MrHeater HeatStar MHVFB10LP Quick start guide

Installation instructions and Owner’s Manual
1
ENERCO GROUP, INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 · 216-916-3000
WARNING: If the information in this manual is not followed exactly, a fire or explosion may result causing
propertydamage,personalinjury,orlossoflife.
- Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
-An LPcylinder not connected for use shall not be stored in the vincinity of this or any other appliance.
- WHATTO DO IFYOU SMELLGAS
• Shut off gas supply
• Do not try to light any appliance
• Do not touch an electrical switch; do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
• If you cannot reach your gas supplier, call the fire department.
-Installationandservicemustbeperformedbyaqualifiedinstaller, service agency, or the gas supplier.
WARNING: This is an unvented gas-fired heater. It uses air (oxygen) from the room in which it is installed. Provi-
sionsforadequatecombustionandventilationairmustbeprovided. Refer to FreshAirforCombustion and Ventila-
tion section on page 3 of this manual.
WARNING: Improper installation,adjustment, alteration, service or maintenance can cause injuryorproperty
damage. Refertothismanualforcorrectinstallation and operational procedures. For assistance or additional
informationconsult a qualified installer, service agency, or gas supplier.
70586 04/06
INSTALLATION 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.
Installer: Leave this manual with the appliance. Consumer: Retain this manual for future reference.
MR. HEATER
MODEL
MHVFB10LP
UNVENTED LP-GAS FIRED
BUDDY WALL-MOUNT HEATER

2Installation instructions and Owner’s Manual
Thisappliance may be installed in anaftermarket*permanently manufactured (mobile) home, where not prohibitedby
local codes.This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not
convertiblefor use with any other gas.
*Aftermarketcompletionofsale, not for the purpose of resale, from the manufacturer.
2. Keepall air openings in heater clear, free of debris or
any blockage. This will insure that enough air for
propercombustion enters the heater.
3. Ifheater shuts off, do notrelightuntilyouprovide
fresh, outside air. If heater keeps shutting off, it
requiresservicing.
4. Turnoffandunplug heater andletcool before servic-
ing. Onlya qualified service person should service
andrepairheater.
5. Donot runheater:
•Where flammable liquids or vapors are used or
stored
•Duringdusty conditions.
6. Beforeusing furniturepolish,wax,carpet cleaner or
similar products, turn heater off. If heated the vapors
from these products may create a white powder
residue within burner box or on adjacent walls or
furniture.
7. Donot use heater if any parthas been underwater.
Immediately call a qualified service technician to
inspect the room heater and to replace any part of
the control system and any gas control which has
beenunderwater.
8. Operatingheateraboveelevations of4,500 feetcould
causepilot/ODS to shutdownheater.
9. Always run heater with control knob in a locked
position. Neversetcontrol knob between locked
positions. Poor combustion and higher levels of
carbon monoxide may result if control knob is left
between locked positions.
DANGER: Carbon monoxide poisoning may lead to
death.
Carbon Monoxide Poisoning:
Early signs of carbon monoxide poisoning resemble the
flu, with headaches, dizziness, or nausea. If you have
these signs, the heater may not be working properly.
Get fresh air at once! Have heater serviced. Some
people are more affected by carbon monoxide than
others. These include pregnant women, persons with
heart or lung disease or anemia, those under the
influence of alcohol, and those at high altitudes.
Propane/LP Gas:
Propoane/LP gas is odorless. An odor making agent is
added to propane/LPgas. The odor helps you detect a
Propane/LPgas leak. However the odor added to
propane/LPgas may be present even though no odor
exists. Make certain you read and understand all
warnings. Keep this manual for reference. It is your
guideto safe and proper operation ofthisheater.
WARNINGS
IMPORTANT: Read this owner’s manual carefully
andcompletely before trying to assemble, operate,
orservicethisheater. Improperuse of this heater
can cause serious injury or death from burns, fire,
explosion, electrical shock, and carbon monoxide
poisoning.
WARNING: This appliance is equipped for (natural
or propane) gas. Field conversion is not permited.
WARNING: Do not use any accessory not ap-
proved for use with this heater.
WARNING: Any change to this heater or its controls
can be dangerous.
•Do not place clothing or other flammable
material on or near the appliance. Never
place any objects on the heater.
•Due to high temperatures, heater should be
kept out of traffic and away from furniture and
draperies.
•Surface of heater becomes very hot when
running. Keep children and adults away from
hot surfaces to avoid burns or clothing ignition.
Heater will remain hot for a time after shut-
down. Allow heater surfaces to cool before
handling.
•Young children should be carefully supervised
when they are in the same room with heater.
•Make sure grille guard is in place before
running heater. If screen or grille guard is
removed for servicing it must be replaced prior
to operating the heater.
•Keep the appliance area clear and free from
combustible materials, gasoline, and other
flammablevapors andliquids.
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 rotten egg odor. Do not use
ifleaking!
PRECAUTIONS:
WARNING:
1. Thisheater needsoutsideventilationair to run
properly. The Oxygen Depletion Sensor (ODS)
safety shutoff system shuts down the heater if not
enough fresh air is available. See FreshAir for
CombustionandVentilation, page 3.

