INSTALLATION
INSTRUCTIONS
DIRECT VENT
MERIT™ PLUS SERIES
VENTED GAS FIREPLACE HEATERS - DIRECT VENT MODELS
P/N 850,043M REV. E 06/2008
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.
MODELS
Millivolt Models
Electronic Models
MPLDV-30NM
MPLDV-30PM
MPLDV-35NM-2
MPLDV-35PM-2
MPLDV-40NM
MPLDV-40PM
MPLDV-45NM
MPLDV-45PM
MPLDV-30NE
MPLDV-35NE-2
MPLDV-40NE
MPLDV-45NE
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.
WARNING: IF THE INFORMATION IN THIS MANUAL
ISNOTFOLLOWEDEXACTLY,AFIREOREXPLOSION
MAY RESULT CAUSING PROPERTY DAMAGE, PER-
SONAL INJURY OR LOSS OF LIFE.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
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.
FOR YOUR SAFETY: Do not store or use gasoline
or other flammable vapors or liquids in the vicin-
ity of this or any other appliance.
FOR YOUR SAFETY: What to do if you smell gas:
POURVOTRESÉCURITÉ: Nepasentreposerni utiliser
d'essenceni d'autrevapeursouliquidesinflammables
dans le voisinage de cet appareil ou de tout autre
appareil.
• 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.
POURVOTRESÉCURITÉ: Quefairesi voussentezune
odeur de gaz:
• Ifyourgassuppliercannotbereached, call the
fire department.
• 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.
Installation and service must be performed by a
qualified installer, service agency or the gas
supplier.
OTL Report No. 116-F-47-5
US
• Si vous ne pouvez rejoindre le fournisseur de gaz,
appelez le service dos incendies.
A French manual is available upon request. Order Form Number
850,043CF.
L'installationetservicedoitêtreexécutéparunqualifié
installeur, agencedeserviceoulefournisseurdegaz.
Ce manuel d’installation est disponible en francais, simplement
en faire la demande. Numéro de la pièce 850,043CF.
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Provide adequate clearances around air open-
ings and adequate accessibility clearance for
service and proper operation. Never obstruct
the front openings of the appliance.
Cet appareil peut être installé dans un
maison préfabriquée (É.-U. seulement)
ou mobile déjà installée à demeure si
les réglements locaux le permettent.
Cet appareil doit être utilisé uniquement
avec les types de gaz indiqués sur la
plaque signalétique. Ne pas l'utiliser
avec d'autres gaz sauf si un kit de con-
version certifié est installé.
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
oftheNational Fuel GasCode(ANSIZ223.1)
or, in Canada, the latest edition of the
CAN1-B149.1 and .2 codes.
Theseappliancesaredesignedtooperateon
natural or propane gas only.
Millivolt And Electronic Models -
Millivolt and Electronic models come standard
with the manually-modulated gas valve; flame
appearanceandheatoutputcanbecontrolledat
the gas valve.
Test gage 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). A 1/8" NPT test gage connec-
tion is provided at the inlet and outlet side of
the electronic gas control valve.
Table1 showstheunits' gasorificesizefor
the elevations indicated.
Input of millivolt and electronic models is
shown in the following table:
The millivolt appliances are manually controlled
andfeatureasparkignitor(piezo)thatallowsthe
appliance's pilot gas to be lit without the use of
matches or batteries. This system provides
continuedserviceintheeventofapoweroutage.
Minimum inlet gas pressure to these appli-
ances is 5.0 inches water column (1.24 kPa)
for natural gas and 11 inches water column
(2.74kPa)forpropaneforthepurposeofinput
adjustment.
Millivolt And Electronic Models with
Manually-Modulated Gas Valve
Natural Gas
Propane Gas
Input
Input
Model No.
MPLDV30
MPLDV35
MPLDV40
MPLDV45
rate
(BTU/H)
Model No.
MPLDV30
MPLDV35
MPLDV40
MPLDV45
rate
(BTU/H)
Elevation
Feet
(meters)
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.
13,000
to
10,000
11,500
to
9,000
Orifice size
Nat. Prop.
Model
No.
#61
(0.039")
19,000
to
15,000
18,000
to
14,000
MPLDV30 0.070"
#45
MPLDV35
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 sys-
tem at test pressures equal to or less than 1/2
psig (3.5 kPa).
0.048"
#54
(0.082")
0-4500
(0-1372)
25,000
to
18,500
21,500
to
16,500
#41
MPLDV40
(0.096") (0.055")
#40 #53
(0.098") (0.0595")
26,000
to
25,000
to
MPLDV45
20,000
19,000
Table 1
These appliances and their individual shut-off
valves must be disconnected from the gas
supply piping system during any pressure
testingofthatsystematpressuresinexcessof
1/2 psig (3.5 kPa).
All Models -
Donotusetheseappliancesifanyparthasbeen
under water. Immediately call a qualified, pro-
fessional service technician to inspect the ap-
pliance and to replace any parts of the control
system and any gas control which have been
under water.
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.
Theseappliancesmustnotbeconnectedtoa
chimney or flue serving a separate solid fuel
burning appliance.
Efficiencies%
Natural Gas
Steady
Propane
Ne pas se servir de cet appareil s'il a été plongé
dans l'eau, complètement ou en partie. Appeler
untechnicienqualifiépourinspecterl'appareilet
remplacertoutepartiedusystèmedecontrôleet
toute commande qui ont étéplongés dans l'eau.
Models
Steady
State
P4
AFUE P4
AFUE
State
These heater rated appliances are intended
for use as supplemental heaters only. Using
these appliances as a primary heat source
may void the manufacturers warranty.
MPLDV30 58
MPLDV35 60
MPLDV40 58
MPLDV45 58
65
63
63
64
65
58
62
57
60
66
65
67
66
64
63
65
64
65
67
67
This appliance may be installed in an af-
termarket permanently located, manufac-
tured 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 ap-
pliance is not convertible for use with other
gases, unless a certified kit is used.
Carbon Monoxide Poisoning: Early signs of
carbon monoxide poisoning are similar to
the flu with headaches, dizziness and/or
nausea. If you have these signs, obtain fresh
air immediately. Turn off the gas supply to
the appliance and have it serviced by a
qualified professional, as it may not be op-
erating correctly.
Note: Powerventingofdirect ventfireplaces
may result in the reduction of efficiencies by
as much as ten percent. Consider this in
making any venting and heating decisions in
any installation application.
3
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WARNING: FAILURE TO COMPLY WITH
THE INSTALLATION AND OPERATING
INSTRUCTIONS PROVIDED IN THIS
DOCUMENTWILLRESULTINANIMPROP-
ERLY INSTALLED AND OPERATING
APPLIANCE, VOIDING ITS WARRANTY.
ANY CHANGE TO THIS APPLIANCE AND/
OR ITS OPERATING CONTROLS IS DAN-
GEROUS. IMPROPERINSTALLATIONOR
USE OF THIS APPLIANCE CAN CAUSE
SERIOUSINJURYORDEATHFROMFIRE,
BURNS, EXPLOSION OR CARBON MON-
OXIDE POISONING.
AL VENT
TION
HORIZONT
APPLICA
APPLICATION
HORIZONTAL VENT
VERTICAL VENT
(Top Vent
Application)
HORIZONTAL VENT
(Top Vent
Application)
RECESSED
INSTALLATION
HORIZONTAL VENT
APPLICATION
Typical Locations
Figure 2
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.
Shelf Height inches (mm)
Top Vent
Model No.
Secure Vent
44 3/4 (1132)
46 3/4 (1188)
51 3/4 (1314)
Secure Flex
44 3/4 (1132)
46 3/4 (1188)
51 3/4 (1314)
MPLDV30
MPLDV35
MPLDV40/MPLDV45
WARNING: DO NOT PLACE CLOTHING
OR OTHER FLAMMABLE MATERIALS
ON OR NEAR THIS APPLIANCE.
Do not insulate the
space between the
appliance and the
area above it.
AVERTISSEMENT: SURVEILLER LES
ENFANTS. GARDER LES VÊTEMENTS,
LES MEUBLES, L'ESSENCE OU AUTRES
LIQUIDES À VAPEUR INFLAMMABLES À
COTE DE L'APPAREIL.
Shelf Height
(see table)
LOCATION
Shelf Above Fireplace With Top Venting
Figure 3
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. Consideration should be given to
traffic ways, furniture, draperies, etc., due to
elevated surface temperatures (Figure 2 ).
*Note: 3 in. (76mm) above any horizontal/
inclined vent component for the MPLDV30
inallcases,andfortheMPLDV35,MPLDV40
& MPLDV45, when the vent center line is
greater than 48" (1219 mm) above the fire-
place top wrapper surface. Increase this
clearance to 5" (127 mm) for the MPLDV35,
MPLDV40 & MPLDV45, when the vent cen-
terlineislessthan48"(1219mm)abovethe
fireplace top wrapper surface.
1 in. (25.4 mm)
0 in. (0 mm) spacers
BACK
1 in. (25.4 mm)**
0 in. (0 mm) spacers
SIDES
The location should also be free of electrical,
plumbingorotherheating/airconditioningduct-
ing. These direct vent appliances are uniquely
suited for installations requiring a utility shelf
positioned directly above the fireplace. Utility
shelveslikethesearecommonlyusedforlocat-
ing television sets and decorative plants.
TOP SPACERS
FLOOR
0 in. (0 mm)
0 in. (0 mm)
From Bottom of
Unit to Ceiling
64 in. (1626 mm)
1 in. (25.4 mm)*
**Note: See page 6, step 1 for clearance
requirements to the nailing flange located at
each side of the unit and any screw heads
adjacent to it.
VENT
SERVICE CLEARANCES
FRONT
3 Feet. (0.9 meters)
Table 2
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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Toprovideforthelowestpossibleshelfsurface
the venting attached to the top vent should be
routed in a way to minimize obstructions to the
use of the space above the appliance. Do not
insulatethespacebetweentheapplianceand
the area above it. Refer to Figure 3. The
minimumheightfromthebaseoftheappliance
totheundersideofcombustiblematerialsused
to construct a utility shelf in this fashion is
shown in the table in Figure 3.
Massachusetts And New York City, NY
Requirements
Vertical Vent Termination Clearances
Terminatesingle ventcapsrelativetobuilding
components according to Figure 4.
These appliances are approved for installation
in the following USA locations listed in the
following:
Terminate multiple vent terminations accord-
ing to the installation codes listed at the top of
this page.
Massachusetts:
These fireplaces are approved for installation
in the US state of Massachusetts if the follow-
ing additional requirements are met-
TERMINATION HEIGHTS FOR VENTS ABOVE
FLAT OR SLOPED ROOFS
Horizontal Overhang
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 materi-
als. However, if installed on combustible mate-
rials, such as carpeting, vinyl tile, etc., a metal
or wood barrier covering the entire bottom
surface must be used.
2 FT
• Installation and repair must be done by a
plumber or gas fitter licensed in the Common-
wealth of Massachusetts.
• The flexible 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.
Vertical
Wall
MIN.
2 FT MIN.
Lowest
Discharge
Opening
Vent
Termination
H*
Storm Collar
Flashing
X
12
Roof Pitch is X/12
MassachusettsHorizontal VentRequirements
1 inch (25.4 mm) Minimum
Clearance to Combustibles
APPLIANCE AND VENT CLEARANCES
Concentric
Vent Pipe
*H = MINIMUM HEIGHT FROM ROOF TO
LOWEST DISCHARGE OPENING OF VENT
In the Commonwealth of Massachusetts, hori-
zontal terminations installed less than seven
(7) feet above the finished grade must comply
with the following additional requirements:
Refer To Table 2 for approved clearances to
combustibles for the models covered in this
manual,withthefollowingexception:Whenthe
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 2.
H
Roof Pitch
(feet)
Flat to 6/12
1.0
1.25
1.5
• A hard wired carbon monoxide detector 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.
Over 6/12 to 7/12
Over 7/12 to 8/12
Over 8/12 to 9/12
Over 9/12 to 10/12
Over10/12 to 11/12
Over 11/12 to 12/12
2.0
2.5
3.25
4.0
Maintain a minimum 1" (25 mm) clearance
to combustible materials for all vertical
vent elements.
• Ametal or plasticidentificationplatemust be
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
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.
Figure 4
Clearancesfor horizontal vent elementsare
1" (25 mm) at the sides and 1" (25 mm) on
the bottom. Clearances above horizontal
vent elementsare3"(76mm) for all models
and all applications. Exception: Clearance
is 5" (127 mm) for MPLDV35, MPLDV40 &
MPLDV45, when the center line of the hori-
zontal run is less than 48" (1219 mm) above
the fireplace top wrapper surface.
