Step 1. Prepare For Installation - Honeywell THE DIGITAL ROUND CT8775A Owner's Manual

STEP 1. PREPARE FOR INSTALLATION

Check Table 1, the compatibility chart, to make sure the thermostat is compatible with your system. If your system
is not compatible, call Honeywell Customer Care, toll-free, 1-800-468-1502.
Gas or Oil Warm Air
Electric Warm Air
Gas or Oil Hot Water
Gas or Oil Steam
Gas or Oil Gravity
Gas Millivolt
Electric Air Conditioning
Baseboard Electric (120/240 line volt)
Single Stage Heat Pump
Multistage Heat Pumps/Multistage Equipment
a
Compatible with 2-wire Honeywell zone valves. Not compatible with Taco zone valves and 2- or 3-wire White-
Rodgers zone valves (No. 1311 and 1361).
b
Not compatible with any 120/240 volt system.
Package Contents
• Thermostat
• Wiring labels
Tools for Installation
• Screwdriver
• Needle nose pliers
Table 1. Compatibility Chart.
System Type
b
• Decorator cover plate
• Owner's Guide
• Drill
• Drill bits (3/16 in. drywall,
7/32 in. plaster)
Compatibility with
CT8775A
Yes
No
a
Yes
Yes
Yes
No
No
No
No
No
3
Compatibility with
CT8775C
Yes
Yes
a
Yes
Yes
Yes
No
Yes
No
Yes
No
• Screws and wall anchors
• Hammer
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