Page 1
HOMEOWNER'S CARE AND
OPERATION INSTRUCTIONS
DIRECT VENT MERIT®
LMDV-33/35/40 SERIES
DIRECT-VENT GAS FIREPLACE HEATERS
P/N 875,028M REV. C 06/2005
MODELS
Millivolt Models Electronic Models
LMDVT-3328CNM
LMDVT-3328CPM
LMDVR-3328CNM
LMDVR-3328CPM
LMDV-3530CNM
LMDV-3530CPM
LMDV-4035CNM
LMDV-4035CPM
LMDVT-3328CNE
LMDVR-3328CNE
LMDV-3530CNE
LMDV-4035CNE
LMDV-3530 MODEL SHOWN
WARNING: IF THE INFORMATION IN THIS MANUAL
IS NOT FOLLOWED EXACTLY, A FIRE OR EXPLOSION MAY RESULT CAUSING PROPERTY DAMAGE,
PERSONAL INJURY OR LOSS OF LIFE.
FOR YOUR SAFETY: Do not store or use gasoline
or other fl ammables 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 fi re department.
Installation and service must be performed by
a qualifi ed installer, service agency or the gas
supplier.
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
A French manual is available upon request. Order P/N 875,028CF
Ce manuel d’installation est disponible en francais, simplement en
faire la demande. Numéro de la pièce 875,028CF
Listing Agency
OTL Report No. 116-F-31-5
Page 2
CONGRATULATIONS!
In selecting this LENNOX Direct-Vent Gas Appliance you have chosen the fi nest and most
dependable fi replace to be found anywhere. Its a beautiful, prestigious alternative to a
wood burning fi replace. Welcome to a Family of tens of thousands of satisfi ed LENNOX
Fireplace Owners.
Please carefully read and follow all of the instructions found in this manual. Please pay
special attention to the safety instructions provided in this manual. The Homeowner's
Care and Operation Instructions included here will assure that you have many years of
dependable and enjoyable service from your LENNOX product.
TABLE OF CONTENTS
Introduction ......................................Page 2
General Information ..........................Page 2
Gas Controls Access .........................Page 4
Operation / Care of Your Appliance ...Page 4
Variable Flame Adjustment ................Page 5
Maintenance ......................................Page 5
Front Glass Enclosure Panel,
Removal and Installation .................Page 7
Install Vermiculite, Volcanic Stone,
Embers & Logs .................................Page 9
Burner Flame Appearance & Sooting Page 11
Burner Flame Adjustments ................Page 12
Millivolt Appliance Checkout .............Page 12
Electronic Appliance Checkout ..........Page 12
Wiring Diagrams ...............................Page 13
Warranty ...........................................Page 13
Product Reference Information .........Page 13
Accessory Components ....................Page 14
Lighting Instructions – Millivolt ........Page 17
Lighting Instructions – Electronic .....Page 18
Maintenance Schedule ......................Page 19
Troubleshooting Guide – Millivolt .....Page 20
Troubleshooting Guide – Electronic ..Page 20
Replacement Parts List .....................Page 22
These appliances comply with National Safety
Standards and are tested and listed by OmniTest Laboratories (Report No. 116-F-31-5) to
ANSI ZZ21.88b-2003 (in Canada, CSA-2.33b-
2003), and CAN/CGA-2.17-M91 in both USA and
Canada, as vented gas fi replace heaters.
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, or the Natural Gas and
Propane Installation 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,
the latest edition of the National Electrical Code,
ANSI/NFPA 70, or the Canadian Electrical Code,
CSA C22.1 - latest editions.
GENERAL INFORMATION
Note: Installation and repair should be performed by a qualifi ed service person. The
appliance should be inspected annually by a
qualifi ed professional service technician. More
frequent inspections and cleanings may be
required due to excessive lint from carpeting,
bedding material, etc.
IMPORTANT
It is imperative that the control
compartment, burners and circu-
INTRODUCTION
The Fireplace models covered in this manual
are Direct-Vent sealed combustion gas fi replace
heaters designed for residential application.
Direct-Vent appliances operate with the combustion chamber completely isolated from the
indoor environment. All air for combustion is
brought in from the outside and exhaust gases
are vented through the same direct vent, co-axial
(intake/exhaust) vent system.
The Millivolt appliances have a millivolt gas
control valve with piezo ignition system provides
safe, effi cient operation. If any optional accessories which require electrical power are being
installed, the electrical power must be provided
at the time of appliance installation.
The Electronic appliances have an electronic
intermittent pilot system provides safe, effi cient
operation. External electrical power is required
to operate these appliances.
2
lating air passage ways of appliance be kept clean. See Maintenance instructions on Page 6.
Provide adequate clearances around air openings 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 traffi c and away from furniture
and draperies. Locate furniture and window
coverings accordingly.
These fi replaces are designed as supplemental heaters. Therefore, it is advisable to have
an alternate heat source when installed in a
dwelling.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
These appliances are designed to operate on natural
gas or propane gas only. The use of other fuels or
combination of fuels will degrade the performance
of this system and may be dangerous.
Millivolt Models - BTU Input
Millivolt models come standard with the manually-modulated gas valve; fl ame appearance and
heat output can be controlled at the gas valve.
The BTU Input for millivolt models is shown in
Tables 1 & 2:
Input (BTU) Manually-Modulated Gas
Valves (millivolt models)
NATURAL GAS
Models Input Rate
(BTU / HR)
LMDVT-3328CNM
LMDVR-3328CNM
LMDV-3530CNM
LMDV-4035CNM
17,500 high
11,700 low
20,000 high
12,800 low
27,000 high
18,500 low
Table 1
Input (BTU) Manually-Modulated Gas
Valves (millivolt models)
PROPANE GAS
Models Input Rate
(BTU / HR)
LMDVT-3328CPM
LMDVR-3328CPM
LMDV-3530CPM
LMDV-4035CPM
17,500 high
14,000 low
20,000 high
15,200 low
27,000 high
21,500 low
Table 2
Electronic Models -
Electronic models have a fi xed rate gas valve.
The BTU Input for electronic models is shown
in Table 3:
Input (BTU) - Fixed Rate
(electronic models)
NATURAL GAS & PROPANE GAS
Models Input Rate
(BTU / HR)
LMDVT-3328CNE
LMDVR-3328CNE
LMDV-3530CNE 20,000
LMDV-4035CNM
LMDV-4035CPM
17,500
28,000
Table 3
Page 3
Gas Pressure -
Tables 4, 5 and 6 show the appliances' gas
pressure requirements.
Inlet Gas Supply Pressure
(all models)
Fuel # Minimum Maximum
Natural Gas
Propane
5.0" WC
(1.24 kPa)
11.0" WC
(2.74 kPa)
10.5" WC
(2.61 kPa)
13.0" WC
(3.23 kPa)
Table 4
Manifold Gas Supply Pressure
(millivolt models)
Fuel # Low High
Natural
Gas
Propane
(Lo) 2.2" WC
(.55 kPa)
(Lo) 6.3" WC
(1.57 kPa)
(Hi) 3.5" WC
(.87 kPa)
(Hi) 10.0" WC
(2.49 kPa)
Table 5
Manifold Gas Supply Pressure
(electronic models)
Fuel # Fixed
Natural Gas
Propane
3.5" WC
(.87 kPa)
10.0" WC
(2.49 kPa)
Table 6
Test gauge connections are provided on the
front of the millivolt gas control valve, identifi ed
IN for the inlet and OUT for the manifold side
(see Figures 4 or 5 on Page 5 ). A 1/8" NPT
Test gauge connection is provided at the inlet
and outlet (manifold) ports on the electronic gas
control valve (see Figure 3 on Page 5 ).
These appliances must be isolated from the
gas supply piping system (by closing their
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).
These appliances and their individual shut-off
valves must be disconnected from the gas
supply piping system during any pressure
testing of that system at pressures greater
than 1/2 psig (3.5 kPa).
Orifi ce Sizes - Sea Level to High Altitude
(All Models): These appliances are tested and
approved for installations at elevations of 0-4500
feet (0-1372 meters) above sea level using the
standard burner orifice sizes (marked with an
"*" in Table 7 ).
At the time of installation, it must be determined
if the appliance needs to be derated. Contact
your local gas supplier for deration requirements
for your area.
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 or by changing the burner orifi ce 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 CAN1-B149.1 and .2
codes - latest edition.
Burner Orifi ce Sizes
Elevation 0-4500 feet ( 0-1372 meters)
Model
Series
LMDVT-3328
LMDVR-3328
LMDV-3530
LMDV-4035
* Standard size installed at factory
• Part /Cat. Number
Natural
Gas
drill size
(inches)
#45 (.082")
39L6601 •
#44 (.086")
60J8001 •
#37 (.104")
24M1001 •
*
*
*
Propane
Gas
drill size (inches)
(.048")
*
99K78 •
#55 (.052")
1/16" (.0625")
19L5201 •
21L0101 •
*
*
Table 7
Burn-in Period
During the fi rst few fi res 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.
