Mendota CHELSEA M-27 Instruction Manual

CHELSEA

r

A

OPEN HEARTH TRUE ARCHED GAS DIRECT VENT FIREPLACE

Model M-27

INSTALLATION & OPERATING INSTRUCTIONS MANUAL

DOCUMENT NO. M27-0906

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.

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.

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

Do NOT 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.

WARNING

WARNING

WARNING: Improper installation, adjustment, altera-

tion, service or maintenance can cause injury or prop­erty damage. Refer to this manual. For assistance o
additional information consult a qualified installer, ser­vice agency or the gas supplier.

FOR YOUR SAFETY

qualified installer, service agency, or the gas sup-

plier 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 ap­pliance.

WARNING

Do not operate this appliance with the glass removed,

cracked or broken. A licensed or qualified person
should do replacement of glass.

WARNING

Mendota gas fireplaces are heat producing appliances.

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

The installation must conform with local codes or, in
the absence of local codes, with the current National
Fuel Gas Code, ANSI Z223.1, or the current Natural
Gas and Propane Installation Code, CSA B149.1

CAUTION

THESE INSTRUCTIONS ARE TO REMAIN WITH
THE HOMEOWNER.

Table of Contents

SAFETY AND WARNING INFORMATION.................................................................................................................................................3

SPECIFIC REQUIREMENTS FOR THE COMMON WEALTH OF MASSACHUSETTS ...........................................................................4

CONGRATULATIONS................................................................................................................................................................................6

BUILDING PERMIT AND INSTALLATION INSPECTION APPROVAL REQUIREMENTS .......................................................................6

GENERAL APPLIANCE SPECIFICATIONS ..............................................................................................................................................7

MANTEL CLEARANCES............................................................................................................................................................................7

CLEARANCES TO COMBUSTIBLES FROM APPLIANCE SURFACES...................................................................................................9

PLANNING THE INSTALLATION.............................................................................................................................................................10

FRAMING DIMENSIONS .........................................................................................................................................................................11

FRAMING DEPTH & FINISHING MATERIAL ..........................................................................................................................................12

ELEVATED FRAMING DIMENSIONS......................................................................................................................................................13

GENERAL INFORMATION ......................................................................................................................................................................14

GAS SUPPLY REQUIREMENTS.............................................................................................................................................................15

GAS PRESSURE REQUIREMENTS .......................................................................................................................................................16

GENERAL INSTALLATION INSTRUCTIONS..........................................................................................................................................17

GENERAL FLUE VENTING INSTRUCTIONS .........................................................................................................................................18

EXTERIOR VENT LOCATIONS AND RESTRICTIONS...........................................................................................................................19

FLUE VENTING COMPONENTS IDENTIFICATION...............................................................................................................................20

MASTER FLUE VENTING REQUIREMENTS CHART............................................................................................................................21

IMPORTANT VENTING CONFIGURATION NOTES...............................................................................................................................22

APPROVED VENT SYSTEMS.................................................................................................................................................................23

VERTICAL RISE HORIZONTAL TERMINATION.....................................................................................................................................25

VERTICAL THROUGH-THE-ROOF VENTING........................................................................................................................................27

M-27 DOOR OPERATION........................................................................................................................................................................30

REFRACTORY LINER REMOVAL AND INSTALLATION PROCEDURES.............................................................................................33

M-27 LOG SET INSTALLATION INSTRUCTIONS ..................................................................................................................................37

M-27 SURROUND KIT .............................................................................................................................................................................46

INSTALLATION CHECK OFF LIST..........................................................................................................................................................54

LIGHTING CHECK OFF LIST ..................................................................................................................................................................54

LIGHTING INSTRUCTIONS.....................................................................................................................................................................55

THERMOSTAT OPERATION AND WALL SWITCH KIT CONNECTIONS..............................................................................................57

MAKING WIRE CONNECTIONS TO WALL SWITCH KIT #AA-11-00781...............................................................................................58

BLOWER SYSTEM INFORMATION........................................................................................................................................................59

TROUBLE SHOOTING THE

CUSTOMER INFORMATION...................................................................................................................................................................61

MAINTENANCE........................................................................................................................................................................................62

BURNER FLAMES GENERAL HEIGHT DIAGRAM.................................................................................................................................63

NATURAL TO LP GAS CONVERSION....................................................................................................................................................64

LP GAS PRESSURE REQUIREMENTS..................................................................................................................................................65

VALVE ASSEMBLY REPLACEMENT PARTS.........................................................................................................................................68

GLASS FRAME ASSEMBLY REPAIR AND REPLACEMENT.................................................................................................................69

MENDOTA WARRANTY QUALIFICATION & SERVICE REFERENCE FORM .....................................................................................70

MENDOTA EXTENDED LIFETIME PROTECTION AND LIMITED WARRANTY....................................................................................75

M-27 FIREPLACE......................................................................................................................................60

- 2 -

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.
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 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 compart­ment, 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.

Clothing or flammable material SHOULD NOT BE PLACED on or near the appliance.
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
appliance.

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

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

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

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

combustion and ventilation air not to be obstructed
DO NOT abuse the glass door by striking the glass, slamming the door shut, etc.

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

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

ance check-up at the beginning of each heating season.
DO NOT place furniture or any other combustible household objects within 36 inches of the fireplace front.

- 3 -

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 cur­rent edition of NFPA 720, NFPA 70 and the Massachusetts State Building code in the residential unit
served by the side wall horizontally vented gas fueled equipment, a battery operated carbon monoxide
detector with an alarm shall be installed in compliance with the most current edition of NFPA 720. NFPA
70 and the Massachusetts State Building Code.

2. In addition to the above requirements, if there is not one already present, a carbon monoxide detector
with an alarm and a battery back up shall be installed and located in accordance with the installation re­quirements supplied with the detector on the floor level where the gas equipment is installed. The carbon
monoxide detector with an alarm shall comply with 527 CMR, ANSI/UL 2034 Standards or CSA 6.19 and
the most current edition of NFPA 720. In the event that the requirements of this subdivision can not 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
minimum height of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizon­tally vented gas fueled heating appliance or equipment. The sign shall read, in print size no less that one­half (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 sepa­rate from the dwelling, building or structure used in whole or in part for residential purposes.

(c) When the manufacturer of Product Approved side wall horizontally vented gas equipment provides a venting

system design or venting system components with the equipment, the instructions for installation of the
equipment and the venting system shall include:

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

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

(d) When the manufacturer of a Product Approved side wall horizontally vented gas fueled equipment does not

provide the parts for venting the flue gases, but identifies “special venting systems”, the following shall be sat­isfied:

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

- 4 -

SPECIFICATIONS

MODEL M-27

High Fire - Adjustable to - Low Fire

BTUH. (MODEL M-27) NAT. GAS 27,000 6,750
BTUH. (MODEL M-27) LP GAS 25,000 7,000

NOTE: LPG CONVERSION KIT, #HA-48-00025, MUST BE PURCHASED
SEPARATELY TO CONVERT TO BURN LPG IN THIS FIREPLACE.

MAIN ORIFICE [0-2000ft (610 m)]: REAR BURNER: #45 NAT. GAS [#56 L.P. GAS] – FRONT BURNER: #51 NAT. [#59 LP]

OVERALL EFFICIENCY: .....................EXCEEDS D.O.E. EFFICIENCY REQUIREMENTS (A.F.U.E.) FOR DIRECT VENT

CO-AXIAL DIRECT VENT FLUE: ..........4" INNER, 6 5/8" OUTER

TOTAL WEIGHT:....................................175 POUNDS

SAFETY:.................................................AGA CERTIFIED PILOT GENERATOR, MILLIVOLT SYSTEM

ACTIVATED WITH SWITCH, THERMOSTAT OR REMOTE CONTROL.

APPLIANCE CERTIFICATION AND TESTING AGENCY

INTERTEK TESTING SERVICES, ICBO#AA647-4
Certified under ANSI Z21.88 (2002) • CSA 2-33 (2002) “Vented Gas Fireplace Heaters" not for use with solid fuel. Approved for bed­room installations and mobile homes. UL307B approved for "mobile homes, after first sale of home, not for recreational vehicles."

GAS REQUIREMENTS..........................SUPPLY PRESSURE

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 1.4 amps (for blower operation only)

APPROVED VENT SYSTEMS...............DURAVENT

WALL HEATERS.

: GAS INLET: 1/2" N.P.T.

MINIMUM CLEARANCES TO COMBUSTIBLE CONSTRUCTION

UNIT TO FLOOR 0in. (0mm) GLASS EDGE TO ADJACENT SIDEWALL 12in. (305mm)
UNIT TO ENCLOSURE SIDEWALL 0in. (0mm) VENT PIPE TOP TO COMBUSTIBLES 2in. (51mm)
UNIT TO ENCLOSURE BACK WALL 1in. (25mm) VENT PIPE SIDES TO COMBUSTIBLES 1in. (25mm)
UNIT TOP TO ENCLOSURE CEILING 1-5/8in. (41mm) VENT PIPE BOTTOM TO COMBUSTIBLES 1in. (25mm)
UNIT TOP TO ROOM CEILING 23-1/2in. (597mm)
8” MANTLE ABOVE DISCHARGE AIR OPENING 13in. (330 mm)

THIS FIREPLACE INCLUDES A SEALED COMBUSTION SYSTEM, 7-PIECE CERAMIC FIBER LOG SET & COALS, FIREBRICK
LINED FIREBOX, NEO-CERAM GLASS, PIEZO IGNITER, DUAL BLOWERS, AGA CERTIFIED SAFETY SYSTEM, and WALL
THERMOSTAT.

OPTIONS

: BLACK, NATURAL IRON, SWEDISH NICKEL, 24K GOLD FILIGREE, OR CAST IRON DECORATIVE FRONTS.

CAUTION

THESE INSTRUCTIONS ARE TO
REMAIN WITH THE HOMEOWNER.

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

Propane Installation Code, CSA B149 Installation Codes in Can­ada.

This appliance may be installed in an
aftermarket, permanently located,
manufactured home (USA only) or
mobile home, where not prohibited
by local codes.

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

This appliance is only for use with
the type(s) of gas indicated on the
rating plate.

- 5 -

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 opera­tion 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 com­partments, burners and circulating air passageways of the appliance be kept clean. The burner and pilot flames and logs
should be visually checked periodically.

DO NOT use this appliance if any part has been under water or exposed to moisture corrosion. Immediately call a quali­fied service technician to inspect the Fireplace and replace any part of the control system and any gas control, which has
been under water. DO NOT use this fireplace if the burner does not
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 employ­ees or representatives for any damages caused by an inoperable, inadequate, or unsafe condition which is the result, ei­ther directly or indirectly, of any improper operation, installation or servicing procedures.

light immediately. Turn unit off and call Mendota ap-

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.

- 6 -

M-27 GAS DIRECT VENT FIREPLACE

GENERAL APPLIANCE SPECIFICATIONS

1" MINIMUM

3.7255

2.5478

45°

ADJACENT WALLS:

A wall perpendicular to and in front of this fireplace's
glass door surface must be at least 12 inches from the
side edges of the visible glass.

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.

8" DEEP COMBUSTIBLE MANTEL

5

20

"

8

3

14

4

12" MINIMUM FROM WALL TO

VISIBLE GLASS EDGE.

3

OR 8-

8

" FROM SIDE OF FIREPLACE.

Figure 1: General Appliance Specifications

1

29

2

FRAMING WIDTH

1"

"

" MIN.

5-1/2" TO VENT

PIPE CENTER

14" MIN.

DEPTH

TO ROOM CEILING

MINIMUM ROUGH FRAMING DIMENSIONS

HEIGHT 49"

WIDTH

29-

1

"

2

DEPTH 14"

FROM UNIT BASE
FROM UNIT BASE

TO 8" MANTEL

CEILING

60"
47"

8" MANTEL DEPTH

AT HEIGHTS SHOWN

3

34

"

4

5

24

"

8

11-1/4"

11-1/4"

1

49

"

8

18" MIN

TO SOFFIT

1" MIN. CLEAR A NCE

TO VENT COMPONENTS

13"

3

29

"

4

8"

"

3

8

7

"

4

3

6

"

1

8

6

"

9

16

5

"

15

16

4

"

5

16

4

"

11

16

3

"

1

16

3

"

7

16

2

"

7

8

1

DISTANCE FROM
FIREPLACE FACE

APPROVED MANTEL PROFILE

1

60" MIN.

TO ROOM CEILING

47" MIN.

UNIT BASE

47"

3

38

"

4

37"

1

13"
12"
11"
10"
9"
8"
7"
6"
5"
4"
3"
2"
1"

CONVECTION AIR OPENING

HEIGHT ABOVE

"

4

1

"

5

8

0"

TO 8" MANTEL

49" MIN.

ROUGH FRAMING

1

36

"

4

HEIGHT

1

" HEARTH P AD HEIG HT

4

(MIN R-1 RATING)

IS RECOMMENDED

5/8" min. from unit front edge to back

edge of hearth pad. Spacer is installed on fireplace.

12" min. Non-combustible Hearth protection required

[SEE HEARTH PRO TECTION PAD R-RATING, PAGE 12 ]

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 rai sed off the floor more than 6",
No hearth protection pad is required.

9

44

"

16

TO CENTERLINE

OF VENT CAP

- 7 -

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

8" DEEP COMBUSTIBLE MANTEL

Fireplace Face the combustible mantel may

protrude 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 34 inches

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 property damage, personal injury or loss of life.

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

reference dimensional information

necessary in determining the distance

a combustible mantel may protrude out

from the face surface of this fireplace.

