Mendota FV46 Service manual

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FULLVIEW DIRECT VENT GAS FIREPLACE HEATER
Model FV46
INSTALLATION INSTRUCTIONS MANUAL
DOCUMENT NO. FV46-IM-0412
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 dam-
age, 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 neighbor's
phone. Follow the gas supplier’s instructions.
•If you cannot reach your gas supplier, call the fire
department.
•Installation and service must be performed by a
qualified installer, service agency or the gas suppli-
er.
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 min-
imum 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 vape-
rurs 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, appe-
lez le service dos incendies.
•L'installation et service doit être exécuté par un quali-
fié installer, agence de service ou le fournisseur de gaz.

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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 proper-
ty 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 suppli-
er must perform installation and service.
Do not store or use gasoline or other flammable va-
pors and liquids in the vicinity of this or any other ap-
pliance. 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 fire-
place. This fireplace is designed as a supplement
heat source. It is advisable to have an alternative pri-
mary 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 per-
manently 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. This appliance is not con-
vertible for use with other gases, unless a certified kit is
used.
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
certifié est installé.
SAFETY AND WARNING INFORMATION
READ and UNDERSTAND all instructions carefully before starting the appliance. FAILURE TO FOLLOW these instruc-
tions 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 instruc-
tions 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. L’installation et la réparation devrait être confiées à un technicien qualifié. L’appareil devrait faire l’objet d’une inspec-
tion par un technicien professionnel avant d’être utilisé et au moins une fois l’an par la suite. Des nettoyages plus
fréquents peuvent être nécessaires si les tapis, la literie, et cetera produisent une quantité importante de poussière. Il est
essentiel que les compartiments abritant les commandes, les brûleurs et les conduits de circulation d’air de l’appareil
soient tenus propres.
Do not use this appliance if any part has been under water. Immediately call a qualified service technician to inspect the
heater 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

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Always KEEP the appliance clear and free from combustible materials, gasoline, and other flammable vapors and
liquids.
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 con-
tact avec la surface chaude. Il est recommandé d’installer une barrière physique si des personnes à risques habitent la maison. Pour
empêcher l’accès à un foyer ou à un poêle, installez une barrière de sécurité; cette mesure empêchera les tout petits, les jeunes
enfants et toute autre personne à risque d’avoir accès à la pièce et aux surfaces chaudes.
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 chim-
ney 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 installa-
tion.
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 at the beginning of each heating season.
DO NOT place furniture or any other combustible household objects within 36 inches of the fireplace front.
This vented gas fireplace heater is not for use with air filters”.Foyer au gaz à évacuation.- Ne pas utiliser avec du combus-
tible solide.
Keep burner and control compartment clean. See installation and operating instructions accompanying appliance."
S'assurer que le brûleur et le compartiment des commandes sont propres. Voir les instructions d'installation et
d'utilisation qui accompagnent l'appareil.
WARNING: Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage.
Refer to the owner’s information manual provided with this appliance. For assistance or additional information consult a
qualified installer, service agency or the gas supplier.”"L'AVERTISSEMENT: L'installation inconvenante, ajustement,
modification, service ou entretien peut causer le dommages de propriété ou blessure. Référer au manuel d'information de
propriétaire fourni cet appareil. Pour l'assistance ou information supplémentaire consulte un qualifiée installeur, agence
de service ou le fournisseur de gaz.

