FMI (V)BFBF36 series Quick start guide

For more information, visit www.fmiproducts.com
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.
FOR USE ONLY WITH A LISTED GAS-FIRED UNVENTED
DECORATIVE ROOM HEATER NOT TO EXCEED 40,000
BTU/HR. DO NOT BUILD A WOOD FIRE.
Carefully review the instructions supplied with the
decorative type unvented room heater for the minimum
replace size requirement.
DO NOT INSTALL AN APPLIANCE IN THIS FIREBOX
UNLESS THIS FIREBOX MEETS THE MINIMUM DIMEN-
SIONS REQUIRED FOR THE INSTALLATION.
This rebox has been tested and approved under ANSI
Z21.91 for use with any ANSI Z21.11.2 approved gas logs.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
UNVENTED (VENT-FREE) UNIVERSAL FIREBOX
OWNER’S OPERATION AND INSTALLATION MANUAL
CIRCULATING MODELS
(V)BFBF36, (V)BFBL36, (V)BFBF42, AND (V)BFBL42 SERIES
PFS
®
US

www.fmiproducts.com 126333-01A2
SAFETY
TABLE OF CONTENTS
Safety .................................................................. 2
Local Codes......................................................... 3
Product Features................................................. 3
Locating Firebox.................................................. 4
Product Specications......................................... 4
Air For Combustion and Ventilation ..................... 6
Installation ........................................................... 8
Replacement Parts............................................ 17
Technical Service............................................... 17
Accessories ....................................................... 17
Parts .................................................................. 18
Warranty ..............................................Back Cover
WARNING: Any change to
this rebox or its controls can
be dangerous.
WARNING: Do not allow fans
to blow directly into the rebox.
Avoid any drafts that alter burner
ame patterns. Ceiling fans can
create drafts that alter burner
ame patterns. Altered burner
patterns can cause sooting.
WARNING: Do not use a
blower insert, heat exchanger
insert or other accessory not ap-
proved for use with this rebox.
Do not place clothing or other
ammable material on or near
the appliance. Never place any
objects in the rebox or on logs.
Firebox front and screen become
very hot when running heater.
Keep children and adults away
from hot surface to avoid burns
or clothing ignition. Firebox
will remain hot for a time after
shutdown. Allow surface to cool
before touching.
Carefully supervise young chil-
dren when they are in the room
with rebox.
WARNING: Improper instal-
lation, 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 the gas supplier.
This appliance may be installed
in an aftermarket,* permanently
located, manufactured (mobile)
home, where not prohibited by
local codes.
* Aftermarket: Completion of sale, not for
purpose of resale, from the manufacturer.
WARNING: This product
contains and/or generates
chemicals known to the state
of California to cause cancer or
birth defects or other reproduc-
tive harm.
IMPORTANT: Read this owner’s
manual carefully and completely
before trying to assemble,
operate or service this heater.
Improper use of this replace
can cause serious injury or
death from burns, re, explo-
sion, electrical shock and carbon
monoxide poisoning.

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126333-01A 3
You must operate this replace
with the provided fireplace
screen, hood if provided, in
place. Make sure these parts
are in place and screens are
closed before running rebox.
The supplied hood may not be
replaced with a hood which may
be provided with a log heater.
Keep the replace area clear and
free from combustible materials,
gasoline and other ammable
vapors and liquids.
1. Do not use this rebox as a wood-burning
replace. Use only decorative unvented
room heaters (log sets).
2. Do not add extra logs or ornaments such as
pine cones, vermiculite or rock wool. Using
these added items can cause sooting.
SAFETY
Continued
3. Use only the provided hood or appropri-
ate hood accessory. See Accessories on
page 17.
4. Vent-free gas log heaters installed in these
reboxes require fresh air ventilation to
run properly. See Air for Combustion and
Ventilation, page 6.
5. Do not run rebox
• where ammable liquids or vapors are
used or stored
• under dusty conditions
6. Do not use this rebox to cook food or
burn paper or other objects.
7. Turn rebox off and let cool before servic-
ing. Only a qualied service person should
service and repair rebox.
8. Operating rebox above elevations of
4,500 feet could cause pilot outage.
9. Do not use rebox if it has been under water
due to shock hazard that could result with
the blower accessary (if installed) in place.
LOCAL CODES
Install and use heater with care. Follow all
local codes. In the absence of local codes,
use the latest edition of The National Fuel Gas
Code, ANSI Z223.1/NFPA 54*. Firebox must
be electrically grounded in accordance with
the National Electrical Code, ANSI/NFPA70
(latest edition).
*Available from:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
State of Massachusetts: The installation
must be made by a licensed plumber or
gas tter in the Commonwealth of Mas-
sachusetts.
Sellers of unvented propane or natural
gas-red supplemental room heaters shall
provide to each purchaser a copy of 527
CMR 30 upon sale of the unit.
Vent-free gas products are prohibited for
bedroom and bathroom installation in the
Commonwealth of Massachusetts.
PRODUCT FEATURES
OPERATION
This rebox is designed for use with approved
ANSI Z21.11.2 decorative type unvented room
heaters. (Physical size limitations apply. Refer
to minimum rebox requirements supplied
with log heater.) It requires no outside vent-
ing or chimney making installation easy and
inexpensive. When used without the blower,
the rebox requires no electricity making it
ideal for emergency backup heat.
OUTSIDE AIR KIT ACCESSORY
The optional AK4 and AK4F air kit provides ad-
ditional outdoor air to improve burner efciency
and reduce build-up of condensation in living
space. Follow instructions included with air kit.
REFRACTORY BRICK LINER
Your rebox may feature a concrete refractory
brick liner. As with all concrete liners, this liner
may develop slight cracks when exposed to
heat. These cracks will not affect the perfor-
mance of the replace or vent-free gas logs.
OPTIONAL FIBER LINERS
For a vintage look, the ber panels give a old
masonry brick look and are light weight and
easy to install.

