Comfortflame B42LI-M Safety guide

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SAVE THIS BOOK
This book is valuable. In addition to instructing you
on how to install and maintain your appliance, it also
contains information that will enable you to obtain re-
placement parts or accessory items when needed. Keep
it with your other important papers.
This replace is approved for use as a wood burning
replace or for use with a vented gas log approved to
ANS Z21.60, Z21.84 standard or for use with a vent-free
gas log heater approved toANS Z21.11.2 standard. AFMI
PRODUCTS, LLC hood must be installed when using a
vent-free log heater (see Accessories, page 18).
This wood burning replace complies with UL127-
CAN/ULS-S610-M87 standard as a FACTORY BUILT
APPLIANCE.
FOR CANADA: The authority having jurisdiction (such
as the municipal building department, re department,
etc.) should be contacted before installation to deter-
mine the need to obtain a permit.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
WOOD BURNING FIREPLACE
OWNER’S OPERATION AND INSTALLATION MANUAL
MODEL B42LI-M
ICC-ES #ESR-2542
Flame
Flame
TM
Comfort
Comfort
by FMI PRODUCTS, LLC
P F S
®
USC

www.fmiproducts.com 115386-01D2
SAFETY
WARNING: Do not install a
replace insert in this box unless
the manufacturer's instructions
with the insert specically state
this replace has been tested for
use with this insert.
FOR YOUR SAFETY
• Do not store or use gasoline
or any other ammable vapors
or liquids in the vicinity of this
or any other appliance.
• Due to high temperatures, the
appliance should be located
out of trafc and away from
furniture and draperies.
• Do not place clothing or other
ammable materials on or near
the appliance.
• Never leave children unat-
tended when a re is burning
in the replace.
WARNING: Use solid wood
or processed solid fuel re logs
only. When processed wood
fuel re logs are used, do not
poke or stir the logs while they
are burning. Use only re logs
that have been evaluated for
the application in replace and
refer to re log warnings and
caution markings on packaging
prior to use.
This replace is not intended to
be used as a substitute for a fur-
nace to heat an entire home. Use
for supplemental heat only.
WARNING: Improper instal-
lation, adjustment, alteration,
service or maintenance can
cause injury,propertydamageor
loss of life. Refer to this manual
for assistance or additional in-
formation. Consult a qualied
installer or local distributor.
IMPORTANT: Check local codes
before installing this replace.
Before beginning installation of this replace,
read these instructions through completely.
• This FMI PRODUCTS, LLC replace and
its components are safe when installed
according to this installation manual.
Unless you use FMI PRODUCTS, LLC
components, which have been designed
and tested for the replace system, you
may cause a re hazard.
• The FMI PRODUCTS, LLC warranty will
be voided by and FMI PRODUCTS, LLC
disclaims any responsibility for the following
actions.
a. Modification of the fireplace, com-
ponents, doors, air inlet system and
damper control.
b. Use of any component part not manufac-
tured or approved by FMI PRODUCTS,
LLC in combination with a FMI PROD-
UCTS, LLC replace system.
Proper installation is the most important step
in ensuring safe and continuous operation of
replace. Consult the local building codes as
to the particular requirements concerned with
the installation of all factory built replaces.
TABLE OF CONTENTS
Safety .................................................................. 2
Specications ...................................................... 3
Fireplace Installation............................................ 4
Venting Installation .............................................. 7
Optional Gas Line Installation............................ 13
Operation and Maintenance .............................. 14
Technical Service............................................... 15
Parts .................................................................. 16
Replacement Parts ............................................ 18
Accessories ....................................................... 18

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115386-01D 3
SPECIFICATIONS
0" TO
BOTTOM
OUTSIDE AIR
(LEFT SIDE
ONLY)
TOP SPACERS
3/4" AIR
SPACE
BACK
AND
SIDES
HEARTH
EXTENSION
66" X 20"
12"
EACH SIDE
1" AIRSPACE
TO COMBUSTIBLE
COMBUSTIBLE
WALL BOARD
0" TO
MATERIAL
NO COMBUSTIBLE
MATERIAL ON FACE
GAS LINE
KNOCK OUT
AIR KIT KNOCK OUTS
ROUND TOP TERMINATION
GAS LINE
KNOCK OUTS
LEFT SIDE
RIGHT SIDE
NOT LESS
THAN 14" TO
PERPENDICULAR
SIDEWALL
SQUARE CHASE-TOP
TERMINATION
8.25"
10.375"
13"
37.5"
33"
44"
42"
21.5"
32"
6.5"
38.85"
14.438"
1.375"
25.375"
7"
7"
1"
8.25"
14"
44"
1"
1.75"
0.625"
28.5"
21.125"

