (TYP BOTH SIDES)
11.7 G
F
(RETURN AIR OPENING)
A
B
AIRFLOW CONTROL ENTRY
MOTOR/BLOWER ACCESS
UNIT POTENTIOMETER/ VFD KEY PAD
AUX 3/4 FPT DRAIN CONNECTION
POWER ENTRY
3/4 FPT DRAIN CONNECTION
C
MERV8 MERV13
A
D
EDIMENSIONS (in.)
NOTES: 1. Dimensions shown in inches. 2. Unit potentiometer may be relocated by others in field. 3. Coil connections shown for reference only.
39SHC UNIT SIZE A B C D E F G
00, 01 33.2 70.4 22 17.8 18.1 21 15.8
02, 03 39.2 70.4 22 23.8 18.1 27 15.8
04, 05 48.2 74.4 28 32.8 24.1 36 19.8
06 48.2 74.4 28 32.8 24.1 36 19.8
9
Fig. 4 39SHC Unit
RIGHT VIEW
TOP VIEW
FRONT VIEW
DOOR SWING
(TYP BOTH SIDES) DOOR SWING
(TYP BOTH SIDES)
(TYP BOTH SIDES)
DOOR SWING
CONTROL ENTRYHEPA FILTER GAUGE/ PRESSURE PORTS (OPT)
AIRFLOW
POWER ENTRY HEPA
MOTOR/BLOWER ACCESS
UNIT POTENTIOMETER/ VFD KEY PAD
AUX 3/4 FPT DRAIN CONNECTION
3/4 FPT DRAIN CONNECTION
MERV8 MERV13
E C
11.7 H G
E
A
D
F
(RTN AIR OPENING)
A
B
A39-4595.eps
DIMENSIONS (in.)
NOTES: 1. Dimensions shown in inches. 2. Unit potentiometer may be relocated by others in field. 3. Coil connections shown for reference only.
39SHF UNIT SIZE A B C D E F G H
00,01 33.2 93.4 22 17.8 18.1 21 15.8 18.5
02,03 39.2 93.4 22 23.8 18.1 27 15.8 18.5
04,05 48.2 97.5 28 32.8 24.1 36 19.8 18.6
06 48.2 97.5 28 32.8 24.1 36 19.8 18.6
10
Fig. 5 39SHF Unit
4 x 4 JBOX (w/o MSS)
F
G
D
12.5
B
E 6.3
1.9
Right View
8.2 2.5
.875 24V Control
Conn.
.875 (OPP SIDE) Power Conn.
Motor Start/Stop (MSS) (optional)
Conn.
Liquid Conn. (DX)
Front View
Supply Conn. (CW)
Top View
Supply Conn. (HW) Return (HW) Conn.
Return (CW) Suction (DX)/
Cond Drain w/ Aux (3/4" FPT)
C
A 0.81.5
DIMENSIONS (in.)
LEGEND
NOTE: Measurements shown in inches.
39SV UNIT SIZE
WIDTH DEPTH HEIGHT SUPPLY DUCT CONNECTION SIZES (OD)
A B C D E F G CW
SUPPLY- RETURN
HW SUPPLY- RETURN
DX LIQUID-
SUCTION 02 22.3 24.0 50.0 6.9 8.5 3.0 11.8 3/4 - 3/4 7/8 - 7/8 3/8 - 3/4 03 22.3 24.0 50.0 6.9 8.5 3.0 11.8 3/4 - 3/4 7/8 - 7/8 3/8 - 3/4 04 25.1 24.3 56.5 8.0 9.1 1.6 13.9 7/8 - 7/8 7/8 - 7/8 1/2 - 7/8 05 29.5 26.0 59.5 8.4 12.6 1.3 13.9 1 1/8 - 1 1/8 1 1/8 - 1 1/8 1/2 - 1 1/8
CW Chilled Water JBOX Junction Box DX Direct Expansion MSS Motor Start/Stop Station HW Hot Water w/o Without
11
Fig. 6 39SV Unit Sizes 02-05 Pre-Heat
4 x 4 JBOX (w/o MSS)
F
G
D
12.5
B
E 6.3
1.9
Right View
8.2 2.5
.875 24V Control
Conn.
.875 (OPP SIDE) Power Conn.
Motor Start/Stop (MSS) (optional)
Conn.
Liquid Conn. (DX)
Front View
Supply Conn. (CW)
Top View
Supply Conn. (HW) Return (HW) Conn.
Return (CW) Suction (DX)/
Cond Drain w/ Aux (3/4" FPT)
C
A 0.81.5
DIMENSIONS (in.)
LEGEND
NOTE: Dimensions shown in inches.
39SV UNIT SIZE
WIDTH DEPTH HEIGHT SUPPLY DUCT CONNECTION SIZES (OD)
A B C D E F G CW Supply-Return
HW Supply-Return
DX Supply-Return
02 22.3 24.0 50.0 6.9 8.5 3.0 11.8 3/4 - 3/4 7/8 - 7/8 3/8 - 3/4 03 22.3 24.0 50.0 6.9 8.5 3.0 11.8 3/4 - 3/4 7/8 - 7/8 3/8 - 3/4 04 25.1 24.3 56.5 8.0 9.1 1.6 13.9 7/8 - 7/8 7/8 - 7/8 1/2 - 7/8 05 29.5 26.0 59.5 8.4 12.6 1.3 13.9 1 1/8 - 1 1/8 1 1/8 - 1 1/8 1/2 - 1 1/8
CW Chilled Water MSS Motor Start/Stop Station DX Direct Expansion w/o Without HW Hot Water
12
Fig. 7 39SV Unit Size 02-05 Pre-Heat
LEGEND
NOTES: 1. Unit section lifting lugs (shipped loose) for lifting sections only. Do not use lifting lugs for lifting
unit assembly. Top lifting lugs may be removed after unit is secured at job site. 2. All sections shall be shipped loose and field installed by customer. 3. Dimensions shown in inches.
CW Chilled Water MSS Motor Start/Stop Station HW Hot Water w/o Without JBOX Junction Box
a39-4486
13
Fig. 8 39SV Unit Size 07 Pre-Heat
LEGEND
NOTES: 1. Unit section lifting lugs (shipped loose) for lifting sections only. Do not use lifting lugs for lifting
unit assembly. Top lifting lugs may be removed after unit is secured at job site. 2. All sections shall be shipped loose and field installed by customer. 3. Dimensions shown in inches.
DX Direct Expansion JBOX Junction Box MSS Motor Start/Stop Station w/o Without
a39-4487
14
Fig. 9 39SV Unit Size 09 Pre-Heat
a39-4488
LEGEND
NOTES: 1. Unit section lifting lugs (shipped loose) for lifting sections only. Do not use lifting lugs for lifting unit assembly.
Top lifting lugs may be removed after unit is secured at job site. 2. All sections shall be shipped loose and field installed by customer. 3. Dimensions shown in inches.
DX Direct Expansion JBOX Junction Box MSS Motor Start/Stop Station w/o Without
15
Fig. 10 39SV Unit Size 07 Re-Heat
LEGEND
NOTES: 1. Unit section lifting lugs (shipped loose) for lifting sections only. Do not use lifting lugs for lifting
unit assembly. Top lifting lugs may be removed after unit is secured at job site. 2. All sections shall be shipped loose and field installed by customer. 3. Dimensions shown in inches.
CW Chilled Water MSS Motor Start/Stop Station HW Hot Water w/o Without JBOX Junction Box
a39-4489
16
Fig. 11 39SV Unit Size 09 Re-Heat
A
D
C
B
E F
a39-4491
(See Note 3) 12 or 14
DIMENSIONS (in.)
NOTES: 1. Dimensions shown in inches. 2. Heater footprint is totally contained within the 39SV unit footprint. 3. Dimension F will be 14 in. if dimension E is 12 in., or 16 in. if dimension E is 14 in.
39SV UNIT SIZE HEATER CONTROL BOX HEATER PLENUM
A B C D
02,03 5.5 20.0 8.8 12.1
04 5.5 22.0 9.3 14.1
05 5.5 24.0 13.1 14.4
07,09 5.5 24.0 13.6 16.5
17
Fig. 12 39SV Field-Installed Electric Heat
AIR
FILTERS FLOW
MOTOR START/STOP (MSS)
(OPT)
H
I
A
K
J
12.51
6.35
VIEWREAR VIEW
SIZES 04-09
RIGHT
TOP VIEW
CONTROL CONN.
O
.875 24V
L
M
O
N
POWER CONN. .875 (OPP SIDE)
O
M
L O
L
N
ACCESS PANEL
C
S
AREA
E
SUPPLY AREA
C
RETURN
S
F I L T E R
A
CW/HW
CW/HW
3/4" FPT DRAIN
G
B
P
.98 C
8.18
F
R
Q
.95
D
E JBOX (W/O MSS)
.875 POWER CONN. 4X4
TOP VIEW SIZES 13, 17
(HEIGHT: 1.2)
DIMENSIONS (in.)
LEGEND
NOTES: 1. Dimensions shown in inches. 2. Hand connections are defined by looking at the filters in the direction of airflow. 3. Coil section and blower ship separately and are installed by others. 4. Blower section may be rotated 180 degrees to relocate supply duct. 5. See Fig. 24 for 39SM modular configurations.
39SM UNIT SIZE
WIDTH HEIGHT DEPTH COIL SECTION
BLOWER SECTION
MOTOR START/STOP
(OPT.) RETURN DUCT SUPPLY DUCT
(BLOWER OPENING) SUPPLY CONN.
RETURN CONN. DRAIN
A B C D E F G H I J K L M N O P Q R
04 40.0 53.5 26.0 27.5 26.0 2.8 9.0 36.0 25.5 1.0 2.0 13.6 11.9 1.1 13.1 3.6 20.0 15.2
05 40.0 53.5 26.0 27.5 26.0 2.8 9.0 36.0 25.5 1.0 2.0 13.6 11.9 1.1 13.1 3.6 25.0 15.2
07 50.0 68.5 34.0 34.5 34.0 6.8 13.0 48.0 32.0 1.0 1.0 13.4 16.2 1.2 18.3 3.6 25.0 22.5
09 50.0 68.5 34.0 34.5 34.0 6.8 13.0 48.0 32.0 1.0 1.0 13.4 16.2 1.2 18.3 3.6 30.0 22.5
13 72.0 81.5 34.0 47.5 34.0 6.7 13.0 66.0 45.0 2.0 6.0 16.4 16.4 1.1 14.0 3.6 30.0 23.0
17 72.0 81.5 34.0 47.5 34.0 6.7 13.0 66.0 45.0 2.0 6.0 16.4 16.4 1.1 14.0 3.6 42.6 23.0
CW Chilled Water HW Hot Water JBOX Junction Box w/o MSS Without Motor Start/Stop Station
18
Fig. 13 39SM Unit Sizes 04-17 (Vertical Configuration)
DIMENSIONS (in.)
LEGEND
NOTES: 1. Dimensions shown in inches. 2. Hand connections are defined by looking at the filters in the direction of airflow. 3. Coil section and blower ship separately and are installed by others. 4. Blower section may be rotated 180 degrees to relocate supply duct. 5. See Fig. 24 for 39SM modular configurations.
39SM UNIT SIZE
WIDTH HEIGHT DEPTH COIL SECTION
BLOWER SECTION
MOTOR START/STOP
(OPT.) RETURN DUCT SUPPLY DUCT
(BLOWER OPENING) SUPPLY CONN.
RETURN CONN. DRAIN
A B C D E F G H I J K L M N O P Q R
04 40.0 27.5 52.0 27.5 26.0 2.7 8.9 36.0 25.5 1.0 2.0 13.6 11.9 1.1 13.1 3.6 20.0 15.2
05 40.0 27.5 52.0 27.5 26.0 2.7 8.9 36.0 25.5 1.0 2.0 13.6 11.9 1.1 13.1 3.6 25.0 15.2
07 50.0 34.5 68.0 34.5 34.0 6.8 12.9 48.0 32.0 1.0 1.0 13.4 16.2 1.2 18.3 3.6 25.0 22.5
09 50.0 34.5 68.0 34.5 34.0 6.8 12.9 48.0 32.0 1.0 1.0 13.4 16.2 1.2 18.3 3.6 30.0 22.5
13 72.0 47.5 68.0 47.5 34.0 6.7 12.9 66.0 45.0 1.0 2.9 16.4 16.4 1.1 14.0 3.6 30.0 23.0
17 72.0 47.5 68.0 47.5 34.0 6.7 12.9 66.0 45.0 1.0 2.9 16.4 16.4 1.1 14.0 3.6 42.6 23.0
CW Chilled Water HW Hot Water JBOX Junction Box w/o MSS Without Motor Start/Stop Station
19
Fig. 14 39SM Unit Sizes 04-17 (Horizontal Configuration)
DIMENSIONS (in.)
NOTES: 1. Dimensions shown in inches. 2. 39SM unit shown for reference only. 3. Not all components shown for clarity. 4. Optional actuator not shown. 5. Top and rear inlets shown. Bottom and rear inlets are also available. 6. See Fig. 24 for 39SM modular configurations.
39SM UNIT SIZE
LENGTH WIDTH HEIGHT DUCT WIDTH
DUCT HEIGHT
TOP CLEARANCE FILTERS
A B C D E F SIZE QTY
04, 05 27.0 36.2 25.5 34.3 15.0 2.0 16 x 32 x 2 2
07, 09 32.0 48.2 32.4 46.3 15.0 9.7 20 x 24 x 2 4
13, 17 40.0 66.2 45.0 64.3 16.0 15.5 30 x 20 x 2 6
20
Fig. 15 39SM Unit Mixing Box
M
C
B
L
P
HORIZONTAL DISCHARGE (OPT)
G
F
NO
A
4.0
H
D F
G
J K
E
4.0
4.0
DIMENSIONS (in.)
