Lennox ComfortSense 3000 Series Operation Manual PDF

1 of 10
1 of 10

Summary of Content for Lennox ComfortSense 3000 Series Operation Manual PDF

02/08 50607401

2008 Lennox Industries Inc. Dallas, Texas, USA

RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE

L3532H 5/2 Day Programmable Thermostat

The Lennox ComfortSense 3000 Series model L3532H

5/2 day programmable electronic thermostat has a large, easy-to-read display and provides excellent temperature control. It includes a programmable filter change reminder, an equipment maintenance reminder, and a system check indicator to notify the user when the equipment requires service.

Thermostat model L3532H is suitable for heat pump,

3-stage heat/2-stage cool applications using a gas or electric auxiliary heat source. An optional outdoor temperature sensor provides auxiliary heat lockout, balance point operation, and dualfuel compatibility.

OPERATION MANUAL

ComfortSense 3000 Series Model L3532H 5/2 Day Programmable Thermostat

CONTROLS 50607401 02/08 Supersedes 505,050M

Table of Contents

L3532H 5/2 Day Programmable Thermostat 1. . . . . . General 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Initial Thermostat Power-up 1. . . . . . . . . . . . . . . . . . . . . Buttons, Backlight, Timers & Settings 2. . . . . . . . . . . . DAY/TIME Set Day and Time 2. . . . . . . . . . . . . . . . . . HEAT Heat Mode 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . COOL Cool Mode 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . HOLD Temperature Hold Mode 5. . . . . . . . . . . . . . . . PROG Thermostat Programming 5. . . . . . . . . . . . . . . FAN Controlling Fan Operation 6. . . . . . . . . . . . . . . . . SETTINGS Filter and Maintenance Reminders 6. . . SETTINGS Balance Point 7. . . . . . . . . . . . . . . . . . . . . Service Indicator 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Thermostat RESET 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . Removing/Installing Thermostat 7. . . . . . . . . . . . . . . . . Default Thermostat Settings 7. . . . . . . . . . . . . . . . . . . . Technical Specifications 8. . . . . . . . . . . . . . . . . . . . . . . . Thermostat Output Table 10. . . . . . . . . . . . . . . . . . . . . . .

General

These instructions are intended as a general guide and do

not supersede local codes in any way. Consult authorities having jurisdiction before installation.

Check equipment for shipping damage. If you find any damage, immediately contact the last carrier.

Introduction

This document describes the operation of the Lennox model L3532H thermostat. Refer to the installation manual for instructions regarding installation and wiring of the thermo- stat.

Initial Thermostat Power-up

When power is initially applied to the thermostat, the dis-

play will appear as shown in figure 1.

FAN ON AUTO

SYSTEM COOL OFF EMG. HEAT

I8:88

88

AM PM

ROOM

88

MO TU WE TH FR SA SU

SETPOINT

SERVICE

FILTER

MAINT

Hi Lo

PROG A | B | C | D HOLD

Figure 1. Initial PowerUp Display

All display segments are momentarily activated. This oc-

curs as a normal part of thermostat initialization.

Litho U.S.A.

Page 250607401 02/08

Within a few seconds, the Home Screen appears (see fig- ure 2) with default settings as shown. After about 1 minute of initialization time, the actual room temperature will be displayed.

NOTE Tables 2 and 3 on page 8 show all system and

programming defaults.

I2:00 PROG A B C D HOLD

FAN ON AUTO

SYSTEM COOL OFF

HEAT70 ROOM

SERVICE

FILTER

MAINT MO TU WE TH FR SA SU

AM PM

Figure 2. Home Screen

At this point, the thermostat will be fully functional; its de- fault temperature setpoint (not shown) is 70F. At this point, if the equipment has been fully powered and if a heat demand were present, the system would begin operating.

NOTE Temperature scale default is Fahrenheit units but

may be reset to show Celsius, if desired. See page 8.

Buttons, Backlight, Timers & Settings

Buttons are located behind the small door on the right hand side of the thermostat (see figure 3).

