Lennox Hearth Products MPD35ST-NM-B User manual

MPD35ST-NM-B MPD35ST-NE-B
MPD35ST-PM-B MPD35PF-NE-B
MPD35PF-NM-B
MPD35PF-PM-B
OTL Report No. 116-F-28-5
US
Portland
MODELS
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 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 certified kit is used.
INSTALLATION INSTRUCTIONS
MILLIVOLT: ELECTRONIC:
P/N 850024M Rev. J 01/2011
This manual is one of a set of two supporting this product.
Refer to P/N 875025M for Care and Operation Instructions.
Ce manuel est disponible en francais, simplement
en faire la demande. Numéro de la pièce 850024CF.
AVERTISSEMENT : Assurez-vous de bien suivre les
instructions données dans cette notice pour réduire au
minimum le risque d’incindie ou d’explosion ou pour
éviter tout dommage matériel, toute blessure ou la mort.
- Ne pas entreposer ni utilizer d’essence ni d’autres vapeurs
ou liquides inflammables dans le voisinage de cet appareil
ou de tout autre appareil.
- QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ :
• Ne pas tenter d’allumer d’appareil.
• Ne touchez à aucan interrupteur. Ne pas vous servir des
téléphones se trouvant dans le bâtiment où vous trouvez.
• Appelez immédiatement votre fournisseur de gaz depuis
un voisin. Suivez les instructions du fournisseur.
• Si vous ne pouvez rejoindre le fournisseur de gaz,
appelez le service des incindies.
-L’installation et l’entretien doivent être assurés par un
installateur ou un service d’entretien qualifié ou par le
fournisseur de gaz.
WARNING: If the information in these instructions
is not followed exactly, a fire or explosion may
result, causing property damage, personal injury,
or death.
-
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.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
•
department.
- Installation and service must be performed by a
WARNING/AVERTISSEMENT/AVISO
• HOT GLASS WILL CAUSE
BURNS.
• DO NOT TOUCH GLASS
UNTIL COOLED.
• NEVER ALLOW CHILDREN
TO TOUCH GLASS.
• UNE SURFACE VITRÉE CHAUDE
PEUT CAUSER DES BRÛLURES.
• LAISSER REFROIDIR LA SURFACE
VITRÉE AVANT D'Y TOUCHER.
• NE PERMETTEZ JAMAIS À UN ENFANT
DE TOUCHER LA SURFACE VITRÉE.
• EL VIDRIO CALIENTE
CAUSARÁ QUEMADURAS.
• USTED DEBE NUNCA
TOCAR EL VIDRIO CALIENTE.
• LOS NIÑOS DEBEN NUNCA
TOCAR EL VIDRIO.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
INSTALLATEUR : Laissez cette notice avec l'appareil.
CONSOMMATEUR : Conservez cette notice pour
consultation ultérieure.
MPD35 Direct-Vent
Gas Fireplaces

2
TABLE OF CONTENTS
Packaging .........................................Page 2
Introduction ......................................Page 2
General Information..........................Page 2
Requirements for the
Commonwealth of Massachusetts .Page 4
New York City Approval.....................Page 4
Cold Climate Insulation.....................Page 5
Manufactured Home Requirements ..Page 5
Location............................................Page 5
Vent Termination Clearances ............Page 6
Appliance and Vent Clearances .........Page 8
Detailed Installation Steps.................Page 9
Typical Installation Sequence ...........Page 9
Step 1. Framing.................................Page 10
Fireplace and Framing Specifications .Page 11
Step 2. Routing Gas Line ..................Page 13
Step 3. Appliance Vent Collar............Page 13
Step 4. Install The Venting System ...Page 14
Vertical Termination Systems............Page 15
Vent Section Length Chart ................Page 15
Vertical Vent Tables and Figures........Page 18
Horizontal Termination System .........Page 20
Horizontal Vent Tables and Figures ...Page 22
Venting Using Flexible Vent Pipe.......Page 25
Step 5. Field Wiring.........................Page 26
Step 6. Optional Blower Kit Wiring..Page 27
Step 7. Connecting Gas Line...........Page 27
Step 8. Verifying Appliance Operation Page 28
Step 9. Installing Logs ...................Page 29
Step 10. Remove/Install Glass Door .Page 33
Step 11. Burner Adjustments ............Page 33
Step 12. Hood Installation.................Page 35
Finishing Requirements ....................Page 35
Step 13. Attaching Safety-in-
Operation Warnings................. Page 36
Installation Accessories ....................Page 37
Gas Conversion Kits .................. Page 39
Please read and understand these
instructions before beginning your
installation.
PACKAGING
The assembled vented gas fireplace heater is
packaged with:
1 - the logs are packaged in a carton located
within the firebox.
2 - oneplasticbagofglowingembersislocated
in the bottom compartment.
3 - one envelope containing the literature
package which consists of the care and
operations manual,installationinstructions,
warning labels and warranty; envelope is
located in the bottom compartment.
4 - oneventrestrictortobeappliedasshownon
page 14; restrictoris tapedto theenvelope.
5 - one hood taped to the front of the standoff
bracket at the top of the unit.
6 - three-piece ceramic ember panel.
INTRODUCTION
The Millivolt appliances have a millivolt gas
control valve with piezo ignition system. If any
optional accessories that will require electrical
power are to be installed, the electrical power
must be provided at the time of appliance
installation.
Children and adults should be alerted to the
hazards of high surface temperature and
should stay away to avoid burns or clothing
ignition.
Les enfants et les adultes devraient être infor-
mésdes dangers que posentles températures
de surface élevées et se tenir à distance afin
d’éviter des brûlures ou que leurs vêtements
ne s’enflamment.
DO NOT ATTEMPT TO ALTER OR MODIFY
THE CONSTRUCTION OF THE APPLIANCE OR
ITS COMPONENTS. ANY MODIFICATION OR
ALTERATIONMAY VOIDTHEWARRANTY,CER-
TIFICATION AND LISTINGS OF THIS UNIT.
WARNING
Young children should be care-
fully supervised when they are
in the same room as the appli-
ance. Toddlers, young children
and others may be susceptible
to accidental contact burns. A
physicalbarrierisrecommended
if there are at risk individuals in
the house. To restrict access to
a fireplace or stove, install an
adjustable safety gate to keep
toddlers, young children and
other at risk individuals out of
the room and away from hot
surfaces.
AVERTISSEMENT
Lesjeunesenfantsdevraientêtre
surveillésétroitementlorsqu’ils
se trouvent dans la même pièce
que l’appareil. Les tout petits,
lesjeunesenfantsoulesadultes
peuvent subir des brûlures s’ils
viennent en contact avec la sur-
facechaude. Ilestrecommandé
d’installerunebarrièrephysique
si des personnes à risques habi-
tent la maison. Pour empêcher
l’accès à un foyer ou à un poêle,
installez une barrière de sécu-
rité;cettemesureempêcherales
tout petits, les jeunes enfants et
toute autre personne à risque
d’avoir accès à la pièce et aux
surfaces chaudes.
GENERAL INFORMATION
The Electronic appliances are designed to op-
erate on natural or propane gas. An electronic
intermittentpilotignitionsystemprovidessafe,
efficient operation. External electrical power is
required to operate these units.
These vented gas fireplace heaters are sealed
combustion, air-circulating gas fireplaces de-
signed for residential applications.
Approved Vent Components - These fireplaces
are designed, tested and listed for operation
and installation with the following vent com-
ponents only:
•Secure Vent™ Direct-Vent System Compo-
nents manufactured by Security Chimneys
International,
•Secure Flex™ Flexible Vent Components
manufactured by Security Chimneys Inter-
national and
•Z-FLEX™ Model GA Venting Systems listed
to UL1777 and ULCS635 manufactured by
Flexmaster Canada Limited.
Use only the correct size venting (4-1/2" inner
and 7-1/2" outer).
These approved vent system components are
labeled for identification. DO NOT use any
other manufacturer’s vent components with
these appliances.

