Lennox Hearth Products MPDT-3328CPM-B User manual

MODELS
OTL Report No. 116-F-13-4
US
Portland
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
MPD Direct-Vent
Gas Fireplaces
MILLIVOLT: ELECTRONIC:
MPDT-3328CNM-B
MPDT-3328CPM-B
MPDR-3328CNM-B
MPDR-3328CPM-B
MPD-3530CNM-B
MPD-3530CPM-B
MPD-4035CNM-B
MPD-4035CPM-B
MPD-4540CNM-B
MPD-4540CPM-B
MPDT-3328CNE-B
MPDT-3328CPE-B
MPDR-3328CNE-B
MPDR-3328CPE-B
MPD-3530CNE-B
MPD-3530CPE-B
MPD-4035CNE-B
MPD-4035CPE-B
MPD-4540CNE-B
MPD-4540CPE-B
P/N 850014 Rev. U 01/2011
This manual is one of a set of two supporting this product.
Refer to P/N 875014M for Care and Operation Instructions.
Ce manuel est disponible en francais, simplement
en faire la demande. Numéro de la pièce 850014CF.
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.

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 10
Typical Installation Sequence ...........Page 10
Step 1. Framing.................................Page 10
Fireplace and Framing Specifications .Page 11
Step 2. Routing Gas Line ..................Page 12
Step 3. Appliance Vent Collar............Page 13
Step 4. Install The Venting System ...Page 13
Vertical Termination Systems............Page 14
Vent Section Length Chart ................Page 14
Vertical Vent Tables and Figures........Page 17
Horizontal Termination System .........Page 19
Horizontal Vent Tables and Figures ...Page 21
Venting Using Flexible Vent Pipe.......Page 24
Step 5. Field Wiring.........................Page 25
Step 6. Optional Blower Kit Wiring..Page 26
Step 7. Connecting Gas Line...........Page 26
Step 8. Verifying Appliance Operation Page 27
Step 9. Installing Logs ...................Page 28
Step 10. Remove/Install Glass Door .Page 32
Step 11. Burner Adjustments ............Page 32
Step 12. Hood Installation.................Page 34
Finishing Requirements ....................Page 34
Step 13. Attaching Safety-in-
Operation Warnings................. Page 35
Installation Accessories ....................Page 36
Gas Conversion Kits .................. Page 38
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 13 ;restrictor istapedto 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 posent lestempératures
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
ALTERATION MAY VOID THE WARRANTY,
CERTIFICATION 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, bedding
material,etcetera. Itisimperativethatcontrol
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’appareildevraitfairel’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 commandeettoute commande
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-Test Laboratories, Inc. (Report No.
116-F-13-4) 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
service and proper operation. Never obstruct
the 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.
Millivoltmodelscomestandardwithamanually-
modulatedgasvalve;flameappearanceandheat
outputcanbecontrolledatthegasvalve.TheBTU
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/HR) Gas Valves (all models)
Models Input Rate (BTU / HR)
Nat. Gas Prop. Gas
MPDT/R-3328
(Millivolt) 17,500 high 11,700 low 17,500 high 14,000 low
MPD-3530
(Millivolt) 20,000 high 12,800 low 20,000 high 15,200 low
MPD-4035
(Millivolt) 27,000 high 18,500 low 27,000 high 21,500 low
MPD-4540
(Millivolt) 29,000 high 20,500 low 29,000 high 22,500 low
MPDT/R-3328
(Electronic) 17,500 17,500
MPD3530
(Electronic) 20,000 20,000
MPD4035
(Electronic) 27,000 27,000
MPD4540
(Electronic) 29,000 29,000
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.
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 ).
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).
For elevations above 4500 feet, contact your
gas supplier or qualified service technician.
Deration - At higher elevations, the amount
of BTU fuel value delivered must be reduced
by either using gas that has been derated by
the gas company or by changing the burner
orifice to a smaller size as regulated by the
local authorities having jurisdiction and by the
(USA) National Fuel Gas Code NFPA 54/ANSI
Z223.1 - latest edition or, in Canada, the 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
IntheCommonwealth ofMassachusetts,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 Manifold Pressure Port
OFF
IN
PSI
ON
CONTROL
IGNITER
Inlet
Pressure
Port
Electronic
Gas Control
Valve
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
Elevation 0-4500 feet ( 0-1372 meters)
Model
Series
Nat.Gas
drill size (inches)
Propane
drill size (inches)
MPDT-3328
MPDR-3328
#45 (0.0820")*
39L66•
0.048 inch
99K78•
MPD-3530 #44 (0.0860")*
60J80•
#55 (0.0520")*
19L52•
MPD-4035 #37 (0.1040")*
24M10•
0.063 inch
21L01•
MPD-4540 #36 (0.1065")*
18L40•
#52 (0.0635")*
37G00•
Table 4 * Standard size installed at factory
• Part /Cat. Number

