Vermont Castings Majestic BFC36 Mounting instructions

647
BFC cover
8/18/00 djt
BFC
Balanced Flue
(Closed Combustion)
Heat-Circulating Fireplace
Model:
BFC36
For use in the U.S. / Canada
Underwriter’s Laboratories
Report No. MH7603
DO NOT DISCARD THIS MANUAL: Retain for future use.
7412647 1/13 Rev. 21
Homeowner’s Installation and
Operating Manual

2
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
Safety Information ......................................................................................3
Specications and Framing .......................................................................4
Parts Identication ....................................................................................5
Chimney Requirements ............................................................................6
Planning Information ..................................................................................7
Installation .................................................................................................8
Replacement Parts ..................................................................................18
Accessories .............................................................................................20
Warranty...................................................................................................23
Table of Contents
BFC36
Listed
UL127 / ULC-S610
Standard for Factory Built Fireplaces

3
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
Safety Information
Please Read This Manual Before Installing and Using Fireplace
IMPORTANT: Read all instructions and warnings carefully before starting installation. Failure to follow these instructions
may result in a possible re hazard and will void the warranty.
Description
The BFC36 replace is a solid fuel, woodburning replace.
The BFC36 is a balanced ue (closed combustion) heat-
circulating replace which receives outside combustion air
through the chimney system. This unique system results
in much higher efciency since valuable room air is not
used for combustion.
The BFC36 is a decorative replace which provides ef-
cient supplemental heat compared to other wood burning
replaces. It should not be used as a primary source of
heat.
CAUTION: Overloading the rebox with wood may result
in overring and damage to refractory components, the
grate and doors.
Precautions
Vermont Castings Group replaces and component parts
have been thoroughly tested and will operate safely when
installed in accordance with instructions provided in this
manual. Carefully read and understand all instructions
before beginning installation.
If you notice any damage to replace or component parts,
immediately report damage to your Vermont Castings
Group dealer.
Only use Vermont Castings Group components or the war-
ranty will be voided and a re hazard may be created.
Vermont Castings Group warranty will be voided by and
Vermont Castings Group disclaims any responsibility for
the following actions:
• Installation by any other than a qualied installer,
preferably NFI or WETT (Canada) certied.
• Installation of any damaged replace or chimney
component;
• Modication of replace, chimney assembly or
any component parts thereof; (except for chase
ashings as detailed in Vermont Castings Group
Chimney Top installation instructions).
• Installation other than as instructed by Vermont
Castings Group; or
• Installation and/or use of any component part
not manufactured or approved by Vermont Cast-
ings Group in combination or assembly with a
Vermont Castings Group replace system, not-
withstanding any independent testing laboratory
or other third party approval of such component
parts or accessory.
Any such action may possibly cause a re hazard.
Consult local building codes to ensure that you are in
compliance before installing the replace.
This replace and chimney system must be vented to the
out-of-doors.
Do not obstruct or modify air inlets/outlets in any
manner.
Do not install combustible materials on any of the black
replace surround.
Burn only solid wood fuel or gas logs.
The BFC36 is intended for operation only with the
doors closed.
Do not install a solid fuel burning insert or other prod-
ucts not specied for use with this replace.
Drafts
The replace should not be located in areas that create
drafts (ie: frequently opened doors and central heating
air inlets/outlets) that hamper the normal ow of air into
the re.
Gas Logs
If you plan to install a gas log, the gas line should be in-
stalled before framing the replace. The gas line must be
installed by a certied gas line installer.
Proposition 65 Warning: Fuels used in gas, wood-
burning or oil red appliances, and the products of
combustion of such fuels, contain chemicals known to
the State of California to cause cancer, birth defects
and other reproductive harm.
California Health & Safety Code Sec. 25249.6
WARNING: Check with your electronics manufacturer
before installing a television or other electronic de-
vice above this replace.

4
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
BFC36 Balanced Flue Heat-Circulating Fireplace
Fig. 1 BFC36 specications and framing.
6" (16mm)
56O" (13mm)
56O"
326"
(829mm)
41(6" (1064mm)
6"
(16mm)
56QE"
(49mm)
" (914mm)
"
(533mm)
56QE" (176mm)
56QE" (179mm)
Recessed
Nailing
Flange
647
BFC36 specs
8/18/00 djt
1356O" Dia.
(343mm)
Rough Opening Width 43"
Rough
Opening
Height
Rough
Opening
Depth
Gas Line
Access
5156QE" (1297mm)
5156QE"
(1297mm)
6QE" (1834mm)
6M"
(197mm)
23"
(584mm)
"
(610mm)
6QE"
(624mm)
3956M"
(997mm)
556QE"
(246mm)
35"
(889mm)
"
(279mm)
Gas Line
Access
56O"
(902mm)
36"
(914mm)
(1092mm)
11" Dia.
(179mm)
8" Dia.
(203mm)
56" (918mm)
A
B
C
FP1531
hearth dimensions
9/04 djt
Front Width Back Width Depth
A B C
BFC36 32Z\x" 20M\zn" 17C\v"
(826 mm) (519 mm) (451 mm)
FP1531
Fig. 1a Hearth dimensions.