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FIREPLACE INSTALLATION
SELECTING LOCATION
To determine safest and most efcient location
for replace, you must take into consideration
the following guidelines:
1. Location must allow for proper clearances
(see Figures 1 and 2).
2. Consider a location where replace will
not be affected by drafts, air conditioning
ducts, windows or doors.
3. A location that avoids cutting of joists or
roof rafters will make installation easier.
4. An outside air kit is available with this
replace (see Optional Outside Air Kit on
page 7).
MINIMUM CLEARANCE TO
COMBUSTIBLES
Back and sides of replace 3/4" minimum*
Floor** 0" minimum
Perpendicular wall to opening 14" minimum
Top spacers 0" minimum
Mantel clearances see Mantels, page 6
Chimney outer pipe surface 1" minimum
* Not required at nailing anges
** See step 2 of Framing
WARNING: Do not pack re-
quired air spaces with insulation
or other materials.
Minimum/Maximum Chimney Height
Minimum height of chimney, measured from
base of replace to ue gas outlet of termina-
tion, is 11.5 feet for straight ue or a ue with
one elbow set. Maximum distance between
elbows is 2 feet. For systems with two elbow
sets, minimum height is 22 feet. Maximum
height of any system is 50 feet. This measure-
ment includes replace, chimney sections and
height of termination assembly at level of ue
gas outlet (see Figure 18, page 11).
FRAMING
1. Frame opening for replace using dimen-
sions shown in Figures 1 and 2.
2. If replace is to be installed directly on
carpeting, tile (other than ceramic) or any
combustible material other than wood
ooring, replace must be installed upon
a metal or wood panel extending full width
and depth of replace.
3. Set replace directly in front of this open-
ing and slide unit back until nailing anges
touch side framing.
4. Check level of replace and shim with
sheet metal if necessary.
5. Before securing fireplace to prepared
framing, ember protector must be placed
between hearth extension (not included)
and under bottom front edge of replace
to protect against glowing embers falling
through. If replace is to be installed on
a raised platform, a Z-type ember protec-
tor (not included) must be fabricated to
t your required platform height. Ember
protector should extend under replace a
minimum of 1 1/2". Ember protector should
be made of galvanized sheet metal (28
gauge minimum) to prevent corrosion.
6. Using screws or nails, secure replace to
framing through anges located on sides
of replace.
22"
37.625"
44.25"
Figure 1 - Framing Dimensions
52 1/2"
15 7/8"
22 1/2"
72 7/8"
Maintain 3/4"
Clearance at
Sides and
Back of
Fireplace
3/4" Clearance Not
Required at Nailing Flanges
Figure 2 - Corner Installation

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115386-01D 5
HEARTH EXTENSION
A hearth extension projecting a minimum of
20" in front of and a minimum of 12" beyond
each side of replace opening is required to
protect combustible oor construction in front
of replace. Fabricate a hearth extension
using a material which meets the following
specications: a layer of noncombustible,
inorganic material having a thermal conductiv-
ity of K=0.84 BTU IN/FT, HR. F (or less) at 1"
thick. For example, if material selected has
a K factor of 0.25, such as glass ber, the
following formula would apply:
0.25 x 1.0" = 0.30" thickness required
0.84
Thermal conductivity "K" of materials can be
obtained from manufacturer or supplier of
noncombustible material. If hearth extension
is to be covered, use noncombustible mate-
rial such as tile, slate, brick, concrete, metal,
glass, marble, stone, etc. Provide a means
to prevent hearth extension from shifting and
seal gap between replace frame and hearth
extension with a noncombustible material
(see Figure 3).
WARNING: Hearth extension
is to be installed only as shown
in Figure 3.
FIREPLACE INSTALLATION
Continued
Figure 3 - Hearth Extension
Seal Gap
Fireplace Front
Ember Protector
Fireplace Front
Raised Hearth
Fireplace Front
Elevated
Ember Protector
Ember Protector
Seal Gap
Hearth
Extension
Seal Gap
Fireplace Front
Ember Protector
Fireplace Front
Elevated
Do Not Block Louver
Ember Protector
Seal Gap
Hearth
Extension
Hearth Extension, Circulating Modes
Hearth Extension, Noncirculating Models
NO