3
WARNING
Improper installation, adjust-
ment, alteration, service or
maintenance can cause injury
or property damage. Refer to
this manual. For assistance or
additional information consult
a qualified installer, service
agency or the gas supplier.
WARNING
Failure to comply with these
installationinstructionswillresult
in an improperly installed and
operating appliance, voiding its
warranty. Anychangetothisappli-
anceand/oritsoperatingcontrols
is dangerous.
WARNING
Clothing or other flammable
material should not be placed
on or near the appliance.
AVERTISSEMENT
On ne devrait pas placer de
vêtements ni d’autres matières
inflammables sur l’appareil ni à
proximité.
WARNING
Any safety screen or guard
removed for servicing the appli-
ance must be replaced prior to
operating the appliance.
AVERTISSEMENT
Tout écran ou protecteur retiré
pour permettre l’entretien de
l’appareil doit être remis en
place avant de mettre l’appareil
en marche.
Note: Installation and repair should be done
by a qualified service person. The appliance
should be inspected before use and at least
annually by a professional service person.
More frequent cleaning may be required
due to excessive lint from carpeting, bed-
ding material, etcetera. It is imperative
that control compartments, burners and
circulating air passageways of the appliance
be kept clean.
Remarque: L’installation et la réparation
devrait être confiées à un technicien qualifié.
L’appareil devraitfairel’objetd’uneinspection
par un technicien professionnel avant d’être
utilisé et au moins une fois l’an par la suite.
Des nettoyages plus fréquents peuvent être
nécessaires si les tapis, la literie, et cetera
produisent une quantité importante de pous-
sière. Il est essentiel que les compartiments
abritant les commandes, les brûleurs et les
conduits de circulation d’air de l’appareil
soient tenus propres.
Do not use these appliances if any part
has been under water. Immediately call a
qualified, professional service technician
to inspect the appliance and to replace any
parts of the control system and any gas
control which have been under water.
Nepasutilisercetappareils’ilaétéplongé,
même partiellement, dans l’eau. Ap-
peler un technicien qualifié pour inspecter
l’appareil et remplacer toute partie du
systèmede commandeettoutecommande
qui a été plongée dans l’eau.
IMPROPER INSTALLATION OR USE OF THIS
APPLIANCE CAN CAUSE SERIOUS INJURY OR
DEATH FROM FIRE, BURNS, EXPLOSION OR
CARBON MONOXIDE POISONING.
Only trim kit(s) supplied by the manufacturer
shall be used in the installation of this ap-
pliance.
Seules les trousses de garniture fournies
par le fabricant doivent être utilisées pour
l’installation de cet appareil.
These appliances comply with National Safety
Standards and are tested and listed by OMNI-
TestLaboratories,Inc. (ReportNo.116-F-28-5)
to ANSI Z21.88 (in Canada, CSA-2.33), and
CAN/CGA-2.17-M91 in both USA and Canada,
as vented gas fireplace heaters.
Both millivolt and electronic versions of
these appliances are listed by OMNI-Test
Laboratories for installation in bedrooms
and Manufactured Homes.
Misc. Codes / Standards -
TheInstallation mustconformtolocalcodesor,
in the absence of local codes, with the National
Fuel Gas Code, ANSI Z223.1/NFPA 54 - latest
edition(InCanada,thecurrentCAN/CSA-B149.1
installation code).
The appliance, when installed, must be electri-
cally grounded and wired in accordance with
local codes or, in the absence of local codes,
with the National Electrical Code, ANSI/NFPA
70 - latest edition, or the Canadian Electrical
Code, CSA C22.1 - latest edition.
Provide adequate clearances around air open-
ings and adequate accessibility clearance for
serviceandproperoperation.Neverobstructthe
front or back openings of the appliance.
These appliances are designed to operate on
natural or propane gas only. The use of other
fuels or combination of fuels will degrade
the performance of this system and may be
dangerous.
These fireplaces are designed as supplemental
heaters. Therefore, it is advisable to have an
alternate primary heat source when installed
in a dwelling.
Millivolt Models - The millivolt appliances are
manually controlled and feature a spark igniter
(piezo) that allows the appliance's pilot gas to
be lit without the use of matches or batteries.
This system provides continued service in the
event of a power outage.
Millivolt models come standard with a manu-
ally-modulated gas valve; flame appearance and
heat output can be controlled at the gas valve.
The BTU Input for these appliances is shown
in Table 1.
Electronic Models - Electronic models have a
fixed rate gas valve. Input of electronic models
is shown in Table 1.
Input (BTU) Gas Valves (all models)
Models Fuel
Type
Input Rate
(BTU / HR)
MPD35ST/PF-NM
(Millivolt) Natural 30,000 high 23,000 low
MPD35ST/PF-PM
(Millivolt)
(if field converted)
Propane 28,000 high
22,000 low
MPD35ST/PF-NE
(Electronic) Natural 30,000
MPD35ST/PF-PE
(Electronic)
(if field converted)
Propane 28,000
Table 1

4NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Test gauge connections are provided on the
front of the millivolt and electronic gas control
valve (identified IN for the inlet and OUT for the
manifold side). The control valves have a 3/8"
(10mm) NPT thread inlet and outlet side of the
valve (refer to Figures 1 and 2).
Propane tanks are at pressures that will cause
damage to valve components. Verify that the
tanks have step down regulators to reduce the
pressure to safe levels.
Gas Valve Diagrams
See Figure 1 for Millivolt models and Figure 2
For Electronic Models.
These appliances must not be connected to a
chimney or flue serving a separate solid fuel
burning appliance.
Manifold Gas Supply Pressure
(all models)
Fuel # Low High
Natural
Gas
(Lo) 2.2" WC
(0.55 kPa)
(Hi) 3.5" WC
(0.87 kPa)
Propane (Lo) 6.3" WC
(1.57 kPa)
(Hi) 10.0" WC
(2.49 kPa)
Table 3
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).
Theseappliancesandtheirindividualshut-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).
Orifice Sizes - Sea Level to High Altitude
(All Models)
These appliances are tested and approved for
installation at elevations of 0-4500 feet (0-1372
meters)abovesealevelusingthestandardburner
orifice sizes (marked with an "*" in Table 4 ).
Forelevationsabove4500feet,contactyourgas
supplier or qualified service technician.
Deration - At higher elevations, the amount of
BTU fuel value delivered must be reduced by
eitherusinggasthathasbeenderatedbythegas
company or by changing the burner orifice to a
smallersizeasregulatedbythe localauthorities
having jurisdiction and by the (USA) National
Fuel Gas Code NFPA 54/ANSI Z223.1 - latest
edition or, in Canada, the CAN/CSA-B149.1
codes - latest edition.
Installtheapplianceaccordingtotheregulations
of the local authorities having jurisdiction and,
in the USA, the National Fuel Gas Code NFPA
54 / ANSI Z223.1 - latest edition or, in Canada,
the CAN/CSA-B149.1 - latest edition.
Flame breadth, height and width will dimenish
4% for every 1,000 feet of altitude.
REQUIREMENTS FOR THE COMMON-
WEALTH OF MASSACHUSETTS
These fireplaces are approved for installation in
the US state of Massachusetts if the following
additional requirements are met:
• Install this appliance in accordance with
Massachusetts Rules and Regulations 248
C.M.R.
• Installationandrepair mustbedoneby a
plumber or gas fitter licensed in the Com-
monwealth of Massachusetts.
• Theexiblegasline connectorusedshall
not exceed 36 inches (92 centimeters) in
length.
• Theindividualmanualshut-offmustbea
T-handle type valve.
Massachusetts Horizontal Vent Requirements
IntheCommonwealthofMassachusetts,hori-
zontal terminations installed less than seven
(7) feet above the finished grade must comply
with the following additional requirements:
• A hard wired carbon monoxide detector
with an alarm and battery back-up must be
installed on the floor level where the gas
fireplace is installed. The carbon monoxide
detector must comply with NFPA 720, be
ANSI/UL 2034 listed and be ISA certified.
• Ametalorplasticidenticationplatemust
be permanently mounted to the exterior of
thebuilding ata minimumheight ofeight (8)
feet above grade and be directly in line with
the horizontal termination. The sign must
read, in print size no less than one-half (1/2)
inch in size, GAS VENT DIRECTLY BELOW.
KEEP CLEAR OF ALL OBSTRUCTIONS.
NEW YORK CITY, NEW YORK (MEA)
Installation of these fireplaces are approved
for installation in New York City in the US state
of New York.
Inlet Gas Supply Pressure
(all models)
Fuel # Minimum Maximum
Natural Gas 4.5" WC
(1.12 kPa)
10.5" WC
(2.61 kPa)
Propane 11.0" WC
(2.74 kPa)
13.0" WC
(3.23 kPa)
Table 2
Gas Pressure - All Models
Tables 2 and 3 show the appliances' inlet and
manifold gas pressure requirements:
Figure 2
Honeywell Electronic
Gas Valve
ON/OFF Switch
Electronic
Gas Control
Valve
Inlet
Pressure
Port
Manifold Pressure Port
OFF
IN
PSI
ON
CONTROL
IGNITER
H
I
LO
W
HTPTHTPT
P
I
L
O
T
P
I
L
O
T
O
N
it
O
F
F
IN OUT
HI/LO Variable
Flame Height
Adjustment
Figure 1 - SIT Millivolt Gas Valve
Manifold Pressure Tap
Inlet Pressure Tap
Pilot Adjustment
Screw
Main Gas Control Knob
OFF/PILOT/ON
Burner Orifice Sizes (all models)
Elevation
Feet (meters)
Natural
Gas
drill size (inches)
Propane
Gas
drill size (inches)
0-4500
(0-1372) #37 (0.104") *
24M10 •
1.55 mm (0.061")*
42M79 •
Table 4 * Standard size installed at factory
• Part /Cat. Number

