CT2400

PROGRAMMABLE

THERMOSTAT

BY HONEYWELL

Weekday/Weekend (5-day/2-day)

Programmable Heat and/or Cool

Low Voltage (20 to 30 Vat)

Thermostat and Mounting Plate

Model CT2400

PROGRAMMING AND INSTALLATION

INSTRUCTIONS

2

3

Limited One-Year Warranty

Honeywell warrants this prcduct, excluding battery, to be free from defects in the workmanship or materials, under normal use and sewice, for a pericxl of one (1) year from the date of purchase by tha consumer. If, at any lime during the warranty period, the product is defective or malfunctions, Honeywell shall repair or replace it (at Honeywel~s option) within a reasonable period of time.

[t the product is defective,

(i) retUrn it, with a bill of sale or,other dated prcof of purchase, to the retailer from which you purchased it, or

(ii) package it carefully, af0n9 wdh Proof of purchase (including date of purchaae) and a short description of the ma ffuncf ion, and mail it, postage prepaid, to the following address

Honaywall Inc.

in Canada: Honeywell Limited/Honeywell Limit6e

Return Goods Department Product Services ON 15-FFE

1050 13erkafdre Lane

Plymouth, MN 55441-4437

74o Ellesmere Road

Scarborough, Ontario Ml P 2V9

This warranty does not cover removal or reinstallation coats. This warranty shall not apply if It is shown by Honeywell that the defect or malfunction was caused by damage which occurred while the product was in the possession of a consumer.

Honeywell’s sole responsibility shall be to repair or replace the product within the terms stated above. HONEYWELL SHALL NOT BE LIABLE

FOR ANY LOSS OR DAMAGE OF ANY KIND, INCLUDING ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING, DIRECTLY

OR INDIRECTLY, FROM ANY BREACH OF ANY WARRANTY, EXPRESS OR IMPLIED, OR ANY OTHER FAILURE OF THIS PRODUCT.

Some states do not allow the exclusion or limitation of incidental or consequential damages, so this limitation may not apply to you.

THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE DURATION OF ANY IMPLIED wARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILIV AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY

LIMITED TO THE ONE YEAR DURATION OF THIS WARRANTY. Some states do not allow Ilmitafions on how long an implied warranty lasts, so the above limitation may not apply to you.

This warranty givas you specific legal rights, and You may have other r!ghts which vary from state to state.

If you have any questions concerning this warranty, please write our Customer Assistance Center, Honeywell Inc., P.O. Box 524, Minneapolis,

MN 55440-0524 or call 1-800-468-1502, Monday-Friday, 7:00 a.m. to 5:30 p.m., Central time. In Canada, write Retail Products ON1 5-02H,

Honeywell LimitecUHoneywell Limitee, 740 Ellesmere Road, Scarborough, Ontario Ml P 2V9.

35

TYPICAL ENERGY SAVINGS FOR REPRESENTATIVE CITIES IN THE U.S. AND CANADA

SaviW

for

Gnc3-A.Oay

l&F [5*C] d—

SawrQSfciTv4c=3A-CUIy’ l&F [5-C] decrease.

so%

~za%

H fi

Q

Thermostat patents pending.

“~~ m lwF [50CI dncrease+~F [*C] deciease grfes WP+vxlmateiy 55 pemml ol these savings.) ~z,,~h

Printed in U.S.A. G.S. 7-93 @Honeywell Inc. 1993

Welcome to the world of comfort and energy savings with your new Honeywell

[email protected] programmable thermostat.

Your new thermostat will automatically control the temperature in your home, keeping you comfortable while saving energy when programmed according to the instructions in this manual.

Direct any questions concerning the application of this thermostat to Honeywell

Customer Assistance at 1-800-468-1502,

Monday-Friday 7:00 a.m.-53O p.m., Central time.

@ RECYCLING THERMOSTAT

If this thermostat is replacing a thermostat that contains mercury in a sealed tube (see illustration below), do not place your old thermostat in the trash. Contact your Jocal waste management authority for instructions regarding the recycling and proper disposal of your old thermostat.

If you have questions, call Honeywell Inc.

at 1-800-468-1502.

Typical location of a mercury switch in a thermostat.

MERCURY

SWITCH

o

0

—.

