Operational Instructions Only - No Parts List
OPERATING INSTRUCTIONS
Model #
MH9B GR
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.
PORTABLE PROPANE HEATER FOR
RECREATIONAL AND COMMERCIAL USE
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 ame.
• Shut off gas to appliance.
— Service must be performed by a qualified service agency.
This is an unvented gas-red 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.
04/08 73432TGR Rev. DENERCO GROUP INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 • 216-916-3000
WARNING:
Every time hose or tank is connected to unit, connection
must be checked for leaks in one or more ways: Apply
soapy water to connection, look for bubbles, listen for
hiss of escaping gas, feel for extreme cold, smell for rot-
ten egg odor. Do not use if leaking!
WARNING:
Any changes to this heater or its controls can be danger-
ous.
WARNING:
Early signs of carbon monoxide poisoning resemble the
flu, with headache, dizziness and/or nausea. If you have
these signs, heater may not be working properly. Get
fresh air at once! Have heater serviced.
WARNING:
If the recreational or commercial enclosure does not
have a window or roof vent, DO NOT USE THIS HEATER
INSIDE.
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).
CONTENTS
General Safety Instructions ............................................... 3
General Information .......................................................... 3
Operating with Disposable Propane Cylinders
Operating With Hose Connected to Remote Cylinder
Maintenance.....................................................................5
Troubleshooting ................................................................ 6
Parts List
Parts Ordering Information ............................................... 8
Service Information
........................................................................... 6
........................................................... 8
...................4
........ 4
SPECIFICATIONS
MODEL NO. .................................................MH9B GR
GAS TYPE ......................................................PROPANE
INPUT BTU/HR. .......................................4,000 / 9,000
CLEARANCE TO COMBUSTIBLES
TOP ....................................................................... 30”
FRONT ....................................................................24”
SIDES ...................................................................... 6”
REAR ....................................................................... 0”
Mr. Heater | Portable Buddy Operating Instructions and Owner’s Manual
2
GENERAL SAFETY INSTRUCTIONS
THIS IS A HEATING APPLIANCE. DO NOT OPERATE
THIS APPLIANCE WITHOUT THE FRONT WIRE GUARD
INSTALLED
• Due to high temperatures, the appliance should be
located out of traffic and away from combustible materials.
• Children and adults should be alerted to the hazard of
high surface temperatures and should stay away to avoid
burns or clothing ignition.
• Young children should be carefully supervised when they
are near the appliance.
• Do not place clothing or other flammable material on or
near the appliance.
• Do not operate heater in any moving vehicle.
• This heater can only be used in a recreational or com-
mercial enclosure with a window or roof vent. It may
also be used outdoors.
• This heater requires a vent area of 9 square inches (ex-
ample 3” x 3” opening) minimum for adequate ventila-
tion during operation. Do not use other fuel burning
appliances inside.
• GAS PRESSURE AT HEATER IS REGULATED AND FIXED
AT 11” W.C. WHEN USING A REMOTE HOSE CONNECTION DO NOT REGULATE OR REDUCE PROPANE TANK
SUPPLY PRESSURE TO HEATER!
• REGULATOR IN HEATER MUST ALWAYS BE IN PLACE
DURING OPERATION.
• Any safety screen or guard removed for servicing the ap-
pliance must be replaced prior to operating the heater.
• The appliance should be inspected before each use.
Frequent cleaning may be required. The control compartments, burner and circulating air passageways of
the appliance must be kept clean, see MAINTENANCE.
• DO NOT use this heater if any part has been under
water. Immediately call a qualified service technician to
inspect the heater and to replace any part of the control
system and any gas control, which has been under water.
• When used without adequate combustion and ventila-
tion air, this heater may give off excessive CARBON
MONOXIDE, an odorless, poisonous gas.
• Some people - pregnant women, persons with heart
or lung disease, anemia, those under the influence of
alcohol, those at high altitudes - are more affected by
carbon monoxide than others.
