Rheem Raypak Hi Delta H Series Installation & Operating Instructions Manual page 23

See Fig. 23 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.
*Maximum 4 times the pipe diameter or 12", whichever is less.
Fig. 24: Single Pool Heater - H-Bypass
H-Bypass (Standard)
Adjustment of the manual bypass valve is critical to
proper operation of the heater. The manual bypass
valve should be adjusted to achieve a minimum inlet
water temperature of 105°F and an outlet water tem-
perature below 140°F. When starting with a cold pool,
make initial adjustments. Make final adjustments
when pool water approaches desired temperature.
The use of a bypass is required for proper operation in
a pool heating application. Refer to Fig. 24. Use the
following instructions to set the manual bypass:
1. Set Valve A (the bypass) to
Valve B to fully open position.
2. Turn on pump.
3. Turn on heater and wait until heater goes to full
fire.
4. Adjust Valve A until the inlet water temperature is
105°F. NOTE: Opening the valve will increase the
temperature and closing the valve will decrease
the temperature.
5. If this process does not raise the inlet water tem-
perature to 105°F and Valve A is fully open, then
slowly throttle Valve B closed to increase the inlet
water temperature to 105°F.
⁄ open position, and
1
2
23
Fig. 25: "H" Bypass Adjustment
Automatic Cold Water Protection (Optional)
P models use a variable speed pump to maintain the
inlet water temperature 105°F.
*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.