Bellfires BM 21 Installation Manual Download Page 35

Top Down Burn

35

Build the World’s Best Fire

Handy Items to Have

A Fireplace Screen
A Kindling Ax (Be careful)
Stove Gloves
An Ash Rake

Think of your fuel load as three component parts:
The Base Course (can be unsplit if proper diameter)
The Middle Course (split)
The Top Courses (split finer)

THIS TYPE OF FIRE IS NOT RECOMMENDED FOR
THE FIRST EIGHT TO TEN FIRES. BELLFIRES® MUST
BE GRADUALLY BROKEN IN AND CURED WITH
SMALL FIRES FOR THE FIRST EIGHT TO TEN FIRES.

DO NOT OVERFIRE YOUR BCC!!

A fireplace grate is not necessary with the BCC 28. A
grate increases your critical burn rate allowing logs to
burn faster than normal. Logs burn best in contact
with hot firebrick in a bed of wood ashes.

Helpful Hints & Precautions before you start:

Make sure your fireplace and flue have been inspected
for fire worthiness and are cleaned if found dirty (full
of flammable cresosote), by a reputable Chimney
Sweep. Make sure the damper is open. The damper is
controlled from the keyed stainless cable and ring
installed to either side of the firebox sidewall. Pull
down and unhook to release the tension of the stain-
less steel cable. Pull down and rehook the cable to
close the damper. There are no other settings than
completely open or completely closed. If your fire-
place and flue are located on an outside wall or, when
the damper is open, you feel a flow of frigid air rush-
ing down into the room, pre-heat the flue with a sheet
of lit newspaper. Hold the lit newspaper high into the
damper area, wearing a pair of stove gloves for protec-
tion. This will reverse the cold air plug present in the
flue, creating a strong updraft with no smoke into your
room. As soon as the newspaper is burned up, light
your newspaper on top of your fuel load.
Approximately 3-4 hours later when you have a nice
bed of hardwood coals, use a fireplace rake to push the
coals against the rear wall of the firebox. Next, lay your
new logs, minimum of four, on top of the hot coals, lay
the bottom two horizontally. The top two, a little short-
er in length, place front to back approximately 3 inch-
es apart creating a throat.

The greatest volume of smoke and particulate pollu-
tion from a wood fire occurs during a cold start up.

Wood fires lit from the bottom, in a conventional man-
ner, promote a dirty burn and waste a large amount of
potential heat in the form of unburned gases.

A clean and efficient method for kindling a fire is a
top burn. This almost forgotten ancient European tech-
nique places the largest wood at the bottom in a criss
cross crib fashion. As each tier is laid, the criss cross-
ing becomes smaller. Kindling and a small amount of
paper are placed on top and lit.

When the top burn fire is lit, the flames are always
above the fuel load. The smoke and flammable gas
from each tier of wood will always travel up through
the flame and burn, thereby reducing particulate pol-
lution and unburned fuel.

A top kindling fire also produces large and less com-
pacted glowing coals, providing excellent long-lasting
radiant heat.

A top burn fire laid with seasoned hardwood to a
height of eighteen to twenty-four inches will burn
approximately four hours without adding additional
wood. The fire will be mesmerizing as each tier slowly
ignites and burns its way down.

TOP BURN RECIPE

Always start with dry, well-seasoned, split firewood and
kindling. (Ideally seasoned firewood will have a 20%
moisture content. The wood will show radial cracks at
the ends and sound like bowling pins when beaten
together.)

Bottom layer:

Three good sized pieces of split hardwood five to six
inches thick, laid front to back.

Second layer:
Three slightly smaller pieces of split firewood three to
five inches thick, laid side to side.

Third layer:
Four to five smaller pieces of split firewood two to
three inches thick, laid front to back. Keep afternating
and decreasing in size with split hardwood until they
are about one inch thick.

Now alternate two rows with split softwood

(pine, spruce, etc.) until pencil thick. Place a small
piece of newspaper on top and light.

Summary of Contents for BM 21

Page 1: ...BM Models BM 21 BM 25 BM 28 BMR Models BM 21R BM 25R BM 28R Bellfires...

Page 2: ...tory 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...

Page 3: ...hart 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 Dampe...

