AVERTISSEMENT : Assurez-vous de bien suivre les
instructions données dans cette notice pour réduire au
minimum le risque d’incindie ou d’explosion ou pour
éviter tout dommage matériel, toute blessure ou la mort.
WARNING: If the information in these instructions
is not followed exactly, a fire or explosion may
result, causing property damage, personal injury,
or death.
WARNING /AVERTISSEMENT/AVISO
HOT GLASS WILL
CAUSE BURNS.
DO NOT TOUCH GLASS
UNTIL COOLED
NEVER ALLOW CHILDREN
TO TOUCH GLASS.
UNE SURFACE VITRÉE CHAUDE
PEUT CAUSER DES BRÛLURES.
LAISSER REFROIDIR LA SURFACE
VITRÉE AVANT D'Y TOUCHER.
NE PERMETTEZ JAMAIS À UN ENFANT
DE TOUCHER LA SURFACE VITRÉE.
EL VIDRIO CALIENTE
CAUSARÁ QUEMADURAS.
USTED DEBE NUNCA
TOCAR EL VIDRIO CALIENTE.
LOS NIÑOS DEBEN NUNCA
TOCAR EL VIDRIO.
- Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
- WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call the fire
department.
- Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
- Ne pas entreposer ni utilizer d’essence ni d’autres vapeurs
ou liquides inflammables dans le voisinage de cet appareil
ou de tout autre appareil.
- QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ :
• Ne pas tenter d’allumer d’appareil.
• Ne touchez à aucan interrupteur. Ne pas vous servir des
téléphones se trouvant dans le bâtiment où vous trouvez.
• Appelez immédiatement votre fournisseur de gaz depuis
un voisin. Suivez les instructions du fournisseur.
• Si vous ne pouvez rejoindre le fournisseur de gaz,
appelez le service des incindies.
- L’installation et l’entretien doivent être assurés par un
installateur ou un service d’entretien qualifié ou par le
fournisseur de gaz.
P/N 850041M REV. C 04/2013
This manual is one of a set of two supporting this product.
Refer to P/N 875034M for Care and Operation Instructions.
This manual is available in French. Order P/N 506223-25.
Ce manuel est disponible en francais. Simplement en faire
la demande numéro de la pièce 506223-25.
WH Report No. 3106807
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
INSTALLATEUR : Laissez cette notice avec l’appareil.
CONSOMMATEUR : Conservez cette notice pour
consultation ultérieure.
INSTALLATION INSTRUCTIONS
B-Vent Gas Fireplaces
42" LMBV Models
MODELS
Millivolt Models
LMBV-42RMN
LMBV-42RMP
Decorative Product: Not for use as a heating appliance.
NOTICE: Fireplace is not to be operated by a thermostat.
Electronic Models
LMBV-42REN
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
TABLE OF CONTENTS
Packaging ......................................... Page 2
Introduction ...................................... Page 2
General Information .......................... Page 2
Requirements for the
Commonwealth of Massachusetts ... Page 4
Cold Climate Insulation ..................... Page 5
Location ............................................ Page 5
Vent Termination Clearances ............. Page 5
Appliance and Vent Clearances ......... Page 6
Appliance and Framing Specications .. Page 7
Fireplace Installation:
Pre-Installation Steps ..................... Page 8
Typical Installation Sequence .........Page 8
Step 1. Construct Appliance
Framing ...................... Page 8
Step 2. Route Gas Line ................. Page 8
Step 3. Position Appliance ............ Page 9
Step 4. Install Vent System and
Exterior Termination ...Page 9
Step 5. Field Wiring; Install (Optional)
Wall Switch ................Page 10
Step 6. Connect to Gas Line ......... Page 11
Step 7. Install (Optional) Outside
Air Kit ......................... Page 12
Step 8. Install Logs and
Glowing Embers ......... Page 12
Appliance Operation:
Step 9. Check Appliance
Operation ....................Page 14
Manual Limit Switch ........ Page 14
Millivolt Checkout ............ Page 14
Electronic Checkout ......... Page 14
Step 10. Adjust Burner ...................Page 15
Step 11. Attach "Safety-in-
Operation" Warnings ..... Page 16
Installation Accessories .................... Page 17
Gas Conversion Kits ...................Page 18
Please read and understand these
instructions before beginning your
installation.
PACKAGING
The assembled vented gas replace is packaged with:
1 - One log set and bag of glowing embers
is packaged in a carton located within the
rebox.
2 - One envelope containing the literature
package, which consists of the care and
operation manual, installation instructions,
warranty, 8 nailing anges; envelope is
located in the control area.
3 - One grate, located in rebox.
INTRODUCTION
The millivolt appliances are designed to operate
on either natural or propane gas. A millivolt gas
control valve with piezo ignition system provides
safe, efcient operation.
The electronic appliances are designed to
operate on either natural or propane gas. An
electronic intermittent pilot system provides
safe, efcient operation. External electrical
power is required to operate these units.
Use Only These Approved Vent Components These vented gas replaces are designed for
residential applications. They must be installed
with approved Type-B, 6" diameter double wall
vent pipe systems and a listed vent termination
routed to the outside atmosphere.
GENERAL INFORMATION
WARNING
B-Vent appliances are not
designed to operate in negatively
pressured environments (pressure within the home is less than
pressures outside). Significant
negatively pressured environments caused by weather, home
design, or other devices may
impact the operation of these
appliances. Negative pressures may result in poor flame
appearance, sooting, damage to
property and/or severe personal
injury. Do not operate these
appliances in negatively pressured environments.
WARNING
Young children should be carefully supervised when they are
in the same room as the appliance. Toddlers, young children
and others may be susceptible
to accidental contact burns. A
physical barrier is recommended
if there are at risk individuals in
the house. To restrict access to
a fireplace or stove, install an
adjustable safety gate to keep
toddlers, young children and
other at risk individuals out of
the room and away from hot
surfaces.
AVERTISSEMENT
Les jeunes enfants devraient être
surveillés étroitement lorsqu’ils
se trouvent dans la même pièce
que l’appareil. Les tout petits,
les jeunes enfants ou les adultes
peuvent subir des brûlures s’ils
viennent en contact avec la surface chaude. Il est recommandé
d’installer une barrière physique
si des personnes à risques habitent la maison. Pour empêcher
l’accès à un foyer ou à un poêle,
installez une barrière de sécurité; cette mesure empêchera les
tout petits, les jeunes enfants et
toute autre personne à risque
d’avoir accès à la pièce et aux
surfaces chaudes.
Children and adults should be alerted to the
hazards of high surface temperature and
should stay away to avoid burns or clothing
ignition.
Les enfants et les adultes devraient être informés des dangers que posent les températures
de surface élevées et se tenir à distance afin
d’éviter des brûlures ou que leurs vêtements
ne s’enflamment.
DO NOT ATTEMPT TO ALTER OR MODIFY
THE CONSTRUCTION OF THE APPLIANCE OR
ITS COMPONENTS. ANY MODIFICATION OR
ALTERATION MAY VOID THE WARRANTY,
CERTIFICATION AND LISTINGS OF THIS UNIT.
2
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause injury
or property damage. Refer to
this manual. For assistance or
additional information consult
a qualified installer, service
agency or the gas supplier.
WARNING
Failure to comply with these
installation instructions will result
in an improperly installed and
operating appliance, voiding its
warranty. Any change to this appliance and/or its operating controls
is dangerous.
WARNING
Clothing or other flammable
material should not be placed
on or near the appliance.
AVERTISSEMENT
On ne devrait pas placer de
vêtements ni d’autres matières
inflammables sur l’appareil ni à
proximité.
WARNING
Any safety screen or guard
removed for servicing the appliance must be replaced prior to
operating the appliance.
AVERTISSEMENT
Tout écran ou protecteur retiré
pour permettre l’entretien de
l’appareil doit être remis en
place avant de mettre l’appareil
en marche.
WARNING
THIS APPLIANCE MAY ONLY BE FITTED
WITH DOORS CERTIFIED FOR USE
WITH THE APPLIANCE.
Installation and repair should be done by
a qualified service person. The appliance
should be inspected before use and at least
annually by a professional service person.
More frequent cleaning may be required due
to excessive lint from carpeting, bedding
material, etcetera. It is imperative that control
compartments, burners and circulating air
passageways of the appliance be kept clean.
L’installation et la réparation devrait être
confiées à un technicien qualifié. L’appareil
devrait faire l’objet d’une inspection par
un technicien professionnel avant d’être
utilisé et au moins une fois l’an par la suite.
Des nettoyages plus fréquents peuvent être
nécessaires si les tapis, la literie, et cetera
produisent une quantité importante de poussière. Il est essentiel que les compartiments
abritant les commandes, les brûleurs et les
conduits de circulation d’air de l’appareil
soient tenus propres.
Do not use this appliance if any part has
been under water. Immediately call a
qualified service technician to inspect the
appliance and to replace any part of the
control system and any gas control which
has been under water.
