Cleaning And Maintenance - Mr. Heater MHVFRD20 NGBT Operating Instructions And Owner's Manual

CLEANING AND MAINTENANCE

WARNING: Turn off heater and let cool before
servicing.
CAUTION: You must keep control areas, burner
and circulation air passageways of heater clean.
Inspect these areas of heater before use. Have
the heater inspected yearly by a qualifi ed service
person. Heater may need more frequent cleaning
due to excess lent from carpeting, bedding material,
pet hair, etc.
Make sure grille guard is in place before running
heater. If screen or grille guard is removed for
servicing it must be replaced prior to operating the
heater.
WARNING: Failure to keep the primary air
opening(s) of the burner(s) clean may result in
sooting and property damage.
CLEANING ODS/PILOT AND BURNER
•
Use as vacuum cleaner, pressurized air or
small soft bristled brush to clean.
CLEANING BURNER PILOT AIR HOLE INLET
We recommend that you clean the unit ever 2,500
hours of operation or every three months. We also
recommend that you keep the burner tube and pilot
assembly clean and free of dust and dirt. To clean these
parts we recommend using compressed air no greater
than 30 psig.
This can be done by using a vacuum cleaner in the
blow position, using compressed air in a can, please
follow the directions on the can. If you don't follow
directions on the can you could damage the burner or
pilot assembly. In addition, the directions that follow
should also be followed.
1. Shut off the unit, including the pilot. Allow the
unit to cool for at least thirty minutes.
2. Inspect burner and pilot for dust and dirt.
3. Blow air through the port/slots and holes in the
burner.
A yellow tip on the pilot fl ame indicates dust and dirt in
the pilot assembly. To clean the pilot assembly fi nd the
small pilot air inlet hole about two inches from where
the pilot fl ame comes out of the pilot assembly (see
fi gure 18). With the unit off, lightly blow air through the
air inlet hole. You may blow through a drinking straw if
compressed air is not available.
Pilot Air Inlet Hole
Figure 18
Unvented Natural Gas Vent Free Room Heaters
CLEANING HEATER CABINET
Air passageways
Exterior
Pilot Assembly
Installation Instructions and Owner's Manual
12
•
Use a vacuum cleaner or pressurized air to
clean
•
Use a soft cloth dampened with a mild soap
and water mixture. Wipe the cabinet to remove
dust.