Vermont Castings LX32DV(N/P)SB User manual

20306749 12/14 Rev. 1
510528
LX cover
Lexington Direct Vent Gas Fireplace
Installation and Operating Instructions
Models: LX32DV(N/P)SB, LX36DV(N/P)SB
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for
future reference.
• Do not store or use gasoline or other
ammable vapors and liquids in the
vicinity of this or any other appliance.
• WHAT TO DO IF YOU SMELL GAS
– Do not try to light any appliance.
– Do not touch any electrical switch; do
not use any phone in your building.
– Leave the building immediately.
– Immediately call your gas supplier from
a neighbor's phone. Follow the gas
supplier's instructions.
– If you cannot reach your gas supplier,
call the re department.
• Installation and service must be performed
by a qualied installer, service agency or
the gas supplier.
WARNING: Improper installation, adjustment,
alteration, service or maintenance can cause
injury or property damage. Refer to this manual.
For assistance or additional information consult
a qualified installer, service agency or the
gas supplier.
This appliance may be installed in an aftermarket,*
permanently located, manufactured home (USA
only) or mobile home, where not prohibited by
local codes.
This appliance is for use only with the type of gas
indicated on the rating plate. This appliance is
not convertible for use with other gases, unless
a certied kit is used.
* Aftermarket: Completion of sale, not for purpose of resale, from
the manufacturer.
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly
could result in serious injury, death or
property damage.
DANGER
HOT GLASS WILL
CAUSE BURNS.
DO NOT TOUCH GLASS
UNTIL COOLED.
NEVER ALLOW CHILDREN
TO TOUCH GLASS.
Un panneau vitré chaud peut
causer des brûlures.
Laissez refroidir le panneau
vitréavant d’y toucher.
Ne laisser jamais les enfants
toucher le panneau vitré.
A barrier designed to reduce the risk of burns from
the hot viewing glass is provided with this
appliance and shall be installed.
Une barrière visant à réduire le risque de brûlure
par le hublot chaude est fournie avec cet
appareil et doit être installé.
DANGER
CERTIFIED
S
AFETYBARRIER

220306749
LX Series Direct Vent Gas Fireplace
Important Safety Information .....................................3
Code Approval..................................................................4
Product Features..............................................................5
High Elevations ................................................................5
Gas Pressures..................................................................5
Gas Specications & Orice Size.....................................5
Fireplace & Framing Dimensions...............................6
Pre-Installation Information........................................7
Before You Start ...............................................................7
Fireplace Framing ............................................................7
Fireplace Location............................................................8
Clearances .......................................................................9
Secure Fireplace to Floor or Framing.............................10
Finishing Material ...........................................................10
Venting Installation.................................................... 11
Optional Top Vent Application......................................... 11
Installation Precautions ..................................................12
Installation Clearances for Vent Pipe .............................13
Installation Planning .......................................................14
Horizontal Termination....................................................14
Vertical Termination ........................................................14
General Information - Termination Location ...................15
How to Use the Vent Graph............................................16
Rear Wall Vent Installation .............................................17
Horizontal (Through the Wall) Termination ....................18
Below Grade Installation ................................................20
Vertical Through-the-Roof Installation ............................20
Installation for Vertical Termination.................................21
Fireplace Installation.................................................23
Check Gas Type.............................................................23
Install Gas Piping ...........................................................23
Checking Gas Pressure .................................................25
Electrical Installation.......................................................25
Electrical Wiring..............................................................25
Remote Wall Switch .......................................................26
Glass Removal...............................................................27
Log Placement ...............................................................27
Air Restrictor Adjustment................................................31
Safety Barrier Installation ...............................................32
Facing Installation ..........................................................33
Operating Instructions..............................................34
What To Do If You Smell Gas .........................................34
Lighting Pilot for the First Time.......................................34
Lighting Pilot...................................................................35
Lighting Burner...............................................................36
To Turn Off Gas ..............................................................36
Cleaning and Maintenance .......................................37
Venting System ..............................................................37
Cleaning Glass...............................................................37
Pilot and Burner Flames.................................................37
Firebox Cleaning ............................................................37
Glass Replacement........................................................38
Blower..........................................................................37
Troubleshooting .........................................................39
Replacement Parts .....................................................40
Optional Accessories.................................................42
Venting Components..................................................43
Massachusetts Residents Only.................................46
Warranty ......................................................................47
Efciencies..................................................................48
Congratulations!
You have purchased a state-of-the-art gas appliance featuring the Lex-Fire® Burn System available
exclusively on Vermont Castings Group gas appliances.
The Lex-Fire® Burn System sets a new standard for ame appearance through innovative log design, burner
technology and ember placement. Each element affecting combustion and ame appearance was carefully
scrutinized and strategically balanced during the design process.