Ne pas utiliser cet appareil s’il a été plongé,
même partiellement, dans l’eau. Appeler un technicien qualifié pour inspecter
l’appareil et remplacer toute partie du
système de commande et toute commande
qui a été plongée dans l’eau.
Only trim kit(s) supplied by the manufacturer
shall be used in the installation of this appliance.
Seules les trousses de garniture fournies
par le fabricant doivent être utilisées pour
l’installation de cet appareil.
These appliances comply with National Safety
Standards and are tested and listed by Warnock
Hersey (Report No. 3106807) to ANSI Z21.50,
latest edition (in Canada, CSA 2.22, latest edition), and CAN/CGA-2.17-M91 in both USA and
Canada, as vented gas replaces.
Both millivolt and electronic versions of these
appliances may be used in bedrooms (USA
only) when the room is an "unconfined space"
as defined by the National Fuel Gas Code.
Use in bedrooms may not be allowed by your
local building codes. You should obtain prior
approval from the Authority having jurisdiction
prior to installation.
This appliance uses room air for combustion.
It is imperative that provisions for adequate
combustion and ventilation air be made. This
appliance is NOT designed to and will not
operate in a negative pressure.
Misc. Codes / Standards -
The Installation must conform to local codes or,
in the absence of local codes, with the National
Fuel Gas Code, ANSI Z223.1/NFPA 54 - latest
edition (In Canada, the current CAN/CGA-B149.1
installation code).
The appliance, when installed, must be electrically grounded and wired in accordance with
local codes or, in the absence of local codes,
with the National Electrical Code, ANSI/NFPA
70 - latest edition, or the Canadian Electrical
Code, CSA C22.1 - latest edition.
Provide adequate clearances around air openings and adequate accessibility clearance for
service and proper operation. Never obstruct
the front or back openings of the appliance.
These appliances are designed to operate on
natural or propane gas only. The use of other
fuels or combination of fuels will degrade the
performance of this system and may be dangerous.
These replaces are designed as decorative
appliances and are not intended for use as area
heaters. They must Not be equipped with wall
thermostats or remote controls with thermostat
functions.
These appliances must not be connected to a
chimney or ue serving a separate solid fuel
burning appliance.
The appliance area be kept clear and free from
combustible materials, gasoline and other
ammable vapors and liquids.
These appliances are equipped with an integral
combustion air door and actuator arm. Combustion air kits are optional and must be installed
before removing the securing screw allowing
the movement of the combustion air actuator
arm (see Step 7).
Millivolt Models - The millivolt appliances are
manually controlled and feature a spark igniter
(piezo) that allows the appliance's pilot gas to
be lit without the use of matches or batteries.
This system provides continued service in the
event of a power outage. The BTU Input for
these appliances is shown in Table 1.
Electronic Models - Electronic models have a
xed rate gas valve. Input of electronic models
is shown in Table 1.
Input (BTU) Gas Valves (all models)
All Models Fuel Type Input Rate (BTU / HR)
Millivolt Natural 30,000
Millivolt Propane 30,000
Electronic Natural 30,000
Electronic Propane 30,000
Table 1
3
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
EA
TPTH TP TH
P
I
L
O
T
P
I
L
O
T
O
N
it
O
F
F
Gas Pressure - All Models
Tables 2 and 3 show the appliances' inlet and
manifold gas pressure requirements:
Inlet Gas Supply Pressure
(all models)
Fuel # Minimum Maximum
Natural Gas
Propane
4.5" WC
(1.12 kPa)
11.0" WC
(2.74 kPa)
10.5" WC
(2.62 kPa)
13.0" WC
(3.24 kPa)
Table 2
Manifold Gas Supply Pressure
(all models)
Fuel # Low High
Natural
Gas
Propane
(Lo) 2.2" WC
(0.55 kPa)
(Lo) 6.3" WC
(1.57 kPa)
(Hi) 3.5" WC
(0.87 kPa)
(Hi) 10.0" WC
(2.49 kPa)
Table 3
Test gauge connections are provided on the
front of the millivolt gas control valve (identied E for the inlet and A for the manifold
side). A 1/8" NPT test gage connection is
provided at the inlet and manifold side of
the electronic gas control valve.
The appliance and its appliance main gas
valve must be disconnected from the gas
supply piping system during any pressure
testing of that system at test pressures in
excess of 1/2 psi (3.5 kPa).
The appliance must be isolated from the
gas supply piping system by closing its
equipment shutoff valve during any pressure
testing of the gas supply piping system at
test pressures equal to or less than 1/2 psi
(3.5 kPa).
Orifice Sizes - Sea Level to High Altitude
(All Models)
These appliances are tested and approved for
installation at elevations of 0-4500 feet (0-1372
meters) above sea level using the standard burner
orice sizes (marked with an "*" in Table 4). For
elevations above 4500 feet, contact your gas
supplier or qualied service technician.
Deration - At higher elevations, the amount
of BTU fuel value delivered must be reduced
by either:
• Using gas that has been derated by the gas
company.
• By changing the burner orice to a smaller
size as regulated by the local authorities having
jurisdiction and by the (USA) National Fuel Gas
Code NFPA 54/ANSI Z223.1 - latest edition or,
in Canada, the CAN/CGA-B149.1 codes - latest
edition.
Install the appliance according to the regulations
of the local authorities having jurisdiction and,
in the USA, the National Fuel Gas Code NFPA
54 / ANSI Z223.1 - latest edition or, in Canada,
the CAN/CGA-B149.1 - latest edition.
Flame breadth, height and width will diminish
4% for every 1,000 feet of altitude.
In Canada - CAN/CGA-2.17-M91 (R2009) (high
altitude): THE CONVERSION SHALL BE CARRIED OUT BY A MANUFACTURER’S AUTHORIZED REPRESENTATIVE, IN ACCORDANCE
WITH THE REQUIREMENTS OF THE MANUFACTURER, PROVINCIAL OR TERRITORIAL
AUTHORITIES HAVING JURISDICTION AND
IN ACCORDANCE WITH THE REQUIREMENTS
OF THE CAN/CGA-B149.1 OR CAN/CGA-B149.2
INSTALLATION CODES.
Burner Orifice Sizes (all models)
Elevation
Feet (meters)
0-4500
(0-1372)
Table 4
• Part /Cat. Number
Natural
Gas
drill size (inches)
#37 (0.104")
H5830 •
* Standard size installed at factory
*
1.65mm
Propane
Gas
drill size (inches)
(0.065")
H5831 •
*
Gas Valve Diagrams
See Figure 1 for Millivolt models and Figure 2
For Electronic Models.
Manifold Pressure Tap
Pilot Adjustment
Screw
Inlet Pressure Tap
Piezo
Igniter
Main Gas Control Knob
OFF/PILOT/ON
Figure 1 - SIT Millivolt Gas Valve
OFF
ON
ON/OFF Switch
IN
PSI
Inlet
Pressure
Port
Electronic
Gas Control
Valve
Manifold Pressure Port
CONTROL
IGNITER
Figure 2 - Honeywell Electronic Gas Valve
REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS
These replaces are approved for installation in
the US state of Massachusetts if the following
additional requirements are met:
• Install this appliance in accordance with
Massachusetts Rules and Regulations 248
C.M.R.
• Installation and repair must be done by a
plumber or gas tter licensed in the Commonwealth of Massachusetts.
• The exible gas line connector used shall
not exceed 36 inches (92 centimeters) in
length.
• The individual manual shut-off must be a
T-handle type valve.
4
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
COLD CLIMATE INSULATION
For cold climate installations, seal all cracks
around your appliance with noncombustible
material and wherever cold air could enter
the room. It is especially important to insulate
outside chase cavity between studs and under
oor on which appliance rests, if oor is above
ground level. Gas line holes and other openings should be caulked or stuffed with unfaced
berglass insulation.
If the replace is being installed on a cement
slab in cold climates, a sheet of plywood or
other raised platform can be placed underneath
to prevent cold transfer to the replace and into
the room. It also helps to sheetrock inside
surfaces and tape for maximum air tightness
and caulk restops.
MANUFACTURED HOUSING
B-Vent Fireplaces are not approved for use in
OEM or aftermarket manufactured housing built
to HUD standards.
LOCATION
Typical Locations
Figure 3
VENT TERMINATION CLEARANCES
These instructions should be used as a
guideline and do not supersede local codes
in any way. Install venting according to local
codes, these instructions, the current National
Fuel Gas Code (ANSI-Z223.1) in the USA or
the current standards of CAN/CGA-B149.1
in Canada.
Vertical Vent Termination Clearances
Gas vent caps that are located 8 ft. or more
from a portion of a building which extends
at an angle greater than 45° upward from the
horizontal may terminate in accordance with
Figure 4 , provided that in no case shall any
discharge opening on the cap be less than 2
ft. (.6 m) horizontally from the roof surface
(National Fuel Gas Code ANSI Z223.1 (NFPA
(CAN/CGA B149.1).
