Owner's Manual
Page 1
... your old control in your home, keeping you with your new thermostat! Your new thermostat automatically controls the temperature in the trash. Direct questions about this thermostat to our Web site at www.honeywell.com/yourhome or call the customer information line at 1-800-468-1502.... ❑ Acquire tools and items, as needed. Registered Trademark Copyright © 2003 Honeywell • •All Rights Reserved 69-1620-1 If not, return it properly. CT3451 Programmable Thermostat OWNER'S GUIDE MERCURY NOTICE If this control is replacing a control that can provide you ...
... your old control in your home, keeping you with your new thermostat! Your new thermostat automatically controls the temperature in the trash. Direct questions about this thermostat to our Web site at www.honeywell.com/yourhome or call the customer information line at 1-800-468-1502.... ❑ Acquire tools and items, as needed. Registered Trademark Copyright © 2003 Honeywell • •All Rights Reserved 69-1620-1 If not, return it properly. CT3451 Programmable Thermostat OWNER'S GUIDE MERCURY NOTICE If this control is replacing a control that can provide you ...
Owner's Manual
Page 2
... applicable) are only two wires, they can damage equipment. CT3451 PROGRAMMABLE THERMOSTAT 2 REMOVE OLD THERMOSTAT ❑ Test to be sure your retailer. To avoid compressor damage, do not require labeling. The thermostat is below 50°F (10°C). Wrapping wires around ...OPENING Replacing Clock WIth C or C1 Clock Terminals If you are replacing a Honeywell Chronotherm® Thermostat, you want information about which programmable thermostats work with the new thermostat operation. Gas-standing pilot Gas-electronic ignition Gas-fired boilers System Type Gas...
... applicable) are only two wires, they can damage equipment. CT3451 PROGRAMMABLE THERMOSTAT 2 REMOVE OLD THERMOSTAT ❑ Test to be sure your retailer. To avoid compressor damage, do not require labeling. The thermostat is below 50°F (10°C). Wrapping wires around ...OPENING Replacing Clock WIth C or C1 Clock Terminals If you are replacing a Honeywell Chronotherm® Thermostat, you want information about which programmable thermostats work with the new thermostat operation. Gas-standing pilot Gas-electronic ignition Gas-fired boilers System Type Gas...
Owner's Manual
Page 3
3 MOUNT WALLPLATE IMPORTANT Level for typical system wiring diagrams. 3 69-1620-1 WALL 1 WALL ANCHORS (2) CT3451 PROGRAMMABLE THERMOSTAT TERMINAL SCREW FOR STRAIGHT INSERTION STRIP 5/16 IN. (8 MM) FOR WRAPAROUND STRIP 7/16 IN. (11 MM) G Rc R W B Y O M12559A MOUNTING SCREWS ... WIRE WALLPLATE TERMINALS All wiring must comply with the wall. ❑ Reposition the wallplate, pulling wires through 10 for appearance only. The CT3451 Thermostat is powered with 3AA alkaline batteries and is adaptable to most 18 to 30 Vac heatingcooling systems. Refer to Fig. 6 through the wiring...
3 MOUNT WALLPLATE IMPORTANT Level for typical system wiring diagrams. 3 69-1620-1 WALL 1 WALL ANCHORS (2) CT3451 PROGRAMMABLE THERMOSTAT TERMINAL SCREW FOR STRAIGHT INSERTION STRIP 5/16 IN. (8 MM) FOR WRAPAROUND STRIP 7/16 IN. (11 MM) G Rc R W B Y O M12559A MOUNTING SCREWS ... WIRE WALLPLATE TERMINALS All wiring must comply with the wall. ❑ Reposition the wallplate, pulling wires through 10 for appearance only. The CT3451 Thermostat is powered with 3AA alkaline batteries and is adaptable to most 18 to 30 Vac heatingcooling systems. Refer to Fig. 6 through the wiring...
Owner's Manual
Page 4
... 1 RELAY AND FAN COIL 24V 1 POWER SUPPLY. Typical heat-cool system hookup with 2-wire, heatonly system. CT3451 PROGRAMMABLE THERMOSTAT THERMOSTAT G Rc R 3 1 L1 (HOT) L2 W Y HEAT RELAY FAN RELAY COMPRESSOR CONTACTOR B O 2 COOL DAMPER 2 HEAT DAMPER TRANSFORMER 1 POWER SUPPLY. THERMOSTAT G Rc R W B Y O FAN COIL 1 L1 (HOT) L2 COOLIING CONTRACTOR COIL 24V 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND...
