Bellfires BM 21 User manual

BM Models:
BM 21
BM 25
BM 28
BMR Models:
BM 21R
BM 25R
BM 28R
Bellfires®

Bellfires® BSV
2
A properly installed Bellfires®BM or BMR fireplace and its associated components
form a safety tested system. This manual serves as a guide for the proper and safe instal-
lation of a Bellfires®fireplace. It does not serve as a substitute for the necessary profes-
sional judgment and skills of a trained installer. Instead, it should be used in conjunction
with standard safety considerations including, but not limited to, applicable state or
provincial and local fire codes, the National Fire Protection Association Standard NFPA
211 or Canadian Standard B365, building and inspection codes, and the trained
installer’s professional judgment and skills to provide the owner with a safe installation.
Please save these instructions for any future repairs or use.
Consult the local and state or provincial building and fire safety code officials and
investigate the requirements for installing a factory-built fireplace in the homeowner’s
community. It is the responsibility of the installer to (1) obtain a building permit for
installation of a Bellfires®BSV fireplace before construction begins and, (2) assure the
installation meets or surpasses all minimum requirements of the homeowner’s
jurisdiction.
It is highly recommended the homeowner install a smoke detector.
IMPORTANT SAFEGUARDS AND PRECAUTIONS
Safe and efficient operation of the Bellfires® BM or BMR fireplace and its associated
components mandates installation of this unit in accordance with this installation
guide. Proper installation requires an installer skilled in standard construction tech-
niques. The installer must read and understand the contents of this manual before
starting the installation.
WARNING:
DO NOT PACK REQUIRED AIR SPACES
WITH INSULATION OR OTHER MATERIALS.!!!!
Failure to use components provided or specified by Sleepy Hollow Chimney Supply,
Ltd., manufacturers of Bellfires®, in accordance with this installation guide may create
a fire hazard. Use of other components or misuse of Bellfires® components voids the
Bellfires® warranty.

Bellfires® BM & BMR
3
Important Safeguards and Precautions 2
Introduction 4
Bellfires® Firebox Sizing Chart 5
BM Parts 6
BMR Parts 7
BM,BMR Exploded Views 8-10
BSV Spider Damper Parts 12
Safety Guidelines 13
BM, BMR Steps to Installation 14-28
BMR Specific Installation Steps 29-32
Bellfires® Spider Damper 33-34
Build the Best Fire in the World 35
Operation & Maintenance 36
Warranty 37
Table of Contents

