5 69-1532
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 Relations Center, toll-free, 1-800-468-1502.
Table 1. Compatibility Chart.
aCompatible with 2-wire Honeywell and Taco zone valves. Not compatible with 3-wire zone valves or 2-wire White
Rodgers no. 1361 zone valves.
bMillivolt system must be heat only.
cNot compatible with any 120/240 volt system.
Package Contents
• Thermostat • Wallplate • Screws and anchors
• Wiring labels • 3 Energizer® AA batteries • Owners manual
Tools Required
• Screwdriver
• Drill
System Type Compatibility with CT8602
Gas — Standing Pilot Yes
Gas — Electronic Ignition Yes
Gas-fired Boilers Yesa
Gas —750 Millivolt Heat onlybYes
Oil-Fired Boilers Ye sa
Oil-Fired Furnace Yes
Electric Furnace Yes
Electric Air Conditioning Yes
Baseboard Electric (120/240 line volt)cNo
Single Stage Heat Pump Yes
Multistage Heat Pumps/Multistage Equipment No