Desa CF26PTA - Manual (Page 20)

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OPERATING FIREPLACE
Continued
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater
Turn control knob clockwise to the OFF
position.
Shutting Off Burner 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 6 under Lighting
Instructions, page 19.
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 under
Lighting Instructions, page 19.
INSPECTING BURNERS
Check pilot flame pattern and burner flame pat-
terns often.
PILOT FLAME PATTERN
Figure 31 shows a correct pilot flame pattern.
Figure 32 shows an incorrect pilot flame pattern.
The incorrect pilot flame is not properly heating
the thermocouple. When the thermocouple cools,
the heater will shut down.
If pilot flame pattern is incorrect, as shown in
Figure 32
• turn heater off (see To Turn Off Gas to Appli-
ance, column 1)
• see Troubleshooting, page 23
Note:
The correct pilot flame on natural gas units
will have a slight curve, but flame should be blue
and have no yellow or orange color.
Figure 31 - Correct Pilot Flame Pattern
(propane/LP ignitor shown)
Figure 32 - Incorrect Pilot Flame Pattern
(propane/LP ignitor shown)
Pilot Burner
Thermocouple
Pilot Burner
Thermocouple