5
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
FP554a
BFC
Fireplace and chase parts identification
circulating model
8/21/00 djt
Termination Cap
Storm Collar
Pan Flashing
Draftstop
Standoff
Surround
Trim Ledge
Standoff
Glass Door
Romex Pigtail
Gas Line Access Knock-
out (Each Side)
Air Inlet
Basket Grate
Bottom Grille
Metal Safety Strip(s)
Shown not inplace
(1,2 or 3 pieces)
Nailing Flange
Top Grille and Air Outlet
Gas Line Ac-
cess Hole
(Each Side)
Ceiling Level
Firestop
Batt Insulation
(Cut out around
restop)
FP554c
Fig. 2 Fireplace and chase parts identication.

6
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
D
Rise
BG
H
B
Offset
C
E
6 FT.
G
H
A
Hearth
Floor
Chimney
Section
CHIMNEY FLUE EXIT
Elbow
FP269
MBUF
5/16/96
rev. 5/25
TCS8A
Support
Example 1 Example 2 Example 3
Chimney Requirements - Offset Installations
Notes: G + H cannot exceed 20 feet.
Air Space Clearances: = 2” Min. to Combustibles
Illustration Key
The following safety rules apply to
offset installations (letters correspond
with illustration above):
A. Height of the chimney is measured
from the hearth to the chimney exit.
BFC36
Maximum: 50’0”
Minimum:
Without Elbows 14’6”
With 2 Elbows* 14’6”
With 4 Elbows* 21’0”
B. Do not use more than 4 elbows per
chimney.
Attach the straps of the return (top)
elbow to a structural framing member.
The offset (rst) elbow of any pair does
not have straps.
FP269
C. The chimney cannot be more than 30˚
(45˚ in Canada) from the vertical plane in
any installation*.
D. The maximum length of the angled run
of the total chimney system is 20 feet. (G
plus H cannot exceed 20 feet.)
E. A chimney support (Model TCS8A)
is required every 6 feet of angled run of
chimney. Chimney supports are required
for every 30 feet and 60 feet of vertical
chimney height above the hearth.
Determine the offset distance of your
chimney arrangement from the centerline
of the replace to the centerline of the
chimney where it is to pass through the
rst ceiling.
NOTE: This offset distance may not be
your full offset distance. See Examples 2
and 3.
Fig. 3 Chimney system requirements.
IWF282
0 0 0 0 0 3” 11”
1 0 0 0 0 8Z\v" 20"
0 1 0 0 0 11Z\v" 25Z\v"
2 0 0 0 0 13Z\x" 29Z\v"
1 1 0 0 0 16Z\x" 34Z\v"
0 0 1 0 0 20Z\v" 40C\v"
2 1 0 0 0 21C\v" 43Z\x"
0 0 0 1 0 26Z\v" 51Z\v"
0 1 1 0 0 28Z\x" 55Z\v"
1 0 0 1 0 31Z\x" 60Z\v”
0 1 0 1 0 34Z\x" 65Z\x"
0 0 2 0 0 37Z\x" 70C\v"
1 1 0 1 1 41Z\x" 77C\v"
0 0 1 1 1 45" 83C\v"
0 1 2 0 1 47Z\v" 87Z\x"
0 0 0 2 1 51" 94"
0 1 1 1 1 53Z\v" 98"
0 0 3 0 1 56Z\v" 103Z\v"
0 1 0 2 1 59Z\v" 108Z\x"
0 0 2 1 1 62Z\v" 113Z\x"
0 1 3 0 1 64Z\x" 117Z\x"
0 0 1 2 1 68Z\v" 124"
0 1 2 1 1 70Z\x" 128"
0 0 0 3 1 74Z\v" 134Z\x"
0 1 1 2 2 78" 140C\v"
0 0 3 1 2 81" 146"
0 1 0 3 2 84" 151Z\v"
0 0 2 2 2 87" 156Z\x"
0 1 3 1 2 89Z\v" 160Z\v"
0 0 1 3 2 93" 166C\v"
0 1 2 2 2 95Z\v" 170C\v"
0 0 0 4 2 99Z\v" 177C\v"
0 1 1 3 2 101Z\v" 181C\v"
0 0 3 2 2 104Z\v" 186Z\v"
0 1 0 4 2 107Z\v" 191Z\x"
0 0 2 3 2 110Z\v" 196C\v"
0 1 3 2 3 114" 203Z\v"
0 0 1 4 3 117C\v" 209C\v"
0 1 2 3 3 120" 213Z\x"
0 0 0 5 3 123C\v" 220"
30˚ Elbow Offsets
1’ 1¹⁄₂'3’ 4’
Chimney Support
Offset Rise
FP282
MBUF
5/26/96
Offset
Rise
30°
Return
Elbow
30°
Return
Elbow
30°
Offset
Elbow
30°
Offset
Elbow