5
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LOCATION
In selecting the location, the aesthetic and functional use of the appliance are primary concerns.
However, vent system routing to the exterior and access to the fuel supply are also important.
Due to high temperatures, the appliance should be located out of traffic and away from furniture
and draperies (Figure 3).
En raison des températures élevées, l’appareil devrait être installé dans un endroit où il y a
peu de circulation et loin du mobilier et des tentures (Figure 3).
The location should also be free of electrical, plumbing or other heating/air conditioning ducting.
These direct-vent appliances are uniquely suited for installations requiring a utility shelf positioned
directly above the fireplace. Utility shelves like these are commonly used for locat-ing television
sets and decorative plants.
COLD CLIMATE INSULATION
For cold climate installations, seal all cracks
around your appliance with noncombustible
material and wherever cold air could enter
the room. It is especially important to insulate
outside chase cavity between studs and under
floor on which appliance rests, if floor is above
ground level. Gas line holes and other open-
ings should be caulked or stuffed with unfaced
fiberglass insulation.
If the fireplace is being installed on a cement
slab in cold climates, a sheet of plywood or
otherraisedplatformcanbeplacedunderneath
to prevent conduction of cold transferring to
the fireplace and into the room. It also helps to
sheetrockinsidesurfacesandtapeformaximum
air tightness and caulk firestops.
MANUFACTURED HOME
REQUIREMENTS
This appliance may be installed in an aftermar-
ket permanently located, manufactured home
and must be installed in accordance with the
manufacturer's instructions and the Manufac-
tured Home Construction and Safety Standard,
Title 24 CFR, Part 3280, in the United States, or
the Standard for Installation in Mobile Homes,
CAN/CSA Z240 MH Series, in Canada.
Cetappareilpeutêtreinstallécómmedumatéri-
eld'originedansunemaisonpréfabriquée(É.U.
seulement) ou mobile et doit être installé selon
les instructions du fabricant et conformément
à la norme Manufactured Home Constructions
and Safety, Title 24 CFR, Part 3200 aux Unis ou
à la norme Can/CSA-Z240 Série MM, Maisons
mobiles au Canada.
Thisapplianceisonlyforusewiththetypeofgas
indicated on the rating plate. This appliance is
not convertible for use with other gases, unless
a certified kit is used.
Cet appareil doit être utilisé uniquement avec le
type de gaz indiqué sur la plaque signalétique.
Cetappareilnepeutêtreconvertià d'autresgaz,
sauf si une trousse de conversion est utilisée.
CAUTION: Ensure that the cross mem-
bers are not cut or weakened during
installation. The structural integrity of
the manufactured home floor, wall, and
ceiling / roof must be maintained.
CAUTION: This appliance must be ground-
ed to the chassis of the manufactured
home in accordance with local codes or
in the absence of local codes, with the
National Electrical Code ANSI / NFPA 70
- latest edition or the Canadian Electrical
Code CSA C22.1 - latest edition.
Figure 3
Vertical
Venting
Offset Venting
(one end flush
with wall)
When the unit is installed with one side flush with a
wall, the wall on the other side of the unit must not
extend beyond the front edge of the unit.
Vertical
Vent
Horizontal Vent
(side vent)
Horizontal Vent
(top vent)
(See-Through Model Shown)

6NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
12
X
Roof Pitch is X/12
2 FT
MIN.
2 FT MIN.
Lowest
Discharge
Opening
H*
*H = MINIMUM HEIGHT FROM ROOF TO
LOWEST DISCHARGE OPENING OF VENT
TERMINATION HEIGHTS FOR VENTS ABOVE
FLAT OR SLOPED ROOFS
Horizontal Overhang
Vertical
Wall
Vent
Termination
Storm Collar
Concentric
Vent Pipe
Flashing
1 inch (25.4 mm) Minimum
Clearance to Combustibles
Figure 5
Vertical Vent Termination Clearances
Be aware that this is a heat producing ap-
pliance. Objects placed above the unit are
exposed to elevated temperatures.
Do not insulate the space between the appli-
ance and the area above it (see Figure 8 ).
Theminimumheight fromthe base ofthe appli-
ance to the underside of combustible materials
used to construct a utility shelf in this fashion
is shown in Figure 8.
The appliance should be mounted on a fully
supported base extending the full width and
depth of the unit. The appliance may be located
onornearconventionalconstructionmaterials.
However, if installed on combustible materials,
such as carpeting, vinyl tile, etc., a metal or
woodbarriercoveringtheentirebottomsurface
must be used.
VENT TERMINATION CLEARANCES
These instructions should be used as a
guideline and do not supersede local codes
in any way. Install venting according to local
codes,theseinstructions,thecurrentNational
Fuel Gas Code (ANSI-Z223.1) in the USA or
the current standards of CAN/CSA-B149.1
in Canada.
Vertical Vent Termination Clearances
Terminatemultipleventterminationsaccordingto
the installation codes listed above and Figures
4 and 5.
Note - See Figure 36 on Page 21 for the exterior wall recess
allowances of the square horizontal termination.
Termination Heights For Vents
Above Flat Or Sloped Roofs
Ref. NFPA 54 / ANSI Z223.1
Roof Pitch * Feet *Meters
Flat to 6/12 1.0 0.3
6/12 to 7/12 1.25 0.38
7/12 to 8/12 1.5 0.46
8/12 to 9/12 2.0 0.61
9/12 to 10/12 2.5 0.76
10/12 to 11/12 3.25 0.99
11/12 to 12/12 4.0 1.22
12/12 to 14/12 5.0 1.52
14/12 to 16/12 6.0 1.83
16/12 to 18/12 7.0 2.13
18/12 to 20/12 7.5 2.29
20/12 to 21/12 8.0 2.44
The vent / air intake termination clearances
above the high side of an angled roof is as
shown in the following chart:
Figure 6
6"
(152 mm)
12"
(305 mm)
Combustible Projection greater
Horizontal Vent Termination Clearances
Combustible Projection
2-1/2 inches or less in length
18"
(457 mm)
Ventilated
Soffit Unventilated
Soffit
than 2-1/2 inches in length
Termination Kit
Side Elevation View
Termination Kit
All horizontal terminations
may be located as close as
6” (152mm) to any
(non-combustible and
combustible) exterior
sidewall. This distance
may be decreased to 2”
(51mm) for non--
combustible exterior
sidewalls only, if the
SV4.5HT-2 termination
is used.
Horizontal Vent Termination Clearances
The horizontal vent termination must have a minimum of 6" (152 mm) clearance to any overhead
combustible projection of 2-1/2" (64 mm) or less (see Figure 6). For projections exceeding 2-1/2"
(64 mm), see Figure 6. For additional vent location restrictions refer to Page 7.
Figure 4 - Multiple Terminations
12”
(305mm)
Minimum

7
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
EXTERIOR HORIZONTAL VENT TERMINATION CLEARANCE REQUIREMENTS
V
VV
V
V
F
C
Fixed
Closed
Window
Operable
Window
B
B
A
B
H
M
I
= Area where Termination is not Permitted
= Air Supply Inlet
X= Vent Termination
V
D
V
3 ft.
3 ft.
AA
A
= 9” in U.S.
= 12” in Canada
V
L
B
J
X
V
A
G
Inside
Corner Detail
B
C
C
C
*18”
Ventilated Soffit
Horizontal
Termination
Detail D
Exterior Wall
6”
Inside Corner
* See Item D in the Text Below.
V
P
V
O
NN
Q
NOTE: Local Codes Or Regulations
May Require Different Clearances.
NOTE: Location Of The Vent Termination
Must Not Interfere With Access To The
Electrical Service.
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8NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
MINIMUM CLEARANCES TO COMBUSTIBLES
Appliance And Vent Clearances
The appliance is approved with zero clearance to combustible materials on all sides (as detailed
in Table 5), with the following exception: When the unit is installed with one side flush with a
wall, the wall on the other side of the unit must not extend beyond the front edge of the unit.
In addition, when the unit is recessed, the side walls surrounding the unit must not extend beyond
the front edge of the unit (see Figure 3).
*Note: 3 in. (75 mm) above any horizontal/inclined vent component.
**Note: See Page 9, Step 1 for clearance requirements to the nailing ange located at each side
of the unit and any screw heads adjacent to it.
Hearth Extension - A hearth extension is not
required with this appliance. If a hearth exten-
sion is used, do not block the lower control
compartment door. Any hearth extension used
is for appearance only and does not have to
conform to standard hearth extension instal-
lation requirements.
Shelf Height - To provide for the lowest pos-
sible shelf surface, use the alternate rear vent
outlet,theventingattachedtothetopventshould
be routed in a way to minimize obstructions to
the space above the appliance. Do not insulate
thespacebetween theappliance andthe area
above it (see Figure 8). The minimum height
fromthebaseoftheappliancetotheundersideof
combustiblematerialsusedtoconstructautility
shelf in this fashion is shown in Figure 8.
The appliance should be mounted on a fully
supported base extending the full width and
depth of the unit. The appliance may be located
onornearconventionalconstructionmaterials.
However, if installed on combustible materials,
such as carpeting, vinyl tile, etc., a metal or
woodbarriercoveringtheentirebottomsurface
must be used.
Wall Finishes / Surrounds / Mantels
Note: Combustible wall finish materials and/or
surround materials must not be allowed to
encroach the area defined by the appliance front
face (black sheet metal). Never allow combus-
tible materials to be positioned in front of or
overlapping the appliance face (see Figure 65
on Page 35).
Non-combustible materials, such as surrounds
and other appliance trim, may be installed on
the appliance face with these exceptions: they
must not cover any portion of the removable
glass panel or control compartment.
Vertical installation clearances to combustible
mantels vary according to the depth of the
mantel. See Figure 9. Mantels constructed of
non-combustible materials may be installed
at any height above the appliance opening;
however, do not allow anything to hang below
the fireplace hood.
3 (76)
2
(51)
4
(102)
6
(152)
8
(203)
10
(254)
12
(305)
5 (127)
9 (289)
13 (330)
11 (279)
7 (178)
inches (millimeters)
Figure 8 - Shelf Height Minimum Clearances
Shelf Height
(see table)
Shelf Above Fireplace With Side Venting
Do not insulate this space
above the appliance.
Shelf Height
(see table)
Shelf Above Fireplace With Top Venting
Mantel Depth
Top of
Appliance
Front or Rear Face
of Appliance
Figure 7 - Minimum Mantel Clearances
Model No. Shelf Height - Inches (millimeter)
Side Vent - Straight Out Back Top Vent - with One 90 Degree Elbow
Secure Vent & Secure Flex Secure Vent Secure Flex
MPD35ST/PF 35-1/4 (895) *49-1/2 (1245) *51-1/4 (1302)
* Includes 3” clearance to combustibles (required above vent components)
Do not insulate this space
above the appliance.

