Mr. Heater MH400FAVT Operating Manual
Starting Serial #0253700
OPERATING INSTRUCTIONS AND OWNER’S MANUAL
MR. HEATER
MODEL
MH400FAVT
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.
HEATSTAR
MODEL
HS400FAVT
Model # 400FAVT
FORCED-AIR PROPANE
CONSTRUCTION HEATER
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.
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.
04/07 Rev. C 72426ENERCO GROUP, INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 • 216-881-5500
WARNING:
YOUR SAFETY IS IMPORTANT TO YOU AND TO OTHERS,
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
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.
WARNING:
The State of California requires the following 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).
CONTENTS
Specifications .................................................................. 2
Operating Precautions ..................................................... 3
Safety Precations ............................................................. 3
Odor Fade Warning ......................................................... 4
Operating Instructions ..................................................... 5
Storage & Service ............................................................ 5
Wiring Diagram ............................................................... 6
Parts List ......................................................................... 7
Exploded View Drawing ................................................... 7
SPECIFICATIONS
MODEL NO. ..................................................... 400FAVT
GAS TYPE ......................................................... Propane
BTU RATING ........................... 210,000-400,000 BTU/hr
(61.5 – 117 kW)
GAS SUPPLY PRESSURE TO REGULATOR
Maximum: Bottle Pressure, Minimum: 20 psig (0.14 MPa)
REGULATOR OUT .............................. 20 psig (0.14 MPa)
ELECTRICAL INPUT ...................... 115V, 60 Hz, 1Ø, 5.5a
IGNITION ......................... Direct Spark, interrupted type
PRIMARY FLAME CONTROL SolidState, 10-15 sec. timing
HIGH TEMPERATURE CONTROL ............... 240°F (116°C)
Minimum Ambient Temp Rating: 0°F (-17.8°C)
FUEL CONSUMPTION ........................... 9.3- 18.5 lbs/hr
(4.2 – 8.4 kg/hr)
FUEL ORIFICE PORT NO.: .............................................. 1
FUEL ORIFICE PORT SIZE: ................................. 2.35 MM
HEATED AIR OUTPUT: .......... 1400 CFM (39.6 CU-M/M)
Enerco Group, Inc. | Force-Air Propane Construction Heater Operating Instructions and Owner’s Manual
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04/07 Rev. C 72426
OPERATING PRECAUTIONS
SAFETY PRECAUTIONS
This is a propane, direct-fired, forced air heater. Its 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. Read enclosed
Odor Fade and Propane Sheet for additional information
about detecting propane leaks. 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.
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 circumvented 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.
Figure 1
VENTILATION: Minimum openings required
Opening Opening
Heater near floor near ceiling
Forced air (400 FAVT) 3.5 ft
2
3.5 ft
2
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
been modified from its original condition.
3. Use only propane gas.
4. Use only VAPOR WITHDRAWAL propane supply. If there is
any question about vapor withdrawal, ask your propane
dealer.
5. Mount the propane cylinders vertically (shutoff valve up).
Secure them from falling or being knocked over and protect
them from damage.
6. Locate propane containers at least (USA) 7 ft. (2.13m),
(Canada) 10 ft. (3m) from the heater and do not direct
exhaust toward containers.
7. IMPORTANT Use only the hose and regulator assembly
provided with the heater. Match the color stripe on the
hangtag attached to the hose assembly with the color on
the label located near the propane inlet fitting on the
heater. 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.
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. Install the heater such that it is not directly exposed to
water spray, rain and/or dripping water.
11. Maintain minimum clearance from normal combustible
material (like paper). Figure 2
12. Due to the high surface and exhaust temperatures, adults
and children must observe clearances to avoid burns or
clothing ignition.
13. Operate only on a stable, level surface.
14. Do not use with ductwork. Do not restrict inlet or exit.
15. Use only the 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).
16. Use only a properly grounded 3-prong receptacle or
extension cord.
17. Do not move, handle or service while hot or burning.
18. Use only in accordance with local codes or, in the absence
of local codes, with the Standard for the Storage and
Handling of Liquefied Petroleum Gases ANSI/NFPA 58 and
CSA B149.1, Natural Gas and Propane Installation Code.
