P/N 474131 Rev. M 8/2020 MasterTemp Pool and Spa Heater
41
Section 2. Operations
OPERATING INSTRUCTIONS
1. STOP! Read the safety information on (page 40).
2. Set both pool and spa thermostats to the lowest
settings.
3. Turn off all electric power to the appliance.
4. This appliance does not have a pilot. It is equipped
with an ignition device which automatically lights the
burner. Do not try to light the burner by hand.
5. Turn off the outside external manual shut-off gas
valve, see Figure 39.
6. Wait ve (5) minutes to clear out any gas. If you then
smell gas, STOP! Follow “B” in the “Before Start-up”
instructions (page 40). If you don’t smell gas, go to
the next step.
7. Turn on the outside external manual shut-off gas
valve, see Figure 39.
8. Set 3-way valves on inlet and outlet to pool or spa, as appropriate.
9. Turn on all electric power to the appliance.
10. Press either the POOL ON or SPA ON button switch on the operating control.
11. Set the thermostat to desired setting (NOTICE: Setpoint must be above actual water temperature or burner will not re).
See “CONTROL PANEL” page 44.
12. The blower should come on immediately, and after about 20 seconds, the burner should re. When operating for the rst time,
the burner may not re on the rst try because of air in the gas line. If it does not re at rst, push the OFF switch, wait ve
minutes, and again push the POOL or SPA ON switch. The burner should re after about 20 seconds. You may have to repeat
this until all of the air has cleared the gas line.
13. The burner should re until the pool/spa temperature reaches the desired temperature set on the thermostat. The blower will
continue to run for about 45 seconds after the burner shuts off. If any of the safety interlocks should open during burner operation,
the burner shuts off immediately, but the blower continues to run for about 45 seconds. Should overheating occur or the gas
supply fail to shut off, turn off the manual gas control valve to the appliance.
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.
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 39.
External Manual
Shut-off Valve
TO TURN OFF GAS TO APPLIANCE
Figure 39.
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