54)
Multiple Terminations
These appliances may vent adjacent to and at
the same level with any other gas appliances
(including direct-vent appliances) provided that
there is at least 2 ft. (0.6m) between the proximal
edges of the vent caps. These appliances may
be vented adjacent to a chimney vent servicing
a solid fuel replace provided the B-vent cap
is at least 2 ft. (0.6m) away from the nearest
point of the chimney opening.
Multiple Terminations
2 ft.
(0.6m)
Minimum
In selecting the location, the aesthetic and
functional use of the appliance are primary
concerns. However, vent system routing to
the exterior and access to the fuel supply are
also important.
Due to high temperatures, the appliance
should be located out of traffic and away from
furniture and draperies (Figure 3).
En raison des températures élevées,
l’appareil devrait être installé dans un endroit
où il y a peu de circulation et loin du mobilier
et des tentures (Figure 3).
The location should also be free of electrical,
plumbing or other heating/air conditioning
ducting.
Be aware that this is a heat producing appliance. Objects placed above the unit are
exposed to elevated temperatures.
Do not insulate the space between the appliance and the area above it.
The appliance must be mounted on a fully supported base extending the full width and depth of
the unit. The appliance may be located on or near
conventional construction materials. However,
if installed on combustible materials, such as
carpeting, vinyl tile or other combustible material
other than wood ooring, the appliance shall be
installed on a metal or wood panel extending the
full width and depth of the appliance.
Gas Vent Rule - Gas vent caps are not permitted
within 8 ft. (2.4 m) of a vertical wall or similar
obstruction.
Vertical Vent Termination Clearances
X
12
Roof Pitch is X/12
Minimum Height from Roof
to Lowest Discharge Opening
The vent / air intake termination clearances
above the high side of an angled roof is as
shown in the following chart:
Figure 4
Figure 5
Termination Heights For Vents
Above Flat Or Sloped Roofs
Ref. NFPA 54 / ANSI Z223.1
Roof Pitch * Feet * Meters
Flat to 6/12 1.0 0.3
6/12 to 7/12 1.25 0.38
7/12 to 8/12 1.5 0.46
8/12 to 9/12 2.0 0.61
9/12 to 10/12 2.5 0.76
10/12 to 11/12 3.25 0.99
11/12 to 12/12 4.0 1.22
12/12 to 14/12 5.0 1.52
14/12 to 16/12 6.0 1.83
16/12 to 18/12 7.0 2.13
18/12 to 20/12 7.5 2.29
20/12 to 21/12 8.0 2.44
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
5
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
Fireplace
Opening
Spacer
Finished
Wall
Header
123456789
1011
12
9
10
11
12
Combustible Mantel Clearances
Inches
Min. Height of Mantel
Above Fireplace
Opening
Max.Length of Mantels
Three mantels are shown (dark gray elongated rectangles)one, 1-1/2 in. long at a min. of 8-3/8 in. above the fireplace opening;
the second, 8 in. long at a min. of 12 in. above the fireplace opening;
the third, 12 in. long at a min. of 14-1/4 in. above the fireplace opening;
for any mantels between these three in length, they must be located
within the lighter gray shaded area.
0
0
8-3/8
1-1/2
8
13
14
14-1/4
64"
(1626 mm)
Min. to
Ceiling
14-1/2" Min.
(368 mm)
0" (0 mm) Clearance
to Combustible
Side Wall
Max. Projection 12" (305 mm)
Combustible
Mantel
CLEARANCES
Minimum clearance to combustibles for the
appliance is as follows: sides and back - 0" (0
mm), oor - 0" (0 mm), adjacent wall - 0" (0
mm), ceiling - 64" (1625 mm). Service Clearances, Front - 3' (0.9 m).
NOTE: 3" (75 mm) minimum clearance is
required above any inclined vent component.
1" minimum clearance is required to the sides
of vertical vent.
Hearth Extension - A hearth extension is not
required with this appliance. If a hearth extension is used, do not block the lower control
compartment door. Any hearth extension used
is for appearance only and does not have to
conform to standard hearth extension installation requirements.
Wall Finishes / Surrounds / Mantels
NOTE: Combustible wall finish materials and/
or surround materials must not be allowed to
encroach the area defined by the appliance
front face (black sheet metal). Never allow
combustible materials to be positioned in
front of or overlapping the appliance face.
Non-combustible materials, such as surrounds
and other appliance trim, may be installed on
the appliance face with these exceptions: they
must not cover any portion of the removable
glass panel or control compartment.
Vertical installation clearances to combustible
mantels vary according to the depth of the
mantel. See Figure 6. Mantels constructed of
non-combustible materials may be installed
at any height above the appliance opening;
however, do not allow anything to hang below
the replace hood.
Minimum clearance requirements include any
projections such as shelves, window sills,
mantels, etc. above the appliance.
NOTE: We recommend the use of high temperature paint (rated 175° F or higher) on the
underside of the mantel.
Wall Details and Combustible Mantels -
Complete nished interior wall. To install the
appliance facing ush with the nished wall,
position framework to accommodate the
thickness of the nished wall (Figure 6). This
Figure also indicates vertical installation clearances to combustible mantels. Figure 7 also
shows an example of a combustible mantel
shelf projecting a maximum of 12" (305 mm)
from the wall, and which must be installed a
minimum distance of 14-1/2" (368 mm) from
the top of the rebox opening.
6
Figure 6
Figure 7
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
Header
B
A
Fireplace Framing
C
A
G
Inside Chase
HH
Back Wall of Chase/Enclosure
Including Finising Materials
if any
Rough
Framing Face
(Unfinished Shown)
APPLIANCE AND FRAMING SPECIFICATIONS
12-1/2"
8-3/8"
(213 mm)
22-5/16"
(566 mm)
(318 mm)
41"
(1041 mm)
45"
(1143 mm)
Front
2"
(51 mm)
13-3/8"
(340 mm)
(1092 mm)
7-3/16"
(186 mm)
Fireplace Top Spacer
43"
Fireplace
Top Spacer
1"
(25 mm)
21-1/4"
(540 mm)
Left Side
8-3/16"
(208 mm)
38"
(965 mm)
(1194 mm)
Combustion
Air Inlet
19"
(483 mm)
Gas Line
Access
31-9/16"
(802 mm)
12-1/2"
(318 mm)
47"
Top View
45"
(1143 mm)
(206 mm)
Right Side
5-7/8"
(149 mm)
8-1/8"
21-1/4"
(540 mm)
9-7/8"
(251 mm)
12-7/8"
(327 mm)
21-1/4"
(540 mm)
(1092 mm)
3-3/8"
(83 mm)
43"
Junction
Box
Rough
Framing Face
(Unfinished Shown)
J
Back Wall of Chase/Enclosure
Including Finising Materials
C
A
Outside Chase
Back Wall of Chase/Enclosure
Including Finising Materials
if any
if any
D
C
A
E
(Unfinished Shown)
Corner Installation
G
G
Rough
Framing Face
F
LMBV-42
Figure 8
Fireplace Framing Dimensions - inches (millimeters)
A B C D E F G H* J K
46-1/4
43-1/2
(1175)
(1105)33(838)
17-1/2
(445)
76-1/4
38-1/8
(1937)
21-5/8
(968)
(549)8(203)
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
20-5/8
(524)
53-7/8
(1368)
NOTE: All framing dimensions calculated for
1/2" dry wall at the appliance face. If sheathing the chase or finishing with other thickness
materials, calculations will need to be made.
7
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
RIGHT
SIDE
7-3/4"
(197 mm)
3-3/8"
(86 mm)
8
WARNING
Failure to position the parts in
accordance with these diagrams
or failure to use only parts specifically approved with this appliance
may result in property damage or
personal injury.
AVERTISSEMENT
Risque de dommages ou de
blessures si les pièces ne sont
pas installées conformément à
ces schémas et ou si des pièces
autres que celles spécifiquement
approuvées avec cet appareil sont
utilisées.
PRE-INSTALLATION STEPS
The replace may be installed directly on a
combustible oor or raised on a platform of
an appropriate height. Do not place replace on
carpeting, vinyl or other soft oor coverings. It
may, however, be placed on at wood, plywood,
particle board or other hard surfaces. Be sure
replace rests on a solid continuous oor or
platform with appropriate framing for support
and so that no cold air can enter the room from
under the replace.
The replace may be positioned and then the
framing built around it, or the framing may be
constructed and the replace positioned into
the opening.
Usually, no special oor support is needed for
the replace, however, to be certain:
1. Estimate the total weight of the replace
system and surround materials such as
brick, stone, etc., to be installed.
2. Measure the square footage of the oor
space to be occupied by the system, surrounds and hearth extensions.
3. Note the oor construction, i.e. 2 x 6’s, 2 x
8’s or 2 x 10’s, single or double joists, type
and thickness of oor boards.
