Lennox Montebello MDLX40IN, Montebello MDLX45IP, Montebello MDLX40IP, Montebello MDLX45IN Installation Instructions Manual

Page 1

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.

Montebello® DLX Direct Vent Gas Fireplaces

Intertek Report No.

100513650

P/N 506023-15 Rev. B 04/2013

This manual is one of a set of two supporting this product. Refer to P/N 506025-07 for Care and Operation Instructions.

Ce manuel est disponible en francais, simplement en faire la demande. Numéro de la pièce 506223-41.

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

MDLX40IN MDLX40IP

Decorative Product: Not for use as a heating appliance.

NOTICE: Fireplace is not to be operated by a thermostat.

ELECTRONIC

MDLX45IN MDLX45IP

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LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

TABLE OF CONTENTS

Packaging ......................... 2

Introduction ........................ 2

General Information .................. 3

Massachusetts Requirements .......... 4

Cold Climate Insulation ............... 5

Manufactured Home Requirements ...... 5

Location . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Vent Termination Clearances ........... 6

Minimum Clearances to Combustibles ..... 8

Detailed Installation Steps ............. 9

Typical Installation Sequence .......... 9

Step 1. Framing .................... 9

Fireplace and Framing Speciﬁcations ...... 10

Step 2. Routing Gas Line ............. 11

Proper Sizing of Gas Line .............. 11

Step 3. Install the Vent System ........ 12

Vertical Termination Systems ........... 13

Vent Section Length Chart ............. 13

Vertical Vent Tables and Figures ......... 16

Horizontal Termination System ......... 17

Horizontal Vent Tables and Figures ...... 19

Step 4. Field Wiring ................. 21

Step 5. Removing Glass Door

Frame Assembly .................. 23

Step 6. Connecting Gas Line .......... 23

Step 7. Checking Appliance

Operation ........................ 23

Step 8. Installing Logs and Panels ...... 24

Step 9. Installing Glass Door .......... 26

Step 10. Burner Adjustments ........... 26

Finishing Requirements ............... 28

Step 11. Attaching Safety-in-

Operation Warnings ................ 29

Installation Accessories ............... 30

Gas Conversion Kits .................. 31

Please read and understand these instructions before beginning your

installation.

PACKAGING

The assembled ﬁreplace is packaged with the following:

• Literature Kit (plastic bag shipped inside

rebox), containing Care and Operation

Instructions, Installation Instructions (this

manual), Safety-in-Operation Warning Labels, and Warranty.

• One (1) bag Glowing Embers

• One (1) bag Platinum Embers

• One (1) bag Volcanic Stone

• Pull Screen Kit

• Remote Control and Wall Receiver Switch

Kit

• Door Modesty Shield

• Log Grate

NOTE: For use with ﬁreplace as shipped from fac-

tory only. Not for use with Contemporary Burner/ Floor Kit.

REQUIRED ACCESSORIES

The following accessories are required:

• One of the following Firebox Liner Kits:

a. Ceramic Firebox Liner Kit - Buff Rustic b. Ceramic Firebox Liner Kit - Red Rustic c. Porcelain Firebox Liner Kit - Black d. Ceramic Firebox Liner Kit - Red Her-

ringbone

e. Ceramic Firebox Liner Kit - Buff Her-

ringbone

NOTE: Porcelain kits include side and back panels.

Optional for use with log sets. Required when using the contemporary burner/ﬂoor kit.

• One of the following Floor Options: a. Oak Log Set (For use with ﬁreplace as

shipped from factory only. Not for use with contemporary burner/ﬂoor kit.)

b. Contemporary Burner/Floor Kit

Contemporary Burner/Floor Kit requires

one of the following Media Kits:

i. Crushed Glass - Reective Black

ii. Crushed Glass - Platinum

iii. Crushed Glass - Reective Blue

iv. Crushed Glass - Goldﬁnger v. Crushed Glass - Copper

NOTE

: The Contemporary Burner/Floor Kit instal-

lation and operation instructions are provided with the kit, and are not detailed in this manual.

INTRODUCTION

The Montebello® DLX direct-vent, sealedcombustion gas ﬁreplaces operate on natural or propane gas. These appliances feature a remotely controlled electronic intermittent pilot ignition system (manual adjustment of the gas

valve settings is not possible). The Montebello DLX is a decorative replace

and may not be installed and operated as the primary heat source in a dwelling.

Electrical power (120 VAC line voltage) is rec- ommended to operate the ﬁreplace; however,

four (4) "AA" batteries can be used for full-time

operation or as a backup in case of a power outage.

Approved Vent Components

These ﬁreplaces are designed, tested, and listed for operation and installation with Secure

Vent® direct vent system components (8" inner,

11" outer) manufactured by Security Chimneys

International.

These approved vent system components are labeled for identiﬁcation. USE ONLY AP-

PROVED VENT COMPONENTS. Do NOT use any other manufacturer’s vent components with these appliances.

Codes and Standards

These appliances comply with National Safety Standards and are tested and listed by Intertek

(Report No. 100513650) to Z21.50 (in Canada, CSA-2.22), and CAN/CGA-2.17-M91 in both

USA and Canada, as vented gas ﬁreplaces.

These appliances are listed by Intertek for installation in bedrooms and mobile homes.

Installation must conform to local codes. In the absence of local codes, installation must comply with the current National Fuel Gas

Code, ANSI Z223.1 (in Canada, the current CAN/CGA-B149.1 installation code).

The appliance, when installed, must be electrically grounded 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).

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LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

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.

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.

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.

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 this appliance if any part has been under water. Immediately call a qualiﬁed 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 se servir de cet appareil s'il a été plongé dans l'eau, complètement ou en partie. Appeler un technicien qualiﬁé pour inspecter l'appareil et remplacer toute partie du système de contrôle et toute commande qui ont été plongés 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.

Provide adequate clearances around air openings and adequate accessibility clearance for

service and proper operation. Never obstruct the front 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 must not be connected to a chimney or ﬂue serving a separate solid fuel burning appliance.

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LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

These electronic appliances are remotely controlled and feature an electronic intermittent pilot ignition system or standing pilot.

External electrical power is required to operate

these units.

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)

Model No. Input (BTU/Hr)

Natural Gas

MDLX40IN 32,000 to 50,000 MDLX45IN 38,500 to 60,000

Propane Gas

MDLX40IP 32,000 to 50,000 MDLX45IP 38,500 to 60,000

Table 1

Gas Pressure - All Models

Appliance inlet and manifold gas pressure requirements are listed in Tables 2 and 3.

Inlet Gas Supply Pressure

Fuel # Minimum Maximum

Natural

Gas

Propane

5.5" WC

(1.37 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

Fuel # Low High

Natural

Gas

Propane

1.6" WC (.4 kPa)

6.3" WC

(1.57 kPa)

3.5" WC

(.87 kPa)

10.0" WC

(2.49 kPa)

Table 3

Oriﬁce Sizes - Sea Level To High Altitude (All Models)

These appliances are tested and approved

for installation at elevations of 0 - 4500 feet (0 - 1372 meters) above sea level, using the

standard burner oriﬁce sizes (marked with an

asterisk (*) in Table 4). For elevations above 4500 feet, contact your gas supplier or qualied

service technician. Deration - At higher elevations, the amount

of BTU fuel value delivered must be reduced

by either:

• using gas that has been derated by the gas

company; or

• changing the burner orice 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/CGA-B149.1

codes - latest edition.

Install the appliance according to the regulations of the local authorities having jurisdiction and, in the USA, the National Fuel Gas Code NFPA

54 / ANSI Z223.1 - latest edition or , in Canada, the CAN/CGA-B149.1- latest edition.

NOTE: Flame appearance will diminish 4% per thousand feet of altitude.

Burner Oriﬁce Sizes

Elevation 0 - 4500 ft ( 0 - 1372 m)

Model Nat.Gas

drill size (inches)

MDLX40 0.1405" (#28)*

• H2286

MDLX45 0.154" (#23)*

• H8808

Table 4

* Standard size installed at factory

• Part /Cat. Number

Propane

drill size (inches)

0.086" (#44)*

• H2287

0.093" (#42)*

• H4816

Gas Valve Diagram

The SIT Proﬂame gas valve is shown in Figure

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 Com-

monwealth of Massachusetts.

• The exible gas line connector used shall not exceed 36 inches (92 centimeters) in

length.

• The individual manual shut-off must be a

T-handle type valve.

Massachusetts Horizontal Vent Requirements

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 certied.

• A metal or plastic identication 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.

Test gauge connections are provided on the front of the gas control valve (identiﬁed IN for

the inlet and OUT for the manifold side).

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).

Green Wire

(From DFC Wire

Harness)

Manifold (Out)

Test Port

Inlet (In) Test Port

Wire

(From DFC Wire

Harness)

Main Gas Inlet

3/8" NPT

Figure 1 - SIT Proﬂame Valve

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Connect GTMS Wire Harness

Pressure Regulator Tower

Yellow Ground Wire (From DFC Wire Harness)

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LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Drywall

Top Of Fireplace Opening

Non-Combustible

HORIZONTAL VENT

VERTICAL VENT

HORIZONTAL VENT

VERTICAL VENT

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 cold transfer 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 manu-

facturer's instructions and the Manufactured

Home Construction and Safety Standard, Title

24 CFR, Part 3280, in the United States, or the Standard for Installation in Mobile Homes, CAN/ CSA Z240 MH Series, in Canada.

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 et conformément à la norme

Manufactured Home Constructions and Safety, Title 24 CFR, Part 3200 aux Unis ou à la norme Can/CSA-Z240 Série MM, Maisons mobiles au Canada.

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 con-

verti 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.

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.

Figure 2 - Typical Installation

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.

Cross Corner

Application

Room Divider

Application

Recessed

Application

Island

Application

Flat

Application

Flat on Wall

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 on Page 8).

The minimum height from the base of the appliance to the underside of combustible materials used to construct a utility shelf in this fashion is shown in Figure 7 on Page 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.

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.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 6

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

(76 mm)

Termination Kit

Combustible Projection

greater than 2-1/2” in length

Horizontal Vent Termination Clearances

Combustible Projection 2-1/2” or less in length

24"

(610 mm)

Ventilated Or

Unventilated Soffit

Roof Pitch is X/12

2 FT MIN.

Lowest

Discharge

Opening

*H = MINIMUM HEIGHT FROM ROOF TO LOWEST DISCHARGE OPENING OF VENT

TERMINATION HEIGHTS FOR VENTS ABOVE

FLAT OR SLOPED ROOFS

Horizontal Overhang

Vertical

Wall

Vent

Termination

Storm Collar

Concentric

Vent Pipe

Flashing

1” (25.4 mm) Minimum Clearance to Combustibles

VENT TERMINATION CLEARANCES

These instructions should be used as a guideline 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 in Canada.

Vertical Vent Termination Clearances

Terminate multiple vent terminations according to the installation codes listed above. Also see Figure 3.

Terminate single vent caps relative to building components according to Figures 3 and 4.