IMPORTANT Do NOT begin pressing buttons until after you read the following section describing each button.

A pale blue display backlight illuminates for 30 seconds

each time any button is pressed.

When PROG or DAY/TIME is pressed, a field begins flash- ing, expecting another input. Start making changes within 15 seconds or the HOME screen will return.

Heat

Prog

Fan

Settings

Cool

Day/Time

Hold

Enter

(DOOR OPEN)

Figure 3. Thermostat Buttons

When an Arrow, HOLD, HEAT, or COOL button is pressed, SETPOINT and the temperature setting appears for 15 seconds. If desired, start making changes within 15 sec- onds or the HOME screen will return. The backlight will turn off 15 seconds after the HOME screen reappears.

DAY/TIME Setting the Day and Time

Press the DAY/TIME button and set the CURRENT hour, minute, and day of week as follows:

1. AM12" will flash on the screen. Press the Up/Down ar- rows buttons to change the hour. (AM" or PM" must correspond to time of day.) Press DAY/TIME OR, if ad- justing for daylight savings time, pressing ENTER stores the single change and exits to the HOME screen, bypassing minutes and day of week.

2. Minutes will flash. Use the Up/Down arrow buttons to display the minutes past the hour. Press DAY/TIME.

3. Day MO" (Monday) will flash. Use Up/Down arrow buttons to display the current day. Day selections are abbreviated as MO, TU", WE", TH", FR", SA", and SU". Press DAY/TIME.

4. The HOME screen reappears; confirm day and time are correct. This completes day and time setting.

Page 3 L3532H 5/2 DAY PROGRAMMABLE THERMOSTAT

HEAT Using the Heat Mode

Normal Heat Mode In normal heat mode, both the heat pump and the backup heat source are used to provide heat. If the thermostat de-

tects that the heat pump is not able to provide enough heat (as may be the case in very cold weather), then the backup heat source is activated.

Emergency Heat Mode In emergency heat mode, only the backup heat source provides heat the heat pump is disabled. The backup heat source is activated only when there is a heat demand.

Enabling Normal Heat Mode

Use the HEAT button to select normal heat mode, emer- gency heat mode, or to disable heat modes as desired. If the thermostat is in OFF or COOL mode, pressing the Heat

button enables Heat mode. This is indicated by HEAT in the SYSTEM box as shown in figure 4.

Heat

Prog

Fan

Settings

Cool

Day/Time

Hold

Enter

5:30

66 70

HOLD

AM PM

SETPOINT ROOM

FAN

AUTO

SYSTEM

HEAT

MO

Figure 4. Turn Heat ON/OFF

Enabling Emergency Heat Mode

If the thermostat is in heat mode, pressing the Heat button

enables EMG. HEAT mode (see figure 5). If the thermostat is in normal heat mode when the HEAT button is pressed, then emergency heat mode is enabled.

SYSTEM COOL OFF EMG. HEAT62

ROOM

75 SETPOINT

Figure 5. Emergency Heat Mode Enabled

Disabling Heat Mode

If the thermostat is in emergency heat mode when the HEAT button is pressed, then heat modes are disabled.

This is indicated by OFF in the SYSTEM box as shown in figure 6.

SYSTEM COOL OFF

HEAT75 ROOM

75 SETPOINT

Figure 6. Heat Mode Disabled

Heating Demand

The thermostat must be in either normal or emergency heat mode in order to properly control the heating equip- ment. In either heat mode, when the actual temperature is

lower than the temperature setpoint (as shown in figure 7), the thermostat detects a heating demand and activates the heating equipment to satisfy the demand. Heating opera- tion is indicated by a flame icon in the SYSTEM box.

SYSTEM COOL OFF

HEAT72 ROOM

75 SETPOINT

Figure 7. Heating Demand

When the actual temperature rises above the temperature setpoint, the flame icon will disappear. This indicates that the heating demand has been satisfied and that the heat- ing equipment has been turned off.