Installation instructions and Owner’s Manual
3
Product Features
Figure 1
SAFETY DEVICE
This heater has a pilot with an Oxygen Depletion Sensor
(ODS) safety shut off system. The ODS/pilot shuts off
theheater if there is not enough fresh air.
IGNITION SYSTEM
PIEZO: MHVFB10LP – Theheateris equipped with a
piezo manual ignitor. This system requires no matches,
batteries, or other source to light heater.
LOCAL CODES
Install and use heater with care.
Installation must conform to local codes or in the ab-
sences of local codes, use the latest edition of National
FuelGas CodeANSIZ223.1/NFPA54.
UNPACKING
1. Removeheater fromcarton.
2. Removeall protectivepackagingapplied to
heaterfor shipment.
3. Checkheater for any shipping damage. If heater
isdamaged, promptly inform dealerwhereyou
boughtheater.
WARNING: Even though this heater may be used
in enclosures such as ice houses, lodges, cabins
or enclosed porches, fresh air for combustion
and ventilization requirements apply the same
as below.
FRESH AIR FOR COMBUSTION AND
VENTILATION
WARNING: This heater shall not be installed in a
confined space or unusually tight construction
unless provisions are provided for adequate com-
bustion and ventilation air. Read the following
instructions to insure proper fresh air for this and
other fuel-burning appliances in your home.
ESTABLISHINGADEQUATE VENTILATION
The following are excerpts from National Fuel Gas
Code, NFPA54/ ANSI Z223.1, Section 5.3, Air for
Combustion and Ventilation. All spaces in homes fall
intoone of the three following ventilation classifications:
1. UnusuallyTight Construction
2. UnconfinedSpace
3. ConfinedSpace
This heater must not be installed in a confined space or
unusually tight construction unless provisions are
provided for adequate combustion and ventilation air.
The information on pages 3 through 5 will help you
classify your space and provide adequate ventilation.
Unusually Tight Construction
If your home meets all of the three following criteria you
must provide additional fresh air. See Ventilation Air
from Outdoors, page 5.
Unusually tight construction is defined as construction
where:
a. Walls and ceilings exposed to the outside atmo-
sphere have a continuous water vapor retarder with a
rating of one perm (6 x 10-11 kg per pa-sec-m2) or less
with openings gasketed or sealed and
b. Whether stripping has been added on openable
windows and doors, and
c. Caulking or sealants are applied to areas such as
joints around windows and door frames, between
wall-ceiling joints, between wall panels, at penetra-
tions for plumbing, electrical, and gas lines, and at
other openings.
If you home does not meet all of the three criteria
above, see Determing the Type of Heater Location
Space, page 4.
Confined Space and Unconfined Space
The National Fuel Gas Code, NFPA 54/ ANSI Z223.1
defines a confined space as a space whose volume is
less than 50 cubic feet per 1,000 Btu per hour (4.8 m3
perkW)oftheaggregateinputratingofallappliances
installed in that space, and an unconfined space as a
space whose volume is not less than 50 cubic feet per
1,000 Btu per hour (4.8 m3per kW) of the aggregate
input rating of all appliances installed in that space.
Rooms communicating directly with the space in which
theappliances are installed*, through openings not
furnishedwith doors, are considered a part of the uncon-
finedspace.
*Adjoiningrooms are communication only if there are
doorlesspassageways or ventilationgrillsbetween
them.
DETERMINING THE TYPE OF HEATER
LOCATION SPACE:
Use this method to determine if you have a confined or
unconfined space.
Note: the space includes the room in which you
install heater plus any adjoining rooms with doorless
passageways or ventilation grills between the
rooms.
Control Knob
Grill
Front Panel
Burner
Heater
Cabinet

4Installation instructions and Owner’s Manual
1. Find the volume of the space by multiplying room
length x width x height.
Example: Space size 18ft (length) x 18ft. (width) x 8ft.
(height)= 2592
Ifadditional ventilation to adjoining room issuppliedwith
grills or openings, add the volume of these rooms to the
total volume of the space.
2. Divide the space volume by 50 cubic feet to deter-
mine the maximum Btu/hr the space can support.
Example: 2592 cu.ft. (volume of space) / 50 cu.ft. = 51.8
or 51,800 (maximum Btu/hr the space can
support)
WARNING: If the area in which the heater maybe
operatedis smaller than defined asanunconfined
space or if the building is of unusually tight construc-
tion,provide adequatecombustionand ventilation air
by the methods described in the National Fuel Gas
Code, NFPA 54/ ANSI Z223.1, Section 5.3 or
applicablelocal codes.
3. Addthe Btu/hr ofallthe fuel-burning appliances in the
spacesuch as, Vent–freeheater, Gas water heater,
Gasfurnace, Vented gasheater,Gas fireplace logs,
andOther gas appliances*
*Do not include direct-vent gas appliances. Direct-
vent draws combustion air from the outdoors and
vents to the outdoors.
Example:
Gas water heater 40,000 Btu/hr
Vent Free Heater + 20,000 Btu/hr
Total =60,000Btu/hr
4. Compare the maximum Btu/hr the space can support
with the actual amount of Btu/hr used.
Example: 51,800Btu/hr (maximum Btu/hr the
space can support)
60,000Btu/hr(ActualamountofBtu/hr
used)
Thespaceintheaboveexampleisaconfinedspace
because the actual Btu/hr used is more than the
maximum Btu/hr the space can support.
You must provide additional fresh air. Your options
are as follows:
A. Reworkworksheet, andthe spaceof anadjoining
room. Ifthe extra space provides an unconfined
space,remove door toadjoiningroom or addventila-
tion grills between the rooms. See VentilationAir
FromInside Building (Fig. 2)
B. Vent room directly to the outdoors. See VentilationAir
FromOutdoors (Fig. 3).
C. Install a lower Btu/hr heater if lower Btu/hr size makes
roomunconfined.
If actual Btu/hr used is less than the maximum Btu/
hr the space can support, the space is an uncon-
fined space. You will need no additional fresh air
ventilation.
VENTILATION AIR
Ventilation from Inside Building
Thisfresh air wouldcomefrom an adjoiningunconfined
space. Whenventilation to an adjoining unconfined
space,you must provide two permanent openings:one
within 12” of the ceiling and one within 12” of the floor on
the wall connecting the two spaces (see options 1 & 2 of
fig.2). You can also remove door intoadjoining room
(seeoption3,fig2).FollowtheNational Fuel Gas Code
NFPA54/ANSIZ223.1, Section 5.3,Air for Combustion
andVentilationforrequired size of ventilation grills or
ducts.
Figure 2
WARNING: Rework worksheet,addingthe spaceof
theadjoining unconfined space. Thecombined space
musthaveenoughfreshairtosupply all appliance in
both spaces.
Figure 3.
Ventilation from Outdoors
Ifnecessary provide extra fresh airbyusing ventilation
grills or ducts. Connect these items directly to the
outdoors or spaces open to the outdoors. These include
attics* and crawl spaces. Follow the National Fuel Gas
Ventilation
Gills into
Adjoining
Room -
Option 1
Ventilation Gills into
Adjoining Room -
Option 2
12”
12”
Or remove
door into
Adjoining
Room -
Option 3
INLET
AIR
OUTLET
AIR
VENTILATION CRAWLSPACE
TO CRAWL
SPACE
TO ATTIC
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1
234
5
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1
234
5
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1
234
5
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1
234
5
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1
234
5
12345
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12
12
12
12
12
12
12
12
VENTILATION AIR
VENTILATED
ATTIC
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OUTLET AIR

