Lennox Hearth Products MONTEBELLO LSM40MN-2 User manual

CARE AND OPERATION
INSTRUCTIONS
A French manual is available upon request. Order P/N 875,027CF
Ce manuel d’installation est disponible en francais, simplement en
faire la demande. Numéro de la pièce 875,027CF
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
MODELS
OTL Report No. 116-F-22-5
US
P/N 875,027M REV. E 08/2007
FOR YOUR SAFETY: Do not store or use gasoline
or other flammables or liquids in the vicinity of
this or any other appliance.
FOR YOUR SAFETY: What to do if you smell gas:
• DO NOT light any appliance.
• DO NOT touch any electrical switches.
• Do not use any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow your gas suppliers
instructions.
• If your gas supplier cannot be reached, call
the fire department.
Installation and service must be performed by
a qualified installer, service agency or the gas
supplier.
WARNING:IFTHEINFORMATIONINTHISMANUAL
IS NOT FOLLOWED EXACTLY, A FIRE OR EXPLO-
SIONMAYRESULTCAUSINGPROPERTYDAMAGE,
PERSONAL INJURY OR LOSS OF LIFE.
WARNINGS
• Hot! Do not touch! The glass and
surfaces of this appliance will be hot
during operation and will retain heat
forawhileaftershuttingofftheappli-
ance. Severe burns may result.
• Carefully supervise children in the
same room as appliance.
• If small children are present in the home, it is
recommended that this appliance be fitted with
a screen door or screen panel kit. See Page 11
for ordering information.
POUR VOTRE SÉCURITÉ: Ne pas entreposer ni
utiliser d'essence ni d'autre vapeurs ou liquides
inflammables dans le voisinage de cet appareil ou
de tout autre appareil.
POUR VOTRE SÉCURITÉ: Que faire si vous sentez
une odeur de gaz:
• Ne pas tenter d'allumer d'appareil.
• Ne touchez à aucun interrupteur. Ne pas vous
servir des téléphones se trouvant dans le bati-
ment où vous vous trouvez.
• Evacuez la piéce, le bâtiment ou la zone.
• 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 dos incendies.
L'installation et service doit être exécuté par un
qualifiéinstalleur,agencede serviceoule fournis-
seur de gaz.
AVERTISSEMENT: ASSUREZ-VOUS DE BIEN
SUIVRE LES INSTRUCTIONS DONNÉ DANS CETTE
NOTICE POUR RÉDUIRE AU MINIMUM LE RISQUE
D'INCENDIE OU POUR ÉVITER TOUT DOMMAGE
MATÉRIEL, TOUTE BLESSURE OU LA MORT.
VENTED GAS FIREPLACE - DIRECT VENT MODELS
Millivolt Models Electronic Models
LSM40MN-2 LSM40EN-2
LSM40MP-2 LSM45EN-2
LSM45MN-2
LSM45MP-2
DIRECT VENT
MONTEBELLO™
TM

2
AVERTISSEMENT
Ne pas se servir de cet appareil
s'il a été plongé dans l'eau,
complètement ou en partie.
Appeler un technicien qualifié
pourinspecterl'appareiletrem-
placertoutepartiedusystèmede
contrôle et toute commande qui
ont été plongés dans l'eau.
WARNING
Failuretocomplywiththeinstal-
lationandoperatinginstructions
provided in this document will
result in an improperly installed
andoperatingappliance,voiding
its warranty. Any change to this
appliance and/or its operating
controlsisdangerous. Improper
installation or use of this appli-
ance can cause serious injury or
deathfromfire,burns,explosion
or carbon monoxide poisoning.
WARNING
Do not use these appliances if
any part has been under water.
Immediately call a qualified,
professional service technician
to inspect the appliances and to
replace any parts of the control
system and any gas controls
which have been under water.
