Mr. Heater MH80CVX, MH25CVX, MH200CVX Owner's Manual
Model #
OPERATING INSTRUCTIONS
AND OWNER’S MANUAL
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.
MH25CVX
MH80CVX
MH200CVX
CONVECTION
CONSTRUCTION HEATER
If the information in this manual is not followed exactly, a fire or explosion
WARNING:
— 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 YOU SMELL GAS
• Do not try to light appliance.
• Extinguish any open flame.
• Shut off gas to appliance.
— Service must be performed by a qualified service agency.
This is an unvented gas-fired 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.
may result causing property damage, personal injury or loss of life.
70486 - 2018 - CB MR. HEATER, INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 • 800-251-0001
WARNING:
YOUR SAFETY IS IMPORTANT TO YOU AND TO OTH-
ERS, 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:
NOT FOR HOME OR RECREATIONAL VEHICLE USE
TABLE OF CONTENTS
HEATER SPECIFICATIONS ........................................................... 2
WARNINGS ................................................................................ 2
OPERATING PRECAUTIONS ........................................................ 3
SAFETY PRECAUTIONS .............................................................. 3
ODOR FADE WARNING ............................................................. 4
CAUTION: SHELL EXTENSION INSTRUCTIONS. ........................... 5
OPERATING INSTRUCTIONS ....................................................... 6
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.
THE STATE OF CALIFORNIA REQUIRES THE
FOLLOWING WARNING:
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.
SERVICING ................................................................................. 6
SIZE AND CAPACITY OF PROPANE CYLINDERS REQUIRED ......... 7
200CVX - PARTS ........................................................................ 8
80CVX- PARTS ........................................................................... 9
25CVX- PARTS ........................................................................... 9
WARRANTY ............................................................................. 11
INSTRUCTIONS FOR ORDERING PARTS ................................... 11
SPECIFICATIONS
MODEL MH25CVX MH80CVX MH200CVX
MAX SUPPLY PRESSURE:
To Regulator MIN 5PSI (34.5 kPa) 5PSI (34.5 kPa) 15PSI (103 kPa)
To Regulator MAX Bottle Pressure Bottle Pressure Bottle Pressure
Regulator Out
Ignition Piezo Piezo Piezo
Min Ambient Temp. 0° F (17.8) ° C 0° F (17.8) ° C 0° F (17.8) ° C
BTU Rating
Low-High
Fuel
Consumption
Hose Length 10' (304 cm) 10' (304 cm) 10' (304 cm)
Figure 1 VENTILATION: Minimum openings required
Opening near floor 2ft² 2ft² 2ft²
Opening near ceiling 2ft² 2ft² 2ft²
11" W.C.
(2.74 kPa)
15,000-25,000
BTU/HR
(4.3-7.3 kW)
1.58 LBS/HR
(.71kg/HR)
11" W.C.
(2.74 kPa)
30,000-80,000
BTU/HR
(8.79-23.4 kW)
1.4-3.7 LBS/HR
(.74-1.8 kg/HR)
Convection Construction Heater Operating Instructions and Owner’s Manual
10 PSI
(68.9 kPa)
75,000-200,000
BTU/HR
(22-58.6 kW)
3.5-9.3 LBS/HR
(1.44-4.32 kg/HR)
GENERAL INFORMATION
RETAIN THIS MANUAL FOR FUTURE REFERENCE.
FOR QUESTIONS, PROBLEMS, MISSING PARTS BEFORE
RETURNING TO RETAILER PLEASE CALL WITH MODEL
NUMBER AND SERIAL NUMBER OF HEATER:
1-800-251-0001
MONDAY-FRIDAY 8-5 PM EASTERN TIME
OR E-MAIL USING THE MR. HEATER WEBSITE:
WWW.MRHEATER.COM
In order to provide the best service possible
Mr. Heater is now giving you more ways to
get in touch with us:
FACEBOOK: Find us on Facebook
TWITTER: Find us on twitter
YouTube: There are now informational videos on YouTube.
WEBSITE: Mr. Heater's full line of product are now at
WWW.MRHEATER.COM
CAUTION! FAILURE TO FOLLOW THESE VENTILATION
REQUIREMENTS MAY RESULT IN SOOTING DAMAGE.
2
OPERATING PRECAUTIONS
This is a propane, direct-fired, convection heater. It's intended use
is primarily temporary heating of buildings under construction,
alteration or repair.
Propane is heavier than air. If propane leaks from a connection or
fitting, it sinks to the floor, collecting there with the surrounding
air, forming a potentially explosive mixture. Obviously, propane
leaks should be avoided, so set up the propane supply with
utmost care. Leak check new connections or reconnections with
a soap and water solution and follow all connection instructions
herein. Also, ask your propane dealer for advice on the propane
application and supply installation and ask him to check it if there
are any questions.
This heater was designed and certified for use as a construction
heater in accordance with ANSI Standard Z83.7/CGA 2.14-
2000. Check with your local fire safety authority if you have
any questions about your applications. Other standards govern
the use of fuel gases and heat producing products in specific
applications. Your local authority can advise you about these.
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. We can
tolerate small amounts but not a lot. 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
So, be sure to follow advice about ventilation in these operating
instructions.
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. Check the heater thoroughly for damage. DO NOT operate
a damaged heater.
2. DO NOT modify the heater or operate a heater which has
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3. DO NOT light or operate heater unless the shells are fully
extended and locked into position.
4. Use only propane gas.
5. Use only VAPOR WITHDRAWAL propane supply. If there
is any question about vapor withdrawal, ask your propane
dealer.