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38.125
33.099
40.057
21.412
36.125
6.625
5.063
7.363
9.734
2.968
8.201
26.482
37.416
24.906
3.846
4.427
7.756 22.605
9.734
9.256
12.942
8.197
LOCATING FIREBOX
PLANNING
Plan where you will install the rebox. This will
save time and money later when you install
the rebox. Before installation, consider the
following:
1. Where the rebox will be located. Allow for
wall and ceiling clearances (see Installa-
tion Clearances, page 9).
PRODUCT SPECIFICATIONS
Figure 1 - Firebox Dimensions 36'' Models
Right Side ViewRight Side View
Firebox Top View
Front View
Outside Air Kit Location (Optional)
2. Everything needed to complete installation.
3. These models CANNOT be installed in a
bedroom unless the maximum Btu rating
of the installed vent-free log set is less
than 10,000 Btu/hr.
4. Proper air for combustion and ventilation
(page 6).
36" MODELS
Electrical Outlet

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126333-01A 5
44.063
42.063
45.995
33.147
6.644
21.413
37.307
9.227
9.705
8.193
12.933
3.628
7.330
9.705
8.163
26.504
24.926
21.041
4.392
7.763 28.612
Figure 2 - Firebox Dimensions 42'' Models
Right Side ViewRight Side View
Firebox Top View
Front View
Outside Air Kit Location (Optional)
PRODUCT SPECIFICATIONS
Continued
42" MODELS
Electrical Outlet

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AIR FOR COMBUSTION AND VENTILATION
Unusually Tight Construction
The air that leaks around doors and windows
may provide enough fresh air for combustion
and ventilation. However, in buildings of un-
usually tight construction, you must provide
additional fresh air.
Unusually tight construction is dened as
construction where:
a. walls and ceilings exposed to the out-
side atmosphere 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 windows and doors and
c. caulking or sealants are applied to
areas such as joints around window
and door frames, between sole plates
and oors, between wall-ceiling joints,
between wall panels, at penetrations
for plumbing, electrical and gas lines
and at other openings.
If your home meets all of the three criteria
above, you must provide additional fresh
air. See Ventilation Air From Outdoors,
page 8.
If your home does not meet all of the three
criteria above, proceed to Determining
Fresh-Air Flow for Firebox Location,
page 7.
Conned and Unconned Space
The National Fuel Gas Code, ANSI Z223.1/
NFPA 54 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 ag-
gregate 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 un-
conned space.
* Adjoining rooms are communicating only if
there are doorless passageways or ventilation
grills between them.
WARNING: This heater shall
not be installed in a room or space
unless the required volume of in-
door combustion air is provided
by the method described in the
National Fuel Gas Code, ANSI
Z223.1/NFPA54, the International
Fuel Gas Code, or applicable
local codes. Read the following
instructions to insure proper fresh
air for this and other fuel-burning
appliances in your home.
Today’s homes are built more energy efcient
than ever. New materials, increased insulation
and new construction methods help reduce
heat loss in homes. Home owners weather
strip and caulk around windows and doors
to keep the cold air out and the warm air in.
During heating months, home owners want
their homes as airtight as possible.
While it is good to make your home energy
efcient, your home needs to breathe. Fresh
air must enter your home. All fuel-burning ap-
pliances need fresh air for proper combustion
and ventilation.
Exhaust fans, reboxes, clothes dryers and
fuel burning appliances draw air from the
house to operate. You must provide adequate
fresh air for these appliances. This will insure
proper venting of vented fuel-burning appli-
ances.
PROVIDING ADEQUATE
VENTILATION
The following are excerpts from National Fuel
Gas Code, ANSI Z223.1/NFPA 54, 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
The information on page 5 through 7 will help
you classify your space and provide adequate
ventilation.

