Your new Honeywell CT50A Heating Thermostat will replace most 15 to 30 V, 2-wire heating system thermostats. The CT50A is suitable only for gas or oil heating systems (NOT for air conditioning, heating/air conditioning, heat pump or electric heating systems Model:Honeywell Thermostat CPFILA Page: 4 Note: For opening this Honeywell Thermostat CPFILA User Manual, your … Continue reading Honeywell Thermostat CPFILA User Manual