1
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
Installation Manual
Installation and Appliance Setup
CAUTION! Risk of Fire! DO NOT store instruction manuals inside replace cavity.
High temperatures could cause a re.
INSTALLER: Leave this manual with the appliance, not inside the appliance.
CONSUMER: Retain this manual for future reference. Do not store inside the appliance.
NOTICE: DO NOT discard this manual!
• DO NOT store or use gasoline or other am-
mable vapors and liquids in the vicinity of this
or any other appliance.
• What to do if you smell gas
- DO NOT try to light any appliance.
- DO NOT touch any electrical switch. DO
NOT use any phone in your building.
- Leave the building immediately.
- Immediately call your gas supplier from
a neighbor’s phone. Follow the gas sup-
plier’s instructions.
- If you cannot reach your gas supplier, call
the re department.
• Installation and service must be performed
by a qualied installer, service agency, or the
gas supplier.
WARNING:
FIRE OR EXPLOSION HAZARD
Failure to follow safety warnings exactly
could result in serious injury, death, or
property damage.
Models:
This appliance may be installed as an OEM
installation in manufactured home (USA
only) or mobile home and must be installed
in accordance with the manufacturer’s
instructions and the Manufactured Home
Construction and Safety Standard, Title 24
CFR, Part 3280 in the United States, or the
Standard for Installation in Mobile Homes,
CAN/CSA Z240 MH Series, in Canada.
This appliance is only for use with the type(s)
of gas indicated on the rating plate. This
appliance is not convertible for use with other
gases, unless a certied kit is used.
Decorative barrier front must be ordered separately at
time of appliance purchase. See Section 3.B.
DANGER
HOT GLASS WILL
CAUSE BURNS.
DO NOT TOUCH GLASS
UNTIL COOLED.
NEVER ALLOW CHILDREN
TO TOUCH GLASS.
A barrier designed to reduce the risk of
burns from the hot viewing glass is provided
with this appliance and must be installed for
the protection of children and other at-risk
individuals.
MER36MN
MER42MN
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
2
Safety Alert Key:
• DANGER! Indicates a hazardous situation which, if not avoided will result in death or serious injury.
• WARNING! Indicates a hazardous situation which, if not avoided could result in death or serious injury.
• CAUTION! Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
• NOTICE: Used to address practices not related to personal injury.
Note: The term “recommend” or “recommended” does not indicate a requirement. It is a best practice suggested by
Hearth & Home Technologies
®
.
Table of Contents
Installation Standard Work Checklist ....................3
1 Product Specic and Important Safety Information
A. Appliance Certication ............................4
B. Glass Specications ..............................4
C. BTU Specications ...............................4
D. High Altitude Installations .......................... 4
E. Non-Combustible Materials Specication. . . . . . . . . . . . . . 4
F. Combustible Materials Specication .................4
G. Electrical Codes .................................4
H. California ......................................4
I. Requirements for the Commonwealth of Massachusetts . . 5
2 Getting Started
A. Design and Installation Considerations ...............6
B. Good Faith Wall Surface / TV Guidelines. . . . . . . . . . . . . . 7
C. Tools and Supplies Needed .......................10
D. Inspect Appliance and Components .................10
3 Framing and Clearances
A. Appliance Weights and Dimensions ................. 11
B. Decorative Barrier Front Dimension Diagrams. . . . . . . . . 12
C. Appliance Location and Clearances to Combustibles ... 16
D. Constructing the Appliance Chase .................. 24
E. Floor Protection ................................25
4 Termination Location and Vent Information
A. Approved Pipe .................................26
B. Vent Termination Minimum Clearances .............. 26
C. Vent Terminal Clearances ........................28
D. Use of Elbows .................................29
E. Vent Diagrams .................................30
5 Vent Clearances and Framing
A. Vent Clearances to Combustibles .................. 39
B. Wall Penetration Framing/Firestops .................40
C. Ceiling Firestop/Floor Penetration Framing ...........41
D. Install Attic Insulation Shield .......................41
6 Appliance Preparation
A. Vent Collar Preparation ..........................42
B. Prepare For Heat Management ....................43
C. Securing and Leveling the Appliance ...............44
D. Non-Combustible Material (Factory-Installed) ......... 44
7 Venting
A. Assemble Vent Sections. . . . . . . . . . . . . . . . . . . . . . . . . . 45
B. Assemble Slip Sections ..........................47
C. Secure the Vent Sections .........................48
D. Disassemble Vent Sections ....................... 48
E. Vertical Termination Requirements ..................49
F. Horizontal Termination Requirements ...............50
8 Electrical Information
A. General Information .............................51
B. Wiring Requirements ............................53
C. Fan Installation .................................54
D. Service for Fan .................................54
9 Gas Information
A. Fuel Conversion ................................55
B. Gas Pressure .................................. 55
C. Gas Connection ................................55
D. High Altitude Installations ......................... 56
E. Air Shutter Setting ..............................56
F. Service/Replace Appliance Gas Valve ............... 57
10 Finishing
A. Facing Material .................................58
B. Drywall Installation ..............................59
C. Installing a Television ............................ 60
D. Mantel and Wall Projections .......................60
E. Hearth Extension ...............................63
F. Decorative Barrier Front Dimensions for Finishing. . . . . . 63
11 Appliance Setup
A. Remove the Shipping Materials .................... 67
B. Clean the Appliance .............................67
C. Install Black Glass Refractory .....................67
D. Install Driftwood Logs (Optional) ...................68
E. Install Glass Media .............................71
F. Install Rock Jig for Optional Rock Media
(STONES-NATURAL) ...........................72
G. IntelliFire Touch
®
Control System Setup .............73
H. Fixed Glass Assembly Removal and Replacement .....74
I. Install Decorative Barrier Front. . . . . . . . . . . . . . . . . . . . . 74
12 Reference Materials
A. Approved Vent Components List ...................75
B. Accessories ...................................76
= Contains updated information.
3
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
Installation Standard Work Checklist
Customer:
Lot/Address:
Model (circle one): MER36MN MER42MN
Date Installed:
Location of Fireplace:
Installer:
Dealer/Distributor Phone #
Serial #:
Comments: Further description of the issues, who is responsible (Installer/ Builder/ Other Trades, etc) and corrective
action needed _____________________________________________________________________________________
_________________________________________________________________________________________________
_________________________________________________________________________________________________
Comments Communicated to party responsible ____________________ by ______________________on ___________
(Builder / Gen. Contractor/) (Installer) (Date)
Appliance Install YES IF NO, WHY?