Horizontal Vent Termination Clearances
The horizontal vent termination must have a
minimum of 3" (76 mm) clearance to any over-
headcombustibleprojectionof2-1/2"(64mm)
or less. See Figure 5. For projections exceed-
ing2-1/2" (64mm),seeFigure5. 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
termination is used. For additional vent loca-
tion restrictions, refer to Figure 8 on page 7.
New York City, NY:
These fireplaces are approved for installation
in New York City in the US state of New York.
VENT TERMINATION CLEARANCES
Theseinstructionsshouldbeusedasaguide-
line and do not supersede local codes in any
way. Install vent according to local codes,
these instructions, the current National Fuel
Gas Code (ANSI-Z223.1) in the USA or the
current standards of CAN/CGA-B149.1 and -
B149.2 in Canada.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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TYPICAL INSTALLATION SEQUENCE
Horizontal Vent Termination Clearances
The typical sequence of installation follows,
however,eachinstallationisuniqueresultingin
variations to those described.
Combustible Projection
2-1/2 inches or less in length
All horizontal terminations
Combustible Projection greater
than 2-1/2 inches in length
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-n-
combustible exterior
sidewalls only, if the
SV4.5HT-2 termination
is used.
Seethepagenumbersreferencesinthefollow-
ing steps for detailed procedures.
Ventilated
Soffit
Unventilated
Soffit
Step1. (page 6) Construct the appliance fram-
ing. Position the appliance within the framing
and secure with nailing brackets.
3"
(76 mm)
18"
(457 mm)
12"
(305 mm)
Step 2. (page 6) Route gas supply line to
Termination Kit
appliance location.
Step 3. (page 10) Install the vent system
and exterior termination. Install additional
restrictor, if needed.
Termination Kit
Figure 5 - Side Elevation View
Step 1. FRAMING
Step 4. (page 21) Field Wiring
a. Millivolt Appliances – The operating control
switch is factory installed.
Unit
Nailing Flange
b. Electronic Appliances – Connect 120 Vac
electrical power to the appliance receptacle.
FrametheseappliancesasillustratedinFigure9
onpage8, unlesstheapplianceistobeinstalled
in a corner.
Step 5. (page 22) Make connection to gas
supply.
Side
Framing
See Figure 10 on page 8 for corner framing
installations. All framing details must allow for a
minimum clearance to combustible framing mem-
bers as shown in Table 2 on page 4.
Nailing Flanges Are
Provided At All Four
Corners At 5/8” , 1/2”
And Flush Settings
Step 6. (page 23) Install the logs and glow-
ing embers.
Left Side Top Corner of Fireplace Shown
(Right Side Requirements the Same)
Step7. (page23)Checkoutapplianceoperation.
Iftheapplianceistobeelevatedabovefloorlevel,
asolidcontinuousplatformmustbeconstructed.
Headers may be in direct contact with the appli-
ance top spacers but must not be supported by
themornotchedtofitaroundthem. Allconstruc-
tionabovetheappliancemustbeselfsupporting,
DONOTusetheapplianceforstructuralsupport.
Unit Being Secured By Its Nailing Flanges
To The Framing
Step 8. (page 23) Install glass door frame
assembly.
Note: The nailing flanges, combustible members
and screw heads located in areas directly adjacent
to the nailing flanges, are EXEMPT from the 1”
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” 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.
Step 9. (page 24) Adjust burner to ensure
proper flame appearance.
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 6. Use 8d nails or their equivalent.
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
glassdoor. Removethebottompanelbylifting
and pulling it towards the front.
Unit Being Secured by Its Nailing
Flanges to the Framing
Step 2. ROUTING GAS LINE
Figure 6
Route a 1/2" (13 mm) gas line along the inside
of the left side framing as shown in Figure 7.
Gas lines must be routed, constructed and
made of materials that are in strict accordance
with local codes and regulations.
Left Side
Front Corner of
Fireplace Framing
Openthetwolatches(locatedunderthefirebox
floor) securing the glass door. Remove the
door by tilting it outward at the bottom and
liftingitup.Setthedoorasideprotectingitfrom
inadvertentdamage.SeeFigure39onpage23.
All appliances are factory-equipped with a flex-
ible gas line connector and 1/2 inch shutoff
valve. (See step 6 on page 22).
6-1/2"
(165 mm)
2-1/4"
(57 mm)
4-3/4"
(121 mm)
Figure 7
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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EXTERIOR HORIZONTAL VENT TERMINATION CLEARANCE REQUIREMENTS
NOTE: Local Codes Or Regulations
May Require Different Clearances.
*
See Item D in the Text Below.
P
V
N
N
NOTE: Location Of The Vent Termination
Must Not Interfere With Access To The
Electrical Service.
Center Line
Exterior Wall
Inside
of Termination
Corner Detail
O
*18”
V
G
V
Q
Horizontal
Termination
18”
Inside Corner
Detail D
Ventilated Soffit
A
= 9” in U.S.
= 12” in Canada
A
H
3 ft.
X
B
B
B
D
C
C
A
A
V
V
V
Fixed
Closed
Window
Operable
Window
L
V
3 ft.
V
F
V
J
M
C
B
B
C
V
I
A
X
V
= Air Supply Inlet
= Vent Termination
= Area where Termination is not Permitted
Canadian Installation*
US Installation**
12 inches (30cm)**
6 inches (15cm) for appliances
< 10,000 Btuh (3kW), 9 inches (23cm)
for appliances > 10,000 Btuh (3kW) and
< 50,000 Btuh (15kW), 12 inches (30cm)
for appliances > 50,000 Btuh (15kW)**
A = Clearance above grade, veranda, porch, deck, or balcony. 12 inches (30cm)*
B = Clearance to window or door that may be opened.
C = Clearance to permanently closed window
6 inches (15cm) for appliances
< 10,000 Btuh (3kW), 12 inches (30cm)
for appliances > 10,000 Btuh (3kW)
12 inches (305mm) recommended to
prevent window condensation
9 inches (229mm) recommended to
prevent window condensation
D = Vertical clearance to ventilated soffit located above the
termination within a horizontal distance of 18 inches (458mm)
from the center line of the termination
18 inches (458mm)
18 inches (458mm)
E = Clearance to unventilated soffit***
12 inches (305mm)
12 inches (305mm)
F = Clearance to outside corner
G = Clearance to inside corner
5 inches (12.7cm) minimum
6 inches (15.2cm) minimum
5 inches (12.7cm) minimum
6 inches (15.2cm) minimum
H = Clearance to each inside of center line extended above
meter/regulator assembly
I = Clearance to service regulator vent outlet
3 feet (91cm) within a height of 15 feet
above the meter/regulator assembly*
3 feet (91cm)*
3 feet (91cm) within a height of 15 feet
above the meter/regulator assembly**
3 feet (91cm)**
J = Clearance to nonmechanical air supply inlet to building or 6 inches (15cm) for appliances
6 inches (15cm) for appliances
the combustion air inlet to any other appliance
< 10,000 Btuh (3kW), 12 inches (30cm)
for appliances > 10,000 Btuh (3kW)
< 10,000 Btuh (3kW), 9 inches (23cm)
for appliances > 10,000 Btuh (3kW) and
< 50,000 Btuh (15kW), 12 inches (30cm)
for appliances > 50,000 Btuh (15kW)**
K = Clearance to a mechanical air supply inlet
6 feet (1.83m)*
3 feet (91cm) above if within 10 feet
(3m) horizontally**
L = Clearance above paved sidewalk or paved diveway located 7 feet (2.13m)‡
on public property
7 feet (2.13m)‡
M = Clearance under veranda, porch, deck or balcony
N = Depth of Alcove (Maximum)
12 inches (30cm)*‡
6 feet (1.83m)*
12 inches (30cm)‡
6 feet (1.83m)**
O = Clearance to Termination (Alcove)
P = Width of Alcove (Minimum)
6 inches (15.2mm)*
3 feet (91cm)*
6 inches (15.2mm)**
3 feet (91cm)*
Q = Clearance to Combustible Above (Alcove)
18 inches (457mm)*
18 inches (457mm)**
* In accordance with the current CSA-B149.1 National Gas And Propane Installation Code.
** In accordance with the curent ANSI SZ223.1/NFPA 54 National Fuel Gas Codes.
*** Clearance required to vinyl soffit material - 30 inches (76cm) minimum.
‡ A vent shall not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings and serves both
dwellings.
*‡ Only permitted if veranda, porch, deck or balcony is fully open on a minimum 2 sides beneath the floor:
Figure 8
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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FIREPLACE FRAMING SPECIFICATIONS
Framing should be
constructed of 2 x 4
or larger lumber.
10-1/2
267
Model No.
MPLDV30
A
B
C
D
38
(
)
in.
30 9/16 40 3/4
786 1035
35 9/16 40 3/4
903 1035
40 9/16 45 3/4
1030 1162
45 9/16 45 3/4
1157 1162
16 1/2
419
mm
in.
965
38
16 1/2
419
*7
MPLDV35
MPLDV40
MPLDV45
(178)
5-1/8
(130)
mm
in.
965
43
**12-1/8
(308)
16 1/2
419
mm
in.
1092
43
16 1/2
419
mm
1092
D
B
*9" (229 mm) For MPLDV-35, 40 & 45
**14-1/8" (359 mm) For MPLDV-35, 40 & 45
C
1/2 A
A
Inches (mm)
C is the required framing depth
dimension when the finish material
(drywall) thickness is 1/2 in. (13mm).
Figure 9
Framing
A
Note: The appliance 45° collar can be rotated about its axis to align for
corner installation. Remove interfering corner spacer. This spacer is
used for shipping only.
Model No.
MPLDV30
B
C
37
D
E
in. 30 1/4 52 1/4
mm 768 1327
14 7/64 26 1/8
358 664
940
b
in. 35 1/4 57 1/4 40 1/2 15 7/8 28 5/8
MPLDV35
MPLDV40
MPLDV45
*D
mm 896
in. 40 1/4 62 1/4
mm 1022 1581
1454
1029
44
403
17 5/8 31 1/8
448 791
727
7 (178)
1118
in. 45 1/4 67 1/4 47 1/2 19 3/8 33 5/8
*C
May Be
Removed
May Be
Removed
mm 1149
1708
1207
492
854
a
*E
A
*B
Back wall of chase/enclosure
(including any finishing materials)
Note-
*These dimensions occur when one 45 degree elbow
is connected directly to the appliance collar.
Inches
(millimeters)
Venting requirements for corner installations - the horizontal vent length
“ a” to “ b,” must not exceed 28 inches (711 mm)
Corner Framing with Square Termination (SV4.5HT-2)
Figure 10
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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FIREPLACE SPECIFICATIONS
F
G
6 5/8
(168)
TOP VIEW
E
17
(432)
1
(25.4)
3 5/16 (100 mm)
13 11/64
(335)
10
(254 mm)
A
B
C
H
D
2 9/32
(58)
4 3/4
(121)
FRONT VIEW
RIGHT SIDE VIEW
LEFT SIDE VIEW
Unit Dimensions
Model No.
MPLDV30
A
B
C
D
E
F
G
H
in. 40 1/2 37 1/2 20 5/8 24 1/8 30 1/4 19 3/4
mm 1029 953 534 613 768 502
9 7/8
251
27 1/4
692
in. 40 1/2 37 1/2 20 5/8 29 1/8 35 1/4 24 3/4 12 3/8 27 1/4
mm 1029 953 534 740 895 629 314 692
in. 45 1/2 42 1/2 25 5/8 34 1/8 40 1/4 29 3/4 14 7/8 32 1/4
mm 1156 1080 651 867 1022 756 378 819
in. 45 1/2 42 1/2 25 5/8 39 1/8 45 1/4 34 3/4 17 3/8 32 1/4
mm 1156 1080 651 994 1149 883 441 819
MPLDV35
MPLDV40
MPLDV45
Figure 11
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The vent system may not service multiple
appliances, and must never be connected to a
flueservingasolidfuelburningappliance. The
vent pipe is tested to be run inside an enclos-
ingwall (suchasachase). Thereisnorequire-
ment for inspection openings in the enclosing
wall at any of the joints in the vent pipe.
Step 3. INSTALL THE VENT SYSTEM
General Information
SV4.5CGV-1
Termination
SV4.5FA OR
SV4.5FB Flashing
AND SV4.5SC
STORM COLLAR
Theseinstructionsshouldbeusedasaguide-
line and do not supersede local codes in any
way. Install vent according to local codes,
these instructions, the current National Fuel
Gas Code (ANSI-Z223.1) in the USA or the
current standards of CAN/CGA-B149.1 and -
B149.2 in Canada.
1" (25.4 mm)
Minimum
Clearance to
Combustibles
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 (exterior
wall) vent applications. Refer to the section
relating to your installation. A list of approved
ventingcomponentsisshowninthetableson
page 26.