The Chart, at left, shows the Distance From

up from the floor level of this

Figure 2: Mantel Clearances

- 8 -

CLEARANCES TO COMBUSTIBLES FROM APPLIANCE SURFACES

Figure 3: Clearances to Combustibles

CLEARANCE

FROM TOP OF ARCHED OUTER SKIN

TO COMBUSTIBLE FRAMING

1-5/8" MINIMUM

- 9 -

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.

• 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. See Figure 1:
General Appliance Specifications and Figure 3: Clearances to Combustibles.

14"

Figure 4: Planning Installation

1

29

"

2

3

34

"

4

24

5

"

8

11-1/4"

29

11-1/4"

14"

1

49

"

8

IN ADDITION TO THESE DIMENSIONS, ALSO REFERENCE

1

"

2

MANTEL CLEARANCES SECTION
FRAMING DIMENSIONS SECTION

VENTING CONFIGURATION SECTION

WARNING

FIRE RISK- ODOR RISK

• Install appliance on hard metal or wood surfaces extending full width and depth of this
fireplace.

• 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.

- 10 -

FRAMING DIMENSIONS

Minimum Rough Framing Dimensions

DESCRIPTION

A Width 29-1/2
B Height 49

DEPTH (assumes that 3/4” thick plywood
is used as facing material. Reduce depth

C

(C) for thicker facing materials. See Fac-

ing Materials Section.)
D Vent opening height 10-1/4
E Vent opening width 9-1/4

Rough Framing Height

The Rough Framing Height must be maintained to allow this fireplace
and the 90-degree elbow connected directly to the top, on certain vent
systems, to slide into the framing cavity. Once the fireplace is positioned
inside the framed cavity, a secondary nailer stud should be added at a
minimum height of 38 inches above the floor level of this fireplace. The
nailer stud will allow for securing facing materials.

Special consideration for vertical vent systems

If a straight-up vertical vent system is being considered, the top plate on
the front wall of the chase will need to be notched to allow the proper 1”
clearance from the top plate to the vertical vent pipe. Furthermore, all
framing headers and members that are located within the 1” clearance
requirement to the vent stack or vent components must be positioned on edge (on the
1-1/2” edge) to allow proper clearance to the vent stack
or component. See Figure 6.

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.

DIMENSION

(INCHES)

13-1/4

1"

Figure 5: Framing

NOTCH

9"

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

TOP
PLATE

Figure 6: CLEARANCE

TO VERTICAL VENT

- 11 -

Framing Depth & Finishing Material

Figure 7: Framing Depth

2.00

Framing

Sub Layer

Finish Material

14.00

12.00 min

Finish

Material

Thickness

½” 13 ½”
¾” 13 ¼”

1” 13”

Max.

Framing

Depth

1" min

1 ¼” 12 ¾”
1 ½” 12 ½”
1 ¾” 12 ¼”

2” 12”

Figure 8: Finishing Material Cutting Dimensions

REF

7

R14

16

36

1

22

8

REF

9

16

28

7
8

- 12 -

ELEVATED FRAMING DIMENSIONS

This fireplace may be installed in an elevated position by created an elevated deck and an appropriate framed en­closure.

NOTE: This fireplace may be elevated but MUST allow a minimum of 60” distance between this fireplace’s floor

level and the ceiling.

CEILING

60" MINIMUM

49"

29

1

"

2

Figure 9: Elevated

Framing Dimensions

3

"

1

3

36"

31

"

2

3

"

4

4

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 R­1 rating.

All hearth pads must be non-combustible (metal, brick,
stone, or mineral fiberboard). Do not use any combusti-

ble material to protect the floor in front of this fireplace.
For the M-27, the hearth protection pad must be rated at
R-1 minimum.

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 a required thickness (t) in inches:
R = 1/K x T ( 1 divided by K , then multiplied by thickness).
c. If C-value is given: R = 1/C (1 divided by C value given).

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:

If the specified hearth pad should be ¾” thick material with a
K-factor of 0.84. The proposed alternate is 1/4” tile with a C­factor of 1.25 over 1/8” mineral board with a K-factor of 0.29

1

1

" HEARTH PAD HEIGHT

4

(MIN R-1 RATING)

IS RECOMMENDED

5/8" min. from unit front edge to

back edge of hearth pad. Spacer

is installed on fireplace.

12" min. Non-combustible Hearth

protection required [SEE HEARTH

PROTECTION PAD R-RATING, PAGE 12]

Step A. Use formula to convert specifications to R-value.

R = 1/K x T = (1/0.84) x 0.75” = 0.893

Step B. Calculate R of proposed system. 1/4” tile with C = 1.25.

R of the tile = 1/C = 1/1.25 = 0.80; 1/8” mineral
board of K = 0.29, therefore R mineral board = 1/0.29
x 0.125 = 0.431; Total R = R tile + R mineral board
= 0.8 + 0.431 = 1.231.

Step C. Compare proposed system R = 1.231 to specified R

of 0.893. Since R is greater than required, the system
is acceptable.

- 13 -

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.

SAFETY AND STRUCTURAL CONCERNS:

The M-27 Fireplace must
logs or coal bed must
Pilot system thermopile must
attempting to relight pilot, always open glass door before lighting pilot light.

VENTING REQUIREMENTS

This Mendota Fireplace can be vented using DURAVENT brand coaxial pipe (4”X6-5/8”) off the top. Use only Mendota specified
vents and vent caps when installing your fireplace. Closely follow venting locations, directions and requirements. Observe the
restrictions relating to vent position on exterior of home (see Figure 14). Be sure all vent pipe sections are fully twist-locked and
leak-proof. Be sure 1000º Silicate Stove Sealant is used on the inner pipe joints of all Simpson DuraVent pipe components and
all adjustable pipe sections.

be installed and serviced by a Mendota approved serviceperson. Any adjustments to burner, pilot,

be made by a Mendota approved service person. Pilot system voltage must be checked with a voltmeter.

register a minimum of 325 mV on a voltmeter. If pilot goes out, always wait five (5) minutes before

:

WARNING: ALWAYS REMOVE THE GLASS DOOR WHEN LIGHTING THE PILOT.

The burners must light immediately & the flame must travel promptly and smoothly around "curves" and light entire burner. The
flame must not "lift" off burner. DO NOT operate unit if burner does not light immediately or if flame lifts off burner.

The Mendota Direct Vent Fireplace may be placed within 12 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 13" above top of the heat outlet (47” 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 or mantels with
steel protector plate on underside can be installed at any desired height above decorative front.

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 12" 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.

HEATING PERFORMANCE:

Mendota Gas Built-in Fireplaces are true, high efficiency gas heaters. With its high heat output the Mendota Fireplace will heat
a large area of your home if situated to maximize heat/ air circulation. Air movement options for maximizing heat circulation that
can be considered are through-the-wall grills or floor grills, 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 6,750 BTUH by turning off the Rear Burner and turning the Hi/Lo pressure regulator knob on
the gas valve, counter clockwise, from "Hi" to "Lo". Blower can be turned down or turned off to reduce heat output.

AESTHETIC CONSIDERATIONS:

Burning or static fireplaces are a major aesthetic focus in any room. Locate your gas fireplace as you would a television set.
The Mendota Hearth Gas Fireplace will be a continuing source of comfort and fascination. Corner installations will afford you
the greatest potential for viewing in many rooms. 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 64 in. minimum dis­tance is provided between the floor level of this fireplace and the room’s ceiling surface.

ELECTRICAL REQUIREMENTS:

Dual Blowers are included in this Mendota Direct Vent Fireplace. A 115-volt electrical service must be supplied at the fireplace
location at the time of installation. 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.

NOTE: The blower output can be adjusted with the rheostat. There will be delays in blower operation during "heat-up" (approx. ½ hr.)

and extended blower operation during "cool-down" (approx. ½ hr.).

Thermostat wire should be run from desired thermostat (or "on/off" switch) location to the main gas valve (located on the left
side) – see thermostat installation section.

- 14 -

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 im-

perative to the

FRONT

GAS SUPPLY LINE SIZING

The Mendota Gas Fireplace comes equipped with a 1/2" N.P.T.
Female inlet on a Street Elbow. Gas supply piping must enter the
Fireplace cabinet on the left side.

An approved manual shut-off ball valve is supplied in the fireplace.
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).

13

3

"

4

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

57"

gas pipe diameters. Strictly adhere to the correct pipe sizes.

Figure 10:

WARNING: Never use any type of pipe thread sealants or compounds

Gas Supply

on the seats of flare or compression connections.

PIPE LENGTH

(FEET)

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)

SCHEDULE 40 PIPE

INSIDE DIA.

TUBING, TYPE L

OUTSIDE DIA.

NOTE: Some areas allow coated stainless steel (CSST), copper tubing or galvanized pipe - check with local ap-

proval agencies and codes. NEVER

GAS PRESSURE CHECKING REQUIREMENTS

Inlet and manifold gas pressure checking taps are located on gas valve. A qualified installer shall take pressure meas­urements at these ports to verify and set the correct gas pressures during initial installation.

NOTE: Check for gas leaks with soap and water solution.

use plastic pipe.

- 15 -

GAS PRESSURE REQUIREMENTS

ONE MAJOR CAUSE OF OPERATING PROBLEMS WITH GAS APPLIANCES CAN BE IMPROPER GAS PRESSURE!

Problems such as changes in flame color or configuration, gas pilot or burner outages, intermittent operation, changes in
heat output, excessive burner noise, etc. are nearly always the result of changes in gas pressure or improper gas pres­sure at the time of the installation. The most important item to check during the installation and the first thing to check
when problems occur is gas pressure!

Gas supplies normally enter a residence at 1/2 PSI (13" - 15" W.C.) (3 KPA). A pressure regulator is then placed outside
the residence, near the gas meter, which drops this pressure to 7" W.C. (1.8 KPA) (Nat. Gas). This "inches to inches"
regulator is of adequate capacity to service the gas appliances (such as dryer, furnace, etc.). If this regulator's capacity is
not sufficient to add the Gas Fireplace, an additional "inches to inches" regulator must be installed for the Fireplace.
EXCEPTION: Some codes allow 2-PSI (1.4KPA) supplies to enter the residence, in which case "pounds to inches" regula­tors are used.

The following table provides information on correct gas pressure requirements. Be sure your gas supplier or plumber
carefully follows this table.

GAS PRESSURE REQUIREMENTS

DESIRED

INLET

PRESSURE

MINIMUM

INLET

PRESSURE

MAXIMUM

INLET

PRESSURE

MANIFOLD

OUTLET

PRESSURE

AIR SHUTTER

POSITION*

NATURAL GAS 7.0" W.C.

(1.75 kPa)

L.P. GAS 11.0" W.C.

(2.75 kPa)

5.0" W.C.

(1.12 kPa)

11" W.C.

(2.75 kPa)

11" W.C.

(2.61 kPa)

13.0" W.C.
(3.24 kPa)

3.5" W.C.

(0.87 kPa)

10.0" W.C.
(2.5 kPa)

0 - 1/8 " OPEN

(3 mm)

1/4" OPEN MIN.

(5 mm)

TURN GAS VALVE HI-LO KNOB TO "HIGH" POSITION. GAS PRESSURES MAY VARY PLUS OR MINUS 5%.

*NOTE: For high altitude (above 2.000 feet) some variations in air shutter settings may be required.

Manifold pressure must be taken at the “MANIFOLD PRESSURE" tap and inlet pressure at the "INLET PRESSURE" tap
with the burner operating by a qualified installer.

INLET

PRESSURE TAP

MANIFOLD PRESSURE

TAP

Figure 11: Pressure Test

Port

- 16 -

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 M-27 Fireplace is approved for
mobile home and bedroom installations.

CAUTION: The Mendota M-27 Fireplace may be installed in a manufactured (mobile) home after the first sale of the home. Manu­factured home (mobile home) installation must conform with the Manufactured Home Construction and Safety Standard, Title 24
CFR, Part 3280, or, when such a standard is not applicable, the Standard for Manufactured Home Installations, ANSI A225.1/NFPA
501A, or CSA Z240.4-Gas Equipped Mobile Housing. Consult your local building official. Note: For mobile home installations unit
must be bolted to the floor and properly grounded.

The M-27 Fireplace must be installed by a qualified service person.

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
MAINTAIN CORRECT CLEARANCE TO FIREPLACE AND VENT PIPES.

MUST

WARNING: One-inch clearance to sides & below and 2 inches clearance on top of horizontal sections and elbows.

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 right side of the fireplace cabinet. Connect

wires using wire nuts. Make sure the grounding wires are properly connected and that the installation conforms to
all local and national wiring codes.

6. Have gas supplier or qualified plumber install gas supply line to fireplace and connect to the ½” female connector.

Be sure gas and plumbing instructions (see Page 15 and 16) 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 rheostat (included).
NOTE: There will be a time delay in blower operation during
"heat-up" (approx. ½ hour) and extended blower operation dur­ing "cool-down" of unit (approx. ½ hour).

OPERATION DURING POWER OUTAGES

The fireplace is designed to operate during power outages. The
blower will not operate during the power outage.

Figure 12: Junction Box

- 17 -

GENERAL FLUE VENTING INSTRUCTIONS

The Mendota Fireplace must be vented using the Mendota approved vent system components. Approved brands of vent
components include DuraVent, Amerivent, Selkirk and Security vent pipes and venting components. All warranties will be
voided and serious fire, health or other safety hazards may result from any of the following actions: Installation by unau­thorized personnel; installation of any damaged component; unauthorized modification of vent system; installation of any
components not approved by Mendota; failure to meet all clearance requirements; failure to properly twist-lock and posi­tively seal all components. Consult local building codes before beginning the installation.

