Mr. Heater MHVFB10LP User Manual

Installer: Leave this manual with the appliance. Consumer: Retain this manual for future reference.

INSTALLATION INSTrucTIONS ANd OwNer’S MANuAL

Mr. HeATer

MODEL

MHVFB10LP

reAd INSTrucTIONS c AreFuLLY: 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.

UNVENTED LP-GAS FIRED
BUDDY WALL-MOUNT HEATER

Operation Instructions Only
No Parts List

WARNING: If the information in this manual is not followed exactly, a re or explosion may result causing

property damage, personal injury, or loss of life.

- Do not store or use gasoline or other ammable 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

• 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 re department.

- Installation and service must be performed by a qualied installer, service agency, or the gas supplier.

WARNING: This is an unvented gas-red heater. It uses air (oxygen) from the room in which it is installed.
Provisions for adequate combustion and ventilation air must be provided. Refer to Fresh Air for Combustion and
Ventilation section on page 3 of this manual.

WARNING: Improper installation, adjustment, alteration, service or maintenance can cause injury or property
damage. Refer to this manual for correct installation and operational procedures. For assistance or additional
information consult a qualied installer, service agency, or gas supplier.

ENERCO GROUP, INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 · 216-916-3000

Unvented LP-Gas Fired Buddy Wall-Mount Heater

Installation Instructions and Owner’s Manual

1

70586 Rev. B 04/08

This appliance may be installed in an aftermarket* permanently manufactured (mobile) home, where not prohibited
by local codes. This appliance is only for use with the type of gas indicated on the rating plate. This appliance is not
convertible for use with any other gas.

*Aftermarket completion of sale, not for the purpose of resale, from the manufacturer.

WARNINGS

IMPORTANT: Read this owner’s manual carefully

and completely before trying to assemble, operate,
or service this heater. Improper use of this heater
can cause serious injury or death from burns, re,
explosion, electrical shock, and carbon monoxide
poisoning.

WARNING: This appliance is equipped for (natural
or propane) gas. Field conversion is not permitted.

WARNING: Do not use any accessory not ap­proved for use with this heater.

WARNING: Any change to this heater or its con­trols can be dangerous.

• Do not place clothing or other ammable ma-

terial on or near the appliance. Never place
any objects on the heater.

• Due to high temperatures, heater should be

kept out of trafc and away from furniture and
draperies.

• Surface of heater becomes very hot when run-

ning. 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
ammable vapors and liquids.

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 if leaking!

PRECAUTIONS:

WARNING:

1. This heater may be installed in a bedroom, but not a
bathroom, or any place where a strong wind would
shut down the appliance.

2. This heater needs outside ventilation air to run
properly. The Oxygen Depletion Sensor (ODS)

safety shutoff system shuts down the heater if not

enough fresh air is available. See Fresh Air for Com­bustion and Ventilation, page 3.

3. Keep all air openings in heater clear, free of debris
or any blockage. This will insure that enough air for
proper combustion enters the heater.

4. If heater shuts off, do not relight until you provide
fresh, outside air. If heater keeps shutting off, it
requires servicing.

5. Turn off and unplug heater and let cool before servic­ing. Only a qualied service person should service
and repair heater.

6. Do not run heater:

• Where ammable liquids or vapors are used or

stored

• During dusty conditions.

7. Before using furniture polish, 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.

8. Do not use heater if any part has been underwater.
Immediately call a qualied service technician to in­spect the room heater and to replace any part of the
control system and any gas control which has been
underwater.

9. Operating heater above elevations of 4,500 feet
could cause pilot/ODS to shutdown heater.

10. Always run heater with control knob in a locked
position. Never set control 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
u, 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 inu­ence of alcohol, and those at high altitudes.

Propane/LP Gas:

Propoane/LP gas is odorless. An odor making agent
is added to propane/LP gas. The odor helps you detect
a Propane/LP gas leak. However the odor added to
propane/LP gas may be present even though no odor

Unvented LP-Gas Fired Buddy Wall-Mount Heater

Installation Instructions and Owner’s Manual

2

exists. Make certain you read and understand all warn­ings. Keep this manual for reference. It is your guide to
safe and proper operation of this heater.

