Hayward HeatPro Heat Pro Owners Operations & Parts Manual - Page 6

Page 6 of 22 How a Heat Pump Works HEATPRO HEAT PUMP HP13023772 Rev: D TXV C A HEAT FROM AIR B AIR COIL (EVAPORATOR) E HOT WATER OUT D COLD WATER IN COMPRESSOR WATER HEAT EXCHANGER (CONDENSER) The heat pump takes heat from the environment and uses it to heat the pool water. During heat pump operation, high temperature, high-pressure sub cooled liquid Refrigerant (A) is throttled by Metering Device (TXV) and turned into low temperature, low-pressure saturated liquid (B). The two-phase Refrigerant flows through the Air Coil (Evaporator), where the liquid refrigerant evaporates into vapor by absorbing heat from the surrounding air. At the outlet of the Air Coil (Evaporator) it becomes a low temperature, low-pressure superheated vapor (C). The Compressor receives this flow at the suction line (D), and compresses it into a high temperature, high pressure superheated vapor, which is discharged from the Compressor (E) and flows into the Water Heat Exchanger (Condenser). The heat carried by the flow is then released to the surrounding water from the pool. At the same time, the high temperature, high-pressure superheated vapor is then condensed back to high-pressure sub cooled liquid (A), which completes the cycle. The water, which is being forced through the Water Heat Exchanger (Condenser) by the pool pump, is heated as it passes through. Becoming Familiar with Your Heat Pump Heat Pump Protection Features Hayward heat pumps are equipped with safeguards that will stop operation to protect the unit in case of the following events: • Excessively high refrigerant pressure • Excessively high water temperature • Loss of refrigerant • Fan Motor Failure • Evaporator Freeze-up • Low Ambient Temperature USE ONLY HAYWARD GENUINE REPLACEMENT PARTS Pomona, CA Clemmons, NC Nashville, TN Tel: 908.351.5400 www.haywardpool.com