Figure 2
MINIMUM CLEARANCE: From normal combustible material
Clearance Forced Air 400FAVT
From floor ..................................................... 0 ft
From outlet ................................................... 8 ft
From sides..................................................... 2 ft
From top ....................................................... 3 ft
Locate 10 ft. from canvas or plastic tarpaulins or similar
coverings and secure them to prevent flapping or movement
due to wind action.
Enerco Group, Inc. | Force-Air Propane Construction Heater Operating Instructions and Owner’s Manual
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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 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 or 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!
Enerco Group, Inc. | Force-Air Propane Construction Heater Operating Instructions and Owner’s Manual
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04/07 Rev. C 72426
OPERATING INSTRUCTIONS
PREPARING FOR OPERATION
1. Check the heater for possible shipping damage. If any is
found, immediately notify the factory.
2. Follow all of the “Precautions”.
3. Connect the POL fitting of hose and regulator assembly to
the propane cylinder by rotating the POL nut
counterclockwise into the propane cylinder’s valve outlet
and securely tighten with a wrench.
4. Connect the hose to the heater by rotating the hose fitting
clockwise.
5. Securely tighten all gas connections.
6. Open the cylinder’s gas valve and check all gas connections
with a soap and water solution. DO NOT USE A FLAME.
7. Connect power cord to well-grounded 115V, 60 Hz, 1Ø
source of power.
8. When using an extension cord, make certain that it is a 3wire (grounded) cord of proper wire size.
START
1. Slowly open the main valve at propane cylinder to prevent
excess flow check valve from closing.
2. Set thermostat to full on. Heater will ignite automatically.
3. Adjust ball valve on control panel to desired burn rate.
4. Set thermostat to desired temperature. Heater will turn off
and on automatically as the temperature varies in the
heater area.
When the heater is working properly:
• The flame is contained within the heater.
• The flame is essentially blue with perhaps some yellow
tipping.
• There is no strong disagreeable odor, eye burning or
other physical discomfort.
• There is no smoke or soot internal or external to the
heater.
• There are no unplanned or unexplained shut downs of
the heater.
The parts lists and wiring diagram show the heater as it was
constructed. Do not use a heater which is different from that
shown. In this regard, use only the hose, regulator and cylinder
connection fitting (called a POL fitting) supplied with the heater.
IMPORTANT Match the color stripe on the hangtag attached to
the hose assembly with the color on the label located near the
propane inlet fitting on the heater. Do not use alternates. For
this heater, the regulator must be set as shown in
“specifications”. If there is any uncertainty about the regulator
setting, have it checked.
A heater which is not working right must be repaired, but only
by a trained, experienced service person.
In-warranty products will be repaired with no charge for either
parts or labor. Please include a brief statement indicating date,
place of purchase, the nature of the problem and proof of
purchase.
STOP
1. Securely close valve on the propane cylinder.
2. Continue to operate heater until all fuel in the hose has
burned.
3. Turn the heater thermostat to “off”. For extended shut
down or in areas where the temperature is below 0°F,
unplug the heater.
RESTART AFTER SAFETY SHUTDOWN
1. Securely close valve at propane cylinder. Unplug heater.
2. Wait 5 minutes.
3. Restart following “Start” procedure.
MAINTENANCE AND STORAGE
1. The heater should be inspected before each use, and at
least annually by a qualified person.
2. Before each use, check the soft “O” ring seat at the
bullnose of the POL fitting. If the “O” ring is cut, scuffed, or
otherwise damaged, replace it with part number
73786.
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 of the standard for Storage and Handling of
Liquefied Petroleum Gases ANSI/NFPA 58 and CSA B149.1,
Natural Gas and Propane Installation Code.
Out-of-warranty products will be repaired with a charge for
parts and labor.
SIZE AND CAPACITY
OF PROPANE CYLINDERS
The charts below show the approximate size of the cylinder
required for these heaters. To use the chart:
1. Select the lowest air temperature expected (at the
bottom of the chart).
2. Move straight up to time of operation desired (left side
of the chart).
3. Read the cylinder size required.
All heaters should have:
Full cylinders with good air circulation and no frost on cylinders
SERVICING
A hazardous condition may result if a heater is used that has
been modified or is not functioning properly.
Enerco Group, Inc. | Force-Air Propane Construction Heater Operating Instructions and Owner’s Manual
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