Heat pump operation is locked out for 5 minutes after a de- mand has been satisfied. If another heat pump demand occurs during this 5minute interval, the flame icon will flash; however, the heat pump will not run until the 5min-

ute delay has elapsed.

NOTE The heat pump is activated for at least 4 minutes if

no buttons are pressed during the demand interval. The

backup heat source is activated for at least 3 minutes if no

buttons are pressed during the demand interval.

If your system supports 3stage heating (as does the L3532H thermostat), you may notice various heating lev- els being delivered during a demand.

If a small heat pump heating demand is present, "Lo" is dis- played in the SYSTEM box; if a large heat pump heating demand is present, "Hi" is displayed (see figure 8).

65 ROOM

75 SETPOINT

SYSTEM COOL OFF

HEAT

Hi

Figure 8. Large Heat Demand

Page 450607401 02/08

COOL Using the Cool Mode

Enabling and Disabling Cool Mode

Use the COOL button to enable or disable cool mode as

desired. If the thermostat is in HEAT or OFF mode, cool mode is enabled when the COOL button is pressed. This is indicated by COOL in the SYSTEM box (see figure 9).

I0:30

75 70

HOLD

AM PM

SETPOINT ROOM

MO

Heat

Prog

Fan

Settings

Cool

Day/Time

Hold

Enter

FAN

AUTO

SYSTEM COOL

Figure 9. Turn Cool ON/OFF

If the thermostat is in cool mode, pressing the Cool button

disables COOL mode (indicated by OFF in the SYSTEM box see figure 10).

SYSTEM COOL OFF

HEAT75 ROOM

75 SETPOINT

Figure 10. Cool Mode Disabled

Cooling Demand Set the thermostat to cool mode to control the cooling equipment. Then, if the room temperature is higher than the temperature setpoint, as shown in figure 11, the ther- mostat detects a cooling demand and will activate the cool-

ing equipment to satisfy the demand.

75 ROOM

70 SETPOINT

SYSTEM COOL OFF

HEAT

Figure 11. Cooling Demand

Cooling operation is indicated by flashing snowflake" icons in the SYSTEM box. When the actual temperature drops below the temperature setpoint, the snowflake icons will disappear. This indicates that the cooling demand has been satisfied and that the cooling equipment has been turned off.

If your system supports 2stage cooling (as does the

L3532H thermostat), you may notice various cooling levels being delivered during a demand. Also, if a small cooling demand is present, "Lo" will be displayed in the SYSTEM box. However, if a large cooling demand is present, "Hi" will be displayed in the SYSTEM box (shown in figure 11).

NOTE If no buttons are pressed during a demand for

cooling, the equipment must operate for at least 4 minutes.

After a demand has been satisfied, cooling equipment op-

eration is locked out for 5 minutes. If another cooling de-

mand occurs during this 5minute interval, COOL" and the

snowflakes will flash; however, the cooling equipment will

not operate until the 5minute delay has elapsed.

Page 5 L3532H 5/2 DAY PROGRAMMABLE THERMOSTAT

HOLD Using Temperature Hold Modes

When HOLD is displayed at the HOME screen, the ther- mostat is in a temperature hold condition. This means that

the temperature program data is ignored and the thermo- stat functions much like a nonprogrammable thermostat.

Adjusting Temperature Setpoint in Hold Mode

The temperature setpoint represents the desired tempera-

ture of the space around the thermostat. The default tem- perature setpoint in Hold mode is 70F.

To adjust the setpoint, press the UP or DOWN () arrow buttons (see figure 12); the existing setpoint is displayed to the right of the actual room temperature. Each button press adjusts the setpoint up or down by 1 degree.

Heat

Prog

Fan

Settings

Cool

Hold

Enter

Day/TimeI0:36

72 68

HOLD

AM PM

SETPOINTROOM

MO

FAN

AUTO

SYSTEM COOL

Figure 12. Hold Temperature Mode

After the desired setpoint is reached, the HOME screen will reappear after about 15 seconds.

