... Pump Modular Type Geothermal Heat Pump Used for Central Air ConditioningFunctions: For Air Conditioning (Heating and Cooling) and Domestic Hot ... 23.54.04.54.86.1Control SystemDedicated heat pump controller,PID regulatorSecurityOverload, high voltage, wrong phase, water, ... .722.627.634.544.1Control SystemProfessional heat pump controller,PID regulator,color touch screenSecurityOverload, high voltage, ...