Lennox Brentwood SP User Manual
INSTALLATION AND
TM
OPERATION INSTRUCTIONS
BRENTWOOD™
EPA Wood-Burning Fireplaces
P/N 850,039M REV. G 11/2008
MODEL
BRENTWOOD SP
This installation manual will enable you to obtain a safe, efficient and
dependable installation of your fireplace system. Please read and
understand these instructions before beginning your installation.
Do not alter or modify the fireplace or its components under any circumstances. Any modification or alteration of the fireplace system, including
but not limited to the fireplace, chimney components and accessories,
may void the warranty, listings and approvals of this system and could
result in an unsafe and potentially dangerous installation.
Lennox Hearth Products wood-burning fireplaces are designed for use
as a supplemental heater. They are not intended for continuous use
as a primary heat source.
SAVE THESE INSTRUCTIONS
FOR FUTURE REFERENCE
WARNINGS
• Hot! Do not touch! The glass and
surfaces of this appliance will be hot
during operation and will retain heat
for a while after shutting off the appliance. Severe burns may result.
• Carefully supervise children in the
same room as appliance.
• If small children are present in the home, it
is recommended that this appliance be fitted
with a firescreen kit. See Page 21 for ordering
information.
Listed to standards:
ULC-S610 & UL-127
Report No. 3011202
EPA Cert. No. 537
Fireplace, also for use in mobile or
manufactured homes with solid fuel only.
WARNINGS
• The fireplace cannot be operated without a door.
Consult your dealer to select the correct door
model.
• Important! To assure proper alignment of glass
doors: Install this fireplace in a square and
plumb condition, using shims as necessary at
sides and/or bottom.
• Install the fireplace only as described in these
instructions.
PIBRENTW REV. 11 NOV 2008
IMPORTANT! GENERAL SAFETY
PRE CAUT IONS . REA D AND
UNDERSTAND THESE SAFETY
RULES BEFORE YOUR FIRST FIRE.
WARNING
THE FIREPLACE MUST BE OPERATED WITH THE DOOR FULLY
OPENED OR DOOR FULLY CLOSED.
IF THE DOORS ARE LEFT PARTLY
OPENED, GAS AND FLAME MAY BE
DRAWN OUT OF THE FIREPLACE
OPENING, CREATING RISKS OF
BOTH FIRE AND SMOKE. IF THE
UNIT IS OPERATED WITH THE
DOORS FULLY OPENED, THE
OPTIONAL FIRE SCREEN MUST
BE USED.
WARNING
NEVER use gasoline, gasolinetype lantern fuel, kerosene,
charcoal lighter fluid, naphtha,
engine oil or similar liquids to
start or “freshen up” a fire in this
fireplace. Keep any flammable
liquids a safe distance from the
fireplace at all times.
WARNING
THIS FIREPLACE HAS NOT BEEN
TESTED WITH AN UNVENTED
GAS OR A FIREPLACE INSERT.
TO REDUCE RISK OF FIRE OR
INJURY, DO NOT INSTALL AN
UNVENTED GAS LOG SET OR
FIREPLACE INSERT OR OTHER
PRODUCTS NOT SPECIFIED FOR
USE WITH THIS FIREPLACE.
WARNING
Never leave your fireplace unattended while it is burning.
WARNING
To avoid the risk of damaging
fireplace materials and increasing the risk of fire, do not use the
fireplace to cook or warm food.
2
WARNING
Use care when selecting window
treatments for windows located
near the fireplace. Avoid using
combustible flowing window
treatments such as curtains on
nearby windows that are of sufficient length to be blown in front
of an open flame when the window
is opened. Keep any combustible
furniture, materials or decorative
pillows at least 48" (1219 mm)
from the front fireplace opening.
WARNING
Never modify or alter your fireplace
system in any way. To do so may
create a potential fire hazard and
void the Limited Warranty.
IMPORTANT
When burning wood, use SOLID
NATURAL DRY WELL-SEASONED
WOOD ONLY. Hardwoods are recommended (soft woods tend to burn
very quickly).
