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VENT-FREE PROPANE/LP GAS HEATER
OPERATING
HEATER
Continued
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
1.
Turn control knob clockwise
to the OFF position.
2.
Turn off all electric power to the ap-
pliance if service is to be performed.
Shutting Off Burner Only (pilot
stays lit)
Turn control knob clockwise
the PILOT position.
THERMOSTAT
CONTROL
OPERATION
The thermostatic control used on these
models differs from standard thermo-
stats. Standard thermostats simply turn
on and off the burner. The thermostat
used on this heater senses the room tem-
perature. The thermostat adjusts the
amount of gas flow to the burner. This
increases or decreases the burner flame
height. At times the room may exceed the
set temperature. If so, the burner will
shut off. The burner will cycle back on
when room temperature drops below the
set temperature. The control knob can be
set to any heat level between HI and LO.
Note: The thermostat sensing bulb mea-
sures the temperature of air near the
heater cabinet. This may not always agree
with room temperature (depending on
housing construction, installation loca-
tion, room size, open air temperatures,
etc.). Frequent use of your heater will let
you determine your own comfort levels.
MANUAL LIGHTING
PROCEDURE
1.
Remove front panel (see Figure 10,
page 8).
2.
Follow steps 1 through 5 under Light-
ing Instructions, page 11.
3.
With control knob pressed in, strike
match. Hold match to pilot until pi-
lot lights.
Clockwise
4.
Keep control knob pressed in for 30
seconds after lighting pilot. After 30
seconds, release control knob. Follow
step 8 under Lighting Instructions,
page 11.
5.
Replace front panel.
to
Clockwise
INSPECTING
BURNER
Check pilot flame pattern and burner flame
pattern often.
PILOT FLAME PATTERN
Figure 18 shows a correct pilot flame pattern.
Figure 19 shows an incorrect pilot flame
pattern. The incorrect pilot flame is not touch-
ing the thermocouple. This will cause the
thermocouple to cool. When the thermo-
couple cools, the heater will shut down.
If pilot flame pattern is incorrect, as shown
in Figure 19
• turn heater off (see To Turn Off Gas to
Appliance, column 1)
• see Troubleshooting, pages 14 through 16
Thermocouple
GOOD PILOT/LP
Figure 18 - Correct Pilot Flame Pattern
Thermocouple
BAD PILOT/LP
Figure 19 - Incorrect Pilot Flame Pattern
BURNER FLAME PATTERN
Figure 20 shows a correct burner flame
pattern. Figure 21 shows an incorrect burner
flame pattern. The incorrect burner flame
pattern shows yellow tipping of the flame. It
also shows the flame higher than 1/2 the
glass panel height.
If burner flame pattern is incorrect, as shown
in Figure 21
• turn heater off (see To Turn Off Gas to
• see Troubleshooting, pages 14 through 16
Figure 20 - Correct Burner Flame Pattern
Pilot Burner
GRH/OV 007
Figure 21 - Incorrect Burner Flame Pattern
Pilot Burner
GRH/OV 008
12
WARNING: If yellow tipping
occurs, your heater could pro-
duce increased levels of carbon
monoxide. If burner flame pat-
tern shows yellow tipping, follow
the instructions below.
NOTICE: Do not mistake orange
flames with yellow tipping. Dust
or other fine particles enter the
heater and burn causing brief
patches of orange flame.
Appliance, column 1)
1/2 GLASS HEIGHT
Yellow
Tipping
1/2 GLASS HEIGHT
104268
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