7
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
Planning Information
Preplanning an installation is very important to ensure
safety and to save time and money. An installer must
predetermine where a replace will be set and how the
chimney system will be run.
Mounting the Fireplace
A replace may only be mounted on the following sur-
faces:
1. A at combustible surface.
2. A raised wooden platform.
3. A concrete block or other solid object placed beneath
each of the four (4) corners of the replace.
The replace must be spaced 1” (25 mm) from a combus-
tible back wall and 1/2” (13 mm) from a combustible side
wall or support. (Page 13, Fig. 17)
Planning the Chimney Run
Determine how the chimney will be run, length of run and
chimney components required to complete the job. (Fig. 4)
Never install a chimney below minimum heights.
In planning a chimney system, it is important to know:
1. The height of a chimney is measured from the hearth
to the exit point on the termination.
2. A chimney cannot be offset more than 30° from a vertical
plane.
3. A chimney may run straight up or it may be necessary
to offset it to avoid obstructions.
4. The maximum length of an angled run (total chimney
system) is 20’ (6 m).
5. No more than 2 offsets (4 total 30° elbows in U.S./or
2 total 45° elbows in Canada) per replace may be
used.
6. A guy wire stabilizer is required for chimneys extending
more than 6’ (1.8 m) above a roof line.
The Ten Foot Rule
Major U.S. building codes specify a minimum chimney
height above the roof top. The “Ten Foot Rule” is a re
safety rule and not a draft rule. To ensure proper draft, it
is recommended that you always meet or exceed the “Ten
Foot Rule,” especially when installing a termination on a
high pitch roof. (Fig. 5)
The key points of the “Ten Foot Rule” are:
1. If the horizontal distance from the chimney to the peak of
the roof is 10’ (3m) or less, the top of the chimney must
be at least 2’ (610mm) above the peak of the roof, but
never less than 3’ (914mm) in height above the highest
point where it passes through the roof.
2. If a horizontal distance from the chimney to the peak of
the roof is more than 10’ (3 m), a chimney height refer-
ence point is established on the surface of the roof a
distance of 10’ (3m) from the chimney in a horizontal
plane. The top of the chimney must be at least 2’ (610
mm) above the reference point, but never less than 3’
(914 mm) in height above the highest point where it
passes through the roof.
L1
L1
LTTOTAL
LENGTH
(LT)
INSTALLED
LENGTH
(L1)
56O"
56O"
56O"
56O"
56O"
56O"
56O"
56O"
FP288A
MBUF-INSTALLED LENGTH
Triple wall
1/28/99 djt
TRIPLE
WALL
81
818
83
84
FP288a
Fig. 4 Installed lengths of chimney sections.
2' Min.
2' Min.
3'
Min.
0 To 10'
3'
Min.
0 To 10'
AC246
4/1/96
Reference
Point
AC246
Fig. 5 Ten Foot Rule illustration.
Chimney Supports
The chimney system is supported by the replace for verti-
cal chimney heights less than 30’ (9m) above the hearth.
Chimney supports are required if the vertical height ex-
ceeds 30’ (9m). Locate chimney supports at ceiling holes
or other structural framing at 30’ (9m) heights. Spacing
between chimney supports must not exceed 30’ (9m).
Use Chimney Support Model TCS8A. (NOTE: The TCS8A
cannot be mounted directly to the replace.) Support
provided by elbow straps fullls the support requirement
only if they are spaced as previously described. (A chimney
support is 2Z\x" (64mm) long when installed.)
Angled chimney runs require a support every 6’ 1.8m) in
addition to the elbow straps. Chimney supports are used
for this function. (Fig. 6)

8
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
FP284a
TCS8A
8/21/00
Chimney Sup-
port Strap
TCS8A FP284a
Fig. 6 Chimney support installation.
Chase Installation
A chase is a vertical box-like structure which encloses the
replace and/or chimney. Chases are typically built on the
outside of the house with replace opening cut into the
outer wall of a room. (Page 4, Fig. 2)
If you need help in determining replace location or how
the chimney system should be run, contact your Vermont
Castings Group dealer for assistance.
Installation
FPC555a
Platform insulation
BFC model
8/21/00 djt
Hard Flat
Surface
Insulation
Platform
FPC555a
Fig. 7 Insulating between platform and replace.
Insulating Fireplace Enclosure
for Cold Climates
If you live in a cold climate, it is not required but highly
recommended that you insulate replace enclosure to
eliminate cold air penetration as much as possible.
Insulate base of replace with a noncombustible insula-
tion rated for a minimum of 300°F. Insulating is very
important for outside wall installations over a concrete
slab. If replace is installed on a platform, insulation
should be placed on top of the platform before replace
is set. (Fig. 7)
When a replace is installed in a chase or on a outside
wall, enclosure should be treated like any outside wall
in a home. Insulation should be installed on the inside
wall as well as the outside wall(s). In a chase, it is also
a good idea to install a restop at the rst ceiling level
above the replace and enclose the chase with sheeting
material. Insulation may then be installed above sheet-
ing material to assure the space around the replace is
totally protected. (Fig. 2)
When installing the chimney, DO NOT caulk between
outer pipe and restop. It is vital that some air be allowed
to ow through this very thin gap.
CAUTION: When installing a replace in an insu-
lated enclosure, be sure all required air spaces are
maintained. (Page 13, Fig. 17)
Framing
Framing can be constructed before or after the replace
is set in place, however, most installers build the frame
before setting the replace.
Frame replace with 2 x 4 lumber or heavier materials.
Refer to framing dimensions in Figure 1 for basic replace
specications.
NOTE: Framing should be positioned to accommodate
wall covering and replace facing material.