*SV4.5VF
Firestop/Spacer
These fireplaces are designed, tested
and listed for operation and installation
with, andonlywith, SecureVent™ Direct
Vent System Components, Secure Flex™
FlexibleVentComponentsmanufactured
by Security Chimneys International and
Z-FLEX™ Model GA Venting Systems
listed to UL1777 and ULCS635 manufac-
tured by Flexmaster Canada Limited.
Theseapprovedventsystemcomponents
are labeled for identification. DO NOT
use any other manufacturer's vent com-
ponents with these appliances.
40' Max.
SV4.5L6/12/24/36/48
Vent Sections
(12.2 M)
6' Min.
(1.8 M)
VERTICAL TERMINATION SYSTEMS (ROOF)
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
Figures 13, 17 and 23 through 25 on pages
12, 14 and 15 and their associated Vertical
Vent Tablesillustratethevariousvertical vent-
ing configurations that are possible for use
with these appliances. Secure Vent pipe ap-
plications are shown in these figures; Secure
Flex pipe may also be used.
Thesefireplacesmustbeventeddirectly
to the outside.
Figure 13
AVerticalVentTablesummarizeseachsystem’s
minimumandmaximumverticalandhorizontal
length values that can be used to design and
install the vent components in a variety of
applications.
Determine the venting for the appliance. If the
vent run will include at least 8 feet of vertical
rise, then install the second restrictor in the
appliance collar before connecting any vent
(RefertoFigure12). Placethesecondrestric-
tor inside the fixed restrictor.
Vertical (Offset) Installation
Analyze the vent routing and determine the
quantities of vent sections and number of
elbows required. Refer to Vertical Vent Fig-
ures and Tables on page 14 and 15 to select
the type of vertical installation desired. Vent
sections are available in net lengths of 4-1/2"
(114 mm), 10-1/2" (267 mm), 22-1/2" (572
mm), 34-1/2" (876 mm) and 46-1/2" (1181
mm). Refer to the Vent Section Length Chart
on page 11 for an aid in selecting length
combinations. Elbows are available in 90° and
45° configurations. Refer to Figure 18 for the
SV4.5E45 and SV4.5E90 elbow dimensional
specifications.
Both these vertical vent systems terminate
through the roof. The minimum vent height
above the roof and/or adjacent walls is speci-
fiedinANSIZ223.1-(latestedition)(InCanada,
the current CAN-1 B149 installation code) by
major building codes. Always consult your
local codes for specific requirements. A gen-
eral guide to follow is the Gas Vent Rule (refer
to Figure 4 on page 6 ).
Note: The second restrictor is included within
the firebox.
Fixed Restrictor
Exhaust Vent
Vertical (Straight) Installation
Determine the number of straight vent sec-
tionsrequired.4-1/2"(114mm),10-1/2"(267
mm), 22-1/2" (572 mm), 34-1/2" (876 mm)
and 461/2" (1181 mm) net section lengths
are available. 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.
Second Restrictor (For Vertical Vent Only)
Figure 12
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Where required, a telescopic vent section
(SV4.5LA) maybeusedtoprovidetheinstaller
withanoptionininstallingintightand 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).
VENT SECTION LENGTH CHART
VENT SECTION LENGTH CHART
Nominal
T
O
T
A
L
T
O
T
A
L
Nominal Section
6
12
24
36
48
Section Length
(inches)
6
12
24
36
48
Length (inches)
Net Section
4-1/2 10-1/2 22-1/2 34-1/2 46-1/2
Number of Vent Sections
Net Section
Length (inches)
4-1/2 10-1/2 22-1/2 34-1/2 46-1/2
Number of Vent Sections
Length (inches)
Height of Vent
Height of Vent
Q
T
Q
T
inches
144
ft
inches
4.5
ft
Y
Y
12
1
0
1
0
0
1
0
0
1
0
0
0
1
0
1
1
2
0
0
1
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
0
5
5
5
0
0
0
5
6
6
3
3
3
3
0
0
0
4
4
4
0
0
0
4
4
5
5
5
6
6
4
5
5
7
6
7
0.375
0.75
1
2
0
1
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
1
2
1
2
9
150
12.5
10.5 0.875
15 1.25
19.5 1.625
21 1.75
154.5 12.875
160.5 13.375
172.5 14.375
0
0
The SV4.5LA is fitted with a locking inclined
channel end (identical to a normal vent sec-
tion component) and a plain end with 3 pilot
holes. Slip the plain end over the locking
channel end of a standard SV4.5 vent com-
ponent the required distance and secure with
three #8 x 3/8" screws.
2
1
0
0
3
0
0
1
0
0
1
2
0
2
3
0
1
0
1
0
0
0
1
0
0
0
0
1
0
0
0
0
0
0
0
2
1
3
3
1
3
177
183
186
14.75
15.25
15.5
22.5 1.875
25.5 2.125
31.5 2.625
34.5 2.875
37.5 3.125
190.5 15.875
196.5 16.375
205.5 17.125
Maintain a minimum 1" (25 mm) clearance
to combustible materials for all vertical
vent elements.
43.5 3.625
0
0
0
1
2
0
0
0
1
2
0
2
0
0
0
0
0
0
1
0
3
2
1
3
207
17.25
45
3.75
211.5 17.625
46.5 3.875
49.5 4.125
217.5 18.125
229.5 19.125
232.5 19.375
0
0
0
1
0
1
0
0
0
0
1
1
0
0
0
1
0
1
0
0
1
0
1
0
0
1
0
1
0
0
0
0
0
1
0
0
0
0
0
1
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
1
0
0
0
0
0
1
0
0
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
6
6
0
0
5
5
0
0
0
0
0
6
0
6
6
6
0
0
7
7
7
0
0
8
8
0
9
9
7
7
Clearancesfor horizontal vent elementsare
1" (25 mm) at the sides and 1" (25 mm) on
the bottom. Clearances above horizontal
vent elementsare3"(76mm) for all models
and all applications. Exception: Clearance
is 5" (127 mm) for MPLDV35, MPLDV40 &
MPLDV45, when the center line of the hori-
zontal run is less than 48" (1219 mm) above
the fireplace top wrapper surface.
51
4.25
1
0
0
0
0
0
1
1
0
0
0
0
0
1
1
0
1
0
2
0
0
0
0
1
0
2
0
0
0
0
0
2
1
2
3
0
3
0
0
0
1
2
0
1
0
0
0
1
0
0
2
0
2
2
1
0
0
0
2
0
1
0
0
0
0
0
0
0
0
1
1
1
2
0
2
2
3
2
4
3
2
4
3
3
2
4
3
2
4
3
0
5
55.5 4.625
237
19.75
0
6
57
66
4.75
5.25
241.5 20.125
7
7
246
252
264
276
279
20.5
21
7
8
67.5 5.625
7
8
69
72
5.75
6
22
7
8
23
8
8
73.5 6.125
79.5 6.625
23.25
0
6
280.5 23.375
283.5 23.625
289.5 24.125
301.5 25.125
310.5 25.875
8
9
Thestarterelbowmaynotbeusedifa45degree
vent run is required directly off of the unit.
Refer to Detail - Figure 17.
81
90
6.75
7.5
0
7
0
7
91.5 7.625
0
7
93
96
7.75
8
9
9
A. Attach Supplied 45 Degree Starter Elbow -
Slip the plain end with 3 mounting holes over
the locking channel end of the appliance collar
and secure with three screws.
315
26.5
9
10
7
97.5 8.125
102 8.5
103.5 8.625
325.5 27.125
0
2
0
1
0
0
0
0
0
0
0
3
3
2
0
0
4
3
4
330
336
345
27.5
28
0
8
0
8
108
114
117
9
28.75
10
10
0
10
11
8
B. Support The Elbows - Support the starter
elbow and the vertical portions of the venting
system with support bracket as shown in
Figure 23 - Detail A, on page 14. Do not use
the starter elbow anywhere else in the vent
system if not used on the appliance collar.
SV4.5 rigid and flex components can be used
directly off the collar. Do not return to rigid
sections after using flex sections in a vent run.
9.5
9.75
0
1
1
0
1
0
0
0
1
2
0
1
0
0
0
0
0
0
0
5
0
1
1
6
0
0
0
0
0
3
3
3
0
4
0
4
2
0
0
0
0
0
0
3
0
4
6
5
4
5
6
4
3
5
349.5 29.125
372 31
118.5 9.875
126 10.5
376.5 31.375
379.5 31.625
418.5 34.875
0
9
11
0
11
9
130.5 10.875
135 11.25
423
465
35.25
38.75
0
10
0
10 10
138
11.5
139.5 11.625
142.5 11.875
C. Frame ceiling opening - Use a plumb line
from the ceiling above the appliance to lo-
cate center of the vertical run. Cut and/or
frameanopening,10-1/2"x10-1/2" (267mm
x 267mm) inside dimensions, about this
center mark (Figure 14 ).
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To attach a vent component to the 45 degree
starter elbow, align the dimpled end over the
elbow, 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 15 ).
This seating position is indicated by the
alignment of the arrow and dimple as shown
in Figure 16.
10 1/2” Min.
(267 mm)
10 1/2” Min.
(267 mm)
F. Install firestop/spacer at ceiling - When
usingSecureVent,useSV4.5VFfirestop/spacer
at ceiling joists; when using Secure Flex, use
SF4.5VFfirestop/spacer.Ifthereislivingspace
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.
Push the vent component against the starter
elbow until it fully engages, then twist the
component clockwise, running the dimples
down and along the incline channels until they
seat at the end of the channels.
The unitized design of the Secure Vent com-
ponents 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.
Route the vent sections through the framed
openingandsecurethefirestop/spacerwith8d
nails or other appropriate fasteners at each
corner. Remember to maintain 1" (25 mm)
clearance to combustibles, framing mem-
bers, and attic or ceiling insulation when
runningvertical chimneysections. Atticinsu-
lation shield (96K94) may be used to obtain
the required clearances indicated here. See
installation accessories table on page 25.
Figure 14
D. Attach vent components to 45 degree
starter elbow - Secure Vent SV4.5 direct vent
system components are unitized concentric
pipe components featuring positive twist lock
connections (see Figure 15 ).
Note: Always use the starter elbow directly
at the appliance 45° collar unless rigid
straightpipeofflexpipeisused, asshownin
Figure 17.
All of the appliances covered in this document
are fitted with collars having locking inclined
channels. The dimpled end of the vent compo-
nents fit over the appliance collar to create the
positive twist lock connection.
E. Attachventcomponentstoeachother-Other
vent sections may be added to the previously
installed section in accordance with the require-
ments of the vertical vent figures and tables. To
add another vent component to a length of vent
run, align the dimpled end over the inclined
channel end of the previously installed section,
adjusting the radial alignment until the four
locking dimples are aligned with the inlets of the
four incline channels of the previous section.
Push the vent component against the previous
section until it fully engages, then twist the
componentclockwiserunningthedimplesdown
and along the incline channels until they seat at
the end of the channels.
G. Support the vertical vent run sections -
Note - Proper venting support is very impor-
tant. The weight of the vent must not be
supported by the fireplace in any degree.
First Vent
Component
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 (conven-
tional plumber's tape). Secure the plumber's
tape to the framing members with nails or
screws.
Align the dimple (four places)
with the opening of the locking
incline channel on appliance
collar. Twist vent component
clockwise to engage and seal.
Dimple
Locking
Incline Channel
45 degree starter elbow
Vent / 45 Degree Starter
Elbow Connection
Figure 15
Arrow
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
Blocking
component clockwise to engage and
seal until arrow and dimple align.
Support Straps
(Plumber’s tape)
Dimple
Rigid Or Flex
Venting
Components May
Be Connected
Directly To The 45
Degree Collar.
Locking
Incline Channel
Connected
Vent Sections
8 feet (2.4 m)
Maximum
Arrow
Vent / Vent Section
Connection
Arrow
Detail
Figure 16
1 inch
(25.4 mm)
minimum
clearance to
combustibles
Figure 17
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H. Frame roof opening - Identify location for
vent at the roof. Cut and/or frame opening per
Roof Framing Chart and Figure 19.
Loop the tape around the vent, securing the
ends of the tape to the framing. If desired,
sheet metal screws #6 x 1/2" length may be
used to secure the support straps to the vent
pipe. Refer to Figure 17.
Storm
Collar
H. Change vent direction to horizontal/in-
clined run - At transition from or to a horizon-
tal/inclined run, install the SV4.5E45 and
SV4.5E90 elbows in the same manner as the
straight vent sections. The elbows feature a
twist section to allow them to be routed about
the center axis of their initial collar section to
align with the required direction of the next
vent run element. Twist elbow sections in a
clockwise direction only so as to avoid the
possiblity of unlocking any of the previously
connected vent sections. See Figure 18.