Page 4: ...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...

Page 5: ...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...

Page 6: ...19 I 23 27 31 J 41 49 49 J tall 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 B...

Page 7: ...1 19 J 23 27 31 K 47 56 K tall 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 BM...

Page 8: ...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 Hea...

Page 9: ...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...

Page 10: ...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 P...

Page 11: ...Bellfires BM BR 11...

Page 12: ...t 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...

Page 13: ...ed 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 mu...

Page 14: ...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 de...

Page 15: ...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...

Page 16: ...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 al...

Page 17: ...Bellfires BM BR 17 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...

Page 18: ...s BM BR 18 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 TAL...

Page 19: ...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 forc...

Page 20: ...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 b...

Page 21: ...A the pre ferred method of installa tion of side flare panels and front stretcher brick would be to rest flares on pad and cut stretcher to matching angles 7 A shows a straight cut stretcher brick wi...

Page 22: ...gle of hearth Make sure the top is level with fire box FIG 7 7B With SUPER CEMENT butter the flare groove the edge of block wing wall and bottom of flare Secure flares in place FIG 7A Cut off excessiv...

Page 23: ...a size per lite with light masonry cement at a ratio of 7 1 7 perlite 1 masonry cement No sand is needed FIG 8 Before adding water mix ingre dients thoroughly Slowly add water bringing mix ture to a p...

Page 24: ...e 1 CER AFOIL is snugged against back of fire box Pour mixture behind fire box tamping lightly in between pours Fill open cores in block wing walls also FIG 8B 8C Note CERA FOIL used as a gasket expan...

Page 25: ...of the masonry canopy so that you can overlap the cor ners Use CERA FOIL tape to adhere CERA FOIL to the canopy Cut 1 4 CERAFOIL in 2 wide strips making a gas ket in between firebox and masonry canopy...

Page 26: ...ing 4 open on out side edge Span across outer edge of wing walls with one 4 x 8 x 56 pre cast concrete lintel FIG 11 Pour the void between lintel and masonry dome with per lite mixture Lay the sec ond...

Page 27: ...Bellfires BM BR 27 Lay one block on each wing wall filling the gap FIG 11 on top of offset Lay a coarse of 4 block leveling off the top Don t forget brick ties for the veneer work FIG 11B 11C...

Page 28: ...d with perlite mixture FIG 12A 12B From this point up the chimney is built in a nor mal fashion although the void between the filler block and the liners should be filled with per lite mix This assure...

Page 29: ...directions Install refractory dome on top of firebox aligning inside back walls flush on both units Fig 9 Make sure the CREA FOIL pieces are 1 larger than the outside walls of the masonry dome so you...

Page 30: ...T refractory mortar butter top of refractory dome Fig Place refractory turbo transition on top of refractory smoke dome aligning inside back walls flush on both units Fig With 1 CERA FOIL insulate aro...

Page 31: ...ock on wing walls leav ing 4 open on outside edge Span across outer edge of wing walls with one 4 x 8 x 56 precast concrete lintel Fig Pour the void between lintel and masonry dome with perlite mixtur...

Page 32: ...d with perlite mixture FIG 12A 12B From this point up the chimney is built in a nor mal fashion although the void between the filler block and the liners should be filled with per lite mix This assure...

Page 33: ...les of damper don t go any further down 25 3 25 4 Unroll cable dropping it all the way down the flue until cable reaches the firebox The important installation step to be observed is as fol lows check...

Page 34: ...by pulling cable until slight tension is felt 26 3 Cut stainless steel wire about 12 inch lower than the horizontal bar of bracket 26 4 Take opposite end to ring of stainless steel chain and slide it...

Page 35: ...imum of four on top of the hot coals lay the bottom two horizontally The top two a little short er in length place front to back approximately 3 inch es apart creating a throat The greatest volume of...

Page 36: ...s Chimney Maintenance CREOSOTE Formation and Need for Removal When wood is burned slowly it produces tar and other organic vapors which combine with expelled moisture to form creosote The creosote vap...

Page 37: ...it is not operated in accordance with the oper ation instructions provided at time of purchase and outlined below or if the unit has been removed from the place in which it was originally installed D...

Page 38: ......

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