Lennox Merit Plus Series, MPD Pro Series, MPDP40IP, MPDP35IN, MPDP40IN Installation Instructions Manual
...
INSTALLATION INSTRUCTIONS
AVERTISSEMENT : Assurez-vous de bien suivre les
instructions données dans cette notice pour réduire au
minimum le risque d’incindie ou d’explosion ou pour
éviter tout dommage matériel, toute blessure ou la mort.
WARNING: If the information in these instructions
is not followed exactly, a fire or explosion may
result, causing property damage, personal injury,
or death.
WARNING /AVERTISSEMENT/AVISO
• HOT GLASS WILL CAUSE
BURNS.
• DO NOT TOUCH GLASS
UNTIL COOLED.
• NEVER ALLOW CHILDREN
TO TOUCH GLASS.
• UNE SURFACE VITRÉE CHAUDE
PEUT CAUSER DES BRÛLURES.
• LAISSER REFROIDIR LA SURFACE
VITRÉE AVANT D'Y TOUCHER.
• NE PERMETTEZ JAMAIS À UN ENFANT
DE TOUCHER LA SURFACE VITRÉE.
• EL VIDRIO CALIENTE
CAUSARÁ QUEMADURAS.
• USTED DEBE NUNCA
TOCAR EL VIDRIO CALIENTE.
• LOS NIÑOS DEBEN NUNCA
TOCAR EL VIDRIO.
- Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
- WHAT TO DO IF YOU SMELL GAS:
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use any
phone in your building.
• Immediately call your gas supplier from a
neighbor’s phone. Follow the gas supplier’s
instructions.
• If you cannot reach your gas supplier, call the fire
department.
- Installation and service must be performed by a
qualified installer, service agency or the gas supplier.
- Ne pas entreposer ni utilizer d’essence ni d’autres vapeurs
ou liquides inflammables dans le voisinage de cet appareil
ou de tout autre appareil.
- QUE FAIRE SI VOUS SENTEZ UNE ODEUR DE GAZ :
• Ne pas tenter d’allumer d’appareil.
• Ne touchez à aucan interrupteur. Ne pas vous servir des
téléphones se trouvant dans le bâtiment où vous trouvez.
• Appelez immédiatement votre fournisseur de gaz depuis
un voisin. Suivez les instructions du fournisseur.
• Si vous ne pouvez rejoindre le fournisseur de gaz,
appelez le service des incindies.
- L’installation et l’entretien doivent être assurés par un
installateur ou un service d’entretien qualifié ou par le
fournisseur de gaz.
MPD Pro Direct-Vent
Gas Fireplaces
P/N 506015-06 Rev. NC 06/2012
This manual is one of a set of two supporting this product.
Refer to P/N 506017-05 for Care and Operation Instructions.
Ce manuel est disponible en francais, simplement
en faire la demande. Numéro de la pièce 506223-39.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future reference.
INSTALLATEUR : Laissez cette notice avec l’appareil.
CONSOMMATEUR : Conservez cette notice pour
consultation ultérieure.
This appliance may be installed in an aftermarket permanently located, manufactured home (USA only) or mobile
home, where not prohibited by local codes. This appliance is only for use with the type of gas indicated on the rating
plate. This appliance is not convertible for use with other gases, unless a certified kit is used.
MODELS
US
OTL Report No. 116-F-59-5
Please read and understand these instructions
before starting installation.
MPDP35IN
MPDP40IN
Portland
ELECTRONIC:
MPDP35IP
MPDP40IP
LENNOX HEARTH PRODUCTS • MERIT PLUS® DIRECT VENT GAS FIREPLACES (MPDP35/40) • INSTALLATION INSTRUCTIONS
TABLE OF CONTENTS
Packaging . . . . . . . . . . . . . . . . . . . . . . . . . 2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
General Information . . . . . . . . . . . . . . . . . . 2
Requirements for the
Commonwealth of Massachusetts . . . . . 4
Cold Climate Insulation . . . . . . . . . . . . . . . 5
Manufactured Home Requirements . . . . . . 5
Location . . . . . . . . . . . . . . . . . . . . . . . . . . .5
Vent Termination Clearances . . . . . . . . . . . 6
Appliance and Vent Clearances . . . . . . . . . 8
Wall Finishes/Surrounds/Mantels. . . . . . . . 8
Pre-Installation Steps . . . . . . . . . . . . . . . . . 9
Typical Installation Sequence . . . . . . . . . . 9
Detailed Installation Steps . . . . . . . . . . . . . 9
Step 1. Framing . . . . . . . . . . . . . . . . . . . . . 9
Fireplace and Framing Specifications . . . 10
Step 2. Routing Gas Line . . . . . . . . . . . . . 11
Step 3. Preparing Appliance Vent Collar . . 12
Step 4. Installing Vent System . . . . . . . . . 12
Vent Restrictor Installation . . . . . . . . . . . 13
Vertical Termination Systems (Roof) . . . 15
Vent Section Length Chart . . . . . . . . . . . 15
Vertical Vent Tables and Figures . . . . . . . 18
Horizontal (Outside Wall) Termination
System . . . . . . . . . . . . . . . . . . . . . . . 20
Horizontal Vent Tables and Figures . . . . 22
Venting Using Flexible Vent Pipe . . . . . . 25
Step 5. Field Wiring . . . . . . . . . . . . . . . . 26
Step 6. Remote Control System . . . . . . . 27
Step 7. Connecting Gas Line . . . . . . . . . 28
Step 8. Verifying Appliance Operation . . . . 28
Step 9. Installing Volcanic Stone,
Glowing Embers, and Logs . . . . . . . . . 29
Step 10. Remove/Install Glass Door . . . . 32
Step 11. Burner Adjustments . . . . . . . . . . 32
Step 12. Hood Installation . . . . . . . . . . . . 34
Finishing Requirements . . . . . . . . . . . . . . 34
Step 13. Attaching Safety-in-Operation
Warnings . . . . . . . . . . . . . . . . . . . . . . . 35
Installation Accessories . . . . . . . . . . . . . . 36
Gas Conversion Kits . . . . . . . . . . . . . . . . 38
Please read and understand these
instructions before beginning your
installation.
