Specifications

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Typical Cooling Refrigeration Cycle – Dual
Compressors
Note: Typical temperature readings are at full load conditions
at ISO-13256 for boiler-tower applications.
When the wall thermostat calls for COOLING, the revers-
ingvalve(de-energized)directstheowoftherefrigerant,
a hot gas, from the compressor to the water-to-refrigerant
heat exchanger (coaxial heat exchanger). There, the heat is
removed by the water, and the hot gas condenses to become
aliquid.Theliquidthenowsthroughathermalexpansion
valve to the air-to-refrigerant heat exchanger coil (evapora-
tor). The liquid then evaporates and becomes a gas, at the
same time absorbing heat and cooling the air passing over the
surfacesofthecoil.Therefrigerantthenowsasalowpres-
sure gas through the reversing valve and back to the suction
side of the compressor to complete the cycle.
Figure 37: Cooling Refrigeration Cycle