www.fmiproducts.com 115386-01D6
FIREPLACE INSTALLATION
Continued
Figure 4 - Mantel Clearances to
Combustible Material
Electrical
Bushing
Electrical
Cover
Plate
Rocker
Switch
Figure 6 - Fan Switch-Electrical Bushing
Electrical
Housing
Wire Nut (3x)
(Not Supplied)
Outer Wrapper
of Fireplace
Electrical Cover
Plate and
Electrical Bushing
Fireplace Chassis
Ground
To Power
Source
Receptacle
(Supplied)
Power Source Wiring
(Not Supplied)
Prewired Receptacle
and Ground
MANTELS
A mantel may be installed if desired (see
Figure 4). Woodwork such as wood trims,
mantels or any other combustible material
projecting from front face must not be placed
within 12" of replace opening (and within 9"
of top louver opening). Combustible materi-
als above 12" and projecting more than 1 1/2"
from replace must not be placed less than
12" from top opening of replace (NFPA STD
211, Sec. 7-3.3.3).
Mantels or any other combustible material
may come up to side edge of black metal face
of replace if projection from front face falls
within limits shown in Figure 5.
FAN/BLOWER KIT ASSEMBLY
Fan or blower kit is optional with this replace
(for circulating models only). Use of blowers
or fans other than those manufactured by
FMI PRODUCTS, LLC voids warranty. Fan
is operated by pressing rocker switch (see
Figure 6) in lower right hand corner of replace
face. Blower is operated by turning control
knob (not shown).
Fan/blower kit electrical connections are
made through electrical cover plate on side
of replace a shown in Figure 6.
FIREBOX
SAFE ZONE
Figure 5 - Side Mantel Clearance
Top View of Fireplace
Min. 12" from
Perpendicular Side Wall
1"
0.625" Max.
33°
8"
Wiring Instructions
1. Remove electrical cover plate with bush-
ing from replace by removing 2 sheet
metal screws as shown in Figure 6.
2. Slide power source wiring through electri-
cal bushing opening and electrical cover
plate and make all necessary connec-
tions.
3. Slide all wiring connections in electrical
housing as shown in Figure 6.
4. Secure electrical cover plate with screws
previously removed.
Note: Electrical housing and cover plate have
sharp edges. Wear protective gloves.
Sheet
Metal
Screws
12 1/4" Ref.
1 1/2"
Max.
Upper Section
of Circulating
Fireplace
6"
Ref.
9"
Min.
33°
3" Nom. *Note: Drawing
Not To Scale
Safe Zone For
Projection of
Combustible
Materials
Combustible
Material
15"
Min.
12"
Min.
Fireplace Opening
To p of
Louvered
Opening

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115386-01D 7
Figure 8 - Lineal Gain
LINEAL GAIN
PART NO. DESCRIPTION GAIN
42" Fireplace 37 1/2"
12-8DM
12-8HT Pipe Section 10 5/8"
18-8DM
18-8HT Pipe Section 16 5/8"
24-8DM
24-8HT Pipe Section 23 5/8"
36-8DM
36-8HT Pipe Section 34 5/8"
48-8DM
48-8HT Pipe Section 46 5/8"
RT-8DM Round Termination 6 7/8"*
RTL-8DM Round Termination 7 3/4"*
RTT-8DM Round Termination
with Slip Section
6 7/8" to
23 1/8"*
RTTL-8DM Round Termination
with Slip Section
8 1/2" to
21 1/2"*
ET-8DM Square Chase-Top 12"*
ETO-8DM Square Chase-Top
with Mesh 12"*
ETL-8DM Square Chase-Top
with Slip Section 7" to 15"*
ETLO-8DM
Square Chase-Top
with Mesh & Slip
Section
12" to
25 1/2"*
* The lineal gain for the terminations is
measured to the ue gas outlet height.
Hemmed
End
8" Stainless
Inner Pipe
12 3/8"
Galvanized
Outer Pipe
Figure 7 - Outside Air Kit
Secure to Collars with Metal Tape, Screws
or Straps (Min. of 1/4" x 20" in size)
Air Inlet
Location
Must Allow
For Bushes
or Snow
Vent Hood
Required for
Wall Installation
Air Inlet
Eyebrow
Vented Crawl Space
(Check Local Codes
Before Installing in a
Vented Crawl Space)
VENTING INSTALLATION
OPTIONAL OUTSIDE AIR KIT
(MODEL AK4/AK4F)
Installation of outside air kit should be per-
formed during rough framing of replace due
to the nature of it's location. Outside combus-
tion air is accessed through a vented crawl
space (AK4F) or through a sidewall (AK4).
See Figure 24 on page 15 for instruction of
operating air kit.
CAUTION: Combustion air
inlet ducts shall not terminate
in attic space.
The maximum height for the
air vent can not exceed 3 feet
below the ue gas outlet of the
termination.
CHIMNEY PIPE
FMI PRODUCTS, LLC chimney system
consists of 12", 18", 24", 36" and 48" snap-
lock, double-wall pipe segments, planned
for maximum adaptability to individual site
requirements. Actual lengths gained after t-
ting overlaps must be taken into consideration
(lineal gain) and are given in lineal gain chart
(see Figure 8).
Lineal gain is actual measurable length of a
part after two or more parts are connected.
WARNING: The opening in
collar around chimney at top of
replace must not be obstructed.
Never use blown insulation to ll
chimney enclosure.

