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115580-01A
16
8. Turn control knob counterclockwise
to desired heating level. The burn-
ers should light. Set control knob to any
heat level between HI and LO.
CAUTION: Do not try to ad-
just heating levels by using the
equipment shutoff valve.
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
Turn control knob clockwise
to the
OFF position.
Shutting Off Burners Only (pilot stays lit)
Turn control knob clockwise
to the
PILOT position.
THERMOSTAT CONTROL
OPERATION
The thermostat control knob can be set to any
comfort level between HI and LO. The ther-
mostat will gradually modulate the heat output
and flame height from higher to lower settings
or pilot, in order to maintain the comfort level
you select. The ideal comfort setting will vary
by household depending upon the amount of
space to be heated, the output of the central
heating system, etc.
Note:
Selecting the HI setting with the control
knob will cause the burner to remain fully on,
without modulating down in most cases.
MANUAL LIGHTING
PROCEDURE
1. Follow steps 1 through 5 under
Lighting
Instructions
, page 15.
2. Depress control knob and light pilot with
match.
3. Keep control knob pressed in for 30 seconds
after lighting pilot. After 30 seconds, release
control knob. Now follow step 8 in
Lighting
Instructions
, above.
OPERATING HEATER
Continued
INSPECTING BURNERS
Check pilot flame pattern and burner flame pat-
terns often.
PILOT FLAME PATTERN
Figure 25 shows a correct pilot flame pattern.
Figure 26 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 26
• turn heater off (see
To Turn Off Gas to Appli-
ance
, column 1)
• see
Troubleshooting
, page 18
Note:
The pilot flame on natural gas units will
have a slight curve, but flame should be blue and
have no yellow or orange color.
Figure 25 - Correct Pilot Flame Pattern
Figure 26 - Incorrect Pilot Flame Pattern
Pilot Burner
Thermocouple
Pilot Burner
Propane/LP
Natural Gas
Pilot Burner
Pilot Burner
Thermocouple
Propane/LP
Natural Gas