NOTE: Dimensions shown in inches.
39SR UNIT SIZE A B C D E F G H J K L M N O P
02, 03 67.4 39.6 22.5 12.0 25.8 11.9 8.9 11.0 8.0 35.4 14.2 28.4 2.5 15.3 5.6 04, 05 72.1 48.1 28.5 12.0 34.0 14.1 13.1 11.0 8.0 35.6 18.2 35.8 5.1 17.5 6.2 07, 09 75.0 53.0 42.2 14.0 44.0 16.4 12.1 15.0 8.0 37.2 24.3 46.0 10.1 20.5 3.5
13 75.1 53.0 55.7 14.0 44.0 16.4 19.4 15.0 8.0 37.3 32.7 46.0 23.5 16.8 3.5 17 96.0 76.3 53.3 15.0 62.0 19.6 22.0 15.0 8.0 50.3 47.0 68.2 17.4 27.1 4.1
21
Fig. 16 39SR Unit Single Wall
L
M
C
B
P
A
3.0
4.0
G
4.0
F
D
K
H
J
E
HORIZONTAL DISCHARGE (OPT)
G
F
NO
DIMENSIONS (in.)
NOTES: 1. Dimensions shown in inches. 2. L1 dimension is for horizontal or bottom return economizer package option. 3. L2 dimension is for fixed air or motorized outside air damper package option.
39SR UNIT SIZE A B C D E F G H J K L1 L2 M N O P
02, 03 70.0 42.0 30.5 12.0 26.0 11.9 8.9 10.0 6.0 33.7 17.2 14.2 28.1 8.5 16.6 7.0 04, 05 70.4 50.5 33.6 12.0 34.0 14.1 13.4 10.0 6.0 38.9 21.2 18.2 36.1 4.2 18.6 7.2 07, 09 77.4 55.5 50.9 14.0 44.0 16.4 13.1 15.0 8.0 38.0 35.1 24.3 45.9 19.9 21.2 4.8
13 77.4 55.5 60.6 14.0 44.0 16.4 18.9 15.0 8.0 38.0 48.9 32.8 45.9 29.7 18.3 4.8 17 96.5 76.5 64.1 14.0 62.0 19.0 22.0 15.0 8.0 51.9 48.2 46.9 65.8 24.0 27.3 5.4
22
Fig. 17 39SR Unit Double Wall
B
A
F
Outdoor Air Hood
Return Air Duct
G
D
E
C
DIMENSIONS (in.)
39SR UNIT SIZE A B C D E F G 02, 03 30.6 19.9 26.1 2.0 7.7 26.2 17.9 04, 05 39.9 18.0 25.0 1.8 9.9 35.9 22.1
23
Fig. 18 39SR Unit Sizes 02-05 Horizontal Return Economizer Package
E F
Return Air
Outdoor Air
C
D
A
B
DIMENSIONS (in.)
39SR UNIT SIZE A B C D E F 02, 03 32.100 18.940 42.075 17.260 25.950 16.150 04, 05 39.725 22.825 44.025 21.125 27.750 16.250
24
Fig. 19 39SR Unit Sizes 02-05 Bottom Return Economizer Package
E
H
conversion) (remove for HBREP
Barometric Relief Damper
Outdoor Air Hood
G
F
B (HBREP)
A (HBREP)
J
DIMENSIONS (in.)
39SR UNIT SIZE A B E F G H J 07, 09 13.8 44.1 35.2 34.9 15.4 16.5 48.3
13 18.8 44.1 39.0 48.6 20.1 20.0 48.3 17 19.0 62.9 43.4 45.1 20.1 20.0 66.1
LEGEND HBREPHorizontal Return Economizer Package
25
Fig. 20 39SR Unit Sizes 07-17 Bottom and Horizontal Return Economizer Package
C
D
E
F
ROTATING DAMPER ASSEMBLY
H G
A
B
REAR ISOMETRIC VIEW
ACTUATOR (OPT)
FRONT ISOMETRIC VIEW
TRANSFORMER (OPT)
MOAD DIMENSIONS (in.)
39SR UNIT SIZE A B C D E F G H
02, 03 29.9 19.1 8.7 5.6 24.1 2.9 13.4 10.4 04, 05 37.8 23.5 14.6 5.6 25.3 6.3 17.3 13.8 07, 09 48.8 28.4 17.4 5.6 44.4 2.2 21.8 19.6
13 48.8 34.9 22.3 5.6 40.5 4.1 28.3 25.8 17 30.3 46.8 25.0 5.6 25.2 2.5 38.9 31.8
LEGEND MOAD Motorized Outside Air Damper
26
Fig. 21 39SR Unit Sizes 02-17 Motorized Outside Air Damper
27
PRE-INSTALLATION 1. Check items received against packing list. 2. Do not stack unit components or accessories during stor-
age. Stacking can cause damage or deformation. 3. If unit is to be stored for more than 2 weeks prior to in-
stallation, observe the following precautions: a. Choose a dry storage site that is reasonably level
and sturdy to prevent undue stress or permanent damage to the unit structure or components. Do not store unit on vibrating surface. Damage to station- ary bearings can occur. Set unit off ground if in heavy rain area.
b. Remove all fasteners and other small parts from jobsite to minimize theft. Tag and store parts in a safe place until needed.
c. Cover entire unit with a tarp or plastic coverall. Extend cover under unit if stored on ground. Secure cover with adequate tiedowns or store indoors. Be sure all coil connections have protec- tive shipping caps.
d. Monthly Remove tarp from unit, enter fan section through access door or through fan inlet, and rotate fan and motor slowly by hand to redis- tribute the bearing grease and to prevent bearing corrosion.
Rigging Do not remove shipping skids or protective covering until unit is ready for final placement. Use slings and spreader bars as applicable to lift unit. Do not lift unit by coil connections or headers.
Do not remove protective caps from coil piping connections until ready to connect piping.
Do not remove protective cover or grease from fan shaft un- til ready to install sheave.
Lay rigid temporary protection such as plywood walkways in unit to prevent damage to insulation or bottom panel during installation.
Unit Weight Calculation Procedure Calculate coil water weight for each water coil using the following for- mula:
Water Weight = Coil Volume (gal) x 8.345 lb/gal (vol- ume is from Physical Data table) Calculate Total Weight: Total Unit Installed Weight = Unit Dry Weight (see Table 5) + Water Weight (coil 1) + Water Weight (coil 2)
Table 5 39SHC/SHF Unit Dry Weight
Shipping Bolt and Screw Removal (39SHK Units) On 39SHK units ensure that all red shipping bolts and screws are removed and all other bolts and screws are tight. The red hold-down shipping bolts are located on both sides of the blower/motor mounting rails and are acces- sible through the side access panels. The red sheet metal screws are located on the discharge duct collar. All red bolts and
screws must be removed for the blower assembly to be isolated from the cabinet. See Fig. 22.
Fig. 22 Shipping Bolt and Screw Removal
Unit Suspension (39SHC/SHF/SHK and 39SM Units) Acceptable forms of unit suspension are shown in Fig. 23. A field-supplied platform mount is recom- mended, especially for larger unit sizes. Units can also be sup- ported by suspending the unit from crossbeams at the joint be- tween each unit component. Since the 39SM units lack a base- rail, support members should also be placed along the airway length of the unit in order to prevent buckling. Ensure that sus- pension rods are secured to adequately support the unit and that the rods extend entirely through their associated fasteners.
All 39SH units have 7/8 in. knockouts in each corner of their top and base panels for suspension rods to pass through, locat- ed 31/2 in. in from the corners on the center line. It is recom- mended that an angle iron or Unistrut* framing system be used under the unit for support (these support pieces should extend approximately 1 in. beyond each end of the unit width). NOTE: Hanging brackets (shipped loose) are recommended for 39SHK and 39SM unit sizes 07 and above. To install brackets, place in approximate location and use self-drilling screws to attach to mixing box. Brackets are sized to allow hanging from the Unistrut framing system. The Unistrut framing system should be cut to the length one to two inches shorter than the width of the mixing box to avoid any interference with the damper linkages. NOTE: Locate suspension rods so they do not block access panels or interfere with the electrical, mechanical, or drain functions of unit.
Floor Mounting Unit may be mounted on a house- keeping pad, floor or platform.
CAUTION
Make sure to allow enough elevation to permit construc- tion of the condensate trap. Failure to follow this caution may result in unit damage.
UNIT WEIGHTS
Size Cabinet Dry Weight (lbs)
00/01 39SHC 503
39SHF 772
02/03 39SHC 516
39SHF 785
04-06 39SHC 880
39SHF 1085
*Unistrut is a registered trademark of Unistrut International Corporation.
28
Vibration Isolators (Field Supplied) If re- quired, install isolators in the suspension rod system. Allow clearance as needed between isolators and unit.
VIBRATION ISOLATORS (FIELD SUPPLIED)
CEILING RECOMMENDED PLATFORM MOUNT
CEILING ALTERNATE SUSPENSION RODS WITH NO MOUNT
Fig. 23 Unit Suspension
Discharge Air Arrangements (39SM Units) MODULAR CONFIGURATIONS The unit is shipped in two sections for easier handling and smaller clearances. The two sections are manufactured and shipped to be joined in one of the specific configurations shown in Fig. 24. If ordered
incorrectly, the sections may be field-modified to achieve one of the other configurations indicated in Fig. 24.
IMPORTANT: Deviating from the factory-designed configurations shown in Fig. 24 may result in improper or unacceptable operation including inadequate airflow, fan vibration, fan noise, or condensate carryover (blow- off).
BLOWER: VERTICAL COIL: UPFLOW
BLOWER: HORIZONTAL COIL: UPFLOW
BLOWER: VERTICAL COIL: DOWNFLOW
BLOWER: HORIZONTAL COIL: DOWNFLOW
BLOWER: VERTICAL COIL: HORIZONTAL
BLOWER: HORIZONTAL COIL: HORIZONTAL
a39-4492
VERTICAL CONFIGURATIONS
HORIZONTAL CONFIGURATIONS
Fig. 24 39SM Modular Configurations
NOTES: 1. Arrows indicate airflow direction. 2. Diagrams indicate general arrangement of coil and
blower sections. Refer to dimensional drawings for details and connections.
29
JOINING MODULAR SECTIONS
NOTE: 39SM unit sizes 04 and 05 are single-section units and require no joining. 39SM Unit Sizes 07-17 (Vertical Configurations) 1. Remove red shipping screws from duct flange/blower
outlet before assembly. See Fig. 25.
IMPORTANT: Failure to remove red shipping screws can result in unsatisfactory vibration or blower noise, or excessive air recirculation.
2. Use factory-provided foam gasket tape to seal the joint between the sections.
NOTE: Gasket material is factory-provided unless the orientation of the unit is being changed from that ordered. In
that case, use field-provided gasket or factory-provided gas- ket kit. 3. Stack sections in vertical orientation. See Fig. 24. Sec-
tions must be installed in one of the vertical configura- tions shown in Fig. 24. Be sure to orient the blower sec- tion to match the selected configuration as shown in Fig. 24.
4. Remove access panel. See Fig. 26. 5. Install 4 (2 on each side) self-drilling sheet metal screws
no. 10 x 3/4 in. long through the end panel flange into the coil section flange (Fig. 27).
6. Re-install access panel. 7. When coil section is on top of fan section, drive screws
from coil section into fan section.
Fig. 25 Remove Red Shipping Screws
NOTE: There may by one or 2 blower discharges. Single discharge shown.
ACCESS PANEL
Fig. 26 Remove Access Panel
Fig. 27 Connect Sections with Screws
8 in. (203.2 mm) TYP FROM FRONT AND REAR PANELS
#10 x 3/4 in. SELF-TAP SCREW (TYP)
#10 x 3/4 in. SELF-TAP SCREW (TYP)
30
39SM Unit Sizes 07-17 (Horizontal Configurations) 1. Remove red shipping screws from duct flange/blower
outlet before assembly. See Fig. 25.
IMPORTANT: Failure to remove red shipping screws can result in unsatisfactory vibration or blower noise, or excessive air recirculation.
2. Use factory-provided foam gasket tape to seal the joint between the sections.
NOTE: Gasket material is factory-provided unless the ori- entation of the unit is being changed from that ordered. In that case, use field-provided gasket or factory-provided gas- ket kit. 3. Remove coil section side panels and blower section ac-
cess panels. See Fig. 28. 4. Align coil and blower sections in the correct orientation,
as shown in the appropriate horizontal configuration in Fig. 24.
5. Drill flanges and install 3/8-16 x 1 in. long bolts, flat washers and locknuts as shown in Fig. 27. Unit sizes 07 and 09 require 2 bolts per side (4 total). Unit sizes 13 and 17 require 3 bolts per side (6 total).