9
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
Electrical Wire Installation
The fan requires 120V AC, 60 Hz power which may be
connected from the right side of the replace. This power
connection must be completed before the replace is se-
cured and nish material applied.
NOTE: Refer to instruction sheet for Model SCVS Variable
Speed Fan control for speed control wiring schematic.
The lower cavity of the replace may be accessed by
removing the lower grille. Lift grille and pull lower side out
to remove.
1. If using romex type power supply wiring, install a strain
relief tting into the small access hole in the lower right
side of the replace outer wrapper.
2. Route house power wires into the replace through the
tting.
3. Extend these wires through large front hole of right side
oor support.
4. Using supplied junction box assembly, connect and
secure house romex wiring to duplex outlet. Ensure
correct polarity and that the ground wire is securely
connected.
5. Secure romex wiring using supplied strain relief tting
at rear of junction box. Re-assemble junction box.
6. Secure romex wiring at strain relief tting in replace
outer wrapper.
7. Mount junction box mounting plate to inside face of right
side oor support using two self-tapping sheet metal
screws.
8. Plug blower cord into duplex outlet.
9. Replace lower grille.
Chimney Set-up
Since you have already preplanned the chimney run,
you should know exactly how the installation is to be ac-
complished — how much pipe is required, the number of
elbows, if any, and type of termination to be used.
CAUTION: REPORT TO YOUR DEALERS ANY PARTS
DAMAGED IN SHIPMENT, SPECIFICALLY CHECK THE
END CONNECTION OF CHIMNEY SECTIONS AND
ELBOWS.
NOTE: The BFC36 replace must use Vermont Castings
Group Model triple wall 8” chimney components only. The
installation procedure described in this manual applies
only to this system.
Straight-Up Chimney Installation
To mark the centerline of the ue, put the replace in nal
position and measure out from the wall: 8C\v" (222 mm).
Mark a spot on the ceiling directly above the replace. Draw
a line parallel to the back wall through this mark. (Fig. 8)
Using a plumb bob positioned directly over center point
of replace ue collar, mark the ceiling to establish the
chimney center point. (Fig. 8)
FPC556a
BFC36
LOCATE CENTER LINE
Circulating model
8/21/00 djt
86M"
(222mm)
Chimney Centerline
Actual Center-
point
Plumb Line
Plumb Bob
Imaginary Center-
point
FPC556a
Fig. 8 Locate centerline of chimney with plumb line.
Offset Installation
In order to clear an obstruction, it may be necessary to
offset chimney from vertical. This is accomplished by us-
ing elbows. Use the 30° Offset Elbow table on Page 5 to
determine proper offset and parts required.
Each offset requires two (2) elbows. The second elbow is
equipped with support straps. It is very important to install
the second elbow in each offset as close to the ceiling
or support as possible so that the elbow straps can be
secured to framing members to help support the weight
of the chimney.
Determine offset distance of your chimney arrangement
from centerline of replace to centerline of chimney where
it is to pass through ceiling.
Locate center point of the chimney on ceiling as though a
straight up chimney arrangement is to be used. Measure
your offset dimension from straight up chimney center
point on ceiling.

10
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
Ceiling Chimney Hole/
Possible Obstructions
The size of the hole in ceiling will vary with the angle at
which the chimney passes through ceiling.
Drive a nail up through ceiling at marked chimney center
point. Go to oor above and see where hole will be cut.
Check to see where existing ceiling joists and other pos-
sible obstructions are located...i.e. wiring, plumbing etc...
If necessary, re-position chimney and/or replace to avoid
obstructions.
Cutting the Hole
Cover replace collar opening and cut proper sized chim-
ney hole in chimney.
Framing the Ceiling Hole
Frame the ceiling chimney hole as shown in Figure 9. It is
good practice to use framing lumber that is the same size
as the ceiling joists; this is a requirement at attic level.
New
Framing
Members
Existing
Ceiling
Joists
Fig. 9 Typical frame for ceiling chimney hole.
FP551b
17 1/2"
Framing chimney hole
5/13/99 djt
Ceiling
Chimney
Hole
17Z\x”
(445mm) 17Z\x”
(445mm)
FP551b
Fig. 10 Ceiling chimney hole sizes necessary for installing
restop spacer.
WF557
BR
11/10/97
Metal Safety Strips
(1,2 or 3 pcs.)
“Z” Safety
Strip
(not sup-
plied)
Fire-
place
Plat-
form Hearth Ext.
Z\x” (13mm)
Min. Overlap
1Z\x”
(38mm)
FP557b
Fig. 11 Safety strip installation.
The following table gives restop spacer model num-
bers:
Chimney Hole Size
Angle of Chimney
at Ceiling
Size of Chimney Vertical 30°
FS2A FS6A
8” Flue 17Z\x” x 17Z\x” 17M\₈” x 29⁵\₈”
(445 x 445mm) (454 x 753mm)
The inside dimension of the frame must be the same as
the hole size selected from Figure 10 in order to provide
required the 2” (51 mm) air space between the outside
diameter of the chimney and the edges of the framed
ceiling hole.
Positioning, Safety Strips,
Securing the Fireplace
Slide replace into position.
Lift the replace front slightly and slide the metal safety
strips under front bottom edge about 1Z\x” (38 mm), allowing
the remainder to extend in front of rebox. Overlap strips
at least 1/2” (13 mm) to provide a positive joint. (Flat safety
strips are packed with replace.) (Fig. 11)
Safety strips are used to ensure that any combustible ma-
terials in front of the replace are protected even though a
non-combustible hearth extension is required.
If replace is to be elevated above the oor, a “Z” shaped
metal safety strip must be fabricated and used to protect
combustible surfaces in front of the replace. This “Z”
shaped safety strip is not provided but must be fabricated
of metal with each horizontal leg at least 1Z\x” (38mm) wide
and equal in length to the metals strips provided with the
replace.
NOTE: Safety strips are not required over non-combustible
oors where all supports at the base of the replace are
noncombustible.
Four (4) nailing anges are supplied with the replace
(found on the replace hearth). To level the box and se-
cure it rmly in place, remove the nailing anges from the
hearth and install at the sides of the replace as shown
in Figure 12.

