MrHeater MR HEATER MH4B User manual

PORTABLE PROPANE HEATER FOR
RECREATIONAL, COMMERCIAL AND
EMERGENCY INDOOR USE
ENERCO GROUP INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 • 216-916-3000
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.
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.
MR HEATER STARTING SERIAL #: MHC151000001001 BASECAMP STARTING SERIAL #: MHC151100001001
06/08 15125 Rev. A
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.
MH4B
MODEL
MODEL
OPERATING INSTRUCTIONS AND OWNER’S MANUAL
MR. HEATER BASECAMP
MH4BC

2
Mr. Heater MH4B | Base Camp MH4BC Operating Instructions and Owner’s Manual
WARNING:
Every time 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 rotten egg
odor. Do not use if leaking!
WARNING:
Any changes to this heater or its controls can be
dangerous.
WARNING:
Early signs of carbon monoxide poisoning resemble the
u, 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.
SPECIFICATIONS
MODEL NO. .........................................MH4B/MH4BC
GAS TYPE......................................................PROPANE
INPUT BTU/HR....................................................3,800
CLEARANCE TO COMBUSTIBLES
TOP ....................................................................... 30”
FRONT....................................................................24”
SIDES ...................................................................... 6”
REAR....................................................................... 0”
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 ................... 4
Maintenance..................................................................... 4
Troubleshooting ................................................................ 5
Parts List........................................................................... 6
Parts Ordering Information ............................................... 8
Service Information........................................................... 8

3Operating Instructions and Owner’s ManualMr. Heater MH4B | Base Camp MH4BC
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 and
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
experience 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 be approximately 5 1/2 hours on a
one 1lb. cylinder.
• 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.
• Due to high temperatures, the appliance should be
located out of trafc and away from combustible materi-
als.
• 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 4 square inches (ex-
ample 2” x 2” 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.
• 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 com-
partments, 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 qualied service technician to
inspect the heater and to replace any part of the control
system and any gas control, which has been under wa-
ter.
• 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 HEAT-
ER 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 SAFETY INSTRUCTIONS
THIS IS A HEATING APPLIANCE. DO NOT OPERATE
THIS APPLIANCE WITHOUT THE FRONT WIRE GUARD
INSTALLED

4
Mr. Heater MH4B | Base Camp MH4BC Operating Instructions and Owner’s Manual
inside the housing assembly and main burner assembly. If
the pilot is yellow or the burner has a noticeable ame,
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 to make sure that they are clear of insects/
nests or spider webs that may accumulate over time. A
clogged tube can lead to a fire.
CLEANING INSTRUCTIONS:
1. Allow heater to thoroughly cool before performing
any maintenance.
2. Remove disposable 1 lb. propane cylinder from
heater.
3. Remove right side plastic service panel (ref.5) by
removing the six screws holding it in place.
4. Inspect the interior of casing for accumulation of
dust, lint or spider webs. If necessary, clean the
interior of the casing assembly with a vacuum cleaner
or compressed air (max 30 psi). Do not damage any
components within the casing assembly when you
are cleaning.
5. Inspect and clean main burner (ref. 13) and orice
(ref. 3) by using a vacuum or compressed air (max 30
psi).
6. Inspect and clean pilot tube (ref. 14). Insert a
doubled over pipe cleaner into the pilot tube until
it bottoms against the pilot orice (approximately
2”). Rotate the pipe cleaner a couple of times
and remove. Blow out the remaining debris using
compressed air.
WARNING: Never use needles, wires or similar cylindrical
objects to clean the pilot to avoid damaging the
calibrated ruby that controls the gas ow through the
pilot orifice.
7. Apply compressed air (max 30 psi) into the ceramic
tile of burner assembly and venturi tube (ref. 13) to
remove dust, lint and spider webs.
8. Reinstall the right side plastic service panel.
LIGHTING / OPERATING INSTRUCTIONS
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!
• 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
position during operation.
• Screw 1 lb. disposable LP-gas supply cylinder clockwise
(from bottom) into portable heater until hand-tight and
fit cylinder into stand.
• 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 “ON” button to light pilot ame (repeat until
pilot lights) and continue to hold for 30-60 seconds.
• After lighting pilot, release “ON” button to light heater.
• To shut off heater, press the “OFF” button.
• CAUTION: After turning heater off, wire guard will
remain hot. Allow to thoroughly cool before storing.
• Do not operate, store or remove cylinder near
flammable items or ignition sources.
• LP-GAS CYLINDERS MUST BE DISCONNECTED FROM
HEATER WHEN NOT IN USE!
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 top of the
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 to the thermocouple. The ame will
surround the thermocouple just below the tip, see Figure 2.
A slight yellow ame may occur where the pilot ame
and main burner flame meet. The burner should be bright
orange (with a slight blue color around the border, a red-
orange haze that is visible on the ceramic tile is acceptable)
and without a noticeable ame.
A blue flame that rolls out at the top of the ceramic tile
indicates an accumulation of dust, lint or spider webs
Pilot Flame
Oxygen Depletion Sensor
Figure 2

5Operating Instructions and Owner’s ManualMr. Heater MH4B | Base Camp MH4BC
TROUBLESHOOTING INFORMATION:
If Spark electrode does not produce spark.
CHECK
• Spark electrode broken – replace.
• Igniter wire may not be attached to spark
electrode.
• Igniter wire damaged – replace.
• Piezo igniter defective – replace regulator valve
assembly.
If Spark electrode produces spark but pilot does not light.
CHECK
• No gas to heater – re-install or replace gas
cylinder.
• Pilot is blocked from spider web or dirt – clean
pilot, see MAINTENANCE.
If Pilot flame does not stay lit when button is released.
CHECK
• “Pilot/Ignition” button not held long enough
to purge air from line.
• Pilot ame not surrounding thermocouple –
clean pilot, see MAINTENANCE.
• Pilot Assembly defective – replace.
• Tip switch wires disconnected – connect
tip switch (check off switch and off switch
wiring).
If Main burner does not ignite.
CHECK
• Main burner orice 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 4 square
inches (example 2” x 2” opening).
• Tip over switch activated from bumping heater.
Re-light
—INTENTIONALLY LEFT BLANK—

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Mr. Heater MH4B | Base Camp MH4BC Operating Instructions and Owner’s Manual
Mr.HeaterMH4B•BaseCampMH4BC

7Operating Instructions and Owner’s ManualMr. Heater MH4B | Base Camp MH4BC
PARTS LIST:
SEE BACK PAGE FOR PARTS ORDERING INFORMATION
NOTES:
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ITEM PART
NO. NUMBER DESCRIPTION
1 15161 Regulator/Valve Assembly 1
2 15151 Orice 1
3 15163 Off Button Wire 1
4 15126 Left Housing 1
5 15128 Right Service Housing 1
6 15122 On Button 1
7 15123 Off Button 1
8 15165 Off Button Spring 1
9 15124 Tank Base 1
10 15157 Reflector Panel 1
11 15158 Reflector Ring 1
12 15162 Wire Guard 1
13 15138 Burner Assembly 1
14 15155 ODS/Pilot Assembly 1
15 15153 Burner Bracket 1
16 15145 Off Switch 1
17 73403 Tipover Switch 1
18 15148 Pilot Fuel Line 1
19 15154 Heat Shield 1

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Mr. Heater MH4B | Base Camp MH4BC Operating Instructions and Owner’s Manual
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.
06/08 15125 Rev. A
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.
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 ofce 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.
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.
MH4B
MODEL MODEL
OPERATING INSTRUCTIONS AND OWNER’S MANUAL
MR. HEATER BASECAMP
MH4BC