2
PACKAGING
The assembled vented gas fireplace heater is
packaged with:
• (1 set) Logs (packaged in a carton inside the
firebox).
• (1 bag) Glowing Embers and (1 bag) Volcanic
Stone (in bottom compartment).
• Literature Kit (envelope in bottom com-
partment containing Care and Operation
Instructions, Installation Instructions, Safety-
In-Operation Warning Labels w/instructions,
Warranty).
• (1) Top Vent Flue Restrictor
• (1) Rear Vent Restrictor Plate
• (1) U-shaped Vent Restrictor
• (1) Top Standoff (taped to outer wrapper)
• (1) Hood (taped to outer wrapper)
• (1) Remote Control Kit and Receiver Kit
Required Firebox Liner Kits
(One of the following kits must be installed
- sold separately)
• H8572 - Black Porcelain, MPDP35
• H8573 - Black Porcelain, MPDP40
• H8595 - Brickaded, MPDP35
• H8596 - Brickaded, MPDP40
INTRODUCTION
These Electronic appliances are designed to
operate on natural or propane gas. The system
is switchable between standing and intermittent pilot modes. External electrical power is
required to operate these units. In the event
of a power outage, four (4) "AA" batteries (in
receiver) can be used as a backup (excluding
blower operation).
These vented gas fireplace heaters are sealed
combustion, air-circulating gas fireplaces designed for residential applications.
Approved Vent Components
These fireplaces are designed, tested and listed
for operation and installation with the following
vent components only:
®
• Secure Vent
nents manufactured by Security Chimneys
International,
• Secure Flex
manufactured by Security Chimneys International and
• Z-FLEX
to UL1777 and ULCS635 manufactured by
Flexmaster Canada Limited.
Use only the correct size venting (4-1/2" inner
and 7-1/2" outer).
These approved vent system components are
labeled for identification. DO NOT use any
other manufacturer’s vent components with
these appliances.
Direct-Vent System Compo-
®
Flexible Vent Components
®
Model GA Venting Systems listed
GENERAL INFORMATION
WARNING
Young children should be carefully supervised when they are
in the same room as the appliance. Toddlers, young children
and others may be susceptible
to accidental contact burns. A
physical barrier is recommended
if there are at risk individuals in
the house. To restrict access to
a fireplace or stove, install an
adjustable safety gate to keep
toddlers, young children and
other at risk individuals out of
the room and away from hot
surfaces.
AVERTISSEMENT
Les jeunes enfants devraient être
surveillés étroitement lorsqu’ils
se trouvent dans la même pièce
que l’appareil. Les tout petits,
les jeunes enfants ou les adultes
peuvent subir des brûlures s’ils
viennent en contact avec la surface chaude. Il est recommandé
d’installer une barrière physique
si des personnes à risques habitent la maison. Pour empêcher
l’accès à un foyer ou à un poêle,
installez une barrière de sécurité; cette mesure empêchera les
tout petits, les jeunes enfants et
toute autre personne à risque
d’avoir accès à la pièce et aux
surfaces chaudes.
Children and adults should be alerted to the
hazards of high surface temperature and
should stay away to avoid burns or clothing
ignition.
Les enfants et les adultes devraient être
infor-més des dangers que posent les
températures de surface élevées et se
tenir à distance afin d’éviter des brûlures
ou que leurs vêtements ne s’enflamment.
DO NOT ATTEMPT TO ALTER OR MODIFY
THE CONSTRUCTION OF THE APPLIANCE
OR ITS COMPONENTS. ANY MODIFICATION
OR ALTERATION MAY VOID THE WARRANTY,
CERTIFICATION AND LISTINGS OF THIS UNIT.
LENNOX HEARTH PRODUCTS • MERIT PLUS® DIRECT VENT GAS FIREPLACES (MPDP35/40) • INSTALLATION INSTRUCTIONS
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause injury
or property damage. Refer to
this manual. For assistance or
additional information consult
a qualified installer, service
agency or the gas supplier.
WARNING
Failure to comply with these
installation instructions will result
in an improperly installed and
operating appliance, voiding its
warranty. Any change to this appliance and/or its operating controls
is dangerous.
WARNING
Clothing or other flammable
material should not be placed
on or near the appliance.
AVERTISSEMENT
On ne devrait pas placer de
vêtements ni d’autres matières
inflammables sur l’appareil ni à
proximité.
WARNING
Any safety screen or guard
removed for servicing the appliance must be replaced prior to
operating the appliance.
AVERTISSEMENT
Tout écran ou protecteur retiré
pour permettre l’entretien de
l’appareil doit être remis en
place avant de mettre l’appareil
en marche.
WARNING
Improper installation or use of
this appliance can cause serious
injury or death from fire, burns,
explosion or carbon monoxide
poisoning.
WARNING
Failure to position the parts in
accordance with these diagrams
or failure to use only parts specifically approved with this appliance
may result in property damage or
personal injury.
AVERTISSEMENT
Risque de dommages ou de
blessures si les pièces ne sont
pas installées conformément à
ces schémas et ou si des pièces
autres que celles spécifiquement
approuvées avec cet appareil sont
utilisées.
Note: Installation and repair should be done
by a qualified service person. The appliance
should be inspected before use and at least
annually by a professional service person.
More frequent cleaning may be required due
to excessive lint from carpeting, bedding
material, etcetera. It is imperative that control
compartments, burners and circulating air
passageways of the appliance be kept clean.
Remarque: L’installation et la réparation
devrait être confiées à un technicien qualifié. L’appareil devrait faire l’objet d’une
inspection par un technicien professionnel
avant d’être utilisé et au moins une fois
l’an par la suite. Des nettoyages plus
fréquents peuvent être nécessaires si les
tapis, la literie, et cetera produisent une
quantité importante de pous-sière. Il est
essentiel que les compartiments abritant
les commandes, les brûleurs et les conduits de circulation d’air de l’appareil
soient tenus propres.
Do not use these appliances if any part
has been under water. Immediately call a
qualified, professional service technician
to inspect the appliance and to replace
any parts of the control system and any
gas control which have been under water.