M3701

Table Of Contents

STEP 1 Prepare For Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...2

STEP 2 Remove Old Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

STEP 3 Install The Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

STEP 4 Program The Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

STEP 6 Adjust System On-Time, As Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

STEP 7 Mount Thermostat Mounting Plate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

STEP 9 Mount The Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...24

STEP 10 Check Thermostat Operation After Programming And installing . . . . . . . . . . . . . . . . . . . . . . ...25

STEP 11 Set The Fan And System Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...27

Troubleshooting Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...29

Limited One-Year Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

1

Acquire tools and items below as needed. Also purchase two AA alkaline batteries; we recommend Energizer batteries.

~

CROSS-RECESSED

SCREWDRIVER

“(~,

.

iiAND OR POWER

DRILL WITH 3/16 INCH

DRILL BIT, IF NEEDED, TO

DRILL HOLES IN WALL

T

~

~AsKING TAPE

,F

WIRE CUTTEWSTRIPPER OR SHARP

KNIFE, IF NEEDED, TO STRIP WIRES

NEEDED, TO Ll&EL WIRES

AS DISCONNECTED FROM

OLD THERMOSTAT

UIall

ulEa-’-U

LEVEL, IF NEEDED, TO LEVEL

THERMOSTAT FOR APPEARANCE

3

M378B

~ Prepare For Installation

Check Table 1 to make sure this thermostat is compatible with your system. If it is not, return to retailer. For more information, call Honeywell Customer Assistance, toll-free 1-800-468-1502.

TABLE 1 -COMPATIBILITY CHART.

System Type

Gas-Standin~ Pilot

Gas-Electro~c Ignition

Gas-Fired Boilers

Gas—Millivolt

Oil-Fired Boilers

OWired Furnace

Electric Furnace

Electric Air Conditioning

Baseboard Electric (120/240 Line Volt)

Heat PumpdMultistage Equipment

.,-. -- ——-., I-,- . . . ..L ---- .fin/n”n .._i. -:.-..:.

I al~+u VUIL cxrum.

Compatible With CT2400

Yes

EA A

Y:AA

Yes

Yes

Yes

No

No

~Compatible with 2-wire Honeywell zone valves. Isolating relay required for3-wire thermostats for zone valves. Not compatible with 2-wire White-Rodgers no. 1361 valves.

~Compatible with hot water baseboard systems. Will not work efficiently on steam or gravity systems.

7

_ Remove Old Thermostat

[1 Test to make certain that your heating and cooling systems are working properly. If either does not work, contact your local heating/air conditioning dealer. To avoid compressor damage, do not operate the cooling system when outdoor temperature is below 50° F[10° C].

TURN OFF POWER to system at the furnace, or at the fuse/circuit breaker panel.

U Carefully unpack your new thermostat and mounting plate; save the package of screws, instructions and receipt.

U Remove cover from old thermostat. If it does not snap off when pulled firmly from the

bottom, check for a screw used to lock on the cover.

Loosen screws holding thermostat to subbase, wallplate or wall, and lift away.

U Disconnect wires from old thermostat or subbase. As you disconnect each wire, use masking tape to label it with the old terminal designation. If there are only two wires, they do not need to be labeled. If there is an extra wire that is not connected to your old thermostat, you will ako not be connecting it to your new thermostat. Keep the wires from falling back into the wall by wrapping them around a pencil as shown.

4

——. .

Replacing a Clock Thermostat that has C or Cl Clock Terminals?

If you are replacing a Honeywell

[email protected] Thermostat, you may find one or two wires that go to the C or Cl clock terminals on the Chronotherm Thermostat wiring wallplate. Do not allow them to touch, or you may damage your transformer.

Disconnect the wires and wrap them separately, using electrical tape. Do not wrap them

together. Place the wires where they will not interfere with the operation of the new thermostat. Record the colors and terminal designation labels of the remaining wires.

Six or more wires?

If there are six or more wires (excluding clock wires attached to terminals), you most likely have a variation of a heat pump or multistage system. The thermostat is not compatible with such systems so return the product to the place of purchase. If you would like information about which programmable thermostats will work with your system, call Honeywell Customer Assistance at

1-800-468-1502.

Three thermostat wires?

If you have three wires for heating only and can operate the fan using the fan ON switch, this thermostat will work with your system.