9
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
MINIMUM CLEARANCES*Inches (millimeters)
Sides 1/2 in. (13)
0 (0) from Spacers Or Dimples **
Top Spacers 0 (0)
Floor 0 (0)
From Bottom of Unit To Ceiling 72 (1829)
Vent 3 (76) Top* / 1 (25.4) Sides & Bottom
SERVICE CLEARANCES Feet (meters)
Front, Back, Sides 3 feet (0.9 meters)
Table 5
WARNING
Failure to position the parts in accordance with these
diagrams or failure to use only parts specifically
approved with this appliance may result in property
damage or personal injury.
AVERTISSEMENT
Risque de dommages ou de blessures si les pièces
ne sont pas installées conformément à ces schémas
et ou si des pièces autres que celles spécifiquement
approuvées avec cet appareil sont utilisées.
DETAILED INSTALLATION STEPS
The appliance is shipped with all gas controls and components installed
and pre-wired.
1. Remove the shipping carton. Remove the shipping pad, exposing
the front glass door.
2. Open the two latches (located under the firebox floor) securing the
glass door. Remove the door by tilting it outward at the bottom and
lifting it up. Set the door aside protecting it from inadvertent damage.
See Removing and Installing Glass Panels on Page 33.
3. Remove the top louvered panel and locate the pressure relief plates
(see Figure 11).
4. Lift the pressure relief plates and remove the cardboard from beneath
each plate (be careful not to damage the white gasket).
1
(25)
2
(51)
3
(76)
1 (25)
2 (51)
3 (76)
4
(102)
4 (102)
5
(127)
5 (127)
6 (152)
7 (178)
8 (203)
9 (229)
10 (250)
Combustible Materials
Allowed In Shaded Area
“Safe Zone”
Inches (millimeters)
Top View of
Fireplace
45o
At 5" minimum side
wall clearance, the wall
(shown in dark gray) can
be any length.
Minimum
Distance to
Unprotected
Side Wall
One end of the unit may be
flush with a perpendicular
wall, but the wall at the other
end must not extend beyond
the front edge of the unit.
Figure 9

10 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Unit Being Secured by Its Nailing
Flanges to the Framing
Note: The nailing flanges, combustible members
and screw heads located in areas directly adjacent
to the nailing flanges, are EXEMPT from the 1/2”
clearance to combustible requirements for the
firebox outer wrapper. Combustible framing may be
in direct contact with the nailing flanges and may
be located closer than 1/2” from screw heads and
the firebox wrapper in areas adjacent to the nailing
flanges. Frame the opening to the exact dimensions
specified in the framing details of this manual.
Side
Framing
Unit Nailing Flange
(No clearance to
combustible
framing is required)
Left Side Front Corner of Fireplace Shown
(Right Side Requirements the Same)
Unit Being Secured By Its Nailing Flanges
To The Framing
Figure 11
REMOVE
CARDBOARD
BEFORE USING
Pressure Relief
Plates
Remove Cardboard Before
Using Appliance
REMOVE
CARDBOARD
BEFORE USING
Figure 12 - Nailing Flanges
Step 1. FRAMING
Frametheseappliances asillustratedinFigures
13 and 14 on Pages 11 and 12. All framing
details must allow for a minimum clearance
to combustible framing members as shown
in Table 5 on Page 8.
Iftheapplianceistobeelevatedabovefloorlevel,
asolidcontinuousplatformmustbeconstructed
below the appliance.
Headers may be in direct contact with the appli-
ancetopspacerswhentheyarebentupvertically
maintainingthe3"clearancetothefireplacetop,
but must not be supported by them or notched
to fit around them. All construction above the
appliancemustbeself-supporting. DONOTuse
the appliance for structural support.
The fireplace should be secured to the side
framing members using the unit's nailing
flanges - one top and bottom on each side of
the fireplace front. See Figure 12. Use 8d nails
or their equivalent.
TYPICAL INSTALLATION SEQUENCE
The typical sequence of installation is outlined
below. However, each installation is unique
and may result in variations to the steps
described.
See the page numbers references in the follow-
ing steps for detailed procedures.
Step 1. (Page 10) Construct the appliance
framing. Position the appliance within the
framing and secure with nailing brackets. Bend
up the appropriate header spacing guides for
the drywall/finish material thickness to be used
(refer to Figure 62, page 33). Bend up the
outer pair for 1/2" materials and the inner pair
for 5/8" materials. Bend out the appropriate
nailing flanges for the drywall/finish material
to be used. Nailing flanges are provided for
flush framing, 1/2 inch and 5/8 inch framing
depths (see Figure 12).
Step 2. (Page 13)Route gas supply line to
appliance location.
Step 3. Preparing the appliance vent collar
(Page 13).
Step 4. (Page 14)Install the vent system and
exterior termination.
Step 5. (Page 26)Field Wiring
a. Millivolt Appliances – Install the operating
control switch (not factory provided) and bring
inelectricalservicelineforforcedair-circulating
blower (optional equipment).
b. Electronic Appliances – Field wire and install
operating control switch.
Step 6. (Page 27)Install blower kit (optional
equipment).
Step 7. (Page 27)Make connection to gas
supply.
Step 8. (Page 28)Verifying appliance opera-
tion.
Step 9. (Page 29)Install the logs, decorative
volcanic stone and glowing embers.
Step 10. (Page 33) Install glass door as-
sembly.
Step 11. (Page 33) Adjust burner to ensure
proper flame appearance.
Step 12. (Page 35) Install the hoods.
Step 13. (Page 36) Attach Safety in Operation
Warnings.
Before proceeding it may be helpful to remove
the log set form the firebox and remove the
embers and volcanic stone from the control
compartment. Refer to the following steps:
1. Remove the front glass enclosure panel
(see Removing and Installing Glass Enclosure
Panels on Page 33).
2. Remove log set box from firebox. Next,
remove embers and volcanic stone from con-
trol compartment. Handle logs carefully to
prevent breakage.

11
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
PRODUCT REFERENCE INFORMATION
Cat.
No.
Model Ship
Weight
Ship.
Volumn
H3201 MPD35ST-NM 220 lbs 46W x 26D x
43H (30 cu.ft.)
H3202 MPD35ST-PM 220 lbs 46W x 26D x
43H (30 cu.ft.)
H3203 MPD35ST-NE 220 lbs 46W x 26D x
43H (30 cu.ft.)
FIREPLACE SPECIFICATIONS - MPD35ST
NOTES
• Annual Fuel Utilization Efficiency
DuetoLennox'ongoingcommitmenttoquality,
all specifications, ratings and dimensions are
subject to change without notice.
Appliance has a factory-installed vent seal cap
(see Figures 16 & 17 on Page 14)in each flue
outlet.
EFFICIENCIES
61 % Natural Gas
62 % Prop. Gas
• AFUE 65 % Natural Gas
67 % Propane Gas
SPECIFICATIONS
Natural Gas BTU Input 30,000
Propane Gas BTU Input 28,000
Co-axial DV Vent Size 4-1/2" Inner /
7-1/2" Outer
5-5/8
(143)
***39-7/8
(1013)
35-1/4
(895)
**20-3/4
(527)
10-1/2
(267)
12-1/8
(308) 5-1/8
(130)
12-1/8
(308)
25-1/2
(648)
5-1/8
(130)
Vent Center - Top Vent
with one 90 degree
elbow
Vent Center - Side Vent
with no elbows
Secure Vent
42-3/4 (1086)
Secure Flex
43-1/2 (1105)
**This dimension
based on 5/8" drywall.
For 1/2" drywall use
21" (533 mm). The
finished dimension
should be 22" (558
mm)
• Inches (millimeters)
•
Minimum Framing Stud Size is 2 x 4
• See side views of fireplace below for
gas line inlet location options.
Fireplace Framing Specifications
Center of gas line
is 3-1/8 inches
(79 mm) up from
floor.
Notes:
***This dimension does
not include the addition
of drywall to the inside of
framing or clearance for
the Side Vent Seal Cap.
Adjust accordingly for your
installation.
Seealso,SideVentSealCap
note below.
Louvered Control
Compartment Door
Gas Inlet
Control Switch Wires
Knock-Out
Gas
Inlet
Framing Spacers
(top and both sides) Stepped to Accept Drywall
Vent Seal Cap
Top View
Front View
Left Side View Right Side View
Control Switch Wires
Knock-Out
Optional
Blower
Provide additional
space for Side
Vent Seal Cap if
installing against a
solid wall.
22
(559)
35-1/8
(892)
32-5/8
(827)
19
(483)
29 1/2
(749)
39-3/4 (984) 3 (76)
38-3/8 (899)
10-7/8 (264)
11 (279)
(16)
11 (279)
6-1/4
(159) 6-1/4
(159)
25-1/2
(646)
3-1/8 (79) 3-1/8 (79)
5/8
Junction Box Knock-Out
(2 places each side)
Figure 13
Vertical Venting Through the Ceiling:
Frame ceiling opening -Use a plumb line
from the ceiling above the appliance to
locate center of the vertical run. Cut and/or
frame an opening, 10-1/2" x 10-1/2" (267
mm x 267 mm) inside dimensions, about
this center mark (see Figure 20).

