... reset, high pressure switch with manual reset.The heat pump unit is completed also with 4-way valve,liquid receiver ... vent valve, water drain connection, water circuit safety valve, water pump (For smaller size than 30 model),expansion vessel, male-threaded hydraulic ... )Water pump protection breaker(5)Fan motor protection breaker;(6)Control circuit protection breaker;(7)Phase sequence relay (only for 3 ...