Inspecting Burners - Desa Variable Manually-Controlled Models Owner's Operation And Installation Manual

OPERATING
FIREPLACE
All Models
INSPECTING
BURNERS
26
This fireplace has a three-prong, grounded electrical plug. This
plug helps protect you against electrical shock. Only connect
plug to a properly grounded, three-prong receptacle. Do not cut
or remove the grounding prong from this plug.
Locate the blower switch by opening lower louver on fireplace. Blower switch is
located at lower left inside louver door.
Thermostat-controlled blowers have three settings: ON, OFF, and AUTO. In the ON
position, the blower will operate constantly. In the OFF position, the blower will not
operate. In the AUTO position, the blower will start when the thermostat senses a
sufficient increase in firebox temperature.
Note: Your gas logs and thermostat blower will not turn on and off at the same time.
The fireplace may run for several minutes before the blower turns on. After the
heater modulates to the pilot position, the blower will continue to run. The blower
will shut off after the firebox temperature decreases.
Note: It is safe to operate fireplace with blower turned off. However, the blower
helps distribute heated air from the fireplace.
Manual blowers on manually-controlled models have an ON and OFF position.
Check pilot flame pattern and burner flame patterns 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 touching the thermocouple. This will cause the
thermocouple to cool. When the thermocouple cools, the fireplace will shut down.
Thermocouple
Figure 31 - Correct Pilot
Flame Pattern
If pilot flame pattern is incorrect, as shown in Figure 32
• turn fireplace off (see To Turn Off Gas to Appliance, page 23 [Thermostat-
controlled models} or page 25 [Manually-controlled models])
• see Troubleshooting, pages 28 through 31
BLOWER OPERATION
WARNING
Thermocouple
Pilot Burner
Pilot Burner
Figure 32 - Incorrect Pilot
Flame Pattern
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