Integral heat pump bypass circuitry allows electonic bypass of speed control Eliminates overshoots common to on/off and pressure switch controls Helps prevent evaporator freeze-ups, low pressure cut-outs and liquid-slugged compressors in low ambient conditions Features: hard start, low temperature bypass, isolated 24 VAC supply RoHS compliant / lead free design Controls up to 3 refrigeration circuits Typical application: A/C and heat pumps