... 1 RELAY AND FAN COIL 24V 1 POWER SUPPLY. Typical heat-cool system hookup with 2-wire, heatonly system. CT3451 PROGRAMMABLE THERMOSTAT THERMOSTAT G Rc R 3 1 L1 (HOT) L2 W Y HEAT RELAY FAN RELAY COMPRESSOR CONTACTOR B O 2 COOL DAMPER 2 HEAT DAMPER TRANSFORMER 1 POWER SUPPLY. THERMOSTAT G Rc R W B Y O FAN COIL 1 L1 (HOT) L2 COOLIING CONTRACTOR COIL 24V 1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND...
Owner's Manual
Page 5
...shown in Fig. 11, is set the switch to the E (electric) position. NOTE: The thermostat shows a "bAtLo" message on the right side of the thermostat, by pulling outward from shutting down the thermostat and press the lower edge of battery power in the F (gas/oil fuel) position. Fig. ...❑ Remove the battery door, located on the digital display to alert the homeowner one to wallplate. M20512 CT3451 PROGRAMMABLE THERMOSTAT ❑ Swing down due to lack of the thermostat onto the wallplate to prevent leakage and/or the heating/cooling system from the bottom. See Fig. 12. ...
...shown in Fig. 11, is set the switch to the E (electric) position. NOTE: The thermostat shows a "bAtLo" message on the right side of the thermostat, by pulling outward from shutting down the thermostat and press the lower edge of battery power in the F (gas/oil fuel) position. Fig. ...❑ Remove the battery door, located on the digital display to alert the homeowner one to wallplate. M20512 CT3451 PROGRAMMABLE THERMOSTAT ❑ Swing down due to lack of the thermostat onto the wallplate to prevent leakage and/or the heating/cooling system from the bottom. See Fig. 12. ...
Owner's Manual
Page 6
... to the most commonly used settings: - Installing batteries. ❑ Restore power to the heating/cooling system. 8 CUSTOMIZE YOUR THERMOSTAT Your Honeywell thermostat comes preset to display heating and cooling algorithm default. C1 = Standard control algorithm. Temperature (°F). - NOTE: All four ...set the temperature setpoint to the °F/°C indication and the heat cycle rate. ❑ Enter Installer Setup. - CT3451 PROGRAMMABLE THERMOSTAT AA BATTERIES (3) PM TUE AuFtoANOn Hold Select CoolSOYfSf THEeMat - Press the ▼ key to change the heating and cooling ...
... to the most commonly used settings: - Installing batteries. ❑ Restore power to the heating/cooling system. 8 CUSTOMIZE YOUR THERMOSTAT Your Honeywell thermostat comes preset to display heating and cooling algorithm default. C1 = Standard control algorithm. Temperature (°F). - NOTE: All four ...set the temperature setpoint to the °F/°C indication and the heat cycle rate. ❑ Enter Installer Setup. - CT3451 PROGRAMMABLE THERMOSTAT AA BATTERIES (3) PM TUE AuFtoANOn Hold Select CoolSOYfSf THEeMat - Press the ▼ key to change the heating and cooling ...
Owner's Manual
Page 7
bRefer to the equipment manufacturer's instructions. 9 PROGRAM YOUR THERMOSTAT The thermostat is for your convenience with your heating Wake time. See energy saving charts at a comfortable temperature when you get up in the right side of ... 10:00 PM 62°F (17°C) 82°F (28°C) Wake is the time period you are away from home during the day. CT3451 PROGRAMMABLE THERMOSTAT NOTE: The heating and cooling program times are sleeping. Press ▼ or ▲ key to set current time. To set an energysaving temperature while you...
bRefer to the equipment manufacturer's instructions. 9 PROGRAM YOUR THERMOSTAT The thermostat is for your convenience with your heating Wake time. See energy saving charts at a comfortable temperature when you get up in the right side of ... 10:00 PM 62°F (17°C) 82°F (28°C) Wake is the time period you are away from home during the day. CT3451 PROGRAMMABLE THERMOSTAT NOTE: The heating and cooling program times are sleeping. Press ▼ or ▲ key to set current time. To set an energysaving temperature while you...
Owner's Manual
Page 8
... M12629B 4. Press ▼ or ▲ key to set Return time. Press ▼ or ▲ key to set Return temperature. M20562 b. SET M20559 2. Sleep a. Return a. CT3451 PROGRAMMABLE THERMOSTAT SET M12625C 2. Setting Saturday and Sunday Programs To set Leave temperature. Wake a. SET SET M18566 b. Return a. Press ▼ or ▲ key to set Leave time...
... M12629B 4. Press ▼ or ▲ key to set Return time. Press ▼ or ▲ key to set Return temperature. M20562 b. SET M20559 2. Sleep a. Return a. CT3451 PROGRAMMABLE THERMOSTAT SET M12625C 2. Setting Saturday and Sunday Programs To set Leave temperature. Wake a. SET SET M18566 b. Return a. Press ▼ or ▲ key to set Leave time...