Ne pas utiliser cet appareil s’il a été
plongé, même partiellement, dans
l’eau. Appeler un technicien qualifié
pour inspecter l’appareil et remplacer
toute partie du système de commande
et toute commande qui a été plongée
dans l’eau.
Only trim kit(s) supplied by the manufacturer
shall be used in the installation of this appliance.
Seules les trousses de garniture fournies
par le fabricant doivent être utilisées pour
l’installation de cet appareil.
These appliances comply with National
Safety Standards and are tested and listed
by OMNI-Test Laboratories, Inc. (Report No.
116-F-59-5) to ANSI Z21.88-2009 (in Canada,
CSA-2.33-2009), and CAN/CGA-2.17-M91
(R2009) in both USA and Canada, as vented
gas fireplace heaters.
These appliances are listed by OMNI-Test
Laboratories for installation in bedrooms
and Manufactured Homes.
Misc. Codes / Standards
The Installation must conform to local codes or,
in the absence of local codes, with the National
Fuel Gas Code, ANSI Z223.1/NFPA 54 - latest
edition (In Canada, the current CAN/CSA-B149.1
installation code).
The appliance, when installed, must be electrically grounded and wired in accordance with
local codes or, in the absence of local codes,
with the National Electrical Code, ANSI/NFPA
70 - latest edition, or the Canadian Electrical
Code, CSA C22.1 - latest edition.
Provide adequate clearances around air openings and adequate accessibility clearance for
service and proper operation. Never obstruct
the front or back openings of the appliance.
These appliances are designed to operate on
natural or propane gas only. The use of other
fuels or combination of fuels will degrade
the performance of this system and may be
dangerous.
These fireplaces are designed as supplemental
heaters; therefore, it is advisable to have an
alternate primary heat source when installed
in a dwelling.
These appliances must not be connected to a
chimney or flue serving a separate solid fuel
burning appliance.
These electronic models come standard with a
remotely-modulated gas valve; flame appearance and heat output cannot be controlled at the
gas valve. The BTU Input for these appliances
is shown in Table 1.
Input (BTU/HR) Gas Valves (all models)
Models
MPDP35 25,000 high
MPDP40 31,000 high
Table 1
Input Rate (BTU / HR)
Nat. Gas Prop. Gas
22,000 high
16,400 low
20,100 low
18,000 low
29,000 high
22,200 low
3
LENNOX HEARTH PRODUCTS • MERIT PLUS® DIRECT VENT GAS FIREPLACES (MPDP35/40) • INSTALLATION INSTRUCTIONS
Gas Pressure - All Models
Tables 2 and 3 show the appliances' inlet and
manifold gas pressure requirements:
Inlet Gas Supply Pressure
(all models)
Fuel # Minimum Maximum
Natural Gas
Propane
4.5" WC
(1.12 kPa)
11.0" WC
(2.74 kPa)
10.5" WC
(2.61 kPa)
13.0" WC
(3.23 kPa)
Table 2
Manifold Gas Supply Pressure
(all models)
Fuel # Low High
Natural
Gas
Propane
(Lo)
1.6" WC
(0.40 kPa)
(Lo)
6.3" WC
(1.57 kPa)
(Hi) 3.5" WC
(0.87 kPa)
(Hi) 10.0" WC
(2.49 kPa)
Table 3
Test gauge connections are provided on the
front of the electronic gas control valve (identified IN for the inlet and OUT for the manifold
side). The control valves have a 3/8" (10mm)
NPT thread inlet and outlet side of the valve
(refer to Figure 1).
Propane tanks are at pressures that will cause
damage to valve components. Verify that the
tanks have step down regulators to reduce the
pressure to safe levels.
The appliance and its appliance main gas
valve must be disconnected from the gas
supply piping system during any pressure
testing of that system at test pressures in
excess of 1/2 psi (3.5 kPa).
The appliance must be isolated from the
gas supply piping system by closing its
equipment shutoff valve during any pressure
testing of the gas supply piping system at
test pressures equal to or less than 1/2 psi
(3.5 kPa).
Orifice Sizes - Sea Level to High Altitude
(All Models)
Deration - At higher elevations, the amount
of BTU fuel value delivered must be reduced
by either:
• Using gas that has been derated by the gas
company.
• Changing the burner orifice to a smaller size
as regulated by the local authorities having
jurisdiction and by the (USA) National Fuel Gas
Code NFPA 54/ANSI Z223.1 - latest edition or,
in Canada, the CAN/CSA-B149.1 codes - latest
edition.
Flame breadth, height and width will diminish
4% for every 1,000 feet of altitude.
Burner Orifice Sizes
Elevation 0-4500 feet ( 0-1372 meters)
Model Nat.Gas
MPDP35
MPDP40
Table 4
drill size (inches)
#42 (.093")*
H3721•
#36 (.1065")*
18L40•
* Standard size installed at factory
• Part /Cat. Number
Propane
drill size (inches)
#54 (.055")*
99K79•
#52 (.063")*
21L01•
In Canada - CAN/CGA-2.17-M91 (R2009)
(high altitude):
THE CONVERSION SHALL BE CARRIED
OUT BY A MANUFACTURER’S AUTHORIZED REPRESENTATIVE, IN ACCORDANCE WITH THE REQUIREMENTS OF
THE MANUFACTURER, PROVINCIAL OR
TERRITORIAL AUTHORITIES HAVING
JURISDICTION AND IN ACCORDANCE
WITH THE REQUIREMENTS OF THE
CAN/CGA-B149.1 OR CAN/CGA-B149.2
INSTALLATION CODES.
Green Wire
(From DFC Wire
Harness)
Manifold (Out)
Test Port
Inlet (In) Test Port
REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS
These fireplaces are approved for installation in
the US state of Massachusetts if the following
additional requirements are met:
• Install this appliance in accordance with
Massachusetts Rules and Regulations 248
C.M.R.
• Installation and repair must be done by a
plumber or gas fitter licensed in the Commonwealth 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.
