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Merit MLDVTCD-35NE-FB

Lennox Merit MLDVTCD-35NM, Merit MLDVTCD-35NM-FB, Merit MLDVTCD35NE-2, Merit MLDVTCD-35NE-FB Installation Instructions Manual

INSTALLATION INSTRUCTIONS
MLDVTCD Direct-Vent Gas Fireplaces
P/N 506015-09 Rev. A 04/2013
This manual is one of a set of two supporting this product. Refer to P/N 506017-08 for Care and Operation Instructions.
Ce manuel est disponible en francais, simplement en faire la demande. Numéro de la pièce 506223-60.
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
MLDVTCD-35NM MLDVTCD-35NM-FB
Report No. 100353019PRT-002
Please read and understand these instructions before starting installation.
ELECTRONIC:MILLIVOLT:
MLDVTCD35NE-2
MLDVTCD-35NE-FB
™
LENNOX HEARTH PRODUCTS • MERIT® SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS
TABLE OF CONTENTS
Packaging ............................ 2
Introduction .......................... 2
General Information .................... 2
Requirements for the Commonwealth
of Massachusetts ...................... 4
Cold Climate Insulation.................. 4
Manufactured Home Requirements ........ 5
Location ............................. 5
Vent Termination Clearances ............. 6
Minimum Clearance to Combustibles ....... 8
Pre-Installation Steps ................... 9
Typical Installation Sequence ............. 9
Detailed Installation Steps................ 9
Optional Blower Kit Wiring ............... 9
Framing.............................. 9
Fireplace and Framing Specifications ...... 10
Routing Gas Line ..................... 11
Installing the Venting System . . . . . . . . . . . . 12
Vertical Termination Systems ............ 12
Vent Section Length Chart .............. 13
Vertical Vent Tables and Figures .......... 16
Horizontal Termination System........... 18
Horizontal Vent Tables and Figures ........ 20
Venting Using Flexible Vent Pipe.......... 22
Field Wiring.......................... 23
Optional Blower Kit Wiring .............. 24
Connecting Gas Line................... 24
Verifying Appliance Operation............ 25
Installing Logs ....................... 26
Removing/Installing Glass Door .......... 28
Adjusting Burner...................... 28
Installing Hood ....................... 30
Finishing Requirements ................ 30
Attaching Safety-in-Operation Warnings.... 31
Installation Accessories ................ 32
Gas Conversion Kits ................... 34
Please read and understand these instructions before beginning your installation.
2
PACKAGING
The assembled vented gas fireplace heater is packaged with:
• Literature Kit (Envelope in bottom compartment containing Care and Operation Instructions, Installation Instructions, Safety-In-Operation Warning Labels, Warranty)
• (1) U-Shaped Vent Restrictor (Attached to Literature Kit envelope)
• (1) Hood (Inside firebox)
• One of the following contemporary floor media kits (sold separately):
• Tumbled River Stone
• Crushed Glass, Obsidian Black
• Crushed Glass, Diamond White
• Crushed Glass, Deep Sea Blue
• White Beach Sand
• Optional Contemporary facade kits
(sold separately)
INTRODUCTION
Millivolt appliances have a millivolt gas control valve with piezo ignition system. If any optional accessories that will require electrical power are to be installed, the electrical power must be provided at the time of appliance installation.
Electronic appliances are designed to operate on natural or propane gas. An electronic intermittent pilot ignition system provides safe, efficient operation. External electrical power is required to operate these units. In the event of a power outage, four (4) “AA” batteries (in battery holder) provide backup power for appliance operation (excluding [optional] blower).
These vented gas fireplace heaters are sealed combustion, air­circulating 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® Direct-Vent System Components manufactured by Security Chimneys International,
• Secure Flex® Flexible Vent Components manufactured by Security Chimneys International, and
• Z-FLEX® Model GA Venting Systems listed to UL1777 and ULCS635 manufactured by Flexmaster Canada Limited.
Use only the correct size venting (4 1/2 in. inner and 7 1/2 in. outer).
These approved vent system components are labeled for identification. DO NOT use any other manufacturer’s vent components with these appliances.
DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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.
NOTE: Children and adults should be alerted
to the hazards of high surface temperature and should stay away to avoid burns or clothing ignition.
Remarqué : 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® SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • 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.
Remarqué : 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.
NOTE: 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.