WARNING

Always maintain required clearances (air spaces) to combustibles to prevent a fire hazard. Do not fill air spaces with insu­lation. Check installation instructions for minimum clearance requirements between the outer walls of the vent pipe and
nearby combustible surfaces. Be sure to check the vent termination clearance requirements from decks, windows, soffit,
gas regulators, air supply inlets, and public walkways, as specified in these installation instructions and local building
codes.

SAFETY PRECAUTIONS FOR THE INSTALLER: 1) Wear gloves and safety glasses for protection; 2) Exercise extreme
caution when using ladders or on rooftops; and 3) Be aware of electrical wiring locations in walls and ceilings.

This gas appliance and vent system must be vented directly to the outside of the building, and never attached to a chim­ney serving another solid fuel or gas burning appliance. Each direct vent gas appliance must have its own separate vent
system. Common vent systems are prohibited.

To assure proper venting performance of this high-performance Mendota Direct Vent Fireplace, it is critical that all brands
of vent pipe sections are sealed tightly and leak-proof. This means that all pipe sections must be carefully rotated into the
fully "twist-locked" position.

We strongly recommend that fixed length pipe sections be used in place of telescoping sections whenever pos­sible.

Note: When using vent pipe and components that do not incorporate a fiberglass or graphite gasket at the inner exhaust

tube joints, you must use Milpak 1000F silicate stove sealant (#65-06-00909). Aluminum foil tape may be used on the
outer (air intake) pipe joint but is not mandatory. Local Codes may vary. Contact your dealer for proper materials.

Do not separate telescoping sections. They must be used as complete assemblies.

COMPONENT "TWIST-LOCK" CONNECTION PROCEDURE

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

Figure 13: Twist-Lock Piping

- 18 -

EXTERIOR VENT LOCATIONS AND RESTRICTIONS

ALL MEASUREMENTS FROM

Figure 14: Exterior Vent

CENTER LINE OF VENT CAP

∨ - Vent Terminal ∧ - Air Supply Inlet ≡ - Area where terminal is not permitted

A = Clearance above grade, veranda, porch, deck, or bal-

cony (*12 inches (30 cm) minimum). Vinyl surfaces
require 24” min.

B = Clearance to window or door that may be opened

(*12 inches (30 cm) minimum.

C = *Clearance to permanently closed window (minimum

12 inches (30 cm) recommended to prevent condensa­tion on window)

D = *Vertical clearance to ventilated or soffit located above

the terminal from the center-line of the terminal (18
inches (46 cm) minimum) Vinyl surfaces require 24”
min (60 cm).

E = *Clearance to unventilated soffit (18 inches (46 cm)

minimum) Vinyl surfaces require 24” min (60 cm)

F = Clearance to outside corner - 7 inches (18 cm). M = Clearance under veranda, porch, deck, or balcony (*12

G = Clearance to inside corner - 12 inches (30 cm). Vinyl

surfaces require 24” min (60 cm).

† A vent shall not terminate directly above a sidewalk or paved driveway, which is located between two single-family dwell­ings and serves both dwellings.

H = *Not to be installed above a meter/regulator assembly

within 3 feet (90 cm) horizontally from the center-line of
the regulator

I = *Clearance to service regulator vent outlet *3 feet (92 cm)

minimum.

J = *Clearance to non-mechanical air supply inlet to building

or the combustion air inlet to any other appliance.
12 inches (30 cm) minimum.

K = *Clearance to a mechanical air supply inlet 6 feet (1.8 m)

minimum

L = † Clearance above paved side-walk or a paved driveway

located on public property (*7 feet (2.1 m) minimum)

inches (30 cm) minimum ‡)

N= Minimum 24” horizontal clearance to any surface, such as

an exterior surface, for vertical terminations.

‡ Only permitted if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
* As specified in CGA B1:19 Installation Codes (1991). Note: Local codes or regulations may require different clearances.

- 19 -

FLUE VENTING COMPONENTS IDENTIFICATION

ITEM DESCRIPTION

1 6" or 7” PIPE (DuraVent 6”/Amerivent 7”)
2 12" VENT STACK
3 24" VENT STACK
4 36" VENT STACK
5 48" VENT STACK
6 90ºGALVANIZED ELBOW

45º GALVANIZED ELBOW

7 ADJUSTABLE WALL THIMBLE

8 ATTIC INSULATION SHIELD 12"

9 ROOF FLASHING (0/12 TO 6/12)
10 ROOF FLASHING (7/12 TO 12/12)
11 STORM COLLAR
12 VERTICAL VENT CAP
13 SUPPORT BAND
14 HORIZONTAL VENT CAP
15 FIRE STOP SPACER

12

11

10

9

15

13

1,2,3,4,5

6

14

1

7

Figure 15: Flue Venting Components

DO NOT SEPARATE TELESCOPING SECTIONS.

USE TELESCOPING SECTIONS AS COMPLETE ASSEMBLIES.

- 20 -

NOTE: THIS CHART IS APPLICABLE TO BOTH NATURAL GAS AND LPG INSTALLATIONS.

IMPORTANT NOTES:

MASTER FLUE VENTING REQUIREMENTS CHART

45'

40'

Figure 16

35'

30'

25'

25'

20'

VERTICAL RUN

15'

[TOTAL OF LENGTHS OF PIPE SECTIONS]

10'

V min H max

0 in. 48"

6 in. 9'6"
12 in. 16'
18 in. 16'6"
24 in. 17'
30 in. 17'6"
36 in. 18'6"

4 ft. - 25

ft. 20'

1. 4 feet maximum horizontal pipe run allowed with a 90-degree elbow connected directly to this fireplace’s flue
starter collar.

2. 20 feet maximum horizontal run allowed only if the first vertical section connected directly to the top of this fire­place is more than 4 feet long.

3. Two 45-degree elbows may be connected directly to the top of this fireplace to create a horizontal offset. 20 feet
maximum horizontal run allowed with this offset configuration only if the first vertical section connected directly to
the last 45-degree elbow is more than 4 feet long.

3'
6"

4'

2'

0"

1'

4'

5'

HORIZONTAL RUN

[TOTAL OF LENGTHS OF PIPE SECTIONS]

9'-6"

16'

17'

20'

18'-6"

- 21 -

IMPORTANT VENTING CONFIGURATION NOTES

See Figure 16 [MASTER FLUE VENTING REQUIREMENTS CHART].

MAXIMUM HORIZONTAL RUN

A. Maximum Horizontal Run allowed is 20 feet if a vertical starter section that is between 4 feet to 25 feet is con-

nected directly to this fireplace’s flue starter collar and only one 90 degree elbow is used.

B. Maximum Horizontal Run allowed is 4 feet if a 90-degree elbow is connected directly to this fireplace’s flue starter

collar.

MAXIMUM VENT SYSTEM LENGTH

A. Combined total length of all straight pipe sections in the vent system shall be less than 45 feet if using only one

90-degree elbow or equivalent.

B. Combined total length of all straight pipe sections in the vent system shall be less than 42 feet when using two 90-

degree elbows or equivalent.

C. Combined total length of all straight pipe sections in the vent system shall be less than 34 feet when using three

90-degree elbows or equivalent.

HOW TO CALCULATE THE VENT SYSTEM LENGTHS

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

USING 90 DEGREE ELBOWS

A single 90º vertical-to-horizontal elbow is already calculated into the allowable maximum 20' horizontal run. The Venting
Requirements Chart (Figure 16) assumes that for all horizontal runs calculated, one 90-degree elbow is used within the
venting system. Each additional 90º elbow reduces the maximum horizontal distance by 3'.

If you plan to use more than one 90-degree elbow within the vent system, first use the Venting Requirements Chart (Fig­ure #14) and calculate the maximum horizontal run you are allowed based on the first vertical section connected directly
to the fireplace. From this maximum horizontal run calculated, subtract 3 feet for each additional 90- degree elbow you
will use.

CAUTION:

Example 1: By using three total 90º elbows the maximum horizontal distance has been reduced to 14 ft. (3 - 1 = 2 el-

Example 2: If the first vertical section connected directly to the Fireplace is between 4 feet and 25 feet long, you are al-

lowed a maximum 20 feet of horizontal run. If you plan to use two (2) 90-degree elbows in the entire system, subtract
three (3) feet from the 20 feet maximum horizontal run calculated. Your maximum allowed horizontal run would then be
17 feet. Similarly, if you plan to use three (3) 90-degree elbows, subtract 6 feet; from the 20 feet maximum horizontal run
calculated to yield a 14 feet maximum allowed horizontal run in that venting system.

USING 45-DEGREE ELBOWS

Two 45-degree elbows may be used in place of one 90-degree elbow. On 45-degree runs, one foot of diagonal pipe is
equal to 8-1/2 inches horizontal run and 8-1/2 inches vertical run. Two 45-degree elbows may be connected directly to
the vent starter adapter on this fireplace to create an offset to provide the required clearances to combustible framing or
sheathing materials.

Two 45-degree elbows may be connected directly to the top of this fireplace to create a horizontal offset. 20 feet maxi­mum horizontal run allowed with this offset configuration only if the first vertical section connected directly to the last 45­degree elbow is more than 4 feet long. For maximum allowable horizontal distances with the 45-degree offsets, see the
Master Venting Configuration Chart.

Note: Each 45º elbow reduces the maximum horizontal distance by 1½ '.
SUPPORT:

If a vertical-to-horizontal discharge elbow or a horizontal-to-horizontal discharge elbow is enclosed within a

wall, floor or ceiling, a top air space clearance of 3" must
any combustibles (2" above horizontal runs).

bows x 3' = 6'; 20’ Max. - 6' of elbows = 14' of horizontal run).

Horizontal runs of pipe will require one vent support for every 3 ft. of pipe.

be maintained. Be sure to maintain 1" air space to

- 22 -

APPROVED VENT SYSTEMS

QUICK REFERENCE CHART

Figure 17: Vent Systems

ZERO VERTICAL

HORIZONTAL TERMINATION

H

APPROVED

ZERO VERTICAL

DUAL 90° ELBOWS

VERTICAL TERMINATION

H

V

VERTICAL RISE

HORIZONTAL TERMINATION

H

V

APPROVED

VERTICAL RISE

DUAL 90° ELBOWS

VERTICAL TERMINATION

H

STRAIGHT UP, VERTICAL VENTING

45 FEET

MAXIMUM

APPROVED

VERTICAL RISE

DUAL 90° ELBOWS

HORIZONTAL TERMINATION

V2

V1

H1

V

H2

APPROVED APPROVED APPROVED

VERTICAL RISE

TRIPLE 90° ELBOWS

HORIZONTAL TERMINATION

V2

H1

V1

H2

APPROVED APPROVED

VERTICAL RISE

TRIPLE 90° ELBOWS

VERTICAL TERMINATION

H1

V1

H2

- 23 -

THREE HORIZONTAL DISCHARGE

90° ELBOWS

APPROVED w/ RESTRICTIONS

V2

APPROVED

ZERO RISE HORIZONTAL TERMINATION

The M-27 Fireplace must be installed by a qualified Mendota approved serviceperson.

A Maximum Horizontal Run allowed is 4 feet if a 90-degree elbow is connected directly to this fireplace’s flue starter collar.
When a 90-degree elbow is connected directly to this fireplace, the horizontal centerline of the 90ºelbow will be 44-9/16”
inches up from the floor level of this Fireplace.

See Figure 16, MASTER FLUE VENTING REQUIREMENTS CHART and Figure 18 and Figure 19 below.
Use "fixed" pipe sections in place of adjustable pipe sections

wherever possible. 1000º sealant must be used on ALL inner pipe
joints that do not have factory installed gasket material.

Always maintain 1" clearance from vent pipe sides and bottom to
combustibles, 2" clearance on top of pipe on horizontal runs and
on top of horizontal discharge elbows. Do not fill air spaces with
insulation or other material.

1. Position fireplace in desired location. See Figure 12 for guide­lines on proper vent cap placement on the exterior of home.
Check to determine if wall studs are in the way when venting
system is attached. If this is the case, you may want to adjust
the fireplace location or modify the exterior wall framing to al­low the vent system to penetrate the wall.

2. Measure from the floor level of the fireplace up 44-9/16 inches
[add ¼” rise for every foot of horizontal run] and mark wall di­rectly at the center of where the vent pipe will penetrate the ex­terior wall.

3. Cut and frame a 9-1/4" wide x 10-1/4" high opening in the wall.
The hole must be positioned so the vent system will run level
or have a ¼" rise per foot of run AND be perpendicular to the
wall. The height of the opening must be located to meet all lo­cal and national building codes. Do not allow the termination to be easily blocked or ob­structed. If wall being penetrated is non-combustible material, i.e. masonry block, brick,

etc., a 7-inch diameter hole is acceptable.

4. Attach the 90-degree elbow to the fireplace starter adapter. Attach a horizontal sec­tion to the 90-degree elbow. Be sure all vent component connections are in their fully
twist-locked position and are leak-proof. Be sure 1000ºsealant is used on the inner
pipe joints of all pipe sections manufactured by Simpson DuraVent. The length of the
horizontal piece that fits through the wall will be determined by the location of the fire­place relative to the wall. For a normal installation where this fireplace is installed di­rectly against an exterior wall constructed using 2x4 lumber or 2x6 lumber, only a 6”
horizontal section is required. There MUST be a minimum of 1" air space clearance
to combustibles from all vent components (2" above horizontal runs and horizontal
discharge elbows).