Installation instructions and Owner’s Manual
5
CodeNFPA54/ANSIZ223.1, Section 5.3,Air for Com-
bustionand Ventilationfor required size of ventilation
grills or ducts.
*IMPORTANT: Donot provide openings for inlet or
outlet into attic. If attic has a thermostat-controlled
powervent, heated air entering the attic will activate
thepower vent.
IMPORTANT: Vent-free heaters add moisture to the
air. Although this is beneficial, installing heater in
roomswithoutenough ventilation air may cause
mildew to form from too much moisture. See Fresh
Airfor Combustion and Ventilation, pages 3 through
5.
INSTALLATION
NOTICE: Thisheater is intended for the use as supple-
mental heat. Use this heater along with your primary
heating system. Do not install this heater as your
primary heat source. If you have a central heating
system, you may run system’s circulating blower while
using heater. This will help circulate the heat throughout
the house. In the event of a power outage, you can use
this heater as your primary heat source for the duration
of the outage.
WARNING: A qualified service person must install
heater. Follow all local codes.
CHECK GAS TYPE
Use only LP-gas. If your gas supply is not LP-gas, do
notinstall heater. Call dealer where youboughtheater
forproper typeheater.
FOR PERMANENT INSTALLATION:
Beforeinstallingheater,make sure you have the items
listedbelow:
•Piping (check local codes)
•Sealant(resistanttoLP_Gas)
•Equipmentshutoffvalve*
•Groundjoint union
•Testgauge connection*
•Sedimenttrap
•Teejoint
•Pipewrench
*ACSA/AGA certifiedequipmentshutoff valve with1/8”
NPT tap is an acceptable alternative to test gauge
connection. Purchasea CSA/AGA certified equipment
shutoffvalvefrom your dealer.SeeAccessories,page17.
This heater may also be installed with the hose and
regulator assembly included with heater.
LOCATING HEATER
This heater is designed to be mounted on the wall.
Forconvenience and efficiency,install the heater:
•Where there is easy access for operation,
inspection,and service.
•In the coldest part of the room.
CAUTION: Ifyou install the heater in a home garage:
•Heater pilot and burner must be at least 18
inchesabovefloor.
•Locateheater where moving vehicle will not hit it.
CAUTION: Thisheater creates warmaircurrents. These
currents move heat to wall surfaces next to heater. In-
stallingheater next to vinyl orclothwall covering or oper-
ating heater where impurities (such as tobacco smoke,
aromaticcandles, cleaning fluids, oil or kerosene lamps,
etc.) are present in the air may discolor walls.
WARNING: Neverinstallthe heater:
• Ina bathroom.
• Inabedroom
• Ina recreationalvehicle.
•Wherecurtains, furniture, clothing, or other
flammable objects are less than 36 inches from
the front, top, or sides of the heater.
• As a fireplace insert
• Inhigh-trafficareas
• Inwindy or drafty areas
WARNING: Heatermust be mounted to maintain the
minimumclearances shown in Figure 4. If possible,
providegreater clearances fromthefloor,ceiling,and
joiningwalls.
Figure 4
FASTENING HEATER TO WALL
Mounting Bracket
The mounting bracket in located on the back panel of
heater(see figure 5). It has been taped there for shipping.
Removemounting bracket frombackpanel.
Left
Side Right
Side
36” min. from
ceiling
6” Min from
adjoining
walls
2” min. to top surface of carpet,
tile or other combustible material
Floor

6Installation instructions and Owner’s Manual
Figure 5
Removing Front Panel of Heater
1. Removethree screws on bottomfrontof front
panel.
2. Pullbottom of front panelforward,then down
(seefigure 6)
Figure 6
Attaching Mounting Bracket to Wall
Use holes on each end of mounting bracket to attach
bracket to wall. These holes are 16 inches apart. Attach
mounting bracket to wall in one of two following ways.
1. Attach to wall studs
2. Attach to wall anchor
Attaching to Wall Stud:
This way is the best providing the strongest mounting in
woodframe houses.
Attaching to WallAnchor:
This way allows you to attach mounting bracket to hollow
walls (wall areas between studs) or to solid walls (con-
creteor masonry).
Decide which way best suits your needs. Either method
willprovide a secure hold for the mounting bracket.
1. Tape mounting brackettowallwhere heater will
be located. Make sure mounting bracket is level.
For wall stud mounting locate one end of the
mountingbracket over a wall stud.
WARNING: Maintainminimum clearances
shownin figure 7. If you can, provide greater
clearancesfrom the floor and joining wall.
2. Mark screw locations on wall (see figure 7).
3. Removetape and mount bracketfromwall.
Figure 7
Attaching to Wall Stud:
For attaching mounting bracket to wall studs
1. Drill holes at marked locations using 9/64” drill
bit.
2. Place mounting bracket onto wall. Line up holes
on each end of bracket with hole drilled in wall.
3. Insertmounting screws through bracket and into
wall studs.
4. Tighten screws until mounting bracket is firmly
fastened to wall studs.
Attaching to Wall usingAnchor:
Forattachingmountingbracket to hollow walls (wall
areasbetween studs) or solid walls (concrete orma-
sonry)
Note: Wall anchors, mounting screws, and spacer
arein hardware package. The hardwarepackageis
providedwithheater.
1. Drill holes at marked locations using 5/16” drill
bit. For solid walls (concrete or masonry), drill
at least 1” deep.
2. Foldwall anchor as shown in figure 8 below.
Figure 8.
3. Insertwall anchor (wings first) into hole.Tap
anchorflushtowall.
4. For thin walls (1/2” or less) insert red key into
wallanchor.
5. Place mounting bracket onto wall. Line up holes
on each end of bracket with wall anchors.
6. Insertmounting screws through bracket and into
wallanchors.
7. Tighten screws until mounting bracket is firmly
fastenedto wall.
Placing Heater on Mounting Bracket
Mounting
Bracket
Adjoining Wall
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17-1/2” Min.
6-1/2” Min. 10,000 BTU
12-9/64” (Sm)
Mark mounting hole locations
and drill holes where indicated.
Allow for minimum clearances