4. Use this information and consult your lo-
cal building code to determine if you need
additional support.
If you plan to raise the replace and hearth
extension, build the platform assembly then
position replace and hearth extension on
top. Secure the platform to the oor to prevent
possible shifting.
TYPICAL INSTALLATION SEQUENCE
The typical sequence of installation is outlined
below; however, each installation is unique,
resulting in variations to the steps described
herein.
Framing Specications ...................... page 6
Pre-Installation Notes ....................... page 6
Installing the Fireplace:
Step 1. Construct Appliance
Framing ...................... Page 6
Step 2. Route Gas Line ................. Page 7
Step 3. Position Appliance ............ Page 7
Step 4. Install Vent System and
Exterior Termination ...Page 7
Step 5. Field Wiring; Install (Optional)
Wall Switch ................Page 8
Step 6. Connect to Gas Line ......... Page 8
Step 7. Install (Optional) Outside
Air Kit ......................... Page 9
Step 8. Install Logs and
Glowing Embers ......... Page 10
Appliance Operation:
Step 9. Check Appliance
Operation ....................Page 10
Manual Limit Switch .... Page 10
Millivolt Checkout ........ Page 10
Electronic Checkout ..... Page 10
Step 10. Adjust Burner ...................Page 11
Step 11. Attach "Safety-in-
Operation" Warnings ..... Page 12
INSTALLING THE FIREPLACE
Step 1. Construct Appliance Framing
Frame appliance enclosure as illustrated in
Figure 8.
NOTE: The nailing flanges, combustible framing
members and screw heads located in areas
directly adjacent to the nailing flanges, are
EXEMPT from the 1/2" clearance to combustible
requirements for the firebox wrapper. Combustible framing may be in direct contact with the
nailing flanges and may be located closer than
1/2" from screw heads and the firebox wrapper
in areas adjacent to the nailing flanges. Frame
the opening to the exact dimensions specified
in the framing details of this manual.
NOTE: The framed depth, 21-5/8" (549 mm)
from a framed wall, must always be measured
from a finished surface. If a wall covering such
as drywall is to be attached to the rear wall,
then the 21-5/8" (549 mm) must be measured
from the drywall surface. It is important that
this dimension be exact.
If the appliance is to be elevated above oor
level, a solid continuous platform must be
constructed.
The header may rest on the top metal spacers,
but must not be notched to t around them.
Consult all local codes.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Step 2. Route Gas Supply Line
Refer to Figure 9. Using techniques and materials prescribed by local and/or national codes. It
is recommended that a gas line of 1/2" or greater
diameter be used to allow full gas volume to
the replace. Undue pressure loss will occur if
the pipe is too small. The appliance, as set up
at the factory, is best suited for use with a gas
line routed from the right side. The gas line may
however be alternately routed from the left side.
7-5/8"
(194mm)
3-1/8"
Figure 9
NOTE: Ensure the Millivolt valve wire is not
routed through the same hole as the gas line.
Route the Millivolt wire through the opposite
side from the gas line.
When rigid pipe is used, an ANSI approved
manual shut-off valve and union must be
installed upstream of the replace.
Ensure that a sediment trap is installed in the
existing gas line, if not, install a sediment trap
upstream to prevent moisture and contaminants
from passing through trap to the appliance
controls and burners. Failure to do so could
prevent the appliance from operating reliably.
An external regulator must be used on all propane (L.P.G). appliances to reduce the supply
tank pressure to 13" w.c. (maximum). Any
copper tubing used to supply propane (L.P.G).
from the tank must be internally tinned.
IMPORTANT: HOLD GAS VALVE SECURELY TO
PREVENT MOVEMENT WHEN CONNECTING TO
INLET GAS LINE
(79mm)
WARNING
CONNECTING DIRECTLY TO AN UNREGULATED PROPANE (L.P.G). TANK
MAY CAUSE AN EXPLOSION.
All appliances are equipped with a gas ex line
and shutoff valve attached directly to the gas
control valve. To quickly and easily complete
the gas line routing, use the gas ex line kit.
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
6”
Type B-Vent
Flue Outlet
Collar
Securing
Screws
Step 3. Position Appliance
Slide the replace into prepared framing or position replace in its nal position and frame later.
Refer to replace drawings and specications
on Page 7 for framing dimensions and details.
Framing header may be positioned directly on
the replace top spacers.
IMPORTANT: UNDER NO CIRCUMSTANCES
CAN THE FIREPLACE TOP SPACERS (REFER
TO FIGURE 8) BE REMOVED OR MODIFIED,
NOR MAY YOU NOTCH THE HEADER TO FIT
AROUND OR BE INSTALLED LOWER THAN THE
SPACERS. THE HEADER MAY BE IN DIRECT
CONTACT WITH THE TOP SPACERS BUT MAY
NOT BE SUPPORTED BY THEM.
Fireplace should be secured to side framing
members using the full length 1/2" nailing
anges that are integral to the appliance at each
side. Use 8d nails or equivalent.
NOTE: The nailing tabs and the area directly
behind the nailing tabs are exempt from the clearances described on the fireplace clearance label.
Step 4. Install Vent System and
Exterior Termination
A. Connect a 6" (152 mm) Type B vent system
to the appliance ue collar with four (4)
No. 8 sheet metal screws (Figure 10) and
install the remainder of the Type B vent to
the outside.
B. The following venting congurations may
be installed (see Figure 11):
- Vertical - Minimum overall height of
the vent system and appliance without an
offset must be 12' (3.66 m)
- With Offset
a. Minimum overall height of the vent
system and appliance must be 12' (3.66
m) when an offset up to 45 degrees
from the vertical is used. There must
be a minimum vertical vent height of
2 ft (0.6 m) above the appliance collar
before the offset can be applied.
b. Minimum overall height of the vent
system and appliance must be 15'
(4.57 m) when an offset, more than
45 degrees but less than 60 degrees
from the vertical, is used. There must
be a minimum vertical vent height of
2 ft (0.6 m) above the appliance collar
before the offset can be applied.
- With Offset, when using the optional,
42GEP or 42GEP-BB, non-operable glass
doors
Minimum overall height of the vent system
and appliance must be 12' (3.66 m) when
an offset up to 60 degrees from the vertical
is used. The lower part of the offset may
start at the appliance ue collar.
Maximum overall height of the vent system and
appliance should not exceed 40 feet (12.19 m).
Install the B-vent system in accordance with the
vent manufacturer's instructions.
CAUTION: THIS APPLIANCE CANNOT BE
VENTED HORIZONTALLY.
NOTE: Refer to the vent manufacturers installation instructions for variations of venting
techniques. If common venting of several units
is contemplated, it should be discussed with an
architect and the local Building Department.
Install the B-vent system in accordance with
the vent manufacturer's instructions.
Figure 10
12 ft.
Minimum
Figure 11
Back View
Of Appliance
1
*12 ft. Min.
**15 ft. Min.
Of Appliance
*with an offset up to 45 degrees
** with an offset greater than 45
degrees and up to 60 degrees
2 3
Minimum
Back View
2 ft.
Minimum
To Offset
12 ft.
Back View
Of Appliance
*This Vent Configuration
Allowable only With The
Following optional Non-
Operable Glass Doors Installed:
42GEP or 42GEP-BB
CAUTION
THIS APPLIANCE CANNOT BE VENTED HORIZONTALLY.
60*
degrees
Maximum
9
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
0.375"
0.375"
0.25" Ø
NOT FOR USE WITH SOLID FUEL
CAUTION:
Hot while in operation. Do not
touch. Severe Burns may result. Keep children, clothing,
furniture, gasoline and other liquids having flammable
vapors away.
CAUTION:
Do not operate the appliance with
factory installed refractory panel(s) removed, cracked or
broken. Replacement of the factory installed refractory
panel(s) should be completed by a licensed or qualified
service person.
WARNING:
Improper installation, adjustment,
alteration, service or maintenance can cause injury
or property damage. Refer to the owner’s information
manual provided with this appliance. For assistance
or additional information consult a qualified installer,
service agency or the gas supplier.
Due to high temperatures, keep children, and furniture
away.
Keep burner and control compartment clean. See
installation and operating instructions accompanying
appliance.
WARNING:
Do not connect 120 V AC to the control valve.
THIS APPLIANCE MUST BE INSTALLED IN ACCORDANCE
WITH LOCAL CODES, IF ANY; IF NONE, FOLLOW THE
NATIONAL FUEL GAS CODE, ANSI Z223.1, OR NATURAL
GAS AND PROPANE INSTALLATION CODE, CSA B149.1.
If not installed, and maintained in accordance with the
manufacturer's instructions, this product could expose
you to substances in fuel or fuel combustion which are
known to the state of California to cause cancer, birth
defects, or other reproductive harm.
* For a copy of the homeowner’s care and operation
manual, go to www.lennox.com or call 1-800-9-lennox.