C
D
Figure 21
Framing Dimensions for Roof
L. Installtheverticaltermination-Thefinalstep
involves installation of the SV4.5CGV-1 Vertical
Termination. Extend the vent sections to the
height as shown in the "Vertical vent termination
section" on page 6. The SV4.5CGV-1 Vertical
Termination (Figure 22 ) installs in the exact
same fashion as any other Secure Vent section.
Align the termination over the end of the previ-
ouslyinstalledsection,adjustingtheradialalign-
ment until the four locking dimples of the termi-
nation are aligned with the inlets of the four
inclinechannelsofthelastventsection. Pushthe
terminationdownuntilitfullyengages,thentwist
the termination clockwise running the dimples
down and along the incline channels until they
seat at the end of the channels.
Pitch
0/12
C
D
10-1/2 in. 10-1/2 in.
(267 mm) (267 mm)
6/12
10-1/2 in.
(267 mm) (305 mm)
12 in.
8-1/8"
(206 mm)
4-13/16"
(122 mm)
12/12
10-1/2 in. 17-3/4 in.
(267 mm) (451 mm)
Swivel Joint
Swivel Joint
(360° swivel)
(360° swivel)
Figure 19
SV4.5E45
SV4.5E90
(45° Elbow)
(90° Elbow)
J. Install the roof flashing - Extend the vent
sectionsthroughtheroofstructure. Installthe
roof flashing over the vent section and posi-
tion such that the vent column rises vertically
(use carpenters level) (Figure 20 ). Nail along
perimeter to secure flashing or adjust roofing
to overlap the flashing edges at top and sides
only and trim where necessary. Seal the top
and both sides of the flashing with waterproof
caulking.
Figure 18
I. Continueinstallationofhorizontal/inclined
sections - Continue with the installation of the
straight vent sections in horizontal/inclined
run as described in Step E. Install support
straps every 5' (1.52 m) along horizontal/
inclinedventrunsusingconventionalplumber’s
tape. It is very important that the horizontal/
inclined run be maintained in a straight (no
dips) and slightly elevated plane in a direc-
tion away from the fireplace 1/4" 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.
It is important to maintain the required clear-
ances to combustibles at the top and bottom
for all horizontal/inclined runs.
Figure 22
Maintain a minimum 1" (25 mm) clearance
to combustible materials for all vertical
vent elements.
Figure 20
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
support on multiple joint configurations.
K. Install the storm collar - Install the storm
collar, supplied with the flashing, over the
vent/flashing joint. See Figure 21. Loosen
the storm collar screw. Slide collar down until
it meets the top of the flashing. Tighten the
adjustingscrew.Applynon-combustiblecaulk-
ing or mastic around the circumference of the
joint to provide a water tight seal.
Clearancesfor horizontal vent elementsare
1" (25 mm) at the sides and 1" (25 mm) on
the bottom. Clearances above horizontal
vent elementsare3"(76mm) for all models
and all applications. Exception: Clearance
is 5" (127 mm) for MPLDV35, MPLDV40 &
MPLDV45, when the center line of the hori-
zontal run is less than 48" (1219 mm) above
the fireplace top wrapper surface.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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VERTICAL VENT FIGURES/TABLES
Note: Secure Vent (rigid vent pipe) is shown in the figures; Secure Flex (flexible vent pipe) may
also be used.
WARNING: UNDER NO CIRCUMSTANCES MAY SEPARATE SECTIONS
OF CONCENTRIC FLEXIBLE VENT PIPE BE JOINED TOGETHER.
Note: 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 run ratios that are smaller
are acceptable all the way down to at or near level.
Note:SV4.5VF(SecureVent),SF4.5VF(SecureFlex)firestop/spacermustbeusedanytimeventpipe
passes through a combustible floor or ceiling. SV4.5HF (Secure Vent) or SF4.5HF (Secure Flex)
must be used anytime vent pipe passes through a combustible wall. For the MPLDV35/40/45, with
a center line lower than 48" (1219 mm) above the fireplace top wrapper surface, use SV4.5HF5 or
SF4.5HF5. In all cases the firestop/spacer provided with the termination may be used with the
termination, frame to 5" clearance where applicable.
Note: Two 45 degree elbows may be used in
placeof one90degreeelbow. Thesameriseto
run ratios, as shown in the venting figures for
90 elbows, must be followed if 45 degree
TABLE A
H Maximum
V Minimum
(meters)
elbows are used.
H
(meters)
feet
5
feet
(1.524)
(3.048)
(4.572)
(6.096)
(0.305)
(0.610)
(0.914)
(1.219)
1
2
3
4
10
15
20
*
Ceiling
*Ceiling
Firestop/Spacer
(SV4.5VF)
Firestop/Spacer
(SV4.5VF)
V + H = 40 feet (12.2 m) Max.
H = 20 feet (6.096 meters) Max.
**Wall
Firestop/Spacer
40 feet
(12.2 meters)
Maximum
Detail View
V
Support
Bracket
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
Support
Bracket
**Use Firestop/Spacer SV4.5HF or SF4.5HF when using Secure Vent or Secure Flex respectively.
Use Firestop/Spacer SV4.5HF5 or SF4.5HF5 when using Secure Vent or Secure Flex on horizontal
vent runs for the MPLDV35/40/45 with a center line lower than 48” (1219 mm) above the fireplace
top wrapper surface. In all cases the firestop/spacer provided with the termination may be used
with the termination, frame to 5” clearance where applicable.
*
When using Secure
Flex, use
Firestop/Spacer
SF4.5VF
Example: If 20 feet of (H) horizontal vent run is needed, then 4 feet minimum of (V) vertical
vent will be required.
Note: Install second restrictor in any run
having more than 8 ft. of vertical rise.
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.
Figure 23 - Top Vent - STRAIGHT
Figure 24 - Top Vent - TWO 90 DEGREE ELBOWS
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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VERTICAL VENT FIGURES/TABLES
(continued)
TABLE B
*Ceiling
V Minimum
(meters)
(0.305)
H +
feet
H
1 Maximum
Firestop/Spacer
(SV4.5VF)
V
**Wall
Firestop/Spacer
(meters)
(1.524)
(3.048)
(4.572)
(6.096)
feet
1
5
(0.610)
10
15
20
2
H
(0.914)
3
(1.219)
4
H + H = 20 feet (6.096 m) Max.
1
H
+ H + H = 40 ft. (12.192 m) Max.
V
1
1
Example: If 20 feet of (H) horizontal vent run is
needed, then 4 feet minimum of (V) vertical vent
will be required.
*When using Secure Flex,
use Firestop/Spacer
SF4.5VF
Support
Bracket
This table shows a 1 (V) to 5 (H) ratio. For every
1 foot of (V) vertical, you are allowed 5 feet of (H)
horizontalrun,uptoamaximumhorizontalrunof
20 feet.
Detail View
**Use Firestop/Spacer SV4.5HF or SF4.5HF when using Secure Vent or Secure
Flex respectively. Use Firestop/Spacer SV4.5HF5 or SF4.5HF5 when using
Secure Vent or Secure Flex on horizontal vent runs for the MPLDV35/40/45
with a center line lower than 48” (1219 mm) above the fireplace top wrapper
surface. In all cases the firestop/spacer provided with the termination may
be used with the termination, frame to 5” clearance where applicable.
Figure 25 - Top Vent - THREE ELBOWS
HORIZONTAL (OUTSIDE WALL)
TERMINATION SYSTEM
B. Support The Elbows - Support the starter
C. Plan the vent run -
elbow and the horizontal portions of the vent-
ing system with support bracket as shown in
Figure 29 to 32.
Analyze the vent routing and determine the
types and quantities of sections 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.
Plan the vent lengths so that a joint does not
occur at the intersection of ceiling or roof
joists. Make allowances for elbows as indi-
cated in Figure 18 on page 13.
Figures 26, and Figures 29 to 32 on pages 18
and 19 and their associated Horizontal Vent
Table illustrate the various horizontal venting
configurations that are possible for use with
these appliances. Secure Vent pipe applica-
tions are shown in these figures; Secure Flex
pipe may also be used. A Horizontal Vent Table
summarizeseachsystem’sminimumandmaxi-
mum vertical and horizontal length values that
can be used to design and install the vent
components in a variety of applications.
Both of these horizontal vent systems terminate
through an outside wall. Building Codes limit or
prohibit terminating in specific areas. Refer to
Figure 8 on page 7 for location guidelines.
SecureVent SV4.5direct vent systemcompo-
nents are unitized concentric pipe compo-
nents featuring positive twist lock connection,
(refer to Figure 15 and 16 on page 12). All of
the appliances covered in this document are
fittedwithcollarshavinglockinginclinedchan-
nels. The dimpled end of the vent components
fit over the appliance collar to create the posi-
tive twist lock connection.
Maintain a minimum 1" (25 mm) clearance
to combustible materials for all vertical
vent elements.
A. Attach Supplied 45 Degree Starter Elbow
- Slip the plain end with 3 mounting holes over
the locking channel end of the appliance collar
and secure with three screws.
Clearancesfor horizontal vent elementsare
1" (25 mm) at the sides and 1" (25 mm) on
the bottom. Clearances above horizontal
vent elementsare3"(76mm) for all models
and all applications. Exception: Clearance
is 5" (127 mm) for MPLDV35, MPLDV40 &
MPLDV45, when the center line of the hori-
zontal run is less than 48" (1219 mm) above
the fireplace top wrapper surface.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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D. Frame exterior wall opening -
TYPICAL HORIZONTAL VENT INSTALLATION
Locate the center of the vent outlet on the
exterior wall according to the dimensions
shown in Figure 9 on page 8.
Support
Brackets
Horizontal / Inclined Run
Building
Support
Framing
SV4.5 HT-2
Termination
SV4.5E90
Elbow
Cut and/or frame an opening, 10-1/2" x 12-1/8"
(267 mm x 308mm) inside dimensions, about
this center.
Exterior
Wall
SV4.5L6/12/24/36/48
Vent Sections
E. Frameceilingopening-Iftheverticalroute
is to penetrate a ceiling, use plumb line to
locatethecenterabovetheappliance. Cutand/
or frame an opening, 10-1/2" x 10-1/2" (267
mm x 267 mm) inside dimensions, about this
center (refer to Figure 14 on page 11 ).
Ceiling
Vertical
Rise
Firestop/Spacer
Support Bracket Spacing
Every 5 ft (1.52 m)
SV4.5 HT-2
Termination
See Figure 17 on page 12 for
vertical vent section support.
Exterior
Wall
F. Attach vent components to starter elbow -
To attach a vent component to the the starter
elbow, align the dimpled end over the collar,
adjusting the radial alignment until the four
locking dimples are aligned with the inlets of
the four incline channels on the collar (refer to
Figure 15 on page 12).
Fireplace
Figure 26
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/spacer with 8d nails or
other appropriate fasteners at each corner.
Install support straps every 5 ft. (1.52 m)
along horizontal/inclined vent runs using con-
ventional plumber’s tape. See Figure 26, 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 run ratios that are
smallerareacceptableallthewaydowntoator
near level. Use a carpenter’s level to measure
fromaconstantsurfaceandadjustthesupport
straps as necessary.
Push the vent component against the elbow
untilitfullyengages,thentwistthecomponent
clockwise,runningthedimplesdownandalong
the incline channels until they seat at the end
of the channels. The unitized design of the
SecureVentcomponentswill engageandseal
both the inner and outer pipe elements with
the same procedure. Sealant and securing
screws are not required.
Remember to maintain 1" (25 mm) clearance
tocombustibles, framingmembers, andattic
or ceiling insulation when running vertical
chimney sections.
Note: A 90 or 45 degree elbow may not be
directly attached to the appliance elbow
collar.
It is important to maintain the required clear-
ances to combustibles at the top and bottom
for all horizontal/inclined runs.
I. 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).
G. Attach vent components to each other -
Other vent sections may be added to the pre-
viously installed section in accordance with
the requirements of the vent tables.
Maintain a minimum 1" (25 mm) clearance
to combustible materials for all vertical
vent elements.
Attachthestrapstotheventpipeandsecureto
the framing members with nails or screws.
See Figure 17 on page 12.
To add another vent component to a length of
vent run, align the dimpled end of the compo-
nent over the inclined channel end of the
previously installed section, adjusting the ra-
dial alignment until the four locking dimples
are aligned with the inlets of the four incline
channels of the previous section.
Clearancesfor horizontal vent elementsare
1" (25 mm) at the sides and 1" (25 mm) on
the bottom. Clearances above horizontal
vent elementsare3"(76mm) for all models
and all applications. Exception: Clearance
is 5" (127 mm) for MPLDV35, MPLDV40 &
MPLDV45, when the center line of the hori-
zontal run is less than 48" (1219 mm) above
the fireplace top wrapper surface.