Installation instructions and Owner’s Manual
7
1. Locate two horizontal slots on back pane of
heater(see figure19).
2. Placeheater ontomountingbracket. Slide
horizontal slots onto stand-out tabs on mounting
bracket.
Figure 9
Installing Bottom Mounting Screws
1. Locatetwo bottom mounting screw holes. These
holesarenear bottom on back panel of heater
(seefigure 9).
2. Mark screws locations on wall.
3. Removeheater frommounting bracket.
4. Ifinstalling bottom mounting screw into hollow or
solid wall, install wall anchors. Follow steps 1
through 4 underAttaching to Wall usingAnchor.
Ifinstalling bottom mounting screw into wall
stud, drill holes at marked locations using 9/64”
drill bit.
5. Re-placeheater onto mounting bracket.
6. Placespacers between bottom mounting holes
andwall anchor or drilled hole.
7. Hold spacer in place with one hand. With the
otherhand, insert mounting screw through
bottom mounting hole and spacer. Place tip of
screwin opening of wall anchor or drilled hole.
8. Tighten both screws until heater is firmly se-
curedtowall.Donotovertighten.
Note: Do not re-place front panel at this time. Re-
placefront panel after making gas connections and
checking for leaks.
CONNECTING TO GAS SUPPLYFOR
PERMANENT INSTALLATION
WARNING:Aqualifiedservice personmustconnect
heater to gas supply. Follow all local codes.
WARNING: Thisappliance requires a3/8”NPT
(NationalPipe Thread) inlet connection to the
pressureregulator.
CAUTION: Neverconnect heater directly to thePropane
supply. This heater requires an external regulator (not
supplied).Installtheexternalregulatorbetweentheheater
andPropane/LPsupply.
Theinstallermust supply an external regulator. The
externalregulator will reduce the incoming gas pressure
to between 11 and 14 inches of water. If you do not
reduceincoming gas pressureheater regulator damage
couldoccur. Installexternal regulator with the vent
pointing down as shown in Figure 12. Pointing the vent
down protects it from freezing rain or sleet.
CAUTION: Use only new black iron or steel pipe.
Internally-tinnedcopper tubing may be used in certain
areas. Check your local codes. Use pipe of larger
enoughdiameter to allow propergas volume to heater.If
pipe is too small, undue loss of pressure will occur.
Installationmust include anequipmentshutoff valve,
unionandplugged1/8” NPT tap. Locate NPT tap within
reach of test gauge hookup. NPT tap must be upstream
fromheater (seefigure12).
Figure 12
*ACSA/AGA certifiedequipmentshutoff valve with1/8”
NPT tap is an acceptable alternative to test gauge
connection. Purchasethe CSA/AGA certified equipment
shutoffvalve from your dealer. SeeAccessories,page
17.
IMPORTANT: Installanequipment shutoffvalve inan
accessiblelocation. The equipment shutoffvalve is for
turning on or shutting off the gas to the appliance.
Apply pipe joint sealant lightly to male threads. This will
prevent excess sealant from going into pipe. Excess
sealant in pipe could result in clogged heater fuel train.
CAUTION: Use pipe joint sealant that is resistant to
LP-Gas.
Install sediment trap in supply line as shown in figure 12.
Locate sediment trap where it is within reach for clean-
ing. Asediment trap traps moisture and contaminants.
Thiskeepsthem from going into heater.If sediment trap
is not installed or is installed improperly, heater may not
Horizontal Slots
Mounting Bracket
mounted to wall
Pressure
Regulator
Heater
Cabinet
Ground Joint
Union Equipment
Shutoff Valve
From Gas Meter
(4” W.C. to 10.5”
W.C. Pressure)
Tee Joint
1/8” NPT Plug Tap
Cap
Pipe Nipple
Tee Joint
3/8” NPT Pipe Nipple
Sediment
Trap
Test Gauge
Connection
Reducer Bushing
to 1/8” NPT
3” Minimum
Mounting Screws

