... the operation much more reliable.Accessories of NJ-BF2.0Z, NJ-BF3.0Z, NJ-BF4.0Z, NJ-BF5.0Z:Copeland semi-hermetic piston compressor ... controls, motor overheat protector, junction box(IP55).Accessories of NJ-BF10Z, NJ-BF20Z, NJ-BF25Z:Copeland semi-hermetic piston compressor, oil separators, air ...