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Mr. Heater, Inc.| Kerosene Forced Air Heater Operating Instructions and Owner’s Manual
3
Model 50KR 75KTR 125KTR 175KTR 210KTR
Burn Rate: 50,000 Btu/hr (14.7 kW) 75,000 Btu/hr (22 kW) 125,000 Btu/hr (37 kW) 175,000 Btu/hr (51 kW) 210,000 Btu/hr (61.5 kW)
Fuel Rate: 0.37 gal/hr (1.4 L/hr) 0.55 gal/hr (2.1 L/hr) 0.96 gal./hr (3.5 L/hr) 1.3 gal/hr (5.0 L/hr) 1.6 gal/hr (6.0 L/hr)
Electrical Input: 115V, 60Hz, 3.5a 115V, 60Hz, 4a 115V, 60Hz, 5.5a 115V, 60Hz, 5.5a 115V, 60Hz, 5.5a
Line Protection: 10 amps 10 amps 20 amps 20 amps 20 amps
Min. Operating Voltage: 110V 110V 110V 110V 110V
Pressure Setting: 3.5 psig (24 kPa) 4.2 psig (29 kPa) 5.1 psig (38 kPa) 6.8 psig (40 kPa) 8.2 psig (58.6 kPa)
Max. Outlet Temperature: 1450
o
F (787
o
C) 1450
o
F (787
o
C) 1450
o
F (787
o
C) 1450
o
F (787
o
C) 1450
o
F (787
o
C)
Fuel Tank Capacity: 4 gallons (15.1 L) 6 gallons (22.7 L) 8.45 gallons (32 L) 13.5 gallons (51 L) 13.5 gallons (51 L)
Ignition: Direct Spark, Continuous Direct Spark, Continuous Direct Spark, Continuous Direct Spark, Continuous Direct Spark, Continuous
Spark Generator: Igniter 13 kV, 10ma Igniter 13 kV, 10ma Igniter 13 kV, 10ma Igniter 13 kV, 10ma Igniter 13 kV, 10ma
Primary Safety Control: Solid State Control Solid State Control Solid State Control Solid State Control Solid State Control
Certication:
SPECIFICATIONS
OPERATING PRECAUTIONS
This is a kerosene, direct-fired, forced air 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
ventilation could result in death. The symptoms of inadequate
ventilation are:
• headache
• dizziness
• burning eyes and nose
• nausea
• dry mouth or sore throat
Be sure to follow advice about ventilation in the Safety Precau-
tions 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 circum-
vented 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.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 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. For indoor use only. 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. (2.4 m) from the heater outlet and 3 ft. (1.0 m) from
the top, sides and inlet. Locate 10 ft. (3.0 m) 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. Operate only on a stable, level surface. (MH50KR &
MH75KTR – See wood floor warning).
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-prong 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 (For 125,000, 175,000 and 210,000 BTU/hr models
only, see figure 1, page 8.)
Wheels and handles are found in the shipping carton along with
mounting hardware. The wheels, axle and mounting hardware
are in a package. Tools required are a 5/16” nut driver, 3/8” open
or adjustable wrench and standard pliers.
1. Assemble the wheels onto the wheel support as shown.
2. Install one of the cotter pins into the hole on one end of
axle.
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)
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