12”

(305mm)

Minimum

Vertical Vent Termination Clearances

The vent / air intake termination clearances above the high side of an angled roof is as shown in the following chart:

Figure 4

Termination Heights For Vents

Above Flat Or Sloped Roofs Ref. NFPA 54 / ANSI Z223.1

Roof Pitch * Feet * Meters

Flat to 6/12 1.0 0.3

6/12 to 7/12 1.25 0.38 7/12 to 8/12 1.5 0.46

8/12 to 9/12 2.0 0.61

9/12 to 10/12 2.5 0.76

10/12 to 11/12 3.25 0.99 11/12 to 12/12 4.0 1.22

12/12 to 14/12 5.0 1.52 14/12 to 16/12 6.0 1.83

16/12 to 18/12 7.0 2.13 18/12 to 20/12 7.5 2.29 20/12 to 21/12 8.0 2.44

Figure 3 - Multiple Terminations

Horizontal Vent Termination Clearances

The horizontal vent termination must have a minimum of 3" (76 mm) clearance to any overhead combustible projection of 2-1/2" (64 mm) or less (see Figure 5). For projections exceeding 2-1/2" (64 mm), see Figure 5. For additional vent location restrictions refer to Figure 6 on Page 7.

See Figure 28 on Page 18 for the recess allowances, into exterior walls, of the square horizontal terminations.

Figure 5 - Side Elevation View

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 7

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

NOTE: Local Codes Or Regulations May Require Different Clearances.

NOTE: Location Of The Vent Termination Must Not Interfere With Access To The Electrical Service.

3 ft.



3 ft.

Exterior Wall

Horizontal

Termination

= Air Supply Inlet

* See Item D in the Text Below.

*18”

24"

Inside Corner

Center Line

of Termination

18”

36"

DETAIL D

Ventilated Sofﬁt

Fixed

Closed

Window

= Vent Terminal

Inside

Corner Detail

= 9" in U.S.



=12" in Canada

Operable

Window

= Area where Terminal is NOT permitted



Minimum Clearances Canadian Installation * US Installation **

A = Clearance above grade, veranda, porch, deck

or balcony.

B = Clearance to window or door that may be opened. 6" (15.2 cm) for appliances < 10,000 BTU/hr (3kW),

C = Clearance to permanently closed window 12" (305 mm) recommended to prevent window conden-

12" (30 cm) * 12" (30 cm) **

12" (30 cm) for appliances > 10,000 BTU/hr (3kW) and < 100,000 BTU/hr (30kW), 36" (91 cm) for appliances > 100,000 BTU/hr (30kW)*

sation

6" (15.2 cm) for appliances < 10,000 BTU/hr (3kW), 9" (23 cm) for appliances > 10,000 BTU/hr (3kW) and < 50,000 BTU/hr (15kW), 12" (30 cm) for appliances > 50,000 BTU/hr (15kW)*

9" (229 mm) recommended to prevent window con-

densation

D = Vertical clearance to ventilated sofﬁt located

24" (61.0 cm) 24" (61.0 cm)

above the terminal within a horizontal distance of

36" (91.4cm) from the center line of the terminal

E = Clearance to unventilated sofﬁt 24" (61.0 cm) 24" (61.0 cm) F = Clearance to outside corner 5" (12.7 cm) 5" (12.7 cm) G = Clearance to inside corner 36" (91.4 cm) 24" (61.0 cm)

H = Clearance to each inside of center line extended above meter / regulator assembly

3 feet (91 cm) within a height of 15 feet above the meter /

regulator assembly *

3 feet (91 cm) within a height of 15 feet above the meter

/ regulator assembly **

I = Clearance to service regulator vent outlet 3 feet (91 cm) * 3 feet (91 cm) **

J = Clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other appliance

6" (15.2 cm) for appliances < 10,000 BTU/hr (3kW), 12" (30 cm) for appliances > 10,000 BTU/hr (3kW) and < 100,000 BTU/hr (30kW), 36" (91 cm) for appliances > 100,000 BTU/ hr (30kW)*

6" (15.2 cm) for appliances < 10,000 BTU/hr (3kW), 9" (23 cm) for appliances > 10,000 BTU/hr (3kW) and < 50,000 BTU/hr (15kW), 12" (30 cm) for appliances > 50,000 BTU/hr (15kW)*

K = Clearance to mechanical air supply inlet 6 feet (1.83 meters) * 3 feet (91 cm) above, if within 10 feet (3 m) horizontally**

L = Clearance above paved sidewalk or paved

7 feet (2.13 m) ‡ 7 feet (2.13 m) ‡

driveway located on public property

M = Clearance under veranda, porch, deck or

18" (46.0 cm) * ‡ 18" (46.0 cm) ** ‡

balcony

* In accordance with the current CAN/CGA-B149.1 National Gas and B149.2 Propane Installation Code - Latest Editions.

** In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Codes - Latest Edition. ‡ 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 oor.

Figure 6 - Exterior Horizontal Vent Termination Clearance Requirements

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 8

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

17”

432 mm

14”

356 mm

8-1/4”

210 mm

45°

12”

305 mm

5”

127 mm

12 (305)

10 (254)

8 (203)

6 (152)

4 (102)

(178)

(432)

(381)

(330)

2 (51)

(229)

(279)

MINIMUM CLEARANCES TO COMBUSTIBLES

The appliance is approved with zero clearance to combustible materials on all sides (as detailed in Table 5), with the following exception: When

the unit is installed with one side ﬂush with a wall, the wall on the other side of the unit must not extend beyond the front edge of the unit. In addition, when the unit is recessed, the side walls surrounding

the unit must not extend beyond the front edge of the unit (see Figure 2).

APPLIANCE MINIMUM CLEARANCES*

Inches (millimeters)

Sides 1/2 (13), 0 (0) Spacers **

Top Spacers 0 (0)

Floor 0 (0) Back 1/2 (13), 0 (0) Spacers

Bottom of Appliance To Ceiling 69 (1743)

Vent 3 (76)

Top * / 1 (25.4) Sides & Bottom

SERVICE CLEARANCES Feet (meters)

Front 3 feet (0.9 meters)

Table 5

Combustible Shelf Height -

Top Vent - with 2 Feet Vertical Vent and One 90 Degree Elbow

Model Secure Vent MDLX40 *84-1/16 (2135) MDLX45 *89-1/16 (2252)

* Includes 3" clearance to combustibles (required above vent components)

Do not insulate the space between the appliance and the area above it.

Shelf Height

(see table)

Figure 7

Shelf Above Fireplace With Top Venting

Inches (millimeters)

2-1/2 ft (to centerline) Vertical Vent (minimum)

*NOTE: 3" (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. See Page 28 for hearth extension requirements.

Shelf Height

To provide for the lowest possible shelf surface, 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 ap- pliance 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 9 and Figure 51 on Page 28.

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 removable glass panel.

Vertical installation clearances to combustible mantels vary according to the depth of the mantel. See Figure 8. Mantels constructed of non- combustible materials may be installed at any height above the appliance

opening. Minimum clearance requirements include any projections such

as shelves, window sills, mantels, etc. above the appliance.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

NOTE: We recommend the use of high temperature paint (rated 175° F or higher) on the underside of the mantel.

Figure 8

Combustible Materials Allowed In Shaded Area "Safe Zone"

Side Wall

Figure 9

Top of Appliance

Side Wall

MANTEL

Top View of

Minimum Distance to Protected Side Wall

Minimum Distance to Unprotected Side Wall

CLEARANCES

Inches (mm)

Fireplace

(side view)

Fireplace

MANTEL

Page 9

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

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.

DETAILED INSTALLATION STEPS

The appliance is shipped with all gas controls and components installed and prewired.

1. Remove the shipping carton, exposing the front glass door on the valve access side.

2. Using a Phillips screwdriver, unfasten two

(2) screws located at the top of the glass

frame (see Figure 46 on page 26). Tilt the top of the glass frame away from the unit. Lift it carefully off the bottom door track and set the door aside, protecting it from inadvertent damage.

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 Page numbers references in the following steps for detailed procedures.

Step 1. (Page 9) Construct the appliance

framing. Position the appliance within the framing and secure with nailing brackets.

Step 2. (Page 11) Route gas supply line to the

right side.

Step 3. (Page 12) Install the vent system and

exterior termination.

Step 4. (Page 21) Connect 120 VAC electrical

power to the appliance receptacle.

Step 5. (Page 23) Remove glass door assem-

bly.

Step 6. (Page 23) Make connection to gas

supply.

Step 7. (Page 23) Verifying appliance opera-

tion.

Step 8. (Page 24) Install ﬁrebox liner panels,

logs, and glowing embers

contemporary burner/ﬂoor kit, porce-

lain panels, and media.

Step 9. (Page 26) Install glass door assembly. Step 10. (Page 26) Adjust burner to ensure

proper ﬂame appearance.

Step 11. (Page 29) Attach safety in operation

warnings.

Step 1. FRAMING

Frame these appliances as illustrated in Figure 11 on Page 10, unless the appliance is to be installed in a corner. See Figure 12 on Page 11 for corner framing installations. 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 spacers 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.

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 10). Use 8d nails

or their equivalent.

Use Top Flange For 1/2” Thick Drywall

Front Of Fireplace

Use Center Flange For Flush Mount

Use Bottom Flange For 5/8” Thick Drywall

Left Side Front Corner of Fireplace Shown

(Right Side Requirements the Same)

Unit Being Secured By Its Nailing Flanges

To The Framing

NOTE: The nailing ﬂanges, combustible members and screw heads located in areas directly adjacent to the nailing ﬂanges, are EXEMPT from the 1/2” clearance to combustible requirements for the ﬁrebox outer wrapper. Combustible framing may be in direct contact with the nailing ﬂanges and may be located closer than 1/2” from screw heads and the ﬁrebox wrapper in areas adjacent to the nailing ﬂanges. Frame the opening to the exact dimensions speciﬁed in the framing details of this manual.

Unit Being Secured by Its Nailing

Flanges to the Framing

Figure 10

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 10

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Top View

Front View

5-3/32 (129)

Right Side View

14-1/8 8-1/2” (216)

5-1/4” (133)

(359)

26-15/32

(672)

25-29/32

(658)

25-1/2

(648)

2-1/2 (64)

(178)

19-5/8

(498)

Gas Inlet

(This

Side

Only)

Electrical

Inlet

8-3/8 (213)

Framing should be constructed

of 2x4 or larger lumber.

8-1/2 (216)

(

330

)

VENT FRAMING TOP VENT WITH 2 FEET VERTICAL VENT AND ONE 90° ELBOW

Framing should be constructed

of 2x4 or larger lumber.

Inches (mm)

(641)

25-1/4

(

381

)

6-1/2 (165)

1/2 A

PIPE CENTERLINE

Framing Dimensions

Models A B C

MDLX40

in. 50-3/4 43 75-1/8

mm 1289 1092 1908

MDLX45

in. 56-7/8 48 80-1/16

mm 1445 1219 2034

Thermal Efﬁciency (%)

Natural Gas Propane

Models P4 P4

MDLX40 35.8 TBD MDLX45 51.2 TBD

MDLX40

MDLX45

Figure 11 - Fireplace and Framing Speciﬁcations

Model

No.