IMPORTANT
These appliances must not be
connected to a chimney or flue
serving a separate solid-fuel
burning appliance. WARNING
Do not attempt to alter or modify
theconstructionoftheappliance
or its components. Any modi-
fication or alteration may void
the warranty, certification and
listings of this unit.
WARNING
If the information in this
manual is not followed
exactly, a fire or explo-
sion may result caus-
ing property damage,
personal injury or loss
of life.
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.
SAFETY & WARNING
INFORMATION
WARNING
These fireplaces are vented
gas appliances. Do not burn
wood or other material in these
appliances.
WARNING
This appliance is onlyforuse with
the type of gas indicated on rating
plate. This appliance is not con-
vertible for use with other gases,
unless a certified kit is used.
WARNING
Do not place clothing or other
flammable materials on or near
this appliance.
WARNING
Carbon Monoxide Poisoning:
Early signs of carbon monoxide
poisoning are similar to the flu
with headaches, dizziness and/or
nausea. If you have these signs,
obtainfreshairimmediately.Turn
offthegassupplytotheappliance
andhaveitservicedbyaqualified
professional,asitmaynotbeoper-
ating correctly. Some people are
moreaffectedbycarbonmonoxide
than others. These include preg-
nant women, people with heart
or lung disease or anemia, those
undertheinfluenceofalcohol,and
those at high altitudes.
WARNING
Any safety guard or screen
removedforservicingtheappli-
ance must be replaced prior to
operating the appliance.
WARNING
Children and adults should be
alerted to the hazards of high
surface temperatures. Use
caution around the appliance
to avoid burns or clothing igni-
tion. Young children should be
carefully supervised when they
are in the same room as the
appliance. Note: An Optional
Screen Panel for the glass is
available (see Page11for order-
ing information).
AVERTISSEMENT
Cet appareil doit être utilisé
uniquement avec les types de
gaz indiqués sur la plaque sig-
nalétique. Nepas l'utiliser avec
d'autres gaz sauf si un kit de
conversion certifié est installé.
AVERTISSEMENT
Surveiller les enfants. Garder les
vêtements,lesmeubles,l'essence
ouautresliquidesà vapeurinflam-
mables à cote de l'appareil.
IMPORTANT: PLEASE READ THIS
MANUAL IN ITS ENTIRETY AND
UNDERSTAND THESE RULES TO
FOLLOW FOR SAFETY.
IMPORTANT
Theventterminationishotwhile
in operation and for a period of
time following the use of the
fireplace.Youngchildrenshould
be carefully supervised when
they are in the same area as at
hot termination.

3
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Millivolt Models with
Manually-Modulated Gas Valve
Natural Gas Propane Gas
Model
No.
Input
(BTU/Hr)
Model
No.
Input
(BTU/Hr)
LSM40-2 40,000 to
50,000 LSM40-2 40,000 to 50,000
LSM45-2 47,000 to
60,000 LSM45-2 48,000 to 60,000
Table 1
Electronic Models with
Manually-Modulated Gas Valve
Natural Gas Propane Gas
Model
No.
Input
(BTU/Hr)
Model
No.
Input
(BTU/Hr)
LSM40-2 40,000 to
50,000 LSM40-2 40,000 to 50,000
LSM45-2 47,000 to
60,000 LSM45-2 48,000 to 60,000
Table 2
Table 3 shows the gas orifice size required
for the elevations indicated.
Model Orifice Size Elevation
Feet (meters)
Nat. Prop.
LSM40-2 .1405"
(#28)
.086"
(#44) 0-4500
(0-1372)
LSM45-2 .161"
(#20)
.093"
(#42)
Table 3
Themillivoltappliancesaredesignedtooperate
on either natural or propane gas. A millivolt gas
controlvalvewithpiezoignitionsystemprovides
safe, efficient operation.
The electronic appliances are designed to oper-
ateonnaturalgasonly.Anelectronicintermittent
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 OMNI-
Test Laboratories (Report No. 116-F-22-5) to
ANSI Z21.50 (in Canada, CSA-2.22), and CAN/
CGA-2.17-M91 in both the USA and Canada as
vented gas fireplaces.
