Mendota FV34-ARCH-PF2 Service manual

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FULLVIEW ARCH DIRECT VENT GAS FIREPLACE HEATER
Model FV34-ARCH-PF2
INSTALLATION INSTRUCTIONS MANUAL
DOCUMENT NO. FV34-ARCH-PF2-IM-0516
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
an
y
g
as control
,
which has been under water.
AVERTISSEMENT: Assurez-vous de bien suivre les instruc-
tions 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 voisina-
ge 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 four-
nisseur.
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 fournis-
seur de
g
az.

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INITIAL STARTUP INFORMATION AND ADVICE
CAUTION: Before you ignite the pilot or burners, perform the following inspections and verifications:
Check glass gasket seal. Visually inspect glass gasket, especially at the corners of the glass piece. Gasket that bulges at
corners can cause improper seals between the bulges which can cause exhaust leaks and lead to acrid smell concerns.
If facing materials are freshly painted or freshly polished (in cases of marble or granite), make certain that the convection
blower is running at level 2 or level 3 during the first 1-1/2 hours of initial burn. After the 1-1/2 hours, turn off the convec-
tion blower and proceed with the paint curing cycle.
INITIAL BURN CYCLE: During the first burn cycle (approximately for 3 hours), it is normal for this appliance to emit visible
smoke and some odor. The smoke generated is a mixture of paint curing, lubricating oils burn off, glass gasket adhesive
curing and ceramic sealant gaskets curing. The smoke generated can trigger smoke and fire alarms. It is recommended to
open all door and windows during initial cure cycle.
PAINT CURING CYCLE RECOMMENDATION: It is recommended that you run this Fireplace on maximum flame height
with the Convection Blowers turned on at level 2 or level 3 for the first 1-1/2 hours. After the first 1-1/2 hours, turn OFF the
Convection blowers and proceed burning on high fire for 1 cycle of 2 hours ON and 2 hours OFF to cure the paint and
expel any burn off odors. Expect some visible smoke and smell during the curing cycle. Open all door and windows during
initial cure cycle.
BLOWER BREAK-IN PERIOD: The integrated blowers in this Insert may exhibit some bearing noise and electrical static
noise during the first few hours of operation. This is normal during the break-in period. The burner flames must be on dur-
ing these cycles.
PROPER PAINT TYPES APPROVED FOR USE: Industrial Acrylic Paints, Alkyd based Paints. When selecting Paint for
applications on facings, mantels, corbels or floors within 2 feet in front of a fireplace raised 6” or higher, avoid off the shelf
Paints which may have modifier additives used to increase “hiding” ability, accelerate drying times and curing times. Con-
sult with a reputable Paints and Sealants supplier and acquire Industrial Acrylic Paints or Alkyd based Paints.
PROPER SEALANTS TYPE APPROVED FOR USE: Heat resistant polyurethane sealants which are not damaged by
prolonged exposure to raised temperatures. Many are flame resistant, meaning that they resist ignition when exposed to
high temperatures and can insulate the substrate and delay damage to it. When selecting polyurethane for applications on
facings, mantels, corbels or floors within 3 feet in front of a fireplace, avoid off the shelf urethane Sealants which may
have modifier additives used to accelerate drying times and curing times. Consult with a reputable Paints and Sealants
supplier and acquire Heat Resistant Polyurethane Sealants.
ADDITIONAL APPLICATION CAUTIONS: If wood used around or in front of the fireplace has been chemically cleaned or
bleached prior to staining or painting, it is of the utmost importance to make certain that the cleaner or bleach does not
remain in the wood substrate under the final paint or sealant applied. If any cleaner or bleach remain within the wood
structure, application of heat from the fireplace, even low level heat, will cause the cleaner or bleach compounds to ex-
pand or evaporate causing separation of the paint or sealant from the wood surface and may cause peeling or bubbling of
the paint or sealant.
Moisture Content of the wood substrate is also of critical importance. High moisture content wood when heated will yield
evaporation of the moisture and hydraulic pressure under the paint or sealants which can lead to peeling or bubbling. Al-
ways select the lowest moisture content wood substrate. Store the wood substrate in an environment with 60-75 degrees
F and 35-55% relative humidity levels for a minimum of 48 hours before applying the Paint or Sealant.
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 at least
6” above floor level of the room. For every 1” this fireplace is elevated, you may reduce the hearth pad depth by
2”. If this fireplace is elevated 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. Construct
chase to all clearance specifications in manual.
Locate and install appliance to all clearance specifications in manual.
Verify glass gasket seal before firing unit the first time. Verify proper latching of glass frame onto unit body.