• DO NOT burn treated wood,
charcoal, coal, trash, cardboard,
driftwood, woods dipped in tar,
Christmas tree greens, pitch, pine
tar, creosote, chemical chimney
cleaners, flame colorants, polystyrene packaging, wood products with synthetic binders (i.e.
plywood). Plywood, lumber and
other misc. materials can produce
abnormally high temperatures,
sputtering and smoking fires and
may contain hazardous chemicals
to treat insects and fungus.
• Burning unapproved fuels can
produce excessive temperatures,
beyond the design capabilities
of the fireplace and may produce
excess sparks or may contain
hazardous chemicals. Burning
unapproved fuels can result in
a chimney fire, a house fire,
personal injury, death or loss of
property.
WARNING
Never leave children unattended
when there is a fire burning in the
fireplace.
WARNING
Always ensure that the air inlet to
the fireplace is free from debris
and any other obstructions that
can block the entrance of air.
IMPORTANT
WHEN INSTALLED IN A MOBILE OR
MANUFACTURED HOME:
• Mobile or manufactured home
installations must be installed in
accordance with the requirements
of the Department of Housing and
Urban Development (HUD) “Mobile
Home Construction and Safety standards” for US or Canada Mortgage
and Housing Corporation (CMHC)
for Canada.
• The fireplace must be fastened to
the floor by unfolding and screwing
the small tabs on both sides at the
bottom of the fireplace.
• It is necessary to have access
openings, for inspection purpose
only, into built-in enclosures surrounding the fireplace installation.
Such openings to require a household tool for access.
• The vapor barrier of the mobile
home shall be as close as possible
of the location where the chimney
assembly penetrates the ceiling
and roof structure with no interference to the required clearance to
combustible material.
• When the mobile or manufactured
home has a flat roof, the Attic Radiation Shield must be installed from
below going through the roof (See
Figures 19b and 19d).
• Warning: Do not install in a
sleeping room
WARNING
Neither the manufacturer nor the
seller warrants “smoke free”
operation nor are we responsible for inadequate system draft
caused by mechanical systems,
general construction conditions,
inadequate chimney heights,
adverse wind conditions and/or
unusual environmental factors or
conditions beyond our control.
CONGRATULATIONS!
In selecting this Lennox Hearth Products wood-burning appliance you have chosen
one of the finest fireplaces available. The Brentwood™ fireplace is a clean burning EPA
certified fireplace that is designed to provide you dependable service as well as warmth
and enjoyment for many years to come.
Please carefully read and follow all of the instructions found in this manual. Please pay
special attention to the safety instructions provided in this manual. This information
will be useful to you now and in years to come, so keep the manual handy and refer to
it as needed.
TABLE OF CONTENTS
Safety Rules and Specifications for
Mobile or Manufactured
Home Installation .........................Page 2
Introduction ...................................... Page 3
Parts Required .................................Page 3
Optional Equipment ...........................Page 3
Operating The Fireplace ....................Page 3
Fuel ...................................................Page 3
Combustion Control ......................... Page 4
Refueling For Best Performance .......Page 4
Smoking – Causes And
Troubleshooting ..............................Page 4
Important Cautions ........................... Page 5
Maintaining Your
Brentwood Fireplace .......................Page 5
Chimney Maintenance .......................Page 5
Dealing With A Chimney Fire .............Page 5
Finish Door Casing Care ....................Page 5
Disposing of Ashes ...........................Page 5
Refractory Installation .......................Page 6
Door Installation ...............................Page 6
Door Adjustment ...............................Page 6
Glass Care - Replacement .................Page 7
Glass Care - Cleaning ........................Page 7
Gasket Replacement ........................Page 7
Fireplace Installation ........................Page 7
Locating The Brentwood ...................Page 7
Framing, Facing And Mantel ..............Page 8
Hearth Extension Requirements .......Page 8
Cold Climate Installations ..................Pate 8
Fireplace and Framing Dimensions ...Page 9
Hot Air Ducting Installation ..............Page 11
Gravity Kit ......................................... Page 11
Outside Air Kit .................................. Page 13
Chimney System ...............................Page 14
Chimney Installation Notes ...............Page 14
Chimney Installation Instructions ......Page 15
Offset Chimney Installation ...............Page 16
Angled Wall Radiation Shield ............Page 18
Chimney Support Installation ............Page 19
Chimney Chase And
Multiple Terminations...................... Page 19
Chimney Adaptor ..............................Page 19
Masonry Application Instructions .....Page 20
Installation Accessories ....................Page 21
Chimney Components Lists .............. Page 21
Replacement Parts ............................Page 23
Specifications ....................................Page 23
Clearances ........................................Page 23
Product Reference Information .........Page 24
THE FIREPLACE
INTRODUCTION
The Brentwood wood-burning fireplace is an
energy efficient, heat circulating, closed combustion fireplace. You will receive a lifetime
of comfort and enjoyment from your fireplace
provided it is installed, maintained and operated properly.