20306749 3
LX Series Direct Vent Gas Fireplace
4. Never install the replace
• in a recreational vehicle
• where curtains, furniture, clothing, or other am-
mable objects are less than 42" from the front, top,
or sides of the replace
• in high trafc areas
• in windy or drafty areas
5. This replace reaches high temperatures. Keep chil-
dren and adults away from hot surfaces to avoid burns
or clothing ignition. Fireplace will remain hot for a time
after shutdown. Allow surfaces to cool before touch-
ing.
6. Young children should be carefully supervised when
they are in the same room as the appliance. Toddlers,
young children and others may be susceptible to
accidental contact burns. A physical barrier is recom-
mended if there are at risk individuals in the house. To
restrict access to a replace or stove, install an adjust-
able safety gate to keep toddlers, young children and
other at risk individuals out of the room and away from
hot surfaces.
7. Do not modify replace under any circumstances. Any
parts removed for servicing must be replaced prior to
operating replace.
8. Turn replace off and let cool before servicing, install-
ing, or repairing. Only a qualied service person should
install, service, or repair the replace. Have burner
system inspected annually by a qualified service
person.
9. You must keep control compartments, burners, and
circulating air passages clean. More frequent cleaning
may be needed due to excessive lint and dust from
carpeting, bedding material, pet hair, etc. Turn off the
gas valve and pilot light before cleaning replace.
10. Have venting system inspected annually by a quali-
ed service person. If needed, have venting system
cleaned or repaired. See Cleaning and Maintenance,
Page 37.
IMPORTANT SAFETY INFORMATION
This replace is a vented product. This replace must be
properly installed by a qualied service person. The glass
door must be properly seated and sealed. If this unit is not
properly installed by a qualied service person with glass
door properly seated and sealed, combustion leakage
can occur.
CARBON MONOXIDE POISONING: Early signs of carbon
monoxide poisoning are similar to the u with headaches,
dizziness and/or nausea. If you have these signs, the re-
place may not have been installed properly. Get fresh air
at once! Have the replace inspected and serviced by a
qualied service person. Some people are more affected
by carbon monoxide than others. These include pregnant
women, people with heart or lung disease or anemia,
those under the inuence of alcohol, and those at high
altitudes.
Propane/LP gas and natural gas are both odorless. An
odor-making agent is added to each of these gases. The
odor helps you detect a gas leak. However, the odor added
to these gases can fade. Gas may be present even though
no odor exists.
Make certain you read and understand all warnings. Keep
this manual for reference. It is your guide to safe and proper
operation of this replace.
1. 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 certied
kit is used.
2. For propane/LP replace, do not place propane/LP
supply tank(s) inside any structure. Locate propane/
LP supply tank(s) outdoors. To prevent performance
problems, do not use propane/LP fuel tank of less than
100 lbs. capacity.
3. If you smell gas
•shut off gas supply.
• do not try to light any appliance.
• do not touch any electrical switch; do not use any
phone in your building .
• immediately call your gas supplier from a neigh-
bor’s phone. Follow the gas supplier’s instruc-
tions.
INSTALLER
Please leave these instructions with the appliance.
OWNER
Please retain these instructions for future reference .
• Read this owner’s manual carefully and completely before trying to assemble, operate,
or service this replace.
• Any change to this replace or its controls can be dangerous.
• Improper installation or use of this replace can cause serious injury or death from
re, burns, explosions, electrical shock and carbon monoxide poisoning.
WARNING

420306749
LX Series Direct Vent Gas Fireplace
11. Keep the area around your replace clear of combus-
tible materials, gasoline, and other ammable vapor
and liquids. Do not run replace where these are used
or stored. Do not place items such as clothing or deco-
rations on or around replace.
12. Do not use this replace to cook food or burn paper or
other objects.
13. Never place anything on top of replace.
14. Do not use any solid fuels (wood, coal, paper, card-
board, etc.) in this replace. Use only the gas type
indicated on rating plate.
15. This 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, or the Canadian Electrical Code,
CSA C22.1.
16. Do not obstruct the ow of combustion and ventilation
air in any way. Provide adequate clearances around
air openings into the combustion chamber along with
adequate accessibility clearance for servicing and
proper operation.
17. When the appliance is installed directly on carpeting,
tile or other combustible material other than wood
ooring, you must set appliance on a metal or wood
panel or hearth pad extending the full width and depth
of the appliance.
18. Do not use replace if any part has been exposed to
or under water. Immediately call a qualied service
person to arrange for replacement of the unit.
19. Do not operate replace if any log is broken.
20. Do not use a blower insert, heat exchanger insert, or
any other accessory not approved for use with this
replace.
21. Do not operate the replace with glass door removed,
cracked, or broken.
22. For Massachusetts Residents Only: This product
must be installed by a licensed plumber or gas tter
when installed within the Commonwealth of Massa-
chusetts. Flexline installation must not exceed 36".
CODE APPROVAL
Direct Vent type appliances draw all combustion air from
outside of the dwelling through the vent pipe.
These appliances have been tested by CSA and found to
comply with the established standards for DIRECT VENT
GAS FIREPLACE HEATERS in the USA and Canada as
follows:
LISTED VENTED GAS FIREPLACE HEATER
TESTED TO:
ANSI Z21.88-2104 / CSA 2.33-2014 STANDARDS
IMPORTANT SAFETY INFORMATION
WARNING
Never connect unit to private (non-utility)
gas wells. This gas is commonly known
as wellhead gas.
IMPORTANT:
PLEASE READ THE FOLLOWING
CAREFULLY
It is normal for replaces fabricated of steel to give off
some expansion and/or contraction noises during the
start up or cool down cycle. Similar noises are found
with your furnace heat exchanger or car engine.
IMPORTANT:
PLEASE READ THE FOLLOWING
CAREFULLY
It is not unusual for gas replace to give off some
odor the rst time it is burned. This is due to the
manufacturing process.
Please ensure that your room is well
ventilated during burn off — open all
windows.
It is recommended that you burn your replace for
at least ten (10) hours the rst time you use it. Place
the fan switch in the “OFF” position during this time.
Nous recommandons que nos
appareils de chauffage au gaz
soient installés et entretenus par
des professionnels qui ont été
accrédités aux È.U. par le National
Fireplace Institute ® (NFI) comme
étant des spécialistes du NFI en
matièred’appareils de chauffage
au gaz.
DANGER
HOT GLASS WILL
CAUSE BURNS.
DO NOT TOUCH GLASS
UNTIL COOLED.
NEVER ALLOW CHILDREN
TO TOUCH GLASS.
Un panneau vitré chaud peut
causer des brûlures.
Laissez refroidir le panneau
vitréavant d’y toucher.
Ne laisser jamais les enfants
toucher le panneau vitré.
A barrier designed to reduce the risk of burns from
the hot viewing glass is provided with this
appliance and shall be installed.
Une barrière visant à réduire le risque de brûlure
par le hublot chaude est fournie avec cet
appareil et doit être installé.
DANGER

