Lennox Hearth Products Direct Vent MPD-33 Series User manual

1
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
INSTALLATION
INSTRUCTIONS
VENTED GAS FIREPLACE HEATERS - DIRECT VENT MODELS
P/N 850,014M REV. R 06/2008
MODELS
POURVOTRESÉCURITÉ: Nepasentreposerniutiliser
d'essencenid'autrevapeursouliquidesinflammables
dans le voisinage de cet appareil ou de tout autre
appareil.
POURVOTRESÉCURITÉ: Quefairesivoussentezune
odeur de gaz:
• Ne pas tenter d'allumer d'appareil.
• Netouchezàaucuninterrupteur. Nepasvousservir
des téléphones se trouvant dans le batiment où
vous vous trouvez.
• Evacuez la piéce, le bâtiment ou la zone.
• Appelez immédiatement votre fournisseur de gaz
depuis un voisin. Suivez les instructions du
fournisseur.
• Si vous ne pouvez rejoindre le fournisseur de gaz,
appelez le service dos incendies.
L'installationetservicedoitêtreexécutéparunqualifié
installeur,agencedeserviceoulefournisseurdegaz.
DIRECT VENT
MPD-33/35/40/45 SERIES
FORYOURSAFETY: Donotstoreorusegasoline
orotherflammablevaporsorliquidsinthevicin-
ity of this or any other appliance.
FORYOURSAFETY: Whatto do if you smellgas:
• DO NOT light any appliance.
• DO NOT touch any electrical switches.
• DO NOT use any phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow your gas suppliers
instructions.
• Ifyourgassuppliercannotbereached,callthe
fire department.
Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
OTL Report No. 116-F-13-4
A French manual is available upon request. Order Form Number
850,014CF.
Ce manuel d’installation est disponible en francais, simplement
en faire la demande. Numéro de la pièce 850,014CF.
sledoMtlovilliMsledoMcinortcelE
MNC8233-TDPMMNC5304-DPMENC8233-TDPMENC5304-DPM
MPC8233-TDPMB-MNC5304-DPMEPC8233-TDPMEPC5304-DPM
MNC8233-RDPMMPC5304-DPMENC8233-RDPMB-ENC5304-DPM
MPC8233-RDPMMNC0454-DPMEPC8233-RDPMENC0454-DPM
MNC0353-DPMB-MNC0454-DPMENC0353-DPMEPC0454-DPM
B-MNC0353-DPMMPC0454-DPMEPC0353-DPMB-ENC0454DPM
MPC0353-DPMB-ENC0353-DPM
WARNING:IFTHEINFORMATIONINTHISMANUAL
IS NOT FOLLOWED EXACTLY, A FIRE OR EXPLO-
SION MAY RESULT CAUSING PROPERTY DAM-
AGE, PERSONAL INJURY OR LOSS OF LIFE. AVERTISSEMENT: ASSUREZ-VOUS DE BIEN SUIVRE
LESINSTRUCTIONSDONNÉDANSCETTENOTICEPOUR
RÉDUIRE AU MINIMUM LE RISQUE D'INCENDIE OU
POUR ÉVITER TOUT DOMMAGE MATÉRIEL, TOUTE
BLESSURE OU LA MORT.
This appliance may be installed in an aftermarket perma-
nently 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.
In the Commonwealth of Massachusetts:
• Installation must be performed by a licensed plumber or
gas fitter.
See Table of Contents for location of additional
Commonwealth of Massachusetts requirements.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
US

2NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 1
Electronic appliances are designed to operate
on natural or propane gas. An electronic inter-
mittent pilot ignition system provides safe,
efficient operation. External electrical power is
required to operate these units.
TheseappliancescomplywithNationalSafety
Standards and are tested and listed by Omni-
Test Laboratories (Report No. 116-F-13-4) to
ANSIZ21.88(inCanada,CSA-2.33),andCAN/
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 mobile homes.
Installationmustconformtolocalcodes.Inthe
absenceof local codes,installation must com-
ply with the current National Fuel Gas Code,
ANSI Z223.1. (In Canada, the current CAN-1
B149 installation code.)