Massachusetts Horizontal Vent Requirements
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:
• A hard wired carbon monoxide detector
with an alarm and battery back-up must be
installed on the floor level where the gas
fireplace is installed. The carbon monoxide
detector must comply with NFPA 720, be
ANSI/UL 2034 listed and be ISA certified.
• A metal or plastic identification plate must
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.
Connect GTMS
Wire Harness
Pressure
Regulator
Tower
These appliances are tested and approved for
installation at elevations of 0-4500 feet (0-1372
meters) above sea level using the standard burner
orifice sizes (marked with an "*" in Table 4).
For elevations above 4500 feet, contact your
gas supplier or qualified service technician.
4
Orange Wire
(From DFC Wire
Harness)
Main Gas Inlet
3/8" NPT
Figure 1: SIT Proflame Valve
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Yellow Ground Wire
(From DFC Wire
Harness)
LENNOX HEARTH PRODUCTS • MERIT PLUS® DIRECT VENT GAS FIREPLACES (MPDP35/40) • INSTALLATION INSTRUCTIONS
COLD CLIMATE INSULATION
For cold climate installations, seal all cracks
around your appliance with noncombustible
material and wherever cold air could enter
the room. It is especially important to insulate
outside chase cavity between studs and under
floor on which appliance rests, if floor is above
ground level. Gas line holes and other openings should be caulked or stuffed with unfaced
fiberglass insulation.
If the fireplace is being installed on a cement
slab in cold climates, a sheet of plywood or
other raised platform can be placed underneath
to prevent conduction of cold transferring to
the fireplace and into the room. It also helps to
sheetrock inside surfaces and tape for maximum
air tightness and caulk firestops.
MANUFACTURED HOME
REQUIREMENTS
This appliance may be installed in an aftermarket permanently located, manufactured home
and must be installed in accordance with the
manufacturer's instructions.
Cet appareil peut être installé cómme du
matéri-el d'origine dans une maison préfabriquée (É.U. seulement) ou mobile et doit être
installé selon les instructions du fabricant.
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.
Cet appareil doit être utilisé uniquement
avec le type de gaz indiqué sur la plaque
signalétique. Cet appareil ne peut être converti à d'autres gaz, sauf si une trousse de
conversion est utilisée.
CAUTION: Ensure that the cross members are not cut or weakened during
installation. The structural integrity of
the manufactured home floor, wall, and
ceiling / roof must be maintained.
CAUTION: This appliance must be grounded to the chassis of the manufactured
home in accordance with local codes or
in the absence of local codes, with the
National Electrical Code ANSI / NFPA 70
- latest edition or the Canadian Electrical
Code CSA C22.1 - latest edition.
REAR VENT
APPLICA
TION
TOP VENT
APPLICA
APPLICATION
TOP VENT
INSTALLATION
VERTICAL VENT
(Rear Vent Application)
HORIZONTAL VENT
(Rear Vent Application with a chase)
RECESSED
REAR VENT
APPLICATION
TOP VENT
APPLICATION
TOP VENT
APPLICATION
HORIZONTAL VENT
(Rear Vent Application without a chase)
TION
TOP VENT
APPLICATION
TOP VENT
APPLICATION
HORIZONTAL VENT
(Top Vent Application)
Figure 2: Typical Locations
LOCATION
In selecting the location, the aesthetic and
functional use of the appliance are primary
concerns. However, vent system routing to
the exterior and access to the fuel supply are
also important.
Due to high temperatures, the appliance
should be located out of traffic and away from
furniture and draperies (Figure 2).
En raison des températures élevées,
l’appareil devrait être installé dans un
endroit où il y a peu de circulation et loin
du mobilier et des tentures (Figure 2).
The location should also be free of electrical,
plumbing or other heating/air conditioning
ducting.
These direct-vent appliances are uniquely
suited for installations requiring a utility shelf
positioned directly above the fireplace. Utility shelves like these are commonly used for
locating television sets and decorative plants.
VERTICAL VENT
(Top Vent Application)
Be aware that this is a heat producing appliance. Objects placed above the unit are
exposed to elevated temperatures.
Do not insulate the space between the appliance and the area above it (see Figure 7).
The minimum height from the base of the appliance to the underside of combustible materials
used to construct a utility shelf in this fashion
is shown in Figure 7.
The appliance must be mounted on a fully supported base extending the full width and depth of
the unit. The appliance may be located on or near
conventional construction materials. However,
if installed on combustible materials, such as
carpeting, vinyl tile or other combustible material
other than wood flooring, the appliance shall be
installed on a metal or wood panel extending the
full width and depth of the appliance.
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
5
LENNOX HEARTH PRODUCTS • MERIT PLUS® DIRECT VENT GAS FIREPLACES (MPDP35/40) • INSTALLATION INSTRUCTIONS
LOWEST DISCHARGE OPENING OF VENT
TERMINATION HEIGHTS FOR VENTS ABOVE
VENT TERMINATION CLEARANCES
These instructions should be used as a
guideline and do not supersede local codes
in any way. Install venting according to local
codes, these instructions, the current National
Fuel Gas Code (ANSI-Z223.1) in the USA or
the current standards of CAN/CSA-B149.1
in Canada.
Vertical Vent Termination Clearances
Terminate multiple vent terminations according to
the installation codes listed above and Figures
3 and 4.
12”
(305mm)
Minimum
Vertical Vent Termination Clearances
Horizontal Overhang
2 FT MIN.
Termination
Storm Collar
Flashing
Concentric
Vent Pipe
FLAT OR SLOPED ROOFS
Vent
*H = MINIMUM HEIGHT FROM ROOF TO
2 FT
MIN.
