Installation manual

20
104409
UNVENTED NATURAL GAS FIREPLACE
DESA INTERNATIONAL
Locate the blower switch by opening lower
louver on fireplace. Blower switch is lo-
cated 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 tem-
perature.
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.
BLOWER
OPERATION
WARNING: This fireplace has
a three-prong, grounded electri-
cal plug. This plug helps protect
you against electrical shock. Only
connect plug to a properly
grounded, three-prong recep-
tacle. Do not cut or remove the
grounding prong from this plug.
VSGF28NTC/CSGF28NTC
OPERATING
FIREPLACE
Continued
INSPECTING
BURNERS
Check pilot flame pattern and burner flame
patterns often.
PILOT FLAME PATTERN
Figure 43 shows a correct pilot flame pat-
tern. Figure 44 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
Pilot Burner
Figure 43 - Correct Pilot Flame Pattern
Pilot Burner
Thermocouple
Figure 44 - Incorrect Pilot Flame Pattern
If pilot flame pattern is incorrect, as shown
in Figure 44
• turn fireplace off (see To Turn Off Gas to
Appliance, page 18 [Thermostat-con-
trolled models] or page 19 [Manually-
controlled models])
• see Troubleshooting, pages 22 through 24
Blower Kit Model GA3700T
This thermostatically-controlled blower
features a three position switch. The three
settings are: ON, OFF, and AUTO. In the
ON position, the blower will operate con-
stantly. 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. When the heater has been
on approximately 5 minutes, turn the
blower on to deliver heated air at the top
louvers.
IMPORTANT: Light your gas appliance
with the blower off.
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 returns 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.
Note: Periodically check the louvers of
the firebox and remove any dust, dirt, or
other obstructions.
VSGF28NVA ONLY
Blower Kit Model GA3700
This optional non-thermostat blower kit
features a variable control which allows
you to select the speed you desire. After
about 15 minutes, turn the blower on to
deliver heated air at the top louvers. Fol-
low the installation instructions on pages
8 and 9 of this manual.
IMPORTANT: Light your gas appliance
with the blower off.
Note: Periodically check the louvers of
the firebox and remove any dust, dirt, or
other obstructions.