6. Reinstall side and access panels.
ADD CENTER BOLT (3/8 - 16 x 1 in. HX. HD.) ON UNIT SIZES 13,17
SIDE PANEL
SIDE PANEL
COIL SECTION
3/8 - 16 x 1 in. HX. HD. BOLTS (UNIT SIZES 13,17)
3/8 - 16 x 1 in. HX. HD. BOLTS (UNIT SIZES 13,17)
4 in. (TYP) FROM TOP AND BOTTOM EDGES
3/8 in. (MIN.) THREADED ROD (FIELD-SUPPLIED)
BOTTOM SUPPORTS (FIELD-SUPPLIED)
BLOWER ACCESS PANEL
BLOWER SECTION
REMOVE RED SHIPPING SCREWS
Fig. 28 Connect Sections (Horizontal Configurations)
31
39SM UNIT SIZES 07-17 VERTICAL TO HORIZON- TAL CONVERSION Unit is shipped in one of the con- figurations shown in Fig. 24. It is possible to change the config- uration to another shown in Fig. 24 using the following proce- dure: 1. Remove the front panel by removing the panel screws. 2. Remove the 2 side panels by removing the panel screws. 3. Rotate the blower section so that the opening is aligned
with the front of the coil section. See Fig. 29. If desired, relocate motor mounting rails, plate, and motor to alter- nate location for easier service access.
IMPORTANT: The final configuration must match one of the permitted arrangements shown in Fig. 24.
4. Insert gasket kit or field-provided gasket material be- tween the coil section and the blower section and fasten with bolts as required. See Fig. 29.
5. Replace the 2 side panels in their original locations. 6. Insert a suitable gasket material around the top flanged
opening and place what was the front panel on the top of the unit (shaded panel in Fig. 30). Fasten with screws.
Fig. 29 Align Blower Section Opening with Coil Section Front
Fig. 30 Assembled in Horizontal Configuration
NOTE: Dark shaded panel is original front panel, now on top of unit.
32
Service Clearance Provide adequate space for unit service access (fan shaft and coil removal, filter removal, mo- tor access, damper linkage access, etc.).
Condensate Drain To prevent excessive build-up of condensate in drain pan, adequate trap clearance (trap depth) must be provided beneath the unit as indicated in Fig. 31. See Installation, Condensate Drain section for additional details.
CAUTION
RECOMMMENDED: 39SHC, 39SHF, and 39SV units have an auxiliary condensate drain which should be piped to a condensate overflow sensor or safe drain location or both. Failure to follow this warning may cause damage to equipment and property in the case of condensate overflow. In addition, the International Mechanical Code (IMC) sec- tion 307.2.3 requires the use of auxiliary drain pans. Many municipalities have adopted this code. Carrier holds that this practice represents the standard for professional instal- lation whether or not this code has been adopted in a spe- cific municipality or territory. As such, water damages that would have been prevented had an auxiliary pan been deployed will not be considered for compensation. This position is taken regardless of whether the source of the moisture was specified as a potential failure mode in the applicable building code or not. A freeze burst, cracked drain pan, failed weld, or corrosion induced leak are some of the potential failure modes that are mitigated when an auxiliary pan is properly installed. Professional installers recognize the value of protecting customer assets against foreseeable events. Customers who choose to avoid the cost of common protective measures waive their right to seek damages when those foreseeable events occur. If the product is located above a living space or where damage may result from condensate overflow, install a watertight pan of corrosion-resistant metal beneath the unit to catch over-flow which may result from clogged drains or from other reasons. Provide proper drain piping for this auxiliary pan. Consult local codes for additional precautions before installation.
FAN OFF
TRAP CONDITION WHEN FAN STARTS
FAN RUNNING AND CONDENSATE DRAINING
DIFFERENTIAL 1
DRAIN NIPPLE
DIFFERENTIAL 2
COOLING COIL DRAIN PAN
H
Fig. 31 Condensate Drain
External Vibration Isolators Install vibration isolators per certified drawings, and in accordance with the job specifications and the instructions of the vibration isolator manufacturer. The coil piping must be isolated or have a flexi- ble connection to avoid coil header damage because of unit motion. A flexible connection should be installed at the fan discharge.
Figure 23 shows isolation locations for overhead suspension of unit.
INSTALLATION
Condensate Drain Install a trapped condensate drain line at unit drain connection. All 39S units have a 3/4 in. FPT condensate drain connection.
Measure maximum design negative static pressure up- stream from the fan. Referring to Fig. 31, height H must be equal to or larger than negative static pressure at design operat- ing conditions. Prime enough water in trap to prevent losing seal (Differential 1). When the fan starts, Differential 2 is equal to the maximum negative static pressure.
Provide freeze-up protection as required.
Bottom Return Economizer Package (BREP) and Horizontal Bottom Return Economizer Package (HBREP) (39SR Unit) Economizers are used with 39SR units for automatic sensor-controlled introduc- tion of outdoor air into the system through an electro-mechani- cally controlled damper.
To install BREP: 1. Check for correct number of parts shown in Fig. 32 and
the following list. 1 Economizer assembly 1 Barometric relief hood 1 Outdoor air hood 1 Hardware bag
2. Disconnect all power to unit.
Fig. 32 Bottom Return Economizer Package (BREP) for Sizes 07-17
33
3. Remove return air access panel from unit and rear access panel(s) if applicable as shown in Fig. 33.
4. To assemble the barometric relief hood, the following will be needed. See Fig. 34. 30 Screws (type A no. 10 - 16 x 1/2 in.) 1 15 ft gasket (1/8 in. x 1/2 in.) 1 15 ft gasket (1/8 in. x 3/4 in.) a. Take hood bottom and left hood panel, putting the
flange of hood bottom to the inside of left hood panel and screw into place.
b. Take right hood panel and screw in place like Step a.
c. Take top rail and place flanges over left hood panel and right hood panel and secure.
d. Take top panel and do the same as Step c. e. Take 1/8 in. x 3/4 in. gasket and place around perim-
eter of front panel to seal between damper section and hood.
f. Take front panel and slide inside of left hood panel and right hood panel and secure.
g. Set barometric relief hood to the side for use later. 5. To assemble the outside air hood, the following will be
needed. See Fig. 35. 20 Screws (type A no. 10 - 16 x 1/2 in.) 1 15 ft gasket (1/8 in. x 1/2 in.) a. Take hood bottom and left hood panel, putting the
flange of hood bottom to the inside of left hood panel and screw into place.
b. Place 1/8 in. x 1/2 in. gasket on flanges on hood bot- tom, left hood panel, right hood panel, and top panel that attach to the face of the economizer when installed.
c. Take right hood panel and screw in place like Step a.
Fig. 33 Remove Access Panel(s) from Unit
Fig. 34 Assemble Barometric Relief Hood
d. Take top rail and place flanges over left hood panel and right hood panel and secure.
e. Take side rail and line up to holes in left hood panel and secure.
f. Repeat Step d for side rail and right hood panel. g. Take front panel and slide inside of side rails. h. Take top panel and do the same as Step d. i. Place 1/8 in. x 1/2 in. gasket on flanges on hood bot-
tom, left hood panel, right hood panel, and top rail that attach to the face of the economizer when installed.
j. Set outside air hood to the side for use later. 6. As shown in Fig. 36, slide economizer assembly into unit
over return opening, but DO NOT insert completely into unit. Connect low and high voltage wiring to the terminal block and transformer per wiring diagram shown in Fig. 37.
Fig. 35 Assemble Outside Air Hood Fig. 36 Slide Economizer Assembly into Unit
Fig. 37 Modulating Gear Economizer with Relief for Sizes 07-17 BREP Units
NOTES: 1. Unit wiring shown as reference only. Check unit wiring for actual unit wiring. 2. Relays 1K and 2K actuate when the outdoor air enthalpy is higher than the return air enthalpy. 3. 1S is an electronic switch that closes when powered by a 24 VAC input. 4. Factory-installed resistor should be removed only if C7400 differential enthalpy sensor is added.
34
7. To install barometric hood: For bottom return applications: Take the barometric hood and secure to economizer using screws as shown in Fig. 38. For horizontal return applications: a. Connect field-installed horizontal return ductwork
to duct flange. Ensure that bottom return on unit is capped.
b. Install barometric hood over exhaust opening in field-installed ductwork. For exhaust and
horizontal return opening sizes see duct flange dimensions in Fig. 39.
8. Install the outside air hood. The upper flange of the hood should rest against the top of the economizer. See Fig. 40.
9. Apply 1/8 x 1/2 in. gasketing along mounting flanges. Slide economizer assembly fully into unit and secure with the supplied no. 10-16 x 1/2 screws. See Fig. 41.
10. Replace all panels and restore power to the unit.
BAROMETRIC RELIEF HOOD
Fig. 38 Install Barometric Relief Hood
Fig. 39 39SR Unit Duct Flange Dimensions for Horizontal Return Applications
39SR UNIT SIZE
DUCT FLANGE DIMENSION (in.) A B
07, 09 13.75 44.25 13 18.75 44.25 17 19.00 63.00
Fig. 40 Install Outside Air Hood
Fig. 41 Slide Economizer into Unit
35
Motorized Outside Air Damper To install the motorized outside air damper: 1. Check for correct number of parts shown in Fig. 42 and
the following list. 1 Hood top 2 Hood sides 2 Filter channels 1 Filter 1 Filter access panel 1 Door panel with outside air slide 1 Adapter panel (provided if necessary) 1 Hardware bag
2. To assemble outdoor air hood (shown in Fig. 43): a. Secure the filter channels to the hood sides using
the supplied no. 10-16 x 1/2 screws. b. Place the hood sides to the inside of the side flange
of the hood top and secure with the supplied no. 10-16 x 1/2 screws.
c. Slide the filter inside the filter channels. d. Place the filter access panel over the hood side
panels and secure with no. 10-16 x 1/2 screws. 3. Adjust the position of the outside air slides on the door
panel to determine the amount of fresh air provided to the unit. See Fig. 42.
4. After the slides are in the desired position, secure the outdoor air hood to the door panel using the provided no. 10-16 x screws as shown in Fig. 43.
5. Remove the return air access panel from unit and the rear access panel(s) if applicable as shown in Fig. 44.
6. Locate the adapter panel (provided if necessary). Position the adapter panel at the top of the return air access panel under the rooftop unit top panel. Secure the adapter panel to the rooftop unit using the supplied no. 10-16 x 1/2 screws as shown in Fig. 45.
7. Center the door panel over the return-air access opening. 8. Align the holes in the top and bottom of the door panel to
the holes in the rooftop unit. Secure the door panel to the unit using the provided no. 10-16 x 1/2 screws as shown in Fig. 46.
Fig. 42 Motorized Outside Air Damper
Fig. 43 Assemble the Outside Air Hood
Fig. 44 Remove Access Panel(s) from Unit
Fig. 45 Secure Adapter Panel to Unit
Fig. 46 Secure Door Panel to Unit
36
Mixing Box Actuator (for 39SHK and 39SM Horizontal Return Units Only) MIXING BOX ACTUATOR ASSEMBLY (Fig. 47 and 48) To assemble the mixing box actuator: 1. Press logic module onto actuator. 2. Remove lock nut from swivel nut assembly. Place swivel
nut assembly into slot on actuator arm. Hand tighten lock nut onto swivel nut assembly. Swivel nut assembly will need to be adjusted once installed for proper actuator motion.
3. Attach actuator arm assembly to actuator with four 1/4-in. screws. Arm may need to be repositioned once installed to ensure proper actuator motion.
Fig. 47 Actuator Assembly
Fig. 48 Assembled Actuator
37
ACTUATOR INSTALLATION To install the actuator: 1. Align actuator so that the actuator linkage arm will have
enough clearance for full range of motion. Refer to Fig. 49-52. Align center line of the actuator as close to the centerline of DR4 as possible. See Fig. 51 and 52. Use at least 4 self-drilling screws to mount directly to top of unit.
2. Place linkage arm assembly (linkage arm and swivel nut arm) onto DR4 as shown in Fig. 51 and 52. Do not tight- en to DR4 as adjustments need to be made.
3. Place linkage rod between actuator arm and linkage arm on DR4. See Fig. 51. Linkage rod may need to be cut to length. Ensure actuator arm and linkage arm are parallel.
4. Ensure linkage assemblies are properly secured as shown in the linkage assembly instructions sent with the unit.
5. Open one set of dampers to 100% open and the other to 100% closed. Ensure actuator motion will operate as needed and tighten all linkages, swivel assemblies, and linkage rods into place.
6. Ensure actuator motion opens and closes damper assem- blies fully. If not, adjust settings of linkage arm, actuator arm, swivel nut assemblies, and linkage rods one at a time until full operation is achieved.
DOOR (HIDDEN)
HORIZONTAL RETURN
B
AVERTICAL RETURN
Fig. 49 Actuator Installation Front View
Fig. 50 Actuator Installation Side View
LINKAGE ARM
LINKAGE ROD
DR4
DR3
DR2
DR1
Fig. 51 Area A Detailed View
Fig. 52 Area B Detailed View
38
Mixing Box Air Sensor MIXING BOX MIXED AIR SENSOR BRACKET ASSEMBLY To assemble the mixed air sensor bracket assembly to the mixing box, attach mixed air sensor to mixed air sensor bracket. See Fig. 53.
Fig. 53 Mixed Air Sensor Bracket
MIXED AND OUTSIDE AIR SENSORS INSTALLATION 1. Remove access panel and filters as needed. 2. Place mixed air sensor assembly in airstream as shown in
Fig. 54. 3. Attach to top of unit with self drilling screws. 4. Drill or knockout 1/2 in. hole into top of mixing box close
to actuator as shown in Fig. 54. 5. Insert snap bushing in hole. Run wires inside unit, along
top of mixing box, between the filter rail and insulation, and attach to mixed air sensor.
