Mr Heater MH70KTFR Oil Fired Radiant Heater Owner’s Manual

NEVER LEAVE THE HEATER
UNATTENDED WHILE BURNING!
OPERATING ­INSTRUCTIONS ­AND­
OWNER’S­ MANUAL

MH70KTFR Oil Fired Radiant Heater

READ INSTRUCTIONS CAREFULLY: Read and follow all instructions. Place instructions in a safe place for future reference. Do not allow anyone who has not read these instructions to assemble, light, adjust or operate the heater. WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing property damage, personal injury or loss of life.

• Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
• Service must be performed by a qualified service agency.

This is an unvented 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.

WARNING:
YOUR SAFETY IS IMPORTANT TO YOU AND TO OTHERS, SO PLEASE READ THESE INSTRUCTIONS BEFORE YOU OPERATE THIS HEATER.

GENERAL HAZARD WARNING:

FAILURE TO COMPLY WITH THE PRECAUTIONS AND INSTRUCTIONS PROVIDED WITH THIS HEATER, CAN RESULT IN DEATH, SERIOUS BODILY INJURY AND PROPERTY LOSS OR DAMAGE FROM HAZARDS OF FIRE, EXPLOSION, BURN, ASPHYXIATION, CARBON MONOXIDE POISONING, AND/OR ELECTRICAL SHOCK.
ONLY PERSONS WHO CAN UNDERSTAND AND FOLLOW THE INSTRUCTIONS SHOULD USE OR SERVICE THIS HEATER.
IF YOU NEED ASSISTANCE OR HEATER INFORMATION SUCH AS AN INSTRUCTIONS MANUAL, LABELS, ETC.
CONTACT THE MANUFACTURER.
WARNING:
CARBON MONOXIDE CAN KILL YOU
USING A PORTABLE HEATER IN AN ENCLOSED AREA CAN PRODUCE DEADLY CARBON MONOXIDE
WARNING:
NOT FOR HOME OR RECREATIONAL VEHICLE USE
WARNING:
FIRE, BURN, INHALATION, AND EXPLOSION HAZARD. KEEP SOLID COMBUSTIBLES, SUCH AS BUILDING MATERIALS, PAPER OR CARDBOARD, A SAFE DISTANCE AWAY FROM THE HEATER AS RECOMMENDED BY THE INSTRUCTIONS NEVER USE THE HEATER IN SPACES WHICH DO OR MAY CONTAIN VOLATILE OR AIRBORNE COMBUSTIBLES, OR PRODUCTS SUCH AS GASOLINE, SOLVENTS, PAINT THINNER, DUST PARTICLES OR UNKNOWN CHEMICALS.
WARNING:
The State of California requires the following warning:
COMBUSTION BY-PRODUCTS PRODUCED WHEN USING THIS PRODUCT CONTAIN CARBON MONOXIDE, A CHEMICAL KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER AND BIRTH DEFECTS (OR OTHER REPRODUCTIVE HARM).
THIS PRODUCT CONTAINS CHEMICALS KNOWN TO THE STATE OF CALIFORNIA TO CAUSE CANCER AND BIRTH DEFECTS OR OTHER REPRODUCTIVE HARM.

WARNING:

• DO NOT USE GASOLINE, NAPHTHA OR VOLATILE FUELS.
• STOP HEATER BEFORE ADDING FUELS.
• ALWAYS FILL OUTDOORS AWAY FROM OPEN FLAME
• DO NOT USE EXTERNAL FUEL SOURCE.
• DO NOT OPERATE HEATER WHERE FLAMMABLE LIQUIDS OR VAPORS MAY BE PRESENT.
• DO NOT START HEATER WHEN CHAMBER IS HOT
• DO NOT START HEATER WHEN EXCESS FUEL HAS ACCUMULATED IN THE CHAMBER.
• DO NOT PLACE COOKING UTENSILS ON TOP OF THE HEATER.
• PLUG ELECTRICAL CORD INTO A PROPERLY GROUNDED THREE-PRONG RECEPTACLE.

MH70KTFR & MH125KTFR
WARNING:
Not suitable for use on wood floors or other combustible materials. When used the heater should rest on a suitable insulating material at least 1 inch thick and extending 3 feet or more beyond the heater in all directions.

SPECIFICATIONS

CAUTION: CSA certified for use with only No. 1-K kerosene fuel.
Factory Tested: Kerosene, Diesel #1 and #2, Fuel Oil #1 and #2, JP8 (Jet A Fuel)

OPERATING PRECAUTIONS

This is a kerosene, direct-fired, radiant heater. It’s intended use is primarily temporary heating of buildings under construction, alteration or repair.
Direct-Fired means that all of the combustion products enter the heated space. Even though this heater operates very close to 100 percent combustion efficiency, it still produces small amounts of carbon monoxide. Carbon monoxide (called CO) is toxic. CO can
build up in a heated space and failure to provide adequate ventila- tion could result in death. The symptoms of inadequate ventilation are

• Headache
• Dizzness
• Burning eyes and nose
• Nausea
• Dry mouth or sore throat

Be sure to follow advice about ventilation in the Safety Precautions section.
Forced Air means that a blower or fan pushes the air through the heater. Proper combustion depends upon this air flow; therefore, the heater must not be revised, modified or operated with parts removed or missing. Likewise, safety systems must not be circumvented or modified in order to operate the heater.
When the heater is to be operated in the presence of other people the user is responsible for properly acquainting those present with the safety precautions and instructions, and of the hazards involved.