• Please read these instructions and retain
this manual for future reference.
• Before beginning the fireplace installation,
consult the local authorities to obtain your
building permit and check your local building
codes. Install the fireplace only as described
in these instructions and using only Lennox
Hearth Products components.
• The Brentwood fireplace is not intended for
use with a gas log set. Do not use a fireplace
insert or any other product with this fireplace
unless it is specified by Lennox for use with this
appliance. Failure to follow these instructions
will void the certification and the warranty of
the fireplace and may result in an unsafe
installation.
• Lennox Hearth Products wood fireplaces are
designed for use as a supplemental heater.
They are not intended for continuous use as
a primary heat source.
PARTS REQUIRED
Fireplace Model Brentwood SP
• 6” diameter chimney - model ASHT, S-2100+,
HT6000+, HT6103+ or AC manufactured by Security Chimneys International only, including:
- Chimney lengths
- Elbows (where necessary)
- Associated components as per these
installation instructions
• .Decorative Cast Iron Door - Required
...(Order Separately)
- Available in black, gold or brushed nickel
(see Page 21)
• .Outside air kit (Included w/Fireplace)
OPTIONAL EQUIPMENT
• Additional Equipment (optional)
- AC Chimney Adaptor
(required if using AC Chimney)
- AC chimney outside air kit
- Gravity venting system
- Panel for clean face option
(only with gravity venting system)
- Rigid firescreen
- Fireplace Blower Kit
- Blower Speed Control
OPERATING THE BRENTWOOD FIREPLACE
Fuel
USE SOLID NATURAL WOOD FUEL ONLY. The
Brentwood fireplace is designed to work best
when fueled with dry seasoned natural wood
only. Hardwoods are preferred to softwoods
since the energy content of wood is relative to
its density. Hardwoods will result in a longer
burning fire and less frequent refueling. A
moisture content of 15% to 20% (seasoned)
is recommended. Wood that has been cut and
split and let to dry under a cover for a period
of one year will usually meet that criteria.
Excessively wet wood will be difficult to burn
and will result in lower efficiency, increased
creosoting and deposits on the glass and in
the chimney. Excessively dry wood will burn
well but will also have higher emissions and
shorter burning time.
Do not burn scrap or garbage, treated wood or
wood such as driftwood from the ocean which
has been exposed to salt or other chemicals.
Salt or chemicals can corrode the firebox and
chimney. Do not burn large amounts of paper,
cardboard, Christmas tree branches or building construction materials. Intense firing with
these materials may overheat the fireplace,
causing damage to the unit, a fire or even
possibly igniting a chimney fire if the chimney
is creosoted.
First Fires
Before using the fireplace make sure to remove the plastic wrapping and EPA label on
the door. Remove any glue residue left by the
label using mild soap.
The first five or six fires should be small fires of
short duration (about 30 to 60 minutes). This
will help cure the refractory bricks. The first
fires may produce slight smoking and some
odor due to curing of the paint and steel and
the burning off of dust accumulated on the
fireplace will burn off at this time. It may set off
a smoke alarm located in the same room. For
this reason the room should be well ventilated
for the first few fires.
WARNING
Be careful adding wood fuel to the
fire or handling fireplace tools such
as shovels, tongs or pokers.
WARNING
The bottom refractory can be
cracked by excessive abuse such
as tossing heavy logs onto the
grate or gouging with fireplace
tools. Exercise caution when
adding wood to your fireplace.