6. Place enthalpy sensor, shown in Fig. 55, in location suit- able to meet manufacturer's requirements.
7. Connect all sensors to logic module per manufacturer's instructions.
8. Test to ensure proper function. 9. Replace all parts and tape or fill any holes or gaps made.
MIXED AIR SENSOR ASSEMBLY
HOLE LOCATION
Fig. 54 Mixed Air Sensor Installation
Fig. 55 Enthalpy Sensor
Mixing Box To install mixing box: 1. Insert rear return duct flanges of unit into opening of
mixing box. 2. Ensure all unit flanges are inside the opening of the mix-
ing box and screw a minimum of three screws into each of the units four flanges using self-drilling screws.
3. The mixing box should now hang freely from the unit. 4. Remove unit filters from unit before start-up.
MIXING BOX
HANGING BRACKETS (1 in. DIA.) UNIT FILTER
ACCESS DOOR
39SHK UNIT
Fig. 56 Installing Mixing Box
MIXING BOX LINKAGE INSTALLATION (39SHK Unit Sizes 00-03) To install the mixing box linkage assembly (sizes 00-03): 1. Check for correct number of parts:
1 Linkage rod 2 Linkage arms 2 Swivel joints
NOTE: A 7/16 in. box end wrench and/or socket will be needed for linkage installation.
2. Attach actuator (optional item) to unit with actuator mounting hardware included with actuator. Actuator should be mounted on damper rod 1 (DR1) as shown in Fig. 57.
3. Orientate actuator to avoid interference with linkage assembly.
4. Ensure dampers are fully closed or open depending on application, and secure actuator to shaft. Actuator should open and close dampers fully. Adjust actuator as needed.
5. Place a linkage arm onto DR1 and DR2. See Fig. 57 and 58 for proper positioning. Ensure that swivel joints are fully extended to the end of the linkage arm and tighten.
6. Insert linkage rod into swivel joints and tighten. Linkage rod may need to be cut down to size. Linkage arms should be parallel.
7. Ensure one set of dampers are fully open and the other fully closed. Adjust linkage assembly to allow travel without interference and tighten to DR1 and DR2.
39
8. The actuator should now be able to power the dampers fully open and fully closed without interference. Adjust linkage assemblies as needed.
HORIZONTAL RETURN
ACTUATOR (OPTIONAL)
LINKAGE ARM
DR2
DR1
LINKAGE ROD
VERTICAL RETURN
Fig. 57 Linkage Assembly Front View (Sizes 00-03)
Fig. 58 Linkage Assembly Side View (Sizes 00-03)
MIXING BOX LINKAGE INSTALLATION (Sizes 04- 17) To install the mixing box linkage assembly (sizes 04-17): 1. Check for correct number of parts:
3 Linkage rods 6 Linkage arms 6 Swivel joints
NOTE: A 7/16 in. box end wrench and/or socket will be needed for linkage installation.
2. An alternate field-supplied actuator may be installed directly on the damper shaft if required. If a factory- supplied actuator is ordered for the mixing box, refer to Mixing Box Actuator section on page 36.
3. Orientate actuator to avoid interference with linkage assembly. Refer to Fig. 59 and 60.
4. Ensure dampers are fully closed or open depending on application, and secure actuator to shaft. Actuator should open and close dampers fully. Adjust actuator as needed.
5. Place a linkage arm onto DR3 and DR2. See Fig. 61 and 62 for proper positioning. Ensure that swivel joints are fully extended to the end of the linkage arm and tighten.
Fig. 59 Linkage Assembly Front View (Sizes 04-17)
Fig. 60 Linkage Assembly Side View (Sizes 04-17)
6. Insert linkage rod into swivel joints and tighten. Linkage rod may need to be cut down to size. Linkage arms should be parallel. Assembly should still be loose on damper rods. This will be linkage assembly no. 1.
7. Place linkage arm onto DR1 and DR2. Ensure swivel joints are fully extended to the end of the linkage arm and tighten.
8. Insert linkage rod into swivel joints and tighten. Linkage rod may need to be cut down to size. Linkage arms should be parallel.
9. Ensure dampers are fully open or closed and tighten link- age arms to damper rods. Linkage assembly should be able to open and close dampers fully without interference. Adjust accordingly.
10. Place linkage arm onto DR3 and DR4. Ensure swivel joints are fully extended to the end of the linkage arm and tighten.
11. Insert linkage rod into swivel joints and tighten. Linkage rod may need to be cut down to size. Linkage arms should be parallel.
12. Ensure dampers are fully open or closed and tighten link- age arms to damper rods. Linkage assembly should be able to open and close dampers fully without interference. Adjust accordingly.
13. Ensure one set of dampers is fully open and the other ful- ly closed. Adjust linkage assembly no. 1 to allow travel without interference and tighten to DR2 and DR3.
14. The actuator should now be able to power the dampers fully open and fully closed without interference. Adjust linkage assemblies as needed.
DR4
ACTUATOR (OPTIONAL)
DR3
DR1
DR2
LINKAGE ARM
LINKAGE ROD
Fig. 61 Area A Detailed View
Fig. 62 Area B Detailed View
40
Install Sheaves on Motor and Fan Shafts Factory-supplied drives are prealigned and tensioned, however, Carrier recommends that the belt tension and alignment be checked before starting the unit. Always check the drive align- ment after adjusting belt tension.
When field installing or replacing sheaves, install sheaves on fan shaft and motor shaft for minimum overhang. (See Fig. 63.) Use care when mounting sheave on fan shaft; too much force may damage bearing. Remove rust-preventative coating or oil from shaft. Make sure shaft is clean and free of burrs. Add grease or lubricant to bore of sheave before installing.
ALIGNMENT Make sure that fan shafts and motor shafts are parallel and level. The most common causes of mis- alignment are nonparallel shafts and improperly located sheaves. Where shafts are not parallel, belts on one side are drawn tighter and pull more than their share of the load. As a result, these belts wear out faster, requiring the entire set to be replaced before it has given maximum service. If misalignment is in the sheave, belts will enter and leave the grooves at an angle, causing excessive belt cover and sheave wear. 1. Shaft alignment can be checked by measuring the
distance between the shafts at 3 or more locations. If the distances are equal, then the shafts will be parallel.
2. Check alignment of sheaves: Fixed sheaves To check the location of the fixed sheaves on the shafts, a straightedge or a piece of string can be used. If the sheaves are properly lined up the string will touch them at the points indicated by the arrows in Fig. 64. Adjustable sheave To check the location of adjustable sheave on shaft, make sure that the centerlines of both sheaves are in line and parallel with the bearing support channel. See Fig. 64. Adjustable pitch drives are installed on the motor shaft.
CAUTION
With adjustable sheave, do not exceed maximum fan rpm. Failure to follow these instructions may result in equipment damage.
3. Rotating each sheave a half revolution will determine whether the sheave is wobbly or the drive shaft is bent. Correct any misalignment.
Fig. 63 Determining Sheave-Shaft Overhang
41
4. With sheaves aligned, tighten cap screws evenly and progressively. NOTE: There should be a 1/8-in. to 1/4-in. gap between the mating part hub and the bushing flange. If gap is closed, the bushing is probably the wrong size.
5. With taper-lock bushed hubs, be sure the bushing bolts are tightened evenly to prevent side-to-side pulley wob- ble. Check by rotating sheaves and rechecking sheave alignment.
Fig. 64 Sheave Alignment
Install V-Belts When installing or replacing belts, al- ways use a complete set of new belts. Mixing old and new belts will result in the premature wear or breakage of the newer belts. 1. Always adjust the motor position so that V-belts can be
installed without stretching over grooves. Forcing belts can result in uneven stretching and a mismatched set of belts.
2. Do not allow belt to bottom out in sheave. 3. Tighten belts by turning motor-adjusting jackscrews.
Turn each jackscrew an equal number of turns. 4. Equalize belt slack so that it is on the same side of belt for
all belts. Failure to do so may result in uneven belt stretching.
5. Tension new drives at the maximum deflection force recommended (Fig. 65).
6. To determine correct belt tension, use the deflection formula given below and the tension data from Fig. 65 as follows: EXAMPLE: Given Belt Span 16 in. Belt Cross-Section A, Super Belt Small Sheave Pitch Diameter 5 in.
Deflection = (Belt Span)
64
Solution 1. From Fig. 65 find that deflection force for type A, super
belt with 5-in. small sheave pitch diameter is 4 to 51/2 lb.
Deflection = 16 64
2.
3. Increase or decrease belt tension until force required for 1/4-in. deflection is 51/2 lb. Check belt tension at least twice during first operating day. Readjust as required to maintain belt tension within the recommended range.
42
With correct belt tension, belts may slip and squeal momentarily on start up. This slippage is normal and disap- pears after unit reaches operating speed. Excessive belt tension shortens belt life and may cause bearing and shaft damage.
After run-in, set belt tension at lowest tension at which belts will not slip during operation.
PD Pitch Diameter, inches
Fig. 65 Fan Belt Tension Data
BELT CROSS
SECTION
SMALL SHEAVE
PD RANGE (in.)
DEFLECTION FORCE LB Super Belts
Notch Belts
Steel Cable Belts
Min Max Min Max Min Max
A 3.0- 3.6 3 41/4 37/8 51/2 3 4 3.8- 4.8 31/2 5 41/2 61/4 33/4 43/4 5.0- 7.0 4 51/2 5 67/8 41/4 51/4
B 3.4- 4.2 4 51/2 53/4 8 41/2 51/2 4.4- 5.6 51/8 71/8 61/2 91/8 53/4 71/4 5.8- 8.6 63/8 83/4 73/8 101/8 7 83/4
C 7.0- 9.4 111/4 143/8 133/4 177/8 111/4 14 9.6-16.0 141/8 181/2 151/4 201/4 141/4 173/4
3V 2.65-3.65 31/2 5 37/8 51/2 4.12-6.90 43/4 67/8 51/4 77/8
5V 4.40-6.70 10 15 7.1-10.9 101/2 153/4 127/8 183/4 11.8-16.0 13 191/2 15 22
8V 12.5-17.0 27 401/2 18.0-22.4 30 45
Water and Steam Coil Piping Recommendations GENERAL Use straps around the coil casing to lift and place the coil.
CAUTION
To prevent damage to the coil or coil headers: Do not use the headers to lift the coil. Support the piping and coil con- nections independently. Do not use the coil connections to support piping. When tightening coil connections, use a backup wrench on the nozzles.
Piping practices are outlined in the Carrier System Design Manual, Part 3, Piping Design. WATER COILS Typically, coils are piped by connecting the supply at the bottom and the return at the top. This is not al- ways the case, especially if the coil hand has been changed in the field. Coils must be piped for counterflow; otherwise, a ca- pacity reduction of 5% for each coil row will result. To ensure
counterflow, chilled water coils are piped so that the coldest water meets the coldest air. Hot water coils are piped so that the warmest water meets the warmest air. Some 39S coils have 3 connections on either side of the coil (for a total of 6 connec- tions). In these cases, the middle connection is used as the re- turn connection. See Fig. 66.
Fig. 66 Water Coil Connection
LEGEND CW Chilled Water HW Hot Water LH Left Hand RH Right Hand
STEAM COILS Position the steam supply connection at the top of the coil, and the return (condensate) connection at the bottom.
Figure 67 illustrates the normal piping components and the suggested locations for high, medium, or low-pressure steam coils. The low-pressure application (zero to 15 psig) can dispense with the -in. petcock for continuous venting located above the vacuum breaker (check valve).
Note the horizontal location of the 15-degree check valve, and the orientation of the gate/pivot. This valve is intended to relieve any vacuum forming in the condensate outlet of a condensing steam coil, and to seal this port when steam pressure is again supplied to the coil. It must not be installed in any other position, and should not be used in the supply line.
For coils used in tempering service, or to preheat outside air, install an immersion thermostat in the condensate line ahead of the trap. This will shut down the supply fan and close the out- door damper whenever the condensate falls to a predetermined point, perhaps 120F. NOTE: Do NOT use an immersion thermostat to override a duct thermostat and open the steam supply valve.
For vacuum return systems, the vacuum breaking check valve would be piped into the condensate line between the trap and the gate valve instead of open to the atmosphere.
Figure 68 illustrates the typical piping at the end of every steam supply main. Omitting this causes many field problems and failed coils.
Figure 69 shows the typical field piping of multiple coils. Use this only if the coils are the same size and have the same pressure drop. If this is not the case, an individual trap must be provided for each coil.
Figure 70 shows a multiple coil arrangement applied to a gravity return, including the open air relief to the atmosphere, which DOES NOT replace the vacuum breakers.
Figure 71 illustrates the basic condensate lift piping.
NOTE
CONTROL VALVE (NOTE 3)
STRAINER
GATE VALVE
STEAM SUPPLY MAIN
*
15 CHECK VALVE FOR BREAKING VACUUM
1/2 in. LINE
NOTE 112 in. MIN.
DIRT LEG (6)
15 CHECK VALVE
FLOAT OR BUCKET TRAP (NOTE 2)
GATE VALVE
CONDENSATE RETURN MAIN
1/4 in. PET COCK FOR CONTINUOUS VENT
UNIT
*When end of supply main, see Fig 68 NOTES:
1. Flange or union is located to facilitate coil removal. 2. Flash trap may be used if pressure differential between steam
and condensate return exceeds 5 psi. 3. When a bypass with control is required. 4. Dirt leg may be replaced with a strainer. If so, tee on drop can
be replaced by a reducing ell. 5. The petcock is not necessary with a bucket trap or any trap
which has provision for passing air. The great majority of high or medium pressure returns end in hot wells or de-aerators which vent the air.
Fig. 67 Low, Medium or High Pressure Coil Piping
NOTES: 1. A bypass is necessary around trap and valves when continu-
ous operation is necessary. 2. Bypass to be the same size as trap orifice but never less than
1/2 inch.