Notes

A B C D E F G H J

in. 50-5/8 37-1/4 42-7/8 25-5/16 34 37-5/8 33-3/32 29-9/32 34-3/4

mm 1286 946 1089 643 864 956 840 744 883

in. 56-11/16 42-1/4 47-7/8 28-3/8 40-1/8 43-5/8 38-3/32 34-1/2 40-59/64

mm 1440 1073 1216 721 1019 1108 968 876 1039

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Fireplace Dimensions

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.

Vent Size

Coaxial DV

Vent Size

8" Inner

11" Outer

Page 11

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Right Side Front Corner Of Fireplace Framing

6-1/4”

(159 mm)

19-5/8”

(498 mm)

Back wall of chase/enclosure

(including any finishing materials)

Model

No.

MDLX40

in. 50-5/8 83-5/8 59-1/8 41-7/8

A B C D

mm 1286 2124 1502 1064

MDLX45

in. 56-3/4 89-7/8 63-1/2 44-7/8

mm 1441 2283 1613 1140

Figure 12 - Corner Framing with Square Termination (SV8HTS)

Step 2. ROUTING GAS LINE

Route a 1/2" (13 mm) gas line along the inside

of the right side framing as shown in Figure

13. 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 exible gas line connector and 1/2" shutoff

valve. (See Step 6 on Page 22).

The incoming gas line should be piped into the valve compartment and connected in one of the two methods as shown in Figure 36 on Page 23.

Figure 13

Proper Sizing of Gas Line

Properly size and route the gas supply line from the supply regulator to the area where the

appliance is to be installed per requirements

outlined in the National Fuel Gas Code, NFPA

54 - latest edition (USA) or CAN/CGA-B149.1

- latest edition (Canada).

Never use galvanized or plastic pipe. Refer to Table 6 for proper sizing of the gas supply line, if black iron pipe is being used. Gas lines must be routed, constructed and made of materials that are in strict accordance with

local codes and regulations. We recommend that a qualied 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 unqualied should attempt sizing

or installing gas piping.

Schedule 40 - Black Iron Pipe

Inside Diameter (Inches)

Schedule 40 Pipe

Length (feet)

0 - 10 1/2" 3/8"

10 - 40 1/2" 1/2"

40 - 100 1/2" 1/2"

100 - 150 3/4" 1/2" 150 - 200 3/4" 1/2"

Table 6

Natural

Gas

Propane

Gas

NOTES:

• All appliances are factory-equipped with a exible gas line connector and 1/2" shutoff

valve (see Figure 36 on Page 23).

• 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 6 (Page 23).

• 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 (see Figure 36 on Page 23).

• Check with local building ofcial for local code requirements.

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.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 12

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

RESTRICTOR

APPLIANCE VENT OUTLET

When vertically terminating the vent system above the roof, install a vent restrictor in the top vent of the fireplace outlet. Install the restrictor as shown from inside the unit, in the inner fireplace collar

Step 3. INSTALL THE VENT SYSTEM

General Information These instructions should be used as a guide-

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. 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 venting components. See Approved Vent Components on Page 2.

These ﬁreplaces must be vented directly to the outside.

The vent system may not service multiple appliances, and must never be connected to a ﬂue serving a separate solid fuel burning appliance. The vent pipe is tested to be run inside

an enclosing wall (such as a chase). There is no requirement for inspection openings in the

enclosing wall at any of the joints in the vent pipe.

Installation of Vent Restrictor

A vent restrictor may be needed with this appliance. The restrictor is installed in the appliance top ﬂue outlet as shown in Figure 14,

For vertical venting from 6 feet to 12 feet or more, from the top of the ﬁreplace to the top of the termination, the installation of a vent restrictor is required.

If necessary, install a vent restrictor in the appliance ﬂue outlet as shown in Figure 14. The vent restrictor is held in place by friction, only.

NOTE: The restrictor is included within the ﬁrebox.

Figure 14 - Vent Restrictor Installation

Select Venting System - Horizontal or Vertical

With the appliance secured in framing, determine 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 venting components is shown on Page 30.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 13

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Termination

Flashing And Storm Collar

Firestop/Spacer

SV8 6/12/24/36/48 Vent Sections

40' Max

(12.2 M)

6' Min

(1.8 M)

1" (25 mm) Minimum Clearance to Combustibles

lanimoN

noitceSlanimoN )sehcni(htgneL

621426384

T O T A L

Q T Y

noitceSteN

)sehcni(htgneL

2/1-42/1-012/1-222/1-432/1-64

tneVfothgieHsnoitceStneVforebmuN

sehcnitf

44121100034

0515.21010034

5.451578.21110035

5.061573.31020035

5.271573.41000505

77157.41100506

38152.51010506

6815.51000044

5.091578.51100045

5.691573.61010045

5.502521.71011507

70252.71000606

5.112526.71100607

5.712521.81010607

5.922521.91001607

5.232573.91000055

73257.91100056

5.142521.02000707

6425.02100708

25212010708

46222001708

67232000808

97252.32000066

5.082573.32100809

5.382526.32100

067

5.982521.42010067

5.103521.52001067

5.013578.52000909

5135.621009001

5.523521.72000077

0335.72100078

63382010078

54357.82000 01001

5.943521.92100 01011

27313000088

5.673573.13100089

5.973526.13000 11011

5.814578.43000099

32452.531000901

56457.8300000101

VERTICAL TERMINATION SYSTEMS (ROOF)

See Figure 15 and Figures 23 through 25 on Page 16 and their associated Vertical Vent

Tables which illustrate the various vertical venting conﬁgurations that are possible for use with these appliances. Secure Vent

pipe applications are shown in these ﬁgures. A Vertical Vent Table summarizes each system’s minimum and maximum vertical and horizontal length values

5.4573.0100001

957.0200002

5152.1110002

that can be used to design and install the vent components in a variety of applications.

1257.1020002

The vertical vent system terminates through the roof. The minimum vent height above the roof and/or adjacent walls is speciﬁed in ANSI

Z223.1 - latest edition (In Canada, the current CAN/CGA-B149.1 installation code) by major

building codes. Always consult your local

codes for specic requirements. A general

guide to follow is the Gas Vent Rule (refer to

Figure 4 on Page 6).

Vertical (Straight) Installation

(Figure 15)

Determine the number of straight vent 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 (see Tables on this page and Page 30 - Vent Sections). Plan the vent lengths so

that a joint does not occur at the intersection of ceiling or roof joists. Refer to the Vent Section Length Chart.

Figure 15

5457.3002002

1552.4100012

7557.4001102

6652.5022004

9657.5000202

27610 30

1857.6000112

095.7021014

3957.7000022

69810 12

2015.8200024

80191003

4115.9020024

71157.9105006

6215.01001304

53152.11006006

8315.11000404

Table 7: Vent Section Length Chart

NOTE: Convert inches into metric equivalent measurement, as follows:

Millimeters (mm) = Inches x 25.4 Centimeters (cm) = Inches x 2.54 Meters (M) = Inches x .0254

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

htgneLnoitceS

621426

)sehcni(

noitceSteN

2/1-42/1-012/1-2

)sehcni(htgneL

tneVfothgie

sehcnitf

5.01578.0010001

5.91526.12100

5.22578.1001001

5.52521.2120003

5.13526.2030003

5.43578.2000101

5.73521.3111003

5.34526.3021003

5.64578.3000011

5.94521.4102003

5.55526.4012003

5.76526.5003003

5.37521.6100203

5.97526.6010203

5.19526.7002013

5.79521.8100023

5.301526.8000303

5.811578.9110305

5.031578.01101305

5.931526.11000033

5.241578.11100405

/1-4

/1-64

noitceStneVforebmuN

T O T A L

Q T Y

Model Effective Length

SV8L6 4-1/2" SV8L12 10-1/2" SV8L24 22-1/2" SV8L36 34-1/2" SV8L48 46-1/2"

Table 8 - Effective Vent Length

Page 14

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Minimum

13”

(330 mm)

Minimum

13”

(330 mm)

Vertical (Offset) Installation

Analyze the vent routing and determine the

quantities of vent sections and number of elbows required. Refer to Vertical Vent Figures and

Tables on Page 16 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 13 for an aid in select- ing length combinations. Elbows are available

in 90° and 45° congurations. Refer to Figure 20 on Page 15 for the SV8 E45 and SV8 E90

elbow dimensional speciﬁcations.

Where required, a telescopic vent section (SV8LA) may be used to provide the installer

with an option in installing in tight and conﬁned spaces or where the vent run made up of ﬁxed length pieces develops a joint in a undesirable

location, or will not build up to the required

length. The SV8LA Telescopic Vent Section has

an effective length of from 1-1/2" (38 mm) to 6-3/4" (171 mm). The SV8LA is tted with a

dimpled end (identical to a normal vent section

component) and a plain end with 3 pilot holes.

Slip the dimpled end over the locking channel end of a standard SV8 vent component the

required distance and secure with three screws.

Maintain a minimum 1" (25 mm) clearance to combustible materials for all vertical elements. Clearances for all horizontal elements are 3" (76 mm) on top, 1" (25 mm) on sides and 1" (25 mm) on the bottom.

A. Frame ceiling opening - Use a plumb line

from the ceiling above the appliance to locate center of the vertical run. Cut and/or frame an

opening, 13" x 13" (330 mm x 330 mm) inside

dime nsions, about this center mark (Figure 16).

Roof Framing

Ceiling Framing

Plumb Bob

Figure 16

B. Attach vent components to appliance Secure Vent

SV8 direct-vent system components are unitized concentric pipe components featuring positive twist lock connections (see

Figure 17).

All of the appliances covered in this document are ﬁtted with collars having locking inclined channels. The dimpled end of the vent components ﬁt over the appliance collar to create the positive twist lock connection.

Align the dimple (four places) of the upper vent section with the opening of the locking incline channel on the lower vent section or appliance collar. Twist vent component clockwise to engage and seal until arrow and

Arrow

Appliance Collar or Vent Section

dimple align.

Dimple

Locking Incline Channel

Connected Vent Sections

Arrow

Figure 17

To attach a vent component to the appliance collar, align the dimpled end over the collar, adjusting the radial alignment until the four locking dimples are aligned with the inlet of the four inclined channels on the collar (refer to Figure 17). Push the vent component against the collar until it fully engages, then twist the component clockwise, running the dimples down and along the incline channels until they seat at the end of the channels. The unitized design of the Secure Vent components 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. C. Attach vent components to each other - Other

vent sections may be added to the previously installed section in accordance with the requirements 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 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 17.

D. Install ﬁrestop/spacer at ceiling - When

using Secure Vent, use SV8BF restop/spacer

at ceiling joists. 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. Remember to maintain 1" (25 mm)

clearance to combustibles, framing members, and attic or ceiling insulation when running vertical chimney sections. Attic insulation shield (H3908) may be used to obtain the required clearances indicated here. See installation accessories on Page 30. The gap

between the vent pipe and a vertical ﬁrestop can be sealed with non-combustible caulking.

E. Support the vertical vent run sections -

NOTE: Proper venting support is very important. The weight of the vent must not be supported by the ﬁreplace in any degree.

Support the vertical portion of the venting

system every 8 feet (2.4 m) above the replace

vent outlet.

