Desa VTGF33PRB - Manual (Page 24)

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OPERATING FIREPLACE
Continued
TO TURN OFF GAS
TO APPLIANCE
Shutting Off Heater When Manually Lit
Set manual ignition bypass switch on control pan-
el to OFF (automatic ignition position). This will
cause the controls to shut down the fireplace.
OPTIONAL BLOWER
OPERATION
Locate the blower switch by opening lower
louver on fireplace. Blower switch is located at
lower left inside louver door.
Note:
It is safe to operate fireplace with blower
turned off. However, the blower helps distribute
heated air from the fireplace.
Follow installation instructions included with
the blower accessory.
OPERATING
FAN
This blower has three settings: ON, OFF and
AUTO. In the ON position, the blower will oper-
ate 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 fireplace 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.
Figure 40 - AUTO/OFF/ON Switch
AUTO/OFF/ON Switch
Piezo Ignitor
Fan Switch
INSPECTING BURNERS
Check pilot flame pattern and burner flame pat-
terns often.
PILOT FLAME PATTERN
Figure 41 shows a correct pilot flame pattern.
Figure 42 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 42
• turn heater off (see To Turn Off Gas to Appli-
ance, page 23 or column 1)
• see Troubleshooting, page 27
Note:
The pilot flame on natural gas units will
have a slight curve, but the flame should be blue
and have no yellow or orange color.
Pilot
Burner
Thermocouple
Figure 41 - Correct Pilot Flame Pattern
(Propane/LP Pilot Shown)
Figure 42 - Incorrect Pilot Flame Pattern
(Natural Gas Pilot Shown)
Manual Ignitor Electrode
Automatic Ignitor
Electrode
Pilot
Burner
Thermocouple
Manual Ignitor Electrode
Automatic Ignitor
Electrode