Permanent Hold Mode

At any time the program is running, from the HOME screen, set a permanent hold (program override) by press- ing the HOLD button (see figure 12). The thermostat now functions much like a nonprogrammable thermostat. Use the Up/Down arrow buttons to adjust the hold setpoint. To

return to the program, press HOLD again.

Temporary (2-Hour) Hold

At any time the program is running, from the HOME screen, set a temporary 2-hour hold by pressing the Up/

Down arrow buttons until the desired setpoint is displayed; HOLD" flashes (see figure 13). This overrides the pro- gram for 2 hours from the last button press, then returns to the program.

Heat

Prog

Fan

Settings

Cool

Hold

Enter

Day/TimeI0:36

72 68

AM PM

SETPOINTROOM

MO

FAN

AUTO

SYSTEM COOL

PROG B HOLD

Figure 13. Temporary Hold Temperature Mode

While in Temporary Hold, press HOLD once to switch to Permanent Hold (HOLD displays solid; PROG not dis- played); press HOLD again to return to the program

(PROG displays; HOLD not displayed).

PROG Thermostat Programming

The L3532H thermostat can be programmed to perform a set of either heating or cooling events (but not a

combination of heat and cool) for 5 consecutive days using a set of 4 unique events per day. The remaining 2 days can then be set for a different set of 4 unique events per day. Both the consecutive days and the events/temperature are set by the homeowner.

To Change Consecutive Days...

To alter the 5 consecutive days, press and hold the PROG button for 5 seconds. The 5 consecutive day period is then displayed (default is MOnday thru FRiday). To change to a different 5-consecutive days, use the Up/ Down arrow buttons. Any 5 consecutiveday span may be selected, for example, in figure 14, Saturday through Wednesday is defined as the 5day programming (Thurs-

day and Friday would constitute the 2day programming). Press the PROG button when finished.

FILTER MO TU WE TH FR SA SU

Figure 14. Change Consecutive days

To Set Program Events and Temperatures...

Figure 15 gives an example of how the two sets of pro-

grams can be set for a normal workweek and weekend.

In the 5day bar graph, note how programs A and C reflect the desired warmth while the home IS occupied (72); B allows less heating while the home is NOT occupied; D re- flects a cooler sleeping temperature. The 2day bar graph would support daylong occupancy and, because the first

program begins later, a lessdemanding time schedule.

5DAY PROGRAM:

72

68

64

| A | B | C | D |

2DAY PROGRAM:

72

68

64

| A | B | C | D |

6AM NOON 6PM MID 6AM NIGHT

6AM NOON 6PM MID 6AM NIGHT

Figure 15. 5/2 Day Program Example

NOTE Pressing ENTER during the following program-

ming steps, saves and exits to the HOME screen.

To program events and temperatures, perform the follow- ing steps, once with Cool selected and once with Heat se-

lected.

1. Press and release PROG. AM 6:00", period A", and the 5 consecutive days are displayed; AM 6" flashes.

2. Use the Up/Down arrow buttons to select the desired hour; press PROG when the desired hour is reached.

3. Use the Up/Down arrow buttons to select the desired minute; press PROG.

4. Use the Up/Down arrow buttons to select the desired temperature setpoint; press PROG.

Page 650607401 02/08

5. Repeat steps 2 through 4 for periods B, C, and D.

6. Repeat steps 1 through 5 for the 2day program.

NOTE This thermostat will NOT automatically switch

from heating to cooling, or vice versa; operator involve-

ment is required. At the change of seasons, or to accomo-

date abnormal seasonal temperature swings, you must

manually select to the opposite conditioning (Heat or Cool)

program.

FAN Controlling the Fan Operation

Use the FAN button to select either continuous fan mode or auto fan mode.

To change from continuous to auto fan mode (or vice ver- sa), press the FAN button. Note whether a fan icon in the FAN box is present (indicating that the fan is running) or not (fan not running).

If continuous fan mode is enabled (ON displayed in FAN box see figure 16), the fan will run continuously regard- less of whether the heating or cooling equipment is run-

ning.