20306749 5
LX Series Direct Vent Gas Fireplace
PRE-INSTALLATION INFORMATION
•This appliance has been certified for use with
either natural or propane gas. See appropriate data
plates.
•This appliance is not for use with solid fuels.
•The appliance is approved for bedroom or bedsitting
room installations.
•The appliance must be installed in accordance with
local codes if any. If none exist use the current instal-
lation code. ANSI Z223.1/NFPA 54 in the USA, CSA
B149 in Canada.
•This appliance is mobile home approved.
•The appliance must be properly connected to a vent-
ing system.
PRODUCT SPECIFICATIONS
OFF
FP2710
LX controls
Off/Pilot/On
Knob
Optional Remote
Receiver
Figure 1 -
LXDV Fireplace Controls
Hi/Lo Knob
Blower Control
On/Off/
RS Switch
FP2710
GAS PRESSURES
HIGH ELEVATIONS
Input ratings are shown in BTU per hour and are certi-
ed without deration for elevations up to 4,500 feet
(1,370 m) above sea level.
For elevations above 4,500 feet (1,370 m) in USA,
installations must be in accordance with the current
ANSI Z223.1/NFPA 54 and/or local codes having
jurisdiction.
In Canada, please consult provincial and/or local
authorities having jurisdiction for installations at eleva-
tions above 4,500 feet (1,370 m).
Natural Propane (LP)
Inlet Minimum 4.5” w.c. 11.0” w.c.
Inlet Maximum 10.5” w.c. 13.0” w.c.
Manifold Pressure 3.5” w.c. 10.0” w.c.
Max.Input Min. Input Orice Size
Model Fuel BTU/h BTU/h Front Rear
LX32NV Nat. 36,000 26,000 #46 #43
LX32PV LP 36,000 22,000 3/64" #55
LX36NV Nat. 44,000 30,000 #41 #38
LX36PV LP 44,000 32,000 #55 #53
GAS SPECIFICATIONS & ORIFICE SIZE

620306749
LX Series Direct Vent Gas Fireplace PRE-INSTALLATION INFORMATION
FIREPLACE and FRAMING DIMENSIONS
Figure 2 -
LX32 Fireplace & Framing Dimensions
Figure 3 -
LX36 Fireplace & Framing Dimensions
39
3
8
"
1000mm
40
1
2
"
1029mm
23
5
8
"
599mm
31
7
8
"
810mm
Minimum
7
8
"
22mm
for Proper
Door
Operation
47
5
8
"
1210mm
Min. Rough
Opening
Height
46
1
2
"
1180mm
35
3
4
"
910mm
9
7
8
"
249mm
12
5
8
"
321mm
7"
177mm
2
3
4
"
71mm
18
7
8
"
480mm
10
1
8
"
258mm
20
1
4
"
515mm
24"
610mm
Min. Rough
Opening
Depth
41
3
4
"
1059mm
Min. Rough opening Width
1
2
"
13mm
23
1
2
"
597mm
39
5
8
"
1006mm
33
1
4
"
845mm
47"
1195mm
47"
1195mm
66
1
2
"
1690mm
LX32 Dims
LX36 Dims
23
5
33
3
4
40
1
2
43
1
2
5
12
1
24
3
45
3
4
1
2
23
1
2
1
2
12
5
2
3
4
35
5
5
1
1

20306749 7
LX Series Direct Vent Gas Fireplace
BEFORE YOU START
Read this homeowner manual thoroughly and follow all
instructions carefully. Inspect all contents for shipping
damage and immediately inform your dealer if any damage
is found. Do not install any unit with damaged, incomplete,
or substitute parts. Check your packing list to verify that
all listed parts have been received. You should have the
following:
•Fireplace (Firebox and Burner System)
•Log Set
• Propane Conversion Kit
•Rock Wool
• Deector Shield (to be used with Duravent Horizontal
Termination – P/N 985)
ITEMS REQUIRED FOR INSTALLATION
Tools and Building Supplies:
•Phillips Screwdriver •Hammer
•Saw and/or saber saw •Level
•Measuring Tape •Pipe Wrench
•Electric Drill and Bits •Tee Joint
•Pliers •Square
•Framing Materials •Wall Finishing Materials
•Piping Complying with Local Codes
•Caulking Material (Noncombustible)
•Fireplace Surround Material (Noncombustible)
•Pipe Sealant Approved for use with Propane/LPG
(Resistant to Sulfur Compounds)
WARNING
The 1" standoffs on back and sides and 6"
standoffs on top of replace are designed
to separate replace from framing. These
standoffs may contact framing but no
material may be placed between standoff
and side of replace.
PRE-INSTALLATION INFORMATION
FIREPLACE FRAMING
Firebox framing can be built before or after the appliance
is set in place. Construct rebox framing following Figure
2 or 3. The framing headers may rest on the top of the
rebox standoffs.
The rebox may be installed directly on a combustible oor
or raised on a platform of an appropriate height. When
the rebox is installed directly on carpeting, tile, or other
combustible material, other than wood ooring, the rebox
shall be installed on a metal or wood panel extending the
full width and depth of the enclosure.
To access control door, build a platform to make the
bottom of appliance equal to or higher than top of nished
hearth extension, or elevate unit a minimum of 7/8" above
suboor.
WARNING
Do not fill spaces around firebox with
insulation or other materials. This could
cause a re.
Fireplace must be raised minimum 7/8" to
allow door to open.
NOTE

820306749
LX Series Direct Vent Gas Fireplace PRE-INSTALLATION INFORMATION
FIREPLACE LOCATION
Plan for the installation of your appliance. This includes
determining where the unit is to be installed, the vent con-
guration to be used, framing and nishing details, and
whether any optional accessories (i.e. blower, wall switch,
or remote control) are desired. Consult your local building
code agency to ensure compliance with local codes, includ-
ing permits and inspections.
The following factors should be taken into consideration:
•Clearance to side-wall, ceiling, woodwork, and windows.
Minimum clearances to combustibles must be main-
tained.
• This replace may be installed along a wall, across a
corner, or use an exterior chase. Refer to Figure 4 for
suggested locations.
• Location should be out of high trafc areas and away
from furniture and draperies due to heat from appli-
ance.
• Never obstruct the front opening of the replace.
• Do not install in the vicinity where gasoline or other
ammable liquids may be stored.
• Vent pipe routing. See VENTING section found in this
manual for allowable venting congurations.
• These units can be installed in a bedroom. See National
Fuel Gas Code ANSI Z233.1/NFPA 54 — (current
edition), the Uniform Mechanical Code — (current edi-
tion), and Local Building Codes for specic installation
requirements.
Y
EAB
C
D
F
YB
X
LU584-1
Locating unit
2/4/99 djt
Figure 4 -
Locating Gas Fireplace
** Island (C) and room divider (D) installation is possible as long
as the horizontal portion of vent system (X) does not exceed
20'. See Installing Horizontal Termination Conguration on
Pages 20 and 21.
* When you install your replace in (D) room divider or (E)
at on wall corner positions (Y), a minimum of 6" clearance
must be maintained from perpendicular wall and front of
replace.
A Flat on Wall
B Cross Corner
C Island**
D Room Divider*
E Flat on Wall Corner*
F Chase Installation
Y 9" Minimum