B-VENTED APPLIANCES NEED FRESH AIR FOR SAFE
OPERATION AND MUST BE INSTALLED SO THERE
ARE PROVISIONS FOR ADEQUATE COMBUSTION AND
VENTILATION AIR.
DIRECT VENTED APPLIANCES MUST NOT BE OPERATED
WITHOUT THE FRONT GLASS PANEL(S) INSTALLED.
DO NOT OPERATE APPLIANCE WITH BROKEN,
CRACKED OR MISSING GLASS DOORS OR ENCLOSURE
PANEL(S).
ELECTRONIC IGNITION WIRING DIAGRAM
Optional Blower**
Junction Box
Break Off Tab
Junction Box
J-Box Wiring
WITH Optional Blower Switch
J-Box Wiring
WITHOUT Optional Blower Switch
BK
W
G
CAV 021
BK
W
G
CAV 021
Switch, Unit Mounted On/Off Switch,
Wall Thermostat (Direct-Vent Units
Only) or Remote Control Switch.
Some models are not approved for
use with an optional blower. See Care
and Operation manual for approved
Schematic Representation Only
W
GR
BK
BK
R
1. If any of the original wire as supplied
must be replaced, use Type AWM
2. 120 VAC, 60 Hz - Less than 3 Amps.
CAUTION: label all wires prior to
disconnection when servicing controls.
Wiring errors can cause improper and
dangerous operation. Verify proper
0.375"
0.375"
J-Box Wiring
WITHOUT Optional Blower Switch
Step 5. Field Wiring; Install Optional
Wall Switch
Refer to Section A, below, for millivolt appliances
and Section B, below, for electronic appliances.
A. Millivolt Wiring
The gas valve has been set in place and has
been pre-wired at the factory. No additional
wiring is required unless the optional wall
switch or optional remote control kit is to be
installed. Locate the optional wall switch or
optional remote control in the desired location
and connect the millivolt wire (see Figure 12).
CAUTION: DO NOT CONNECT THE WALL
SWITCH TO A 120V POWER SUPPLY.
NOTE: Optional wall switch not supplied. If the
optional wall switch is not installed, the ends of
the 15' coiled wire must be connected with a wire
nut (not supplied) for the appliance to operate.
B. Electronic Wiring
The electronic appliance must be connected to
the main power supply. To install:
1. Route a 3-wire 120V 60Hz power supply
to the appliance junction box and ground.
(See Figures 13 and 14 ).
2. Locate and install a low voltage (24V)
wall switch (not supplied) in the desired
location. Connect the low voltage wire to
this switch (see Figure 13).
3. After wiring is complete, replace the appliance junction box cover and secure with
the hex head screws previously removed.
MILLIVOLT WIRING DIAGRAM
NOTE: If any supplied wire must be replaced,
always use Type AWM, 105°C, 18 GA wire.
BK
DAMPER
SWITCH
LIMIT
SWITCH
BK
BK WHT
BK
THERMOPILE
TP
TH
TP
TH
*
FACTORY WIRED
FIELD WIRED
For optional wall switch attachment only.
*
Figure 12
Control
Switch *
Figure 13
CAUTION
Ground supply lead must be connected to the wire attached to the
green ground screw located on the
outlet box. See
Figure 14. Failure to
do so will result in a potential safety
hazard. The appliance must be
electrically grounded in accordance
with local codes or, in the absence of
local codes, the National Electrical
Code, ANSI/NFPA 70-latest edition.
(In Canada, the current CSA C22.1
Canadian Electrical Code).
OFF/ON Switch
Pilot Burner
Assembly
BL
BL
BK
BK = BLACK BL = BLUE
R = RED W = WHITE
G = GREEN
DAMPER
SWITCH
B-Vent appliances only - one or both of these switches must
be factory installed in series as shown. If wires to these switches
are replaced, wires must be Type AWM 200°C - 18 gage wire ONLY.
NOTES:
1. If any of the original wire as supplied must be replaced, use Type AWM 105°C - 18 gage wire ONLY.
2. 120 VAC, 60 Hz - Less than 3 Amps.
CAUTION: label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after servicing.
* Control Switches: Wall On/Off Switch or Timer, Unit Mounted On/Off Switch, or Remote Control Switch. If an optional
control switch is installed, turn the appliance-mounted ON/OFF burner control switch to the OFF position.
(Integral with
Gas Valve)
Honeywell
Electronic
Gas
Valve
Igniter
Connector
BK
HIGH LIMIT
SWITCH
ELECTRONIC IGNITION WIRING DIAGRAM
24 V
Secondary
GROUND
120 VAC
Primary
Field Wired
Factory
Wired
R
BK
BK
Transformer
BL
Control Switches: Wall On/Off
*
J-Box Wiring
**
accessories.
NOTES:
105°C - 18 gage wire ONLY.
operation after servicing.
BK
W
G
Junction Box
CAV 021
10
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
Gas
Valve
3/8" NPT x
Flare Fitting
3/8" Flex Tubing
3/8" Nipple
3/8" Union
3/8" Close
Nipple
3/8" Shut-off Valve
1/2" x 3/8"
Reducer
Gas
Stub
1/2" x 3/8" Flare
Shut-off Valve
Gas Solid Line Connector
Gas Flex Line Connector
*Sediment
Trap
3"
Min
Refractory
Access Panel
SIT Valve Shown
Gas Controls
on Valve
Piezo
Igniter
White
(Supply)
Black
(Supply)
Bipolar
Terminal
Screw
120 Vac
60 Hz
Green Wire Ground
Connection
Red
(Supply)
120 Vac
60 Hz
120 Vac
60 Hz
NOTE: Supply wires may be alternatively connected to the outlet using the screw terminals,
however the black supply wire must be wired to a terminal that is opposite (across the outlet) the
point where the white supply wire is connected.
Step 6. Connect to Gas Line
Make gas line connections. All codes require a
shut-off valve mounted in the supply line. Figure
16 illustrates two methods for connecting the
gas supply. The ex-line method is acceptable
in the U.S., however, Canadian requirements
vary depending on locality. Installation must be
in compliance with local codes. The gas control
valve is located in the lower control compartment. To access the valve remove the refractory
access panel and set aside (Figure 15 ).
Figure 14
Figure 16 - Gas Connection
Figure 15
NOTE: The gas supply line
must be installed in accordance with building codes
by a qualified installer
approved and/or licensed
as required by the locality.
In the Commonwealth of
Massachusetts, installation
must be performed by a
licensed plumber or gas
fitter.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
The millivolt control valve has a 3/8"
(10 mm) NPT thread inlet port.
The electronic control valve has a 1/2" (13 mm)
NPT thread inlet port and is tted with a 1/2" x
3/8" (13 mm x 10 mm) NPT tting.
Both the millivolt and electronic models are
tted with a 3" (76 mm) long nipple, 3/8" NPT.
Plan the connections accordingly.
Secure all joints tightly using appropriate
tools and sealing compounds (ensure propane
resistant compounds are used in propane
applications).
TEST ALL CONNECTIONS FOR GAS LEAKS
(FACTORY AND FIELD):
WARNING
Never use an open flame to
check for leaks.
Turn on gas supply and test for gas leaks, using a gas leak test solution (also referred to as
bubble leak solution).
NOTE: Using a soapy water solution (50%
dish soap, 50% water) is an effective leak test
solution but it is not recommended, because
the soap residue that is left on the pipes/ttings
can result in corrosion over time.
A. Light the appliance (refer to the lighting
instructions label in the control compartment
or in the Homeowner's Care and Operation
Instructions).
B. Brush all joints and connections with the
gas leak test solution to check for leaks. If
bubbles are formed, or gas odor is detected,
turn the gas control knob to the “OFF” position. Either tighten or refasten the leaking
connection and retest as described above.
C. When the gas lines are tested and leak free,
be sure to rinse off the leak testing solution.
D. When the gas lines are tested and leak free,
observe the individual tongues of ame on
the burner. Make sure all ports are open and
producing ame evenly across the burner. If
any ports are blocked, or partially blocked,
clean out the ports.
11
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
Step 7. Install (Optional) Outside
Air Kit
These appliances are equipped with an outside (make-up) air door and integral actuator
arm. If the appliance is to be installed with
an outside air vent system, use only Lennox
Hearth Products Models FAOK-4 or FAOK-4LD
Combustion Air Kits.
After completing the installation of the optional
combustion air vent system the actuator arm
must be put in service and tested to ensure
proper operation before completing any enclosure around the rebox. Failure to do so may
result in extensive and costly rework.
WARNING
DO NOT REMOVE THE ACTUATOR
ARM LOCKING SCREW UNLESS THE
COMPLETE OUTSIDE AIR VENT SYSTEM
HAS BEEN INSTALLED IN ACCORDANCE
WITH THE DETAILED INSTRUCTIONS
PROVIDED WITH THE KIT.