5
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
HORIZONTAL VENT
(Rear Vent Application with a chase) HORIZONTAL VENT
(Top Vent Application)
VERTICAL VENT
(Top Vent Application)
(Rear Vent Application)
VERTICAL VENT (Rear Vent Application without a chase)
HORIZONTAL VENT
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).
Enraisondestempératuresélevées,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. Util-
ity shelves like these are commonly used for
locat-ing television sets and decorative plants.
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.
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
Thisappliancemaybeinstalledinanaftermarket
permanently located, manufactured home and
must be installed in accordance with the manu-
facturer's instructions and the Manufactured
Home Construction and Safety Standard, Title
24 CFR, Part 3280, in the United States, or the
StandardforInstallationinMobileHomes,CAN/
CSA Z240 MH Series, in Canada.
Cetappareilpeutêtreinstallécómmedumatéri-
eld'originedansunemaison préfabriquée (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 - Typical Locations
APPLICATION
REAR VENT
APPLICATION
TOP VENT
APPLICATION
TOP VENT
REAR VENT
APPLICATION
TOP VENT
APPLICATION
RECESSED
INSTALLATION
TOP VENT
APPLICATION
APPLICATION
TOP VENT
APPLICATION
TOP VENT

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
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 37 on Page 20 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 Figure 7 on Page 7.
Figure 4 - Multiple Terminations
12”
(305mm)
Minimum

7
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
EXTERIOR HORIZONTAL VENT TERMINATION CLEARANCE REQUIREMENTS
Figure 7
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.
E
*noitallatsnInaidanaC **noitallatsnISU
.ynoclabro,kced,hcrop,adnarev,edargevobaecnaraelC=A *)mc03(sehcni21 **)mc03(sehcni21
.denepoebyamtahtroodrowodniwotecnaraelC=B secnailpparof)mc51(sehcni6
)mc03(sehcni21,)Wk3(hutB000,01<
)Wk3(hutB000,01>secnailpparof
secnailpparof)mc51(sehcni6
)mc32(sehcni9,)Wk3(hutB000,01<
dna)Wk3(hutB000,01>secnailpparof
)mc03(sehcni21,)Wk51(hutB000,05<
**)Wk51(hutB000,05>secnailpparof
wodniwdesolcyltnenamrepotecnaraelC=C otdednemmocer)mm503(sehcni21
noitasnednocwodniwtneverp
otdednemmocer)mm922(sehcni9
noitasnednocwodniwtneverp
ehtevobadetacoltiffosdetalitnevotecnaraelclacitreV=D
)mm854(sehcni81foecnatsidlatnozirohanihtiwnoitanimret
)mm854(sehcni81 )mm854(sehcni81
tiffosdetalitnevnuotecnaraelC=E )mm503(sehcni21 )mm503(sehcni21
renrocedistuootecnaraelC=F muminim)mc7.21(sehcni5 muminim)mc7.21(sehcni5
renrocedisniotecnaraelC=G •2-TH5.4VS-muminim)mc80.5(sehcni2
SSTH5.4VS-muminim)mc2.51(sehcni6
•2-TH5.4VS-muminim)mc80.5(sehcni2
SSTH5.4VS-muminim)mc2.51(sehcni6
evobadednetxeenilretnecfoedisnihcaeotecnaraelC=H
ylbmessarotaluger/retem
teef51fothgiehanihtiw)mc19(teef3
*ylbmessarotaluger/retemehtevoba
teef51fothgiehanihtiw)mc19(teef3
**ylbmessarotaluger/retemehtevoba
teltuotnevrotalugerecivresotecnaraelC=I *)mc19(teef3 **)mc19(teef3
rognidliubottelniylppusrialacinahcemnonotecnaraelC=J
ecnailpparehtoynaottelnirianoitsubmoceht
secnailpparof)mc51(sehcni6
)mc03(sehcni21,)Wk3(hutB000,01<
)Wk3(hutB000,01>secnailpparof
secnailpparof)mc51(sehcni6
)mc32(sehcni9,)Wk3(hutB000,01<
dna)Wk3(hutB000,01>secnailpparof
)mc03(sehcni21,)Wk51(hutB000,05<
**)Wk51(hutB000,05>secnailpparof
telniylppusrialacinahcemaotecnaraelC=K *)m38.1(teef6 )
m3(teef01nihtiwfievoba)mc19(teef3
**yllatnoziroh
detacolyaweviddevaproklawedisdevapevobaecnaraelC=L
ytreporpcilbupno
‡)m31.2(teef7 ‡)m31.2(teef7
ynoclabrokced,hcrop,adnarevrednuecnaraelC=M ‡*)mc03(sehcni21 ‡)mc03(sehcni21
)mumixaM(evoclAfohtpeD=N *)m38.1(teef6 **)m38.1(teef6
)evoclA(noitanimreTotecnaraelC=O *)mm2.51(sehcni6 **)mm2.51(sehcni6
)muminiM(evoclAfohtdiW=P *)mc19(teef3 *)mc19(teef3
)evoclA(evobAelbitsubmoCotec
naraelC=Q *)mm754(sehcni81 **)mm754(sehcni81
.edoCnoitallatsnIenaporPdnAsaGlanoitaN1.941B-ASCtnerrucehthtiwecnadroccanI*
.sedoCsaGleuFlanoitaN45APFN/1.322ZSISNAtnerucehthtiwecnadroccanI**
htobsevresdnasgnillewdylimafelgnisowtneewtebdetacolsihcihwyawevirddevaproklawedisaevobayltceridetanimrettonllahstnevA‡
.sgnillewd
.roolfehthtaenebsedis2muminimanonepoyllufsiynoclabrokced,hcrop,adnarevfidettimrepylnO‡*
.ylnO2-TH5.4VSrofselbitsubmoC-noNotecnaraelChcni2•

8NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Models Combustible Shelf Height - Inches (millimeters)
Top Vent - With One 90 Degree Elbow Rear Vent - Straight Out The Back
Secure Vent Secure Flex Secure Vent Secure Flex
MPDT-3328
MPDR-3328 44-1/2 (1130) 46-1/4 (1175) 33-1/4 (845) 33-1/4 (845)
MPD-3530 46-1/2 (1181) 48-1/4 (1226) 35-1/4 (895) 35-1/4 (895)
MPD-4035
MPD-4540 51-1/2 (1308) 53-1/4 (1353) 40-1/4 (1022) 40-1/4 (1022)
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).
HearthExtension-Ahearthextensionisnotrequiredwiththisappliance.
If a hearth extension 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 installation requirements.
Shelf Height - To provide for the lowest possible shelf surface, use the
alternate rear vent outlet, the venting attached to the top vent should be
routedin awaytominimizeobstructionstothespaceabovetheappliance.
Do not insulate the space between the appliance and the area above
it (see Figure 8). The minimum height from the base of the appliance 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 on
or near conventional construction materials. However, if installed on
combustible materials, such as carpeting, vinyl tile, etc., a metal or wood
barrier covering the entire bottom surface must be used.
MINIMUM CLEARANCES*Inches (millimeters)
Back 1/2 in. (13)
0 (0) from Spacers Or Dimples
Sides 1/2 in. (13)
0 (0) from Spacers Or Dimples **
Top Spacers 0 (0)
Floor 0 (0)
From Bottom of Unit To Ceiling 64 (1626)
Vent 3 (76) Top* / 1 (25.4) Sides & Bottom
SERVICE CLEARANCES Feet (meters)
Front 3 feet (0.9 meters)
Table 5
*Note: 3 in. (75 mm) above any horizontal/inclined vent component.
**Note: See Page 10, Step 1 for clearance requirements to the nailing
flange located at each side of the unit and any screw heads adjacent to it.
Figure 8 - Shelf Height Minimum Clearances With Top Venting
Shelf Above Fireplace With Rear Venting
Do not insulate the
space between the
appliance and the
area above it.
Shelf Height
(see table)
Shelf Height
(see table)
Do not insulate the
space between the
appliance and the
area above it.
Shelf Above Fireplace With Top Venting

9
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Figure 9 - Minimum Mantel Clearances Figure 10 - Minimum Distance to Side Wall
Combustible materials may project beyond one side of the fireplace
opening as long as they are kept within the shaded areas illustrated here.
12 (305) MANTEL
10 (254) MANTEL
8 (203) MANTEL
6 (152) MANTEL
4 (102) MANTEL
4
(102)
14
(356) 12
(305) 10
(254) 2 (51) MANTEL
TOP OF
APPLIANCE
6
(152)
NOTE - Hood shown as positioned in louvered
front model. The hood position in the flush
faced front model is lower than shown.
8
(203)
MANTEL CLEARANCES
Inches (mm)
17"
14"
Min. Distance To
Unprotected
Perpendicular Side Wall
8-1/4"
45°
Combustible Materials
Allowed In Shaded
Area “Safe Zone”
12"
5"
Top View Of
Fireplace
Side
Wall
Side
Wall
Min. Distance
To Protected
Perpendicular
Side Wall
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 combustible materials to be positioned in front of or overlapping the appliance face (see Figures 65 and 66 on Page 34 ).
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.
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.

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
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 fire-
box 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
Glass Panels on Page 32.
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).
Figure 12 - Nailing Flanges
Figure 11
Step 1. FRAMING
Frametheseappliances asillustratedinFigures
13 and 14 on Pages 10 and 11 (Figure 14
applies to corner framing installations only).
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.
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 60, page 32). 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 12)Route gas supply line to
appliance location.
Step 3. Preparing the appliance vent collar.
Step 4. (Page 13)Install the vent system and
exterior termination.
Step 5. (Page 25)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 26)Install blower kit (optional
equipment).
Step 7. (Page 26)Make connection to gas
supply.
Step8.(Page 27)Verifyingapplianceoperation.
Step 9. (Page 28)Install the logs, decorative
volcanic stone and glowing embers.
Step10. (Page 32) Install glassdoorassembly.
Step 11. (Page 32) Adjust burner to ensure
proper flame appearance.
Step 12. (Page 34) Install the hoods.
Step 13. (Page 35) 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 Glass Enclosure Panels on
Page 32).
2. Remove log set box from firebox. Next,
remove embers and volcanic stone from con-
trol compartment. Handle logs carefully to
prevent breakage.
REMOVE
CARDBOARD
BEFORE USING
Pressure Relief
Plates
Remove Cardboard Before
Using Appliance
REMOVE
CARDBOARD
BEFORE USING
TYPICAL INSTALLATION SEQUENCE
The typical sequence of installation is outlined
below. However,each installationis uniqueand
may result in variations to the steps described.
See the page numbers references in the follow-
ing steps for detailed procedures.