20306749 9
LX Series Direct Vent Gas Fireplace
PRE-INSTALLATION INFORMATION
CLEARANCES TO COMBUSTIBLES
Follow these instructions carefully to ensure safe installation. Failure to
follow instructions exactly can create a re hazard.
The appliance cannot be installed on a carpet, tile or other combustible
material other than wood ooring. If installed on carpet or vinyl ooring, the
appliance shall be installed on a metal, wood or noncombustible material
panel extending full width and depth of the appliance.
WARNING
12” (305 mm)
Max. Depth
9” (229 mm)
Minimum
LX32 - 39” (991 mm)
LX36 - 43” (1092 mm)
LX32 - 30” (762 mm)
LX36 - 34” (864 mm)
6”
(152 mm)
12” (305 mm)
Minimum
46³⁄₄”
(1187 mm)
44³⁄₄”
(1137 mm)
FP2711
combustible clearances
Side Wall
Ceiling
Combustible
Mantel
Noncombus-
tible Facing
FP2711
Figure 5 -
Clearances to Combustible
Materials
MANTEL CLEARANCES
NOTE: The combustible area above the facing must
not protrude more than 3/4" from the facing. If it does,
it is considered a mantel and must meet the mantel
requirements listed in this manual.
HEARTH REQUIREMENTS
The replace must be installed on a non-combustible hearth
extending a minimum of 12" from the replace opening
(local codes may require a larger hearth). The hearth must
also extend to both sides of the face (see the table above
for the exact width of the face).

10 20306749
LX Series Direct Vent Gas Fireplace
The replace must be secured to the oor and/or to framing studs as shown in Figure 6. Use two
(2) wood screws or masonry/ concrete screws to secure replace to the oor. Use four (4) screws
to attach replace to framing. The side brackets are adjustable from 1/2" to 5/8" to accommodate
different thickness of noncombustible material.
PRE-INSTALLATION INFORMATION
NOTE: Do not allow combustibles (drywall) to touch top and side edges of black-painted metal
face of replace. Only use noncombustibles. A 4" wide or more cement board may touch the
top and side edges of black-painted metal face of replace.
Do not allow any combustible to overlap the black-painted face of replace.
OFF
FP2712
secure fireplaces
Figure 6 -
Securing Fireplace to Floor and Framing Studs
Framing
Framing
Adjustable
Bracket
Adjustable
Bracket
Screws
Screws
Screws
FP2712
FINISHING MATERIAL
NOTE: Any remote wiring (i.e. remote control, wall switch, and optional fan) must be done prior to
nal nishing to avoid costly reconstruction.
Only noncombustible materials (i.e. brick, tile, slate, steel, or other materials with a UL re rating
of Zero) may be used to cover the black surface of the appliance. A 300°F minimum adhesive may
be used to attach facing materials to the black surface. If joints between the nished wall and the
replace surround are sealed, a 300°F minimum sealant material (General Electric RTV103 or
equivalent) must be used.
WARNING
Never obstruct or modify the air inlet or
outlet grills (louvers). This may create a
re hazard.

20306749 11
LX Series Direct Vent Gas Fireplace
VENTING INSTALLATION
OPTIONAL TOP VENT APPLICATION
The appliance is shipped as a rear vent unit. If the installa-
tion layout requires the unit to be a top vent conguration
the appliance can be converted by the following steps.
When removing and retting the plates and adapter be
sure the associated gaskets are undamaged and retted
as required.
1. Remove the eight (8) screws securing the ue pipe
adapter to the replace body. Figure 7
2. Set the ue pipe adapter aside, complete with the
gasket. Do not damage the gaskets as the adapter and
gasket must be retted.
3. Remove the eight (8) screws securing the ue pipe cover
to the top of the intake box and remove the cover and
gasket. Figure 7
WARNING
FP1991
remove screws
Flue Pipe
Cover
Flue Pipe
Adapter
Screws
FP1991
Figure 7 -
Remove 16 Screws from Flue Pipe
Adapter and Flue Pipe Cover
4. Remove eight (8) screws securing the ue pipe to the
back of the intake box and remove the pipe and gasket.
Figure 8
5. Replace ue pipe to top of rebox. Ensure the gasket is
in place and undamaged. Secure with eight (8) screws.
Figure 9
6. Place the ue pipe cover and gasket removed in step
3 over the ue opening in bottom of the intake box.
After conversion to top vent conguration
the 4" (102 mm) flue pipe should be
concentric within the 65⁄8" (175 mm) outer
collar (within 1/4").
Figure 8 -
Remove Flue Pipe
FP1992
remove flue pipe
Screws
Flue Cover
Flue Pipe
FP1992
FP1993
attach flue pipe
Figure 9 -
Attach Flue Pipe to Top
Vent Congurations
Flue Pipe
Screws
FP1993
7. Ret the ue pipe adapter and gasket to the top of re-
place. Secure the adapter with eight (8) screws removed
in Step 1.