Remarqué : 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.
NOTE: Only trim kit(s) supplied by the manufacturer shall be used in the installation of this appliance.
Remarqué : Seules les trousses de garniture fournies par le fabricant doivent être utilisées pour l’installation de cet appareil.
DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Codes and Standards
These appliances comply with National Safety Standards and are tested and listed by ETL/Intertek. (Report No. 100353019PRT-002) to ANSI Z21.50 (in Canada, CSA 2.22), and CAN/ CGA-2.17-M91 in both USA and Canada, as vented gas fireplaces.
Both millivolt and electronic versions of these appliances may be used in bedrooms only when the room is an “unconfined space” as defined by the National Fuel Gas Code. Use in bedrooms may not be allowed by your local building codes. You should obtain prior approval from the Authority Having Jurisdiction prior to installation.
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 appliances are designed as decorative fireplaces. 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.
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.
Table 1: Input Rate, Gas Valves
Models
MLDVTCD-35
Input Rate (BTU/HR)
Natural Gas Propane Gas
14,500 high
11,500 low
13,500 high
10,500 low
3
LENNOX HEARTH PRODUCTS • MERIT® SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS
Gas Pressure
Table 2 and Table 3 show the appliance inlet and manifold gas pressure requirements.
Table 2: Inlet Gas Supply Pressure
Fuel Minimum Maximum
Natural Gas
Propane
4.5 in. WC (1.12 kPa)
11.0 in. WC (2.74 kPa)
Table 3: Manifold Gas Supply Pressure
Fuel Low High
Natural Gas
Propane
2.2 in. WC (0.55 kPa)
6.3 in. WC (1.57 kPa)
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 in. (10 mm) NPT thread inlet and outlet side of the valve (Figure 1 and Figure 2 ).
Figure 1: SIT Millivolt Gas Valve
Main Gas Control Knob
OFF/PILOT/ON
N
O
T
O
it
L
I
P
O
F
F
OUT
IN
Manifold Pressure Tap
Inlet Pressure Tap
W
O
H
I
Figure 2: SIT Electronic Gas Valve
Green Wire
Inlet (IN) Test Port Manifold (OUT)
Test Port
Orange Wire
(from DFC
Wire
Harness)
Main
Gas Inlet
3/8 in. NPT
(from DFC Wire
Propane tanks are at pressures that will cause damage to valve components. Verify that the tanks have step down regulators to
4
reduce the pressure to safe levels.
10.5 in. WC (2.61 kPa)
13.0 in. WC (3.23 kPa)
3.5 in. WC (0.87 kPa)
10.0 in. WC (2.49 kPa)
Pilot Adjustment
Screw
T
O
L
I
P
L
HI/LO Variable
Flame Height
Adjustment
Hi/Lo Flame
Harness)
Yellow Ground Wire (from DFC Wire Harness)
Control Knob
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
These appliances are tested and approved for installation at elevations of 0–4500 ft (0–1372 m) above sea level using the standard burner orifice sizes (marked with an “*” in Table 4).
For elevations above 4500 ft, contact your gas supplier or qualified service technician.
Deration
At higher elevations, the amount of BTU fuel value delivered must be reduced by either:
• Using gas that has been derated by the gas company.
• 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
HTPTHTPT
54/ANSI Z223.1—latest edition or, in Canada, the CAN/CSA-B149.1 codes— latest edition.
NOTE: Flame breadth, height and width will diminish 4% for every 1,000 feet of altitude.
Table 4: Burner Orifice Sizes, Elevation 0–4500 ft ( 0–1372 m)
Model
MLDVTCD-35
* Standard size installed at factory
• Catalog number
Natural Gas
drill size
(inches)
#49 (0.073 in.)*
21L82•
(0.045 in.)*
In Canada—CAN/CGA-2.17-M91 (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.
REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS
These fireplaces are approved for installation in the U.S. state of
DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Propane drill size (inches)
75L10•
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 in. (92 cm) in length.
• The individual manual shut-off must be a T-handle type valve.
Massachusetts Horizontal Vent Requirements
In the Commonwealth of Massachusetts, horizontal 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.
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.
LENNOX HEARTH PRODUCTS • MERIT® SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS
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.
LOCATION
In selecting the location, the aesthetic and functional use of the appliance are primary concerns. However, vent system routing to the exterior and access to the fuel supply are also important.
