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200067-01A
22
INSPECTING BURNERS
IMPORTANT: Owner’s should check pilot flame pattern and burner flame pattern often.
Incorrect flame patterns indicate the need for cleaning (see Care and Maintenance,
page 23) or service.
WARNING: Only a qualified service person should service and
repair heater. This includes maintenance requiring replacement or
alteration of components.
PILOT FLAME PATTERN
Figure 28 - Correct Pilot Flame Pattern
Models VF(18,24)LA-2
Figure 26 - Correct Pilot Flame Pattern
Models VF(18,24)NA-2
Figure 29 - Incorrect Pilot Flame Pattern
Models VF(18,24)LA-2
Figure 27 - Incorrect Pilot Flame Pattern
Models VF(18,24)NA-2
Figures 26 and 28 show a correct pilot flame
pattern. Figure 27 and 29 shows an incorrect
pilot flame pattern. The incorrect pilot flame
is not touching the thermocouple. This will
cause the thermocouple to cool, which shuts
the heater off.
If pilot flame pattern is incorrect, as shown in
Figure 27 or 29
• turn heater off (see
To Turn Off Gas to Ap-
pliance
, page 20)
• see
Troubleshooting
pages 24 through 26.
Approx. 3"-6" Above Top of Logs
More Than 8" Above Top of Logs
Approx. 3"-6" Above Top of Logs
More Than 8" Above Top of Logs
Figure 30 - Correct Burner Flame Pattern
Figure 31 - Incorrect Burner Flame
Pattern
BURNER FLAME PATTERN
Figure 30 shows a correct burner flame pattern. Figure 31 shows an incorrect burner flame
pattern. If burner flame pattern is incorrect then:
• turn heater off (see
To Turn Off Gas to Appliance
, page 20).
• see
Troubleshooting
pages 24 through 26.
BURNER PRIMARY AIR HOLES
Air is drawn into the burner through the holes in the fitting at the entrance to the burner. These
holes may become blocked with dust or lint. Periodically inspect these holes for any blockage
and clean as necessary. Blocked air holes will create soot.
Thermocouple
Thermocouple
Thermocouple
Thermocouple
Pilot Burner
Pilot Burner