12 20306749
LX Series Direct Vent Gas Fireplace
INSTALLATION PRECAUTIONS
Consult local building codes before beginning
the installation. The installer must make
sure to select the proper vent system for
installation. Before installing vent kit, the
installer must read this replace manual and
vent kit instructions.
Only a qualied installer/service person should
install venting system. The installer must follow
these safety rules:
•Wear gloves and safety glasses for protec-
tion.
• Use extreme caution when using ladders
or when on rooftops.
• Be aware of electrical wiring locations in
walls and ceilings.
The following actions will void the warranty on
your venting system:
• Installation of any damaged venting com-
ponent.
• Unauthorized modication of the venting
system.
• Installation of any component part not
manufactured or approved by Vermont
Castings Group.
• Installation other than permitted by these
instructions.
VENTING INSTALLATION
Read all instructions completely and
thoroughly before attempting installation.
Failure to do so could result in serious
injury, property damage or loss of life.
Operation of improperly installed and
maintained venting system could result in
serious injury, property damage or loss of
life.
WARNING
NOTICE
Failure to follow these instructions will
void the warranty.
This replace must be vented to the outside.
The venting system must NEVER be attached
to a chimney serving a separate solid fuel
burning appliance. Each gas appliance must
use a separate vent system. Do not use
common vent systems.
WARNING
COMBUSTIBLE CLEARANCES FOR VENT
PIPE
WARNING
Horizontal sections of this vent system
require a minimum of 3" clearances to
combustibles at the top of the ue and 1"
clearance at the sides and bottom until
the flue penetrates the outside wall. A
minimum 1" clearance all around the ue is
acceptable at this point of penetration.
Vertical sections of this vent system require
a minimum of 1" clearance to combustibles
on all sides of the pipe.
* A minimum of 3" clearance to the top is required along
horizontal length until ue pipe penetrates outside wall.
** A minimum 1" clearance to combustibles permitted all
around ue at outside wall
1"
*3"
**1"
**1"
35⁷⁄₈”
(911 mm)
FP2713
vent clearance
Figure 10 -
Combustible Clearances for Vent Pipe
FP2713

20306749 13
LX Series Direct Vent Gas Fireplace
INSTALLATION PLANNING
There are two basic types of direct-vent installation:
• Horizontal Termination
•Vertical Termination
It is important to select the proper length of vent pipe for
the type of termination you choose. It is also important to
note the wall thickness.
FOR HORIZONTAL TERMINATION
Select the amount of vertical rise desired. All horizontal
run of venting must have minimum 1/4" rise for every 12"
of run towards the termination.
You may use up to three 90° elbows in this vent congura-
tion. Refer to Horizontal (Through the Wall) Termination
Congurations on Page 18.
FOR VERTICAL TERMINATION
Measure the distance from the replace oor to the ceil-
ing. Add the ceiling thickness, the vertical rise in an attic
or second story, and allow for sufcient vent height above
the roof line.
NOTE: You may use two 45° elbows in place of a 90° elbow.
You must follow rise to run ratios when using 45° elbows.
The appliance is approved for use with three 90° elbows
maximum or a combination of 90° and 45° elbows up to
a maximum of 270°.
For two-story applications, restops are required at each
oor level. If an offset is needed in the attic, additional pipe
and elbows will be required.
You may use a chase with a vent termination with exposed
pipe on the exterior of the house. See Installing Vent
System in a Chase below. If pipe is enclosed in chase, it
is not exposed.
It is very important that the venting system maintain its bal-
ance between the combustion air intake and the ue gas
exhaust. Certain limitations apply to vent congurations
and must be strictly followed.
VENTING INSTALLATION
WARNING
Never run the vent pipe level or downward.
This may cause excessive temperatures
which could cause a re.
NOTICE
When installing in a chase, you should
insulate the chase as you would the outside
walls of your home. This is especially
important in cold climates. Insulation
should be considered a combustible
material. Maintain proper clearances to all
combustible materials.
NOTICE
Treatment of restops and construction of
the chase may vary from building type to
building type. These instructions are not
substitutes for the requirements of local
building codes. You must follow all local
building codes.
Always maintain minimum clearances
around vent systems. The minimum
clearances to combustibles for horizontal
vent pipe are 3" at the top and 1" at the
sides and bottom of the vent system until
the pipe penetrates the nearest vertical wall.
A 1" minimum clearance all around the pipe
must be maintained. Do not pack the open
air spaces with insulation or other materials.
This could cause high temperatures and
may present a re hazard.
WARNING
INSTALLING A VENT SYSTEM IN AN
OUTSIDE CHASE
A chase is a vertical boxlike structure built to enclose
venting that runs along the outside of a building. A chase
is required for such venting.

14 20306749
LX Series Direct Vent Gas Fireplace VENTING INSTALLATION
V
X
X
X
D
E
B
B
B
C
B
M
B
A
J
K
F
L
VENT TERMINATION AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED
H
I
Fixed
Closed
Operable
Operable Fixed
Closed
B
CFM145a
DV Termin Location
5/01/01 Rev. 12/05/01
sta
INSIDE
CORNER DETAIL
A
G
CFM145a
V
V
V
VV
V
V
V
TERMINATION LOCATION
1 In accordance with the current CSA-B149 Installation Codes
2 In accordance with the current ANSI Z223.1/NFPA 54 National Fuel
Gas Codes
† A vent shall not terminate directly above a sidewalk or paved
driveway which is located between two single family dwellings and
serves both dwellings
‡ Only permitted if veranda, porch, deck or balcony is fully open on a
minimum 2 sides beneath the oor.
NOTE: 1. Local codes or regulations may require different
clearances.
2. The special venting system used on Direct Vent
Fireplaces are certied as part of the appliance, with
clearances tested and approved by the listing agency.
3. Vermont Castings Group assumes no responsibility for
the improper performance of the appliance when the venting
system does not meet these requirements.
Termination Locations
CANADIAN INSTALLATIONS1US INSTALLATIONS2
A = Clearance above grade, veranda, porch,
deck or balcony
12" (30cm) 12" (30cm)
B = Clearance to window or door that may be
opened
6" (15cm) for appliances <10,000 BTU/h
(3kW)
12" (30cm) for appliances >10,000 BTU/h
(3kW) and <100,000 BTU/h (30kW)
36" (91cm) for appliances >100,000 BTU/h
(30kW)
6" (15cm) for appliances <10,000 BTU/h
(3kW)
9" (23cm) for appliances >10,000 BTU/h
(3kW) and <50,000 BTU/h (15kW)
12" (30cm) for appliances >50,000 BTU/h
(15kW)
C = Clearance to permanently closed window 12" (305mm) recommended to prevent
window condensation
12" (305mm) recommended to prevent win-
dow condensation
D = Vertical clearance to ventilated soft locat-
ed above the terminal within a horizontal
distance of 2' (610 mm) from the center
line of the terminal
18" (458mm) 18" (458mm)
E = Clearance to unventilated soft 12" (305mm) 12" (305mm)
F = Clearance to outside corner see next page see next page
G = Clearance to inside corner see next page see next page
H = Clearance to each inside of center line
extended above meter/regulator assembly
3' (91cm) within a height of 15' (5m) above
the meter/regulator assembly
3' (91cm) within a height of 15' (5m) above
the meter/regulator assembly
I = Clearance to service regulator vent outlet 3' (91cm) 3' (91cm)
J = Clearance to non-mechanical air supply
inlet to building or the combustion air inlet
to any other appliance
6" (15cm) for appliances <10,000 BTU/h
(3kW)
12" (30cm) for appliances >10,000 BTU/h
(3kW) and <100,000 BTU/h (30kW)
36" (91cm) for appliances >100,000 BTU/h
(30kW)
6" (15cm) for appliances <10,000 BTU/h
(3kW)
9" (23cm) for appliances >10,000 BTU/h
(3kW) and <50,000 BTU/h (15kW)
12" (30cm) for appliances >50,000 BTU/h
(15kW)
K = Clearance to mechanical air supply inlet 6' (1.83m) 3' (91cm) above if within 10' (3m) horizontally
L = Clearance above paved sidewalk or
paved driveway located on public property
7' (2.13m)†7' (2.13m)†
M = Clearance under veranda, porch, deck or
balcony
12" (30cm)‡12" (30cm)‡