11
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
.oNledoM A B C D E
8233-TDPM .ni 4/133 4/133 ----- 4/373 8/721
mm 548 548 ----- 959 723
8233-RDPM .ni 4/133 4/133 8/591 ----- 8/721
mm 548 548 894 ----- 723
0353-DPM .ni 4/153 4/153 61/1112 4/393 61
mm 598 598 155 0101 604
5304-DPM .ni 4/104 4/104 61/1162 4/344 61
mm 2201 2201 876 7311 604
0454-DPM .ni 4/154 4/104 61/1162 4/344 61
mm 9411 2201 876 7311 604
A
BD
7
(178)
5-1/8 12-1/8
(308)
10-1/2
(267)
C
VENT FRAMING -
TOP VENT WITH ONE
90°ELBOW
VENT FRAMING -
REAR VENT WITH
NO ELBOWS
Framing should be
constructed of 2x4
or larger lumber.
Inches (mm)
E
(130)
(130)
7
(308)
(178)
E is the required framing depth dimension when the
finish material (drywall) thickness is 1/2 in. (13mm).
1/2 A
5-1/8 12-1/8
FIREPLACE AND FRAMING SPECIFICATIONS
Vent Size
Co-axial DV
Vent Size
4-1/2" Inner
7-1/2" Outer
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 open-
ing, 10-1/2" x 10-1/2" (267 mm x 267 mm) inside dimensions, about
this center mark (see Figure 18).
Notes
Diagrams, illustrations and photographs are not to scale – consult installa-
tion instructions. Product designs, materials, dimensions, specications,
colors and prices are subject to change or discontinuance without notice.
Efficiencies %
Natural Gas Propane
Models AFUE P4 AFUE P4
MPDT-3328 62 45 64 49
MPDR-3328 61 53 64 55
MPD-3530 62 53 60 55
MPD-4035 67 59 67 60
MPD-4540 67 59 67 59
Viewable Glass Size
33" Model 27-1/2" Wide
17" High
35" Model 29-1/2" Wide
18-7/8" High
40" Model 34-1/2" Wide
24" High
45" Model 39-1/2" Wide
24" High
Figure 13
Framing
.oNledoM A B C D E F** G H J K L M N
8233-TDPM
8233-RDPM
.ni 8/133 8/103 71 2/172 8/133 8/591 2/112 4/301 61/316 3 23/118 3/22 31
mm 148 567 234 996 148 894 645 372 371 67 212 07 033
0353-DPM .ni 8/153 8/123 91 2/192 8/153 61/1112 8/742 1 61/72 9 3 9 3 61
mm 298 618 384 947 298 155 236 613 022 67 022 67 604
5304-DPM .ni 8/104 8/173 42 2/143 8/104 61/1162 8/792 1 61/514 9 3 9 3 61
mm 9101 349 016 678 9101 876 957 973 022 67 022 67 604
0454-DPM .ni 8/104 8/173 42 2/193 8/154 61/1162 8/743 61/771 9 3 9 3 61
mm 6411 349 016 3001 6411 876 688 344 022 67 022 67 604
G
H
Top View
*CONCENTRIC FLUE
FLUE - 4-1/2 (114)
COMBUSTION AIR
- 7-1/2 (190)
FRAMING
SPACERS
(Top and Sides
and Rear)
* MPD models have a top and rear vent
(Louvered Front Model Shown)
MPDR models have only a rear vent
MPDT models have only a top vent
J
** Note 1 - Collars protrude one inch on
MPDT-3328 and MPDR-3328 models.
**See Note 1
F**
N
1/2 (13)
1-5/8
(42)
L
K
NOTE - Eyebrow
hood shown as positioned
in louvered front model.
GAS INLET
(Either Side
and bottom)
**Rear vent models only
ELECTRICAL
INLET
2-3/4 x 2 (70 x 51)
COVER PLATE with
KNOCKOUT)
Right Side View
M
* * See Note 1
6 (152)
1-3/8 (35)
OPTIONAL ELECTRICAL
INLET KNOCKOUT,
REQUIRING A FIELD
PROVIDED JUNCTION BOX
(Either Side)
E
B
D
C
Front View
3 (76)
A