Lowest
Discharge
Opening
H*
1 inch (25.4 mm) Minimum
Clearance to Combustibles
Vertical
Wall
X
12
Roof Pitch is X/12
Figure 4
Horizontal Vent Termination Clearances
The vent / air intake termination clearances
above the high side of an angled roof are as
shown in the following chart:
Termination Heights For Vents
Above Flat Or Sloped Roofs
Ref. NFPA 54 / ANSI Z223.1
Roof Pitch *H (ft) *H (m)
Flat to 6/12 1.0 0.3
6/12 to 7/12 1.25 0.38
7/12 to 8/12 1.5 0.46
8/12 to 9/12 2.0 0.61
9/12 to 10/12 2.5 0.76
10/12 to 11/12 3.25 0.99
11/12 to 12/12 4.0 1.22
12/12 to 14/12 5.0 1.52
14/12 to 16/12 6.0 1.83
16/12 to 18/12 7.0 2.13
18/12 to 20/12 7.5 2.29
20/12 to 21/12 8.0 2.44
Figure 3: Multiple Terminations
The horizontal vent termination must have a minimum of 6" (152 mm) clearance to any overhead
combustible projection of 2-1/2" (64 mm) or less (Figure 5). For projections exceeding 2-1/2" (64
mm), see Figure 6. For additional vent location restrictions, refer to Figure 6 on Page 7.
Horizontal Vent Termination Clearances
Combustible Projection
inches or less in length
2-1/2
Combustible Projection greater
than 2-1/2 inches in length
Ventilated
Soffit
Unventilated
Soffit
18"
(457 mm)
12"
(305 mm)
6"
(152 mm)
All horizontal terminations
may be located as close as
6” (152mm) to any
(non-combustible and
combustible) exterior
sidewall. This distance
may be decreased to 2”
(51mm) for non-combustible exterior
sidewalls only, if the
SV4.5HT-2 termination
is used.
Termination Kit
Side Elevation View
Termination Kit
Note: See Figure 41 on Page 21 for exterior
Figure 5
wall recess allowances for square horizontal
termination.
6
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT PLUS® DIRECT VENT GAS FIREPLACES (MPDP35/40) • INSTALLATION INSTRUCTIONS
NOTE: Local Codes Or Regulations
*noitallatsnInaidanaC **noitallatsnISU
.ynoclabro,kced,hcrop,adnarev,edargevobaecnaraelC=A *)mc03(sehcni21 **)mc03(sehcni21
.denepoebyamtahtroodrowodniwotecnaraelC=B secnailpparof)mc51(sehcni6
)mc03(sehcni21,)Wk3(hutB000,01<
)Wk3(hutB000,01>secnailpparof
secnailpparof)mc51(sehcni6
)mc32(sehcni9,)Wk3(hutB000,01<
dna)Wk3(hutB000,01>secnailpparof
)mc03(sehcni21,)Wk51(hutB000,05<
**)Wk51(hutB000,05>secnailpparof
wodn
iwdesolcyltnenamrepotecnaraelC=C otdednemmocer)mm503(sehcni21
noitasnednocwodniwtneverp
otdednemmocer)mm922(sehcni9
noitasnednocwodniwtneverp
ehtevobadetacoltiffosdetalitnevotecnaraelclacitreV=D
)mm854(sehcni81foecnatsidlatnozirohanihtiwnoitanimret
)mm854(sehcni81 )mm854(sehcni81
tiffosdetalitnevnuotecnaraelC=E )mm503(sehcni21 )mm503(sehcni21
renrocedistuootecnaraelC=F muminim)mc7.21(sehcni5 muminim)mc7.21(sehcni5
renrocedisniotecnaraelC=G •2-TH5.4VS-muminim)mc80.5(sehcni2
SSTH5.4VS-muminim)mc2.51(sehcni6
•2-TH5.4VS-muminim)mc80.5(sehcni2
SSTH5.4VS-muminim)mc2.51(sehcni6
evobadednetxeenilretnecfoedisnihcaeotecnaraelC=H
ylbmessarotaluger/retem
teef51fothgiehanihtiw)mc19(teef3
*ylbmessarotaluger/retemehtevoba
teef51fothgiehanihtiw)mc19(teef3
**ylbmessarotaluger/retemehtevoba
teltuotnevrotalugerecivresotecnaraelC=I *)mc19
(teef3 **)mc19(teef3
rognidliubottelniylppusrialacinahcemnonotecnaraelC=J
ecnailpparehtoynaottelnirianoitsubmoceht
secnailpparof)mc51(sehcni6
)mc03(sehcni21,)Wk3(hutB000,01<
)Wk3(hutB000,01>secnailpparof
secnailpparof)mc51(sehcni6
)mc32(sehcni9,)Wk3(hutB000,01<
dna)Wk3(hutB000,01>secnailpparof
)mc03(sehcni21,)Wk51(hutB000,05<
**)Wk51(hutB000,05>secnailpparof
telniylppusrialacinahcemaotecnaraelC=K *)m38.1(teef6 )
m3(teef01nihtiwfievoba)mc19(teef3
**yllatnoziroh
detacolyaweviddevaproklawedisdevapevobaecnaraelC=L
ytreporpcilbupno
‡)m31.2(teef7 ‡)m31.2(teef7
ynoclabrokced,hcrop,adnarevrednuecnaraelC=M ‡*)mc03(sehcni21 ‡)mc03(sehcni21
)mumixaM(evoclAfohtpeD=N *)m38.1(teef6 **)m38.1(teef6
)evoclA(noitanimreTotecnaraelC=O *)mm2.51(sehcni6 **)mm2.51(sehcni6
)muminiM(evoclAfohtdiW=P *)mc19(teef3 *)mc19(teef3
)evoclA(evobAelbitsubmoCotec
naraelC=Q *)mm754(sehcni81 **)mm754(sehcni81
.edoCnoitallatsnIenaporPdnAsaGlanoitaN1.941B-ASCtnerrucehthtiwecnadroccanI*
.sedoCsaGleuFlanoitaN45APFN/1.322ZSISNAtnerucehthtiwecnadroccanI**
htobsevresdnasgnillewdylimafelgnisowtneewtebdetacolsihcihwyawevirddevaproklawedisaevobayltceridetanimrettonllahstnevA‡
.sgnillewd
.roolfehthtaenebsedis2muminimanonepoyllufsiynoclabrokced,hcrop,adnarevfidettimrepylnO‡*
.yl
nO2-TH5.4VSrofselbitsubmoC-noNotecnaraelChcni2•
EXTERIOR HORIZONTAL VENT TERMINATION CLEARANCE REQUIREMENTS
* See Item D in the Text Below.
