INSPECTING FLAMEPATTERN
Check pilot flame pattern and burner flame patterns often.
PILOT FLAME PATTERN
Figure 17 shows a correct pilot flame pattern. Figure 18 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 heater will shut down. If pilot flame pat- tern is incorrect, as shown in Figure 18.
•Turn heater off (see TO TURN OFF GAS TO APPLIANCE)
•See troubleshooting
Figure 19 - Correct Flame Pattern with heater set to High Flame
Figure 20 - Incorrect Flame Pattern
with heater set to High Flame
DISCONNECT WIRING OR CONTROL MODULE
1.Remove screws from the rear con- trol panel, take out thermostat sens- ing bulb from the clip, then discon- nect the wires from control module.
2.Remove two screws and hex nuts, securing control module. When installing, reverse the steps above. (See Figure 21 and Figure 25)
Figure 21 - Control Module Access
DISCONNECT FAN
Figure 17 - Correct Pilot Flame
Pattern
Figure 18 - Incorrect Pilot Flame Pattern
BURNERFLAMEPATTERN
Figure 19 shows a correct burner flame pattern. Figure 20 shows an incorrect burner flame pattern. If burner flame is incorrect:
•Turn heater off (see TO TURN OFF GAS TO APPLIANCE)
•See troubleshooting
CLEANING AND MAIN- TENANCE
WARNING: Disconnect power be- fore attempting any maintenance or cleaning to reduce the risk of fire , elec- tric shook or personal injury. Turn off heater and let cool before cleaning.
WARNING: Failure to keep pri- mary/air openings of burners clean may result in sooting and property damage.
CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause im- proper and dangerous operation. Verify proper operation after servicing.
CAUTION: You must keep control areas, burner, and circulating air pas- sageways 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, bed- ding material, pet hair, etc.
1.Remove screws from the fan bracket panel, pull the fan bracket panel out to remove. Disconnect two wires from fan
2.Mark or tag each wire removed for its exact reconnection. Remove the four screws from the fan. When installing, reverse the steps above. (See Figure 22 and Figure 25)
Figure 22 - Fan Access
CLEANING BURNER INJECTOR HOLDER AND PILOT AIR INLET HOLE We recommend that you clean the unit every 2,500 hours of operation or every three months.
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, lint, and pet hair. 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 opera- tion and have heater inspected yearly by a qualified service person.
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