Blocking

Support Straps (Plumber's tape)

8 feet (2.4 m)

Maximum

1" (25.4 mm) minimum clearance to combustibles

Figure 18

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 15

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Storm Collar

One method of support is by utilizing ﬁeld provided support straps (conventional plumber's

tape). Secure the plumber's tape to the framing

members with nails or screws. Strap 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. See Figure 18 on Page 14.

F. Change vent direction to horizontal/inclined run - At transition from or to a horizontal/inclined

run, install the SV8 E45 and SV8 E90 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 possibility of unlocking any of the previously connected vent sections. See

Figure 17 on Page 14 and Figure 19.

10"

(254mm)

Swivel Joint

(360° swivel)

SV8E45

(45° Elbow)

(153mm)

Swivel Joint

(360° swivel)

SV8E90

(90° Elbow)

Figure 19

G. Continue installation of horizontal/inclined sections - Continue with the installation of the

straight vent sections in horizontal/inclined run as described in Step C. Install support straps

every 3 ft (914 mm) along horizontal/inclined

vent runs using conventional plumber’s tape.

See Page 17, Figure 26. It is very important that the horizontal/inclined run be maintained in

a straight (no dips), slightly elevated plane. The recommended incline is approximately 1/4" per foot (20 mm per meter) horizontal, in a direction

away from the ﬁreplace. The rise per foot run ratios that are smaller are acceptable all the way down to at or near level. Use a carpenter’s level to measure from a constant surface and adjust the support straps as necessary.

It is important to maintain the required clearances to combustibles: 1" (25 mm) at all sides for all vertical runs; and 3" (76 mm) at the top, 1" (25 mm) at sides, and 1" (25 mm) at the bottom for all horizontal/inclined runs.

H. Frame roof opening - Identify location for vent at the roof. Cut and/or frame opening per Roof Framing Chart (Figure 20).

Framing Dimensions for Roof

Inches (millimeters)

Pitch C D

0/12

6/12

12/12

13"

(330 mm)

13"

(330 mm)

13"

(330 mm)

13"

(330 mm)

15-1/2"

(394 mm)

20-1/2"

(541 mm)

Figure 20 - Roof Framing

I. Install the roof ﬂashing - Extend the vent sections through the roof structure. Install the roof ﬂashing over the vent section and position such that the vent column rises vertically (use carpenters level) (Figure 21). 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.

J. 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 adjusting screw. Apply non-combustible caulking or mastic around the circumference of the joint to provide a water tight seal.

Storm

Flashing

Collar

Figure 21

K. Install the vertical termination - The ﬁnal step involves installation of the Vertical Termination. Extend the vent sections to the height as

shown in the "Vertical vent termination section"

on Page 6. The SV8VTR Vertical Termination (Figure 22) can be installed in the exact same fashion as any other Secure Vent® section. Align the termination over the end of the previously installed section, adjusting the radial alignment until the four locking dimples of the termination are aligned with the inlets of the four incline channels of the last vent section. Push the termination down until it fully engages, then twist the termination clockwise running the dimples down and along the incline channels until they seat at the end of the channels.

Figure 22

If the vent system extends more than 5 feet (1.5

m) above the roof ashing, 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.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 16

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Ceiling Firestop/Spacer (SV8BF)

Wall Firestop/Spacer (SV8HF)

Ceiling

Firestop/Spacer

(SV8BF)

40 feet (12.2 meters)

Maximum

6 feet (1.8 meters)

Minimum

Ceiling

Firestop/Spacer

(SV8BF)

VERTICAL VENT FIGURES/TABLES

Notes:

• SecureVent

the ﬁgures.

• It is very important that the horizontal/

inclined run be maintained in a straight (no dips), slightly elevated plane. The recommended incline is approximately 1/4" per foot (20 mm per meter) horizontal, in a direction away from the ﬁreplace. The rise per foot run ratios that are smaller are acceptable all the way down to at or near level.

• SV8BF (Secure Vent) ﬁrestop/spacer must

be used anytime vent pipe passes through a combustible ﬂoor or ceiling. SV8HF (Secure Vent) ﬁrestop/spacer must be used anytime vent pipe passes through a combustible wall.

• Two 45º elbows may be used in place of one

90º elbow. The same rise to run ratios, as shown in the venting ﬁgures for 90º elbows, must be followed if 45º elbows are used.

(rigid vent pipe) is shown in

Table A

H Maximum

feet (meter) feet (meter)

10 (3.1) 2.5 (0.762) 15 (4.65) 3.5 (1.07) 20 (6.2) 4.5 (1.37)

+ H = 40 feet (12.4 meters) Max.

V + V

V + V1 = 11 feet (3.3 meters) Minimum for MDLX40

V + V1 = 10.5 feet (3.2 meters) Minimum for MDLX45

Example: If 20 feet of (H) horizontal vent run is needed, then 4-1/2 feet minimum of (V) vertical vent will be required.

A Vent Restrictor, as shown in Figure 14 on Page 12, must be used in this application.

V Minimum

A Vent Restrictor, as shown in Figure 15 on Page 12, may need to be used in this application

Figure 23 - Top Vent - Straight

Figure 24 - Top Vent - Two 90 Degree Elbows (Corner Framing with Square Termination (SV8HTS))

Table B

H + H

Maximum

feet (meter) feet (meter)

10 (3.1) 2.5 (0.762) 15 (4.65) 3.5 (1.06) 20 (6.2) 4.5 (1.37)

H + H1 = 20 feet (6.2 m) Max.

V + V1 + H + H1 = 40 ft. (12.4 m) Max.

V + V1 = 11 feet (3.3 meters) Min. for MDLX40

V + V1 = 10.5 feet (3.2 meters) Min. for MDLX45

V Minimum

A Vent Restrictor, as shown in Figure 14 on Page 12, must be used in this application.

Example: If 20 feet of (H+ H tal vent run is needed, then 4-1/2 feet minimum of (V) vertical vent will be required.

Figure 25 - Top Vent - Three Elbows

) horizon-

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 17

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Support

HORIZONTAL (OUTSIDE WALL) TERMINATION SYSTEM

See Figures 26 - 31 and their associated Horizontal Vent tables that illustrate the various horizontal venting conﬁgurations that are possible for use with these appliances. Secure

Vent

pipe applications are shown in these Figures. A Horizontal Vent table summarizes each system’s minimum and maximum vertical and horizontal length values that can be used to design and install the vent components in a variety of applications.

The horizontal vent system terminates through

an outside wall. Building Codes limit or prohibit

terminating in speciﬁc areas. Refer to Figure 6

on Page 7 for location guidelines. Secure Vent SV8 direct-vent system compo-

nents are unitized concentric pipe components featuring positive twist lock connection, (refer to Figure 17 on Page 14). All of the appliances covered in this document are ﬁtted with collars having locking inclined channels. The dimpled end of the vent components ﬁt over the appliance collar to create the positive twist lock connection.

A. Plan the vent run. Analyze the vent routing and determine the

types and quantities of sections required 4-1/2" (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. It is recommended that you plan the venting so that a joint does not occur in the ceiling or roof joists. Allow for elbows as indicated in Figure 20 on Page 15.

Maintain a minimum 1" (25 mm) clearance to combustibles on the vertical sections. Clearances for the horizontal runs are; 3" (76 mm) on top, 1" (25 mm) on sides, and 1" (25 mm) at the bottom.

B. Frame exterior wall opening - Locate the

center of the vent outlet on the exterior wall according to the dimensions shown in Figure 11 on Page 10. Cut and/or frame an opening,

15" x 13" (381 mm x 330 mm) inside dimensions, with 9" above center and 7" below center.

C. Frame ceiling opening - If the vertical route is to penetrate a ceiling, use plumb line to locate the center above the appliance. Cut

and/or frame an opening, 13" x 13" (330 mm x 330 mm) inside dimensions, about this center

(refer to Figure 17 on Page 14). D. Attach vent components to appliance - To

attach a vent component to the appliance collar, align the dimpled end over the collar, adjusting the radial alignment until the four locking dimples are aligned with the inlets of the four incline channels on the collar (refer to Figure 16 on Page 14).

Building

Support

Framing

SV8E90

Elbow

Vertical

Rise

Brackets

Ceiling

Firestop/Spacer

Support the vertical portion of the venting system every 8 feet (2.4m) above the ﬁreplace vent outlet.

Horizontal / Inclined Run

Support Bracket Spacing Every 3 ft (914 mm)

2-1/2 Foot Vertical

Fireplace

Figure 26 - Typical Horizontal Vent Installation

Push the vent component against the collar until it fully engages, then twist the component clockwise, running the dimples down and along the incline channels until they seat at the end of the channels. The unitized design of the Secure Vent components will engage and seal both the inner and outer pipe elements with the same procedure. Sealant and securing screws are

not required.

E. Attach vent components to each other - Other vent sections may be added to the previously installed section in accordance with the re-

quirements of the vent tables. To add another

vent component to a length of vent run, align the dimpled end of the component over the inclined channel end of the previously installed section, 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 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

17 on Page 14.

F. Install ﬁrestop/spacer at ceiling - When using Secure Vent, use SV8BF restop/spacer at ceiling joists. 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.

Remember to maintain 1" (25 mm) clearance to combustibles, framing members, and attic or ceiling insulation when running vertical chimney sections.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

SV8HTS Termination Shown

SV8 L6/12/24/36/48

Vent Sections

Vent (min.)

Exterior Wall

SV8HTS Termination Shown

Exterior Wall

G. Support the vertical run sections - See Step E on Page 14.

H. Change vent direction - At transition from or

to a horizontal/inclined run, install the SV8E45 and SV8E90 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 possibility of unlocking any of the previously connected vent sections (see Figure 17 on Page 14).

I. Continue installation of horizontal/inclined sections - Continue with the installation of the

straight vent sections in horizontal/inclined run as described in Step E on Page 14. Install

support straps every 3 feet (1914 mm) along

horizontal/inclined vent runs using conventional plumber’s tape.

See Figure 26, It is very important that the

horizontal/inclined run be maintained in a straight (no dips), slightly elevated plane. The recommended incline is approximately 1/4" per foot (20 mm per meter) horizontal, in a direction away from the ﬁreplace. The rise per foot run ratios that are smaller are acceptable all the way down to at or near level.

Use a carpenter’s level to measure from a constant surface and adjust the support straps as necessary.

Page 18

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Siding

Stucco

1-1/4” Maximum Recess of Square Termination into Exterior Finishing Material

Exterior Surface of

Framing

5” to 8-1/2”

(127 to 216 mm)

Exterior Surface of Siding

Minimum wall thickness

5” (127 mm)

Interior Surface of

Finished Wall

Maximum wall thickness

8-1/2” (216 mm)

SV8HTS

Square Termination

shown

Maximum Extent of Vent Run Sections to Exterior Surface of Framing

Last Vent Section. Use Telescopic Vent Section (SV8LA), If Necessary

Adaptor

SV8RCH

SV8HTS

Square Termination

Shown

Venting Connection and Exterior Wall Recessing

of the Horizontal Square Termination (SV8HTS).

