Mendota ML47-PF2 User Manual

FULLVIEW LINEAR DIRECT VENT GAS FIREPLACE HEATER

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 consulta-

tion ultérieure.

WARNING: If the information in this manual is not
followed exactly, a fire or explosion may result
causing property damage, personal injury or loss
of life.
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

• Open windows.

• Do not touch electrical switches.

• Do not try to light any appliance.

• Extinguish any open flame.

• Do not use the phone in your building.

• Immediately call your gas supplier from a neigh-

bor'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.

WARNING
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 part of the control system and
any gas control, which has been under water.

AVERTISSEMENT : Assurez-vous de bien suivre les in­structions donné dans cette notice pour réduire au minimum

le risque d’incendie ou pour éviter tout dommage matéeriel,

toute blessure ou la mort.

• Ne pas entreposer ni utiliser d'essence ni d'autres vape­rurs 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 aucun interrupteur. Ne pas vous servir

des téléphones se trouvant dans le batiment où vous
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 dos incendies.

• L'installation et service doit être exécuté par un qualifié
installer, agence de service ou le fournisseur de gaz.

Flush-Faced Model ML47-PF2

INSTALLATION and OPERATING INSTRUCTIONS MANUAL

DOCUMENT NO. ML47-PF2-IM-0619

85-03-00923 ML47

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85-03-00923 ML47

SAFETY AND WARNING INFORMATION

READ and UNDERSTAND all instructions carefully before starting the appliance. FAILURE TO FOLLOW these instruc­tions may result in a possible fire hazard and will void the warranty.
Any safety screen or guard removed for servicing must be replaced before operating this appliance. Tout écran ou pro­tecteur retiré pour permettre l’entretien de l’appareil doit être remis en place avant de mettre l’appareil en marche.

READ and UNDERSTAND all instructions carefully before starting the appliance. FAILURE TO FOLLOW these instruc­tions may result in a possible fire hazard and will void the warranty.

Any safety screen or guard removed for servicing must be replaced before operating this appliance. Tout écran ou pro­tecteur retiré pour permettre l’entretien de l’appareil doit être remis en place avant de mettre l’appareil en marche.

THIS UNIT IS NOT FOR USE WITH SOLID FUEL.
Installation and repair should be PERFORMED by a qualified service person. The appliance and venting system should

be INSPECTED before initial use and at least annually by a professional service person. More frequent cleaning may be
required due to excessive lint from carpeting, bedding, material, etc. It is IMPERATIVE that the unit’s control compart-
ment, burners, and circulating air passageways ARE KEPT CLEAN to provide for adequate combustion and ventilation
air.

Always KEEP the appliance clear and free from combustible materials, gasoline, and other flammable vapors and liquids.

Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the

fireplace and to replace any part of the control system and any gas control which has 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'lau

In the Commonwealth of Massachusetts:

• Installation must be performed by a licensed
plumber or gas fitter;

•

A CO detector shall be installed in the room where
the appliance is installed.

WARNING: Improper installation, adjustment, altera-

tion, service or maintenance can cause injury or prop­erty damage. Refer to this manual. For assistance or
additional information consult a qualified installer, ser-

vice agency or the gas supplier.

FOR YOUR SAFETY

A qualified installer, service agency, or the gas sup­plier must perform installation and service.
Do not store or use gasoline or other flammable va­pors and liquids in the vicinity of this or any other appli­ance.
WARNING
Do not operate this appliance with the glass removed,
cracked or broken. A licensed or qualified person
should do replacement of glass.

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

brisé. Confiez le remplacement du panneau à un tech­nicien agréé.
WARNING

Mendota gas fireplaces are heat producing appliances.

Do not burn wood, paper or other materials in this fire­place. This fireplace is designed as a supplement
heat source. It is advisable to have an alternative pri­mary heat supply.

The installation must conform with local codes or, in the

absence of local codes, with the current National Fuel
Gas Code, ANSI Z223.1 (NFPA 54) or CAN/CGA
B149.1 Installation Code.
Installer l'appareil selon les codes ou règlements locaux,
ou, en l'absence de tels règlements, selon les Codes

d'installation CAN/CGA-B149.

This appliance may be installed in an aftermarket perma-

nently located, manufactured (mobile) home (USA Only),
where not prohibited by local codes.

This appliance is only for use with the type(s) of gas indi­cated on the rating plate. A conversion kit is supplied
with this appliance.

Cet appareil peut être installé dans un maison préfab­riquée (mobile) déjà installée à demeure si les règle­ments locaux le permettent.

Cet appareil doit être utilisé uniquement avec les types

de gas indiqués sur la plaque signalétique. Ne pas l’uti­liser avec d’autres gas sauf si un kitde conversion cer-

tifié est installé.

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85-03-00923 ML47

NEVER OBSTRUCT the flow of combustion and ventilation air. Keep the front of the appliance CLEAR of all obstacles
and materials for servicing and proper operation.

Due to high temperature, the appliance should be LOCATED out of traffic areas and away from furniture and draperies.
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.

Clothing or flammable material SHOULD NOT BE PLACED on or near the appliance. On ne devrait pas placer de
vêtements ni d’autres matières inflammables sur l’appareil ni à proximité.

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 informés 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.

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. “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, in-

stallez 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.

These units MUST use one of the vent systems described in the Installing Your Fireplace section of the Installers Guide.
NO OTHER vent systems or components MAY BE USED.

This gas fireplace and vent assembly MUST be vented directly to the outside and MUST NEVER be attached to a chim­ney serving a separate solid fuel-burning appliance. Each gas appliance MUST USE a separate vent system. Common
vent systems are PROHIBITED.

If the vent-air intake system is disassembled for any reason, reinstall per the instructions provided for the initial installa­tion.

The vent system assembly for this fireplace must be periodically examined by a qualified service agency.
INSPECT the external vent cap on regular basis to make sure that no debris is interfering with the airflow. The flow of

combustion and ventilation air not to be obstructed
DO NOT abuse the glass door by striking the glass, slamming the door shut, etc.
Use only authorized parts and materials obtained from Johnson Gas Appliance Company when replacing defective or

damaged glass.
DO NOT USE abrasive cleaners on the glass door assembly. DO NOT ATTEMPT to clean the glass door when it is hot.
Turn off the gas before servicing this appliance. It is recommended that a qualified service technician perform an appli-

ance check-up annually.
DO NOT place furniture or any other combustible household objects within 36 inches of the fireplace front.

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Table of Contents

SAFETY AND WARNING INFORMATION .......................................................................................... 2

ML47 FULL VIEW GAS FIREPLACE DIMENSIONS ........................................................................... 7

TECHNICAL SPECIFICATIONS FOR ML47 LINEAR ZC DECORATIVE FIREPLACE ...................... 9

BUILDING PERMIT AND INSTALLATION INSPECTION APPROVAL REQUIREMENTS ............... 10

GENERAL APPLIANCE SPECIFICATIONS ...................................................................................... 11

MANTEL CLEARANCES .................................................................................................................. 11

CLEARANCES TO COMBUSTIBLES FROM APPLIANCE SURFACES .......................................... 13

CLEARANCE TO SIDE WALL PROJECTIONS ................................................................................ 13

PLANNING THE INSTALLATION ...................................................................................................... 13

ROUGH FRAMING DIMENSIONS ..................................................................................................... 14

FRAMING DEPTH AND FINISHING GUIDES .................................................................................... 15

FINISHING MATERIALS INSTALLATION ......................................................................................... 17

DECORATIVE FRONTS INFORMATION: ......................................................................................... 18

NON-COMBUSTIBLE FINISHING MATERIALS REQUIREMENTS .................................................. 20

RAISED HEIGHT INSTALLATION OF ML47 ..................................................................................... 21

RECOMMENDATIONS FOR TELEVISION INSTALLATION............................................................. 22

BACKUP DC POWER INLET PORT INSTALLATION ...................................................................... 27

GENERAL INFORMATION ................................................................................................................ 28

GAS SUPPLY REQUIREMENTS ....................................................................................................... 29

GENERAL INSTALLATION INSTRUCTIONS ................................................................................... 32

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GENERAL FLUE VENTING INSTRUCTIONS ................................................................................... 33

EXTERIOR VENT LOCATIONS AND RESTRICTIONS ..................................................................... 34

FLUE VENTING COMPONENTS IDENTIFICATION ......................................................................... 35

ML47 DOOR OPERATION ................................................................................................................. 45

INSTALLATION CHECK OFF LIST ................................................................................................... 46

LIGHTING CHECK OFF LIST ............................................................................................................ 46

ML47 BURNER MEDIA INSTALLATION INSTRUCTIONS .............................................................. 47

LOCATION OF MASTER SWITCH AND SYNC SWITCH ................................................................. 47

REMOTE CONTROL FUNCTIONS ................................................................ ................................ .... 49

FIRST TIME LIGHTING INSTRUCTIONS .......................................................................................... 52

TROUBLE SHOOTING THE ML47 FIREPLACE & MAINTENANCE INFORMATION ...................... 54

NATURAL TO LP GAS CONVERSION ............................................................................................. 57

ML47 VALVE ASSEMBLY REPLACEMENT PARTS ........................................................................ 62

ML47 GAS IGNITION SYSTEM WIRING DIAGRAM ......................................................................... 63

LISTING LABEL INFORMATION ....................................................................................................... 65

WARRANTY QUALIFICATION AND SERVICE ................................................................................. 66

Exclusions ........................................................................................................................................................................ 68

Limitations of Liability .................................................................................................................................................... 69

How to Obtain Warranty Service .................................................................................................................................... 70

Owner Registration ......................................................................................................................................................... 70

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Specific Requirements for the Common Wealth of Massachusetts

The information in this section applies to all installations performed in the Common Wealth of Massachusetts only.
For all side wall horizontally vented gas fueled equipment installed in every dwelling, building or structure used in whole or
in part for residential purposes and where the side wall exhaust vent termination is less than seven (7) feet above grade,
the following requirements shall be satisfied:

If there is no carbon monoxide detector with an alarm already installed in compliance with the most current edition
of NFPA 720, NFPA 70 and the Massachusetts State Building code in the residential unit served by the side wall horizon­tally vented gas fueled equipment, a battery operated carbon monoxide detector with an alarm shall be installed in compli­ance with the most current edition of NFPA 720. NFPA 70 and the Massachusetts State Building Code.

In addition to the above requirements, if there is not one already present, a carbon monoxide detector with an
alarm and a battery backup shall be installed and located in accordance with the installation requirements supplied with
the detector on the floor level where the gas equipment is installed. The carbon monoxide detector with an alarm shall
comply with 527 CMR, ANSI/UL 2034 Standards or CSA 6.19 and the most current edition of NFPA 720. In the event that
the requirements of this subdivision cannot be met at the time of the completion of the installation of the equipment, the
installer shall have a period of thirty (30) days to comply with this requirement; provided, however, that during said thirty
(30) day period, a battery operated carbon monoxide detector with an alarm shall be installed in compliance with the most
current edition of NFPA 720, NFPA 70 and the Massachusetts State Building Code. In the event that the side wall hori­zontally vented gas fueled equipment is installed in a crawl space or an attic, the carbon monoxide detector may be in­stalled on the next adjacent habitable floor level. Such detector may be a battery operated carbon monoxide detector with
an alarm and shall be installed in compliance with the most current edition of NFPA 720, NFPA 70 and the Massachusetts
State Building Code.

A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum
height of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled
heating appliance or equipment. The sign shall read, in print size no less than one-half (1/2) inch in size, “GAS VENT
DIRECTLY BELOW, KEEP CLEAR OF ALL OBSTRUCTIONS”

A final inspection by the state or local gas inspector of the side wall horizontally vented equipment shall not be
performed until proof is provided that the state or local electrical inspector having jurisdiction has granted a permit for in­stallation of carbon monoxide detectors and alarms as required above.
(b) EXEMPTIONS: The following equipment is exempt from 248 CMR 5.08(2) (a) 1 through 4:

1. The equipment listed in Chapter 10 entitled “Equipment Not Required To Be Vented” in the most current edi-

tion of NFPA 54 as adopted by the Board; and

2. Product Approved side wall horizontally vented gas fueled equipment installed in a room or structure separate

from the dwelling, building or structure used in whole or in part for residential purposes.

(c) When the manufacturer of Product Approved side wall horizontally vented gas equipment provides a
venting system design or venting system components with the equipment, the instructions for installation of the equipment
and the venting system shall include:

1. A complete parts list for the venting system design or venting system; and

2. Detailed instructions for the installation of the venting system design or the venting system components.

(d) When the manufacturer of a Product Approved side wall horizontally vented gas fueled equipment does not
provide the parts for venting the flue gases, but identifies “special venting systems”, the following shall be satisfied:

1. The referenced “special venting system” instructions shall be included with the appliance or equipment installa-

tion instructions; and

2. The “special venting systems” shall be Product Approved by the Board, and the instructions for that system

shall include a parts list and detailed installation instructions.

(e) A copy of all installation instructions for all Product Approved side wall horizontally vented gas fueled
equipment, all venting instructions, all parts lists for venting instructions, and/or all venting design instructions shall remain
with the appliance or equipment at the completion of the installation.

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ML47 FULL VIEW GAS FIREPLACE DIMENSIONS

OVERALL APPLIANCE DIMENSIONS AND FEATURES

Removable Cover Plate for Plumbing & Electrical
Access before unit is placed inside framed cavity.
Replace Lower Cover Plate before sliding unit into
framed cavity.

Lower Cover Plate

Upper Cover Plate

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ML47 FEATURES - QUICK REFERENCE INFORMATION
CERTIFICATION and LISTING: Certified under ANSI Z21.88 (2014) • CSA 2.23 (2014) “Vented Gas Fireplace Heater "

not for use with solid fuel. Not to be used as primary heat source.

EFFICIENCY RATINGS: P.4 Fireplace Efficiency 71.3%. AFUE Natural Gas 70%, AFUE LP Gas 70.7%
EXTERNAL DIMENSIONS: 54-1/4” Wide X 39” High X 19-1/2” Deep
GLASS SIZE: NeoCeram Glass with non-reflective coating. Visible Glass measures 45” X 14-1/2”. Visible Glass Area

equals 652.5 in2. Actual Glass size is 46-3/16” X 15-9/16”.

MINIMUM FIREPLACE FRAMING DIMENSIONS REQUIREMENT: 54-1/4 Wide X 39” High X 19-1/2” Deep
FRAMING MATERIALS REQUIREMENT: Minimum 2X4 Lumber
HEARTH PROTECTION PAD: NOT REQUIRED: Glass bottom edge is raised 9-1/2” within appliance body.
ELECTRICAL SUPPLY REQUIREMENT: 120 VAC, 5 Amps. Unswitched. Junction Box provided inside appliance.
VENT SYSTEM REQUIRMENTS: 5”x8” Coaxial Rigid Vent System. MINIMUM INITIAL VERTICAL RISE REQUIRED IS

18” for Natural Gas and 24” for LP Gas. Maximum Horizontal Vent Length with the Minimum Vertical Starter Section
equals 6”. Maximum Horizontal Vent run with 4 feet Vertical starter section connection equals 32 feet for NG and 27 feet
for LPG.. Maximum Vertical vent run equals 42 feet.

MANTEL ALLOWANCE: 8” Deep Mantel at 12” Above Top Convection Opening .Use the Approved Mantel Profile Chart.
VENT DAMPER ADJUSTMENT AVAILABLE: A single Disc Damper is available for exhaust flow adjustments.
CONTROLS: IPI Electronic Ignition System with AC Primary Power and DC Backup Power. Remote Control included.

Accent Light operates on AC Power only.
BLOWER SYSTEM: Optional 210 CFM Dual Blower System. 120VAC, 2 Amps. Dedicated Hot Power only. No switches,

Fan Speed Controls or Light Dimmers are allowed in the same AC supply circuit. Optional fans are controlled using re­mote control.

ACCENT LIGHT SYSTEM: Dual Accent Light System Included. Light can be turned on or off and dimmed from remote
control.

BURNER SYSTEM: Single Ceramic Plaque Array burner.
BURNER SHUTTER SYSTEM: Manually controllable internal rotary Burner air shutter.
BURNER MEDIA OPTIONS: Must install one burner media. Driftwood Logs set with Natural Rocks, Twig Set with coals,

Natural Rock Set, Black Shades Rock Set, Diamond Clear Glass Pieces, Diamond Shape Black Glass Pieces, Round
Clear Glass, and Round Black Glass. Multiple Media types may be combined together..

FIREBOX INNER LINING PANELS: Black Enamel, Midnight Metallic Enamel, Metallic Mocha Enamel, Metallic Silver
Enamel and Copper Enamel Panoramic options available. Each Firebox Panoramic Liner is supplied with matching Fire­box Floor Panel. One Firebox Inner Liner Kit must be installed before any use.

NATURAL GAS INFORMATION: Factory equipped for Natural Gas. 5”WC Minimum inlet pressure required. For NG ap-

plications, Burner Orifice Size is 1/8”.
LPG INFORMATION: LP conversion kit #HA-90-00110 is an available option. 11”WC Minimum inlet pressure required.

