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)
Temperature Control Range
Horizontal Mount:
CT54 (24 Vac heating systems)
CT55 (24 Vac heating and cooling systems)
•45°–95°F (7°–35°C)
•35°–85°F (2°–29°C); select models; for garages or other outbuildings.
Getting started
Check package contents: |
Before you begin, make sure you have: |
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• |
Thermostat |
• No. 2 Phillips & small pocket screwdrivers |
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• Wall anchors & screws (2 each) |
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Hammer |
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Wire labels |
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Level (optional) |
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• |
Pencil |
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• Drill and bit (3/16” for drywall, 7/32” for |
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plaster) |
Remove your old thermostat
TURN OFF POWER at heating/cooling system (or fuse/circuit-breaker panel). Remove cover and thermostat, but leave wallplate with wires attached.
Leave wallplate in place.
Old thermostat |
Cover |
M23786 |
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® U.S. Registered Trademark. Patents pending. Copyright © 2009 Honeywell International Inc.
All rights reserved.
Is there a sealed tube containing mercury? If so, see mercury notice below.
MERCURY NOTICE
If your old thermostat contains mercury, contact your local waste management authority for proper disposal instructions.
69-2040EFS-01
CT50 Series • Owner's Manual
Label wires and remove old wallplate
Use a screwdriver to disconnect wires one by one. As you disconnect each wire, wrap it with the label matching the letter on your old thermostat. (Adhesive labels are supplied in your thermostat package.)
Remove the old wallplate only after all wires are labeled. Be careful not to let loose wires fall into the wall opening.
Wrap supplied labels securely around each wire. Do not let wires fall into wall opening!
CT50/CT53/CT54 |
CT51/CT55 |
M23787 |
M23788 |
IGNORE WIRE COLORS: Use only letter designations to identify wire types.
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.
Stop now and call 1-800-468-1502 for advice.
For 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.
Mark mounting position |
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CT50/CT53/CT54 |
CT51/CT55 |
1. |
Pull wires |
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through base. |
2. |
Level base if |
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desired. |
3. |
Mark positions |
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of both screw |
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holes. |
M23789 |
M23790 |
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English: Page 1 • Français : Page 6 • Español: Página 11
Mount thermostat base
1. Drill holes at pencil-marked 
locations (3/16” holes for 
drywall, 7/32” holes for
plaster).
2. Use hammer to tap anchors into holes until flush with wall.
3.Pull wires through thermostat base and insert screws.
Check level if desired, then |
M23791 |
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tighten screws.
Connect wires
1.Match each labeled wire with same letter on terminal.
2.Use a screwdriver to loosen screw terminals, insert bare wires beneath screws, then tighten screws.
3.Push any excess wire back into the wall opening.
Labels don't match?
If labels do not match letters on thermostat, see table below.
Existing wires |
Connect to: |
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R • RH • 4 • V |
Terminal “R” |
[1] |
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Rc |
Terminal “Rc” |
[1] |
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O |
Terminal “O” |
[2] |
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B |
Terminal “B” |
[2] |
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G • F |
Terminal “G” |
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W • W1 • H |
Terminal “W” |
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Y • Y1 • M |
Terminal “Y” |
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C • X • B |
Do not use |
[3] |
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CT50/CT53/CT54
Wiring CT50/CT53/CT54
•2-wire heat-only system: Connect one wire to R terminal, one wire to W terminal.
CT51/CT55
Wiring CT51/CT55
[1]If wires will be connected to both R and Rc terminals, remove the metal jumper.
[2]Do not connect both O and B if you have a
heat pump. Connect only the O wire. Wrap B wire with electrical tape and do not use.
[3]Do not use C, X or B. Wrap bare end of wire with electrical tape.
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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 factory-set position (for systems that control the fan in a call for heat).
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 to the proper setting for your system (see table below).
Your system |
Setting |
Steam |
1.2 |
Hot water heat |
0.8 |
Warm air (high efficiency) |
0.8 |
Warm air (standard) |
0.4 |
Electric heat |
0.3 |
Finish installation
1.Align the slots on the cover with tabs on the sides of the base, then push gently until the cover snaps into place.
2.Restore power at the heating/cooling system, or at the fuse/circuit-breaker panel.
Tab
M23796
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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.
•On: Fan runs continuously.
System switch (select models)
•Heat: Controls the heating system.
•Off: All systems are off.
•Cool: Controls the cooling system (CT51/ CT55).
M23785
Temperature setting
Adjust to set desired indoor temperature.
CAUTION: EQUIPMENT DAMAGE HAZARD (CT51/CT55).
Do not operate cooling system when outdoor temperature is below 50°F (10°C).
1-year limited warranty
Honeywell warrants this product to be free from defects in the workmanship or materials, under normal use and service, for a period of one (1) year from the date of purchase by the consumer. If at any time during the warranty period the product is determined to be defective or malfunctions, Honeywell shall repair or replace it (at Honeywell's option).
If the product is defective,
(i)return it, with a bill of sale or other dated proof of purchase, to the place from which you purchased it; or
(ii)call Honeywell Customer Care at 1-800-468-1502.
Customer Care will make the determination whether the product should be returned to the following address:
Honeywell Return Goods, Dock 4 MN10-3860, 1885 Douglas Dr. N., Golden Valley, MN 55422, or whether a replacement product can be sent to you.
This warranty does not cover removal or reinstallation costs. This warranty shall not apply if it is shown by Honeywell that the defect or malfunction was caused by damage which occurred while the product was in the possession of a consumer.
Honeywell's sole responsibility 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 consequential damages, so this limitation may not apply to you.
THIS WARRANTY IS THE ONLY EXPRESS WARRANTY HONEYWELL MAKES ON THIS PRODUCT. THE DURATION OF ANY IMPLIED WARRANTIES, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITED TO THE ONEYEAR DURATION OF THIS WARRANTY. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.
This warranty gives you specific legal rights, and you may have other rights which vary from state to state.
If you have warranty questions, please write Honeywell
Customer Relations, 1985 Douglas Dr., Golden Valley, MN 55422 or call 1-800-468-1502. In Canada, write Retail Products ON15-02H, Honeywell Limited/Honeywell Limitée,
35 Dynamic Drive, Toronto, Ontario M1V4Z9.
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69-2040EFS—01 |
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