11
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
FPC549a
BFC
Nail flange/standoff
circulating models
8/21/00 djt
Nail Top
Standoffs
Nail Side-
Nailing
Flanges
FPC549a
Fig. 12 Fasten replace in position.
Installing the
Chimney System
Start by attaching the rst chimney section to the collar on
top of the replace.
Install the pipe as pictured in Figure 13. When you get
a good lock, you will hear the pipe clearly snap together.
Once sections are snap-locked in place, it is extremely
difcult to get them apart. Make sure the pipe is rmly
snapped and locked together as each pipe section is
mounted.
UP
FPC558a
BFC
Pipe install
Circulating models
8/21/00 djt
Pipe Section
Pipe
Rim
Hem
Lance
Pipe
Hem
FPC558a
Fig. 13 Install pipe, listening for the snap-lock to fasten.
When installing elbows, only outer pipe will snap- lock.
Middle pipes simply slide into position. Be sure to always
attach straps on upper elbow to a structural framing mem-
ber. (Fig. 14)
Continue installing the pipe as required until pipe is installed
up through the ceiling. At this point, you must install a
restop spacer.
FP270/271
CR Series
2/19/99 djt
Support Structure
Ceiling Hole
Framing
Elbow Strap
(must be tight)
Angled Firestop
Chimney Support Strap
(must be tight)
Elbow Strap
Angled Strap
FP270/271
Fig. 14 Attach straps to a structural framing member.
Installing the Firestop Spacer
in the Ceiling Hole
A restop spacer is used to keep pipe spaced properly and
required for safety.
Nail the restop spacer (at each corner) to the framing
members of the ceiling hole. NOTE: A restop spacer is
not required at the roof.
Hole sizes listed in Figure 10 for angled restop spacers
provide minimum required air space to chimney pipe for
ceiling thickness up to 8” (203 mm). When combined
thickness of ceiling material, ceiling joists and ooring
material exceeds 8” (203 mm), adjustments must be made
in framing to assure that minimum air spaces to chimney
are maintained.
Proper Firestop Spacer Installation
Figure 15 shows different installation procedures for both
an area that is an attic and an area that is not an attic.
If the area above the ceiling is not an attic, position the
restop spacer with the ange on the ceiling side and the
angled portion extending up into the hole.
If the area above the ceiling is an attic, position the restop
spacer with the ange on the top of the framed hole and
the angled portion extending down into the hole.
Firestop spacers are not available for, nor are they required
on vertical walls.
DO NOT put any sealant around the area where the outer
pipe slides through the restop spacer. If you seal this
area, it may cause a re hazard.

12
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
FP593
SR/C
11/20/97
Nails (4)
Firestop
Spacer
Joist
Firestop
Spacer
Nails (4)
Joist
Attic Installation Ceiling Installation
FP593
Fig. 15 Installing restop spacer.
NOTE: If the attic insulation shield is used, the
restop is not required in the attic installation.
Continue Installing
Pipe to Complete Run
Continue attaching pipe sections to complete system to
next level always being careful that the pipe is rmly snap-
locked in place before proceeding to next pipe section.
Chimney Supports
If chimney supports are required, they are installed the
same as elbows. Nail chimney support straps to adjacent
structural framing, as shown on Page 8, Figure 8. Bend
straps as necessary and make sure they are secure so
they will support the weight of the chimney. A chimney
support is 2Z\x" (64 mm) long when installed. Consider this
dimension when determining how many straight chimney
sections are needed.
NOTE: Chimney supports are generally used in long runs
in a chase installation.
Additional Ceilings
If you encounter additional ceilings, repeat same steps
required for rst ceiling installation. See restop illustration
in Page 11, Figure 15.
Penetrating the Roof
Run pipe to rooine. Since chimney system must be vented
to the out-of-doors, you must use an approved Vermont
Castings Group termination.
If a chase is used, refer to the installation manual provided
with the termination cap.
Locate Chimney Centerpoint On Roof
Use same procedure detailed in locating center point of
the ue system.
Drive a nail up through roof at the center point. This will
determine center point on outside of the roof.
Cut and Frame Roof Hole
Size of roof hole varies with the type of chimney termina-
tion installed. Refer to installation instructions provided
IGF263
MBUF
5/9/96
Attic Insula-
tion Shield
Nails
(4 required)
Attic Joist
Ceiling
Base Flanges
FP263
Fig. 16 Attic shield installation (Canadian requirement).
Canadian Requirements
for Insulation Shield
In Canada, an attic insulation shield is required to pre-
vent attic insulation from contacting the chimney section.
NOTE: If the attic insulation shield is used, the restop is
not required in the attic installation. Framing dimensions
for the chimney hole should measure 17Z\x” x 17Z\x” (445 x
445 mm). An attic shield MUST be installed on top of attic
joists (above the oor level). (Fig. 16)
NOTE: In the U.S., it is a good idea, although not always
required, to install an attic insulation shield where blown-in
insulation is planned to be used in the attic.
Install the attic insulation shield with the anges on its base
extending down into the framing hole. Nail each corner
of attic insulation shield to the framing members of the
ceiling hole using 8d nails. Attic shields are not required
at the roof.

