FMI PFS US VSHRP26M - Manual (Page 17)

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WARNING: Failure to keep
the primary air opening(s) of
the burner(s) clean may result in
sooting and property damage.
ODS/PILOT AND BURNER
Use a vacuum cleaner, pressurized air or
small, soft bristled brush to clean.
BURNER PILOT AIR INLET
The primary air inlet holes allow the proper amount
of air to mix with the gas. This provides a clean
burning flame. Keep these holes clear of dust, dirt
and lint. Clean these air inlet holes prior to each
heating season. Blocked air holes will create soot.
We recommend that you clean the unit every
three months during operation and have heater
inspected yearly by a qualified service person.
Thermocouple
Pilot Burner
Pilot Burner
Thermocouple
Blue Flame
Yellow Flame
INSPECTING HEATERS
Figure 26 - Correct Pilot Flame Pattern
Figure 27 - Incorrect Pilot Flame Pattern
BURNER FLAME PATTERN
Figure 28 shows a correct burner flame pat-
tern. Figure 29 shows an incorrect burner
flame pattern.
If burner flame pattern is incorrect, as shown
in Figure 29
• turn heater off (see To Turn Off Gas to Ap-
pliance, page 15)
• see Troubleshooting, page 18
CLEANING AND MAINTENANCE
Check pilot flame pattern and burner flame
patterns often.
PILOT FLAME PATTERN
Figure 26 shows a correct pilot flame pattern.
Figure 27 shows an incorrect pilot flame pat-
tern. 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 27
• turn heater off (see To Turn Off Gas to Ap-
pliance, page 15)
• see Troubleshooting, page 18
Note: The pilot flame on natural gas units will
have a slight curve, but flame should be blue
and have no yellow or orange color.
WARNING: Turn off heater
and let cool before cleaning.
CAUTION: You must keep
control areas, burner and circu-
lating air passageways of heater
clean. Inspect these areas of
heater before each use. Have
heater inspected yearly by a
qualified service person. Heater
may need more frequent clean-
ing due to excessive lint from
carpeting, bedding material, pet
hair, etc.
Figure 28 - Correct Burner Flame Pattern
Figure 29 - Incorrect Burner Flame
Pattern