Maintenance; Fan Control - Mr. Heater MH12B Instrucciones De Operacion Y Manual Del Propietario

Fan Control:

Fan Switch
Figure 6
•
For added heat circulation turn red fan switch to on. The
fan switch is located just left of control knob side handle
support. See Figure 6.
•­
Installation­of­4­D-cell­batteries­(not­included)­is­required­
for­fan­operation.­Battery­box­is­located­on­lower­back­
panel of heater. Follow instructions on battery cover for
correct battery installation.
•­
Heater can also be powered by electrical adapter
F276127.­Required­adapter­to­be­6­volt­DC­up­to­800­
milliamp current with positive tip polarity. The adapter
receptical is located in the center of the battery cover
1/2"­below­thew­top­of­the­cover.
storage compartment
The MH12B has two storage compartments, with
access doors, on the left side of the heater. The forward
compartment­(Ref.A)­can­be­used­to­store­the­6V­power­
adapter­and­/or­spare­fuel­filter­(neither­included).
B
Figure 7
The rear compartment (Ref B) can be used to store a spare 1# pro-
pane tank (not included)
Control Knob
A
Mr. Heater | Portable Propane Heater

MaInTenanCe:

Always keep the heater area clear and free from combus-
tible materials, gasoline and other flammable vapors and
liquids.
Keep­the­vent­areas­
(slots in the bottom
and the top at the
front­of­heater)­
clear at all times.
Visually­inspect­the­
pilot flame and
burner periodically
during use. The
pilot flame should
be blue in color
(not­yellow)­and­will­
extend­beyond­the­thermocouple.­The­flame­will­surround­
the thermocouple just below the tip, see Figure 8.
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-
orange­haze­that­is­visible­on­the­ceramic­tile­is­acceptable)­
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 casing assembly and
main burner assembly. If the pilot is yellow or the burner
has­a­noticeable­flame,­cleaning­may­be­required.­Use­the­
following procedure to inspect the casing assembly and
main burner assembly.
It is necessary to periodically check the burner orifice and
burner venturi tube to make sure they are clear of insects/
nests or spider webs that may accumulate over time. A
clogged tube can lead to a fire.
1 Allow heater to thoroughly cool before performing any
maintenance.
2 Remove disposable 1 lb. cylinder from heater or turn
OFF gas supply at remote cylinder valve, and disconnect
hose from heater.
3­ Remove­(4)­four­screws­that­secure­the­rear­cover­to­the­
Heater.
4 Pivot cover outward from bottom. Release from 2 top
clips. Set aside.
5­ Remove­(4)­four­burner­retaining­screws­and­fuel­line­
from burner assembly. Remove burner assembly from
back of housing.
6 Inspect interior of casing assembly for accumulation
of dust, lint or spider webs. If necessary, clean interior
of casing assembly with a vacuum cleaner or apply air
pressure. Do not damage any components within casing
assembly when you are cleaning.
7 Inspect and clean main burner orifice (threaded into
orifice­holder).­Orifice­holder­is­attached­to­the­burner­
assembly­venturi­with­(2)­two­screws.
8­ Inspect­and­clean­pilot­(mounted­to­bracket)­by­using­a­
E- 6
Operating­Instructions­and­Owner's­Manual
Figure 8