J. Change vent direction - At transition from
or to a horizontal/inclined run, install the
SV4.5E45 and SV4.5E90 elbows in the same
manner as the straight vent sections. The
elbows feature a twist section to allow them
to be routed about the center axis of their
initial collar section to align with the required
direction of the next vent run element. Twist
elbowsectionsinaclockwisedirectiononly
so as to avoid the possiblity of unlocking
any of the previously connected vent sec-
tions. See Figure 18 on page 13.
Pushtheventcomponentagainsttheprevious
section until it fully engages, then twist the
component clockwise running the dimples
down and along the incline channels until they
seat at the end of the channels.This seating
position is indicated by the alignment of the
arrow and dimple as shown in Figure 16 on
page 12.
L. 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 D. 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-2 termination is to be
attached, see Figure 28.
K. Continueinstallationofhorizontal/inclined
sections- Continuewiththeinstallationofthe
straight vent sections in horizontal/inclined
run as described in Step F.
H. Install firestop/spacer at ceiling -
WhenusingSecureVent,useSV4.5VFfirestop/
spaceratceilingjoists;whenusingSecureFlex,
use SF4.5VF firestop/spacer.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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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 Figure
28, refer toTable3onpage18. Thistablelists
the additional venting components needed (in
addition to the termination and adapter) for a
particular range of wall thicknesses.
Firestop/Spacer provided with the
termination shown on the exterior
side of the wall. It may also be
installed on the interior side.
SV4.5 HT-2
Termination
**7"
10-1/2"
(267 mm)
(178)
**12-1/8"
(308 mm)
5-1/8"
(130 mm)
**3” (76 mm)
M. Attach termination adapter - Attach the
adapter (SV4.5RCH - provided with the termi-
nation) to the vent section or telescoping vent
section), elbow as shown in Figure 27 in the
same manner as any SV4.5 vent component
(refer to Step F).
for MPLDV30/35
6 to 48 inch
1"
(25.4 mm)
Vent Section,
Telescopic vent
section on Elbow
Note: Centerline of Vent Piping is
NOT the Same as the Centerline of
the Frame Opening.
N. Install Firestop/Spacer at exterior wall -
When using the square termination, install
the SV4.5HF (Secure Vent) or SF4.5HF (Se-
cure Flex) Firestop/Spacer over the open-
ing at the exterior side of the framing (long
side up) as shown in Figure 27, and fasten
into place. Ensure 5" clearance is main-
tained by framing above the vent run for
MPLDV35/40/45 when center line of the
run is lower than 48" (12119 mm) above
the fireplace top wrapper surface.
Adapter
SV4.5RCH
See Figure 9 on page 8
for Min. Distance to Base
of Appliance.
**Increase these dimensions by 2” (51mm) for MPLDV35/40/45
with horizontal vent runs with center lines lower than 48”
(1219mm) above the fireplace for wrapper surface.
Base of Appliance
Installing the Square Horizontal Termination (SV4.5HT-2)
Figure 27
*Use silicone caulking to
seal the top and sides of
the termination, up to the
underlayment, stucco, or
masonry wall surface.
Maximum wall thickness
10 in.(254 mm)**
(The Firestop/Spacer may also be installed
over the opening at the interior side of the
framing.)
Interior Surface of
Finished Wall
Exterior Surface of Siding
Exterior Surface of
Framing
Maximum Extent of
Vent Run Sections
Relative to Exterior
Surface of Framing
Siding
*Caulk
O. Install the desired termination -
6 in. to 9-1/4 in.
(152 to 235 mm)**
Last Vent Section. Use
Tel escopi c Vent
Section (SV4.5LA), If
Necessary
1. Install thesquaretermination(SV4.5HT-2)-
For the last step , from outside the exterior wall,
slide the collars of the termination onto the
adapter (the outer over the outer and the inner
insidetheinner)untiltheterminationseatsagainst
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 28.
SV4.5HT-2
Square Termination
*Caulk
SV4.5HT-2
Square Termination
Adapter
SV4.5RCH
1-1/4" Maximum Recess of
Square Termination into
Exterior Finishing Material
**For thicknesses greater
than 10” , see Table 3.
Stucco
SVHRK Snorkel Cap –The snorkel cap is de-
signed to be fitted into a basement window box.
The SVHRK cap is for use with flex vent. The
vertical distance between the inlet and outlet of
the cap is 28 in. (711 mm). pipe.
Venting Connection and Exterior Wall Recessing of the
Horizontal Square Termination (SV4.5HT-2).
Figure 28
Horizontal terminations have been designed to perform in a wide range of weather
conditions. Our terminations meet or exceed industry standards.
IMPORTANT: The vent termination is
hotwhileinoperationandforaperiodof
time following use of the fireplace. To
prevent contact with hot surfaces, we
recommend the use of a Termination
Guard. This can be purchased at your
local dealer.
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.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
17
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HORIZONTAL VENT FIGURES/TABLES
Note: Secure Vent components (rigid vent pipe and terminal) are
shown in the figures; Secure Flex components (flexible vent pipe and
terminal) may also be used.
The SV4.5HF or SF4.5HF firestop provided with each termination can be
usedasshowninFigure29 whenfittedattheexteriorwalladjacenttothe
termination.
Note: Two45degreeelbowsmaybeusedinplaceofone90degreeelbow.
The same rise to run ratios, as shown in the venting figures for 90 degree
elbows, must be followed if 45 degree elbows are used.
WARNING: UNDER NO CIRCUMSTANCES MAY SEPA-
RATE SECTIONS OF CONCENTRIC FLEXIBLE VENT PIPE
BE JOINED TOGETHER.
Note: It is very important that the horizontal/inclined run be main-
tained 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(20mmpermeter)whichisideal, thoughriseperfootrunratiosthat
are smaller are acceptable all the way down to at or near level.
TABLE 3
Venting Components Required for Various Exterior Wall
Thicknesses, When Using The Square Termination (SV4.5HT-2)
Note: SV4.5VF (Secure Vent), SF4.5VF (Secure Flex) firestop/spacer
must be used anytime vent pipe passes through a combustible floor or
ceiling. Lennox MPLDV35"/40" & 45" models require 5" clearances to
combustibles above horizontal vent runs when the centerline of the
horizontal vent run is at or below 48" (1219 mm) above the fireplace top
wrapper. In all other instances, with these three models and with the
MPLDV30 in all instances, the clearance to combustibles above horizon-
tal vent runs is 3". Please note that to facilitate the 5" clearance when
required, we have two 5" clearance firestops. The SV4.5HF5 is for use
with rigid (Secure Vent™ ) and the SF4.5HF5 is for use with (Secure
Flex™ ). These firestops should be used whenever horizontal vent runs
meetingtheuserequirementsdetailedabove, penetratewallsseparating
occupied rooms in a house.
Exterior Wall Thickness
Venting Components Required
inches (mm)
Termination Kit Only
6 to 9-1/4 (152 to 235)
Termination Kit and 6 in. Vent
Section (SV4.5L6)
10-1/2 to 13-3/4 (267 to 349)
Termination Kit and 12 in. Vent
Section (SV4.5L12)
16-1/2 to 19-3/4 (419 to 502)
11 to 19-3/4 (279 to 502)
Termination Kit and Telescopic
Section (SV4.5LA 2 to 7-12 in.)
& 6 in. vent section (SV4.5L6)
Each of our horizontal terminations are shipped with a standard 3"
clearancehorizontalfirestop. InALLcasesthisfirestopmaybeusedatthe
exterior wall regardless of any circumstances that may require the 5"
clearance to combustibles above the horizontal vent component. The
firestop provided with the termination is not specific for use with any
particular clearance height.
SV4.5HF/SF4.5HF
Firestop
SV4.5HF/SF4.5HF
Firestop
Stud
Framing
Stud
Framing
Top
Spacer
Top
Spacer
5”
3”
1”
1”
1”
1”
1”
1”
3” Clearance
5” Clearance
Figure 29
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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*Use Firestop/Spacer SV4.5HF or SF4.5HF
when using Secure Vent or Secure Flex
respectively. Use Firestop/Spacer SV4.5HF5
or SF4.5HF5 when using Secure Vent or
Secure Flex on horizontal vent runs for the
MPLDV35/40/45 with a center line lower than
48” (1219 mm) above the fireplace top
wrapper surface. In all cases the
Example: If 20 feet of (H)
horizontalventrunisneeded,
then 4 feet minimum of (V)
vertical vent will be required.
TABLE C
H Maximum V Minimum
(meters)
(1.524)
(3.048)
(4.572)
(6.096)
(meters)
(0.305)
(0.610)
(0.914)
(1.219)
feet
5
feet
1
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.
firestop/spacer provided with the termination
may be used with the termination, frame to
5” clearance where applicable.
10
15
20
2
3
4
V + H = 40 feet (12.2 m) Max.
H = 20 ft. (6.096 m) Max.
H
H
Support
Bracket
V
*Wall
Firestop/Spacer
**Wall
Firestop/Spacer
*Ceiling
Firestop/Spacer
(SV4.5VF)
H = 28 inches (711 mm) Maximum
*When using Secure Flex, use
Firestop/Spacer SF4.5VF
Square termination (SV4.5HT-2) shown.
**Use Firestop/Spacer SV4.5HF or SF4.5HF when using
Secure Vent or Secure Flex respectively. Use
Firestop/Spacer SV4.5HF5 or SF4.5HF5 when using
Secure Vent or Secure Flex on horizontal vent runs for
the MPLDV35/40/45 with a center line lower than 48”
(1219 mm) above the fireplace top wrapper surface.
In all cases the firestop/spacer provided with the
termination may be used with the termination, frame
to 5” clearance where applicable.
Figure 31 - Top Vent - ONE 90 DEGREE ELBOW -
CONNECTION DIRECTLY AT APPLIANCE
Support
Bracket
Square termination (SV4.5HT-2) shown.
See Table 3 as an aid in venting component selection
for a particular range of exterior wall thicknesses.
Figure 30 - Top Vent - ONE 90 DEGREE ELBOW - ELBOW
CONNECTION NOT DIRECTLY AT APPLIANCE
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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HORIZONTAL VENT FIGURES/TABLES (CONTINUED)
**Wall
Firestop/Spacer
TABLE D
V Minimum
(meters)
H
feet
5
+ H1 Maximum
H
(meters)
(1.524)
(3.048)
(4.572)
(6.096)
feet
1
2
3
4
(0.305)
(0.610)
(0.914)
(1.219)
H
1
V*
10
15
20
***Note - When using
Secure Flex, use
**Wall
Firestop/Spacer
Firestop/Spacer SF4.5VF
H
V + + H = 40 feet (12.2 m) Max.
1
**Use Firestop/Spacer SV4.5HF or SF4.5HF when
using Secure Vent or Secure Flex respectively. Use
Firestop/Spacer SV4.5HF5 or SF4.5HF5 when using
Secure Vent or Secure Flex on horizontal vent runs
for the MPLDV35/40/45 with a center line lower than
48” (1219 mm) above the fireplace top wrapper
surface. In all cases the firestop/spacer provided
with the termination may be used with the
H
+ H = 20 ft. (6.096 m) Max.
***Ceiling
Firestop/Spacer
(SV4.5VF)
1
Example: If 20 feet of (H) horizontal vent run
isneeded, then4feetminimumof(V)vertical
vent will be required.
Support Bracket
*
To Top Surface Of
Fireplace
termination, frame to 5” clearance where applicable.
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.
Square termination (SV4.5HT-2) shown.
See Table 3 on page 18 as an aid in venting component selection for a particular range
of exterior wall thicknesses.
Figure 32 - Top Vent - TWO 90 DEGREE ELBOWS - ELBOW CONNECTION NOT DIRECTLY AT APPLIANCE
**When using Secure Flex, use
Firestop/Spacer SF4.5VF
H
TABLE E
V
H
+ H1 Maximum
+ V
1 Minimum
1
(meters)
(0.305)
(0.610)
(0.914)
(1.219)
(meters)
feet
1
feet
5
(1.524)
(3.048)
(4.572)
(6.096)
**Ceiling
Firestop/Spacer
(SV4.5VF)
10
15
20
2
3
4
H
***Wall
Firestop/Spacer
H
+ H = 20 feet (6.096 m) Max.
1
V
1
V
H
+ V + + H = 40 ft. (12.192 m) Max.
1
1
Example: If 20 feet of (H) horizontal vent
run is needed, then 4 feet minimum of (V)
vertical vent will be required.
V*
***Use Firestop/Spacer SV4.5HF
or SF4.5HF when using Secure
Vent or Secure Flex respectively.
Use Firestop/Spacer SV4.5HF5
or SF4.5HF5 when using Secure
Vent or Secure Flex on horizontal
vent runs for the MPLDV35/40/45
with a center line lower than 48”
(1219 mm) above the fireplace
top wrapper surface. In all cases
the firestop/spacer provided with
the termination may be used with
the termination, frame to 5”
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 maxi-
mum horizontal run of 20 feet.
