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Mr. Heater, Inc.| Kerosene Forced Air Heater

Operating Instructions and Owner’s Manual

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 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.

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 

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.

STORAGE

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.

SERVICING

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.

Summary of Contents for 125KTR

Page 1: ...ed portable heater It uses air oxygen from the area in which it is used Adequate combustion and ventilation air must be provided Refer to page 3 KEROSENE FORCED AIR HEATER UL 733 CSA CAN3 B140 9 3 03...

Page 2: ...D USE OR SERVICE THIS HEATER IF YOU NEED ASSISTANCE OR HEATER INFORMATION SUCH AS AN INSTRUCTIONS MANUAL LABELS ETC CONTACT THE MANUFACTURER WARNING FIRE BURN INHALATION AND EXPLOSION HAZARD KEEP SOLI...

Page 3: ...ns and instructions and of the hazards involved SAFETY PRECAUTIONS 1 Recommended for use with No 1 K kerosene fuel Factory tested for use with No 2 K kerosene No 1 or No 2 Diesel No 1 or No 2 fuel oil...

Page 4: ...ater from power source MH75KTR MH125KTR MH175KTR MH210KTR Push On Off switch to Off position For extended shutdown unplug heater from power source RESTART AFTER SAFETY SHUTDOWN MH50KR MH75KTR MH125KTR...

Page 5: ...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...

Page 6: ...wing troubleshooting guide for unit status and corrective action if necessary SYMPTOM TROUBLE SHOOTING High limit switch Open Circuit 1 Make sure heater is cooled off toggle switch to OFF position wai...

Page 7: ...SET MOTOR CAPACITOR CIRCUIT BOARD 18AWG YELL 18AWG YELL 18AWG RED 18AWG RED 18AWG WHT 18AWG BLK 18AWG GRN 18AWG PURPLE 18AWG PINK 18AWG PINK 1 2 3 4 5 6 18AWG PURPLE THERMOSTAT 18AWG BLUE 7 8 ELECTR0...

Page 8: ...ert 19 26898 26898 26898 26898 Receptacle 110V 20 22104 22104 22104 22104 AC Receptacle Cover 21 26833 26833 26833 26833 26833 Air Pump Cylinder 22 21810 21810 21810 21810 21810 Outlet Housing 23 2181...

Page 9: ...ions and Owner s Manual Kerosene Forced Air Heater Model MH50KR MH75KTR MH125KTR MH175KTR MH210KTR 1 2 3 4 5 6 7 9 10 1 1 13 14 15 16 17 18 19 20 21 24 25 Filter Kit 26 53 28 29 30 31 32 34 35 36 37 3...

Page 10: ...dealer or direct from the factory FOR INFORMATION REGARDING SERVICE Please call Toll Free 800 251 0001 www mrheater com Our office hours are 8 30 AM 5 00 PM EST Monday through Friday Please include t...

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