Due to high temperatures, the appliance should be located out of traffic and away from furniture and draperies (Figure 3).
En raison des températures élevées, l’appareil devrait être installé dans un endroit où il y a peu de circulation et loin du mobilier et des tentures (Figure 3).
Figure 3: Typical Locations
TNEVPOT
NOITACILPPA
NOITACILPPA
TNEVPOT
NOITACILPPA
TNEVPOT
APPLICATION
TOP VENT
RECESSED
INSTALLATION
NOITACILPPA
TNEVPOT
TOP VENT
APPLICATION
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 Table 8.
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: When the unit is installed with one side flush with a wall, the wall on the other side of the unit must not extend beyond the front edge of the unit.
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.
HORIZONTAL VENT
(Top Vent Application)
VERTICAL VENT
(Top Vent Application)
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.
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 (Table 8).
DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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LENNOX HEARTH PRODUCTS • MERIT® SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS
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, Figure 4, Figure 5, and Table 5.
Figure 4: Multiple Terminations
12 in.
(305 mm)
Minimum
Figure 5: Vertical Vent Termination
Clearances
TERMINATION HEIGHTS FOR VENTS ABOVE
Horizontal Overhang
2 FT MIN.
Termination
Storm Collar
Flashing
Concentric
Vent Pipe
FLAT OR SLOPED ROOFS
Vent
*H = MINIMUM HEIGHT FROM ROOF TO LOWEST DISCHARGE OPENING OF VENT
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
Table 5: Termination Heights for Vents above Flat or Sloped Roofs
Roof Pitch Feet * Meters *
Flat to 6 1/2 1 0.3
6 1/2 to 7 1/2 1 1/4 0.38
7 1/2 to 8 1/2 1 1/2 0.46
8 1/2 to 9 1/2 2 0.61
9 1/2 to 10 1/2 2 1/2 0.76 10 1/2 to 11 1/2 3 1/4 0.99 11 1/2 to 12 1/2 4 1.22 12 1/2 to 14 1/2 5 1.52 14 1/2 to 16 1/2 6 1.83 16 1/2 to 18 1/2 7 2.13
18 1/2 to 201/2 7 1/2 2.29
20 1/2 to 21 1/2 8 2.44
Horizontal Vent Termination Clearances
The horizontal vent termination must have a minimum of 6 in. (152 mm) clearance to any overhead combustible projection of 2 1/2 in. (64 mm) or less. For projections exceeding 2 1/2 in. (64 mm), see Figure 7. For additional vent location restrictions, refer to Table 6.
Figure 6: Horizontal Vent Termination
Clearances, Side Elevation
Combustible Projection
2-1/2
inches or less in length
Combustible Projection greater
than 2-1/2 inches in length
Ventilated
Soffit
Unventilated
Soffit
6"
18"
(457 mm)
12"
(305 mm)
Figure 7: Horizontal Vent Termination
Clearances
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.
(152 mm)
Termination Kit
Termination Kit
6
DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT® SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS
Table 6: Exterior Horizontal Vent Termination Clearances
NOTE: Local Codes Or Regulations
See Item D in the Text Below.
*
V
L
Horizontal Termination
B
Exterior Wall
*18 in.
V
Inside Corner
6 in.