12 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
SPECIFICATIONS
Natural Gas BTU Input 30,000
Propane Gas BTU Input 28,000
Co-axial DV Vent Size 4-1/2" Inner /
7-1/2" Outer
EFFICIENCIES
61 % Natural Gas
62 % Prop. Gas
• AFUE 65 % Natural Gas
67 % Propane Gas
FIREPLACE SPECIFICATIONS - MPD35PF
NOTES
• Annual Fuel Utilization Efficiency
DuetoLennox'ongoingcommitmenttoquality,
all specifications, ratings and dimensions are
subject to change without notice.
Appliance has a factory-installed vent seal cap
(see Figures 16 & 17 on Page 14)in each flue
outlet.
5-5/8
(143)
***38-3/4
(984)
35-1/4
(895)
**20-3/4
(527)
10-1/2
(267)
12-1/8
(308) 5-1/8
(130)
12-1/8
(308)
25-1/2
(648)
5-1/8
(130)
Vent Center - Top Vent
with one 90 degree
elbow
Vent Center - Side Vent
with no elbows
Secure Vent
42-3/4 (1086)
Secure Flex
43-1/2 (1105)
**This dimension
based on 5/8" drywall.
For 1/2" drywall use
21" (533 mm). The
finished dimension
should be 22" (558
mm)
• Inches (millimeters)
•
Minimum Framing Stud Size is 2 x 4
• See side views of fireplace below for
gas line inlet location options.
Fireplace Framing Specifications
Center of gas line
is 3-1/8 inches
(79 mm) up from
floor.
Notes:
***This dimension does
not include the addition
of drywall to the inside of
framing or clearance for
the Side Vent Seal Cap.
Adjust accordingly for your
installation.
Seealso,Side VentSealCap
note below.
Figure 14
PRODUCT REFERENCE INFORMATION
Cat.
No.
Model Ship
Weight
Ship.
Volumn
H6945 MPD35PF-NM 220 lbs 46W x 26D x
43H (30 cu.ft.)
H6946 MPD35PF-PM 220 lbs 46W x 26D x
43H (30 cu.ft.)
H6947 MPD35PF-NE 220 lbs 46W x 26D x
43H (30 cu.ft.)
22
(559)
35-1/8
(892)
32-5/8
(827)
19
(483)
29 1/2
(749)
39-3/4 (984) 3 (76)
38-3/8 (899) 11 (279)
6-1/4
(159)
25-1/2
(646)
3-1/8 (79)
Louvered Control
Compartment Door Gas
Inlet
Provide additional
space for Side
Vent Seal Cap if
installing against a
solid wall.
Front View
Left Side View Right Side View
Control Switch Wires
Knock-Out
Junction Box
Knock-Out
10-7/8 (264)
11 (279)
(16)
5/8
Framing Spacers
(top and both sides)
Stepped to Accept Drywall
Vent Seal Cap
Top View
Vertical Venting Through the Ceiling:
Frame ceiling opening -Use a plumb line
from the ceiling above the appliance to
locate center of the vertical run. Cut and/or
frame an opening, 10-1/2" x 10-1/2" (267
mm x 267 mm) inside dimensions, about
this center mark (see Figure 20).

13
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Schedule 40
Black Iron Pipe
Inside Diameter (Inches)
Schedule 40 Pipe
Length (feet)
Natural
Gas
Propane
Gas
0-10 1/2 3/8
10-40 1/2 1/2
40-100 1/2 1/2
100-150 3/4 1/2
150-200 3/4 1/2
Table 6
IMPORTANT: If propane is used, be aware that
if tank size is too small (i.e. under 100-lbs, if
this is the only gas appliance in the dwelling.
Ref. NPFA 58), there may be loss of pressure,
resulting in insufficient fuel delivery (which
can result in sooting, severe delayed ignition
or other malfunctions). Any damage resulting
from an improper installation, such as this, is
not covered under the limited warranty.
Step 3. PREPARING THE APPLIANCE
VENT COLLAR
Proper Sizing of Gas Line
Properly size and route the gas supply line
from the supply regulator to the area where the
appliance is to be installed per requirements
outlined in the National Fuel Gas Code, NFPA
54 - latest edition (USA) or CAN/CSA-B149.1
- latest edition (Canada).
Never use galvanized or plastic pipe. Refer to
Table 6 for proper sizing of the gas supply line,
if black iron pipe is being used. Gas lines must
be routed, constructed and made of materials
that are in strict accordance with local codes
andregulations. Werecommendthataqualified
individual such as a plumber or gas fitter be
hired to correctly size and route the gas supply
line to the appliance.
Also see Figures 13 and 14.
Figure 15 - Route Gas Line
Step 2. ROUTING GAS LINE
Route a 1/2" (13 mm) gas line to the left side
of the appliance as shown in Figure 15. Gas
lines must be routed, constructed and made
of materials that are in strict accordance with
local codes and regulations. All appliances
are factory-equipped with a flexible gas line
connector and 1/2 inch shutoff valve. (See
Step 6 on Page 27).
Installingagassupplylinefromthefuelsupplyto
theapplianceinvolvesnumerousconsiderations
of materials, protection, sizing, locations, con-
trols,pressure,sediment,andmore.Certainlyno
one unfamiliar and unqualified should attempt
sizing or installing gas piping.
5-5/8"
(143 mm)
3-1/8"
(79 mm)
Notes:
• All appliances are factory-equipped with
a flexible gas line connector and 1/2 inch
shutoff valve (see Figure 50 on Page 29).
• SeeMassachusetts Requirements onPage
4foradditionalrequirementsforinstallations
in the state of Massachusetts in the USA.
• ThegassupplylineshouldNotbeconnected
to the appliance until Step 6 (Page 27).
• Apipejointcompoundratedforgasshouldbe
usedonthethreadedjoints.Ensurepropane
resistant compounds are used in propane
applications. Be very careful that the pipe
compound does not get inside the pipe.
• It is recommended to install a sediment
trap in the supply line as close as possible
to the appliance. Appliances using Propane
should have a sediment trap at the base of
the tank.
• Checkwithlocalbuildingofcialforlocal
code requirements (i.e. are below grade
penetrations of the gas line allowed?, etc).
REMOVE VENT SEAL CAP
(From the vent that will be used only)
Top Vent Installations - See Figure 16
Side Vent Installations - See Figure 17
Preparing the Appliance Vent Collar
Each of the appliances' two vent collars are
sealed with a seal cap which must be removed
fromthe ventcollar beingused. Refer toFigure
16 for top vent installations and Figure 17 for
sideventinstallationsandthefollowingstepsto
prepare the appropriate collar for use.
From the vent collar being used, remove the
two screws securing the vent seal cap. Twist
the cap counterclockwise. Pull it away from
the appliance and discard, along with the piece
of insulation.
WARNING
Failure to reinstall and securely
tighten vent seal cap screws
could result in leakage of flue
products into the living space.
Vent seal cap must remain
securely installed on unused
vent collar. Failure to do so
could result in leakage of flue
products into living space.

14 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Securing Screws
(OUTSIDE of
Appli
ance)
Insulation
Top Vent Vent Seal Cap
Firebox Top
Cabinet Top
CROSS SECTION
SIDE VENT SEAL CAP REMOVAL
(SIDE VENT INSTALLATIONS ONLY)
Insulation Vent Seal Cap
Securing Screws
Side Vent
Cabinet Back
CROSS SECTION
(INSIDE of Appli ance)
(OUTSIDE of
Appli
ance)
(INSIDE of
Appli
ance)
Figure 16 -
Figure 17 -
TOP VENT SEAL CAP REMOVAL
(TOPVENT INSTALLATIONS ONLY)
Step 4. INSTALL THE VENT SYSTEM
General Information
Theseinstructionsshouldbeusedas aguideline anddo notsupersede
local codes in any way. Install venting according to local codes, these
instructions, the current National Fuel Gas Code (ANSI-Z223.1) in the
USA or the current standards of CAN/CSA-B149.1 in Canada.
Ensure clearances are in accordance with local installation codes and
the requirements of the gas supplier.
Dégagement conforme aux codes d'installation locaux et aux exigences
du foumisseunde gaz.
Use only approved venting components. See Approved Vent
Components on Page 2.
These fireplaces must be vented directly to the outside.
The vent system may not service multiple appliances, and must never
be connected to a flue serving a solid fuel burning appliance. The vent
pipe is tested to be run inside an enclosed wall (such as a chase). There
is no requirement for inspection openings in the enclosing wall at any of
the joints in the vent pipe.
Installation of Vent Restrictor
A vent restrictor may be needed with this appliance. The restrictor is
installed in the appliance top flue outlet as shown in Figure 16, either
before adding vent, from above, or after installation of vent from below,
within the firebox. The restrictor is self securing through a positive
friction fit.
Determine the venting for the appliance. If the vent run will include at
least 8 feet of vertical rise, then install the restrictor in the appliance
collar before connecting any vent (Refer to Figure 19 ). Place the
restrictor inside the appliance vent collar and press in place.
Note: The restrictor is included within the firebox.
Select Venting System - Horizontal or Vertical
With the appliance secured in framing, determine vent routing and identify
the exterior termination location. The following sections describe vertical
(roof) and horizontal (exterior wall) vent applications. Refer to the section
relating to your installation. A list of approved venting components are
shown on Pages 37 and 38.
Figure 18
Appliance Top
Vent Outlet
Restrictor
Inner
Fireplace
Collar
VENT RESTRICTOR INSTALLATION
A vent restrictor may be needed when vertically terminating the vent
system above the roof (when using the appliance top vent), install a vent
restrictor in the top vent of the fireplace outlet.
If needed, install the restrictor as shown, either from inside or outside the
unit, in the inner fireplace collar.