Product Features

Control Knob

Burner

Grill

Heater
Cabinet

Front Panel

Figure 1

SAFETY DEVICE

This heater has a pilot with an Oxygen Depletion Sen­sor (ODS) safety shut off system. The ODS/pilot shuts
off the heater if there is not enough fresh air.

IGNITION SYSTEM

PIEZO: MHVFB10LP – The heater is 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 ab­sences of local codes, use the latest edition of National
Fuel Gas Code ANSI Z223.1/NFPA 54.

UNPACKING

1. Remove heater from carton.

2. Remove all protective packaging applied to
heater for shipment.

3. Check heater for any shipping damage. If
heater is damaged, promptly inform dealer
where you bought heater.

WARNING: Even though this heater may be

used in enclosures such as ice houses, lodges,
cabins or enclosed porches, fresh air for com­bustion and ventilations requirements apply the
same as below.

FRESH AIR FOR COMBUSTION AND
VENTILATION

WARNING: This heater shall not be installed in a

conned space or unusually tight construction un­less provisions are provided for adequate combus­tion and ventilation air. Read the following instruc­tions to insure proper fresh air for this and other
fuel-burning appliances in your home.

Unvented LP-Gas Fired Buddy Wall-Mount Heater

ESTABLISHING ADEQUATE VENTILATION

The following are excerpts from National Fuel Gas
Code, NFPA 54/ ANSI Z223.1, Section 5.3, Air for Com­bustion and Ventilation. All spaces in homes fall into

one of the three following ventilation classications:

1. Unusually Tight Construction

2. Unconned Space

3. Conned Space

This heater must not be installed in a conned 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 dened 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. Weather stripping has been added on openable win-

dows 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 penetra­tions for plumbing, electrical, and gas lines, and at
other openings.

If you home does not meet all of the three criteria

above, see Determine the Type of Heater Location
Space, page 4.

Conned Space and Unconned Space

The National Fuel Gas Code, NFPA 54/ ANSI Z223.1

denes a conned space as a space whose volume is
less than 50 cubic feet per 1,000 Btu per hour (4.8 m3
per kW) of the aggregate input rating of all appliances
installed in that space, and an unconned space as a
space whose volume is not less than 50 cubic feet per
1,000 Btu per hour (4.8 m3 per kW) of the aggregate
input rating of all appliances installed in that space.
Rooms communicating directly with the space in which
the appliances are installed*, through openings not fur­nished with doors, are considered a part of the uncon­ned space.

*Adjoining rooms are communication only if there
are doorless passageways or ventilation grills be­tween them.

DETERMINING THE TYPE OF HEATER
LOCATION SPACE:

Use this method to determine if you have a conned or
unconned space.

Note: the space includes the room in which you

Installation Instructions and Owner’s Manual

3

install heater plus any adjoining rooms with door­less passageways or ventilation grills between the
rooms.

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

If additional ventilation to adjoining room is supplied
with 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 deter­mine 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 may be

operated is smaller than dened as an unconned
space or if the building is of unusually tight con­struction, provide adequate combustion and ventila­tion air by the methods described in the National

Fuel Gas Code, NFPA 54/ ANSI Z223.1, Section

5.3 or applicable local codes.

3. Add the Btu/hr of all the fuel-burning appliances
in the space such as, Vent–free heater, Gas water
heater, Gas furnace, Vented gas heater, Gas re­place logs, and Other gas appliances*

*Do not include direct-vent gas appliances. Direct­vent 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 =60,000 Btu/hr

4. Compare the maximum Btu/hr the space can support
with the actual amount of Btu/hr used.

Example: 51,800 Btu/hr (maximum Btu/hr the
space can support)

60,000 Btu/hr (Actual amount of Btu/hr
used)

The space in the above example is a conned
space 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. Rework worksheet, and the space of an adjoining

room. If the extra space provides an unconned
space, remove door to adjoining room or add venti­lation grills between the rooms. See Ventilation Air
From Inside Building (Fig. 2)

B. Vent room directly to the outdoors. See Ventilation

Air From Outdoors (Fig. 3).

C. Install a lower Btu/hr heater if lower Btu/hr size

makes room unconned.

If actual Btu/hr used is less than the maximum Btu/

Unvented LP-Gas Fired Buddy Wall-Mount Heater

hr the space can support, the space is an uncon­ned space. You will need no additional fresh air
ventilation.