• When heater is placed on the ground, make sure the
ground is level and keep any objects at least 24 inches
from the front of the heater. THIS HEATER IS EQUIPPED
WITH A TIP OVER SWITCH THAT WILL SHUT THE HEATER OFF IF THE HEATER TIPS OVER HOWEVER, DO NOT
LEAVE HEATER UNATTENDED OR WHERE CHILDREN
MAY CAUSE THE HEATER TO TIP OVER. NEVER OPERATE
THE HEATER WHILE SLEEPING!
GENERAL INFORMATION:
• This heater is safe for indoor use in small recreational
enclosures, having means for providing combustion air
and ventilation, such as enclosed porches, cabins, fishing
huts, trailers, tent trailers, tents, truck caps and vans.
It may be used for emergency indoor heating when
connected to a disposable 1-lb. propane cylinder and
for indoor use in commercial enclosures, having means
for providing combustion air and ventilation, such as
construction trailers or temporary work enclosures.
Note: The heater can be used outdoors, but may experi-
ence nuisance shutoffs due to certain wind conditions.
• When the heater is cold or at room temperature, it will
take a few minutes for the burner tile to turn bright orange. This is normal and the heater is working properly.
If burner tile is visibly flaming, turn heater off and call a
qualified service technician.
• When the unit is lit, there should be about a quarter
inch (1/4”) border around the tile that will not turn
bright orange. This is normal.
• When operating the heater for the first time, the top
area of the reflector may discolor. This is also normal
and is no reason for concern.
• When operating the heater at altitudes over 7,000 FT.
above sea level, the unit may not burn as bright as in
lower altitudes. This is normal. At higher altitudes, the
heater may shut-off. If this happens, provide fresh air,
wait 5 minutes and re-light. Due to local atmospheric
conditions heater may not re-light.
• Operating time will vary depending on the heater set-
ting and the supply cylinder size. 3 to 6 hours on a 1 lb.
cylinder. 48 to 110 hours on a 20 lb. cylinder (based on
“HI” and “LO” settings).
• When moving heater when lit or bumping heater setting
it down, tip over switch may shut off heater. If this happens, re-light.
• Due to natural operation of small tanks, condensation
may build up on tank and drip on surface under heater.
Operating Instructions and Owner’s ManualMr. Heater | Portable Buddy
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LIGHTING / OPERATING INSTRUCTIONS
FOR USE WITH DISPOSABLE 1 LB. PROPANE
CYLINDERS:
WARNING: Always inspect propane cylinder and heater propane
connections for damage, dirt, and debris before attaching
propane cylinder. Do not use if head of cylinder is damaged,
punctured or deteriorated.
ALWAYS ATTACH OR DETACH CYLINDER OUTDOORS AWAY
FROM FLAMES, OTHER IGNITION SOURCES, AND ONLY WHEN
HEATER IS COOL TO TOUCH. NEVER SMOKE WHEN ATTACHING
OR REMOVING PROPANE CYLINDER OR MAKING REMOTE
CONNECTIONS!
• Use only LP-gas cylinders marked in accordance with the
U.S. Dept. of Transportation (DOT).
• Use only 16.4 oz. (1 lb.) disposable cylinders that mate
with No. 600 valve connection.
• Heater and attached cylinder must be in an upright posi-
tion during operation.
• Make sure four-position Control Knob is in “OFF” posi-
tion; see Figure 1.
Figure1
• Screw 1 lb. disposable LP-gas supply cylinder clockwise
(from bottom) into portable heater until hand-tight.
• Check cylinder connection for leaks with soapy water at
the threaded connection under the domed plastic cover
where the cylinder screws into the regulator. SEE WARNING! ON PLASTIC COVER.
• Depress and turn Control Knob counterclockwise to
“PILOT” position and hold for 30-60 seconds.
• Depress red spark ignition button to light pilot flame
(repeat until pilot lights) and continue to hold Control
Knob down and at “PILOT” position for 30-60 seconds
to enable Pilot Light Safety System.
• After lighting pilot, release knob. Knob should return
to fully extended position. To operate heater slightly
depress knob and gently turn to lock in desired position.