Fig. 68 Dripping Steam Supply to Condensate Return
*
*Refer to Fig. 68 when dripping steam supply main to condensate supply. NOTES:
1. Flange or union is located to facilitate coil removal. 2. When a bypass with control is required. 3. Flash trap can be used if pressure differential between supply
and condensate return exceeds 5 psi. 4. Coils with different pressure drops require individual traps. This
is often caused by varying air velocities across the coil bank. 5. Dirt leg may be replaced with a strainer. If so, tee on drop can
be replaced by a reducing ell. 6. The petcock is not necessary with a bucket trap or any trap
which has provision for passing air. The great majority of high pressure return mains terminate in hot wells or de-aerators which vent the air.
Fig. 69 Multiple Coil High Pressure Piping
43
*
*Refer to Fig. 68 when dripping supply to return. NOTES:
1. Flange or union is located to facilitate coil removal. 2. When control valve is omitted on multiple coils in parallel air
flow. 3. When a bypass with control is required. 4. Coils with different pressure drops require individual traps. This
is often caused by varying air velocities across the coil bank.
Fig. 70 Multiple Coil Low Pressure Piping Gravity Return
NOTES: 1. Flange or union is located to facilitate coil removal. 2. To prevent water hammer, drain coil before admitting steam. 3. Do not exceed one foot of lift between trap discharge and
return main for each pound of pressure differential. 4. Do not use this arrangement for units handling outside air.
Fig. 71 Condensate Lift to Overhead Return
44
45
Following the piping diagrams in Fig. 67-71, make all con- nections while observing the following precautions: Install a drip line and trap on the pressure side of the inlet
control valve. Connect the drip line to the return line downstream of the return line trap.
To prevent scale or foreign matter from entering the con- trol valve and coil, install a 3/32-in. mesh strainer in the steam supply line upstream from the control valve.
Provide air vents for the coils to eliminate non-condens- able gases.
Select a control valve according to the steam load, not the coils supply connection size. Do not use an oversized control valve.
Do not use bushings that reduce the size of the header return connection. The return connection should be the same size as the return line and reduced only at the downstream trap.
To lift condensate above the coil return line into over- head steam mains, or pressurized mains, install a pump and receiver between the condensate trap and the pressurized main. Do not try to lift condensate with modulating or on-and-off steam control valves. Use only 15-degree check valves, as they open with a lower water head. Do not use 45-degree or vertical-lift check valves.
Use float and thermostatic traps. Select the trap size according to the pressure difference between the steam supply main and the return main.
Load variations can be caused by uneven inlet air distri- bution or temperature stratification.
Drain condensate out of coils completely at the end of the heating season to prevent the formation of acid.
Coil Freeze-Up Protection WATER COILS If a chilled water coil is applied with out- side air, provisions must be made to prevent coil freeze-up. Install a coil freeze-up thermostat to shut down the system if any air temperature below 36F is encountered entering the water coil. Follow thermostat manufacturers instructions.
When a water coil is applied downstream of a direct- expansion (DX) coil, a freeze-up thermostat must be installed between the DX and water coil and electrically interlocked to turn off the cooling to prevent freeze-up of the water coil.
For outdoor-air application where intermittent chilled water coil operation is possible, one of the following steps should be taken: Install an auxiliary blower heater in cabinet to maintain
above-freezing temperature around coil while unit is shut down.
Drain coils and fill with an ethylene glycol solution suit- able for the expected cold weather operation. Shut down the system and drain coils. See Service section, Winter Shutdown.
STEAM COILS When used for preheating outdoor air in pressure or vacuum systems, an immersion thermostat to con- trol outdoor-air damper and fan motor is recommended. This control is actuated when steam supply fails or condensate tem- perature drops below an established level, such as 120 to 150F. A vacuum breaker should also be used to equalize coil pressure with the atmosphere when steam supply throttles close. Steam should not be modulated when outdoor air is be- low 40F.
On low-pressure and vacuum steam-heating systems, the thermostat may be replaced by a condensate drain with a ther- mal element. This element opens and drains the coil when con- densate temperature drops below 165F. Note that condensate drains are limited to 5 psig pressure. INNER DISTRIBUTING TUBE STEAM COILS The inner distributing tube (IDT) steam coil used in the 39S
air-handling units has an inner tube pierced to facilitate the dis- tribution of the steam along the tube's length. The outer tubes are expanded into plate fins. The completed assembly includes the supply and condensate header and side casings which are built to slant the fin/tube bundle back toward the condensate header. The slanting of the assembly ensures that condensate will flow toward the drains. This condensate must be removed through the return piping to prevent premature failure of the coil. The fin/tube bundle is slanted vertically for horizontal air- flow coils, and horizontally for vertical airflow coils. IDT Steam Coil Piping The following piping guidelines will contribute to efficient coil operation and long coil life: 1. Use full size coil outlets and return piping to the steam
trap. Do not bush return outlet to the coil. Run full size to the trap, reduce at the trap.
2. Use float and thermostatic (F & T) traps only for conden- sate removal. Trap size selection should be based on the difference in pressure between the steam supply main and the condensate return main. It is good practice to select a trap with 3 times the condensate rating of the coil to which it is connected.
3. Use thermostatic traps for venting only. 4. Use only 1/2-in., 15-degree swing check valves installed
horizontally, piped open to atmosphere, and located at least 12 in. above the condensate outlet. Do not use 45-degree, vertical lift and ring check valves.
5. The supply valve must be sized for the maximum antici- pated steam load.
6. Do not drip steam mains into coil sections. Drip them on the pressure side of the control valve and trap them into the return main beyond the trap for the coil.
7. Do not use a single trap for two or more coils installed in series. Where two or more coils are installed in a single bank, in parallel, the use of a single trap is permissible, but only if the load on each coil is equal. Where loads in the same coil bank vary, best practice is to use a separate trap for each coil. Variation in load on different coils in the same bank may be caused by several factors. Two of the most common are uneven airflow distribution across the coil and stratifi- cation of inlet air across the coil.
8. Do not try to lift condensate above the coil return into an overhead main, or drain into a main under pressure with a modulating or on/off steam control valves. A pump and receiver should be installed between the coil condensate traps and overhead mains and return mains under pres- sure.
9. Use a strainer (3/32-in. mesh) on the steam supply side, as shown in the piping diagrams, to avoid collection of scale or other foreign matter in the inner tube distributing orifices.
NOTE: IDT coils must be installed with the tubes draining toward the header end of the coil. The IDT steam coils are pitched toward the header end as installed in the unit. 10. Ensure the AHU (air-handling unit) is installed level to
maintain the inherent slope. Also ensure the unit is in- stalled high enough to allow the piping to be installed cor- rectly, especially the traps which require long drip legs.
11. Do not fail to provide all coils with the proper air vents to eliminate noncondensable gasses.
12. Do not support steam piping from the coil units. Both mains and coil sections should be supported separately.
IDT Steam Coil Installation Refer to drawings to position the coils properly with regard to the location of the supply and return connections. Ensure that the IDT coil is pitched with the tubes draining toward the header. The AHUs provide proper coil pitch when the AHU is installed level.
46
Refer to schematic piping diagrams and piping connection notes for the recommended piping methods.
Refrigerant Piping, Direct-Expansion (DX) Coils Direct-expansion coils are divided into 1 or 2 splits depending upon the unit size and coil circuiting. Each split re- quires its own distributor nozzle, expansion valve, and suction piping. Suction connections are on the air entering side when the coil is properly installed. Matching distributor connections for each coil split are on the air leaving side. See unit label or certified drawing to assure connection to matching suction and liquid connections.
The lower split of face split coils should be first on, last off. Row split coils utilize special intertwined circuits; either
split of these row split coils can be first on, last off.
CAUTION
Direct-expansion coils are shipped pressurized with dry nitrogen. Release pressure from each coil split through valves in protective caps before removing caps. Do not leave piping open to the atmosphere unnecessarily. Water and water vapor are detrimental to the refrigerant system. Until the piping is complete, recap the system and charge with nitrogen at the end of each workday. Clean all piping connections before soldering joints. Failure to follow these procedures could result in personal injury or equipment damage.
SUCTION PIPING Connect suction piping as shown in Fig. 72 for face split coil.
TXV Thermostatic Expansion Valve
Fig. 72 Face Split Coil Suction Line Piping Suction line from coil connection to end of the 15-diameter-
long riser should be same tube size as coil connection to ensure proper refrigerant velocity.
Refer to Carrier System Design Manual, Part 3, and size re- maining suction line to compressor for a pressure drop equiva- lent to 2.0F. This will provide a total suction line header pres- sure drop equivalent to approximately 2.5F. Refer to Fig. 73 for piping risers to the compressor.
To minimize the possibility of flooded starts and compres- sor damage during prolonged light load operation, install an
accumulator in the suction line or a solenoid in the liquid line of last-on, first off split in row-split applications.
Fig. 73 Suction Line Riser Piping
EXPANSION VALVE PIPING Distributor nozzles and expansion valves sized for acceptable performance for a range of conditions are factory supplied. Use the AHU (air-handling unit) selection program in the electronic catalog to select opti- mal nozzle sizes.
Circuiting selection should result in a circuit loading of 0.8 to 2.0 tons per circuit at design load. Circuit loading must be evaluated at minimum load to ensure that it does not drop below 0.6 tons per circuit. Solenoid valves may be used, if nec- essary, to shut off the refrigerant supply to individual expansion valves to maintain adequate coil circuit loading.
Compressor minimum unloading and TXV quantity is nec- essary to determine minimum tonnage per circuit.
Minimum Unloading Equation:
(Tons per Circuit) x (Minimum Unloading) x (Total no. of TXVs) no. of TXVs Active
Example: Condensing Unit: . . . . . . . . . . . . . . . . . . . . . . . . . . . .38ARS012 Minimum Unloading: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33% Coil: . . . . . . . . . . . . . . . . . . . . . . . . . 6 row, 11 FPI, Half Circuit Coil Tons per Circuit:. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.68 Total TXVs: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
In the first example we will determine the tons per circuit when both TXVs are active and the compressor is unloaded to its minimum of 33%.
=
(1.68 Tons per Circuit) x (33% Minimum Unloading) x (2 TXVs)
2 TXVs Active
= (1.68) x (.33) x (2)
2 = .55 tons per circuit at minimum unloading UNACCEPTABLE
If we install a liquid line solenoid valve before one of the TXVs and close it so that only one TXV is active when the compressor is unloaded to its minimum of 33%, we see the following:
=
(1.68 Tons per Circuit) x (33% Minimum Unloading) x (2 TXVs)
1 TXV Active
= (1.68) x (.33) x (2)
1
47
= 1.10 tons per circuit at minimum unloading ACCEPTABLE There are three different options to control tons per circuit
when using an unloading compressor. The first is to use drop solenoid valve control as illustrated above and let the suction cutoff unloaders ride with the load. The second is to use drop solenoid valve control as illustrated above with electric unloaders and let the control algorithm determine the combination of solenoid valves and unloaders to limit tons per circuit to acceptable limits. The third is to limit the minimum amount of unloading so that tons per circuit is within accept- able limits.
Heat Pump Bypass Kit The Heat Pump Bypass Kit can be used with 39SHK, 39SM, 39SR, and 39SV07-09 units. Follow this procedure to install the kit: 1. Cut off the ends of the stubout tubes near the location
of the dotted lines shown in Fig. 74. 2. Slip the swaged ends of the bypass kit over the open tube
ends. 3. Cut copper ell as required for fit. 4. Check assembly to ensure proper orientation for free
flow. 5. Braze the joints. The check valve body must be protected
from overheating. 6. Check for leaks.
CUT
CUT
FREE FLOW DIRECTION
FIELD BRAZE AFTER SIZING
CHECK VALVE BYPASS ASSEMBLY
a39-4498
Fig. 74 Heat Pump Bypass Kit Installation
Drain Pan Replacement The following drain pan replacement procedure applies to 39SHC/SHF/SHK units with any standard drain pan offering. 1. Identify drain pan type (plastic or stainless steel). 2. Remove coil stubout panel on the connection side of the
unit (39SHC/SHF/SHK sizes 00-05). For sizes 07-17 skip to Step 3 (coil panel will be one piece).
3. Remove filter access panel and filter. 4. Remove coil retaining screws (sizes 00-05 have 4 each
and sizes 07-17 contain up to 6 each). Screws are accessi- ble from the filter side of the unit. Screws are used to at- tach the first coil to the coil panel.
5. Remove top panel screws at sides and rear (do not re- move front screws).
NOTE: Ensure unit is properly supported before removing screws. Top panel will not be removed. 6. Remove screws at bottom of coil panel. Remove coil
panel. 7. Next, remove the coils from the unit along with the drain
pan. NOTE: Drain pan will slide out of the unit. NOTE: To remove coils, lift top panel. 8. If the unit is single wall construction, simply install the
new drain pan and the coils. 9. For double wall units, coil panels have a liner panel that
ends above the edge of the drain pan. For these panels, apply adhesive backed closed cell insulation (15-1/4 in. x 1-1/2 in.) to the inside of the coil panel, flush with the bot- tom of the liner panel. This provides an air seal to the end of the drain pan. Proceed with the installation of the new drain pan and coils.
10. Set coil panel in place and attach coils to the panels. In- stall coil panel screws at bottom and top of unit. Install all top panel screws.
NOTE: Ensure that the top filter rail is behind the top panel flange, and that the rear leg is on the outside of the top panel flange. NOTE: Galvanized drain pans shall be attached to coil panel using (2) No. 8 sheet metal screws. 11. Reinstall the coil stubout panel (unit sizes 00-05) along
with the filter and filter door.