Ventilated Soffit
Detail D
V
F
V
A
X
= Air Supply Inlet
Fixed
Closed
C
C
C
V
= Vent Termination
V
Window
C
A
B
V
B
Inside
Corner Detail
G
V
Operable
Window
B
B
= Area where Termination is not Permitted
U.S. Installation ** Canadian Installation *
Clearance above grade, veranda, porch, desk, or balcony 12 in. (300 mm) ** 12 in. (300 mm) *
A
Clearance to window or door that may be opened 6 in. (150 mm)
B
for appliances < 10,000 Btuh (3 kW), 9 in. (230 mm)
for appliances > 10,000 Btuh (3 kW), and < 50,000 Btuh (15 kW), 12 in. (300 mm)
for appliances > 50,000 Btuh (15 kW) **
Clearance to permanently closed window 9 in. (229 mm)
C
Vertical clearance to ventilated soffit located above the
D
termination within a horizontal distance of 18 in. (458 mm) Clearance to unventilated soffit 12 in. (305 mm) 12 in. (305 mm)
E
Clearance to outside corner 5 in. (127 mm)
F
Clearance to inside corner 2 in. (50.8 mm)
G
recommended to prevent window condensation
18 in. (458 mm) 18 in. (458 mm)
minimum
minimum—SV4.5HT-2 •
6 in. (152 mm) minimum—SV4.5HTSS
Clearance to each inside of center line extended above
H
meter / regulator assembly
Clearance to service regulator vent outlet 36 in. (910 mm)** 36 in. (910 mm)*
I
Clearance to nonmechanical air supply inlet to building or
J
the combustion air inlet to any other appliance
36 in. (910 mm) within a height of 15 ft above the meter / regulator assembly **
6 in. (150 mm) for appliances < 10,000 Btuh (3 kW),
9 in. (230 mm) for appliances > 10,000 Btuh (3 kW) and < 50,000 Btuh (15 kW),
12 in. (300 mm) for appliances > 50,000 Btuh (15 kW)**
Clearance to a mechanical air supply inlet 36 in. (910 mm) above if within 10 ft (3 m) horizontally ** 72 in. (1830 mm) *
K
Clearance above paved sidewalk or paved diveway located
L
on public property Clearance under veranda, porch, deck or balcony 12 in. (300 mm) *‡ 12 in. (300 mm) *‡
M
Depth of alcove (maximum) 72 in. (1830 mm) ** 72 in. (1830 mm) *
N
Clearance to termination (alcove) 6 in. (15.2 mm) ** 6 in. (15.2 mm)*
O
Width of alcove (minimum) 36 in. (910 mm) ** 36 in. (910 mm) *
P
Clearance to combustible above (alcove) 18 in. (457 mm) ** 18 in. (457 mm) *
Q
*
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
‡
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 two sides beneath the floor
•
2 in. clearance to non-combustibles for SV4.5HT-2 only
84 in. (2130 mm) ‡ 84 in. (2130 mm) ‡
May Require Different Clearances.
NOTE: Location Of The Vent Termination Must Not Interfere With Access To The Electrical Service.
= 9 in. in U.S.
1
= 12 in. in Canada
3 ft
X
1
1
3 ft
J
N
H
M
I
6 in. (150 mm) for appliances < 10,000 Btuh (3 kW),
12 in. (300 mm) for appliances > 10,000 Btuh (3 kW)
12 in. (305 mm) recommended to prevent window condensation
5 in. (127 mm) minimum
2 in. (50.8 mm)
minimum—SV4.5HT-2 •
6 in. (152 mm) minimum—SV4.5HTSS
36 in. (910 mm) within a height of 15 ft above the meter / regulator assembly *
6 in. (150 mm) for appliances < 10,000 Btuh (3 kW),
12 in. (300 mm) for appliances > 10,000 Btuh (3 kW)
P
N
O
V
Q
D
E
V
V
X
K
7
LENNOX HEARTH PRODUCTS • MERIT® SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS
mantel legs may
MINIMUM CLEARANCE TO COMBUSTIBLES
The appliance is approved with zero clearance to combustible materials on all sides (Table 7), with the following exception: When the unit is installed with one side flush with a wall, the wall on the other side of the unit must not extend beyond the front edge of the unit. In addition, when the unit is recessed, the side walls surrounding the unit must not extend beyond the front edge of the unit (Figure 3).
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 (Table 8). The minimum height from the base of the appliance to the underside of combustible materials used to construct a utility shelf in this fashion is shown in Table 8.
The appliance should be mounted on a fully supported base extending the full width and depth of the unit. The appliance may be located on or near conventional construction materials. However, if installed on combustible materials, such as carpeting, vinyl tile, etc., a metal or wood barrier covering the entire bottom surface must be used.
Table 7: Minimum Clearances *
Back
Sides
Top of
Fireplace
Floor From
Bottom
of Unit To
Ceiling
Vent
Front
Service
* Note: 3 in. (75 mm) above any horizontal/ inclined vent component.
** Note: See Frame the Fireplace on Page 9 for clearance requirements to the nailing flange located at each side of the unit and any screw heads adjacent to it.