However, some hot water (zoned) heating systems have three thermostat wires. The thermostat will not work without installing an isolating relay on these systems. For details, call Honeywell Customer Assistance at 1-800-

468-1502.

5

_ Install The Batteries

IMPORTANT: Batteries must be installed for programming and operation of the thermostat and heating/cooling system.

A

Purchase two AA alkaline batteries; nonalkaline batteries will not last as long, and may leak, causing damage to thermostat or wall surface. We recommend Energizer batteries.

•l Make sure the thermostat is set in the OFF position.

El Use a coin to remove battery door.

Install the fresh batteries as shown, making sure positive and negative terminals are oriented correctly.

O Replace battery door.

6

\

M1779B

As the batteries are running low, a “bAt Lo” indicator will flash for one to two months before batteries run out completely. Replace the batteries as soon as possible after the indicator starts flashing. If you do not replace the batteries sometime during the flashing

“bAt Lo,” the indicator will eventually stop

flashing. “bAt Lo” will stay on without flashing,

indicating the thermostat and heating/cooling system have stopped working and the batteries are almost completely dead.

After the batteries are completely dead, the

“bAt Lo” indicator will disappear, leaving a completely blank display.

Press down on left ends of batteries to remove. If you insert the new batteries within

INSTALL TWO AA ALKALINE

/BATTEFIIESASStiOIAIN

a:

E=l

20 to 30 seconds of removing the old ones, you will not have to reprogram the thermostat.

However, if the display is blank, the batteries are dead or incorrectly installed, and you will have to reprogram. See pages 12 and 13 to reprogram.

IMPORTANT: Although the thermostat has a low battery indicator, replace the batteries once a year to prevent the thermostat and heatinrjcooling system from shutting down due to lack of battery power.

As a precaution, when leaving home for longer than a month, change batteries before you leave to prevent the system from shutting down due to lack of battery power.

M171

7

- Program The Thermostat

After the batteries are installed, the thermostat can be easily programmed in your hand before it is installed on the wall.

If you would prefer to program the thermostat after it is installed on the wall, skip to page 8, and return later to this programming section.

The following personal programming chart

(pages 10 to 11 ) may be helpful for planning your program schedule of time and temperature settings for various times of the day.

Four time periods are available during weekdays — “WAKE,” “LEAVE,” “

RE

-

TURN,” and “SLEEP.” These periods can be seen individually on the display as you press the SET SCHEDULE key.

n

‘WAKE” is the time period you want the house at a comfortable temperature when you get up and while you get ready for work or school. (This will be a higher temperature during heating season, or a lower temperature during cooling season.)

“LEAVE” is the time period you can set for an energy-saving temperature while you are away at work or school. (This will be a lower temperature during heating season, or a higher temperature during cooling season.)

“RETURN” is the time period you want the house at a comfortable temperature for activities before bedtime. (Again, higher heat or lower cool.)

“SLEEP” is the time period you can set for an energy-saving temperature while you are

sleeping. (Again, lower heat or higher cool.

For more comfortable sleeping, some people choose not to raise the cool temperature during the night.) require it. For example, a house that is occupied during weekdays would only require programs for “WAKE and “SLEEP.”

You will set one schedule for weekdays and another for weekends, because your requirements will probably be different for each.

During weekends, only the “WAKE and

“SLEEP time periods are available.

Fill in the times and temperatures you desire for weekdays and weekends. If you decide not to program the thermostat, it will automatically control heating at 68° F [20° C], and cooling at

78° F [26° C], 24 hours a day. Also, you do not need to enter a time and temperature program for all periods if your schedule does not

If no program is entered for the weekends, the thermostat will operate on the weekday

“SLEEP program all weekend.

When pressing the keys, use the ball of your finger or a soft pencil eraser. Use of sharp fingernails or pencil points can damage the keypad.

If you make an error at any time during programming, just press the RUN PROGRAM key, and continue again at the step where you left off.

9

Personal Programming Chart

HEATING PROGRAM

Start Time Heating Temperature

A

Weekdays

WAKE

LEAVE

RETURN

SLEEP

WAKE

SLEEP

~ If you decide not to enter weekend programs, SLEEP from the weekday program will copy to the weekend schedule.

