functions as an evaporator and water side heat exchanger function as a condenser.
Vapor-liquid separator:
Stores liquid refrigerant to protect the compressor from liquid hammering.
Oil separator:
Separates oil from gas refrigerant pumped out of the compressor and quickly returns it to the compressor. Separation efficiency
is up to 99%.
Plate heat exchanger (economizer):
In cooling mode, it can improve super-cooling degree and the super-cooled refrigerant can achieve better heat exchange in
indoor side. In heating mode, the refrigerant comes from the plate heat exchanger going to the compressor can enhance the
refrigerant enthalpy and improve the heating capacity in low ambient temperature. Refrigerant volume in plate heat exchanger is
controlled according to temperature different between plate heat exchanger inlet and outlet.
Electronic expansion valve:
Controls refrigerant flow and reduces refrigerant pressure.
Solenoid valve SV5 (defrost):
Multiple functions for enhancing reliability.
Solenoid valve SV6 (by pass):
Increase refrigerant flow.
Solenoid valve SV8A, SV8B (injection):
Enhance enthalpy and capacity.
High and low pressure switches:
Regulate refrigerant system pressure. When the refrigerant system pressure rises above the upper limit or falls below the lower
limit, the high or low pressure switches turn off, stopping the compressor.
Discharge temperature switch:
Protects the compressor from abnormally high temperatures and transient spikes in temperature.
High pressure sensor:
Measures compressor discharge side pressure of refrigerant.
Low pressure sensor:
Measures compressor suction side pressure of refrigerant.
Discharge valve:
Automatically removes air from the water circuit.
Safety valve (water side):
Prevents excessive water pressure by opening at 6bar and discharging water from the water circuit.
Water flow switch:
Detects water flow rate to protect the compressor and water pump in the event of insufficient water flow.
Safety valve (refrigerant side):
Prevents excessive refrigerant pressure by opening at 42bar and discharging refrigerant from the refrigerant system.
Crankcase heater:
Prevents refrigerant from mixing with compressor oil when the compressors are stopped.
Water side heat exchanger electric heater:
Protects the water side heat exchanger from ice formation.
Water flow switch electric heater:
Protects the water from ice formation.
Pin valve (high and low pressure side):
Charges or discharges refrigerant.
Capillary:
Normally return oil to the compressor.
Wired Controller:
Control and query the operation status of the unit.
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