Coil Removal
WARNING
Never enter an enclosed fan cabinet or reach into a unit while the fan is running. Failure to follow this warning can result in severe personal injury.
WARNING
To avoid possible injury or death due to electrical shock, lock open and tag the fan motor power disconnect switch before working on a fan. Remove and retain fuses and note removal on tag.
WARNING
To avoid possible injury or death due to electrical shock, lock open and tag the electric heat coil power disconnect switch before working on or near heaters.
Follow these steps to remove and replace coil. 1. Isolate and drain coil from heating/cooling fluid and/or
reclaim refrigerant. Disconnect unit from piping. 2. Remove supply piping to allow access into the coil sec-
tion from the side. 3. Remove coil section access panel.
NOTE: If the blower section is on top of coil section, lift the blower section up to allow removal of cross rail. Blower section must be raised up approximately 2 in. during the entire procedure. 4. Remove screws at filter side of coil and far side from coil.
Remove cross rail. 5. Remove screws that attach the coil to the vertical and hor-
izontal coil mounting pieces (if present).
48
6. Lift coil up approximately 1 in. and remove from unit. Drain pan remains in place.
7. (If one coil will be installed, skip to Step 8.) If two coils are to be installed, set new coils upright on a flat surface resting on their bottom edges. Attach coils together along horizontal top flange using at least (2) screws and at least 1 screw on each side flange.
8. Set new coil into drain pan, move coil into position and attach to vertical mounting surfaces using (2) self-drilling sheet metal screws across the top flange, and at least (1) screw on each side flange.
9. Install cross rail. NOTE: If blower section is on top of coil section, set blower section back down on coil section and secure. 10. Install coil section access panel. 11. Restore unit to service.
Electric Heaters Electric heaters may be factory- installed or factory-supplied for field installation. Figures 75-83 are electric heater wiring diagrams.
a39-4513
Fig. 75 Electric Heat Wiring Schematic, Dual Point Power (1 Element), 240V, Single Phase, 1 to 6 kW
LEGEND
High-Voltage Factory Wiring
Low-Voltage Factory Wiring
- - - - - Field-Wiring
a39-4514
Fig. 76 Electric Heat Wiring Schematic, Dual Point Power (2 Elements), 240V, Single Phase, 7 to 10 kW
LEGEND
High-Voltage Factory Wiring
Low-Voltage Factory Wiring
- - - - - Field-Wiring
a39-4515
Fig. 77 Electric Heat Wiring Schematic, Dual Point Power (3 Elements), 240V, Single Phase, 11 to 17 kW
LEGEND
High-Voltage Factory Wiring
Low-Voltage Factory Wiring
- - - - - Field-Wiring
49
a35-4516
Fig. 78 Electric Heat Wiring Schematic, Dual Point Power (1 Element), 277V, Single Phase, 1 to 6 kW
LEGEND
High-Voltage Factory Wiring
Low-Voltage Factory Wiring
- - - - - Field-Wiring
a39-4517
Fig. 79 Electric Heat Wiring Schematic, Dual Point Power (2 Elements), 277V, Single Phase, 7 to 10 kW
LEGEND
High-Voltage Factory Wiring
Low-Voltage Factory Wiring
- - - - - Field-Wiring
50
a39-4518
Fig. 80 Electric Heat Wiring Schematic, Dual Point Power (3 Elements), 277V, Single Phase, 11 to 13 kW
LEGEND
High-Voltage Factory Wiring
Low-Voltage Factory Wiring
- - - - - Field-Wiring
a39-4519
Fig. 81 Electric Heat Wiring Schematic, Dual Point Power (3 Elements), 277V, Single Phase, 14 to 17 kW
LEGEND
High-Voltage Factory Wiring
Low-Voltage Factory Wiring
- - - - - Field-Wiring
51
a39-4520
Fig. 82 Electric Heat Wiring Schematic, Dual Point Power (Star Wiring), 240V 3-Phase 1 to 10 kW and 480V 3-Phase 2 to 20 kW
LEGEND
High-Voltage Factory Wiring
Low-Voltage Factory Wiring
- - - - - Field-Wiring
a39-4521
Fig. 83 Electric Heat Wiring Schematic, Dual Point Power (Delta Wiring), 240V 3-Phase 11 to 17 kW and 480V 3-Phase 21 kW
LEGEND
High-Voltage Factory Wiring
Low-Voltage Factory Wiring
- - - - - Field-Wiring
52
53
Motor Start/Stop Stations
WARNING
To avoid possible injury or death due to electrical shock, open the power supply disconnect switch and secure it in an open position during installation.
CAUTION Use only copper conductors for field-installed electrical wiring. Unit terminals are not designed to accept other types of conductors.
All field-installed wiring, including the electrical ground, MUST comply with the National Electrical Code (NEC) as well as applicable local codes. In addition, all field wiring must conform to the Class II temperature limitations described in the NEC.
Refer to Fig. 84-86 for optional factory-installed motor start/stop station wiring diagrams.
Fig. 84 Single-Phase Motor Start/Stop Station Wiring Diagram
LEGEND GND Ground TB Terminal Block TRAN1 Transformer
High-Voltage Factory Wiring Low-Voltage Factory Wiring
- - - - - - Field-Wiring
Fig. 85 3-Phase Motor Start/Stop Station Wiring Diagram
LEGEND GND Ground TB Terminal Block TRAN1 Transformer
High-Voltage Factory Wiring Low-Voltage Factory Wiring
- - - - Field-Wiring
460V 3 Phase
PS 1GRN/153
RED/152
BLK/151
BLU/136
YEL/131 YEL/135
BLK/133 BLK/134
RED/500
BRN/505
BLK/502 BLU/136
OLR
L1
L2
L3
A BFS
T1
YEL/135
BLK/134
BLK/502
GRN/150 GRN/142
GRN/142
YEL/131
BLK/133
RED/500
BRN/501
BRN/505 BRN/501
GRN/143 T2
T3
G R
N 57
0
A39-4490
Fig. 86 Typical Motor Start/Stop Station Wiring
LEGEND FS Fan Starter OLR Overload Relay PS Power Switch TB Terminal Block TRAN1 Transformer
Chassis Ground
Splice Connection Point High-Voltage Factory Wiring Low-Voltage Factory Wiring
- - - - Field-Wiring
54
55
VFD
WARNING
Dangerous voltage is present when input power is con- nected. After disconnecting power supply wait at least 5 minutes before performing any maintenance. Failure to fol- low these instructions may result in personal injury or equipment damage.
Factory installed variable frequency drives (VFD) are wired to the motor and fully tested before shipment. Drive program- ming is also done at the factory.
Open the VFD front cover and the fan section access door to check for any damage before proceeding.
39SHK and 39SHF products have several control options. For all options, the VFD can be put into manual mode from the keypad. Other control options allow for field-supplied fan speed signal and for keypad control (manual speed setting).
VFDs are located inside the blower compartment. Keypad is mounted on unit exterior for all control options.
Typical wiring diagrams are shown FOR REFERENCE, see Fig. 87-89. Always refer to the wiring diagram on the air handling unit for actual wiring.
Connect electrical service to unit. Refer to unit wiring dia- gram. NOTE: Check motor rating plate for correct line voltage.
For power supply connection, route field power wiring to field-provided and installed disconnect switch and from switch to junction box on unit. Unit is internally wired from junction box to VFD.
Refer to nameplate FLA, maximum overcurrent protection device (MOPD) and minimum circuit ampacity (MCA). Also refer to wiring diagram affixed to unit to make control and power wiring connections.
U1 U2
V1 V2
W1 W2
PE
VFD BLK/134
YEL/135
BLU/136
GRN/137
BLK/140
RED/141
ORN/142
GRN/143
1
3
2
IFM BLK/150
RED/151
ORN/152
GRN/153
L1
L2
L3
208/240v 3
GND
USE COPPER SUPPLY WIRES.
BLK/101
240V
208V
YEL/102
COM
TRAN 1 RED/505
R
C
G
TB1 RED/505
BRN/502
BLK/504 A BFR1
BRN/503
GRN/500 BRN/501
24 V
A C
TRAN 1 IS FACTORY WIRED FOR 230V. MOVE WIRE BLK/101 TO THE 208V
TAP FOR 208V APPLICATIONS.
A I1
A I2 S1
VFD
B LU
/5 08
V IO
/5 06
B LU
/5 07
4 7
BLK/510
YEL/509+
Y E
L/ 50
9
B LK
/5 10
1 2 3 4 9 10 11 12 13 14 15 16
VFD IS FACTORY CONFIGURED FOR 4-20mA OPERATION. IN THE FIELD, MOVE THE S1 JUMPER TO V FOR 0-10 VDC OPERATION
AND CHANGE PARAMETER 1301 TO ZERO
NOTES: 1. This diagram represents the factory-installed electrical option with 4-20 mA field signal input for fan speed control. Includes VFD keypad
mounted on outside of unit. 2. Typical wiring is shown. For exact wiring, refer to the wiring diagram provided with the unit. 3. Field wiring includes power wiring (upper left hand corner) and low voltage control wiring (terminal block TB1). 4. Units ordered for 208V-240V voltage selection are factory wired for 240V. Field may rewire motor and transformer primary tap for operation at
208V. 5. Selection of field provided and installed electrical components is the responsibility of the installer, including branch circuit protection and wiring. 6. To start the fan, connect R and G to energize fan relay FR1. Control fan speed by providing 4-20 mA signal at + and - connections at TB1. 7. The control power (R and C at terminal block TB1) can be used to power a standard 24VAC thermostat, DX relay and up to 2 control valves.
NOTE: Installer is responsible for power wiring and branch circuit over current protection.
Fig. 87 Control Option A, 4-20 mA Fan Speed Control Typical Wiring Diagram
U1 U2
V1 V2
W1 W2
PE
VFD BLK/134
YEL/135
BLU/136
GRN/137
BLK/140
RED/141
ORN/142
GRN/143
1
3
2
IFM BLK/150
RED/151
ORN/152
GRN/153
L1
L2
L3
208/240v 3
GND
USE COPPER SUPPLY WIRES.
BLK/101
240V
208V
YEL/102
COM
TRAN 1 RED/505
R
C
G
TB1 RED/505
BRN/502
BLK/504
C L
A S
S 2
A BFR1 BRN/503
GRN/500 BRN/501
24 V
A C
TRAN 1 IS FACTORY WIRED FOR 230V. MOVE WIRE BLK/102 TO THE 208V
TAP FOR 208V APPLICATIONS.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
S C
R A
I G
N D
+ 10
V A
I2 G
N D
A O
G N
D +
24 G
N D
D C
O M
D I1
D I2
D I3
D I4
D I5A I1
A I2
S1
VFD
RJ-45 BULKHEAD
PASSTHROUGH
B LU
/5 08
V IO
/5 06
B LU
/5 07
4 7
KEYPAD/DISPLAY
NOTES: 1. This diagram represents the factory-installed electrical option with manual fan speed control using the VFD keypad mounted on outside
of unit. 2. Typical wiring is shown. For exact wiring, refer to the wiring diagram provided with the unit. 3. Field wiring includes power wiring (upper left hand corner) and low voltage control wiring (terminal block TB1). 4. Units ordered for 208V-240V voltage selection are factory wired for 240V. Field may rewire motor and transformer primary tap for operation at
208V. 5. Selection of field provided and installed electrical components is the responsibility of the installer, including branch circuit protection and wiring. 6. To start the fan, connect R and G to energize fan relay FR1. Control fan speed using the keypad. 7. The control power (R and C at terminal block TB1) can be used to power a standard 24VAC thermostat, DX relay and up to 2 control valves.
56
Fig. 88 Control Option B, Manual Fan Speed Control Typical Wiring Diagram
U1 U2
V1 V2
W1 W2
PE
VFD BLK/134
YEL/135
BLU/136
GRN/137
BLK/140
RED/141
ORN/142
GRN/143
1
3
2
IFM BLK/150
RED/151
ORN/152
GRN/153
L1
L2
L3
208/240v 3
GND
USE COPPER SUPPLY WIRES.
BLK/101
240V
208V
YEL/102
COM
TRAN 1 RED/505
R
C
G
TB1 RED/505
BRN/502
BLK/504
C L
A S
S 2
A BFR1 BRN/503
GRN/500 BRN/501
24 V
A C
TRAN 1 IS FACTORY WIRED FOR 230V. MOVE WIRE BLK/102 TO THE 208V
TAP FOR 208V APPLICATIONS.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
S C
R A
I G
N D
+ 10
V A
I2 G
N D
A O
G N
D +
24 G
N D
D C
O M
D I1
D I2
D I3
D I4
D I5A I1
A I2
S1
VFD
B LU
/5 08
V IO
/5 06
B LU
/5 07
4 7
KEYPAD/DISPLAY
V IO
/5 11
B LK
/5 14
V IO
/5 12
BLU/515
BLK/514
BLU/515 BLU/508
PRESSURE TRANSDUCER
+
NOTES: 1. This diagram represents the factory-installed electrical option with constant CFM control using the pressure transducer mounted inside
the unit. Control loop logic is contained in the VFD programming. VFD keypad is mounted on outside of unit. 2. Typical wiring is shown. For exact wiring, refer to the wiring diagram provided with the unit. 3. Field wiring includes power wiring (upper left hand corner) and low voltage control wiring (terminal block TB1). 4. Units ordered for 208V-240V voltage selection are factory wired for 240V. Field may rewire motor and transformer primary tap for operation at
208V. 5. Selection of field provided and installed electrical components is the responsibility of the installer, including branch circuit protection and
wiring. 6. To start the fan, connect R and G to energize fan relay FR1. Fan speed is controlled by the VFD using the pressure transducer signal to main-
tain a fixed airflow (constant pressure difference across the calibrated fan nozzle). 7. The control power (R and C at terminal block TB1) can be used to power a standard 24VAC thermostat, DX relay and up to 2 control valves.