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LISTING LABEL INFORMATION
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.

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TABLE OF CONTENTS
INITIAL STARTUP INFORMATION AND ADVICE................................................................................................................2
LISTING LABEL INFORMATION...........................................................................................................................................3
SAFETY AND WARNING INFORMATION............................................................................................................................6
FV34-ARCH FEATURES - QUICK REFERENCE INFORMATION.......................................................................................8
SPECIFIC REQUIREMENTS FOR THE COMMON WEALTH OF MASSACHUSETTS.......................................................8
FV34-ARCH FULL VIEW GAS FIREPLACE DIMENSIONS ...............................................................................................11
TECHNICAL SPECIFICATIONS FOR FV34-ARCH............................................................................................................11
CONGRATULATIONS............................................................................................................................................................9
BUILDING PERMIT AND INSTALLATION INSPECTION APPROVAL REQUIREMENTS .................................................9
GENERAL APPLIANCE SPECIFICATIONS .......................................................................................................................13
PLANNING THE INSTALLATION........................................................................................................................................14
ROUGH FRAMING DIMENSIONS.......................................................................................................................................15
ROUGH FRAMING DIMENSIONS....................................................................................................................................15
CONSTRUCTING THE APPLIANCE CHASE...................................................................................................................15
BACKUP DC POWER INLET PORT INSTALLATION........................................................................................................17
FRAMING DEPTH AND FINISHING GUIDES.....................................................................................................................18
MAXIMUM THICKNESS OF FINISHING MATERIAL ALLOWED: ....................................................................................18
RECOMMENDED BACKING MATERIALS OVER NON-COMBUSTIBLE ZONES:..........................................................18
SUITABLE FACING BACKER MATERIALS AND HEARTH PROTECTION MATERIALS...............................................19
FINISHING MATERIALS INSTALLATION ..........................................................................................................................20
TILES AND FAUX ROCK...................................................................................................................................................20
MARBLE AND GRANITE SLABS......................................................................................................................................20
HEARTH PROTECTION PAD REQUIREMENTS................................................................................................................21
GENERAL INFORMATION..................................................................................................................................................22
GAS SUPPLY REQUIREMENTS.........................................................................................................................................23
GAS SUPPLY LINE SIZING ..............................................................................................................................................23
GAS PRESSURECHECKING REQUIREMENTS.............................................................................................................23
MANUAL GAS SHUTOFF VALVE INSTALLATION REQUIREMENT...............................................................................23
GAS PRESSURE REQUIREMENTS ...................................................................................................................................24
GENERAL INSTALLATION INSTRUCTIONS.....................................................................................................................25
GENERAL FLUE VENTING INSTRUCTIONS.....................................................................................................................26
EXTERIOR VENT LOCATIONS AND RESTRICTIONS......................................................................................................28
FLUE VENTING COMPONENTS IDENTIFICATION...........................................................................................................29
FV34-ARCH MASTER FLUE VENTING REQUIREMENTS CHART ..................................................................................30
IMPORTANT VENTING CONFIGURATION NOTES...........................................................................................................31
MAXIMUM HORIZONTAL RUN.........................................................................................................................................31
MAXIMUM VENT SYSTEM LENGTH................................................................................................................................31
USING 900ELBOWS.........................................................................................................................................................31
USING 900ELBBOWS WHEN THE INITIAL STARTER VERTICAL SECTION IS LESS THAN 5FEET ..........................31
USING 45-DEGREE ELBOWS..........................................................................................................................................31
APPROVED VENT SYSTEMS.............................................................................................................................................32
MINIMUM RISE (18”) WITH HORIZONTAL TERMINATION ..............................................................................................33
VERTICAL RISE HORIZONTAL TERMINATION................................................................................................................34
VERTICAL THROUGH-THE ROOF VENTING....................................................................................................................36
VERTICAL THROUGH-THE-ROOF VENTING USING FOUR 900ELBOWS.....................................................................38
FV34-ARCH DOOR OPERATION CHANGE PIC TO ARCH ..............................................................................................39
TO REMOVE DOOR..........................................................................................................................................................39
TO REPLACE DOOR ........................................................................................................................................................39

