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.

6
MAINTENANCE TASK ACCOMPLISHING PERSON PROCEDURE
Inspecting/Cleaning Burner, Logs
and Controls
Qualified Service Technician Inspect valve and ensure it is properly operating. Check piping for leaks.
Vacuum the control compartment, fireplace logs and burner area.
Check Flame Patterns and Flame
Height
Qualified Service Technician Refer to Figure 6 (LSM40-2) or Figure 7 (LSM45-2) on Page 8 and
verify the flame pattern and height displayed by the appliance conforms
to the picture. Flames must not impinge on the logs. Ensure flames
are steady (not lifting or floating).
Inspecting/Cleaning Pilot and Burner Qualified Service Technician Refer to Figure 8 (Millivolt) or Figure 9 (Electronic) on Page 9. Remove
any surface build-up on pilot and burner assembly. Wipe the pilot
nozzles, igniter/flame rod and hood. Ensure the pilot flame engulfs the
flame sensor as shown.
Checking Vent System Qualified Service Technician Inspect the vent system at the top and at the base (within the firebox)
for signs of blockage or obstruction. Look for any signs of dislocation
or deterioration of the vent components. Note: Excessive condensation
cancause corrosion of caps, pipe & fittings (excessive condensationcan
be caused by long lateral runs, too many elbows and/or exterior portions
of the system being exposed to cold weather). Also inspect wall straps
or plumbers's tape to ensure it is secure and in place.
Appliance Checkout Qualified Service Technician Perform the appropriate appliance checkout procedure detailed in this
manual.
Replacing Rockwool Ember Materials Homeowner/Qualified Service
Technician
Remove old ember materials (rockwool) and vacuum the ember place-
ment area. Place new embers as described in the Ceramic Panel And
Log Placement Guide accompanying this document and as shown in
Figures 6 and 7.
Periodically (After the Burning Season)
MAINTENANCE TASK ACCOMPLISHING PERSON PROCEDURE
Cleaning Firebox Interior Homeowner Carefullyremovelogs,rockwool,volcanicstoneandvermiculite. Vacuum
outinteriorofthefirebox. Cleanfireboxwallsandloggrate. Replacelogs,
rockwool, vermiculite and volcanic stone as detailed in this manual.
Check Flame Patterns and Flame
Height
Homeowner Refer to Refer to Figure 6 (LSM40-2) or Figure 7 (LSM45-2) on Page
8and verify the flame pattern and height displayed by the appliance
conforms to the picture. Flames must not impinge on the logs.
Checking Vent System Homeowner Inspect the vent system at the top and at the base (within the firebox)
for signs of blockage or obstruction. Look for any signs of dislocation
of the vent components.
Cleaning Front Glass Enclosure Panel Homeowner Clean as necessary following the directions provided in this manual. DO
NOT TOUCH OR ATTEMPT TO CLEAN GLASS WHILE HOT.
Annually (Before the onset of the Burning Season)
MAINTENANCE SCHEDULE

