Cleaning And Maintenance - Mr. Heater MHVFRD10NG Operating Instructions And Owner's Manual

TO TURN OFF GAS TO APPLIANCE
SHUTTING OFF HEATER:
1. Turn off equipment shutoff valve.
2. Turn control knob clockwise to the OFF
position.
SHUTTING OFF BURNER ONLY (PILOT STAYS LIT)
1. Turn control knob clockwise to the PILOT/IGN
position.
INSPECTING BURNER
Check pilot fl ame pattern and burner fl ame pattern
often.
PILOT FLAME PATTERN
Figure 17 show a correct pilot fl ame pattern and an
incorrect pilot fl ame pattern. The incorrect pilot fl ame
pattern is not touching thermocouple. This will cause
the thermocouple to cool. When the thermocouple
cools, the heater will shut down. If pilot fl ame pattern is
incorrect, as shown in Figure 17:
•
Turn heater off (see To Turn OFF Gas to
Appliance, page 10.
•
See Troubleshooting, pages 12-13.
Correct pilot position.

CLEANING AND MAINTENANCE

WARNING: Turn off heater and let cool before
servicing.
For maintenance of the inside cabinet or to access
the burner and pilot assembly for cleaning or service.
Remove the four screws(two located on each side) that
secure the front shell to the unit.(Figure 6) Gently lift
up on the front shell to disengage the hooks and pull
forward to remove it. You will now be able to access all
of the internal components of the appliance.
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 lint
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.
Correct pilot position.
Figure 17
Unvented Natural Gas Fired Room Heater
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 every 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.
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.
Pilot Air Inlet Hole
11
Installation Instructions and Owner's Manual
Pilot Assembly
Figure 18