TABLE OF CONTENTS
Packaging........................................ page 2
Introduction..................................... page 2
General Information......................... page 2
Location .......................................... page 4
Appliance and Vent Clearances....... page 4
Vent Termination Clearances ........... page 5
Typical Installation Sequence .......... page 5
Detailed Installation Steps ............... page 6
Step 1. Framing ............................. page 6
Step 2. Routing Gas Line ............... page 6
Fireplace Specifications ................... page 9
Step 3. Install the Venting System. page 9
Requirements for Commonwealth
of Massachusetts .......................... page 9
Vertical Termination Systems .......... page 11
Vent Section Length Chart............... page 11
Vertical Vent Tables and Figures...... page 11
Horizontal Termination System........ page 16
Horizontal Vent Tables and Figures . page 18
Venting Using Flexible Vent Pipe ..... page 21
Step 4. Field Wiring ....................... page 22
Step 5. Optional Blower Kit Wiring page 22
Step 6. Connecting Gas Line.......... page 23
Step 7. Installing Logs................... page 24
Step 8. Checking Unit Operation ..... page 24
Step 9. Installing Glass Door ......... page 24
Step 10. Burner Adjustments........... page 25
Step 11. Hood Installation ............... page 25
Finishing Requirements................... page 25
Cold Climate Insulation.................... page 26
Installation Accessories................... page 27
Gas Conversion Kits.................. page 29
TYPICAL INSTALLATION
DO NOT ATTEMPT TO ALTER OR MODIFY
THECONSTRUCTIONOF THE APPLIANCEOR
ITS COMPONENTS. ANY MODIFICATION OR
ALTERATION MAY VOID THE WARRANTY,
CERTIFICATIONANDLISTINGSOFTHISUNIT.
INTRODUCTION
Thesefireplacesare designed, tested andlisted
foroperationandinstallationwith,andonlywith,
SecureVent™DirectVentSystemComponents,
SecureFlex™FlexibleVentComponentsmanu-
facturedbySecurityChimneysInternationaland
Z-Flex™ Model GA Venting Systems, listed to
UL1777 and ULCS635 manufactured by Flex-
master Canada Limited. These approved vent
system components are labeled for identifica-
tion. DONOTuseanyothermanufacturer'svent
components with these appliances.
Millivolt appliancesaredesignedtooperateon
natural or propane gas. A millivolt gas control
valvewith piezoignitionsystemprovidessafe,
efficient operation. External electrical power is
required to operate the optional blower if in-
stalled in these units.
GENERAL INFORMATION
Note: Installation and repair should be per-
formedbyaqualifiedserviceperson.Theappli-
ance should be inspected annually by a quali-
fied professional service technician. More fre-
quent inspections and cleanings may be re-
quired due to excessive lint from carpeting,
bedding material, etc. It is imperative that the
control compartment, burners and circulating
airpassagewaysoftheappliancebekeptclean.
S'assurerquelebrùleuretlecompartimentdes
commandes sont propres. Voir les instruc-
tions d'installation et d'utilisation qui
accompagnent l'appareil.
Provide adequate clearances around air open-
ings and adequate accessibility clearance for
service and proper operation. Never obstruct
the front openings of the appliance.
Theseappliancesare designed tooperateon
natural or propane gas only.
Millivolt Models -
Millivolt models come standard with the manu-
ally-modulatedgasvalve;flameappearanceand
heat output can be controlled at the gas valve.
Please read and understand these
instructions before beginning your
installation.
This installation manual will help you obtain a
safe, efficient, dependable installation for your
appliance and vent system.
PACKAGING
The assembled vented gas fireplace heater is
packaged with:
1 - one log set located in firebox area.
2 - one envelope containing the literature
package which consists of the homeowner's
manual,installationinstructions,logsetsupple-
ment and warranty; envelope is located in the
control area.
3-oneventrestrictortobeappliedasshownon
page 10; restrictor is taped to the envelope.
4 - one hood located behind the top panel.
5- onebagofdecorativevolcanicstonelocated
in the control area.
6 - one bag of glowing embers located in the
control area.
7-onebagofvermiculitelocatedincontrolarea.
ElectricalwiringmustcomplywiththeNational
ElectricalCodeANSI/NFPA70-(latestedition).
(In Canada, the current CSA C22-1 Canadian
Electrical Code.)
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.