20306749 15
LX Series Direct Vent Gas Fireplace
40
38
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
6
4
2
2 4 6 8 10 1214 16 1820
eg: A
FP2714
sidewall vent graph
HOW TO USE THE VENT GRAPH
The Vent Graph should be read in conjunction with the
following vent installation instructions to determine the
relationship between the vertical and horizontal dimensions
of the vent system.
1. Determine the height of the center of the horizontal vent
pipe exiting through the outer wall. Using this dimension
on the Sidewall Vent Graph, locate the point intersecting
with the slanted graph line.
2. From the point of this intersection, draw a vertical line
to the bottom of the graph.
3. Select the indicated dimension, and position the re-
place in accordance with same.
Example: If the vertical dimension from the oor of the
replace is 11' (3.4 m) the horizontal run to the face of
the outer wall must not exceed 14' (4.3 m).
Example: If the vertical dimension from the oor of the
unit is 7’ (2.14 m), the horizontal run to the face of the
outer wall must not exceed 81⁄2' (2.6 m).
Sidewall Vent Graph showing the relationship between
vertical and horizontal dimensions for a Direct Vent ue
system. Figure 13 -
Rear Wall Venting Graph
Horizontal Dimension From the Outside Face of the Wall
to the Back of the Fireplace
Vertical Dimension From the Floor of Unit to the Center of the
Horizontal Vent Pipe
Dimensions in
Feet
VENTING INSTALLATION
Outside Corner
Inside Corner
Termination Clearances
Termination clearances for buildings with combustible and noncombustible exteriors.
G =
Combustible
6" (152 mm)
Noncombustible
2" (51 mm)
F =
Combustible
6" (152 mm)
Noncombustible
2" (51 mm)
G
Balcony -
with no side wall
M =
Combustible &
Noncombustible
12" (305 mm)
M
Balcony -
with perpendicular side wall
M = 12" (305 mm)
P = 6” (152 mm)
M
F
Alcove Applications*
C
D
C
E
V
V
Combustible &
Noncombustible
E= Min. 2” (51 mm) for
non-vinyl sidewalls
Min. 12” (305 mm) for
vinyl sidewalls
O= 8’ (2.4 m) Min.
O
P
V
V
V
Figure 12 -
Allowable
Venting
584-15
No.
of Caps DMin. CMax.
1 3’ (914 mm) 2 x DActual
2 6’ (1.8 m) 1 x DActual
3 9’ (2.7 m) 2/3 x DActual
4 12’ (3.7 m) 1/2 x DActual
DMin. = # of Termination caps x 3
CMax. = (2 / # termination caps) x DActual
*NOTE: Termination in an alcove space (spaces open only on one side and with an overhang) is permitted with the dimensions specied for vinyl or
non-vinyl siding and softs. 1. There must be a 3’ (914 mm) minimum between termination caps. 2. All mechanical air intakes within 10’ (1 m) of a
termination cap must be a minimum of 3’ (914 mm) below the termination cap. 3. All gravity air intakes within 3’ (914 mm) of a termination cap must
be a minimum of 1’ (305 mm) below the termination cap.