**Ceiling
Firestop/Spacer
(SV4.5VF)
***Wall
Firestop/Spacer
Support Bracket
*To Top Surface
Of Fireplace
clearance where applicable.
Square termination (SV4.5HT-2) shown.
See Table 3 on page 18 as an aid in venting component selection for a particular range of exterior wall thicknesses.
Figure 33 - Top Vent - THREE 90 DEGREE ELBOWS - ELBOW CONNECTION NOT DIRECTLY AT APPLIANCE
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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VERTICAL OR HORIZONTAL VENTING USING
SECURE FLEX KITS AND COMPONENTS
FLEX VENT
NOTE: OUTER PIPE IS PULLED AWAY TO
SHOW THE DETAIL OF THE INNER PIPE
Secure Flex venting kits and components may
be used in any venting application where rigid
Secure Vent (SV4.5) direct vent components
can be used. All restrictions, clearances and
allowancesthatpertaintotherigidpipingapply
to the flexible venting. Secure Flex kits may
notbemodified;also, undernocircumstances
may separate sections of flex pipe be joined
together. Secure Flex kits may be added to the
end of a vent run made up of rigid Secure Vent
(SV4.5) vent sections provided that doing so
does not violate any of the venting length,
height, routing, horizontal to vertical ratio re-
quirements or clearance considerations de-
tailed in this manual.
SECURING SCREW
(3 PLACES EQUIDISTANT
JUST BELOW GEAR CLAMP)
Apply ONLY MIL-PAC BLACK HIGH
TEMPERATURE SEALANT (Catalog No.
10K81) to the outside surface of both
collars of the adapter (be especially
careful to fill the grooves of the outer
collar to be covered by the flexible
pipe) and slide flexible pipe over
inner and outer adapter collars.
GEAR
CLAMPS
1-3/4 in. (44 mm)
Flexible Pipe and
Adapter Outer
1-3/4 in. (44 mm)
Flexible Pipe and
Adapter Inner
Collar Overlap
SecureFlexkitscomewithanincludedadapter
that can be fitted to the appliance collar or the
inclined channel end of the last Secure Vent
(SV4.5) vent section in a rigid system in the
exact same fashion as any other Secure Vent
section. Align the dimpled end of the adapter
over the previously installed section or appli-
ance collar, adjusting the radial alignment until
the four locking dimples of the adapter are
aligned with the inlets of the four incline chan-
nels of the last vent section or collar. Push on
the adapter until it fully engages, then twist the
adapter clockwise running the dimples down
and along the incline channels until they seat at
the end of the channels.
Collar Overlap
Adapter
(SV4.5RF)
SECURING SCREW
(3 PLACES EQUIDISTANT
JUST BELOW GEAR CLAMP)
Attach Adapter to Appliance
Collar, or Secure Vent Sections
Figure 34
SV4.5HF (Secure Vent) or SF4.5HF (Secure
Flex) must be used anytime vent pipe passes
through a combustible wall. For the
MPLDV35/40/45withacenterlinelower than
48" (1219 mm) above the fireplace top wrap-
persurfaceuseSV4.5HF5orSV4.5HF5. Inall
cases the firestop/spacer provided with the
termination may be used with the termina-
tion, frame to 5" clearance where applicable.
2. ApplyabeadofMill-PacBlack(700°F)high
temperature sealant - Catalog No. 10K81) to
the outer adapter collar; to the grooves of the
collar which extend approximately 1 inch from
theendandtotheflatsurface,approximately1-
3/8 inches from the end.
3. Pull and extend the outer flexible vent pipe.
4. Slide the outer flex pipe over the adapter
collar. Ensure the flexible vent pipe com-
pletely engages the adapter collar to a dis-
tance of 1-3/4 inches from the end, and that
it is free from damage or tears.
Attach the flexible vent to the adapter as
follows (also see Figure 34 ):
A. Install the Inner Flex Pipe -
1. Installthesmall gearclamplooselyaroundthe
innerflexibleventpipe,pushitbackoutoftheway.
2. Apply a bead of Mill-Pac Black (700°F)
high temperature sealant - Catalog No.
10K81) to the inner adapter collar, approxi-
mately 1/2 inch from the end.
See the appropriate sections and figures
shown throughout the venting section for
their installation requirements.
5. Slide the gear clamp down and tighten it
fully to secure the flexible vent to the adapter
outer collar approximately 3/4 inch from the
end of the flex.
Flexible Vent Section
6. Install three screws 120 degrees apart
through the flexible vent pipe and into the
adapter collar just below the gear clamp to
provide additional security to the connection.
3. Pull and extend the inner flexible vent pipe.
4. Slide the inner flex pipe over the adapter
collar.Ensuretheflexibleventpipecompletely
engages the adapter collar to a distance of 1³⁄₄
inches from the end, and that it is free from
damage or tears.
C. Route Flex Vent -
Ensure that the flex vent is properly routed to
provide the required clearance. Do Not allow
theflexibleventtobendinaradiustighterthan
5" (127 mm). Refer to Figure 35. Support
horizontal sections of flex with metal straps at
2 foot (0.61 m) intervals.
5. Slide the gear clamp down and tighten it
fully to secure the flexible vent to the adapter
inner collar approximately 3/4 inch from the
end of the flex.
6. Install three screws 120 degrees apart
through the flexible vent pipe and into the
adapter collar just below the gear clamp to
provide additional security to the connection.
5" (127 mm)
Radius Minimum
Figure 35
E. Attach Flex Vent to Termination -
D. Install Firestop/Spacers at ceilings and walls -
When Secure Flex penetrates a wall or ceil-
ing, a firestop/spacer is required: use SV4.5
(Secure Vent), SF4.5 (Secure Flex) firestop/
spacer anytime vent pipe passes through a
combustible floor or ceiling.
Secure Flex components can be purchased
separately and attached to bulk lengths of
Secure Flex flexible tubing cut to size at the
jobsite. SecuretheflexibleventtotheSecure
Flex terminations in the same manner (see
Figure 34) as it was attached to the adapter.
B. Install the Outer Flex Pipe -
1. Install the large gear clamp loosely around
the outer flexible vent pipe, push it back out of
the way.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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Note: Secure Flex vent must be attached to
Secure Flex terminations only. DO NOT
substitute Secure Vent terminations or the
Secure Vent adapter for Secure Flex compo-
nents. The collars of Secure Flex termina-
tions and adapters have a different circum-
ference than that used with the Secure Vent
pipe. Additionally, Secure Flexcomponents
have an extended length center tube for use
in attaching the flexible vent.
4.Ifanoptionalcontrolswitchisinstalled,turn
the appliance-mounted ON/OFF burner con-
trol switch to the OFF position.
Optional wall-mounted switch, thermostat, or
one of the optional remote control kits may
also be used. The appliance mounted ON/OFF
switch needs to be relocated onto the optional
style view door, if used.
B. Electronic Wiring (See Figure 37 ) –
Note: The electronic appliance must be con-
nected to the main power supply.
7. If wall-mounted ON/OFF control or thermo-
stat is to be used, mount it in a convenient
location on a wall near the fireplace.
1. Route a 3-wire 120Vac 60Hz 1ph power
supply to the appliance junction box.
8. If an optional control is to be used, wire it in
the low voltage circuit as shown in Figure 37.
Step 4. FIELD WIRING
2. Remove the electrical inlet cover plate from
the side of the unit by removing the plate's
securing screws. See Figure 11 on page 9.
Note: The supplied 15 feet of 2 conductor wire
has one end of each conductor connected to the
gas valve circuit and the other end of each
conductor placed loose inside the bottom com-
partment.
Caution: Label all wires prior to disconnec-
tion when servicing controls. Wiring errors
can cause improper and dangerous opera-
tion. Verifyproperoperationafterservicing.
3. Removethe coverplate'sknockoutandthen
feed the power supply wire through the knock-
out opening and into the unit junction box.
Refer to Section A for millivolt appliances and
Section B for electronic appliances. The gas
valve is set in place and pre-wired at the
factory on both models.
9. If an optional control switch is installed,
turn the appliance-mounted ON/OFF burner
control switch to the OFF position.
4. Connect the black power supply wire to the
lower outlet's red pigtail lead and the white
power supply wire to the common terminal of
the outlet as shown in Figure 37.
A. Millivolt Wiring (See Figure 36 ) –
10. After the wiring is complete, replace the
cover plate.
1. Appliance-mounted ON/OFF burner control
switch (rocker switch) is factory installed be-
hind the bottom panel. Optional wall-mounted
switch, thermostat, or one of the optional
remote control kits may also be used.
5.Connectthegroundsupplywiretothepigtail
lead attached to outlet's green ground screw.
Note: No batteries to be installed in the
battery holder until a power outage, or if the
appliance is to be operated solely with two
(2) "D" batteries.
6. Appliance-mounted ON/OFF burner control
switch (rocker switch) is factory installed be-
hind the bottom panel.
2. If wall-mounted ON/OFF control or thermo-
stat is selected mount it in a convenient loca-
tion on a wall near the fireplace.
120 VAC
INTERMITTENT ELECTRONIC WIRING DIAGRAM
SPARK TO PILOT IGNITOR
BK
GR
W
3. Wire the control switch within the millivolt
controlcircuit usingthe15feetof2conductor
wire supplied with the unit.
BK
Note: The supplied 15 feet of 2 conductor
wire has one end of each conductor con-
nected to the gas valve circuit and the other
end of each conductor placed loose inside
the bottom compartment.
IGNITOR MODULE
3V
JUNCTION BOX
BLACK (IGNITOR)
BLACK (SENSOR)
TRANSFORMER 3V
Caution: Do Not connect the optional wall
switch to a 120V power supply.
WIRING DIAGRAM MILLIVOLT GAS VALVES
THERMOPILE
BLACK
TO WALL
SWITCH OR
THERMOSTAT
APPLIANCE- MOUNTED
ON/OFF SWITCH
ORANGE (THTP)
BLACK (TP)
BATTERY BACK-UP
TP-TH
T O P I L
HI
LO
TP
TH
RED
GREEN (TH)
BROWN
GAS VALVE
BK/W(1)
BK/W(1)
BROWN
Figure 37
WALL-MOUNTED ON/OFF SWITCH (OPTIONAL)
THERMOSTAT (OPTIONAL)
Figure 36
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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IMPORTANT: Ground supply lead must
be connected to the wire attached to the
green ground screw located on the out-
let box. See Figure 37. Failure to do so
will result in a potential safety hazard.
The appliance must be electrically
groundedinaccordancewithlocal codes
or, in the absence of local codes, the
National Electrical Code, ANSI/NFPA70-
(latest edition). (In Canada, the current
CSA C22-1 Canadian Electrical Code.)
Gas Line Access Plate Not Installed
At The Factory. It Is Included In
The Installation Instruction Bag.
Step 5. CONNECTING GAS LINE
Gas
Supply
Line
ON/OFF
Switch
All codes require a shut-off valve mounted in
the supply line. The orientation of the shut-
off valve should face the front, as shown in
Figure 39. Figure 38 illustrates the method
for connecting the gas supply.
Gas Valve
Piezo Ignitor
Shut-Off Valve
(Orientation
Air Shutter
Adjustment Arm
As Shown)
Figure 39
The flex-line method is acceptable in the U.S.,
however,Canadianrequirementsvarydepend-
ing on locality. Installation must be in compli-
ance with local codes.
These appliances come from the factory with
the gas line access plate removed to provide
full access to the end of the gas flex line.
Secure all joints tightly using appropriate
tools and sealing compounds (ensure pro-
pane resistant compounds are used in pro-
pane applications).
As designed, the glass door needs to be
opened to access the open gas access area.
Route a hard pipe from the left to a spot
directly below the access plate opening.
Theseappliancesareequippedwithagasflex
line for use in connecting the unit to the gas
line. A gas flex line is provided to aid in
attaching the direct vent appliance to the gas
supply.
Turn on gas supply and test for gas leaks,
using a gas leak test solution (also referred to
as bubble leak solution).
Note: Usingasoapywater solution(50%dish
soap, 50% water) is an effective leak test
solution but it is not recommended, because
the soap residue that is left on the pipes/
fittingscanresultincorrosionovertime. Never
use an open flame to check for leaks.
Bring the shutoff valve on the end of the flex
line over to the hard pipe and tighten with
wrenches from above through the firebox
opening.
The gas flex line can only be used where local
codes permit. See Figure 38 for flex line
description. The flex line is rated for both
natural and propane gas. A manual shut off
valve is also provided with the flex line.
If required, access the valve by removing the
lower control compartment panel (see Figure
39 ) by lifting and pulling the panel forward.
The millivolt and electronic control valve has a
3/8" (10 mm) NPT thread inlet port.
A. Light the appliance (refer to the lighting
instructions label in the control compartment
or in the Homeowner's Care and Operation
Instructions).