www.fmiproducts.com 115386-01D8
VENTING INSTALLATION
Continued
Figure 9 - Typical Offset Installation
Return
Elbow
Offset
Elbow
Return
Elbow Offset
Elbow
6' Max.
6' Max.
6' Max.
6' Max.
6' Max.
6' Max.
Return
Elbow
Offset
Elbow
Offset
Elbow
Return
Elbow
A B C
Offset
Elbow
Ceiling
Support Pipe
12S-8DM
Return
Elbow
ASSEMBLY AND INSTALLATION OF
DOUBLE WALL CHIMNEY SYSTEM
Each double wall chimney section consists
of a galvanized outer pipe, a stainless steel
inner ue pipe and a wire spacer. Pipe sec-
tions must be assembled independently as
chimney is installed. When connecting chim-
ney directly to replace, inner ue pipe sec-
tion must be installed rst with lanced side
up. Outer pipe section can then be installed
over ue pipe section with hemmed end up.
Press down on each pipe section until lances
securely engage hem on replace starter.
Wire will assure proper spacing between
inner and outer pipe sections.
Note: For Canada, use chimney parts des-
ignated HT.
Opening in collar around
chimney at top of replace must
not be obstructed. Never use
blown insulation to ll chimney
enclosure.
Continue to assemble chimney sections as
outlined, making sure that both inner and
outer pipe sections are locked together. When
installing double wall snap-lock chimney to-
gether, it is important to assure joint between
chimney sections is locked. Check by pulling
chimney upward after locking. Chimney will
not come apart if properly locked. It is not
necessary to add screws to keep chimney to-
gether (exception - see Figure 11, page 9).
USING ELBOW OFFSETS (30E-8DM)
1. To achieve desired offset, you may install
combinations of 12", 18", 24", 36" and
48" length of double wall pipe (see offset
chart, page 7, and Figure 9).
Note: For systems with 2 elbow sets, mini-
mum height is 22 feet. Maximum height
for any system is 50 feet.
2. Chimney weight above offset rests on
return elbow. Straps must be securely
nailed to rafters or joists (see Figure 10,
details A and B, page 9).
3. Maximum length of pipe between supports
(return elbow or 12S-8DM) is 6' of angle
run. Maximum of two 6' angle run sections
per chimney system (see Figure 9).
4. All pipe connections between offset and
return must be secured with two screws
on outer pipe only (see Figure 11, page
9). Do not penetrate inner stainless.

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115386-01D 9
Figure 11 - Elbow Offset
B
A
Screws
Figure 10 - Ceiling Support Pipe 12S-8DM
OFFSET RISE CHIMNEY LENGTH
A B 48" 36" 24" 18" 12"
4 3/8"16 3/8" ELBOW SET ONLY
9 3/4"25 1/2"1
12 3/4"30 3/4"1
15" 34 3/4"1
18" 40" 1 1
21 1/4"46 1/4"1
23 3/4" 49 1/4"1 1
27 3/4"56 3/4"1
30" 60 3/4"1 1
33" 66" 1 1
36" 71" 1 1
38 1/4" 75" 2
41 1/4"80 1/4"1 1 1
45" 86 3/4"2
46 3/4" 89 1/2"1 1 1
51" 97" 1 1
53 1/4" 101" 2 1
56 1/4"106 1/4"2
59 1/4"111 1/2"1 1 1
61 3/4"115 1/2"2 1
64 3/4"120 3/4"2 1
68 1/4" 127" 1 2
70" 130" 2 1 1
74 1/4"137 1/2"1 2 1
76 3/4"141 1/2"1 2 1
79 3/4"146 3/4"4
OFFSET CHART (22-50 FT. SYSTEM HEIGHT)
2" Min.
Straps Straps
Straps
Straps
Detail A
Return Elbow
Detail B
Angle
Firestop
See Detail A
See Detail B
Ceiling Support
Pipe 12S-8DM
VENTING INSTALLATION
Continued