12 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
.oNledoM A B C D E F
8233-TDPM
8233-RDPM
.ni 8/133 2/184 61/543 61/371 4/142 5
mm 148 2321 278 734 616 721
0353-DPM .ni 8/153 2/175 8/504 61/391 4/382 8/16
mm 298 1641 2301 784 037 651
5304-DPM .ni 8/104 61/316 23/1134 61/391 61/1103 8/77
mm 9101 4551 1011 784 977 002
0454-DPM .ni 8/154 8/366 61/5164 61/391 61/333 4/39
mm 6411 6861 2911 784 348 842
C
Back wall of chase/enclosure (including any finishing materials)
a
7” (178 mm)
b
Note-
Venting requirements for rear vent applications in corner installations -
- the horizontal vent length “a” to “b,” must not exceed 28 inches (711 mm)
MPDT-3328 AND MPDR-3328 Models -
Dimensions A to F occur when one 45 degree elbow is connected directly to the
appliance collar.
MPD-3530, MPD-4035 and MPD-4540 Models - Dimensions D and F occur when
one 45 degree elbow is connected directly to the appliance collar.
MPD and MPDR units
D
E
F
A
B
MPD and MPDT units
FIREPLACE FRAMING SPECIFICATIONS
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
Notes:
• All appliances are factory-equipped with
a flexible gas line connector and 1/2 inch
shutoff valve (see Figure 50 on Pagec 25).
• SeeMassachusettsRequirements on Page
4foradditionalrequirementsforinstallations
in the state of Massachusetts in the USA.
• ThegassupplylineshouldNotbeconnected
to the appliance until Step 6 (Page 25).
• Apipejointcompoundratedforgasshouldbe
usedonthethreadedjoints.Ensure propane
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. AppliancesusingPropane 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).
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.
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).
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 25).
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
and regulations. We recommend that a quali-
fied individual such as a plumber or gas fitter
be hired to correctly size and route the gas
supply line to the appliance. Installing a gas
supply line from the fuel supply to the appliance
involves numerous considerations of materials,
protection, sizing, locations, controls, pressure,
sediment, and more. Certainly no one unfamil-
iar and unqualified should attempt sizing or
installing gas piping.
Figure 14 - Corner Framing with Horizontal Termination
Also see Figure 13.
Figure 15 - Route Gas Line
3"
(76 mm)
Left Side Front
Corner of Fireplace
Framing
6-1/2"
(152 mm)
Pipe Coupling
(Recommended)

13
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Use only approved vent 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 ap-
pliance, install vent restrictor (provided) in the
appliance top flue outlet as shown in Figure 18
(MPDT-3328,MPD-3530,MPD-4035andMPD-
4540) or rear flue outlet as shown in Figure 19
(MPD-3530, MPD-4035 and MPD-4540). It is
held in place by friction, only.
Step 3. Preparing the Appliance Vent
Collar On MPD-3530/4035/4540 Series
(Combined Top And Rear Vent) Models
Each of the unit's two vent collars are sealed
with a cover plate and a seal plate and gasket.
The cover, and seal plate and gasket must be
removedfrom thevent collarbeing used.Refer
to Figure 16 for top vent usage and Figure 17
for rear, and the following steps to prepare the
appropriate collar for use.
From theventcollar beingused,remove the four
screws securing the vent seal plate and gasket.
Remove and discard the seal plate and gasket.
When the top vent collar is being used, from
inside the firebox, loosen the two screws in the
keyhole slots of the cover plate and remove the
remaining two cover plate securing screws.
Remove and discard the cover plate. Reinstall
and securely tighten all four screws.
When the rear vent collar is being used, from
inside the firebox, remove the two screws se-
curing the lintel to the rear wall of the firebox,
then remove the lintel. Remove the four cover
plate securing screws. Remove and discard
the cover plate.
Reinstall and securely tighten all four cover
plate screws. Re-secure the lintel to the rear
wall of the firebox.
Figure 18
VENT SEAL PLATE
GASKET
FIREBOX TOP
CABINET TOP SECURING
SCREWS
VENT
COVER PLATE
TOP VENT
ON MPD-3530/4035/4540 SERIES MODELS
(COMBINED TOP AND REAR VENT UNITS)
TOP VENT SEAL & COVER PLATE REMOVAL
WHEN USING THE TOP VENT
COVER PLATE
SECURING SCREWS
CROSS SECTION
(INSIDE UNIT)
(OUTSIDE UNIT)
VENT SEAL PLATE
GASKET
SECURING
SCREWS
CROSS SECTION
LINTEL
SECURING
SCREWS
LINTEL
REAR VENT
COVER PLATE
SECURING SCREWS
ON MPD-3530/4035/4540 SERIES MODELS
(COMBINED TOP AND REAR VENT UNITS)
REAR VENT SEAL & COVER PLATE REMOVAL
WHEN USING THE REAR VENT
CABINET BACK
(INSIDE UNIT) (OUTSIDE UNIT)
Figure 17
Figure 16
A vent restrictor may be needed when
vertically terminating the vent system above
the roof (when using the appliance top vent),
install vent restrictor in the top vent of the
fireplace outlet on MPD-3530/4035/4540
and MPDT-3328 series models.
RESTRICTOR
APPLIANCE TOP
VENT OUTLET
VENT RESTRICTOR INSTALLATION
(TOP VENT)
If needed, install the restrictor orientated as
shown, either from inside or outside the unit,
in the inner fireplace collar.
INNER
FIREPLACE
COLLAR
RESTRICTOR
APPLIANCE REAR
VENT OUTLET
A vent restrictor may be needed when
horzontally terminating the vent system from
the rear of the appliance (when using the
appliance rear vent), install vent restrictor in
the rear vent of the fireplace outlet on
MPD-3530/4035/4540 series models, in any
installation that has a vertical vent run in
excess of three feet (0.914 meters).
VENT RESTRICTOR INSTALLATION
(REAR VENT)
INNER FIREPLACE
COLLAR
If needed, install the restrictor orientated as
shown, either from inside or outside the unit,
in the inner fireplace collar.
Figure 19
Step 4. INSTALL THE VENT SYSTEM
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.
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.
Note: The restrictor is included within the
firebox.
Select Venting System - Horizontal or Vertical
Withtheappliancesecuredinframing,determine
vent routing and identify the exterior termina-
tion 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 34 and 35.
WARNING
Failure to reinstall and securely
tightencover plate screws could
resultinleakageofflueproducts
intothe living space. Ventcover
plate and vent seal cap must
remain securely in stalled 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.
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
O
T
A
L
Q
T
Y
noitceSteN )sehcni(htgneL 2/1-4 2/1-01 2/1-22 2/1-43 2/1-64
tneVfothgieH snoitceStneVforebmuN
sehcni tf
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
TRAHCHTGNELNOITCESTNEV
noitceSlanimoN )sehcni(htgneL 6 21 42 63 84 T
O
T
A
L
Q
T
Y
noitceSteN )sehcni(htgneL 2/1-4 2/1-01 2/1-22 2/1-43 2/1-64
tneVfothgieH snoitceStneVforebmuN
sehcni tf
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 20
VERTICAL TERMINATION SYSTEMS (ROOF)
See Figure 20 and Figures 30 through
32 on Page 17 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™pipemayalso beused. 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 20)
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
Pages 35 and 36 - 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.

