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NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX MERIT
®
SERIES B-VENT GAS FIREPLACES • 42" LMBV MODELS • CARE AND OPERATION INSTRUCTIONS
Gas Orifice
Type Size Elevation
0 - 4500'
(0 - 1370 m)
0 - 4500'
(0 - 1370 m)
Natural
Propane
(0.065)
#37
(0.104)
TABLE OF CONTENTS
Introduction ......................................page 2
General Information ..........................page 2
Operation/Care of Your Appliance .....page 3
Damper & Outside Air Controls .........page 4
Manual Limit Switch .........................page 5
Attaching "Safety-in-Operation"
Warnings ............................ page 6
Maintenance ......................................page 7
Millivolt Appliance Checkout .............page 7
Electronic Appliance Checkout ..........page 7
Maintenance Schedule ......................page 8
Log and Rockwool Placement ...........page 9
Wiring Diagrams ...............................page 10
Lighting Instructions – Millivolt ........page 11
Lighting Instructions – Electronic .....page 13
Troubleshooting Guide – Millivolt......page 15
Troubleshooting Guide – Electronic ..page 16
Warranty ...........................................page 17
Product Reference Information .........page 17
Replacement Parts ............................page 17
Accessory Components ....................page 18
Replacement Parts List .....................page 19
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.
Input of appliance is 30,000 BTU/HR.
CONGRATULATIONS!
In selecting this LENNOX B-vented gas appliance, you have chosen one of the finest
and most dependable fireplaces available. This gas fireplaces is a beautiful, prestigious
alternative to a wood burning fireplace. Welcome to a family of tens of thousands of
satisfied LENNOX fireplace owners.
Please read and carefully follow all of the instructions found in this manual. Please
pay special attention to the safety instructions provided in this manual. The Care and
Operation Instructions included herein will help to ensure many years of dependable and
enjoyable service from your LENNOX product.
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 ignition system provides
safe, efficient operation. External electrical
power is required to operate these units.
GENERAL INFORMATION
Note: Installation and repair should be per-
formed by a qualified service person. The
appliance should be inspected annually by a
qualified professional service technician. More
frequent inspections and cleanings may be
required due to excessive lint from carpeting,
bedding material, etc. It is imperative that the
control compartment, burners and circulating air
passage ways of the appliance be kept clean.
S'assurer que le brùleur et le compartiment des
commandes sont propres. Voir les instructions
d'installation et d'utilisation qui accompagnent
l'apareil.
Provide adequate clearances around air open-
ings and adequate accessibility clearance for
service and proper operation. Never obstruct
the front openings of the appliance.
Due to high temperatures the appliance should
be located out of traffic and away from furniture
and draperies. Locate furniture and window
coverings accordingly.
Nominal operating pressures for the manifold
side of the gas control system are; 3.5 inches
water column (0.87 kPa) for natural gas models
and 10 inches water column (2.49 kPa) for
propane gas models.
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.
WARNING: THESE FIREPLACES ARE
VENTED DECORATIVE GAS APPLIANCES.
DO NOT BURN WOOD OR OTHER MATE-
RIAL IN THESE APPLIANCES.
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: ELECTRONIC MODELS OF
THESE APPLIANCES ARE EQUIPPED
WITH A THREE-PRONG (GROUNDING)
PLUG UTILIZED IN CONNECTING THE
ELECTRONIC COMPONENTS TO THE
JUNCTION BOX IN THE LOWER COM-
PARTMENT. THIS GROUNDING PLUG
PROVIDES PROTECTION AGAINST
SHOCK HAZARD AND SHOULD BE
PLUGGED DIRECTLY INTO THE PROP-
ERLY GROUNDED THREE-PRONG RECEP-
TACLE. DO NOT CUT OR REMOVE THE
GROUNDING PRONG FROM THE PLUG.