www.fmiproducts.com 115386-01D10
VENTING INSTALLATION
Continued
Pitch Slope Opening
"A" Max.
Used Flashing
Model No.
Flat 0° 15" V6F-8DM
0-6/12 26.6° 16 1/8" V6F-8DM
6/12- 12/12 45.0° 20 3/8" V12F-8DM
4. Remove shingles around opening mea-
sured. Cut out this section.
5. Add next sections of pipe until end
penetrates roof line. Check to see that
proper clearances are maintained. Extend
chimney by adding sections of double wall
pipe until pipe is minimum of 30" above
highest point of roof cutout. Termination
and chimney must extend a minimum of
36" above highest point where it passes
through roof.
Figure 14 - Roof Opening Measurements
FLASHING INSTALLATION (V6F-8DM
OR V12F-8DM)
Determine ashing to be used with roof open-
ing chart. Slide ashing over pipe until base is
at against roof. Replace as many shingles as
needed to cover exposed area and ashing
base. Secure in position by nailing through
shingles (see Figure 15, page 11). DO NOT
NAIL THROUGH FLASHING CONE.
Installing Flashing on a Metal Roof
When installing ashing on a metal roof, it
is required that putty tape be used between
ashing and roof. Flashing must be secured
to roof using #8 x 3/4" screws and then sealed
with roof coating to prevent leakage through
screw holes. A roof coating must also be ap-
plied around perimeter of ashing to provide
a proper seal.
FIRESTOP SPACERS (FS-8DM)
Firestop spacers are required at each point
where chimney penetrates a floor space.
Their purpose is to establish and maintain
required clearance between chimney and
combustible materials. When pipe passes
through a framed opening into a living space
above, restop must be placed onto ceiling
from below as shown in Figure 12.
They also provide complete separation from
one oor space to another or attic space as
required by most codes. When double wall
pipe passes through a framed opening into
an attic space, restop must be placed into
an attic oor as shown in Figure 13.
Figure 12 - Firestop Spacer with Living
Space Above Ceiling
Figure 13 - Firestop Spacer with Attic
Space Above Ceiling
PENETRATING ROOF
To maintain a 2" clearance to pipe on a roof with
a pitch, a rectangular opening must be cut.
1. Determine center point where pipe will
penetrate the roof.
2. Determine center point of the roof. Pitch
is the distance the roof drops over a given
span, usually 12". A 6/12 pitch means that
the roof drops 6" for each 12" measure
horizontally down from roof rafters.
3. Use roof opening chart (Figure 14) to
determine correct opening length and
ashing required.
If area above is a living space, install
restop below framed hole.
If area above is an attic or insulated area,
install restop above framed hole.
30"
(76.2 cm)
Minimum Measurements
Opening "A"
16
3
/
8
"
(48.3 cm)
2"
(5.1
cm)
2"
(5.1
cm)
2"
(5.1 cm)

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115386-01D 11
Nail Only
Outer
Perimeter
of Flashing
Storm Collar
Underlap Shingles
at Bottom
Overlap
Shingles Top
and Sides Only
Figure 15 - Flashing Installation
Figure 16 - Storm Collar
Chimney
Pipe
Waterproof
Caulk
Storm
Collar Flashing
Storm Collar Installation (SC1 or SC2)
Place storm collar over pipe and slide down
until it is snug against open edge of ashing
(see Figure 16). Use SC1 for all round ter-
minations and SC2 for all terminations with
slip sections. Apply waterproof caulk around
perimeter of collar to provide a proper seal.
Terminations/Spark Arrestor
Fireplace system must be terminated with
listed round top or chase terminations. In any
case, refer to installation instructions supplied
with termination. Terminations approved for
this replace are RT-8DM and RTL-8DM that
can be used for ashing or chase and ET-
8DM, ETO-8DM, ETL-8DM and ETLO-8DM
for chase style termination only. Figure 17
shows an RTL-8DM round top termination.
CAUTION: Do not seal open-
ings on the rooftop ashing. Fol-
low the installation instructions
provided with the termination
being used.
Flashing
Cone
VENTING INSTALLATION
Continued
Attach Bracket
Tabs to
Outer Pipe
(3 Places)
Secure with
Screws
RTL-8DM Level of Flue
Gas Outlet
Caulk
Collar
Flashing
Underlap Shingles
Bottom Only
Figure 17 - Termination
Overlap
Shingles Top
and Sides
Terminations with 16" slip pipe sections are
available. RTT-8DM and RTTL-8DM are
approved for flashing installations. When
needed, these adjustable terminations may
be used in combination with pipe assembly
to achieve correct chimney height.
Note: In the rare instance there is a problem
with side driven rain or wind or chimney is
not drafting properly, an ADS-8DM (Anti-Draft
Shield) can be used with round terminations.
Flue Pipe of
RTL-8DM
Inside Inner
Pipe of
Chimney
CHASE INSTALLATIONS
Instructions for chase installations are includ-
ed with chase style termination chosen. In a
multiple chase installation, be sure to provide
adequate distance between terminations to
prevent smoke spillage from one termination
to another. We suggest that terminations be
separated at least 24", center to center and
stacked at a vertical height difference of 18"
(see Figure 18).
Note: If a decorative shroud is to be installed,
contact manufacturer for specications.
18" MIN. TYP.
24" MIN. 24" MIN.
Figure 18 - Multiple Chase Installation