16 20306749
LX Series Direct Vent Gas Fireplace VENTING INSTALLATION
REAR WALL VENT INSTALLATION
When installed as a rear vent unit this appliance may be
vented directly to a termination located on the rear outside
termination behind the appliance
•45° elbows may only be attached to rear when used to
direct the ue skyward (to achieve additional rise). Do
not attach 45° elbows to rear of appliance in which the
ue turns either left or right and terminates horizontal.
• The maximum horizontal distance between the rear
of the appliance and the outside face of the outside
termination is 20" (508 m). Figure 14
FP1188
rear wall install
20”
(508 mm)
Max.
20”
(508 mm)
Max.
Figure 14 -
Rear Vent Application,
Maximum Horizontal Distance
FP1188
1. Locate and cut the vent opening in the wall. For com-
bustible walls rst frame in opening. Figure 15
Combustible Walls: Cut a 111⁄2"H x 91⁄2" W (292 x 24
mm) hole through the exterior wall and frame as shown.
Figure 15
Noncombustible Walls: Hole opening should be 71⁄2"
(190 mm) in diameter.
VO584-100
Vent Opening
2/99 djt
91⁄2"
(241 mm)
111⁄2"
(292 mm)
Vent Opening for Combustible Walls
Fireplace Hearth Framing Detail
Vent Opening for Noncombustible Wall
71⁄2"
(190 mm)
Fireplace Hearth VO584-100
Figure 15 -
Locate Vent Opening on Wall
FP1953
rigid pipe
Figure 16 -
Rigid Vent Pipe Connections
NOTE: Horizontal runs of
vent must be supported
every 3' (914 mm). Use wall
straps for this purpose.
Female
Locking Lugs
Male Slots
FP1953
2. Rigid vent pipes and ttings have special twist-lock
connections. Assemble the desired combination of pipe
and elbows to the appliance adaptor with pipe seams
oriented towards the wall or oor.
Twist-lock Procedure: The female ends of the pipes
and ttings have three locking lugs (indentations).
These lugs will slide straight into matching slots on
the male end of adjacent pipes and ttings. Push the
pipe sections together and twist one section clockwise
approximately one-quarter turn until the sections are
fully locked. Figure 16
3. Attach vent pipe assembly to the replace. Set replace
in front of its permanent location to insure minimum
clearances. Mark the wall for a 111⁄2"H x 91⁄2"W (292 x 24
mm) rectangle hole (for noncombustible material such
as masonry block or concrete, a 71⁄2" [190 mm] diameter
hole is acceptable). Figure 15. The center of the hole
should line up with the center line of the horizontal rigid
vent pipe end. Be sure to allow for minimum rise. Cut
a 111⁄2" x 91⁄2" (292 X 241 mm) rectangle hole through
combustible exterior wall (71⁄2" [190 mm] diameter hole
if noncombustible). Frame as necessary. Allow 1⁄4" min-
imum rise per foot. Figure 15
4. Apply a bead of non-hardening mastic around the
outside edge of vent cap. Position the vent cap in the
center of hole on the exterior wall with the word “UP”
on the vent cap facing up. Insure proper clearance of
1" to combustibles is maintained. Attach the vent cap
with four wood screws supplied. Figure 17
NOTE: Replace the wood screws with appropriate fasteners
for stucco, brick, concrete, or other types of siding.
WARNING
Do not recess vent termination into any
wall. This will cause a re hazard.

20306749 17
LX Series Direct Vent Gas Fireplace
VENTING INSTALLATION
HOT
FP2715
horiz cap w shield
Figure 17 -
Installing Horizontal Vent Cap
Vent Cap
Apply Mastic to
All Four Sides
Deecting Shield
Wood Screw
FP2715
For vinyl siding, stucco, or wood exterior use vinyl siding
standoffs between vent cap and exterior wall. The vinyl
siding standoff prevents excessive heat from melting the
vinyl siding material. Bolt the vent cap to the standoff. Apply
non-hardening mastic around outside edge of the standoff
instead of the vent cap assembly. Use wood screws pro-
vided to attach the standoff. Figure 18
HOT
Fp2716
vinyl siding standoff
Figure 18 -
Install Vinyl Siding Standoff
Apply Mastic to
All Four Sides
Cut Vinyl Siding Away
to Fit Standoff
Wood Screw
Vent
Cap
Screw
Standoff
Deecting Shield
FP2716
FP1957
install firestop
Figure 19 -
Connect Vent Cap with Horizontal Vent Pipe
Interior Wall
Surface
Fire Stop
Assembly
Horizontal
Vent Pipe
Screw
Vent Cap
(Horizontal
Termination)
FP1957
HORIZONTAL (THROUGH THE WALL) TER-
MINATION CONFIGURATIONS
Since it is very important that the venting system main-
tain its balance between the combustion air intake and
the ue gas exhaust, certain limitations as to vent con-
gurations apply and must be strictly adhered to.
The Vent Graph, showing the relationship between vertical
and horizontal side wall venting, will help to determine the
various dimensions allowable. Refer to Page 16
Minimum clearance between vent pipes and combus-
tible materials is 3" on top and 1" from bottom and
sides unless otherwise noted.
When vent termination exits through foundations less than
20" below siding outcrop, the vent pipe must ush up with
the siding.
It is best to locate the replace in such a way that minimizes
the number of offsets and horizontal vent length.
WARNING
When installing the appliance as a rear
vent unit, the 90°, 45° transition elbow
attached directly to the rear of the unit is
NOT INCLUDED in the following criteria
and calculations, and unless specically
mentioned should be ignored when
calculating venting layouts.
The horizontal vent run refers to the total length of vent pipe
from the ue collar of the replace (or the top of the Transition
Elbow) to the face of the outer wall.
•The maximum number of 90° elbows per side wall instal-
lation is three (3). Figure 20
• If a 90° elbow is tted directly on top of the replace ange
the maximum horizontal vent run before the termination
or a vertical rise is 36” (914 mm). Figure 21
• If a 90° elbow is used in the horizontal vent run (level
height maintained) the horizontal vent length is reduced
by 36" (914 mm). This does not apply if the 90° elbows
are used to increase or redirect a vertical rise. Figure 23
5. Slide re stop over the vent pipe before connecting the
horizontal run to the vent cap. Figure 19
6. The pipe overlap should be a minimum of 11⁄4". Apply
silicone to the outer pipe connection. Fasten all vent
connections with screws provided.
7. Slide re stop against the interior wall surface and attach
with screws. Figure 19

18 20306749
LX Series Direct Vent Gas Fireplace VENTING INSTALLATION
FP1176
max 90 bends
Figure 20 -
Maximum Three (3) 90° Elbows
Per Installation
3 x 90°
Elbows
3 x 90°
Elbows
FP1176
Max 20"
Max 20"
36"
(914 mm)
Max.
36"
(914 mm)
Max.
FP1177
max horizontal run
Figure 21 -
Maximum Horizontal Run with No Rise FP1177
Example: According to the vent graph (Page 16) the
maximum horizontal vent length in a system with a 7.5'
vertical rise is 20’ (6 m). If a 90° elbow is required in the
horizontal vent it must be reduced to 17' (5.2 m).
In Figures 22 and 23, Dimension A plus B must not be
greater than 17' (5.2 m).
• For each 45° elbow installed in the horizontal run, the
length of the horizontal run MUST be reduced by 18"
(457 mm). This does not apply if the 45° elbows are
installed on the vertical part of the vent system.
•The maximum number of elbow degrees in a system is
270°. Figure 24
A: 10’ B: 7’
7’6”
FP1959
max run w/elbows
Figure 22 -
Maximum Vent Run with Elbows
Horizontal 90° Elbow = 3' Reduction
FP1959
A + B = 17' Maximum
90°
AB
7’6”
(2.3 m)
FP2717
horiz run reduct
Figure 23 -
Horizontal Run Reduction
FP2717
Example: Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular Variation = 270°
Figure 24 -
Maximum Elbow Usage
1
2
3
4
1
2
3
4
1 + 2 + 3 + 4 = 270°