Exterior Wall
*18”
Horizontal
Termination
Inside Corner
B
V
L
V
6”
Detail D
F
V
A
Ventilated Soffit
V
Fixed
Closed
Window
V
C
X
= Air Supply Inlet
C
C
C
V
Inside
Corner Detail
G
V
A
B
Operable
V
Window
B
B
= Vent Termination
May Require Different Clearances.
NOTE: Location Of The Vent Termination
Must Not Interfere With Access To The
Electrical Service.
= 9” in U.S.
1
= 12” in Canada
3 ft.
X
1
J
B
= Area where Termination is not Permitted
1
3 ft.
P
N
Q
H
M
V
I
N
O
V
D
E
V
X
K
Figure 6
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
7
LENNOX HEARTH PRODUCTS • MERIT PLUS® DIRECT VENT GAS FIREPLACES (MPDP35/40) • INSTALLATION INSTRUCTIONS
12 (305) MANTEL
10 (254) MANTEL
8 (203) MANTEL
6 (152) MANTEL
4 (102) MANTEL
6
(152)
16
(406)
14
(356)
12
(305)
2 (51) MANTEL
TOP OF
APPLIANCE
8
(203)
10
(254)
MANTEL CLEARANCES
Inches (mm)
NOTE: Hood shown.
MINIMUM CLEARANCES TO COMBUSTIBLES
Appliance And Vent Clearances
The appliance is approved with zero clearance to combustible materials
on all sides (as detailed in Table 5).
MINIMUM CLEARANCES* Inches (millimeters)
Back 1/2 (13)
0 (0) from Spacers Or Dimples
Sides 1/2 (13)
0 (0) from Spacers Or Dimples **
Top of Fireplace 4 (102)
Floor 0 (0)
From Bottom of Unit To Ceiling 64 (1626)
Vent 3 (76) Top* / 1 (25.4) Sides & Bottom
SERVICE CLEARANCES Feet (meters)
Front 3 feet (0.9 meters)
Table 5
*Note: 3 in. (75 mm) above any horizontal/inclined vent component.
**Note: See Page 9, Step 1 for clearance requirements to the nailing
flange located at each side of the unit and any screw heads adjacent to it.
Combustible Shelf Height - inches (millimeters)
Models
MPDP35
MPDP40
Do not insulate the
space between the
appliance and the area
above it.
Shelf Height
(see table)
Shelf Above Fireplace With Rear Venting
Figure 7:
Top Vent with 1-foot section
and one 90-degree elbow
®
Secure Vent
55-7/8 (1419) 57-5/8 (1464) 36-1/4 (921) 36-1/4 (921)
60-7/8 (1546) 62-5/8 (1591) 41-1/4 (1048) 41-1/4 (1048)
Secure Flex®Secure Vent Secure Flex
Shelf Height Minimum Clearances
Rear Vent
(straight out the back)
Do not insulate the
space between the appliance and the area
above it.
Shelf Height
(see table)
Shelf Above Fireplace With Top Venting
Min. 1 ft.
section
required.
Hearth Extension - A hearth extension is not required with this appliance.
If a hearth extension is used, do not block the lower control compartment
door. Any hearth extension used is for appearance only and does not
have to conform to standard hearth extension installation requirements.
Shelf Height - To provide for the lowest possible shelf surface, use the
alternate rear vent outlet, the venting attached to the top vent should be
routed in a way to minimize obstructions to the space above the appliance.
Do not insulate the space between the appliance and the area above
it (see Figure 7). The minimum height from the base of the appliance to
the underside of combustible materials used to construct a utility shelf in
this fashion is shown in Figure 7.
Wall Finishes / Surrounds / Mantels
Note: Combustible wall finish materials and/or surround materials must
not be allowed to encroach the area defined by the appliance front face
(black sheet metal). Never allow combustible materials to be positioned
in front of or overlapping the appliance face (see Figure 62 on Page 34).
Non-combustible materials, such as surrounds and other appliance trim,
may be installed on the appliance face with these exceptions: they must not
cover any portion of the removable glass panel or control compartment.
Vertical installation clearances to combustible mantels vary according
to the depth of the mantel. See Figure 8. Mantels constructed of noncombustible materials may be installed at any height above the appliance
opening; however, do not allow anything to hang below the fireplace hood.
Minimum clearance requirements include any projections such as shelves,
window sills, mantels, etc. above the appliance.
NOTE: We recommend the use of high temperature paint (rated 175° F
or higher) on the underside of the mantel.
8
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Inches (millimeters)
Figure 8: Minimum Mantel Clearances
At 6" minimum
side wall clearance,
a combustible wall
can project to any
Top View of
Fireplace
length.
o
45
3-1/2
Combustible Materials
Allowed In Shaded Area
(89)
“Safe Zone”
Combustible Walls
shown in dark gray
Combustible materials may
project beyond either side
of the fireplace opening
as long as they are kept
within the shaded area
illustrated here.
Inches (millimeters)
(152)
6
Figure 9: Minimum Distance to Side Wall
LENNOX HEARTH PRODUCTS • MERIT PLUS® DIRECT VENT GAS FIREPLACES (MPDP35/40) • INSTALLATION INSTRUCTIONS
Side
Framing
Unit Nailing Flange
(No clearance to
combustible framing
is required.)
Unit Secured to Framing
by Nailing Flange
Header Spacing Top Standoffs
(two pairs on front edge of firebox top)
Lift up outer pair for
1/2" finish materials.
Lift up inner pair for
5/8" finish materials.
Left Side Front Corner of Fireplace Shown
(Right side requirements are the same)
PRE-INSTALLATION STEPS
The appliance is shipped with all gas controls
and components installed and pre-wired.
Before installing the fireplace, follow these steps:
1. Remove the shipping carton.
2. Remove the shipping pad, exposing the front
glass door.
3. Open the two spring latches securing the
glass door (under the firebox floor). Remove
the door by tilting it outward at the bottom
and lifting it up. Set aside the door, taking
care to protect it from inadvertent damage
(see Removing and Installing the Glass Door
on Page 32).