15
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
10-1/2 Min.
(267 mm)
10-1/2 Min.
(267 mm)
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
1 inch
(25.4 mm)
minimum
clearance to
combustibles
Support Straps
(Plumber’s tape)
8 feet (2.4 m)
Maximum
Blocking
Figure 21
Figure 22
Figure 24
Figure 23
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 23.
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
abovetheceilinglevel,thefirestop/spacermust
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/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 table on
pages 35 and 36.
E. Support the vertical vent run sections -
Note-Properventingsupport is very important.
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
theframingmemberswithnailsorscrews.Loop
the tape around the vent, securing the ends of
the tape to the framing. If desired, sheet metal
screws#6x1/2"lengthmaybeusedtosecurethe
support straps to the vent pipe. See Figure 24.
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 14 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
Vent Section Length Chart on page 14 for an
aidinselectinglengthcombinations.Elbowsare
available in 90° and 45° configurations. Refer
to Figure 25 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
combustible materials forallverticalelements.
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 21 ).
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 22 ). 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
unitizeddesign oftheSecureVentcomponents
will engage and seal both the inner and outer
pipe without the need for sealant or screws.
If desired 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.
C.Attachventcomponentstoeachother-Other
vent sections may be added to the previously
installedsectioninaccordancewiththerequire-
ments of the vertical vent figures and tables.
To add another vent component to a length of
ventrun,alignthedimpledendovertheinclined
channel end of the previously installed section,
adjusting the radial alignment until the four
locking dimples are aligned with the inlets of
thefourinclinechannelsoftheprevioussection.
B. Attach vent components to appliance -
Secure Vent SV4.5 direct vent system compo-
nents are unitized concentric pipe components
featuring positive twist lock connections (see
Figure 19 ).
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.

16 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 26
Figure 27
Figure 29
Figure 28
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'(1.52m) alonghorizontal/inclined vent
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-
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.
H. Frame roof opening - Identify location for
vent at the roof. Cut and/or frame opening per
Roof Framing Chart and Figure 26.
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 25.
Figure 25
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 5. The SV4.5CGV-1
Vertical Termination (Figure 29 ) 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
thefourincline channelsofthelastvent section.
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 27 ). Nail along
perimeterto secureflashingoradjustroofingto
overlap the flashing edges at top and sides only
andtrimwherenecessary.Sealthetopand both
sides of the flashing with waterproof caulking.
J. Install the storm collar - Install the storm
collar, suppliedwith theflashing, overthevent/
flashingjoint.SeeFigure 28.Loosenthe storm
collar screw. Slide collar down until it meets
the top of the flashing. Tighten the adjusting
screw. Apply non-combustible caulking or
mastic around the circumference of the joint
to provide a water tight seal.

17
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Figure 31 - Rear Vent -
ONE 90 DEGREE ELBOW
Figure 30 - Top Vent - STRAIGHT
Figure 32 - Top Vent - TWO 90 DEGREE ELBOWS
VERTICAL VENT FIGURES/TABLES
Note: It is very important that the horizontal/
inclinedrunbemaintained in astraight (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 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/spacer must be used anytimevent
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 39 on page 21 ).
Note: Secure Vent (rigid vent pipe) is shown
in the figures; Secure Flex (flexible vent pipe)
may also be used.
A Vent Restrictor, as shown in Figure 18 on
Page 13, must be used in this application.
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.
TABLE A
H Maximum V Minimum
feet feet
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
(meters) (meters)
Example: If 20 feet of (H) horizon-
tal vent run is needed, then 4 feet
minimum of (V) vertical vent will
be required.
Thistableshowsa1(V)to5(H) ratio.
For every 1 foot of (V) vertical, 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 39.
TABLE B
H Maximum V Minimum
feet (meters) feet
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.
(meters)
WARNING
Under no circumstances, may separate sections of concentric flexible vent
pipe be joined together.
40 feet
(12.2 meters)
Maximum
* Ceiling
Firestop/Spacer
(SV4.5VF)
* When using
Secure Flex, use
Firestop/Spacer
SF4.5VF
V
H
*Ceiling
Firestop/Spacer
(SV4.5VF)
* When using Secure Flex,
use Firestop/Spacer
SF4.5VF
H
V
V1
*Ceiling
Firestop/Spacer
(SV4.5VF)
**Wall
Firestop/Spacer
(SV4.5HF)
**When using Secure
Flex, use Firestop/Spacer
SF4.5HF
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF

18 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
TABLE C
H+H1Maximum H Maximum V Minimum
feet feet feet
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.
(meters) (meters)
(meters)
Example: If 20 feet of (H) 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) horizontal run, up
to a maximum horizontal run of 20 feet.
TABLE D
H+H1Maximum V Minimum
feet feet
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.
(meters) (meters)
Example: If 20 feet of (H) 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) 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 39.
VERTICAL VENT FIGURES/TABLES
(continued)
Figure 33 - Rear Vent - THREE ELBOWS
Figure 34 - Top Vent - THREE ELBOWS
H1
V
V1
H
*Ceiling
Firestop/Spacer
(SV4.5VF)
**Wall
Firestop/Spacer
(SV4.5HF)
*Ceiling
Firestop/Spacer
(SV4.5VF)
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
**When using Secure
Flex, use Firestop/Spacer
SF4.5HF
V
H1
H
V1
*Ceiling
Firestop/Spacer
(SV4.5VF) **Wall
Firestop/Spacer
(SV4.5HF)
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
**When using Secure
Flex, use Firestop/Spacer
SF4.5HF

19
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Figure 35
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,(refertoFigure 22
onpage 15). Alloftheappliancescoveredin this
document are fitted with collars having locking
inclined channels. The dimpled end of the vent
componentsfit overtheappliancecollartocreate
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" (267mm),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
occurintheceilingorroof joists. Allowforelbows
as indicated in Figure 25 on page 16.
Maintain a minimum 1" (25 mm) clearance to
combustiblesontheverticalsections.Clearances
for the horizontal runs are; 3" (76 mm) on top, 1"
(25mm)on sides,and1" (25mm)atthe bottom.
B. Frame exterior wall opening -
Locate the center of the vent outlet on the ex-
terior wall according to the dimensions shown
in Figure 9 on page 8. 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 21 on page 15 ).
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 24 on page 15.
H. Changeventdirection- Attransitionfromor
toahorizontal/inclinedrun,installtheSV4.5E45
and SV4.5E90 elbows in the same manner as
the straight vent sections. The elbows feature
atwist sectionto allowthem tobe routedabout
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 25 on
page 16.
I. Continueinstallationof horizontal/inclined
sections - Continue with the installation of the
straightventsections inhorizontal/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 35,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 inaccordance withtherequire-
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-
ingdimplesarealigned with theinlets ofthefour
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
thechannels.This seating positionis indicated
by the alignment of the arrow and dimple as
shown in Figure 23 on page 15.
D. Attach vent components to appliance - To
attach a vent component to the appliance collar,
alignthedimpledendoverthecollar,adjustingthe
radialalignmentuntilthefourlockingdimplesare
aligned withtheinletsofthe fourinclinechannels
on the collar (refer to Figure 22 on page 15).
Bothofthese horizontalventsystemsterminate
through an outside wall. Building Codes limit
or prohibit terminating in specific areas. Refer
to Figure 8 on page 7 for location guidelines.
Figures 35, and Figures 39 to 44 on pages
21 to 23 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
fully engages,thentwistthecomponentclockwise,
running the dimples down and along the incline
channels 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
Vertical
Rise
SV4.5E90
Elbow
Horizontal / Inclined Run SV4.5HT-2
Termination
Firestop/Spacer
SV4.5L6/12/24/36/48
Vent Sections
Support Bracket Spacing
Every 5 ft (1.52 m)
See Figure 24 on page 15 for
vertical vent section support.
SV4.5HT-2
Termination
Support
Brackets
Building
Support
Framing
Ceiling
Fireplace
Exterior
Wall
Exterior
Wall
TYPICAL HORIZONTAL VENT INSTALLATION

