Advanced “self-configuring” circuitry allows the T156
electronic thermostat to be applied directly to input
voltages from 24 to 277 VAC, 50 or 60Hz. Thermostat
outputs are suitable for connection to relays, valves, and
similar pilot duty loads. The system and fan switches will
handle inductive and resistive loads (see ratings).
Standard models are available as a heating/cooling
thermostat only, thermostat with integral switches for fan
speed selection or fan switching only.