J. Assemble vent run to exterior wall - If not previously measured, locate the center of the vent at the exterior wall. Prepare an opening as described in Step B on Page 17. Assemble the vent system to point where the terminus of the

last section is within 5" (127 mm) to 8-1/2" (216 mm) inboard of the exterior surface to which

the SV8HTS termination is to be attached, see Figure 29 and Table 9 on Page 19.

If the terminus of the last section is not within this distance, use the telescopic vent section SV8LA, as the last vent section. For wall thicknesses greater than that shown in Figure 28, refer to Table 9 on Page 19. This table lists the additional venting components needed (in

addition to the termination and adaptor) for a

particular range of wall thicknesses.

K. Attach termination adaptor - Attach the adaptor (adaptor - SV8RCH - provided with the

termination) to the vent section or telescoping vent section), or elbow as shown in Figure 27

in the same manner as any SV vent component (refer to Step E on Page 17).

L. Install Firestop/Spacer at exterior wall

- When using the square termination, install

SV8HF Firestop/Spacer over the opening at the exterior side of the framing, long side up, with

the 3" spacer clearance at the top as shown in

Figure 27, and nail into place.

To help minimize water inﬁltration it is recommended that the Firestop/ Spacer (SV4.5HF) be installed on the exterior side of the wall.

8-1/2”

15"

(381 mm)

Adaptor

SV8RCH

6” to 48” Vent Section,

Telescopic vent section.

(216 mm)

6-1/2”

(165 mm)

13"

(330mm)

NOTE: Centerline of Vent Piping is NOT the Same as the Centerline of the Framed Opening.

See Figure 12 on Page 10 for Minimum Distance to Base of Appliance

Base of Appliance

(25 mm)

Figure 27 - Installing the Square Horizontal Termination (SV8HTS)

SV8HTS

Termination

Shown.

(76 mm)

(The Firestop/Spacer may also be installed over

the opening at the interior side of the framing).

M. Install the square termination (SV8HTS)

- For the last step, from outside the exterior

wall, slide the collars of the termination onto the adaptor (the outer over the outer and the

inner inside the inner) until the termination

seats against the exterior wall surface to which it will be attached. Orient the housing of the termination with the arrow pointed upwards. Secure the termination to the exterior wall. The

horizontal termination must not be recessed into the exterior wall or siding by more than the 1-1/4" (32 mm) as shown in Figure 28.

IMPORTANT: The vent termination is hot while in operation and for a period of time following the use of the ﬁreplace. Young children should be carefully supervised when they are in the same area as a hot termination.

For wall thicknesses greater than

Figure 28 - Wall Thickness and Horizontal Termination Requirements

Horizontal terminations have been designed to perform in a wide range of weather conditions. Our terminations meet or exceed industry standards.

When selecting the locations of your horizontal terminations, do not place the termination where water from eaves and adjoining rooﬂines may create a heavy ﬂow of cascading water

8-1/2", see Table 9

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 ARE NOT TO SCALE.

Page 19

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Wall Firestop/Spacer

(SV8HF)

Ceiling

Firestop/Spacer

(SV8BF)

See Table 9 as an aid in venting component selection for a particular range of exterior wall thicknesses.

Venting Components Required for Various Exterior

Wall Thicknesses, when using Square Termination Kit

(SV8HTS - see Figure 28)

Vent Components Required Exterior Wall Thickness - inches (mm)

Termination Kit Only 5 to 8-1/2 (127 to 216) Termination Kit and 6" Vent

Section (SV8L6)

Termination Kit and Tele-

scopic Section (SV8LA)

Termination Kit and Tele-

scopic Section (SV8LA) and

9-3/4 to 14 (248 to 356)

6-3/4 to 15-1/4 (171 to 387)

11-1/4 to 19-3/4 (286 to 502)

6" vent section (SV8L6)

Table 9

Table C

H Maximum

V Minimum

feet (meter) feet (meter)

3.5 (1.07) 2.5 (0.762)

6.5 (1.98) 3.5 (1.07)

8.5 (2.6) 4.5 (1.37)

10.5 (3.2) 5.5 (1.68)

12.5 (3.8) 6.5 (1.98)

14.5 (4.4) 7.5 (2.3)

16.5 (5.0) 8.5 (2.6)

18.5 (5.6) 9.5 (2.9) 20 (6.0) 10 (3.0)

V + H = 40 feet (12.4 m) Max.

H = 20 ft. (6.2 m) Max.

Example: If 20 feet of (H) horizontal vent run is needed, then 10 feet minimum of (V) vertical vent will be required.

HORIZONTAL VENT FIGURES/TABLES

NOTES:

• SecureVent

in the ﬁgures.

• Two 45º elbows may be used in place of one 90º elbow. The same rise

to run ratios, as shown in the venting ﬁgures for 90º elbows, must be followed if 45º elbows are used.

• SV8BF (Secure Vent) ﬁrestop/spacer must be used anytime vent pipe

passes through a combustible ﬂoor or ceiling. SV8HF (Secure Vent) ﬁrestop/spacer must be used anytime vent pipe passes through a combustible wall.

• Itisveryimportantthatthehorizontal/inclinedrunbemaintained

in a straight (no dips), slightly elevated plane. The recommended incline is approximately 1/4" per foot (20 mm per meter) horizontal, in a direction away from the ﬁreplace. The rise per foot run ratios that are smaller are acceptable all the way down to at or near level.

components (rigid vent pipe and terminal) are shown

Square termination (SV8HTS) shown.

See Table 9 as an aid in venting component selection for a particular range of exterior wall thicknesses.

Figure 29 - Top Vent - One 90 Degree Elbow (Elbow Connection Not Directly at Appliance)

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 20

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Wall Firestop/Spacer

(SV8HF)

Wall Firestop/Spacer

(SV8HF)

Ceiling

Firestop/Spacer

(SV8BF)

Wall Firestop/Spacer

(SV8HF)

Ceiling

Firestop/Spacer

(SV8BF)

Wall

Firestop/Spacer

(SV8HF)

Ceiling

Firestop/Spacer

(SV8BF)

HORIZONTAL VENT FIGURES/TABLES

(continued)

See Table 9 on Page 19 as an aid in venting component selection for a particular range of exterior wall thicknesses.

Table D

+ H

Maximum

V Minimum

feet (meter) feet (meter)

3.5 (1.07) 2.5 (0.762)

6.5 (1.98) 3.5 (1.07)

8.5 (2.6) 4.5 (1.37)

10.5 (3.2) 5.5 (1.68)

12.5 (3.8) 6.5 (1.98)

14.5 (4.4) 7.5 (2.3)

16.5 (5.0) 8.5 (2.6)

18.5 (5.6) 9.5 (2.9) 20 (6.0) 10 (3.0)

V + H + H1 = 40 feet (12.4 m) Max.

H + H

= 20 ft. (6.2 m) Max.

Figure 30 - Top Vent - Two 90 Degree Elbows

Table E

+ H1 = 20 feet (6.2 m) Max.

V + V

+ H + H1 = 40 ft. (12.4 m) Max.

V = 2.5 feet Min. (0.762 m)

V + V

= 11 feet (3.35 m) Min. for MDLX40

V + V

= 10.5 feet (3.2 m) Min. for MDLX45

See Table 9 on Page 19 as an aid in venting component selection for a particular range of exterior wall thicknesses.

Figure 31 - Top Vent - Three 90 Degree Elbows

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 21

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Pilot Tube

Spark Electrode

Flame Sensor

IPI Pilot

885 Valve

Optional Split Flow

Battery Holder w/Switch ON/ Remote /OFF

Battery Holder Wire Harness

Reset Switch

(See instructions.)

Power Vent Blower

Power Vent Models Only

Air Pressure Switch

Power Vent Only

Note: On models without pressure

switch, these

connectors are

plugged together.

Main Wire

Harness

Main Power Cord

Control Module

Fuse

ELECTRONIC WIRING DIAGRAM

Ground Y

Battery Holder with Switch

ON/Remote/OFF

(Schematic representation only)

COLOR CODE: B = Black BB = Brown w/Black Stripe BG = Brown w/Green Stripe BL = Blue BR = Brown G = Green GY = Gray O = Orange R = Red W = White Y = Yellow

J-BOX/RECEPTIACLE

WIRING

120V, 60HZ, 1PH

Factory Wired

Field Wired

Junction Box

Tab Intact

n e e r G - d n u o r G

e t i h W - l a r

t u e N

120 VAC - Black

Green Ground Screw

White

Green

Neutral Side of Receptacle

Hot Side of Receptacle

Black

Step 4. FIELD WIRING

CAUTION

Ground supply lead must be connected to the wire attached to the green ground screw located on the outlet box. Failure to do so will result in a potential safety hazard. The appliance must be electrically grounded in accordance with local codes or, in the absence of local codes, the National Electrical Code, ANSI/NFPA 70-latest edition. (In Canada, the current CSA C22-1 Canadian Electrical Code).

CAUTION: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation.

ATTENTION: Au moment de l commandes, étiquetez tous les fils avant de les débrancher. Des erreurs de cáblage peuvent entraîner un fonctionnement inadéquat et dangereux.

’entretien des

Verify proper operation after servicing.

S’assurer que l’appareil fonctionne adéquatement une fois l’entretien terminé.

The gas valve is set in place and pre-wired at the factory.

Electronic Wiring

NOTE: The electronic appliance must be connected to the main power supply.

1. Route a 3-wire 120Vac 60Hz 1ph power

supply to the appliance junction box.

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 10).

3. Remove the cover plate's knockout and then

feed the power supply wire through the knockout opening and into the unit junction box.

4. Connect the black power supply wire to the power outlet's red pigtail lead and the white

power supply wire to the common terminal of the outlet as shown in Figures 32 and 33.

5. Connect the ground supply wire to the pigtail lead attached to outlet's green ground screw.

6. Install the wall-mounted ON/OFF control, as

described in "Installing and initializing the Remote Control System" on Page 22, in a

convenient location near the ﬁreplace.

7. After the wiring is complete, replace the

cover plate.

Figure 33 - J-BOX WIRING

A wiring diagram is provided here for reference purposes only. This information is also provided on schematics attached directly to the appliance on a pullout panel located within the control compartment.

Figure 32

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 22

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Hot Fireplace Will Cause

Severe Burns

Never Allow Children to Touch Glass or other Fire-

place Parts

WARNING

Installing and initializing the Remote Control System

REQUIRED ITEMS (not provided):

• Standard Junction Box

• Paper Clip or similar object (for remote control system initialization)

Installing and Wiring the Receiver (Wall Switch)

The receiver for the Total Comfort Control™ Remote Control System connects directly to the gas valve, stepper motor, and fan control module with an umbilical cord wiring harness.

1. Install a junction box (not provided) on

the wall adjacent to the appliance, within reach of the remote system umbilical cord wiring harness. Position the 6-pin terminal within the junction box in preparation for attachment to the remote receiver.

2. When wall nish is complete, install the

receiver in the previously installed junction box, and connect the 6-pin terminal to the 6-pin connector on the back of the receiver.

3. Install the receiver cover plate, taking care to ensure the receiver switch is properly indexed with the switch cover when aligning the components for attachments.