Veried that the chase is insulated and sealed. (Pg. 24) ___________________________
Veried clearances to combustibles. (Pg. 16-23) ___________________________
Fireplace is leveled and secured. (Pg. 44) ___________________________
Venting/Chimney Section 7 (Pg 45-50)
Venting conguration complies to vent diagrams. ___________________________
Venting installed, locked and secured in place with proper clearance.
(May need to order separately.) ___________________________
Firestops installed. ___________________________
No insulation or foam materials in contact with venting or between
ceiling/wall shield restops. ___________________________
Attic insulation shield installed. ___________________________
Exterior wall/Roof ashing installed and sealed. ___________________________
Terminations installed and sealed. ___________________________
Electrical Section 8 (Pg 51-54)
Unswitched power (110-120 VAC) provided to the appliance. ___________________________
Switch wires properly installed. ___________________________
Gas Section 9 (Pg 55-57)
Proper appliance for fuel type. ___________________________
Was a conversion performed? ___________________________
Leak check performed and inlet pressure veried. ___________________________
Veried proper air shutter setting for installation type. ___________________________
Finishing Section 10 (Pg 58-66)
Combustible materials not installed in non-combustible areas. ___________________________
Veried all clearances meet installation manual requirements. ___________________________
Mantels and wall projections comply with installation manual requirements. ___________________________
Removed nishing strips prior to start up, if installed. _____________________________
Appliance Setup Section 11 (Pg 67-74)
All packaging and protective materials removed (inside & outside of appliance). ___________________________
Refractory, media and optional logs installed correctly. ___________________________
Glass assembly installed and secured. ___________________________
Accessories installed properly. ___________________________
Decorative barrier front properly installed. Need to order separately. ___________________________
Manual bag and all of its contents are removed from inside/under
the appliance and given to party responsible for use and operation. ___________________________
Started appliance and veried no gas leaks exist. ___________________________
2599-982 1/23
= Contains updated information.
Hearth & Home Technologies recommends the following:
• Photographing the installation and copying this checklist for your le.
• That this checklist remain visible at all times on the appliance until the installation is complete.
This standard work checklist is to be used by the installer in conjunction with, not instead of, the instructions contained in this
installation manual.
ATTENTION INSTALLER:
Follow this Standard Work Checklist
WARNING! Risk of Fire or Explosion! Failure to install appliance according to these instructions could lead
to a re or explosion. Install ONLY components and accessories approved by Hearth & Home Technologies.
Unapproved components and accessories could cause replace to overheat.
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
4
This product is listed to ANSI standards for “Vented
Gas Fireplace Heaters” and applicable sections of “Gas
Burning Heating Appliances for Manufactured Homes
and Recreational Vehicles”, and “Gas Fired Appliances
for Use at High Altitudes”. Also Certied for Installation in
a Bedroom or a Bedsitting Room.
A. Appliance Certication
NOT INTENDED FOR USE AS A PRIMARY HEAT SOURCE.
This appliance is tested and approved as either supplemen-
tal room heat or as a decorative appliance. It should not be
factored as primary heat in residential heating calculations.
NOTICE: This installation must conform with 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 CAN/CGA B149 Installation Codes in
Canada.
1 1
Product Specic and Important Safety Information
D. High Altitude Installations
NOTICE: If the heating value of the gas has been reduced,
these rules do not apply. Check with your local gas utility
or authorities having jurisdiction.
When installing above 2000 feet elevation:
• In the USA: Reduce input rate 4% for each 1000 feet
above 2000 feet.
• In CANADA: Input ratings are certied without a
reduction of input rate for elevations up to 4500 feet
(1370 m) above sea level. Please consult provincial and/
or local authorities having jurisdiction for installations at
elevations above 4500 feet (1370 m).
Check with your local gas utility to determine proper
orice size.
C. BTU Specications
E. Non-Combustible Materials Specication
Material which will not ignite and burn. Such materials are
those consisting entirely of steel, iron, brick, tile, concrete,
slate, glass or plasters, or any combination thereof.
Materials that are reported as passing ASTM E 136,
Standard Test Method for Behavior of Materials in
a Vertical Tube Furnace at 750 ºC shall be considered
non-combustible materials.
F. Combustible Materials Specication
Materials made of or surfaced with wood, compressed pa-
per, plant bers, plastics, or other material that can ignite
and burn, whether ame proofed or not, or plastered or
unplastered shall be considered combustible materials.
G. Electrical Codes
NOTICE: This appliance must be electrically wired
and grounded in accordance with local codes or, in the
absence of local codes, with National Electric Code
ANSI/NFPA 70-latest edition or the Canadian Electric
Code CSA C22.1.
• A 110-120 VAC circuit for this product must be pro-
tected with ground-fault circuit interrupter protection,
in compliance with the applicable electrical codes,
when it is installed in locations such as in bathrooms
or near sinks.
H. California
WARNING: This product and the fuels used to
operate this product (liquid propane or natural
gas), and the products of combustion of such fuels, can
expose you to chemicals including benzene, which is
known to the State of California to cause cancer and
reproductive harm. For more information go to: www.
P65Warnings.ca.gov.
MODELS: MER36MN, MER42MN
LABORATORY: Underwriters Laboratories, Inc. (UL)
TYPE: Direct Vent Heater
STANDARD: CSA / ANSI Z21.88-2019 • CSA 2.33-2019
Models
(U.S. or Canada)
Maximum
Input BTU/h
Minimum
Input BTU/h
Orice
Size (DMS)
MER36MN
(NG)
(0-2000 ft)
34,000 17,000 #35
MER42MN
(NG)
(0-2000 ft)
36,000 18,000 #32
B. Glass Specications
This appliance is equipped with ceramic glass. Replace
glass only with ceramic glass. Please contact your dealer
for replacement glass.
5
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
I. Requirements for the Commonwealth of
Massachusetts
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, including those
owned or operated by the Commonwealth and where the
side wall exhaust vent termination is less than seven (7)
feet above nished grade in the area of the venting, in-
cluding but not limited to decks and porches, the following
requirements shall be satised:
Installation of Carbon Monoxide Detectors
At the time of installation of the side wall horizontal vented
gas fueled equipment, the installing plumber or gas tter
shall observe that a hard wired carbon monoxide detector
with an alarm and battery back-up is installed on the oor
level where the gas equipment is to be installed. In addi-
tion, the installing plumber or gas tter shall observe that
a battery operated or hard wired carbon monoxide detec-
tor with an alarm is installed on each additional level of
the dwelling, building or structure served by the side wall
horizontal vented gas fueled equipment. It shall be the
responsibility of the property owner to secure the services
of qualied licensed professionals for the installation of
hard wired carbon monoxide detectors.
