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9. Wait 5 minutes to clear out any gas. Then smell for gas, especially near the floor. If you then smell
gas, STOP! Follow the steps in the safety information on the front cover of this manual. If you do not
smell gas, go to next step.
10. Turn on all electrical power to the appliance.
11. Set thermostat to desired setting. The appliance will operate. The igniter will glow after the pre-purge
time delay (15 seconds). After igniter reaches temperature (30 seconds) the main valve should open.
System will try for ignition one time. If flame is not sensed, lockout will commence.
12. If the appliance will not operate, follow the instructions "To Turn Off Gas To Appliance" on page 100,
and call your service technician or gas supplier.
13. Replace upper front panel.
14. If heater fails to start, verify the following:
a. There are no loose connections or that the service switch is off.
b. Auto reset high limit is not tripped.
c. Enable/Disable circuit is closed.
d. Gas is on at the meter and the heater.
e. Incoming dynamic gas pressure to the gas valve is NOT less than that required per Table 14.
TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater on completion of the installation, such as on a building site
or where the premises are vacant, then:
•
Switch off the electrical supply at the water heaters isolation switch. NOTE: If the water heater is
correctly installed, this will also shut down the circulating pump.
•
Close the gas isolation valve at the inlet to the water heater.
•
Close the cold water isolation valve at the inlet to the water heater.
•
Close the isolation valves on the cold and hot water branches to shut down an individual water
heater in a bank (water heating applications only).
TO TURN OFF GAS TO APPLIANCE
1. Shut off manual gas valve field installed near gas inlet connection on back of heater.
2. Remove upper front panel.
3. Adjust set point to lowest setting.
4. Turn off all electrical power to the appliance if service is to be performed.
5. Replace access panel.
100
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