~ The

temperatures

cannot be set any higher than 88° F [31° C] or any lower than

45° F [7: C].

10.—

.—

COOLING PROGRAM

Start Time

Cooling Temperature~

Weekdays

WAKE

LEAVE

RETURN

SLEEP

Weekends ~

WAKE

SLEEP

~ If you decide not to enter weekend programs, SLEEP from the weekday program will copy to the weekend schedule.

~ The temperatures cannot be set any higher than 88° F [31

0

C] or any lower than 45° F [7° C].

NOTE: If you decide not to program the thermostat, it will automatically control heating at

68° F [20° C], and cooling at 78° F [26° C], 24 hours a day.

11

Weekdays

WAKE

LEAVE

RETURN

SLEEP

COOLING PROGRAM

Start Time

Cooling Ternperature~

Weekends~

WAKE

SLEEP

~ If you decide not to enter weekend programs, SLEEP from the weekday program will copy to

the weekend schedule.

~ The temperatures cannot be set any higher than 88° F [31

0

C] or any lower than 45° F [7° C]

NOTE: If you decide not to program the thermostat, it will automatically control heating at

68° F [20° C], and cooling at 78° F [26° C], 24 hours a day.

11

——-

This guide can be used for programming your new thermostat.

NOTE: Batteries are required for operation and programming. When inserting batteries, set system switch to OFF. Remove battery door (on thermostat left side) using a coin at the bottom. Follow instructions on pages 6 and 7.

.—

Set Current Time/Day

T i m e

To set time, press and release ~kwma~ once, o

Time

~

Ahead

0

until current time shows; to set day,

Back n pressandreleasewagain, V until current day shows; then press

p~lm .

n

Back

Heating Program

With system switch at HEAT, press and release ~~uk once. “WAKE,” Mon-Fri and “SET” appear on display.

c 1

12

Temp

Time

Use

c

Ahead

1

to program “WAKE time and

Warmer

0 to program “WAKE” temperature for

Back n

Cooler o

Mon-Fri. Repeat sequence for “LEAVE,” “RETURN,” “SLEEP.”

Time

Ahead

n

to program

Press ~C~~Ub until “WAKE,” “SA SU” and “SET” appear on display. Use

c 1

Temp

Back o

u

“WAKE” time and ,—, to program “WAKE temperature for Sat-Sun. Repeat sequence for “SLEEP.”

u

Cooling Program

With system switch at COOL, follow the same instructions as for Heating Program.

After programming, adjust fan and system switches as desired. Press and release

L-1

to start the program.

13

—-.

A quick guide for operating or making changes follows:

NOTE: System switch must be set to Heat or Cool to perform the following:

Temporarily Change Temperature for Current Period Only—

Temp

— u

Cmlar n

. Temporary indicator will

show on display; it will cancel itself at next scheduled change. To cancel sooner, press

P~&

o

Temp

Hold a Temperature Indefinitely— ~~~P ,

Warmaf

n

u

;

0

14

-

.—

.

Check Current Temperature Setting-

n

(If using Temporarily Change or Hold,

pressing this will cancel your change.)

Run repeatedly to see each time and temperature; then Program .

o

Time

( 1

Beck o

Permanently Change a Program—Repeat steps under Heating Program or Cooling Program

(pages 12 and 13) as applicable.

Return to normal program or start program — u

p;~~m .

Customer Assistance

_ Adjust Fan Operation Switch, As Required

D The thermostat fan operation switch, labeled

FUEL SWITCH (see illustration on page 17) is factory-set in the “F position. This is the correct setting for most systems. If your system is an electric heat system, set the switch to “E. The

“E setting will allow the fan to turn on immediately with the heating or cooling in a system where the “G” terminal is connected.

_ Adjust System On-Time, As Required

El The system on-tim e is facto-~-set for a warm air, gas or oil heating system. If you are installing approximately 360° counterclockwise, or about one complete turn.

it on another type of system, the system on-time must be adjusted accordingly by setting screws A and B on the back of the thermostat. Use the heating system table shown in the illustration,

(page 17) as a guide. The system on-time should be optimized according to the type of system to minimize room temperature swings. Setting the screw “out one turn” means turning the screw

In the unlikely event that you want longer furnace on-time, readjust screws A and/or B as follows:

First, turn both screws in completely, then adjust for system type:

Warm Air Furnace-Set at the Hot Water setting, (A - out one turn, B - in).