Heat

Prog

Fan

Settings

Cool

Hold

Enter

Day/TimeI0:I0

67

PROG B

AM PM

ROOM

FAN ON

SYSTEM

HEAT

MO

Figure 16. Using Fan ON

If auto fan mode is selected (AUTO displayed in FAN box

see figure 17), the fan will only run when the heating or cooling equipment is running.

Heat

Prog

Fan

Settings

Cool

Hold

Enter

Day/TimeI0:36

72

AM PM

ROOM

MO

FAN

AUTO

SYSTEM COOL

PROG B

Figure 17. Using Fan AUTO

SETTINGS Filter/Maintenance Reminders

The L3532H thermostat is designed to remind you when the filter needs changing or when routine maintenance is required, as (and if) defined, by you. These optional re-

minders are not enabled until you activate them. To do so, press the Settings button (shown below the Fan button in figure 17) once or twice for the desired reminder as shown in figure 18 and as described in table 1.

FILTER

OFF MAINT

For FILTER, press Settings button 1 time

For MAINT, press Settings button 2 times

Figure 18. Reminder Settings Display

The default setting for the reminders is OFF (disabled). Press Up/Down arrow buttons to select the desired re- minder intervals.

Table 1. Filter and Maintenance Reminders

Buttons to Use

Reminder Available Settings and How to Use

Settings (1st press)

FILTER Total fan run time expressed in months (Off 1 3 6 12); for

then Arrows to scroll

, , , , example, if fan runs 12 hours a day 1 month reminder displays

selections ,

in 2 calendar months.

Settings (2nd press)

MAINT Elapsed chronological time in months (Off 6 12) Use this

then Arrows to scroll

, , . , for example, to remind yourself when to perform routine checks

selections

or when to call a technician for di tipero c preven ve

maintenance.

Enter Stores settings.

NOTE The HOME screen will reappear about 15 seconds

after the final arrow button press. OR, press ENTER at any

time to store any changes and exit to the HOME screen.

After either programmed interval has elapsed, the remind- er will be displayed as shown in figure 19.

I0:i2 PROG A B C D HOLD

FAN ON AUTO

SYSTEM COOL OFF

HEAT78 ROOM

SERVICE

FILTER

AM PM

MO TU WE TH FR SA SU MAINT

Figure 19. Reminders

After the filter has been changed or maintenance per- formed, reset the reminder by pressing the SETTINGS button for 4 seconds. The screen will blink for a few mo- ments to indicate that the timer has been reset.

Page 7 L3532H 5/2 DAY PROGRAMMABLE THERMOSTAT

SETTINGS Balance Point

NOTE The balance point is only available with the out-

door sensor.

If the optional outdoor sensor (X2658) is connected to the thermostat, balance point adjustment is available. The bal- ance point feature allows the measured outdoor tempera-

ture to govern operation of the heat pump and backup heat source.

Use the SETTINGS button to access the balance point setting. If the outdoor sensor is attached to the thermostat, press the SETTINGS button three times to access the Bal- ance Point Settings screen (see figure 20).

ROOM

55 SETPOINT

6p Figure 20. Balance Point Setting

The balance point can be set at any temperature between 1F and 55F (17C to 13C). A balance point setting of

zero disables the balance point function (in this case, the thermostat behaves as if no outdoor sensor is attached). The default balance point setting is 55F.

To adjust the balance point up or down, press the Up/Down arrow buttons to the right of the display screen. The bal- ance point setting increases by 1F each time the Up but- ton is pressed and decreases by 1F each time the Down

button is pressed.

After the desired balance point is reached, the HOME screen will reappear after about 15 seconds.

NOTE The balance point feature allows the outdoor tem-

perature to rise or fall 3F above or below the balance

point. This prevents excessive cycling of the equipment

when the outdoor temperature is near the balance point.

For example, if the balance point is 40F and the actual

outdoor temperature is 35F, the outdoor temperature

must rise to 43F before equipment adjustment occurs.