• Fully turn Control Knob to “HI” position to light burner
tile. Leave on “HI” position until burner tile turns bright
orange.
• After burner tile has turned bright orange, adjust heat
output by turning Control Knob to desired position
(“LO” or “HI” setting)
Warning:
DO NOT OPERATE HEATER UNLESS CONTROL KNOB IS
LOCKED IN A POSITION MARKED “HI”, “LO” or “PILOT”.
NEVER SET CONTROL KNOB BETWEEN LOCKED POSITIONS. POOR COMBUSTION AND HIGHER LEVELS OF
CARBON MONOXIDE MAY RESULT.
• To shut off heater, slightly push down and turn Control
Knob clockwise to “OFF” position.
• CAUTION: After turning heater off, wire guard will
remain hot. Allow to thoroughly cool before storing.
• Do not operate, store or remove cylinder near flam-
mable items or ignition sources.
• LP-GAS CYLINDERS MUST BE DISCONNECTED FROM
HEATER WHEN NOT IN USE!
LIGHTING / OPERATING INSTRUCTIONS FOR
USE WITH HOSE CONNECTED TO A REMOTE
CYLINDER, MAXIMUM SIZE 20 LBS:
• This Heater may be used in a recreational enclosure or
temporary construction work enclosure with a remote
refillable propane cylinder ONLY when the cylinder is
located outdoors and the Heater is used with Mr. Heater
Hose No. F273701, F273702 or F272702 and fuel filter
F273699. Fuel filter must be replaced annually. Or use
F273704 Buddy series hose. Fuel filter not required.
• DANGER: NEVER bring a refillable propane cylinder
indoors. A re or explosion can occur causing property
damage, serious injury or death!
• Inspect the hose before each use of the heater. If there
is excessive abrasion or wear, or the hose is cut, replace
prior to using the heater with one of the Mr. Heater
Hose No’s. shown above.
• The propane cylinder must include a listed overfilling
protection device as well as a collar to protect the cylinder valve.
• Heater must be in an upright position during operation.
• Make sure four-position Control Knob is in “OFF” posi-
tion; see Figure 1, at left.
• Screw hose connector into regulator on heater and
screw connector on other end of hose into LP-gas supply
cylinder valve. Tighten all hose connections.
• Mr. Heater strongly recommends using disposable fuel
filter F273699 to trap any oil substances when connected to a remote cylinder that can make heater inoperable.
• Open valve at LP-gas supply cylinder.
• Check all hose connections for leaks with soapy water at
the threaded connection under the domed plastic cover
where the hose connector screws into the regulator and
at LP-gas supply cylinder. SEE WARNING!
Mr. Heater | Portable Buddy Operating Instructions and Owner’s Manual
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• Depress and turn Control Knob counterclockwise to “PI-
LOT” position and hold for 1 - 2 minutes. This may take
longer to purge air from the supply hose depending on
the length of the hose being used.
• Depress red spark ignition button to light pilot flame
(repeat until pilot lights) and continue to hold Control
Knob down and at “PILOT” position for 30-60 seconds
to enable Pilot Light Safety System.
• After lighting pilot, release knob. Knob should return
to fully extended position. To operate heater slightly
depress knob and gently turn to lock in desired position.
• Fully turn Control Knob to “HI” position to light burner
tile. Leave on “HI” position until burner tile turns bright
orange.
• After burner tile has turned bright orange, adjust heat
output by turning Control Knob to desired position
(“LO” or “HI” setting).
Caution: Do not try to adjust heating levels by using the
propane tank shut off valve.
Warning:
DO NOT OPERATE HEATER UNLESS CONTROL KNOB IS
LOCKED IN A POSITION MARKED “HI”, “LO” or “PILOT”.
NEVER SET CONTROL KNOB BETWEEN LOCKED POSITIONS. POOR COMBUSTION AND HIGHER LEVELS OF
CARBON MONOXIDE MAY RESULT.