13
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
Finish Wall
Finish the wall with material of your choice. Do not install a
combustible mantel shelf less than 12” (305 mm) above
the grille opening. Do not install a mantel face plate less
than 6” (159 mm) from top of grille opening. (Fig. 20)
If a combustible material is used below a at mantel shelf,
consult your local building codes for minimum clearance
from top of replace opening to bottom of mantel shelf.
All joints (top, bottom and sides) where wall or decorative
facing material meets replace surround must be com-
pletely sealed with a noncombustible material. (Figures
18 and 19)
NOTE: No side wall protection is required for replaces
installed at 45° to two (2) side walls (corner installation).
with Vermont Castings Group chimney termination to nd
correct size of roof hole.
There must be a 1Z\x” (38 mm) air space between outermost
portion of chimney sections and any adjacent combustible
surfaces. (Combustible surfaces include burnable materi-
als such as: ceiling members, joists, ooring, combustible
insulation and roof structures.)
WARNING: Do not pack required air spaces with in-
sulation or other materials.
Mark an outline of the roof hole around the center of the
point nail. NOTE: Hole dimensions given in the chimney
top installation instructions are horizontal dimensions;
therefore, the hole size must be marked on the roof ac-
cordingly.
Cover the opening of the installed chimney so debris can-
not get into the system.
Cut and frame the hole. It is good practice to use framing
lumber that is the same size as the rafters. Install the frame
securely because the chimney top and ashing anchored
to the frame must be able to withstand heavy winds.
Install Remainder of Chimney Sections
Since you have already preplanned the height of your
termination according to the Ten Foot Rule, continue to
install pipe to the predetermined height.
Check the chimney top installation instructions for details
on how high above the roof top the chimney sections (all
pipes) should extend.
Installing Top Housing
or Termination
Follow the installation instructions provided with the
Vermont Castings Group chimney termination you have
selected.
Installing Chimney in a Chase
Refer to Page 4, Figure 2 for an illustration of a typical
chase installation.
CAUTION: Treatment of restop spacers and construction
of chase may vary with type of building. These instructions
are not a substitute for local building codes. You must
check your local building codes to determine specic re-
quirements for your city or state. NOTE: Other building
materials may be required in addition to restop spacers.
Finishing
CAUTION: All joints between the nished wall and the
replace surround (top/sides) must be sealed with non-
combustible material to prevent cold air leakage into the
room. Only noncombustible material may be applied to
the facing of the replace surround. (Black painted area)
(Fig. 17)
FRONT VIEW SIDE VIEW
Air Space Clearances
FPC559a
BFC
AIR SPACES
circulating models
8/21/00 djt
Standoff
Combustible framing material MUST NOT
penetrate AIR SPACE (shaded areas).
2”
Z\x” air space to
sides
Firestop
1” Air
Space to
Back
Z\x” Air
Space to
Sides
0” Clearance to
Floor
Hearth Extension
Only noncom-
bustible material
may be applied as
facing to the black
replace surround.
Wall
Shield
FPC559a
Fig. 17 Minimum clearances to combustibles.

14
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
MA81
rev. 8/5/97
1Z\x"
Ref. B
C
Combustible materials are
permitted within a shaded area
shown in Figure 21 titled
Minimum Wall Clearances.
*
* *
MA81
Fig. 19 Combustible mantel clearances.
* 12” from top of grille opening.
** 6” from top of grille opening.
Face Plate
FP531b
mantel clearances
9/03 djt
Z\x"
12"
(305mm)
Max.
12" (305mm)
Min.
1Z\x"
(38mm)
6"
(159mm)
Min.
Fig. 18 Mantel clearance.
Combustible
Mantel Shelf
and Trim Finished Wall
Stud
Standoff
Circulating
Front
Noncombustible
Material
Fireplace Opening
2 x 4 Stud
Finished Wall
Must be sealed with noncom-
bustible material
Fireplace
Front
Side View
FP531b