Conversely, if the balance point is 40F and the actual out-

door temperature is 45F, the outdoor temperature must

drop to 37F before equipment adjustment occurs.

Service Indicator

When abnormal equipment operation is detected, the

SERVICE indicator will flash on the screen (see figure 21). This indicates that the equipment requires service from a qualified service technician.

I0:i4 PROG A B C D HOLD

79 ROOM

SERVICE

FILTER

AM PM

FAN ON AUTO

SYSTEM COOL OFF

HEAT

MO TU WE TH FR SA SU

Figure 21. Service Indicator Flashing

Thermostat RESET

Under some abnormal conditions, it may be necessary to reset" the thermostat to its default condition. Such a RE-

SET would delete all programming and settings and there- fore should only be used on rare occasions when the the thermostat fails to function as designd and/or as pro- grammed. Such an instance can occur as a result of a pow- er surge or similar electrical disturbance (e.g. after an elec- trical storm or power outage). The RESET button can be

used to recover from this situation.

CAUTION When the RESET button is pressed, ALL settings re- vert back to the defaults, including the default pro- gram (see tables 2 and 3).

The RESET button is an unlabeled, recessed button lo-

cated behind the door, on the righthand side of the ther- mostat, below the SETTINGS button (see figure 3). Use a paper clip or small pencil to press the RESET button; ALL thermostat settings will be reset to the defaults listed in the Default Thermostat Settings section.

Removing/Installing Thermostat

The thermostat hinges on tabs on the top of the subbase; no tool is needed to remove the thermostat from the sub- base. Pivot the bottom of the thermostat outward (releas- ing the snaps), then lift up to remove.

To replace it, first position the top tilted toward the wall

bracket and align it until you feel the tabs and slots engage; then, while the top is in place, pivot the bottom toward the wall until the thermostat snaps into place.

Page 850607401 02/08

Default Thermostat Settings

Default thermostat settings are shown in table 2 and the default program is shown in table 3.

Table 2. Default Thermostat Settings

Mode Heat (Permanent Hold Mode)

Setpoint 70F (or 21C)

Fan Auto

Filter Reminder OFF

Maintenance Reminder OFF

Equipment Protection Timers

Reset Back to Zero

Table 3. Default Program Settings

Programs Time Temperature (Heat)

Temperature (Cool)

Weekday A 6:00am 70F / 21C 78F / 26C Weekday B 8:00am 62F / 17C 85F / 29C Weekday C 6:00pm 70F / 21C 78F / 26C Weekday D 10:00pm 62F / 17C 82F / 28C Weekend A 6:00am 70F / 21C 78F / 26C Weekend B 8:00am 62F / 17C 85F / 29C Weekend C 6:00pm 70F / 21C 78F / 26C Weekend D 10:00pm 62F / 17C 82F / 28C Weekday Monday, Tuesday, Wednesday,

Thursday, Friday

Weekend Saturday, Sunday

Technical Specifications

Thermostat Type

Electronic programmable thermostat for heat pump, 3-stage heat/2-stage cool.

NOTE 2 stages of heat pump heat and one stage of auxil-

iary (gas or electric) backup heat are supported.

Power Supply Range

18VAC 30VAC (24VAC nominal), 60Hz

CAUTION 24VAC is present on the terminals of the thermostat bracket. If removing the thermostat from the wall, use caution and avoid touching any of the connec- tor terminals on the wall bracket.

Also, when working with the thermostat dip switches, use a nonconductive tool and take cau- tion to avoid making any contact with the circuit board, its imprinted circuitry and its connector prongs.

Temperature Display

Display Scale: Fahrenheit or Celsius user selectable (via DIP switch; see figure 22) Display range: 35F (2C) to 99F (37C) Display resolution: 1F (1C) Display Accuracy: +/1F

If the Fahrenheit/Celsius display must be changed, use a plastic, nonconductive tool to push the dip switch to the

right position (see figure 22).

