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SECTION G: POOL HEATING
CAUTIO
CAUTION: Power to the heater should be interlocked with the main system pump to make sure the heater does not fire
without the main system pump in operation. Improper flow control can damage the heater. Uncontrolled
flow (too high) or restricted flow (too low) can seriously damage the heater. Follow these instructions to
make sure your heater is properly installed.
The Hi-Delta pool heater is equipped with an external pump and bypass arrangement that blends outlet water with the inlet
to increase the inlet water temperature, thereby reducing the likelihood of condensation forming on the heat exchanger. The
pump also serves to circulate water through the heater form the main system piping.
To complete the installation of the pool heater, the pool thermostat needs to be installed in the main return water line. This
will insure that the heater will be energized at the right time. If the main water line is too far away from the heater and the
capillary bulb will not reach it, locate the pool thermostat adjacent to the main line and run wires back to the heater. See Figure
#9225.
Adjustment of the bypass valve is critical to proper operation of the heater. The bypass valve should be adjusted to achieve
an inlet water temperature of 100°F and an outlet water temperature between 120°F and 140°F. When starting with a cold pool,
make initial adjustments. Make final adjustments when pool water approaches desired temperature.
H BYPASS
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