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5

Operating Instructions and Owner’s Manual

Mr. Heater | Forced Air Propane Construction Heater

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 dataplate, 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.

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.

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.

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 property 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!

Summary of Contents for Heatstar MH85FAV

Page 1: ...lowed exactly a fire or explo sion may result causing property damage personal injury or loss of life 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 appli ance WHAT TO DO IF YOU SMELL GAS Do not try to light appliance Extinguish an...

Page 2: ... DAMAGE FROM HAZARDS OF FIRE EXPLOSION BURN ASPHYXIATION CARBON MONOX IDE 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 FIRE BURN INHALATION AND EXPLOSION HAZARD KEEP SOLID COMBUSTIBLES SUCH AS BUIL...

Page 3: ...ducts 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 dizzines...

Page 4: ...e is cut replace with hose assembly listed on parts list before using heater 8 For indoor use only Area must be well ventilated Figure 1 also see Operating Precautions 9 If at any time gas odor is detected IMMEDIATELY DISCONTINUE operation until the source of gas has been located and corrected Read enclosed Odor fade and Propane Sheet for additional information about detecting propane leaks 10 Ins...

Page 5: ...e 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 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 determin...

Page 6: ...tting If the O ring is cut scuffed or otherwise damaged replace it with part number 6681 3 Turn off the gas at the LP gas supply cylinder s when the heater is not in use 4 When the heater is to be stored indoors the connection between the LP gas supply cylinder s and the heater must be disconnected and the cylinder s removed from the heater and stored out of doors and in accordance with Chapter 5 ...

Page 7: ...expected at the bottom of the chart 2 Move straight up to time of operation desired left side of chart 3 Read the cylinder size required All heaters should have full cylinders good air circulation no frost on cylinders MAXIMUM OPERATING TIME HOURS MAXIMUM OPERATING TIME HOURS MAXIMUM OPERATING TIME HOURS 55 000 BTU HR 16 1 kW 85 000 BTU HR 33 4 kW 125 000 BTU HR 49 1 kW AIR TEMPERATURE o F o C AIR...

Page 8: ...unction Block 1806 Orange 6 152mm Relay Thermocouple Junction Block MH55FAV MH85FAV MH125FAV WIRING CHART WIRING DIAGRAMS CONNECTION DIAGRAM MOTOR IGNITOR B SCHEMATIC DIAGRAM HIGH LIMIT SWITCH THERMOCOUPLE SPARK PLUG MOTOR IGNITOR RELAY GAS HIGH LIMIT SWITCH SPARK PLUG THERMOCOUPLE R or Y R or Y I1 I2 B or O B B W B RELAY B W B W G LINE CORD 115V 60HZ VALVE I1 I2 COLOR CODE LEGEND BLACK BLUE WHITE...

Page 9: ...1654 Motor Grille Assy 1 20 3676 Brkt Motor Mounting 1 21 1652 Motor Assy 1 22 6086 Fan 7 1 23 1729 Outer Cylinder Assy 1 24 7094 Clip Handle Mounting 2 REF ITEM DESCRIPTION QTY 25 7095 Handle 1 26 6225 Snap Bushing 5 8 1 27 6226 Universal Bushing 1 28 6224 Snap Bushing 1 2 1 29 6654 Thermocouple 13 Lg w J B 1 30 1082 Spark Plug 1 31 3037 Spark Plug Nut 2 32 6121 Ftg Male Elbow 1 33 3038 Orifice N...

Page 10: ... 1 17 3275 Spark Ignition 115V 1 18 1668 Fuel Tube Assembly 1 19 6133 Fitting Coupling 1 20 3787 Spacer TC Bracket 1 21 6127 Fitting Male Connector 1 22 7285 TE Valve 1 23 7404 Ball Valve Variable Rate 1 REF ITEM DESCRIPTION QTY 24 7405 Fitting Female Connector 1 25 3690 Control Panel Assembly 1 26 6223 Strain Relief Bushing 1 27 1036 Power Cord 1 28 6152 Hose Assembly 1 29 6257 Regulator 28 W C 1...

Page 11: ...41 Terminal Board 1 21 6065 Spacer Steel 1 22 1811 Relay Assembly 1 23 3275 Ignitor Hi Lo 801 Mini 1 24 6079 Spacer PC Standoff Nylon 3 25 6265 Fitting Elbow Street 2 26 7897 Ball Valve Variable Rate 1 REF ITEM DESCRIPTION QTY 27 7405 Fitting Female Connector 1 28 6227 Snap Bushing 1 1 4 Nylon 1 29 7158 Snap Bushing 3 4 Nylon 1 30 6133 Fitting Coupling 1 31 6127 Fitting Male Connector 1 32 7285 Va...

Page 12: ...4135 Include your name address and telephone number and include details concerning the claim Also supply us with the purchase date and the name and address of the dealer from whom you purchased our product The foregoing is the full extent of the responsibility of the Company There are no other warranties express or implied Specifically there is no warranty of fitness for a particular purpose and t...

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