Owner's Manual
Page 1
... heating/cooling system (or fuse/circuit-breaker panel). Patents pending. Copyright © 2009 Honeywell International Inc. select models; Registered Trademark. MERCURY NOTICE If your old thermostat contains mercury, contact your old thermostat Before you begin, make sure you have: • No. 2 Phillips & small ...: 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) ...
... heating/cooling system (or fuse/circuit-breaker panel). Patents pending. Copyright © 2009 Honeywell International Inc. select models; Registered Trademark. MERCURY NOTICE If your old thermostat contains mercury, contact your old thermostat Before you begin, make sure you have: • No. 2 Phillips & small ...: 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) ...
Owner's Manual
Page 2
... and call 1-800-468-1502 for advice. CT51/CT55 1. For CT50/CT53/CT54: If your old thermostat has 3 or more wires (not counting terminals C or C1), you may have purchased the wrong replacement thermostat. CT50/CT53/CT54 CT51/CT55 M23787 M23788 IGNORE WIRE COLORS: Use only letter designations to... disconnect wires one by one. Mark mounting position CT50/CT53/CT54 For CT51/CT55: If your thermostat package.) Remove the old wallplate only after all wires are supplied in your old thermostat has 7 or more wires (not counting terminals C or C1), you may...
... and call 1-800-468-1502 for advice. CT51/CT55 1. For CT50/CT53/CT54: If your old thermostat has 3 or more wires (not counting terminals C or C1), you may have purchased the wrong replacement thermostat. CT50/CT53/CT54 CT51/CT55 M23787 M23788 IGNORE WIRE COLORS: Use only letter designations to... disconnect wires one by one. Mark mounting position CT50/CT53/CT54 For CT51/CT55: If your thermostat package.) Remove the old wallplate only after all wires are supplied in your old thermostat has 7 or more wires (not counting terminals C or C1), you may...
Owner's Manual
Page 3
...wires 1. Match each labeled wire with electrical tape and do not match letters on terminal. 2. If labels do not use. [3] Do not use [3] CT50/CT53/CT54 Wiring CT50/CT53/CT54 • 2-wire heat-only system: Connect one wire to R terminal, one wire to : R • RH • 4 • V... at pencil-marked locations (3/16" holes for drywall, 7/32" holes for plaster). 2. Wrap B wire with same letter on thermostat, see table below. Pull wires through thermostat base and insert screws. Use a screwdriver to both R and Rc terminals, remove the metal jumper. [2] Do not connect both...
...wires 1. Match each labeled wire with electrical tape and do not match letters on terminal. 2. If labels do not use. [3] Do not use [3] CT50/CT53/CT54 Wiring CT50/CT53/CT54 • 2-wire heat-only system: Connect one wire to R terminal, one wire to : R • RH • 4 • V... at pencil-marked locations (3/16" holes for drywall, 7/32" holes for plaster). 2. Wrap B wire with same letter on thermostat, see table below. Pull wires through thermostat base and insert screws. Use a screwdriver to both R and Rc terminals, remove the metal jumper. [2] Do not connect both...
Owner's Manual
Page 4
... fuse/circuit-breaker panel. E: Change the switch to this setting for heat pump or electric heat systems. (This setting is for systems that allow the thermostat to control the fan in a call for heat, if a fan wire is connected to the G terminal.) Set heat anticipator (select models) Move the adjustment arrow...
... fuse/circuit-breaker panel. E: Change the switch to this setting for heat pump or electric heat systems. (This setting is for systems that allow the thermostat to control the fan in a call for heat, if a fan wire is connected to the G terminal.) Set heat anticipator (select models) Move the adjustment arrow...