20 NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
IMPORTANT: The vent termination is hot
while in operation and for a period of
time following the use of the fireplace.
To prevent contact with hot surfaces,
we recommend the use of a Termina-
tion Guard. See Page 36. This can be
purchased at your local dealer.
Figure 36
Figure 37
Installing the Square Horizontal Termination (SV4.5HT-2)
M. Install the desired termination -
1.Install the squaretermination(SV4.5HT-2
or SV4.5HTSS)- For the last step , from out-
side the exterior wall, slide the collars of the
termination onto the adapter (the outer over
the outer and the inner inside the inner) until
the termination seats against the exterior wall
surface to which it will be attached. Orient
the housing of the termination with the arrow
pointed upwards. Secure the termination to
the exterior wall. The horizontal termination
must not be recessed into the exterior wall
or siding by more than the 1-1/4" (32 mm) as
shown in Figure 37.
SVHRK Snorkel Cap –The snorkel cap is
designed to be fitted into a basement window
box. The SVHRK cap is for use with flex vent
Theverticaldistancebetweentheinletandoutlet
of the cap is 28 in. (711 mm). pipe.
K. Attach termination adapter - Attach the
adapter(adapter-SV4.5RCH-providedwiththe
termination) to the vent section or telescoping
ventsection),elboworappliancecollarasshown
in Figure 36 in the same manner as any SV4.5
vent component (refer to Step E).
J. Assemble vent run to exterior wall - If not
previously measured, locate the center of the
vent at the exterior wall. Prepare an opening as
described in Step B. Assemble the vent system
to point where the terminus of the last section
is within 7 in. (178 mm) to 11-1/4 in. (286
mm) inboard of the exterior surface to which
the SV4.5 HT termination is to be attached, see
Figure 37. If the terminus of the last section
is not within this distance, use the telescopic
vent section SV4.5LA, as the last vent section.
For wall thicknesses greater than that shown in
Figure37,refertoTable8onpage21.Thistable
liststhe additionalventing componentsneeded
(in addition to the termination and adapter) for
a particular range of wall thicknesses.
L. Install Firestop/Spacer at exterior wall
-When using the square termination, install
SV4.5HF (Secure Vent), SF4.5HF (Secure Flex)
Firestop/Spaceroverthe openingattheexterior
sideoftheframing,longsideup, withthe 3inch
spacer clearance at the top as shown in Figure
36, and nail into place.
(The Firestop/Spacer may also be installed over
the opening at the interior side of the framing.)
Siding
Stucco
1-1/4" Maximum Recess of
the Square Termination into
Exterior Finishing Material
Exterior Surface of
Framing
6 in. to 9-1/4 in.
(152 to 235 mm)**
Exterior Surface of Siding
Interior Surface of
Finished Wall
Maximum wall thickness
10 in.(254 mm)**
SV4.5HT-2
Square Termination
Maximum Extent of
Vent Run Sections
Relative to Exterior
Surface of Framing
Last Vent Section. Use
Telescopic Vent
Section (SV4.5LA), If
Necessary
Adapter
SV4.5RCH
SV4.5HT-2
Square Termination
Venting Connection and Exterior Wall Recessing of the
Horizontal Square Termination (SV4.5HT-2).
*Use silicone caulking to seal
the top and sides of the
termination, up to the
underlayment, stucco, or
masonry wall surface.
**For thicknesses greater
than 10 inches, see Table 8.
*Caulk
*Caulk
Firestop/Spacer (SV4.5HF) shown
on the exterior side of the wall. It
may also be installed on the
interior side. SV4.5HT-2
Termination
10-1/2"
(267mm)
7"
(178)
5-1/8"
(130 mm)
12-1/8"
(308 mm)
Note: Centerline of Vent Piping is
NOT the Same as the Centerline of
the Framed Opening.
6 to 48 inch Vent Section,
Telescopic vent section,
Elbow or Appliance Collar
See Figure 13 on page 11
for Min. Distance to Base
of Appliance.
Base of Appliance
3"
(76 mm)
1"
(25.4 mm)
Adapter
SV4.5RCH
Horizontal terminations have been designed to perform in a wide range of weather
conditions. Our terminations meet or exceed industry standards.
When selecting the locations of your horizontal terminations, do not place the termination
where water from eaves and adjoining rooflines may create a heavy flow of cascading water
onto the termination cap. If the cap must be placed where the possibility of cascading water
exists, it is the responsibility of the builder to direct the water away from the termination
cap by using gutters or other means.
Take care to carefully follow the installation instructions for the termination, including the
use of silicone caulking where required.