3
Building a Fire
(starting and maintaining a fire)
To start a fire, place several crumpled up balls of
newspaper in the firebox. Place small dry pieces
of kindling on top of the paper, criss-crossing
the kindling so that there are air spaces in between. Keep the fuel far back enough so that air
can get underneath. Open the air controls fully
and light the newspaper. Once the newspaper
and the kindling is well ignited, close the door.
Once the kindling fire is well established, cord
wood can be added (see Primary Air Combus-
tion Control section for proper operation of the
air controls).
The unit will burn best with 2-3 pieces of cord
wood spaced 1 to 2 inches apart and allowing
air to get under the fuel. Criss-crossing or arranging the fuel so that air can get underneath,
will help the fire to get started easily. The unit
should be operated with the air control fully
open long enough to get the cord wood well
ignited.
COMBUSTION CONTROLS
Primary Air and Air Boost Controls
There is no flue damper in the Brentwood™
fireplace. As is common with air tight stoves,
the combustion air control sets the flow of air
entering the firebox. This allows for a more
precise control of the fire. The combustion air
control is located below the door on the left side.
The main source of air (primary air) entering
the firebox can be diminished by moving the
air combustion control from left to right. The
primary air is fully opened when the air control
is completely moved to the left. The air control
device can also be used to add an extra boost of
air especially during fire start up and reloading
of the unit. Pulling the air combustion control
will induce an air boost at the base of the fire
allowing an easier fire start up. When the fire is
well established, the control can be pushed in
to shut down the air boost allowing for a longer
burn time. The combustion air control should
be in the closed position (primary air and air
boost) when the fireplace is not in use. This
will minimize air leakage up the chimney. The
combustion air control should be opened before
opening the door to minimize the possibility of
back draft coming into the room.
Accelerated Combustion
The maximum heat output for the Brentwood™
fireplace is achieved by burning with the door
closed and the combustion air opened and
pulled out. By this method, the Brentwood
fireplace can produce up to 55,000 BTU of
heat per hour. However, it will be necessary
to reload with wood every one or two hours.
This is the least efficient method of burning the
Brentwood fireplace.
Push to Close
Air Boost
Pull to
Open
Air Boost
Slow
Medium
Accelerated
Figure 1
Use caution when firing with the combustion
air control wide open. Only burn cord wood in
this manner. Small dry pieces of softwood and
construction scraps will burn very intensely using this method and may damage the firebox.
Medium Combustion
This is the recommended mode of operating
the Brentwood fireplace and should be the
one normally used since it will deposit the
least amount of creosote on the glass and
in the chimney. The combustion air control
must be 3/4 closed and pushed in to close the
air boost. The precise setting will depend on
many factors, including chimney length and the
moisture content of the wood.
For instance, a long chimney will necessitate
closing the damper more. To obtain the proper
combustion, close the damper completely, then
open it about 1/4” to 1/2”. Three medium size
pieces of wood should be burning on a bed of
hot coals. The heat output will be approximately
30,000 BTU per hour and the loading time will
be about every 3-4 hours. Softwoods may be
burned using this method but the time will be
substantially reduced.
Slow Combustion
When the air combustion control is completely
closed, the fireplace is in a slow combustion
phase. If the hearth is hot enough, slow combustion will not extinguish the fire, but there will be
a noticeable change in the flame pattern. The
flames will be slow and may appear dirty if the
wood is too wet (moisture content of 20% and
more). Do not allow the wood to burn without
flame, since this will produce excessive creosote
in the unit.
Creosote may accumulate on the glass door.
This method of burning should be used only
after operating the Brentwood fireplace with
the air control opened to produce a hot fire for
about an hour or at medium pace for at least
three (3) hours. Slow combustion can be used
at night in order to reduce the heat output and
to prolong the burn. The loading time will be
between 6-8 hours.
REFUELING FOR BEST PERFORMANCE
The Brentwood fireplace will operate best if
attention is given to operating the unit with the
damper fully opened after refueling in order
to bring the firebox and the chimney system
up to their optimum operating temperature.