www.fmiproducts.com 115386-01D12
10'
2' Min.
10'
3' Min.
2' Min. 3' Min.
Level of
Flue Gas
Outlet
Figure 19 - 10 Foot Rule
10 FOOT RULE
All ue gas outlet chimney terminations must
extend a minimum of 3 feet in height above
highest point where it passes through roof and
must be at least 2 feet above highest point of
the roof that is within a horizontal distance of
10 feet (see Figure 19).
VENTING INSTALLATION
Continued
FINISHING FIREPLACE
Combustible materials, such as wallboard,
gypsum board, sheet rock, drywall, plywood,
etc., may make direct contact with sides and
top around replace face. It is important that
combustible materials do not overlap face
itself. Brick, glass, tile or other noncombustible
materials may overlap front face provided
they do not obstruct essential openings such
as louvered slots. When overlapping with
a noncombustible facing material, use only
noncombustible mortar or adhesive.
30E-8DM
EFFECTIVE HEIGHT
OF TERMINATION CAP
EFFECTIVE HEIGHT
OF TERMINATION CAP
EFFECTIVE HEIGHT
OF TERMINATION CAP
EFFECTIVE HEIGHT
OF TERMINATION CAP
MINIMUM
HEIGHT
14.5 FT.
MINIMUM
UP TO
6FT. MAX.
UP TO
6FT. MAX.
HEIGHT
14.5 FT.
MIN. HEIGHT
OF 22 FT. (WITH
2 ELBOW SETS)
MAX. HEIGHT OF
50 FT.
MAX. HEIGHT
50 FT.
(ANY SYSTEM)
30E-8DM
Figure 20 - Typical Residential Installations

www.fmiproducts.com
115386-01D 13
OPTIONAL GAS LINE INSTALLATION
Figure 21 - Gas Line Knockout
Side
Firebrick
Finished
Side
Refractory
Knockout
Plug
Outside of
Fireplace
Gas Line
Conduit
Insulation
Gas
Conduit
Cover
1/2" Dowel
Gas line hook up should be done by your
supplier or a qualied service person.
Note: Before you proceed, make sure your
gas supply is turned off.
Use only a 1/2" black iron pipe and appropri-
ate ttings.
1. Remove knockout indentation on refracto-
ry or rebrick wall located above refractory
hearth oor. Knockout indentation must
be rmly tapped with any solid object,
such as a 1/2" dowel, until it is released.
Remove fragmented portions of refractory
(see Figure 21).
2. Remove gas line cover plate located on
either side of replace and pull out insu-
lation from gas line conduit sleeve. Save
insulation for reuse.
3. Run a 1/2" black iron gas line into re-
place through rear at gas line conduit
sleeve (if using a raised platform, add
height). Provide sufcient gas line into
replace chamber for tting connection
(see Figure 22).
Note: Secure incoming gas line to wood
framing to provide rigidity for threaded
end.
4. Repack insulation around gas line and into
sleeve opening. Seal any gaps between
gas line and refractory knockout hole with
refractory cement or commercial furnace
cement. Install gas appliance or cap off
gas line if desired.
CAUTION:All gas piping and
connections must be tested for
leaks after installation is com-
pleted. After ensuring that gas
valve is on, apply soap and water
solution to all connections and
joints. Bubbles forming show a
leak. Correct all leaks at once.
DO NOT USE AN OPEN FLAME
FOR LEAK TESTING AND DO
NOT OPERATE ANY APPLIANCE
IF A LEAK IS DETECTED. LEAK
TESTING SHOULD BE DONE
BY A QUALIFIED SERVICE
PERSON.
Note: A FMI PRODUCTS, LLC hood must be
installed when using an unvented gas log set
(see Accessories on page 18).
WARNING: Do not operate an
unvented gas log set in this re-
place with chimney removed.
If you install a decorative gas appliance (vent-
ed gas log), decorative gas appliance must
comply with the Standard for Decorative Gas
Appliance for Installation in Solid Fuel Burning
Fireplaces, ANS Z21.60, Z21.84 or RG 2-72
and shall also be installed in accordance with
the National Fuel Gas Code, ANSI 7223NFPA
54 latest edition.
WARNING: To avoid the risk
of damaging replace materials
and increasing the risk of spread-
ing a re, do not use replace to
cook or warm food.
Seal
Opening
with
Refractory
Cement
Outside of
Fireplace
Gas
Line
Conduit
Repack
Insulation
Incoming
1/2" Black
Iron Pipe
Side
Firebrick
Finished
Side
Provide Enough Threaded
End for Fitting Connection
Figure 22 - Gas Line Installation

