Desa CGCF26TN - Manual (Page 18)

111044-01A
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18
TO TURN OFF GAS
TO APPLIANCE
The thermostatic control used on this fireplace differs from
standard thermostats. Standard thermostats simply turn on
and off the burner. The thermostat used on this fireplace senses
the room temperature. The thermostat adjusts the amount of
gas flow to the burner. This increases or decreases the burner
flame height. At times the heater 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 measures the temperature
of air near the fireplace cabinet. This may not always agree with
room temperature (depending on housing construction, instal-
lation location, room size, open air temperatures, etc.). Fre-
quent use of your fireplace will let you determine your own
comfort levels.
OPERATING FIREPLACE
Continued
1. Follow steps 1 through 5 under Lighting Instructions, page 17.
2. With control knob pressed in, strike match. Hold match to
pilot until pilot lights.
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 17.
Shutting Off Fireplace
1. Turn control knob clockwise
Clockwise
to the OFF position.
2. Turn off all electric power to the appliance if service is to
be performed.
Shutting Off Burner Only (pilot stays lit)
Turn control knob clockwise
Clockwise
to the PILOT position.
THERMOSTAT
CONTROL OPERATION
MANUAL LIGHTING
PROCEDURE
INSPECTING BURNER
Thermocouple
Pilot Burner
Figure 32 - Correct Pilot
Flame Pattern (Propane/LP
Shown) Figure 33 - Incorrect Pilot
Flame Pattern (Propane/LP
Shown)
Check pilot flame pattern and burner flame pattern often.
PILOT FLAME PATTERN
Figure 32 shows a correct pilot flame pattern. Figure 33 shows an
incorrect pilot flame pattern. The incorrect pilot flame is not properly
heating the thermocouple. This will cause the thermocouple to cool.
When the thermocouple cools, the fireplace will shut down.
If pilot flame pattern is incorrect, as shown in Figure 33
• turn fireplace off (see To Turn Off Gas to Appliance)
• see Troubleshooting, pages 20 through 22
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.
Thermocouple
Pilot Burner
Figure 34 - Correct Burner Flame Pattern
Figure 35 - Incorrect Burner Flame Pattern
BURNER FLAME PATTERN
Figure 34 shows a correct burner flame pattern. Figure 35 shows an
incorrect burner flame pattern. The incorrect burner flame pattern
shows sporadic, irregular flame tipping. The flame should not be
dark or have an orange/reddish tinge.
Note: When using the fireplace the first time, the flame will be
orange for approximately one hour until the log cures.
If burner flame pattern is incorrect, as shown in Figure 35
• turn fireplace off (see To Turn Off Gas to Appliance)
• see Troubleshooting, pages 20 through 22
OPERATING FIREPLACE
To Turn Off Gas To Appliance
Thermostat Control Operation
Manual Lighting Procedure
INSPECTING BURNER
Pilot Flame Pattern
Burner Flame Pattern