Step 1. Prepare For Installation - Honeywell CT3550 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 Relations Center, toll-free, 1-800-468-1502.
Gas — Standing Pilot
Gas — Electronic Ignition
Gas-fired Boilers
Gas — 750 Millivolt Heat
Oil-Fired Boilers
Oil-Fired Furnace
Electric Furnace
Electric Air Conditioning
Baseboard Electric (120/240 line volt)
Single Stage Heat Pump
Multistage Heat Pumps/Multistage Equipment
a
Compatible with 2-wire Honeywell and Taco zone valves. Not compatible with 3-wire zone valves or 2-wire White
Rodgers no. 1361 zone valves.
b
Not compatible with any 120/240 volt system.
Package Contents.
• Thermostat
• Screws and anchors
• 3 Energizer® AA batteries
Tools Required
• Screwdriver
• Drill
Table 1. Compatibility Chart.
System Type
b
5
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
No
• Wallplate
• Wiring labels
• Owners manual
Compatibility with CT3550
a
a
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