Electric Furnace-Leave at the Warm Air

Furnace setting (A - in, B - in).

16

NOTE: This thermostat does not have a setting for steam/gravity air. Cycles would not be long enough for accurate temperature control.

IMPORTANT: When using a high efficiency furnace such as a

90 percent or greater Average

Fuel Utilization Efficiency

(AFUE) unit, adjust screw A

OUT ONE TURN and screw

B IN.

1

1

1

1

1

1

1

1 t

1

THERMOSTAT BACK

.---———

Trcl--- .-:-:----------------–– ~-------,

““’::’’mml

.,W Y G,,’ ;

1

E

[G- I

FUEL SWITCH

-A

F~IE

;5,

;&:%_&

r-

:---

IR 19),

-

Q’

~

Rc :

:

;

1

17

‘ ~ Mount Thermostat Mounting Plate

~

Position mounting plate on wall. Use a level to make sure mounting plate is level. Use a pencil to mark the two mounting holes.

~/

;&ORS

(2)

‘b

— —.

•l Remove mounting plate from wall, and drill

3/1 6 inch holes in wall (if drywall) as marked.

For firmer material such as plaster or wood, drill 7/32 inch holes. Gently tap anchors

(provided) into drilled holes until flush with the wall.

Reposition mounting plate over holes, pulling wires through wiring opening. Loosely insert two mounting screws into holes.

Level for appearance only; thermostat will

function properly even when not level. Tighten mounting screws.

18

(

HI la

— — .

El

LEVEL

) II

,1=

M1714A

19

_ Mount The Thermostat

A.

ENGAGE TABS AT TOP OF

THERMOSTAT AND MOUNTING PLATE.

B.

PRESS LOWER EDGE

OF CASE TO LATCH.

I

NOTE: To remove thermostat from wall, first pull out at

T. >-/ ,., ~-—

J,(4

I I i/

bottom of thermostat, removing top last. *4

—. —— —

C. SWING COVER OPEN

;;~;f;;N. ~

A

_ Mount The Thermostat

A. ENGAGE TABS AT TOP OF

THERMOSTAT AND MOUNTING PLATE.

B.

PRESS LOWER EDGE

OF CASE TO blTCH.

-.

. >-, ,., =

/

J,(4

-–

+

1 c.

NOTE: To remove thermostat from wall, first pull out at bottom of thermostat, removing top last. *4

mm

Check Thermostat Operation

Programming And Installing

After

HEATING

Do not check heating system operation by jumpering thermostat terminals at the primary control such as the gas valve, zone valve,or oil burner control. This will damage the thermostat. Instead, jumper R and W wires at the thermostat.

Temp c

Warmer

1

Temp

Cooler o

25

Move the system switch to HEAT and the fan switch to AUTO.

Press key until the setting is about

10° F [6° C] above room temperature. Heating should start and the fan should run after a short delay

(immediately if fan operation switch is set in E position).

Press key until setting is about 10° F

[6° C] below room temperature. The heating equipment should shut off.

COOLING

To avoid possible compressor damage, do not operate the cooling system when outside temperature is below 50° F

[1 O“ C]. See compressor manufacturer instructions for further information.

NOTE: When cooling setting is changed, thermostat may delay

up to five minutes before turning on the air conditioner.

This delay protects the compressor.

Temp

Coolar n

Temp

Warmer n

Move the system switch to COOL and the fan switch to AUTO.

Press key until setting is about 10°

F [6° C] below room temperature.

The cooling equipment and fan should start.

Press key until the setting is about

10° F [6° C] above room temperature. The cooling equipment and fan should stop.

Move the system switch to OFF with the fan switch still at AUTO.. .

The system and fan should be off.

26

_ Set The Fan And System Switches ,tio on

First set the fan switch.

FAN AUTO: Normal setting for most

■ r homes. A sinale-sDeed fan will turn on ~

automatically-with’air conditioner or furnace. A two-speed fan will usually run on high with air conditioner and on low with furnace.

Exception: When Fan Operation

Switch on back of thermostat is set to

“E” position (see page 16), fan will operate with furnace only.

FAN ON: The fan runs continuously.