www.fmiproducts.com 115386-01D14
OPTIONAL GAS LINE INSTALLATION
Continued
WARNING: If the replace
has been used for wood burn-
ing, rebox and chimney must
be cleaned of soot, creosote and
ashes be a qualied chimney
cleaner. Creosote will ignite if
heavily heated.
OPERATION AND MAINTENANCE
Figure 23 - Glass Doors
Cleaning Glass
Clean glass with any commercial glass
cleaner or soap and water. Do not use any
abrasive material to clean the glass. Do not
clean glass with any cool water if glass is still
hot from re and smoke.
A gas line or gas log lighter may be installed
for the purpose of installing a vented or vent-
free decorative gas appliance incorporating an
automatic shutoff device and complying with
the Standard for Decorative Gas Appliances
for Installation in Vented Fireplaces, ANSI
Z21.60 or American Gas Association draft
requirements for Gas Fired Log Lighters for
Wood Burning Fireplaces, Draft NO. 4 dated
August, 1993.
If you wish to install an unvented (vent-free)
gas log set, only unvented gas log sets which
have been found to comply with the standard
for unvented room heaters, ANSI Z21.11.2 are
to be installed in this replace.
WARNING: When using
a decorative vented gas log,
damper must be removed or
permanently locked in fully open
position and glass doors must
be in fully open position.
GLASS DOORS
Glass doors are optional with this replace.
When replace is in operation, doors must be
fully opened or fully closed position only or a
re hazard may be created (see Figure 23).
A replace equipped with glass doors oper-
ates much differently than a replace with an
open front. A replace with glass doors has a
limited amount of air for combustion. Exces-
sive heat within replace can result if too large
a re is built or if combustion air gate is not
completely open.
The following tips should be used to assure
that both fireplace and glass door retain
their beauty and function properly. Both the
ue damper and glass doors must be fully
opened before starting a re. This will provide
sufcient combustion air and maintain safe
temperatures in rebox.
IMPORTANT: The glass must be allowed
to warm slowly and evenly. Tempered glass
will withstand a gradual temperature rise to
550° F, which is more than a normal re will
generate. Such materials as pitch/wax laden
logs, very dry mill end lumber and large
amounts of paper or cardboard boxes can
create an excessively hot re and should not
be burned in this replace. Always keep re
back from doors and never allow ames to
contact glass.
WARNING: Fireplaces
equipped with glass doors
should be operated only with
doors fully opened or doors fully
closed. Doors, if left partly open,
may draw gas and ame out of
the replace opening creating
risks of both re and smoke.
Doors Fully Closed
Doors Fully Opened
Fireplace Front
Fireplace Front

www.fmiproducts.com
115386-01D 15
Figure 24 - Damper Handle Location
OPERATION AND MAINTENANCE
Continued
DAMPER HANDLE OPERATION
Damper handle, which opens and closes
damper blade, is located inside rebox at
center towards back wall (see Figure 24).
Pushing handle back into keyway slot will
free damper blade to automatically open.
To close, push handle back into keyhole slot
then pull down and forward to lock it in place
(see Figure 25).
WARNING: Risk of re! Re-
placegrate withFMIPRODUCTS,
LLC model 109910-01 only. This
grate has been designed to keep
the operation of your replace
safe and efcient.
For further operating guidelines, instruc-
tions and warranty information, please re-
fer to your homeowner's guide or contact
your authorized dealer.
Damper
Handle
12
3
12
3
Damper
Weight
To Close Damper To Open Damper
Figure 25 - Damper Rod
TECHNICAL SERVICE
You may have further questions about
installation, operation, or troubleshooting.
If so, contact FMI PRODUCTS, LLC at
1-866-328-4537. When calling please have
your model and serial numbers of your
heater ready.
You can also visit FMI PRODUCTS, LLC’s
web site at www.fmiproducts.com.