7
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Front Glass Enclosure Panel, Removal
and Installation
These are direct-vent appliances. They are
designed to operate only when the front glass
enclosure panel is installed. Generally the front
glass enclosure panel should not be removed
except to gain access to the components within
the firebox.
Refer to Figure 4 and remove the front glass
door assembly as follows:
To remove the firescreens, lift up the center of
the rod to disengage it from the center bracket,
bend down at center, hold left side with hand
until it disengages from left side, being careful
not to scratch paint. Slowly remove the rod
from the right side.
Remove the door modesty shield from the top
flangeglassdoorbypullingitupfirmlywithboth
hands until it is disengaged. Using a phillips
screwdriver, unfasten two (2) screws located
at the top of the glass frame.
ENSURE THAT THE FRONT GLASS DOOR
ASSEMBLY IS IN PLACE AND SEALED AFTER
ADJUSTMENT.
Adjustment
To adjust the flame, move the adjustment air
shutter (located on the lower venturi) back or
forward to increase or reduce the air shutter
opening, respectively. Position the air shutter
to the factory setting as shown in Figure 5 on
Page 8.Allow the burner to operate for at least
15minutes.Observetheflamecontinuously.Ifit
appearsweak or sooty as previously described,
adjustthe air shutter until the flame appearance
is as desired.
Propane models may exhibit a flame pattern
that may candle or appear stringy. If this is
problematic or persists as the appliance is
continually operated, adjust the air shutter
closedasdescribedinthepreviousparagraphs.
Operatethe appliance for a period of time asthe
effect diminishes, ensuring that the appliance
does not develop sooty flames.
Figure 4
Glass Door Latch (2)
Glass Door Assembly
Firebox Floor
Top Flange Glass Door
Frame Assembly
Screws
Tilt the glass frame at the top away from the
unit. Lift it carefully off the bottom door track
and set the door aside, protecting it from
inadvertent damage.
To install the front glass door assembly,
proceed as follows:
1. Retrieve the glass door assembly. Visually
inspect the gasket on the backside of the
panel. The gasket surface must be clean,
free of irregularities and seated firmly.
2. Positionthedoorframeinfrontofthefirebox
opening and engage the bottom flange over
the rail at the bottom of the firebox open-
ing.
3. Swing the door up and back. Ensure the
gasket seats evenly as the door draws shut.
Engage the nut insert and fasten with two
screws to secure the door.
4. Installthe doormodesty shieldontop flange
glassdoorasfollows: grabthedoormodesty
shield with both hands, with the open hem
going down and engage it with the upper lip
of the glass door frame by pushing it all the
way down. Make sure the installed shield is
firmly in place.
5. With the firescreen hanging on the screen
rod, drop in the right side of the rod to the
right modesty panel. Then drop in the left
side of the rod through the slot of the left
modesty panel. Make sure that the rod is
supported by the bracket in the center of the
fireplace.
Burner Adjustments
The following paragraphs address burner
adjustment concerns and procedures.
Whenlitforthefirsttime,thisappliancewillemit
a slight odor for an hour or two. This is due to
the “burn-in” of internal paints and lubricants
used in the manufacturing process.
Flame Appearance and Sooting
(see Figures 6 and 7 on Page 8)
Appliances operated with air shutter openings
that are too large will exhibit flames that are blue
andtransparent.Theseweak,blueandtranspar-
ent flames are termed anemic. If the air shutter
opening is too small sooting may develop.
Sooting is indicated by black puffs developing
at the tips of very long orange flames. Sooting
results in black deposits forming on the logs,
appliance inside surfaces and on exterior sur-
faces adjacent to the vent termination.
Sootingis caused byincomplete combustion in
the flames and a lack of combustion air enter-
ing the air shutter opening. To achieve a warm
yellow to orange flame with an orange body
that does not soot, the shutter opening must
be adjusted between these two extremes. No
smokeorsootshouldbepresent.Repositionthe
logs if the flames impinge on any of them.
If the logs are properly positioned and sooting
conditions exist, the air shutter opening on the
main burner tube should be adjusted. Normally,
themoreoffsetsintheventsystem,thegreaterthe
need for the air shutter to be opened further.
WARNING
Donotoperateappliancewiththe
glass front removed, cracked or
broken.Replacementoftheglass
should be done by a licensed or
qualified service technician.
WARNING
Handle this glass with extreme
care! Glass is susceptible to
damage – Do not scratch or
handleroughlywhilereinstalling
the glass door frame.
WARNING
Air shutter adjustment should
only be performed by a qualified
professional service techni-
cian.
WARNING
Whenreinstallingtheglassdoor,
the door latch screws must be
securely tightened to prevent
the glass door from falling out,
which could potentially cause
damage and possible injury.
WARNING
Do not attempt to substitute the
materials used on this door, or
replace cracked or broken glass
with any materials other than
those provided by the appliance
manufacturer.
WARNING
The glass door of this appli-
ance must only be replaced as
a complete unit as provided by
themanufacturer. Donotattempt
to replace broken, cracked or
chipped glass separately.

8NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Log Placement
Carefullypositiontheceramicfiberlogsand twigsovertheburneras showninFigure 6 (LSM40-2)
or Figure 7 (LSM45-2) on this Page. Refer to the detailed log placement instructions provided
in the CERAMIC PANEL AND LOG PLACEMENT GUIDE accompanying this document.
Proper twig placement is critical to prevent sooting. Twigs should be placed in the gaps between
the flame peaks and should be positioned so that at no time they impinge the flames. Placement
is the same for all colors and styles of logs.
Figure 6 (Birch Logs Shown) LSM40-2
Air Shutter
Opening
Burner
Orifice
Gas
Valve
Venturi
Venturi
Figure 5
When satisfied that the appliance operates
properly,proceedtofinishtheinstallation.Leave
the control knob in “ON” position and turn the
remote switch “OFF.”
Figure 7 (Rustic Oak Logs Shown) LSM45-2
WARNING
The size and position of the log set was engineered to give your appli-
ance a safe, reliable and attractive flame pattern. Any attempt to use
a different in the fireplace will void the Warranty and will result in
incomplete combustion, sooting, and poor flame quality.
WARNING
This appliance is not meant
to burn wood. Any attempt to
do so could cause irreparable
damage to your appliance and
prove hazardous to your safety.
WARNING
Logsgetveryhotandwillremain
hot up to one hour after gas
supply is turned off. Handle
only when logs are cool. Turn
offallelectricitytotheappliance
beforeyouinstallgrateandlogs,
If applicable.
Main Burner Factory Air Shutter
Opening Setting - Inches (millimeter)
Model Nat.Gas Propane Gas
LSM40-2
1/16 (1.59) 9/32 (7.14)
LSM45-2
1/16 (1.59) 9/32 (7.14)

