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Installation and User’s Guide
Professional Maintenance and Service
The Pentair line of Heat Pumps are some of the most efficient ways to heat a pool or spa. The heat pump
transfers heat from the outside air to the pool or spa water by means of an internal heat exchanger.
When the fan is turned on, warm air is drawn through the R410A refrigerant charged air coil, turning the cold
liquid refrigerant to a warm gas. The gas then flows through the compressor, which increases the pressure and
refrigerant temperature. The hot refrigerant gas enters the water-to-gas heat exchanger where the water is
heated and returned to the pool. During this heat exchange process the refrigerant is cooled and returned to the
air coil and the cycle repeats.
NOTE:
The maximum heat output and efficiency of a heat pump is dependent upon the quality and performance
of the major components used. Equally important are the environmental conditions (for example, air temperature,
humidity, water temperature, and wind). To maintain maximum performance and efficiency, keep the air coil
clean from dirt and debris. It is recommended to clean your air coil once a year by flushing the coil with
compressed air or hosing off the coil with a garden hose. Care should be taken to not bend the coil fins as this
will restrict the airflow and lower your heat pump performance.
DO NOT USE A PRESSURE CLEANER ON
THE UNIT.
WARM
AIR IN
COLD
AIR OUT
FAN
EVAPORATOR
COIL
WATER
OUTLET
(Warm)
WATER
INLET
(Cold)
Figure 23.
Typical Heating Cycle
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