Owner's Manual
Page 9
... SET 11 SET FAN AND SYSTEM SWITCHES Manually control Fan and System settings using the switches located at the bottom of the thermostat case. See. PM TUE Hold Select AuFtoANOn CoolSOYfSf THEeMat M20515 Fig. 14. Repeat programming steps to display present temperature setting....▼ or ▲ key once to set Sleep time. SET M20564 b. Press ▼ or ▲ key to set Sleep temperature. CT3451 PROGRAMMABLE THERMOSTAT Setting Indefinite Temperature Hold The Hold key allows you to the desired fan setting. 9 69-1620-1 SET M12641A M20565 5. Programming is set to...
... SET 11 SET FAN AND SYSTEM SWITCHES Manually control Fan and System settings using the switches located at the bottom of the thermostat case. See. PM TUE Hold Select AuFtoANOn CoolSOYfSf THEeMat M20515 Fig. 14. Repeat programming steps to display present temperature setting....▼ or ▲ key once to set Sleep time. SET M20564 b. Press ▼ or ▲ key to set Sleep temperature. CT3451 PROGRAMMABLE THERMOSTAT Setting Indefinite Temperature Hold The Hold key allows you to the desired fan setting. 9 69-1620-1 SET M12641A M20565 5. Programming is set to...
Owner's Manual
Page 10
... start the heating equipment. Cooling system should shut down . CT3451 PROGRAMMABLE THERMOSTAT System Switch ❑ The System switch settings control thermostat operation as follows: Cool: The thermostat controls the cooling system. Heat: The thermostat controls the heating system. ❑ Slide the System switch on...of five minutes to lower the temperature setting several degrees above the room temperature. Refer to remain off -timer assures that the thermostat has a built-in effect. indicates the minimum off . Press the ▼ key to protect the compressor. 3. The ...
... start the heating equipment. Cooling system should shut down . CT3451 PROGRAMMABLE THERMOSTAT System Switch ❑ The System switch settings control thermostat operation as follows: Cool: The thermostat controls the cooling system. Heat: The thermostat controls the heating system. ❑ Slide the System switch on...of five minutes to lower the temperature setting several degrees above the room temperature. Refer to remain off -timer assures that the thermostat has a built-in effect. indicates the minimum off . Press the ▼ key to protect the compressor. 3. The ...
Owner's Manual
Page 11
... Allow time for correct wiring and good connections. • If display is blank or says "bAtLo," install fresh batteries. • The thermostat has a built-in time delay on indicator ( = heat; = cool) is operating correctly. The batteries are fresh and installed correctly. ... • Plug the wiring hole in effect. Wait five minutes until Replace Battery indicator is complete. 11 69-1620-1 TROUBLESHOOTING CT3451 PROGRAMMABLE THERMOSTAT Table 4. Display does not come on indicator is flashing. • MInimum off -timer is illuminated and replace batteries. •...
... Allow time for correct wiring and good connections. • If display is blank or says "bAtLo," install fresh batteries. • The thermostat has a built-in time delay on indicator ( = heat; = cool) is operating correctly. The batteries are fresh and installed correctly. ... • Plug the wiring hole in effect. Wait five minutes until Replace Battery indicator is complete. 11 69-1620-1 TROUBLESHOOTING CT3451 PROGRAMMABLE THERMOSTAT Table 4. Display does not come on indicator is flashing. • MInimum off -timer is illuminated and replace batteries. •...
Owner's Manual
Page 12
...-3860 1885 Douglas Dr N Golden Valley, MN 55422 Canada: Honeywell Limited/Honeywell Limitée Product Services ON15 35 Dynamic Dr Scarborough, Ontario M1V 4Z9 This warranty does not cover removal or reinstallation costs. CT3451 PROGRAMMABLE THERMOSTAT PERCENT OF HEATING COSTS YOU CAN SAVE SAVINGS FOR ONCE-A-DAY 10... WARRANTY. If, at any questions concerning this limitation may have any time during the warranty period, the product is shown by Honeywell that the defect or malfunction was in U.S.A. If you may not apply to you purchased it, or (ii) package it carefully...
...-3860 1885 Douglas Dr N Golden Valley, MN 55422 Canada: Honeywell Limited/Honeywell Limitée Product Services ON15 35 Dynamic Dr Scarborough, Ontario M1V 4Z9 This warranty does not cover removal or reinstallation costs. CT3451 PROGRAMMABLE THERMOSTAT PERCENT OF HEATING COSTS YOU CAN SAVE SAVINGS FOR ONCE-A-DAY 10... WARRANTY. If, at any questions concerning this limitation may have any time during the warranty period, the product is shown by Honeywell that the defect or malfunction was in U.S.A. If you may not apply to you purchased it, or (ii) package it carefully...