3
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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0454-DPM63#25#
Table 1
Test gage connections are provided on the
front of the millivolt gas control valve (identi-
fied IN for the inlet and OUT for the manifold
side). A 1/8" NPT test gage connection is
provided at the inlet and outlet side of
the electronic gas control valve.
Minimuminletgaspressuretotheseappliances
is5.0 incheswatercolumn(1.24kPa)fornatural
gas and 11 inches water column (2.74 kPa) for
propane for the purpose of input adjustment.
Maximum inlet gas supply pressure to these
appliances is 10.5 inches water column (2.61
kPa) for natural gas and 13.0 inches water
column (3.23 kPa) for propane.
Donotusetheseappliancesifanyparthasbeen
under water. Immediately call a qualified,
professional service technician to inspect the
appliance and to replace any parts of the con-
trol system and any gas control which have
been under water.
Themillivoltappliancesaremanuallycontrolled
andfeatureasparkignitor(piezo)thatallowsthe
appliance's pilot gas to be lit without the use of
matches or batteries. This system provides
continuedserviceintheeventofapoweroutage.
These appliances must be isolated from the gas
supplypipingsystem (by closingtheir individual
manual shut-off valve) during any pressure test-
ing of the gas supply piping system at test pres-
sures equal to or less than 1/2 psig (3.5 kPa).
Theseappliancesandtheirindividualshut-offvalves
mustbe disconnectedfrom thegassupply piping
systemduringanypressuretestingofthatsystem
at pressures in excess of 1/2 psig (3.5 kPa).
Theseappliances must notbe connected toa
chimney or flue serving a separate solid fuel
burning appliance.
These heater rated appliances are intended
for use as supplemental heaters only.
Carbon Monoxide Poisoning: Early signs of
carbon monoxide poisoning are similar to
the flu with headaches, dizziness and/or
nausea.Ifyouhavethesesigns,obtainfresh
air immediately. Turn off the gas supply to
the appliance and have it serviced by a
qualified professional, as it may not be op-
erating correctly.
Installations at Altitudes of 0 to 4500 ft.-
Unitsaretestedandapprovedforelevations
of 0 to 4500 feet (0 to 1372 meters).
Installations at Altitudes above 4500 ft.-
For elevations above 4500 feet (1372
meters), install the unit according to the
regulations of the local authorities having
jurisdictionand,intheUSA,thelatestedition
oftheNationalFuelGasCode(ANSIZ223.1)
or, in Canada, the latest edition of the
CAN1-B149.1and.2codes.
Electronic Models -
Electronic models have a fixed rate gas valve.
Input of electronic models is shown in the
following table:
All Models -
Maximum manifold pressure is 3.5 in. w.c.
(0.87 kPa) for natural gas and 10 in. w.c.
(2.49 kPa) for LP/Propane gas.
Table1 showstheunits'gasorificesizefor
theelevationsindicated.
This appliance may be installed in an after-
market permanently located, manufactured
home (USA only) or mobile home, where
not prohibited by local codes. This appli-
ance is only for use with the type of gas
indicated on the rating plate. This appli-
ance is not convertible for use with other
gases, unless a certified kit is used.
Cet appareil peut être installé dans un maison
préfabriquée(É.-U.seulement)oumobile déjà
installéeàdemeuresilesréglementslocauxle
permettent.
Cet appareil doit être utilisé uniquement avec
les types de gaz indiqués sur la plaque
signalétique. Nepasl'utiliseravecd'autresgaz
saufsiunkitdeconversioncertifiéestinstallé.
Ne pas se servir de cet appareil s'il a étéplongé
dansl'eau,complètementou enpartie. Appeler
untechnicienqualifiépourinspecterl'appareilet
remplacertoutepartiedusystèmedecontrôleet
toutecommandequiontétéplongésdansl'eau.
Input of millivolt models is shown in the
following table:
WARNING: FAILURE TO COMPLY WITH
THEINSTALLATIONANDOPERATINGIN-
STRUCTIONSPROVIDEDINTHISDOCU-
MENT WILL RESULT IN AN IMPROP-
ERLY INSTALLED AND OPERATING AP-
PLIANCE, VOIDING ITS WARRANTY.