F/C (Fahrenheit/Celsius) switch shown in Celsius position

1

2

3

4

5

6 PLUG IN (Use Care To Avoid Bending Prongs.)

Figure 22. Changing Fahrenheit/Celsius Setting

Temperature Measurement Range Measurement Scale: Fahrenheit

Measurement Range: 35F to 99F Measurement Resolution: 0.5F Measurement Accuracy: +/1F Field Offset: via DIP switches to +/3F Sampling Method: temperature measurements sampled every 15 seconds. Displayed temperature is the average of the last four measurements.

Temperature Setpoint Range Setting range: 50F (10C) to 90F (32C)

Setting resolution: 1F (1C)

Page 9 L3532H 5/2 DAY PROGRAMMABLE THERMOSTAT

Smart Setback Recovery (via DIP switch #6) Smart Setback Recovery (SSR) affects the way the ther- mostat responds to program events. If SSR is disabled, the thermostat will react to a program event at the time the event occurs. However, if SSR is enabled, the thermostat

will react to a program event before the event occurs such that the desired temperature is reached at the time of the event, not after.

Fan Control AUTO or ON modes.

I/O Relays All thermostat relays are latching type to minimize power consumption.

Table 4. L3532H Terminal Designations

Term. Description

B Reversing valve, heat active

O Reversing valve, cool active

R 24VAC

Y1 First-stage cooling/heating, compressor energized

W1* Auxiliary heating, furnace energized

Y2 Second-stage cooling/heating, compressor energized

E* Emergency heat

G Fan control

L Service Indicator

C 24VAC common

T Outdoor temperature sensor connection 1

T Outdoor temperature sensor connection 2

* For most applications, E will be jumpered to W1. If sep-

arate wires are not provided for both E and W1, jumper

the E terminal to the W1 terminal on the thermostat sub-

base. For applications involving the use of a balance

point (whereby the outdoor temperature is to be used to

restrict either heat pump operation or backup heat

source operation), the optional outdoor sensor (part

number X2658) MUST be installed.

Equipment Protection Timers Minimum Compressor OFF time: 5 minutes Minimum Compressor ON time: 4 minutes

Minimum Furnace ON time: 3 minutes

Minimum furnace cycle time (elapsed time between any furnace activation and the next furnace activation): 6 min- utes.

Minimum elapsed time between any compressor activa- tion and the next compressor activation: 6 minutes.

NOTE All protection timers (except the compressor OFF

timer) can be overridden if a heating or cooling demand is

initiated or terminated using the UP, DOWN, HEAT, or

COOL buttons.

Equipment Protection Override

Both the minimum compressor OFF timer and the mini- mum equipment cycle timer can be overridden by press- ing and holding either the HEAT or COOL button down for 4 seconds.

OverTemperature Protection

Thermal-mechanical switch opens W1, Y1, Y2, and E at 93F+/6F.

Filter Reminder

Settings of Off, 1, 3, 6 or 12 (months of fan run time) are available. When programmed time has elapsed, a FILTER indicator is displayed.

Maintenance Reminder

Settings of Off, 6 or 12 (months of chronological time) are available. When programmed time has elapsed, a mainte- nance indicator MAINT" is displayed.

Service Reminder

The SERVICE indicator is displayed only under the follow-

ing conditions:

if the thermostat Y1 terminal has been activated with 24VAC for at least 5 minutes, AND the L terminal is shorted to the R terminal;

OR

if the thermostat Y1 terminal has been activated with 24VAC for at least 5 minutes, AND the L terminal is shorted to the C terminal.

Power Loss/Recovery

Thermostat memory is retained for a minimum of 24 hours during a power loss (includes retention of program infor- mation, HOLD status, programmed temperature setpoint, heat/cool and fan mode settings, filter reminder status, maintenance reminder status, and equipment protection

timers). After 24 hours of power loss, programmed settings will be lost and replaced with default settings.

IMPORTANT Power must be applied for at least six consecutive hours prior to a power loss in order for memory to be retained for the specified time.

