Mr. Heater MH9BX Operating Instructions And Owner's Manual page 7

NEVER LEAVE THE HEATER UNATTENDED WHILE BURNING! NEVER LEAVE THE HEATER UNATTENDED WHILE BURNING! NEVER LEAVE THE HEATER UNATTENDED WHILE BURNING!
IMPORTANT: The heater and its
surroundings should be kept clean and
free of dust.
• Visually inspect the pilot flame and
burner periodically during use. The
pilot flame should be blue in color
(not yellow) and will extend to the
thermocouple. The flame will surround
the thermocouple just below the tip.
See Figure 5.
• A slight yellow flame may occur where
the pilot flame and main burner
flame meet. The burner should be
bright orange (with a slight blue color
around the border, a red-orange haze
that is visible on the ceramic tile is
acceptable) and without a noticeable
flame.
• A blue flame that rolls out at the
top of the ceramic tile indicates an
accumulation of dust, lint or spider
webs inside the housing assembly and
main burner assembly. If the pilot is
yellow or the burner has a noticeable
flame, cleaning may be required.
• It is necessary to periodically check the
burner orifice and burner venturi to
make sure that they are clear of things
such as insect nests and spider webs
that may accumulate over time. A
clogged tube can lead to a fire.
• Use the following procedure to inspect
the casing assembly and main burner
assembly.
Cleaning Instructions (Refer to
Exploded Parts on Page 10):
IMPOR TANT: Allow heater to
thoroughly cool before performing any
maintenance.
1. Remove disposable 1 lb. cylinder
from heater or turn OFF gas supply at
remote cylinder valve, and disconnect
hose from heater.
2. Remove (4) four screws that secure the
rear cover (ref. # 7) to the heater.
3. Pivot cover outward from bottom.
Release from 2 top clips. Set aside.
4. Remove (4) four burner retaining
screws and fuel line from burner
assembly. Remove burner assembly
(ref. # 16) from back of housing.
5. Inspect interior of housing for
accumulation of dust, lint or spider
webs. If necessary, clean interior
housing with a vacuum cleaner or
apply air pressure. Do not damage
any components within the housing
assembly when you are cleaning.
6. Inspect and clean main burner orifice
(threaded into orifice holder). Orifice
holder (ref.# 19) is attached to the
burner assembly venturi with (2) two
screws.
7. Inspect and clean pilot (mounted to
bracket) by using a vacuum or apply air
pressure through the holes in the pilot
indicated by the arrows in Figure 5.
8. Apply air pressure (max. 30 psi.) into
ceramic tile of burner assembly and
the venturi tube to remove dust, lint or
spider webs.
9. Reassemble main burner orifice holder
onto the burner assembly.
10. Reinstall burner assembly into the
heater housing.
1 1. Reinstall fuel line and check for leaks.
12. Install heater back cover.
13. The exterior of the heater can be
cleaned with a damp cloth. Avoid the
direct use of any aerosol or spray-on
cleaners. Do not use abrasive materials
or cleaners on the decals or control
knob.
OFFSEASON
• If the heater is to left "OFF" for a
considerable period of time, the
propane (LP) gas supply to the heater
should be turned off as close to the
gas source as possible. In the case
of portable use, the gas should be
turned off at the propane (LP) gas
supply cylinder.
• If the heater is put into storage, make
sure to disconnect the propane (LP)
gas cylinder.
• When the LP-gas cylinder is not
disconnected from the heater, the
heater and cylinder must be located
outdoors, in a well-ventilated space,
out of the reach of children, and must
not be stored in a building, garage, or
any other enclosed area.
• Storage of the heater indoors is
permissible only if the cylinder is
disconnected and removed from
the heater. Cylinders must be stored
outdoors, in a well-ventilated space,
out of the reach of children, and must
not be stored in a building, garage, or
any other enclosed area.
Mr. Heater | Portable Buddy Radiant Heater
wires or similar cylindrical objects to
clean the pilot to avoid damaging the
calibrated ruby that controls the gas
flow through the pilot orifice.
7
Operating Instructions and Owner's Manual
Figure 5
WARNING: Never use needles,