20306749 19
LX Series Direct Vent Gas Fireplace
BELOW GRADE INSTALLATIONS
When it is not possible to meet the required vent terminal
clearances of 12" above grade level, a snorkel kit is recom-
mended. It allows installation depth down to 7" (178 mm)
below grade level. The 7" (178 mm) is measured from the
center of the horizontal vent pipe as it penetrates through
the wall.
Ensure that sidewall venting clearances are observed.
If venting system is installed below ground, we recom-
mend a window well with adequate and proper drainage
to be installed around the termination area.
If installing a snorkel, a minimum 24" vertical rise is neces-
sary. The maximum horizontal run with the 24” (610 mm)
vertical pipe is 36" (914 mm). This measurement is taken
from the collar of the replace (or transition elbow) to the
face of the exterior wall. See the Sidewall Venting Graph
for extended horizontal run if the vertical exceeds 24".
1. Establish vent hole through the wall. Page 17, Figure
15
2. Remove soil to a depth of approximately 16" (406 mm)
below base of snorkel. Install drain pipe. Install window
well (not supplied). Rell hole with 12" (305 mm) of
coarse gravel leaving a clearance of approximately 4"
below snorkel. Figure 25
3. Install vent system.
4. Ensure a watertight seal is made around the vent pipe
coming through the wall.
5. Apply high temperature sealant caulking (supplied)
around the 4" and 7" snorkel collars.
6. Slide the snorkel into the vent pipes and secure to the
wall.
7. Level the soil so as to maintain a 4" clearance below
snorkel. Figure 25
VENTING INSTALLATION
FP1965
below grade install
24”
Minimum
Figure 25 -
Below Grade Installation
Screws
Minimum
4" Clearance
Ground
Window
Well
Gravel
Drain
Foundation Wall
Firestop
FP1965
FP1966
snorkel
Figure 26 -
Snorkel Installation, Recessed Foundation
Foundation
Recess
Watertight Seal
Around Pipe Sheet Metal
Screws
Snorkel
Wall Screws
FP1966
If the foundation is recessed, use recess brackets (not
supplied) for securing lower portion of the snorkel. Fasten
brackets to wall rst, then secure to snorkel with self drill-
ing #8 x 1/2 sheet metal screws. It will be necessary to
extend vent pipes out as far as the protruding wall face.
Figure 26
WARNING
• Do not back ll around snorkel.
• A clearance of at least 4" must be
maintained between the snorkel and
the soil.
VERTICAL THROUGH-THE-ROOF APPLICA-
TIONS
This Gas Fireplace has been approved for,
•Vertical installations up to 40' (12 m) in height. Up to
a 10' (3 m) horizontal vent run can be installed within
the vent system using a maximum of two 90° elbows.
Figure 27
•Install restrictor disk on vertical runs of 10' or more.
• Up to two 45° elbows may be used within the horizontal
run. For each 45° elbow used on the horizontal plane,
the maximum horizontal length must be reduced by 18"
(450 mm).
Example: Maximum horizontal length
No elbows = 10’ (3 m)
1 x 45° elbows = 8.5’ (2.6 m)
2 x 45° elbows = 7’ (2.1 m)
•A minimum of an 8' (2.5 m) vertical rise is required.
•Two sets of 45°elbows offsets may be used within the
vertical sections. From 0 to a maximum of 8' (2.5 m) of
vent pipe can be used between elbows. Figure 28
•The maximum angular variation allowed in the system
is 270°. Figure 28
•See termination height on Page 22.

20 20306749
LX Series Direct Vent Gas Fireplace VENTING INSTALLATION
FP1183
max height
10' Maximum
40'
Maximum
Height
8'
Minimum
Height
Support
Straps
Every 5'
Vertical
Support Straps Every 3'
10' Maximum
40'
Maximum
Height
8'
Minimum
Height
Support Straps Every 3'
FP1183
Figure 27 -
Support Straps for Horizontal Runs
1
2
3
4
1
2
3
4
FP1179
max bends
Example: Elbow 1 = 90°
Elbow 2 = 45°
Elbow 3 = 45°
Elbow 4 = 90°
Total Angular = 270°
Variation
FP1179
Figure 28 -
Maximum Elbow Usage
INSTALLATION FOR VERTICAL
TERMINATION
1. Determine the route your vertical venting will take. If
ceiling joist, roof rafters or other framing will obstruct the
venting system, consider an offset. Figure 29 to avoid
cutting load bearing members.
FP1969
offset w/ wallstrap
Figure 29 -
Offset with Wall Strap and 45° Elbows
Roof Flashing
Wall Strap
45° Elbows
Ceiling Firestop
FP1669
NOTE: Pay special attention to these installation instructions
for required clearances (air space) to combustibles when
passing through ceilings, walls, roofs, enclosures, attic
rafters, etc. Do not pack air spaces with insulation. Also
note maximum vertical rise of the venting system and any
maximum horizontal offset limitations. Offsets must fall
within the parameters shows on Page 16, Figure 13.
2. Set replace in desired location. Drop a plumb line down
from the ceiling to the position of the ue exit. Mark the
center point where the vent will penetrate the ceiling.
Drill a small locating hole a this point.
Drop a plumb line from the inside of the roof to the ceiling
locating hole in the ceiling. Mark the center point where
the vent will penetrate the roof. Drill a small locating hole
at this point.
FLAT CEILING INSTALLATION
1. Cut a 91⁄2" (241 mm) square hole in the ceiling using the
locating hole as a center point The opening should be
framed to 91⁄2" x 91⁄2" (241 x 241 mm) inside dimensions
as shown in Figure 31 using framing lumber the same
size as the ceiling joist. If the area above the ceiling is
an insulated ceiling or a room, nail restop from the top