Hayward HeatPro® Heat Pro All Models - Page 3

How a Heat Pump Works Hayward Heat Pumps take heat from the environment and use it to heat your pool water. During heat pump operation, liquid freon from inside the unit is pumped through the system (A) and is turned into a heated gas. This happens when heat is taken from the surrounding air (B) as it is drawn through the evaporator by the fan. The compressor (C) receives this warmer gas and compresses it to a higher pressure, resulting in the freon reaching even higher temperatures. As the unit sends the heated gas through the heat exchanger, the gas gives up its heat to the surrounding water (D). The freon reverts to a liquid state as it gives up the heat to the pool water, which completes the cycle (A). The water (F), which is being forced through the heat exchanger (D) by your pool pump, is heated by three to five degrees as it passes through and returned to your pool as heated water. (G) This process can also be reversed to remove heat from pool water. A heat pump can transform 4 to 6 units of heat energy (BTU's) for every 1 equivalent unit of electrical energy it consumes. This results in a coefficient of performance between 4 and 6. The specific performance coefficient depends on your heater model, ambient air temperature and climatic conditions, as well as incoming pool water temperatures. 2