If an optional blower is installed, Do not turn it
on during the Burn-In period.
A white fi lm may develop on the glass front
during the fi rst few fi res as part of the curing
process. The glass should be kept clean during
the fi rst two weeks of use to prevent the fi lm from
baking on (making it very diffi cult to remove).
See Cleaning Glass on Page 6.
WARNING
If the information in this
manual is not followed
exactly, a fi re or explosion
may result causing property damage, personal
injury or loss of life.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
WARNING
Failure to comply with the installation and operating instructions
provided in this document will
result in an improperly installed
and operating appliance, voiding
its warranty. Any change to this
appliance and/or its operating
controls is dangerous. Improper
installation or use of this appliance can cause serious injury or
death from fi re, burns, explosion
or carbon monoxide poisoning.
IMPORTANT
These appliances must not be
connected to a chimney or fl ue
serving a separate solid fuel
burning appliance.
WARNING
Do not use these appliances if
any part has been under water.
Immediately call a qualifi ed,
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.
WARNING
Do not attempt to alter or modify
the construction of the appliance or its components. Any
modifi cation or alteration may
void the warranty, certifi cation
and listings of this unit.
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 qualifi ed installer, service
agency or the gas supplier.
3
Page 4
WARNING
These fireplaces are vented
heaters. Do not burn wood or
other material in these appliances.
WARNING
This appliance is only for use
with the type of gas indicated on
the rating plate. This appliance
is not convertible for use with
other gases, unless a certifi ed
kit is used.
WARNING
Do not place clothing or other
fl ammable materials on or near
this appliance.
WARNING
Carbon monoxide poisoning:
early signs of carbon monoxide
poisoning are similar to the fl u
with headaches, dizziness and/or
nausea. If you have these signs,
obtain fresh air immediately. Turn
off the gas supply to the appliance
and have it serviced by a qualifi ed professional, as it may not
be operating correctly.
WARNING
Children and adults should be
alerted to the hazards of high
surface temperatures. Use caution around the appliance to
avoid burns or clothing ignition.
Young children should be carefully
supervised when they are in the
same room as the appliance.
Note: An Optional Screen Heat
Guard for the glass is available
(see Page 16 for ordering information).
WARNING
Any safety guard or screen
removed for servicing the appliance must be replaced prior to
operating the appliance.
Gas Controls/Control Compartment
Access
The gas controls can be found behind the control
compartment access door.
Removing Control Compartment Door:
Open the door by gently liftint it upward until the
hook catches on boths sides clear the locating
slots. Then pull door out to remove.
On millivolt systems, the piezo igniter, HI/LO
fl ame adjustment knob, and pilot and main
gas OFF/ON control knob are located below
the glass panel enclosure. The gas valve for
electronic systems is also located below the
glass enclosure panel. See Figure 1.
Reinstalling Control Compartment Door:
To reinstall, insert the hook catches on each
side of the door into the corresponding slots
in the control compartment opening, then
gently push forward and slide down until it
locks in place.
Lift the Lower Control
OPENING CONTROL
COMPARTMENT DOOR
Control Valve
Figure 1
OPERATION AND CARE OF YOUR
APPLIANCE
The standard controls for appliance operation
are located behind the hinged drop-down panel
below the appliance front glass enclosure panel
(see Figure 1). Optional control switches are
also available (see Page 14 - Remote Wall
Switch, Remote Control or Wall Thermostat).
Compartment Door
up and pull out to
remove.
Hook Catch
Out
Up
Lower Control
Compartment Door
Operation of millivolt and electronic gas control systems are different. Before lighting and
operating your appliance determine if you have
a millivolt or electronic appliance. Familiarize
yourself with the gas control valve that your
appliance uses. Refer to Figure 1 for access
to the gas control valve.
Millivolt Appliances - Appliances with
Millivolt systems will be fi tted with the gas
control valve shown in Figures 4 or 5.
Electronic Appliances - Appliances with
electronic systems will be fi tted with the
electronic valve shown in Figure 3.
Millivolt Appliances - To light millivolt appliances refer to the detailed lighting instructions
found on Page 17 . Millivolt appliance lighting
instructions may also be found on the pull out
lighting instruction labels attached to the gas
control valve.
Millivolt appliances are fi tted with an OFF/ON
Rocker Switch located behind the control
compartment access door, below the appliance front glass enclosure panel (see Figure 2
for location). Once the pilot is lit, the OFF/ON
rocker switch will control the appliance OFF/ON
burner operation. To operate: Toggle the switch
between its ON and OFF positions.
If your millivolt appliance is equipped with an
optional remote switch kit (wall switch, remote
control or wall thermostat) and the pilot is lit,
the appliance main burner may be turned on
and off using the optional switch. When using
an optional remote switch, turn off the standard
OFF/ON switch.
Note: To prevent excessive resistance in burner
circuit (which can cause burner operation problems), only one burner control switch should be
wired to valve. Therefore, if an optional control
switch is installed, the standard Off/On switch
and wires should be removed.
SIT Gas Valve
Shown with control
compartment door
removed
Piezo Igniter
Sit and Honeywell Millivolt Gas Valve
Showing Piezo Igniter Location (Each Unit is
Equipped with Only One of these Gas Valves)
Figure 2
Honeywell
Gas Valve
4
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Page 5
Electronic Appliances -
To light electronic appliances refer to the
detailed lighting instructions found on Page
18 of these instructions. Electronic appliance
lighting instructions may also be found on the
pull out lighting instruction labels attached to
the gas control valve.
Honeywell Electronic Gas Valve
Manifold Pressure
Port
I
G
N
I
T
ER
Figure 3
HI/LO Variable
Flame Height
Adjustment
T
P
T
H
T
P
T
H
OFF
Optional Burner OFF/ON
Rocker Switch
Figure 4
Manifold Pressure
Tap
ON / OFF Switch
C
O
N
T
R
NO
O
FFO
L
Electronic Gas
Control Valve
Manifold Pressure Tap
I
H
L
W
O
Pilot Adjustment
P
I
L
O
Screw
T
ON
Piezo Igniter
Piezo Igniter
Inlet
Pressure
Port
NI
PSI
Inlet Pressure Tap
IN
OUT
F
F
O
P
I
L
O
ti
T
O
N
ON
OFF
Optional Blower OFF/ON
Rocker Switch
Inlet Pressure Tap
If your electronic appliance is equipped with an
optional remote wall switch or remote control kit
the appliance main burner may be turned on and
off with the wall switch or remote control.
If your electronic appliance is not equipped
with a wall switch or remote control, the main
burner must be turned off and on with the gas
control switch. Toggle the switch from ON to
OFF to operate the main burner .
Variable Flame Height Adjustment
(Millivolt Appliances only)
1. All Millivolt appliances are equipped with a
variable gas control valve. Flame height for
these models may be adjusted through a
range between fi xed low and high settings
while the appliance is in operation. Adjust
the fl ame height as desired after lighting the
appliance by rotating the variable adjustment
control knob (HI/LO) located on the front of
the valve (refer to Figures 4 & 5).
2. During the fi rst initial burns of these appli-
ances, there will be some odor emitted (see
Burn-In Period on Page 3 ).
Gas
Inlet
Gas
Outlet
Piezo Igniter
Main Gas
Control Knob
OFF/PILOT/ON
Terminals
TPTH,TP & TH
SIT Millivolt Gas Valve
Gas
Outlet
3. Keep the lower control compartment clean
by vacuuming or brushing at least twice a
year. More frequent cleaning may be required
due to excessive lint from carpeting, bedding
materials, pet hair, etc. It is very important
that the control compartments, burners
and circulating air passageways of the
appliance are kept clean.
4. Always turn off gas to the pilot (millivolt
appliances) and let the appliance cool down
before cleaning. Before re-lighting, refer
to the lighting instructions in this manual.
Lighting instructions may also be found
on the pull out lighting instruction labels
attached to the gas control valve.
5. Always keep the appliance area clear and
free from combustible materials, gasoline
and other fl ammable liquids.
6. Remember, Millivolt appliances have a continu-
ous burning pilot fl ame. Exercise caution when
using products with combustible vapors.
MAINTENANCE
(See Maintenance Schedule, Page 19)
Refer to the maintenance schedule for maintenance
tasks, procedures, periodicity and by whom they
should be performed. Always verify proper operation of the appliance after servicing.
WARNING
Turn off gas and electrical power
before servicing the appliance.
CAUTION
Wear gloves and safety Glasses
for protection while doing
required maintenance
.
IMPORTANT
Always verify proper operation
after servicing.
Before re-lighting the fi replace, refer to the
lighting instructions in this manual. Instructions are also found on pull-out panels
located below the glass door in the control
compartment.