ANYCHANGETOTHISAPPLIANCEAND/
ORITS OPERATING CONTROLSISDAN-
GEROUS. IMPROPER INSTALLATION
ORUSEOFTHISAPPLIANCECANCAUSE
SERIOUSINJURYORDEATHFROMFIRE,
BURNS,EXPLOSIONORCARBON MON-
OXIDE POISONING.
WARNING: CHILDREN AND ADULTS
SHOULD BE ALERTED TO THE HAZARDS
OFHIGHSURFACETEMPERATURES.USE
CAUTION AROUND THE APPLIANCE TO
AVOID BURNS OR CLOTHING IGNITION.
YOUNG CHILDREN SHOULD BE CARE-
FULLYSUPERVISEDWHENTHEYAREIN
THE SAME ROOM AS THE APPLIANCE.
WARNING: DO NOT PLACE CLOTHING
OR OTHER FLAMMABLE MATERIALS
ON OR NEAR THIS APPLIANCE.
AVERTISSEMENT: SURVEILLER LES
ENFANTS. GARDER LES VÊTEMENTS,
LESMEUBLES,L'ESSENCEOUAUTRES
LIQUIDES À VAPEUR INFLAMMABLES
À COTE DE L'APPAREIL.

4NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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
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0353-DPM 2/164)1811(4/184)6221(34/15)598(34/15)598(
5304-DPM 0454-DPM 2/115)8031(4/135)3531(4/104)2201(4/104)2201(
KCAB )mm31(.ni2/1 srecaps)mm0(.ni0
SEDIS **)mm31(.ni2/1 srecaps)mm0(.ni0
SRECAPSPOT)mm0(.ni0
ROOLF)mm0(.ni0
mottoBmorF ottinUfo gnilieC )mm6261(.ni46
TNEV*)mm4.52(.ni1
SECNARAELCECIVRES
TNORF)sretem9.0(.teeF3
(Rear Vent Application
HORIZONTAL VENT
without a chase)
HORIZONTAL VENT
(Rear Vent Application
With a chase)
HORIZONTAL VENT
(Top Vent
Application)
VERTICAL VENT
(Top Vent
Application)
(Rear Vent
VERTICAL VENT
Application)
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
Figure 2
Figure 3
*Note: 3in.(75mm)aboveanyhorizontal/
inclined vent component.
**Note: See page 5, step 1 for clearance
requirements to the nailing flange located
at each side of the unit and any screw
heads adjacent to it.
Table 2
APPLIANCE AND VENT CLEARANCES
The appliance is approved with zero clearance
to combustible materials on all sides (as de-
tailedin Table2) ,withthefollowingexception:
When the unit is installed with one side flush
withawall,thewallontheothersideoftheunit
must not extend beyond the front edge of the
unit.Inaddition,whenthe unitisrecessed, the
sidewallssurroundingtheunitmustnotextend
beyondthefrontedgeoftheunit.See
Figure2 .
Typical Locations
The appliance should be mounted on a fully
supported base extending the full width and
depthoftheunit.Theappliancemaybelocated
on or near conventional construction materi-
als.However,ifinstalledoncombustiblemate-
rials, such as carpeting, vinyl tile, etc., a metal
or wood barrier covering the entire bottom
surface must be used.
LOCATION
In selecting the location, the aesthetic and
functional use of the appliance are primary
concerns.However,ventsystemroutingtothe
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.
Consideration should be given to traffic ways,
furniture, draperies, etc., due to elevated sur-
face temperatures (
Figure 2 ). The location
should also be free of electrical, plumbing or
other heating/air conditioning ducting.
Thesedirectventappliancesareuniquelysuited
for installations requiring a utility shelf posi-
tioneddirectlyabovethefireplace.Utilityshelves
likethesearecommonlyused forlocatingtele-
vision sets and decorative plants.
Toprovideforthelowestpossibleshelfsurface
use the alternate rear vent outlet with attached
venting routed in a way to minimize obstruc-
tions to the use of the space above the appli-
ance. Do not insulate the space between the
applianceandtheareaaboveit.See
Figure3 .
Theminimumheightfrom thebaseoftheappli-
ance to the underside of combustible materials
usedto constructa utilityshelf inthisfashionis
shown in the table in
Figure 3 .

