Owner's Manual
Page 1
All rights reserved. Registered Trademark. Owner's Manual CT31 Low-voltage Thermostat Getting started Check to make sure your package includes the following items: CT31 thermostat Cover plate Wire labels Caution card Wall anchors and mounting screws (2 each) Before you begin, make sure you have: • Screwdriver • Hammer • Level (optional) • Pencil • Drill bit (3/16" for drywall, 7/32" for plaster) ® U.S. Patents pending. Copyright © 2005 Honeywell International Inc.
All rights reserved. Registered Trademark. Owner's Manual CT31 Low-voltage Thermostat Getting started Check to make sure your package includes the following items: CT31 thermostat Cover plate Wire labels Caution card Wall anchors and mounting screws (2 each) Before you begin, make sure you have: • Screwdriver • Hammer • Level (optional) • Pencil • Drill bit (3/16" for drywall, 7/32" for plaster) ® U.S. Patents pending. Copyright © 2005 Honeywell International Inc.
Owner's Manual
Page 2
... to check. You may have 5 or more wires, your new thermostat may not be compatible with your old thermostat 1 Turn off power at heating/cooling system (or fuse/circuit-breaker panel). 2 Remove cover and thermostat, but leave wallplate with wires attached. If so, stop now. ...Did you have purchased the wrong replacement thermostat. 2 Stop installation and call 1-800-468-1502 for instructions regarding recycling and proper disposal. Do you purchase right thermostat? Leave wallplate in your old thermostat. If so, see mercury notice below. Count wires to the...
... to check. You may have 5 or more wires, your new thermostat may not be compatible with your old thermostat 1 Turn off power at heating/cooling system (or fuse/circuit-breaker panel). 2 Remove cover and thermostat, but leave wallplate with wires attached. If so, stop now. ...Did you have purchased the wrong replacement thermostat. 2 Stop installation and call 1-800-468-1502 for instructions regarding recycling and proper disposal. Do you purchase right thermostat? Leave wallplate in your old thermostat. If so, see mercury notice below. Count wires to the...
Owner's Manual
Page 3
Wrap supplied labels securely around 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. IGNORE WIRE COLORS: Use only letter designations to disconnect wires... one by one.As you disconnect each wire Do not let wires fall into wall opening . CT31 Low-voltage Thermostat Label wires and remove old wallplate Use a screwdriver to identify wire types. Be careful not to let loose wires fall into the...
Wrap supplied labels securely around 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. IGNORE WIRE COLORS: Use only letter designations to disconnect wires... one by one.As you disconnect each wire Do not let wires fall into wall opening . CT31 Low-voltage Thermostat Label wires and remove old wallplate Use a screwdriver to identify wire types. Be careful not to let loose wires fall into the...
Owner's Manual
Page 4
... plaster). 2 Use hammer to tap anchors into the wall opening. See page 2. 4 Optional cover plate Thermostat base Connect wires 1 Match each labeled wire with same letter on thermostat, see table below. If labels do not match letters on terminal. 2 Use a screwdriver to loosen screw...then tighten screws. 3 Push any excess wire back into holes until flush with your old thermostat). 4 Pull wires through thermostat base and insert screws. See note If this wire is present, you cannot use this thermostat with wall. 3 [Optional] Pull wires through cover plate (if needed to : Terminal...
... plaster). 2 Use hammer to tap anchors into the wall opening. See page 2. 4 Optional cover plate Thermostat base Connect wires 1 Match each labeled wire with same letter on thermostat, see table below. If labels do not match letters on terminal. 2 Use a screwdriver to loosen screw...then tighten screws. 3 Push any excess wire back into holes until flush with your old thermostat). 4 Pull wires through thermostat base and insert screws. See note If this wire is present, you cannot use this thermostat with wall. 3 [Optional] Pull wires through cover plate (if needed to : Terminal...
Owner's Manual
Page 5
CT31 Low-voltage Thermostat Set adjustment lever 1 Separate cover from thermostat, and remove the plastic insert. 2 Use a pencil to move the adjustment lever to the proper setting for your system (see table below). Your system Setting ... system 0.8 Gas/oil steam or gravity system 1.2 Finish installation Base (shown with optional cover plate) Thermostat Cover 5 1 Mount thermostat on base and tighten three mounting screws. 2 Align the 3 tabs on the cover with slots on the thermostat, then push gently until the cover snaps into place. 3 Restore electrical power at the heating/cooling...
CT31 Low-voltage Thermostat Set adjustment lever 1 Separate cover from thermostat, and remove the plastic insert. 2 Use a pencil to move the adjustment lever to the proper setting for your system (see table below). Your system Setting ... system 0.8 Gas/oil steam or gravity system 1.2 Finish installation Base (shown with optional cover plate) Thermostat Cover 5 1 Mount thermostat on base and tighten three mounting screws. 2 Align the 3 tabs on the cover with slots on the thermostat, then push gently until the cover snaps into place. 3 Restore electrical power at the heating/cooling...
Owner's Manual
Page 6
System switch • Cool: Thermostat controls only the cooling system. • Heat: Thermostat controls only the heating system. • Off: Heating and cooling systems are off. CAUTION: EQUIPMENT DAMAGE HAZARD. To prevent possible compressor damage, do not operate cooling system when outdoor temperature is on. Owner's Manual Operation Temperature setting Move lever to adjust desired indoor temperature. Fan switch • On: Fan runs continuously. • Auto: Fan runs only when heating or cooling system is below 50°F (10°C). 6
System switch • Cool: Thermostat controls only the cooling system. • Heat: Thermostat controls only the heating system. • Off: Heating and cooling systems are off. CAUTION: EQUIPMENT DAMAGE HAZARD. To prevent possible compressor damage, do not operate cooling system when outdoor temperature is on. Owner's Manual Operation Temperature setting Move lever to adjust desired indoor temperature. Fan switch • On: Fan runs continuously. • Auto: Fan runs only when heating or cooling system is below 50°F (10°C). 6
Owner's Manual
Page 7
..., INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITED TO THE ONE-YEAR DURATION OF THIS WARRANTY. If you . CT31 Low-voltage Thermostat Limited Warranty Honeywell warrants this product to be free from defects in the possession of a consumer. Some states do not allow limitations on how long an...
..., INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, IS HEREBY LIMITED TO THE ONE-YEAR DURATION OF THIS WARRANTY. If you . CT31 Low-voltage Thermostat Limited Warranty Honeywell warrants this product to be free from defects in the possession of a consumer. Some states do not allow limitations on how long an...