CAUTION

THESE INSTRUCTIONS ARE TO

REMAIN WITH THE HOMEOWNER.

NOTE: This installation must conform to local codes. In the absence of
local codes, you must comply with the National Fuel Gas Code, ANSI
Z223.1-latest edition in the U.S.A. and the Natural Gas and Propane
Installation Code, CSA B149 Installation Codes in Canada.

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(s)
of gas indicated on the rating plate.

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TECHNICAL SPECIFICATIONS FOR ML47 LINEAR ZC DECORATIVE FIREPLACE

MODEL ML47
High Fire - Adjustable to - Low Fire
BTUH. (MODEL ML47) NAT. GAS 41,000 25,000
BTUH. (MODEL ML47) LP GAS 41,000 24,000

NOTE: LPG CONVERSION KIT, #HA-90-00110 MUST BE PURCHASED SEPARATELY TO CONVERT TO BURN LPG
IN THIS FIREPLACE.

MAIN ORIFICE [0-2000ft (610 m)]: 1/8” NG –: #49 LP
[2000-4500ft (610-1370 m)]: #31 NG - #50 L.P.
OVERALL EFFICIENCY: [P.4: 71.3% NG, 70% LPG]
CO-AXIAL DIRECT VENT FLUE: 5" INNER, 8" OUTER, RIGID
TOTAL WEIGHT: 325 POUNDS
SAFETY: AGA/CECERTIFIED IPI AUTO ELECTRONIC IGNITION SYSTEM
ACTIVATED WITH REMOTE CONTROL.

APPLIANCE CERTIFICATION AND TESTING AGENCY

INTERTEK TESTING SERVICES, ICBO#AA647-4
Certified under ANSI Z21.88 (2014) • CSA 2.23 (2014) “Vented Gas Fireplace " not for use with solid fuel. Approved for
bedroom installations and mobile homes. UL307B approved for "mobile homes, after first sale of home, not for recrea­tional vehicles."
GAS REQUIREMENTS SUPPLY PRESSURE: GAS INLET: 1/2" N.P.T.
NAT. GAS: 7" W.C. (5" W.C. MIIN., 11" W.C. MAX.)
L.P. GAS: 11.0" W.C. (12" W.C. MIN., 13" W.C. MAX.)

ELECTRICAL REQUIREMENTS 115 VOLT, LESS THAN 1.5 amps (6V DC BACKUP POWER SUPPLY)
APPROVED VENT SYSTEMS DURAVENT, SELKIRK, AMERIVENT, SECURITY, BDM

MINIMUM CLEARANCES TO COMBUSTIBLE CONSTRUCTION

UNIT TO FLOOR 0in. (0mm) GLASS EDGE TO ADJACENT SIDEWALL 16in. (406 mm)
UNIT TO ENCLOSURE SIDEWALL 1/2in. (13mm) VENT PIPE TOP TO COMBUSTIBLES 3in. (76mm)
UNIT TO ENCLOSURE BACK WALL 1/2in. (13mm) VENT PIPE SIDES TO COMBUSTIBLES 1in. (25mm)
UNIT BOTTOM TO ENCLOSURE CEILING 44-3/16in. (1122 mm) VENT PIPE BOTTOM TO COMBUSTIBLES 1in. (25mm)

UNIT BOTTOM TO ROOM CEILING 60 in. (1524 mm) 8” MANTLE ABOVE DISCHARGE AIR OPENING 12 in. (304 mm)

MINIMUM COMBUSTIBLE ROUGH FRAMING DIMENSIONS

WIDTH = 54-1/4” (138 cm) HEIGHT = 39” (99.6 cm) DEPTH = 19-1/2” (49.5 cm)

THIS FIREPLACE INCLUDES A SEALED COMBUSTION SYSTEM, NEO-CERAM GLASS, ELECTRONIC IGNITION SYSTEM, AGA CERTIFIED
SAFETY SYSTEM, DUAL ACCENT LIGHTS and REMOTE CONTROL.
OPTIONS: BLACK, VINTAGE IRON, SWEDISH NICKEL, ANTIQUE GOLD, ANTIQUE COPPER GRACE, TRADITIONS AND WILLOW BROOK TRIM
KITS. Burner Media Options include Driftwood, Twig Set and many colored and clear glass bead burner media, Natural Rocks Kit.

WARNING: Do not operate this appliance with the
glass removed, cracked or broken. A licensed or
qualified person should do replacement of glass.

Derating at altitudes above 2000 feet: Installation of this ap-

pliance at altitudes above 2000 feet requires the gas input to be
derated by reducing the main burner orifice size. For NG and
LPG applications, the main burner orifice size for altitudes

above 2000 feet shall be 1/8” and #49, respectively. LPG gas

input rate for installation above 2000 feet shall be 40,000
Btu/Hr.

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CONGRATULATIONS

You are the owner of a world-class modern gas direct vent sealed combustion fireplace.
This elegant, highly efficient Fireplace will be a constant source of comfort and fascination. It will be the focal point of

beauty and interest in your home.
This Mendota Gas Fireplace is an appliance incorporating modern aesthetics of fire viewing. Of particular interest is the

low fuel consumption and brilliant fire viewing afforded by the latest technology combustion system.
Carefully read the following instructions prior to actual installation. Proper Mendota Gas Fireplace installation and opera-

tion will give you years of safe, trouble free comfort and enjoyment.
If you have any questions regarding installation or operation of your Mendota Fireplace please contact your local dealer.
...CAUTION...
Due to high temperatures, the Fireplace should be located out of traffic and away from furniture and draperies. Children

and adults should be alerted to the hazards of high surface temperature and should stay away to avoid burns or clothing
ignition. Young children should be carefully supervised when they are in the same room as the Mendota Gas Fireplace.

Clothing or other flammable material should not be placed on or near the Fireplace.
Any safety screen or guard removed for servicing an appliance must be replaced prior to operating this appliance.
The Mendota Gas Fireplace, although certified and listed as a Decorative Gas Appliance, operates at 67% Steady State

Efficiency (71.3% Fireplace Efficiency, P.4) and can be a source of supplemental heat with heat output equal to 29,200
Btu/Hr..

Installation, repair and any adjustments to logs or burner must 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, carbon build-up, etc. It is imperative that control compart­ments, burners and circulating air passageways of the appliance be kept clean. The burner and pilot flames and logs
should be visually checked periodically.

DO NOT use this appliance if any part has been under water or exposed to moisture corrosion. Immediately call a quali­fied service technician to inspect the Fireplace and replace any part of the control system and any gas control, which has
been under water. DO NOT use this fireplace if the burner does not light immediately. Turn unit off and call Mendota ap­proved service person if there is any delay in burner light off.

It is Johnson Gas Appliance Company's policy that no responsibility is assumed by the Company or by any of its employ­ees or representatives for any damages caused by an inoperable, inadequate, or unsafe condition which is the result, ei­ther directly or indirectly, of any improper operation, installation or servicing procedures.

Building Permit and Installation Inspection Approval Requirements

All installations of Mendota Fireplaces and Inserts must comply with all the requirements stated in this Installation and
Operating Instructions Manual. The Dealer and/or installer must also obtain all required Building Permits and Inspection
Approval from the local building inspection department or the local body having jurisdiction. In order to validate warranty
coverage, Mendota may require facsimile copies of the Building Permit and Inspection Approval forms. Failure to provide
adequate proof that the installation conforms to all local requirements and the requirements stated in the Installation and
Operating Instructions Manual will void all applicable warranty.

INSTALLER: THESE INSTRUCTIONS ARE TO REMAIN WITH HOMEOWNER.

HIGH ALTITUDE INSTALLATION INFORMATION: Prior to installing at altitudes higher than 7500, please con­tact the Mendota technical service department for specific venting requirements and venting restrictions.

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ML47-M DIRECT VENT GAS FIREPLACE

GENERAL APPLIANCE SPECIFICATIONS
HIGH ALTITUDE INSTALLATION INFORMATION: Prior to installing at altitudes higher than 7500, please contact the

Mendota technical service department for specific venting requirements and venting restrictions.

MINIMUM ROUGH FRAMING DIMENSIONS

WIDTH (IN)

HEIGHT(IN)

DEPTH (IN)

54-1/4

39”

19-1/2

89-9/16

44-3/4

63-5/16

63-5/16

23-5/8

23-5/8

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MANTEL CLEARANCES

Mantel Clearances for this fireplace may be measured from the top of the convection air opening or the floor level of this
fireplace.

The location that is referenced normally to measure mantel clearances is the Top of the Convection Air Opening. For ease,
however, measure up from the floor level of this fireplace. The chart and diagram, in this page, provide all the refer- ence
dimensional information necessary in determining the distance a combustible mantel may protrude out from the face sur­face of this fireplace. The chart shows the distance from the Fireplace Face the combustible mantel may pro- trude out­ward at a distance up from the Floor Level of this Fireplace.

If you prefer to take measurements from the Top of the Convection Air Opening, note that the Top of the convection
air opening is 25 - 1/16 inches up from the floor level of this fireplace.

WARNING: Make proper use of this chart. Do not compromise the specifications contained in this chart. Failure to adhere
to proper clearances required to combustibles may cause spontaneous combustion of the mantel and may result in a
fire causing property damage, personal injury or loss of life.

NOTE: For mantels that protrude more than 8 inches from the front surface of the fireplace use a rise and run of (1:1) to
calculate the required height of the mantel.

EXAMPLE: You have a 12" mantel.

To calculate the height above the convection air opening the equation would be:
12" x (1/1) + 4" = 16" above the convection air opening.

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CLEARANCES TO COMBUSTIBLES FROM APPLIANCE SURFACES

CLEARANCE TO SIDE WALL PROJECTIONS

Any side wall adjacent to Left or Right side of this appliance protruding out more 16" in from of the front surface of the visi­ble glass door and if perpendicular to the front surface of the glass door must be located a minimum of 16" from the side
edge of the visible glass door.

Figure 1: Clearances to Combustibles

1/2" CLEARANCE

FROM BACK

0" CLEARANCE FROM

TOP STANDOFFS

1/2" CLEARANCE

FROM SIDES

16" MINIMUM TO SIDE WALL
FROM SIDE EDGE OF VISIBLE
GLASS

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85-03-00923 ML47

PLANNING THE INSTALLATION

When planning on appliance installation, it is necessary to determine the following information before installing:

• Where the appliance is to be installed.

• The vent system configuration to be used.

• Gas supply piping.

• Electrical Wiring.

• Framing and finishing details.

• Hearth Protection Pad Requirements.

• Whether accessories such as a wall switch, remote control, and ceiling fan are desired.

Selecting Appliance Location

When selecting a location for your appliance, it is important to consider the required clearances to adjacent side walls.

Figure 2: Planning Installation

WARNING
FIRE RISK- ODOR RISK

• Do NOT install this fireplace directly on carpeting, vinyl or any combustible material other than wood. Con-
struct chase to all clearance specifications in manual.

• Locate and install appliance to all clearance specifications in manual.

• ODOR RISK: DO NOT INSTALL ANY CEMENT BOARDS OF OTHER MATERIALS THAT CONTAIN

POLYMER BASED FIBERS OR OTHER POLYMER MATERIALS.

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85-03-00923 ML47

ROUGH FRAMING DIMENSIONS

Rough Framing Dimensions
The Rough Framing Dimensions must be main­tained to allow this fireplace to slide into the
framing cavity.
If the fireplace is to be recessed in a cavity
deeper than 19-1/2”, all framing and finishing
materials protruding past the front face of this
fireplace must be of the NON-COMBUSTIBLE variety.

Constructing the Appliance Chase

A chase is a vertical box-like structure built to enclose this fireplace and its vent system. Vertical vents that run on the
outside of a building may be, but are not required to be, installed inside a chase.

Construction of the chase may vary with the type of building. These instructions are not substitutes for the requirements of
local building codes. Local building codes MUST be adhered to.

Chases should be constructed in the manner of all outside walls of the home to prevent cold air drafting problems. The
chase should not break the outside building envelope in any manner.

Wall, ceiling, base plate and cantilever floor of the chase should be insulated. Vapor and air infiltration barriers should be
installed in the chase as per regional codes for the rest of the home. Additionally, in regions where cold air infiltration may
be an issue, the inside surfaces of the chase may be sheet rocked and taped for maximum air tightness.

To further prevent drafts, the fire stops should be caulked with high temperature caulk to seal the gaps. Gas line holes
and other openings should be caulked with high temp caulk or stuffed with unfaced insulation. If the appliance is being
installed on a cement slab, a layer of plywood may be placed underneath this fireplace to prevent conducting cold up into
the room.

Minimum Rough Framing Dimensions

DESCRIPTION

DIMENSION (INCHES)

A

Width

54-1/4

B

Height

39” C Depth

19-1/2” (19” Granite/Marble Facing)

D

Vent opening height

10-3/4”

E

Vent opening width

10-3/4”

Figure 3: FINALIZED Framing Dimensions

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85-03-00923 ML47

FRAMING DEPTH and FINISHING GUIDES

The general framing depth for this fireplace is 19-1/2 inches. See details about using the Adjustable Framing Bracket, be­low for flexibility for framing depths.

For installing solid Granite or Marble slabs as fascia material, reduce the framing depth by ½” then install ½” thick drywall

on the framing studs so that the drywall is flush with the front face of this fireplace. Install the Granite or Marble slab so
that it adheres to the face of the fireplace and the drywall.

Adjustable Framing Brackets (Sides, Top and Bottom): defined as Metal Brackets which are secured to the front outer
perimeter of the ML-47 body and have adjustable slots to move inward to reduce the rough framing depth by the thickness
of the Finishing Material base Substrate. To adjust, loosen securing screws and slide brackets backwards.

Inner Guide: defined as the flat metal guides supplied with the ML-47 which are located at the outer perimeter of the con­vection air gap around the glass frame. These act as temporary guides and are to be used to position the finishing mate-

rial’s edges adjacent to the top, sides and bottom convection air gap around the glass frame. Use the Inner Guide if you

installing only the Traditions or Willowbrook Front or if you wish to install the Grace Front on top of your final finishing ma­terial.

Outer Guide (not shown): defined as the bent metal guides which are designed to be used as the inner edge of final fin­ishing material bordering the outer edge of the Grace Decorative Front. The Outer Guide should be used if you desire the
final finishing material thickness to be deeper than 2” thick or if you wish the Grace Decorative Front to be recessed closer
to the viewing glass surface. If Outer Guides are required, order part number HA-90-00030 from your Mendota Dealer.

Finishing Material base Substrate: defined as any non-combustible materials (which are required in the non-combus­tible materials only allowed zones of this fireplace) or drywall boards (normally used in combustible material allowed
zones) which is secured to the rough frame members and act as the inner substrate that the final finishing material is ad­hered to.

Final Finishing Material: defined as any non-combustible finishing material such as polished granite or marble, ceramic
tiles, faux rock, brick or others.

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85-03-00923 ML47

Adjustable Framing Brackets

The ML-47 model is factory equipped with Top, Sides and Bottom adjustable framing brackets. These parts can slide
backwards the thickness of the Finishing Material base substrate such as Durock, Hardibacker (in non-combustible
zones) or Drywall board (in combustible material allowed zones). The framing depth shall be reduced by the thickness of
the Finishing Material base.

What is the core purpose and end benefit of the adjustable/sliding Top, Sides and Bottom Framing Brackets?

Adjusting the adjustable Top, Sides and Bottom framing brackets backwards equal to the thickness of the Finishing Ma­terial base Substrate results in only the thickness of the final finishing material protruding out from the face of the ML-47

unit. Doing this allows you to remove and discard the Inner Guides if installing tiles with metallic tile edging strips or if in­stalling the Grace Front on top of the Final Finish Material. The Grace mounting brackets allow in/out adjustment for final
finish material thickness of up to 2 inches.

How is the Rough Framing Depth of ML-47 affected if you adjust the Outer Framing Brackets?

1. The nominal rough framing depth for the ML-47 remains at 19-1/2”. You may slide the Outer Framing Bracket
backwards to reduce the rough framing depth by the same amount from 19-1/2”. Example: If you slide the Outer
Framing Brackets backwards ½”, then the required rough framing depth will be 19-½” – ½”= 19”.

What do these adjustable Outer Framing Brackets parts affect?

1. The adjustable outer edge metal parts eliminate the need for the Minimum 1” thick finishing material thickness
originally stated under “FINISHING MATERIAL INSTALLATION”, Page 15, of the Installation and Operating In-

structions Manual supplied with the ML-47 fireplace.

2. If you reposition the Outer Adjustable Framing Brackets, you should remove and discard the Inner Guides. In­stead, use metallic tile edging strips, available at home improvement stores in various shapes and colors. Never
use polymeric (plastic) tile edging strips.

