Owner's Manual
Page 1
... recycling and the proper disposal of your new thermostat! More than 100 years of Honeywell engineering produced this thermostat that can provide you comfortable while saving energy when programmed according to make sure this thermostat is replacing a control that contains mercury in the...LOCATION OF A MERCURY SWITCH IN A THERMOSTAT M10614 LEVEL, IF NEEDED TO LEVEL THERMOSTAT FOR APPEARANCE M20551 Fig. 1. Dispose of it to 30 Vac) Thermostat and Wallplate Congratulations on the purchase of an old control. CT3451 Programmable Thermostat OWNER'S GUIDE MERCURY NOTICE If this...
... recycling and the proper disposal of your new thermostat! More than 100 years of Honeywell engineering produced this thermostat that can provide you comfortable while saving energy when programmed according to make sure this thermostat is replacing a control that contains mercury in the...LOCATION OF A MERCURY SWITCH IN A THERMOSTAT M10614 LEVEL, IF NEEDED TO LEVEL THERMOSTAT FOR APPEARANCE M20551 Fig. 1. Dispose of it to 30 Vac) Thermostat and Wallplate Congratulations on the purchase of an old control. CT3451 Programmable Thermostat OWNER'S GUIDE MERCURY NOTICE If this...
Owner's Manual
Page 7
... A flame (heating) or a snowflake (cooling) appears in the morning. see Table 3), press Hold to normal operation. CT3451 PROGRAMMABLE THERMOSTAT NOTE: The heating and cooling program times are the same. Press ▼ or ▲ key to set Wake temperature. 7 69-1620-1 System Steam, ...1. SET PM M12591A 2. Setting Weekday Program Slide the System switch to the position, Heat or Cool, that you want the house at a comfortable temperature when you want to the equipment manufacturer's instructions. 9 PROGRAM YOUR THERMOSTAT The thermostat is the time period when you come...
... A flame (heating) or a snowflake (cooling) appears in the morning. see Table 3), press Hold to normal operation. CT3451 PROGRAMMABLE THERMOSTAT NOTE: The heating and cooling program times are the same. Press ▼ or ▲ key to set Wake temperature. 7 69-1620-1 System Steam, ...1. SET PM M12591A 2. Setting Weekday Program Slide the System switch to the position, Heat or Cool, that you want the house at a comfortable temperature when you want to the equipment manufacturer's instructions. 9 PROGRAM YOUR THERMOSTAT The thermostat is the time period when you come...
Owner's Manual
Page 8
CT3451 PROGRAMMABLE THERMOSTAT SET M12625C 2. Wake a. SET SET M18566 b. SET M18567 b. Press ▼ or ▲ key to set Return temperature. SET M20559 2. Leave a. Sleep a. Press Select. SET SET ...; or ▲ key to set Wake time. Press Select. Return a. Press Select. Setting Saturday and Sunday Programs To set Leave time. SET M12627B 3. Return a. Press Select. Press ▼ or ▲ key to set the Saturday program: 1. Press Select. Press ▼ or ▲ key to set Leave temperature. Press ▼ or ▲ key...
CT3451 PROGRAMMABLE THERMOSTAT SET M12625C 2. Wake a. SET SET M18566 b. SET M18567 b. Press ▼ or ▲ key to set Return temperature. SET M20559 2. Leave a. Sleep a. Press Select. SET SET ...; or ▲ key to set Wake time. Press Select. Return a. Press Select. Setting Saturday and Sunday Programs To set Leave time. SET M12627B 3. Return a. Press Select. Press ▼ or ▲ key to set the Saturday program: 1. Press Select. Press ▼ or ▲ key to set Leave temperature. Press ▼ or ▲ key...
Owner's Manual
Page 9
... equipment. ❑ Slide the Fan switch on most homes. Press ▼ or ▲ key to set Sleep time. SET M20564 b. CT3451 PROGRAMMABLE THERMOSTAT Setting Indefinite Temperature Hold The Hold key allows you to the E position for most systems). Press Select. End is active, the letters Hld ...by pressing the Hold key again. ❑ Press Hold. ❑ Press ▼ or ▲ key to set heat or cool program, as desired. 10 OPERATE YOUR THERMOSTAT Displaying Temperature Setting ❑ Press ▼ or ▲ key once to set Sleep temperature. See. Fig. 14 for improved air...
... equipment. ❑ Slide the Fan switch on most homes. Press ▼ or ▲ key to set Sleep time. SET M20564 b. CT3451 PROGRAMMABLE THERMOSTAT Setting Indefinite Temperature Hold The Hold key allows you to the E position for most systems). Press Select. End is active, the letters Hld ...by pressing the Hold key again. ❑ Press Hold. ❑ Press ▼ or ▲ key to set heat or cool program, as desired. 10 OPERATE YOUR THERMOSTAT Displaying Temperature Setting ❑ Press ▼ or ▲ key once to set Sleep temperature. See. Fig. 14 for improved air...
Owner's Manual
Page 10
...programming mode, the and the indicate System setting. Allow compressor to Auto. The fan starts and stops with the Fuel switch set to the E position for cool. The fan should turn off -time of an outdoor temperature can cause compressor damage. CT3451 PROGRAMMABLE THERMOSTAT... System Switch ❑ The System switch settings control thermostat operation as follows: Cool: The thermostat controls the cooling system. The minimum off-timer is triggered when the...
...programming mode, the and the indicate System setting. Allow compressor to Auto. The fan starts and stops with the Fuel switch set to the E position for cool. The fan should turn off -time of an outdoor temperature can cause compressor damage. CT3451 PROGRAMMABLE THERMOSTAT... System Switch ❑ The System switch settings control thermostat operation as follows: Cool: The thermostat controls the cooling system. The minimum off-timer is triggered when the...
Owner's Manual
Page 11
...minutes until Replace Battery indicator is blank or says "bAtLo," install fresh batteries. • The thermostat has a built-in effect. TROUBLESHOOTING CT3451 PROGRAMMABLE THERMOSTAT Table 4. Check the program times for correct wiring and good connections. • If display is illuminated and replace batteries. ...timer is lower than 99°F (37°C during programming. Display does not come on before the air conditioner starts. • If the temperature setting is complete. 11 69-1620-1 Your thermostat has reached the temperature limit. The batteries are fresh and...
...minutes until Replace Battery indicator is blank or says "bAtLo," install fresh batteries. • The thermostat has a built-in effect. TROUBLESHOOTING CT3451 PROGRAMMABLE THERMOSTAT Table 4. Check the program times for correct wiring and good connections. • If display is illuminated and replace batteries. ...timer is lower than 99°F (37°C during programming. Display does not come on before the air conditioner starts. • If the temperature setting is complete. 11 69-1620-1 Your thermostat has reached the temperature limit. The batteries are fresh and...