TheInstallation mustconformto localcodesor,
in the absence of local codes, with the National
Fuel Gas Code, ANSI Z223.1/NFPA 54 - latest
edition, or the Natural Gas and Propane Instal-
lation Code, CSA B149.1 - latest edition. The
appliance, when installed, must be electrically
grounded 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.
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'appareil.
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
belocatedoutoftrafficandawayfromfurniture
and draperies. Locate furniture and window
coverings accordingly.
These appliances are designed to operate on
natural gas or propane gas only.
Millivolt Models -
Input of millivolt models is shown in the fol-
lowing table:
TABLE OF CONTENTS
Safety and Warning Information ........Page 2
Introduction .......................................Page 3
General Information...........................Page 3
Operation/Care of Your Appliance ......Page 4
Variable Flame Adjustment.................Page 5
Maintenance.......................................Page 5
Maintenance Schedule.......................Page 6
Front Glass Enclosure Panel,
Removal and Installation.................Page 7
Burner Adjustments...........................Page 7
Flame Appearance and Sooting..........Page 7
Adjustment.........................................Page 7
Logs, Glowing Embers, Volcanic
Stone Placement.............................Page 8
Millivolt Appliance Checkout..............Page 9
Electronic Appliance Checkout...........Page 9
Accessory Components .....................Page 9
Wiring Diagrams................................Page12
Warranty ............................................Page12
Replacement Parts.............................Page12
Product Reference Information..........Page12
Lighting Instructions – Millivolt .........Page13
Lighting Instructions – Electronic ......Page15
Troubleshooting Guide – Millivolt.......Page17
Troubleshooting Guide – Electronic ...Page18
Replacement Parts List......................Page19
INTRODUCTION
Thefireplacemodelscoveredinthis manualare
Direct-Vent,sealedcombustiongasfireplaces
designed for residential application. Direct-
Vent appliances operate with the combustion
chamber completely isolated from the inside
atmosphere. All air for combustion is brought
in from the outside and exhaust gases are
vented through the same direct vent, vent
system.
Electronic Models -
Electronic models have a manually-modulated
gas valve. Input of electronic models is shown
in the following table:
CONGRATULATIONS ON THE PURCHASE OF YOUR NEW GAS APPLIANCE MANU-
FACTURED BY LENNOX HEARTH PRODUCTS.
When you purchased your new gas-fired fireplace, you joined the ranks of thousands of individuals
whoseanswer to their home heatingneedsreflects their concern for efficiencyandourenvironment.
We extend our continued support to help you achieve the maximum benefit and enjoyment available
from your new gas-fired fireplace. It is our goal at Lennox Hearth Products to provide you, our
valued customer, with an appliance that will ensure years of trouble-free warmth and pleasure.
Thank you for selecting a Lennox Hearth Products gas-fired fireplace as the answer to your home
supplemental heating needs.
Sincerely, All of us at Lennox Hearth Products

4NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Figure 2 - SIT Millivolt Gas Valve
H
I
LO
W
TPTH TP TH
P
I
L
O
T
P
I
L
O
T
O
N
it
O
F
F
Variable Flame
Height Adjustment
Manifold
Pressure Port
Inlet Pressure
Port
Main Gas
Control Knob
Pilot Adjustment
Screw
IN OUT
Refer to Figure 1 for access to the gas control
valve. Millivolt appliances will be fitted with the
gas control valve shown in Figure 2.
Applianceswithelectronicsystemswillbefitted
with the electronic valve shown in Figure 3.
Familiarize yourself with the gas control valve
that your appliance uses.
Millivolt Appliances -
To light millivolt appliances refer to the detailed
lightinginstructionsfoundonPage12.Millivolt
appliance lighting instructions may also be
foundonthepulloutlightinginstructionlabels
attached to the gas control valve.