Early fireplaces were very inefficient, drawing a good deal of
the heat up the chimney while admitting an unbearable amount
of smoke into the room. In the late 1700’s, Benjamin
Thompson, Count of Rumford, recognizing that a fireplace
heats an area by radiation, began a series of experiments
aimed at improving its performance.
He discovered through observations and various constructions
that the exaggerated width of the chimney of his time, necessi-
tated by the need for room for a chimney sweep to climb
through the throat area into the flue, was a primary cause of
inefficiency and smokiness. He attributed the problem not only
to the chimney, but the width of the throat and also specific
fireplace dimensions and configurations. Using the knowledge
gained from his studies, Rumford modified the traditional fire-
place design into one that burned cleaner and hotter and,
most importantly, did not smoke. His efforts greatly improved
the performance of the fireplace.
Later, in the 1900’s, a series of scientific experiments were
conducted by Professor Peter O. Rosin, Dr. Ing., under the
auspices of the British Coal Utilisation Research Association.
The results are documented in his report, “The Aerodynamics
of Domestic Open Fires”. Through the use of laboratory equip-
ment, Dr. Rosin was able to observe air and smoke flow pat-
terns and thus developed the ideal firebox and chimney shape
for maximum efficiency. While expanding on Rumford’s work,
some of Dr. Rosin’s findings varied dramatically from
Rumford’s earlier theories; perhaps the most notable being the
smoke shelf theory, shown diagrammatically at the left.
The important point of Dr. Rosin’s work is that it was per-
formed in a scientific manner and pointed the way to a much
more efficient and functional fireplace. Bell of England took
this information and applied it to develop the Bellfire
Fireplace, providing the ideal firebox and throat shape to guar-
antee a smoke-free efficient fireplace capable of producing
maximum radiant heat with minimum fuel. It was commonly
used to heat the complete home until the second World War.
Since then it has been further developed by using more mod-
ern aerodynamic concepts and thermal insulation techniques
to improve the design.
Sleepy Hollow Chimney Supply has optimized the Bellfires®
designs, and produced a superior radiant firebox combining
advanced casting techniques and high temperature, high alu-
mina ladle cast refractory. We feel confident that our
Bellfires® units are the finest heat- producing open fireplaces
to be found, whether used to upgrade old metal or masonry
fireboxes or in new construction.
The Super Vent is the Repair Unit with the addition of a cor-
rectly proportioned Smoke Chamber design, constructed of
type 316 stainless steel for lifetime durability.
The Smoke Chamber is connected to a properly sized round or
oval Super Flex® flexible flue liner. Cera-Foil® space age
insulating blanket insulates the entire Super Vent™ system,
stopping heat transfer to combustibles–the cause of home
fires. In homes where the fireplace is in question for whatever
reason, the Bellfire Super Vent has established itself as a safe,
state-of-the-art, non smoking super radiant fireplace retrofit
system.
A top mounted round damper with a control key at the firebox
level helps to prevent cold air from draining into an unused
fireplace and help ensure a warm flue for instant draft. Super
radiant heat output and thorough combustion provide ample
warmth and fuel efficiency that sets new standards for the open
hearth. The refractory firebox stores heat and warms the house
long after the flames have died out.
Introduction
Bellfires® BM & BR
4

Bellfires® BM & BMR
5
Bellfires® Firebox Dimension Sizing Chart
Bellfires® Quick Reference Chart
Models 21, 25, and 28 (includes tall)
Use this chart to determine
which Bellfires® size firebox
to install.

Bellfires® BM & BR
6
A16” 20 20 ”
B 9 12 12 ”
C 10” 9” 9”
D 11” 13 ” 14”
E 23 ” 26 ” 29 ”
F 25 ” 28 ” 28 ”
Ftall 30 ” 33 ” 33 ”
G 8 ” 8 ” 8 ”
H 17” 21” 19
I 23” 27 ” 31 ”
J 41 ” 49” 49”
Jtall 46 ” 54” 54”
K 20 ” 25 29”
L 31 ” – 42”
M 7” 7” – 8” 8”
N 7” 7” – 8” 8”
O 1” 1” 1”
Q 4 ” 4 ” 4 ”
BM 21 BM 25 BM 28
The Bellfires® cutaway diagram at the left shows compo-
nents necessary for a complete BM installation.
The key above shows specifications for individual models.
Essential Components of a BM Installation

Bellfires® BM & BMR
7
A7” – 8”
B 12” – 14”
C 10” 14” 14”
D 7” 7” 7”
E 16” 18 ” 18 ”
F 32 ” 39 ” 39 ”
G 25 ” 28 ” 28 ”
Gtall 30 ” 33 ” 33 ”
H 9 ” 9 ” 9 ”
I 17” 21” 19 ”
J 23” 27 ” 31 ”
K 47 ” – 56 ”
Ktall 52 ” – 61 ”
L 20 ” 25” 29”
M 31 ” – 42”
N 7” 7” – 8” 8”
O 7” 7” – 8” 8”
P 1” 1” 1”
Q 4 ” 4 ” 4 ”
BM 21R BM 25R BM 28R
The Bellfires® cutaway diagram at the left shows compo-
nents necessary for a complete BMR installation.
The key above shows specifications for individual models.
Essential Components of a BMR Installation