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INSTALLATION CHECK OFF LIST.....................................................................................................................................41
LIGHTING CHECK OFF LIST..............................................................................................................................................41
BLOWER SYSTEM INFORMATION....................................................................................................................................40
LOG SET INSTALLATION...................................................................................................................................................41
FLAME APPEARANCE ADJUSTMENT..............................................................................................................................53
AIR SHUTTER ADJUSTMENTS .......................................................................................................................................53
NATURAL TO LP GAS CONVERSION INSTRUCTIONS...................................................................................................54
ORIFICE SIZES REQUIREMENT:....................................................................................................................................54
LP PRESSURE REGULATOR CONVERSION INSTRUCTIONS .......................................................................................58
LP GAS PRESSURE REQUIREMENTS CHECK ALL NUMBERS.....................................................................................59
LPG PROPER INPUT RATES:..........................................................................................................................................59
LEAK TESTING REQUIREMENTS...................................................................................................................................59
PILOT FLAME AND MAIN BURNER RELATIONSHIP VERIFICATION............................................................................59
PILOT FLAME LENGTH ADJUSTMENT...........................................................................................................................59
GAS INPUT RATE VERICATION REQUIREMENTS CHECK NUMBERS.........................................................................60
REMOTE CONTROL TRANSMITTER FUNCTIONS...........................................................................................................61
REMOTE TRANSMITTER OPERATING INSTRUCTIONS...............................................................................................62
TEMPERATURE INDICATOR (OF OR OC) ..........................................................................................................................63
KEY LOCK FUNCTION........................................................................................................................................................63
LOW BATTERY POWER DETECTION ...............................................................................................................................63
OPERATING DURING POWER OUTAGES........................................................................................................................63
“FIRST TIME” PILOT LIGHTING INSTRUCTIONS.............................................................................................................64
INITIALIZING THE REMOTE CONTROL SYSTEM ..........................................................................................................64
IPI/STANDING PILOT SYSTEM INFORMATION................................................................................................................65
INTERMITTENT PILOT LIGHT AND STANDING PILOT LIGHT FEATURES...................................................................65
SETTING TO IPI VERSUS CPI MODE:.............................................................................................................................65
REPLACEMENT PARTS......................................................................................................................................................66
FV34-ARCH VALVE ASSEMBLY REPLACEMENT PARTS.............................................................................................66
FV34-ARCH GAS IGNITION SYSTEM WIRING DIAGRAM ...............................................................................................67
GLASS FRAME ASSEMBLY REPAIR AND REPLACEMENT CHANGE PART NUMBERS............................................68
TO REPLACE DAMAGED GLASS....................................................................................................................................68
MAINTENANCE AND DIAGNOSTICS HELPFUL HINTS CHANGE PIC ...........................................................................69
COMPONENTS LOCATION:.............................................................................................................................................69
TROUBLE SHOOTING THE FV34-ARCH FIREPLACE & MAINTENANCE INFORMATION............................................70
OVER FIRING OF BURNER..............................................................................................................................................70
MAINTAINING CORRECT PILOT-FLAME, PILOT OUTAGE &RELIGHTING.................................................................70
CLEANING VIEWING GLASS...........................................................................................................................................70
SOOTING..........................................................................................................................................................................70
OPERATION DURING POWER FAILURE........................................................................................................................70
GAS SHUTOFF PROCEDURES.......................................................................................................................................70
MAINTENANCE....................................................................................................................................................................71
ANNUAL MAINTENANCEOF MENDOTA UNITS IS REQUIRED. ...................................................................................71
PERIODIC INSPECTIONS REQUIRED:...........................................................................................................................71
NOTES MENDOTA WARRANTY QUALIFICATION & SERVICE REFERENCE FORM....................................................72
MENDOTA WARRANTY QUALIFICATION & SERVICE REFERENCE FORM.................................................................72
MENDOTA EXTENDED PROTECTION AND LIMITED WARRANTY................................................................................75