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126333-01A 7
DETERMINING FRESH-AIR FLOW
FOR HEATER LOCATION
Determining if You Have a Conned or
Unconned Space
Use this work sheet to determine if you have
a conned or unconned space.
Space: Includes the room in which you will
install heater plus any adjoining rooms with
doorless passageways or ventilation grills
between the rooms.
1. Determine the volume of the space (length
x width x height).
Length x Width x Height = ______cu. ft.
(volume of space)
Example: Space size 22 ft. (length) x 18
ft. (width) x 8 ft. (ceiling height) = 3168 cu.
ft. (volume of space)
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. Multiply the space volume by 20 to deter-
mine the maximum Btu/Hr the space can
support.
_____ (volume of space) x 20 = (Maxi-
mum Btu/Hr the space can support)
Example: 3168 cu. ft. (volume of space) x
20 = 63,360 (maximum Btu/Hr the space
can support)
3. Add the Btu/Hr of all fuel burning appli-
ances in the space.
Vent-free heater _______ Btu/Hr
Gas water heater* _______ Btu/Hr
Gas furnace _______ Btu/Hr
Vented gas heater _______ Btu/Hr
Gas replace logs _______ Btu/Hr
Other gas appliances* + ______ Btu/Hr
Total = ______ Btu/Hr
* Do not include direct-vent gas appli-
ances. Direct-vent draws combustion
air from the outdoors and vents to the
outdoors.
Example:
Gas water heater _________ Btu/Hr
Vent-free heater +________ Btu/Hr
Total = ________ Btu/Hr
AIR FOR COMBUSTION AND VENTILATION
Continued
4. Compare the maximum Btu/Hr the space
can support with the actual amount of
Btu/Hr used.
_________ Btu/Hr (maximum the space
can support)
_________ Btu/Hr (actual amount of
Btu/Hr used)
Example: 63,360 Btu/Hr (maximum the
space can support)
79,000 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 sup-
port. You must provide additional fresh air.
Your options are as follows:
A. Rework worksheet, adding 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 rooms. See Ventilation Air
From Inside Building, page 8.
B. Vent room directly to the outdoors. See
Ventilation Air From Outdoors, page 8.
C. Install a lower Btu/Hr heater, if lower
Btu/Hr size makes room unconned.
If the actual Btu/Hr used is less than the
maximum Btu/Hr the space can support, the
space is an unconned space. You will need
no additional fresh air ventilation.
WARNING: If the area in which
the heater may be operated does
not meet the required volume for
indoor combustion air, combus-
tion and ventilation air shall be
provided by one of the methods
described in the National Fuel
Gas Code,ANSI Z223.1/NFPA54,
the International Fuel Gas Code,
or applicable local codes.
40,000
39,000
79,000

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VENTILATION AIR
Ventilation Air From Inside Building
This fresh air would come from an adjoining
unconned space. When ventilating 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 and 2, Figure 3). You can also remove door
into adjoining room (see option 3, Figure 3).
Follow the National Fuel Gas Code, ANSI
Z223.1/NFPA 54, Air for Combustion and
Ventilation for required size of ventilation
grills or ducts.
AIR FOR COMBUSTION AND VENTILATION
Continued
Figure 4 - Ventilation Air from Outdoors
Figure 3 - Ventilation Air from Inside
Building
Ventilation Air From Outdoors
Provide extra fresh air by using ventilation
grills or ducts. You must provide two perma-
nent openings: one within 12" of the ceiling
and one within 12" of the oor. Connect these
items directly to the outdoors or spaces open
to the outdoors. These spaces include attics
and crawl spaces. Follow the National Fuel
Gas Code, ANSI Z223.1/NFPA 54, Air for
Combustion and Ventilation for required size
of ventilation grills or ducts.
IMPORTANT: Do not provide openings for
inlet or outlet air into attic if attic has a thermo-
stat-controlled power vent. Heated air entering
the attic will activate the power vent.
INSTALLATION
Or
Remove
Door into
Adjoining
Room,
Option
3
Ventilation Grills
Into Adjoining Room,
Option 2
Ventilation
Grills
Into Adjoining
Room,
Option 1
12"
12"
Outlet
Air
Ventilated
Attic
Outlet
Air
Inlet
Air
Inlet Air Ventilated
Crawl Space
To
Crawl
Space
To Attic
WARNING: A qualied ser-
vice person must install rebox.
Follow all local codes.
WARNING: Never install the
rebox
• in a bedroom or bathroom*
• in a recreational vehicle
• where curtains, furniture, cloth-
ing or other ammable objects
are less than 42" from the front,
top or sides of the rebox
• in high trafc areas
• in windy or drafty areas
* Unless the installed log set is
rated at 10,000 Btu/Hr or less
in a bedroom or 6,000 Btu/Hr
or less in a bathroom.
CAUTION: Log heaters
installed in this rebox create
warm air currents. These cur-
rents move heat to wall surfaces
next to rebox. Installing rebox
next to vinyl or cloth wall cover-
ings or operating rebox where
impurities (such as, but not
limited to, tobacco smoke, aro-
matic candles, cleaning uids,
oil or kerosene lamps, etc.) in
the air exist, may discolor walls
or cause odors.