Combustion efficiency is relative to firebox
temperature. A temperature of 500º C (932º F)
and up, with a visible flame, in the upper part
of the firebox indicates a maximum efficiency.
To obtain this temperature, the fireplace must
be operated with the primary air and air boost
controls fully opened during 10 to 20 minutes
after reloading, depending on the heat and on
the moisture content of the wood.
Once you have reached the desired temperature,
the air boost can be closed and the primary air
set to a medium setting. You know you have
reached the desired temperature when, closing
the primary air control, you can see a flame
at the top of the firebox. The benefit of this
technique will be cleaner glass, less creosoting,
greater efficiency and the most pleasing fire for
your enjoyment.
SMOKING –
CAUSES AND TROUBLESHOOTING
To reduce the likelihood of smoking when opening the door, set the combustion air controls to
the left before opening the door. Your fireplace
has been designed and tested to provide smoke
free operation. Occasionally, there may be a
small amount of smoking upon lighting the fire,
until the chimney heats up but this should not
continue. If the fireplace continues to smoke it
is probably for one of the following reasons:
A. Negative pressure in the house
As the fire burns, air goes up the chimney.
This air must be replaced through leakage
into the house or through the outside air duct.
When operating the Brentwood fireplace,
open a nearby window temporarily to check if
there is adequate replacement air supply.
4
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
B. Blowers operating (e.g.: range hood)
These blowers draw air out of the house and
may actually cause a negative pressure in
the house. Turn off all blowers and open a
nearby window to determine if this is the
cause of the problem.
C. Wet wood
Wet or tarred wood will smoulder and smoke
instead of burn properly.
D. Dirty or blocked chimney
Check to make sure the chimney is clear and
clean.
E. Chimney not long enough
The minimum chimney height is twelve (12)
feet (3.7 m) not including the fireplace height.
The chimney must extend at least three (3)
feet (915 mm) above its point of contact with
the roof and at least two (2) feet (610 mm)
higher than any roof or wall within ten (10)
feet (3 m) of it. When installed with offsets,
the minimum chimney height is fifteen (15)
feet. Additional height will increase draft and
will decrease the tendency to smoke.
F. Poor chimney draft
With no fire, there should be sufficient draft to
exhaust cigarette smoke introduced under the
baffle. Chimneys installed against an outside
wall without protection may generate back draft
problems which will cause start-up problems.
To prevent this, open a nearby window, roll up
a piece of paper and light it. Then, hold it in
the upper part of the firebox to warm up the
chimney. Wait until the draft is sufficient, then
start the fire.
IMPORTANT CAUTIONS
A. Do not block the hot air vents to the fire-
place as this will cause the fireplace to
overheat.
B. Never use gasoline, gasoline-type lantern
fuel, kerosene, charcoal lighter fluid, or
similar liquids to start or ‘freshen up’ a fire
in this fireplace. Keep all such liquids well
away from the fireplace while it is in use.
C. Do not burn coal. The sulphur in coal will
corrode the firebox.
D. Do not burn driftwood which has been in the
ocean or salt water. The salt will corrode
the firebox and chimney.
E. Do not burn wood in the area in front of the
grate.
F. Do not abuse the unit by burning paper, or
cardboard or construction material such as
pressed wood, plywood or lumber. Wood
protectors, metallic paper, coal, plastic,
waste, sulphur and/or oil will damage the
fireplace.
G. Do not allow the wood to smoulder or burn
without flame, since this will produce
excessive creosote in the unit.
MAINTAINING YOUR FIREPLACE
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 vapors condense in the relatively cool
chimney flue of a slow-burning fire.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
As a result, creosote residue accumulates on the
flue lining. When ignited this creosote makes
and extremely hot fire.
The chimney shall be inspected at least twice
a year during the heating season to determine
when a creosote buildup has occurred.
When creosote has accumulated it shall be
removed to reduce the risk of a chimney fire.
When the creosote accumulation is large, a
creosote fire in the chimney can damage the
chimney and overheat the surrounding wood
framing. Creosote formation in a chimney can
be minimized by making sure there is always
visible flame burning, avoid smouldering fires
and by proper refuelling techniques.