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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, to 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.
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.
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.

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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, 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 Flue Venting section of this manual.
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.
The vent system assembly for this fireplace must be periodically examined by a qualified service agency.
If the vent-air intake system is disassembled for any reason, reinstall per the instructions provided for the initial installa-
tion.
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 combustible 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.
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 underwater.
This appliance is for use with only doors certified by Mendota. Do not use any fronts or doors with this appliance unless
they are certified by Mendota and installed by a certified installer.

85-03-00988 8 | Page
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.

85-03-00988 9 | Page
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.
The Mendota Gas Fireplace is a true heating appliance incorporating the traditional aesthetics of fireplace fire viewing with
the controllability and fuel efficiency of a home gas furnace. Of particular interest is the low fuel consumption and brilliant
fire viewing afforded by the realistic HearthGlo wood fire-like 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, understand
the need for gas input Deration. Contact Mendota Technical Service for support.

85-03-00988 10 | Page
FV34-ARCH FEATURES - QUICK REFERENCE INFORMATION
EXTERNAL DIMENSIONS: 39-7/16” Wide X 40-7/16” High X 14-9/16” Deep
MINIMUM FRAMING DIMENSIONS: 40-5/8”” WIDE x 40-3/4” HIGH X 14-5/8” DEEP
GLASS SIZE: NeoCeram Glass with non-reflective coating. Visible Glass measures 685 in2 (29-1/2” W x 24-3/8” H).
MANTEL ALLOWANCE: 8” Deep Mantel at 20” Above Top Convection Opening
VENT SYSTEM ALLOWANCE: Top Vent Only. 4” exhaust and 6-5/8” combustion air intake coaxial vent pipe required.
18” Vertical Minimum with 6” max horizontal. 40 feet Vertical Maximum. 25’ maximum horizontal run allowed with 5’ min-
imum vertical starter section.
CONTROLS: IPI Electronic Ignition System with AC Primary Power and DC Backup Power. Accent light and Blower oper-
ate on AC Power only. Thermostatic Remote Control Transmitter with Smart Thermostat Mode included.
BLOWER SYSTEM: 105 CFM High Efficiency Motor Blower System. 120VAC, 2Amps. Dedicated Hot Power only. No
switches, Fan Speed Controls or Light Dimmers are allowed in same circuit.
ACCENT LIGHT SYSTEM: Accent Light System Included and can be turned on or off or dimmed using Remote Control
Transmitter.
BURNER SYSTEM: Dual 304 Stainless Steel Tubular burners.
BURNER AIR SHUTTER SYSTEMS: Externally controllable Rear Burner air shutter and Internal rotary Front Burner air
shutter.
LOG SET: 9-piece, Premium Definition Log Set with Extreme glow and realism ember bed.
REFRACTORY PANELS: Premium Detailed Red Clinker Fiber Brick Panels; Black, Copper, Mocha Enamel Panel Op-
tions.
NATURAL GAS INFORMATION: Factory equipped for Natural Gas. 5”WC Minimum inlet pressure required. For NG ap-
plications, Front Burner Orifice Size is #49 and the Rear Burner Orifice Size is #44.
LPG INFORMATION: LP conversion kit #HA-106-00023 is required. 12”WC Minimum inlet pressure required. For the
FV34-ARCH LPG application, both front are rear burner orifices are to be drill size 3/64”. For higher altitude, adjustment to
orifice size may be necessary.