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126333-01A 9
IMPORTANT: Vent-free gas log heaters add
moisture to the air. Although this is benecial,
installing firebox in rooms without enough
ventilation air may cause mildew to form from
too much moisture. See Air for Combustion
and Ventilation, page 6.
IMPORTANT: Make sure rebox is level. If re-
box is not level, log set will not work properly.
Note: Your rebox is designed to be used in zero
clearance installations. Wall or framing material can
be placed against any exterior surface on the rear,
sides, top or bottom of your rebox, except where
standoff spacers are integrally attached. If standoff
spacers are attached to your rebox, these spac-
ers can be placed directly against wall or framing
materials. Use the dimensions shown for rough
opening to create the easiest installation.
Use dimensions shown for rough openings
to create the easiest installation (see Built-In
Firebox Installation, page 10).
INSTALLATION CLEARANCES
WARNING: Maintain the
minimum clearances. If you can,
provide greater clearances from
oor, ceiling and adjoining wall.
Carefully follow these instructions. This will
ensure safe installation.
Minimum Wall and Ceiling Clearances (see
Figure 5)
A. Clearances from the side of fireplace
cabinet to any combustible material and
wall should follow diagram in Figure 5.
Example: The face of a mantel, bookshelf,
etc. is made of combustible material and
protrudes 3 1/2" from the wall. This com-
bustible material must be 4" from the side
of the replace cabinet (see Figure 5).
B. Clearances from the top of rebox opening
to ceiling should not be less than 42".
C. When rebox is installed on carpeting or
other combustible material, other than
wood ooring, rebox should be installed
on a metal or wood panel extending the
full width and depth of enclosure.
D. Clearances from bottom of rebox to the
oor is 0".
These reboxes can be installed as freestanding
units against a wall with the approved, optional
cabinet mantels (see Accessories, page 17) or as
a built-in unit. Clearances are the same for either
installation method.
INSTALLATION
Continued
Figure 5 - Minimum Clearance for
Combustible to Wall
*Minimum 16" from Side Wall
*
CAUTION: Do not install re-
box directly on carpet or vinyl.
Example
Mantel Clearances for Built-In Installation
If placing custom mantel above built-in rebox,
you must meet the minimum allowable clear-
ance between mantel shelf and top of rebox
opening shown in Figure 6, page 10. These
are the minimum allowable mantel clearances
for a safe installation. Use larger clearances
wherever possible to minimize the heating of
objects and materials placed on the mantel.
CAUTION: Do not allow
the vent-free gas log heater
to touch or extend beyond the
replace screen.
NOTICE: Surface temperatures
of adjacent walls and mantels be-
come hot during operation. Walls
and mantels above the rebox
may become hot to the touch.
If installed properly, these tem-
peratures meet the requirement
of the national product standard.
Follow all minimum clearances
shown in this manual.
NOTICE: If your installation does
notmeettheminimum clearances
shown, you must do one of the
following:
• raise the mantel to an accept-
able height
• remove the mantel