57
Fig. 89 Control Option D, Constant CFM Control Typical Wiring Diagram
58
Reset VFD to Factory Settings
CAUTION
Failure to follow these instructions may result in equipment damage. Changing certain parameters can lead to improper motor operation, such as operation at current higher than the allowable maximum. DO NOT CHANGE the follow- ing settings without written factory approval: maximum output frequency maximum motor current motor direction minimum frequency motor nominal current motor nominal speed
TO RESET VFD PARAMETERS TO THE FACTORY SETTINGS
1. Move jumper S1 (see Fig. 90) settings on VFD to match factory wiring diagram,
2. Change parameter 9902 to HVAC default to reset all the parameters,
3. Set all parameters to values indicated in Tables 6-8. MODIFY VFD FACTORY SETTINGS
To modify certain VFD parameters, select those parameters and modify as needed. To change parameters: a. Press
59
Table 6 VFD Parameters Control Option A, B, C (Keypad or 4-20 mA Control Signal)
NOTES: 1. Control Option A indicates factory settings for VFD ready for 4-20 mA proportional fan speed signal. Fan speed control is automatic by field-
provided 4-20 mA signal. 2. Control Option B indicates factory settings for VFD with exterior mounted keypad. Fan speed control is manual and controlled at the keypad. 3. Control Option C indicates factory settings for VFD with potentiometer (dial). Fan speed control is manual and is set at the potentiometer.
CONTROL OPTION PARAMETER INDEX PARAMETER FUNCTION SETTING
A B/C
X X 1611 (ACS310-320) Parameter View 3 (Long View)
X X n/a (ACS55 ONLY)
Parameter View Menu PAr S/ PAr L PAr L (Long View)
X X 1001 Start/Stop Command 1 (DI1)
X X 1003 Motor Direction 1 (Forward)
X X 1104 Min. Frequency 10 Hz
X X 1105 Max Ref. Frequency See Table 8
X X 1109 (ACS55 ONLY) Local Reference Source 1 (Keypad)
X X 1201 Constant Speed Selection 0 (No Constant Speed)
X 1301 (POTENT. ONLY) Minimum AI1 0%
X 1301 (4-20mA ONLY) Minimum AI1 20%
X X 1601 Run Enable 1 (DI1)
X X 1608 Start Enable 1 (DI1)
X X 1610 Display Alarms 1 (Yes)
X X 2003 Max Motor Current See Table 8
X X 2008 Maximum Output Drive Frequency See Table 8
X X 2606 Switching Frequency 16 kHz
X X 9905 Motor Nominal Voltage 115 (for 115V) or 230 (for 208-230V) or 460 (for 460V)
X X 9906 Motor Nominal Current See Table 8
X X 9908 Motor Nominal Speed 3500
60
Table 7 VFD Parameters Control Option D (Constant CFM Control)
NOTE: Control Option D indicates factory settings for VFD with constant CFM (airflow) control. VFD speed is controlled using the differential pressure output from the differential pressure transducer. The VFD changes RPM to keep the DP setpoint constant, which results in constant airflow.
PARAMETER INDEX PARAMETER FUNCTION SETTING
1611 Parameter View 3 (Long View)
9902 Application Macro 1 (HVAC Default)
9905 Motor Nom Voltage 230 or 460 (see Nameplate)
9906 Motor Nominal Current See Table 8
9908 Motor Nominal Speed 3500
1001 Start/Stop Command 1 (DI1)
1002 EXT 2 Commands 1 (DI1)
1003 Motor Direction 1 (Forward)
1102 EXT 1 - EXT 2 SEL EXT 2
1104 Min Frequency 10 Hz
1105 Max Ref Frequency See Table 8
1103 REF1 Select 2(AI2)
1106 REF2 Select 19(PID1Out)
1201 Constant Speed Selection 0 (No Constant Speed)
1301 AI-1 Minimum 0.2
1302 AI-1 Maximum 1
1601 Run Enable 1 (DI1)
1608 Start Enable 1 (DI1)
1609 Start Enable 2 1 (DI1)
1610 Display Alarms 1 (Yes)
2003 Max Motor Current See Table 8
2008 Maximum Output drive frequency See Table 8
2202 Acceleration Time 5s
2203 Decel Time 5s
2606 Switching Frequency 16 kHz
3404 OUTPUT 1 DISPLAY FORM 9 (Direct)
3408 SIGNAL 2 PARAM 130 (PID 1 FBK)
3411 OUTPUT 2 DSP FORM 6 (2 DEC)
3412 OUTPUT 2 DSP UNIT 58 (in H20)
3415 OUTPUT 3 PARAMETER 0128 (PID SETPOINT)
3418 OUTPUT 3 DISPLAY FORM 6 (2 DEC)
3419 OUTPUT 3 UNITS 58 (in H20)
4001 PID GAIN 0.7
4002 PID INTEGRATE 5 s
4005 ERROR VALUE INVERTED 0 (No)
4006 UNITS 58 (in H20)
4007 UNIT SCALE 2 (2 DEC)
4008 0% VALUE 0.0 (in H20)
4009 100 % VALUE 25.0 (in H20)
4010 SET POINT SELECT 19 (INTERNAL)
4011 SET POINT See Table 9
4014 Feedback Select 1 (ACT1)
4016 ACT-1 Input 2(AI2)
FLA Full Load Amps
61
Table 8 VFD Parameters All Control Options
LEGEND
CONSTANT CFM CONTROL OPTION With the con- stant CFM option the pressure transducer measures differential pressure (DP, units of in w.g.) across the fan inlet nozzle. The DP signal goes to the VFD which has the control logic, and the controls change fan RPM to try to maintain the DP setpoint. As the filters load up, the airflow drops and the control loop speeds up the fan to compensate, keeping the DP (and therefore CFM) the same. Below is the procedure for changing the DP setpoint. Table 9 show airflow and corresponding DP settings to choose from. Note that the VFD will limit the max RPM and motor current to protect the motor and drive, so some of these settings wont be possible with all static pressures.
To change constant CFM setpoint: change VFD parameter 4011 to the value in the table that corresponds to the desired CFM. Interpolate as needed to reach CFM values between the table values.
For example: To operate HHA20 at 2040 cfm, go to the HHA16-25 table (Table 9), locate 2040 cfm, read DP Set Point of 7.0 in. wg (first column), so 7.0 will be the setting for param- eter 4011.
Table 9 Constant CFM Differential Pressure (DP) Set Points
START-UP
Pre-Start-Up BUILDING ENVELOPE All building windows and doors should be installed and closed before starting unit. During sum- mer construction, avoid unit sweating by allowing for gradual pull down: use elevated chilled water temperature, reduce chilled water flow rate (gpm), and use maximum available air- flow. HEATING FLUID TEMPERATURE Maximum enter- ing water temperature is 180F, unless nameplate indicates 200F.
CAUTION
If unit is marked for 200F maximum entering water tem- perature, customer must ensure that water vaporization does not occur, especially at higher elevations when entering water temperatures are greater than 190F.
TEMPERATURE CONTROLS Check that unit or wall- mounted thermostat or field-supplied controller is connected to the unit. OUTSIDE AIR AND FREEZE PROTECTION
CAUTION
Ensure that the unit is protected against freezing conditions. Failure to provide freeze protection may result in equipment or property damage.
Freeze protection measures are customer-provided and installed, and include but are not limited to low-limit thermo- stats, automatic temperature controls, and use of glycol-based heat transfer fluids (see the section Coil Freeze-Up Protection on page 45). DAMPER OPERATION If locking quadrant manual damper operator is provided, set to desired position. If a damp- er actuator is provided, ensure that the actuator opens the damper when the fan turns on, and closes when the fan stops. Test mixing box controls to make sure the outside air damper closes on power failure or upon activation of customer-sup- plied and installed low-limit thermostat or other freeze protec- tion device.
Checklist Make a walkway inside unit components to protect insulation. Remove all construction debris from unit interior. Remove walkway before starting unit. FILTERS Install unit filters in all filter sections. FANS 1. Check lubrication of fan, motor bearings, and linkages.
a. Note that bearings are shipped completely full of grease for corrosion protection and may run warm temporarily on start-up until excess grease has discharged.
b. Hand-operate all damper linkages to check for freedom of movement.
2. Check tightness of bearing setscrews or locking collars. Also, check tightness of setscrews on fan wheels and sheaves.
3. Check tightness of fan shaft bearing mounting. 4. Recheck sheave alignment and belt tension. (Refer to
Fig. 63 and 64.) 5. Hand turn fan to make certain fan wheel does not rub in
housing.
UNIT HP
PARAMETER 2003/9906 11105/2008
115/160 208-230 460V MAX
FLA FLA FLA FREQ
HHA08/12 1.0 3.75 3.75 1.81 76
1.5 4.83 2.30 85
HHA16/20/25
2.0 6.44 2.88 55
3.0 8.74 4.37 59
5.0 14.60 6.90 76
HHA04 THROUGH HHA12 HHA16 THROUGH HHA25
DP Set Point (in. w.g.)
Parameter 4011 CFM
DP Set Point (in. w.g.)
Parameter 4011 CFM
0.5 353 2.0 1095
1.0 433 2.5 1222
1.5 521 3.0 1372
2.0 560 3.5 1475
2.5 614 4.0 1561
3.0 694 4.5 1662
3.5 752 5.0 1775
4.0 793 5.5 1838
4.5 832 6.0 1916
5.0 869 6.5 1975
5.5 916 7.0 2040
6.0 950 7.5 2223
6.5 983 8.0 2288
7.0 1015 8.5 2352
7.5 1045 9.0 2406
8.0 1075 9.5 2567
8.5 1104 10.0 2641
9.0 1132 10.5 2701
9.5 1169 11.0 2748
10.0 1205 11.5 2805
10.5 1239
11.0 1264
11.5 1305
62
6. Check fan speed with a strobe-type tachometer or use the following formula: Obtain the motor rpm from the fan motor nameplate and read sheave pitch diameters marked on the fan and motor pulleys, or estimate the pitch diame- ters by using the pulley outside diameters. Then:
Fan Rpm =
Motor Rpm x Motor Sheave Pitch Diameter (in.)
Fan Sheave Pitch Diameter (in.) Example:
Actual Approximate Nameplate Motor
Rpm = 1760 1760
Mtr Sheave Pitch Diameter = 8.9 in. 9.0 in. (OD)
Fan Sheave Pitch Diameter = 12.4 in. 12.5 (OD) Fan RPM = 1760 x 8.9 1760 x 9.0
= 12.4 12.5 = 1263 rpm 1267 rpm
Refer to the product data catalog for maximum allowable fan speeds for standard wheels. Excessive fan speed may result in condensate carryover from cooling coil or fan motor overload and wheel failure.
7. Check direction of rotation (see Fig. 91). Arrow on drive side of fan housing indicates correct direction of rotation.
Fig. 91 Fan Wheel Rotation
8. Check vibration. If excessive vibration occurs, check for the following: a. Variable sheave (if air balance of system has been
accomplished: replace sheave with fixed sheave for continuous application).
b. Drive misalignment. c. Mismatched, worn or loose belts. d. Wheel or sheaves loose on shaft. e. Loose bearings. f. Loose mounting bolts. g. Motor out of balance. h. Sheaves eccentric or out of balance. i. Vibration isolators improperly adjusted. j. Out-of-balance or corroded wheel (rebalance or
replace if necessary). k. Accumulation of material on wheel (remove
excess material).
63
SERVICE
General 1. Place a suitable walkway to protect floor insulation
whenever entering the fan section. 2. Review Safety Considerations at beginning of these in-
structions. Good safety habits are important tools when performing service procedures.
3. To make speed measurements, use a strobe-style tachom- eter or calculate per Step 6 of Start-Up, Check List.
Fan Motor Replacement see Fig. 92-96 for typical motor wiring diagrams. 1. Shut off motor power. 2. Disconnect and tag power wires at motor terminals.
3. Loosen motor brace-to-mounting-rail attaching bolts. Loosen belt tensioning bolts to adjust the motor position so V-belts can be removed without stretching over grooves.
4. Mark belt as to position. Remove and set aside belts. 5. Remove motor to motor bracket holddown bolts. 6. Remove motor pulley and set aside. 7. Remove motor. 8. Install new motor. Reassemble by reversing Steps 1-6. Be
sure to reinstall multiple belts in their original position. Use a complete new set if required. Do not stretch belts over sheaves. Review the sections on motor and sheave installation, sheave alignment and belt tensioning dis- cussed previously (Fig. 63-65).