15
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Note: Convert inches into metric equivalent
measurement, as follows:
Millimeters (mm) = Inches x 25.4
Centimeters (cm) = Inches x 2.54
Meters (M) = Inches x .0254
TRAHCHTGNELNOITCESTNEV
lanimoN htgneLnoitceS )sehcni( 6 21 42 63 84 T
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5.4 573.0 1 0 0 0 0 1
9 57.0 2 0 0 0 0 2
5.01 578.0 0 1 0 0 0 1
51 52.1 1 1 0 0 0 2
5.91 526.1 2 1 0 0 03
12 57.1 0 2 0 0 0 2
5.22 578.1 0 0 1 0 0 1
5.52 521.2 1 2 0 0 0 3
5.13 526.2 0 3 0 0 0 3
5.43 578.2 0 0 0 1 0 1
5.73 521.3 1 1 1 0 0 3
5.34 526.3 0 2 1 0 0 3
54 57.3 0 0 2 0 0 2
5.64 578.3 0 0 0 0 1 1
5.94 521.4 1 0 2 0 0 3
15 52.4 1 0 0 0 1 2
5.55 526.4 0 1 2 0 0 3
75 57.4 0 0 1 1 0 2
66 52.5 0 2 2 0 0 4
5.76 526.5 0 0 3 0 0 3
96 57.5 0 0 0 2 0 2
27 6 1 0 3 0 0 4
5.37 521.6 1 0 0 2 0 3
5.97 526.6 0 1 0 2 0 3
18 57.6 0 0 0 1 1 2
09 5.7 0 2 1 0 1 4
5.
19 526.7 0 0 2 0 1 3
39 57.7 0 0 0 0 2 2
69 8 1 0 1 2 0 4
5.79 521.8 1 0 0 0 2 3
201 5.8 2 0 0 0 2 4
5.301 526.8 0 0 0 3 0 3
801 9 1 0 0 3 0 4
411 5.9 0 2 0 0 2 4
711 57.9 1 0 5 0 0 6
5.811 578.9 1 1 0 3 0 5
621 5.01 0 0 1 3 0 4
5.031 578.01 1 0 1 3 0 5
531 52.11 0 0 6 0 0 6
831 5.11 0 0 0 4 0 4
5.931 526.11 0 0 0 0 3 3
5.241 578.11 1 0 0 4 0 5
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441 21 1 0 0 0 3 4
051 5.21 0 1 0 0 3 4
5.451 578.21 1 1 0 0 3 5
5.061 573.31 0 2 0 0 3 5
5.271 573.41 0 0 0 5 0 5
771 57.41 1 0 0 5 0 6
381 52.51 0 1 0 5 0 6
681 5.51 0 0 0 0 4 4
5.091 578.51 1 0 0 0 4 5
5.691 573.61 0 1 0 0 4 5
5.502 521.71 0 1 1 5 0 7
702 52.71 0 0 0 6 0 6
5.112 526.71 1 0 0 6 0 7
5.712 521.81 0 1 0 6 0 7
5.922 521.91 0 0 1 6 0 7
5.232 573.91 0 0 0 0 5 5
732 57.91 1 0 0 0 5 6
5.142 521.02 0 0 0 7 0 7
642 5.02 1 0 0 7 0 8
252 12 0 1 0 7 0 8
462 22 0 0 1 7 0 8
672 32 0 0 0 8 0 8
972 52.32 0 0 0 0 6 6
5.
082 573.32 1 0 0 8 0 9
5.382 526.32 1 0 0 0 6 7
5.982 521.42 0 1 0 0 6 7
5.103 521.52 0 0 1 0 6 7
5.013 578.52 0 0 0 9 0 9
513 5.62 1 0 0 9 0 01
5.523 521.72 0 0 0 0 7 7
033 5.72 1 0 0 0 7 8
633 82 0 1 0 0 7 8
543 57.82 0 0 0 01 0 01
5.943 521.92 1 0 0 01 0 11
273 13 0 0 0 0 8 8
5.673 573.13 1 0 0 0 8 9
5.973 526.13 0 0 0 11 0 11
5.814 578.43 0 0 0 0 9 9
324 52.53 1 0 0 0 9 01
564 57.83 0 0 0 0 01 01
SV4.5CGV-1
Termination SV4.5FA OR
SV4.5FB Flashing
AND SV4.5SC
STORM COLLAR
*SV4.5VF
Firestop/Spacer
SV4.5L6/12/24/36/48
Vent Sections
40' Max
(12.2 M)
1" (25.4 mm)
Minimum
Clearance to
Combustibles
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
Effective Vent Length
Model Effective Length
SV4.5L6 4-1/2"
SV4.5L12 10-1/2"
SV4.5L24 22-1/2"
SV4.5L36 34-1/2"
SV4.5L48 46-1/2"
Table 7
Figure 19
VERTICAL TERMINATION SYSTEMS (ROOF)
See Figure 19 and Figures 29 through 34 on
Pages 18, 19 and 20 and their associated
Vertical Vent Tables which illustrate the various
verticalventingconfigurations thatarepossible
for use with these appliances. Secure Vent™
pipe applications are shown in these Figures;
SecureFlex™pipemayalsobeused. AVertical
VentTablesummarizeseachsystem’sminimum
and maximum vertical and horizontal length
values that can be used to design and install the
vent components in a variety of applications.
Both these vertical vent systems terminate
through the roof. The minimum vent height
above the roof and/or adjacent walls is speci-
fied in ANSI Z223.1-(latest edition) (In Canada,
the current CAN/CSA-B149.1 installation code)
by major building codes. Always consult your
localcodes forspecific requirements.Ageneral
guide to follow is the Gas Vent Rule (refer to
Figure 5 on Page 6).
Vertical (Straight) Installation
(Figure 19)
Determine the number of straight vent sec-
tions required. 4-1/2" (114 mm), 10-1/2" (267
mm), 22-1/2" (572 mm), 34-1/2" (876 mm)
and 46-1/2" (1181 mm) net section lengths
are available (see Tables on this page and
Page 37 - Rigid Vent Sections). Plan the vent
lengths so that a joint does not occur at the
intersection of ceiling or roof joists. Refer to
the Vent Section Length Chart.

16 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
First Vent
Component
Align the dimple (four places)
with the opening of the locking
incline channel on appliance
collar. Twist vent component
clockwise to engage and seal.
Locking
Incline Channel
Dimple
Appliance collar
Vent / Appliance Collar
Connection
Align the dimple (four places) of the
upper vent section with the opening of
the locking incline channel on the
lower vent section. Twist vent
component clockwise to engage and
seal until arrow and dimple align.
Locking
Incline Channel
Dimple
Arrow
Connected
Vent Sections
Vent / Vent Section
Connection
Arrow
Arrow
Figure 20
Figure 21
Figure 23
Figure 22
C. Attach vent components to each other
-Other vent sections may be added to the
previously installed section in accordance with
the requirements of the vertical vent figures
and tables. To add another vent component
to a length of vent run, align the dimpled end
over the inclined channel end of the previously
installed section, adjusting the radial alignment
until the four locking dimples are aligned with
the inlets of the four incline channels of the
previous section.
Push the vent component against the previous
section until it fully engages, then twist the
componentclockwiserunningthedimplesdown
and along the incline channels until they seat at
the end of the channels.This seating position
is indicated by the alignment of the arrow and
dimple as shown in Figure 22.
D. Install firestop/spacer at ceiling - When
usingSecureVent,useSV4.5VFfirestop/spacer
at ceiling joists; when using Secure Flex, use
SF4.5VF firestop/spacer. If there is living space
above the ceiling level, the firestop/spacer
must be installed on the bottom side of the
ceiling. If attic space is above the ceiling, the
firestop/spacermustbeinstalledonthetopside
of the joist. Route the vent sections through the
framed opening and secure the firestop/spacer
with 8d nails or other appropriate fasteners at
each corner. Remember to maintain 1" (25
mm) clearance to combustibles, framing
members, and attic or ceiling insulation
when running vertical chimney sections.
Attic insulation shield (96K94) may be used
to obtain the required clearances indicated
here. See installation accessories tables on
pages 37 and 38.
Vertical (Offset) Installation
Analyze the vent routing and determine the
quantities of vent sections and number of el-
bows required. Refer to Vertical Vent Figures
and Tables on page 15 to select the type of
vertical installation desired. Vent sections are
available in net lengths of 4-1/2" (114 mm),
10-1/2" (267 mm), 22-1/2" (572 mm), 34-1/2"
(876 mm) and 46-1/2" (1181 mm). Refer to the
Effective Vent Length Chart on page 15 for an
aidinselectinglengthcombinations.Elbowsare
available in 90° and 45° configurations. Refer
to Figure 24 for the SV4.5E45 and SV4.5E90
elbow dimensional specifications.
Where required, a telescopic vent section
(SV4.5LA) may be used to provide the installer
withanoptionininstalling intight and confined
spaces or where the vent run made up of fixed
length pieces develops a joint in a undesirable
location, or will not build up to the required
length. The SV4.5LA Telescopic Vent Section
has an effective length of from 1-1/2" (38 mm)
to 7-1/2" (191 mm). The SV4.5LA is fitted with
a locking inclined channel end (identical to a
normalventsectioncomponent)andaplainend
with 3 pilot holes. Slip the plain end over the
locking channel end of a standard SV4.5 vent
component the required distance and secure
with three screws.
Maintain a minimum 1" (25 mm) clearance to
combustiblematerialsfor allvertical elements.
Clearances for all horizontal elements are 3"
(76 mm) on top, 1" (25 mm) on sides and 1"
(25 mm) on the bottom.
A. Frame ceiling opening - Use a plumb line
from the ceiling above the appliance to locate
center of the vertical run. Cut and/or frame an
opening, 10-1/2" x 10-1/2" (267mm x 267mm)
inside dimensions, about this center mark
(Figure 20 ).
To attach a vent component to the appliance
collar, align the dimpled end over the collar,
adjusting the radial alignment until the four
locking dimples are aligned with the inlet of
the four inclined channels on the collar (refer to
Figure 21). Push the vent component against
the collar until it fully engages, then twist the
component clockwise, running the dimples
down and along the incline channels until they
seat at the end of the channels. The unitized
design of the Secure Vent components will
engage and seal both the inner and outer pipe
withouttheneedforsealantorscrews. Ifdesired
a #6 x 1/2" screw may be used at the joint, but
it is not required as the pipe will securely lock
when twisted.
Note: An elbow may also be attached to the
appliance collar. Attach in the same manner
as you would a vent section.
B. Attach vent components to appliance
-SecureVentSV4.5direct ventsystemcompo-
nents are unitized concentric pipe components
featuring positive twist lock connections (see
Figures 21 and 22 ).
All of the appliances covered in this document
are fitted with collars having locking inclined
channels. The dimpled end of the vent com-
ponents fit over the appliance collar to create
the positive twist lock connection.
1” (25.4 mm)
Minimum
Clearance to
Combustibles
8 ft. (2.4 M)
Maximum
vSV4.5VF
Firestop / spacer
uSV4.5SP
Support Plate
uSV4.5SU
Support Strap
Shown With
Optional
Radiant
Panels
uSecured
to Vent with
Appropriate
Fasteners
Ceiling
Framing
vWhen
using
secure
Flex, use
Firestop/
Spacer
SF4.5VF
SV4.5FA or
SV4.5FB Flashing
andSV4.5SC
Storm Collar
SV4.5CGV-1
Termination
10-1/2" Min.
(267 mm)
10-1/2" Min.
(267 mm)