Millivolt appliances are fitted with an ON/OFF
Rocker Switch for appliance ON/OFF control.
See Figure 1 for its location. Once the pilot is
lighted, the ON/OFF rocker switch will control
the appliance ON/OFF operation. To operate:
Toggle the switch between its ON and OFF
positions.
If your millivolt appliance is equipped with an
optional remote wall switch or remote control
kit and the pilot is lit, the appliance main burner
may be turned on and off with the wall switch
or remote control.
Electronic Appliances -
Tolightelectronicappliancesrefertothedetailed
lighting instructions found on Page 15 of these
instructionsrespectively. Electronicappliance
lighting instructions may also be found on the
pull out lighting instruction labels attached to
the gas control valve.
Electronic appliances are fitted with an ON/OFF
rockerswitchforapplianceON/OFFcontrol.See
Figure 1 for its location.
Once the pilot is lighted, the ON/OFF rocker
switchwill control theappliance ON/OFF opera-
tion. To operate: Toggle the switch between its
ON and OFF positions.
Maximum manifold pressure is 3.5 in. W.C.
(0.87 kPa) for natural gas and 10 in. W.C. (2.49
kPa) for LP/Propane gas.
Test gauge connections are provided on the
front of the millivolt and electronic gas control
valve (identified OUT for the manifold side and
IN for inlet pressure).
Minimuminletgaspressuretotheseappliances
is5.5incheswatercolumn(1.37kPa)fornatural
gas and 11 inches water column (2.74 kPa) for
propane for the purpose of input adjustment.
Maximum inlet gas supply pressure to these
appliances is 10.5 inches water column (2.61
kPa) for natural gas and 13.0 inches water
column (3.23 kPa) for propane.
The appliance must be isolated from the gas
supply piping system (by closing its individual
manual shut-off valve) during any pressure
testing of the gas supply piping system at
test pressures equal to or less than 1/2 psig
(3.5 kPa).
The appliance and its individual shut-off valve
must be disconnected from the gas supply
piping system during any pressure testing of
that system at pressures in excess of 1/2 psig
(3.5 kPa).
OPERATION AND CARE OF YOUR
APPLIANCE
Appliance operation may be controlled by the
following means: the factory provided ON/OFF
control switch, a remotely located optional wall
switchoroptionalremotecontrol. Themounted
ON/OFF control switch is located on the right
hand side of the appliance. See Figure 1.
Burn-in Period
During the first few fires of this appliance there
will be some odor due to the curing of the
paint and burning off of lubricants used in the
manufacturing process.
Depending on your use, the burn-in period may
take a few hours or a few days.
KEEP YOUR HOUSE WELL VENTILATED
DURING THE CURING PROCESS. THE ODOR
AND HAZE EMITTED DURING THE CURING
PROCESS CAN BE QUITE NOTICEABLE AND
MAY SET OFF A SMOKE DETECTOR. ENSURE
THAT A SMOKE DETECTOR IS NOT LOCATED
DIRECTLY ABOVE THE APPLIANCE OR TOO
CLOSETOTHIS APPLIANCE(FOLLOW SMOKE
DETECTOR MANUFACTURER'S INSTRUC-
TIONS FOR PROPER LOCATION).
A white film may develop on the glass front
during the first few fires as part of the curing
process. The glass should be kept clean during
thefirsttwoweeksofusetopreventthefilmfrom
baking on (making it very difficult to remove).
See Glass Cleaning on Page 5.
Figure 1
Control Compartment Access -
Millivolt Control Valve Shown
Piezo
Igniter
Gas Valve
ON/OFF Switch
Access Plate
Right Side
Modesty Panel
Hi-Lo
Extension Knob
Gas Controls / Control Compartment
Access
Thegas controls can be found onthe righthand
side of the appliance.