Initializing the Remote Control System

After completing ﬁreplace installation, initialize the remote control system before operating the ﬁreplace.

4. Insert the three (3) provided AAA batteries

into the battery bay in the transmitter, taking care to correctly align polarity (+/ - ).

5. Insert the four (4) provided AA batteries

into the receiver battery bay (behind the

wall switch plate), taking care to correctly

align polarity (+/ - ).

6. On the receiver, place the three-position

slider switch in the REMOTE position

(Figure 34).

7. On the receiver front cover, insert the end of a paper clip (or other similar object; not

provided) into the hole marked “PRG.”

The receiver will “beep” three times to

indicate it is ready to synchronize with the transmitter.

8. On the transmitter, press the ON button.

The receiver will “beep” four times to

indicate acceptance of the transmitter’s command (and set the receiver to the

transmitter’s specic code). The system

is now initialized.

The remote control system provides remote operation of the following ﬁreplace functions:

• Primary burner ON/OFF

• Flame height and heat output adjustment (six levels)

The receiver accepts commands via radio

frequency from the transmitter and does not require line-of-sight operation.

The slider switch on the receiver can be set to one of three positions:

• ON (manual override)

• OFF (manual override)

• REMOTE (remote control)

See the ﬁreplace Care and Operation Instructions for detailed instructions on using the remote control system to operate the ﬁreplace.

Three-position slider switch in REMOTE position

Remote

Off

PRG

Figure 34 - Receiver (Wall Switch)

LCD Display

ON/OFF Key

ROOM TEMP. Key

UP/DOWN Arrow Key

MODE Key

Figure 35 - Transmitter (Remote Control)

WARNING

Fire hazard. Can cause severe injury or death. The receiver causes ignition of the appliance. The appliance can turn on suddenly. Keep away from the appliance burner when operating the remote system or activating manual bypass of the remote system.

CAUTION

Property damage hazard. Excessive heat can cause property damage. The appliance can stay lit for many hours. Turn off the appliance if it is not going to be attended for any length of time. Always place the transmitter where children can not reach it.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 23

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Gas Valve

Access Plate

Right Side

Modesty Panel

Gas Valve

3/8" NPT x

Flare Fitting

3/8" Flex Tubing

3/8" Nipple

3/8" Union

3/8" Close Nipple

3/8" Shut-off Valve

1/2" x 3/8"

Reducer

Gas

Stub

1/2" x 3/8" Flare

Shut-off Valve

Gas Solid Line Connector

Gas Flex Line Connector

*Sediment Trap

Min

Igniter

Step 5. REMOVE GLASS DOOR FRAME

Remove the glass door assembly. See Installation and Removal of Glass Door on Page 26.

Step 6. CONNECTING GAS LINE

All codes require a shut-off valve mounted in the

supply line. The orientation of the shut-off valve should face the front. Figure 36 illustrates two methods for connecting the gas supply. A Sediment Trap is recommended to prevent moisture and debris in gas line from damaging the valve.

The ﬂex-line method is acceptable in the U.S.A. where local codes permit, however, Canadian requirements vary depending on locality. Installation must be in compliance with local codes.

These appliances are equipped with a gas ex-

line for use in connecting the unit to the gas line. See Figure 36 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.

The gas control valve is located on the right side of the unit.

When using solid gas line connector, access

the valve by removing the front door assembly on the valve access side and the access plate (see Figure 37).

The electronic control valve has a 3/8" (10 mm)

NPT thread gas supply inlet.

Bring the shutoff valve on the end of the ex-line

over to the hard pipe and tighten with wrenches from above through the ﬁrebox opening.

Secure all joints tightly using appropriate tools and sealing compounds (ensure propane resistant compounds are used in propane applications). It is recommended to seal around the gas line to prevent cold air leakage.

Figure 37

TEST ALL CONNECTIONS FOR GAS LEAKS (FACTORY AND FIELD):

WARNING

Never use an open ﬂame to check for leaks.

Turn on gas supply and test for gas leaks using a gas leak test solution (also referred to as bubble

leak solution).

NOTE: Using a soapy water solution is an

effective leak test solution but it is not recommended, because the soap residue that is left on the pipes/ﬁttings can result in corrosion

over time.

A. Light the appliance (refer to the lighting

instructions label in the control compartment or in the Care and Operation Instructions

manual).

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

receiver or remote control to the “OFF” position.

Either tighten or refasten the leaking connection, then retest as described above.

C. When the gas lines are tested and leak-free

be sure to rinse off the leak testing solution.

D. Re-install the access plate, making certain the

gasket has not been damaged.

Step 7. CHECKING APPLIANCE OPERATION

Turn on burner then observe the individual

tongues of ame 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.

With gas line installed run initial system checkout before closing up the front of the unit. Follow the lighting instructions provided in the Care and Operation Instructions manual.

NOTE: Lighting Instructions are also found on the literature tag tied to the bracket above the gas valve. To access the tag, reach into the right side opening.

When rst 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 purging. Inspect the pilot ame (remove logs, if necessary, handling carefully).

Electronic Appliance Checkout

To light the burner, turn “ON” the optional remote

wall switch or turn the appliance mounted ON/

OFF switch to the “ON” position. Ensure the

igniter lights the pilot. The pilot ﬂame should engulf the ﬂame sensor as shown in Figure 38.

Figure 36 - Gas Connection

NOTE: The gas supply line must be installed in accordance with building codes by a qualiﬁed installer approved and/or licensed as required by the locality. In the Commonwealth of Massachusetts, installation must be performed by a licensed plumber or gas ﬁtter.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Pilot Hood

Flame Rod (Sensor)

Figure 38

Page 24

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Step 8. LOG, VOLCANIC STONE, AND GLOWING EMBER PLACEMENT

NOTE: If installing the Contemporary Burner/Floor Kit, skip this step and instead refer to the instructions provided with the kit.

WARNING

• DO NOT operate this appliance without the

required accessories properly installed:

- ﬂoor (log set or contemporary kit), and

- ﬁrebox liner panels (ceramic or porcelain).

WARNING

• DO NOT attempt to install the logs until the appliance installation has been completed, the gas line connected and tested for leaks and the initial burner operation has been checked out.

The size and position of the log set was engineered

•

to give the appliance a safe, reliable and attractive ﬂame pattern. Any attempt to use a different log set in the ﬁreplace will void the warranty and will result in incomplete combustion, sooting, and poor ﬂame quality.

Logs get very hot and will remain hot up to one

•

hour after gas supply is turned off. Handle only when logs are cool. Turn off all electricity to the appliance before you install grate, volcanic stone, embers and logs.

This appliance is not designed to burn wood. Any

•

attempt to do so could cause irreparable damage to the appliance and prove hazardous to your safety.

If logs are not installed according to the log

•

installation instructions, ﬂame impingement and improper combustion could occur and result in soot and/or excessive production of carbon monoxide (CO), a colorless, odorless, toxic gas.

Step 4. Position the individual logs as shown in Figures 42 through 46.

Logs should be placed in the order shown. Place logs 2 and 3 against the pins on the grate, NOT over them.

Proper log and twig placement is critical to encourage outstand-

ing ame appearance and prevent sooting. When positioned

properly as shown, twigs will be positioned between ﬂame peaks and will not impinge any ﬂames.

Cat. No. Model Description

88L53 FGE Bag of Glowing Embers 80L42 FDVS Bag of Volcanic Stone H8312 PGE Bag of Platinum Embers

Table 10 - Firebox Accessories / Parts

Figure 39

For Propane Gas Only: Do Not Place Embers On Main Ports.

Glowing Embers (Rockwool)

Step 1. Install the ceramic or porcelain ﬁrebox liner panels per the

instructions provided in kit (P/N 506019-91).

Step 2. Place volcanic stone around the burner (the entire bag of volcanic

stone will NOT be used). DO NOT PLACE VOLCANIC STONE ON THE BURNER. See Figure 41.

Step 3. Separate the glowing embers (rockwool) into pieces about the

size of a quarter (see Figure 39). Keep the pieces ﬂuffed, not matted. Distribute these pieces over the burner as shown in Figure

40. Do not use more than necessary. When properly positioned,

the Glowing Embers will cover approximately 75% of the burner on natural gas. For propane gas, do not place embers on main ports.

NOTE: Excessive use of embers may result in sooting or poor ﬂame. This appliance is provided with enough Glowing Embers for several applications, do not feel compelled to use all that is in a new bag. For best glowing effect, replace the ember material annually. Replacement Glowing Embers are available (Catalog Number 88L53).

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Figure 40

Volcanic Stone

Figure 41

Page 25

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

MDLX40 & MDLX45 Log Placement

Figure 42

Log Number Description

1 Log, Center

2 Log, Rear

3 Log, Center/Left 4 Log, Center/Right

5 Log, Rear/Top

6 Log, Front/Left

7 Log, Front/Center

Figure 44

Align Groove At The Bottom Of Log (2) Over The Grate And Push It Towards The Rear.

Figure 43

Align Two Holes At Bottom Of Log (1) Over The Pins On The Gas Burner.

Engage Logs (3 & 4) With The Grate Pins And Align Groves At The Bottom Of The Logs Over The Grate.

Figure 45

6 5

Engage Log (6) With The Grate Pin And Align Groove At The Bottom Of The Log Over The Grate.

Align Hole At Bottom Of Log (5) Over The Pin On Log (2).

Engage Log (7) With The Pin On Log (4).

Figure 46

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 26

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Step 9. INSTALLATION AND REMOVAL OF GLASS DOOR

WARNING

• When reinstalling the glass

door, the door latch screws must be securely tightened to prevent the glass door from falling out, which could potentially cause damage and possible injury.

• Do not attempt to substitute the

materials used on this door, or replace cracked or broken glass.

• Handle this glass with extreme

care! Glass is susceptible to damage - Do not scratch or handle roughly while reinstalling the glass door frame.

• The glass door of this appli-

ance must only be replaced as a complete unit as provided by the manufacturer. Do not attempt to replace broken, cracked or chipped glass separately.

• Do not attempt to touch the

front enclosure glass with your hands while the ﬁreplace is in use.

WARNING

Do not operate appliance with the glass front removed, cracked or broken.

AVERTISSEMENT

Ne pas utiliser l'appareil si le panneau frontal en verre n'est pas en place, est craqué ou brisé.

Only doors certiﬁed with the appliance shall be used.

Seules des portes certiﬁées pour cet appareil doivent être utilisées.

Installing Glass Enclosure Panel (see Figure 47)

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.

Position the door in front of the ﬁrebox opening with the top of the door held away from the ﬁreplace (Figure 47). Lower the bottom of the door assembly on the bottom door track and set on padded surface. Pivot the door up after engaging and centering in the base channel.

Using a Phillips screwdriver, fasten the door

frame to the door latch with the two (2) screws.

The latch should pull forward to engage the door frame.

Install the door modesty shield on top ﬂange glass door as follows: grab the door modesty shield with both hands, with the open hem going down and engage it with the upper lip of the glass door frame by pushing it all the

way down. Make sure the installed shield is

ﬁrmly in place.

With the rescreen hanging on the screen rod,

insert the right side of the rod into the existing

hole on the right modesty panel. Bend down

the rod at the center and drop the left end into the slot on the left modesty panel, being careful not to scratch the paint.