Auto On

Use for improved air circulation during ~ special occasions or for more efficient electronic air cleaning. (In a heat-only system, fan will run continuously only when fan relay is connected to the thermostat.)

27

Then set the system switch.

COOL: The thermostat controls your air conditioning system.

OFF: Both the heating and air conditioning systems are off.

HEAT: The thermostat controls your

heating system.

Cgol OJ Hgat

C:ol 0/ H~at

28

Troubleshooting Guide

IF...

Display will not come on.

Temperature display will not go lower than 45° F r“ C] or higher than 88° F

[31

0

C] during programming.

Temperature change occurs at the wrong times.

Heating will not come on.

THEN...

Set the system switch to OFF. Remove batteries.

Insert batteries backward for at least five seconds to reset thermostat. Replace batteries correctly. Display should come on.

Make sure batteries are fresh and installed correctly.

Gently clean battery contacts using a soft pencil eraser. Do not use anything abrasive on clips.

You have reached the temperature setting limit.

The setting range is 45° F to 88°F [7°Cto310 C].

Check the program times for the period in question. Be sure that AM and PM indications are correct. Make sure the current day and time are correct. Reprogram if necessary.

Check that switch on thermostat is set to HEAT.

29

Heating will not come on (continued). 9

Check the system fuse or circuit breaker and replace or reset if necessary.

Check for correct wiring and good connections.

Jumper wires R and W. If heat does not come on, contact your heating dealer.

If display is blank or says “bAt Lo,” install fresh batteries.

If temperature setting is higher than current temperature, and SYSTEM ON indicator is lit, contact

Honeywell Customer Assistance at 1-800-468-1502.

Cooling will not come on.

:

Check that switch on thermostat is set to COOL.

Check the system fuse or circuit breaker and replace or reset if necessary.

Check for correct wiring and good connections.

Jumper wires Rc and Y. If cooling does not come on, contact your cooling dealer.

If display is blank or says “bAt Lo,” install fresh batteries.

The thermostat has a built-in time delay on cooling.

Allow five to ten minutes after changing the setting before the air conditioner starts.

30

The house is too warm or too cool.

SYSTEM ON indicator is lit, but no heat is coming from the registers.

Make sure outdoor disconnect is engaged (on).

If temperature setting is lower than current temperature, and SYSTEM ON indicator is lit, move system switch from COOL to OFF for ten minutes. After ten minutes, return switch to COOL position. If air conditioner comes on, compressor may have reached its high limit temperature protection and shut down. If air conditioner does not come on after the ten minutes and the SYSTEM ON indicator is lit, contact Honeywell Consumer Assistance at 1-800-468-1502.

If 2- or 4-wire installation, verify that R-Rc jumper is

installed.

Press RUN PROGRAM key to check the current temperature setting.

I

f desired, change the temperature setting. See

I

)age 14.

Wow time for the furnace to heat up and the fan to

:ome on before checking for heat at the register.

(

(

Check to make sure system on-time is set

:orrectly according to pages 16 and 17.)

31

The furnace cycles too frequently, or the system cycle length is too short or too long.

The thermostat current setting does not mstch the display temperature to within t 10.

Incorrect room temperature showing on thermostat display.

Readjust system on-time according to instructions on pages 16 and 17.

Check that the wiring hole in the wall behind the

wallplate has been plugged with insulation to prevent drafts that might adversely affect thermostat operation.

Be aware that it is normal for the current setting and display temperature to differ on occasion.

During recovery from setback or setup, setting and display temperatures may differ for up to 30 minutes after the recovery period.

Make sure hole behind thermostat is plugged with insulation to help prevent drafts from adversely affecting thermostat operation.

The thermostat is factory-calibrated, and cannot be adjusted.

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Toll-free Customer Assistance

For all questions concerning this thermostat, please read and follow the instructions. If additional assistance is needed, call Honeywell Customer Assistance toll-free at 1-800-468-

1502, Monday-Friday, 7:00 a.m. -5:30 p.m. Central time.

Before you call, please have the following information available: thermostat model number and date code, kind of heating/cooling system (i.e., hot water, warm air, oil, gas, etc.), and number of wires connected to the thermostat.

NOTICE

This equipment is a Class B digital apparatus, which complies with Canadian Radio Interference

Regulations, CRC c. 1374.

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