Mi-T-M MH-0060-LM10 User manual

Propane Portable Heater Manual 1
CAUTION
RISK OF INJURY! READ ENTIRE MANUAL BEFORE OPERATING!
THIS MANUAL IS AN IMPORTANT PART OF THE PORTABLE HEATER
AND MUST REMAIN WITH THIS UNIT!
Propane
Portable Heaters
OPERATOR'S MANUAL
MH-0060-LM10
MH-0150-LM10
MH-0150-LMT0
©Copyright 2009, Mi-T-M Corporation® 37-1063-E/F/S-080619
MH-0060-LM10, MH-0150-LM10 : USA & CANADA
MH-0150-LMT0 : USA ONLY
®
C US
247218

2 Propane Portable Heaters Manual
GENERAL HAZARD WARNING: FAILURE TO COMPLY WITH THE PRECAUTIONS AND
INSTRUCTIONS PROVIDED WITH THIS HEATER, CAN RESULT IN DEATH, OR 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, LABEL, ETC. CONTACT THE MANUFACTURER.
WARNING: FIRE, BURN, INHALATION, AND EXPLOSTION 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: NOT FOR HOME OR RECREATIONAL VEHICLE USE.
TABLE OF CONTENTS
INTRODUCTION..............................................................................................................................3
IMPORTANT!. ..................................................................................................................................3
IMPORTANT SAFETY INSTRUCTIONS...................................................................................................4
PORTABLE HEATER FEATURES.............................................................................................................9
PRODUCT FEATURES. ...................................................................................................................9
PROPANE INFORMATION...............................................................................................................9
PORTABLE HEATER SPECIFICATIONS................................................................................................10
GENERAL SAFETY INFORMATION. .....................................................................................................11
IMPORTANT SAFETY INFORMATION...........................................................................................12
OPERATION............................................................................................................................................14
REFILLING THE LP CYLINDER.....................................................................................................14
CHECKING FOR LEAKS. ..............................................................................................................15
VENTILATION. ...............................................................................................................................15
LIGHTING INSTRUCTIONS (MODELS MH-0060-LM10, MH-0150-LM10)...................................15
LIGHTING INSTRUCTIONS (MODELS MH-0150-LMT0). .............................................................15
SHUTDOWN INSTRUCTIONS.......................................................................................................16
TEST FIRING THE HEATER...........................................................................................................16
STORAGE......................................................................................................................................16
MAINTENANCE. .....................................................................................................................................17
MAINTENANCE AND STORAGE...................................................................................................17
TROUBLESHOOTING. ...........................................................................................................................18
STATEMENT OF WARRANTY. ...............................................................................................................19
WARNING: This product can expose you to
chemicals including Lead, which is known to
the State of California to cause cancer and birth
defects or other reproductive harm. For more
information go to www.P65Warnings.ca.gov
WARNING

Propane Portable Heater Manual 3
IMPORTANT!
A "DANGER, WARNING or CAUTION" safety warning will be surrounded by a "SAFETY ALERT BOX". This
box is used to designate and emphasize Safety Warnings that must be followed when operating this heater.
Accompanying the safety warnings are "Signal Words" which designate the degree or level of hazard seri-
ousness. The "Signal Words" used in this manual are as follows:
DANGER: INDICATES AN IMMINENTLY HAZARDOUS SITUATION WHICH, IF NOT AVOIDED, WILL
RESULT IN DEATH OR SERIOUS INJURY.
WARNING: INDICATES A POTENTIALLY HAZARDOUS SITUATION WHICH, IF NOT AVOIDED,
COULD RESULT IN DEATH OR SERIOUS INJURY.
CAUTION: INDICATES A POTENTIALLY HAZARDOUS SITUATION WHICH, IF NOT AVOIDED MAY
RESULT IN MINOR OR MODERATE INJURY OR DAMAGE TO THE HEATER.
The symbols set below are "Safety Alert Symbols". These symbols are used to call attention to items or
procedures that could be dangerous to you or other persons using this equipment.
ALWAYS PROVIDE A COPY OF THIS MANUAL TO ANYONE USING THIS EQUIPMENT. READ ALL
INSTRUCTIONS IN THIS MANUAL AND ANY INSTRUCTIONS SUPPLIED BY MANUFACTURERS
OF SUPPORTING EQUIPMENT BEFORE OPERATING THE PORTABLE HEATER AND ESPECIALLY
POINT OUT THE "SAFETY WARNINGS" TO PREVENT THE POSSIBILITY OF PERSONAL INJURY
TO THE OPERATOR.
INTRODUCTION
Congratulations on the purchase of your new Mi-T-M® Portable Heater! You can be assured your Mi-T-M®
Portable Heater was constructed with the highest level of precision and accuracy. Each component has
been rigorously tested by technicians to ensure the quality, endurance and performance of this heater.
This operator's manual was compiled for your benet. By reading and following the simple safety, installa-
tion and operation, maintenance and troubleshooting steps described in this manual, you will receive years
of troublefree operation from your new Portable Heater. The contents of this manual are based on the latest
product information available at the time of publication. The Manufacturer reserves the right to make chang-
es in price, color, materials equipment, specications or models at any time without notice.
Once the unit has been uncrated, immediately write in the serial number of your unit in the space provided
below.
SERIAL NUMBER ________________________________
Inspect for signs of obvious or concealed freight damage. If damage does exist, le a claim with the trans-
portation company immediately. Be sure that all damaged parts are replaced and that the mechanical and
electrical problems are corrected prior to operation of the unit. If you require service, contact Mi-T-M®Cus-
tomer Service.
Mi-T-M®Corporation, 50 Mi-T-M Drive, Peosta, IA 52068
563-556-7484 / 800-553-9053 / Fax [phone]
Monday - Friday 8:00 a.m. - 5:00 p.m. CST
Please have the following information available for all service calls:
1. Model Number
2. Serial Number
3. Date and Place of Purchase