The gas control valve is located in the lower
control compartment.
B. Brush all joints and connections with the
gas leak test solution to check for leaks. If
bubbles are formed, or gas odor is detected,
turn the gas control knob to the “OFF” posi-
tion. Either tighten or refasten the leaking
connection and retest as described above.
Flex Line Connector
3/8" NPT x 3/8"
Flare Fitting
1/2" x 3/8" Flare
Shut-Off Valve
Gas
Stub
Gas
Valve
C. When the gas lines are tested and leak free,
be sure to rinse off the leak testing solution.
3/8" Flex Tubing
D. When the gas lines are tested and leak free,
observe the individual tongues of flame on the
burner. Make sure all ports are open and
producing flame evenly across the burner. If
any ports are blocked, or partially blocked,
clean out the ports.
Figure 38 - GAS CONNECTION
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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Millivolt Appliance Checkout
Step 6. INSTALLING THE LOGS, GLOW-
ING EMBERS AND VOLCANIC STONES
Step 8. INSTALLING THE GLASS DOOR
AND OPTIONAL HOOD
The pilot flame should be steady, not lifting or
floating. Flame should be blue in color with
traces of orange at the outer edge.
Remove the gas line access plate and gasket
from the provided plastic bag and install them
over the opening, using the provided screws
(4) as shown in Figure 39.
To access the glass door securing latches,
first open the lower control compartment
door (Figure 42 ) by lifting and pulling the
bottom panel forward.
The top 3/8" (10 mm) at the pilot generator
(thermopile) and the top 1/8" min (tip) of the
quick drop out thermocouple should be en-
gulfed in the pilot flame.
Retrieve the glass door. Visually inspect the
gasket on the backside of the frame. Gasket
surface must be clean, free of irregularities and
seated firmly.
Refer to Figure 43 and loosen the set screw
for the venturi air shutter. Manually actuate
the air shutter through several cycles. Set the
air shutter to 3/32" before placing the logs.
The flame should project 1" (25 mm) beyond
the hood at all three ports (Figure 40 ). Re-
place logs if removed for pilot inspection.
Positionthedoorinfrontofthefireboxopening
with the bottom of the door held away from the
fireplace (Figure 42 ). Hook the top flange of
thedoorframeoverthetopofthefireboxframe.
Let the bottom of the door frame swing gently
in towards the fireplace ensuring that the gas-
ket seats evenly as the door frame draws shut.
Fasten the two latches located underneath the
firebox floor to the door's vee-flange. Close
both the latches securely.
The logs are packaged in a carton located
within the firebox. One plastic bag of glowing
embers and volcanic stones are located in the
bottom compartment. Refer to the Log Set
Placement Supplement for detailed place-
ment instructions for the logs, glowing em-
bers and volcanic stones.
To light the burner; turn “ON” the remote wall
switch and rotate the gas valve control knob
counterclockwise to the “ON” position (“ON”
will be at the bottom side of the valve).
Hood Ignitor Rod
MILLIVOLT
Proper log and twig placement is critical to
encourage outstanding flame appearance and
prevent sooting. These fires are designed to
provide a rich orange/red glow on the logs.
Ensure the bottom of the rear log is fully seated
and pulled as far forward as the pins will al-
low. Refer to the Log Set Placement
Supplement for detailed instructions.
Thermocouple
If desired, install the optional hood. Note the
location of the three clips inside the top air
channel above the door. The clips are equally
spaced on the top surface of the air channel
opening. Use a screwdriver to open the clips
slightly if needed. Engage the back edge of the
eyebrow into the clips to secure.
3/8" Min
(9 mm)
Pilot
Nozzels
Note: Logsetupisbydesignasymmetric. The
fire is intentionally positioned off center to
provide a natural fire look.
Thermopile
Figure 40
Step 7. CHECKINGAPPLIANCEOPERATION
Electronic Appliance Checkout
Withgaslineinstalledruninitialsystemcheck-
out before closing up the front of the unit.
Follow the pilot lighting instructions provided
in the Homeowner's Care and Operation In-
structions. For piezo ignitor location see Fig-
ure 39 on page 23 (millivolt appliances only).
To light the burner, turn ‘ON’ the unit mounted
On/Off switch or the optional remote wall
switch. Ensure the ignitor lights the pilot. The
pilot flame should engulf the flame rod as
shown in Figure 41.
Burner
Assembly
Note: Lighting Instructions are also found on
the literature tag tied to the gas piping next to
the gas valve. To access the tag, open the
lowercontrolcompartmentdoor(Figure39 on
page 23 ) by pulling the panel forward.
ELECTRONIC
Door
Sensor
Ignitor
Pilot
Hood
Assembly
Gas Line Access Panel
Bottom Panel
When first lighting the appliance, it will take
a few minutes for the line to purge itself of
air. Once purging is complete, the pilot and
burner will light and operate as indicated in
the instruction manual. Subsequent lighting
of the appliance will not require such purg-
ing. Inspect the pilot flame (remove logs, if
necessary, handling carefully).
Figure 42 -
INSTALLING THE GLASS DOOR
WARNING: HANDLE THIS GLASS WITH
EXTREME CARE! THE GLASS PANEL IS
SUSCEPTIBLE TO DAMAGE — DO NOT
SCRATCH WHILE HANDLING OR WHILE
RE-INSTALLING THE GLASS DOOR
FRAME.
Figure 41
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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The adjustment rod and associated adjustable
air shutter is patented technology. Flame ad-
justments can be made quickly and accurately
to taste without the need of disassembling the
appliance and waiting for 30 minutes after
each adjustment.
WARNING: DO NOT OPERATE APPLI-
ANCE WITH THE GLASS FRONT RE-
MOVED, CRACKED OR BROKEN. RE-
PLACEMENT OF THE GLASS SHOULD
BEDONEBYALICENSEDORQUALIFIED
SERVICE TECHNICIAN.
CAUTION: THE AIR SHUTTER DOOR
AND NEARBY APPLIANCE SURFACES
ARE HOT. EXERCISE CAUTION TO
AVOID INJURY WHILE ADJUSTING
FLAME APPEARANCE.
Propane models may exhibit a flame pattern
that may candle or appear stringy. If this is
problematic or persists as the appliance is
continually operated, adjust the air shutter
closedasdescribedinthepreviousparagraphs.
Operatetheapplianceforaperiodoftimeasthe
effect diminishes, ensuring that the appliance
does not develop sooty flames.
To adjust the flame, rotate the lever arm up or
down (rod located in the lower control area).
Position the air shutter to the factory setting as
shown in the table in Figure 43. Allow the
burner to operate for at least 20 minutes.
Step 9. BURNER ADJUSTMENTS
Flame Appearance and sooting
Proper flame appearance is a matter of taste.
Generally, mostpeoplepreferthewarmglowof
a yellow to orange flame. Appliances operated
with air shutter openings that are too large will
exhibit flames that are blue and transparent.
These weak, blue and transparent flames are
termed anemic. If the air shutter opening is too
small sooting may develop.
Air Shutter Rod
Air
Adjustment
Arm
When satisfied that the appliance operates
properly, proceed to finish the installation.
Leave the control knob in the ON position and
theremoteswitchOFF.Closethelowercontrol
compartment door.
Venturi
Sooting is indicated by black puffs developing
at the tips of very long orange flames. Sooting
results in black deposits forming on the logs,
appliance inside surfaces and on exterior sur-
facesadjacent tothevent termination. Sooting
is caused by incomplete combustion in the
flames and lack of combustion air entering the
air shutter opening. To achieve a warm yellow
to orange flame with an orange body that does
notsoot, theshutteropeningmustbeadjusted
between these two extremes.
FINISHING REQUIREMENTS
Wall Details
Valve
Complete finished interior wall. To install the
appliance facing flush with the finished wall,
positionframeworktoaccommodatethethick-
ness of the finished wall (Figure 44 )
MAIN BURNER
FACTORY SHUTTER OPENING SETTING
Natural Gas Propane Gas
Models
inches (mm) inches (mm)
MPLDV30 3/32 (2.38)
MPLDV35 1/16 (1.6)
MPLDV40 1/4 (6.35)
MPLDV45 1/4 (6.35)
3/16 (4.76)
1/4 (6.35)
3/8 (9.5)
This Area Must
Combustible
Remain Clear
Finished Wall
of Combustible
Materials
Materials
No smoke or soot should be present. These
logs are designed to be involved in the fire.
Flameswillimpingethetoptipsoftherightand
left logs.
1/2 (12.7)
3-1/2" Min
(89 mm)
Combustible
materials not
allowed
Figure 43
If the logs are properly positioned and sooting
conditions exist, the air shutter opening on the
main burner tube should be adjusted. Normally,
the more offsets in the vent system, the greater
the need for the air shutter to be opened further.
below this
point on
the face of the
appliance.
CAUTION: DO NOT BEND THE AIR SHUTTER
ROD. MAKESURETHEAIRSHUTTERMOVES
WHEN THE LEVER ARM IS OPERATED.
Top of
Appliance
Spacer
10" Min
(254 mm)
Burner Adjustment
Note: When first operating the air shutter
adjustment lever arm observe the air shutter.
If it is not moving, open the glass, ensure the
air shutter screw is loose and adjust by hand
through a couple of cycles, to break the adhe-
sion of paint, if required. Close door and
adjust with the lever as needed.
Top of Door Frame
Optional Hood
WARNING: AIR SHUTTER ADJUST-
MENT SHOULD ONLY BE PER-
FORMED BY A QUALIFIED PROFES-
SIONAL SERVICE TECHNICIAN.
Figure 44
A hearth extension is not required with this
appliance. If ahearthextensionisused, donot
block the lower control compartment door.
Any hearth extension used is for appearance
onlyanddoesnothavetoconformtostandard
hearth extension installation requirements.
Observe the flame continuously. If it appears
weak or sooty as previously described, adjust
the air shutter by rotating the adjustment arm
upordown(refertoFigure39)untiltheflame
appearance is as desired.
IMPORTANT:ENSURETHATTHEFRONT
GLASSPANELISINPLACEANDSEALED
DURING ADJUSTMENT.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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Note: Combustible wall finish materials and/or surround materials must not be allowed to be placed in direct contact with the area defined
by the appliance front face (black sheet metal). Never allow combustible materials to overlap the appliance front face. See Figure 44
on page 25. Combustible mantle materials may be placed in front of non-combustible facing materials, as shown in Figure 45.
Non-combustible materials, such as surrounds and other appliance trim, may be installed on the appliance front face with these exceptions: they must
not cover any portion of the glass or hood; they may cover any portion of the top radiant panel or the air gaps surrounding the top radiant panel up
to the installed hood.
Vertical installation clearances to combustible mantels vary according to the depth of the mantel. See Figure 45. 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 hood.
Combustible materials may project beyond the
sides of the fireplace opening as long as they
are kept within the shaded areas illustrated in
Figure 46.
MANTEL CLEARANCES
Inches (mm)
12 (305) MANTEL
10 (254) MANTEL
8 (203) MANTEL
6 (152) MANTEL
4 (102) MANTEL
2 (51) MANTEL
Combustible Materials
Allowed In Shaded
Top View Of
Area “ Safe Zone”
Fireplace
12"
18
5"
(457)
45°
16
(406)
17"
14
TOP OF
APPLIANCE
(356)
12
(305)
Min. Distance
To Protected
Side Wall
8-1/4"
10
(254)
8
Side
Wall
(203)
Side
Wall
Min. Distance To
Unprotected Side Wall
14"
Figure 46
Figure 45
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
holesandotheropeningsshouldbecaulkedorstuffedwithunfacedfiberglassinsulation. Incoldclimates,ifthefireplaceisbeinginstalledonacement
slab, a sheet of plywood or other raised platform can be placed underneath to prevent conducting cold up into the room. It also helps to sheetrock
inside surfaces and tape for maximum air tightness and caulk firestops.
INSTALLATION ACCESSORIES
Listed Secure Flex™Components
Listed Secure Vent™Components
Cat.
No.
Model
No.
Description
Cat.No.
Model No. Description
**94L10 SV4.5HTSS Horizontal Small Square
Termination with
10K81 SFMP
Mil Pac Black Hi-Temperature
Sealant
t
n
a
l
a
e
S
Firestop/Spacer (96K80)
and Adapter (74L61)
89L40 SFMP-12 Mil Pac Black Hi-Temperature
Sealant - Bulk Pack 12
91L66 SF-GC4-6 Gear Clamp 4.5in. (114 mm) for
**98L27 SV4.5HTSSL Horizontal Small Square-
Long Termination with
Flex (6 pieces)
91L67 SF-GC7-6 Gear Clamp 7.5 in. (190.5 mm)
for Flex (6 pieces)
Firestop/Spacer (96K80)
and Adapter (74L61)
H2248
SF4.5HF Firestop/Spacer - 10 Pack
**May be used with 30" and 35" models only.
Horizontal (3-1-1 spacing)
H2249
SF4.5VF Firestop/Spacer - 10 Pack
Vertical (1-1-1 spacing)
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
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INSTALLATION ACCESSORIES CONTINUED
Listed Secure Vent™Components
Model No. Description
Listed Secure Flex™Components
Cat.
