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The furnace cycles too frequently,

■ 

Readjust system on-time according to instructions on

or the system cycle length

pages 16 and 17.

is too short or too long.

The thermostat current

■ 

Check that the wiring hole in the wall behind the

setting does not 

 the

wallplate has been plugged with insulation to

display temperature to within   10.

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.

Incorrect room temperature
showing on thermostat display.

■ 

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.

32

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, 

 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.

33

Summary of Contents for MagicStat CT2400

Page 1: ...ponsibility 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 consequent...

Page 2: ...ical location of a MERCURY SWITCH mercury switch in a thermostat w 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 5 Adjust Fan Operation Switch As Required 16 STEP 6 Adjust System On Time As Required 16 STEP 7 Mount Thermostat Mounting Plate 18 STEP 8 Wire Thermostat Terminals 2O STEP ...

Page 3: ...neywell Chronotherm 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 sepa rately using electrical tape Do not wrap them together Place the wires where they will not interfere with the operation of the new thermostat Record th...

Page 4: ...ges 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 7 Program The ...

Page 5: ...ogram 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 Personal Programming Chart HEATING PROGRAM A Weekdays Start Time Heating Temperature WAKE LEAVE RETURN SLEEP A...

Page 6: ...ctions on pages 6 and 7 Set Current Time Day T i m e o 0 Ahead To set time press and release kwma once n until current time shows to set day Back Time pressandreleasewagain V n until current day shows then press p lm Back Heating Program c 1 With system switch at HEAT press and release uk once WAKE Mon Fri and SET appear on display 12 Time Temp c 1 Ahead 0 Warmer Use to program WAKE time and n o t...

Page 7: ...heat system set the switch to E The FUEL SWITCH see illustration on page 17 is E setting will allow the fan to turn on immedi factory set in the F position This is the correct ately with the heating or cooling in a system setting for most systems If your system is an where the G terminal is connected _ Adjust System On Time As Required El The system on time is facto set for a warm air gas or oil h...

Page 8: ...Mount Thermostat Mounting Plate Position mounting plate on wall Use a level to make sure mounting plate is level Use a ORS pencil to mark the two mounting holes 2 b 18 l Remove mounting plate from wall and drill LEVEL 3 1 6 inch holes in wall if drywall as marked HI la El For firmer material such as plaster or wood II drill 7 32 inch holes Gently tap anchors provided into drilled holes until flush...

Page 9: ......

Page 10: ......

Page 11: ...hermostat Operation After Programming And Installing 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 1 Warmer Temp o Cooler Move the system switch to HEAT and the fan switch to AUTO Press key until the se...

Page 12: ...t 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 settingfor 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...

Page 13: ...resh batteries If temperature setting is higher than current tempera ture and SYSTEM ON indicator is lit contact Honeywell Customer Assistance at 1 800 468 1502 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 ...

Page 14: ...room temperature showing on thermostat display 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 32 Toll free Customer Assistance For all questions concerning this thermostat please read and follow the instructions If additional assistance is needed call Honeyw...

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