VENTILATION AIR

Ventilation from Inside Building

This fresh air would come from an adjoining unconned
space. When ventilation to an adjoining unconned
space, you must provide two permanent openings: one
within 12” of the ceiling and one within 12” of the oor
on the wall connecting the two spaces (see options 1
& 2 of g. 2). You can also remove door into adjoin­ing room (see option3, g 2). Follow the National Fuel
Gas Code NFPA 54/ ANSI Z223.1, Section 5.3, Air for
Combustion and Ventilation for required size of ventila­tion grills or ducts.

12”

Ventilation
Gills into
Adjoining
Room ­Option 1

Or remove
door into
Adjoining
Room ­Option 3

Ventilation Gills
into Adjoining
Room - Option 2

12”

Figure 2

WARNING: Rework worksheet, adding the space

of the adjoining unconned space. The combined
space must have enough fresh air to supply all ap­pliance in both spaces.

VENTILATION AIR

OUTLET AIR

OUTLET
AIR

INLET
AIR

VENTILATION CRAWL SPACE

VENTILATED
ATTIC

TO CRAWL
SPACE

Figure 3.

Ventilation from Outdoors

If necessary provide extra fresh air by using ventilation
grills or ducts. Connect these items directly to the out-

Installation Instructions and Owner’s Manual

4

TO ATTIC

doors or spaces open to the outdoors. These include
attics* and crawl spaces. Follow the National Fuel Gas
Code NFPA 54/ ANSI Z223.1, Section 5.3, Air for Com­bustion and Ventilation for required size of ventilation
grills or ducts.

*IMPORTANT: Do not provide openings for inlet or
outlet into attic. If attic has a thermostat-controlled
power vent, heated air entering the attic will activate
the power vent.

IMPORTANT: Vent-free heaters add moisture to the

air. Although this is benecial, installing heater in
rooms without enough ventilation air may cause mil­dew to form from too much moisture. See Fresh Air
for Combustion and Ventilation, pages 3 through 5.

INSTALLATION

NOTICE: This heater 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 qualied 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
not install heater. Call dealer where you bought heater
for proper type heater.

• Where there is easy access for operation,

inspection, and service.

• In the coldest part of the room.

CAUTION: If you install the heater in a home garage:

• Heater pilot and burner must be at least 18

inches above oor .

• Locate heater where moving vehicle will not hit it.

CAUTION: This heater creates warm air currents. These
currents move heat to wall surfaces next to heater. In­stalling heater next to vinyl or cloth wall covering or op­erating heater where impurities (such as tobacco smoke,
aromatic candles, cleaning uids, oil or kerosene lamps,
etc.) are present in the air may discolor walls.

WARNING: Never install the heater:

• In a bathroom.

• In a bedroom

• In a recreational vehicle .

• Where curtains, furniture, clothing, or other

ammable objects are less than 36 inches from
the front, top, or sides of the heater.

• As a replace insert

• In high-trafc areas

• In windy or drafty areas

WARNING: Heater must be mounted to maintain
the minimum clearances shown in Figure 4. If pos­sible, provide greater clearances from the oor, ceil­ing, and joining walls.

FOR PERMANENT INSTALLATION:

Before installing heater, make sure you have the items
listed below:

• Piping (check local codes)

• Sealant (resistant to LP_Gas)

• Equipment shutoff valve*

• Ground joint union

• Test gauge connection*

• Sediment trap

• Tee joint

• Pipe wrench

*A CSA/AGA certied equipment shutoff valve with
1/8” NPT tap is an acceptable alternative to test gauge
connection. Purchase a CSA/AGA certied equipment
shutoff valve from your dealer. See Accessories, page

17.

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.

For convenience and efciency, install the heater:

36” min. from

6” Min from

adjoining

walls

Left
Side

Floor

2” min. to top surface of carpet, tile
or other combustible material

ceiling

Right

Side

Figure 4

FASTENING HEATER TO WALL

Mounting Bracket

The mounting bracket in located on the back panel of
heater (see gure 5). It has been taped there for ship-

Unvented LP-Gas Fired Buddy Wall-Mount Heater

Installation Instructions and Owner’s Manual

5