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Section 4. Operation
TO TURN OFF GAS TO APPLIANCE
1. Press the OFF button on operating control.
2. Switch off all electric power to the unit.
3. Turn off the outside external manual shut-off gas valve, see Figure 27.
14. If the appliance will not operate, follow the instructions below “TO TURN OFF GAS TO THE
APPLIANCE”, and call your service technician or gas supplier.
15. If the electrical power is lost while the heater is running, the heater will retain all program
settings and the unit will come back to it’s original mode and settings once the power is
restored.
SAFETY CONTROLS
AIR FLOW SWITCH (AFS)
The air flow switch, (see Figure 28), is a safety device used to
insure that the combustion air blower (fan) is operating and has
been designed to monitor the vacuum (negative) pressure within
the blower housing. The air flow switch is factory set and is
connected upstream of the ignition module. The ignition module
does not operate unless the air pressure switch and all safety
switches are closed.
WATER PRESSURE SWITCH
Water
Pressure
Switch
Hazardous pressure. Do not bypass the Water Pressure
Switch or render it inoperable.
!
WARNING
Figure 28.
Figure 29.
Air Flow Switch
The water pressure switch, (see Figure 29). If the water flow is
restricted, the water pressure switch may prevent the burner from
firing and cause the “Service System” light to go on. If the light
remains on after the filter has been serviced, have a qualified
service technician check the system.
For deck-level heater installations, the Water Pressure Switch is
factory set at 20.6 kPa (3.00 psi).
NOTE:
See, Below Pool Level
Installation instructions on page 13.
If the pressure switch is .3M
(1 ft.) below or above the pool water level, reset the switch so that
it is open when the pump is off and closed when the pump is running. Turn the star-wheel on the
switch clockwise ( ) to raise setting (heater below the pool) and counterclockwise ( ) to lower
the setting (heater above the pool – see Figure 30. Test the switch after resetting.
NOTICE:
When the heater is mounted more than 1.5M (5 ft.) above or 1.2M (4 ft.) below the deck
level, a Pressure Switch is no longer adequate. A Flow Switch must be installed instead.
NOTICE:
Heater operation with incorrect Pressure Switch setting may cause operation with no
water flow. Operation of the heater without sufficient water flow may severely damage it and
will
void the warranty.