8Installation instructions and Owner’s Manual
runcorrectly.
IMPORTANT:Hold pressureregulator with wrenchwhen
connecting it to gas piping and/or fittings.
CHECKING GAS CONNECTIONS
WARNING: Testallgas piping and connections for
leaks after installing or servicing. Correct all leaks
at once.
WARNING: Never use an open flame to check for a
gas leak.Apply a mixture of liquid soap and water to
all joints. Bubbles forming show a leak. Correct all
leaks at once.
PRESSURE TESTING GAS SUPPLY PIPING
SYSTEM
Test pressure in Excess of ½ psig (3.5kPa)
1. Disconnect appliance with its appliance main
gas valve (control valve) and equipment shutoff
valve from gas supply piping system. Pres-
sures in excess of ½ psig will damage heater
regulator.
2. Cap off open end of gas pipe where equipment
shutoff valve was connected.
3. Pressurize supply piping system by either using
compressed air or opening main gas valve on
or near gas meter.
4. Check all connections and joints in gas supply
piping system.Apply mixture of liquid soap and
water to gas joints. Bubbles forming show a
leak.
5. Correct all leaks at once.
6. Depressurize and relieve pressure in supply
piping system.
7. Reconnect heater and equipment shutoff valve
to gas supply.
8. Reconnected fittings must be checked for leaks
in next section.
Test Pressure Equal To or Less Than ½ psig (3.5 kPa)
1. Close equipment shutoff valve (see figure 13).
2. Pressurize supply piping system by either using
compressed air or opening propne/LP supply
valve.
3. Check all joints from the propane/LP supply
valve to equipment shutoff valve (see figure 14).
Apply mixture of liquid soap and water to gas
joints. Bubbles forming show a leak.
4. Correct all leaks at once.
5. Depressurizeand relievepressurefrom supply
piping system.
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 assembly supplied.
•DANGER: NEVER bring a refillable propane cylinder
indoors. A fire 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
assembly supplied (see parts list).
•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 five-position Control Knob is in “OFF”
position.
•Screw hose connector into regulator on heater and screw
connector on other end of hose into a regulated LP-gas
supply cylinder valve. Tighten all hose connections.
•Open valve at LP-gas supply cylinder.
•Check all hose connections for leaks with soapy water at
the threaded connection on heater where the hose
connector screws into the regulator and at LP-gas supply
cylinder.
Pressure Testing Heater Gas Connections:
1. Make sure that the heater supply piping system
is connected and has been leak tested as
describedabove.
2. Make sure control knob of heater is in OFF
position.
3. Openequipment shutoffvalve (seefigure 13).
4. Openpropane/LP supplyvalve.
5. Checkall joints from equipmentshutoffvalve to
control valve (see figure 14).Apply mixture of
liquid soap and water to gas joints. Bubbles
forming show a leak.
6. Correct all leaks at once.
7. Lightheater (seeOperatingYour Heater,pages
11 and 12 for thermostat models or pages 9 and
10fornon-thermostatmodels). Check the rest of
the internal joints for leaks.
8. Turn off heater (see To Turn OFFGas to Appli-
ance,page12for thermostat models and page
11for non-thermostatmodels).
9. Replacelower frontpanel.

Installation instructions and Owner’s Manual
9
Figure 13
Figure 14
FORYOUR SAFETYREAD BEFORE LIGHTING
WARNING: If you do not follow these instructions
exactly, a fire or explosion may result causing
propertydamage, personal injury or loss of life.
A. This appliance has a pilot that must be lighted
by hand. When lighting the pilot, follow these
instructions exactly.
B. BEFORELIGHTING smellallaround the appli-
ance area for gas. Be sure to smell next to the
floorbecause some gas is heavier than air and
will settle on the floor.
WHATTO DO IF YOU SMELL GAS
•Do not try to light any appliance.
•Do not touch any electrical switch; do not use
anyphone in your building.
•Immediately call you gas supplier from a
neighbor’sphone. Follow the gas supplier’s
instructions.
•If you can not reach your gas supplier, call the
firedepartment.
C. Use only your hand to push in or turn the gas
control knob. Never use tools. It knob will not
push in or turn by hand, don’t try to repair it; call
aqualified service technician or gas supplier.
Force or attempted repair may result in a fire or
explosion.
D. Do not use this appliance if any part has been
underwater. Immediately call a qualified service
technician to inspect the appliance and to
replace any part of the control system which
has been underwater.
LIGHTING INSTRUCTIONS
1. STOP! Readthe all safety information included
with and on the side of heater.
2. Check that gas supply to heater is on.
3. Push in gas control knob and slightly turn
clockwise to the OFF position (see figure 16).
Note: Knobcannot be turned from PILOT to OFF
unless knob is pushed in slightly. Do not force.
4. Wait five (5) minutes. Then smell for gas,
including near the floor. If you smell gas, STOP!
Follow“B” in the safety information above. If you
do not smell gas, go to the next step.
5. Push in gas control know slightly and turn
counterclockwise to PILOT/IGN and depress for
five (5) seconds.
Note: The first time that the heater is operated after
connecting the gas supply, the control knob should
be depressed for about 30 seconds. This will allow
air to bleed from the gas system.
6. Push in control knob and rotate control knob
back to OFF position then rotate counterclock-
wise to PILOT/IGN position. This will light pilot.
Ifneededgently keep rotating control knob back
andforth while depressed until pilot lights.
7. Keepcontrol knob depressed in for ten (10)
seconds after lighting pilot. If pilot goes out,
repeat steps 4, 5, 6 and 7.
• If pilot does not stay lit, refer to Troubleshooting,
pages 14 & 15. Also, contact a qualified service
person or gas supplier for repairs.
•Ifcontrol knob does not pop up when released,
contact a qualified service person or gas
supplierfor repairs.
•When the pilot is lit, turn the control knob to “HI”
position to light heater.
•After flameis established (see BurnerFlame
Pattern, Pages 12 and 13) on “HI”, adjust heat
output by turning control knob to desired position
(“LO”or “HI”).Donot operateheaterbetween
locked positions.
Equipment
Shutoff Valve
Open
Closed
Gas Meter
Control Valve
Equipment
Shutoff Valve

