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III. Water Connections
The heat pump inlet and outlet connections are NOT interchangeable. They
must be connected as instructed below.
1. Connect the heat pump in the return water line between the filter and the pool/spa. See page
10, Plumbing Diagrams.
2. Connect the filter outlet to the fitting marked
WATER IN at the bottom front of the unit.
3. Connect the fitting marked
WATER OUT to the return piping to the pool/spa. Unit inlet/outlet
connection fittings are 2-inch PVC unions.
Water connections from the heat pump to the main return line can be PVC pipe or flexible pipe
approved for the purpose and, in either case, should be at least equal in size to the main pool/spa
circulation piping.
4. In cold weather (freeze zone) areas, shutoff valves (ball or gate type) must be installed at the
heat pump inlet and outlet to facilitate service and cold weather drain-down.
5. Operate the pump and check the system for leaks.
Install a check valve and/or a Hartford loop AFTER the heat pump and
BEFORE any chlorinating devices. Install any automatic chemical feeders
AFTER the heat pump. Improper installation of erosion-type automatic
chemical feeders can result in serious damage to, or premature failure of,
the heat pump and will void the heat pump warranty.
IV. Controls and Indicator Lamps
Your heat pump incorporates safety controls and indicators to ensure its safe, reliable operation.
Water Pressure Switch: Prevents operation when the pump is OFF. The unit requires 5 psi
minimum pressure.
Water Temperature Control: Pool/spa water temperature is controlled by the heat pump
thermostat on the unit control panel, which contains a switch and 2 thermostats, one for setting a
heat spa temperature and the other for a swimming pool temperature. The switch can operate an
optional external control system, or can switch between thermostats for pool or spa.
NOTE: The heat pump will not run when the Remote position is selected on
the Pool/Spa selector switch and there is no remote control system attached.
Defrost Switch: Prevents heat pump operation if ambient air temperature falls below a
predetermined safe minimum (approximately 42° F).
Delay Timer: Prevents compressor from short cycling, which could damage or destroy the
hermetic motor/compressor. Upon water temperature control satisfaction, or other control circuit
CAUTION
WARNING