5
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
hctiPfooR H)teef(
21/6ottalF0.1
21/7ot21/6revO52.1
21/8ot21/7revO5.1
21/9ot21/8revO0.2
21/01ot21/9revO5.2
21/11ot21/01revO52.3
21/21ot21/11revO0.4
Figure 4
Figure 5 - Side Elevation View
3"
(76 mm)
12"
(305 mm)
Termination Kit
Combustible Projection
greater than inches in length
Combustible Projection
2-1/2inches or less in length
18"
(457 mm)
Ventilated
Soffit Unventilated
Soffit
Horizontal Vent Termination Clearances
2-1/2
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
minimumof 3" (76mm) clearance toany over-
headcombustibleprojectionof2-1/2"(64mm)
or less. See Figure 5. For projections exceed-
ing2-1/2" (64mm),see Figure5 . Allhorizontal
terminations may be located as close as 6"
(152mm) to any (non-combustible and com-
bustible) exterior sidewall. This distance may
be decreased to 2" (51mm) for non-combus-
tible exterior sidewalls only, if the SV4.5HT-2
terminationisused. Foradditionalventlocation
restrictions refer to Figure 8 on page 7 .
Terminate multiple vent terminations accord-
ing to the installation codes listed on this
page.
Vertical Vent Termination Clearances
VENT TERMINATION CLEARANCES
Theseinstructionsshouldbeusedasaguide-
lineand do notsupersedelocal codes inany
way. Install vent according to local codes,
theseinstructions,the current NationalFuel
Gas Code (ANSI-Z223.1) in the USA or the
current standards of CAN/CGA-B149.1 and -
B149.2 in Canada.
Terminatesingle ventcapsrelativetobuilding
components according to Figure 4 .
Step 3. (page 9) Installtheventsystemand
exterior termination.
Step 4. (page 22) Field Wiring
a. Millivolt Appliances –Install the operating
control switch (not factory provided) and
bringinelectricalservicelineforforcedair
circulating blower (optional equipment).
b. Electronic Appliances –Field wire and
install operating control switch.
Step 5. (page 22) Install blower kit (optional
equipment).
Step 6. (page 23) Make connection to gas
supply.
Step 7. (page 24) Install the logs, decora-
tive volcanic stone and glowing embers.
Step 8. (page 24) Checkout appliance op-
eration.
Step 9. (page 24) Install glass door frame
assembly.
Step 10. (page 25) Adjust burner to ensure
proper flame appearance.
Step 11. (page 25) Install the hoods.
TYPICAL INSTALLATION SEQUENCE
The typical sequence of installation follows,
however,eachinstallationisuniqueresultingin
variations to those described.
Seethepagenumbersreferencesinthefollow-
ing steps for detailed procedures.
Step 1. (page 6) Construct the appliance
framing. Position the appliance within the
framing and secure with nailing brackets.
Step 2. (page 6) Route gas supply line to
appliance location.
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

6NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 7
Right Side
Front Corner of
Fireplace Framing
6-1/2"
(152 mm)
3"
(76 mm)
Step 1. FRAMING
Frametheseappliances asillustratedin Figure
9 on page 8, unless the appliance is to be
installed in a corner . See Figure 10 on page 8
for corner framing installations. All framing
details must allow for a minimum clearance to
combustible framing members as shown in
Table 2 .
Step 2. ROUTING GAS LINE
Routea1/2"(13mm)gaslinealongtheinside
oftherightsideframingasshownin
Figure7 .
Gas lines must be routed, constructed and
madeofmaterialsthatareinstrictaccordance
with local codes and regulations. All appli-
ancesare factory-equipped witha flexiblegas
lineconnectorand1/2inchshutoffvalve.(See
step 6 on page 23).
DETAILED INSTALLATION STEPS
The appliance is shipped with all gas controls
and components installed and pre-wired. Re-
move the shipping carton, exposing the front
glass door. Remove the top panel. Remove
thecardboard from underneaththe pressure
reliefplates. Pressinsimultaneously theleft
and right side of the bottom hinged panel, to
release it. Lower the bottom hinged panel.
Open the two latches (located under the fire-
box floor) securing the glass door. Remove
thedoorbytiltingitoutwardatthebottomand
lifting it up. Set the door aside protecting it
from inadvertent damage. See Figure 53 on
page 24.