85-03-00988 11 | Page
TECHNICAL SPECIFICATIONS FOR FV34-ARCH
High Fire - Adjustable to - Low Fire
BTUH. (MODEL FV34-ARCH) NAT. GAS 31,500 8,985
BTUH. (MODEL FV34-ARCH) LP GAS 31,500 12,627
NOTE: LPG CONVERSION KIT, HA-106-00023, MUST BE PURCHASED SEPARATELY
TO CONVERT TO BURN LPG IN THIS FIREPLACE.
MAIN ORIFICE [0-2000ft (610 m)]: REAR BURNER: #44 NG [3/64” L.P.] – FRONT BURNER: #49 NG [3/64“ LP]
........................[2000-4500ft (610-1370 m)]: REAR BURNER: #44 NG [3/64” L.P.] – FRONT BURNER: #49 NG [3/64” LP]
OVERALL EFFICIENCY: ..................... P.4 FE 74.45%
CO-AXIAL DIRECT VENT FLUE: ..........4" INNER, 6-5/8" OUTER
TOTAL WEIGHT: ...................................220 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 (2014) CSA 2-33 (2014) “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."
GLASS SAFETY BARRIER
A certified Glass Safety Barrier must be installed on this appliance during any use.
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
MINIMUM CLEARANCES TO COMBUSTIBLE CONSTRUCTION
UNIT TO FLOOR 0in. (0mm) INNER GUIDE EDGE TO ADJACENT SIDEWALL 16in. (40.5 cm)
UNIT TO ENCLOSURE SIDEWALL 1/2in. (13mm) VENT PIPE TOP TO COMBUSTIBLES 2in. (51mm)
UNIT TO ENCLOSURE BACK WALL 1/2in. (13mm) VENT PIPE SIDES TO COMBUSTIBLES 1in. (25mm)
UNIT TOP TO ENCLOSURE CEILING 1.5 in. (38 cm) VENT PIPE BOTTOM TO COMBUSTIBLES 1in. (25mm)
UNIT BOTTOM TO ROOM CEILING 72 in. (182.9 cm)
8” MANTLE ABOVE DISCHARGE AIR OPENING 20 in. (508 mm)
MINIMUM COMBUSTIBLE ROUGH FRAMING DIMENSIONS (allow extra clearance for vent system)
WIDTH = 40-5/8” (103.2 cm) HEIGHT = 40-3/4” (94 cm) DEPTH = 14-5/8” (37 cm)
THIS FIREPLACE INCLUDES A SEALED COMBUSTION SYSTEM, 9-PIECE PREMIUM CERAMIC FIBER LOG SET & COALS,
FIREBRICK OR ENAMELED LINER LINED FIREBOX, NEO-CERAM GLASS, ELECTRONIC IGNITION SYSTEM, 110 CFM
CONVECTION AIR BLOWER, AGA CERTIFIED SAFETY SYSTEM, ACCENT LIGHT and THERMOSTATIC REMOTE CONTROL.
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, understand
the need for gas input Deration. Contact Mendota Technical Service for support.

85-03-00988 12 | Page
22 3/4
GLASS FRAME
HEIGHT TO ARCH 1 1/2
FINISHING GUIDE
BOTTOM
33 11/16
FLOOR TO VENT
STARTER TOP
12 9/16
7 3/16
14 9/16
UNIT DEPTH
40 7/16
UNIT HEIGHT
39 7/16
UNIT WIDTH
MASTER SWITCH
SYNC SWITCH
DETAIL A
A
HEAT TRANSFER
DUCT KNOCKOUT
658" X 4" COAXIAL
STARTER COLLAR
32 1/4
ELECTRICAL SUPPLY INLET
110 VAC
HOT, NO SWITCH
DC BACKUP
POWER CORD
11 3/16
6 5/8
4 15/16
6 5/8
32 5/8
FINISHING GUIDE WIDTH
GAS SUPPLY INLET
12FNPT
R36 5/8
FINISHING GUIDE
RADIUS
27 1/16
FINISHING GUIDE
HEIGHT
23 1/4
FINISHING GUIDE
HEIGHT TO ARCH
31 1/2
GLASS FRAME
WIDTH
26 3/8
GLASS FRAME
HEIGHT
FV34-ARCH FULL VIEW GAS FIREPLACE DIMENSIONS