HI/LO Variable
Flame Height
Adjustment
Figure 5
H
I
O
L
ON
OFF
Optional Burner OFF/ON
Rocker Switch
F
F
T
O
O
L
I
P
N
O
Main Gas
Control Knob
OFF/PILOT/ON
ON
OFF
Optional Blower OFF/ON
Rocker Switch
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Piezo Igniter
Gas
Inlet
Honeywell Millivolt Gas Valve
Inspect Venting System
The appliance and venting system should be
thoroughly inspected before initial use and at
least annually by a qualifi ed service technician
(inspection should include ensuring that exhaust
or intake passages are unobstructed and vent
components are properly assembled and not
damaged). If the venting system is disassembled
for any reason, a qualifi ed service technician
should follow vent installation instructions for
proper reassembly and proper sealing of the
venting system components. However, more
frequent periodic inspections and cleanings
should be performed by the homeowner.
5
Page 6
Clean Lower Control Compartment
Keep lower control compartment clean by
vacuuming or brushing it out at least twice a
year (also clean the air venturi with a brush or
wire). More frequent cleaning may be required
due to accumulation of lint from carpeting,
bedding materials, pet hair, spider webs, etc. It
is very important that control compartments,
burners, circulating air passageways and air
venturi on the appliance are NOT obstructed
in any way.
Cleaning Glass
(see Front Glass Enclosure Panel, Removal
and Installation on Page 7) Note: Clean glass
after fi rst two weeks of operation (after Burn-In
period is over) and then only when necessary
and when the fi replace 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 periodically to remove any build-up caused from the
following:
IMPORTANT
Do not use abrasive cleaners
on glass. Never clean the glass
when it is hot.
• During start-up, it is normal for condensation to form on the inside of the glass (this
condensation and fog will usually disappear
in a few minutes). The moisture can cause
lint, dust and other airborne particles to cling
to the glass surface.
• Initial curing of the high temperature paint
and burning off of lubricants used in the
manufacturing process may result in a fi lm
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 fi replace/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 fi rmly.
Clean Logs And Burner
Carefully remove the logs (use care when handling the fi ber logs, as they become quite fragile
after curing). Vacuum out any foreign matter
(lint, carbon, etc). on the burner. Ensure the
burner ports are “open.” Remove any carbon
deposits from the under side of the logs using
a vacuum cleaner, or a soft bristled brush (i.e.
paint brush). Note: Improper positioning of
logs can create carbon build-up and will alter
the performance of the appliance.
6
Replacing Logs -
If the logs become damaged by accident or improper handling and need replacement, use only
the proper replacement logs from manufacturer
(see Pages 22 & 23 for ordering information).
Re-Install Embers, Logs and Vermiculite
- Carefully follow placement instructions on
Pages 8 to 10 ). All logs should fi t onto corresponding pins and/or log stoppers. This will
ensure a proper fl ame and safe combustion.
Inspect Wiring
Refer to wiring diagrams on Page 13.
WARNING
Label all wires prior to disconnection when servicing controls. Wiring errors can cause
improper and dangerous operation. Verify proper operation
after servicing.
Inspect and clean all wire connections. Ensure
that there is no melting or damage. Inspection
should include:
• Terminals at the Valve
• OFF/ON Switch
• (Optional Control Switch) Wall Thermostat,
Remote Control or Remote Wall Switch Kit
Inspect Burner Flame Appearance
Ensure that the burner flame appearance
resembles the fl ame shown in Figures 10 &
11 and as described in Flame Appearance and
Sooting on Page 11. The Homeowner must
contact a qualifi ed service technician at once
if any abnormal condition is observed.
Small Area Paint Touch-up
The fi nish of the appliance is a high quality
powdercoat. Only use factory supplied powdercoat paint kit for touch-ups. Paint is available at
your local authorized Lennox Hearth Products
dealer (cat. no. 90L74). Never attempt to paint
a hot fi replace.
Do not attempt to repaint the appliance until the
fi nish is completely cured (see Burn-In Period
on Page 3 ) . If the surface later becomes stained
or marred, it may be lightly sanded and touched
up with spray paint.
Front Glass Enclosure Panel, Removal
and Installation
WARNING
Do not operate appliance with the
glass front removed, cracked or
broken. Replacement of the glass
should be done by a licensed or
qualifi ed service technician.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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
Handle this glass with extreme
care! Tempered glass is susceptible to damage – do not scratch
or handle roughly while reinstalling the glass door frame.
WARNING
Do not attempt to touch the front
enclosure glass with your hands
while the fi replace is in use.
WARNING
The glass door of this appliance must only be replaced as a
complete unit as provided by the
manufacturer. Do not attempt to
replace broken, cracked or chipped
glass separately.
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 fi rebox, and the appliance may only be operated without the front glass enclosure panel
in place for very brief periods of time during
appliance checkout and adjustment. Note: The
fl ame appearance will be diminished while the
front glass enclosure panel is removed.
During this appliance checkout and adjustment period, a potential safety hazard exists
- EXERCISE EXTREME CAUTION to prevent
the occurrence of any burn injuries from the
exposed fl ames or hot surfaces. Also note, that
while the front glass enclosure panel (or any of
the panels) is removed, the fl ame appearance
will appear to be smaller than normal.
Page 7
Top Flange on
Glass Door
Glass Door
Bottom Vee-fl ange
Glass Door
Glass Door Latch
Firebox Floor
Figure 6 - INSTALLING GLASS DOOR
Removing Glass Enclosure Panels
(see Figure 6)
1. Remove the top louver assembly by pulling
it up and out.
2. Remove the control compartment access
door (see removal instructions on Page 4
- Removing Control Compartment Door).
3. Locate the two (2) latches at the top of the
control compartment. To disengage the two
latches from the bottom vee-fl ange of the
glass enclosure panel, reach for the handles
located towards the back of the latches and
pull the handles down toward the front of
the appliance.
4. Swing the bottom of the door out and raise
it slightly to lift the top fl ange of the door
frame away from the appliance.
Installing Glass Enclosure Panels
(see Figure 6 )
1. Visually inspect the gasket on the backside
of the glass panel. The gasket surface must
be clean, free of irregularities and seated
fi rmly.
2. Position the glass enclosure panel in front of
the fi rebox opening at a 45 degree angle and
engage the top fl ange over the lip at the top
of the fi rebox opening. See Figure 6.
3. Swing the glass enclosure panel down and
back. Ensure the gasket seats evenly as the
panel draws shut. Engage the Vee-fl ange at
the bottom of the panel with the latches and
close the latches to secure the panel.
4. Reinstall the control compartment door
see installation instructions on Page 4 ,
Reinstalling Control Compartment Door).
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
7
Page 8
INSTALL VERMICULITE, VOLCANIC
STONE, GLOWING EMBERS AND LOGS
1. Remove the front glass enclosure panel
(see Removing Glass Enclosure Panels on
this page).
2. Carefully remove the old logs, embers
volcanic stone and vermiculite from the
fi rebox. Handle logs carefully to prevent
breakage.
3. Install Vermiculite - Place some vermiculite
on the fi rebox fl oor around the burner (the
entire bag of vermiculite will NOT be used).
See Figures 8 & 9. DO NOT PLACE ANY
VERMICULITE ON THE BURNER. Mound
up a portion of the vermiculite in front of the
burner.
4. Install decorative volcanic stone - Sprinkle
the decorative volcanic stone (dark colored)
on top of the vermiculite (light colored) in a
pleasing pattern (see Figures 8 & 9).
5. Placement of Glowing Embers -
Separate the Embers (rockwool) into pieces
about the size of a quarter (see Figure 7).
Keep the pieces fl uffed up, not matted.
Distribute these pieces over the surface of
the burner, as shown in Figures 8 & 9. Do
not use more than is necessary. Ensure that
the main burner slots remain uncovered by
the ember material.
Note: This appliance is provided with enough
Glowing Embers for several applications, do
not use all that is in a new bag at one time. For
best glowing effect, replace the ember material
annually.
6. Placement of Logs and Twigs -
All logs that have locating notches or slots to
help ensure that they are properly positioned.
All top logs that rest on lower logs, do so
over notches, indents or pins. Proper twig
placement is critical to prevent sooting. Twigs
should be placed in the gaps between the fl ame
peaks and should be positioned so they do not
impinge the fl ames.
LMDV-3328 & LMDV-3530 - Install as Follows
Carefully position the ceramic fi ber logs and twigs
over the burner as shown in Figure 8. Logs
should be placed in the order shown and per the
following instructions.
1. Place the rear log (A) as shown. Position the
2 notches on the bottom of the log over the
2 corresponding locating brackets against
the back wall of fi rebox.
2. Place the left log (B) as shown. The notch
on the bottom of the log should fi t over the
corresponding locating bracket.
3. Place the right log (E) as shown. The hole
on the back of the log should fi t over the
corresponding pin on the rear log (A). Make
sure that the log is positioned so it aligns
to the sides of the gas ports on the corner
of the burner.
4. Place the left center log (C) as shown.
The forked end of the log fi ts into the corresponding notch on rear log (A). The slot
on the other end (bottom) of log fi ts over
the corresponding locating bracket on the
sub-fl oor.
5. Place the right center log (D) as shown. One
end of the log fi ts into the corresponding
indent on the right log (E). The slot on
the other end (bottom) of log fi ts over the
corresponding locating bracket on the subfl oor.