15
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
Side Wall Protection
Adjacent combustible side walls that are within minimum
dimensions shown in Figure 23 of the replace opening
must be protected with a specically built wall shield as
described in Figure 17.
The special wall shield design described in Figure 18 is
an alternate method of adding protection to side walls. Rt
must =1.09 minimum.
Examples of wall shield insulation:
1. Manville - CERAFORM 126, K=.27,
1/2 inches thick
2. EH2416, K = .458,
1 inch thick required.
Hearth Installation
A hearth extension is required to protect a combustible oor
in front of the replace. Refer to Figure 20 for minimum
dimensions and mounting detail.
Note: Hearth Extension must not cover the air inlet
opening of a replace.
The hearth extension described in Figure 20 must be a
durable non-combustible material with a minimum (total)
Rt value of 1.09; refer to Figure 21 for examples. The
overall height (above a combustible oor), depth and width
must be as indicated, with the extension centered to the
replace opening.
The top of insulation must be covered with a non-combus-
tible decorative covering or a piece of .018” minimum sheet
metal, to protect hearth extension material. (Fig. 20)
Secure the hearth extension to the oor to prevent shift-
ing, using trim molding or other similar means at three (3)
outer edges. Seal crack between the replace hearth and
hearth extension with a non-combustible material. (Figs.
20 and 22)
WARNING: Hearth extension must be installed in ac-
Minimum Wall Clearances
WITH
Noncombustible
Surround Facing
WITHOUT
Noncombustible
Surround Facing
Minimum Hearth Extension Dimensions
(for On-Site Construction)
G
HG
J
Seal cracks
between the
fireplace
and hearth
extension with
noncombustible
material
Safety strips
must overlap
56O" minimum
May install
noncombustible
decorative
covering
OR .018" min.
sheet metal Fireplace
Hearth
Combustible
Floor
1/2” Min.
EH2416 or
equal “R”
value
4" MIN.
FP594b
BFC combustible min.
8/21/00 djt
Firebox
Opening
A - Min. clearance
to combustible
perpendicular wall
B - Min. clearance
to combustible
perpendicular wall when
using noncombustible wall shield*
Side
Wall Side
Wall
F**
C**
E
ED
4" Brick
(Example material)
Combustible material permitted within shaded area.
* Noncombustible wall shield requires 1" EH2416
insulation (minimum R Value = 1.85) between decorative
noncombustible rigid covering and combustible wall.
Minimum height and width is 40" x 40".
** Dimension/degree of angle will vary depending on thickness
of noncombustible surround facing.
Shaded area
starts 1/2" from
away from edge
of unit 4"
FP594b
Fig. 20 Combustible side wall protection and hearth extension dimensions.
A B C D E F G H J
BFC36 26” 12” 17° 25° 12” 8” 8” 18” 47Z\v”
660 mm 305 mm 305 mm 203 mm 203 mm 457 mm 1200 mm

16
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
cordance with Figure 22 and must not cover the bottom
front opening of the circulating model.
Alternate noncombustible materials may be used providing
the (total) thermal resistance (Rt value) of the alternate
material employed is greater than or equal to R = 1.09
Thermal resistance (R) or thermal conductivity (K), may be
obtained from manufacturer of the material. Factors are
related by the formula K = 1/R. (Fig. 21)
T = given thickness
R = thermal resistance for a given thickness (T)
K = thermal conductivity
Noncombustible material with a lower R value may be
used, provided thickness of material is sufciently greater
to maintain an equivalent (total) thermal resistance (Rt).
COMMON MATERIALS AND FACTORS
MATERIAL K* R MINIMUM
THICKNESS
EH2416
Micor 300
Common Brick
0.458
5.0
1.09 0.50 in.**
0.10 5.46 in.**
R Value is for 1/2 inch.
* Units of K = BTU/SQ FT/HR/˚F/IN
** Thickness of Listed Material
FP533ADD
Addendum
6/1/99 djt
8/4/99 changed .2 to .1
one inch to 1/2 inch djt
FP533ADD
Fig. 21 Hearth extension material factors.
Example of Determining Hearth Extension Equiva-
lents
To determine the thickness required for any new mate-
rial:
NEW K of new material (per inch) thickness
required = --------------------------------------- X of listed
thickness K of listed material (per inch) material
Example for Common Brick
T (new) = 5.0/0.458 x 0.50 in. = 5.46 in. (new required
thickness).
FP550
BR/BC - SEALING
DETAILS
9/29/97
Wall Covering
Noncombustible
Decorative Fac-
ing
Seal all cracks
between replace
surround and wall ma-
terials with noncom-
bustible material.
Noncombus-
tible Decorative
Covering
Hearth Exten-
sion Insulation
2 x 4” Header
- Do not notch at
standoffs
Seal crack between
replace and hearth
extension with noncom-
bustible material
Safety Strips -
Must be overlapped 1/2”
minimum
Side View
FP550
Fig. 22 Sealing gaps.
KT108b
BFC
Correct door position
8/23/00 djt
Correct Wrong
Fig. 23 Correct door position.
KT108b
Glass Door Operation
The BFC36 is intended for use only with the doors fully
closed. (Fig. 23)

