Desa Tech GCH480 - Manual (Page 12)

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MAINTENANCE
Repair should be done by a qualified service person. The appliance should be inspected before use and at
least annually by a professional service person. more frequent cleaning may be required due to excessive
debris. it is imperative that control compartments, burners and circulating air passageways of the heater be
kept clean. dust, lint, cobwebs or debris may affect heater performance. The heater draws air into it during
normal operation and in the process dust, lint or debris may be drawn into it. Before cleaning ensure the gas
supply is turned off at the cylinder and the gas control knob is in the “off” position.
Pilot and Burning Inspection
each time you light the heater check that the pilot flame and burner flame patterns are as shown in fugures 4
and 5. if flame patterns are incorrect, turn the heater off and contact your dealer or qualified service person for
assistance. do not operate the heater until the pilot and burner flames are correct.
note: do not mistake orange flames with yellow tipping. dirt or dust particles may enter the burner flames and
cause transient patches of orange flame.
Burner and ODS Pilot Cleaning
clean the exterior with soft bristle brush, vacuum cleaner or pressurized air. never use a wooden toothpick as
it may break off and clog the ods pilot or main burner port.
use a flashlight to inspect the main burner inlet to ensure it is not blocked. if obstruction can be seen, use a
metal coat hanger that has been straightened out. use a vacuum cleaner to clean the primary air openings
to the main burners.
waRning: failuRe To Keep The pRimaRy aiR openings To The BuRneR(s) clean
“may ResulT in sooTing, pRopeRTy damage and incReased caRBon monoxide
pRoducTion”.
in order to clean ods pilot orifice, use pressurized air to blow dust out through the primary air opening on the
side of the pilot.
Cleaning Air Passageways and Unit Casings
figuRe 5
correct Burner flame pattern
figuRe 4 proper pilot flame
correct incorrect
Thermocouple ignitor electrode
correct incorrect
use a vacuum cleaner or pressurized air to clean the combustion and circulating air passageways and a damp
cloth to clean the cabinet/casing.
PROPANE CONSTRUCTION HEATER