Chimney Maintenance
Regular chimney inspection and maintenance
combined with proper operation will prevent
chimney fires. Keep your chimney clean. Do not
allow more than 1/16” (1.6 mm) creosote build
up in your chimney. The amount of creosote will
depend on variables such as frequency of use
and type of fire. We recommend that you:
A. Initially inspect the chimney system weekly.
From this, you will learn how often it will be
necessary to clean your chimney.
B. Have your chimney cleaned by a qualified
chimney sweep. If you wish to clean it
yourself, we recommend using a stiff plastic
or non-metallic brush. If a metal brush is
used, its size should be slightly smaller than
the flue to avoid damaging the chimney. Do
not use a brush that will scratch the stainless
steel interior of the chimney.
C. Do not expect chemical cleaners to keep
your chimney clean. The rain cap can be
removed for inspection and/or cleaning of
the chimney.
Top Baffle Removal Prior to Cleaning The
Chimney
Before starting to clean your chimney, we
recommend that you remove the top baffle to
avoid creosote dust collection at the top of the
baffle. Follow these steps to set the top baffle
out of the way:
1. Remove the side refractory holder. They are
located at the top of the refractory.
2. Lift the front baffle.
3. Slide the back baffle under the front baffle.
You now have access to the chimney.
Figure 2a - Top Baffle Removal
Figure 2b - Top Baffle Removal
Dealing With a Chimney Fire
Regular chimney maintenance and inspection
can prevent chimney fires. If you have a chimney
fire, follow these steps:
1. Close the fireplace door and the combustion
air controls.
2. Alert your family of the possible danger.
3. If you require assistance, alert your fire
department.
4. If possible, use a dry chemical fire extin
guisher, baking soda or sand to control the
fire. Do not use water as it may cause a
dangerous steam explosion.
5. Check outside to ensure that sparks and hot
embers coming out of the chimney are not
igniting the roof.
6. Do not use the fireplace again until your
chimney and fireplace have been inspected
by a qualified chimney sweep or a Fire
Department Inspector.
Finish Door Casing Care
Use a glass cleaner and a soft cloth to polish
the casing. Do not use abrasives such as steel
wool, steel pads or an abrasive polish for they
may scratch the casing’s finish.
DISPOSING OF ASHES
Remove ashes only when the fire is out and
the ashes are cold (24 to 48 hours after the
fire is out).
WARNING
Disposal of Ashes: Ashes should
be placed in a metal container with
a tight fitting lid. The closed container of ashes should be placed
on a non-combustible floor or on
the ground well away from all
combustible materials, pending
final disposal. If the ashes are
disposed of by burial in soil or
otherwise locally dispersed, they
should be retained in the closed
container until all cinders have
thoroughly cooled.
-
5
REFRACTORY REPLACEMENT
The intense heat of the fire will normally cause
hairline cracks in the refractory. These cracks
can be minimized by proper curing as described
in “First Fires”. They will not normally diminish the effectiveness of the refractory. If large
cracks develop, then the refractory should be
replaced. To replace the refractory bricks, follow these steps:
1. Remove the front refractories
2. Remove the bottom refractory
3. Remove the left side refractory
4. Remove the right side refractory
5. Remove the back refractory
6. Remove the front ceramic baffle
7. Remove the rear ceramic baffle
To install the new refractories, follow the above
steps in reverse.
DOOR INSTALLATION
The door must be installed only when the installation of the Brentwood™ fireplace is completed.
All you have to do is fit the male part of the
hinge, already on the door, to the female part,
which is on the fireplace.
To remove the door, simply pull the door up
from the hinges.
The door adjustment has been set at the factory.
If the fit is still not perfect, you can adjust the
door using the hinge screws.
DOOR ADJUSTMENT
The door may need to be adjusted to be completely airtight. The gaskets’ air-tightness can be
adjusted using the adjustment screw located on
the right side of the fireplace facade (An Allen
key #1/8 – not supplied - will be necessary for
this adjustment).
Checking Door Seal - A one-inch strip of paper
may be used to perform a test of the integrity
of the door seal. Close the door on the paper in
at least eight points. It is normal to feel only a
slight amount of friction. The door gasket does
not need to be “tight” in all areas, since a small
amount of leakage is not hazardous or detrimental to the performance of your fireplace.