9
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Electronic Appliance Checkout
To light the burner, refer to the lighting instruc-
tions on Page 15. Ensure the igniter lights the
pilot. The pilot flame should engulf the flame
sensor as shown in Figure 9.
With proper care and maintenance, your appli-
ance will provide many years of enjoyment. If
you should experience any problem, first refer
to the trouble shooting guide in this manual. If
problem persists, contact your Lennox Hearth
Products distributor.
ACCESSORY COMPONENTS
Standard Remote Control System
The Model RCL (Standard) Remote Control
System, features a simple On/Off control func-
tion for the fireplace. This model includes a
hand-held transmitter, a remote receiver with
wall-mountcoverplateandallhardwarerequired
to install the unit. The remote receiver can be
wall or hearth mounted.
Glowing Embers (Rockwool) Placement
Refertothedetailedglowingembersplacement
instructions provided in the CERAMIC PANEL
AND LOG PLACEMENT GUIDE accompanying
this document.
Ceramic Panel Placement
Refer to the detailed ceramic panel placement
instructions provided in the CERAMIC PANEL
AND LOG PLACEMENT GUIDE accompanying
this document.
Millivolt Appliance Checkout
The pilot flame should be steady, not lifting
or floating. Flame should be blue in color with
traces of orange at the outer edge.
The top 3/8" (10 mm) at the pilot generator
(thermopile) and the top 1/8" minimum (tip)
of the quick drop out thermocouple should be
engulfed in the pilot flame. The flame should
project 1" (25 mm) beyond the hood at all three
ports. See Figure 8.
To light the burner, refer to the lighting instruc-
tions on Page 13.
Remote Control System (Standard) H0249 RCL
Deluxe Remote Control System
The Model RCL-T (Deluxe) Remote Control
System has all of the features of the standard
system along with an added easy to read LCD
screenwhichpresentsaccesstomanyenhance-
ments, including; battery power level indicator,
timer, mode of operation, thermostatic display
including room temperature in either metric
of English units, flame indicator and clock.
Fully programmable, the Model RCL-T allows
for command over nearly all operational and
temperature variables, using the hand held
remote control transmitter.
Remote Control System (Deluxe) H0251 RCL-T
Flame Modulating Remote Control
FlameModulatingRemoteControlsweredevel-
opedtoprovideasafe,reliableanduser-friendly
remotecontrol system for appliances equipped
with a Millivolt Gas Valve. A detailed set of
instructions are included with each remote.
Flame Modulating Remote Control
– Natural Gas H0301 RCL-MN
Flame Modulating Remote Control
– LP/Propane Gas H0302 RCL-ML
89L36 WTK Wall Thermostat Kit
Wall Thermostat
The wall thermostat kit provides temperature
control for optimum comfort.
    

  

Figure 9
Pilot
Nozzels
ELECTRONIC PILOT ASSEMBLY
Proper Pilot Flame Appearance
Flame
Sensor
Pilot Hood Igniter
Rod
Figure 8
Thermocouple
Thermopile
Pilot
Nozzels
SIT MILLIVOLT PILOT ASSEMBLY
Igniter Rod
Pilot Hood
Proper Pilot Flame Appearance
3/8" Min.
(9 mm)

10 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
ACCESSORY COMPONENTS CONTINUED Brick Liner Kits
Thebrickpanellinerkitsincludeceramicpanels
of the side and rear walls. The panels have
brick-like features in relief.
Brick Liner Kits
LSM40-2
H2219 BLKR-LSM40 Buff Rustic
H4801 BLK-REDR-LSM40 Red Rustic
H2220 BLKH-LSM40 Buff Herringbone
H4803 BLK-REDH-LSM40 Red Herringbone
H2221 BLKC-LSM40 Red Old Cottage
H2222 BLKB-LSM40 Black
LSM45-2
H2223 BLKR-LSM45 Buff Rustic
H2224 BLKH-LSM45 Buff Herringbone
H2225 BLKC-LSM45 Red Old Cottage
H2226 BLKB-LSM45 Black
H4802 BLK-REDR-LSM45 Red Rustic
H4804 BLK-REDH-LSM45 Red Herringbone
Bag of Glowing Embers
Bag of Volcanic Stone
Bag of Vermiculite
Replacement ember material, volcanic stone
and vermiculite are available for use with these
appliances. Order them to replace materials
as part of the periodic maintenance of the
appliance.
ON/OFF Wall Switch Kit
The ON/OFF wall switch kit may be used to
controltheoperationofthefireplaceburnerasan
alternative to the unit mounted ON/OFF switch.
Install the ON/OFF wall switch in a convenient
location near the fireplace.
ON/OFF Wall Switch Kit
Cat. No. Model Description
85L87 FWSK Wall Switch
Firebox Accessories
Cat. No. Model Description
88L53 FGE Bag of Glowing Embers
80L42 FDVS Bag of Volcanic Stone
H3696 Bag of Vermiculite
Birch Logs
Rustic Oak
Log Sets
Choose from two finely crafted log sets with
detailing that replicates the natural look of
real wood.
Log Sets
Cat. No. Model Description
LSM40-2 and LSM45-2
H4799 LOG-OAK-LSM-2 Oak Log Set
H4800 LOG-BIR-LSM-2 Birch Log Set