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(36'') 66 7/8"
(42'') 72 7/8"
(36'') 47 3/8"
(42'') 52 1/2"
INSTALLATION
Continued
BUILT-IN FIREBOX INSTALLATION
Built-in installation of this rebox involves
installing rebox into a framed-in enclosure.
This makes the front of rebox ush with wall.
Optional brass trim accessories are available
(see Accessories, page 17). The brass trim
will extend past sides of rebox approximately
1/2". This will cover the rough edges of the
wall opening. If installing a mantel above the
rebox, you must follow the clearances shown
in Figure 6. Follow the instructions below to
install the rebox in this manner.
1. Frame in rough opening. The firebox
framing should be constructed of 2 x 4
lumber or heavier. Use dimensions in the
table and rough opening layout in Figure
7a. Adjust framing so that rebox ushes
with nished wall surface. If installing in a
corner, use dimensions in Figures 7b for
rough opening.
2. Install gas piping to rebox location. See
Installing Gas Line,page 11 and Con-
necting to Gas Supply in log set owner’s
manual.
3. Carefully set rebox in front of rough open-
ing with back of rebox inside wall open-
ing. IMPORTANT: If installing a perimeter
trim kit, see instructions included with
trim accessory. You must install shoulder
screws from trim kit now.
4. Carefully insert rebox into rough opening.
5. Attach rebox to wall studs using nails
or wood screws through holes in nailing
ange (see Figure 7).
6. If using an optional perimeter trim kit,
install the trim after nal nishing and/or
painting of wall. See instructions included
with trim accessory for attaching trim.
7. Install and properly test gas log heater.
Follow installation instructions included
with the vent-free gas log heater that is
being installed.
IMPORTANT: When nishing your rebox,
combustible materials such as wall board,
gypsum board, sheet rock, drywall, plywood,
etc. may be butted up next to the sides and top
of the rebox. Combustible materials should
never overlap the rebox front facing.
Figure 6 - Minimum Mantel Clearances
for Built-In Installation
Rough Opening Dimensions for
Built-in Installation
Model
Front Width
(Inside to Inside) Height
Depth
(Min.)
36" 38 1/4"37 5/8" 22"
42" 44 1/4"37 5/8" 22"
Figure 7 - Rough Opening for Installing
in Wall
Depth
(Minimum)
Width
(Inside to Inside)
Height
Figure
7a
Figure
7b
Supplied
Firebox Hood
Must Be Used
at All Times
Wire-mesh
Screen
Firebox
Noncombustible
Material May
Project Off this
Surface above
the Firebox Hood
Mantel Shelf
Note: Any portion of the
mantel shelf must NOT
extend beyond this profile.
12" 16" 20"
1
1
/ 2 "
6
3
/ 4 "
12"
Note: All vertical
measurements are
from top of fireplace
hood opening to
bottom of mantel shelf.
These minimum
clearances replace any
other recommended
clearances supplied
with your ANSI Z21.11.2
approved gas logs.
Wall board or facing
material (above
firebox) may be of
combustible material,
including decorative
mantel ornaments or
other similar projec-
tions off of the facing
material.
Framing
Material

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126333-01A 11
WARNING: Do not allow any
combustible materials to overlap
the rebox front facing.
IMPORTANT: Noncombustible materials such
as brick, tile, etc. may overlap the front facing,
but should never cover any necessary open-
ings like louvered slots.
WARNING: Do not allow
noncombustible materials to
cover any necessary openings
like louvered slots.
WARNING: Use only non-
combustible mortar or adhe-
sives when overlapping the front
facing with noncombustible
facing material.
INSTALLATION
Continued
Figure 8 - Attaching Firebox to Wall
Studs
Nailing
Flanges
Nails or
Wood
Screws
Figure 9 - Installing Gas Line and
Equipment Shutoff Valve (Model May
Vary From Illustration)
Knockout
Locations
(Knock Out
One Hole)
Gas Line Hole
Equipment Shutoff
Valves (Install One)
INSTALLING FIREBOX USING
OPTIONAL ACCESSORY MANTELS
WARNING: A qualied ser-
vice person must install rebox.
Follow all local codes.
This rebox may be installed using a cabinet
mantel accessory against a wall in your
home. The rebox and cabinet mantel can
be installed directly on the oor. A trim kit is
included with the mantel accessories. Follow
instructions with mantel for installation.
INSTALLING GAS LINE
NOTICE: A qualied service per-
son must connect heater to gas
supply. Follow all local codes.
IMPORTANT: See Connecting to Gas Supply
in your log set owner’s manual for details on
gas hookup.
You may run the gas line from either side of
the rebox (see Figure 9). Decide which side
you want to run the gas line from.
Note: This is one option for installing shutoff
valve. Check local codes for equipment shut-
off valve location requirements.

