Pomona, CA Clemmons, NC Nashville, TN
Tel: 908-355-7995 www.hayward-pool.com
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
23
For Installations with Heater Below Water Level:
1. Be sure the
fi
lter is clean before making the adjustment.
2. Turn ON the
fi
lter pump and ensure all air is out of the water lines, and ensure water
fl
ow rate is at
least the rated minimum (see Table 5).
3. Turn ON the heater and adjust the thermostat to create a call for heat.
4. Turn the adjustment knob on the pressure switch clockwise, until the heater turns off, then turn the knob
¼ turn counter-clockwise, so that the heater turns back on. Turning the adjustment knob clockwise
increases the pressure needed to close the switch.
5. Check the function of the pressure switch by turning the
fi
lter pump on and off several times. The pool
heater should turn off immediately when the pump is turned off. Never allow the heater to operate with
less than the minimum rated water
fl
ow rate.
TWO-SPEED PUMP:
In a few cases the pressure from a two-speed pump is below the 1- pound minimum required to operate the wa-
ter pressure switch on the heater. This is apparent when the pressure switch cannot be further adjusted. In these cases
the pump must be run at high speed to operate the heater. If the pump and piping arrangement are such that the re-
quired 1-pound minimum pressure cannot be obtained, do not attempt to operate the heater. Correct the installation.