5. A wall thimble must always be used when penetrating combustible wall materi-
als.

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

NOTE: Combustible wall thickness must

be 4" to 8" maximum

Figure 18: Horizontal

Termination

ZERO VERTICAL
HORIZONTAL TERMINATION
H = 4 FEET, MAXIMUM

H

NOTE: Venting terminal should not be recessed into wall or siding.

Figure 19

- 24 -

VERTICAL RISE HORIZONTAL TERMINATION

The minimum vertical section required to be connected directly to the starter adapter on this fireplace is 48 inches when
used with a maximum horizontal run of 20 ft. If the total length of the vertical sections connected directly to the starter
adapter on this fireplace is between 4 feet and 25 feet, you are allowed a maximum 20 feet horizontal run. For other vent­ing configurations within these maximum limits, see Figure 16.

Combined total length of all pipe sections (include restriction of elbows) in the vent system shall be less than 45 feet if us­ing only one or two 90-degree elbows or equivalent;

NOTE: The horizontal run of vent pipe must be level or have a ¼" rise for every 1' of run toward the termination. Never
allow the vent to run downward. This will cause high temperatures and the possibility of a fire.

This M-27 Fireplace must be installed by a qualified Mendota service person

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

2. Locate position where vent pipe will pass through any ceilings and will penetrate the outside wall. Since vent pipe
sections "overlap" we suggest pre-assembling and measuring the total vent pipe run so you can more accurately lo­cate the point where the vent pipe will penetrate the outside wall (See Figure 12). Be sure all vent components are
properly twist locked and leak-proof. Be sure 1000º sealant is used in the inner pipe joints of all pipe sections
manufactured by Simpson DuraVent.

3. Cut and frame a 9-1/2” wide x 10” high opening in the outside wall openings and 9” x 9” opening in ceiling openings.
The outside wall hole must be positioned so the vent system will run level or have a ¼" on rise AND
to the wall. The height of the opening must be located to meet all building codes and not allow the termination to be
easily blocked or obstructed. A ceiling fire stop spacer is required at any floor (ceiling) opening.

4. Connect vent pipe to the fireplace adapter on top of fireplace vent outlet.

be perpendicular

NOTE: DO NOT SEPARATE TELESCOPING SECTIONS.

THEY MUST BE USED AS COMPLETE ASSEMBLIES.

5. The horizontal pipe must end flush with the exterior wall of the home.
Horizontal pipe will require a proper support every 3 ft. of vent pipe.
THERE MUST BE A MINIMUM OF 1" CLEARANCE TO
COMBUSTIBLES FROM ALL VENT PIECES (2" above horizontal runs).

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

wall materials.
NOTE: Combustible wall thickness must

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

Figure 20

be 4" to 8" maximum.

V H

6” 9’6”

12” 16’

2’ 17’
3’ 18’6”

4’- 25’ 20’

For V greater than 25’, see

Figure 16 on Page 20

ONE (1) 90° ELBOW
TOP VENT

HORIZONTAL TERMINATION

H

V

- 25 -

H1

H2

Figure 22

H1+H2 max V max

V

V1 min = 6"
H1 min = 0
H2 min = 6"

V

6" 6' 6"

12'

2' 14' 42'-H1-H2-V1

3' 15' 6"

4'-25'

13'

17' 42'-H1-H2-V1

FOR V GREATER THAN 25',

SEE FIGURE 16 ON PAGE 20

42'-H1-H2-V1
42'-H1-H2-V1

42'-H1-H2-V1

THREE (3) 90° ELBOWS
WITH STARTER VERTICAL SECTION
HORIZONTAL TERMINATION

H2

V2

H1

V1

Figure 21

V1 H1 + H2 max

12" min.

2' 11'

3 12' 6" 34'

4'-25'

FOR V GREATER THAN 25',

SEE FIGURE 16 ON PAGE 20

10' 34'

14'

V1 + H1 + V2

+ H2 max

34'

34'

V1 min = 12"

- 26 -

VERTICAL THROUGH-THE-ROOF VENTING

The maximum vertical run of vent pipe is 45 ft. from the top of the fireplace. The fireplace will support a run of a maximum
of 45 ft. Maintain 1" air space clearances on all sides of vents (2" above horizontal runs).
If an offset is required directly on top of the fireplace, two 45
to create a horizontal offset then to run upwards vertically. Doing so will continue to allow the use of the 45 feet maximum
vertical run.

The M-27 Fireplace must be installed by a qualified Mendota approved serviceperson.

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

2. Cut and frame a 9" x 9" opening in the ceiling centered on the hole drilled in Step No. 1.

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

4. Assemble the desired lengths of vent pipe and elbows to reach from the fireplace flue outlet. Ensure that all vent pipe
and elbow connections are in their fully twist-lock position and that inner pipe joints (DuraVent only) are sealed and
are leak-proof. Maintain 1" airspace clearances to combustibles (2" above horizontal runs). Cut a 9" x 9" opening in
the roof, centered in the small drilled hole placed in the roof in No. 1. The opening should be a sufficient size to meet
all clearance requirements. Continue to assemble lengths of pipe and elbows necessary to reach up through the roof­line. Galvanized pipe and elbows may be utilized in the attic, as well as above the roofline. The galvanized finish is
desirable above the roofline due to its higher corrosive resistance.

o

elbows may be connected directly to the top of this fireplace

a) If an offset is necessary, it is important to support the vent pipe every 3 ft. to avoid excessive stress on the el-

bows and possible separation. Wall straps are available for this purpose.

b) Whenever possible, use 45º elbows instead of 90º elbows. The 45º elbow offers less restriction to the flow

of flue gases and intake air. If a 90º elbow is necessary there must be a minimum of one pipe section rise
from the 90º elbow to the vent cap. A maximum of three 90ºelbows are allowed per installation.

6. Slip the flashing over the pipe sections protruding through the roof. Secure the base of the flashing to the roof with

roofing nails and seal flashing to roof. Ensure the roofing material overlaps the top edge of the flashing. Verify you
have at least the minimum clearance to combustibles at the roofline.

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

a) For multi-story vertical installation, a ceiling fire stop is required at the second floor and any subsequent

floors. The opening should be framed to 9" x 9" inside dimensions as described in step No. 5.

b) Any occupied areas above the first floor, including closets and storage spaces, which the vertical vent passes

through, must be enclosed. The enclosure may be framed and sheet rocked with standard construction mate­rials, however, be sure to maintain minimum allowable clearances between the outside of the vent pipe and
the combustible surfaces of the enclosure.

- 27 -

8. Height "*H" of top of vent cap can be determined as follows:

9. Complete installation with storm collar and vent cap.

"H" DIMENSION

ROOF PITCH FEET METERS

FLAT to 6/12 2 .6

7/12 to 9/12 2 .6
10/12 to 12/12 4 1.2
13/12 to 16/12 6 1.8
17/12 to 21/12 8 2.4

Figure 24

45 FEET

MAXIMUM

TWO(2) 90° ELBOWS
WITH STARTER VERTICAL SECTION
VERTICAL TERMINATION

H

V1

V1 min = 6"

H min = 0"

V2 max = 42-H

V2

V1 H

6" 6' 6"

12"

2' 14'
3' 15' 6"

4'-25'

FOR 'V' GREATER THAN

25', SEE FIG 6 ON P.X

13'

17'

Figure 23

- 28 -

THREE(3) 90° ELBOWS
WITH STARTER VERTICAL SECTION
VERTICAL TERMINATION

H1

H2

V2

H1 + H2 max

V1

6" 6' 6" 34'

12"

10' 34'

V1 + H1 + V2 +

H2 max

2' 11'

34'

V1

3' 12' 6" 34'

V1 min = 6"
V1 + H1 + H2 + V2 (max) = 34'

4'-25'

FOR V GREATER THAN 25', SEE

14'

FIGURE 6 ON PAGE X

Figure 25

34'

THREE(3) 90° ELBOWS

Figure 26

WITH STARTER VERTICAL SECTION
ALL ELBOWS IN HORIZONTAL DISCHARGE POSITION

HORIZONTAL TERMINATION

H1

H2

H3

V

V

12" MIN

2'
3'

4"- 25'

- 29 -

H1 + H2 +H3 MAX

6' MAX
7' MAX
8' MAX

10' MAX

M-27 DOOR OPERATION

TO REMOVE DOOR

1. Use the tool to disconnect the spring latches from the glass frame. Insert tool into hole in latch, pull towards

you and up to disengage latch. There are four spring latches, two on top and one on each side.

2. With both hands, rotate glass frame away
from unit a few inches.

Figure 27

Figure 28

3. Pull glass frame straight up and away from unit.

Figure 29

4. Door is now free from unit.

Figure 30

- 30 -

TO REPLACE DOOR

1. Line up tabs on glass frame with slots in glass
clips on firebox. Insert tabs into slots.

Figure 31

2. After door has been placed into slots,
rotate door towards firebox until gasket
seal is touching the firebox frame.

Figure 32

- 31 -

3. Use the tool provided to connect the spring latches to the glass frame. Insert tool into hole in spring
latch, pull latch up and towards you, then down into slot in glass frame until it catches.

Figure 34

4. Door is now connected and sealed to unit.

Figure 35

- 32 -

REFRACTORY LINER REMOVAL AND INSTALLATION PROCEDURES

Introduction: The Mendota M-27 Gas Fireplace is shipped with a ONE PIECE domed refractory liner factory installed inside the fire-

box. M-27 model fireplaces with part number AA-11-00847 are equipped with a Red Chicago Style (Clinker) Brick
patterned refractory liner. M-27 model fireplaces with part number AA-11-00872 are equipped with a Milano Style
Tiled refractory liner.

It will be necessary to remove and reinstall these liners during initial installation of these gas fireplaces and during
routine or annual inspection and maintenance.

These refractory liners are FRAGILE and the utmost care must be exercised while removing and installing them.
Follow the instructions given below, in sequence, to remove and reinstall the refractory liners. Failure to follow
these instructions may lead to damage to the refractory liner. Damage or breakage caused by mishandling, abuse

or not following these instructions is not covered under the Mendota Warranty.
IMPORTANT: YOU MUST COMPLETE STEPS 7 AND 8 TO GUARANTEE THAT THE REFRACTORY

LINER IS INSTALLED PROPERLY BEFORE FIRING THIS FIREPLACE.

Step 1: Remove the Glass Frame Assembly by using the tool supplied and following instructions in the Door Removal

section in the Installation and Operating Instructions Manual supplied with the M27 fireplace.

: Locate the Andiron Grate that is attached to the Burner Air box Ramp with two ¼” Hex #8x1/2 sheet metal

Step 2

screws. Remove the two ¼” Hex #8x1/2 sheet metal screws using a ¼” nut driver or a ¼” Hex bit in an electric
screw gun. Lift the Andiron Grate out of the firebox.

ANDIRON

GRATE

GLASS
FRAME

- 33 -

Step 3: See Diagrams on this page and follow instructions to loosen brick panel if it is tightly fit inside the firebox. The

same procedures apply for all style refractory liners.

- 34 -

Step 4: Keep the Front-Bottom of the Refractory Liner Stationery and rotate the top domed edge forward and out of the

firebox.

ROTATE TOP
FORWARD

Step 5: Use one hand to support the Refractory Liner’s Dome area from the inside surface. Lift the Refractory Liner up

and slide it out of the Firebox horizontally.

Step 6: Reinstall Refractory Liner inside firebox by following steps 5,4,3,2 and 1 in reverse.

- 35 -

Step 7: Once Refractory Liner is inside the firebox, push rear surface of refractory liner against rear wall of Firebox, firmly.
Step 8: Install Refractory Retainer Bracket (supplied with the Owner’s Manual Packet as shown in the diagrams, below. The Refrac-

tory Retainer Bracket must be installed in the same orientation as shown in the detail view below. The Refractory Retainer
Bracket is designed to push the Refractory Liner against the back wall of the firebox. It is critical that you push the Refrac­tory Liner firmly against the firebox back wall then attach the Refractory Retainer Bracket to hold the Refractory Liner in
that position.

1/4" HEX TEK SCREW

BRICK RETAINER
BRACKET

SCREW HOLE

- 36 -

M-27 LOG SET INSTALLATION INSTRUCTIONS

1. Cut the clear tapes and outer plastic wrap using a sharp utility knife or equivalent. Locate the 2 bags of coals, glowing
embers and the log pieces. Identify each log piece numbered A through G and the Large Chunk coals (H), Small
coals (I) and Glowing Embers (J) per the diagram show on this page.

CAUTION: HANDLE LOG PIECES WITH CARE. LOGS ARE FRAGILE.

- 37 -

Identify the REAR LOG PINS and the MAIN EMBER BED PINS that are pressed onto the Burner Air box.

- 38 -

- 39 -

- 40 -

- 41 - - 41 -

- 42 -

- 43 -

- 44 -

The completed log set shall look as depicted in the Step 14, above.
Add small coals (I), first, in the area between the firebox front edge and the grate bars. Also add small coals (I) in front

and behind the front burner. When adding the small coals, space them ½ inches apart, left to right, to allow combustion
air to flow to burner ports. Otherwise, place them randomly along the burner length and in any area on the firebox floor
you desire.

Add Large Chunk Coals (H) on top of front burner. Space them apart about ¼ inches side to side and bridge coals that
span across the burner ports across the burner tube to the main ember bed (B) so that the coals do not plug any burner
ports. This also provides for a cove under each coal that will glow red and create an attractive ember bed effect. If you
provide large gaps between the large chunk coals and leave the gaps open, the front burner flames will yield random yel­low flames along the front edge and between the coal pieces.