Bellfires® BM & BR
8
16”
9 ” 10”
11”
23 ”
25 ”
BM 21 Tall
30 ”
8 ”
17”
23”
41 ”
BM 21 Tall
46 ”
BM 21 Tall & Standard
20 ”
12 ” 9”
13 ”
26 ”
28 ”
BM 25 Tall
33 ” 8 ”
21”
27 ”
49”
BM 25 Tall
54”
BM 25 Tall & Standard
25”
4 ”
31 ”
4 ”
20 ”
31 ”
4 ”
4 ”
Two Piece Hearth One Piece Hearth One Piece Hearth

Bellfires® BM & BR
9
12 ”
20 ”
9”
14”
29 ”
28 ”
BM 28 Tall
33 ” 8 ”
19 ”
31 ”
49”
BM 28 Tall
54”
BM 28 Tall & Standard
7”
12”
10”
7”
16”
32 ”
25 ”
BM 21R Tall
30 ” 9 ”
17”
23”
47 ”
BM 21R Tall
52 ”
BM 21R Tall & Standard
31 ”
4 ”
20 ”
31 ”
4 ”
4 ”
4 ” 4 ”
31 ”
20 ”
Two Piece Hearth Two Piece Hearth One Piece Hearth One Piece Hearth

Bellfires® BM & BR
10
14”
7”
18 ”
39 ”
28 ”
BM 25R Tall
33 ” 9 ”
21”
27 ”
BM 25R Tall & Standard
8”
14”
14”
7”
18 ”
39 ”
28 ”
BM 28R Tall
33 ” 9 ”
19 ”
31 ”
56 ”
BM 28R Tall
61 ”
BM 28R Tall & Standard
25”
4 ”
4 ” 4 ”
31 ”
20 ”
Two Piece Hearth
One Piece Hearth One Piece Hearth

Bellfires® BM & BR
11

Bellfires® BSV
12
BSV Spider Damper Parts
1- Drop In Damper
28' Stainless Steel Cable
1 -Bracket
2 -Hammer Drive Pins
1- Stainless Steel Sash Chain
1 -Stainless Steel Ring (attach to chain)
1 -Stainless Steel Clamp (attach to cable)
You need....
Ladder
Hammer Drill
1/4 inch Masonry Drill Bit
Safety glasses
Wire Cutters
Marker
Flat Gasket or Silicone Caulk
For use with BMR Bellfires; add to order

Bellfires® BM & BMR
13
A. Bellfires® fireplaces are not approved for use in mobile homes.
B. There must be an air space clearance between the outermost portion of any section of the chimney system and
any combustible surface. Although two inches is a typical clearance, adhere to the requirements set forth by the chim-
ney manufacturer. Combustible surfaces include: ceilings, joists, flooring, walls, electrical wiring, insulation and roof
structures.
C. Never fill any required air space with insulation or other material.
D. The chimney system must be vented to the outside.
E. The chimney must extend at least three feet (900mm) above the roof and at least two feet (600mm) above any
portion of the roof within 10 feet (3m).
F. Maximum chimney height from the top of the firebox to the top of the chimney should not exceed 40 feet when
supported solely by the fireplace, or 90 feet when resupported at or above 40 feet according to the chimney manufac-
turer's resupport specifications.
G. Minimum chimney height from the top of the firebox to the top of the chimney must be 10 feet.
H. The chimney must not be inclined more than 30 degrees from vertical. Greater angles result in hazardous
deposits of soot and ash in flue.
I. A maximum of two offsets (4 elbows total) is allowed in a chimney.
J. Firestops and joist shields must be used at each floor level through which the chimney rises.
K. There should not be any forced air furnace registers in the room within ten feet of the fireplace. They can cause
negative pressure and create chimney down-drafts.
L. Never mix parts of one chimney system with those of a different manufacturer. Do not install damaged chimney
parts. Remember, more fires are caused by chimneys than by solid-fuel appliances.
M. Practice good workmanship. Sloppy work could jeopardize the safety of the installation.
Safety Guidelines
3 feet minimum
2 feet minimum
10 feet or more
3 feet minimum 2 feet minimum
Less than 10 feet
Ridge
Chimney Height Requirements

Bellfires® BM & BR
14
BLOCK AND BRICK SHELL NOT LISTED.
Wing walls: 12-10" X 8" X 16" Block
4- 4" X 8" X 16" Block
2- 4' X8" X 56" Precast concrete lintels
4- Bags perlite for unit only
Brick ties
8" I.D. round flue liners or thimbles.
2- bags light masonry cement.
BM 28 with two piece hearth.
1- masonry pipe adaptor.
1" X 24" X 25’ 8 lb. density CERAFOIL.
1/4" CERAFOIL gasket and hearth pad.
1- ROLL CERAFOIL tape.
1- 2 gallon pail SUPER CEMENT.
Materials List

Bellfires® BM & BR
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READ INSTRUCTIONS CAREFULLY BEFORE BEGINNING.
Thank you for purchasing the Bellfire masonry unit, BM 28 TALL. These
instructions are specified for a 36” finished opening. But dimensions can
be altered to accommodate Models BM 21, BM 25, and the smaller
height units.
After determining the fireplace location, check with municipal codes to
assure proper depth for footing requirements. Pour footer base minimum
4’ wide X 8’ Long X 12" thick using a 5 bag footer mix.
Construct block base minimum 32" X 64" O.D., finished size, up to
desired height of fireplace floor. Allow 4" ledge at ground level for veneer
material, brick or stone. Block width walls should be laid inside of base
for support.

Bellfires® BM & BR
16
Cut the house wall
rough opening at 56”
wide X 60”high.
(FIG.2A) Pour a con-
crete pad on block base
4”-6” thick and level off.
If additional flue cham-
ber is needed at lower
level, build along with
block base to a point
higher than finished
concrete pad. (FIG.2A
2B) The concrete pad
must cantilever into
formed floor joists, 24"
for hearth. The BELL-
FIRE performs best at
floor level although a
raised hearth may be
used.
At this point the brick or
stone veneer and 4”
block back wall is built
to a height of 56" above
concrete pad. Use brick
ties for fastening wing
walls. (FIG.2, 2A)

Bellfires® BM & BR
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Straight edge a pencil line off interior finished walls.
This line is the back of interior veneer material and also
the extension of the BELLFIRE flares.(FIG 2B)

Bellfires® BM & BR
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With 10" block, build two
wing walls against rough
opening, flush with interior
wall and pencil line. Use
brick ties. (FIG.3) Stop wing
walls at nearest block height
above fire box, 40" on BM 28
TALL (FIG.3A)

Bellfires® BM & BR
19
Using a sheet rock
knife, measure and
cut three 33” tall sec-
tions of 1” Cera-Foil
ceramic fibre high
temperature insulating
blanket. Allow 6” addi-
tional width on each
side to insulate firebox
extension flares. Cut
foil side and stand in
place between wing
wall. (Fig. 4, 4A).
Place 1” thick sections of
Cera-Foil in place between
wing walls. This technique
accomplishes the follow-
ing. The ceramic fibre
insulating hot face forces
the refactory firebox to
store more heat, creating
a cleaner and hotter burn-
ing firebox. It also allows
for a thermal expansion
cushion with a built-in foil
faced moisture barrier
when the fireplace is
exposed to the outside.
(Fig 4A).

Bellfires® BM & BR
20
Install the refractory fire
box between wing walls
and position flare exten-
sions for proper
centering. Remove side
flares after firebox is
properly centered.
(FIG.5)
Cut 1/4” CERAFOIL
insulating blanket to
shape of the two piece
hearth, installing
foil face down. (FIG.6)
With masonry saw blade
cut outer piece evenly on
both ends for proper rib
alignment. Install two
piece hearth.
(FIG.6A,6B)