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Mr. Heater | Kerosene Forced Air Heater Operating Instructions and Owner’s Manual
OPERATING INSTRUCTIONS
UNPACKING
1. Remove all protective material which may have been
applied to the heater for shipment.
2. Remove heater from carton.
3. Check the heater for possible shipping damage. If any
damage is found immediately notify the dealer from
whom you purchased the heater.
PREPARING FOR OPERATION
1. Check the heater for possible shipping damage. If any is
found, immediately notify the factory.
2. Follow all of the "Precautions".
3. Fill the fuel tank with clean kerosene, No. 1 fuel oil or
No. 1 diesel fuel only. Kerosene is recommended for
use when the temperature drops below 0°F (-18°C).
In extremely cold weather, condensation may develop
in the tank and it is recommended that a tablespoon of
de-icer be added for each gallon (4 liters) of fuel in the tank.
When filling the heater, use at least 2 gallons (8 liters) of
fuel. Be sure heater is level and do not overfill. Use a funnel
or can with a long fill spout.
IMPORTANT: Before filling fuel tank the first time or after
extended storage periods, drain the fuel tank of any moisture
or condensation.
4. Locate heater at a safe distance from combustible materials.
Model MH50K is not suitable for use on wood floors or other
combustible materials. When used, the heater should rest on
suitable insulating material at least 1 inch think and
extending 3 ft. or more beyond the heater in all directions.
START
1. Plug heater into a well grounded 115V, 60HZ, 1Ø source
of power.
In cold weather, starting may be improved by holding a
finger over the end of the pressure adjusting screw until the
heater starts. This unit is equipped with a circuit breaker
located near the power cord. If the unit does not start, check
to see that the reset button is pressed in.
STOP
1. Unplug the heater.
RESTART AFTER SAFETY SHUTDOWN
1. Wait 5 minutes.
2. Push reset button.
MAINTENANCE AND STORAGE
WARNING: To prevent personal injury, unplug the
heater from the wall outlet before servicing.
For maximum effIciency and trouble-free service, make
the following periodic maintenance, cleaning and
inspections.
DAILY SCHEDULE
1. GENERAL. Make general visual inspection of heater for loose
or damaged parts. Check nuts and bolts to insure against
looseness caused by vibration or rough handling. Damaged
parts should be repaired or replaced before using heater
again. Check heater operation to be sure it is operating
normally (See "Servicing" section for description of normal
operation).
2. FILTERS. Dirty air or fuel filters will cause an imbalance in
the air-fuel mixture. The best indication that this condition
exists is an increase in odors or difficulty getting your heater
to ignite. This heater should never be operated without the
filters in place. If required, clean filters as described under
"500 Hours" and "Annual Schedules".
500 HOUR SCHEDULE
1. AIR INTAKE FILTER. Remove and wash the filter element
with a mild detergent, dry thoroughly and replace. Do not
oil the filter element. If your heater is used where there is
considerable dust or dirt, clean as often as necessary
(approximately every 50hrs.).
2. REMOVE DUST. Clean heater twice a season (more often
under dusty conditions). Remove accumulated dust from
the transformer, burner, motor and fan blades with
compressed air. Wipe area clean with a clean dry cloth.
Inspect area to insure all foreign materials are removed,
especially around the burner and combustion area.
3. CAD CELL. Clean the glass portion of the cad cell with a soft
dry cloth.
4. NOZZLE. Accumulation of dirt from fuel and carbon from
the compressor vanes will eventually fill up the passages in
the nozzle, resulting in reduction of fuel and air flow.
Pressure will gradually increase giving improper fuel-air
mixture and excess odor and smoke. If this occurs, replace
the fuel nozzle.
5. FUEL TANK. Clean twice a season (during frequently used
periods, clean twice a month). Drain and flush the fuel tank
with clean fuel oil.
ANNUAL SCHEDULE
1. AIR OUTPUT FILTER. Remove the air output filter and tap
the contaminated side gently on a solid object to remove
contaminates. Compressed air or liquids should not be used
to clean this filter. Reinstall cleaned filter in filter body in the
same position as it was when removed. If the filter appears
extremely dirty, replace it with a new filter of the same type.
When replacing the filter cover, be sure the gasket is firmly
in place and the screws in the filter cover are tight to
prevent air leaks.
2. FUEL FILTER. Remove the fuel filter from fuel line and direct
compresed air through the filter in the opposite direction of
fuel flow. Safety glasses should be worn when using
compressed air.
3. AIR AND FUEL LINES. If the air or fuel lines are removed
during cleaning, be sure all connections are tight before
operating unit.
4. AIR PRESSURE SETTING. The air pressure has been properly
set at the factory. If the air pressure is out of adjustment, it
will most likely be caused by dirty air filters, a partially
plugged nozzle, an air leak in the system or improperly set
pressure. If adjustment becomes necessary, first determine
the proper pressure setting for your heater which is printed
on the serial label located on the fuel tank. Remove the
plug from the air filter cover and attach an accurate
pressure gauge calibrated to a maximum reading of 15 PSI.
Start the heater and note the pressure reading. If the
pressure is low, slowly turn the pressure adjusting screw in
(Clockwise) until the correct pressure is obtained. If the air
pressure is high, turn the adjusting screw out (counter-
clockwise) until the pressure is correct. When correct
pressure is reached, unplug the heater, remove the guage
and replace the plug.