4 Propane Portable Heaters Manual
Hazard Potential Consequence Prevention
RISK OF ELECTRIC
SHOCK OR
ELECTROCUTION
Serious injury or death could
occur if the portable heater is
not properly grounded. Your
heater is powered by electricity
and may cause electric shock or
electrocution if not used prop-
erly.
Electrical shock may occur if
portable heater is not operated
properly.
Serious injury or death may
occur if electrical repairs are at-
tempted by unqualied persons.
Serious injury could occur from
touching exposed metal parts.
These areas can remain hot for
some time after the heater is
turned off.
IMPORTANT SAFETY INSTRUCTIONS
Installation of this unit, including
all electrical connections, must
comply with all local, state and
national codes.
This product must be grounded.
Connect to a GFCI circuit breaker
when available. If the unit should
malfunction or breakdown,
grounding provides a path of least
resistance for electric current to re-
duce the risk of electric shock. Do
not ground to a gas supply line.
Improper connection of the
equipment-grounding conductor
can result in a risk of electrocu-
tion. Check with a qualied elec-
trician or service personnel if you
are in doubt as to whether the
system is properly grounded.
Always be certain the unit is re-
ceiving proper voltage. Specied
on the model plate of the heater.
Use only a three-prong, grunded
outlet and extension cord.
Keep all connections dry and
install the heater so that it is not
directly exposed to water spray,
rain, dripping water or wind.
Any electrical wiring or repairs
performed on this heater should
be done by Authorized Service
Personnel in accordance with Na-
tional and Local electrical codes.
Always unplug the heater when
not in use.
Never allow any part of your body
or other materials to make con-
tact with any exposed metal parts
on the heater.
READ ALL SAFETY WARNINGS BEFORE USING PORTABLE HEATER
RISK OF BURNS
NEVER LEAVE HEATER UNATTENDED WHILE BURNING, CONNECTED TO A POWER SOURCE,
OR WHILE CONNECTED TO A FUEL SOURCE

Propane Portable Heater Manual 5
Hazard Potential Consequence Prevention
RISK OF EXPLOSION OR
FIRE
Serious injury or death may
occur from normal electrical
sparks in motor and pressure
switch
Serious injury may occur if
the heater air inlet or outlet is
blocked.
Serious injury or death may oc-
cur if improper fuels are used.
Serious injury may occur if
heater is not placed on level
surface.
Always operate heater in a well
ventilated area free of ammable
vapors, combustible dust, gases
or other combustible materials.
Never place objects in front of air
inlet (rear) or air outlet (front) of
heater. Never use duct work in
front or at rear of heater. Keep all
combustible material away from
this heater.
The propane (LP) gas pressure
regulator and hose assembly
supplied with the heater must be
used without alteration
This heater is EXTREMELY HOT
while in operation.
Bulk fuel storage should be a
minimum of 25 ft. from heaters,
torches, portable generators, or
other sources of ignition. All fuel
storage should be in accordance
with federal, state, or local au-
thorities having jurisdiction.
Never move or handle heater
while still hot.
If equipped with a thermostat,
the heater may start at any time.
Always locate heater on a stable
and level surface.
Always keep away from children
and animals.
IMPORTANT SAFETY INSTRUCTIONS
NEVER LEAVE HEATER UNATTENDED WHILE BURNING, CONNECTED TO A POWER SOURCE,
OR WHILE CONNECTED TO A FUEL SOURCE

