Enerco MHVFB10LPI 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
MHVFB10LPI
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.
UNVENTED LP-GAS FIRED
BUDDY WALL-MOUNT HEATER
Starting Serial #MHC-705150009269
WARNING: 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.
- 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 vincinity 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 fire department.
- Installation and service must be performed by a qualified installer, service agency, or the gas supplier.
WARNING: This is an unvented gas-fired heater. It uses air (oxygen) from the
sions 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 qualified installer, service agency, or gas supplier.
ENERCO GROUP, INC., 4560 W. 160TH ST., CLEVELAND, OHIO 44135 · 216-916-3000
Installation instructions and Owner’s Manual
1
room in which it is installed. Provi-
70586 05/10 Rev B
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, 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 approved 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
Heater will remain hot for a time after shutdown. Allow heater surfaces to cool before
handling.
or clothing ignition.
• 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
flammable vapors and liquids.
Every time the hose 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 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.
2. 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.
3. If heater shuts off, do not relight until you provide
fresh, outside air. If heater keeps shutting off, it
requires servicing.
4. Turn off and unplug heater and let cool before servicing. Only a qualified service person should service
and repair heater.
5. Do not run heater:
• Where flammable liquids or vapors are used or
stored
• During dusty conditions.
6. 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
furniture.
7. Do not use heater if any part has 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
been underwater.
8. Operating heater above elevations of 4,500 feet could
cause pilot/ODS to shutdown heater.
9. 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
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:
Propane/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
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.
within burner box or on adjacent walls or
2 Installation instructions and Owner’s Manual
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 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 combustion and ventilation air. Read the following
instructions to insure proper fresh air for this and
other fuel-burning appliances in your home.
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 classifications:
1. Unusually Tight Construction
2. Unconfined Space
3. Confined Space
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 4.
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
-11
rating of one perm (6 x 10
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 penetrations 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 3.
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 m
3
per kW) of the aggregate input rating of all appliances
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 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 unconfined 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 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.
Installation instructions and Owner’s Manual
3
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 defined as an unconfined
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 fireplace 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 confined 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 unconfined
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 unconfined.
If actual Btu/hr used is less than the maximum Btu/
hr the space can support, the space is an unconfined space. You will need no additional fresh air
ventilation.
VENTILATION AIR
Ventilation from Inside Building
This fresh air would come from an adjoining unconfined
space. When ventilation 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 into adjoining room
(see option3, fig 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
Grills into
Adjoining
Room Option 1
Or remove
door into
Adjoining
Room Option 3
Ventilation Grills into
Adjoining Room Option 2
12”
Figure 2
WARNING: Rework worksheet, adding the space of
the adjoining unconfined 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 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
outdoors or spaces open to the outdoors. These include
attics* and crawl spaces. Follow the National Fuel Gas
4 Installation instructions and Owner’s Manual
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 beneficial, 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 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
not install heater. Call dealer where you bought heater
for proper type heater.
• 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 floor.
• 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 fluids, oil or kerosene lamps,
etc.) are present in the air may discolor walls.
WARNING: Never install the hea
• In a bathroom.
• In a bedroom
• In a recreational vehicle.
ter:
• Where curtains, furniture, clothing, or other
flammable objects are less than 36 inches from
the front, top, or sides of the heater.
• As a fireplace insert
• In high-traffic 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 floor, 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 certified equipment shutoff valve with 1/
NPT tap is an acceptable alternative to test gauge
connection. Purchase a CSA/AGA certified 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 efficiency, install the heater:
8”
• Where there is easy access for operation,
inspection, and service.
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 is located on the back panel of
heater (see figure 5). It has been taped there for shipping.
Remove mounting bracket from back panel.
Installation instructions and Owner’s Manual
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