0 in. (0 mm) from Spacers or Dimples
0 in. (0 mm) from Spacers or Dimples **
0 in. (0 mm) with standoff(s) in vertical
1 in. (25.4 mm)—Sides and Bottom
1/2 in. (13 mm)
1/2 in. (13 mm)
3 in. (76 mm)
position (Figure 10)
0 in. (0 mm)
minimum of 64 in. (1626 mm)
3 in. (76 mm)—Top *
36 in. (914 mm)
Table 8: Shelf Height Minimum Clearances
Do not insulate the space between the
appliance and the
area above it.
Shelf Height
(see table)
Model
MLDVTCD-35 46 1/2 in. (1181 mm) 48 1/4 in. (1226 mm)
Secure Vent Secure Flex
Wall Finishes, Surrounds, and 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 (Figure 35 on Page 30).
Non-combustible materials, such as surrounds and other appliance trim, may be installed on the appliance face, but 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 (Figure 8). Mantels constructed of non-combustible materials may be installed at any height above the appliance opening. However, do not allow anything to hang below the fireplace hood.
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.
Top Vent—with One 90° Elbow
Figure 8: Minimum Mantel Clearances
Mantel
(305)
Depth
inches (millimeters)
Header
6
12
8
10
(203)
(254)
(152)
(102)
2
4
(51)
Top of
Appliance
Hood
18 (457)
16 (406)
14 (356)
12 (305)
10 (254)
8 (203)
Figure 9: Minimum Distance to
Side Wall
At 6 in. minimum side wall clearance, a combustible wall can project to any length.
o
45
6 in.
(152 mm)
3 1/2 in.
(89 mm)
Top View of
Fireplace
Combustible Materials Allowed In Shaded Area “Safe Zone”
Combustible Walls shown in dark gray
Combustible project beyond either side of the fireplace opening as long as they are kept within the shaded area illustrated here.
8
DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT® SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS
PRE-INSTALLATION STEPS
The appliance is shipped with all gas controls and components installed and pre­wired. Before installing the appliance, follow these steps:
1. Remove the shipping carton.
2. Remove the shipping pad, exposing the
front glass door.
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.
1. Wire the [Optional] Blower Kit Before Installation in the Framing
2. Frame the Fireplace
3. Route the Gas Line
4. Install the Vent System
5. Field Wiring
6. Wire the [Optional] Blower Kit After Installation in the Framing
7. Connect the Gas Line
8. Verify Proper Appliance Operation
9. Install the Contemporary Media
10. Install the Glass Door
11. Adjust the Burner
12. Install the Hood
13. Attach the Safety-in­Operation Warnings
DETAILED INSTALLATION STEPS
Follow these steps to complete fireplace installation:
Wire the [Optional] Blower Kit Before Installation in the Framing
Remove the left side blower cover panel screw, and blower cover panel (Table 11). Retain the panel and screw for later reinstallation.
Slide the blower through the opening and position it with the bracket oriented to the front of the firebox and the blower discharge to the rear of the firebox. Bend the two tabs in the firebox floor to secure the blower to the floor.
Reinstall the blower cover panel and secure with the removed screw.
Access the blower supply wiring through the front of the firebox and plug it into the junction box in the right, rear of the firebox (Figure 28).
Install the blower control switch according to its included instructions.
Frame the Fireplace
Frame the appliance as illustrated in Table 9 on Page 10. For corner framing installations, use Table 10 on Page 10. All framing details must allow for a minimum clearance to combustible framing members as shown in Table 7 on Page 8.
If the appliance is to be elevated above floor level, a solid continuous platform must be constructed below the appliance.
Bend up the outer pair for 1/2 in. materials and the inner pair for 5/8 in. materials.
Headers may be in direct contact with the appliance top standoff spacers when they are bent up vertically, maintaining the 3 in. 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 appliance for structural support.
Bend out the appropriate nailing flanges for the drywall/finish material to be used (Figure 10). Nailing flanges are provided for:
• flush framing,
• 1/2 in., and
• 5/8 in. framing depths.
DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
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 (Figure 10). Use 8d nails or their equivalent.
9
LENNOX HEARTH PRODUCTS • MERIT® SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS
Framing should be constructed
Inches (mm)
Table 9: Fireplace Framing Specifications
Model
MLDVTCD-35
Based on CSA P.4.1-09
mm 895 895 984 406
Note: Diagrams, illustrations and photographs are not to scale. Consult installation
instructions. Product designs, materials, dimensions, specifications, colors, and prices are subject to change or discontinuation without notice.