FINISHING MATERIALS INSTALLATION

All finishing materials that surround this fireplace’s rectangle profile must extend out from the face surface of this fireplace
1 inch if the 19-1/2” framing depth is used and the Inner or Outer Finishing Guides are utlizied. A MAXIMUM THICKNESS

OF 2” OF FINISHING MATERIAL IS ALLOWED OVER THE FACE OF THE UNIT WHEN USING THE INNER GUIDES
ONLY! If you wish to install finishing materials in thickness greater than 2” with the Grace Front, use outer guides.

Tiles and Faux Rock

If installing Tiles or Faux Rock, first install a ½” thick (minimum) Cement Board (Hardibacker or Durock Brand) over the

face of the fireplace and framing members. Follow by applying ThinSet mortar (no polymer additives) using ¼” square
notched trowel on the cement board surface. Finally, install tile to reach a finish material depth of 1 inch.

WARNING OF ODOR RISK: Cement Boards used shall not contain any polymer based fibers or polymer materials. Thin­Set mortar with polymer additives is not allowed. If in doubt, use RTV 500oF rated high temperature silicone to adhere tile,
granite or marble to the face of unit. Always apply the silicone in 1/8” wide beads in spline shape vertical lines only. Allow
at least 24 hours to for the silicone to cure before firing this fireplace.

Marble and Granite Slabs

If installing Marble or Granite slabs as fascia materials, specify that the inner edges that will be adjacent to the Glass Door

are polished. Rough Framing should be created at 19” depth with the front surface of this fireplace protruding out ½” from

the framing surface.
Install 1/2'” thick drywall on framing members so that its outer surface is flush with the front face of this fireplace. Attach

Marble or Granite slabs to face of unit and to drywall surface using adhesive that does not off gas when hot. Mendota rec­ommends the use of Copper RTV Silicone as the adhesive applied in thin 1/8 beads of spline shapes. NEVER place large
globs of any adhesive or Copper RTV Silicone between two faces. Doing so will cause odor issue for long periods of time
after installation is completed.

In the area defined as “NONCOMBUSTIBLE ZONE” [FIGURE 7], only NONCOMBUSTIBLE MATERIALS ARE

ALLOWED. DO NOT INSTALL DRYWALL OVER THE NONCOMBUSTIBLE ZONE.

WARNING OF ODOR RISK

Cement Boards used shall NOT contain any polymer based fibers or polymer materials. ThinSet mortar used

shall not contain any polymer additives.

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85-03-00923 ML47

Decorative Fronts Information:

No Front: The ML47 Fireplace can be installed without a decorative front. If the Fireplace is installed without a decorative
front ML47 Safety Barrier Part#: AA-11-01100 must be installed on the Fireplace before operation.

Traditions Front Only: The Traditions Front is approximately the overall size of the viewing glass frame. This Front
mounts using steel barrel nuts on the outer sides of the viewing glass frame. The bracket attached to the Traditions Frame
allows you to pull the Traditions outward in incremental steps up to 1”, maximum. The Traditions Front can be close to the
glass frame or away from the glass frame. This front comes with a screen and is a conforming safety barrier.

For the Traditions Front, use the inner guides or use your selection of Metallic tile edging.

Willowbrook Front Only: The Willowbrook Front is, approximately, the overall size of the viewing glass frame. This
Front mounts using steel barrel nuts on the outer sides of the viewing glass frame. The bracket attached to the Willow­brook Frame allows you to pull the Willowbrook outward in incremental steps up to 1”, maximum. This front comes with a
screen and is a conforming safety barrier.

For the Willowbrook Front, use the inner guides or use your selection of Metallic tile edging.

TRADITIONS

WILLOWBROOK

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85-03-00923 ML47

Grace Front Only: The Grace Front’s inner edges start outside the convection air gaps around the viewing glass frame.
This Front is mounted using steel spacers and screws on the outer sides of the convection air gap on the sides of the
viewing glass frame. The bracket attached to the Grace Frame allows you to pull the Grace outward in incremental steps
up to 2”, maximum. The Grace Front can be mounted close to the steel face of this fireplace if the Outer Guides are used
and are applicable in the installation plan. If Final Finishing material is desired behind the Grace Front, use the Inner
Guides and adjust the rough framing depth and the Outer Adjustable Framing Brackets. With Final Finishing Material
mounted behind the Grace by using the inner guides, the Grace can be mounted only as close as the Final Finishing Ma­terial thickness allows. This front comes with a screen and is a conforming safety barrier.

Grace Front with a Traditions Front or Willowbrook Front combination: A Traditions or Willowbrook Front can be

mounted along with a Grace Front. First determine the desired depth perspective. Do you want the Grace Front Face
close to the Traditions Face or Willowbrook Face? Do you want the Final Finishing Material behind the Grace Front or do
you wish to use the Outside Guides which hold the Final Finishing Material outside the outer perimeter of the Grace
Front? When installing a Grace Front with a Traditions or Willowbrook Front the screen of the Grace Front may be re-

moved.

GRACE

GRACE WITH

TRADITIONS

PAGE 20

85-03-00923 ML47

Final Finishing Material mounted behind the Grace Front, using the Inner Guides:
If the Final Finishing Material is mounted behind the Grace Front and you wish the front visible faces of the Grace Front

and the Traditions or Willowbrook to be close to each other, you have one option:

1. Remove the Glass Safety Screen that is integrated on the back surface of the Grace Front. Mount the Grace

Front inward as far back as allowed by the Final Finish Material thickness. Mount the Traditions or Willow-

brook Front at the desired depth relative to the Grace Front. Note that the Traditions or Willowbrook Front’s
visible face can be made flush with the Grace Front’s visible surface if the Final Finishing Material is less than
¾” and the Adjustable Framing Brackets are employed properly.

NON-COMBUSTIBLE FINISHING MATERIALS REQUIREMENTS

WARNING: The cross hatched areas labeled as “NONCOMBUSTIBLE ZONE” must be covered with noncombustible fin­ishing materials that is 1-inch thick, minimum. DO NOT ALLOW COMBUSTIBLE MATERIALS TO ENCROACH IN THIS
AREA!

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85-03-00923 ML47

RAISED HEIGHT INSTALLATION OF ML47

The ML47 Linear Gas Fireplace may be installed in an elevated configuration. Please consult the table, below to deter­mine the maximum raised height allowable based on the internal ceiling height of the room this Fireplace is installed in.

Room Ceil-

ing Height

[DIM C]

MAXIMUM

Distance from Floor to

ML47 Bottom Surface

[DIM A]

MAXIMUM

Distance from Floor to

ML47 Visible Glass Bot-

tom Edge [DIM B]

LIMITATIONS

**MUST BE ADHERED TO**

84”

15”

24-3/16”

LIMITED by Clearance to Soffit. Use

metal shield on soffit if you cannot con-

form.

96”

27”

36-3/16”

LIMITED by Clearance to Soffit. Use

metal shield on soffit if you cannot con-

form.

108”

39”

48-3/16

LIMITED by Clearance to Soffit. Use

metal shield on soffit if you cannot con-

form.

120”

51”

60-3/16”

LIMITED by Clearance to Soffit. Use

metal shield on soffit if you cannot con-

form.

If this fireplace is elevated high enough beyond the maximum on the table, above, you will be required to use a sheet
metal shield which is mounted on the soffit directly above the vent cap spanning 36” wide centered over the vent cap and
spanning the full depth of the soffit, spaced 1” down from the soffit surface using tubular spacers or stacked washers. This
metal shield allows you to lower the clearance between Vent Cap Center and the metal shield to 12”.
The ML47 Linear Fireplace may be installed directly on wood floor or any non-combustible solid flooring, except carpet
and vinyl. The bottom edge of the visible glass will be located 9-3/16” up from the floor level in this configuration.

Mendota recommends that the ML47 be installed on an elevated wood framed support stand of at least 15” tall which will
result in the bottom edge of the visible glass locating at 24” above the floor level of the room.

How to determine the proper installed height of this fireplace:

Determine how individuals spend their time in the room this fireplace is to be installed. If time is spent mostly sitting on a
chair or sofa, determine the eye level height of the shortest individual while this individual is sitting in the chair or sofa.
Subtract 10” from the eye level height. This is the recommended height for the bottom edge of the visible glass.

This recommendation is strictly cosmetic and is not required to be adhered to.

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85-03-00923 ML47

RECOMMENDATIONS FOR TELEVISION INSTALLATION
Note: The model depicted in the images is a representation of a Mendota Hearth fireplace. These recommendations ap-

ply to all Mendota Hearth Fireplaces.
When planning to install a television or other heat sensitive product above your fireplace, there are some points to con-

sider.
Many television manufacturers specify in their installation instructions that the television must not be installed near or

above a heat source. The decision to install a television near or above a Mendota fireplace rests solely on the consumer.
It is the consumers responsibility to satisfy television specifications and insure the television will not exceed maximum
operation temperatures. Mendota Hearth will not be held liable for any adverse effects on a television or other products
located near to a Mendota Hearth fireplace.

The drawings below show recommendations that may be used as a guide for those consumers that decide to locate a
television above a Mendota Hearth fireplace. These recommendations have been found to reduce the heat impact to a
television when installed above a Mendota Hearth fireplace.

Recommendation 1: Add a mantel

Add a mantel above the fireplace. The mantel shall be at least 2 inches deeper than the depth of the television, and at
least as wide as the television. The mantel shall be mounted so that its top surface is a minimum of 18 inches above the
top air gap of the fireplace.

Attention: If the mantel is constructed of combustible materials, make certain that the entire mantel meets the clearances
to combustible mantel requirements.

PAGE 23

85-03-00923 ML47

Recommendation 2: Create a recessed cavity

Frame a recessed cavity above the fireplace. The cavity shall be at least 6 inches taller and 6 inches wider than the televi­sion. The cavity’s bottom surface must be a minimum of 24 inches above the top air gap of this fireplace. The cavity must
be deep enough for the television to be recessed at least 2 inches in from the wall.

Recommendation 3: Install a heat transfer system

Mendota Hearth offers three heat transfer systems that take heat from the fireplace and redirect it to another area. When
used correctly these heat transfer systems can make it possible to mount a television above the fireplace without installing
a mantel or creating a recessed cavity.

Note: Heat transfer systems are not available for use on M27 model fireplaces.
WARNING: The convection fans on the fireplace must be turned off to insure the heat from the fireplace is redirected

through the heat transfer system. Turning the convection fans on will force heated air out the front of the fireplace, heating
the surrounding area.

- On fireplaces with a millivolt system: DXV35 Timberfire, DXV42, DXV60, M50 the convection fans must be dis-
connected from power to insure they cannot be turned on.

- On fireplaces with electronic ignition system that come with a PF2 remote the convection fans function must be
programed out of the remote. This will ensure that the convection fans cannot be turned on. Follow the directions
below to remove the convection fans function from the remote.

PAGE 24

85-03-00923 ML47

1. Remove a battery from the remote.

2. Hold down both the ON/OFF key and MODE key
and reinstall the battery.

3. Continue to hold the ON/OFF key. Release the
MODE key. Press the MODE key once to high­light the convection fan function.

4. While still holding the ON/OFF key press the
DOWN ARROW key. The display will change

from “Set” to “Clr” to indicate that the convection

fan function has been disabled.

5. Release the ON/OFF key.

Mendota Cool Wall

The Mendota Cool Wall system uses natural convection to take heat off the wall directly above the fireplace and redirects
it up and away from surrounding areas. Testing has shown that when using a Cool Wall system, temperatures above the
fireplace are reduced making it possible to mount a television 15” above the fireplace’s top air gap.

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85-03-00923 ML47

Versiheat

The Versiheat system uses a fan to redirect heat from the fireplace to an alternate room in the home.
WARNING: To reduce temperatures above the fireplace for mounting a television the Versiheat system must always be
on when the fireplace is in operation. Because the Versiheat system must be running to reduce temperatures the fireplace
cannot be operated during a power outage.
Testing has shown that when using two Versiheat systems temperatures above the fireplace are reduced making it possi­ble to mount a television 15” above the fireplace’s top air gap.

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85-03-00923 ML47

FlexHeat

The FlexHeat system uses two inline fans to redirect heat from the fireplace outside the home or to an alternate room in
the home.
WARNING: To reduce temperatures above the fireplace for mounting a television the FlexHeat system must always be on
when the fireplace is in operation. Because the FLexHeat system must be running to reduce temperatures the fireplace
cannot be operated during a power outage.
Testing has shown that when using the FlexHeat system temperatures above the fireplace are reduced making it possible
to mount a television 12” above the fireplace’s top air gap.

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85-03-00923 ML47

BACKUP DC POWER INLET PORT INSTALLATION

Under normal conditions when AC power is available, this appliance is designed to operate on 110 VAC power. During
power outages, it is designed to operate using 6 V DC backup power. This appliance is supplied with a DC power inlet
harness, a single gang outlet box and two single cover plates. In addition, a 4 X AA size battery pack and a connector
harness is also supplied.
INSTALLATION: It is important that you install the supplied harness, outlet box and cover plate on the left side of this ap­pliance. The DC Power Inlet harness is 6 feet long, allowing installation of the single gang box up to 4 feet to the left of
this appliance. Install the single gang box at a maximum height of 18” to the center of the box or match the mounting
height of this single gang box with the height of other AC outlets that are installed in the same room as this appliance.
WARNING: DO NOT STAPLE the 6’ DC Power Inlet Harness to the wall studs.

COVER PLATES: Two cover plates are supplied and are White and Beige in color. If the home décor requires a different
color other than the two supplied colors, obtain one from a local hardware store. Make certain that the cover you obtain is
exactly the same dimensions as the ones supplied with this fireplace.

DECAL INSTALLATION: A notification decal
(label) is supplied with this fireplace that aids in
identifying the DC Power Inlet. Attach this label
to cover plate once installation is complete and
verified.
INSTRUCT HOMEOWNER: Demonstrate to the
homeowner how to attach the backup DC power
pack during power outages. Instruct homeowner
to retain the DC battery pack and the connecting
harness in a safe and secure place for use dur­ing power outages.

ATTACH DECAL
TO COVER PLATE.

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85-03-00923 ML47

GENERAL INFORMATION

Your Mendota Gas Fireplace has a state-of-the-art co-axial direct vent, sealed combustion system. This advanced com­bustion system brings in outside air for combustion and directly exhausts through an exhaust vent. The Mendota system
maintains high air quality and assures proper operation in today's "air-tight" homes.

Accessing gas valve train and electrical junction box during initial installation

To gain access, prior to placing this fireplace in a framed chase,
to make the gas supply connection, to install LPG conversion kit,
to check for gas leaks and to make initial electrical supply con­nection, remove the bottom two cover plates as shown, below.

Make certain the lowest cover plate is reinstalled before this
fireplace is placed in the framed chase.

SAFETY AND STRUCTURAL CONCERNS:

The ML47 Fireplace must be installed and serviced by a Men­dota approved serviceperson. Any adjustments to burner, pilot
and burner media must be made by a Mendota approved service
person. If pilot goes out, always wait five (5) minutes before at­tempting to relight pilot.

VENTING REQUIREMENTS:

This Mendota Fireplace can be vented using any available brand DIRECT VENT coaxial pipe (5”X 8”) off the top. Use
only Mendota specified vents and vent caps when installing your fireplace. Closely follow venting locations, directions and
requirements. Observe the restrictions relating to vent position on exterior of home. Be sure all vent pipe sections are
fully twist-locked and leak-proof. Be sure 1000º Silicate Stove Sealant is used on the inner pipe joints of all Simpson Du­raVent pipe components and all adjustable pipe sections.
The Mendota Direct Vent Fireplace may be placed within 16 inches of adjacent sidewalls. The fireplace may be placed
directly on concrete or wood flooring. If the appliance is to be installed on carpeting, vinyl or other combustible material
other than wood flooring, the appliance shall be installed on a metal or wood panel placed on top of the flooring material
and extending the full width and depth of the appliance. An 8” combustible mantel may be installed at a minimum of 12"
above the heat outlet (37”) up from the floor level of this fireplace) and no more than 8" out from wall at that height. Non­combustible (marble, brick, stone, etc.) mantels can be installed at any desired height above the top convection air open­ing. Combustible Mantels of any depth with a sheet metal protector plate in its under-side may only be installed outside
the “NON-COMBUSTILBE ZONE” above the top convection air opening.
Never block off convection air openings or paths. Always use Mendota decorative fronts and Mendota approved vent sys­tems and vent caps.

HEARTH PROTECTION PAD: A non-combustible hearth protector is not required.
AESTHETIC CONSIDERATIONS

Burning or static fireplaces are a major aesthetic focus in any room. Locate your gas fireplace as you would a television
set. The Mendota Hearth Gas Fireplace will be a continuing source of comfort and fascination. Corner installations will
afford you the greatest potential for viewing in many rooms. This fireplace may be installed in an elevated position as long
as 72 in. minimum distance is provided between the floor level of this fireplace and the room’s ceiling surface.