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TABLE OF CONTENTS
SAFETY AND WARNING INFORMATION.................................................................................................................................................2
FV46 FULL VIEW GAS FIREPLACE DIMENSIONS..................................................................................................................................6
TECHNICAL SPECIFICATIONS FOR FV46..............................................................................................................................................7
CONGRATULATIONS................................................................................................................................................................................8
Building Permit and Installation Inspection Approval Requirements...........................................................................................................8
GENERAL APPLIANCE SPECIFICATIONS ..............................................................................................................................................9
MANTEL CLEARANCES..........................................................................................................................................................................10
CLEARANCES TO COMBUSTIBLES FROM APPLIANCE SURFACES.................................................................................................11
PLANNING THE INSTALLATION ............................................................................................................................................................12
ROUGH FRAMING DIMENSIONS...........................................................................................................................................................13
FRAMING DEPTH and FINISHING GUIDES...........................................................................................................................................14
HEARTH PROTECTION PAD REQUIREMENTS....................................................................................................................................16
GENERAL INFORMATION......................................................................................................................................................................17
GAS SUPPLY REQUIREMENTS.............................................................................................................................................................18
GAS PRESSURE REQUIREMENTS.......................................................................................................................................................19
GENERAL INSTALLATION INSTRUCTIONS..........................................................................................................................................20
GENERAL FLUE VENTING INSTRUCTIONS .........................................................................................................................................21
EXTERIOR VENT LOCATIONS AND RESTRICTIONS...........................................................................................................................22
FLUE VENTING COMPONENTS IDENTIFICATION ...............................................................................................................................23
FV46 MASTER FLUE VENTING REQUIREMENTS CHART...................................................................................................................24
IMPORTANT VENTING CONFIGURATION NOTES...............................................................................................................................25
APPROVED VENT SYSTEMS.................................................................................................................................................................26
ZERO RISE HORIZONTAL TERMINATION ............................................................................................................................................27
VERTICAL RISE HORIZONTAL TERMINATION.....................................................................................................................................28
VERTICAL THROUGH-THE ROOF VENTING ........................................................................................................................................30
VERTICAL THROUGH-THE-ROOF VENTING USING FOUR 900ELBOWS..........................................................................................32
FV46 DOOR OPERATION.......................................................................................................................................................................33
INSTALLATION CHECK OFF LIST..........................................................................................................................................................34
LIGHTING CHECK OFF LIST..................................................................................................................................................................34
FV46 LOG SET INSTALLATION INSTRUCTIONS..................................................................................................................................35
TROUBLE SHOOTING THE FV46 FIREPLACE & MAINTENANCE INFORMATION..............................................................................48
MAINTENANCE.......................................................................................................................................................................................49
NATURAL TO LP GAS CONVERSION....................................................................................................................................................51
LP GAS PRESSURE REQUIREMENTS..................................................................................................................................................55
FV46 VALVE ASSEMBLY REPLACEMENT PARTS...............................................................................................................................57
FV46 GAS IGNITION SYSTEM WIRING DIAGRAM................................................................................................................................58
GLASS FRAME ASSEMBLY REPAIR AND REPLACEMENT.................................................................................................................59
MENDOTA EXTENDED PROTECTION AND LIMITED WARRANTY .....................................................................................................63

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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.
a) 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:
1. If there is no carbon monoxide detector with an alarm already installed in compliance with the most cur-
rent 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.
2. 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 re-
quirements 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.
3. A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a min-
imum 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”
4. 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
edition 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 sepa-
rate 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 sat-
isfied:
1. The referenced “special venting system” instructions shall be included with the appliance or equipment in-
stallation instructions; and
2. The “special venting systems” shall be Product Approved by the Board, and the instructions for that sys-
tem 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 equip-
ment, 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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FV46 FULL VIEW GAS FIREPLACE DIMENSIONS
OVERALL APPLIANCE DIMENSIONS AND FEATURES

22 3/8
41
39 5/8
47 7/8
25 3/8 22
44
47 3/8
1"
FINISHING
GUIDE
DEPTH 39 7/8 OUTER GUIDES
38 in. INNER GUIDES
9 7/8"
3"
13 7/8"
4 7/8"
110 VAC
INLET
1/2" FNPT
GAS INLET
LIFT HANDLE (4)
5"X8" COAXIAL
VENT CONNECTOR
13
9 3/8
WALL RECEIVER &
LIGHT HARNESS
WOOD FRAMING
STANDOFF TOP
HEAT TRANSFER
DUCTS CONNECTION
PORTS
5"X8" COAXIAL
VENT STARTER
LIFT
HANDLE
LIFT
HANDLE
A
DETAIL A
1/2' FNPT
GAS INLET
WALL RECEIVER
HARNESS
110 VAC
INLET
1 9/16" MAX.
HEARTH THICKNESS
34-7/8" INNER
GUIDEHEIGHT
35-3/4" OUTER
GUIDE HEIGHT
ACCENT
LIGHT
REAR BURNER
AIR SHUTTER
CONTROL
FRONT BURNER
AIR SHUTTER
CONTROL
NON-COMBUSTIBLE
ZONE
VIEWING GLASS SIZE
31-1/2" X 36-3/4"
[1158 SQ. IN.]
36 5/8