LCD Backlight

Activated for 30 seconds when any button is pressed.

NOTE During an electrical storm or similar disturbance,

the backlight may activate for a few seconds. This is nor-

mal and will no longer occur after the electrical disturbance

has passed.

Thermostat Operating Conditions

35F to 105F, 5% to 90% RH

Thermostat Storage Conditions

40F to 185F, 5% to 95% RH

Page 1050607401 02/08

Thermostat Output Table

Table 5 depicts the L3532H thermostat output states for

various input conditions. The following notes described terms used in the table.

NOTES:

X = output is activated with 24VAC.

BBP: outdoor temperature is below balance point

ABP: outdoor temperature is above balance point

In all cases, the state of the B terminal is opposite that of the O terminal

Data are tabulated for AUTO fan setting. If the fan set- ting is ON, the G output is activated in all cases

Upstage timers:

30 minutes (when upstaging from small to large demand)

15 minutes (HEAT MODE ONLY when upstaging from large to very large demand)

The temperature ranges expressed in the following definitions of SMALL/LARGE/VERY LARGE" de- mands are for guidance only; actual temperatures may vary:

With a small HEAT demand, temperature is: below setpoint 0.5F but above setpoint 1.5F AND 30-minute upstage timer HAS NOT expired.

With a large HEAT demand, temperature is: less than setpoint 1.5F OR 30-minute upstage timer HAS expired.

With a very large heat demand, temperature is: below setpoint 2.5F OR 15minute 2nd upstage timer HAS expired.

Emergency heat demand (only if emergency heat is enabled): temperature is below setpoint 0.5F.

With a small COOL demand, temperature is: above setpoint +0.5F but below setpoint +1.5F AND 30-minute upstage timer HAS NOT expired.

With a large COOL demand, temperature is: above setpoint +1.5F OR 30-minute upstage timer HAS expired.

Table 5. L3532H Thermostat Outputs

Demand Condition W1 E Y1 Y2 G O

Cooling Demands

SMALL X X X

LARGE X X X X

No Demand X

Heating Demands

w/Electric Backup (no outdoor sensor)

SMALL X X

LARGE X X X

Very LARGE X X X X

Emergency X X

No Demand

w/Gas Backup (dual fuel; no outdoor sensor)

SMALL X X

LARGE X X X

Very LARGE X

Emergency X

No Demand

w/Electric Backup (outdoor sensor attached)

SMALL (Above Balance Point) X X

LARGE (ABP) X X X

Very LARGE (ABP) X X X

SMALL (Below Balance Point) X X

Manualsnet FAQs

If you want to find out how the ComfortSense 3000 Series Lennox works, you can view and download the Lennox ComfortSense 3000 Series Operation Manual on the Manualsnet website.

Yes, we have the Operation Manual for Lennox ComfortSense 3000 Series as well as other Lennox manuals. All you need to do is to use our search bar and find the user manual that you are looking for.

The Operation Manual should include all the details that are needed to use a Lennox ComfortSense 3000 Series. Full manuals and user guide PDFs can be downloaded from Manualsnet.com.

The best way to navigate the Lennox ComfortSense 3000 Series Operation Manual is by checking the Table of Contents at the top of the page where available. This allows you to navigate a manual by jumping to the section you are looking for.

This Lennox ComfortSense 3000 Series Operation Manual consists of sections like Table of Contents, to name a few. For easier navigation, use the Table of Contents in the upper left corner.

You can download Lennox ComfortSense 3000 Series Operation Manual free of charge simply by clicking the “download” button in the upper right corner of any manuals page. This feature allows you to download any manual in a couple of seconds and is generally in PDF format. You can also save a manual for later by adding it to your saved documents in the user profile.

To be able to print Lennox ComfortSense 3000 Series Operation Manual, simply download the document to your computer. Once downloaded, open the PDF file and print the Lennox ComfortSense 3000 Series Operation Manual as you would any other document. This can usually be achieved by clicking on “File” and then “Print” from the menu bar.