ELECTRICAL REQUIREMENTS:

Electronic Ignition System and an Accent Light system are included in this Mendota Direct Vent Fireplace. These devices
require constant electrical power except during power outages. A 120-volt electrical service must be supplied at the fire­place location at the time of installation, on the left side of this fireplace. It must be electrically grounded in accordance
with local codes, or in their absence, with the current edition of the National Electric Code ANSI/NFPA 70. Use of a wall
switch control in the power supplied to this fireplace is NOT allowed.
Three loose wires are secured to a metal plate on the left side in the gas train cavity using a nylon wire tie. Cut the nylon
wire tie and use wire nuts to connect house power to the three color-coded loose wires. A junction box is not required
since the steel body of this appliance functions as a fire stop.

MANUAL GAS SHUTOFF VALVE INSTALLATION REQUIREMENT

Obtain a Manual Gas Shutoff Valve approved per local gas plumbing codes and install per local gas plumbing codes in
the specified location. Manual Shutoff Valve is not supplied with this product.

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85-03-00923 ML47

GAS SUPPLY REQUIREMENTS

Correct gas pressure and proper gas supply line sizing is imperative to the successful performance of your Mendota gas
fireplace. Be sure the gas supplier or plumber carefully checks for correct gas pressure and gas line sizing when in­stalling the fireplace.
It is critical to check for gas leaks when connecting gas line to the fireplace -- check with soap & water solution.
Gas Supply and Electrical Supply Inlets Locations
Be sure to install "approved" flex gas line with brass-to-brass fittings to prevent
gas leaks at connections.
Gas supply piping must include a drip leg to eliminate the possibility of contami­nants entering the gas train.
Adhere strictly to local and national codes for entire installation.
Correct gas pressure and proper gas supply line sizing is required.

GAS SUPPLY LINE SIZING

This Mendota Gas Fireplace comes equipped with a 1/2" N.P.T. Female inlet.
Gas supply piping can enter the Fireplace cabinet on the left or right side. Loca­tion of gas supply entry hole on each side is the same and is shown in the image
on the right >.
An approved manual shut-off ball valve or keyed valve, as required by local
codes must be installed at an accessible location. The appliance and its individ­ual shut-off valve must be disconnected from the gas supply piping system dur­ing any pressure testing of that system at test pressures in excess of ½ PSIG
(3.5 kPa).
The appliance must be isolated from the gas supply piping system by closing its
manual shut-off ball valve during any pressure testing of the gas supply piping
system at test pressures equal to or less than 1/2 PSIG (3.5 kPa).
A proper gas line diameter must be selected to run from the supply regulator to
the Fireplace. Refer to the following table for proper gas pipe diameters. Strictly
adhere to the correct pipe sizes.

PIPE LENGTH
(FEET)

SCHEDULE 40 PIPE
INSIDE DIA.

TUBING, TYPE L
OUTSIDE DIA.

NAT.

L.P.

NAT.

L.P.

0-10

1/2" (1.3 cm)

3/8" (1.0 cm)

1/2" (1.3 cm)

3/8" (1.0 cm)

10-40

1/2" (1.3 cm)

1/2" (1.3 cm)

5/8" (1.6 cm)

1/2" (1.3 cm)

40-100

1/2" (1.3 cm)

1/2" (1.3 cm)

3/4" (2.0 cm)

1/2" (1.3 cm)

100-150

3/4" (2.0 cm)

1/2" (1.3 cm)

7/8" (2.3 cm)

5/8" (1.6 cm)

150-200

3/4" (2.0 cm)

1/2" (1.3 cm)

7/8" (2.3 cm)

3/4" (2.0 cm)

NOTE: Some areas allow coated stainless steel (CSST), copper tubing or galvanized pipe - check with
local approval agencies and codes. NEVER use plastic pipe.

GAS PRESSURE CHECKING REQUIREMENTS

Inlet and manifold gas pressure checking taps are located on gas valve. Perform inlet and outlet pressure tests before
completing the facing installation. Remove front access panel to gain access to the valve test ports.
A qualified installer shall take pressure measurements at these ports to verify and set the correct inlet gas pressures dur­ing initial installation. Outlet gas pressures are factory-set and cannot be field adjusted.

NOTE: Check for gas leaks with soap and water solution on all factory joints and field installed joints during first firing of

this appliance.

GAS PRESSURE REQUIREMENTS

One of the main causes of operating problems with gas appliances can be improper gas pressure!
Problems such as changes in flame color or configuration, gas pilot or burner outages, intermittent operation, changes in
heat output, excessive burner noise, etc. are nearly always the result of changes in gas pressure or improper gas pres­sure at the time of the installation. The most important item to check during initial installation and the first thing to check
when problems occur are the input and output gas pressures!

WARNING: Never use any type of pipe thread sealants or compounds on the seats of flare or compression connections.

PAGE 30

85-03-00923 ML47

Gas is normally supplied to a residence at 1/2 PSI (13" - 15" W.C.) (3 KPA). A pressure regulator is then placed outside
the residence, near the gas meter, which drops this pressure to 7" W.C. (1.8 KPA) (Nat. Gas). This "inches to inches"
regulator is of adequate capacity to service the gas appliances (such as dryer, furnace, etc.). If this regulator's capacity is
not sufficient to add the Gas Fireplace, an additional "inches to inches" regulator must be installed for the Fireplace.
EXCEPTION: Some codes allow 2-PSI (1.4KPA) supplies to enter the residence, in which case "pounds to inches" regula­tors are used.
The following table provides information on correct gas pressure requirements. Be sure your gas supplier or plumber
carefully follows this table.
GAS PRESSURE REQUIREMENTS

NOTE: For altitudes above 2.000 feet some variations in air shutter settings may be required.
Figure 4:
Gas Valve Pressure Test Ports
Manifold pressure must be taken at the “OUTPUT PRESSURE" tap and inlet pressure at the "INLET PRESSURE" tap
with the burner operating by a qualified installer. Perform pressure tests prior to installing fascia material around this
fireplace.

DESIRED
INLET
PRESSURE

MINIMUM
INLET
PRESSURE

MAXIMUM
INLET
PRESSURE

MANIFOLD
OUTLET
PRESSURE

AIR SHUTTER
POSITION*

NATURAL GAS

7.0" W.C.
(1.75 kPa)

5.0" W.C.
(1.12 kPa)

11" W.C.
(2.61 kPa)

3.5" W.C.
(0.87 kPa)

0 - 1/8 " OPEN
(3 mm)

L.P. GAS

11.0" W.C.
(2.75 kPa)

11" W.C.
(2.75 kPa)

13.0" W.C.
(3.24 kPa)

10.0" W.C.
(2.5 kPa)

1/4" OPEN
MIN.
(5 mm)

PAGE 31

85-03-00923 ML47

GAS INPUT RATE VERICATION REQUIREMENTS
Natural Gas Applications Gas Input Rate Verification Procedures

Verify Main Orifice Size. The main orifice body has the orifice hole size stamped on it. NG orifice size shall be 1/8"
for 0-2000 feet elevation and #31 for elevations exceeding 2000 feet.
Verify that the Manifold Gas Pressure is within 3.5" WC +/- 1/8".
Once setup, read the main home gas supply meter reading.
Write the initial reading here >> Initial Gas Meter Reading _______________
Turn OFF all other appliances and their pilot flame in the home.
Run this appliance for a period of 30 minutes on maximum flame size. Turn off main burner and pilot flame.
Read the main home gas supply meter reading after the 30 minutes of burn time.
Write the reading here >> Final Gas Meter Reading _______________
Calculate the following:
FINAL GAS METER READING - INITIAL GAS METER READING...Subtract Initial Gas Meter from Final Gas
Meter Reading. This will yield the number of Therms used during the 30 minute burn time.
Multiply the result in Item 11 by 100,000.
Multiply the result in Item 12 by 2. Write down the Result here >>_________________
The result in item #13 shall be at least maximum Input Rate (41,000 Btu) for altitudes below 2000 Feet. For alti­tudes higher than 2000 feet, the result in item #13 shall be at least 40,000 Btu.

LPG Applications Gas Input Rate Verification Procedures

Verify Main Orifice Size. The main orifice body has the orifice hole size stamped on it. LPG orifice size shall be
#48 for 0-2000 feet elevation and #49 for elevations exceeding 2000 feet.
Verify that the Manifold Gas Pressure is within 3.5" WC +/- 1/8".

PAGE 32

85-03-00923 ML47

GENERAL INSTALLATION INSTRUCTIONS
CAUTION: Each installation must conform to all local, state and national codes. Refer to the national fuel gas code and

local zoning and code authorities for details on installation requirements. The Mendota Fireplace must be vented to the
outside in accordance with the latest edition of the National Fuel Gas Code. In the absence of local codes, the installation
must conform to the most current edition of the National Fuel Gas Code ANSI Z223.1, also known as NFPA 54. NOTE:
The Mendota ML47 Fireplace is approved for mobile home and bedroom installations.
The ML47-PF2 Fireplace must be installed by a qualified service person.
CAUTION: The Mendota ML47 Fireplace may be installed in a manufactured (mobile) home after the first sale of the
home. Manufactured home (mobile home) installation must conform with the Manufactured Home Construction and
Safety Standard, Title 24 CFR, Part 3280, or, when such a standard is not applicable, the Standard for Manufactured
Home Installations, ANSI A225.1/NFPA 501A, or CSA Z240.4-Gas Equipped Mobile Housing. Consult your local building
official. Note: For mobile home installations unit must be bolted to the floor and properly grounded.
HIGH ALTITUDE INSTALLATION INFORMATION: Prior to installing at altitudes greater than 7500, please contact the
Mendota technical service department for specific venting requirements and venting restrictions.

1. After selection of the desired fireplace location, prepare the rough opening using framing dimensions. Be sure to

also prepare opening to allow for co-axial vent).

2. Check to make certain all venting requirements and locations are being followed.

3. This Fireplace is designed for installation into rough wood framing. NOTE: FRAMING MATERIAL ABOVE
FIREPLACE MUST MAINTAIN CORRECT CLEARANCE TO FIREPLACE AND VENT PIPES.
WARNING: One-inch clearance to sides & below and 3 inches clearance on top of horizontal vent sections and elbows
are required.

4. NOTE: A removable panel in the enclosure for future visual inspection of flue connection is recommended.

5. Have an electrician install a 110-Volt supply to the junction box on lower left side of the fireplace cabinet. Con­nect wires using wire nuts. Make sure the grounding wires are properly connected and that the installation conforms to all
local and national wiring codes.

6. Have gas supplier or qualified plumber install gas supply line to fireplace and connect to the ½” female connector.
Be sure gas and plumbing instructions (see Page 28 and 29) and all local and national codes are carefully followed.
Figure 5: Junction Box
IMPORTANT: Any safety screen, guard, glass, grill etc. removed for servicing this fireplace must be replaced prior to op­erating this fireplace.

BLOWER OPERATION
The Optional blower, if installed, can be regulated with the remote (included). NOTE: There will be a time delay in blower
operation during "heat-up" (5 min.) and extended blower operation during "cool-down" of unit (12-1/2 min.).

OPERATION DURING POWER OUTAGES
The fireplace is designed to operate during power outages on back-up batter­ies. The blower and Accent Light will not operate during the power outage.

PAGE 33

85-03-00923 ML47

GENERAL FLUE VENTING INSTRUCTIONS

The Mendota Fireplace must be vented using the Mendota approved vent system components. Approved brands of vent
components include DuraVent, Amerivent, Selkirk and Security vent pipes and venting components. All warranties will be
voided and serious fire, health or other safety hazards may result from any of the following actions: Installation by unau­thorized personnel; installation of any damaged component; unauthorized modification of vent system; installation of any
components not approved by Mendota; failure to meet all clearance requirements; failure to properly twist-lock and posi­tively seal all components. Consult local building codes before beginning the installation.
WARNING
Always maintain required clearances (air spaces) to combustibles to prevent a fire hazard. Do not fill air spaces with insu­lation. Check installation instructions for minimum clearance requirements between the outer walls of the vent pipe and
nearby combustible surfaces. Be sure to check the vent termination clearance requirements from decks, windows, soffit,
gas regulators, air supply inlets, and public walkways, as specified in these installation instructions and local building
codes.
SAFETY PRECAUTIONS FOR THE INSTALLER: 1) Wear gloves and safety glasses for protection; 2) Exercise extreme
caution when using ladders or on rooftops; and 3) be aware of electrical wiring locations in walls and ceilings.
This gas appliance and vent system must be vented directly to the outside of the building, and never attached to a chim­ney serving another solid fuel or gas burning appliance. Each direct vent gas appliance must have its own separate vent
system. Common vent systems are prohibited.
To assure proper venting performance of this high-performance Mendota Direct Vent Fireplace, it is critical that all brands
of vent pipe sections are sealed tightly and leak-proof. This means that all pipe sections must be carefully rotated into the
fully "twist-locked" position.
We strongly recommend that fixed length pipe sections be used in place of telescoping sections whenever possible.
Note: When using vent pipe and components that do not incorporate a fiberglass or graphite gasket at the inner exhaust
tube joints, you must use Milpak 1000F silicate stove sealant (#65-06-00909). Aluminum foil tape may be used on the
outer (air intake) pipe joint but is not mandatory. Local Codes may vary. Contact your dealer for proper materials.
Figure 6: Twist-Lock Piping
Do not separate telescoping sections. They must be used as complete assemblies.

COMPONENT "TWIST-LOCK" CONNECTION PROCEDURE
DuraVent and American Metals pipe and fittings are designed with special twist-lock connections. Twist-lock procedure is
as follows: four (4) indentations, located on the female ends of pipes and fittings are designed to slide straight in to the
male ends of the adjacent pipes and fittings, by orienting the four pipe indentations so that they match and slide into the
four entry slots on the male ends.
Push the pipe sections completely together then twist-lock one section clockwise, approximately ¼ turn until the two sec­tions are fully locked. The female locking lugs will not be visible from the outside on the black pipe or fittings. They may
be located by examining inside of the female ends.

HIGH ALTITUDE INSTALLATION INFORMATION
Prior to installing at altitudes higher than 7500, please contact the Mendota technical service department for specific vent­ing requirements and venting restrictions.

PAGE 34

85-03-00923 ML47

EXTERIOR VENT LOCATIONS AND RESTRICTIONS

ALL MEASUREMENTS FROM CENTER-LINE OF VENT CAP

 - Vent Terminal

X - Air Supply Inlet

 - Area where terminal is not permitted

A =

Clearance above grade, veranda, porch, deck, or
balcony (*18 inches (45 cm) minimum)

H =

*Not to be installed above a meter/regulator assembly
within 3 feet (90 cm) horizontally from the center-line
of the regulator; within a height of 15 feet

B =

Clearance to window or door that may be opened
(*18 inches (45 cm) minimum.

I =

*Clearance to service regulator vent outlet *3 feet (92
cm) minimum.

C =

*Clearance to permanently closed window (mini­mum 18 inches (45 cm) recommended to prevent
condensation on window)

J =

*Clearance to non-mechanical air supply inlet to build-

ing or the combustion air inlet to any other appliance.

12 inches (30 cm) minimum.

D =

*Vertical clearance to ventilated soffit located
above the terminal from the center-line of the ter-

minal 18” (45 cm) min. Minimum 24” (60 cm to Vi-

nyl Soffit)

K =

*Clearance to a mechanical air supply inlet
In USA, 3 feet minimum above, if within 10 feet hori-

zontally. In Canada, 6 feet minimum

E =

*Clearance to unventilated soffit 18” min (45 cm)
min. Minimum 24” (60 cm to Vinyl Soffit)

L =

† Clearance above paved side-walk or a paved drive­way located on public property (*7 feet (2.1 m) mini­mum)

F =

Clearance to outside corner - 12 inches (30 cm).

M =

Clearance under veranda, porch, deck, or balcony
(*18 inches (45 cm) minimum ‡)

G =

Clearance to inside corner - 12 inches (30 cm). Vi­nyl surfaces require 24” min (60 cm).

N=

Minimum 24” horizontal clearance to any surface,

such as an exterior surface, for vertical terminations.

† A vent shall not terminate directly above a sidewalk or paved driveway, which is located between two single-fam-
ily dwellings and serves both dwellings.
‡ Only permitted if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
* As specified in CGA B1:19 Installation Codes (1991). Note: Local codes or regulations may require different
clearances.
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.

PAGE 35

85-03-00923 ML47

FLUE VENTING COMPONENTS IDENTIFICATION

HIGH ALTITUDE INSTALLATION INFORMATION: Prior to installing at altitudes higher than 7500, please contact the

Mendota technical service department for specific venting requirements and venting restrictions.

Figure 7: Flue Venting Components

ITEM

DESCRIPTION

1

6" or 7” PIPE (DuraVent 6”/Amerivent 7”)

2

12" VENT STACK

3

24" VENT STACK

4

36" VENT STACK

5

48" VENT STACK

6

90ºGALVANIZED ELBOW

45º GALVANIZED ELBOW

7

ADJUSTABLE WALL THIMBLE (not shown)

8

ATTIC INSULATION SHIELD 12"

9

ROOF FLASHING (0/12 TO 6/12)

10

ROOF FLASHING (7/12 TO 12/12)

11

STORM COLLAR

12

VERTICAL VENT CAP

13

SUPPORT BAND

14

HORIZONTAL VENT CAP

15

FIRE STOP SPACER

1,2,3,4,5

13

15

9,10

11

12

DO NOT SEPARATE TELESCOPING SECTIONS.
USE TELESCOPING SECTIONS AS COMPLETE ASSEMBLIES.

