Inspecting heaters
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.
Blue Flame
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
Figure 28 - Correct Burner Flame Pattern
Thermocouple
Pilot Burner
Figure 26 - Correct Pilot Flame Pattern
Yellow Flame
Thermocouple | Pilot Burner |
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Figure 27 - Incorrect Pilot Flame Pattern
Figure 29 - Incorrect Burner Flame
Pattern
Cleaning and Maintenance
WARNING: Turn off heater and let cool before cleaning.
CAUTION: You must keep control areas, burner and circulating 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 cleaning due to excessive lint from carpeting, bedding material, pet hair, etc.
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
Theprimaryairinletholesallowtheproperamount 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.
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