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Secure them from falling or being knocked over and protect
them from damage.
7. Locate propane containers the designated distances
from heater. Additionally, Do not direct exhaust toward
containers.
For USA:
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For Canada:
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8. IMPORTANT Use only the hose and regulator assembly
provided with the heater. Match the color stripe on the hang
tag attached to the hose assembly with the color on the
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Inspect hose assembly before each use of the heater. If
there is excessive abrasion or wear, or hose is cut, replace
with hose assembly listed on parts list before using heater.
9. For indoor use only. Area must be well ventilated. Figure 1.
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10. If at any time gas odor is detected, IMMEDIATELY
DISCONTINUE operation until the source of gas has
been located and corrected.
11. Install the heater such that it is not directly exposed to
water spray, rain and/or dripping water.
12. Maintain minimum clearance from normal combustible
PDWHULDOOLNHSDSHUFigure 2.
13. Due to the high surface and exhaust temperatures, adults
and children must observe clearances to avoid burns or
clothing ignition.
14. Operate only on a stable, level surface.
15. Do not use with duct work. Do not restrict inlet or exit.
16. Do not move, handle or service while hot or burning.
17. Use only in accordance with local codes or, in the
absence of local codes, with the Standard for the Storage
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Installation Code.
Figure 2
MINIMUM CLEARANCE: From normal combustible material
25CVX, 80CVX, 200CVX
Clearance Convection
From sides ..................................................4 ft
From top ....................................................6 ft
Locate 10' from canvas or plastic tarpaulins or similar coverings
and secure them to prevent flapping or movement due to wind
action.
Operating Instructions and Owner’s ManualConvection Construction Heater
3
ODOR FADE WARNING
WARNING
Asphyxiation Hazard
• Do not use this heater for heating human living
quarters.
• Do not use in unventilated areas.
• The flow of combustion and ventilation air must
not be obstructed.
• Proper ventilation air must be provided to
support the combustion air requirements of the
heater being used.
• Refer to the specification section of the heater’s
manual, heater data plate, or contact the factory
to determine combustion air ventilation
requirements of the heater.
• Lack of proper ventilation air will lead to
improper combustion.
• Improper combustion can lead to carbon
monoxide poisoning leading to serious injury or
death. Symptom of carbon monoxide poisoning
can include headaches dizziness and difficulty in
breathing.
ODOR FADING - NO ODOR DETECTED
• Some people cannot smell well. Some people cannot
smell the odor of the man-made chemical added to
propane (LP) or natural gas. You must determine if you
can smell the odorant in these fuel gases.
• Learn to recognize the odor of propane (LP) gas and
natural gas. Local propane (LP) gas dealers will be more
than happy to give you a scratch and sniff pamphlet. Use
it to become familiar with the fuel gas odor.
• Smoking can decrease your ability to smell. Being around
an odor for a period of time can affect your sensitivity
to that particular odor. Odors present in animal
confinement buildings can mask fuel gas odor.
• The odorant in propane (LP) gas and natural gas
is colorless and the intensity of its odor can fade
under some circumstances.
• If there is an underground leak, the movement of gas
through the soil can filter the odorant.
• Propane (LP) gas odor may differ in intensity at different
levels. Since Propane (LP) gas is heavier than air, there
may be more odor at lower levels.
• Always be sensitive to the slightest gas odor. If you
continue to detect any gas odor, no matter how small,
treat it as a serious leak. Immediately go into action as
discussed previously.
FUEL GAS ODOR
LP gas and natural gas have man-made odorants added
specifically for detection of fuel gas leaks.
If a gas leak occurs you should be able to smell the fuel
gas. Since Propane (LP) is heavier than air you should
smell for the gas odor low to the floor. ANY GAS ODOR
IS YOUR SIGNAL TO GO INTO IMMEDIATE ACTION!
• Do not take any action that could ignite the fuel gas.
Do not operate any electrical switches. Do not pull any
power supply or extension cords. Do not light matches
or any other source of flame. Do not use your telephone.
• Get everyone out of the building and away from the
area immediately.
• Close all propane (LP) gas tank or cylinder fuel supply
valves, or the main fuel supply valve located at the meter
if you use natural gas.
• Propane (LP) gas is heavier than air and may settle in low
areas. When you have reason to suspect a propane leak,
keep out of all low areas.
• Use your neighbor’s phone and call your fuel gas supplier
and your fire department. Do not re-enter the building or
area.
• Stay out of the building and away from the area until
declared safe by the firefighters and your fuel gas
supplier.
• FINALLY, let the fuel gas service person and the
firefighters check for escaped gas. Have them air out
the building and area before you return. Properly trained
service people must repair any leaks, check for further
leakages, and then relight the appliance for you.
ATTENTION - CRITICAL POINTS TO
REMEMBER!
• Propane (LP) gas has a distinctive odor. Learn to
recognize these odors. (Reference Fuel Gas Odor and
Odor Fading sections above.
• Even If you are not properly trained in the service and
repair of the heater, ALWAYS be consciously aware of
the odors of propane (LP) gas and natural gas.
• If you have not been properly trained in repair and
service of propane (LP) gas then do not attempt to
light heater, perform service or repairs, or make any
adjustments to the heater on the propane (LP) gas fuel
system.
• A periodic sniff test around the heater or at the heater’s
joints; i.e. hose, connections, etc., is a good safety
practice under any conditions. If you smell even a small
amount of gas, CONTACT YOUR FUEL GAS SUPPLIER
IMMEDIATELY. DO NOT WAIT!
Convection Construction Heater Operating Instructions and Owner’s Manual
4
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