PAGE 36

85-03-00923 ML47

ML47 MASTER FLUE VENTING REQUIREMENTS CHART
NOTE: THIS CHART IS APPLICABLE TO NATURAL GAS ONLY. FOR LPG INSTALLATIONS, SEE TABLE ON LEFT

SIDE OF THE CHART, BELOW.
IMPORTANT NOTES: See Figure 15, below.
Always use the longest vertical starter pipe section as the first vertical section attached to the fireplace directly.

18” minimum vertical section is required for Natural Gas and 24” minimum vertical section for LPG applications.
6 inches maximum horizontal pipe run allowed with a 900 elbow connected to the 18” minimum vertical section Natural

Gas and 24” vertical section LPG.
Maximum Vertical Run allowed is 40 feet.
Maximum Vent System length allowed is 42 feet.
Maximum number of 90o elbows allowed in Zone A is 3 and in Zone B is 4.
In Zone “A”, 32 feet maximum horizontal run allowed with a 4 feet starter section for NG and 27 feet maximum horizontal

for LPG. If the starter vertical section is less than 4 feet, use the chart and reduce 4 feet for every 900 elbow installed after
the first 900 elbow.

In Zone “B”, 32 feet maximum horizontal run allowed NG (27 feet max for LPG) only if the first vertical section connected
directly to the top of this fireplace is 4 feet or longer.

Figure 8: NATURAL GAS CHART
HIGH ALTITUDE INSTALLATION INFORMATION: Prior to installing at altitudes higher than 7500, please contact the

Mendota technical service de­partment for specific venting
requirements and venting re­strictions.

Natural Gas ONLY

V min

H max

18 in.

6 in.

24 in.

6 ft.

30 in.

13 ft.

36 in.

19 ft.

42 in.

25-1/2 ft.

48 in.

32 ft.

4 ft. - 10 ft.

32 ft.

10 ft. - 40 ft.

Varies

**LPG

V min

H max

24 in. (LPG)

6 in.

30 in.

8 ft.

36 in.

14 ft.

42 in.

20 ft.

48 in.

27 ft.

4 ft. - 10 ft.

27fft.

10 ft. - 40 ft.

Varies

PAGE 37

85-03-00923 ML47

IMPORTANT VENTING CONFIGURATION NOTES

See Figure 8 [MASTER FLUE VENTING REQUIREMENTS CHART AND TABLE FOR LPG APPLICATIONS].
HIGH ALTITUDE INSTALLATION INFORMATION: Prior to installing at altitudes higher than 7500, please contact the
Mendota technical service department for specific venting requirements and venting restrictions.

MAXIMUM HORIZONTAL RUN

Maximum Horizontal Run allowed is 32 feet if a vertical starter section that is between 4 feet to 10 feet is connected di­rectly to this fireplace’s flue starter collar and no more than one (1) 90 degree elbow is used.
Maximum Horizontal Run allowed is 6” if an 18” vertical starter section is connected directly to this fireplace’s flue starter
collar.

MAXIMUM VENT SYSTEM LENGTH

Combined total length of all straight pipe sections in the vent system shall be less than 42 feet.
Combined total length of all straight pipe sections in the vent system shall be less than 42 feet when using three (3) 90­degree elbows or equivalent and terminating the vent system horizontally in Zone “B”.
Combined total length of all straight pipe sections in the vent system shall be less than 42 feet when using four (4) 90­degree elbows or equivalent and terminating vertically.

HOW TO CALCULATE THE VENT SYSTEM LENGTHS

For calculation purposes and usage of charts in this manual, simply add the lengths of all individual straight pipe sections.
For example: if you use two 2-foot lengths and one 4-foot length, the total vent system length will be 2+2+4 = 8 feet.

USING 900 ELBOWS IN ZONE “B”

The ML47 Fireplace by MENDOTA allows maximum flexibility in the use of 90o elbows in the vent system. The length of
the first straight vertical section directly connected to the fireplace’s starter collar determines the maximum horizontal run
and the number of 900 elbows allowed for this fireplace.
For vent systems that provide a starting vertical section that is 4 feet or longer, you may connect up to 32 feet of horizon­tal pipe. For each 90o elbow installed after the first 90o elbow on top of the first 4 ft. section connected to the starter color
of this fireplace, reduce maximum allowed horizontal run by 4 feet.

USING 90o ELBBOWS IN ZONE “A”.

For vent systems that provide a starting vertical section less than 4 feet, the following rules apply:
a. You must use the Master Flue Venting Requirements Chart. See Zone “A” below the 4’ vertical run line.
b. A single 90º vertical-to-horizontal elbow is already calculated into the allowable maximum 32' horizontal run. The Vent­ing Requirements Chart (Figure 8) assumes that for all horizontal runs calculated, one 900 elbow is used within the vent­ing system. Each additional 90º elbow reduces the maximum horizontal distance by 4'.
c. If you plan to use more than one 900 elbow within the vent system, first use the Venting Requirements Chart (Figure 13)
and calculate the maximum horizontal run you are allowed based on the first vertical section connected directly to the fire­place. From this maximum horizontal run calculated, subtract 4 feet for each additional 900 elbow you will use.
Example 1: Assume you are using a 3 feet long starter vertical section. This should allow, per figure 13, 19 feet of hori­zontal run. If you want to use three 900 elbows, subtract 8 feet for two elbows from the 19 feet maximum allowed [4 feet
for each elbow after the first elbow]. This yields 11 feet as the maximum horizontal run that you are allowed to install us­ing the 3 foot vertical starter section.
CAUTION: If a vertical-to-horizontal discharge elbow or a horizontal-to-horizontal discharge elbow is enclosed within a
wall, floor or ceiling, a top air space clearance of 3" must be maintained above the elbow body.

USING 45-DEGREE ELBOWS

Two 45-degree elbows may be used in place of one 90-degree elbow. On 45-degree runs, one foot of diagonal pipe is
equal to 8-1/2 inches horizontal run and 8-1/2 inches vertical run. Two 45-degree elbows may be connected directly to
the vent starter adapter on this fireplace to create an offset to provide the required clearances to combustible framing or
sheathing materials.
Two 45-degree elbows may be connected directly to the top of this fireplace to create a horizontal offset. 20 feet maxi­mum horizontal run allowed with this offset configuration only if the first vertical section connected directly to the last 45­degree elbow is more than 4 feet long. For maximum allowable horizontal distances with the 45-degree offsets, see the
Master Venting Configuration Chart.

Note: Each horizontally positioned 45º elbow reduces the maximum horizontal distance by 1½ '.
SUPPORT: Horizontal runs of pipe will require one vent support for every 3 ft. of pipe.

PAGE 38

85-03-00923 ML47

APPROVED VENT SYSTEMS

Figure 9: Vent Systems
QUICK REFERENCE CHART

ZERO VERTICAL

HORIZONTAL TERMINATION

VERTICAL RISE

HORIZONTAL TERMINATION

ZERO VERTICAL

DUAL 90° ELBOWS

VERTICAL TERMINATION

VERTICAL RISE

DUAL 90° ELBOWS

VERTICAL TERMINATION

VERTICAL RISE

DUAL 90° ELBOWS

HORIZONTAL TERMINATION

VERTICAL RISE

TRIPLE 90° ELBOWS

HORIZONTAL TERMINATION

VERTICAL RISE

TRIPLE 90° ELBOWS

VERTICAL TERMINATION

THREE HORIZONTAL DISCHARGE

90° ELBOWS

APPROVED w/ RESTRICTIONS

STRAIGHT UP,

VERTICAL VENTING

NOT ALLOWED

APPROVED

H

H

H

H

H1

H1

H1

V

V

V2

V1

V2

V1

V2

H2

V1

H2

V

H2

APPROVED

APPROVED

APPROVED

APPROVED

APPROVED APPROVED

40 FEET

MAXIMUM

APPROVED

PAGE 39

85-03-00923 ML47

ZERO RISE HORIZONTAL TERMINATION

The ML47 Fireplace must be installed by a qualified Mendota approved serviceperson.
When the minimum 18” vertical and following 90-degree elbow is connected directly to this fireplace, the horizontal center­line of the 90ºelbow will be 53” inches up from the floor level of this Fireplace.
See Figure 8, MASTER FLUE VENTING REQUIREMENTS CHART and Figure 11 and Figure 10 below.
Figure 10

Use "fixed" pipe sections in place of adjustable pipe section s wherever possible. 1000º sealant must be used on ALL
inner pipe joints that do not have factory installed gasket material.

Always maintain 1" clearance from vent pipe sides and bottom to combustibles, 3" clearance on top of pipe on horizontal
runs and on top of horizontal discharge elbows. Do not
fill air spaces with insulation or other material.

Position fireplace in desired location. See Figure 13 for
guidelines on proper vent cap placement on the exterior
of home. Check to determine if wall studs are in the way
when venting system is attached. If this is the case, you
may want to adjust the fireplace location or modify the ex­terior wall framing to allow the vent system to penetrate
the wall.

Measure from the floor level of the fireplace up 53” inches
[add ¼” rise for every foot of horizontal run] and mark wall

directly at the center of where the vent pipe will penetrate
the exterior wall.

Cut and frame a 10-3/4" wide x 10-3/4" high opening in
the wall. The hole must be positioned so the vent system
will run level or have a ¼" rise per foot of run AND be per­pendicular to the wall. The height of the opening must be
located to meet all local and national building codes. Do
not allow the termination to be easily blocked or ob­structed. If wall being penetrated is non-combustible ma­terial, i.e. masonry block, brick, etc., a 9-inch diameter hole is acceptable.

Figure 11:

Attach the 18” vertical section to the fireplace starter adapter. Attach a 90­degree elbow then a 6” horizontal section. Be sure all vent component con-

nections are in their fully twist-locked position and are leak-proof. Be sure
1000ºsealant is used on the inner pipe joints of all pipe sections manufac-
tured by Simpson DuraVent. The length of the horizontal piece that fits
through the wall will be determined by the location of the fireplace relative to
the wall. For a normal installation where this fireplace is installed directly
against an exterior wall constructed using 2x4 lumber or 2x6 lumber, only a
6” horizontal section is required. There MUST be a minimum of 1" air space
clearance to combustibles from all vent components (3" above horizontal
runs and horizontal discharge elbows).

A wall thimble must always be used when penetrating combustible wall ma­terials.

From the exterior of the home, slide the horizontal vent cap over the end of
the horizontal pipe and tightly secure the cap to the wall with screws. Seal
with a high quality caulking.

NOTE: Combustible wall thickness must be 4" to 8" maximum
NOTE: Vent Cap body shall not be recessed into wall or siding.

PAGE 40

85-03-00923 ML47

VERTICAL RISE HORIZONTAL TERMINATION

The minimum vertical section required to be connected directly to the starter adapter on this fireplace is 48 inches when
used with a maximum horizontal run of 32 ft. If the total length of the vertical sections connected directly to the starter
adapter on this fireplace is between 4 feet and 41 feet, you are allowed a maximum 32 feet horizontal run. For other vent­ing configurations within these maximum limits, see Figure 15, Zone A and Zone B.

Combined total length of all pipe sections (include restriction of elbows) in the vent system shall be less than 42 feet.
NOTE: The horizontal run of vent pipe must be level or have a ¼" rise for every 1' of run toward the termination. Never

allow the vent to run downward. This will cause high temperatures and the possibility of a fire.
This ML47 Fireplace must be installed by a qualified Mendota service person
Position fireplace in desired location. See Figure 13 for guidelines on proper vent cap placement on exterior of home.

Check to determine if wall studs are in the way when vent system is attached. If this is the case you may want to adjust
the fireplace location.

Locate where vent pipe will pass through any ceilings and will penetrate the outside wall. Since vent pipe sections "over­lap" we suggest pre-assembling and measuring the total vent pipe run so you can more accurately locate the point where
the vent pipe will penetrate the outside wall (See Figure 13). Be sure all vent components are properly twist locked and
leak-proof. Be sure 1000º sealant is used in the inner pipe joints of all pipe sections manufactured by Simpson DuraVent.

Cut and frame a 10-3/4” wide x 10-3/4”” high opening in the outside wall openings and 10” x 10” opening in ceiling open­ings. The outside wall hole must be positioned so the vent system will run level or have a ¼" on rise AND be perpendicu­lar to the wall. The height of the opening must be located to meet all building codes and not allow the termination to be
easily blocked or obstructed. A ceiling fire stop spacer is required at any floor (ceiling) opening.

Connect vent pipe to the fireplace adapter on top of fireplace vent outlet.
The horizontal pipe must end flush with the exterior wall of the home. Horizontal pipe will require a proper support every 3
ft. of vent pipe. THERE MUST BE A MINIMUM OF 1" CLEARANCE TO COMBUSTIBLES FROM ALL VENT PIECES ON
THE SIDES AND BOTTOM AND 3" ABOVE HORIZONTAL RUNS).
A wall thimble must always be used when penetrating combustible wall materials.

NOTE: Combustible wall thickness must be 4" to 8" maximum.
From the exterior of the home, slide the horizontal vent cap over the end of the horizontal pipe and tightly secure the vent
cap to the wall with screws. Seal with high quality caulking.
NOTE: Venting terminal (Vent Cap) should not be recessed into wall or siding.
Figure 12

V min

H max

18 in.

6 in.

24 in.

6 ft.

30 in.

13 ft.

36 in.

19 ft.

42 in.

25-1/2 ft.

48 in.

32 ft.

4 ft. - 10 ft.

32 ft.

10 ft. - 40 ft.

Varies

NOTE: DO NOT SEPARATE TELESCOPING SECTIONS.
THEY MUST BE USED AS COMPLETE ASSEMBLIES.

PAGE 41

85-03-00923 ML47

Figure 13

Figure 14

V min

H1 +H2 max

24 in.

2 ft.

30 in.

9 ft.

36 in.

15 ft.

42 in.

21-1/2 ft.

48 in.

28 ft.

4 ft. - 10 ft.

28 ft.

10 ft. - 40 ft.

Varies

V1 min

H1 max

V2 max

H2 max

18 in.

6 in.

36-1/2 ft.

42 ft – H1-V2

24 in.

6 ft.

32 ft.

34 ft.42 ft – H1-V2

30 in.

13 ft.

27-1/2 ft.

42 ft – H1-V2

36 in.

19 ft.

20 ft.

42 ft – H1-V2

42 in.

25-1/2 ft.

6-1/2 ft.

42 ft – H1-V2

48 in.

32 ft.

10 ft.

42 ft – H1-V2

4 ft. - 10 ft.

32 ft.

Varies

10 ft. - 40 ft.

Varies

Varies

PAGE 42

85-03-00923 ML47

VERTICAL THROUGH-THE ROOF VENTING

The maximum vertical run of vent pipe is 40 ft. from the top of the fireplace. The fireplace will support a run of a maximum
of 40 ft. Maintain 1" air space clearances on all sides of vents (3" above horizontal runs).

If an offset is required directly on top of the fireplace, two 45o elbows may be connected directly to the top of this fireplace
to create a horizontal offset then to run upwards vertically. Doing so will continue to allow the use of the 40 feet maximum
vertical run.

The ML47 Fireplace must be installed by a qualified Mendota approved serviceperson.

1. Place the fireplace in its desired location. Drop a plum bob from the ceiling to the position of the fireplace flue
exit. Mark the location where the vent will penetrate the ceiling. Drill a small hole at this point. Next, drop a plum
bob from the roof to the hole previously drilled in the ceiling. Mark and drill the spot where the vent will penetrate
the roof. Determine if ceiling joists, roof rafters or other framing will obstruct the venting system. You may wish to
relocate the fireplace or to offset, to avoid cutting load bearing members.

2. Cut and frame a 10" x 10" opening in the ceiling centered on the hole drilled in Step No. 1.

3. To determine the length of the vent pipe required, measure the distance from the fireplace flue outlet to the ceil­ing, the ceiling thickness and the vertical rise in the attic or second story and allow sufficient vent height above
roofline. For two story installations, fire stops are required at each floor level. If an offset is needed in the attic,
additional pipe and elbows will be required.

4. Assemble the desired lengths of vent pipe and elbows to reach from the fireplace flue outlet. Ensure that all vent
pipe and elbow connections are in their fully twist-lock position and that inner pipe joints (DuraVent only) are
sealed and are leak-proof. Maintain 1" airspace clearances to combustibles (2" above horizontal runs). Cut a 10"
x 10" opening in the roof, centered in the small drilled hole placed in the roof in No. 1. The opening should be a
sufficient size to meet all clearance requirements. Continue to assemble lengths of pipe and elbows necessary to
reach up through the roofline. Galvanized pipe and elbows may be utilized in the attic, as well as above the roof­line. The galvanized finish is desirable above the roofline due to its higher corrosive resistance.