Thefireplaceshouldbesecuredtothesidefram-
ingmembersusingtheunit'snailingflanges-one
topandbottomoneachsideofthefireplacefront.
See
Figure 6. Use 8d nails or their equivalent.
Iftheapplianceistobeelevatedabovefloorlevel,
asolidcontinuousplatformmustbeconstructed.
Headers may be in direct contact with the
appliance top spacers but must not be sup-
portedby themor notchedto fitaround them.
All construction above the appliance must be
selfsupporting.DO NOTuse theappliancefor
structural support.
Figure 6
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

7
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Figure 8
EXTERIOR HORIZONTAL VENT TERMINATION CLEARANCE REQUIREMENTS
V
VV
VV
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 Center Line
of Termination
18”
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.
*noitallatsnInaidanaC**noitallatsnISU
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8NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
.oNledoMABCDEF
8233-TDPM 8233-RDPM .ni8/1332/18461/54361/3714/1425
mm1482321278734616721
0353-DPM .ni8/1532/1758/50461/3914/3828/16
mm29816412301784037651
5304-DPM .ni8/10461/31623/113461/39161/11038/77
mm910145511011784977002
0454-DPM .ni8/1548/36661/516461/39161/3334/39
mm641168612911784348842
C
Back wall of chase/enclosure
(including any finishing materials)
a
7 (178)
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)
Inches
(millimeters)
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
.oNledoMABCDE
8233-TDPM .ni4/1334/133-----4/3738/721
mm548548-----959723
8233-RDPM .ni4/1334/1338/591-----8/721
mm548548894-----723
0353-DPM .ni4/1534/15361/11124/39361
mm5985981550101604
5304-DPM .ni4/1044/10461/11624/34461
mm220122018767311604
0454-DPM .ni4/1544/10461/11624/34461
mm941122018767311604
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
FRAMING WITH SQUARE HORIZONTAL TERMINATION (SV4.5HT-2)
5-1/8 12-1/8
Figure 9
Figure 10
Framing Dimensions
FIREPLACE FRAMING SPECIFICATIONS
Corner Framing with Square Termination (SV4.5HT-2)

9
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
G
E
B
D
C
F**
H
N
1/2 (13)
1-5/8
(42)
L
K
Top View NOTE - Eyebrow
hood shown as positioned
in louvered front model.
*CONCENTRIC FLUE
FLUE - 4-1/2 (114)
COMBUSTION AIR - 7-1/2 (190)
FRAMING
SPACERS
(Top and Sides
and Rear)
GAS INLET
(Either Side
and bottom)
* MPD models have a top and rear vent
Front View
3 (76)
(Louvered Front Model Shown)
**Rear vent models only
ELECTRICAL
INLET
2-3/4 x 2 (70 x 51)
COVER PLATE with
KNOCKOUT)
Right Side View
MPDR models have only a rear vent
MPDT models have only a top vent
J
M
* *Note 1 - Collars protrude one inch on MPDT-3328 and MPDR-3328 models.
* *See Note 1
* * See Note 1
6 (152)
1-3/8 (35)
OPTIONAL ELECTRICAL
INLET KNOCKOUT,
REQUIRING A FIELD
PROVIDED JUNCTION BOX
(Either Side)
A
.oNledoMABCDEF**GHJKLMN
8233-TDPM 8233-RDPM .ni8/1338/103712/1728/1338/5912/1124/30161/316323/1183/2231
mm1485672349961488946453723716721207033
0353-DPM .ni8/1538/123912/1928/15361/11128/742161/72939361
mm2986183849472981552366130226702267604
5304-DPM .ni8/1048/173422/1438/10461/11628/792161/514939361
mm910134901667891018769579730226702267604
0454-DPM .ni8/1048/173422/1938/15461/11628/74361/771939361
mm6411349016300164118766883440226702267604
Step 3. INSTALL THE VENT SYSTEM
General Information
Theseinstructionsshouldbeusedasaguide-
lineand do notsupersedelocal codes inany
way. Install vent according to local codes,
theseinstructions,the current NationalFuel
Gas Code (ANSI-Z223.1) in the USA or the
current standards of CAN/CGA-B149.1 and -
B149.2 in Canada.