6 Propane Portable Heaters Manual
Hazard Potential Consequence Prevention
IMPORTANT SAFETY INSTRUCTIONS
RISK TO BREATHING Serious injury or death could
occur from failure to provide
proper ventilation according to
this manual.
This is a direct-red, forced heat-
er. It is primarily intended for use
for temporary heating of build-
ings under construction,alteration
or repair. Direct-red means that
all of the combustion products
of the heater enter the heated
space. This appliance does pro-
duce small amounts of carbon
monoxide. Carbon monoxide is
toxic. Humans can tolerate small
amounts of carbon monoxide,
and precautions should be taken
to provide proper ventilation.
Early signs of carbon monox-
ide poisoning resemble the u.
Symptoms of improper ventila-
tion are: * headache * dizziness
* burning of the nose and eyes *
nausea * dry mouth * sore throat
Use this heater only in well ven-
tilated areas! Provide at least a
three square foot (2,800 sq cm)
opening of outside air for every
100,000 BTU/hr of heater rating.
People with breathing problems
should consult a physician before
using the heater.
Carbon Monoxide Poisoning:
Early signs of carbon monox-
ide poisoning resemble u-like
symptoms such as headaches,
dizziness, and/or nausea. If you
have these symptoms, your heat-
ermay not be working properly.
Get fresh air at once! Have the
heater serviced. Some people are
more affected by carbon mon-
oxide than others. These include
pregnant women, those with
heart or lung problems,anemia,
or those under the inuence of
alcohol, or at high altitudes.
Never use this heater in living or
sleeping areas.
This is an unvented portable
heater. It uses air (oxygen) from
the area which it is used. Ample
combustion and ventilation must
be provided.
NEVER LEAVE HEATER UNATTENDED WHILE BURNING, CONNECTED TO A POWER SOURCE,
OR WHILE CONNECTED TO A FUEL SOURCE

Propane Portable Heater Manual 7
IMPORTANT SAFETY INSTRUCTIONS
! SAVE THESE INSTRUCTIONS !
FIRE, BURN, INHALATION, AND EXPLOSION HAZARD. KEEP COMBUSTIBLES, SUCH AS
BUILDING MATERIALS, PAPER OR CARDBOARD, A SAFE DISTANCE AWAY FROM THE
HEATER AS RECOMMENDED BY THESE INSTRUCTIONS. NEVER USE THE HEATER IN
SPACES WHICH CONTAIN PRODUCTS SUCH AS GASOLINE, SOLVENTS, PAINT THINNERS,
DUST PARTICLES, VOLATILE OR AIRBORNE COMBUSTIBLES, OR ANY UNKNOWN
CHEMICALS. 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 VENTILATION.
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.
AN LP CYLINDER NOT CONNECTED FOR USE SHALL NOT BE STORED IN THE VICINITY OF
THIS OR ANY OTHER APPLIANCE.
WHAT TO DO IF THE SMELL OF GAS IS PRESENT:
DO NOT attempt to light heater
Extinguish any open ame
Shut off gas to heater
If odor continues, contact your local gas supplier or re department.
Do not touch any electric switch, do not use any phone in your building
Immediately call your gas supplier from a neighbors phone. Follow the gas suppliers instructions
If you can not reach your gas supplier, call the re department
Service must be done by a qualied service agency or the gas supplier.
CALIFORNIA RESIDENTS: 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).
DO NOT OPERATE THIS HEATER UNTIL YOU HAVE READ, AND THOROUGHLY UNDERSTAND
THESE SAFETY AND OPERATING INSTRUCTION. FAILURE TO COMPLY WITH THE
PRECAUTIONS AND INSTRUCTIONS PROVIDED WITH THIS HEATER CAN RESULT IN DEATH,
SERIOUS BODILY INJURY, PROPERTY LOSS OR DAMAGE FROM THE HAZARDS OF FIRE,
EXPLOSION, BURNS, ASPHYXIATION OR CARBON MONOXIDE POISONING. ONLY PERSONS
WHO CAN READ AND UNDERSTAND THESE INSTRUCTIONS SHOULD USE OR SERVICE THIS
HEATER.
NEVER LEAVE HEATER UNATTENDED WHILE BURNING, CONNECTED TO A POWER SOURCE,
OR WHILE CONNECTED TO A FUEL SOURCE

8 Propane Portable Heaters Manual
WARNING
THE FOLLOWING PAGES CONTAIN OPERATING AND
MAINTENANCE INSTRUCTIONS.
DO NOT ATTEMPT TO OPERATE THIS PORTABLE HEATER
UNTIL YOU HAVE READ AND UNDERSTOOD ALL SAFETY
PRECAUTIONS AND INSTRUCTIONS LISTED IN THIS MANUAL.
INCORRECT OPERATION OF THIS UNIT CAN CAUSE SERIOUS
INJURY!!
DO NOT ALTER OR MODIFY THIS EQUIPMENT
IN ANY MANNER!
NEVER LEAVE HEATER UNATTENDED WHILE BURNING OR
WHILE CONNECTED TO A FUEL SOURCE

