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18
099400
TO TURN OFF GAS TO APPLIANCE
Shutting Off Heater
1. Turn control knob clockwise
Clockwise
to the PILOT position.
2. Press in control knob and turn clockwise
Clockwise
to the OFF position.
Shutting Off Burner Only (pilot stays lit)
1. Turn control knob clockwise
Clockwise
to the PILOT position.
MANUAL LIGHTING PROCEDURE
1. Remove front panel (see Figure 10, page 12).
2. Follow steps 1 through 5 under Lighting Instructions, pages 16 and 17.
3. With control knob pressed in, strike match. Hold match to pilot until pilot
lights.
4. Keep control knob pressed in for 30 seconds after pilot is lit. After 30
seconds, release control knob.
5. Replace front panel.
INSPECTING
BURNER
Check pilot flame pattern and burner flame pattern often.
PILOT FLAME PATTERN
Figure 17 shows a correct pilot flame pattern. Figure 18 shows an incorrect pilot
flame pattern. The incorrect pilot flame is not touching the thermocouple. This will
cause the thermocouple to cool. When the thermocouple cools, the heater will shut
down.
If pilot flame pattern is incorrect, as shown in Figure 18
• turn heater off (see To Turn Off Gas to Appliance, above)
• see Troubleshooting, pages 20 through 23
Thermocouple
GRH/OV 009GOOD PILOT
Thermocouple
Pilot Burner
GRH/OV 008BAD PILOT/LP
Pilot Burner
Figure 17 - Correct Pilot Flame Pattern
Figure 18 - Incorrect Pilot Flame Pattern
OPERATING
HEATER
Continued