Maintenance; Troubleshooting - Mr. Heater MH4BDF Operating Instructions And Owner's Manual

MAINTENANCE:

PRECAUTIONS TO BE TAKEN WHEN THE APPLIANCE IS NOT
TO BE USED FOR A PERIOD OF TIME:
Store heater when it has cooled in a zippered bag or other
sealed dust free location between uses.
Always keep the heater area clear and free from
combustible materials, gasoline and other flammable
vapors and liquids.
Keep the vent areas (slots in the bottom and top of the
heater) clear at all times.
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 3.
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. Use the following procedure to inspect the
casing assembly and main burner assembly. 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.
CLEANING INSTRUCTIONS:
1. Allow heater to thoroughly cool before performing any
maintenance.
2. Remove disposable 1 lb.(465g) propane (G31) or
Butane/propane mixture (G30+G31) cartridge from
heater.
3. Remove right side plastic service panel (ref.5) by
removing the six screws holding it in place.
4. Inspect the interior of casing for accumulation of dust,
lint or spider webs. If necessary, clean the interior
of the casing assembly with a vacuum cleaner or
compressed air (max 30 psi). Do not damage any
components within the casing assembly when you are
cleaning.
5. Inspect and clean main burner (ref. 13) and orifice (ref.
3) by using a vacuum or compressed air (max 30 psi).
6. Inspect and clean pilot tube (ref. 14). Insert a doubled
over pipe cleaner into the pilot tube until it bottoms
against the pilot orifice (approximately 2‰/5.08 cm).
Rotate the pipe cleaner a couple of times and remove.
Blow out the remaining debris using compressed air.
WARNING: Never use needles, 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. Apply compressed air (max 30 psi) into the ceramic
8. Reinstall the right side plastic service panel.
TROUBLESHOOTING INFORMATION:
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Mr. Heater MH4BDF Operating Instructions and OwnerÊs Manual
tile of burner assembly and venturi tube (ref. 13) to
remove dust, lint and spider webs.
DIFDL
• Spark electrode broken – replace.
• Igniter wire may not be attached to spark
electrode.-- attach
• Igniter wire damaged – replace.
• Piezo igniter defective – replace gas valve
assembly.
DIFDL
• No gas to heater – re-install or replace gas
cartridge.
• Pilot is blocked from spider web or dirt – clean
pilot, see MAINTENANCE.
DIFDL
• „Pilot/Ignition‰ button not held long enough
to purge air from line.
• Pilot flame not surrounding thermocouple –
clean pilot, see MAINTENANCE.
• Pilot Assembly defective – replace.
•
Tip switch wires disconnected – connect tip
switch (check off switch and off switch wiring).
DIFDL
• Main burner orifice is blocked – clean burner,
see MAINTENANCE.
DIFDL
• Pilot is blocked – clean pilot, see
MAINTENANCE.
• Provide minimum fresh air opening of 4
(10.16cm) square inches (example 2‰ x 2‰
opening/ 5.08 cm x 5.08 cm).
• Tip over switch activated from bumping heater.
Re-light
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