5. If an offset is necessary, it is important to support the vent pipe every 3 ft. to avoid excessive stress on the elbows
and possible separation. Wall straps are available for this purpose.

6. Slip the flashing over the pipe sections protruding through the roof. Secure the base of the flashing to the roof
with roofing nails and seal flashing to roof. Ensure the roofing material overlaps the top edge of the flashing. Ver­ify you have at least the minimum clearance to combustibles at the roofline.

7. Continue to add pipe sections until the pipe and the vent cap meet the minimum building code requirements, as
outlined in No. 8 on the following page.

8. For multi-story vertical installation, a ceiling fire stop is required at the second floor and any subsequent floors.
The opening should be framed to 10" x 10" inside dimensions as described in step No. 5.

9. Any occupied areas above the first floor, including closets and storage spaces, which the vertical vent passes
through, must be enclosed. The enclosure may be framed and sheet rocked with standard construction materials,
however, be sure to maintain minimum allowable clearances between the outside of the vent pipe and the com­bustible surfaces of the enclosure.

10. Height "*H" from roof surface to the top of vent cap can be determined as follows:
Complete installation with storm collar and vent cap.

"H" DIMENSION

ROOF PITCH

FEET

METERS

FLAT to 6/12

1

.3

7/12 to 9/12

2

.6

10/12 to 12/12

4

1.2

13/12 to 16/12

6

1.8

17/12 to 21/12

8

2.4

PAGE 43

85-03-00923 ML47

.

V1 min

H max

V2 max

18 in.

6 in.

38-1/2 ft.

24 in.

6 ft.

34 ft.

30 in.

13 ft.

27 ft.

36 in.

19 ft.

21 ft.

42 in.

25-1/2 ft.

14-1/2 ft.

48 in.

32 ft.

10 ft.

4 ft. - 10 ft.

32 ft.

Varies

10 ft. - 40 ft.

Varies

Varies

Figure 16

Figure 15

PAGE 44

85-03-00923 ML47

VERTICAL THROUGH-THE-ROOF VENTING USING FOUR 900 ELBOWS

In extreme situations, Four 900 elbows may be required to reach a proper exit point for the vent system. Mendota has
spent considerable time and effort in the design of this fireplace and its venting system. Through this effort, Mendota has
been able to certify the use of Four 900 elbows.
The use of Four 900 elbows must meet some minimum prerequisites.
Prerequisite #1: The vent system must terminate vertically using a vertical vent cap.
Prerequisite #2: There must be a minimum 12 inches of vertical starter section connected directly to the top of this fire­place.
Prerequisite #3: For vertical starter sections less than 4 feet tall, you must reduce 6 feet off the maximum horizontal run
allowed per Figure 15 on page 21, Zone A.

V1 min

H1 +H2 max

V2 MAX

24 in.

2 ft.

10 ft.

30 in.

9 ft.

10 ft.

36 in.

15 ft.

10 ft.

42 in.

21-1/2 ft.

10 ft.

48 in.

28 ft.

10 ft.

4 ft. - 10 ft.

28 ft.

Varies

10 ft. - 40 ft.

Varies

Varies

PAGE 45

85-03-00923 ML47

ML47 DOOR OPERATION

TO REMOVE DOOR
Use the glass latch tool to disconnect the spring latches from the glass frame. Insert tool into hole in latch, pull towards
you and Rotate 90 degrees to disengage top latches. Remove tool. There are two spring latches on top of this gas

fireplace.

With both hands, rotate top edge of glass frame away from unit 8 inches.
Lift glass frame up 1 inch, at an angle, and move away from unit.
Door is now free from unit.

TO REPLACE DOOR

Identify small tabs that protrude downward on the bot­tom left and right corners of glass frame. Identify a rec­tangle slot on the bottom right and left corners of firebox
opening sides.
Carefully line up the bottom corner tabs in glass frame
bottom corners with slots in firebox bottom left and right
corners. Insert tabs into slots and center glass frame
over firebox, left to right.
After door has been placed into slots, rotate door to­wards firebox until gasket seal is touching the firebox
frame.
Use the tool provided to connect the spring latches to
the glass frame. Insert tool into hole in spring latch, pull
latch towards you, rotate latch so the hook is facing
downward then release latch to hook to door frame.
Door is now connected and sealed to unit.

2.) PULL

3.) ROTATE

4.) RELEASE

1.) INSERT

PAGE 46

85-03-00923 ML47

The following Check-Off Lists must be completed prior to final operation of the Fireplace.

INSTALLATION CHECK OFF LIST

❑

Co-axial vent rigid pipe, wall vent cap or roof vent cap must be installed by a Mendota
approved person in accordance with instructions. All joints must be secured, "twist­locked" and leak-proof. 1000ºF sealant must be used on the inner pipe joints of all Du­raVent pipe sections.

❑

Horizontal or vertical vent cap must be installed "right-side-up" and tightly sealed to struc­ture per instructions. Vent Caps must be Mendota approved.

❑

Proper exterior and interior clearances for vent systems and locations for wall vent
cap/roof vent cap must be maintained.

❑

Carefully check for correct gas pressure, proper size gas lines and for gas leaks.

❑

115 V electrical service and gas supply must be installed in accordance with instructions
and local and national codes.

LIGHTING CHECK OFF LIST

❑

All items on "Installation Check Off List" (see above) must be completed.

❑

Check for gas leaks and gas pressures prior to installing facing materials.

❑

Install fresh batteries in remote transmitter. Follow “Initializing the System for the first
time” instructions to synchronize the remote control and the receiver.

❑

Check air shutter opening - 0" to 1/8" Nat. gas or 3/8”” to 1/2” LP gas.

❑

Carefully follow all Lighting and Log Installation Instructions.

❑

Make certain that burners light immediately and flame runs promptly around "curve" in
rear burner and lights entire burner. DO NOT proceed with operation unless burner cy­cles "on/off" without delays.

❑

Make certain that the flame is "stable" and does not "lift" off burner. If flame lifts off
burner, turn unit off and check that all vent pipes are "twist locked" and leak proof, the
vent cap is "right side up" and that 1000º Sealant has been used on the inner pipe joints
of all DuraVent pipe sections. DO NOT proceed with operation if flame is "lifting off"
burner.
Note: Do not separate telescoping sections. They must be used as complete assem­blies.

❑

Make certain glass door is in proper closed position and "centered" in firebox opening.

PAGE 47

85-03-00923 ML47

ML47 BURNER MEDIA 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.
Many media choices are available directly from Mendota for use on the ML47 model. Select one media and purchase sep­arately. Specific installation instructions are included with the Driftwood and Twig Set options.
Media Choices:
Black Glossy Glass Media, 1/2" diameter, 5 lbs bag, requires 2 bags
Natural Rocks Fiber Media, 1"-1-1/4" diameter mixture, 70 pieces in random colors
Other media options may be available. Contact your Mendota dealer.
How to install burner media properly:
Spread media on burner's top surface randomly. Burner Media may block air slots, partially, that are in front, behind or on
sides of burner..
Burner Media can be 2-3 layer thick and loosely spread over burner surface. DO NOT pack tightly. Allow space between

media pieces. Avoid completely covering air slots in front and behind burner. Save extra media that is not used.

FLAME APPEARANCE ADJUSTMENT
AIR SHUTTER ADJUSTMENTS

Be sure burner and burner media are positioned properly. For Natural Gas applications, air shutter shall be 1/8” open. For
LPG applications, start with air shutter open to 3/8”. After burner has been properly installed and operated for 20

minutes, small additional adjustments to the air shutter may be necessary for final flame appearance. These small shutter
adjustments can be made by following these procedures:
NOTE: Start with the burner air shutter set at 1/8” open for NG and 3/8” to 1/2” open for LPG. Opening the shutter
will yield shorter and blue(er) flames and closing the shutter will yield taller and yellow(er) flames.
The burner air shutter adjustment lever is located inside the firebox on the left side of center.
Install burner media and glass frame, and burn unit for 20 minutes minimum.
If flame is too "blue" open Air Shutters until flames turn yellow.
If flames are too "orange" or are causing sooting, open Air Shutters until flames begin to turn blue. NOTE: If sooting
does not stop, turn off fireplace & call a Mendota Service Person.

IMPORTANT: Try each new shutter setting for approx. 20 minutes before making additional changes.
NOTE: Changes in burner flame can be made by re-arranging the burner media as well. Make certain burner media is

loosely spread over burner. DO NOT pack media tightly.

For NG applications, start with the burner air shutter closed to 1/8” open. For high altitude applications, air shutter may

need to be open further.
For LPG applications, start with the burner air shutter open to 3/8”. For high altitude applications, air shutter may need to
be opened further.

PAGE 48

85-03-00923 ML47

LOCATION OF MASTER SWITCH AND SYNC SWITCH

The Master Switch and Sync Switch are located 9-3/4” to right from the left edge of the glass frame and under the bottom
edge of the glass frame in the bottom air gap.

Use the glass latch tool to actuate the two switches.
The Master Switch must be ON for the pilot flame and burner flames to activate.
The SYNC switch is to be used initially when mating the remote transmitter with the receiver located within this appliance

body. Sync switch use is not necessary during remote transmitter battery replacement. The receiver will continue to re­main synced to the original transmitter even if battery power is removed from the remote transmitter.

PAGE 49

85-03-00923 ML47

BEFORE YOU BEGIN

Read this entire manual before you use your new fireplace (especially the section “Safety Precautions” on page 2). Fail-

ure to follow the instructions may result in property damage, bodily injury, or even death.

Remote Control Functions
NOTE: You will hear an audible beep once every time a remote-control button is pressed, signaling that the command has

been received. If you do not hear the beep, press the button again.
Locate the four function buttons on the remote control:

1. On/Off Button: This button turns the fireplace on or off. When this button is pressed, and the system is off, the
pilot will ignite. After pilot ignition, the pilot will light the main burners. Refer to IPI and CPI Modes in this manual
for pilot ignition.

2. Thermostat Button: This button will allow the selection of three modes: Manual, Normal Thermostat, and Smart
Thermostat.
a. Manual (Off): In this mode, the fireplace can be turned on, regardless of the room temperature. The actual

room temperature has no effect in this mode. All other functions such as fan speed control, flame height
control, secondary burner on/off control and accent light intensity controls are manually controlled.

WARN ING: Do not leave this appliance burning and unattended for long periods in the manual(off) mode.
Leaving the appliance bu rning in manual (off) mode for long periods can lead to overheating of the living
space which can negatively affect plants, animals, infants and vulnerable people.

Note: In Manual Mode, the fireplace will automatically shut off after 12 hours of continuous use. In Normal
Th ermostat and Smart Thermostat modes, if the fireplace does not receive a prompt from the remote -control
transmitter for 60 minutes, the fireplace will automatically shut off. This can occur if th e remote control is
mov ed to another room or if the remote batteries are very weak.

b. Normal Thermostat (On): In this mode, the fireplace will

turn itself on and off, depending on the temperature you
set. When you set the fireplace thermostat, the fireplace
will stay functioning until the room temperature increases
1oF above the set thermostat temperature. To increase
the thermostat temperature, press the up button until the
desired temperature is displayed in the thermostat temperature window. The fan will turn on five minutes
after fireplace startup and will turn off 12-1/2 minutes after the flames turn off, in this mode. The flame height
can be adjusted while the fireplace is functioning, fan speed can be adjusted after five minutes of startup.
Rear burner can be turned on or off at any time after startup. The accent light can be adjusted any time after
startup.

c. Smart Thermostat (Smart): In this mode, room temperature is maintained and flame height adjusts auto-

matically to provide continual, efficient heat. All other functions of the normal thermostat mode, except the
flame height adjustment, are allowed. Manual flame height adjustment is not allowed in this mode. The
Smart Thermostat function adjusts the flame height in accordance to the difference between the set point
temperature and the actual room temperature. As the room temperature gets closer to the set point temper­ature, the Smart Thermostat automatically modulates the flame down.

3. Up/Down Button: This button is used to increase or decrease the thermostat temperature, flame height, fan
speed, and accent light intensity.

4. Mode Selection Button: This button is used to toggle between the various function icons: flame height, fan
speed, accent light.

Figure 0-1 Display Modes

PAGE 50

85-03-00923 ML47

Remote Control Operating Instructions
To Turn on the Fireplace

NOTE: If the fireplace does not respond to the remote-control commands, the fireplace system may have entered “safety
lockout” mode. Press the on/off button. The remote-control display will show all active icons on the screen and the fire-

place will emit an audible beep.

1. Select the thermostat mode by pressing the thermostat button: OFF (meaning Manual), ON (meaning Normal
Thermostat) or Smart (meaning Smart Thermostat).

a. If the thermostat icon displays as “OFF” (Manual), the fireplace will ignite and start on Hi.
b. If the thermostat icon displays as “ON” (Normal Thermostat), the fireplace will only ignite if the ther-

mostat temperature is greater than the room temperature.

c. If the thermostat icon displays as “SMART” (Smart Thermostat), the fireplace will only ignite if the

thermostat temperature is greater than the room temperature.

To Turn off the Fireplace

Press the on/off button. The fireplace will turn off.

Understanding Your Remote-Control Icons

Your remote control displays and controls the following functions. See below for detailed control explanations.
Note: the “AUX On” and “Rear Burner” functions are not used in this fireplace.

Figure 0-2 Remote Control Icons

PAGE 51

85-03-00923 ML47

Icon Details

Mode Button: Pressing the mode button toggles between the various available functions: flame height, fan

speed, accent light intensity.

Flame Height: Six flame height levels are available. While the flame height
icon is displayed, pressing the up or down button once will increase or de­crease the flame height by one of six increments.
If the flame height is at Level one and the down button is pressed, all burners
will turn off.

If in IPI mode, the pilot will also extinguish.
If in CPI mode, the pilot will remain on.
Note: If in Smart Thermostat, the flame height function is not available for manual adjust­ment. In Smart Thermostat, the flame height regulates automatically.

Fan Speed Control: The fan speed can be adjusted through six speeds and
off. To activate this function, press the Mode button until it displays the fan
icon. Use the up/down arrow button to turn on, off, or adjust the fan speed.
Once you set the desired fan control, the system will remember your selected
fan speed until you manually change it.

Accent Light: This function controls the accent light functions. Pressing
the UP button in this mode will turn on the accent light and allow you to
control the 6 levels of intensity. Once you set the desired light intensity,
the system will remember your selection until you manually change it.

How do I change from Celsius to Fahrenheit?

To change between °C to °F, follow these steps:

1. Press the ON/OFF button and turn off the fireplace.

2. Simultaneously, press both the mode button and the thermostat button.

3. Look at the LCD display to verify that your desired indicator (°F or °C) is being displayed.

If not, repeat Step 2.

OPERATING DURING POWER OUTAGES

This electronic ignition system utilizes the supplied 110VAC power when it is available for all functions of this system. If
the AC power is interrupted during a power outage, plug in the battery pack (supplied with this fireplace) to the Fireplace
Backup Power Inlet Port installed on the wall to the left side of the fireplace (located about 18” up from floor level).
During the power outage, the appliance’s burners will function. In addition and Flame Height adjustment functions will be
available. The Fan and Accent Light, which are wholly dependent on 110VAC power, will not function.
This appliance is designed and tested to be operated during power outages. The overall efficiency of this appliance will be
reduced by approximately 5% when the blower function is disabled during the power outage period.

FIREPLACE BACKUP POWER INLET

(6V DC MAXIMUM)

BATTERY PACK WITH
4X AA BATTERIES.

PAGE 52

85-03-00923 ML47

First Time Lighting Instructions

Safety Information

• This fireplace is equipped with an ignition device which automatically lights the pilot. Do not attempt to light pilot by

hand.

• Before operating, smell all around fireplace area for gas. Be sure to smell next to the floor because some gas is heav-

ier than air and will settle on the floor.

• Toggle Master Switch to ON. Remote control will not communicate to receiver unless the Master Switch is ON.

• Use only the supplied remote control to light the pilot. This valve will not operate if the pilot is not lit and stable.

• Do not use this fireplace if any part has been underwater. Immediately call a qualified service technician to inspect and

replace any component which has been under water. Attempted operation may result in fire or explosion resulting in
property damage, personal injury, and loss of life.

Operating Instructions

1. Read the above safety information carefully before proceeding.

2. Do not attempt to light the pilot by hand; the door must remain on this unit during pilot ignition.

3. Press the ON/OFF button on remote control to begin the ignition sequence.

The fireplace will emit an audible beep then the igniter will begin to spark. After the pilot lights and is established, the
valve will automatically open and the burner will light. The burner will initially light to full flame. Adjust it to an appealing
setting with the remote. See Remote Operating Instructions in Operating Instructions Manual.
Warning: If the pilot fails to light, the system will “lockout”. Press ON/OFF button on remote control to Turn Off the sys-
tem and reset the “lockout”. Allow five minutes for any gas in the unit to dissipate before attempting to re-light the pilot.

4. Press ON/OFF button on remote control again to start ignition sequence.

5. If the fireplace will not operate, follow the instructions “To Turn off Gas to Fireplace” below and call your service techni-

cian or gas supplier.