www.fmiproducts.com 126333-01A12
INSTALLATION
Continued
INSTALLING OPTIONAL BLOWER
ACCESSORY
NOTICE: The rebox identica-
tion label (including model num-
ber, serial number, clearances,
etc.) is located in the right side
screen pocket area on the front
of the rebox. See Figure 19,
page 17.
NOTICE: If a log set is installed
in the rebox, disconnect log
set from gas supply and remove
from rebox. Contact a qualied
service person to do this.
Note: Appearance of rebox may vary de-
pending on model.
There is one (1) blower accessory option
for use with this replace. Blower accessory
model BK . Model BK is a rotary squirrel cage
type blower with magnetic attachment and
variable speed control.
Wiring Instructions
1. Remove electrical cover plate with bush-
ing from replace by removing 2 sheet
metal screws as shown in Figure 11, page
13.
2. Slide power source wiring through electri-
cal bushing opening and electrical cover
plate and make all necessary connec-
tions.
3. Slide all wiring connections in electrical
housing as shown in Figure 11, page 13.
4. Secure electrical cover plate with screws
previously removed.
Note: Electrical housing and cover plate have
sharp edges. Wear protective gloves.
Figure 10 - Location of Knockout for
Gas Line
1/2" Thick Liner
Side View
Firebrick Side Wall
Knockout Remove
This Area
USING OPTIONAL FIBER PANELS
There is a gas knockout in each side panel
for the gas line to feed through. Determine on
which side the gas connection will be located.
Using a utility knife or cutting blade, remove
the identied gas knockout.
CAUTION: Do not use ex-
cessive force to remove the
knockout. Too much force may
damage the ber panel.

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126333-01A 13
Electrical
Bushing
Electrical
Cover
Plate
Rocker
Switch
Figure 11 - Fan Switch-Electrical Bushing
Electrical
Housing
Wire Nut (3x)
(Not Supplied)
Outer Wrapper
of Fireplace
Electrical Cover
Plate and
Electrical Bushing
Fireplace Chassis
Ground
To Power
Source
Receptacle
(Supplied)
Power Source Wiring
(Not Supplied)
Prewired Receptacle
and Ground
Sheet
Metal
Screws
INSTALLATION
Continued
Decide which way you intend to gain access
into the bottom rear of the rebox to install the
blower accessory. The lower front panel can
be removed easily by snapping out the front
with a at blade screwdriver. Use caution not
to scratch any surfaces. Models with louvered
front panels can also be removed by inserting
ngertips between slots and gently pulling out.
DO NOT FORCE. The panels are actually
held in place by means of a retention dimple
embossed on the edge of removable panels.
Accessibility to the bottom on 36" and 42"
models only, can also be gained through the
access cover plate on the bottom front of the
rebox hearth. Remove the screws to expose
the rectangular shaped access panel (see
Figure 12). The sides and back refractory
brick liner pieces do not have to be removed
(if installed). Lift access panel out by using
nger holes. Blower accessory BK can now
be installed.
Figure 12 - Removing Access Cover Plate
Access
Cover Plate
Screws
Duplex Electrical Outlet
Figure 13 - Accessing Duplex Electrical
Outlet Installed in Bottom Right Side of
Firebox
WARNING: If there is a duplex
electrical outlet installed in the
right side of the bottom of the
replace base area (see Figure
13), be sure that the electrical
power to the outlet is turned off
before proceeding with blower
installation. Failure to do this
may result in serious injury.

www.fmiproducts.com 126333-01A14
INSTALLATION
Continued
Figure 15 -Attaching Speed Control
(Model May Vary From Illustration)
Control
Shaft
Firebox
Hearth
Control
Knob Lock
Nut
3. Using pliers, remove lock nut from speed
control by turning counter clockwise.
Mount speed control box by placing
plastic control shaft through hole on left
or right side of the rebox hearth by slid-
ing control box down through large hole
in rebox bottom and up through hole
(see Figure 15). Secure speed control to
rebox hearth with previously removed
lock nut with pliers by pushing and turn-
ing lock nut until it is tight against rebox
hearth of replace (see Figure 15).
4. Check to make sure power cord is com-
pletely clear of blower wheel and there
are no foreign objects in blower wheel.
Also, double check all wire leads and
make sure wire routing is not pinched
or in a precarious position. Correct ac-
cordingly.
CAUTION: Use gloves as
sheet metal parts may be sharp.
Model BK Installation
1. Be certain that all wire terminals are
securely attached to terminals on blower
motor and that the screw retaining the
green ground wire is tight (see Figure 14).
2. Place blower against lower rear wall of
rebox outer wrapper with exhaust port
directed upward. Depending on your
model, you may have to carefully route
the blower assembly past controls and
brackets and position blower inside
back opening. The blower will be held in
position against the back wall by magnets
incorporated onto blower housing (see
Figure 14).
Figure 14 - Blower Model BK
Magnetic Strips
Exhaust
Port
Screw
Green
Ground
Wire
Spade
Terminals
Side View
Firebox Bottom
Air Flow
Direction
Blower
Installed
After
Lower
Panel
Removed
Blower
Location Magnets