Propane Portable Heater Manual 9
PORTABLE HEATER FEATURES
PRODUCT FEATURES
• Portable, stable and fully assembled.
• Wind resistant and rain protected.
• Continuous spark ignition or piezo spark ignition.
• 100% safety shut-off system.
• Adjustable input ratings.
• Adjustable Height Controller.
PROPANE INFORMATION
The Propane (LP) cylinder must also be equipped with the following:
• A collar to protect the gas valve.
• A shut-off valve terminating a LP cylinder valve outlet as specied in the American National Standard
for Compressed Gas Cylinder Valve Outlets and Inlet Connections.
• A safety relief valve having direct communications with the vapor space of the LP cylinder.
• An arrangement of vapor withdrawal.
Gas Valve Knob
Base
Height Controller
Guard
Inner Shell
Outer Shell
Model Shown: MH-0150-LM10
NEVER LEAVE HEATER UNATTENDED WHILE BURNING, CONNECTED TO A POWER SOURCE,
OR WHILE CONNECTED TO A FUEL SOURCE

10 Propane Portable Heaters Manual
PORTABLE HEATER SPECIFICATIONS
Model MH-0060-LM10 MH-0150-LM10 MH-0150-LMT0
Rating BTU/Hr 40-50-60,000 120,000-150,000 150,000
Fuel Comsumption
Lbs/Hr
1.9 / 2.3 / 2.8 lbs per hr 5.5 / 6.2 / 6.9 lbs per hr 6.9 lbs per hr
Electrical Input 120V, 60 Hz 120V, 60 Hz 120V, 60 Hz
Manifold Pressure 11" W.C. 8.3" W.C. 8.3" W.C.
Amps 0.6 1.02 1.02
Size (L x W x H) 18.1" x 7.1" x 13.0" 25.1" x 8.7" x 15.4" 25.1" x 8.7" x 15.4"
Net Weight (Lbs) 11.2 17.6 19.8
NEVER LEAVE HEATER UNATTENDED WHILE BURNING, CONNECTED TO A POWER SOURCE,
OR WHILE CONNECTED TO A FUEL SOURCE

Propane Portable Heater Manual 11
WARNING: IMPROPER USE OF THIS HEATER CAN RESULT IN SERIOUS INJURY OR DEATH FROM
BURNS, FIRE, EXPLOSION, ELECTRICAL SHOCK AND /OR CARBON MONOXIDE POISONING.
This heater is designed and approved for use as a construction heater in accordance with the standard
for Gas-Fired Construction Heaters ANS Z83.7 * CSA 2.14-2017. CHECK WITH YOUR LOCAL FIRE
SAFETY AUTHORITY IF YOU HAVE ANY QUESTIONS ABOUT APPLICATIONS. Other standards govern
the use of fuel gasses and heating products for specic uses. Your local authority can advise you about
these.
WARNING: NOT FOR USE WITH DUCTWORK.
WARNING: NOT FOR HOME OR RECREATIONAL VEHICLE USE. THE HOSE ASSEMBLY SHALL BE
PROTECTED FROM TRAFFIC, BUILDING MATERIAL AND CONTACT WITH HOT SURFACES
BOTH DURING USE AND WHILE IN STORAGE.
IMPORTANT: Read this User's Manual carefully and completely before attempting to operate or service this
heater. Improper use of the heater can cause serious injury or death from re, explosion and carbon monox-
ide poisoning.
Every possible circumstance that may involve a hazard cannot be anticipated. The warnings in this manual
and attached to the unit are therefore not all-inclusive. If a procedure, work method or operating technique
not specically recommended by the manufacturer is used, you must be sure it is safe for you and others.
You should also insure that equipment will not be damaged or made unsafe by the operating or maintenance
method you choose. CHECK WITH YOUR LOCAL FIRE SAFETY AUTHORITY IF YOU HAVE ANY QUES-
TIONS ABOUT APPLICATIONS.
Other standards govern the use of fuel gases and heat producing products in specic applications. Your lo-
cal authority can advise you of these.You must provide the propane gas and cylinder(s). Use this heater only
with a propane vapor withdrawal supply system. Refer to Chapter 5 of the Standard for Storage and Han-
dling of Liqueed Petroleum Gas , ANSI/NFPA 58. Your local library or re department will have this booklet.
WARNING: AIR QUALITY HAZARD
• Do not use this heater for heating human living quarters
• Use of direct-red heaters in the construction environment can result in exposure to levels of CO,
CO2, and NO2considered to be hazardous to health and potentially life threatening
• Do not use in unventilated areas
• Know the signs of CO and CO2poisoning • Headaches, stinging eyes • Dizziness, disorientation •
Difculty breathing, feels of being suffocated
• Proper ventilation air exchange (OSHA 29 CFR 1926.57) to support combustions and maintain ac-
ceptable air quality shall be provided in accordance with OSHA 29 CFR Part 1926.154, ANSI A10.10
Safety Requirements for Temporary and Portable Space Heating Devices and Equipment used in the
Construction Industry or the Natural Gas and Propane Installation Codes CSA B149.1
• Periodically monitor levels of CO, CO2and NO2existing at the construction site – at the minimum at
the start of the shift and after 4 hours.
• Provide ventilation air exchange, either natural or mechanical, as required to maintain acceptable
indoor air quality
• Ensure that the ow of combustion and ventilation air exchanges cannot become obstructed
• As the building “tightens up” during the construction phase ventilation may need to be increased
GENERAL SAFETY INFORMATION
NEVER LEAVE HEATER UNATTENDED WHILE BURNING, CONNECTED TO A POWER SOURCE,
OR WHILE CONNECTED TO A FUEL SOURCE

