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LENNOX MERIT
®
SERIES B-VENT GAS FIREPLACES • 36" LMBV MODELS • INSTALLATION INSTRUCTIONS
TABLE OF CONTENTS
Introduction ......................................page 2
Massachusetts and New York
Requirements .........................page 3
General Information ..........................page 3
Location ............................................page 4
Appliance Specifications ...................page 5
Clearances ........................................page 5
Gas Vent Rule ...................................page 5
Fireplace Installation:
Typical Installation Sequence ......... page 6
Framing Specifications ...................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
Finishing Requirements ....................page 13
Cold Climate Insulation .....................page 13
Installation Accessories ....................page 13
Gas Conversion Kits ...................page 14
This installation manual will help you obtain a
safe, efficient, dependable installation for your
appliance and vent system.
Please read and understand these instruc-
tions before beginning your installation.
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, efficient operation.
The electronic appliances are designed to
operate on either natural or propane gas. An
electronic intermittent pilot system provides
safe, efficient operation. External electrical
power is required to operate these units.
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 edi-
tion), and CAN/CGA-2.17-M91 in both USA and
Canada, as vented gas fireplaces.
Installation must conform to local codes. In
the absence of local codes, installation must
comply with the current National Fuel Gas Code,
ANSI Z223.1 (NFPA 54). (In Canada, the current
CAN/CGA B149 installation code.) Electrical
wiring must comply with local codes. In the
absence of local codes, installation must be in
accordance with the National Electrical Code,
NFPA 70, latest edition. (In Canada, the current
CSA C22.1 Canadian Electric Code.)
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.
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 infor-
més des dangers que posent les températures
de surface élevées et se tenir à distance an
d’éviter des brûlures ou que leurs vêtements
ne s’enamment.
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.
WARNING
Young children should be care-
fully supervised when they are
in the same room as the appli-
ance. 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 replace 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 sur-
face chaude. Il est recommandé
d’installer une barrière physique
si des personnes à risques habi-
tent la maison. Pour empêcher
l’accès à un foyer ou à un poêle,
installez une barrière de sécu-
rité; 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.
WARNING
B-Vent appliances are not
designed to operate in negatively
pressured environments (pres-
sure within the home is less than
pressures outside). Signicant
negatively pressured environ-
ments caused by weather, home
design, or other devices may
impact the operation of these
appliances. Negative pres-
sures may result in poor ame
appearance, sooting, damage to
property and/or severe personal
injury. Do not operate these
appliances in negatively pres-
sured environments.
WARNING
Improper installation, adjust-
ment, 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.