In the event that the side wall horizontally vented gas fu-
eled equipment is installed in a crawl space or an attic,
the hard wired carbon monoxide detector with alarm and
battery back-up may be installed on the next adjacent
oor level.
In the event that the requirements of this subdivision can
not be met at the time of completion of installation, the
owner shall have a period of thirty (30) days to comply
with the above requirements; provided, however, that dur-
ing said thirty (30) day period, a battery operated carbon
monoxide detector with an alarm shall be installed.
Approved Carbon Monoxide Detectors
Each carbon monoxide detector as required in accor-
dance with the above provisions shall comply with NFPA
720 and be ANSI/UL 2034 listed and IAS certied.
Signage
A metal or plastic identication plate shall be permanent-
ly 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 fu-
eled heating appliance or equipment. The sign shall read,
in print size no less than one-half (1/2) in. in size, “GAS
VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OB-
STRUCTIONS”.
Inspection
The state or local gas inspector of the side wall horizon-
tally vented gas fueled equipment shall not approve the
installation unless, upon inspection, the inspector ob-
serves carbon monoxide detectors and signage installed
in accordance with the provisions of 248 CMR 5.08(2)(a)1
through 4.
Exemptions
The following equipment is exempt from 248 CMR 5.08(2)
(a)1 through 4:
• 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
• Product Approved side wall horizontally vented gas fu-
eled equipment installed in a room or structure separate
from the dwelling, building or structure used in whole or
in part for residential purposes.
MANUFACTURER REQUIREMENTS
Gas Equipment Venting System Provided
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 provided by the manufacturer
for installation of the equipment and the venting system
shall include:
• Detailed instructions for the installation of the venting
system design or the venting system components; and
• A complete parts list for the venting system design or
venting system.
Gas Equipment Venting System NOT Provided
When the manufacturer of a Product Approved side wall
horizontally vented gas fueled equipment does not pro-
vide the parts for venting the ue gases, but identies
“special venting systems”, the following requirements
shall be satised by the manufacturer:
• The referenced “special venting system” instructions
shall be included with the appliance or equipment in-
stallation instructions; and
• The “special venting systems” shall be Product Ap-
proved by the Board, and the instructions for that sys-
tem shall include a parts list and detailed installation
instructions.
A copy of all installation instructions for all Product Ap-
proved 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.
See Gas Connection section for additional Common-
wealth of Massachusetts requirements.
Note: The following requirements reference various
Massachusetts and national codes not contained in this
document.
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
6
2 2
Getting Started
A. Design and Installation Considerations
WARNING! Risk of Fire or Explosion! Read all instruc-
tions before starting the installation.
Direct vent gas appliances are designed to operate with
all combustion air siphoned from outside of the building
and all exhaust gases expelled to the outside. No addi-
tional outside air source is required.
Installation MUST comply with local, regional, state and
national codes and regulations. Consult insurance carrier,
local building inspector, re ocials or authorities having
jurisdiction over restrictions, installation inspection and
permits.
Before installing, determine the following:
• Where the appliance is to be installed.
• The vent system conguration to be used.
• Gas supply piping requirements and space for access.
See Section 9 Gas Information.
• Provisions for optional heat management system. If
Passive Heat will be installed, consider location of
discharge opening in relation to venting and other
construction materials. Refer to the installation
instructions included with the Passive Heat kit for details
and the appropriate sections in this manual in terms of
clearances and framing (Section 3), and nishing and
mantels (Section 10).
• Electrical wiring requirements.
• Framing and nishing details.
• Whether optional accessories—devices such as a fan,
wall switch, or remote control—are desired. See Section
12.B for approved accessories.
Improper installation, adjustment, alteration, service or
maintenance can cause injury or property damage. For
assistance or additional information, consult a qualied
service technician, service agency or your dealer.
Installation and service of this appliance should be performed by
qualied personnel. Hearth & Home Technologies recommends
HHT Factory Trained or NFI certied professionals.
7
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
B. Good Faith Wall Surface / TV Guidelines
NOTICE: Surface temperatures listed above are taken with
a temperature measuring probe as prescribed by the test
standard used for appliance certication. Temperatures
on walls or mantels taken with an infrared thermometer
may yield increased temperatures of up to 30 °F (17 °C) or
more depending on the thermometer settings and material
characteristics being measured. Use appropriate nishing
materials that are able to withstand these conditions. For
additional nishing guidelines, see Section 10. Surface
temperatures will vary due to factors such as ceiling height,
room size, nishing materials and installation conguration.
Optional Passive Heat Kit Installed
Figure 2.2 Good Faith Wall Surface Temperatures Above Appliance
With Passive Heat Kit Installed
Figure 2.1 Good Faith Wall Surface Temperatures Above Appliance
MEASUREMENTS FROM
TOP EDGE OF THE OPENING
6 in.
18 in.
24 in.
30 in.
TO CEILING
12 in.
165 °F
APPLIANCE FRONT
150 °F
145 °F
140°F
140 °F
FIREPLACE
OPENING
MEASUREMENTS FROM
TOP EDGE OF THE OPENING
6 in.
18 in.
24 in.
30 in.
TO CEILING
12 in.
115 °F
APPLIANCE FRONT
100 °F
95 °F
90°F
90 °F
FIREPLACE
OPENING
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
8
Figure 2.3 Good Faith TV Guidelines
Good Faith Guidelines for TV Installa�ons Above Appliance
(Passive Heat Not Installed)
BB
A
Appliance
TV
Mantel
A
Notes:
1. These are good faith recommended clearances only and not a guarantee of compliance with all TV
manufacturers’ maximum allowable opera�ng temperatures.
2. Since every home has unique air flow characteris�cs and maximum allowable opera�ng temperatures
can vary from manufacturer to manufacturer and from model to model, actual TV temperatures should
be validated at the �me of each installa�on. TVs should not be used in situa�ons where the actual TV
temperature exceeds the manufacturers’ maximum allowable opera�ng temperatures iden�fied in the
TV’s technical specifica�ons. Contact the TV’s manufacturer directly if you cannot locate this
informa�on or have ques�ons regarding the informa�on.
3. Mantel height and depth must conform to mantel requirements specified in the appliance installa�on
manual.
4. “C” dimension taken from the top of the hood or appliance opening to the bo�om of the TV.
5.