12 Propane Portable Heaters Manual
GENERAL SAFETY INFORMATION
USA 8-Hr Time weighted average (OSHA 29 CFR 1926.55 App A)
USA – Ceiling Limit (Short Term Exposure Limit = 15 minutes)
Canada 8-hr time weighted average WorkSafe BC OHS Guidelines Part 5.1 and Ontario Work¬places Reg
833
Canada STEL (15 minutes Reg 833/1 hour WSBC) WorkSafe BC OHS Guidelines Part 5.1 and Ontario Work-
places Reg 833
Note: Installation of this appliance at altitudes above 2000 ft (610 m) shall be in accordance with local codes, or in the ab-
sence of local codes, the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or National Standard of Canada, Natural Gas and
Propane Installation Code, CSA B149.1.
IMPORTANT SAFETY INFORMATION
1. Children should be kept away.
2. Always maintain proper clearance from combustible materials.
3. Minimum clearance should be: Sides - 24” Top - 36” Front - 72”
4. Heater must be placed on level and solid footing.
5. Never place anything, including clothes or other ammable items on heater.
6. Do not modify heater, or operate a heater that has been modied.
7. Adequate clearance for accessibility, combustion and ventilation (air supply) must be maintained at all times
when heater is operating.
8. Service and repair should be performed by a qualied service person. The heater should be inspected
before each use, and at least annually by a qualied person. More frequent cleaning may be required as
necessary. Do not service heater while hot or operating.
9. Never connect heater to an unregulated gas supply.
10. Use only the electrical/power cord specied. Electrical and grounding connection must comply with National
Electrical Code - ANSI/NFPA 70 (USA) and CSA C22.1 Canadian Electrical Code, Part 1 (Canada).
11. To prevent injury, always wear gloves when handling heater. Never handle an operating or hot heater, as
severe burns may result.
NEVER LEAVE HEATER UNATTENDED WHILE BURNING, CONNECTED TO A POWER SOURCE,
OR WHILE CONNECTED TO A FUEL SOURCE
CO 50 ppm
CO25000 ppm
NO2
CO
CO2
NO25 ppm
CO 25 ppm
CO25000 ppm
NO23 ppm (Reg 833)
CO 100 ppm
CO215,000 ppm (WSCB)
30,000 ppm (Reg 833)
NO21.0 ppm (WorkSafeBC)
5.0 ppm (Reg 833)

Propane Portable Heater Manual 13
GENERAL SAFETY INFORMATION
12. Use heater in accordance with all local codes. In the absence of local codes, refer to The National Fuel
Code, ANSI Z223.1
13. This heater is shipped from the factory for use with LP (propane) gas only. Do not convert to any other
gas. Installation must conform to local codes, or in their absence, with the standard for the Storage and
Handling of Liqueed Petroleum Gases ANSI/NFPA 58.
14. Use only the regulator and hose assembly provided with this heater. Inspect the regulator/hose assembly
prior to each use of the heater. If there is excessive abrasion or wear, or if the hose is cut, replace it with
the proper assembly shown in the parts list, prior to using the heater.
15. Gas supply connections should be checked by using a 50/50 soap and water solution. Never use a ame
to check for gas leaks.
16. Locate LP cylinder at least 6 feet from the heater, and do not direct heater discharge towards the LP cylinder
unless it is at least 20 feet from the heater.
17. The electrical connection and grounding must comply with the National Electrical Code, ANSI/NFPA 70.
Use only a properly grounded three (3) prong receptacle.
18. Do not restrict air inlet or outlet areas of the heater.
NEVER LEAVE HEATER UNATTENDED WHILE BURNING, CONNECTED TO A POWER SOURCE,
OR WHILE CONNECTED TO A FUEL SOURCE

