Mr. Heater MH125KTR Manuale Utente

Mr. Heater, Inc.| Kerosene Forced Air Heater

Operating Instructions and Owner’s Manual

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 50 hrs.).

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.

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 

compressed 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.

Store the heater in a dry location free from fumes or dust.
At the end of each heating season, clean the heater as described 
in the MAINTENANCE section. Drain and flush the fuel tank with 
clean fuel. The manufacturer recommends completely filling the 
tank with fuel for extended storage to minimize condensation 
inside the tank.

A hazardous condition may result if a heater is used that has been 
modified or is not functioning properly. 

When the heater is working normally:
* 

The flame is contained within the heater.

*   The flame is essentially yellow.
* 

There is no strong disagreeable odor, eye burning or other 
physical discomfort.

* 

There is no smoke or soot internal or external to the heater.

* 

There are no unplanned or unexplained shut downs of the 
heater.