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126333-01A 15
INSTALLATION
Continued
Figure 16 - Location of Wiring Diagram
Decal (Model May Vary From Illustration)
Wiring Diagram
Decal 12" in
Front of Blower
Variable
Fan Switch
Green
White
On
110/115
V.A.C.
Blower
Motor
Black
Off 1
2 Black
CAUTION: Never touch a
blower wheel while in operation.
5. Turn on power to duplex outlet if previ-
ously turned off per warning in column
2, page 13.
6. Plug in blower power cord to duplex
outlet (see Figure 13, page 13).
7. Turn blower on and check for operation.
Turn blower off by turning knob fully
counterclockwise before continuing.
8. Peel off backing paper and stick supplied
wiring diagram decal on rebox bottom
approximately 12" in front of blower (see
Figure 16).
9. Replace all panels if previously removed.

www.fmiproducts.com 126333-01A16
INSTALLATION
Continued
OPTIONAL OUTSIDE AIR KIT
(MODEL AK4/AK4F)
Installation of outside air kit should be per-
formed during rough framing of replace due
to the nature of it's location. Outside combus-
tion air is accessed through a vented crawl
space (AK4F) or through a sidewall (AK4).
See Figure 17.
CAUTION: Combustion air
inlet ducts shall not terminate
in attic space.
Figure 17 - Outside Air Kit
Secure to Collars with Metal Tape, Screws
or Straps (Min. of 1/4" x 20" in size)
Air Inlet
Location
Must Allow
For Bushes
or Snow
Vent Hood
Required for
Wall Installation
Air Inlet
Eyebrow
Vented Crawl Space
(Check Local Codes
Before Installing in a
Vented Crawl Space)
Screws
Hood
INSTALLING FIREPLACE HOOD
AND SCREEN
1. Attach hood to rebox using screws pro-
vided (see Figure 18).
2. Insert each rod through all rings located
at top of screen.
3. Insert rst rod into rear hole in left side
of rebox. Fasten rod to rear hole near
center of rebox using #10 x 3/8" Phillips
screw provided (see Figure 19).
4. Insert other rod into front hole on right
side of rebox and fasten using remaining
Phillips screw.
Figure 18 - Screw and Hood Placement
(Model May Vary From Illustration)
Figure 19 - Installing Fireplace Screen
(Model May Vary From Illustration)
Screw
Rear Hole
Top View of Rod Layout
Rod
Front
Hole
Ring
Screen
Identication
Label Location

www.fmiproducts.com
126333-01A 17
REPLACEMENT PARTS
NOTICE: All accessories may
not be available for all replace
models.
Purchase these accessories from your local
dealer. If they can not supply these accessories
call FMI PRODUCTS, LLC at 1-866-328-4537
for information. You can also write to the ad-
dress listed on the back page of this manual.
OUTSIDE AIR KIT
AK4 - Complete Kit w/ Collar, Hood & 3' of
Flex Tube
Optional kit provide additional air to reduce
build-up of condensation that occurs in
today’s tightly constructed homes.
AK4F - Outside Air Kit for Floor Installation.
BLOWER KIT
BK - Squirrel Cage Blower With Speed
Control.
If this product is missing a part or has a
broken component, please do not return it
to the store. Call FMI PRODUCTS, LLC at
1-866-328-4537 to answer questions and
replace parts under warranty.
Note: Use only original replacement parts.
This will protect your warranty coverage for
parts replaced under warranty.
When calling or writing, please have your
model and serial numbers of your replace
ready.
Model and serial number information are in the
replace's rating plate located in the screen
pocket to the left or right of the face opening.
TECHNICAL SERVICE
You may have further questions about
installation, operation, or troubleshooting.
If so, contact FMI PRODUCTS, LLC at
1-866-328-4537.
When calling please have your model and
serial numbers of your heater ready.
You can also visit FMI PRODUCTS, LLC’s
web site at www.fmiproducts.com.
ACCESSORIES
RUNNING BOND CERAMIC FIBER
BRICK LINER KITS
BLB36SF - 36" Stacked Red
BLB42SF - 42" Stacked Red
RUNNING BOND REFRACTORY
BRICK LINER KITS
BLB36SR - 36" Stacked White
BLB42SR - 42" Stacked White

www.fmiproducts.com 126333-01A18
PARTS
MODELS (V)BFBF36K, (V)BFBL36K, (V)BFBF36WS, (V)BFBL36WS,
(V)BFBF42K, (V)BFBL42K, (V)BFBF42WS, AND (V)BFBL42WS
1
3
4
2
5
5
11
12
7
7
6
9
10
8