17
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
Installing Line for Gas Logs
Vermont Castings Group replaces are designed to accept
a 1/2” (13 mm) gas line for installation of an approved gas
appliance. (Vermont Castings Group manufactures a wide
variety of gas logs for use in Vermont Castings Group
replaces.)
Be sure to have the appliance installed in accordance with
building codes.
Gas connection may enter from either left or right side of
the replace.
Locate appropriate gas line in the outer casing of replace
and remove insulation from gas line tube. (Fig. 24)
From inside the replace, locate the knockout on the re-
brick -- be sure you are on the appropriate or “gas line” side
of the replace. Using a at bladed screwdriver or small
chisel and hammer, carefully tap around the knockout until
it loosens and falls out.
Install 1/2” (13 mm) certied gas pipe through opening.
After gas pipe installation is complete, use insulation that
was removed from gas line tube to repack space around
the pipe. Material should be inserted from outside of the
replace and packed tightly to totally seal between the
pipe and tube.
NOTE: Gas pipe should not come in contact with any
wood structures until it has reached a point at least 1”
(25 mm) away from replace side.
1"
Min.
FP560a
BFC
Gas line knockout
8/00
1/2"
Hole in Outer Casing
Gas Line
Tube
Ceramic
Knockout
Supply
Line
Repack Insu-
lation
Hole in
Outer Cas-
ing
Ceramic Knockout
(both sides)
FP560a
Fig. 24 Gas line access.
Fireplace Top View
Operation
Before the rst re, the location of the upper refractory
bafe (ceiling panel) should be checked. This part oats
intentionally and may move out of place during shipping
or installation of the replace. If the bafe is out of place,
the resulting improper air ow will cause dirty glass and
improper combustion. The bafe should be centered side-
to-side between the refractory sidewalls and be pulled for-
ward (toward the glass doors) until it rests on the front
sheet metal ledge.
Refer to the publication “How to Enjoy Your Woodburning
Fireplace” for starting and maintaining a wood re.
Note that the BFC36 does not have a damper to open or
close. This is a tremendous efciency increasing advan-
tage since there is no damper to potentially leave open
after a re dies down. House air will not escape up the
chimney. Note also that the doors should remain closed at
all times except when starting or reloading a re.
Burn only seasoned rewood. Typically, only two or three
burning logs are needed to provide efcient supplemental
heat and a bright decorative re. In general, fresh wood
should not be loaded higher than about 2/3 the height of
the rebox.
BTU input of a gas appliance installed in replace should
be rated less than 100,000 BTU/Hr.
Gas pipe installation is intended for connection to a deco-
rative gas appliance only when (1.) incorporating an auto-
matic shutoff device and (2.) complying with the Standard
for Decorative Gas Appliances for Installation in Vented
Fireplaces (ANSI Z21.60) or CSA draft requirements for
Gas-Fired Log Lighters for Woodburning Fireplaces (Draft
No. 4, August 1993).
Decorative gas appliance should be installed in accordance
with the National Fuel Gas Code, ANSI Z223.1/NFPA 54
(latest edition).
CAUTION: When using decorative gas appli-
ance, ue damper must be set in fully open
position. Glass doors on the replace must
also be fully opened.
WARNING: Do not operate an unvented gas
log set in this replace with the chimney re-
moved.
WARNING: When installing an unvented gas
log set, the model CABL or CABR 4” adjust-
able hood must be used.

18
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
647
BFC parts 2008
2/08 djt
1
2
3
5
6
7
8
9
10
11 12 13
14 16
15
19
18
17
4
24
20
22
21
25
23
23
26 27
28
29
Vermont Castings Group reserves the right to make changes in design, materials, specications, prices and discontinue colors and products at any
time, without notice.
BFC Balanced Flue Fireplace
Ref. Description BFC36
1. Top Grille - Painted 3126160
2. Bottom Grille - Painted 3126160
3. Grate Assembly 7579218
4. Left Door Assembly Complete 30004361
5. Right Door Assembly Complete 30004362
6. Rear Firebrick 2353145
7. Side Firebrick (two per replace) 2353146
8. Hearth Firebrick 2353140
9. Nailing Flange (four per replace) 2422198
10. Fiberglas Rope Gasket (Outer Collar) 7547137
11. Top Refractory 2353147
12. Front Brick Retainer 2353163
13. Cable Clip (For Blower Assembly) 7522241
14. Plug Button (two per replace) 7522239
15. Left Door Gasket 20013999
16. Right Door Gasket 20013998

19
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
BFC Balanced Flue Fireplace (continued)
17. Blower Assembly - FKSX-A 20000620
18. Grate Retainer 2353179
19. Junction Box Assembly 3126161
20. Ceramic Glass Panel (two per replace) 30004352
21. Flat Gasket 3/4” Wide (two per replace) 20013997
22. Knob (two per replace) 1600657
23. Bushing (four per replace) 1201895
24. Pan Hd, PH 1/4-20 x 1 Black (two per replace) 1200907
25. Spacer (two per replace) 1600070
26. Spring Clip 30004450
27. #8-18 x 1/2” Decorative Screw 7521180
28. Hinge Spacer (two per replace) 30004360
29. BFC Door Assembly 20014006
Ref. Description BFC36

20
BFC36 Balanced Flue Heat-Circulating Fireplace
7412647
The following accessories for this appliance are available from your local Vermont Castings Group distributor. Should you
need additional information beyond what your distributor can furnish, contact: Vermont Castings Group, 149 Cleveland
Drive, Paris, KY 40361, Attn: Technical Services.
CAUTION: This replace and chimney assembly is a highly engineered system, and, as such, must be operated
only with Vermont Castings Group approved components. If you use an unapproved component to make any
modications, you may create a possible re hazard and will void the Vermont Castings Group warranty. In
addition, such action may void the coverage provided by the owner’s insurance.
Accessories
Hearth Extension Insulation Provides hearth extension oor protection EH2416
Grate for BR/BC36/42 Holds rewood in rebox RBG-BFC36
Hearth Patch Compound Patch cracks in hearth HPC-1
Model NumberDescriptionAccessory
See your Vermont Castings Group Fireplaces
distributor or dealer for nishing Marble and
Mantels, available in a wide selection of styles.