... Source Heat PumpMain Parts:1.Compressor: Semi-hermetic Screw Type, Brand Bitzer, Hanbell or Refcomp;2.Evaporator: High Efficiency Shell ... close cell material.5. The electric panel consists of compressor breaker, compressor contactor, phase sequence relay, control circuit breaker, ... system.8. For the units with semi-hermetic screw compressor, an infinitely variable capacity control system that is ...