Top Flange Glass door assembly

Screws

Firebox Floor

Glass Door Assembly

Glass Door Latch (2)

Figure 47 - Installing the Glass Door

Step 10. BURNER ADJUSTMENTS

Flame Appearance and sooting

Proper ﬂame appearance is a ﬂame which is blue at the base and becomes yellowish-orange

in the body of the ame. When the appliance is

ﬁrst lit, the entire ﬂame may be blue and will gradually turn yellowish-orange during the ﬁrst 15 minutes of operation. After 15 minutes of operation, if the ﬂame is blue, or if the ﬂame is

orange with evidence of sooting (black tip), the

air shutter opening may need to be adjusted.

If the air shutter opening is closed too far, sooting may develop. 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 surfaces adjacent to the vent termination.

Sooting is caused by incomplete combustion in the ﬂames and lack of combustion air entering the air shutter opening. To achieve a warm yellowish-orange ﬂame with an orange body that does not soot, the shutter opening must be adjusted between these two extremes.

Air Shutter Adjustment Guidelines

• If there is smoke or soot present, rst check

the log set positioning to ensure that the ﬂames are not impinging on any of the logs. If the log set is properly positioned and a sooting condition still exists, then the air shutter opening should be increased.

• The more offsets in the vent system, the larger

the air shutter opening will need to be.

• An appliance operated with the air shutter

opened too far, may have ﬂames that appear blue and transparent. These weak, blue and transparent ﬂames are termed anemic.

• Propane models may exhibit ames which

candle or appear stringy. If this is present and persists, adjust the air shutter to a more closed position, then operate the appliance for a few more minutes to ensure that the ﬂame normalizes and the ﬂames do not appear sooty.

The following chart is provided to aid you in achieving the correct air shutter adjustment for your installation.

Amount of

Primary Air

If air shutter is closed too far

If air shutter is open too far

Flame

Color

Flame will be orange

Flame will be blue

Air Shutter

Adjustment

Air shutter gap should be increased

Air shutter gap should be decreased

WARNING: DO NOT abuse glass door by striking or slamming shut.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 27

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Air Shutter

Opening

Burner

Orifice

Gas

Valve

Venturi

Burner Air Shutter Adjustment Procedure

WARNING

• Air shutter adjustment should only be performed by a qualified professional service technician.

• Ensure that the front glass

door assembly is in place and sealed After adjustment.

CAUTION

Main Burner Factory Air Shutter

Opening Setting - Inches (millimeter)

Model Nat.Gas Propane Gas

MDLX40 MDLX45

1/16 (1.59) 9/32 (7.14) 1/16 (1.59) 9/32 (7.14)

Soot will be produced if the air shutter is closed too much. Any damage due to carboning resulting from improperly setting the air shutter is not covered under the warranty.

To adjust the ﬂame, rotate the air shutter toward the back or toward the front of the ﬁreplace. Position the air shutter to the factory setting as shown in the table in Figure 48. Allow the burner to operate for at least 15 minutes. Observe the ﬂame continuously. If it appears weak or sooty as previously described, adjust the air shutter until the ﬂame appearance is as desired.

Use the remote to adjust the ﬂame height as desired.

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 closed as described in the previous paragraphs. Operate the appliance for a period of time as the effect diminishes, ensuring that the appliance

does not develop sooty ames. When satised

that the appliance operates properly, proceed to ﬁnish the installation.

Figure 48

Contemporary Media Shown (MDLX40)

Figure 49 - Burner Flame Appearance

Rustic Oak Logs Shown (MDLX45)

Figure 50 - Burner Flame Appearance

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 28

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Glass Door

Assembly

Fireplace

Finish Combustible Or Non-Combustible Material

Bottom Of Fireplace

1/8”

Minimum

Door Track

Finish Combustible Or Non-Combustible Material

Front Face Of Fireplace

Floor Panel

FINISHING REQUIREMENTS Wall Details

Complete ﬁnished interior wall. To install the appliance facing ﬂush with the ﬁnished wall, position framework to accommodate the thickness of the ﬁnished wall (Figure 51).

Combustible Finished Wall Materials

Header (2x4’s)

Combustible materials are

allowed above this point on the face of the appliance.

8-3/8" Min.

(213 mm)

The gray shaded area must be non-combustible or Dura Rock

Vent & 90° Elbow

Appliance

3" Min.

(76 mm)*

2 Foot Vertical

Top of

Spacers

Non-combustible materials, such as surrounds and other appliance trim, may be installed on the appliance front face with the exceptions.

Vertical installation clearances to combustible mantels vary according to the depth of the mantel (see Figure 8). Mantels constructed of non- combustible materials may be installed at any height above the appliance opening.

Combustible materials may project beyond the side of the ﬁreplace opening as long as it is kept within the shaded area illustrated in Figure 9.

A hearth extension is not required with this appliance. If a hearth extension

is used, there are two methods of installation. One, the ﬁnish combustible or non-combustible material could be ended by butting up against the front face of the ﬁreplace and the ﬂoor panel (refer to Figure 52).

Two, the ﬁnish combustible or non-combustible material could be ended below the ﬁreplace (refer to Figure 53). Remove the ﬂoor panel as shown in Figure 52 by removing the screws on the right side of the panel and sliding the left side away from the tab. Discard the screws and ﬂoor panel.

It is critical that there is at least a 1/8" gap between the bottom of the door track and the surface of the ﬁnish material.

Top of Door Frame

Fireplace (right side)

Installations with horizontal terminations which have minimum

vertical vent height only will require 4”(102mm) minimum side clearance as shown in shaded zone above. All other installations require 1" (25mm) minimum side clearance as specified in Figure 4 on Page 6.

* Insulation is NOT ALLOWED in the clearance zones around vent components. Keep this area free from combustible materials.

Figure 51

Figure 52

Figure 53

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Page 29

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Step 11. INSTALLER INSTRUCTIONS - ATTACHING SAFETY-IN-OPERATION WARNINGS It is the installers responsibility to ensure these warnings are properly afﬁxed during installation. These warning labels are a

critical step in informing consumers of safe operation of this appliance.

ATTACHING SAFETY IN OPERATION WARNINGS

It is required that the set of safety instruction labels

that have been furnished with the ﬁreplace be afﬁxed to the operation and control points of the ﬁreplace. A safety instruction label must be afﬁxed to the receiver wall switch plate where the ﬁreplace is turned on and off (See Figure A) and on the remote control handheld transmitter (See Figure B). To properly complete the installation of this ﬁreplace, locate the multi-lingual adhesive labels provided with the Care and Operation Instructions and proceed as follows:

1. Locate the wall receiver that controls the ﬁreplace (verify the switch operates the ﬁreplace by turn-

ing it on and off). Clean the wall receiver plate

thoroughly to remove any dust and oils. Afﬁx the label to the surface of the plate of the wall receiver that controls the ﬁreplace (Figure A). Choose the language primarily spoken in the home. If unknown, afﬁx the English language label.

2. Locate the remote control transmitter and clean it thoroughly to remove any dust and oils. Afﬁx the label to the surface of handheld transmitter (Figure B). Choose the language primarily spoken in the home. If unknown, afﬁx the English language label.

3. If you are unable to locate the labels, please call Lennox Hearth Products or your nearest Lennox Hearth Products dealer to receive additional safety instruction labels free of charge.

Cat. No. H8024 Replacement Label Kit

LENNOX HEARTH PRODUCTS 1-800-655-2008

NOTE: English is red text on clear label. French and Spanish are white text on black label.

APPOSITION DES MISES EN GARDE RELATIVES À LA SÉCURITÉ D’UTILISATION

Il est impératif que le jeu d’étiquettes de sécurité qui

ont été fournies avec le foyer soient collées à côté

des dispositifs de contrôle du foyer. Une étiquette de sécurité doit être collée sur la plaque du récepteur mural

contrôlant l’allumage du foyer (voir Figure A) et sur le boîtier de la télécommande (Figure B). Pour achever l’installation correcte de ce foyer, procédez comme suit

avec les étiquettes adhésives en langues étrangères

fournies avec les instructions d’utilisation et d’entretien :

1. Repérez le récepteur mural qui contrôle le foyer (vériez que l’interrupteur contrôle le fonction nement du foyer en le faisant basculer de Marche à Arrêt, et vice-versa). Nettoyez soigneusement la plaque du récepteur mural pour éliminer la poussière et les traces de graisse ou d’huile. Collez l’étiquette sur la surface de la plaque du récepteur mural qui contrôle le foyer (Figure A). Choisissez la langue qui est principalement parlée dans la

résidence du propriétaire. En cas de doute, collez

l’étiquette en anglais.

2. Repérez la télécommande et nettoyez-la soigneuse-

ment pour éliminer la poussière et les traces de graisse ou d’huile. Collez l’étiquette sur le boîtier

de la télécommande (Figure B). Choisissez la langue qui est principalement parlée dans la résidence du propriétaire. En cas de doute, collez

l’étiquette en anglais.

3. Si vous ne trouvez pas les étiquettes, veuillez

appeler Lennox Hearth Products ou votre distributeur Lennox Hearth Products local pour recevoir

gratuitement des étiquettes supplémentaires.

Étiquettes de remplacement, n° cat. H8024

LENNOX HEARTH PRODUCTS 1-800-655-2008

Remarque : Le texte anglais est rouge sur un support transparent. Le texte français et espagnol est blanc sur un support noir.

COLOCACIÓN DE ADVERTENCIAS DE SEGURIDAD EN OPERACIÓN

Se requiere que el juego de etiquetas de instrucciones de seguridad que se incluyeron con la chimenea se coloque en los puntos de operación y control de la misma. Se debe colocar una etiqueta de instrucciones

de seguridad en la placa del interruptor de pared del receptor desde el cual se enciende y se apaga la chimenea (ver la Figura A) y en el transmisor de control remoto (ver la Figura B). Para completar correctamente la instalación de esta chimenea, encuentre las etiquetas adhesivas multilingües incluidas con las instrucciones de cuidado y operación y haga lo siguiente:

1. Identique el receptor de pared que controla la chimenea (verique que el interruptor opera la chimenea encendiéndola y apagándola). Limpie bien la placa del receptor de pared para quitar el polvo y aceite. Pegue la etiqueta en la supercie de la placa del receptor de pared que controla la

chimenea (Figura A). Seleccione el idioma que más se habla en la casa. Si no sabe cuál es, use la

etiqueta en inglés.

2. Identique el transmisor de control remoto y límpielo bien para quitar el polvo y aceite. Pegue la etiqueta

en la superﬁcie del transmisor (Figura B). Seleccione

el idioma que más se habla en la casa. Si no sabe cuál es, use la etiqueta en inglés.

3. Si no puede encontrar las etiquetas, sírvase

llamar a Lennox Hearth Products o al distribuidor de Lennox Hearth Products más cercano para

recibir etiquetas de instrucciones de seguridad

adicionales gratuitas.

Juego de etiquetas de repuesto - Nº de cat. H8024

LENNOX HEARTH PRODUCTS 1-800-655-2008

Nota: La etiqueta en inglés es transparente con texto rojo. Las etiquetas en francés y español son negras con texto blanco.