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TECHNICAL SPECIFICATIONS FOR FV46
MODEL FV46
High Fire - Adjustable to - Low Fire
BTUH. (MODEL FV-46) NAT. GAS 45,500 13,450
BTUH. (MODEL FV-46) LP GAS 45,500 15,840
NOTE: LPG CONVERSION KIT, #HA-88-0080, MUST BE PURCHASED
SEPARATELY TO CONVERT TO BURN LPG IN THIS FIREPLACE.
MAIN ORIFICE [0-2000ft (610 m)]: REAR BURNER: #37 NAT. GAS [1/16” L.P. GAS] – FRONT BURNER: #44 NAT. [#55 LP]
OVERALL EFFICIENCY: AFUE RATING = 72.8%, P.4 Heating Seasonal Efficiency = 76.9%,P.4 Fireplace Efficiency = 76.9%
P.4 Steady State Efficiency - HIGH = 76.1%, P.4 Steady State Efficiency – LOW = 72.4%
CO-AXIAL DIRECT VENT FLUE: ....... 5" INNER, 8" OUTER
TOTAL WEIGHT: ...................................325 POUNDS
SAFETY: ................................................AGA/CECERTIFIED IPI AUTO ELECTRONIC IGNITION SYSTEM
ACTIVATED WITH THERMOSTATIC REMOTE CONTROL.
APPLIANCE CERTIFICATION AND TESTING AGENCY
INTERTEK TESTING SERVICES, ICBO#AA647-4
Certified under ANSI Z21.88 (2009) •CSA 2-33 (2009) “Vented Gas Fireplace Heaters" not for use with solid fuel. Approved for bed-
room 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. MIN., 11" W.C. MAX.)
L.P. GAS: 11.0" W.C. (11" W.C. MIN., 13" W.C. MAX.)
ELECTRICAL REQUIREMENTS...........115 VOLT, LESS THAN 1.5 amps (for blower operation only)
APPROVED VENT SYSTEMS...............DURAVENT, SELKIRK, AMERIVENT, SECURITY
UNIT TO FLOOR 0in. (0mm) GLASS EDGE TO ADJACENT SIDEWALL 16in. (406 mm)
MINIMUM CLEARANCES TO COMBUSTIBLE CONSTRUCTION
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 55in. (1400 mm) VENT PIPE BOTTOM TO COMBUSTIBLES 1in. (25mm)
UNIT BOTTOM TO ROOM CEILING 72 in. (1829 mm)
8” MANTLE ABOVE FLOOR LEVEL 51-1/2 in. (1308 mm)
MINIMUM COMBUSTIBLE ROUGH FRAMING DIMENSIONS
WIDTH = 48” (109cm) HEIGHT = 55” (119cm) DEPTH = 22-1/2” (49cm)
THIS FIREPLACE INCLUDES A SEALED COMBUSTION SYSTEM, 19-PIECE CERAMIC FIBER LOG SET & COALS, (FIREBRICK
OPTIONAL) LINED FIREBOX, NEO-CERAM GLASS, ELECTRONIC IGNITION SYSTEM, DUAL BLOWERS, AGA CERTIFIED
SAFETY SYSTEM, ACCENT LIGHT and THERMOSTATIC REMOTE CONTROL.
OPTIONS: BLACK, VINTAGE IRON, SWEDISH NICKEL, ANTIQUE COPPER and BRUSHED CHROME decorative fronts and other
accessories.
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 Cana-
da.
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.
WARNING: Do not operate this appliance with the glass removed,
cracked or broken. A licensed or qualified person should do re-
placement of glass.
HIGH ALTITUDE INSTALLATION INFORMATION: Prior to installing at altitudes higher than 7500, please con-
tact the Mendota technical service department for specific venting requirements and venting restrictions.

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CONGRATULATIONS
You are the owner of a world-class heat producing 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 a true heating appliance incorporating modern aesthetics of fire viewing with the controlla-
bility and fuel efficiency of a home gas furnace. Of particular interest is the low fuel consumption and brilliant fire viewing
afforded by the high efficiency 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 is a powerful and efficient heating unit. It has been designed as a major source of supple-
mental heat. As with any mechanical appliance there can be component shut downs. It is advisable to have an alternate
heat supply.
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 com-
partments, 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 quali-
fied 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 ap-
proved 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 employ-
ees or representatives for any damages caused by an inoperable, inadequate, or unsafe condition which is the result, ei-
ther 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 con-
tact the Mendota technical service department for specific venting requirements and venting restrictions.