Locate the actuator arm along the right side
of the appliance rebox opening and refer to
Figure 17. After completing the installation
of the Outside Combustion Air Kit remove and
discard the actuator arm locking screw.
To operate, push the end of the actuator to
the left as shown in Figure 17, until it "pops"
free of its "locked" position. Pull the actuator
forward to open the combustion air door, and
push it back to close. To "lock" the combustion
air door closed, ensure the actuator is pushed
all the way back then push the end of the actuators to the right until the step in the actuator
moves behind the appliance front face within
the slotted opening.
Operate the actuator through several cycles
including the "lock" position. Ensuring proper
operation and freedom of movement. Return
the actuator arm to the locked position.
Combustion Air
Actuator
Remove Locking Screw
and “Pop” Actuator to the
Left Before Initial Use
Pull Forward to Open,
Push Back to Close
Figure 17
CAUTION
Never locate inlet where it can be
blocked by shrubs, snow drifts,
etc. Never locate inlet in garage
or any area where there is another
fuel burning appliance or products
emitting combustible gases such
as paint, gasoline, etc. In cold
climates, it is recommended the
outside air duct be insulated.
Step 8. Install Logs and Glowing
Embers
The logs are packaged and boxed within the
rebox. The bag of glowing embers is in the
lower control compartment. Remove the glowing embers from the packaging and tear into
quarter size pieces (see the Care and Operation
Instructions).
Carefully position the ceramic ber log assembly
onto the burner, refer to the Care and Operation Instructions for detailed log description
and placement instructions. Position the logs
onto the pins of the burner, with the cutouts
tted around the burner tube. Ensure the rear
log matches the cutout on its bottom with the
position of the pilot.
WARNING
• DO NOT attempt to install the
logs until the appliance installation has been completed, the
gas line connected and tested
for leaks and the initial burner
operation has been checked
out.
The size and position of the log
•
set was engineered to give the
appliance a safe, reliable and
attractive flame pattern. Any
attempt to use a different log
set in the fireplace will void
the warranty and will result in
incomplete combustion, sooting, and poor flame quality.
Logs get very hot and will
•
remain hot up to one hour
after gas supply is turned off.
Handle only when logs are
cool. Turn off all electricity
to the appliance before you
install grate and logs.
This appliance is not designed
•
to burn wood. Any attempt to
do so could cause irreparable
damage to the appliance and
prove hazardous to your safety.
If logs are not installed
•
according to the log installation instructions, flame
impingement and improper
combustion could occur and
result in soot and/or excessive
production of carbon monoxide
(CO), a colorless, odorless,
toxic gas.
12
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
Proper log placement is critical to prevent sooting. Carefully position the ceramic ber logs
over the burner as described in the following
steps, and detailed in Figures 18 through 23.
NOTE: Logs should be placed in the gaps between the flame peaks and should be positioned
so that at no time they impinge the flames.
Step 1. Remove the glowing embers (rockwool) from the packaging and tear into nickel
size pieces. Spread the glowing embers evenly
on top of the burner. Do not use more than is
necessary. The glowing embers should not
cover the burner ports, as shown in Figure 18.
Step 2. Place the hole at the bottom of the Rear
Log over the pin at the rear of the log grate, as
shown in Figure 19. The log should rest against
the back refractory.
Step 3. Place the Rear Top Log over the left side
of the Rear Log. Lay the log over the top left
corner of the Rear Log, as shown in Figure 20.
The log should rest against the back refractory.
Step 4. Engage the bottom hole of the Front
Left Log with designated pin on the grate, and
align the bottom groove of the log over the far
left grate bar. See Figure 21.
Step 5. Engage the bottom hole of the Front
Right Log with designated pin on the far right
grate bar. Align the groove on the bottom of the
log over the far right grate bar. See Figure 22.
Rear Log Pin
Glowing Embers (rockwool)
Figure 18
Rear Log
Figure 19
Rear Top Log
Burner Ports
Rear Log
Front Left Log
Figure 21
Front Right Log
Figure 22
Front Right Log Pin
Notch In Rear Log
Front Right Log Pin
Top Right Log
Step 6. Engage the bottom hole of the Top
Right Log, over the pin on the Front Right Log.
Rest the upper portion of the log in the notch
of the Rear Log. See Figure 23.
Figure 20
Figure 23
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
13
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
Limit Switch Screws
Manual
Reset
Limit
Switch
Screen
Rod
Lintel Extension Right Side Refractory Panel
Screen
3/8” Min
(9 mm)
Hood
Pilot
Nozzels
Igniter Rod
SIT Valve
APPLIANCE OPERATION
Step 9. Check Appliance Operation
With the gas line installed, run initial system
checkout before closing up the front of the unit.
Follow the pilot lighting instructions provided in
the Care and Operation Instructions. The piezo
Igniter is located in the control compartment
(see Figure 15).
NOTE: Instructions are also found on the pull
out labels attached to the gas control valve.
The valve is shown in Figure 24.
Figure 25
Manual Limit Switch
(manually-reset blocked flue safety switch)
14
This appliance is equipped with a manuallyreset blocked ue safety switch. Refer to
Figure 25 for its location. If during appliance
Figure 24
operation, the ame goes out (independently of
the burner on/off wall switch), it may be due to
the operation of this safety limit switch. First
When rst lighting the appliance, it will take
a few minutes for the line to purge itself of
air. Once purging is complete, the pilot and
burner will light and operate as indicated in
the instruction manual.
Subsequent lightings of the appliance will not
require such purging. Inspect the pilot ame
(remove logs, if necessary, handling carefully).
allow the appliance to cool. Then reset the
safety switch by pushing the red reset button
on the back of the switch.
CAUTION: THE ELECTRONIC APPLIANCE
SHOULD BE TURNED OFF BEFORE REMOVING
THE LIMIT SWITCH.
To access the safety limit switch reset button,
remove the screen rod and screen from the right
side of the replace. Unscrew two screws and
remove the limit switch with low voltage wires
attached. Push the reset button, then reinstall
the limit switch. Reinstall the screen and rod. At
this time turn the electronic appliance back on.
The appliance should then relight and remain
lit. If this does not occur, turn off the appli-
ance and call a qualified service technician.
Millivolt Appliance Checkout
The pilot ame should be steady, not lifting
or oating. Flame should be blue in color with
traces of orange at the outer edge.
The top 3/8" (9 mm) at the pilot generator
(thermopile) should be engulfed in the pilot
ame. The ame should project 1" (25 mm)
beyond the hood at all three ports (Figure 26).
Replace logs if removed for pilot inspection.
To light the burner; turn “ON” the remote wall
switch and rotate the gas valve control knob
counterclockwise to the “ON” position (“ON”
will be to the left hand side of the valve).
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Figure 26 - Millivolt Pilot
Electronic Appliance Checkout
To light the burner, turn ‘ON’ the optional remote
wall switch and turn the gas control switch to
the “ON” position. Ensure the Igniter lights the
pilot. The pilot ame should engulf the ame
rod as shown in Figure 27.
Proper Flame
Adjustment
Pilot
Nozzels
3/8" to 1/2"
(9 -13 mm)
Ground
Electrode
Flame Rod
Hot Surface
Igniter
Figure 27 - Electronic Pilot
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
Orifice
Air Shutter
Burner Tube
Adjusting
Set Screw
Step 10. Burner Adjustments
Flame Appearance and Sooting
Proper ame appearance is a ame which is
blue at the base and becomes yellowish-orange
in the body of the ame.
When the appliance is rst lit, the entire ame
may be blue and will gradually turn yellowishorange during the rst 15 minutes of operation.
After 15 minutes of operation, if the ame is
blue, or if the ame is orange with evidence of
sooting (black tip), the air shutter opening may
need to be adjusted.
If the air shutter opening is closed too far,
sooting may develop. Sooting is indicated by
black puffs developing at the tips of very long
orange ames. Sooting results in black deposits
forming on the logs, appliance inside surfaces
and on exterior surfaces adjacent to the vent
termination.
Sooting is caused by incomplete combustion
in the ames and lack of combustion air entering the air shutter opening. To achieve a warm
yellowish-orange ame with an orange body
that does not soot, the shutter opening must be
adjusted between these two extremes.
Air Shutter Adjustment Guidelines
• If there is smoke or soot present, rst check
the log set positioning to ensure that the
ames are not impinging on any of the logs.
If the log set is properly positioned and a
sooting condition still exists, then the air
shutter opening should be increased.
• The more offsets in the vent system, the larger
the air shutter opening will need to be.
• An appliance operated with the air shutter
opened too far, may have ames that appear
blue and transparent. These weak, blue and
transparent ames are termed anemic.
• Propane models may exhibit ames which
candle or appear stringy. If this is present
and persists, adjust the air shutter to a more
closed position, then operate the appliance
for a few more minutes to ensure that the
ame normalizes and the ames do not
appear sooty.
Burner Air Shutter Adjustment Procedure
WARNING
• Air shutter adjustment should
only be performed by a qualified professional service technician.