SAFETY PRECAUTIONS

1. Recommended for use with No.1K kerosene fuel. Factory tested for use with No.2-K kerosene, No.1 or No.2 Diesel, No. 1 or No.2 fuel ofl or JP8 Jet A fuel and these fuels may be used as well. Never use gasoline, biodiesel, oil drained from crank cases, naphtha, paint thinners, alcohol or any other highly flammable fuels.

2. Check the heater thoroughly for damage. DO NOT operate a damaged heater.

3. DO NOT modify the heater or operate a heater which has been modified from its original condition.

4. Suitable for outdoor use. For either outdoor or indoor use Where adequate ventilation is provided. Never use in areas normally for habitation. Not for use where exposed to weather.

5. Use in well ventilated areas, provide at least 2 sq. ft. (0.19 sq m.) of opening near the floor and 2 sq. ft. (0.19 sq. m.) near the ceiling directly to outdoors. Increase air openings as marked for each additional heater.

6. Always keep combustibles, like paper and wood at least 8 ft.
   from the heater outlet and 3′ from the top, sides and inlet Locate 8 ft. from canvas or plastic coverings and secure them to prevent flapping movement.

7. Caution: Due to the high surface and exhaust temperatures, adults and children must observe clearances to avoid burns or clothing ignition. Do Not Touch. Keep children, clothing, and combustible away.

8. Install the heater such that it is not directly exposed to water spray, rain and / or water.

9. Never use in areas normally for habitation and /or where children may be present.

10. Always operate only on a stable, level surface.

11. Do not use with duct work. Do not restrict inlet or exit.

12. Use only with electrical power specified. The electrical connection and grounding must comply with National Electrical Code — ANSI/NFPA 70 (USA) and CSA C22.1 Canadian Electrical Code, Part 1 (Canada).

13. Use only a properly grounded 3 pronged receptacle or extension cord.

14. Do not move, handle, or service while hot or in operation.

15. Use only in accordance with local, state (provincial) or national requirements, ordinances and codes.

OPERATING INSTRUCTIONS

UNPACKING

1. Remove heater from carton
2. Remove all protective material which may have been applied to the heater for shipment
3. Check the heater for possible shipping damage. If any damage is found immediately contact the manufacturer at 800-251-0001

ASSEMBLY
Handles and safety guards are found in the shipping carton along with mounting hardware
MH125KTFR

1. Locate the transport handle shipped with your unit. Along with the four Phillips headed screws, nuts, and washers. and install them two sets per side.
2. Locate the radiant surface guard shipped with your unit Next locate the four Phillips headed screws included with the hardware package and attach the guard to the four guard connection points located at approximately the 2 o’clock, 4 o’clock, 10 o’clock, and 8 o’clock positions when looking at the front of your heater. If located in Canada you have an ad- ditional Drape guard to install above the front radiant surface guard. The guard and fasteners are provided.
3. Next install the heat shields. These are attached centered at the 12 o’clock and 6 o’clock positions. The larger one will be installed at the bottom. These are fastened into place using the screws holding the radiant heating surface plate in place Simply loosen only the necessary screws attach the shields and tighten the screws back into place.

MH70KTFR

1. First Locate the hardware package. You will find four long screws for the base tubing, along with 4 nuts and washers.
   Place the heater on the base tubing as shown on the front of this manual or in the parts diagram. Use the long screws and matching fasteners to attach the base to the fuel tank.

2. In the hardware package you will also find two shorter washer headed screws for attaching the handle to the top of the heater. Using a Phillips headed screw driver, attach the handle to the top of the heater as shown on the front of this manual or in the parts diagram .

3. Finally install the lower heat shield. The included heat shield will be located centered at the 6 o’clock position. Only two screws are used to hold the shield in place. The middle hole is only for the locating pin that receives no fastener. Simply remove the screws that line up with the holes on the heat shield when on the centering pin. Put the heat shield into place and re-attach the screws.

MAINTENANCE, STORAGE AND SERVICE

PREPARING FOR OPERATION

1. Check the heater for possible shipping damage. If any is found, immediately contact the manufacturer at 800-251-0001

2. Follow all of the “Precautions”

3. Fill the fuel tank with clean kerosene. 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 ex- tended storage periods, drain the fuel tank of any moisture or condensation.

4. Locate heater at a safe distance from combustible materials.
   Refer to the specifications table in this manual for distances.

HEATER START UP

1. Locate the power plug near the controls of the heater. Using a properly sized and grounded extension cord plug in the unit
2. When power reaches the heater the Red light on the back of the heater will illuminate.
3. Tumn the power switch to the ON position. The LED read out will show the approximate room temperature. When you turn the thermostat knob clockwise the LED readout will change to show the set temperature. When that number is higher than the room temperature the heater will begin is sequence of operation
4. Once the heater begins to run it will cycle on and off based on the thermostat setting. If for any reason your heater does not run properly refer to the Diagnostic and trouble shooting section in this manual or contact the manufacturer with one of the methods listed on the back page of this manual.