85-03-00988 13 | Page
2 X 4
STUDS
40 5/8
ROUGH FRAMING
WIDTH
40 3/4
ROUGH FRAMING
HEIGHT
HATCHED AREAS MUST BE COVERED WITH
NON-COMBUSTIBLE MATERIALS ONLY.
18" MIN.
11
72" MINIMUM
UNIT BASE TO CEILING
4858
UNIT BASE
TO 8" DEEP
MANTEL
8
5378"
UNIT BASE
TO VENT
CENTER LINE
958" UNIT
FACE TO
VENT
CENTERLINE
18" MINIMUM TO SOFFIT.
24" TO VINYL SOFFITS.
18"
HEARTH PAD
112" THICK
MAXIMUM
R-1 MINIMUM RATING REQUIRED. USE
OF 1/2" THICK R-1 BOard AS BASE
LAYER RECOMMENDED
MINIMUM REQUIRED DIMENSIONS
ROUGH FRAMING WIDTH 40-5/8"
ROUGH FRAMING HEIGHT 40-3/4"
ROUGH FRAMING DEPTH 14-5/8"
MINIMUM FINISHING MATERIALS TOTAL THICKNESS 1"
UNIT BASE TO ROOM CEILING MINIMUM DISTANCE 72"
MINIMUM DISTANCE TO 8" MANTEL ABOVE UNIT BASE 48-5/8"
14-58"
ROUGH FRAMING
DEPTH
40-58"
ROUGH FRAMING
WIDTH
16"
MINIMUM
TO SIDE
WALL
135°
ANY PROTRUSIONS IN
HATCHED AREA ARE
EXEMPTED AND ALLOWED.
16"
GENERAL APPLIANCE SPECIFICATIONS
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.
CAUTION: The distance from floor level to the centerline of the vent
cap is given based on Simpson Duravent GS components. If using
vent components of other brands do not assume that the
measurement given here is applicable. Verify the distance to
centerline of vencap by measuring the components you will be using.

85-03-00988 14 | 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 ceiling fan are desired.
Selecting Appliance Location
When selecting a location for your appliance, it is important to consider the required clearances to walls.
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 at
least 6” above floor level of the room. For every 1” this fireplace is elevated, you may reduce the hearth
pad depth by 2”. If this fireplace is elevated 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.
40-5/8" MIN.
ROUGH FRAMING
WIDTH
167
16"
145
8"
MIN
145
8"
MIN
167
16"
32.947 5
465
8"
657
8"40-5/8"
MIN
40-5/8" MIN
ROUGH
FRAMING
WIDTH
231
4"
185
16

85-03-00988 15 | Page
53-7/8"
FLOOR
TO
WALL
THIMBLE
CENTER
ROUGH FRAMING DIMENSIONS
Rough Framing Dimensions
The Rough Framing Dimensions must be
maintained to allow this fireplace to slide into
the framing cavity.
SPECIAL FRAMING NOTE: On the left side
of this unit, a metal box containing the igni-
tion system protrudes outward ½” and an
electrical cable clamp protrudes outward 1-
1/4”.
If the fireplace is to be recessed in a cavity deeper than 14-5/8”, 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.
Minimum Rough Framing Dimensions
DESCRIPTION DIMENSION (INCHES)
A Width 40-5/8””
B Height 40 3/4”
C Depth 14-5/8” (adjust/reduce based on finishing
material thickness desired)
D Vent opening height 10”
E Vent opening width 9”

