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How Does the pool/spa heat pump work?
In the Heating Mode...
Sun-warmed air is the energy
resource utilized by heat pumps. The heat pump draws in
and upgrades large quantities of low-grade heat already existing in the air
and transfers it to the pool and spa water. This is accomplished by
utilizing minimal amounts of electricity and freon gas, along with a high
powered fan, super-efficient compressor and your already existing pool pump.
The process is similar to your refrigerator or air conditioner, only in
reverse.
Step 1) Large quantities of
warm air are drawn through the evaporator coils by a high-powered fan.
 Step
2) Freon liquid inside these evaporator coils absorbs the heat from the
drawn-in air, changing the freon liquid into warm freon gas.
Step 3) The warm freon gas is then passed through
a compressor - which compresses or reduces the volume of gas while
substantially increasing its temperature.
Step 4) This compressed hot freon gas is then
pumped through the outer casing of the freon-to-water heat exchanger where
it releases its heat to the pool or spa water passing through the inner
casing of the heat exchanger. The now warm water is released back into the
pool or spa for recirculation through the heat pump until the desired
temperature is reached. The freon gas condenses back into a liquid state and
is pumped through the system back to the evaporator coils to repeat the
cycle
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