4. Remove the log set and top vent flue
restrictor from the firebox. Handle logs
carefully to prevent breakage.
5. Remove the embers and volcanic stone from
the control compartment.
6. Remove top standoff and hood (taped to
back of outer wrapper).
7. Remove the 4 screws on top, and install the
top standoff with the 4 screws (Figure 10).
IMPORTANT!
Install top standoff
and bend up appropriate
drywall backstops (1/2" or 5/8")
before installing fireplace.
Top Standoff
(installed)
TYPICAL INSTALLATION SEQUENCE
The typical sequence of installation is outlined
below; however, each installation is unique and
may result in variations to the steps described.
See the pages referenced in the following steps
for detailed procedures.
Step 1. FRAMING (Page 9): Construct the ap-
pliance framing. Position the appliance within
the framing and secure with nailing brackets.
IMPORTANT! Before installing the fireplace,
install the top standoff on the top front edge
of the fireplace using the 4 existing screws
on the fireplace top (see Figure 10). Then,
bend up the applicable drywall backstops on
the top standoff (1/2" or 5/8"), based on the
thickness of the drywall/finish material to be
used (see Figure 10).
Bend out the appropriate side nailing flanges for
the drywall/finish material to be used. Nailing
flanges are provided for flush framing, 1/2-inch
and 5/8-inch framing depths (see Figure 11).
Step 2. ROUTING GAS LINE (Page 11): Route
gas supply line to appliance location.
Step 3. PREPARING APPLIANCE VENT COLLAR
(Page 12).
Step 4. INSTALLING VENT SYSTEM (Page 12):
Install the vent system and exterior termination.
Step 5. FIELD WIRING (Page 26): Field wire
and install operating control switch.
Step 6. REMOTE CONTROL SYSTEM (Page
27).
DETAILED INSTALLATION STEPS
Step 1. FRAMING
Frame the appliance as illustrated in Figures
12 and 13 on Pages 10 and 11 (Figure 13
applies to corner framing installations only).
All framing details must allow for a minimum
clearance to combustible framing members as
shown in Table 5 on Page 8.
If the appliance is to be elevated above floor level,
a solid continuous platform must be constructed
below the appliance.
Headers may be in direct contact with the appliance top standoff spacer, maintaining the 4"
clearance to the fireplace top, but must not be
supported by them or notched to fit around
them. All construction above the appliance
must be self-supporting. DO NOT use the ap-
pliance for structural support.
Secure the fireplace to the side framing members
using the unit’s nailing flanges — one top and
bottom on each side of the fireplace front. See
Figure 11. Use 8d nails or their equivalent.
Figure 10
Drywall Backstops
(bent up for 1/2"
or 5/8")
Step 7. CONNECTING GAS LINE (Page 28):
Make connection to gas supply.
Step 8. VERIFYING APPLIANCE OPERATION
(Page 28).
Step 9. INSTALL LOGS, VOLCANIC STONE,
AND GLOWING EMBERS (Page 29).
Step 10. INSTALLING GLASS DOOR ASSEMBLY (Page 32).
Step 11. BURNER ADJUSTMENTS (Page 32):
Adjust burner to ensure proper flame appearance.
Step 12. HOOD INSTALLATION (Page 34).
Step 13. ATTACHING SAFETY-IN-OPERATION
WARNINGS (Page 35).
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
NOTE: The nailing flanges, combustible
members, and screw heads in areas directly
adjacent to the nailing flanges are EXEMPT
from the 1/2" clearance to combustible
requirements for the firebox outer wrapper.
Combustible framing may be in direct contact
with the nailing flanges and may be located
closer than 1/2" from screw heads and the
firebox wrapper in areas adjacent to the
nailing flanges.
Frame the opening to the exact dimensions
specified in the framing details in this manual.
Figure 11
9
LENNOX HEARTH PRODUCTS • MERIT PLUS® DIRECT VENT GAS FIREPLACES (MPDP35/40) • INSTALLATION INSTRUCTIONS
FIREPLACE AND FRAMING SPECIFICATIONS
Framing
Model No. A B C D E
in. 35-1/4 36-1/4 21-11/16 49 16
MPDP35
mm 895 921 551 1245 406
in. 40-1/4 41-1/4 26-11/16 54 16
MPDP40
Diagrams, illustrations and photographs are not to scale. Consult installation
instructions. Product designs, materials, dimensions, specifications, colors,
and prices are subject to change or discontinuance without notice.
Fireplace
Model
(Rear Vent)
MPDP35 70 69 70 71
MPDP40 71 70 71 72
Based on CSA P.4.1-09
mm 1022 1048 678 1372 406
Notes
Efficiencies %
Natural Gas Propane
AFUE
EnerGuide
(P4)
Rear/Side
Framing
Spacers
Standoff
AFUE
Top
EnerGuide
(P4)
G
H
VENT FRAMING:
REAR VENT
with no elbows
B
Concentric Flue*:
Flue =
4-1/2" (114 mm);
Combustion Air =
(190 mm).
J
VENT FRAMING:
TOP VENT with
1 ft. of pipe and
90-degree elbow
A
1/2
7-1/2"
Framing should be
)
7
(178)
7
(178)
constructed of 2x4
or larger lumber.
12-1/8
(308)
12-1/8
(308)
10-1/2
(
267
5-1/8
(130)
5-1/8
D
(130)
C
E
A
Dimension “E” is required framing depth when
finish material (drywall) thickness is 1/2 in. (13mm).
Inches (mm)
10
Top View
E
Top Standoff
A
C
D
4" (102 mm)
Gas Inlet (either
side and bottom)
Optional Electrical Inlet
Knockout (either side;
B
requires field-provided
Eyebrow Hood
Front View
*All MPDP models have a top and rear vent.
