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Mr. Heater MHU 80 User Manual

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02/12  Rev. 12A  #60185
MR. HEATER, INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 •800-251-0001
COMPACT UNIT HEATER FOR COMMERCIAL USE
WARNING: 
Improper installation, adjustment, alteration, service or maintenance 
can cause injury or property damage. Refer to this manual. For assistance or 
additional information consult a qualified installer, service agency or the gas supplier.
—
  WHAT TO DO IF YOU SMELL GAS
  •  Open Windows
  • 
DO NOT try to light any appliance.
  • 
DO NOT use electrical switches.
  • 
DO NOT use any telephone in your house. Immediately call your local gas supplier from a  
 
 
neighbor’s telephone. Follow the gas supplier’s instructions.
 
• 
Do not touch any electrical switch; do not use any phone in your building.
 
• 
Installation and service must be performed by a qualified installer, service agency or the gas    
 
supplier.
  • 
If you cannot reach your gas supplier, call the Fire Department.
FOR YOUR SAFETY: 
Do not store or use gasoline or other flammable vapors and liquids in the vicin-
ity of this or any other appliance.
WARNING: If the information in these instructions are not followed exactly, a fire or 
explosion may result causing property damage, personal injury or loss of life.
LANGUAGES
ENGLISH 
 
Pages E1 — E16
SPANISH
 
Pages S1 — S16
FRENCH
 
Pages F1 — F16
For model serial numbers, 
see page E16.
COMPACT UTILITY HEATER FOR RESIDENTIAL USE
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.
MHU 50
MHU 80
Model #