Avoid packing small coals tightly. Doing so will only yield red glow effects.
Loosely spread Glowing embers over the coals and any other burner surfaces, lightly. Do not use large and dense

amounts of glowing embers in any area over burner ports. If taller flames are desired along front burner or rear burner,
add thin layers of glowing embers over burner ports in that area. If sooting occurs around areas where coals or glowing
embers are located, remove and allow more room in that area for gas and air to mix together properly.

- 45 -

M-27 SURROUND KIT

INSTALLATION INSTRUCTIONS

INTRODUCTION

The surround kit, available for the M27 (Chelsea) fireplace, com­pletes the installation. The surround kit is designed to cover the ex­terior structural parts and surfaces of this fireplace. It also provides
for easy access to the commonly used control panels located on the
left and right side of this fireplace. A surround kit must be installed to
complete this fireplace installation. Choose from one of 5 finish and
color options: Gold, Antique Copper, Swedish Nickel, Natural Iron or
Black. Optional Filigree kits (available in the 5 different finishes and
colors) or a Cast Iron Decorative Overlay are available and may be
purchased and installed during the installation of a Surround Kit or at
a later date. If any of these optional kits are to be installed, install
them on the surround parts before you follow these instructions to
install the surround kit on the fireplace.

Identify the parts included with the surround kit.

ITEM DESCRIPTION QTY

1 SURROUND TOP 1
2 SURROUND LEG, LEFT HAND 1
3 SURROUND LEG, RIGHT HAND 1
4 SURROUND, BOTTOM 1
5 TEMPORARY BRACE, LEFT HAND 1
6 TEMPORARY BRACE, RIGHT HAND 1
7 1/8” X 1” HINGE PINS 4
8 WASHER, 1/8” ID. X 5/32 OD 4
9 8-32 HEX NUT 3

10 #8X1/2 SHEET METAL SCREW 8

IMPORTANT

: A Hearth Pad spacer

is supplied with the fireplace. This
item must be removed before you
attempt to install the Surround Kit on
the fireplace.

- 46 -

SURROUND KIT INSTALLATION INSTRUCTIONS

1. Positively identify the Left Hand and Right Hand Surround Legs. The Pull Handle must be located in the bottom

half of the surround leg. Use this item to identify the Left Hand and Right Hand Surround Legs.

NOTE: If the Pull Handles are not
factory-assembled, attach one pull
handle on each (left hand and right
hand) surround leg.

- 47 -

2. Lay the four main surround parts (Top, Left Hand Leg, Right Hand Leg and Bottom) on the floor with their visible

sides facing upwards. See Figure, below.

3. Insert one 1/8” X 1” Hinge Pin into the top and bottom Hinge Pin Holes in the Left Hand and Right Hand Surround

Legs.

4. Slide one 1/8” ID X 5/32” OD spacer washer over each pin.

5. Align Hinge pinholes in Surround Top with the Top Hinge Pins in the Surround Legs. Slide Surround Top over the

Top Hinge Pins until the spacer washer is pinched between the Surround Legs and the Surround Top.

6. Align Hinge pinholes in Surround Bottom with the Bottom Hinge Pins in the Surround Legs. Slide Surround Bot-

tom over the Bottom Hinge Pins until the spacer washer is pinched between the Surround Legs and the Surround
Bottom.

- 48 -

7. Identify and attach the Left Hand and Right Hand Temporary Braces as shown, below. These braces are designed to

keep the assembly as a ONE_PIECE ASSEMBLY during the installation process. These temporary braces will prevent
the Left Hand and Right Hand Surround Legs from closing fully. This is normal.

8. The Surround Parts are now attached together and the assembly is ready to be attached to the fireplace.

- 49 -

9. Before attaching Surround Assembly to the fireplace, remove the Hearth Pad Spacer that is secured to the Floor

Plate of the Fireplace. See Figure X. Remove the two ¼” Hex Head Screws that secure the Hearth Pad Spacer to
the Fireplace and slide it out and discard.

HEARTH PAD
SPACER

10. Identify the Top Center Clip, Side Attachment

Brackets and the #8-32 Studs located on the
backside of the Surround Assembly.

11. Thread one 8-32 nut on each of the three 8-32

studs attached to the Surround Bottom.
Thread the nuts in only about 1/8” and leave
loose.

- 50 -

12. Carefully, stand the Surround Assembly upright. Slide the three (3) studs [attached to the Surround Bottom] into

the three open slots in the fireplace floor plate’s front flange. Do not tighten the nuts at this time.

13. Rotate entire Surround Assembly in towards the fireplace.

14. Make certain that the Side Attachment Brackets slide in between the Outer Skin and the inner heat shield in the

fireplace.

- 51 -

15. Make certain that TOP CENTER CLIP on the back of the Surround Top slides under the inner shield of the fire­place.

CLIP

INNER SHIELD TOP

MAKE SURE CLIP SLIDES

INNER SHIELD

TOP

BELOW INNER SHIELD TOP

ITEM 1

CLIP

16. Loosely secure SIDE ATTACHMENT BRACKETS [part of Surround Top] to unit through slots located in left and

right sides of top surround, see Figure below. Leave screws loose to allow for adjustment and alignment of sur­round.

17. Drive one Sheet Metal Screw upward through the slot in the TOP CENTER CLIP [on the back of Surround Top]

into the hole located in the INNER SHIELD TOP. Leave screw loose for adjustment.

SHEET

METAL

SCREW

- 52 -

18. Remove and discard the Left Hand and Right Hand Temporary Braces.

SURROUND

1/32"

LEFT HAND

SURROUND LEG

TOP

19. Adjustment and Alignment Instructions for Sur-

round

Rotate left hand and Right Hand Surround Legs closed.
Check alignment of Left Hand Surround Leg and Right Hand

Surround Leg to Surround Top

and Surround Bottom. This
Surround Kit is SELF ALIGNING. Only a slight left to
right adjustment needs to be made to make certain that
the gaps between the Surround Top and the Surround
Legs are equal on both the left and right sides.

Open Left and Right Hand Surround Legs. Hold Surround
Top in its final position and tighten the t

tached
the unit.

Sheet Metal Screws to secure the surround kit to

hree loosely at-

- 53 -

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

INSTALLATION CHECK OFF LIST










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

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

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

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

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

be Mendota approved.

LIGHTING CHECK OFF LIST




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

Connect thermostat to speaker terminal panel next to gas valve.













System millivolt readings must be taken by a qualified installer.
CAUTION: Pilot flame must

Check air shutter opening - 0" to 1/4" Nat. gas or 1/4” to 1/2” LP gas.

Carefully follow all Lighting and Log Installation Instructions.

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

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

Note: Do not separate telescoping sections. They must
semblies.

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

register a minimum of 325 millivolt.

be used as complete as-

- 54 -

LIGHTING INSTRUCTIONS

IMPORTANT: Be sure all items on "INSTALLATION CHECK OFF LIST" (PG. 44) have been completed!
CAUTION: If the pilot goes out, be sure to wait a minimum of five minutes before relighting - be sure to always remove

the glass before relighting the pilot.

1. Remove glass door - ALWAYS LIGHT PILOT WITH GLASS
REMOVED!

FIGURE 36:

Gas Valve

2. Make sure any gas supply shut-off cocks are open and Thermostat is
"OFF".

3. Push in Gas Cock Dial Slightly and turn clockwise to "OFF".

4. Wait five (5) minutes to allow gas which may have accumulated in main

burner compartment to escape. If you smell gas, STOP.

INLET PRESSURE TAB

MANIFOLD PRESSURE TAB

ON/OFF GAS CONTROL KNOB

HI/LO REGULATOR

NOTE: Dial cannot be turned from "PILOT" to "OFF" unless dial is

pushed slightly. DO NOT FORCE!

5. Turn Gas Cock Dial Counterclockwise
to "PILOT" position.

6. Depress Gas Cock Dial and push
in red Piezo igniter button. Once
pilot ignites, continue depressing

THERMOPILE THERMOSTAT

THERMOPILE

THERMOSTAT

IMPORTANT: After pilot is lit, a qualified installer should take system mil-

livolt readings and measure gas input and output pressures.
Pilot flame must register a minimum of 325 millivolts.

PILOT ADJ. SCREW

PILOT GAS LINE

dial for about ½ minute. If pilot
does not remain ignited, repeat operation allowing a longer period before releasing Gas Cock Dial.

7. After pilot is lit, turn Gas Dial to "ON".

8. Push Main Burner ON/OFF switch to “on” position. Burners
should light immediately.

9. If Rear Burner does not light, Push Rear Burner ON/OFF
switch to “on”.

10. Push MAIN BURNER ON/OFF SWITCH to ON then OFF to
"cycle" the burner on/off to make certain it ignites promptly
and that the flame runs smoothly around burner curves and
promptly lights both burners.

11. With pilot operating, install log module and coals (see PG.

34). With logs/coals in place, "cycle" the burner again to
make sure of prompt ignition of burner and that the flame

MAIN BURNER
ON/OFF SWITCH

runs smoothly around entire burner. NOTE: Logs will
produce a strong, acrid odor on initial contact with flames.

12. Reinstall glass frame by lining up tabs on the bottom of

REAR BURNER

glass frame over slots on glass clips, which are mounted to
the firebox floor. Then "swing in" upper edge of glass

ON/OFF SWITCH

frame. Carefully pull up and towards you the four (4) spring
loaded clips located on the top and both sides of the firebox
and guide into slots on glass frame.

Figure 37

13. NOTE: Be sure doorframe is "centered" in firebox opening.

14. Turn Gas Dial counterclockwise to "ON" then set Thermostat or push Main Burner ON/OFF switch to turn on burners.
Main burner should now light IMMEDIATELY and flame should not "lift" off burner. If there is any delay in ignition or if
flame

is "lifting off" burner, turn off burner and carefully check for proper installation of logs/coals, vent system and

proper pilot

flame impingement on burner and thermopile. Logs or coals must not block pilot flame or main burner
flame. Vent system must be leak proof.
DO NOT PROCEED WITH OPERATION UNLESS BURNER "CYCLES" ON/OFF WITHOUT DELAYS!

15. To reduce heat output, turn Hi/Lo Knob counterclockwise to desired temperature (see FIGURE 36).

16. Heat output can be reduced to 6,750 BTUH using the Hi-Lo Control. NEVER “over fire" by increasing BTUH above
nameplate specifications. NEVER turn down (reduce) pilot flame to yield thermopile voltage below the minimum 325
millivolts.

17. To reduce the flame and heat down to 6,750 BTUH use the Rear Burner On/OFF Switch to turn off rear burner.

- 55 -

NOTE: The rear burner is controlled by a 9 Volt DC solenoid valve. One 9 Volt cell battery (located behind the control
panel) provides power for this unique feature. Replace with a new high quality 9 Volt battery annually.

18. Open windows for first four hours of operation.

NOTICE: Initial heater start-up will cause some NON TOXIC "off gassing" of adhesives, gasket binders, paint and other
materials. Most nuisance odors will be eliminated after the first two hours of operation; however, slight amounts may be
present during first 24 hours of initial operation. To eliminate all nuisance odors, continuously operate this fireplace on the
HIGH setting for 6 to 8 hours.

SHUT DOWN PROCEDURE:

1. Turn Remote Control, Thermostat and Main Burner ON/OFF Switch to "OFF". Pilot will remain lit for return to normal
service.

2. For complete shutdown turn Gas Cock Dial to "OFF".

WARNING: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper

and dangerous operation. Verify proper operation after servicing.

Figure 38

- 56 -

THERMOSTAT OPERATION AND WALL SWITCH KIT CONNECTIONS

A millivolt rated wall thermostat is supplied with this fireplace. The thermostat should be placed in the same room as the
fireplace, approx. 4-5 ft. off the floor (out of reach of children). DO NOT
on an outside wall.

place thermostat within 8 feet of this fireplace or

CAUTION

: Burner should light immediately after turning thermostat "on". If burner does not come on immediately, turn

the thermostat off and wait 60 seconds before turning on again. If burner does not come on immediately after second try
recheck complete installation of logs, pilot, vent system, etc. To insure proper pilot flame impingement on the thermopile,
log and coals positioning and prompt burner ignition. Do not

operate fireplace if burner does not light immediately. Call

service technician.

NEVER TURN BURNER ON & OFF "QUICKLY" - ALWAYS WAIT 60 SECONDS!

When using remote control, be sure to hold in button firmly until unit lights. DO NOT push button and release quickly be­fore burner lights. Burner should light IMMEDIATELY and then button can be released. If unit does not light immediately,
release button, wait 60 seconds and repeat lighting procedure. If burner does not come on immediately after second try
recheck complete installation. If necessary, contact your Mendota dealer.

CAUTION: THIS CONTROL IS A MILLIVOLT SYSTEM. NO ADDITIONAL POWER SUPPLY CAN OR SHOULD BE USED.

NOTE: If thermostat is located over 25 ft. from fireplace the pilot flame may need to be increased to provide thermopile
output up to 750 millivolt.

Use two-wire, solid copper lead wires per chart and install as
shown in the diagram below.

NOTE: Thermostat Must Be 460-750 Millivolt Rated

CAUTION: THIS CONTROL IS A MILLIVOLT SYSTEM. NO ADDITIONAL
POWER SUPPLY CAN OR SHOULD BE USED.

