Fan coil relay control center for operating line voltage, 3-speed fan motor with low voltage controls; For 2- or 4-pipe, heat pump, auto-changeover applications Ability to operate line voltage, 3-speed fan motor with low voltage controls Compatible with 4-pipe, 2-pipe, heat pump, auto changeover 20 VA 24 VAC power supply Suitable for 1/8 HP motors 1/4"" quick connect terminal Mounts with standard 3"" track UL Recognized Â