9 | Page
FV46-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.
22-1/2" MIN.
DEPTH
9-3/8" TO VENT
PIPE CENTER
36-5/8"
NON-COMBUSTIBLE ZONE
18" min. Non-combustible Hearth
protection required [SEE HEARTH
PROTECTION PAD R-RATING, PAGE 12]
11
2" HEARTH PAD HEIGHT
(MIN R-1 RATING)
IS REQUIRED!
48" MIN
OPENING WIDTH
51-1/2" MIN.
UNIT BASE
TO 8" MANTEL
8" MANTEL DEPTH
AT HEIGHTS SHOWN
72" MIN.
TO
ROOM CEILING
CEILING
55" MIN.
ROUGH FRAMING
HEIGHT
48" MIN.
ROUGH FRAMING WIDTH
47"
TO CENTERLINE
OF VENT CAP
24" MIN
TO VINYL SOFFIT
(18" MIN TO WOOD
OR METAL SOFFIT)
16"
TO GUIDE EDGE
MINIMUM ROUGH FRAMING DIMENSIONS
HEIGHT 55"
WIDTH 48"
DEPTH 22-1/2"
FROM UNIT BASE
TO ROOM CEILING 72"
FROM UNIT BASE
TO 8" MANTEL 51-1/2"
ADJACENT WALLS:
A wall perpendicular to and in front of this fireplace's
glass door surface must be at least 16 inches from the
side edges of the facing guide.
A wall at 45° to the glass surface and starting at this
Fireplace's outer edge is permitted. Projections behind
this wall (in shaded area) are permitted.
57-1/2"
57-1/2"
81-1/2"
19-5/8"
19-5/8"
55" MIN.
40-3/4"
39-5/8"
22-1/2"
FROM UNIT BASE TO
UNIT ENCLOSURE CEILING 55"
55" MIN.
UNIT FLOOR
TO ENCLOSURE
CEILING

10 | Page
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, at right, shows the Distance from Fireplace Face the combustible mantel may pro-
trude outward at a Distance up From 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 30 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.
Mantel Clearances

11 | Page
CLEARANCES TO COMBUSTIBLES FROM APPLIANCE SURFACES
Clearances to Combustibles
0" CLEARANCE
FROM TOP STANDOFFS
1/2" CLEARANCE
FROM BACK
1/2" CLEARANCE
FROM SIDES

12 | Page
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 walls.
703
4"
57-1/2"
19-5/8" 19-5/8"
48" MIN.
ROUGH FRAMING
WIDTH
27-5/8"
48" MIN.
ROUGH
FRAMING WIDTH
22-1/2"
In addition to these dimensions, also reference:
Mantel Clearances Section
Framing Dimensions Section
Venting Configuration Section
22-1/2"
MIN.
40-3/4"
48" MIN.
WARNING
FIRE RISK- ODOR RISK
•Install appliance on hard metal or wood surfaces extending full width and depth of this fireplace.
•An R-1 Rated Hearth Protection Pad [1-1/2” Thick Maximum] is required unless this fireplace is elevated.
For every 1” this fireplace is elevated, you may reduce the hearth pad depth by 1”. If this fireplace is ele-
vated 6” or higher no hearth protection pad is required.
•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.

13 | Page
ROUGH FRAMING DIMENSIONS
Rough Framing Dimensions
The Rough Framing Dimensions must be main-
tained to allow this fireplace to slide into the fram-
ing cavity with a 900elbow installed on the top
starter collar. After the FV46 Fireplace is inserted
into the rough framed cavity, install one 2x4 on
each side adjacent to the side of this fireplace’s
body and one 2x4 on top of the top framing
standoffs to close the air gap and to act as nailing
studs for finishing materials.
If the fireplace is to be recessed in a cavity deeper than 22-1/2”, 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 un-faced 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.
43-7/8"
FINALIZED
WIDTH
48"
FINALIZED
HEIGHT
REMOTE RECEIVER
MOUNTING BOX
(2-GANG BOX)
Minimum Rough Framing Dimensions
DESCRIPTION
DIMENSION (INCHES)
A
Width
48”
B
Height
55”
C
Depth
22-1/2” (22” Granite/Marble Facing)
D
Vent opening height
10-3/4”
E
Vent opening width
10-3/4”
FINALIZED Framing Dimensions
47"
FLOOR TO
WALL THIMBLE
CENTER
22-1/2"
MIN. DEPTH

14 | Page
INNER FINISHING
GUIDES(TOP, L &R)
OUTER FINISHING
GUIDES (TOP, L & R)
FRAMING DEPTH and FINISHING GUIDES
The framing depth for this fire-
place is 22-1/2 inches. This is a
fixed depth required for all in-
stallations, except a corner in-
stallation and for installations
that use solid Granite or Marble
slabs as fascia materials. For
corner installations, General
Appliance Specifications and
Planning The Installation sec-
tions in this Manual.
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 fire-
place and the drywall.
Finishing Guides
Two sets of Finishing Guides are supplied with this fireplace: One set is called the Outer Guide and the other set is called
the Inner Guide. Both guides protrude out 1” from the face of this fireplace. Both guides are factory secured using screws
and may be removed if not needed or may be permanently attached using 1/8” rivets that are supplied with this fireplace.
Inner Guide: Identify the Inner Finishing Guides (Top,
Left and Right). These guides should be used as a
guide for finishing materials if you are planning to in-
stall this fireplace as a “FULL VIEW” without any deco-
rative front or if you are planning to install a
“TRADITIONS GLASS FRAME OVERLAY” or a
“PIONEER SCREEN DOOR KIT”. Remove and dis-
card the Outer Guides (Top and sides) if you plan to
use the Inner Guides.
Outer Guide:
Identify the Outer Finishing Guides (Top, Left and Right). These guides should be used as a guide for fin-
ishing materials if you are planning to install a "BENTLEY", “HOMESTEAD” or “WILLOW” door kit on this fireplace. Re-
move and discard only the Inner Guides (Top and Sides only) if installing a "BENTLEY", “WILLOW” or “HOMESTEAD”
door kit and you plan to use the Outer guides.
DECORATIVE FRONT TYPE INNER GUIDE OUTER GUIDE
FULL VIEW/ NO FRONT USE DISCARD
TRADITIONS OVERLAY USE DISCARD
PIONEER DOOR KIT USE DISCARD
BENTLEY DOOR KIT DISCARD USE
WILLOW DOOR KIT
DISCARD
USE
HOMESTEAD DOOR KIT
DISCARD
USE

15 | Page
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.
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:
Marble and Granite Slabs
Cement Boards used shall not contain any polymer based fibers or polymer materi-
als.
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 offgas
when hot.
In the area defined as “NONCOMBUSTIBLE
ZONE”, only NONCOMBUSTIBLE
MATERIALS ARE ALLOWED.
When this fireplace is installed in a framed
cavity that is 22-1/2” deep, the facing mate-
rial finishing guide will protrude out into
the room 1 inch. Build finishing materials to
1 inch thickness and use the built-in guides
for edge alignment of fascia material. Con-
sult section “FRAMING DEPTH and
FINISHING GUIDES”.
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!
NON-COMBUSTIBLE ZONE
[ALL HATCHED AREAS]
1.00 INCH
FACE
OF
FV-46
1" FINISHING
GUIDE
B
NON COMBUSTIBLE ZONE
[ALL HATCHED AREAS]
WARNING OF ODOR RISK
Cement Boards used shall NOT contain any
polymer based fibers or polymer materials
OR edge protective stickers.