Sugges�ons on how to further reduce TV temperatures:
a. Increase “A” dimension.
b. Increase “C” dimension, however, increasing “B” dimension beyond maximum recommended
typically results in higher temperatures.
TV Wall
Bracket
D
Appliance
C
TV on the wall
TV recessed into the wall
Appliance Opening
Item Minimum Dimensions
A 3 inches
B
2 inches minimum to 3 inches
maximum
20 inches
D
Wall Bracket Depth + TV Thickness
+ 3 inches
C
Appliance
Opening
Appliance
Opening
C
9
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
Figure 2.4 Good Faith Guidelines - Passive Heat Kit Installed
Good Faith Guidelines for TV Installations Above a Fireplace
with Passive Heat Option and an Optional Fan
* Mesh screen required for front discharge or open top discharge passive heat installations with discharge opening of three inches or greater.
NOTE:
The TV installation requirements are the same regardless of whether the Passive Heat kit is installed with a top discharge, side
discharge, or open top discharge.
NOTICE: A mantel is required when both the Passive Heat option and an optional fan are installed.
Life expectancy of the TV will be reduced if a mantel is not present.
A mantel is not required when the Passive Heat option is installed and a fan is not present.
“A” Dimension taken from the front of TV to front of the mantel.
“B” Dimension taken from the top of mantel to bottom of TV.
“C” Dimension taken from the top of the appliance opening to the bottom of the TV.
“D” Minimum mantel depth = Wall bracket thickness + TV thickness + 3 inches
“E” Dimension taken from the top of TV to bottom of discharge opening.
“F” Passive Heat kit is installed with no mantel and no fan. Dimension from appliance opening to bottom of TV.
TV mounted flat
TV mounted at angle
TV Wall Bracket
Appliance
E
E
PASSIVE HEAT DISCHARGE OPENING
PASSIVE HEAT DISCHARGE OPENING
WIRE MESH*
A
B
C
C
B
A
Appliance
Opening
Appliance
Opening
D D
C
B
A
ITEM MINIMUM DIMENSIONS
D
E
3 inches
4 inches
12 inches
12 inches
F
Mantel - required when
both Passive Heat and
Optional Fan are present.
Mantel - required when
both Passive Heat and
Optional Fan are present.
F
F
5-1/4
inch min. 6-1/4 inch max.
Wall Bracket Depth +
TV Thickness + 3 inches
Appliance
Notes:
1. These are good faith recommended clearances only and not a guarantee of compliance with all TV manufacturers’ maximum
allowable opera�ng temperatures.
2. Since every home has unique air flow characteris�cs and maximum allowable opera�ng temperatures can vary from manufacturer
to manufacturer and from model to model, actual TV temperatures should be validated at the �me of each installa�on.
TVs should not be used in situa�ons where the actual TV temperature exceeds the manufacturers’ maximum allowable opera�ng
temperatures iden�fied in the TV’s technical specifica�ons. Contact the TV’s manufacturer directly if you cannot locate this
informa�on or have ques�ons regarding the informa�on.
3. Mantel height and depth must conform to mantel requirements specified in the appliance installa�on manual.
4. Sugges�ons on how to further reduce TV temperatures:
a. Increase “A” dimension.
b. Increase “C” dimension, however, increasing “B” dimension beyond maximum recommended typically results in higher temperatures.
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
10
D. Inspect Appliance and Components
WARNING! Risk of Fire or Explosion! Damaged parts
could impair safe operation. DO NOT install damaged, in-
complete or substitute components. Keep appliance dry.
WARNING! Risk of Fire, Explosion or Electric Shock!
DO NOT use this appliance if any part has been under
water. Call a qualied service technician to inspect the
appliance and to replace any part of the control system
and/or gas control which has been under water.
• Carefully remove the appliance and components from
the packaging.
• The vent system components and decorative barrier
fronts may be shipped in separate packages.
• Media required.
• Report to your dealer any parts damaged in shipment.
Hearth & Home Technologies disclaims any responsibility for,
and the warranty will be voided by, the following actions:
• Installation and use of any damaged appliance or vent
system component.
• Modication of the appliance or vent system.
• Installation other than as instructed by Hearth & Home
Technologies.
• Improper positioning of the logs/media (as applicable) or
the glass assembly.
• Installation and/or use of any component part not approved
by Hearth & Home Technologies.
C. Tools and Supplies Needed
Before beginning the installation be sure that the following
tools and building supplies are available.
Hand Tools Tape measure
Level Framing material
Manometer Framing square
Voltmeter Electric drill and bits (1/4 in., 1/8 in.)
Plumb line Safety glasses/Gloves
Wrenches Reciprocating saw
1/4 in. nut driver Elongated pressure taps
Hammer Flathead screwdriver
Tin Snips
Non-corrosive leak check solution
1/2 - 3/4 in. length, #6 or #8 Self-drilling screws
Caulking material (300 ºF minimum continuous exposure
rating)
11
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
3 3
Framing and Clearances
Appliance Dimensions Table - MER36MN
Figure 3.1 Appliance Dimensions (MER36MN, MER42MN)
N
M
O
U
Ø
HEAT MANAGEMENT
SYSTEMS ACCESS
C
D
B
A
E
F
G
H
I
J
P
Q
R
S
T
V
W
L
K
GAS ACCESS
ELECTRICAL ACCESS
Appliance Dimensions Table - MER42MN
Location Inches Millimeters
I 2-1/8 54
J 47-3/4 1212
K 14-1/4 362
L 8-1/2 216
M 39-13/16 1011
N 28-3/8 721
O 14-3/16 360
P 11-3/16 284
Location Inches Millimeters
A 41 1041
B 38-5/16 973
C 5-3/16 132
D 24-3/4 629
E 34-1/4 870
F 33-1/2 851
G 40-7/8 1038
H 16 406
Location Inches Millimeters
I 2-1/8 54
J 50-1/8 1273
K 2-1/16 52
L 8-5/16 211
M 41-13/16 1062
N 35-3/8 899
O 17-11/16 449
P 11-3/16 284
Location Inches Millimeters
A 48-1/16 1221
B 45-3/16 1148
C 5-3/16 132
D 26-11/16 678
E 41-1/4 1048
F 35-1/2 902
G 42-7/8 1089
H 15-3/4 400
Location Inches Millimeters
Q 21-7/16 545
R 8-1/2 216
S 6 152
T 1/2 13
U 8 203
V 1-1/8 29
W 6-3/8 162
Location Inches Millimeters
Q 21-7/16 545
R 8 203
S 6 152
T 1/2 13
U 8 203
V 1-1/8 29
W 6-3/8 162
A. Appliance Weights and Dimensions
Dimensions are actual appliance dimensions. Use for reference only. For framing dimensions and clearances refer to Section 5.
Appliance Weight Table
Model Pounds Kilograms
MER36MN 160 73
MER42MN 190 86
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
12
B. Decorative Barrier Front Dimension Diagrams
MANOR DECORATIVE BARRIER FRONTS
Figure 3.2 Decorative Barrier Front Dimensions - MANOR
IMPORTANT! This replace requires an installed decorative barrier front to prevent direct contact with the
hot viewing glass. DO NOT operate the replace with the barrier removed.
Decorative barrier front must be ordered at time of replace purchase. If decorative barrier front is not
present, contact dealer.
A B C D E F G
MER36MN MANOR36
in. 32-15/16 25-9/16 28-15/16 1-1/2 4-3/4 32-7/16 33-15/16
mm 837 649 735 38 121 824 862
MER42MN MANOR42
in. 39-8/16 27-3/8 35-15/16 1-1/2 4-3/4 34-7/16 35-15/16
mm 1003 695 913 38 121 875 913
H
Minimum Combustible Mantel Height
at 12 Inch Mantel Depth
(No Passive Heat)
I
Minimum Combustible Mantel Height
at 12 Inch Mantel Depth
with Passive Heat Installed
J
Bottom of
Appliance to
Top of Bottom
Surround
MER36MN MANOR36
in. 19 6 1-1/8
mm 483 152 29
MER42MN MANOR42
in. 19 6 1-1/8
mm 483 152 29
A
B
Barrier Mesh:
Integral to
Decorative Barrier Front
G
D
E
F
I
H
C
TOP OF APPLIANCE
OPENING
BOTTOM OF COMBUSTIBLE MANTEL
BOTTOM OF COMBUSTIBLE MANTEL
PASSIVE HEAT INSTALLED
J
Note: See Section 10 for hearth, mantel and nishing requirements, including complete information for combustible
and non-combustible mantels.
WARNING! Risk of Overheating! DO NOT install combustible or non-combustible ooring or hearth material above
top of bottom surround. Gap between bottom of decorative front and top of bottom surround must be maintained for
proper air ow.
13
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
ENSEMBLE DECORATIVE BARRIER FRONTS
Figure 3.3 Decorative Barrier Front Dimensions - ENSEMBLE
IMPORTANT! This replace requires an installed decorative barrier front to prevent direct contact with the
hot viewing glass. DO NOT operate the replace with the barrier removed.
Decorative barrier front must be ordered at time of replace purchase. If decorative barrier front is not
present, contact dealer.
A B C D E F G
MER36MN ENSEMBLE36
in. 35-13/16 28-5/16 37-13/16 1-9/16 3-5/16 32-7/16 34
mm 910 719 960 40 84 824 864
MER42MN ENSEMBLE42
in. 42-13/16 30-5/16 44-13/16 1-9/16 3-5/16 34-7/16 36
mm 1087 770 1138 40 84 875 914
H
Minimum Combustible
Mantel Height at 12 Inch
Mantel Depth
(No Passive Heat)
I
Minimum Combustible Mantel
Height at 12 Inch Mantel Depth
with Passive Heat Installed
J
Bottom of Appliance
to Top of Bottom
Surround
MER36MN ENSEMBLE36
in. 19 6 1-1/8
mm 483 152 29
MER42MN ENSEMBLE42
in. 19 6 1-1/8
mm 483 152 29
I
H
TOP OF APPLIANCE
OPENING
BOTTOM OF COMBUSTIBLE MANTEL
BOTTOM OF COMBUSTIBLE MANTEL
PASSIVE HEAT INSTALLED
A
B
Barrier Mesh:
Integral to
Decorative Barrier Front
C
E
D
G
F
J
Note: See Section 10 for hearth, mantel and nishing requirements, including complete information for combustible
and non-combustible mantels.
WARNING! Risk of Overheating! DO NOT install combustible or non-combustible ooring or hearth material above
top of bottom surround. Gap between bottom of decorative front and top of bottom surround must be maintained for
proper air ow.
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
14
Figure 3.4 Decorative Barrier Front Dimensions - ESSENCE
IMPORTANT! This replace requires an installed decorative barrier front to prevent direct contact with the
hot viewing glass. DO NOT operate the replace with the barrier removed.
Decorative barrier front must be ordered at time of replace purchase. If decorative barrier front is not
present, contact dealer.
A B C D E F G
MER36MN ESSENCE36BK
in. 34-11/16 28-11/16 38 1-1/8 2-3/8 32 33-3/16
mm 881 729 965 29 60 813 843
MER42MN ESSENCE42BK
in. 41-3/4 30-5/8 45-1/16 1-1/8 2-3/8 34 35-3/16
mm 1061 778 1145 29 60 864 894
H
Minimum Combustible Mantel
Height at 12 Inch Mantel Depth
(No Passive Heat)
I
Minimum Combustible
Mantel Height at 12 Inch
Mantel Depth
with Passive Heat Installed
J
Bottom of
Appliance to
Top of Bottom
Surround
MER36MN ESSENCE36BK
in. 19 6 1-1/8
mm 483 152 29
MER42MN ESSENCE42BK
in. 19 6 1-1/8
mm 483 152 29
I
H
TOP OF APPLIANCE
OPENING
BOTTOM OF COMBUSTIBLE MANTEL
BOTTOM OF COMBUSTIBLE MANTEL
PASSIVE HEAT INSTALLED
A
B
Barrier Mesh:
Integral to
Decorative Barrier Front
C
E
D
G
F
J
Note: See Section 10 for hearth, mantel and nishing requirements, including complete information for combustible
and non-combustible mantels.
ESSENCE DECORATIVE BARRIER FRONTS
WARNING! Risk of Overheating! DO NOT install combustible or non-combustible ooring or hearth material above
top of bottom surround. Gap between bottom of decorative front and top of bottom surround must be maintained for
proper air ow.
15
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
Figure 3.5 Decorative Barrier Front Dimensions - VENTURA
VENTURA DECORATIVE BARRIER FRONTS
Note: See Section 10 for hearth, mantel and nishing requirements, including complete information for combustible
and non-combustible mantels.
IMPORTANT! This replace requires an installed decorative barrier front to prevent direct contact with the hot
viewing glass. DO NOT operate the replace with the barrier removed.
Decorative barrier front must be ordered at time of replace purchase. If decorative barrier front is not present,
contact dealer.