14 Propane Portable Heaters Manual
OPERATION
REFILLING THE LP CYLINDER
ALL NEW LP CYLINDERS MUST BE PURGED BEFORE THE FIRST FILLING.
WARNING: PURGING AND FILLING OF LP CYLINDERS MUST BE PERFORMED BY PERSONNEL
WHO HAVE BEEN THOROUGHLY TRAINED IN ACCEPTED LP GAS INDUSTRY PROCEDURES.
FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN EXPLOSION, FIRE, SEVERE
PERSONAL INJURY OR DEATH.
1. Turn heater gas valve knob and LP cylinder valve to OFF position.
2. LP cylinder valve equipped with old style tting has LEFTHANDED THREADS. Turn tting CLOCKWISE to
loosen. Protect this tting when disconnected from LP cylinder.
3. Have your LP cylinder lled by your local Propane gas supplier.
4. Some LP cylinders have a bleed-off valve. This valve should be inspected for leaks after each lling of the
LP cylinder. Turn the valve clockwise to close.
5. Fasten full Propane tank and connect proper tting to LP cylinder valve by turning COUNTERCLOCKWISE.
6. With heater gas valve knob still in OFF position, turn ON LP cylinder valve and check for leaks with soap
solution.
CAUTION: PROPANE IS SAFE TO USE WHEN PROPERLY HANDLED. CARELESS HANDLING OF
THE LP CYLINDER COULD RESULT IN A FIRE AND/OR AN EXPLOSION. THEREFORE:
7. Always keep LP cylinder securely fastened and in an upright position.
8. Avoid tipping the LP cylinder on its side when connected to
a regulator, since this may cause damage to the diaphragm
in the regulator.
9. Handle valves with care.
10. Never connect an unregulated LP cylinder to a construction
heater.
11. Do not subject LP cylinder to excessive heat.
12. Tightly close the gas shutoff valve on the LP cylinder after
each use.
13. All ttings must be protected when disconnected from the
LP cylinder.
14. Never store an LP cylinder inside a building or in the vicinity
of any gas burning appliance.
CAUTION: THE DISCONNECTED TANK MUST NEVER
BE STORED IN A BUILDING, GARAGE OR ANY
OTHER ENCLOSED AREA.
15. Do not restrict inlet or outlet of heater. Heater is never to be used with ductwork.
Average Temp. (°F) MH-0060-LM10
20 or 100 lb cylinder MH-150-LM10 100 lb. cylinder MH-150-LMT0 100 lb. cylinder
32° 1 2 2
20° 1 2 2
10° 1 3 3
0° 1 3 3
-10° 2 Use larger tank Use larger tank
-20° 2 Use larger tank Use larger tank
Hose
Regulator
Supply Valve
Propane
Tank
NEVER LEAVE HEATER UNATTENDED WHILE BURNING, CONNECTED TO A POWER SOURCE,
OR WHILE CONNECTED TO A FUEL SOURCE

Propane Portable Heater Manual 15
CHECKING FOR LEAKS
To check for leaks, make up a 50/50 solution of dish soap and water. Apply this solution to all gas con-
nections. If bubbles appear, there is a leak. If a leak is found, turn off the gas supply, and re-connect the
leaking connection. If the leak persists after several tries, contact Mi-T-M Customer Service at 800-553-
9053.
The installation of this heater must meet all local codes and/or gas utility requirements. In the absence of
local codes, the National Fuel Code ANSI Z223.1 should be followed.
The minimum clearances to any combustible construction materials must be maintained at all times.
VENTILATION
Always provide a fresh air opening in the heated space of at least three square feet (2,800 sq. cm.) for
each 100,000 BTU/Hr of heater output. For example, a MH-0150-LM10 will require:
a two-car garage door open 6 inches, or
a single car garage open 9 inches, or
two thirty two inch wide windows open 15 inches.
LIGHTING INSTRUCTIONS (MODELS MH-0060-LM10, MH-0150-LM10)
1. Connect power cord to a properly grounded three (3) prong 120V, 60 Hz, extension cord.
EXTENSION CORD WIRE REQUIREMENTS:
6 to 10 feet (1.8 to 3 meters) long, use 18 AWG conductor.
11 to 100 feet (3.4 to 30.53 meters) long, use 16 AWG conductor.
101 to 200 feet (30.8 to 61 meters) long, use 14 AWG conductor.
2. Connect heater to a proper LP cylinder.
3. Turn gas valve clockwise to OFF position.
4. Wait ve (5) minutes for any gas to clear. Smell for gas; if you do not smell gas, go to Step 5.
5. Push in and turn gas control knob counterclockwise to LOW/IGN position. This will light the burner. If
needed, keep pressing control knob until the burner lights.
6. Keep the valve knob depressed for at least 30 seconds after lighting the burner. After 30 seconds, release
valve knob.
7. If burner does not stay lit, repeat lighting procedure.
8. When burner stays lit, turn gas valve knob counterclockwise to desired setting.
LIGHTING INSTRUCTIONS (MODELS MH-0150-LMT0)
The theory of operation for the 150T thermostat is the incoming power is controlled by the thermostat, which
uses a resistance temperature detector (RTD ) to open and close a circuit to shut off the incoming power to
the circuit board. The circuit board controls a solenoid valve to control the gas ow to the nozzle and power
to the fan. [This is possible for this heater because it does not use a thermocouple to rectify ame presence.
Flame presence is rectied through the igniter.
1. Follow all safety, installation and ventilation instructions in this manual.
2. Position the heater on a stable and level surface, and be sure that no drafts blow into the inlet or outlet of
the heater.
3. Plug the power cord of the heater into a three hole grounded extension cord. Be sure that the extension
cord is at least 6 feet long, and is UL listed.
Up to 50 feet long, use 18 AWG rated cord.
OPERATION
NEVER LEAVE HEATER UNATTENDED WHILE BURNING, CONNECTED TO A POWER SOURCE,
OR WHILE CONNECTED TO A FUEL SOURCE