9. Reconnect motor leads and restore power. Check fan for proper rotation as described in Start-Up, Check List.
115 V OR 265 V, SINGLE PHASE
L1
N
BLK
WHT
GRN
SEE MOTOR NAMEPLATE FOR WIRING
DETAIL
L1
L2
BLK
RED
GRN
SEE MOTOR NAMEPLATE FOR WIRING
DETAIL
208-230 V, SINGLE PHASE
208-230 V, 460 V, THREE PHASE
L1
L2
BLK
RED
GRN
L3 ORN
SEE MOTOR NAMEPLATE FOR WIRING
DETAIL
A39-4493
Fig. 92 Typical Wiring Diagrams, Single-Speed Fan Motors
N
GRN/100
L1 (HIGH)
L1 (LOW)
BLK/102
RED/103
WHT/101
BLK/102
RED/103
WHT/101
GRN/100
L2 (COM)
GRN/100
L1 (HIGH)
L1 (LOW)
BLK/102
RED/103
YEL/101
BLK/102
RED/103
YEL/101
GRN/100
1
2
3 LOW
SPEED
11
12
13 HIGH
SPEED
L1
GRN/100
L2
L3
BLU/102
YEL/103
BLK/101
RED/104
ORN/105
BRN/106
BLU/102
YEL/103
BLK/101
RED/104
ORN/105
BRN/106
LOW SPEED
HIGH SPEED
L1
L2
L3
GRN/100
115 V OR 265 V, SINGLE PHASE
208-230 V, SINGLE PHASE
208-230 V, 460 V, THREE PHASE
SEE MOTOR NAMEPLATE FOR WIRING
DETAIL
SEE MOTOR NAMEPLATE FOR WIRING
DETAIL
A39-4494
Fig. 93 Typical Wiring Diagrams, Dual Speed Fan Motors
NOTES: 1. Field-supplied fan controls must prevent simultaneous
engagement of both high and low speeds. 2. Field-supplied fan controls must provide motor overload pro-
tection and both motor windings must be connected in the correct phase sequence.
BA FR
47
69
R C G
L1
N
BLK/141
USE COPPER SUPPLY WIRES.
GND
WHT/140 TRAN1
24 V
G R
N 57
0
RED/500
BRN/501
BRN/501
RED/500
BRN/505
BLK/502
BLK/502
WHT/131
WHT/140
BLK/134
BLK/134 BLK/141 FAN MOTORBRN/505
TB1
BLK/133
WHT/131
BLK/133 DISC1
GRN/142
GRN/142
REFER TO MOTOR NAMEPLATE FOR WIRING DETAILS.
A39-4495
Fig. 94 Typical Wiring Diagram, Single-Phase Relay Control
LEGEND
DISC1 Disconnect FR Fan Relay GND Ground TRAN1 Transformer
High Voltage Wiring Low Voltage Wiring
64
FC
T2
T1
L2
L1
T3L3
R C G
L1
L2
USE COPPER SUPPLY WIRES.
GND
YEL/135
RED/500
BRN/501
RED/500
BRN/505
BLK/502
YEL/131
BLK/134
TB1
BLK/133
YEL/131
BLK/133
GRN/143
GRN/142
3 Phase
TRAN1
24 V
G R
N 57
0
BRN/501 BLK/502
BLK/134 BLK/141
BRN/505
YEL/135 RED/140 FAN MOTOR
ORN/142
L3 DISC1
BLU/136
BLU/136
REFER TO MOTOR NAMEPLATE FOR WIRING DETAILS.
a39-4496
Fig. 95 Typical Wiring Diagram, Three-Phase Contactor Control
LEGEND
DISC1 Disconnect FC Fan Contactor GND Ground TRAN1 Transformer
High Voltage Wiring Low Voltage Wiring
SFS
T2
T1
L2
L1
T3L3
R C G
L1
L2
USE COPPER SUPPLY WIRES.
GND
YEL/135
RED/500
BRN/501
RED/500
BRN/505
BLK/502
YEL/131
BLK/134
TB1
BLK/133
YEL/131
BLK/133
GRN/143
GRN/142
3 Phase
TRAN1
24 V
G R
N 57
0
BRN/501 BLK/502
BLK/134 BLK/141
BRN/505
YEL/135 RED/140 FAN MOTOR
ORN/142
L3 DISC1
BLU/136
BLU/136
REFER TO MOTOR NAMEPLATE FOR WIRING DETAILS.
a39-4497
Fig. 96 Typical Wiring Diagram, Three-Phase Starter Control
LEGEND
DISC1 Disconnect GND Ground SFS Supply Fan Starter TRAN1 Transformer
High Voltage Wiring Low Voltage Wiring
65
Coil Cleaning DETERGENT Spray mild detergent solution on coils with garden-type sprayer. Rinse with fresh water. Check to ensure condensate line is free. Excess water from cleaning may flood unit if condensate line is plugged.
Winter Shutdown (Chilled Water Coil Only) ANTIFREEZE METHODS OF COIL PROTECTION 1. Close coil water supply and return valves.
2. Drain coil as follows: Method I Break flange of coupling at each header location. Separate flange or coupling connection to facili- tate coil draining. Method II Open both valves to auxiliary drain piping.
3. After coil is drained: Method I Connect line with a service valve and union from upper nozzle to an antifreeze reservoir. Connect a self-priming reversible pump between the low header connection and the reservoir.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53390020-01 Printed in U.S.A. Form 39S-3SI Pg 66 2-18 Replaces: 39S-2SI
Carrier Corporation 2018
Method II Make connection to auxiliary drain valves. 4. Fill reservoir with any inhibited antifreeze acceptable to
code and underwriter authority. 5. Open service valve and circulate solution for 15 minutes;
then check its strength. 6. If solution is too weak, add more antifreeze until desired
strength is reached, then circulate solution through coil for 15 minutes or until concentration is satisfactory.
7. Remove upper line from reservoir to reversible pump. Drain coil to reservoir and then close service valve.
8. Break union and remove reservoir and its lines. 9. Leave coil flanges or coupling open and auxiliary drain
valves open until spring. AIR DRYING METHOD OF COIL PROTECTION (Unit and coil must be level for this method.) 1. Close coil water supply and return main valves. 2. Drain coil as described in procedures for Antifreeze
Methods of Coil Protection. 3. Connect air supply or air blower to inlet header connec-
tion and close its drain connection. 4. Circulate air and check for air dryness by holding mirror
in front of open vent in outlet header drain connection. Mirror will fog if water is still present.
5. Allow coil to stand for a few minutes; repeat Step 4 until coil is dry.
PIPING Direct expansion, chilled water, and hot water coils should always be piped for counterflow. (Fluid should enter the coil at the leaving-air side.) Steam coils must have the condensate connection at bottom of coil.
To determine intervals for cleaning coils in contaminated air operations, pressure taps should be installed across the coils and checked periodically. Abnormal air pressure drop will indi- cate a need for cleaning the coils. Annual maintenance should include: 1. Clean the line strainers. 2. Blow down the dirt leg. 3. Clean and check operation of steam traps. 4. Check operation of control valves. 5. Check the operation of check valves to prevent conden-
sate flowback. 6. Check operation of thermostatic air vents, if used. A float
and thermostatic trap will contain a thermostatic air vent. When the bellows is ruptured, it will fail closed.
7. Check operation of vacuum breakers.
8. Check operation of the thermal protection devices used for freeze-up protection.
9. Steam or condensate should not be allowed to remain in the coil during the off season.This will prevent the forma- tion and build up of acids.
There are additional precautions and control strategies, as found in various catalogues and in the ASHRAE Fundamentals Handbook and in the Carrier System Design Guide Piping Section, when the entering-air temperature to the coil falls be- low 35F. These conditions occur when IDT coils are used for pre-heat and/or face and bypass applications. Freeze up protection: 1. Use a strainer in the supply line and the dirt leg ahead of
the trap. 2. Use a vacuum breaker in the return. 3. Do not use overhead returns from the coil. A floodback
can occur. 4. An immersion thermostat to control outdoor-air dampers
and the fan motor is recommended. This control is acti- vated when the steam supply fails or the condensate temperature drops below a predetermined temperature, usually 120F.
5. On low pressure and vacuum systems, the immersion thermostat may be replaced by a condensate drain with a thermal element. This element opens and drains the coil when the condensate temperature drops below 165F. Note the thermal condensate drain is limited to 5 psig pressure. At greater coil pressures they will not open.
In spite of the precautions listed above, a coil may still freeze up. An oversize capacity coil, at partial load, with a modulating steam control valve will occasionally freeze. Freezing occurs in the 20F to 35F range of entering-air temperatures. A better installation would be an undersize coil, with an on/off control valve with thermostatic control in the outside air, set at 35F air temperature, installed downstream of the first coil; or setting the minimum steam pressure at 5 psig.
Filters FILTER SECTIONS Open or remove filter panel to re- place old filter with a new filter. See physical data tables for fil- ter data.
Lubrication MOTORS Lubricate in accordance with nameplate at- tached to motor or with manufacturers recommendations included with motor. BEARINGS Fan Bearings Lubricate fan bearings in accordance with manufacturers recommendations included with blower.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53390020-01 Printed in U.S.A. Form 39S-3SI Pg CL-1 2-18 Replaces: 39S-2SI
START-UP CHECKLIST 39S AHU UNITS
NOTE: To avoid injury to personnel and damage to equipment or property when completing the procedures listed in this start-up checklist, use good judgment, follow safe practices, and adhere to the safety considerations/information as outlined in preceding sections of this Installation Instruction document.
I. PRELIMINARY INFORMATION
MODEL NO.JOB NAME ________________________
SERIAL NO. ADDRESS ________________________
START-UP DATE _____________________________
TECHNICIAN NAME __________________________
ADDITIONAL ACCESSORIES
_____________________________________________________________________________________________________
II. PRE-START-UP
CONTROLS
Are thermostat(s) and indoor fan control wiring connections made and checked? (Y/N) _____
Are all wiring terminals tight? (including power to fan motors, heaters, etc.) (Y/N) _____
ELECTRICAL
Does electrical service correspond to unit nameplate? (Y/N) _____
Nameplate Supply Voltage/Phase: Rated __________ Measured __________
Nameplate Rated FLA Motor Current: Rated __________ Measured __________
Does setting for overload device (factory or field-provided) match motor FLA? (Y/N) _____
Does all field wiring conform to unit wiring diagram? (Y/N) _____
AIR HANDLER
Remove packaging and any construction debris. (Y/N) _____
Inspect for shipping and/or handling damage, make claims as required. (Y/N) _____
Inspect all panel flanges for damage. Panel flanges should be smooth with no sharp bends. (Y/N) _____
Are all corner connectors and frame to channel joints smooth with no cracks, large bumps
or depressions in the caulk? (Y/N) _____
Are any door latches loose or damaged? If so, tighten or replace. (Y/N) _____
Remove red shipping screws from blower discharge (fan stabilizers during shipping). (Y/N) _____
Check fan bearings and shaft(s) for tightness. (Y/N) _____
Hand turn fan to ensure no rubbing with housing. (Y/N) _____
Have fan and motor pulleys been checked for proper alignment? (Y/N) _____
Do the fan belts have proper tension? (Y/N) _____
Check fan speed with a laser-type tachometer or use VFD output to confirm operating speed. (Y/N) _____
Are proper air filters in place? (Y/N) _____
Are all wiring terminals to fan motors and heaters tight? (Y/N) _____
Is duct connected to unit? (Y/N) _____
Is unit properly supported? (Y/N) _____
Is unit level (for effective condensate drainage? (Y/N) _____
Verify wiring is correct for application (voltage, etc.) per component label. (Y/N) _____
Are field wiring penetrations into 39S properly sealed for air and water leaks (includes conduit inside box)? (Y/N) _____
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53390020-01 Printed in U.S.A. Form 39S-3SI Pg CL-2 2-18 Replaces: 39S-2SI
Carrier Corporation 2018
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C U
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LO N
G D
O T
T E
D L
IN E
C U
T A
LO N
G D
O T
T E
D L
IN E
PIPING
Is condensate trap properly sized? (Y/N) _____
Has water been placed in drain pan to confirm proper drainage? (Y/N) _____
Is auxiliary external condensate drain pan installed as recommended by IOM? (Not required for valid warranty) (Y/N) _____
Have leak checks been made at chillers, boilers, valves, and indoor coils? (Y/N) _____
Has air been bled from system? (Y/N) _____
Is freeze protection provided (if required)? (Y/N) _____
For DX system, has system been charged with refrigerant? (Y/N) _____
Is expansion valve sensing bulb properly installed and insulated? (Y/N) _____
Is Heat Pump Bypass Kit (HPK) present if required? (Y/N) _____
Does the hydronic system include a pressurer relief valve or other pressure relief device to protect the coil from operating pressures beyond the nameplate design working pressure rating? (Y/N) _____
Are coils equipped with control valves to stop fluid flow to save energy and prevent cabinet condensation (wild coil in cooling) when heating/coolign is not required? (Y/N) _____
Locate, repair, and report any leakes and ensure insulation is in place where needed. (Y/N) _____
III. START-UP If this unit is to be used for construction conditioning without ductwork, ensure balancing is redone and filters replaced once construction is complete. If fan is direct drive, ensure that the VFD has been properly programmed for maximum frequency output to limit fan speed to maximum. (Y/N) _____
Ensure correct fan rotation. (Y/N) _____
After air and water balance is complete, are pulleys aligned? (Y/N) _____
If the fan sheaves were changed during the air balance, the assembly must be rebalanced.
Were the sheaves changed? (Y/N) _____
Was a dynamic balance performed on the fan assembly? (Y/N) _____
After air and water balance and at least 10 minutes running time, record the following measurements:
Check indoor fan speed and record: Fan RPM __________
Entering air db temp __________
Unit entering air wb temp __________
Leaving air db temp __________
Leaving air wb temp __________
Entering water temp __________
Leaving water temp __________
Ensure all water inside air handler is in condensate pan. (Y/N) _____
Check for vibration levels. (Y/N) _____
If electric heater is supplied, ensure heater airflow switch closes at design airflow. (Y/N) _____
NOTES:
___________________________________________________________________________________________________________ ___________________________________________________________________________________________________________ ___________________________________________________________________________________________________________ ___________________________________________________________________________________________________________ ______________
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