Honeywell CT3355A1003 Owner's Manual - Page 4

Step 1: Prepare for Installation s Check Table 1 to make sure this thermostat is compatible with your system. If not, return to the retailer. For more information, call Honeywell Customer Assistance, toll-free 1-800-468-1502. Table 1. Compatibility Chart. System Type Compatible With CT3355 Gas-Standing Pilot Yes Gas-Electronic Ignition Gas-Fired Boilers Yes Yes a, b Gas-Millivolt Oil-Fired Boilers No Yes a, b Oil-Fired Furnace Yes Electric Furnace Yes Electric Air Conditioning Yes Baseboard Electric (120/240 Line Volt) No Heat Pumps/Multistage Equipment No Not compatible with any 120/240 volt circuit. a Compatible with 2-wire Honeywell Zone Valves. Isolating relay required for 3-wire thermostats for zone valves. Not compatible with 2-wire White-Rodgers no. 1361 Valves. b Compatible with hot water baseboard systems. Will not work efficiently on steam or gravity systems. 4 69-1012