A B C D
in. 35 1/4 35 1/4 38 3/4 16
VENT FRAMING­TOP VENT WITH ONE 90° ELBOW
B
1/2
of 2x4 or larger lumber
10-1/2
)
267
(
7
(178)
5-1/8 (130)
12-1/8
(308)
C
D
A
Add Minimum Of 6 in. For Raised Platform If Installing With Contemporary Facade.
Table 10: Fireplace Framing Specifications—Corner Installation with Horizontal Termination
Model
MLDVTCD-35
A B C D E
in. 35 1/4 57 1/2 40 5/8 28 3/4 13 3/4
mm 895 1461 1032 730 349
Back wall of chase/enclosure
(including any finishing materials)
A
Raised Platform Or Floor
D is the required framing depth dimension when the
finish material (drywall) thickness is 1/2 in. (13mm)
E
7 (178)
C
D
A
B
Inches
(millimeters)
10
DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
LENNOX HEARTH PRODUCTS • MERIT® SERIES DIRECT-VENT GAS FIREPLACES • MLDVTCD-35 • INSTALLATION INSTRUCTIONS
Header Spacing Top Standoffs
(two pairs on front edge of firebox top)
Table 11: Fireplace Specifications
K
L
1/2 (13)
Top View
Model E F G H J K L M
MLDVTCD-35
*CONCENTRIC FLUE
FLUE: 4 1/2 (114) COMBUSTION AIR:
7 1/2 (190)
9 1/4 (235)
in. 32 1/4 28 1/8 23 1/4 32 35 1/4 25 12 1/2 33
mm 819 714 590 813 895 635 317 838
NOTE: It is recommended that the gas be stubbed in from the left side only.
ELECTRICAL INLET KNOCKOUT - 2-3/4 X 2
J
E
Front View
G
H
M
(70 X 51) COVER PLATE (With KNOCKOUT ­Right Side Only)
GAS INLET
KNOCKOUT
(Either Side)
F
INLET KNOCKOUT,
REQUIRING A FIELD
JUNCTION BOX
OPTIONAL
ELECTRICAL
PROVIDED
(Either Side)
3 (76)
EYEBROW HOOD
16 (406)
5 7/8 (149)
Right Side View
9 1/2 (241)
1 5/8
3 (76)
(42)
5.125
(130.2)
0.5 (12.7)
BLOWER ACCESS PANEL
0.525 (13.3)
Left Side View
Table 12: Thermal Efficiency (%)
Model
MLDVTCD-35 — 48 — 51
Natural Gas Propane
AFUE P4 AFUE P4
Figure 10: Unit Secured to Framing by
Nailing Flange
NOTE: Bend up the appropriate header spacing top standoffs before installing the fireplace.
Lift up outer pair for 1/2 in. finish materials
Side
Framing
Lift up inner pair for 5/8 in. finish materials
Unit Nailing
(No clearance to
combustible framing
is required)
Flange
NOTE: The nailing flanges, combustible members, and screw heads in areas directly adjacent to the nailing flanges are EXEMPT from the 1/2 in. (13 mm) 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 in. (13 mm) 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.
Vertical Venting through the Ceiling
Use a plumb line from the ceiling above the appliance to locate center of the vertical run. Cut and/or frame an opening, 10 1/2 x 10 1/2 in. (267 x 267 mm) inside dimensions, about this center mark (Figure 14).
Route the Gas Line
Route a 1/2 in. (13 mm) gas line to the left side of the appliance as shown in Figure 11. Gas lines must be routed, constructed, and made of materials that are in strict accordance with local codes and regulations. All appliances are factory­equipped with a flexible gas line connector and 1/2 in. shutoff valve. (see Connect the
Gas Line on Page 24).
Figure 11: Route the Gas Line
Left Side Front
Corner of Fireplace
Framing
Pipe Coupling
(Recommended)
6-1/2"
(152 mm)
3"
(76 mm)
Also see Table 11.
Properly size and route the gas supply line from the supply regulator to the area where the appliance is to be installed per requirements outlined in the National Fuel Gas Code, NFPA 54—latest edition (USA) or CAN/CSA-B149.1—latest edition (Canada).
Never use galvanized or plastic pipe. Refer to Table 13 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, protection, sizing, locations, controls, pressure, sediment, and more. Certainly no one unfamiliar and unqualified should attempt sizing or installing gas piping.
DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
11
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