WARNING! Risk of Overheating! DO NOT install combustible or non-combustible ooring or hearth material above
top of bottom surround. Gap between bottom of decorative front and top of bottom surround must be maintained for
proper air ow.
A
B
Barrier Mesh:
Integral to
Decorative Barrier Front
I
H
TOP OF APPLIANCE
OPENING
BOTTOM OF COMBUSTIBLE MANTEL
BOTTOM OF COMBUSTIBLE MANTEL
PASSIVE HEAT INSTALLED
J
C
E
D
G
F
A B C D E F G
MER36MN VENTURA36
in. 35-13/16 28-5/16 37-13/16 1-9/16 3-5/16 32-7/16 34
mm 910 719 960 40 84 824 864
MER42MN VENTURA42
in. 42-13/16 30-5/16 44-13/16 1-9/16 3-5/16 34-7/16 36
mm 1087 770 1138 40 84 875 914
H
Minimum Combustible
Mantel Height at 12 Inch
Mantel Depth
(No Passive Heat)
I
Minimum Combustible Mantel
Height at 12 Inch Mantel Depth
with Passive Heat Installed
J
Bottom of Appliance
to Top of Bottom
Surround
MER36MN VENTURA36
in. 19 6 1-1/8
mm 483 152 29
MER42MN VENTURA42
in. 19 6 1-1/8
mm 483 152 29
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
16
C. Appliance Location and Clearances to
Combustibles
WARNING! Risk of Fire or Burns! Provide adequate
clearance around air openings and for service access.
Due to high temperatures, the appliance should be lo-
cated out of trac and away from furniture and draperies.
When selecting a location for the appliance it is important
to consider the required clearances to walls and allow suf-
cient clearance for heat management systems venting.
Refer to Figure 3.6 for Heat-Zone-Gas and Heat-Out-Gas
heat management systems.
Refer to Figures 3.11-3.13 for information regarding fram-
ing when the Passive Heat Kit is installed. Install the Pas-
sive Heat Kit per the instructions provided with the kit.
NOTICE: Illustrations reect typical installations and are
FOR DESIGN PURPOSES ONLY. Illustrations/diagrams
are not drawn to scale. Actual installation may vary due to
individual design preference.
NOTICE: Allow 18 inches minimum clearance
on top of appliance for venting of heat
management system.
18 IN. MIN.
Figure 3.6 Clearance for Heat Management System
17
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
B
C
A
OUTDOOR FLOORING
ROOF EAVE OVERHANG
DIRECT
VENT GAS
FIREPLACE
A = Bottom of appliance to floor
B = Front of surround to end of overhang
C = Height of covered opening
Protected Outdoor Applications
Figure 3.7 Protected Outdoor Applications - Dimensions
WARNING! Risk of Overheating! Failure to follow in-
structions for outdoor installation could result in appliance
overheating and/or damage to appliance and compo-
nents.
This appliance is approved for use outdoors (outdoor
rooms, patios, decks, three season rooms, freestanding
structures, etc.) when protected from direct water impinge-
ment and when installed in accordance with the guidelines
below.
• Overhang requirements must be applied to both the
front and sides of the replace nished opening.
• Follow all product installation instructions; required
clearances must be maintained with respect to the
house wrap, wall, nishing material, and mantels.
• If the replace will be in contact with salt water spray or
pool chemicals, then a replace model designed specif-
ically for outdoor installation is recommended to avoid
oxidation.
• Changes in surface nish due to outdoor environment
may occur.
• When installed in areas prone to blowing and drifting
snow, it is recommended that the covered area have
screen sides.
• Follow all building codes, including those addressing
replace penetration of an exterior building envelope.
FORMULA MATRIX
A B C
0-6 in. Same as height of
covered opening
Height of covered
opening
6-12 in. 0.75 x height of
covered opening
Height of covered
opening
Greater than 12 in. 0.5 of height of
covered opening
Height of covered
opening
EXAMPLE MATRIX
Minimum clearance examples for installing replace in
covered area with two variables:
1. Bottom of the appliance to the oor
2. Front of the surround to the end of the overhang
A
If height of
opening
is 8 ft
If height of
opening
is 9 ft
If height of
opening
is 10 ft
0-6 in. 8 ft. 9 ft. 10 ft.
6-12 in. 6 ft. 6-3/4 ft. 7-1/2 ft.
Greater than
12 in.
4 ft. 4-1/2 ft. 5 ft.
For Example:
If the opening height (C) is 8 ft., and the distance from the
bottom of the appliance to the oor is 12 in. (A), then the
distance from the front of the surround to the end of the
overhang (B) must be 6 ft. (0.75 x 8).
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
18
Figure 3.8 Appliance Locations
ALCOVE
INSTALLATION
TOP VENT
ONE 90
0
ELBOW
A
A
B
C
B
D
B
F
Refer to Section 10 for mantel and wall
projection information.
Consider the mantel or cabinet system to be
installed and comply with the necessary
requirements for elevated hearth. Refer to
instructions included with cabinet system.
G
H*
E
A B C D
MER36MN
IN. 51 42 72
See Section 10
Mantel
Projections
mm 1295 1067 1829
MER42MN
IN. 55-7/8 49 79
mm 1419 1245 2007
E F G H*
MER36MN
IN. 22 17-3/4 1/2
For terminations
through a 2 x 4
wall, see Figure
3.9.
mm 559 451 13
MER42MN
IN. 22 19-3/4 1/2
mm 559 502 13
H* = When exterior wall is constructed from 2 x 4 material, a termination cap with eective length equal to the
DVP-TRAP1 is required. See Figure 3.9.
19
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
1/2 IN. MIN.
CLEARANCE
BACK OF APPLIANCE TO
WALL SHEATHING
EXTERIOR
SHEATHING 1/2 IN. THICK
INTERIOR SHEATHING
1/2 IN. THICK
4-1/2 IN.
I* = 5 INCHES TO
FRONT OF DVP-TRAP1
TERMINATION CAP
2 X 4
(3-1/2 IN.)
Figure 3.9 DVP-TRAP1 Exception (2 x 4 Construction)
Top Vent DVP-TRAP1 Exception
For installations that are top vented and horizontally terminated with a 90 degree elbow directly o the minimum 6
inch vertical and minimum vent run, a termination cap with eective length equal to the DVP-TRAP1 is REQUIRED.
Interior and exterior wall sheathing 1/2 inch thick and 2 X 4 exterior wall studs are also assumed for this scenario.