LMDV-4035 - Install as Follows
Carefully position the ceramic fi ber logs and twigs
over the burner as shown in Figure 9. Logs
should be placed in the order shown and per the
following instructions.
1. Position the center log (C) onto the 2 cor-
responding location pins on the burner.
2. Place the rear log (A) as shown. Position the
2 notches on the bottom of the log over the
2 corresponding locating brackets against
the back wall of fi rebox.
3. Place the left log (B) as shown. The notch
on the bottom of the log should fi t over the
corresponding locating bracket.
4. Place the right log (E) as shown. The notch
on the bottom of the log should fi t over the
corresponding locating bracket. Make sure
that the log is positioned so it aligns to the
sides of the gas ports on the corner of the
burner.
5. Place the center front log (D) as shown.
The slot in the bottom of the log fi ts over
the corresponding location bracket on the
sub-fl oor.
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.
WARNING
The size and position of the log
set was engineered to give the
appliance a safe, reliable and
attractive fl ame pattern. Any
attempt to use a different log
set in the fi replace will void
the warranty and will result in
incomplete combustion, sooting, and poor fl ame quality.
WARNING
This appliance is not designed
to burn wood. Any attempt to
do so could cause irreparable
damage to appliance and prove
hazardous to your safety.
WARNING
If logs are not installed according
to the log installation instructions,
fl ame impingement and improper
combustion could occur and result
in soot and/or excessive production of carbon monoxide (CO), a
colorless, odorless, toxic gas.
Glowing Embers
Separate into Quarter
Size (separate) Pieces
Bag of Glowing
Embers (rockwool)
Figure 7
REFERENCE
Firebox Accessories / Parts
Cat. No. Model No. Description
88L53 FGE Bag of Glowing Embers
42363
80L42 FDVS
Table 8
(1 oz. rockwool)
Vermiculite, Bag (2 liters)
Bag of Decorative
Volcanic Stone
8
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Page 9
MODEL LMDV-3328 & LMDV-3530
Log Placement Instructions
LOG SET
Catalog Number
* Item
A
B
C
D
E
* Item "letters" above correspond to photos
Install the Embers, Vermiculite, Volcanic Stone and Logs in the order
shown here (1 through 6) and per the instructions on Page 8.
H3366
Description
Log, Rear
Log, Left
Log, Left Center
Log, Right Center
Log, Right
A
D
B
C
E
1
Volcanic
Stone
2
3
DO NOT PLACE EMBERS OVER GAS SLOTS
Embers
Vermiculite
The 2 notches on log bottom rest on locating brackets
A
Notch
Notch
4
Hole on bot-
A
V-Shape area of log (E) should
align to sides of burner ports
tom of log (E)
fi ts over pin
on log (A).
E
5
Log (C) fi ts into
indent in Log (A)
A
C
Slot on bottom of Log
(C) fi ts over bracket
6
Figure 8
Log (D) fi ts
into indent
on Log (E)
Slot fi ts over bracket.
B
E
D
Slot on bottom of Log
(D) fi ts over bracket
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
9
Page 10
MODEL LMDV-4035
Log Placement Instructions
LOG SET
Catalog Number
* Item
A
B
C
D
E
* Item "letters" above correspond to photos
Install the Embers, Vermiculite, Volcanic Stone and Logs in the order
shown here (1 through 6) and per the instructions on Page 8.
1
Volcanic
Stone
2
DO NOT PLACE EMBERS OVER GAS SLOTS
Place log over pins
H3365
Description
Log, Rear
Log, Left
Log, Center
Log, Center Front
Log, Right
Embers
Vermiculite
A
C
B
E
D
4
B
Notch on log bottom
fi ts over bracket
3
Figure 9
Notch
C
5
Pin
Pin
E
The 2 notches
A
on log bottom
rest on locating
brackets
Notch
Notch on log bottom
fi ts over bracket
6
D
Slot on bottom of Log
(D) fi ts over bracket
10
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Page 11
BURNER ADJUSTMENTS
(QUALIFIED TECHNICIANS ONLY)
Flame Appearance and sooting
Proper fl ame appearance is a fl ame which is
blue at the base and becomes yellowish-orange
in the body of the fl ame. When the appliance
is fi rst lit, the entire fl ame may be blue and will
gradually turn yellowish-orange during the fi rst
15 minutes of operation. If after a short period
the fl ame stays lowered blue, or if the fl ame is
orange with evidence of sooting (black tip), the
air shutter opening may need to be adjusted.
If the air shutter openings closed too far, sooting
may develop. Sooting is indicated by black puffs
developing at the tips of very long orange fl 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
fl ames and lack of combustion air entering the
air shutter opening. To achieve a warm yellowish-orange fl 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, fi rst check
the log set positioning to ensure that the
fl 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 fl ames that appear
blue and transparent. These weak, blue and
transparent fl ames are termed anemic.
• Propane models may exhibit fl ames which
candle or appear stringy. If this is present
and persists, adjust the air shutter to a more
open position, then operate the appliance for
a few more minutes to ensure that the fl ame
normalizes and the fl ames do not appear
sooty.
Figure 10 - Burner Flame Appearance Model LMDV-3328 & LMDV-3530
Figure 11 - Burner Flame Appearance Model LMDV-4035
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
gap should be
increased
Air shutter
gap should be
decreased
:
Air Shutter
Adjustment
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
11
Page 12
Burner Air Shutter Adjustment Procedure
1. Locate adjustment rod and adjust air shutter
to the standard setting as shown in Figure
12 (adjustment rod is located in the lower
control compartment). Note: Rotating the
adjustment rod clockwise decreases air and
counterclockwise increases air.
2. Light appliance (follow lighting procedure on
lighting label in control compartment or see
homeowners manual).
3. Allow the burner to operate for at least 15 min-
utes while observing the fl ame continuously
to ensure that the proper fl ame appearance
has been achieved (see Figures 10 or 11). If
the following conditions are present, adjust
accordingly.
• If flame appears weak or sooty, adjust
the air shutter, incrementally, to a more
open position until the proper fl ame
appearance is achieved.
• If fl ame stays lowered blue, adjust the
air shutter, incrementally, to a more
closed position until the proper fl ame
appearance is achieved.
4. Leave the control knob (off/pilot/on) in the
ON position and the burner OFF/ON switch
OFF (& remote switches, if applicable).
5. When satisfi ed that the burner fl ame ap-
pearance is normal, close the lower control
compartment door.
WARNING
Air shutter adjustment should
only be performed by a qualifi ed
professional service technician.
WARNING
Ensure front glass panel is in place
and sealed during adjustment.
CAUTION
The air shutter door and nearby
appliance surfaces are hot. Exercise caution to avoid injury while
adjusting fl ame appearance.
CAUTION
Carbon 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.
Burner Air Shutter Adjustment
Adjustment Set-Screw
Adjustment Rod Up
(Fully Open Position)
Burner Tube
Air Shutter
Adjustment Rod Down
(minimum air opening
position)
Main Burner Factory Air Shutter
Opening Setting - Inches (millimeter)
Model Natural
Gas
LMDVT-3328
LMDVR-3328
LMDV-3530
LMDV-4035
Figure 12
Millivolt Appliance Checkout
The pilot fl ame should be steady, not lifting
or fl oating. 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 fl ame. The fl ame should
project 1" (25 mm) beyond the hood at all three
ports. See Figures 13 or 14.
To light the burner, refer to the lighting instructions on Page 17.
1/16"
(1.58 mm)
1/16"
(1.58 mm)
1/16"
(1.58 mm)
1/8"
(3.18mm)
Propane
Gas
1/4"
(6.35 mm)
1/4"
(6.35 mm)
5/16"
(7.94 mm)
3/8"
(9.53 mm)
SIT MILLIVOLT PILOT ASSEMBLY
Proper Pilot Flame Appearance
Hood
Thermocouple
Pilot
Nozzels
Figure 13
HONEYWELL MILLIVOLT PILOT ASSEMBLY
1/8" Min.
(3 mm)
Pilot
Nozzels
Thermopile
Proper Pilot Flame Appearance
Thermocouple
Igniter Rod
Figure 14
Electronic Appliance Checkout
To light the burner, refer to the lighting instructions on Page 18. Ensure the igniter lights the
pilot. The pilot fl ame should engulf the fl ame
sensor as shown in Figure 15.
ELECTRONIC PILOT ASSEMBLY
Proper Pilot Flame Appearance
Proper Flame
Adjustment
Pilot
Nozzels
Figure 15
Igniter Rod
3/8" Min.
(9 mm)
Hood
3/8" Min.
(9 mm)
Thermopile
3/8" to 1/2"
(9 -13 mm)
Ground
Electrode
Flame Rod
Hot Surface
Igniter
12
With proper care and maintenance, your appliance will provide many years of enjoyment. If
you should experience any problem, fi rst refer
to the troubleshooting guide in this manual.
If problem persists, contact your Lennox
distributor.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Page 13
WIRING DIAGRAMS
Wiring diagrams are provided here for reference purposes only. This information is also
provided on schematics attached directly to the
appliance on a pullout panel located within the
control compartment.