WIRE SIZE MAX. LENGTH

14 GA. 100 FT.
16 GA. 64 FT.
18 GA. 40 FT.
20 GA. 25 FT.
22 GA. 18 FT.

RECOMMENDED MAXIMUM
LEAD LENGTH (TWO-WIRE)

WHEN USING WALL THERMOSTAT

(CP-2 SYSTEM)

O

RM

HE

T

Figure 39: Thermostat Wiring

E

E

L

N

P

I

U

L

O

Y

C

L

P

P

U

S

S

A

G

T

O

L

I

P

T

T

T

H

O

E

R

T

H

M

T

O

P

PI

L

E

PILOT GAS LINE

T

H

E

R

O

M

T

O

P

P

I

L

E

TO TH

TO THTP

WALL SWITCH

OR

THERMOSTAT

- 57 -

MAKING WIRE CONNECTIONS TO WALL SWITCH KIT #AA-11-00781

Wall Switch Kit #AA-11-00781 is an option and may be connected to remotely control various functions of this fireplace.
Wall Switch Kit #AA-11-00781 provides the following remote functions on your Mendota Fireplace or Insert:

1. ON and OFF control of the Main Gas Valve.

2. ON and OFF control of the Rear Burner Flames.

3. Variable Speed control of the convection air blower.

NOTE: This wall switch kit does not provide thermostatic control of the fireplace or insert. If you desire to control your
Mendota Fireplace or Insert thermostatically, you must install a Millivolt rated wall thermostat. Contact your Mendota
Dealer for detailed information and availability of an appropriate thermostat.

Wire Connections are available on the right side of this fireplace behind the Wiring Access Plate. See Figure 40. Make
wire connections per Figure 48, below. Follow all instructions supplied with the Wall Switch Kit #AA-11-00781.

Figure 40

1/4" HEX SCREW

WIRING ACCESS PLATE

WALL SWITCH KIT

CONNECTION WIRES LOCATED HERE.

REMOTE CONTROL BOX ENDS

AND WALL THERMOSTAT

BLACK

RED

BLACK-WHITE

WHITE

WHITE

Figure 41

18/2 SHEATHED

THERMOSTAT WIRE

RED

TPTH

#1: TO VALVE

- 58 -

BLOWER SYSTEM INFORMATION

WARNING: Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper
and dangerous operation. Verify proper operation after servicing.

Dual blowers are provided as standard equipment with this M-27 fireplace. The dual blowers have an air output rating
of 210 CFM (in free air). This fireplace is designed to operate with the blowers turned OFF or ON. Turning the blower
on increases the overall efficiency of this fireplace and aids in distributing and circulating heat to the room this fireplace
is installed in.

BLOWER OPERATION

The blower speed control (rheostat) supplied with this blower system can turn the blowers ON or OFF and infinitely
regulate the speed of the blowers. The blower output can be regulated by turning the rheostat knob..

NOTE: There will be a time delay in blower operation during "heat-up" (approx. ½ hour) and extended blower opera­tion during "cool-down" of unit (approximately ½ hour).

Figure 42: BLOWER WIRING DIAGRAM

M-27 BLOWER KIT REPLACEMENT PARTS LIST

ITEM

QT'Y

NO.

1 1 15-02-00064 BLOWER, RIGHT H A N D, J 238-100-10101
2 1 15-02-00065 BLO W E R, LEF T HA ND , J238-100-10100
3 1 05-01-00157 SNAP DISC
4 1 10-01-00046 RHEOSTAT w/ OFF

PART

NUMBER

DESCRIPTION

- 59 -

SYMPTOM PROBABLE CAUSES CORRECTIVE ACTION

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

2. Humming or whistling
coming from Fireplace.

3. A change in flame ap­pearance or burner op­eration.

TROUBLE SHOOTING THE M-27 FIREPLACE

A. Incorrect gas pressure
B. Not enough combustion

air

A. Normal operating noise.

A. A change in gas pres-

sure.

B. Carbon dirt or lint.

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

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

Have your gas supplier check for correct gas 7" W.C. Nat. Gas; 11" W.C.
LP Gas). If flame still needs adjustment see "Flame Adjustment" below.
Clean out carbon, spider webs, lint, etc. from shutter area.
Logs and burner.
NEVER BLOCK AIR INTAKE OR OUTLET VENTS.

FLAME APPEARANCE ADJUSTMENT

Figure 43: Air Shutters

Be sure burner and logs are properly installed
(see M-27 Log Set Installation Section). After
burner has been properly installed and oper­ated for one hour, small additional adjustments
to the air shutter may be necessary for final
flame appearance. These small shutter ad­justments can be made by the following pro­cedure:

NOTE: Very small changes in

PUSH

CLOSED

shutter settings make major

changes in flame appearance.

1. Two Air Shutter Control Knobs are located
behind the right side access door. The

PULL
OPEN

shutter control knob located on the top
controls front burner flames. The shutter control knob located on the bottom controls the rear-most burner
flames.

2. Light pilot; install logs and glass, and burn unit for 1/2 hour.

3. If flame is too "blue" push Air Shutter Control Knob inward until flame turns yellow.

4. If flame is too "orange" or is causing sooting pull out knob until flame begins to turn blue. NOTE: If
ing does not stop, turn off fireplace & call Mendota Service Person.

5. IMPORTANT: Try each new shutter setting approx. 1/2 hour before making additional changes.

soot-

NOTE: Changes in front burner flame can be made by re-arranging the coals. Densely packed coals will yield
more glow and blue flames. Loosely packed coals will yield less glow and yellow flames.

CAUTION: Any changes in pilot flame must be made by qualified person and checked with voltmeter.

- 60 -

CUSTOMER INFORMATION

MAXIMUM ALLOWABLE SURFACE TEMPERATURE

Mendota Fireplaces comply with UL Standards for maximum surface temperatures on exposed combustible surfaces ad­jacent to the unit. The Maximum allowable surface temperature is 117° F. over ambient (room) temperature. Thus, if a
room is 70° – 80° the exposed combustible surfaces immediately surrounding the Fireplace can have a surface tempera­ture as high as 187° F. – 197° F. (Too hot to touch). This fireplace is certified to keep all adjacent surfaces close to this
fireplace within the allowed temperature limits as long as all clearances to such surfaces are provided as required in this
manual.

OVER FIRING OF BURNER

NEVER "over fire" units by adjusting gas pressure or drilling out the orifice to increase BTUH above nameplate specifica­tions. Over firing can cause permanent damage to firebox and deterioration of parts and void warranty.

MAINTAINING CORRECT PILOT-FLAME -- PILOT OUTAGE & RELIGHTING

The pilot flame must
Never lower (reduce) pilot flame below this minimum 325-millivolt setting. If pilot flame goes out, always wait 5 minutes
before relighting. Always remove glass when lighting pilot.

CLEANING VIEWING GLASS

The viewing glass should be cleaned periodically. Exterior glass surface may be cleaned with cleaner as desired. To
clean interior surface of glass - use soap and water. CAUTION: Do not

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

00455) or comparable product (contact your dealer).

In some cases (especially propane) additives can cause “crazing” or etching on the glass. This is not a common occur­rence and it is not covered under the warranty. The solution may be to change propane suppliers.

be checked with millivolt meter and must always be a minimum of 325 millivolt.

use oven cleaner to clean glass.

SOOTING

Sooting
surfaces are deemed acceptable. If you observe large soot areas (larger than 1”x1”) on log surfaces or signs of sooting on
the door glass (usually a thin black film on the Fireplace viewing glass or on the outside of the home around the vent cap),
the unit must
"sooting" problems, but Mendota and their dealers are not
not been immediately brought to their attention.

OPERATION DURING POWER FAILURE

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

is caused by improper installation or air shutter operation. However, some small areas of soot deposits on log

be immediately turned off and the local Mendota dealer promptly informed. Mendota dealers will correct

responsible for damage caused by excessive sooting that has

- 61 -

MAINTENANCE

1. ANNUAL MAINTENANCE OF MENDOTA UNITS IS REQUIRED. The following procedures must be performed each
year by a Mendota approved service person. NOTE: Any adjustments to
burner, pilot or logs must

A. Clean all lint and dust build-up around the control. Inspect the condition

of any wiring under the burner for melting or damage.

B. Remove logs & coals and clean away any foreign matter (lint, Carbon,

etc.) on the burner and logs. Be sure the burner ports are "open".
Clean the pilot and under side of the logs for any Carbon deposits.
NOTE: Logs should be visually checked for Carbon "build-up". If car­bon deposits are visible on logs, unit should be turned off and Mendota
service person contacted. Be sure logs are re-installed per instructions

on PAGE 34.
C. Check condition of gaskets, gaskets must be tight, replace if necessary.
D. Periodically check to verify that the vent system and vent cap are open

and free of blockage.
E. Before re-installing glass, have qualified service person check the op-

eration of the pilot with millivolt meter and cycle the burner per

LIGHTING INSTRUCTIONS (see PG. 43). Pilot must read a minimum

of 460 millivolt. Be sure all items in LIGHTING and INSTALLATION

"check off” lists are completed (see PG. 44).

2. COMBUSTION SYSTEM MILLIVOLT READING:

Millivolt readings must be taken by a qualified installer at the time of installation and after any interruption in burner
operation. These readings will establish proper thermopile millivolt generation and assure trouble-free burner opera­tion. Readings must be taken with: a.) Pilot ONLY operating. b.) Main Burner operating.

be done by a qualified Mendota service person.

A. PILOT ONLY OPERATING - Thermostat "OFF” - Minimum Millivolts 325

Using a Millivolt Meter, a millivolt reading should be taken by attaching Meter leads to terminals #1 and #2 on the

main gas valve. The Meter must read a minimum of 325 millivolts with the Pilot Light operating, Thermo-stat

turned "OFF" and Main Burner "OFF". To increase or decrease millivolts (and pilot flame) adjust pilot screw on

control (see Figure 44). Pilot Flame must be a minimum of ¾” long on all three branches.
C. MAIN BURNER OPERATING - Thermostat "ON" - Minimum Millivolts 100

Using a Millivolt Meter a millivolt reading should be taken by attaching Meter leads to terminals #2 and #3 on the

millivolt panel on the main gas valve. The Meter must read a minimum of 100 millivolts with the Gas Cock Dial

turned “ON”, Thermostat "ON" and Main Burner operating. To increase or decrease millivolts (and pilot flame) ad-

just pilot screw on control (see Figure 44:

CHECK

TEST

A

B

C

D

TO TEST CONNE

METER

LEADS

TERMI

COMPLETE

SYSTEM

THERMO-

PILE

OUTPUT
SYSTEM

RESISTANCE

AUTO/
PILOT

DROPOUT

2 & 3
1 & 2

1 & 3
1 & 2

CT

TO

NALS

THERMOSTAT

CONTACTS

CLOSED 100MV OR

OPEN GREATER THAN

CLOSED LESS THAN

OPEN BETWEEN

cally. Exterior glass may be cleaned with cleaner as
desired. Interior glass - use kel kem

“polish plus" (part #
65-06-00455) or comparable product. Do not
cleaner or abrasive cleaners to clean glass. Do not
clean when glass is hot.

2. Periodic visual check of pilot flames is required.

3. Periodic visual check of main burner’s rear and front
flames is required.

).

METER

READING

SHOULD BE

MORE

325 MV

2.8 ohms

120-30 MV

use oven

Figure 44: Millivolt Readings

INLET PRESSURE TAB

MANIFOLD PRESSURE TAB

ON/OFF GAS CONTROL KNOB

HI/LO REGULATOR

THERMOPILE THERMOSTAT

THERMOPILE

THERMOSTAT

1. The viewing glass
should be cleaned periodi-

PILOT ADJ. SCREW

PILOT GAS LINE

- 62 -

BURNER FLAMES GENERAL HEIGHT DIAGRAM

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

- 63 -

NATURAL TO LP GAS CONVERSION

Kit #HA-48-00025 for Mendota Model M-27

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

ORIFICE SIZES REQUIREMENT

:

A Natural Gas to LPG conversion kit #HA-48-00025 must
be ordered and installed to convert the M-27 Fireplace to burn LPG.

LP Conversion Kit #HA-48-00025 contains the following parts: One LP
Pressure Regulator, One LP Pilot Orifice Thimble, One Cap Orifice drill #56
(for rear burner) and One Cap Orifice drill #59 (for front burner). Specifi-
cally, identify the Rear and Front Burner Cap Orifices. Use proper sized drill
bits’ shaft ends to verify orifice sizes.

WARNING: IT IS OF THE UTMOST IMPORTANCE THAT THE

CORRECT BURNER ORIFICE BE INSTALLED FOR BOTH THE REAR AND FRONT BURNERS.

1. Turn off gas supply at the appliance service valve. Identify

the Pressure Regulator on the Valve Body; see Figure 13
on PAGE 45.

2. Using a ¼” flat blade screwdriver, remove 3 screws that

secure the NG Pressure Regulator to the gas valve body
and remove NG Pressure Regulator as shown on PAGE ?,
below. Identify the pressure regulator spring that is located
in the center of the black rubber gasket. Discard both the
black rubber gasket and spring.

3. Install the new LP Pressure Regular onto the gas valve

body in the same position and orientation as the NG Pres­sure Regulator you removed in Step 2, above. The LP
Pressure Regulator can only be mounted in one position.
Secure the LP Pressure Regulator in place using the 3
screws you removed in Step 2. Tighten down using a ¼” flat blade screwdriver.

4. Remove both Rear and Front Burners. Locate and Identify the Rear Burner Orifice Spud and the Front Burner Orifice

Spud. Both Front and Rear Orifice Spuds are removed and installed using a ½” deep well socket and ratchet.

5. Install Rear Burner Orifice #65-14-00056 (#56 drill) for the Rear Burner. Tighten down securely.

6. Install Front Burner Orifice #65-14-00059 (#59 drill) for the Front Burner. Tighten down securely.

7. Install pilot orifice thimble #05-04-00036 (.014”) see Figure 15 for location. Remove and install pilot hood with 7/16”

open-end wrench. (Pilot orifice thimble is located inside pilot hood base).