1. Front Refractories
2. Bottom Refractory
3. Left Side Refractory
4. Right Side Refractory
5. Back Refractory
6. Front Ceramic Baffle
7. Rear Ceramic Baffle
Figure 3
3
WARNINGS
7
2
6
5
4
1
• Use only a Lennox Hearth Products glass doors, specifically designed
for the Brentwood fireplace.
• The fireplace cannot be operated without a door. Consult your dealer
to select the correct door model.
• Important! To assure proper alignment of glass doors: Install this
fireplace in a square and plumb condition, using shims as necessary at sides and/or bottom.
Hinge Screws
Figure 4 - Door Installation
6
Gasket Adjustment Screw
Figure 5
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
GLASS CARE
Glass Replacement
The glass used for the Brentwood™ fireplace
is a high temperature ceramic glass (1,400°
F). If the glass breaks, it must be replaced
with an identical ceramic glass. Tempered
glass or ordinary glass will not withstand the
high temperatures of the Brentwood fireplace.
Replacement glass should be purchased from a
Lennox Hearth Products dealer (see “Replacement Parts”, Page 23). DO NOT OPERATE THE
UNIT WITH CRACKED OR BROKEN GLASS.
Glass Cleaning
The Brentwood fireplace is designed to keep
the glass clean under normal operating conditions. If the Brentwood fireplace is operated
continuously with the combustion air controls
closed, the glass will tend to get dirty unless
the fuel, firebox and glass are maintained at
hot temperatures (see “Refueling For Best
Performance”). To clean the glass, there are a
number of specially designed cleaners. Your
authorized Lennox Hearth Products dealer can
recommend a suitable cleaner which is available
in your area. Regular household glass cleaners
will not clean creosote. Do not use abrasives
such as steel pads, steel wool or oven cleaner
as they will scratch the glass.
DO NOT USE CHEMICAL GLASS CLEANERS
ON PAINTED SURFACES AS IT MAY CAUSE
THE PAINT TO PEEL.
CAUTION : DO NOT ALLOW WINDOW CLEANER
TO GET IN CONTACT WITH DOOR GASKET OR
PAINT ON FACADE OR DOOR. ONCE CLOSED,
CONTACT OF GLASS CLEANER WITH THE
FIREPLACE FACADE CAN PROVOKE PAINT
PEELING OFF.
Gasket Replacement
Remove the door from the unit (see Page 6)
and lay it on a clean unabrasive surface. To
replace the gasket, first remove all of the old
gasket and gasket cement. Make sure that the
surface is totally clean before applying new
cement (a high temperature silicone caulking
rated at 500° F [260° C] is suitable) or adhesion
problems may result. Apply gasket cement to
the gasket channel and install the new gasket.
This replacement part is available from your
Lennox Hearth Products dealer in the following
dimensions:
Gasket Length Dimensions Part No.
69
Around
Glass
On Door
Frame
(1753)
(1854)
5/16” dia.
(8)
73
5/8 dia.
(15.9)
SR1823H
SR1823G
Table 1 Inches (millimeters)
FIREPLACE INSTALLATION
Locating The Brentwood Fireplace
A. The best location to install your fireplace is
determined by considering the location of
windows, doors, and the traffic flow in the
room where the fireplace is located, allowing space in front of the unit for the hearth
extension and the mantel, and taking into
consideration the location of the hot air ducts
(optional), outside air kit and chimney.
If possible, you should choose a location
where the chimney will pass through the
house without cutting floor or roof joists
(see fireplace dimensions Page 9).
B. Usually, no additional floor support is
needed for the fireplace. The adequacy of
the floor can be checked by first estimating
the weight of the fireplace system. Weights
are given in the appendix. Next, measure
the area occupied by the fireplace which is
normally 36” x 24-1/2” (914mm x 622mm).
Note the floor construction and consult your
local building code to determine if additional
support is needed.