CAUTION
Label all wires prior to disconnection when servicing controls. Wiring errors can cause
improper and dangerous appliance operation.
Millivolt Wiring Diagram
Schematic Representation Only
If any of the original wire as supplied must
be replaced, it must be replaced with Type
AWM 105
Standard OFF/ON Switch
* Optional Kits Installed - OFF/ON wall switch,
wall thermostat or remote control receiver.
Note: Turn the appliance-mounted OFF/ON
burner control switch to the OFF position if
any of these kits are installed.
Figure 16
o
C - 18 gage wire.
Thermopile
*Optional Switch
TP
TH
TP
TH
Field Wired
Factory
Wired
Electronic Wiring Diagram (Honeywell) Showing Blower Wiring for Optional FBK-100, FBK-200 & FBK-250 Kits
Schematic Representation Only
Wall Mounted Blower Speed Control Switch or
Auxiliary View A
J-Box Wiring when
using unit mounted
relay module.
BK
W
G
Junction Box
Pilot Burner
Assembly
BL
BL
BK
Optional Control Switch
C
AV
02
1
Igniter
Connector
Relay Module C/W FBK-250 only. Plug blower
into J-Box receptacle for FBK-100 or FBK-200
application. View A for J-Box wiring.
Optional Blower
*OFF/ON Switch
(Integral with
Gas Valve)
Honeywell
Electronic
Gas
Valve
24 V
Secondary
GROUND
Field Wired
Factory
Wired
Transformer
BL
R
BK
BK = BLACK BL = BLUE
BK
R = RED W = WHITE
W
G = GREEN
ON/OFF Switch for Blower Kit (optional)
Outlet Box Green
Ground Screw
Break off Tab
Hot side
of Outlet
* Leave the OFF/ON switch, which is
integral with the gas valve, in the ON
position.
** Optional Control Switches: Wall
Switch, Wall Thermostat or Remote
120 VAC
Primary
Control Receiver.
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.
120
VAC
Junction
Box
BK
W
G
G
BK
R
White Wire
to Opposite
Side (neutral)
Figure 17
WARRANTY
Your gas appliance is covered by a limited twenty
year warranty. You will fi nd a copy of the warranty accompanying this manual. Please read
the warranty to be familiar with its coverage.
Retain this manual. File it with your other documents for future reference.
PRODUCT REFERENCE INFORMATION
We recommend that you record the following important information about your fi replace. Please
contact your Lennox dealer for any questions
or concerns. For the number of your nearest
Lennox dealer, please call 800-731-8101
REPLACEMENT PARTS
A complete parts list is found at the end of
this manual. Use only parts supplied from the
manufacturer.
Normally, all parts should be ordered through
your Lennox distributor or dealer. Parts will be
shipped at prevailing prices at time of order.
When ordering repair parts, always give the
following information:
1. The model number of the appliance.
2. The serial number of the appliance.
3. The part number.
4. The description of the part.
5. The quantity required.
6. The installation date of the appliance.
Your Fireplace's Model Number ________________________________________
Your Fireplace's Serial Number ________________________________________
The Date On Which Your Fireplace Was Installed ___________________________
The Type of Gas Your Fireplace Uses ____________________________________
Your Dealer's Name ________________________________________________
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
If you encounter any problems or have any questions concerning the installation or application
of this system, please contact your distributor,
or Lennox directly:
LENNOX HEARTH PRODUCTS
1110 West Taft Avenue
Orange, CA 92865
13
Page 14
ACCESSORY COMPONENTS
Product Reference Information
Cat.
No.
H3313 LMDVT-3328CNM 95 lb. 13.08 cu. ft.
H3314 LMDVT-3328CPM 9 5 lb. 13.08 cu. ft.
H3315 LMDVR-3328CNM 95 lb. 13.08 cu. ft.
H3316 LMDVR-3328CPM 95 lb. 13.08 cu. ft.
H3317 LMDVT-3328CNE 95 lb. 13.08 cu. ft.
H3318 LMDVR-3328CNE 95 lb. 13.08 cu. ft.
H3319 LMDV-3530CNM 113 lb. 15.75 cu. ft.
H3320 LMDV-3530CPM 113 lb. 15.75 cu. ft.
H3321 LMDV-3530CNE 113 lb. 15.75 cu. ft.
H3322 LMDV-4035CNM 147 lb. 20.18 cu. ft.
H3323 LMDV-4035CPM 147 lb. 20.18 cu. ft.
H3324 LMDV-4035CNE 147 lb. 20.18 cu. ft.
Model Ship.
Weight
Volumn
Wall Thermostat
The wall thermostat kit
provides temperature
control for optimum
comfort.
Ship.
Remote Control Kit, Standard
Cat. No. Model No. Description
H0249 RCL Remote Control System
(Standard)
(ref. Form # 750,127M)
Standard Remote Control
System
The Model RCL (Standard) Remote
Control System, features a simplistic OFF/ON control function for the
fi replace. This model includes a
hand-held transmitter, a remote
receiver with wall-mount cover
plate and all hardware required to
install the unit. The remote receiver
can be wall or hearth mounted.
The transmitter has ON and OFF functions that are
activated by pressing either button on the face of
the transmitter. When a button on the transmitter
is pressed, a signal light illuminates briefl y to verify
that a signal has been sent.
The Model RCL is designed to operate with all millivolt ignition systems, as well as electronic ignition
systems. It may be installed with use for either
natural gas or propane gas appliances. The RCL
offers ease of installation and allows you to execute
on-off commands to the fi replace effortlessly with
one simple motion.
The Model RCL comes complete with detailed operating instructions.
Remote Control Kit, Deluxe
Cat. No. Model No. Description
H0251 RCL-STAT Remote Control System
(Deluxe)
(ref. Form # 750,129M)
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 screen which presents
access to many enhancements,
including; battery power level indicator, timer, mode of operation,
thermostatic display including
room temperature in either metric
of English units, fl ame indicator
and clock. Fully programmable,
the Model RCL-T allows for
virtual command over nearly all operational and
temperature variables, using the hand held remote
control transmitter.
The Model RCL-T (Deluxe) remote control system
is installed in the same manner as the standard
system, may be operated with electronic and millivolt systems with either natural gas or propane gas.
The RCL-T comes complete with detailed operating
instructions.
Wall Thermostat, Millivolt
Cat. No. Model No. Description
89L36 WTK Wall Thermostat Kit,
White
Unit-Mountable Rocker
Switch
This rocker switch kit can
be installed directly in the
gas valve mounting bracket
(millivolt gas valve equipped
fi replaces) to provide On/Off
operation in lieu of a wall
switch.
Rocker Switch Kit
Cat. No. Model No. Description
80L41 FRS Rocker Switch Kit
(ref. Form # 750,037M)
White Wall Switch Kit
Cat. No. Model No. Description
85L87 FWSK OFF/ON Wall Switch Kit
OFF/ON Wall Switch Kit
The OFF/ON wall switch kit may be used to control
the operation of the fi replace burner. Install the
OFF/ON wall switch in a convenient location near
the fi replace.
14
P
T
A
N
I
Touch-Up Paint Kits
(all models)
Cat. No. Model No. Description
90L74 TPK-C Touch-Up Paint (Charcoal)
(TPK-C ref. Form # 504,216M)
Touch-Up Paint Kit
Repair of minor scratches and discoloration of the
appliance charcoal painted surfaces may be accomplished with the touch-up paint kit.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Arch Door Kit - Polished Brass
Cat. No. Model Fireplace Model
98L05 ADK33CPB
26M43 ADK35CMPB LMDV-3530
81L35 ADK40CPB LMDV-4035
Arch Door Kit - Brushed Stainless Steel
Cat. No. Model Fireplace Model
98L62 ADK33CBS
26M44 ADK35CMBS LMDV-3530
98L69 ADK40CBS LMDV-4035
(ref. Form # 750,021M)
LMDVT-3328,
LMDVR-3328
LMDVT-3328,
LMDVR-3328
Arch Door Kits
The arch door kits are easy to install and do not require hardware to attach them to the standard door
frame. The decorative arch kits can not be used in
conjunction with the screen panel kit.
Page 15
ACCESSORY COMPONENTS (CONTINUED)
Forced Air Blower Kits
Cat.
Model No. Description
No.
80L84 FBK-100 Blower, Standard
80L85 FBK-200 Blower, Variable Speed
80L86 FBK-250 Blower, Variable Speed
94L89 FBK-100-36 Blower, Standard, 36 Pack
94L90 FBK-200-36 Blower Kit - Variable Speed
H0543 FBK-250-36 Blower Kit - Variable Speed
(ref. Form # 750,028M & 750,029M)
Forced Air Kit
The FBK-100 blower provides constant velocity forced
air circulation. The FBK-200 assembly with variable
speed, wall-mountable switch provides variable speed
forced air circulation. The FBK-250 assembly with
variable speed unit-mountable switch, also provides
variable speed forced air circulation.
Variable Speed Wall Switch
Cat. No. Model No. Description
045571H VSWS Rocker Switch Kit
Variable Speed Wall Switch
Provides variable speed control if optional blower
kit is purchased.