CAUTION
• Soot will be produced if the
air shutter is closed too much.
Any damage due to carboning
resulting from improperly
setting the air shutter is not
covered under the warranty.
• The air shutter door and nearby
appliance surfaces are hot.
Exercise caution to avoid
injury while adjusting flame
appearance.
Burner Adjustment Procedure
To adjust the ame, position the air shutter to the
nominal setting (Figure 28). Allow the burner
to operate for at least 30 minutes. Observe the
ame continuously. If it appears weak or sooty
as previously described, adjust the air shutter
open or closed until desired effect is achieved.
NOTE: If the flame still appears anemic
with the air shutter closed all the way
(usually a result of lengthy vertical venting runs), turn off the appliance, turn off
the gas supply, wait for the parts to cool
and access the air shutter. The shutter is
prevented from actually closing by a tab
that is bent over into the opening. Remove
this obstruction by bending back. Reassemble and restart the appliance and after
30 minutes reobserve the flame. Adjust
the air shutter as described.
Nominal Air Shutter Settings
Natural Gas - 1/16" (1.59 mm) Open
Propane Gas - 1/4" (6.35 mm) Open
Figure 28
When satised that the appliance operates
properly, proceed to nish the installation.
Leave the control knob/lever in “ON” position
and turn the remote switch “OFF.” Replace the
refractory access panel.
The following chart is provided to aid you in
achieving the correct air shutter adjustment
for your installation.
Air Shutter Adjustment Guidelines:
Amount of
Primary Air
If air shutter is
closed too far
If air shutter is
open too far
Flame
Color
Flame will
be orange
Flame will
be blue
Air Shutter
Adjustment
Air shutter
gap should be
increased
Air shutter
gap should be
decreased
15
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
STEP 11. ATTACHING SAFETY IN OPERATION WARNINGS
It is the installers responsibility to ensure these warnings are properly affixed during installation. These warning labels are a
critical step in informing consumers of safe operation of this appliance.
ATTACHING SAFETY IN OPERATION WARNINGS
It is required that the safety instruction labels furnished with the replace be afxed to the operation
and control point of the replace. A safety instruction
label must be afxed to the wall switch plate where
the replace is turned on and off (See Figure A) and
if used on the remote control handheld transmitter
(Figure B). To properly complete the installation of
this replace, locate the multi-lingual adhesive labels
provided with the Care and Operation Instructions
and proceed as follows:
1. Locate the wall switch that controls the replace
(verify the switch operates the replace by turning it on and off). Clean the wall switch plate
thoroughly to remove any dust and oils. Afx the
label to the surface of the plate of the wall switch
that controls the replace (Figure A). Choose
the language primarily spoken in the home. If
unknown, afx the English language label.
2. If a remote control is used to control the replace,
locate the transmitter and clean it thoroughly
to remove any dust and oils. Afx the label to
the surface of handheld transmitter (Figure B).
Choose the language primarily spoken in the
home. If unknown, afx the English language
label.
3. If you are unable to locate the labels, please call
Lennox Hearth Products or your nearest Lennox
Hearth Products dealer to receive additional
safety instruction labels free of charge.
Cat. No. H8024 Replacement Label Kit
LENNOX HEARTH PRODUCTS
1-800-655-2008
NOTE: English is red text on clear label. French
and Spanish are white text on black label.
APPOSITION DES MISES EN GARDE RELATIVES
À LA SÉCURITÉ D’UTILISATION
Il est impératif que les étiquettes de sécurité fournies avec
le foyer soient collées à côté des dispositifs de contrôle
du foyer. Une étiquette de sécurité doit être collée sur la
plaque de l’interrupteur contrôlant l’allumage du foyer
(voir Figure A) et, le cas échéant, sur le boîtier de la
télécommande (Figure B). Pour achever l’installation
correcte de ce foyer, procédez comme suit avec les
étiquettes adhésives en langues étrangères fournies
avec les instructions d’utilisation et d’entretien :
1. Repérez l’interrupteur qui contrôle le foyer (vériez
que l’interrupteur contrôle le fonctionnement du
foyer en le faisant basculer de Marche à Arrêt, et
vice-versa). Nettoyez soigneusement la plaque
murale de l’interrupteur pour éliminer la poussière
et les traces de graisse ou d’huile. Collez l’étiquette
sur la surface de la plaque de l’interrupteur mural
qui contrôle le foyer (Figure A). Choisissez la
langue qui est principalement parlée dans la
résidence du propriétaire. En cas de doute, collez
l’étiquette en anglais.
2. Si une télécommande est utilisée pour contrôler
le foyer, nettoyez la soigneusement pour éliminer
la poussière et les traces de graisse ou d’huile.
Collez l’étiquette sur le boîtier de la télécommande
(Figure B). Choisissez la langue qui est principalement parlée dans la résidence du propriétaire. En
cas de doute, collez l’étiquette en anglais.
3. Si vous ne trouvez pas les étiquettes, veuillez
appeler Lennox Hearth Products ou votre distributeur Lennox Hearth Products local pour recevoir
gratuitement des étiquettes supplémentaires.
Étiquettes de remplacement, n° cat. H8024
LENNOX HEARTH PRODUCTS
1-800-655-2008
Remarque : Le texte anglais est rouge sur un support
transparent. Le texte français et espagnol est blanc
sur un support noir.
COLOCACIÓN DE ADVERTENCIAS DE SEGURIDAD
EN OPERACIÓN
Se requiere que las etiquetas de instrucciones de
seguridad incluidas con la chimenea se coloquen en
el punto de operación y control de la misma. Se debe
colocar una etiqueta de instrucciones de seguridad
en la placa del interruptor de pared desde el cual se
enciende y se apaga la chimenea (ver la Figura A) y
en el transmisor de control remoto (Figura B) si se
usa. Para completar correctamente la instalación de
esta chimenea, encuentre las etiquetas adhesivas
multilingües incluidas con las instrucciones de cuidado
y operación y haga lo siguiente:
1. Identique el interruptor de pared que controla
la chimenea (verique que el interruptor opera la
chimenea encendiéndola y apagándola). Limpie bien
la placa del interruptor de pared para quitar el polvo
y aceite. Pegue la etiqueta en la supercie de la placa
del interruptor que controla la chimenea (Figura A).
Seleccione el idioma que más se habla en la casa.
Si no sabe cuál es, use la etiqueta en inglés.
2. Si se usa un control remoto para controlar la
chimenea, encuentre el transmisor y límpielo bien
para quitar el polvo y aceite. Pegue la etiqueta en
la supercie del transmisor (Figura B). Seleccione
el idioma que más se habla en la casa. Si no sabe
cuál es, use la etiqueta en inglés.
3. Si no puede encontrar las etiquetas, sírvase llamar a
Lennox Hearth Products o al distribuidor de Lennox
Hearth Products más cercano para recibir etiquetas
de instrucciones de seguridad adicionales gratuitas.
Juego de etiquetas de repuesto - Nº de cat. H8024
LENNOX HEARTH PRODUCTS
1-800-655-2008
Nota: La etiqueta en inglés es transparente con texto
rojo. Las etiquetas en francés y español son negras
con texto blanco.
16
SAFETY LABEL
DIAGRAMS
Illustrations are for example only.
Your accessories may be different.
Les illustrations sont par exemple
uniquement. Vos accessoires
peuvent être différents.
Las ilustraciones son sólo ejemplos.
Tu accesorios pueden ser diferentes.
DIAGRAMMES DES ÉTIQUETTES
DE SÉCURITÉ
Figure A
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
DIAGRAMAS DE ETIQUETAS
DE SEGURIDAD
Figure B
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
INSTALLATION ACCESSORIES
The following accessory items are available for
use in the installation of this appliance.
Cost Effective Solution
• Simple On/Off operation
• Works with millivolt and low voltage electronic
ignition controls
Outside Combustion Air Kits
Cat. No. Model No. Description
81L87 FOAK-4 (with duct)
81L88 FOAK-4LD (without duct)
Outside Air Kits Models FOAK-4 and FOAK-4LD
Outside Air kits are available with duct (FOAK-4)
and without duct (FOAK-4LD) for use if outside
combustion air is required or desired. If model
FOAK-4LD is used it must be used in conjunction
with locally purchased, non-combustible Class
1 or Class 0 exible duct.
Kit includes:
Remote and Receiver
G-Fire Remote, Simple On/Off
Cat. No. Model No. Description
H8840 KIT-RC-G-FIRE Remote Control
Wall Control
• 4-button timer with 30/60/120/OFF minutes
• Wall surface mounted
• Connects to wall switch wire
• Perfect for rental and resort applications
Manual or up to 3 hr Countdown Timer modes
• LCD display
• Displays room temp. in ºF or ºC
• Flame icon and low battery indicator
• Includes batteries
• Wall clip included
• Receiver may be wall mounted or placed in
the control compartment
• Includes white face plate
• Flame icon
• Low battery indicator
• Batteries included
Remote, Two Button, Timer,
On/Off Or Timer Mode
Cat. No. Model No. Description
H8860 RC-S-1 Remote Control
OFF/ON Wall Switch Kit
The OFF/ON wall switch kit may be used to control the
operation of the replace burner. Install the OFF/ON
wall switch in a convenient location near the replace.