No.
Model
No.
Cat.No.
Description
H1968
SV4.5HT-2 Horizontal Square Termination
with Firestop/Spacer (96K80)
and Adapter (74L61)
These termination kits include firestop/spacer, gear clamps and flex adapter.
H1969 SF4.5HT-2 Horizontal Square Termination
without Flex
77L87 SFKIT12
77L88 SFKIT18
77L89 SFKIT24
77L90 SFKIT36
77L91 SFKIT48
56L74 SFVT30
Flex Square Term. with 12 in.
(305 mm of *compressed Flex
Flex Square Term. with 18 in.
(457 mm) of *compressed Flex
Flex Square Term. with 24 in.
(610 mm) of *compressed Flex
Flex Square Term. with 36 in.
(914 mm) of *compressed Flex
Flex Square Term. with 48 in.
(1219 mm) of *compressed Flex
Vertical Termin. for Flex (flat to
6/12) with Flex Adapter, section
of rigid vent, roof support collar
assembly, roof flashing and
storm collar.
H2152
SV4.5CGV-1 Vertical Termination
H4687
H4716
SV4.5CTS Chase Top Term. Square
SV4.5CTS-B Chase Top Term. Square, Blk
H4717 SV4.5CTS-TC Terra Cotta Termination
77L70
SV4.5L6 6 inch (152 mm) Vent Section
12 inch (305 mm) Vent
Section
77L71
SV4.5L12
24 inch (610 mm) Vent
Section
77L72
77L73
77L74
SV4.5L24
36 inch (914 mm) Vent
Section
SV4.5L36
48 inch (1219 mm) Vent
SV4.5L48
Section
56L75 SFVT45
Vertical Termin. for Flex (6/12 to
12/12) with Flex Adapter section
of rigid vent, roof support collar
assembly, roof flashing and
storm collar.
77L75
77L76
SV4.5LA Telescopic Section
SV4.5E45 45 Degree Elbow
60L10 SF-18
98K03 SF-12
18 ft. (5.49 m) *compressed Flex
12 ft.(3.66 m) *compressed Flex
77L77
SV4.5E90 90 Degree Elbow
Cat. No. Model No. Description
These termination kits include firestop/spacer, gear clamps and flex adapter.
The following flashings come packaged with a storm collar.
77L78
77L79
77L80
77L81
SV4.5F Flat Roof Flashing
**94L09 SF-HTSS
Horizontal Small Square
Termination without Flex
SV4.5FA 1/12 to 7/12 Adjust. Flashing
SV4.5FB 7/12 to 12/12 Adjust. Flashing
SV4.5SC6 Storm Collars (6 collars/box)
**94L04 SFKIT12SS Flex Small Square Term. with
12 in. (305 mm of
*compressed Flex
**94L05 SFKIT18SS Flex Small Square Term. with
H6183
H6184
H2247
96K93
SV4.5HF5 Firestop/Spacer Horizontal
(5-1-1 spacing)
SF4.5HF5 Firestop/Spacer Flex Horizontal
(5-1-1 spacing)
SV4.5VF Firestop/Spacer - 10 Pack
Vertical (1-1-1 spacing)
SV4.5SU Support Strap
18 in. (457 mm) of
*compressed Flex
**94L06 SFKIT24SS Flex Small Square Term. with
24 in. (610 mm) of
*compressed Flex
**94L07 SFKIT36SS Flex Small Square Term. with
36 in. (914 mm) of
*compressed Flex
**94L08 SFKIT48SS Flex Small Square Term. with
96K94
SV4.5RSA Attic Insulation Shield
SV4.5SP Support Plate
48 in. (1219 mm ) of
*compressed Flex
96K92
87L02
Cat. No. Model No. Description
H1988 CTSA-33
H1985 CTSO-33
H1987 CTSO-44
H1986 CTSO-46
H5820 4.5HTSK
Chase Top Shroud Kit,
Arch Top 3 x 3
Chase Top Shroud Kit,
Open Top 3 x 3
Chase Top Shroud Kit,
Open Top 4 x 4
Chase Top Shroud Kit,
Open Top 4 x 6
SV4.5 Termination Guard
HGS
99L03 SV4.5HRK36 Horizontal Riser Kit 36"
99L02 SV4.5HRK14 Horizontal Riser Kit 14"
Termnation Shroud Kit
*All compressed flex vents can be expanded up to two times.
**May be used with 30" and 35" models only.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
27
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GAS CONVERSION KITS
WARNING: THIS CONVERSION KIT SHALL BE
AVERTISSEMENT: CET ÉQUIPEMENT DE CONVERSION
INSTALLED BY A QUALIFIED SERVICE AGENCY IN SERAINSTALLÉPARUNEAGENCEQUALIFIÉEDESERVICE
ACCORDANCE WITH THE MANUFACTURER'S IN- CONFORMÉMENTAUXINSTRUCTIONSDUFABRICANTET
STRUCTIONS AND ALL APPLICABLE CODES AND
TOUTES EXIGENCES ET CODES APPLICABLES DE
REQUIREMENTS OF THE AUTHORIZED HAVING L'AUTORISÉSAVOIRLAJURIDICTION. SIL'INFORMATION
JURISDICTION. IF THE INFORMATION IN THESE DANS CETTE INSTRUCTION N'EST PAS SUIVIE
INSTRUCTIONS IS NOT FOLLOWED EXACTLY, A
EXACTEMENT, UN FEU, EXPLOSION OU PRODUCTION DE
FIRE, EXPLOSION OR PRODUCTION OF CARBON PROTOXYDEDECARBONEPEUTRÉSULTERLEDOMMAGES
MONOXIDE MAY RESULT CAUSING PROPERTY CAUSER DE PROPRIÉTÉ, PERTE OU BLESSURE
DAMAGE, PERSONAL INJURY OR LOSS OF LIFE.
PERSONNELLEDEVIE. L'AGENCEQUALIFIÉEDESERVICE
THE INSTALLATION IS NOT PROPER AND COM- EST ESPONSABLE DE L'INSTALLATION PROPRE DE CET
PLETEUNTILTHEOPERATIONOFTHECONVERTED ÉQUIPMENT. L'INSTALLATION N'EST PAS PROPRE ET
APPLIANCE IS CHECKED AS SPECIFIED IN THE
COMPLÉTE JUSQU'À L'OPÉRATION DE L'APPAREIL
OWNERINSTRUCTIONSSUPPLIEDWITHTHEKIT. CONVERTIESTCHÉQUESUIVANTLESCRITÈRESÉTABLIS
THE QUALIFIED SERVICE AGENCY PERFORMING DANS LES INSTRUCTIONS DE PROPRIÉTAIRE
THIS INSTALLATION ASSUMES RESPONSIBILITY
FOR THIS CONVERSION.
PROVISIONNÉES AVEC L'ÉQUIPEMENT.
In Canada:
Millivolt Appliances
Step 4. SIT Systems - Refer to Figure 48 on
Natural To Propane Gas Conversion Kit
Models No. Unit Type Catalog No.
THE CONVERSION SHALL BE CARRIED OUT
INACCORDANCEWITHTHEREQUIREMENTS
OF THE PROVINCIAL AUTHORITIES HAVING
JURISDICTION AND IN ACCORDANCE WITH
THE REQUIREMENTS OF THE CAN1-B149.1
AND .2 INSTALLATION CODE.
page 29 and the instructions provided with
the kit. Using a Torx T20, remove and discard
thethreepressureregulatormountingscrews.
Remove the pressure regulator, spring, pop-
pet, diaphragm and bushing. Discard all
removed components.
MPLDV30
MPLDV35
MPLDV40
MPLDV45
MPLDV30
MPLDV35
MPLDV40
MPLDV45
millivolt
millivolt
H6163
H6975
H6177
85L69
H6166
H6973
H6168
H6169
millivolt
millivolt
LA CONVERSION DEVRA ÊTRE EFFECTUÉE
CONFORMÉMENT AUX RECOMMANDATIONS
DES AUTORITÉS PROVINCIALES AYANT
JURIDICTION ET CONFORMÉMENT AUX
EXIGENCES DU CODE D'INSTALLATION CAN1-
B149.1 ET.2.
electronic
electronic
electronic
electrnoic
Ensure the rubber gasket installed on the back
of the replacement pressure regulator is prop-
erly positioned and install the new pressure
regulator using the new screws supplied with
the kit. Tighten screws to 25 In. lb. torque.
Gas conversion kits are available to adapt your
appliance from the use of one type of gas to the
useofanother. Thesekitscontainalltheneces-
sary components needed to complete the task
including labeling that must be affixed to en-
sure safe operation.
Burner Assembly
Propane to Natural Gas Conversion Kit
Model No.
MPLDV30
MPLDV35
MPLDV40
MPLDV45
MPLDV30
MPLDV35
MPLDV40
MPLDV45
Unit Type Catalog No.
millivolt
millivolt
H6165
H6968
85L59
85L62
H6170
H6974
H6172
H6173
millivolt
Kitpartnumbersarelistedhere andthefollowing
steps detail the conversion procedure.
Orifice
Gas Valve
millivolt
Assembly
electronic
electronic
electronic
electronic
Step 1. Turn off the gas supply to the appliance.
Step 2. Carefully remove the logs. Exercise
care so as not to break the logs.
Step 3. Refer to Figure 47.
Remove the burner assembly with attached
venturi tube.
Air Adjustment
Arm
Figure 47
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
28
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Pressure-Tap
(Inlet)
Pilot Stage
Terminal
Pilot Gas
Outlet
Pressure
Regulator
Ground
(TP)
P I L O T
HI
LO
Supply
Gas Inlet
Remove
These
Components
Gas Outlet
To Burner
Figure 48
Step 5. Attach manometer to the manifold
side pressure test fitting and verify manifold
pressurereads3.5incheswatercolumn(0.87
kPa) for natural gas, and 10.0 inches water
column (2.49 kPa) for propane gas.
Burner Stage
Terminal
Regulator
Mounting Screw
Pressure-Tap
(Manifold)
Figure 50
Step 6. Refer to Figure 49 and remove the
pilot hood assembly to access the hexed pilot
orifice. Remove and replace the orifice with
the one provided with the kit.
ELECTRONIC
Orifice size
Model No.
Sensor
Ignitor
Pilot
Hood
Natural Propane
#61
0.070"
MPLDV-30
MPLDV-35
MPLDV-40
MPLDV-45
(0.039")
#45
0.048"
(0.082")
#41
#54
(0.046") (0.055")
Pilot
Orifice
#40
#53
(0.098") (0.595")
Figure 49
Note: If the ignitor is damaged, a replacement
kit is available, order Catalog Number 87L54.
Electronic Appliances
Figure 51
Step 7. Dexen Electronic Valves -
Figure 52
See Figure 50 and the instructions provided
with the kit. Remove and discard the two
pressure regulator mounting screws. Re-
move the pressure regulator and diaphragm.
Discard all removed components. Ensure the
provided diaphragm is installed properly onto
thereplacement pressureregulator andinstall
the new pressure regulator using the new
screws supplied with the kit. Tighten screws.
All Models
Step 9. Reassemble the remaining compo-
nents by reversing the procedures outlined in
theprecedingsteps. Usepipejointcompound
orTeflontapeonallpipefittingsbeforeinstall-
ing (ensure propane resistant compounds are
used in propane applications, do not use pipe
joint compounds on flare fittings).
Step 8. (Refer to Figure 47 on page 28 )
A. Remove the orifice from the manifold and
replace it with the one provided in the kit. See
the following table for orifice sizes for natural
andpropanemodels. Figure52 illustratesthe
orifice.
See Figure 51 and replace the pilot orifice
as follows: Remove pilot hood assembly to
access the phillipped pilot orifice. Remove
and replace the orifice with the one pro-
vided with the kit. Exercise extreme care
to prevent damage to or breakage of the
ignitor assembly.
B. Retrievetheburnerandslidetheventuritube
over the orifice. Set the shutter adjusting
opening as shown in Figure 43, page 25.
Step 10. Attach the conversion label provided
in the conversion kit to the rating plate on the
appliance.
Step 11. Turn on gas supply and test for gas
leaks.
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
29
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30
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31
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Lennox Hearth Products reserves the right to make changes at any time, without notice, in design, materials, specifications, prices and also to discontinue colors, styles and products.
Consult your local distributor for fireplace code information.
Printed in U.S.A. © 2007 by Lennox Hearth Products
1110 West Taft Avenue • Orange, CA 92865
P/N 850,043M REV. E 06/2008
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