C. The Brentwood fireplace may be installed
directly on the floor or on a raised base (for
proper guidelines, refer to “Hearth Extension
Requirements”) and a minimum of 6’8” (2
m) measured from the base of the appliance
to the ceiling is required.
When selecting the location, the chimney outlet
position and the direction of the wind are important factor affecting the chimney performance.
To allow a maximum draft and to reduce wind
turbulence, the chimney must:
• Penetrate the highest part of the roof.
• Be installed as far as possible of roof offsets,
trees or any other obstructions that may
cause wind turbulence and back drafts in
the chimney.
• The least amount of offsets (elbows) pos
sible.
-
Outside Air Intake
Facing the Wind
Figure 6
Location Recommended
Marginal Location
Wind Direction
Location
Not
Recommended
Location
Not
Recommended
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
7
Framing, Facing And Mantel
The construction of the framing, facing, and
mantel must be in accordance with the standards and the following illustrations (Figures
7a, 7b and 8):
A. Frame the fireplace using 2” x 3” or heavier
lumber.
B. WARNING: Combustible materials
cannot be used in the space directly
above the fireplace, except for the
studs above the facade that support
the facing and mantel. This area must
remain empty for a height of 6’8”
(2,032 mm) measured from the base
of the appliance.
C. Frame the fireplace with vertical studs at the
sides of the fireplace running from floor to
ceiling (see Figure 8). If combustible facing
is to be used, position the studs back, from
the front edge of the fireplace (a space that
is the thickness of the facing material, so
that the facing can be installed flush with the
fireplace facing). Frame headers between
the vertical studs only as follows:
- Place 2” x 3” or 2” x 4” headers,
only along the upper part of the front,
side and back faces (some codes
may require a 2” x 6 ” on an outside
bearing wall). Do not put wood or any
combustible material within the area
above the fireplace except on the front
facing.
- Place headers only as required to support
the facing and mantel.
D. WARNING: The fireplace must not be
in contact with any insulation or loose
filling material. Cover the insulation with Drywall panels around the
fireplace.
Fireplace
The crack between the fireplace
and the hearth extension must be
sealed with a non-combustible
material such as sand-cement
grout.
Floor
Elevated Fireplaces
u Elevated fireplace installations
require a special “Z” Metal
Safety Strips (field provided),
in place of the safety metal strip
shown above. The safety strip
should extend the full width of
the fireplace. When more than
one safety strip is used they must
overlap by a minimum of 1”.
Figure 7A - Hearth Extension Requirements
WARNING: THE HEARTH EXTENSION IS TO BE INSTALLED ONLY
AS ILLUSTRATED.
Safety Metal Strip
Hearth Extension
Non-Combustible
Finish Material
1/2”
13mm
Fireplace
Platform
2”
u
Hearth Extension Requirements
The Brentwood fireplace may be installed
directly on a combustible floor. The supplied
safety metal strip must be positioned as follows: One half under the front of the fireplace
and the other half must extend on the floor
over which the hearth extension will be built
(see Figure 7a).
* The safety metal strip must cover the entire
width of the fireplace
The combustible floor in front of the fireplace
must be covered with a non-combustible
material (tile, marble, stone, etc). See Figures
7a and 7b.
COLD CLIMATE INSTALLATIONS
Climates where temperatures will fall below
32° F (0° C).
The heating performance of the appliance will
vary depending upon the level of insulation,
house design, how the appliance is operated,
etc.
If this fireplace is being installed in a cold
climate, it is especially important to seal all
cracks around the fireplace and wherever cold
air could enter the room with noncombustible
material.
8
4”
36”
(914mm)
Area where wood
Mantel can be
installed
45 Deg.
17” Min.
(432mm)
45”
(1143mm)
Min.
(457mm)
Mantel
18”
Hearth
Extension
(102mm)
Non-Combustible Material
Figure 7b - Hearth Extension Requirements
Also, the outside air inlet duct should be wrapped with noncombustible insulation to minimize
the formation of condensation. Do not place insulation materials directly against the chimney
sections. We recommend that you use the insulated wall radiation shield since it will maintain
the home’s thermal barrier. AC chimney is NOT recommended in very cold climates (in areas with
temperatures below 0° F (-18° C).
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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