16 Propane Portable Heaters Manual
51 to 100 feet long, use 16 AWG rated cord.
101 to 200 feet long, use 14 AWG rated cord.
4. Following the extension cord requirements, plug the extension cord into a 120 volt/60 herts, three hole
grounded outlet.
5. Open gas supply valve slowly.
6. Rotate on/off switch to the ON position. Set thermostat to desired temperature. Thermostat setting may
be too low if heater does not start. Select a highter temperature and start heater.
SHUTDOWN INSTRUCTIONS
To shut off heater:
1. Turn gas valve knob clockwise to OFF position.
2. Turn gas supply OFF by turning LP cylinder valve clockwise to close.
3. Disconnect the power cord.
TEST FIRING THE HEATER
Test re your construction heater following the lighting instructions applicable to the gas control system
employed.
Leak test all gas connections with 50/50 soap and water solution prior to start-up. Soap bubbles indi-
cate a gas leak. DO NOT use a match or ame to test for gas leaks.
NOTE: Heater surface temperature must be cold before initiating service, cleaning or storage.
STORAGE
Always disconnect the heater from the LP cylinder before putting the heater into storage. If for any
reason the heater is to be stored indoors, the tank MUST be disconnected from the LP cylinder, and the
cylinder stored outdoors in a well-ventilated area, out of the reach of children, and in accordance with
the Standard for Storage and Handling of Liqueed Gases, ANSI/NFPA 58 - latest edition. The plastic
valve plug or valve cover supplied with the cylinder must be re-installed on the valve to protect the tting
from damage.
WARNING: NEVER STORE AN LP CYLINDER INSIDE OF A BUILDING, OR NEAR ANY OTHER GAS
OR OIL BURNING APPLIANCES.
NOTE: Installation and repair of this heater should be done by a qualied service person.
OPERATION
NEVER LEAVE HEATER UNATTENDED WHILE BURNING, CONNECTED TO A POWER SOURCE,
OR WHILE CONNECTED TO A FUEL SOURCE

Propane Portable Heater Manual 17
MAINTENANCE AND STORAGE
Inspect your heater before each use. Check all connections for leaks, following the procedure outlined in
this manual. Check the Regulator Hose for any cracks, breaks or wear. If the hose is damaged replace it
with the correct manufacturers part.
After use, always disconnect the heater from the cylinder, and store the heater separately from the tank.
Be sure to close the tank valve after use, and before storage.
Always store the propane cylinder outdoors, but not in an enclosed area. Never store the cylinder near
high heat, direct sunlight or open ames. Never store the cylinder indoors. The cylinder should be stored
outdoors in accordance with chapter 5 of the Standard for Storage and Handling of Liqueed Petroleum
Gasses (ANSI/INFPA 58).
Always keep your heater clean, inside and out.
Have heater inspected anually by a qualied service technician.
Place the plastic covers over the ttings the heater was supplied with when putting heater away for the
season.
Always store the heater in a clean, dry and safe place.
MAINTENANCE
NEVER LEAVE HEATER UNATTENDED WHILE BURNING, CONNECTED TO A POWER SOURCE,
OR WHILE CONNECTED TO A FUEL SOURCE
MH-0060-LM10, MH-0150-LM10
MH-0150-LMT0

18 Propane Portable Heaters Manual
TROUBLESHOOTING
SYMPTOM
Fan does not turn when electricity
is connected
Heater will not re (ignite)
Heater stops running by itself
PROBABLE CAUSE
1. No electric power to heater
2. Blades of fan in contact with
heater housing
3. Fan blades bent
4. Fan motor defective
1. No spark at module
2. Incorrect spark gap
3. Corroded electrode
1. Temperature inside heater is
too high, causing thermal switch
to shut down operation
2. Damaged control valve
3. Dust or debris accumulated in
heater
REMEDY
1. Check current at outlet. If volt-
age is correct, inspect extension
and power cords for cuts, frays or
breaks
2. Check housing for damage. Be
sure there ar no dents in the hous-
ing obstructing the fan
3. Straighten all fan blades
4. Replace Motor Assembly
1. Inspect module wire. Re-attach,
or tighten if loose. Inspect Spark
module, and replace if necessary.
Inspect all other electrical compo-
nents
2. Set plug gap to 0.16” (4mm)
3. Replace spark plug (Multi-
Bracket Assembly)
1. If heater input or output is
restricted, the inside temperature
can become too hot. Keep the
areas in front and behind heater
clear of obstructions
2. Replace control valve (Valve
Assembly)
3. Clean inside of heater
NEVER LEAVE HEATER UNATTENDED WHILE BURNING, CONNECTED TO A POWER SOURCE,
OR WHILE CONNECTED TO A FUEL SOURCE