DVP90ST
5 IN. MIN
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
20
Figure 3.10 Clearances to Combustibles
* MINIMUM FRAMING DIMENSIONS
A B C** D E F G*** H
Rough
Opening
(Vent Pipe)
Rough
Opening
(Height)
Rough
Opening
(Depth)
Rough
Opening
(Width)
Clearance
to Room
Ceiling
Combustible
Floor
Minimum Hearth
Required
Behind
Appliance
MER36MN
Inches 10 40-1/8 22 42 32 0 0 1/2
Millimeters 254 1019 559 1067 813 0 0 13
MER42MN
Inches 10 42-1/8 22 49 32 0 0 1/2
Millimeters 254 1070 559 1245 813 0 0 13
* Adjust framing dimensions for interior chase sheathing (such as sheetrock).
C** Add 12 inches for rear venting with one 90 degree elbow.
G*** For installations with vinyl ooring, see Section 3.E.
C
B
D
A
E
H
I
F
G
J
MEASURE E FROM TOP OF
APPLIANCE OPENING OR
FROM TOP OF HOOD
K
Note: E and K will change if passive heat is installed.
* MINIMUM FRAMING DIMENSIONS
I J K
Sides of
Appliance
Front of
Appliance
Clearance
to Room
Ceiling
MER36MN
Inches 1/2 36 83-1/2
Millimeters 13 914 2121
MER42MN
Inches 1/2 36 83-1/2
Millimeters 13 914 2121
21
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
Figure 3.11 Passive Heat Front Discharge Framing Dimensions With and Without a Trim Kit
* Measurement for Trim Kit = 3-1/2 in. + Additional Finishing Material Thickness.
** Measurement without Trim Kit = 2 in. + Additional Finishing Material Thickness. If nished discharge opening height
is greater than 3 inches, wire mesh is required.
Framing Dimensions- Passive Heat Front Discharge (PH-MR)
WARNING! Risk of Fire! Wire mesh required on
bottom of discharge opening (Dimension A) when
nished discharge opening is greater than 3 inch-
es. Secure mesh to top of framing.
Front Discharge: Air conveyed into the room through one front discharge slot.
ROOM CEILING
1-1/2 IN. (2 X 4 FRAMING)
2 IN. MIN.
TV
1/2 IN. X 1/2 IN.
WIRE MESH**
CHASE CEILING REQUIRED
WITHIN 3 IN. OF TOP OF OPENING
WIRE MESH**
= PASSIVE HEAT
DISCHARGE OPENING
0-3 IN.
= CHASE CEILING ZONE
CHASE DETAIL
A
D
B
E
C
FRONT DISCHARGE MINIMUM FRAMING DIMENSIONS
A
B C D E
TRIM KIT*
INSTALLED
NO TRIM
KIT**
Required Height of
Discharge Opening
Height of
Discharge
Opening
Clearance to
Top of
Discharge
Opening
Width of
Discharge
Opening
Clearance to
Top of Discharge
Opening From
Bottom of
Appliance
Clearance to
Bottom of Discharge
Opening from
Bottom of Appliance
MER36MN
Inches 3-1/2 2 41 36-1/2 78 76
millimeters 89 51 1041 927 1981 1930
MER42MN
Inches 3-1/2 2 43 42-1/2 80 78
millimeters 89 51 1092 1080 2032 1981
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
22
Figure 3.12 Passive Heat Side Discharge Framing Dimensions
Framing Dimensions - Passive Heat Side Discharge (PH-MR)
WARNING! Risk of Fire! DO NOT place combustible
objects or combustible materials in non-combustible
zone. Appliance and combustible materials will overheat.
Side Discharge: Air conveyed into the room through two discharge registers,
one on each side of appliance.
ROOM CEILING
1-1/2 IN. (2 X 4 FRAMING)
= PASSIVE HEAT
DISCHARGE OPENING
0-3 IN.
= CHASE CEILING ZONE
DISCHARGE OPENING
CHASE CEILING ZONE
CHASE CEILING REQUIRED WITHIN 3 IN.
OF TOP OF OPENING
CHASE DETAIL
APPLIANCE MAY BE INSTALLED
OFF OF FLOOR
B
A
D
C
E
SIDE DISCHARGE FRAMING DIMENSIONS
A B C D E
Height of
Discharge
Opening
Width of
Discharge
Opening
Minimum
Clearance to
Discharge Opening From
Bottom of Appliance
Minimum
Clearance to Ceiling from
Bottom of Appliance
Minimum
Clearance to
Combustible
Materials
MER36MN
MER42MN
Inches 12-1/4 8-3/4 68-1/4 83-1/2 18
millimeters 311 222 1734 2121 457
23
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
Figure 3.13 Passive Heat Minimum Framing Dimensions Open Top Discharge
Framing Dimensions - Passive Heat Open Top Discharge (PH-MR)
WARNING! Risk of Fire! Mesh screen required on bottom of discharge opening when discharge
opening is greater than 3 inches. Secure mesh to top of framing.
Open Top Discharge: Both sides and the top are open allowing air to be conveyed into the room.
*
Mesh screen required for front discharge or open top discharge passive heat installations with discharge
opening of 3 inches or greater.
OPEN TOP DISCHARGE MINIMUM FRAMING DIMENSIONS
A*
B C
Height of
Discharge Opening
Clearance to
Discharge Opening
Width of
Discharge Opening
MER36MN
Inches 2 41 36-1/2
millimeters 51 1041 927
MER42MN
Inches 2 41 42-1/2
millimeters 51 1041 1080
C
A
B
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
24
NOTICE: Install appliance on hard metal or wood surfaces
extending full width and depth. DO NOT install directly on
carpeting, vinyl, or any combustible material other than
wood.
WARNING! Risk of Fire! Maintain specied air space
clearances to appliance and vent pipe:
• Insulation and other materials must be secured to prevent
accidental contact.
• The chase must be properly blocked to prevent blown
insulation or other combustibles from entering and
making contact with replace or chimney.
• Failure to maintain airspace may cause overheating and
a re.
Figure 3.14 Exterior Chase - Minimum Height Requirements
D. Constructing the Appliance Chase
A chase is a vertical box-like structure built to enclose the
gas appliance and/or its vent system. In cooler climates
the vent should be enclosed inside the chase.
NOTICE: Treatment of ceiling restops and wall shield
restops and construction of the chase may vary with the
type of building. These instructions are not substitutes
for the requirements of local building codes. Therefore,
you MUST check local building codes to determine the
requirements to these steps.
NOTICE: Where required by code, install only sprinkler
heads with a sprinkler activation temperature classied
as Extra High.