85-03-00988 16 | Page
12
8
8
28 5/8
48 5/8
20
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 28-5/8” inches up from the floor level of this fireplace.
WARNING: Make proper use of this chart. Use a 1:1 Rise to Run ratio to calculate the required distance up based on
your mantel depth. 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
Clearances to Combustibles
1/2" CLEARANCE
FROM BACK
1/2" CLEARANCE
FROM SIDES
0" CLEARANCE FROM
TOP STANDOFFS

85-03-00988 17 | Page
BACKUP DC POWER INLET PORT INSTALLATION
Under normal conditions when AC power is availa-
ble, 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 addi-
tion, 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
right side of this appliance. The DC Power Inlet
harness is 6 feet long, allowing installation of the
single gang box up to 5 feet to the right of this appli-
ance. 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.

85-03-00988 18 | Page
FRAMING DEPTH and FINISHING GUIDES
The nominal framing depth for this fireplace is 14-5/8 inches. This is a fixed depth required for all installations, except a
corner installation and for installations that use solid Granite or Marble slabs or thick natural stone materials as fascia ma-
terials. For corner installations, see General Appliance Specifications and Planning the Installation Sections.
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.
FINISHING GUIDE
Only one set of Finishing Guides are supplied with this fireplace. Guides protrude out 1” from the face of this fireplace.
Guides are factory secured using rivets and may be removed by drilling through the rivets using 1/8” drill bits if not needed
or may be permanently left in place.
THICKNESS OF FINISHING MATERIAL ALLOWED:
A maximum 2 ½” thickness of material is allowed to be placed on top of the flat face of this fireplace and still allow all dec-
orative Fronts options to mount and function properly. If the total thickness of finishing materials on top of the flat face of
this appliance is to exceed 2 ½” the finishing guides that come with the decorative front must be used. For more infor-
mation on what finishing guides to use reference the instructions that come with the decorative front.
RECOMMENDED BACKING MATERIALS OVER NON-COMBUSTIBLE ZONES:
See R-Ratings tables provided in the next page.
Mendota recommends the use of ½” thick Mineral Fiber Boards or Ceramic Boards in the non-combustible zones as
backer material when you want a smooth painted finish around this fireplace. Select a backer materials which has an R-
value greater than R 1.0. Follow backer material manufacturer's instructions to apply drywall compound or cement com-
pounds to achieve the smooth finish.
For applications where you want a smooth painted plaster finish over the Mineral/Ceramic Board, cut to size and secure
metal lath screen to the top surface of the Backer board using 1” long screws which penetrate the screen, Backer board
and the combustible rough framing for this appliance and under the Backer Board.
For applications where you want to attach tiles or stone slabs to the Mineral/Ceramic Board, cut to size and secure metal
lath screen to the top surface of the Backer board using 1” long screws which penetrate the screen, Backer board and the
combustible floor structure under the Backer Board.
Proceed by applying ThinSet mortar (with no polymeric additives) which will
not off gas at high temperatures and place tiles or stone slab on the ThinSet
surface.
For Hearthpad applications where you want employ Marble, Granite, Stone
slabs or ceramic tiles, select a base backer board which has an R-Rating
greater than 1.0. Attach Marble, Granite, Stone Slabs or ceramic tiles on top
of the backer board you selected.