10 Installation instructions and Owner’s Manual
Figure 16
CAUTION: Do not try to adjust heating level by using
equipmentshutoffvalve.
WARNING: When running heater, set control knobat
“LO” or “HI” locked positions. Poor combustion and
higherlevels of carbon monoxide may result ifheater
isoperated with control knob positioned between
locked positions.
IMPORTANT: Releasedownward pressurewhileturning
control knob. Control knob must be locked at the
desiredposition.
TO TURN OFF GAS TO APPLIANCE
SHUTTINGOFFHEATER:
1. Turn control knob clockwise to the OFF position.
2. Turnoffequipmentshutoffvalve.
SHUTTINGOFFBURNER ONLY(PILOTSTAYSLIT)
1. Turncontrol knob clockwise to the PILOT/IGN
position.
INSPECTING BURNER
Checkpilot flame pattern and burner flamepatternoften.
PILOT FLAME PATTERN
Figure 21 show a correct pilot flame pattern. Figure 22
shows an incorrect pilot flame pattern. The incorrect
pilot flame pattern is not touching thermocouple. This
will cause the thermocouple to cool. When the thermo-
couple cools, the heater will shut down. If pilot flame
pattern is incorrect, as shown in Figure 22:
•Turn heater off (see To Turn OFF Gas toAppli-
ance,page11for non-thermostatmodels).
•SeeTroubleshooting, pages 14and15.
Figure 22
BURNERFLAME PATTERN
Figure23 show a correct burner flame pattern. Figure 24
showsan incorrect burner flame pattern. If burnerflame
pattern is incorrect, as shown in Figure 24:
•Turnheater off (seeToTurn OFF Gas toAppli-
ance,page 11fornon-thermostatmodels).
•SeeTroubleshooting, pages 14and15.
Figure 23
Figure 24
CLEANING AND MAINTENANCE
WARNING: Turn offheaterand let coolbefore
servicing.
CAUTION:Youmust keep control areas, burner and
circulation air passageways of heater clean. Inspect
theseareas of heater beforeuse. Have the heater
inspectedyearly by a qualified service person. Heater
may need more frequent cleaning due to excess lent
fromcarpeting, bedding material, pet hair,etc.
Control Knob
Figure 17
1/2 Steel Panel
Height
1/2 Steel Panel
Height

Installation instructions and Owner’s Manual
11
Makesure grille guard is in place before running heater.
Ifscreen or grille guard is removed for servicing it must
bereplaced prior to operating theheater.
WARNING: Failure to keep the primary air
opening(s)of the burner(s) clean may result in
sootingand property damage.
CLEANINGODS/PILOTAND BURNER
•Useasvacuumcleaner, pressurized air or small
soft bristled brush to clean.
CLEANINGBURNER PILOTAIR HOLEINLET
Werecommend that you clean the unit ever 2,500 hours
ofoperation or every three months. We also recommend
that you keep the burner tube and pilot assembly clean
and free of dust and dirt. To clean these parts we
recommendusing compressed air no greater than 30
psig.
This can be done by using a vacuum cleaner in the blow
position, using compressed air in a can, please follow
the directions on the can. If you don’t follow directions
on the can you could damage the burner or pilot assem-
bly. In addition, the directions that follow should also be
followed.
1. Shut off the unit, including the pilot. Allow the
unit to cool for at least thirty minutes.
2. Inspectburner and pilot for dust and dirt.
3. Blow air through the port/slots and holes in the
burner.
A yellow tip on the pilot flame indicates dust and dirt in
the pilot assembly. To clean the pilot assembly find the
small pilot air inlet hole about two inches from where the
pilot flame comes out of the pilot assembly (see PilotAir
Inlet Hole in figure 25). With the unit off, lightly blow air
through the air inlet hole. You may blow through a
drinkingstraw if compressed air is not available.
Figure 25
CLEANINGHEATERCABINET
Airpassageways
•Useavacuum cleaner or pressurized air to clean
Exterior
•Use a soft cloth dampened with a mild soap and
water mixture. Wipe the cabinet to remove dust.
SPECIFICATIONS
MHVFB10LP
BTU(Available) 10,000
Type of Gas LP-Gas Only
Ignition Piezo
Pressure Regulator Setting 10 Inches of
Water
Inlet Gas Pressure (Maximum) 14 Inches of
Water
Inlet Gas Pressure (Minimum) 11 Inches of
Water
Burners / Orifice nozzles 1
Thermostatic Control No
Clearances: inches (mm)
Top 36 (915)
Sides 6 (152)
Floor (min. to top of carpet) 2 (51)
Fabric / flammable objects 36 (915)

12 Installation instructions and Owner’s Manual
TROUBLESHOOTING
NOTE:All troubleshooting items are listed in order of operation and likely occurrence.
WARNING: Only aqualified service person shouldservice and repairheater.
CAUTION: Neveruseawireneedle,orsimilarobjectto clean ODS/pilot. This can damage ODS/pilot unit.
Makesuregrilleguardisinplacebeforerunningheater. If screen or grille guard is removed for servicing it must be
replacedprior to operating theheater.
OBSERVEDSYMPTOM POSSIBLE CAUSE REMEDY
1. Ignitor electrode positioned wrong.
2. ignitor electrode is broken.
3. Ignitor electrode not connected to
ignitor.
4. Ignitor cable pinched or wet.
5. Broken ignitor cable.
6. Bad Piezo ignitor.
1. Gas supply turned off or equipment
shutoff valve closed.
2. Air in gas line when installed.
3. ODS/pilot is clogged.
4. Gas regulator setting is not correct
5. Control knob not in pilot position
1. Control knob not fully pressed in.
2. Control knob not presed in long enough
3. Equipment shutoff valve not fully open
4. Thermocouple connection loose at
control valve
5. Pilot flame not touching thermocouple,
which allows thermocouple to cool,
causing pilot flame to go out. This
problem could be caused by one or both
of the following:
a. Low gas presure
b. Dirty or partially clogged ODS/pilot
6. Thermocouple damaged
7. Control valve damaged
1. Burner orifice is clogged
2. Burner orifice diameter to small
3. Inlet gas pressure is too low
1. Manifold pressure is too low
2. Burner orifice is clogged
When Piezo ignitor knob is
turned, there is no spark at
pilot
ODS/pilot lights but flame
goes out when control knob is
released
When Piezo ignitor knob is
turned, there is a spark at the
ODS/pilot but no ignition
Burner does not light after
ODS/pilot is lit
1. Reposition electrode
2. Replace electrode
3. Reconnect ignitor cable
4. Free ignitor cable if pinched by any metal
or tubing. Keep ignitor cable dry.
5. Replace ignitor cable
6. Replace control valve (Piezo is part of
control valve on 10K units).
1. Turn on gas supply or open equipment
shutoff valve.
2. Continue holding down control knob.
Repeat ignition operation until air is
removed.
3. Clean ODS/pilot (see Cleaning and
Maintenance page 13).
4. Replace gas regulator
5. Turn Control knob to pilot position
1. Press in control knob fully
2. After ODS/pilot lights, keep control knob
pressed in for 30 seconds
3. Fully open equipment shutoff valve
4. Hand tighten thermocouple nut until snug,
and then tighten 1/4 turn more.
5. -
a. Contact local gas company
b. Clean ODS/pilot (see Cleaning and
Maintenance, page 13).
6. Replace thermocouple
7. Replace Control valve.
1. Clean burner orifice (see Cleaning and
Maintenance on page 13), or replace
burner orifice
2. Replace burner orifice
3. Contact local gas company
1. Contact local gas company
2. Clean burner orifice (see Cleaning and
Maintenance on page 13), or replace
burner orifice
Delayed ignition of burner