To Turn Off Gas to Fireplace

1. Press the ON/OFF button on the remote control.

2. Turn off CPI Pilot Mode from remote control.

3. Turn OFF the external manual shutoff valve if was required and supplied by installer and mounted adjacent to fire-

place.

4. Turn OFF the internal manual shutoff valve located in the fireplace under the front right access panel.

5. Turn OFF all electric power to the fireplace if service is to be performed.

Warning: If you do not
follow these instructions
exactly, a fire or explo­sion may result causing
property damage, per­sonal injury, and loss of
life.

WHAT TO DO IF YOU SMELL GAS
Do not light any appliance.
Do not touch any light switch
Do not use any phone in your building.
Call your gas supplier from a neighbor's phone.
Follow the provider representative's instructions.
If you cannot reach your gas supplier, call the fire

department for assistance.

PAGE 53

85-03-00923 ML47

IPI/STANDING PILOT SYSTEM INFORMATION

Intermittent Pilot Light and Standing Pilot Light Features

This gas fireplace is equipped with an electronic ignition System that first lights a pilot light then uses the pilot light to ig­nite the main burners. The pilot light can be set in the CPI (Standing Pilot) mode to allow the pilot light to remain on indef­initely by setting the Remote Transmitter to CPI mode. If the remote transmitter is set to the IPI (Intermittent Pilot) mode,
the pilot light will only light and remain ON while the main fireplace burners are operating.
IPI Mode: This mode turns the pilot light “OFF” when the fireplace is not functioning and only lights the pilot light automat­ically when a call for heat is made by the remote control.
(CPI) Standing Pilot Mode: If set to CPI Mode, the
pilot light will ignite and remain ON at all times.

Setting to IPI versus CPI mode:
With the remote transmitter OFF, press the MODE

button. You will see either “CPI” or “IPI” displayed

on the transmitter screen. Press the UP arrow but-

ton to set “CPI” mode and press the DOWN arrow
button to set “IPI” mode. One set to the desired

setting, press On/Off button to activate the fire­place.

NOTE: Mendota Fireplaces recommends that the
(CPI) Standing Pilot Mode be used during the win­ter months when the average daily high temperature falls below 50oF. This will keep the fireplace chimney heated for
proper updraft during burner ignition and it will also eliminate excessive condensation of exhaust vapors on the door
glass. Further, leaving the fireplace in the Standing Pilot Mode will keep the fireplace body warm and eliminate cold drafts
and heat loss to the cold air that is trapped inside the firebox.

REMOTE CONTROL

WALL RECEIVER

Supply voltage

4.5V (three 1.5V AAA batteries)

6.0V (four 1.5V AA batteries)

Ambient temperature ratings

32 – 122 oF (0 – 50 oC)

32 – 140 oF (0 – 60 oC)

Radio Frequency

315 MHz

315 MHz

ATTENTION!
The transmitter and receiver are RADIO FREQUENCY DEVICES. Placing the receiver in or near metal may se-
verely reduce the signal range.

Turn off the main gas supply of the appliance during installation or maintenance of the receiver.

Place the receiver’s 3-position slider switch in the “off” position during installation or maintenance.
Turn “off” main gas supply to the appliance prior to removing or reinserting the batteries in the receiver.

During appliance installation/maintenance or in case of remote control malfunction, turn off electrical sup-
ply to this appliance and remove the batteries from the wall receiver battery compartment. Contact tech-
nical service.

ATTENTION!
The transmitter and receiver are RADIO FREQUENCY DEVICES. Placing the receiver in or near metal may se­verely reduce the signal range.
Turn off the main gas supply of the appliance during installation or maintenance of the receiver.
Toggle the Master Switch to OFF during installation or maintenance.
Turn “off” main gas supply to the appliance prior to removing or reinserting the batteries in the receiver.
During appliance installation/maintenance or in case of remote control malfunction, turn off electrical supply to this
appliance and disconnect the Backup batteries from the wall DC connector. Contact technical service.

PAGE 54

85-03-00923 ML47

TROUBLE SHOOTING THE ML47 FIREPLACE & MAINTENANCE INFORMATION

SYMPTOM

PROBABLE CAUSES

CORRECTIVE ACTION

1. Thin black coating
(soot) forms on view­ing glass.

A. Incorrect gas pres­sure or improper orifice
size.

B. Not enough combus­tion air. Air slots
blocked off.

Have gas supplier check for correct gas inlet pressure (7" W.C.
Nat. Gas; 11" W.C. LP Gas).
If sooting continues, open air shutter on burner (see "Gas
Flame Adjustment" below).
If sooting still continues, shut off unit and call Mendota service
person.
NOTE: To clean glass - remove glass and wipe glass with
cloth or paper towel.

2. Humming or whis­tling coming from
Fireplace.

A. Normal operating
noise.

Some noise is normal. It is caused by the gas supply flowing
through the gas orifice. It is expected from any gas fireplace.
Turning the Hi/Lo Knob on the control can reduce the noise.
Turning down the flame will reduce the heat output of the unit.

3. A change in flame
appearance or burner
operation.

A. A change in gas
pressure.

B. Vent system re­stricted.

Have your gas supplier check for correct gas 7" W.C. Nat. Gas;
11" W.C. LP Gas). If flame still needs adjustment see "Flame
Adjustment" below.
Clean out carbon, spider webs, lint, etc. from shutter area.
Logs and burner.
Check Vent Cap’s AIR INTAKE and Exhaust OUTLET ports.

OVER FIRING OF BURNER

NEVER "over fire" units by adjusting gas pressure or drilling out the orifice to increase BTUH above nameplate specifica­tions. Over firing can cause permanent damage to firebox and deterioration of parts and void warranty.
MAINTAINING CORRECT PILOT-FLAME, PILOT OUTAGE & RELIGHTING
The pilot flame must be checked during initial installation and annually by a qualified Mendota Technician. This appliance
utilizes Flame Rectification Technology. If the pilot flame is turned down too low, the flame sensor may not detect the pilot
flame and the pilot light may not stay lit. Do not turn down the pilot light flame. Use the IPI mode instead during summer
months.

CLEANING VIEWING GLASS

The viewing glass should be cleaned periodically. Exterior glass surface may be cleaned with cleaner as desired. To
clean interior surface of glass - use soap and water. CAUTION: Do not use oven cleaner to clean glass. Clean the glass
only when it has cooled to room temperature.

NOTE: Additives that are put in gas (both natural and propane) to make it smell can be harmful to glass and can leave a
white film deposit on the glass. This deposit can be removed with cleaners such as KEL KEM “Polish Plus” (part # 65-06-

00455) or comparable product (contact your dealer).

In some cases (especially when burning propane) additives can cause “crazing” or etching of the glass. This is not a
common occurrence. However, any “crazing” or etching of the glass is not covered under the warranty. The solution may

be to change propane suppliers.

SOOTING

Sooting is caused by improper installation of media, vent system or improper primary air shutter operation. However,
some small areas of soot deposits on media surfaces are deemed acceptable. If you observe signs of sooting on the door
glass (usually a thin black film on the Fireplace viewing glass or on the outside of the home around the vent cap), the unit
must be immediately turned off and the local Mendota dealer promptly informed. Mendota dealers will correct "sooting"
problems, but Mendota and their dealers are not responsible for damage caused by excessive sooting that has not been
immediately brought to their attention.

OPERATION DURING POWER FAILURE

This fireplace is designed to operate during power outages. Blowers and the Accent Light will not function during power
outages. However, all burners will continue to function normally. Heat output will be reduced slightly without the blower
functioning (approximately 5% less).

GAS SHUTOFF PROCEDURES

The planning and installing individual must plan for a local code approved Manual keyed gas shut off valve installation.
Consult with your installer about specific procedures about emergency gas shutoff.

PAGE 55

85-03-00923 ML47

MAINTENANCE
ANNUAL MAINTENANCE OF MENDOTA UNITS IS REQUIRED. The fol-

lowing procedures must be performed each year by a Mendota approved ser­vice person. NOTE: Any adjustments to burner, pilot or burner media must
be done by a qualified Mendota service person.
Clean all lint and dust build-up around the control. Inspect the condition of
any wiring under the burner for melting or damage.

A. Remove media and clean away any foreign matter (lint, Carbon, etc.)

on the burner and pilot light body and base. Be sure the burner ports
are "open". Clean the pilot for any Carbon deposits. Be sure logs
are re-installed per instructions in this manual.

B. Check condition of glass door gasket, gasket must seal tightly over

firebox, replace if necessary.

C. Periodically check to verify that the vent system and vent cap are

open and free of blockage.

D. Before re-installing glass, have qualified service person check the op-

eration of the pilot and cycle the burner per LIGHTING
INSTRUCTIONS. Be sure all items in LIGHTING and INSTALLATION "check off” lists are completed.

E. The viewing glass should be cleaned periodically. Exterior glass surface may be cleaned with cleaner as desired.

To clean Interior glass surface, use Kel Kem “polish plus" (part # 65-06-00455) or comparable product. Do not
use oven cleaner or abrasive cleaners to clean glass. Do not clean when glass is hot.

F. Periodic visual check of pilot flames is required. Pilot Flame must overlap Flame Sensor and burner ignition ports

at all times.

Periodic visual check of main burner’s rear and front flames is required.
BURNER FLAMES GENERAL HEIGHTS REFERENCE DIAGRAM

1" MIN.

1" MIN.

1" MIN.

1" MIN.

SPARK ROD

FLAME SENSOR

HOOD

PAGE 56

85-03-00923 ML47

BASIC MAINTENANCE

To access internal components for general service or maintenance requirements, remove any decorative front, remove
the glass door, remove all burner media, inner Panoramic Lining and floor plate, remove main burner. Locate two access
plates on the left and right side of firebox floor. See diagrams, below. Unscrew seven outer screws and lift entire left or
right cover plate assembly which provides access to inner electronic components and gas train systems.
The left cover plate assembly provides direct access to the main electrical junction box and the main ignition module and
wiring connections.

PAGE 57

85-03-00923 ML47

NATURAL TO LP GAS CONVERSION

Kit # HA-90-00110 for Mendota Model ML47

Caution: The electrical supply to the fireplace must be turned off prior to performing the conversion. The gas supply
must be shut off prior to disconnecting the electrical power.
ORIFICE SIZES REQUIREMENT:

A Natural Gas to LPG conversion kit #HA-90-00110 must be installed to convert the ML47 Fireplace to burn LPG.
LP Conversion Kit #HA90-00110 contains the following parts: One Motorized LP Pressure Regulator and one Cap Ori-

fices drill #49.
Recommended Procedure To Convert This Fireplace To Burn LPG
This fireplace arrives from the factory ready to burn Natural Gas. If you intend to burn LPG, it is highly recommended that

you convert this fireplace and its Pressure Regulator, Pilot Orifice Slider Tab and Burner Orifice prior to placing this fire­place in its framed cavity.

See diagrams, on this page, and follow instructions to prepare this fireplace for conversion to LPG.
Remove the Burner by removing 2 screws in front of burner that secure burner weldment to firebox floor.
Remove front bottom cover plates below glass frame.
Identify the Pilot Light Hood, Main Burner Orifice and the Valve Pressure Regulator.

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 instructions
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
owner instructions supplied with the kit.
Cet équipement de conversion sera installé par une agence qualifiée de service conformément aux instructions du
fabricant et toutes exigences et codes applicables de l'autorisés avoir la juridiction. Si l'information dans cette In­struction n'est pas suivie exactement, un feu, explosion ou production de protoxyde de carbone peut résulter le dom­mages causer de propriété, perte ou blessure personnelle de vie. L'agence qualifiée de service est esponsable de
l'installation propre de cet équipement. L'installation n'est pas propre et complète jusqu'à l'opération de l'appareil
converti est chèque suivant les critères établis dans les instructions de propriétaire provisionnées avec l'équipement.

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85-03-00923 ML47

WARNING: It is of the utmost importance that the correct burner orifice be installed
Turn off gas supply at the appliance service valve.
See written instructions that accompany the LP pressure regulator.

1. Using a Torx T20 or a slotted screwdriver, remove 2 screws that secure the NG Pressure Regulator to the gas
valve body and remove NG Pressure Regulator, see following page.

2. Install the new LP Pressure Regular onto the gas valve body in the same position and orientation as the NG Pres­sure Regulator you removed in Step 3, above. The LP Pressure Regulator can only be mounted in one position.
Secure the LP Pressure Regulator in place. Tighten down.

3. Remove the Burner. Locate and Identify the Burner Orifice Spud . The Orifice Spud can be removed and installed

using a ½” hex wrench. WARNING: Make certain to Secure the Brass fitting and flex supply tube attached to the

orifice in place using a 1/2" open end wrench before attempting to remove the burner orifice and also when in­stalling and tightening the new LP orifice.

4. Install Burner Orifice #65-14-00049 (#49 drill) for the Main Burner. Tighten down securely.

5. Loosen Pilot Light’s hex shape base using a 7/16” open end wrench. Rotate counter clock-wise ¼ turn to loosen.

6. Pilot arrives from the factory set for NG. Push NG/LP Adjustment Clip inward all the way to set it for LP. See detail

view, below. If you see “NAT” printing on the Adjustment Clip, this indicates that the pilot is set to burn NG. Push

Clip in so that “NAT” is not visible.

7. Tighten down Hex shaped base of pilot using a ½” open end wrench.

Burner Orifice

[#49]

Motorized

LP Pressure

Regulator

[10.0-5.5"WC]

PAGE 59

85-03-00923 ML47

LP PRESSURE REGULATOR CONVERSION INSTRUCTIONS

WARNING: Failure to position the parts in accordance with these diagrams or failure to use only parts specifically ap-

proved 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.

PAGE 60

85-03-00923 ML47

LP GAS PRESSURE REQUIREMENTS

Inlet and manifold gas pressure checking taps are located on gas valve. These ports are only accessible from the outer
left side of the fireplace. A qualified installer shall take pressure measurements at these ports to verify and set the correct
gas pressures during the LP Kit installation and before fascia materials are installed over the front of this fireplace. Mani­fold pressure must be taken at the “MANIFOLD PRESSURE" tap and inlet pressure at the "INLET PRESSURE" tap with
the burner operating by a qualified installer.

DESIRED
INLET
PRESSURE

MINIMUM
INLET
PRESSURE

MAXIMUM
INLET
PRESSURE

MANIFOLD
OUTLET
PRESSURE

AIR SHUTTER
POSITION

L.P. GAS

12.0" W.C.
(2.99 kPa)

12" W.C.
(2.99 kPa)

14.0" W.C.
(3.49 kPa)

10.0" W.C.
(2.5 kPa)

1/4" OPEN
MIN.
(5 mm)

REGULATE THE FLAME HEIGHT TO "HIGH" POSITION. OUTLET GAS PRESSURES MAY VARY PLUS OR MINUS
5%.
LPG PROPER INPUT RATES:
With the proper orifices installed and the Outlet Manifold
Pressure verified to be per the table, as specified above,
this fireplace utilizing LP Gas will have a maximum input
rate of 41,000 Btu/Hr.

LEAK TESTING REQUIREMENTS

Prior to completing the conversion process, check for gas
leaks with soap and water solution at all plumbing joints
prior to placing this appliance into operation. It is recom­mended that all gas-plumbing joints, factory installed and
field installed are checked for leaks.
Figure 3: Pressure Test Port

PILOT FLAME AND MAIN BURNER RELATIONSHIP
VERIFICATION

Prior to completing the conversion process, the qualified service technician must, light the pilot light and verify the relation­ship between the pilot light flames and the main burner. The pilot light flames directed towards the propagation ports on
the rear and front burner must overlap the propagation ports on the burners. The pilot light flames must be a minimum of
¾” long and must overlap the propagation ports on both the rear and front burners as shown in the diagram, below. Verify
that the burner tubes ignite quickly and the burner flames propagate smoothly along the entire length of the burners.

PILOT FLAME LENGTH ADJUSTMENT

If the pilot light flame length is too short and the system does not maintain a standing pilot, a qualified installer may in­crease the length of the pilot light flames to meet the two requirements: Minimum pilot light length to maintain a standing
pilot light and the pilot light flames must be long enough to overlap burner flame propagation ports.

Derating at altitudes above 2000 feet

Installation of this appliance at altitudes above 2000 feet requires the gas input rate to be derated. For LPG applications,
the main burner orifice size for altitudes above 2000 feet shall be #49. LPG gas input rate for installation above 2000 feet
shall be 40,000 Btu/Hr.

1" MIN.

1" MIN.

PAGE 61

85-03-00923 ML47

CHECKING FOR NORMAL BURNER (S) IGNITION CHARACTERISTICS

Once the conversion to LPG and all the above steps have been completed, install Burner Media and light the main burner.
On the Remote Transmitter, push On/Off button to ON . Change Thermostat Mode to "MANUAL". The pilot system will
begin to spark and then the Main burner should light and flame should not "lift" off burner. If there is any delay in ignition
or if flame is "lifting off" burner, turn off burner and carefully check for proper installation of burner media, vent system and
proper pilot flame impingement on burner. Burner Media must not block pilot flame. Vent system must be leak proof.