www.fmiproducts.com
126333-01A 19
KEY
NO. PART NO. DESCRIPTION QTY.
1 107127-01 Screen •••• 2
108424-01 Screen •••• 2
2 20806 Screen Rod •••• 2
108790-01 Screen Rod •••• 2
3 11418 Push-On Nut •••••••• 2
4 123494-01 Hood, Deector • • • • 1
123494-02 Hood, Deector • • • • 1
5 124483-01 Side Refractory White Stack • • • • 2
6 124484-01 Rear Refractory White Stack • • 1
124485-01 Rear Refractory White Stack • • 1
7 20027 Refractory Bracket • • • • 2
8 20280 Top, Spacer •••••••• 4
9 107128-01 Conduit, Gas •••••••• 4
10 110037-01 Electrical Duct Assembly •••••••• 1
11 21198 Plate, Blower Access • • • • • • • • 1
12 21171 Cover, Gas Conduit •••• 3
21171 Cover, Gas Conduit •••• 2
PARTS
This list contains replaceable parts used in your rebox. When ordering parts, follow the
instructions listed under Replacement Parts on page 17 of this manual.
(V)BFBF36K (V)BFBF42K (V)BFBL36K (V)BFBL42K (V)BFBF36WS (V)BFBF42WS (V)BFBL36WS (V)BFBL42WS

126333-01
Rev. A
05/12
WARRANTY
KEEP THIS WARRANTY
FMI PRODUCTS, LLC LIMITED WARRANTIES
New Products
Standard Warranty: FMI PRODUCTS, LLC warrants this new product and any parts thereof to be free from defects
in material and workmanship for a period of four (4) years from the date of rst purchase from an authorized dealer
provided the product has been installed, maintained and operated in accordance with FMI PRODUCTS, LLC’s
warnings and instructions.
For products purchased for commercial, industrial or rental usage, this warranty is limited to 90 days from the date
of rst purchase.
Factory Reconditioned Products
Limited Warranty: FMI PRODUCTS, LLC warrants factory reconditioned products and any parts thereof to be
free from defects in material and workmanship for 30 days from the date of rst purchase from an authorized dealer
provided the product has been installed, maintained and operated in accordance with FMI PRODUCTS, LLC’s
warnings and instructions.
Terms Common to All Warranties
The following terms apply to all of the above warranties:
Always specify model number and serial number when contacting the manufacturer. To make a claim under this
warranty the bill of sale or other proof of purchase must be presented.
This warranty is extended only to the original retail purchaser when purchased from an authorized dealer, and only
when installed by a qualied installer in accordance with all local codes and instructions furnished with this product.
This warranty covers the cost of part(s) required to restore this product to proper operating condition and an allowance
for labor when provided by a FMI PRODUCTS, LLC Authorized Service Center or a provider approved by FMI PROD-
UCTS, LLC. Warranty parts must be obtained through authorized dealers of this product and/or FMI PRODUCTS, LLC
who will provide original factory replacement parts. Failure to use original factory replacement parts voids this warranty.
Travel, handling, transportation, diagnostic, material, labor and incidental costs associated with warranty repairs, unless
expressly covered by this warranty, are not reimbursable under this warranty and are the responsibility of the owner.
Excluded from this warranty are products or parts that fail or become damaged due to misuse, accidents, improper
installation, lack of proper maintenance, tampering, or alteration(s).
This is FMI PRODUCTS, LLC’s exclusive warranty, and to the full extent allowed by law; this express warranty
excludes any and all other warranties, express or implied, written or verbal and limits the duration of any and all
implied warranties, including warranties of merchantability and tness for a particular purpose to four (4) years on
new products and 30 days on factory reconditioned products from the date of rst purchase. FMI PRODUCTS, LLC
makes no other warranties regarding this product.
FMI PRODUCTS, LLC’s liability is limited to the purchase price of the product, and FMI PRODUCTS, LLC shall not
be liable for any other damages whatsoever under any circumstances including indirect, incidental, or consequential
damages.
Some states do not allow limitations on how long an implied warranty lasts or the exclusion or limitation of incidental
or consequential damages, so the above limitation or exclusion may not apply to you.
This warranty gives you specic legal rights, and you may also have other rights which vary from state to state.
For information about this warranty contact:
Model ( located on product or identication tag )_____________________________
Serial No. ( located on product or identication tag )__________________________
Date Purchased __________________________
Keep receipt for warranty verication.
2701 S. Harbor Blvd.
Santa Ana, CA 92704
1-866-328-4537
www.fmiproducts.com