Installation instructions and Owner’s Manual
13
TROUBLESHOOTING
WARNING: If you smell gas:
•Shut off gas supply
•Do not try to light any appliance
•Do not touch any electrical switch; do not use any phone in your building
•Immediately call you gas supplier from a neighbor’s phone. Follow the gas supplier’s instructions.
•If you cannot reach your gas supplier, call the fire department.
IMPORTANT: Operating heater where impurities in air exist may create odors. Cleaning supplies, paint, paint remover,
cigarette smoke, cements and glues, new carpet or textiles, etc., create fumes. These fumes may mix with combustion
air and create odors and possible discoloration of walls and ceilings.
OBSERVED SYMPTOM POSSIBLE CAUSE REMEDY
TROUBLESHOOTING CON’T
Slight smoke or odor during
initial operation
Heater produces a whistling
noise when burner is lit
Burner backfiring during
operation 1. Burner orifice is clogged or damaged
2. Burner damaged
3. Gas regulator defective
1. Residues from manufacturing process
1. Turning control knob to HI position when
burner is cold
2. Air in gas line
3. Air passageways on heater blocked
4. Dirty or partially clogged burner orifice.
1. When heated, vapors from furniture polis,
wax, carpe cleaners, etc., turn into white
powder residue
OBSERVED SYMPTOM POSSIBLE CAUSE REMEDY
1. Clean burner orifice (see Cleaning and
Maintenance on page 13), or replace
burner orifice
2. Replace burner
3. Replace gas regulator
1. Problem will stop after a few hours of
operation
1. Turn control knob to LO position and let
warm up for a minute.
2. Operate buner until air is removed from
line have gas line checked by local gas
company.
3. Observe minimum installation
clearances(see Figure 4 page6)
4. Clean burner orifice (see Cleaning and
Maintenance on page 13), or replace
burner orifice.
1. Turn heater off when using furniture
polish,wax, carpet cleaner or similar
products.
White powder residue forming
within burner box or on
adjacent walls or furniture
1. Heater burning vapors from paint, hair
spray, glues, etc. See IMPORTANT
statement above
2. Gas leak. See WARNING statement at
top of page.
1. Not enough fresh air is available
2. Low line pressure
3. ODS/pilot is partially clogged
1. Gas leak. See WARNING statement at
top of page
2. Control valve is defective
1. Foreign matter between control valve and
burner
2. Gas leak. See WARNING statement at
top of page
1. Metal expanding while heating or contract-
ing while cooling
1. Not enough combustion/venitlation air
1. Ventilate room. Stop using odor-causing
products while heater is running.
2. Locate and correct all leaks (see Checking
Gas Connections, page 8)
1. Open window and/or door for ventilation
2. Contact local gas company
3. Clean ODS/pilot (see Cleaning and
Maintenance, page 11)
1. Locate and correct all leaks (see Checking
Gas Connections, page 8)
2. Replace control valve
1. Take apart gas tubing and remove foreign
matter
2. Locate and correct all leaks (see Check-
ing Gas Connections, page 8)
1. This is common with most heaters. If noise
is excessive, contact qualified service
person
1. Refer to Fresh Air of Combustion and
Ventilation page 3 through 5.
Heater produces unwanted
odors.
Heater shuts off in use (ODS
operates)
Gas odor even when control
knob is in OFF position
Gas odor during combustion
Heater produces a cliking/
ticking noise just after burner
is lit or shut off
Moisture/condensation noticed
on windows

14 Installation instructions and Owner’s Manual
REPLACEMENT PARTS
Note: use only original replacement parts. This will
protect you warranty coverage for parts replaced
under warranty.
PARTS UNDER WARRANTY
Contact authorized dealer from whom you pur-
chased this product. If they are unable to supply
original replacement part(s), call the number on
back of manual. When contacting your dealer have
ready:
•Your name
•Your address
•Modeland serial numbers of your heater
•Howheater wasmalfunctioning
•Type of gasused(propane/LP)
•Purchasedate
Usually, we will ask you to return the defective part
to the factory.
PARTS NOT UNDER WARRANTY
Contact authorized dealer of this product. If they
can’t supply original replacement part(s), call
Enerco Group, Inc.’s 800# on the back of this
manual.
TECHNICAL SERVICE
You may have further questions about installation,
operation, or troubleshooting, if so, contact Enerco
Group, Inc.’s 800# on the back of this manual.
ACCESSORIES
Purchase these heater accessories from your local
dealer. If they can not supply these accessories,
contact your nearest Parts Central or call Enerco
Group, Inc.’s 800# for information. You can also
write to the address listed on the front page of this
manual.
Equipment Shutoff Valve
For all models, Equipment shutoff valve with 1/8”
NPT tap.
PARTS LIST
Non-Thermostat model
MHVFB10LP
This list contains replacement parts used in your
heater. When ordering parts, follow the instructions
listed under Replacement Parts on page 17 of this
manual.
MHVFB10LP
UNVENTED LP-GAS FIRED
BUDDY WALL-MOUNT HEATER
33-1
22-1
1-1
3
26
78
23
13
1-4
1-2
1-3
6
15
14
42
5
22-3
22-2
20-2
16-2
16-1
16
2
20-1
27-2 4
43
44
45
46
47