8. Re-assemble pilot hood. Tighten down until pilot flame hood that is directed

towards thermocouple is aligned properly with thermocouple.

Figure 45

REAR BURNER

LP PRESSURE
REGULATOR

SCREWS

[LEFT SIDE]

PILOT HOOD

7

USE
WRENCH TO
LOOSEN HOOD

"

16

NG PRESSURE
REGULATOR

GAS VALVE BODY

FRONT BURNER
[RIGHT SIDE]

PILOT ORIFICE

Figure 46

- 64 -

LP GAS PRESSURE REQUIREMENTS

Inlet and manifold gas pressure checking taps are located on gas valve. A qualified installer shall take pressure meas­urements at these ports to verify and set the correct gas pressures during the LP Kit installation. Manifold pressure must
be taken at the “MANIFOLD PRESSURE" tap and inlet pressure at the "INLET PRESSURE" tap with the burner operat-

ing by a qualified installer.

DESIRED

INLET

PRESSURE

MINIMUM

INLET

PRESSURE

MAXIMUM

INLET

PRESSURE

MANIFOLD

OUTLET

PRESSURE

AIR SHUTTER

POSITION

L.P. GAS 11.0" W.C.

(2.75 kPa)

TURN GAS VALVE HI-LO KNOB TO "HIGH" POSITION. OUTLET GAS PRESSURES MAY VARY PLUS OR MINUS 5%.

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)

LPG PROPER INPUT RATES:

With the proper orifices installed, as specified above, this fireplace utilizing LP Gas will have a
maximum input rate of 25,000 Btu/Hr.

LEAK TESTING REQUIREMENTS

Prior to completing the conversion process , check for gas leaks with soap

PRESSURE TAP

INLET

and water solution at all plumbing joints prior to placing this appliance into
operation. It is recommended that all gas-plumbing joints, factory
installed and field installed are checked for leaks.

MANIFOLD PRESSURE

TAP

PILOT FLAME AND MAIN BURNER RELATIONSHIP VERIFICATION

Prior to completing the conversion process, the qualified service technician must, light the pilot
light and verify the relationship between the pilot light flames and the main burners. The pilot
light flames directed towards the propagation ports on the rear and front burner must overlap

the propagation ports on the burners. The pilot light flames must be a minimum of ¾” long
and must overlap the propagation ports on both the rear and front burners as shown in

Figure 48. Verify that the burner tubes ignite quickly and the burner flames propagate

Figure 47:

Pressure Test Port

smoothly along the entire length of the burners.

PILOT FLAME LENGTH ADJUSTMENT

If the pilot light flame length is too short or the required minimum thermopile voltage cannot be achieved using the
factory default setting of the pilot light flame length, a qualified installer may adjust the length of the pilot light
flames to meet the two requirements: Minimum Thermopile output voltage shall be 325mV and the pilot light
flames must be long enough to overlap the burner ports as shown in Figure 48.

Figure 48: PILOT FLAMES AND

BURNER PORTS ALIGNMENT

PILOT FLAMES
MUST OVERLAP
BURNER PORTS

- 65 -

COMBUSTION SYSTEM MILLIVOLT READING
Millivolt readings must be taken by a qualified installer once the LPG conversion kit parts have been installed.
These readings will establish proper thermopile millivolt generation and assure trouble-free burner operation. Read­ings must be taken with: a.) Pilot ONLY operating. b.) Main Burner operating.

A. PILOT ONLY OPERATING - Thermostat "OFF" - Minimum Millivolts 325

Using a Millivolt Meter, a millivolt reading should be taken by attaching Meter leads to terminals #1 and #2 on the
main gas valve. The Meter must read a minimum of 325 millivolts with the Pilot Light operating, Thermo-stat
turned "OFF" and Main Burner "OFF". To increase or decrease millivolts (and pilot flame) adjust pilot screw on
control (see Figure 44). Pilot Flame must be a minimum of ¾” long on all three branches.

B. MAIN BURNER OPERATING - Thermostat "ON" - Minimum Millivolts 100

Using a Millivolt Meter a millivolt reading should be taken by attaching Meter leads to terminals #2 and #3 on the
millivolt panel on the main gas valve. The Meter must read a minimum of 100 millivolts with the Gas Cock Dial
turned “ON”, Thermostat "ON" and Main Burner operating. To increase or decrease millivolts (and pilot flame) ad­just pilot screw on control (see Figure 44: Millivolt Readings

).

CHECK

A

B

C

D

TO TEST CONNECT

TEST

COMPLETE

SYSTEM

THERMO-

OUTPUT

SYSTEM

RESISTANCE

AUTO/

DROPOUT

PILE

PILOT

METER

LEADS TO

TERMINALS

2 & 3

1 & 2

1 & 3

1 & 2

THERMOSTAT

CONTACTS

CLOSED 100MV OR

OPEN GREATER THAN

CLOSED LESS THAN

OPEN BETWEEN

METER

READING

SHOULD BE

MORE

325 MV

2.8 ohms

120-30 MV

INLET PRESSURE TAB

MANIFOLD PRESSURE TAB

ON/OFF GAS CONTROL KNOB

HI/LO REGULATOR

WARNING

DO NOT PROCEED WITH OPERATION OF THIS FIREPLACE

UNLESS BURNER "CYCLES" ON/OFF WITHOUT DELAYS!

TH TP #1

TP #2

TH #3

Figure 49: Millivolt Readings

CHECKING FOR NORMAL BURNER (S) IGNITION CHARACTERISTICS

Once the conversion to LPG and all the above steps have been completed, light the main burners.

PILOT ADJ. SCREW

PILOT GAS LINE

Turn Gas Dial counterclockwise to "ON" then set Thermostat or push Main Burner ON/OFF switch to turn on burners.
Main burner should now light IMMEDIATELY and flame should not "lift" off burner. If there is any delay in ignition or if
flame is "lifting off" burner, turn off burner and carefully check for proper installation of logs/coals, vent system and proper
pilot flame impingement on burner and thermopile. Logs or coals must not block pilot flame or main burner flame. Vent
system must be leak proof.

- 66 -

ATTACHING LPG CONVERSION LABELS AND HIGH ALTITUDE DERATION LABEL

Two printed informational labels are included with the LPG Conversion Kit. Attach these two labels to inner surface of the
left side controls access door. If you are derating this appliance at a high altitude, also attach the High Altitude Deration
Label, supplied in the Owner’s Manual Packet, to this same surface.

Prior to attaching the labels, fill in all the information that is requested in these labels.

HIGH ALTITUDE
DERATION LABEL

This appliance has been converted
for use at an altitude of _________
Orifice size __________________
Manifold Pressure ____________
Input (Btu/h)_________________
Fuel Type ___________________
Date of conversion ___________
Converted by ________________

This appliance has been converted for use with LP GAS

EFFECTIVE ALTITUDE______________

INLET PRESSURE (MAX./ MIN): 13"WC / 11 .0" WC

Orifice Sizes: # F__________R__________

Manifold Pressure_____________________

Input (BTU/H)_________________

Date of Conversion _____________________

This appliance was converted on ___________________

to LP Gas with Kit No. HA-48-00025 by

_______________________________

(name & address of organization making this conversion

which accepts the responsibility that this conversion has

THIS VALVE HAS BEEN
CONVERTED FROM
NG TO LPG USING SIT
CONVERSION KIT
CODE 0.907.211

SIT LPG

CONVERSION LABEL

Cet appareil était converti sur le jour - mois - année à

LPgaz avec L'équipement No HA-48-00025 par

(nom & adresse d'organisation faisant cette conversion qui

accepte la responsabilité que cette conversion a été faite

LPG CONVERSION LABEL

M-27 ZC Gas Fireplace

LP KIT #HA-48-00025

been properly made)

____________________

correctement)

Label # 65-01-311

65-01-00312

LEFT SIDE CONTROLS

ACCESS DOOR

- 67 -

VALVE ASSEMBLY REPLACEMENT PARTS

24

16

LP PRESSURE
REGULATOR

NG PRESSURE
REGULATOR

18

23

19

21

20

15

Figure 50: VALVE ASSEMBLY

4

13

9

17

26

14

11

4

1

12

3

25

5

2

7

6

8

22

ITEM PART NO DESCRIPTION ITEM PART NO DESCRIPTION

1 05-02-00313 VALVE, SIT, NATURAL GAS, 225F, 3.5-1.3
2 05-02-00310 VALVE, SOLENOID
3 05-04-00039 PILOT ASSEMBLY, M27

4 65-07-00010 BCF, 3/8 TBE X 1/8MPT COMP ELBOW-AF
5 65-07-00060 BCF, 3/8" X 3/8" X 1/4" MALE

6 65-07-00009 BCF, 3/8 TUBE X 1/4 MPT COMP
7 65-06-01062 CABLE, AIR SHUTTER W/SET COLLAR, 30in
8 65-06-00954 CABLE, AIR SHUTTER W/SET COLLAR

9 HA-48-00021 EXTENSION, SHUTOFF, ASSEMBLY, M27
11 65-14-00045 ORIFICE, #45 NAT [ #56 LPG] 24 05-02-00315 LP PRESSURE REGULATOR (10”-3.3”WC)
12 65-14-00051 ORIFICE, #51 [#59 LPG]
13 65-07-00744 VALVE, BALL 1/2FPT X 3/8 FLARE 26 05-07-00076 THERMOPILE, M27

14 65-07-00748 SWIVEL CONNECTOR, SAE-F SWIVEL TO

NPT-M, 6-6 F6X-S

15 60-05-00049 ELBOW, STREET, 1/2 MPT/ 1/2 FPT, BLACK
16 05-02-00289 NG PRESSURE REGULATOR (3.5-1.3”WC)
17 65-06-00987 BATTERY, 9V ALKALINE
18 05-02-00283 EXTENSION, SHORT KNOB, ON/OFF

19 65-06-01064 SPARK IGNITER, PIEZO
20 10-10-00104 SWITCH, ROCKER #1A822 BLK.
21 10-03-00072 SKYTECH WIRE HARNESS W/ SWITCH
22 10-01-00047 KNOB, BLACK #1260331
23 05-02-00284 EXTENSION, SHORT KNOB, HI/LO

25 05-07-00075 THERMOCOUPLE, M27

- 68 -

,

GLASS FRAME ASSEMBLY REPAIR AND REPLACEMENT

DO NOT substitute other manufac-

turer's materials or components.
DO NOT operate unit with cracked,

broken or missing glass.
DO NOT abuse the glass door by

striking the glass, slamming the
door shut

etc

GLASS

WARNING
Use only authorized parts and
materials obtained from Johnson

GASKET

Gas Appliance Company when
replacing defective or damaged
glass.

WARNING

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

Figure 51

TAB #2

TAB #1

TO REPLACE DAMAGED GLASS

1. Bend Glass Retainer Tabs (Figure 51) up 90 degrees.
Four tabs hold down the glass and gasket assembly.

TAB #4

2. Remove the damaged glass and gasket material. Clean
the inner surface of the glass frame.

3. Assemble new gasket on glass edge starting with the bot­tom left corner. The adhesive on the gasket should make
contact with the glass surface. Use tracer lines in gasket
to determine where the glass should sit on the gasket sur-

TAB #3

face. See Figure 52.

4. Place glass and gasket assembly in glass frame and
carefully bend down glass retainer tabs (Figure 53). Extra
glass retainer tabs are provided should any originally
used tabs break off.

GLASS
RETAINER
TAB

The glass frame assembly and its individual components are
available through Johnson Gas Appliance Company. Contact your
dealer for more detailed ordering information.

GLASS FRAME ASSEMBLY # HA-48-00103

REPLACEMENT PARTS LIST

ITEM PART NUMBER DESCRIPTION

1 HA-48-00002

2 65-02-00103
3 65-06-01063 GLASS, CERAMIC, M27

FRAME, WELDMENT, GLASS,
M27

GASKET, TADPOLE,
3/8”BULB, 3/4” TAIL

Figure 52

GASKET

GLASS

ROTATE GASKET UP
SO ADHESIVE MAKES
CONTACT WITH GLASS
SURFACE

TRACER LINES
IN GASKET

GASKET IN

FLAT FORM

GLASS SHALL SIT BETWEEN
TRACER LINES IN GASKET

ADHESIVE

USE LARGE PLIERS TO
BEND DOWN (4) TABS

AS SHOWN

GASKET

GLASS

Figure 53

- 69 -

,

N

LISTING LABEL INFORMATION

The model information regarding your specific appliance can be found on the rating plate, which is located inside the right
side controls access door. 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.

WARNING: IMPROPER INSTALLATION, ADJUSTMENT, ALTERATION, SERVICE OR MAINTENANCE CAN CAUSE PROPERTY DAMAGE,
PERSONAL INJURY, OR LOSS OF LIFE. REFER TO THE OWNER’S INFORMATION MANUAL PROVIDED WITH THIS APPLIANCE.
INSTALLATION AND SERVICE MUST BE PERFORMED BY A QUALIFIED INSTALLER. DO NOT OPERATE WITH GLASS DOOR REMOVED,
CRACKED, OR BROKEN. THIS VENTED GAS FIREPLACE HEATER IS NOT FOR USE WITH AIR FILTERS. REGISTER KIT MAY BE USED.

MISE EN GARDE: INSTALLATION, RÉGLAGE, MODIFICATION, ENTRETIEN OU DÉPANNAGE NON APPROPRIÉS POURRONT CAUSER
DES BLESSURES OU DES DOMMAGES MATÉRIELS. RÉFÉREZ-VOUS AU MANUEL DU PROPRIÉTAIRE FOURNI AVAC CET APPARIEL. POUR
ASSISTANCE OU RENSEIGNEMENTS COMPLÉMENTAIRES, VEUILLEZ CONSULTER UN INSTALLATEUR EXPÉRIMENTÉ, UNE AGENCE DÉ
DÉPANNAGE/ENTRETIEN OU COTRE COMPAGNIE GAZIERE

NATURAL GAS LP GAS

(GAZ NATUREL) (GAS DE PÉTROLE)
LIQUÉFIÉ (GPL))
INPUT RATING (BTR/HR) 0-610m (ENTREÉ NOMINALE) 27,000 25,000
MIN. INPUT RATING (BTU/HR) 0-610m (MINIMALE ENTRÉE NOMINALE) 6,750 7,000
ORIFICE 0-610m (ORIFICE) FRONT #51 REAR #45 FRONT #59 REAR #56
ORIFICE 610-1370m (ORIFICE) FRONT #52 REAR #46 FRONT #60 REAR #57
INPUT RATING (BTU/HR) 610-1370m 26,200 23,800
MAXIMUM OUTPUT (BTU/HR) (SORTIE MAXIMALE) 21,060 19,500
MANIFOLD PRESSURE (in. w.c./kPa) (PRESSION AU COLLECTEUR) 3.5 10.0
MANIFOLD PRESSURE, LOW (in. w.c./kPa) (PRESSION D’ENTRÉE MINIMALE) 1.3 3.3
MINIMUM INLET PRESSURE (in. w.c./kPa) (PRESSION D’ENTRÉE MINIMALE) 5.0 11.0

THIS APPLIANCE IS ONLY FOR USE WITH THE TYPE OF GAS INDICATED ON THE RATING PLATE AND MAY BE INSTALLED IN AN
AFTERMARKET, PERMANENTLY LOCATED MANUFACTURED (MOBILE) HOME WHERE NOT PROHIBITED BY LOCAL CODES. SEE OWNER’S
MANUAL FOR DETAILS. THIS APPLIANCE IS SUPPLIED WITH A CONVERSION KIT.
CET APPAREIL SERA INSTALLÉ CONFORMÉMÉNT AVEC LES CODES LOCAUX, LE CAS ÉCHÉANT. SI AUCUN CODE

’EXISTÉ, SUIVEZ LA NORME ANSI Z223.1 OULA NORME CAN/CGA (ACNOR)-B149.

UNIT TO FLOOR 0in. (0 mm) GLASS EDGE TO ADJACENT SIDEWALL 12in. (305 mm)
UNIT TO ENCLOSURE SIDEWALL 0in. (0 mm) VENT PIPE TOP TO COMBUSTIBLES 2in. (51 mm)
UNIT TO ENCLOSURE BACK WALL 1in. (25 mm) VENT PIPE SIDES TO COMBUSTIBLES 1in. (0 mm)
UNIT TOP TO ENCLOSURE CEILING 1-1/2in. (38 mm) VENT PIPE BOTTOM TO COMBUSTIBLES 1in. (0 mm)
UNIT TOP TO ROOM CEILING 27-1/2in. (699 mm) 7-1/2” MANTLE ABOVE DISCHARGE AIR OPENING 12in. (305 mm)

MINIMUM CLEARANCES TO COMBUSTIBLE CONSTRUCTION

LISTED DIRECT VENT GAS FIREPLACE HEATER

(POELE AU GAZ HOMOLOGUÉ, À AÉRATION DIRECTE)

(NE DOIT PASÉ UTILISÉ AVEC UN COMBUSIBLE SOLIDE)

JOHNSON GAS APPLIANCE CO. CEDAR RAPIDS, IOWA

CERTIFIED FOR CANADA HOMOLOGUE POUR LE CANADA

NOT FOR USE WITH SOLID FUEL

MANUFACTURED BY (FABRIQUÉ PAR):

TESTED TO (TESTÉ AUX NORMES)

ANSI Z21.88-2002 * CSA 2.33-2002

POUR UTILISATION AVEC LES PORTES EN VERRE CERTIFIÉE L’APPAREIL

CAUTION: HOT WHILE IN OPERATION. DO NOT TOUCH. KEEP CHILDREN, CLOTHING, FURNITURE, AND FLAMMABLE LIQUIDS OR VAPORS
AWAY.
ATTENTION: L’APPAREIL EST CHAUD LORSQU’IL FONCTIONNE. NE PASS TOUCHER L’APPAREIL. SURVIELLER LES ENFANTS. GARDER LES
VÊTEMENTS, LES MEUBLES, L’ESSENCE OU AUTRES LIQUIDES À VAPEUR INFLAMMABLES LOIN DE L’APPAREIL.

ELECTRICAL RATING (COURANT NOMINAL): 120 VOLTS 60 HERTZ LESS THAN 1.5 AMPERES

DO NOT REMOVE OR COVER THIS LABEL

MFG. DATE:

VEILLEZ A NE JAMES ENLEVER NI DISSIMULER CETTE ÉTIQUETTE

MODEL: M-27

SERIAL NO.

65-01-000310

Figure 54

- 70 -

MENDOTA WARRANTY QUALIFICATION & SERVICE REFERENCE FORM

As a part of Mendota's on-going program of customer satisfaction, this Form verifies proper installation and operation. It is im­portant as a reference for future service. It insures long life and trouble-free operation of Mendota fireplaces & stoves and quali­fies the owner for Mendota's lifetime limited warranty. Owner should sign Form when completed and mail a copy along with
Warranty Registration to Mendota. OPTIONALLY, PLEASE REGISTER AT OUR WEBSITE AT:

WWW.JOHNSONGAS.COM/MENDOTA-REGISTRATION.ASP

HOME OWNER: ________________________________ DEALER: ________________________________
ADDRESS: ____________________________________ ADDRESS: _______________________________
CITY/STATE/ZIP: ______________________________ CITY/STATE/ZIP: _________________________
SIGNATURE: __________________________________ PHONE: _________________________________

MODEL #: M-27 __

SERIAL #: ___________ DATE INSTALLED: _______________________

Mendota direct vent fireplaces are sophisticated, hi-tech gas appliances. All installation and operating instructions must
followed. This M-27 fireplace must

be installed and serviced by a qualified Mendota approved service person.

REF:___________________ MENDOTA M-27 INSTALLATION MANUAL

 APPROVED VENT PIPES AND VENT CAP INSTALLED - Per Manual.

Vent pipes must be fully twist-locked and leak proof.

Check minimum and maximum vertical / horizontal and vent runs.
1000ºsealant must be used on inner joints at adjustable pipe sections

.

 CHECK FOR PROPER CLEARANCES TO COMBUSTIBLES & VENT LOCATIONS - Per Manual
 INSTALL PROPER SIZE GAS LINES - CHECK FOR GAS LEAKS - Per Manual
 CHECK FOR CORRECT GAS PRESSURE AT MANIFOLD - Per Manual

a. 3.5 Inches Water Column Maximum - Nat. Gas
b. 10.5 Inches Water Column Maximum - L.P. Gas

 TAKE COMBUSTION SYSTEM MILLIVOLT READINGS [See Manual PG.. 42]

a. Pilot only - [Minimum Millivolts 325] Reading: ___________________________
b. Main burner operating - [Minimum Millivolts 100] Reading: ___________________________

 CYCLE BURNERS ON/OFF FOR PROMPT IGNITION - Per "LIGHTING INSTRUCTIONS"

Burner must light IMMEDIATELY - Flame must travel promptly around "curve" & light burner.

 INSTALL LOGS AND ADJUST FLAME - Per Manual

Check that flame is "stable" and is not "lifting" off burner

Proper pilot flame impingement on thermopile & burner - Air shutter opening: 1/8" Nat. Gas – 1/4-“-1/2" LP

 BRIEF OWNER ON OPERATION AND MAINTENANCE OF UNIT

be carefully

 Light Pilot  Operate Burner  Explain blower "delay" operation

Your Name _______________________________________________________________________

Address __________________________________________________________________________

City ________________________________________ State ______ Zip ______________________

Dealer (Place of Purchase) ___________________________________________________________

City ________________________________________ State ______ Zip ______________________

Date of Purchase _______________________ Serial Number _______________________________

Purchaser's Signature________________________________________________________________

 MENDOTA M-27 DIRECT VENT FIREPLACE

CUT OUT PAGE AND MAIL TO: JOHNSON GAS APPLIANCE CO., 520 E AVE. N.W., CEDAR RAPIDS, IOWA 52405

PLEASE REGISTER AT OUR WEBSITE AT: WWW.JOHNSONGAS.COM/MENDOTA-REGISTRATION.ASP

WARRANTY REGISTRATION

- 71 -

NOTES

- 72 -

NOTES

- 73 -

TAPE SHUT

---------------------------------------------------------------------------------------------------------------------------------------------------------

POSTAGE

NEEDED

JOHNSON GAS APPLIANCE COMPANY

520 E AVENUE N.W.

CEDAR RAPIDS, IA 52405

- 74 -

MENDOTA EXTENDED LIFETIME PROTECTION AND LIMITED WARRANTY

MENDOTA M-27 DIRECT VENT FIREPLACE

Mendota Division of Johnson Gas Appliance Company, 520 E Avenue N.W. Cedar Rapids, Iowa 52405, extends this Extended Lifetime Protection and
Limited Warranty to the original purchaser of a Mendota M-27 Fireplace, which is limited and used under normal home conditions.

STANDARD WARRANTY:

JOHNSON GAS APPLIANCE CO., MENDOTA DIVISION, WARRANTS THAT YOUR NEW MENDOTA FIREPLACE IS FREE FROM
MANUFACTURING AND MATERIAL DEFECTS FOR A PERIOD OF ONE YEAR FROM THE DATE OF INSTALLATION, SUBJECT TO THE
FOLLOWING CONDITIONS AND LIMITATIONS:

EXTENDED LIFETIME WARRANTY:

THE HEAT EXCHANGER, BURNER TUBE COMBUSTION CHAMBER AND OUTER SHIELD OF THE MENDOTA M-27 FIREPLACE ARE
WARRANTED FOR THE LIFETIME OF THE ORIGINAL OWNER, SUBJECT TO PROOF OF PURCHASE AND THE FOLLOWING CONDITIONS
AND LIMITATIONS:

1) This new Mendota Fireplace must be installed & serviced by a competent, authorized service contractor. It must be installed and operated at all
times in accordance with the installation and operating instructions furnished with the Fireplace. All adjustments to logs, coals or burner must be
made by an authorized Mendota person. Any alteration, willful abuse, accident or misuse of the product shall nullify this warranty. This warranty
does not cover glass or log breakage.

This limited warranty does not cover the cost of service calls, the cost of labor to remove or install parts covered by this limited warranty, freight or

other transportation expenses, which may be incurred in connection with obtaining performances under this limited warranty. The remedy for dam­ages as the result of any defects in this product which have been warranted herein is limited to replacement parts and does not include any incidental,
indirect or consequential damages or expenses sustained in connection with the product, including damages to property, except as provided by law.

2) This warranty is non-transferable and is made to the original retail purchaser, provided the purchase was made through an authorized Mendota
dealer.

Mendota is not responsible for any damage to or malfunction of the Fireplace unless caused by a defect in material or workmanship from normal
home use. Damage caused by abuse, improper installation, improper servicing, and installation by unqualified personnel or breech of conditions of
this limited warranty will excuse Mendota from performance of any part of this limited warranty. Mendota has the right to investigate and inspect
the exact, original Fireplace and entire installation (without any alterations or tampering) in the event a claim is made to determine whether the
claimed damage or malfunction was caused by abuse, improper installation or other cause outside this warranty. Mendota is not responsible for any
repairs or material purchases that have not received prior written approval from Mendota.

NOTE: Minor warping of certain parts or discoloration is normal and is not a defect covered by this warranty. Major warping of parts can be caused by

over-firing of your Mendota Fireplace. Over-firing above rated nameplate specification is as contrary to the manufacturer's instructions and may
void this warranty.
This warranty may not be extended by our representatives or any third party in any manner. The company neither assumes, nor authorizes any third
party to assume, on its behalf, any other liabilities with respect to the sale of this Mendota product.

3) Mendota may at its discretion, fully discharge all obligations of this warranty by refunding the wholesale price of the defective part(s).

4) All other warranties - expressed or implied - with respect to the product, its components and accessories, or any obligation/liabilities on the part of
the company are hereby expressly excluded. Products made by other manufacturers, sold with the Fireplace or thereafter, are not covered by this
limited warranty. The use of unauthorized components will make this warranty null and void.

This warranty shall be effective only if the original purchaser of the Mendota appliance is registered with Mendota Division within thirty (30) days of the
date of purchase. Such registration or the failure to register shall not be deemed to create any obligation or liability by the manufacturer and this warranty
with its conditions and limitations shall be the only procedure for obtaining any rights against the manufacturer and expresses the sole obligation and re­sponsibilities of the manufacturer which are offered to the original purchaser and accepted upon purchase of the appliance.

Mendota Division, reserves the right to make changes at any time without notice, in design, material, specifications, prices and the right to discontinue
styles and products.
Some states do not allow the exclusion of limitation of incidental or consequential damages or limitations on how long an implied warranty lasts, so the
above limitation or exclusion may not apply to you. This warranty gives you specific legal rights and you may also have other rights which vary from state
to state.

- 75 -

Johnson Gas Appliance Company

520 E Avenue N.W. - Cedar Rapids, IA 52405

Mendota Hearth Division

WEBPAGE:

Part #85-03-00702

www.johnsongas.com or www.mendotahearth.com