• To shut off heater, shut of f propane at supply tank,
allow heater to use-up propane in supply line until heater shuts off, then slightly push down and
turn Control Knob clockwise to “OFF” position.
• CAUTION: After turning heater off, wire guard will
remain hot. Allow to thoroughly cool before storing.
• When not in use, the gas must be turned off at the
LP-gas supply cylinder. As stated before allow heater
to use up propane in supply line until heater shuts off.
When the LP-gas supply cylinder is not disconnected
from the heater, the heater and the cylinder must be
stored outdoors, in a well ventilated space, out of reach
of children, and must not be stored in a building, garage
or any other enclosed area.
• Indoor storage of the heater is permissible only if the
cylinder is disconnected and removed from the heater.
Cylinders must be stored outdoors out of the reach of
children and must not be stored in a building, garage or
any other enclosed area.
MAINTENANCE:
Always keep the heater area clear and free from
combustible materials, gasoline and other flammable
vapors and liquids.
Keep the vent areas (slots in the bottom and the top at the
front of heater) clear at all times.
Visually inspect the pilot flame and burner periodically
during use. The pilot ame should be blue in color (not
yellow) and will extend beyond the thermocouple. The
flame will surround the thermocouple just below the tip,
see Figure 2.
Figure 2
A slight yellow flame may occur where the pilot flame
and main burner flame meet. The burner should be bright
orange (with a slight blue color around the border, a redorange haze that is visible on the ceramic tile is acceptable)
and without a noticeable flame. A blue flame that rolls out
at the top of the ceramic tile indicates an accumulation of
dust, lint or spider webs inside the casing assembly and
main burner assembly. If the pilot is yellow or the burner
has a noticeable flame, cleaning may be required. Use the
following procedure to inspect the casing assembly and
main burner assembly.
It is necessary to periodically check the burner orifice and
burner venturi tube to make sure they are clear of insects/
nests or spider webs that may accumulate over time. A
clogged tube can lead to a fire.
1 Allow heater to thoroughly cool before performing any
maintenance.
2 Remove disposable 1 lb. cylinder from heater or turn
OFF gas supply at remote cylinder valve, and disconnect
hose from heater.
3 Remove wire guard from front of heater by gently bend-
ing to remove from holes in front cover.
4 Remove (1) burner assembly retaining screw from bot-
tom of the heater.
5 Pull burner assembly from front of the heater.
6 Inspect interior of casing assembly for accumulation
of dust, lint or spider webs. If necessary, clean interior
of casing assembly with a vacuum cleaner or apply air
pressure. Do not damage any components within casing
assembly when you are cleaning.
7 Inspect and clean main burner orice (mounted to pilot
bracket with jam nut) by using a vacuum or apply air
pressure at orifice opening.
8 Inspect and clean pilot (mounted to bracket) by using a
vacuum or apply air pressure through the holes in the
pilot indicated by the arrows in Figure 2.
WARNING: Never use needles, wires, or similar cylindrical objects to clean the pilot to avoid damaging the
calibrated ruby that controls the gas flow.
Operating Instructions and Owner’s ManualMr. Heater | Portable Buddy
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9 Apply air pressure (max. 30 psi.) into ceramic tile of
burner assembly and the venturi tube (with cone on
end, ref. item #21) to remove dust, lint or spider webs.
10 Make sure the burner tile assembly is completely seated
against the reflector.
11 Carefully slide burner assembly back into casing as-
sembly making sure to center reflector flange with the
casing opening and hold in place while installing burner
assembly screw in the bottom of the heater.
12 Install wire guard by gently bending and inserting into
the (4) holes in the front cover.
TROUBLESHOOTING INFORMATION:
If Spark electrode does not produce spark.
CHECK
• Spark electrode broken – replace.
• Igniter wire may not be attached to spark
electrode, ground wire may not be attached to
frame - attach.
• Igniter wire damaged – replace.
• Piezo igniter defective – replace.
If Spark electrode produces spark but pilot does not light.
CHECK
• No gas to heater – install disposable cylinder
or connect hose and turn on valve at remote
cylinder.