85-03-00988 19 | Page
SUITABLE FACING BACKER MATERIALS AND HEARTH PROTECTION MATERIALS
It is important to select the proper Facing Backer Material and proper Hearth Protection Material when installing this appli-
ance.
Definitions
Hearth Protection Pad: A non-combustible protective pad installed in front of this fireplace spanning the full width of the
glass door and extending into the room to a depth determined using the supplied chart based on the distance this fire-
place is raised up from the floor needing protection. For Hearth Protection Pads installed in front of this Fireplace, the total
R-values of all layered materials above the combustible floor must have an R-Rating of 1.0 or greater.
Facing Backer Material: The base layer attached to framing studs and extending over the sheet metal face of this fire-
place. Backer Materials placed directly on top of this fireplace's metal face surrounding the glass frame and the convec-
tion air gaps must be of non-combustible quality. It is recommended that you use the highest R-value rated material
available and suitable for your particular type of Finishing Material and the attachment method you select to attach the
Finishing Material to the Facing Backer Material.
R-value is the measurement of the insulating properties of a given material at a given thickness. Below are two tables
showing the R-values of common hearth and facing materials:
Backer Materials R-Ratings Table
R-Values of common Backer Materials
Material Thickness R-Value
Note
Mineral Fiber Board ( Backer 160) 1/2" 1.270
Mineral Fiber Board (Backer 300) 1/2" 1.030
Ceramic Board (Rescor 360) 1/2" 1.110
Ceramic Board (Fiberfrax Duraboard LD) 1/2" 1.100
Common Brick 2-1/4" 0.450
Common Brick 4" 0.800
Gypsum or Plaster Board 1/2" 0.450
Cement Board (Durock Next Gen) 1/2" 0.390
Cement Board (Wonderboard) 1/2" 0.260
Cement Board (Hardibacker 500) 1/2" 0.200
Cement Board (Hardibacker) 1/4" 0.130
Finishing Materials R-Ratings Table
R-Values of common Facing Materials
Material Thickness R-Value
Cement Mortar 1/2" 0.100
Concrete 1" 0.095
Ceramic Tile 1/4" 0.020
Flagstone 1" 0.079
Granite 1" 0.083
Limestone 1" 0.153
Marble 1" 0.090
Sandstone 1" 0.079
Slate 1" 0.100

85-03-00988 20 | Page
R36 5/8
28 11/16
24 7/8
32 5/8
40 3/8
HATCHED AREAS MUST BE COVERED WITH
NON-COMBUSTIBLE MATERIALS ONLY.
FINISHING MATERIALS INSTALLATION
All finishing materials that surround this fireplace’s arch profile must extend out from the face surface of this fireplace 1
inch minimum for most decorative Fronts to fit properly. A maximum finishing material thickness of 2.5” is allowed.
FINISHING GUIDES
This appliance arrives with the inner finishing
guides factory installed. When installing a Grace
Front, Willowbrook Front or Bentley Doors on
the fireplace there are two options for finishing
the fireplace depending on the finishing material
and desired look. The fireplace can be finished
to the inner guides that come on the fireplace or
the guides that come with the front kits can be
installed on the fireplace and used as outer fin-
ishing guides. For more information reference
the instructions that come with the front kits. If
the finishing material is greater than 2.5” thick
the guides that come with the fronts must be
used.
Tiles and Faux Rock
If installing Tiles or Faux Rock, first install a ½” thick (minimum) (Backer board) over the face of the fireplace and framing
members. Follow by applying Thin Set 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.
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 14-1/8” 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 using High Temperature RTV Silicone 1/8” round beads in serpentine lines over the
metal face of the unit to adhere the marble or Granite slabs. Never use large pools of RTV silicone. Only 1/8” round beads
in spline shapes are permitted. Allow at least 24 hours or longer per manufacturer’s recommendations for the RTV Sili-
cone to cure before operating this appliance. Failure to allow adequate cure time can result in the RTV silicone oozing out
of joints or the RTV can off-gas pungent odors.
In the area defined as “NONCOMBUSTIBLE ZONE” [FIGURE 7], only NONCOMBUSTIBLE MATERIALS ARE
ALLOWED. Mendota Recommends the use of an R1.0 or higher rated Backer ½” board as base material in the non-
combustible zones. DO NOT use Durock or Wonderboard. These materials breakdown when heat is applied and are not
recommended.
When this fireplace is installed in a framed cavity that is 14-5/8” deep, the facing material 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. Consult section “FRAMING DEPTH and FINISHING
GUIDES”.
WARNING: The cross hatched areas labeled as
“NONCOMBUSTIBLE ZONE” must be covered with noncom-
bustible finishing materials that is 1-inch thick, minimum. DO
NOT ALLOW COMBUSTIBLE FACING MATERIALS TO
ENCROACH IN THIS AREA!
A
UNIT FACE