N
6"(152 mm)
L
junction box)
1-3/8" (35 mm)
K
Right Side View
Model No. A B C D E F G H J K L M N
in. 36-1/8 32-1/8 19 29-1/2 35-1/8 21-11/16 24-7/8 12-7/16 9 3 9 3 16
MPDP35
mm 918 816 483 749 892 551 632 316 220 76 220 76 406
in. 41-1/8 37-1/8 24 34-1/2 40-1/8 26-11/16 29-7/8 14-15/16 9 3 9 3 16
MPDP40
mm 1045 943 610 876 1019 678 759 379 220 76 220 76 406
Figure 12
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
1/2" (13 mm)
Framing Spacer
F
1-5/8"
M
Electrical Inlet
Cover Plate
2" x 2-3/4"
(51 x 70 mm)
with Knockout
LENNOX HEARTH PRODUCTS • MERIT PLUS® DIRECT VENT GAS FIREPLACES (MPDP35/40) • INSTALLATION INSTRUCTIONS
FIREPLACE FRAMING SPECIFICATIONS
Model No. A B C D E F
MPDP35
MPDP40
Note:
• Rear Vent Applications in Corner Installations: The horizontal vent length
(from a to b) must not exceed 28 inches (711 mm).
• MPDP35 and MPDP40: Dimensions D through F apply when one 45-degree
elbow is connected directly to the appliance collar.
in. 35-1/8 57-1/2 40-5/8 19-3/16 28-3/4 6-1/8
mm 892 1461 1032 487 730 156
in. 40-1/8 61-3/16 43-11/32 19-3/16 30-11/16 7-7/8
mm 1019 1554 1101 487 779 200
Figure 13: Corner Framing with Horizontal Termination
Step 2. ROUTING GAS LINE
Route a 1/2" (13 mm) gas line to the left side
of the appliance as shown in Figure 14. Gas
lines must be routed, constructed and made
of materials that are in strict accordance with
local codes and regulations. All appliances
are factory-equipped with a flexible gas line
connector and 1/2-inch shutoff valve (see Step
7 on Page 28).
Never use galvanized or plastic pipe. Refer to
Table 6 for proper sizing of the gas supply line,
if black iron pipe is being used. Gas lines must
be routed, constructed and made of materials
that are in strict accordance with local codes
and regulations. We recommend that a qualified individual such as a plumber or gas fitter
be hired to correctly size and route the gas
supply line to the appliance. Installing a gas
supply line from the fuel supply to the appliance
involves numerous considerations of materials,
Left Side Front
Corner of Fireplace
Framing
protection, sizing, locations, controls, pressure,
sediment, and more. Certainly no one unfamiliar and unqualified should attempt sizing or
installing gas piping.
Pipe Coupling
(Recommended)
6-1/2"
(152 mm)
Inside Diameter (Inches)
Schedule 40 Pipe
3"
(76 mm)
Also see Figure 12.
Length (feet)
0-10 1/2 3/8
10-40 1/2 1/2
40-100 1/2 1/2
Figure 14: Route Gas Line
100-150 3/4 1/2
150-200 3/4 1/2
Proper Sizing of Gas Line
Table 6
Properly size and route the gas supply line
from the supply regulator to the area where the
appliance is to be installed per requirements
outlined in the National Fuel Gas Code, NFPA
54 - latest edition (USA) or CAN/CSA-B149.1
- latest edition (Canada).
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Schedule 40
Black Iron Pipe
Natural
Gas
b
Rear Vent
F
Top Vent
C
7"
(178 mm)
D
a
A
B
Back wall of chase/enclosure (including any finishing materials)
Notes:
• All appliances are factory-equipped with
a flexible gas line connector and 1/2 inch
shutoff valve (see Figure 52 on Page 28).
• See Massachusetts Requirements on Page
4 for additional requirements for installations
in the state of Massachusetts in the USA.
• The gas supply line should Not be connected
to the appliance until Step 7 on Page 28.
• A pipe joint compound rated for gas should be
used on the threaded joints. Ensure propane
resistant compounds are used in propane
applications. Be very careful that the pipe
compound does not get inside the pipe.
• It is recommended to install a sediment trap
in the supply line as close as possible to the
appliance.
Propane
Gas
• Check with local building official for local
code requirements (i.e. are below grade
penetrations of the gas line allowed?, etc).
IMPORTANT: If propane is used, be aware that
if tank size is too small (i.e. under 100-lbs, if
this is the only gas appliance in the dwelling.
Ref. NPFA 58), there may be loss of pressure,
resulting in insufficient fuel delivery (which
can result in sooting, severe delayed ignition
or other malfunctions). Any damage resulting
from an improper installation, such as this,
is not covered under the limited warranty.
E
11
LENNOX HEARTH PRODUCTS • MERIT PLUS® DIRECT VENT GAS FIREPLACES (MPDP35/40) • INSTALLATION INSTRUCTIONS
Step 3. PREPARING APPLIANCE VENT
COLLAR
The unit’s top and rear vent collars are each
sealed with a cover plate and gasket. The cover
plate and gasket must be removed from the applicable vent collar being used. Refer to Page 13
for rear vent applications and Page 14 for top
vent applications. Also refer to the following
steps to prepare the appropriate collar for use.
From the vent collar being used, remove the
four screws securing the cover plate and gasket.
Discard the cover plate and gasket. Reinstall all
four screws and tighten securely.
WARNING
Vent cover plate and vent seal cap
must remain securely installed
on unused vent collar. Failure
to reinstall and securely tighten
cover plate screws could result
in leakage of flue products into
the living space.
Step 4. INSTALLING VENT SYSTEM
These instructions should be used as a
guideline and do not supersede local codes
in any way. Install venting according to local
codes, these instructions, the current National
Fuel Gas Code (ANSI-Z223.1) in the USA or
the current standards of CAN/CSA-B149.1
in Canada.
Ensure clearances are in accordance with
local installation codes and the requirements
of the gas supplier.
Dégagement conforme aux codes d'installation locaux et aux exigences du foumisseunde gaz.
Use only approved vent components (see
Approved Vent Components on Page 2).
NOTE: These fireplaces must be vented
directly to the outside.
The vent system may not service multiple
appliances, and must never be connected to a
flue serving a separate solid fuel burning appliance. The vent pipe is tested to be run inside
an enclosed wall (such as a chase). There is
no requirement for inspection openings in the
enclosing wall at any of the joints in the vent pipe.
12
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Loading...