Illustrations are for example only. Your accessories may be different.

Les illustrations sont par exemple uniquement. Vos accessoires peuvent être différents.

Las ilustraciones son sólo ejemplos. Tu accesorios pueden ser diferentes.

Figure 54

SAFETY LABEL

DIAGRAMS

DIAGRAMMES DES ÉTIQUETTES

DE SÉCURITÉ

Figure A

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Remote

Off

PRG

DIAGRAMAS DE ETIQUETAS

DE SEGURIDAD

Figure B

Page 30

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

INSTALLATION ACCESSORIES

Listed Secure Vent® Components

Cat.

No.

H2266 SV8HTS Horizontal Square

H2265 SV8VTR Vertical Termination

H2250 SV8L6 6" (152mm) Vent

H2251 SV8L12 12" (305mm) Vent

H2252 SV8L24 24" (610mm) Vent

H2253 SV8L36 36" (914mm) Vent

H2254 SV8L48 48" (1219mm) Vent

H2255 SV8LA Telescopic Section H2256 SV8E45 45 Degree Elbow

H2257 SV8E90 90 Degree Elbow

Model

No.

Termination with Firestop/Spacer (H2260) and Adaptor (H2267)

Section

Description

H2262 SV8SU Support Strap

H2263 SV8SP Support Plate

H3908 SV8ARSA Attic Insulation

Shield (adjustable 12" to 22")

CTSO-33/44 Shrouds for Single terminations

(ref. Instruction P/N

750193M)

CTSO-46 Shroud for double terminations

1 typ.

Open Top Shroud Kits

Inches (millimeters)

Cat. No. Model A B C D *E

H1985 CTSO-33

H1987

CTSO-44

H1986 CTSO-46

37-5/8

(955)

48-5/8 (1235)

37-5/8

(955)

48-5/8 (1235)

73 1/4

(1860)

7-1/2 (191)

24-1/2

typ.

(622)3 (76)

(622)3(76)

12typ.

The following ﬂashings come packaged with a storm collar

H3236 SV8F Flat Roof Flashing H2258 SV8FA 1/12 to 7/12 Adjust-

able Flashing

H2259 SV8FB 7/12 to 12/12

Adjustable Flashing

H3237 SV8SC6 Storm Collars,

6 pack

H2260 SV8HF Firestop/Spacer -

Horizontal (3-1-1 spacing)

H2261 SV8BF Firestop/Spacer -

Vertical (1-1-1 spacing)

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

(ref. Instruction P/N 750194M)

Closed Top Shroud Termination Kits

Inches (millimeters)

Cat. No. Model A B C D

H1988 CTSA-33

(864)

(127)

(864)

Page 31

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

GAS CONVERSION KITS

WARNING

This conversion kit shall be installed by a qualiﬁed service agency in accordance with the manufacturer’s instructions and all applicable codes and requirements of the authority having jurisdiction. If the information in these instruction is not followed exactly, a ﬁre, explosion or production of carbon monoxide may result causing property damage, personal injury or loss of life. The qualiﬁed service agency is responsible for the proper installation of this kit. The installation is not proper and complete until the operation of the converted appliance is checked as speciﬁed in the manufacturer’s instructions supplied with the kit. The qualiﬁed service agency performing this installation assumes responsibility for this conversion.

AVERTISSEMENT

Cette trousse de conversion doit être installée par un technicien agréé, selon les instructions du fabricant et selon toutes les exigences et tous les codes pertinents de l’autorité compétente. Assurez-vous de bien suivre les instructions dans cette notice pour réduire au minimum le risque d’incendie, d’explosion ou la production de monoxyde de carbone pouvant causer des dommages matériels, des blessures ou la mort. Le tecnicien agréé est responsable de l’installation de cette trousse. L’installation n’est pas adéquate ni complète tant que le bon fonctionnement de l’appareil converti n’a pas été vériﬁé selon les instructions du fabricant fournies avec la trousse. Le fournisseur de service qualiﬁé ayant réalisé l'installation assume les responsabilités liées à la conversion.

Step 1. TURN OFF THE GAS SUPPLY TO THE APPLIANCE and disconnect power supply at the circuit breaker. Ensure appliance is cold.

CAUTION: THE GAS SUPPLY SHALL BE SHUT OFF PRIOR TO DISCONNECTING THE ELECTRICAL POWER, BEFORE PROCEEDING WITH THE CONVERSION.

ATTENTION. AVANT D’EFFECTUER LA CONVERSION, COUPEZ D’ABORD L’ALIMENTATION EN GAZ, ENSUITE, COUPEZ L’ALIMENTATION ÉLECTRIQUE.

Step 2. Remove the front glass door/frame

and the access plate from the appliance. See Figures 37 and 47.

Step 3. Carefully remove the logs and the grate assembly / contemporary media. Exercise care

so as not to break the logs / contemporary media.

Step 4. Refer to Figure 55. Remove the two

5/16" screws securing the burner to the burner

brackets. Carefully slide the burner to the left to clear the venturi from the oriﬁce. Set aside the screws and burner assembly in a secure location for later reinstallation.

Burner Assembly

In Canada: THE CONVERSION SHALL BE CAR-

RIED OUT IN ACCORDANCE WITH THE REQUIREMENTS OF THE PROVINCIAL AUTHORITIES HAVING JURISDICTION AND IN ACCORDANCE WITH THE REQUIREMENTS OF THE CAN/CGA-B149.1 INSTALLATION CODE.

LA CONVERSION DEVRA ÊTRE EFFECTUÉE CONFORMÉMENT AUX RECOMMANDATIONS DES AUTORITÉS PROVINCIALES AYANT JURIDICTION ET CONFORMÉMENT AUX EXIGENCES DU CODE D'INSTALLATION CAN/CGAB149.1.

Gas conversion kits are available to adapt your appliance from the use of one type of gas to the use of another. These kits contain all the necessary components needed to complete the task including labeling that must be afﬁxed to ensure safe operation.

Kit part numbers are listed below, and the following steps detail the conversion procedure.

Natural Gas to Propane Gas

Conversion Kits

Fireplace

Model No. MDLX40IN GCK-

MDLX45IN GCK-

Fireplace

Model No. MDLX40IP GCK-MDLX-

MDLX45IP GCK-MDLX-

Conversion Kit

Model No.

MDLX40NP

MDLX45NP

Propane Gas to Natural Gas

Conversion Kits

Conversion Kit

Model No.

40PN

45PN

Cat. No.

Conversion

Kit Cat. No.

H8668

H8669

H8670

H8671

Gas Valve Assembly

Burner Oriﬁce

Figure 55

Step 5. Remove the control compartment access

door and gasket by removing the twelve (12)

screws securing it, and set it aside for later reinstallation.The gas valve can be accessed through the opening, or the complete assembly can be removed by sliding the assembly to the right.

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

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LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

Step 6. Refer to the instructions provided with the SIT regulator conversion kit. Using a

Torx T20 (with 1/4" shank and center hole) or

slotted screwdriver, remove and discard the two pressure regulator mounting screws, the pressure regulator tower, and the diaphragm

assembly (if applicable). Properly dispose of all removed components. Make sure the rubber

gasket installed on the back of the replacement pressure regulator is properly positioned.

Step 7. Install the new stepper motor pressure regulator assembly using the supplied screws.

Securely tighten the screws (25 lb-in).

Step 8. Attach the enclosed identiﬁcation label to the valve body where it can be easily seen.

Step 9. Make stepper motor and valve electrical connections.

Step 10. Remove the pilot hood assembly to access the hexed pilot orice. Using a 5/32". allen wrench, remove and replace the pilot oriﬁce with the one provided with the kit.

NOTE: Use extreme care to avoid damaging the igniter assembly.

Step 11. Refer to Figure 57 and remove the pilot hood assembly to access the hexed pilot oriﬁce. Remove and replace the oriﬁce with the one provided with the kit.

Step 12. (Refer to Figure 55 on Page 31 and Figure 58)

VERIFY THE PROPER ORIFICE SIZE BEFORE INSTALLING IT.

Pilot Hood

Pilot Oriﬁce

Figure 57

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 and propane models. Figure 58 illustrates the oriﬁce. Use pipe joint compound or Teflon tape on all pipe ﬁttings before installing (ensure propane resistant compounds are used in propane applications, do not use pipe

joint compounds on are ttings).

B. Retrieve the burner and slide the venturi tube

over the oriﬁce. Set the burner assembly into its position and secure it.

C. Reinstall the grate assembly. Step 13. Reassemble the remaining compo-

nents by reversing the procedures outlined in the preceding steps.

Step 14. Attach the conversion label provided in the conversion kit to the rating plate on the appliance.

Step 15. Apply gas to the system and relight

appliance. With the main burner "ON", test the

new pressure regulator assembly and all gas line joints for leaks using a gas leak test solution. See Test All Connections For Gas Leaks on Page 23.

Burner Oriﬁce Sizes

Elevation 0-4500 feet ( 0-1372 meters)

Model Natural Gas

drill size (inches)

MDLX40

MDLX45

Table 11

0.1405" (#28)*

• H2286

0.161" (#20)*

• H2288

* Standard size installed at factory

• Part /Cat. Number

Propane

drill size (inches)

0.086" (#44)*

• H2287

0.093" (#42)*

• H4816

Figure 58

Step 16. Relight the main burner and verify proper burner ignition and operation. See Burner Adjustments Pages 26 and 27.

Inspect the pilot system for proper ﬂame. The pilot ﬂame should engulf the ﬂame sensor as shown in Figure 59.

The lighting instructions can be found on the lighting label in the control compartment or in

the Care and Operation Manual provided with

the appliance. Step 17. Using a manometer, test the inlet and

manifold gas pressures. See Tables 2 and 3 on Page 4.

ALWAYS TEST PRESSURES WITH THE VALVE REGULATOR CONTROL AT THE HIGHEST SETTING.

SEE PAGE 26 FOR AIR SHUTTER ADJUSTMENT GUIDELINES.

Igniter Rod

Pilot Hood

(from DFC Wire Harness)

Manifold (OUT) Test Port

Inlet (IN) Test Port

Wire

(from DFC Wire

Harness)

Main Gas Inlet

3/8" NPT

Figure 56

Green Wire

Connect GTMS wire harness.

Pressure Regulator Tower

Yellow Ground Wire (from DFC Wire Harness)

NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Flame Sensor

Figure 59

Pilot Nozzles

Page 33

NOTES

LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

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LENNOX HEARTH PRODUCTS • MONTEBELLO® DLX DIRECT VENT GAS FIREPLACES (MDLX40/45) • INSTALLATION INSTRUCTIONS

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.

LENNOX®, the LENNOX design, DAVE LENNOX, the image of DAVE LENNOX and other related LENNOX marks are registered or common law trademarks of Lennox Industries Inc. and are used with permission.

P/N 506023-15 Rev. B 04/2013

1508 Elm Hill Pike, Suite 108 • Nashville, TN 37210

Lennox Montebello MDLX40IN, Montebello MDLX45IP, Montebello MDLX40IP, Montebello MDLX45IN Installation Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual