Installation manual

107157-01F
17
17
For more information, visit www.desatech.com
For more information, visit www.desatech.com
Note for GA3650T: If you are using GA3650T blower, your gas
fireplace and 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.
Note: Periodically check the louvers of the firebox and remove
any dust, dirt, or other obstructions.
Follow installation instructions included with the blower accessory.
OPERATING FIREPLACE
Continued
INSPECTING BURNERS
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.
If pilot flame pattern is incorrect, as shown in Figure 32
• turn fireplace off (see To Turn Off Gas to Appliance, page 15
[Thermostat-controlled models] or page 16 [Manually-controlled
models])
• see Troubleshooting, pages 19 through 21
OPERATING FIREPLACE (MANUALLY CONTROLLED MODELS)
Blower Operation (Cont.)
INSPECTING BURNERS
Pilot Flame Pattern
Front Burner Flame Pattern
FRONT BURNER FLAME PATTERN
Figure 33 shows correct front burner flame pattern. Figure 34 shows
incorrect front burner flame pattern. The incorrect burner flame
pattern shows yellow tipping at top of blue flame.
WARNING: If front burner flame pattern shows
yellow tipping, your fireplace could produce increased
levels of carbon monoxide. Follow instructions at
bottom of this page. Yellow flame on rear burner is
normal.
NOTICE: Do not mistake orange flames with yellow
tipping. Dirt or other fine particles are burned by
fireplace, causing brief patches of orange flame.
If front burner flame pattern is incorrect, as shown in Figure 34
• turn fireplace off (see To Turn Off Gas to Appliance, page 15
[Thermostat-controlled models] or page 16 [Manually-controlled
models])
• see Troubleshooting, pages 19 through 21
Thermocouple
Pilot Burner
Figure 31 - Correct Pilot Flame Pattern
Pilot Burner
Thermocouple
Figure 32 - Incorrect Pilot Flame Pattern
Figure 34 - Incorrect Front Burner Flame Pattern
Figure 33 - Correct Front Burner Flame Pattern
Yellow Tipping At Top
of Blue Flame