www.fmiproducts.com 115386-01D16
PARTS
WOOD BURNING FIREPLACE MODEL B42LI-M
11
27
30 23
22
24
10
14
25
4
17
3
2
1
5
20
28
12
7
15
9
16
13
8
26
6
29
19
18
21

www.fmiproducts.com
115386-01D 17
PARTS
WOOD BURNING FIREPLACE MODEL B42LI-M
This list contains replaceable parts used in your replace. When ordering parts, see Replace-
ment Parts on page 18 of this manual.
KEY
NO. PART NO. DESCRIPTION QTY.
1** Insulation Pan 1
2** Air Separator 1
3** Firebox Top 1
4 108302-01 Air Deector 1
5** Wrapper Top 1
6** Firebox Wrapper 1
7 108304-01 Outer Wrapper/Insulation Assembly 1
8** Firebox Floor 1
9 ** Wrapper Bottom 1
10 108298-02 Front Face Weldment 1
11
see page 18 Left Side Brick Liner 1
12
see page 18 Rear Brick Liner 1
13
see page 18 Right Side Brick Liner 1
14
see page 18 Bottom Brick Liner 1
15
see page 18 Front Bottom Brick Liner 1
16 21198 Blower Access Plate 1
17 20027 Refractory Retainer 2
18 109870-01 Circulation Plate 1
19 21366 Insulation Retainer 1
20 20280 Top Standoff 4
21 20023 Chimney Starter Collar 1
22 20088 Door Stop 1
23 11418 Push On Nut 2
24 20090 Spring Clip 2
25 107001-02 Wood Burning Grate 1
26 106539-02 Grate Retainers 2
27 108424-01 Screen 2
28 ** Side Damper Weldment 1
29 107128-01 Gas Conduit 4
30 108780-01 Screen Rod 2
PARTS AVAILABLE - NOT SHOWN
110037-01 Electrical Duct Assembly 1
** Not a eld replaceable part

www.fmiproducts.com 115386-01D18
ROOF FLASHING
0 TO 6/12 PITCH - V6F-8DM
6/12 TO 12/12 PITCH - V12F-8DM
ACCESSORIES
DOUBLE WALL PIPE
12-8DM 12-8HT
18-8DM 18-8-HT
24-8DM 24-8HT
36-8DM 36-8HT
48-8DM 48-8HT
ANTI-DRAFT SHIELD
(Round Top Termination Only)
ADS-8DM
30° OFFSET AND RETURN
30E-8DM
ADJUSTABLE HOOD
Antique Brass Finish - GA6053
Black Painted Finish - GA6050
Required when installing a vent-free gas log
in this replace.
STORM COLLAR
SC1-1 For RT-8DM and RTL-8DM
SC2-1 For RTT-8DM and RTTL-8DM
BI-FOLD GLASS DOOR
BDB42 - Black
BDB42B - Brushed Brass
BDB42P - Platinum
REPLACEMENT PARTS
STANDARD BRICK LINER
Left - 106971-01
Right - 106970-01
Rear - 108310-01
Bottom Rear 108312-01
Bottom Front 108311-01
EMBER PROTECTOR 20093

www.fmiproducts.com
115386-01D 19
FIRESTOP SPACER
FS-8DM
FAN KIT - BK3
BLOWER KIT - BK
ROUND TOP TERMINATIONS
RT-8DM, RTL-8DM
ROUND TOP TERMINATIONS WITH
SLIP SECTION
RTT-8DM, RTTL-8DM
OUTSIDE AIR KIT FOR SIDE WALL
INSTALLATION - AK4
OUTSIDE AIR KIT FOR FLOOR
INSTALLATION
AK4F
SQUARE CHASE-TOP
TERMINATION
ET-8DM, ETO-8DM
ECONO-TOP TERMINATION WITH
SLIP SECTION
ETL-8DM, ETLO-8DM
ACCESSORIES
Continued

115386-01
Rev. D
06/10
2701 S. Harbor Blvd.
Santa Ana, CA 92704
1-866-328-4537
www.fmiproducts.com