HEATER SHUT DOWN

1. To turn off either turn the thermostat knob to a temperature lower than the room temperature or move the power switch to the off position. These heaters are engineered with an integrated 3 minute cooling cycle designed to prolong the life  f internal components and to reduce surface temperatures that tend to increase shortly after shutdown. Please allow this cycle to complete before removing power from the heater.

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 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 filter in place. Contact Mr. Heater for replacement parts

500 HOUR SCHEDULE

1. REMOVE DUST. Clean heater twice a season (more often under dusty conditions). Remove accumulated dust from the 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
2. CAD CELL Clean the glass portion of the cad cell with a soft dry cloth
3. NOZZLE. Accumulation of dirt and carbon from the combustion process can eventually fill up the passages in the nozzle, resulting in reduction of fuel and air flow. If this occurs, replace the fuel nozzle. Contact Mr. Heater for service parts
4. 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. 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
2. FUEL LINES. If the fuel lines are removed during cleaning, be sure all connections are tight before operating unit. If any dry rotting or cracking in the lines is observed replace with 1/4″ id fuel line or contact Mr. Heater for service parts

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 filing 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 s not functioning properly,
When the heater is working normally:

• The flame is contained within the heater.
• There s 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.

TROUBLE SHOOTING

DIAGNOSTIC SAFETY SHUTDOWN AND TROUBLE SHOOTING

supply (is it plugged in?)
Check proper position of the switch (is it on?)
Check fuse/breaker
Wrong setting on thermostat| Check for setting of thermostat higher than room temp.
Defective motor| Replace Motor
Motor starts no ignition or cuts out| Not enough fuel at the burner| Ensure an adequate level of fuel is in the tank.
Cycle unit a few time to allow fuel to fill the filter and fuel system.
Check fuel lines including filter for leaks.
Clean or replace nozzle.
Electronic igniter defective| Check igniter connections including transformer
Check electrodes for corrosion and carbon build up.
Replace transformer
Flame control box defective| Replace flame control box
Photocell defective| Clean or replace photo cell
Solenoid defective| Check connections
Replace solenoid
Motor starts, heater emits smoke| Not enough combustion air| Make sure Air inlet and outlet are free
Clean burner disc
Fuel contaminated or contains water| Drain fuel in tank and replace with clean fuel
Clean or replace fuel filter
Air leaks in fuel circuit| Check fuel lines and system for possible leaks
Not enough fuel at burner| Clean or replace fuel nozzle
Too much fuel at burner| Replace nozzle
Heater does not stop| Solenoid defective| Replace solenoid
LED DIAGNOSTIC READ OUT TABLE
ERROR CODE| DESCRIPTION
E1| Ignition failed or flame out
E2| Temperature sensor malfunction
E3| High limit switch over heat
E4| Flame control malfunction
E5| Solenoid monitor malfunction
E6| Phot cell fault
E7| Motor speed fault
DEFAULT T-STAT SETTING| T-STAT RANGE
68 F| 41 F – 99 F

WIRING DIAGRAM

The parts lists and wiring diagram show the heater as it was constructed. Do not use a heater which is different from that shown. Heater performance is effected by air pressure setting. If there is any uncertainty about the air pressure setting, have it checked.
A heater which is not working right must be repaired, but only by a trained, experienced service person.

PARTS LIST 70K

EXPLODED VIEW MH70KTFR

PARTS LIST 125K

INSTRUCTIONS FOR ORDERING PARTS

OPERATING INSTRUCTIONS AND OWNER’’S MANUAL
Model #
MH7OKTFR
MH125KTFR

PARTS ORDERING INFORMATION:
PURCHASING: Accessories may be purchased at any Mr. Heater local dealer or direct from the factory
FOR INFORMATION REGARDING SERVICE
Please call Toll-Free 800-251-0001
www.mrheater.com
Our office hours are 8:00 AM – 5:00 PM, EST, Monday through Friday.
Please include the model number, date of purchase, and description of problem in all communication.

WARRANTY

LIMITED WARRANTY
Mr. Heater, Inc. warrants its heaters and accessories to be free from defects in material and workmanship for a period of 1 year from date of purchase. Mr. Heater, Inc. will repair or replace this product free of charge if it has been proven to be defective within the 1-year period, and is returned at customer expense with proof of purchase to Mr. Heater, Inc. within the warranty period.
Mr. Heater, Inc. reserves the right to make changes at any time, without notice or obligation, in colors, specifications, accessories, materials and models.

www.mrheater.com 
+800-251-0001
ENERCO GROUP, INC., 4560 W. 160TH ST.,
CLEVELAND, OHIO 44135 + 800-251-0001
Mr. Heater is a registered trademarks of Mr. Heater, Inc
© 2023, Mr. Heater/Mr. Heater.
All rights reserved

References

• Mr. Heater®: Keep Warm. Stay Comfortable.

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