Propane Portable Heater Manual 19
STATEMENT OF WARRANTY
Mi-T-M warrants this heater to the original retail purchaser only, to be free from defects in material and
workmanship for a period of
one (1) year from the date of initial purchase.
This product must be properly installed, maintained and operated in accordance with the instructions
provided. Mi-T-M requires reasonable proof of your date of purchase from an authorized retailer or dis-
tributor. Therefore, you should keep your sales slip, invoice, or cancelled check from the original pur-
chase.
EXCLUSIONS
1. This Limited Warranty shall be limited to the repair or replacement of parts, which prove defective Mi-
T-M shall determine at its reasonable discretion. This warranty does not include wear items: lters, vanes,
nozzles, and rotors.
2. This Limited Warranty does not cover any failures or operating difculties due to normal wear and tear,
accident, abuse, misuse, alteration, misapplication, improper installation or improper maintenance and
service by you or any third party. Failure to perform normal and routine maintenance on the heater, shipping
damage, damage related to insects, birds, or animals of any kind, and damage due to weather conditions
are also not covered.
3. In addition, the Limited Warranty does not cover damage to the nish, such as scratches, dents,
discoloration, rust or other weather damage, after purchase.
All transportation costs for the return of the damaged product or parts will be the responsibility of the
purchaser. Upon receipt of damaged item, Mi-T-M will examine the item and determine if defective. Mi-
T-M will repair or replace and return the item, freight pre-paid. If Mi-T-M nds the item to be in normal
operating condition, or not defective, the item will be returned freight collect.
This Limited Warranty is in lieu of all other express warranties. Mi-T-M disclaims all warranties for prod-
ucts that are purchased from sellers other than authorized retailers or distributors.
AFTER THE PERIOD OF THE ONE (1) YEAR EXPRESS WARRANTY EXPIRES, Mi-T-M DISCLAIMS ANY
AND ALL IMPLIED WARRANTIES, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR APPLICATION. FURTHER, Mi-T-M SHALL
HAVE NO LIABILITY WHATSOEVER TO PURCHASER OR ANY THIRD PARTY FOR ANY SPECIAL, INDI-
RECT, PUNITIVE, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
Mi-T-M assumes no responsibility for any defects caused by third parties. This Limited Warranty gives
the purchaser specic legal rights; a purchaser may have other rights depending upon where he or she
lives. Some states do not allow the exclusion or limitation of special, incidental or consequential damag-
es, or limitations on how long a warranty lasts, so the above exclusion and limitations may not apply to
you. Mi-T-M does not authorize any person or company to assume for it any other obligation or liability in
connection with the sale, installation, use, removal, return, or replacement of its equipment, and no such
representations are binding on Mi-T-M. Always be sure to specify model number and serial number when
making any claim with Mi-T-M.
For Service or Warranty Consideration, contact
Mi-T-M® Corporation, 50 Mi-T-M Drive, Peosta, IA 52068
563-556-7484 / 800-553-9053 / Fax [phone]
Monday - Friday 8:00 a.m. - 5:00 p.m. CST

20 Propane Portable Heaters Manual
AVERTISSEMENT: Ce produit peut vous
exposer à des produits chimiques, tel que le
plomb, qui est reconnu par l’état de la Californie
comme étant une cause de cancer, d'anomalies
congénitales et d'autres problèmes liés à la
reproduction. Pour plus de renseignements,
aller à www.P65Warnings.ca.gov
AVERTISSEMENT
TABLE OF CONTENTS
IMPORTANT!...........................................................................................................................................21
IMPORTANTES CONSIGNES DE SECURITE. ...................................................................................22
!GARDER CES INSTRUCTIONS!...........................................................................................................25
CARACTÉRISTIQUES. ...........................................................................................................................27
CARACTÉRISTIQUES DU PRODUIT. ............................................................................................27
INFORMATIONS SUR LE PROPANE.............................................................................................27
SPÉCIFICATIONS. ..................................................................................................................................28
INFORMATIONS GÉNÉRALES SUR LA SÉCURITÉ.............................................................................29
INFORMATIONS IMPORTANTES SUR LA SÉCURITÉ. .................................................................30
FONCTIONNEMENT...............................................................................................................................32
REMPLISSAGE DU RÉSERVOIR DE GAZ PROPANE...................................................................32
VÉRIFICATION DES FUITES..........................................................................................................33
VENTILATION. ...............................................................................................................................33
INSTRUCTIONS POUR L’ALLUMAGE (MH-0060-LM10, MH-0150-LM10). .................................33
INSTRUCTIONS POUR L’ALLUMAGE (MH-0150-LMT0)..............................................................33
INSTRUCTIONS POUR L’ARRÊT. .................................................................................................34
VÉRIFICATION DE LA MISE EN FEU DU RADIATEUR..................................................................34
ENTREPOSAGE. ...........................................................................................................................34
ENTRETIEN.............................................................................................................................................35
ENTRETIEN ET ENTREPOSAGE...................................................................................................35
DÉPANNAGE. .........................................................................................................................................36