Owner's Manual
Page 1
... outbuildings. select models; Old thermostat Cover M23786 ® U.S. Owner's Manual English: Page 1 Mode d'emploi Français : Page 6 Manual de Uso Español: Página 11 M23785 CT50 Series Thermostat Vertical Mount: CT50 (24 Vac heating systems) CT51 (24 Vac heating and cooling systems) CT53 (750 mV or 12Vdc heating systems) Horizontal Mount: CT54 (24 Vac heating systems) CT55 (24 Vac heating and cooling systems) Temperature Control Range • 45...
... outbuildings. select models; Old thermostat Cover M23786 ® U.S. Owner's Manual English: Page 1 Mode d'emploi Français : Page 6 Manual de Uso Español: Página 11 M23785 CT50 Series Thermostat Vertical Mount: CT50 (24 Vac heating systems) CT51 (24 Vac heating and cooling systems) CT53 (750 mV or 12Vdc heating systems) Horizontal Mount: CT54 (24 Vac heating systems) CT55 (24 Vac heating and cooling systems) Temperature Control Range • 45...
Owner's Manual
Page 2
... CT51/CT55: If your old thermostat has 7 or more wires (not counting terminals C or C1), you may have purchased the wrong replacement thermostat. Stop now and call 1-800-468-1502 for advice. Be careful not to let loose wires fall into the wall opening ! CT51/CT55 1. CT50 Series • Owner's Manual Label wires and remove old wallplate Use a screwdriver to identify wire types. Stop now and...
... CT51/CT55: If your old thermostat has 7 or more wires (not counting terminals C or C1), you may have purchased the wrong replacement thermostat. Stop now and call 1-800-468-1502 for advice. Be careful not to let loose wires fall into the wall opening ! CT51/CT55 1. CT50 Series • Owner's Manual Label wires and remove old wallplate Use a screwdriver to identify wire types. Stop now and...
Owner's Manual
Page 3
... wires Connect to W terminal. Match each labeled wire with wall. 3. Wrap B wire with electrical tape. 3 69-2040EFS-01 CT51/CT55 Wiring CT51/CT55 M23792 [1] If wires will be connected to loosen screw terminals, insert bare wires beneath screws, then tighten screws. 3. Check level if desired, then tighten screws. Use a screwdriver to both R and Rc terminals, remove the metal jumper. [2] Do not connect both O and B if you have a heat pump...
... wires Connect to W terminal. Match each labeled wire with wall. 3. Wrap B wire with electrical tape. 3 69-2040EFS-01 CT51/CT55 Wiring CT51/CT55 M23792 [1] If wires will be connected to loosen screw terminals, insert bare wires beneath screws, then tighten screws. 3. Check level if desired, then tighten screws. Use a screwdriver to both R and Rc terminals, remove the metal jumper. [2] Do not connect both O and B if you have a heat pump...
Owner's Manual
Page 4
Your system Steam Hot water heat Warm air (high efficiency) Warm air (standard) Electric heat Setting 1.2 0.8 0.8 0.4 0.3 Finish installation 1. CT50 Series • Owner's Manual Set fan operation switch (CT51/CT55) Move the switch to the proper setting for your system: F: For gas or oil heating systems, leave the fan operation switch in this setting for heat pump or electric heat systems. (This setting is connected to the G terminal.) Set heat anticipator (select models) Move the adjustment arrow to the proper setting for heat). Tab 69-2040EFS-01 4 M23...
Your system Steam Hot water heat Warm air (high efficiency) Warm air (standard) Electric heat Setting 1.2 0.8 0.8 0.4 0.3 Finish installation 1. CT50 Series • Owner's Manual Set fan operation switch (CT51/CT55) Move the switch to the proper setting for your system: F: For gas or oil heating systems, leave the fan operation switch in this setting for heat pump or electric heat systems. (This setting is connected to the G terminal.) Set heat anticipator (select models) Move the adjustment arrow to the proper setting for heat). Tab 69-2040EFS-01 4 M23...
Owner's Manual
Page 5
... should be returned to set desired indoor temperature. English: Page 1 • Français : Page 6 • Español: Página 11 Operation Fan switch (CT51/CT55) • Auto: Fan runs only when heating or cooling system is on how long an implied warranty lasts, so the above . THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. System switch (select models) • Heat: Controls the heating system. •...
... should be returned to set desired indoor temperature. English: Page 1 • Français : Page 6 • Español: Página 11 Operation Fan switch (CT51/CT55) • Auto: Fan runs only when heating or cooling system is on how long an implied warranty lasts, so the above . THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. System switch (select models) • Heat: Controls the heating system. •...
Owner's Manual
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...;n al cliente de Honeywell 1-800-468-1502 Automation and Control Solutions Honeywell International Inc. Rev. 08-09 Registered Trademark. © 2009 Honeywell International Inc. 69-2040EFS-01 M.S. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Toronto, Ontario M1V 4Z9 http://DIYthermostats.honeywell.com Printed in U.S.A. CT50 Series • Owner's Manual Need Help? For assistance...
...;n al cliente de Honeywell 1-800-468-1502 Automation and Control Solutions Honeywell International Inc. Rev. 08-09 Registered Trademark. © 2009 Honeywell International Inc. 69-2040EFS-01 M.S. Honeywell Limited-Honeywell Limitée 1985 Douglas Drive North 35 Dynamic Drive Golden Valley, MN 55422 Toronto, Ontario M1V 4Z9 http://DIYthermostats.honeywell.com Printed in U.S.A. CT50 Series • Owner's Manual Need Help? For assistance...