• “PILOT” position not properly aligned – turn
gas control knob to “PILOT” position and
depress.
• Pilot is blocked from spider web or dirt – clean
pilot, see MAINTENANCE.
If Pilot flame does not stay lit when knob is released.
CHECK
• Control knob in “PILOT” position not
completely depressed or held in long enough
to purge air from lines.
• Pilot ame not surrounding thermocouple –
clean pilot, see MAINTENANCE.
• Pilot Assembly defective – replace.
• Tip switch wires disconnected – connect.
If Main burner does not ignite.
CHECK
• Main burner orice is blocked – clean burner,
see MAINTENANCE.
If Heater keeps shutting “OFF” during normal operation.
CHECK
• Pilot is blocked – clean pilot, see
MAINTENANCE.
• Provide minimum fresh air opening of 9 square
inches (example 3” x 3” opening).
• Tip over switch activated from bumping heater.
Re-light
ACCESSORIES:
ITEM # DESCRIPTION
F273701 5 ft. PROPANE HOSE ASSEMBLY (Swivel
1”-20 Male Throwaway Cyl. Thd. X P.O.L. w/
Handwheel) (Recommended use with fuel lter.)
F273702 12 ft. PROPANE HOSE ASSEMBLY
(Swivel 1”-20 Male Throwaway Cyl. Thd. X P.O.L. w/
Handwheel) (Recommended use with fuel lter.)
F272702 12 ft. PROPANE HOSE ASSEMBLY
(Swivel 1”-20 Male Throwaway Cyl. Thd. X P.O.L.
Handwheel) (Recommended use with fuel lter.)
F273699 Fuel Filter (Replace Annually)
F273704 10 ft. BUDDY-SERIES HOSE ASSEMBLY
(Fuel lter not required)
Mr. Heater | Portable Buddy Operating Instructions and Owner’s Manual
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Operating Instructions and Owner’s ManualMr. Heater | Portable Buddy
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OPERATING INSTRUCTIONS
Model #
AND OWNER’S MANUAL
MH9B GR
WARNING:
USE ONLY MANUFACTURER’S REPLACEMENT PARTS. USE OF ANY OTHER PARTS
COULD CAUSE INJURY OR DEATH. REPLACEMENT PARTS ARE ONLY AVAILABLE
DIRECT FROM THE FACTORY AND MUST BE INSTALLED BY A QUALIFIED SERVICE
AGENCY. MR. HEATER HOSES F273701, F273702 AND F272702 ARE SPECIFICALLY
DESIGNED FOR USE WITH THIS HEATER ALONG WITH F273699 DISPOSABLE FUEL
FILTER (REPLACE ANNUALLY). USE OF OTHER HOSES MAY CAUSE THE HEATER TO
BECOME INOPERABLE.
PARTS ORDERING INFORMATION:
PURCHASING: Accessories may be purchased at any Mr. Heater local dealer or
direct from the factory
FOR INFORMATION REGARDING SERVICE
Please call Toll-Free 800-251-0001
www.mrheater.com
Our ofce hours are 8:30 AM – 5:00 PM, EST, Monday through Friday.
Please include the model number, date of purchase, and description of problem in
all communication.
LIMITED WARRANTY
Enerco Group, Inc. warrants its heaters and accessories to be free from defects in
material and workmanship for a period of 1 year from date of purchase. Enerco
Group, Inc. will repair or replace this product free of charge if it has been proven
to be defective within the 1-year period, and is returned at customer expense with
proof of purchase to Enerco Group, Inc. within the warranty period.
Enerco Group, Inc. reserves the right to make changes at any time, without notice or
obligation, in colors, specifications, accessories, materials and models.
ENERCO GROUP, INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 • 216-916-3000
Mr. Heater and Portable Buddy are registered trademarks of Enerco Group, Inc.
© 2003, Enerco/Mr. Heater. All rights reserved
CSA 4.98
U.S.
Mr. Heater | Portable Buddy Operating Instructions and Owner’s Manual
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04/08 73432TGR Rev. D
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