White Wall Switch Kit
Cat. No. Model No. Description
85L87 FWSK OFF/ON Wall Switch Kit
Wall Switch, Countdown Timer
Cat. No. Model No. Description
H8863 WS-S-TMR Wall Switch
17
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
Pilot
Orifice
Pressure
Regulator
Remove
These
Components
GAS CONVERSION KITS
WARNING
This conversion kit shall be installed by a qualified service agency in
accordance with the manufacturer’s instructions and all applicable codes
and requirements of the authority having jurisdiction. If the information in
these instruction is not followed exactly, a fire, explosion or production of
carbon monoxide may result causing property damage, personal injury
or loss of life. The qualified service agency is responsible for the proper
installation of this kit. The installation is not proper and complete until the
operation of the converted appliance is checked as specified in the manufacturer’s instructions supplied with the kit. The qualified service agency
performing this installation assumes responsibility for this conversion.
AVERTISSEMENT
Cette trousse de conversion doit être installée par un technicien agréé,
selon les instructions du fabricant et selon toutes les exigences et tous les
codes pertinents de l’autorité compétente. Assurez-vous de bien suivre
les instructions dans cette notice pour réduire au minimum le risque
d’incendie, d’explosion ou la production de monoxyde de carbone pouvant
causer des dommages matériels, des blessures ou la mort. Le tecnicien
agréé est responsable de l’installation de cette trousse. L’installation n’est
pas adéquate ni complète tant que le bon fonctionnement de l’appareil
converti n’a pas été vérifié selon les instructions du fabricant fournies avec
la trousse. Le fournisseur de service qualifié ayant réalisé l'installation
assume les responsabilités liées à la conversion.
Step 1. TURN OFF THE GAS SUPPLY TO THE
APPLIANCE and disconnect power supply
at the circuit breaker. Ensure appliance is
cold. Remove the front glass door/frame (if
used) from the appliance. Access the control
compartment.
Step 2. Carefully remove the logs. Exercise
care as not to break the logs.
Step 3. Locate the screws securing the burner
(tray) to the appliance. Remove the burner and
retain the securing screws.
Millivolt Appliances
Step 4. SIT Systems - Refer to Figure 29
and the instructions provided with the kit.
Using a Torx T20, remove and discard the
three pressure regulator mounting screws.
Remove the pressure regulator, spring,
poppet, diaphragm and bushing. Discard
all removed components.
Ensure the rubber gasket installed on the
back of the replacement pressure regulator
is properly positioned and install the new
pressure regulator using the new screws
supplied with the kit. Tighten screws to
25 in-lbs torque.
18
In Canada
THE CONVERSION SHALL BE CARRIED OUT IN ACCORDANCE WITH THE
REQUIREMENTS OF THE PROVINCIAL
AUTHORITIES HAVING JURISDICTION
AND IN ACCORDANCE WITH THE REQUIREMENTS OF THE CAN/CGA-B149.1
INSTALLATION CODE.
LA CONVERSION DEVRA ÊTRE EFFECTUÉE CONFORMÉMENT AUX RECOMMANDATIONS DES AUTORITÉS
PROVINCIALES AYANT JURIDICTION
ET CONFORMÉMENT AUX EXIGENCES
DU CODE D'INSTALLATION CAN/CGAB149.1.
Gas conversion kits are available to adapt your
appliance from the use of one type of gas to the
use of another. These kits contain instructions
and all the necessary components needed to
complete the task including labeling that must
be afxed to ensure safe operation.
Kit part numbers are listed below and the following steps detail the conversion procedure.
Millivolt Conversion Kits
H5707 — Natural to Propane
H5708 — Propane to Natural
Electronic Conversion Kits
H5709 — Natural to Propane
H5710 — Propane to Natural
CAUTION: THE GAS SUPPLY SHALL BE
SHUT OFF PRIOR TO DISCONNECTING THE
ELECTRICAL POWER, BEFORE PROCEEDING WITH THE CONVERSION.
ATTENTION: AVANT D’EFFECTUER
LA CONVERSION, COUPEZ D’ABORD
L’ALIMENTATION EN GAZ, ENSUITE,
COUPEZ L’ALIMENTATION ÉLECTRIQUE.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Figure 29
Figure 30
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
THIS APPLIANCE HAS BEEN CONVERTED TO:
NATURAL GAS
INPUT BTU/HR – 30,000
MANIFOLD PRESSURE – 3.5"
ORIFICE SIZE – #37 (0.104)
THIS APPLIANCE HAS BEEN CONVERTED TO:
PROPANE/LPG
INPUT BTU/HR – 30,000
MANIFOLD PRESSURE – 10"
ORIFICE SIZE – (0.065)
Step 5. All Millivolt Systems – Attach manometer to the manifold side pressure test
tting and verify manifold pressure reads
3.5" water column (0.87 kPa) for natural
gas, and 10.0" water column (2.49 kPa)
for propane gas.
Step 6. Refer to Figure 30 and remove the
pilot hood assembly to access the hexed pilot
orice. Remove and replace the orice with
the one provided with the kit.
Electronic Appliances
Step 7. Honeywell Electronic Valves - See
Figure 32 and the instructions provided
with the kit. Remove the slotted cap screw,
o-ring, pressure-regulating adjusting screw
and spring. Retain all parts for possible later
use. Install new components from the kit.
Black cap and red spring for propane gas
units. Silver cap and stainless steel spring
fro natural gas units.
Before installing the cap, attach manometer
to the manifold side pressure test tting and
adjust screw until pressure reads 3.5" water
column (0.87 kPa) for natural gas, and 10.0"
water column (2.49 kPa) for propane gas.
Pilot
Orifice
Pilot
Assembly
Igniter
Assembly
IGNITE
Manifold
Pressure
Test Port
Slotted
Cap
CONTROL
OFFION
Inlet Pressure Test Port
PSI
Adjusting
Screw
Spring
Figure 32
See Figure 31 and replace the pilot orice as
follows: Remove the Igniter assembly retainer
clip, and carefully remove the igniter assembly.
Exercise extreme care to prevent damage to
or breakage of the igniter assembly. Remove
the screw securing the pilot assembly to its
mounting bracket. Back off the are nut at
the end of the pilot gas line to free the pilot
assembly from the gas line. Remove the pilot
orice and replace it with the one provided with
the conversion kit. Reinstall the pilot assembly
by reversing the steps detailed here.
When reinstalling the igniter assembly,
use extreme care to prevent damage and
breakage. Do not apply any leverage to
the igniter assembly while restoring the
retainer clip to its original position.
All Models
Step 8. Unscrew the orice from the manifold
and replace it with the one provided with the kit,
#37 (0.104) for natural gas units and (0.065)
for propane (see Figure 33).
Step 9. Reassemble all removed components
by reversing the procedures outlined in the
preceding steps. Use pipe joint compound or
Teon tape on all pipe ttings before installing
(ensure propane resistant compounds are used
in propane applications, do not use pipe joint
compounds on are ttings). Check for leaks
(refer to Page 11, Step 6).
Step 10. Attach appropriate conversion kit
label (see Figure 34) next to the rating plate
on the appliance.
Figure 34
Step 11. Turn on gas supply and test for gas
leaks.
Step 12. Attach manometer to the manifold
side pressure test tting and verify manifold
pressure reads 3.5" water column (0.87 kPa)
for natural gas, and 10.0" water column (2.49
kPa) for propane gas.
Flare Nut
NOTE: If the igniter is damaged, a replacement
kit is available, order Catalog No. 87L54.
Figure 31
Retaining
Clip
Burner Orifice Sizes (all models)
Elevation
Feet (meters)
0-4500
(0-1372)
Table 5
• Part /Cat. Number
Natural
Gas
drill size (inches)
#37 (0.104")
H5830 •
* Standard size installed at factory
*
1.65mm
Propane
Gas
drill size (inches)
H5831 •
Figure 33
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
(0.065")
*
19
LENNOX HEARTH PRODUCTS • MERIT® SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • INSTALLATION INSTRUCTIONS
Lennox Hearth Products reserves the right to make changes at any time, without notice, in
design, materials, specications, prices and also to discontinue colors, styles and products.
Consult your local distributor for replace code information.
LENNOX®, the LENNOX design, DAVE LENNOX, the image of DAVE LENNOX and other related
LENNOX marks are registered or common law trademarks of Lennox Industries Inc. and are
used with permission.
Printed in U.S.A. © 2006 Lennox Hearth Products LLC
P/N 850041M REV. C 04/2013
20
1508 Elm Hill Pike, Suite 108 • Nashville, TN 37210
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