16 | Page
18" min. Non-combustible Hearth
protection required [SEE HEARTH
PROTECTION PAD R-RATING, PAGE 12]
11
2" MAX. THICK HEARTH PAD
(MIN R-1 RATING) IS REQUIRED!
NOTE: For every 1" this fireplace is raised off the floor,
the non-combustible hearth protection pad may be reduced
by 2". If this fireplace is raised off the floor more than 6",
No hearth protection pad is required.
FRONT
FIGURE 8
HEARTH PROTECTION PAD REQUIREMENTS
Hearth Protection R Rating: MINIMUM R-1 IS REQUIRED. USE OF A ½” THICK (MINIMUM) CEMENT BOARD
(Hardibacker, Wonderboard or other brand) plus ¼” thick mortar (ThinSet type) plus ¼” thick ceramic tile exceed the R-1
requirement. Use this as a reference, if in doubt. Natural Stones of 1” or greater thickness also exceed R-1 rating.
This fireplace is shipped with a Hearth Pad Guide Installed. The
purpose of the Hearth Pad Guide is to limit the height of the
Hearth Pad during installations. DO NOT build a Hearthpad that
is more than 1-1/2” thick. Doing so will not allow installation of
decorative fronts on this fireplace. After the Hearthpad is built,
remove the Hearth Pad guide and discard if you do not wish the
guide to be visible. In some instances, you will want the guide
left permanently, based on your aesthetic judgment.
Hearth Pad Guide- [Usage and Removal]
To remove the Hearth Pad Guide, first remove the Glass Frame.
Identify the plastic Rivet heads inside the fireplace body. Use a
sharp utility knife to pry or cut the plastic rivet head and rivet
base. Lift the Hearth Pad Spacer upwards and remove.
This fireplace may be installed in an elevated position by
creating an elevated deck and an appropriate framed en-
closure. NOTE: This fireplace may be elevated but MUST
allow a minimum of 72” distance between this fireplace’s
floor level and the room ceiling.
All hearth pads must be non-combustible (metal, brick, stone, or
mineral fiberboard). Do not use any combustible material to
protect the floor in front of this fireplace. For the FV46, the
hearth protection pad must be rated at R-1 minimum AND it
must extend 18 inches in front of the fireplace face if the FV46
fireplace is installed at floor level.
Use the following procedure to determine if a hearth pad meets
the requirements listed in this manual. Find the available values,
R, K or C and follow the formulae below to arrive at a R value.
R-value = Thermal Resistance
K-value = Thermal Conductivity
C-value = Thermal Conductance
Convert the specification to R-value;
a. If R-value is given, no conversion is needed.
b. If K-value is given with for a thickness (t) in inches:
T
K
R×= 1
...( 1 divided by K , then multiplied by thickness).
c. If C-value is given:
C
R1 =
…(1 divided by C).
Determine the R-value of the proposed hearth pad. For multiple
layers, add R-values of each layer to determine overall R-value. If
the overall R-value of the system is greater than R-1, then the
proposed hearth pad is acceptable.
Example:
Required minimum R value for hearth protection pad is R=1. The
proposed alternative is 1/4” tile with a C- factor of 1.25 over 1/8”
mineral board with a K-factor of 0.29. Determine if the proposed
layers will provide the minimum R=1 rating.
Step A.Use formula to convert C-factor of the ¼” tile to R-value.
R of the tile:
C
R1 =
= 1/1.25 = 0.80
Step B. Use formula to convert K-factor of mineral board to R-
value.
R of mineral board:
T
K
R×= 1
=1/0.29 x 0.125 = 0.431
Step C. Add R values of ¼” Tile and mineral board to get the
Total R-value of proposed alternative:
RTotal = Rtile + Rmineral board = 0.8 + 0.431 = 1.231.
Step D. Compare proposed system R = 1.231 to required R
of 1.0. Since R of proposed system is greater than the
required R=1, the proposed system is acceptable.
PRY or CUT RIVET HEAD USING A SHARP EDGE.
REPEAT FOR 4 RIVETS.

