Mr. Heater MHVFG30TB NG Operating Instructions And Owner's Manual page 12

Note: Your heater may have either pilot assembly.
Figure 17
Figure 21
Correct pilot position.
Figure 22
Incorrect pilot position.
WARNING: Failure to keep the primary air
opening(s) of the burner(s) clean may result in soot-
ing 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.
Unvented Natural Gas Vent Free Heaters
A yellow tip on the pilot flame indicates dust and dirt in
the pilot assembly. To clean the pilot assembly find the
small pilot air inlet hole about two inches from where
the pilot flame comes out of the pilot assembly (see
figure 25). 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
CLEANING HEATER CABINET
Air passageways
•
Use a vacuum cleaner or pressurized air to
clean
Exterior
•
Use a soft cloth dampened with a mild soap
and water mixture. Wipe the cabinet to remove
dust.
12
Installation Instructions and Owner's Manual
Pilot Assembly
Figure 25