Installation instructions and Owner’s Manual
15
ITEM PART NO. DESCRIPTION QTY.
MHVFB10LP
1 70300 Cabinet assembly 1
1-1 70595 Cabinet Top Panel 1
1-2 70592 Cabinet Right Panel 1
1-3 70593 Cabinet back Panel 1
1-4 70591 Cabinet Left Panel 1
2 70594 Lower Front panel assembly 1
3 70312 Reflector Assembly 1
4 70319 Burner Assembly 1
5 70320 Wall Mounting Bracket 1
6 70321 Valve Mounting bracket 1
7 70322 Bezel – Reflector Front 1
8 70324 Valve / Piezo Assembly 1
13 70357 Pressure regulator 1
14 70370 Steel Panel 1
15 70327 Glass Mounting Bracket 1
16 70366 ODS / Pilot Assembly 1
16-1 part of #16 Thermocouple **
16-2 part of #16 Ignition Electrode **
20-1 70654 Burner Mounting Bracket - Right 1
20-2 70599 Burner Mounting Bracket - Left 1
22-1 70328 Heat Shield – Top 1
22-2 70329 Heat Shield – Right 1
22-3 70331 Heat Shield – Back 1
23 70663 Regulator Mounting Bracket 1
24 70665 Floor mount feet 2
26 70332 Grill guard 1
27-2 70364 Orifice, 10, BF 1
33-1 70335 Heat Shield - Left 1
42 70337 Control Valve Knob 1
43 70589 1/4” SAE Flare x 3/8” MPT 1
44 21590 Hose 1
45 26285 Gas Regulator 1
46 70597 3/8” FPT X 3/8” MPTStreet Elbow 1
47 70587 1/4” FPT X 3/8” MPT Reducer Bushing 1
* 70588 Operator’s Manual 1
* 70586 Rating Label 1
* 70354 ODS Gas Tube Assembly 1
* 70355 Regulator to Thermostat Valve tube Ass’y 1
* 70342 * Hardware kit 1
* 70348 * CSA label 1
* 70349 * Gas Instruction decal 1
* 70350 * Inside warning label 1
* Item Not Shown
** Must purchase assembly
UNVENTED LP-GAS FIRED
BUDDY WALL-MOUNT HEATER

16 Installation instructions and Owner’s Manual
ENERCO GROUP, INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135
216-881-5500 Toll Free Number 1-800-251-0001
www.mrheater.com
Mr. Heater is a registered trademarks of Enerco Group, Inc.
© 2005, Enerco/Mr. Heater. All rights reserved ANSIZ21.11.2b-2004
WARRANTYINFORMATION
Keepthis warranty
Model______________________
SerialNo. ___________________
Date Purchased _______________
Always specify model and serial numbers when communication with the factory.
We reserve the right to amend these specifications at any time without notice. The only warranty applicable
is our standard written warranty. We make no other warranty, expressed or implied.
Enerco Group, Inc. warrants this product to be free from defects in materials and components for two (2)
years from the date of first purchase, provided that the product has been properly installed, operated and
maintained in accordance with all applicable instructions. To make a claim under this warranty the Bill of
Sale or cancelled check must be presented.
The warranty is extended only to the original retail purchaser. This warranty covers the cost of part(s)
required to restore the heater to proper operating condition and an allowance for labor when provided by an
Enerco Group, Inc.Authorized Service Center. Warranty part(s) MUST be obtained through authorized
dealers of this product and/or Enerco Group, Inc. who will provide original factory replacement parts. Failure
to use original factory parts voids this warranty. The heater MUST be installed by a qualified installer in
accordance with all local codes and instructions furnished with the unit.
This warranty does not apply to parts that are not in original condition because of normal wear and tear of
parts that fail or become damaged as a result of misuse, accidents, lack of proper maintenance or defects
caused by improper installation. Travel, diagnostic cost, labor, transportation and any and all such costs
related to repairing a defective heater will be the responsibility of the owner.
TOTHE FULL EXTENTALLOWED BY THE LAW OF THE JURISDICTION THAT GOVERNS THE SALE
OF THE PRODUCT; THIS EXPRESS WARRANTY EXCLUDESANYANDALL OTHER EXPRESSED
WARRANTIESAND LIMITSTHEDURATION OFANYANDALLIMPLIED WARRANTIESOF MERCHANT-
ABILITYAND FITNESS FORAPARTICULAR PURPOSE, TO TWO (2) YEARS OFALL COMPONENTS
FROM THE FIRSTDATE OF PURCHASE;AND ENERCO GROUP, INC.’S LIABILITY IS HEREBY LIMITED
TO THE PURCHASE PRICE OF THE PRODUCTAND ENERCO GROUP, INC. SHALL NOT BE LIABLE
FORANYOTHER DAMAGESWHATSOEVER INCLUDING INDIRECT, INCIDENTALORCONSEQUEN-
TIALDAMAGES.
Some states do not allow a limitation on how long an implied warranty lasts or an exclusion or limitation on
incidental or consequential damages, so the above limitation on implied warranties, or limitation on dam-
ages, may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights that very from state to
state. Always specify model and serial number when communication with the factory.