17
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Framing Dimensions for Roof
Pitch C D
0/12 10-1/2 in. 10-1/2 in.
(267 mm) (267 mm)
6/12 10-1/2 in. 12 in.
(267 mm) (305 mm)
12/12 10-1/2 in. 17-3/4 in.
(267 mm) (451 mm)
Figure 25
Figure 26
Figure 28
Figure 27
If the vent system extends more than 5' (1.5
m) above the roof flashing, stabilizers may be
necessary. Additional screws may be used at
section joints for added stability. Guide wires
may be attached to the joint for additional sup-
port on multiple joint configurations.
G.Continueinstallationofhorizontal/inclined
sections - Continue with the installation of the
straight vent sections in horizontal/inclined run
as described in Step C. Install support straps
every 5'(1.52 m)along horizontal/inclinedvent
runs using conventional plumber’s tape. It is
very important that the horizontal/inclined
run be maintained in a straight (no dips) and
slightly elevated plane in a direction away
from the fireplace 1/4" per foot (20 mm per
meter) of horizontal vent.Use a carpenter’s
level to measure from a constant surface and
adjust the support straps as necessary.
It is important to maintain the required clear-
ancestocombustibles:1"(25mm) atallsides
for all vertical runs; and 3" (76 mm) at the top,
1" (25 mm) at sides, and 1" (25 mm) at the
bottom for all horizontal/inclined runs.
F.Changeventdirectiontohorizontal/inclined
run - At transition from or to a horizontal/in-
clined run, install the SV4.5E45 and SV4.5E90
elbows in the same manner as the straight vent
sections. The elbows feature a twist section to
allow them to be routed about the center axis
of their initial collar section to align with the
required direction of the next vent run element.
Twist elbow sections in a clockwise direction
only so as to avoid the possiblity of unlocking
anyofthepreviouslyconnectedventsections.
See Figure 24.
E. Support the vertical vent run sections -
Note-Properventingsupportisveryimportant.
The weight of the vent must not be supported
by the fireplace in any degree.
Support the vertical portion of the venting
system every 8 feet (2.4m) above the fireplace
vent outlet. One method of support is by utiliz-
ing field provided support straps (conventional
plumber's tape). Secure the plumber's tape to
the framing members with nails or screws.
Loop the tape around the vent, securing the
ends of the tape to the framing. If desired,
sheet metal screws #6 x 1/2" length may be
used to secure the support straps to the vent
pipe. See Figure 23.
Figure 24
SV4.5E90
(90
° Elbow)
8-1/8"
(206 mm)
Swivel Joint
(360
° swivel)
4-13/16"
(122 mm)
SV4.5E45
(45
° Elbow)
Swivel Joint
(360
° swivel)
C
D
Storm
Collar
K. Install the vertical termination - The final
step involves installation of the SV4.5CGV-1
Vertical Termination. Extend the vent sections
to the height as shown in the "Vertical vent ter-
mination section" on page 6. The SV4.5CGV-1
Vertical Termination (Figure 28 ) installs in the
exact same fashion as any other Secure Vent
section. Align the termination over the end of
the previously installed section, adjusting the
radial alignment until the four locking dimples
of the termination are aligned with the inlets of
thefourinclinechannelsofthelastventsection.
Pushtheterminationdownuntilitfullyengages,
thentwisttheterminationclockwiserunningthe
dimples down and along the incline channels
until they seat at the end of the channels.
I. Install the roof flashing - Extend the vent
sections through the roof structure. Install the
roof flashing over the vent section and posi-
tion such that the vent column rises vertically
(use carpenters level) (Figure 26 ). Nail along
perimeter to secure flashing or adjust roofing
to overlap the flashing edges at top and sides
only and trim where necessary. Seal the top
and both sides of the flashing with waterproof
caulking.
J. Install the storm collar - Install the storm
collar, supplied with the flashing, over the
vent/flashing joint. See Figure 27. Loosen the
storm collar screw. Slide collar down until it
meetsthetopoftheflashing.Tightentheadjust-
ing screw. Apply non-combustible caulking or
mastic around the circumference of the joint
to provide a water tight seal.
H. Frame roof opening - Identify location for
vent at the roof. Cut and/or frame opening per
Roof Framing Chart and Figure 25.

18 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
VERTICAL VENT FIGURES/TABLES
Note: Secure Vent (rigid vent pipe) is shown
in the figures; Secure Flex (flexible vent pipe)
may also be used.
Note: It is very important that the horizontal/in-
clinedrunbemaintainedinastraight(nodips)
and recommended to be in a slightly elevated
plane, in a direction away from the fireplace of
1/4" rise per foot (20 mm per meter) which is
ideal, though rise per foot run ratios that are
smaller are acceptable all the way down to at
or near level.
Note: SV4.5VF (Secure Vent), SF4.5VF (Secure
Flex)firestop/spacermustbeusedanytimevent
pipe passes through a combustible floor or ceil-
ing. SV4.5HF (Secure Vent), SF4.5HF (Secure
Flex)firestop/spacer must be used anytime vent
pipe passes through a combustible wall.
Note: Two 45 degree elbows may be used in
place of one 90 degree elbow. The same rise
to run ratios, as shown in the venting figures
for 90 elbows, must be followed if 45 degree
elbows are used.
Note: An elbow is acceptable as 1 foot of
vertical rise, except where an elbow is the
only vertical component in the system. (See
Figure 38 on page 22 ).
WARNING
Undernocircumstances,maysepa-
rate sections of concentric flexible
vent pipe be joined together.
H
V
V1
V
H
Figure 29 - Top Vent - STRAIGHT
Figure 31 - Top Vent - TWO 90 DEGREE ELBOWS
40 feet
(12.2 meters)
Maximum
uCeiling Firestop /
Spacer (SV4.5VF)
uWhenusingSecureFlex,use
Firestop/Spacer SF4.5VF
uCeiling Firestop /
Spacer (SV4.5VF)
vWall Firestop/
Spacer (SV4.5HF)
uCeiling Firestop / Spacer (SV4.5VF)
uWhen using Secure Flex, use
Firestop / Spacer SF4.5VF.
vWhen using Secure Flex, use
Firestop / Spacer SF4.5HF.
Example: If 20 feet of (H) hori-
zontal vent run is needed, then 4
feet minimum of (V) vertical vent
will be required.
This table shows a 1(V) to 5(H)
ratio. For every 1 foot of (V) verti-
cal, you are allowed 5 feet of (H)
horizontal run, up to a maximum
horizontal run of 20 feet.
An elbow is acceptable as 1 foot
of vertical rise except where
an elbow is the only vertical
component in the system. See
Figure 38.
Table B
H Maximum V Minimum
feet (meter) feet (meter)
5 (1.524) Elbow Only
5 (1.524) 1 (0.305)
10 (3.048) 2 (0.610)
15 (4.572) 3 (0.914)
20 (6.096) 4 (1.219)
V + V1+ H = 40 feet (12.2 m) Max.
H = 20 feet (6.096 meters) Max.
Table A
H Maximum V Minimum
feet (meter) feet (meter)
2 (0.610) 1 (0.305)
4 (1.219) 2 (0.610)
6 (1.829) 3 (0.914)
8 (2.438) 4 (1.219)
V + H = 40 feet (12.2 meters) Max.
H = 8 feet (2.4 meters) Max.
Ratio V to H ratio is 1:2
uWhen using Secure Flex, use Firestop /
Spacer SF4.5VF.
Example: If 8 feet of (H) horizontal vent run is needed, then 4 feet minimum (V) vertical vent will be
required.
This table shows a 1(V) to 2(H) ratio. For every 1 foot of (V) vertical, you are allowed 2 feet of (H)
horizontal run, up to a maximum horizontal run of 8 feet.
Figure 30 - Side Vent - ONE 90 DEGREE ELBOW

