Step 1. Prepare For Installation; Step 2. Remove Old Thermostat - Honeywell CT3611 Owner's Manual

STEP 1. PREPARE FOR INSTALLATION

q This thermostat is designed to work with multistage heat pumps (heat pumps with Auxiliary and/or Emergency
Heat). Check Table 1 in Step 4 to make sure the CT3611 is compatible with your system. If you have
compatibility questions, contact Honeywell at www.honeywell.com/yourhome or call the Customer Relations
Center at 1-800-468-1502.
Package Contents
• Thermostat
• Screws and anchors
• Wallplate
Tools Required
• Screwdriver
• Drill

STEP 2. REMOVE OLD THERMOSTAT

q Test your heating and cooling systems to make sure they work properly. If either system does not work, contact
your local heating/air-conditioning dealer. To avoid compressor damage, do not operate the cooling system when
outdoor temperature is below 50°F (10°C).
q Turn off power to the system at the furnace or the fuse/circuit breaker panel.
q Carefully unpack your new thermostat and wallplate. Save package of screws, instructions, and receipt.
q Remove the cover from the old thermostat. If the cover does not snap off when pulled firmly from the bottom, check
for a screw or screws used to lock on the cover.
q Loosen the screw or screws holding the thermostat to the wallplate and lift the thermostat away.
q Disconnect the wires from the old thermostat. As you disconnect each wire, attach
the enclosed labels with the old terminal designation. Wrap the wires around a
pencil as shown to keep them from falling back into the wall.
• Wiring labels
• Owners manual
5
WIRES THROUGH
WALL OPENING
M5136
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