Brickaded Wall Liner Kits
Cat. No. Model No. Description
H0912 MBLK-33T
H0918 MBLK-33R
H0913 MBLK-35
H0914 MBLK-40
(ref. Form # 750,160M)
Brickaded Panel Liner Kit
The brickaded liner kits include ceramic panels as
shown here. The panels have brick-like features in relief.
(single speed)
(w/wall-mounted switch)
(w/unit-mounted switch)
with Wall Switch 36 Pack
with Thermo Snap Switch
36 Pack
Brick Liner Kit, Top Vent,
LMDVT-3328
Brick Liner Kit, Rear Vent,
LMDVR-3328
Brick Liner Kit, Top/Rear,
LMDV-3530
Brick Liner Kit, Top/Rear,
LMDV-4035
Style View Doors - Arch Design Kits
Cat. No. Model Description Model
H0858 AD35C 35” Arch Doors, Charcoal
H0859 AD35TI 35” Arch Doors, Textured Iron
H0860 AD35SP 35” Arch Doors, Satin Pewter
H0861 AD35AB 35” Arch Doors, Antique Brass
H0862 AD40C 40” Arch Doors, Charcoal
H0863 AD40TI 40” Arch Doors, Textured Iron
H0864 AD40SP 40” Arch Doors, Satin Pewter
H0865 AD40AB 40” Arch Doors, Antique Brass
Series
Arch Design
LMDV-3530
LMDV-4035
Style View Doors - Arch Pane Design Kits
H0930 APD35C 35” Arch Pane Doors, Charcoal
H0931 APD35TI 35” Arch Pane Doors, Textured Iron
H0932 APD35SP 35” Arch Pane Doors, Satin Pewter
H0933 APD35AB 35” Arch Pane Doors, Antique Brass
H0934 APD40C 40” Arch Pane Doors, Charcoal
H0935 APD40TI 40” Arch Pane Doors, Textured Iron
H0936 APD40SP 40” Arch Pane Doors, Satin Pewter
H0937 APD40AB 40” Arch Pane Doors, Antique Brass
LMDV-3530
LMDV-4035
Arch Pane Design
Style View Doors - Square Design Kits
H0946 SD35C 35” Sq. Doors, Charcoal
H0947 SD35TI 35” Sq. Doors, Textured Iron
H0948 SD35SP 35” Sq. Doors, Satin Pewter
H0949 SD35AB 35” Sq. Doors, Antique Brass
H0950 SD40C 40” Sq. Doors, Charcoal
H0951 SD40TI 40” Sq. Doors, Textured Iron
H0952 SD40SP 40” Sq. Doors, Satin Pewter
H0953 SD40AB 40” Sq. Doors, Antique Brass
LMDV-3530
LMDV-4035
Square Design
Style View Doors - Square Pane Design Kits
H0962 SPD35C 35” Sq. Pane Doors, Charcoal
H0963 SPD35TI 35” Sq. Pane Doors, Textured Iron
H0964 SPD35SP 35” Sq. Pane Doors, Satin Pewter
H0965 SPD35AB 35” Sq. Pane Doors, Antique Brass
H0966 SPD40C 40” Sq. Pane Doors, Charcoal
H0967 SPD40TI 40” Sq. Pane Doors, Textured Iron
H0968 SPD40SP 40” Sq. Pane Doors, Satin Pewter
H0969 SPD40AB 40” Sq. Pane Doors, Antique Brass
(ref. Form # 775,169M)
LMDV-3530
LMDV-4035
Square Pane Design
Style View Doors -
Style View Doors come in 4 beautiful styles. They are easy to install and will not require hardware to attach them to
the standard glass door frame. The door includes heavy duty magnet door latches and functional twin-pane doors.
Decorative Firebox Accessories
(all models)
Cat. No. Model No. Description
88L53 FGE
80L42 FDVS
(FDVS ref. Form #750,010M)
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Bag of Glowing Embers
(1 oz. rockwool)
Bag of Decorative
Volcanic Stone
Bag of Glowing Embers
Bag of Volcanic Stone
Replacement ember materials or volcanic stone are
available for use with these appliances. Order kits as
part of the periodic maintenance of the appliance.
15
Page 16
ACCESSORY COMPONENTS (CONTINUED)
Polished Brass 3Piece Trim Kit
This kit contains brass
trim pieces used to fi nish the gaps between
the wall board and the
the appliance a brass perimeter highlight. This kit
contains the trim pieces and these instructions.
3 Piece Trim Kit
Cat. No. Model No. Description
H0453 TK33PB3
96K21 TK35PB3
96K22 TK40PB3
H1813 TK33BS3
H1815 TK35BS3
H1816
TK40BS3
(ref. Form # 750,147M)
fireplace, providing
33” Polished Brass,
LMDVT-3328, LMDVR-3328
35” Polished Brass,
LMDV-3530
40", Polished Brass,
LMDV-4035
33” Brushed Stainless,
LMDVT-3328, LMDVR-3328
35” Brushed Stainless,
LMDV-3530
40", Brushed Stainless,
LMDV-4035
* Assembled 8-Piece Louver Kits
Polished Brass Brushed Stainless Models
Where Used
Cat. # Model Cat. # Model
H1522 LK-400B H1523 LK-400BS
H1524 LK-500B H1525 LK-500BS
H1526 LK-600B H1527 LK-600BS
(ref. Form # 750,166M)
LMDVT-3328
LMDVR-3328
LMDV-3530
LMDV-4035
* Lennox Nameplate Logo, 12L15, is sold separately.
Polished Brass & Brushed Stainless Louvers Kits
These kits include a top 4-louver assembly and a bottom 4-louver assembly. They provide a touch of elegance.
These kits can be retrofi tted to previously installed appliances.
2- Piece Door Frame Kits
Polished Brass Brushed Stainless
Cat. # Model Cat. # Model
98L18 2DFK33PB 98L19 2DFK33BS
26M88 2DFK35PB 26M91 2DFK35BS LMDV-4035
26M89 2DFK40PB 26M92 2DFK40BS LMDV-4035
(ref. Form # 750,098M)
Models
Where Used
LMDVT-3328
LMDVR-3328
Polished Brass & Brushed Stainless 2-Piece Door Frame Kits
These kits are designed to attach directly to the front face of the appliance at the glass enclosure panel's top
and bottom edges.
4 Piece Trim Kit
Cat. No. Model No. Description
96K17 TK35PB4
96K18 TK40PB4
(ref. Form # ii-9299)
Cat. No. Model No. Models Where Used
98L04 HG33
26M48 HG35M LMDV-3530
26M49 HG40M LMDV-4035
(ref. Form # 750,101M)
35” 4 Piece Finish Trim Kit,
Polished Brass, LMDV-3530
40” 4 Piece Finish Trim Kit,
Polished Brass, LMDV-4035
Screen Panel Kits
LMDVT-3328
LMDVR-3328
Screen Heat Guard Kit
This easy to install optional screen heat guard installs
over the standard glass enclosure panel to provide
protection from the hot glass surface. These screen
heat guard panels cannot be used in conjunction with
the arch door kits or door frame kits.
16
4 Piece Door Trim Kits
Polished Brass Brushed Stainless Models
Cat. # Model Cat. # Model
98L22 4DFK33PB 98L23 4DFK33BS
26M82 4DFK35PB 26M85 4DFK35BS LMDV-3530
26M83 4DFK40PB 26M86 4DFK40BS LMDV-4035
Where Used
LMDVT-3328
LMDVR-3328
(ref. Form # 750,098M)
Door Frame Kits
A decorative door frame kit is available for use with these appliances. It is designed to attach directly to the front face
of the appliance at the four edges of the glass enclosure panel resulting in the appearance of a picture frame.
Eyebrow Hood Kits
Polished Brass Brushed Stainless Models
Where Used
Cat. # Model Cat. # Model
98L10 EB33PB 98L11 EB33BS
96K67 EB35PB 88L49 EB35BS LMDV-4035
96K68 EB40PB 88L50 EB40BS LMDV-4035
* These hood kits replace the standard hood that comes with
these fi replaces.
(ref. Form #504,142M)
LMDVT-3328
LMDVR-3328
Polished Brass & Brushed Stainless Hood Kits
Attractive hoods are available in two styles. These hoods are designed to be fi tted to the glass viewing sides
of the appliance. In addition to providing an aesthetically pleasing appearance to your appliance installation,
the hood reduces heat effects to decorative mantles and fi nish materials located above the fi replace opening.
The hood kit replaces the standard hood that comes with these appliances and snaps into place. These kits
can be retrofi tted to previously installed appliances.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Page 17
LIGHTING INSTRUCTIONS – HONEYWELL AND SIT MILLIVOLT GAS VALVE
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING: IF YOU DO NOT FOLLOW THESE INSTRUCTIONS EXACTLY, A FIRE OR EXPLOSION
MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE.
A. This appliance has a pilot which must be lighted with a piezo
igniter. When lighting the pilot, follow these instructions
exactly.
