Monitor GF 500 Owner's Manual page 23

SECTION H
MAINTENANCE AND CHECK
Push operation switch to "OFF" remove the AC Plug from the wall outlet and wait approximately 30 minutes for the
heater to cool before performing any of the following steps.
Checking the Heater Area
Should be kept clean and free from combustible
materials, gasoline and other flammable vapors and
liquids.
Retrieving Objects from Inside the Heater
Should an object fall inside the heater, through the grill
openings, it must be removed to avoid affecting the
operation of the heater.
After allowing the heater to cool, remove the front cover
panel. (See Step 5 of the previous section.) After the
object has been removed, replace the front cover before
attempting to re-start the heater.
Cleaning the Cabinet
When the cabinet is soiled, wipe it with a damp cloth.
Restore the shine with a dry cloth. The use of abrasive
household cleaners may dull the finish.
CAUTION:
Checking the Flue Pipe
At the beginning of each heating season, check the
inside of the flue pipe. Foreign matter, spider webs, etc.
must be removed.
Be sure all fittings and joints are tight.
NOTE: Reassembly and Reseating of the Vent-Air
Intake Pipes
Make sure that all exhaust pipe and intake pipe
connections are firmly mated.
Make sure that the connections between the flue pipe
and exhaust/air intake pipe and hose are secured by the
pipe holder (P/N 4006) and the hose band (P/N 4008).
Cleaning the Interior
Remove the front over panel (as described in Step 5 of
the previous section), and vacuum and wipe away dust
or other accumulation.
Cleaning the Blower Guard
Heating efficiency will be reduced if the blower guard at
rear of the cabinet is blocked with dirt or dust.
Blockage also produces a rise in heat that could cause
the heater to shut off.
Wipe the guard clean at least once a week.
Electric Motor Maintenance
Motors are permanently lubricated and need no
lubrication. Keep fan and motor free of dust and dirt
clean annually.
Checking the Burner Flame
The burner of this appliance does not need cleaning,
but check the burner flame once a year.
Flame pattern should be as shown in the following
figures.
The burner must flame evenly over the entire surface
when operating correctly. The flame must burn with a
clear blue stable flame.
Blue Flame
SATISFACTORY
Yellow Flame
UNSATISFACTORY
Fig.21
Cleaning the Burner
Cleaning the burner requires disassemble of the heat
exchanger and combustion chamber.
/K WARN ING:
Do not attempt to disassemble the heat exchanger and
combustion chamber. This work is critical and must be
done only by an authorized technician.
Storing the Heater
During summer months or long periods when your
heater will not be in operation, take the following steps:
• Clean off the exterior cabinet with a damp cloth, and
brush or vacuum dust from the grills.
• Cover the heater to protect it from dust.
• DO NOT DISASSEMBLE the heater or extension kits.
Replacement of lost parts is an unnecessary expence.
• Shut off fuel supply to unit.
• Disconnect or shut off power supply to unit to prevent
possible damage from lighting or power surge.
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