Rheem Raypak Hi Delta P902C Installation & Operating Instructions Manual page 23

See Fig. 24 for the poolstat/sensor location.
Install limit in supply to pool as shown in Fig. 22. For
data on acceptable pool chemistry, see Table I.
(S6)
MIXING VALVE
*Maximum 4 times the pipe diameter or 12", whichever is less.
Fig. 24: Single Pool Heater Application
Thermostatic Bypass (Standard)
A thermostatically-controlled mixing valve is used to
mix the outlet water with the pool water. This mixed
water is supplied as the inlet water to the pool heater.
The proper configuration is shown in Fig. 25. The
active element of the valve adjusts the mixing ratio to
maintain the inlet water above 105°F.
Fig. 25: Mixing Valve Configuration
Automatic Cold Water Protection (Optional)
P models use a variable speed-pump to maintain the
inlet water temperature 105°F.
(S3)
*Maximum 4 times the pipe diameter or 12", whichever is less.
Fig. 26: Single Pool Heater - Automatic Bypass
Winterizing Your Heater
Heaters installed outdoors in freezing climate areas
should be shut down for the winter. To shut down
heater, turn off manual main gas valve and main gas
shut-off. Close isolation valves and remove water pip-
ing from the in/out header on the heater. Drain the
heater and any piping of all water that may experience
below-freezing temperatures.
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