B. BEFORE OPERATING smell all around the appliance area for
gas. Be sure to smell next to the fl oor because some gas is
heavier than air and will settle on the fl oor.
WHAT TO DO IF YOU SMELL GAS
• Extinguish any open fl ame.
• Open windows.
• Do not light any appliance.
• Do not touch any electrical switches.
LIGHTING INSTRUCTIONS
1. STOP! Read the safety information above on this Page.
2. Access the lower control compartment.
3. Turn remote wall switch to “OFF.”
4. Verify main line shut-off valve is open.
5. Push in gas control knob slightly and turn clockwise
to “OFF.”
IGNITER
F
T
F
O
O
L
H
I
O
L
I
P
N
O
HONEYWELL
MILLIVOLT
GAS VALVE
IN
T
P
HT
T
TP
H
L
P
I
L
O
T
OUT
I
H
F
F
O
P
I
L
O
ti
W
O
T
O
N
SIT
MILLIVOLT
GAS VALVE
6. Wait fi ve (5) minutes to clear out any gas. If you then smell gas,
7. Push in gas control knob slightly and turn counterclockwise
8. Push in control knob all the way and hold in.
• Do not use any phone in your building.
• Immediately call your gas supplier from a neighbor’s
phone.
• If your gas supplier cannot be reached, call the fi re department.
C. Use only your hand to push in or turn the gas control knob.
Never use tools. If the knob will not push in or turn by hand,
do not try to repair it, call a qualifi ed service technician. Force
or attempted repair may result in a fi re or an explosion.
D. Do not use this appliance if any part has been under water.
Immediately call a qualifi ed service technician to inspect the
appliance and to replace any part of the control system and
any gas control which has been under water.
STOP! Follow “B” in the safety information above on this Page. If you
do not smell gas, go to the next step.
to “PILOT.”
HONEYWELL
MILLIVOLT PILOT
Immediately light the pilot by triggering the
spark igniter (pushing the button) until pilot
lights. Continue to hold the control knob in
for about 1 minutes after the pilot is lit.
Release knob and it will pop back up. Pilot
should remain lit. If it goes out, repeat steps 5
through 8.
• If knob does not pop up when released,
stop and immediately call your service
technician or gas supplier.
SIT
MILLIVOLT PILOT
• If pilot will not stay lit after several tries,
turn the control knob to “OFF” and call
your service technician or gas supplier.
IGNITER
Note: Knob cannot be turned from “PILOT” to “OFF”
unless the knob is pushed in slightly. Do not force.
TO TURN OFF GAS TO APPLIANCE
1. Turn remote wall switch “OFF.” The pilot will remain lit for
normal service.
2. For complete shutdown, turn remote wall switch to “OFF.”
3. Access the lower control compartment.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
9. Turn gas control knob counterclockwise
to “ON.”
10. Close lower control compartment.
4. Depress gas control knob slightly and turn clockwise
to “OFF.” Do not force.
5. Close lower control compartment.
17
Page 18
LIGHTING INSTRUCTIONS — ELECTRONIC
FOR YOUR SAFETY READ BEFORE LIGHTING
WARNING: IF YOU DO NOT FOLLOW THESE INSTRUCTIONS EXACTLY, A FIRE OR EXPLOSION
MAY RESULT CAUSING PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE.
A. When lighting the appliance, follow these instructions
exactly.
B. BEFORE OPERATING smell all around the appliance area
for gas. Be sure to smell next to the fl oor because some
gas is heavier than air and will settle on the fl oor.
WHAT TO DO IF YOU SMELL GAS
• Extinguish any open fl ame.
• Open windows.
• Do not light any appliance.
• Do not touch any electrical switches.
• Do not use any phone in your building.
LIGHTING INSTRUCTIONS
1. STOP! Read the safety information above on this Page.
2. Turn remote wall switch to “OFF.”
3. Open lower control compartment door.
4. Verify main line shut-off valve is open.
Honeywell Electronic Gas Control Valve
ON / OFF Switch
C
O
N
T
R
NO
O
FFO
L
I
G
N
I
T
ER
Front View
NI
SI
P
• Immediately call your gas supplier from a neighbor’s
phone.
• If your gas supplier cannot be reached, call the fi re
department.
C. Use only your hand to turn the gas control lever. Never
use tools. If the lever will not turn by hand, do not try
to repair it, call a qualifi ed service technician. Force or
attempted repair may result in a fi re or an explosion.
D. Do not use this appliance if any part has been under
water. Immediately call a qualifi ed service technician
to inspect the appliance and to replace any part of the
control system and any gas control which has been under
water.
5. Turn the OFF/ON switch to “OFF”. Do not force.
6. Wait fi ve (5) minutes to clear out any gas. If you then
smell gas, STOP! Follow “B” in the safety information
above on this Page. If you do not smell gas, go to the
next step.
7. Turn the OFF/ON switch to “ON”. Do not force.
8. Turn “ON” all electrical power to appliance (remote wall
or appliance switch).
9. Close lower control compartment door.
TO SHUT OFF
1. Turn off all electrical power to the appliance (remote wall
switch).
1. For complete shut-down, turn remote wall switch to
“OFF.”
2. Open lower control compartment door.
18
TO TURN OFF GAS TO APPLIANCE
3. Turn the OFF/ON switch to “OFF”. Do not force.
4. Close the main line shut-off valve.
5. Close lower control compartment door.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Page 19
MAINTENANCE SCHEDULE
Annually (Before the onset of the Burning Season)
MAINTENANCE TASK ACCOMPLISHING PERSON PROCEDURE
Inspecting/Cleaning Burner, Logs
and Controls
Check Flame Patterns and Flame
Height
Inspecting/Cleaning Pilot and Burner Qualifi ed Service Technician
Checking Vent System Qualifi ed Service Technician Inspect the vent system at the top and at the base (within the
Appliance Checkout Qualifi ed Service Technician Perform the appropriate appliance checkout procedure detailed
Qualifi ed Service Technician Inspect valve and ensure it is properly operating. Check piping
for leaks. Vacuum the control compartment, fi replace logs and
burner area.
Qualifi ed Service Technician
Refer to Figure10 (LMDV-3328 & LMDV-3530) or Figure 11
(LMDV-4035) on Page 11 and verify the fl ame pattern and height
displayed by the appliance conforms to the picture. Flames
must not impinge on the logs. Ensure fl ames are steady (not
lifting or fl oating).
Refer to Figure 13 (SIT Millivolt), Figure 14 (Honeywell Mil-
livolt) or Figure 15 (Electronic) on Page 12. Remove any surface
build-up on pilot and burner assembly. Wipe the pilot nozzles,
igniter/fl ame rod and hood. Ensure the pilot fl ame engulfs the
fl ame sensor as shown.
fi rebox) for signs of blockage or obstruction. Look for any signs
of dislocation or deterioration of the vent components. Note:
Excessive condensation can cause corrosion of caps, pipe &
fi ttings (excessive condensation can 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.
in this manual.
Replacing Rockwool Ember Materials Homeowner/Qualifi ed Service
Technician
Periodically (After the Burning Season)
Remove old ember materials (rockwool) and vacuum the ember
placement area. Place new embers as described and shown in
Figures 8 & 9.
MAINTENANCE TASK ACCOMPLISHING PERSON PROCEDURE
Cleaning Firebox Interior Homeowner Carefully remove logs, rockwool, volcanic stone and vermiculite.
Vacuum out interior of the fi rebox. Clean fi rebox walls and log
grate. Replace logs, rockwool, vermiculite and volcanic stone
as detailed in this manual.
Check Flame Patterns and Flame
Height
Checking Vent System Homeowner Inspect the vent system at the top and at the base (within the
Cleaning Front Glass Enclosure Panel Homeowner Clean as necessary following the directions provided in this
Homeowner
Refer to Figures 10 (LMDV-3328 & LMDV-3530) or 11 (LMDV-
4035) on Page 11 and verify the fl ame pattern and height displayed by the appliance conforms to the picture. Flames must
not impinge on the logs.
fi rebox) for signs of blockage or obstruction. Look for any signs
of dislocation of the vent components.
manual. DO NOT TOUCH OR ATTEMPT TO CLEAN GLASS
WHILE HOT.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
19
Page 20
TROUBLESHOOTING
Note: Before troubleshooting the gas control system, Ensure external gas shut off valve, located at gas supply inlet, (and wall switch, iff applicable), is
in the “ON” position.
Important: Valve system troubleshooting should only be accomplished by a qualifi ed service technician.
TROUBLESHOOTING GUIDE - MILLIVOLT GAS CONTROL SYSTEM
SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION
1. Spark igniter will not light pilot after
repeated triggering of igniter button.
2. Pilot will not stay lit after
carefully following the lighting
instructions.
3. Pilot burning, no gas to burner, Valve
knob “ON,” and the (standard) burner
OFF/ON switch is “ON." Read important note below.
IMPORTANT NOTE: If an optional
*remote switch is used for burner
operation, if the standard burner
OFF/ON switch is still installed on
appliance it must be in the "OFF"
position.