17 | Page
GENERAL INFORMATION
Your Mendota Gas Fireplace has a state-of-the-art co-axial direct vent, sealed combustion system. This advanced and highly
efficient system brings in outside air for combustion, has a separate exhaust vent and efficiently heats and re-circulates room air.
The Mendota system maintains high air quality, maximizes efficiency and assures proper operation in today's "air-tight" homes.
The FV46 Fireplace must be installed and serviced by a Mendota approved serviceperson. Any adjustments to burner, pilot,
logs or coal bed must be made by a Mendota approved service person. If pilot goes out, always wait five (5) minutes before
attempting to relight pilot.
SAFETY AND STRUCTURAL CONCERNS:
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 require-
ments. 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 1000ºSilicate Stove Sealant is used on the inner pipe joints of all Simpson DuraVent pipe components
and all adjustable pipe sections.
VENTING REQUIREMENTS:
The Mendota Direct Vent Fireplace may be placed within 18 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 extending the full width and depth of the appliance. An 8”
combustible mantel may be installed at a minimum of 16-5/8" above top of the heat outlet (51-1/2”) up from the floor level of this
fireplace) and no more than 8" out from wall at that height. Non-combustible (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.
A non-combustible hearth protector with a total insulation rating of R-1 is required when installing this fireplace directly on the
floor and must extend a minimum of 18" in front of the fireplace. For every 1 inch the fireplace is raised off the floor, the depth of
the hearth protector may be reduced by 2 inches. If fireplace is raised off the floor 6" or more, no hearth protector is required.
With its high heat output this Mendota Fireplace will heat a large area of your home if located properly to maximize heat/ air cir-
culation. Air movement options for maximizing heat circulation that can be considered are the continuous operation of central
heating furnace blowers or ceiling fans. The most efficient method for overall heat distribution within a single room is a
ceiling fan. The heat output of the Fireplace can be reduced to a low 13,000 BTUH by turning off the Rear Burner and reducing
flame height using the remote control. Blower can be turned down or turned off to reduce heat output.
HEATING PERFORMANCE:
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. We suggest installing this Mendota Fireplace a minimum of 12 inches above
the floor by utilizing an elevated hearth. This fireplace may be installed in an elevated position as long as 72 in. minimum dis-
tance is provided between the floor level of this fireplace and the room’s ceiling surface.
AESTHETIC CONSIDERATIONS:
ELECTRICAL REQUIREMENTS:
Electronic Ignition System, Dual Blowers and an Accent Light system are included in this Mendota Direct Vent Fireplace. These
devices require constant electrical power except during power outages. A 115-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 allowed.
Thermostatic function is included in the Remote Control Transmitter.
Therefore, no Thermostat wire is required.
A remote control receiver, a double-gang box and a 10 foot long
wire harness are supplied with this fireplace. Plan for mounting the
double-gang box at 4 feet above floor level on the left side of this
fireplace. Position remote receiver about 24 inches on the left side of
the fireplace. Do not attempt to locate the receiver on the right side
and do not route the 10 foot cable on top of this fireplace. The heat
REMOTE CONTROL RECEIVER LOCATION AND MOUNTING
REQUIREMENTS
43-7/8"
FINALIZED
WIDTH
48"
FINALIZED
HEIGHT
REMOTE RECEIVER
MOUNTING BOX
(2-GANG BOX)

18 | Page
on top of this fireplace will damage the 10 foot cable if you route the cable to the right side.
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 carefully check for gas leaks when hooking up the fireplace
-- check with soap & water solution.
•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 in-
let. Gas supply piping must enter the Fireplace cabinet on the left side.
An approved manual shut-off ball 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 ap-
proval 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 valve access cover box on left side of fireplace to access the gas valve and all
control components.
A qualified installer shall take pressure measurements at these ports to verify and set the correct inlet gas pressures dur-
ing 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 Supply and Electrical
Supply Inlets Locations
WARNING: Never use any type of pipe thread sealants or compounds on the seats of flare or compression connections.
9 7/8"
3"
13 7/8"
4 7/8"
110 VAC
INLET
1/2" FNPT
GAS INLET

19 | Page
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 pres-
sure 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!
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" regula-
tors 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.
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 facia material around this fire-
place.
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)
Gas Valve Pressure Test Ports

20 | Page
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 FV46 Fireplace is approved for
mobile home and bedroom installations.
CAUTION: The Mendota FV46 Fireplace may be installed in a manufactured (mobile) home after the first sale of the home. Manu-
factured 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 on page 10.
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 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 115-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 and all local and national codes are carefully followed.
IMPORTANT: Any safety screen, guard, glass, grill etc. removed for servicing this fireplace must
be replaced prior to operating this fireplace.
BLOWER OPERATION
The blower output 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.
Backup batteries are located inside the wall-
mounted remote receiver box. Change the batteries
at least once a year.
The FV46 Fireplace must be installed by a qualified service person.
Junction Box
9 7/8"
3"
13 7/8"
4 7/8"
110 VAC
INLET
1/2" FNPT
GAS INLET