On millivolt systems, the piezo igniter, Hi/Lo
flame adjustment knob, and pilot and main gas
ON/OFF control knob are located on the right
side. On both millivolt and electronic systems
the gas valve is located on the right side of the
appliance. See Figure 1.
Operation of millivolt and electronic gas con-
trol systems are different. Before lighting and
operatingyourappliancedetermineif youhave
a millivolt or electronic appliance.

5
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Figure 3 - SIT Electronic Gas Valve
Always turn off gas to the pilot (millivolt ap-
pliances) before cleaning. Before re-lighting,
refer to the lighting instructions in this manual.
Instructions are also found on pull-out lighting
instruction labels attached to the gas valve.
Always keep the appliance area clear and free
fromcombustiblematerials,gasoline andother
flammable liquids.
Remember,Millivolt applianceshavea continu-
ous burning pilot flame. Exercise caution when
using products with combustible vapors.
Refer to the maintenance schedule for main-
tenance tasks, procedures, periodicity and
by whom they should be performed. Always
verify proper operation of the appliance after
servicing.
IMPORTANT: TURN OFF GAS AND ANY
ELECTRICAL POWER BEFORE SERVICING
THE APPLIANCE.
Glass Cleaning
(see Front Glass Enclosure Panel, Removal and
Installation on Page 7)
Note: Cleanglassafterfirsttwoweeksofopera-
tion (after Burn-In period is over) and then only
when necessary and when the fireplace is cool.
Wipe surface with clean, dampened, soft cloth.
Follow with dry, soft towel as desired. Take care
not to scratch the glass surface.
The viewing glass should be cleaned periodi-
cally to remove any build-up caused from the
following:
• During start-up, it is normal for condensa-
tion to form on the inside of the glass (this
condensation and fog will usually disappear
in a few minutes). The moisture can cause
lint,dustandotherairborneparticlestocling
to the glass surface.
Inlet Pressure
Gauge Port
Pilot
Adjustment
Screw
Hi-Lo Flame
Adjustment
Knob
Manifold
Pressure
Gauge Port
HI
LO
If your electronic appliance is equipped with an
optionalremotewallswitchorremotecontrolkit
theappliancemainburnermaybeturnedonand
off with the wall switch or remote control.
Variable Flame Height Adjustment
All appliances are equipped with a variable gas
control valve. Flame height for these models
may be adjusted through a range between
fixed low and high settings, alternately, while
the appliance is in operation.
Use the extension knob (refer to Figure 1), to
adjust the flame height as desired by sliding
the knob over the variable flame adjustment
knob located on the front of the valve (refer to
Figure 2). Replace the extension knob back
to the hanger after the adjustment.
MAINTENANCE
The appliance and venting system should be
thoroughly inspected before initial use and at
least annually by a qualified service technician.
However, more frequent periodic inspections
and cleaning should be performed by the hom-
eowner. Homeowner must contact a qualified
service technician at once if any abnormal
condition is observed.
Keep side control compartment clean by
vacuuming or brushing at least twice a year.
More frequent cleaning may be required due to
excessivelintfromcarpeting,beddingmaterials,
etc. It is important that control compartments,
burners and circulating air passageways of the
appliance be kept clean.
WARNING
Do not use abrasive cleaners.
Never clean the glass when it
is hot.
CAUTION
Do not attempt to touch the front
enclosure glass with your hands
while the fireplace is in use.
• Initial curing of the high temperature paint
and burning off of lubricants used in the
manufacturing process may result in a film
on the glass.
• A white coating may form on the glass as a
result of impurities and minerals in the fuel.
It is recommended that the glass be cleaned
two or three times during each heating season,
depending on the circumstances present. The
following cleaning solutions are approved for use
to clean glass:
• Non-ammonia based household cleaner
• 50%-50% mix of white vinegar & water
• Gas fireplace/stove glass cleaner
Inspect Glass Gasket - Visually inspect the
gasket on the backside of the glass enclosure
panels. The gasket surface must be clean, free
of irregularities and seated firmly.