Owner's Manual
Page 1
Registered Trademark. Copyright © 2005 Honeywell International Inc. All rights reserved. Patents pending. 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.
Registered Trademark. Copyright © 2005 Honeywell International Inc. All rights reserved. Patents pending. 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.
Owner's Manual
Page 2
... are attached to terminals in your total. If the total (not counting C or C1) is 4 wires or less, proceed to check. Do you have 5 or more wires? If you purchase right thermostat? You may not be compatible with wires attached. Contact your system. If so, stop now. If any of the wall and attached...
... are attached to terminals in your total. If the total (not counting C or C1) is 4 wires or less, proceed to check. Do you have 5 or more wires? If you purchase right thermostat? You may not be compatible with wires attached. Contact your system. If so, stop now. If any of the wall and attached...
Owner's Manual
Page 3
... the letter on your old thermostat. (Adhesive labels are supplied in your thermostat package.) Remove the old wallplate only after all wires are labeled. 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 wall opening ! IGNORE WIRE COLORS: Use only letter designations...
... the letter on your old thermostat. (Adhesive labels are supplied in your thermostat package.) Remove the old wallplate only after all wires are labeled. 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 wall opening ! IGNORE WIRE COLORS: Use only letter designations...
Owner's Manual
Page 4
...; Y1 • M G•F Rc Connect to cover marks left by your system. See note If this wire is present, you cannot use this thermostat with wall. 3 [Optional] Pull wires through thermostat base and insert screws. Owner's Manual Mount thermostat base 1 Drill holes at pencil-marked locations (3/16" holes for drywall, 7/32" holes for plaster). 2 Use...
...; Y1 • M G•F Rc Connect to cover marks left by your system. See note If this wire is present, you cannot use this thermostat with wall. 3 [Optional] Pull wires through thermostat base and insert screws. Owner's Manual Mount thermostat base 1 Drill holes at pencil-marked locations (3/16" holes for drywall, 7/32" holes for plaster). 2 Use...