*Optional remote switch kits - wall
switch, wall thermostat or remote
control.
4. Frequent pilot/burner outage prob-
lem.
A. Defective igniter
(no spark at electrode).
B. Defective or misaligned electrode at pilot
(spark at electrode).
C. Gas supply pressure errant.
D. Pilot orifi ce plugged.
A. Defective pilot generator
(thermocouple).
A. Wall switch or wires defective.
B. Thermopile may not be generating suf-
fi cient millivolts.
C. Plugged burner orifi ce.
D. OFF/ON Switch & *Remote Switch are in
the "ON" position resulting in excessive
resistance.
A. Pilot fl ame may be too low or blowing (high)
causing the pilot/valve safety to drop out.
Check for spark at electrode and pilot; if no spark and
electrode wire is properly connected, replace igniter.
Using a match, light pilot. If pilot lights, turn off pilot
and trigger the igniter button again. If pilot lights, an
improper gas mixture caused the bad lighting and a
longer purge period is recommended. If pilot will not
light – check gap at electrode and pilot – should be 1/8"
to have a strong spark. If gap measures 1/8", replace
pilot (see Figures 13 or 14 on Page 12).
Check inlet gas pressure. It should be within the limits
as marked on the rating plate.
Clean or replace pilot orifi ce.
Check pilot fl ame, it must impinge on thermocouple
(see Figures 13 or 14 on Page 12). Clean and/or
adjust pilot for maximum fl ame impingement on
thermocouple. Ensure that the connection between
the valve and thermocouple are tight and secure.
Check wall switch and wires for proper connections.
Jumper wire across terminals at wall switch, if burner
comes on, replace defective wall switch. If okay, jumper
wires across wall switch wires at valve, if burner comes
on, wires are faulty or connections are bad.
Check thermopile with millivolt meter. Take reading
at thermopile terminals of gas valve. Should read
325 millivolts minimum with optional wall switch
“OFF.” Replace faulty thermopile if reading is below
specifi ed minimum.
Check burner orifi ce for blockage and remove.
When turning on the burner using a *remote switch,
ensure that the standard OFF/ON switch is in the "OFF"
position. If both switches are in the ON position, it
may result in excessive resistance (& millivolt drainage) and the burner may not come on.
Clean and/or adjust pilot fl ame for maximum fl ame
impingement on thermocouple (see Figures 13 or
14 on Page 12).
TROUBLESHOOTING GUIDE - ELECTRONIC IGNITION SYSTEM
SYMPTOM POSSIBLE CAUSES CORRECTIVE ACTION
1. Burner will not light. A. Faulty Valve System.
B. “OFF/ON” or wall switch defective.
2. Burners come “ON,” then turns “OFF.” A. Burner orifi ce plugged.
B. Obstructed vent system.
20
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
See Below.
Disconnect the two black wires from the wire nuts.
Test switch(s) for continuity with a multimeter. If
continuity is not indicated, switch(s) is defective and
must be replaced.
Note: Before replacing “OFF/ON” switch, Ensure to
check wiring for loose connections or broken wires
and repair as needed.
Check main burner orifi ce(s) for blockage. Clean
or replace.
Check vent system for obstructions.
20
Page 21
TROUBLESHOOTING PROCEDURE - ELECTRONIC IGNITION SYSTEM
START CHECK
• Turn Off Gas Supply.
• Ensure Valve Switch Is In ON Position.
• Disconnect Control Harness.
• Set Thermostat To Call For Heat.
Insert A
End View of Control Harness Connector
• Check for proper voltage at control harness
(see insert A). Voltage
2
should be 24V between
thermostat or pressure
switch and 24V common
and 24V hot.
YES
• Plug control harness into
valve. Wait for internal check
delay.
NO
• Line voltage power
• Low voltage transformer
• Limit controller
• Thermostat
• Wiring
24 Volt Hot
Common
24 Volt
Switched
Check For Damaged or Missing
Terminals in Connector
Insert B
Igniter Terminals
24 Volt
• With pilot burner cable con-
1
• Igniter warms up and glows
red.
NO
nected, measure voltage at
valve HSI element output. 24V
2
nominal. (See insert B)
YES
YES • Replace igniter/fl ame rod
1
assembly.
YES
• Check that pilot gas is fl owing. Wait
• Turn on gas supply.
• Pilot burner lights.
NO
to ensure pilot gas tubing is purged.
Recycle call for heat if necessary.
YES
• Measure voltage between 24V hot and
24V common leads to valve control.
Must measure at least 19.5 VAC with
igniter powered (see insert A). To
YES
identify proper lead, this check must
be done with the valve control connected and igniter powered.
YES
• Replace Pilot Assembly.
• Check that pilot fl ame makes good
contact with pilot burner fl ame rod.
• Main valve opens and main
burner lights.
• Check for good electrical connection
NO
through the pilot tubing.
• If both of the above are good, replace
igniter/fl ame rod assembly.
YES YES
• System Is okay. • Cycle thermostat off and back on.
NO
• Replace valve.
NO
• Replace valve.
• Check transformer and
NO
line volt supply.
Igniter will cycle off and
1
back on once during the 90
second ignition trial. All
voltage measurements must
be taken while the igniter is
powered.
When measuring voltage
2
at connections, use care
to ensure terminals are
not damaged.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
• Main burner lights.
NO
• Replace valve.
21
Page 22
REPLACEMENT PARTS LIST
Item # Description LMDVT-3328 & LMDVR-3328 LMDV-3530 LMDV-4035
Part No. Qty. Part No. Qty. Part No. Qty.
1 Hood LB-91941F 1 LB-91941BY 1 LB-91941CY 1
2 Louver Assembly, Top, Charcoal
3 *Louver Assembly, Bottom, Charcoal
4 Enclosure, Glass Front (Complete) LB-92398H 1
5 Nameplate, Lennox 12L15 1 12L15 1 12L15 1
6 Latch 69L21 2 69L21 2 69L21 2
7 Log Set (Complete)
8 Burner Assembly 24M58 1 24M58 1 24M59 1
9 Orifi ce, Main Burner - Natural Gas 39L66 1 60J80 1 24M10 1
9 Orifi ce, Main Burner - Propane Gas 99K78 1 12L52 1 21L01 1
10 Bag of Glowing Embers (Rockwool) 88L53 1 88L53 1 88L53 1
10 Bag of Decorative Volcanic Stone 80L42 1 80L42 1 80L42 1
10 Bag of Vermiculite 42363 1 42363 1 42363 1
11 Gas Line Flexible Connector 93L32 1 93L32 1 93L32 1
* Lennox Nameplate Logo, 12L15, is sold separately.
H3375
H3378
H3366
1
1
1
H3376
H3379
LB-92398B
H3366
1
1
1 LB-92398C 1
1
H3377
H3380
H3365
1
1
1
Gas Controls - SIT Millivolt
Natural Gas Propane Gas
Part No. Qty. Part No. Qty.
12 Gas Valve, SIT 43K07 1 88J53 1
13 Piezo Igniter 111061 1 111061 1
14 Pilot Assembly 69L17 1 69L18 1
15 Pilot Generator 60J79 1 60J79 1
16 Thermocouple 74L57 1 74L57 1
17 Pilot Tube 74L56 1 74L56 1
18 Electrode and Cable 74L58 1 74L58 1
19 Pilot Shield LB-103507 1 LB-103507 1
20 Gas Valve, Honeywell 24M12 1 82L87 1
21 Piezo Igniter 24M89 1 24M89 1
22 Pilot Assembly 67L70 1 67L70 1
23 Pilot Generator 60J79 1 60J79 1
24 Thermocouple 67L67 1 67L67 1
25 Pilot Tube 67L68 1 67L68 1
26 Electrode and Cable 67L87 1 67L87 1
27 Pilot Shield LB-92706 1 LB-92706 1
Gas Controls - Honeywell Millivolt
Natural Gas Propane Gas
Part No. Qty. Part No. Qty.
Gas Controls - Honeywell Electronic
Natural Gas Propane Gas
Part No. Qty. Part No. Qty.
28 Gas Valve, Honeywell 62L18 1 62L19 1
29 Pilot Assembly 62L14 1 62L15 1
30 Transformer 42J32 1 42J32 1
31 Igniter Assembly (Kit) 87L54 1 87L54 1
32 Pilot Shield H1596 1 H1596 1
22
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Page 23
REPLACEMENT PARTS
LMDVT-3328 & LMDVR-3530
7
LMDV-4035
8
1
8
9
10
2
13
12
29
30
31
32
28
21
20
24
25
16
26
17
18
27
23
22
15
14
19
6
11
3
5
4
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
23
Page 24
LENNOX reserves the right to make changes at any time, without notice, in design,
materials, specifi cations, prices and also to discontinue colors, styles and products.
Consult your local distributor for fi replace code information.
Printed in U.S.A. © 2005 by LENNOX HEARTH PRODUCTS
24
P/N 875,028M REV. C 06/2005
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
1110 West Taft Avenue • Orange, CA 92865
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