Honeywell CT2400 User Manual

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

PROGRAMMING AND INSTALLATION INSTRUCTIONS

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

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,

ffuncf ion, and mail it, postage prepaid, to the following address

Honaywall Inc.

Return Goods Department 1050 Plymouth, MN 55441-4437 Scarborough, Ontario Ml P 2V9

This warranty does not cover removal or reinstallation coats. This warranty shall not malfunction was caused by damage

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

THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE DURATION OF ANY IMPLIED wARRANTIES, INCLUDING THE WARRANTIES OF LIMITED TO THE ONE YEAR DURATION OF THIS WARRANTY. Some states do not allow so the above limitation may not apply to you.

This warranty

you have any questions concerning this warranty, please write our Customer Assistance Center, Honeywell Inc., MN 55440-0524 or call 1-800-468-1502, Monday-Friday, Honeywell

givas you specific legal rights, and You may have other

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

af0n9 wdh Proof of purchase (including date of purchaae) and a short description of the

13erkafdre

Lane

which occurred while the product was in the possession of a consumer.

Honeywel~s option) within a reasonable period of time.

in Canada: Honeywell Limited/Honeywell

MERCHANTABILIV AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY

7:00 a.m. to 5:30 p.m., Central time. In Canada, write Retail Products ON1 5-02H,

Product Services ON 15-FFE

Ellesmere Road

74o

apply if It is shown by Honeywell that the defect or

or consequential damages, so this limitation may not apply to you.

r!ghts

which vary from state to state.

Limit6e

Ilmitafions on how long an implied warranty lasts,

P.O.

Box 524, Minneapolis,

CT2400

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

❑

SaviW

l&F [5*C] d— 2 3

so%

~za%

Thermostat patents pending.

for

Gnc3-A.Oay

❑

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

Printed in U.S.A.

“~~

m lwF

grfes WP+vxlmateiy

[50CI dncrease+~F

G.S.

pemml

7-93

[*C]

deciease

these

savings.)

@Honeywell

~z,,~h

Inc.

1993

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

MagicStat@

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 time.

programmable thermostat.

7:00

a.m.-53O p.m., Central

Table Of Contents

@ RECYCLING THERMOSTAT

If this thermostat is replacing a thermostat that contains mercury in a sealed tube (see illustration below), do thermostat in the trash. Contact your 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.

not

place your old

—.

Jocal

waste

MERCURY SWITCH

M3701

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

STEP 2 Remove Old Thermostat STEP 3 Install The Batteries STEP 4 Program The Thermostat

STEP 5 Adjust Fan Operation Switch, As Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

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

STEP 8 Wire Thermostat Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4 6

16 16 18

..2O

—

❑

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

“(~,

WIRE CUTTEWSTRIPPER OR SHARP KNIFE, IF NEEDED, TO STRIP WIRES

UIall

LEVEL, IF NEEDED, TO LEVEL THERMOSTAT FOR APPEARANCE

~AsKING

TAPE

NEEDED, TO AS DISCONNECTED FROM OLD THERMOSTAT

Ll&EL

WIRES

ulEa-’-U

M378B

❑

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.

.,-. -- ——-., I-,-

lNoI

~Compatible

stats for zone valves. Not compatible with 2-wire White-Rodgers no. 1361 valves.

~Compatible

gravity systems.

Prepare For Installation

TABLE 1 -COMPATIBILITY CHART.

Gas-Standin~ Pilot

Gas-Electro~c

Gas-Fired Boilers

Gas—Millivolt

Oil-Fired Boilers

OWired Furnace

Electric Furnace Electric Air Conditioning

Baseboard Electric (120/240 Line Volt) Heat

compaurm

System Type

Ignition

PumpdMultistage

with 2-wire Honeywell zone valves. Isolating relay required

with

Equipment

. . .

..L

---- .fin/n”n

WIIrI arly

hot

water baseboard systems. Will not work efficiently on steam or

.._i. -:.-..:.

al~+u VUIL cxrum.

Compatible With CT2400

Yes

Y:AA

Yes Yes Yes

No No

for3-wire

thermo-

[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.

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

bottom, check for a screw used to lock on the

cover.

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

If you are replacing a Honeywell

Chronotherm@

or two wires that go to the C or Cl clock terminals on the Chronotherm Thermostat wiring 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

Remove Old Thermostat

when pulled firmly from the

Thermostat, you may find one

wallplate.

Do not allow them to touch,

❑

Loosen screws holding thermostat to subbase,

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 new thermostat. Keep the wires from falling back into the wall by wrapping them around a pencil as shown.

or multistage system. The thermostat is

not

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? 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 1-800468-1502.

wallplate

compatible with such systems so return

If you have three wires for heating only and

or wall, and lift away.

ako

not be connecting it to your

——. .

—

IMPORTANT: Batteries must be installed for

programming and operation of the thermo-

stat and heating/cooling system.

❑

Purchase two AA alkaline batteries; alkaline 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.

Use a coin to remove battery door.

❑

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

Replace battery door.

Install The Batteries

non-

—

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

M1779B

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

E=l

M171

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

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,” “ TURN,” and “SLEEP.” These periods can

be seen individually on the display as you

press the SET SCHEDULE key.

Program The Thermostat

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

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.

‘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

system from shutting down

sleeping. (Again, lower heat or higher cool.

For more comfortable sleeping, some people choose not to raise the cool temperature during the night.)

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

Personal Programming Chart

HEATING PROGRAM

Weekdays WAKE

LEAVE RETURN

SLEEP Weekends

WAKE SLEEP

Start Time

require it. For example, a house that is occupied during weekdays would only require programs for “WAKE and “SLEEP.”

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.

Heating Temperature

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

will copy to the weekend schedule.

The

temperatures

45° F

[7:

C].

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°

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.

cannot be set any higher than

COOLING PROGRAM

Start Time

88° F [31° C] or any lower than

.—

Cooling

Temperature~

—

C].

+ 9 hidden pages