Thesefireplacesaredesigned,testedand
listed for operation and installation with,
andonlywith, Secure Vent™DirectVent
SystemComponents, Secure Flex™Flex-
ible Vent Components manufactured by
Security Chimneys International and Z-
FLEX™Model GA Venting Systems listed
toUL1777andULCS635manufacturedby
Flexmaster Canada Limited.
These approved vent system components
arelabeledforidentification. DONOTuse
anyothermanufacturer'sventcomponents
with these appliances. These fireplaces
must be vented directly to the outside.
Massachusetts And New York City, NY
Requirements
Theseappliancesareapprovedforinstallation
in the following USA locations listed in the
following:
Massachusetts:
These fireplaces are approved for installation
intheUSstateofMassachusettsifthefollow-
ing additional requirements are met-
•Installation and repair must be done by a
plumberorgasfitterlicensedintheCommon-
wealth of Massachusetts.
•Theflexiblegaslineconnectorusedshallnot
exceed 36 inches (92 centimeters) in length.
•The individual manual shut-off must be a T-
handle type valve.
Figure 11
FIREPLACE SPECIFICATIONS

10 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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)
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 12
Figure 14
Figure 15
Figure 13
Select Venting System - Horizontal or Vertical
With the appliance secured in framing, deter-
mine vent routing and identify the exterior
termination location. The following sections
describe vertical (roof) and horizontal (exte-
rior wall) vent applications. Refer to the sec-
tion relating to your installation. A list of
approved venting components is shown in
thetwotableson page27andthetwotables
on page 28.
Installation of Vent Restrictor
Aventrestrictormaybeneededwiththisappli-
ance, install vent restrictor (provided) in the
appliancetopflueoutletasshownin
Figure14
(MPDT-3328,MPD-3530,MPD-4035andMPD-
4540) orrear flueoutletas shownin Figure 15
(MPD-3530, MPD-4035 and MPD-4540) . It is
held in place by friction, only.
WARNING: FAILURE TO REINSTALL AND
SECURELY TIGHTEN COVER PLATE
SCREWSCOULD RESULT INLEAKAGEOF
FLUEPRODUCTSINTOTHELIVINGSPACE.
VENTCOVERPLATEANDVENTSEALPLATE
MUSTREMAINSECURELYINSTALLEDON
UNUSED VENT COLLAR. FAILURE TO DO
SO COULD RESULT IN LEAKAGE OF FLUE
PRODUCTS INTO LIVING SPACE.
MassachusettsHorizontalVentRequirements
Inthe Commonwealth ofMassachusetts,hori-
zontal terminations installed less than seven
(7) feet above the finished grade must comply
with the following additional requirements:
•Ahardwired carbonmonoxidedetector with
analarmandbatteryback-upmustbeinstalled
on the floor level where the gas fireplace is
installed. Thecarbonmonoxidedetectormust
comply with NFPA 720, be ANSI/UL 2034
listed and be ISA certified.
•Ametalorplasticidentificationplatemustbe
permanently mounted to the exterior of the
building at a minimum height of eight (8) feet
above grade and be directly in line with the
horizontaltermination. Thesignmustread,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, NY:
These fireplaces are approved for installation
in New York City in the US state of New York.
The vent system may not service multiple
appliances,and must neverbe connected toa
flueservingasolidfuelburningappliance.The
vent pipe is tested to be run inside an enclos-
ingwall(suchasachase).Thereisnorequire-
mentforinspectionopeningsin theenclosing
wall at any of the joints in the vent pipe.
Preparing the Appliance Vent Collar on
MPD-3530/4035/4540Series (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
removed from the vent collar being used.
Refer to
Figure 12 for top vent usage and
Figure 13 for rear, and the following steps to
prepare the appropriate collar for use.
Fromtheventcollarbeingused,removethefour
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
insidethefirebox,loosenthetwoscrewsinthe
keyholeslotsofthecoverplateandremovethe
remaining two cover plate securing screws.
Removeanddiscardthecoverplate. Reinstall
and securely tighten all four screws.
Whentherearventcollarisbeingused,from
inside the firebox, remove the two screws
securing the lintel to the rear wall of the fire-
box, 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.