ATTACHING LPG CONVERSION LABELS AND HIGH ALTITUDE DERATION LABEL
Two printed informational labels are included with the LPG Conversion Kit. Attach these two labels to the back surface of
the Serial Number Plate that is located in the convection air cavity below the firebox. If you are derating this appliance at a
high altitude, also attach the High Altitude Deration Label, supplied in the Owner’s Manual Packet, to this same surface.
Prior to attaching the labels, fill in all the information that is requested in these labels.

For installations from 610-1370 meters (2000-4500 ft.) the orifice size (DMS) for natural and propane gas are _31_ and
_49_, respectively. See data plate for additional information. For high altitude installations consult the local gas distribu­tor or the authority having jurisdiction for proper rating methods. If the installer must convert the unit to adjust for varying
altitudes, the information sticker must be filled out by the installer and adhered to the appliance at the time of conversion.

«Cet appareil est equipé pour des altitudes compries entre 0 et 2000 pieds (0-610 m) seulement»
This appliance has been converted for use at an altitude of ______________
Orifice size _______________ Manifold Pressure ________________
Input (Btu/h)_______________ Fuel Type _______________________
Date of conversion _________ Converted by _____________________
«Cet appreeil a été converti au ____
Injecteur ________
Pression à la tubulure d'alimentation _____________
Déoit calorifique ______________

WARNING
DO NOT PROCEED WITH OPERATION OF THIS FIREPLACE
UNLESS BURNER "CYCLES" ON/OFF WITHOUT DELAYS!

PAGE 62

85-03-00923 ML47

ML47 VALVE ASSEMBLY REPLACEMENT PARTS

ML47 VALVE ASSEMBLY REPLACEMENT PARTS LIST

ITEM

QTY

PART
NUMBER

DESCRIPTION

1 1 05-04-00062

Pilot Assembly

2 2 65-14-00180

ORIFICE, 1/8”

3 1 HA-90-00004

Proflame Valve Assembly with fittings

4 1 55-02-00070

TUBING, 3/8" OD X 12 SS 304

Figure 4: ML47 VALVE ASSEMBLY

PAGE 63

85-03-00923 ML47

ML47 GAS IGNITION SYSTEM WIRING DIAGRAM

PAGE 64

85-03-00923 ML47

GLASS FRAME ASSEMBLY REPAIR AND REPLACEMENT

TO REPLACE DAMAGED GLASS
Bend Glass Retainer Tabs up 90 degrees. Four tabs hold down the glass and gasket assembly.
Remove the damaged glass and gasket material. Clean the inner surface of the glass frame.
Assemble new gasket on glass edge starting with the bottom left corner. The adhesive on the gasket should make con­tact with the glass surface. Use tracer lines in gasket to determine where the glass should sit on the gasket surface. See
Figure 6.
Place glass and gasket assembly in glass frame and carefully bend down glass retainer tabs. Extra glass retainer tabs are
provided should any originally used tabs break off.
The glass frame assembly and its individual components are available through Johnson Gas Appliance Company. Con-

tact your dealer for more detailed ordering information.

Figure 6

GLASS FRAME ASSEMBLY # HA-90-00102
REPLACEMENT PARTS LIST

ITEM

PART NUMBER

DESCRIPTION

1

HA-90-00103

FRAME, WELDMENT,
GLASS, ML47

2

65-02-00103

GASKET, TADPOLE,
3/8”BULB, 3/4” TAIL

3

65-06-01352

GLASS, CERAMIC, ML47

WARNING
Do not operate this appli­ance with the glass re­moved, cracked or broken.
Glass should be replaced
by a licensed or qualified
person.

WARNING
Use only authorized parts and
materials obtained from Johnson
Gas Appliance Company when
replacing defective or damaged
glass.

DO NOT substitute other manufac­turer's materials or components.
DO NOT operate unit with cracked,
broken or missing glass.
DO NOT abuse the glass door by
striking the glass, slamming the
door shut, etc

USE LARGE PLIERS TO
BEND DOWN (4) TABS

AS SHOWN

GLASS

GASKET

Figure 22

GLASS

GLASS

TAB #2

TAB #3

TAB #4

GASKET

GLASS

TRACER LINES

IN GASKET

GLASS SHALL SIT BETWEEN
TRACER LINES IN GASKET

ROTATE GASKET UP

SO ADHESIVE MAKES
CONTACT WITH GLASS
SURFACE

ADHESIVE

GASKET

GASKET IN

FLAT FORM

Figure 24

PAGE 65

85-03-00923 ML47

LISTING LABEL INFORMATION

The model information regarding your specific appliance can be found on the rating plate, which is located in the air gap
below the glass frame near the center. When contacting your dealer for any cleaning service or warranty service, always
provide the Model Number, Serial Number and Manufactured Date. This information will expedite the warranty verification
process.

PAGE 66

85-03-00923 ML47

Warranty Qualification and Service

The following information verifies proper installation and operation of your Mendota fireplace. All installation and operating
instructions must be carefully followed. This Mendota fireplace must be installed and serviced by a qualified installer, ser­vice agency, or the gas supplier.

FINAL INSTALLATION AND HOMEOWNER CHECKLIST

❑ INSERTS ONLY: The existing woodburning fireplace and its chimney system are structurally sound, professionally cleaned,

intact and remain woodburning capable (inserts only).

❑ INSERTS ONLY: Woodburning chimney interior and chimney top cap are inspected and repaired or replaced if damaged.
❑ No offensive odor emitting materials exist around appliance such as low temp rated adhesives, plastics or others.
❑ All surrounding finishing materials are conforming to manual requirements.
❑ Electrical power supply system conforms to NEC and local electrical codes.
❑ Gas supply must conform to national and local building codes.
❑ All gas line joints were checked for leaks using gas leak detector solution or a gas sniffer.
❑ All internal gas plumbing joints were checked for leaks using gas leak detector solution or a gas sniffer.
❑ Glass gasket was inspected and verified that it is sealing properly.
❑ Gas supply line was bled of air and pilot flame was ignited.
❑ Pilot flame overlaps burner flame propagation ports properly.
❑ Burners light and flames travel promptly along entire length of burner.
❑ Logs/media are installed properly per installation instructions.
❑ Burner(s) air shutter is adjusted properly. Shutter opening set properly per installation manual.
❑ Burner flames are “stable” and are not “lifting” off burner.
❑ Inform owner that an initial curing step is required. Read and follow Mendota Fireplace and Insert Curing Instructions

(found on unit and in owner’s manual). Smoke will emit during initial curing step.

❑ Provide owner with contents of owner’s manual packet.

• Owner’s manuals, remote control transmitter, glass latch tool, backup battery system, etc.

❑ Train owner how to remove and reinstall decorative front.
❑ Train owner how to remove and properly reinstall glass door.
❑ Inform owner about the glass safety screen barrier requirement.
❑ Train owner on remote control functions.

• Inform owner about IPI and CPI mode and that CPI shall be used for winter months.

• How to light the pilot light.

• How to light the main burners and how to control the flame height.

• How to turn the fan on and how to control fan speed.

• How to turn light on and how to control light brightness.

• How to turn the rear burner on and off.

• Explain manual mode operation.

• Explain thermostatic modes operations.

❑ Train owner about lockout mode and how to reset it.
❑ Train owner how to use backup battery system and operate appliance during power outage.
❑ Train owner about master switch location and emergency shutoff function.
❑ Train owner how to operate manual shutoff gas valve using glass latch tool.
❑ Inform owner that periodic maintenance of this unit is required per manual.

WARNING: MENDOTA GAS FIREPLACES ARE HEAT PRODUCING APPLIANCES. KEEP CHILDREN AND
FURNITURE A SAFE DISTANCE AWAY TO PREVENT PROPERTY DAMAGE, PERSONAL INJURY OR LOSS OF LIFE.

I have trained and informed homeowner of all the requirements listed above.
Staff Name_______________________________________ Staff Signature Date_________________________________

Homeowner’s Name_______________________________ Homeowner’s Signature Date__________________________

PAGE 67

85-03-00923 ML47

Warranty Policy Statement

Mendota Fireplace, a division of Johnson Gas Appliance Company, extends this Limited Lifetime Warranty to the original
purchaser of this appliance provided the product remains in the original place of installation. The items covered by this
limited warranty and the period of such coverage is set forth in the table below.

Some conditions apply (see below).
The policy is not transferable, amendable or negotiable under any circumstances.

Description

Lifetime

3 years

Parts Coverage

2 years

1 year

90 days

Firebox and Heat Exchanger

STD

Glass-thermal (breakage only)

STD

Stainless Steel Burner Tubes/Ceramic Burners

STD

All Castings

EXT

STD

Valve Assembly and all gas control components
(Pilot Assembly, Flame Sensor, Spark Electrode,
Pilot Tubing, Orifices, Thermocouple, Thermopile)

EXT

STD

All other Electrical Components
(Ignition Control Boards, Wiring, Switches, Blowers,
Blower Control Module, Battery Pack)

EXT

STD

Venting/Venting Components

EXT

STD

Remote Control Transmitter

EXT

STD

Exterior Painted Finishes

EXT

STD

Exterior Plated Finishes

EXT

STD

Brick Panels and Log Sets
(coloration failures only)

EXT

STD

All Firebox Media
(Glass Beads, Ceramic Stones, Tumbled Marble)

EXT

STD

All hardware

EXT

STD

Mesh/Glass Safety Barriers

EXT

STD

Enamel Panels

STD

Accent Light Bulbs

STD

STD

= Mendota Standard Warranty

EXT

= Mendota Extended Warranty With Registration

PAGE 68

85-03-00923 ML47

Conditions

Warranty protects against defect in manufacture or Mendota factory assembled components only, unless herein spec-

ified otherwise.

It remains the full responsibility of the owner to operate this appliance within the guidelines provided in the Installation

and Operating Instructions Manual accompanying this appliance. Further, the owner shall bear full responsibility
to enforce clearances to combustibles requirements and cautioning others about hot glass surface and hot metal
surfaces.

Owner by operating this appliance accepts that this is a heat producing appliance which has glass and steel parts that

are hot enough to cause severe burns. Owner accepts that this appliance requires close monitoring of children
and vulnerable individuals who are in the vicinity of this appliance when it is in operation. Mendota does not as­sume or accept any liability claims for burns or other physical or material damages resulting from touching hot
glass surface and hot metal surfaces that are part of this appliance or other adjacent object such as hearth pads
and mantels that may heat up during operation of this appliance.

Any part(s) found to be defective during the warranty period as outlined above will be repaired or replaced at Men-

dota’s option through an accredited distributor, dealer or pre-approved and assigned agent provided that the de­fective part is returned to the distributor, dealer or agent for inspection if requested by Mendota. Alternatively,
Mendota may at its own discretion fully discharge all of its obligations under the warranty by refunding the verified
purchase price of the product to the original purchaser. The purchase price must be confirmed by the original Bill
of Sale.

The authorized selling dealer, or an alternative authorized Mendota dealer if pre-approved by Mendota, is responsible

for all in-field diagnosis and service work related to all warranty claims. Mendota is not responsible for results or
costs of workmanship of unauthorized Mendota dealers or agents in the negligence of their service work.

At all times Mendota reserves the right to inspect reported complaints on location in the field claimed to be defective

prior to processing or authorizing of any claim. Failure to allow this upon request will void the warranty.

All warranty claims must be submitted by the dealer servicing the claim, including a copy of the Bill of Sale (proof of

purchase by you). All claims must be complete and provide full details as requested by Mendota to receive con­sideration for evaluation. Incomplete claims may be rejected.

Unit must be installed according to all manufacturers’ instructions as per the manual by a Mendota authorized dealer,

an authorized dealer technician or an authorized service person only.

All Local and National required codes must be met.
The installer is responsible to ensure the unit is operating as designed at the time of installation.
The original purchaser is responsible for annual maintenance of the unit, as outlined in the owner’s manual. As out-

lined below, the warranty may be voided due to problems caused by lack of maintenance.

Repair/replacement parts purchased by the consumer from Mendota after the original coverage has expired on the

unit will carry a 90-day warranty, valid with a receipt only. Any item shown to be defective will be repaired or re­placed at our discretion. No labor coverage is included with these parts

Exclusions

1. This Limited Lifetime Warranty does not extend to paint, rust or corrosion of any kind due to a lack of mainte­nance or improper venting, combustion air provision, corrosive chemicals (i.e. chlorine, salt, air, etc.), door or
glass gasketing.

2. Discoloration and some minor warping are normal, not a defect and therefore not covered under this warranty.
The installer must insure the unit is burning as per the rating tag at the time of installation. Over-firing (operation
above the listed BTU rating of this unit can cause serious damage and will nullify this warranty.

3. Mendota will not cover the cost of the removal or re-installation of hearths, facing, mantels or other components.

4. This warranty does not cover dealer travel costs for diagnostic or service work. All labor rates paid to authorized
dealers are subsidized, pre-determined rates. Dealers may charge homeowner for travel and additional time be­yond their subsidy.

PAGE 69

85-03-00923 ML47

5. Damages to plated surfaces caused by fingerprints, scratches, melted item or other external sources left on
plated surfaces from the use of cleaners other than denatured alcohol is not covered by this warranty.

6. Mendota is free of liability for any damages caused by the appliance, as well as inconvenience expenses and ma­terials. Incidental or consequential damages are not covered by this warranty.

7. Exclusions to this warranty include: injury, loss of use, damage, failure to function due to accident, negligence,
misuse, improper installation, alteration of the manufacturer’s setting of components, lack of proper and regular
maintenance, damage incurred while the appliance is in transit, or by act of God.

8. Malfunction, damage or performance based issues of any and all components as a result of environmental condi­tions, location, chemical damages, downdrafts, installation error, installation by an unqualified installer, incorrect
chimney components (including but not limited to cap size or type), operator error, abuse, misuse, use of im­proper fuels, lack of regular maintenance and upkeep, acts of God, weather related problems from hurricanes,
tornados, earthquakes, floods, lightning strikes/bolts or acts of terrorism or war, which result in malfunction of the
appliance are not covered under the terms of this Limited Lifetime Warranty.

9. Mendota has no obligation to enhance or modify any unit once manufactured (i.e. as products evolve, field modifi­cations or upgrades will not be performed on existing appliances).

10. Any unit showing signs of neglect or misuse will not be covered under the terms of this warranty policy and may
void this warranty. This includes units with rusted or corroded fireboxes which have not been reported as rusted
or corroded within three (3) months of installation/purchase.

11. Units which show evidence of being operated while damaged, or with problems known to the purchaser and caus­ing further damages will void this warranty.

12. Units where the serial no. has been altered, deleted, removed or made illegible will void this warranty.

13. Noises due to minor movement, expansion and contraction of the steel is normal and is not covered under the
terms of this warranty.

14. Freight damages for products or parts are not covered under the terms of the warranty.

15. Products made or provided by other manufacturers and used in conjunction with the Mendota appliance without
prior authorization from Mendota may void this warranty.

Limitations of Liability

The original purchaser’s exclusive remedy under this warranty, and Mendota’s sole obligation under this warranty,

express or implied, in contract or in tort, shall be limited to replacement, repair, or refund, as outlined above. In
no event will Mendota be liable under this warranty for any incidental or consequential commercial damages or
damages to property. To the extent permitted by applicable law, Mendota makes no express warranties other
than the warranty specified herein. The duration of any implied warranty is limited to duration of the expressed
warranty specified above. If implied warranties cannot be disclaimed, then such warranties are limited in duration
to the duration of this warranty.

Some U.S. states do not allow limitations on how long an implied warranty lasts or allow exclusion or limitation of
incidental or consequential damages, so the above limitations or exclusions may not apply to you.

Customers located outside the U.S. should consult their local, provincial or national legal codes for additional
terms which may be applicable to this warranty.

PAGE 70

85-03-00923 ML47

How to Obtain Warranty Service

1. If you discover a problem that you believe to be covered by the warranty, you must report to your Mendota Dealer
within 30 days, with proof of purchase, purchase date, model name and serial number.

2. Customers should contact the authorized selling dealer to obtain warranty service. In the event the authorized
selling dealer is unable to provide warranty service, please contact Mendota by mail at the address listed below.
Please include a brief description of the problem and your address, email and telephone contact information. A
representative will contact you to plan for an inspection and/or warranty service.

Warrantor:
Johnson Gas Appliance Company
Mendota Fireplace Division
520 E Avenue NW, Cedar Rapids, IA 52405, USA

Owner Registration

After installation, Mendota fireplace owners must register with Mendota to qualify for the Lifetime Limited Warranty within
30 days. Product registration will activate your Lifetime Limited Warranty.

Owners should complete the forms available at:

mendotahearth.com/warranty

Note: Your Mendota dealer can assist with warranty applications and information.

PAGE 71

85-03-00923 ML47

PAGE 72

85-03-00923 ML47

Johnson Gas Appliance Company

520 E Avenue NW

Cedar Rapids, Iowa 52405

Mendota Warranty Registration