19
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
VERTICAL VENT FIGURES / TABLES (CONTINUED)
H1
V
V1
H
Table C
H+H1Maximum H Maximum V Minimum
feet (meter) feet (meter) feet (meter)
5 (1.524) 2 (0.610) 1 (0.305)
10 (3.048) 4 (1.219) 2 (0.610)
15 (4.572) 6 (1.829) 3 (0.914)
20 (6.096) 8 (2.438) 4 (1.219)
V + V1 + H + H1= 40 feet (12.2 m) Max
H = 8 feet (2.438 meters) Max.
H + H1= 20 feet (6.096 meters) Max.
Example: If 20 feet total (H+H1) horizontal vent run is needed,
then 4 feet minimum of (V) vertical vent will be required.
This table shows a 1(V) to 5(H) ratio. For every 1 foot of (V)
vertical, you are allowed 5 feet of (H+H1) horizontal run up to a
maximum total horizontal run of 20 feet.
Figure 32 - Side Vent - THREE ELBOWS
uWhen using Secure Flex, use Firestop / Spacer SF4.5VF
vWhen using Secure Flex, use Firestop / Spacer SF4.5HF
uCeiling Firestop /
Spacer (SV4.5VF)
uCeiling Firestop /
Spacer (SV4.5VF)
vWall Firestop/
Spacer (SV4.5HF)
Table D
H + H1Maximum V Minimum
feet (meter) feet (meter)
5 (1.524) Elbow Only
5 (1.524) 1 (0.305)
10 (3.048) 2 (0.610)
15 (4.572) 3 (0.914)
20 (6.096) 4 (1.219)
H + H1= 20 feet (6.096 m) Max.
V + V1+ H + H1= 40 ft. (12.192 m) Max.
V
H1
H
V1
uCeiling
Firestop / Spacer
(SV4.5VF) vWall Firestop/
Spacer (SV4.5HF)
Example: If 20 feet total (H+H1) horizontal vent run is needed, then 4 feet minimum
of (V) vertical vent will be required.
This table shows a 1(V) to 5(H) ratio. For every 1 foot of (V) vertical, you are allowed
5 feet of (H+H1) horizontal run up to a maximum total horizontal run of 20 feet.
An elbow is acceptable as 1 foot of vertical rise except where an elbow is the only
vertical component in the system. See Figure 38.
Figure 33- Top Vent - THREE ELBOWS
uWhen using Secure Flex, use Firestop / Spacer SF4.5VF
vWhen using Secure Flex, use Firestop / Spacer SF4.5HF

20 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
The unitized design of the Secure Vent compo-
nents will engage and seal both the inner and
outer pipe elements with the same procedure.
Sealant and securing screws are not required.
Note: An elbow may also be attached to the
appliance collar. Attach in the same manner
as you would a vent section.
Remember to maintain 1" (25 mm) clearance
to combustibles, framing members, and attic
or ceiling insulation when running vertical
chimney sections.
HORIZONTAL (OUTSIDE WALL)
TERMINATION SYSTEM
F. Install firestop/spacer at ceiling -
Whenusing SecureVent,useSV4.5VFfirestop/
spacerat ceilingjoists; whenusingSecureFlex,
use SF4.5VF firestop/spacer. If there is living
space above the ceiling level, the firestop/
spacer must be installed on the bottom side of
the ceiling. If attic space is above the ceiling,
the firestop/ spacer must be installed on the
top side of the joist. Route the vent sections
through the framed opening and secure the
firestop/spacerwith8dnailsorotherappropriate
fasteners at each corner.
SecureVentSV4.5directventsystemcomponents
areunitizedconcentricpipecomponentsfeaturing
positivetwistlockconnection,(refer to Figure 21
onpage 16). All oftheappliancescoveredinthis
document are fitted with collars having locking
inclined channels. The dimpled end of the vent
componentsfitovertheappliancecollartocreate
the positive twist lock connection.
A. Plan the vent run -
Analyze the vent routing and determine the
types and quantities of sections required
4-1/2"(114mm),10-1/2" (267 mm), 22-1/2" (572
mm),34-1/2"(876mm)and46-1/2"(1181mm)net
section lengths are available. It is recommended
that you plan the venting so that a joint does not
occur intheceilingorroofjoists. Allow forelbows
as indicated in Figure 24 on page 17.
Maintain a minimum 1" (25 mm) clearance to
combustiblesontheverticalsections.Clearances
forthehorizontalrunsare;3"(76mm)ontop,1"(25
mm) on sides, and 1" (25 mm) at the bottom.
B. Frame exterior wall opening -
Locate the center of the vent outlet on the exte-
rior wall according to the dimensions shown in
Figures 13 & 14 on pages 11 & 12. Cut and/or
frame an opening, 10-1/2" x 12-1/8" (267 mm x
308mm) inside dimensions, about this center.
C. Frame ceiling opening - If the vertical route
istopenetrateaceiling,useplumblinetolocate
thecenterabovetheappliance.Cutand/orframe
an opening, 10-1/2" x 10-1/2" (267 mm x 267
mm)insidedimensions,aboutthiscenter(refer
to Figure 20 on page 16 ).
G. Support the vertical run sections -
On the vertical run, support the venting sys-
tem every 8 feet (2.4m) above the fireplace
vent outlet with field provided support straps
(Plumber's tape). Attach the straps to the vent
pipe and secure to the framing members with
nails or screws. See Figure 23 on page 16.
H. Change vent direction - At transition
from or to a horizontal/inclined run, install the
SV4.5E45 and SV4.5E90 elbows in the same
manner as the straight vent sections. The
elbows feature a twist section to allow them
to be routed about the center axis of their
initial collar section to align with the required
direction of the next vent run element. Twist
elbow sections in a clockwise direction only
so as to avoid the possiblity of unlocking any
of the previously connected vent sections.
See Figure 24 on page 15.
I. Continueinstallationof horizontal/inclined
sections - Continue with the installation of the
straightventsectionsinhorizontal/inclinedrun
as described in Step E. Install support straps
every 5 ft. (1.52 m) along horizontal/inclined
vent runs using conventional plumber’s tape.
See Figure 34,it is very important that the
horizontal/inclined run be maintained in a
straight (no dips) and recommended to be in
a slightly elevated plane, in a direction away
from the fireplace of 1/4" rise per foot (20 mm
per meter) which is ideal, though rise per foot
runratios thatare smallerareacceptable allthe
way down to at or near level. Use a carpenter’s
level to measure from a constant surface and
adjust the support straps as necessary.
E. Attachventcomponentstoeachother-Other
vent sections may be added to the previously
installed section in accordance with the require-
ments of the vent tables. To add another vent
component to a length of vent run, align the
dimpled end of the component over the inclined
channel end of the previously installed section,
adjustingtheradialalignmentuntilthefourlock-
ingdimplesarealignedwiththeinletsofthe four
incline channels of the previous section. Push
theventcomponentagainsttheprevioussection
until it fully engages, then twist the component
clockwise running the dimples down and along
the incline channels until they seat at the end of
the channels.This seating position is indicated
by the alignment of the arrow and dimple as
shown in Figure 22 on page 16.
D. Attach vent components to appliance - To
attach a vent component to the appliance collar,
alignthedimpledendoverthecollar,adjustingthe
radialalignmentuntilthefourlockingdimplesare
alignedwiththe inletsofthefour incline channels
on the collar (refer to Figure 21 on page 16 ).
Bothofthese horizontalventsystemsterminate
through an outside wall. Building Codes limit or
prohibit terminating in specific areas. Refer to
Figure 6 and page 7 for location guidelines.
Figures 34, and Figures 37 to 42 on pages
22 to 24 and their associated Horizontal Vent
Table illustrate the various horizontal venting
configurations that are possible for use with
theseappliances. SecureVentpipeapplications
are shown in these figures; Secure Flex pipe
may also be used. A Horizontal Vent Table sum-
marizeseachsystem’sminimumandmaximum
vertical and horizontal length values that can be
used to design and install the vent components
in a variety of applications.
Push the vent component against the collar until it
fullyengages, thentwistthecomponentclockwise,
runningthedimplesdownandalongtheinclinechan-
nels until they seat at the end of the channels.
It is important to maintain the required clear-
ancesto combustibles:1"(25 mm)atallsides
for all vertical runs; and 3" (76 mm) at the top,
1" (25 mm) at sides, and 1" (25 mm) at the
bottom for all horizontal/inclined runs
Figure 34 -TYPICAL HORIZONTAL VENT INSTALLATION
Horizontal / Inclined Run
Support
Brackets
Building
Support
Framing
SV4.5E90
Elbow
Ceiling uFirestop / Spacer
SV4.5VF
uWhen Using Secure Flex,
Use Firestop / Spacer SF4.5VF
Fireplace
SV4.5L6/12/24/36/48
Vent Sections
Vertical
Rise
SV4.5HT-2
Termination
Shown
Support Bracket Spacing
Every 5 ft (1.52 m)
Exterior
Wall
SV4.5HT-2
Termination
Shown
Shown With Optional Radiant Panels
See Figure 23 on Page 16 for
vertical vent section support.