• Sprinklers inside of chase: Keep sprinkler head away
from vent and chimney.
• Heat Management applications: Maintain 36 inches of
clearance to openings from which heat is discharged
such as convection slots, passive heat registers, heat
zone registers, etc. Refer to Section 6.B for Heat
Management options allowed for this appliance.
Chases should be constructed and insulated in the same
manner as the thermal envelope of the home based on
the code requirements for that climate zone to prevent air
leakage and draft problems. The chase is an extension of
the building thermal envelope.
To further prevent drafts and air leakage, the wall shield
and ceiling restops should be sealed with caulk with
a minimum of 300 ºF continuous exposure rating to
seal gaps. Gas line holes and other openings should
be sealed with caulk with a minimum of 300 ºF continu-
ous exposure rating or stued with unfaced insulation. If the
appliance is being installed on a cement surface, a layer of
plywood may be placed underneath to prevent conducting
cold up into the room.
Minimum height requirements for an exterior chase on a top-
vented appliance are shown in Figure 3.14. Reference Fig-
ure 4.5 for additional clearances.
3 IN. MIN.
* NOTE: If overhang is less than 2 inches, clearance from top of
termination cap to bottom of overhang may be 0 inches.
A - Measured from back of vent cap to end of overhang
B - Measured from bottom of overhang to top of termination cap
Vinyl Siding Shield (TRAP-VSS) Information
TRAP-VSS required if overhang (A) is greater than 3 inches but less
than 5 inches and B dimension is less than 18 inches.
TRAP-VSS recommended if either of the below is true:
- Overhang (A) is less than 5 inches (to combat water infiltration)
- A vinyl overhang is present
A
B*
25
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
12 IN. MIN.
APPLIANCE WIDTH MIN.
12 IN. MIN.
VINYL
Figure 3.15 Vinyl Flooring Recommendations
Vinyl Flooring
E. Floor Protection
Vinyl ooring is sensitive to heat. To avoid damage to
the vinyl ooring, a 12 inch minimum x 12 inch minimum
hearth is recommended when using vinyl ooring up
to the wall. See Figure 3.15. If no hearth is used, it is
recommended to provide a minimum of 30 inches of
clearance in front of the appliance to the vinyl ooring OR
the bottom of the appliance should be raised a minimum
of 24 inches o of the oor to allow the vinyl ooring to be
installed up to the wall.
Hearth and Home Technologies does not recommend
adhesive based vinyl ooring products due to thermal
expansion during operation. Floating style ooring can be
used, but will reach temperatures up to 110 °F (based on
ambient temperature of 70 °F).
Consult the manufacturer’s
ooring specications to ensure compatibility.
NOTICE: Clearances that do not meet the minimum
guidelines could result in damage or buckling to the vinyl
ooring and is done at the installer’s risk.
• Combustible ooring may be located in front of the
appliance. There are exceptions in regards to vinyl
and/or adhesive ooring for these models as noted in
Figure 3.15.
WARNING! Risk of Overheating! DO NOT install com-
bustible or non-combustible ooring or hearth material
above top of bottom surround. Air ow must be main-
tained.
• Flooring and hearth material is allowed up to, but not
above, the top of the bottom surround in order to allow
for proper air ow from appliance. See Figure 3.16.
• The base of the replace may sit on a combustible
surface.
Figure 3.16 Flooring & Hearth Material Allowed
Flooring & Hearth Material (1-1/8 IN. MAX.)
FLOORING OR HEARTH MATERIAL ALLOWED UP TO
TOP OF BOTTOM SURROUND
See Detail A Front View
FRONT VIEW
DETAIL A
FLOORING OR HEARTH MATERIAL
NOT ALLOWED
ABOVE TOP OF BOTTOM SURROUND
AIR FLOW
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
26
B. Vent Termination Minimum Clearances
Roof Pitch H (Min.) Ft
Flat to 6/12...........................................................1.0*
Over 6/12 to 7/12 .................................................1.25*
Over 7/12 to 8/12 .................................................1.5*
Over 8/12 to 9/12 .................................................2.0*
Over 9/12 to 10/12 ...............................................2.5*
Over 10/12 to 11/12 .............................................3.25
Over 11/12 to 12/12 .............................................4.0
Over 12/12 to 14/12 .............................................5.0
Over 14/12 to 16/12 .............................................6.0
Over 16/12 to 18/12 .............................................7.0
Over 18/12 to 20/12 .............................................7.5
Over 20/12 to 21/12 .............................................8.0
Figure 4.1 Minimum Height From Roof to Lowest
Discharge Opening
HORIZONTAL
OVERHANG
VERTICAL
WALL
GAS DIRECT VENT
TERMINATION CAP
12
X
ROOF PITCH
IS X/ 12
LOWEST
DISCHARGE
OPENING
2 FT.
MIN.
20 INCHES MIN.
H (MIN.) - MINIMUM HEIGHT FROM ROOF
TO LOWEST DISCHARGE OPENING
4 4
Termination Location and Vent Information
Fire Risk.
Maintain vent clearance to combustibles as
specied.
• DO NOT pack air space with insulation or other
materials.
Failure to keep insulation or other materials away
from vent pipe could cause overheating and re.
WARNING
Figure 4.2 Staggered Termination Caps
* H minimum may vary depending on regional snowfall.
Refer to local codes.
CAUTION! Risk of Burns! Termination caps are HOT,
consider proximity to doors, trac areas or where people
may pass or gather (sidewalk, deck, patio, etc.). Listed
cap shields available. Contact your dealer.
• Local codes or regulations may require different
clearances.
• Hearth & Home Technologies assumes no responsibility
for the improper performance of the appliance when the
venting system does not meet these requirements.
• Vinyl protection kits are suggested for use with vinyl siding.
• Measure horizontal and vertical termination cap clearances
as noted in Figure 4.3 and 4.4.
Wood or Fuel Oil
Termination Cap
B
*Gas
Termination
Cap
A
A B
6 in. (minimum) up to 20 in.
152 mm/508 mm
18 in. minimum
457 mm
20 in. and over 0 in. minimum
* If
two gas terminations are present, they may be level (B = 0 inches)
provided A is a minimum of 6 inches.
A. Approved Pipe
WARNING! Risk of Fire, Delayed Ignition or Asphyxi-
ation. This appliance requires a separate vent. DO NOT
vent to a pipe serving any other appliance.
This appliance is only approved for use with Hearth &
Home Technologies DVP or SLP venting systems. Re-
fer to Vent Components document included in manual
bag for vent component information and dimensions.
Only use listed decorative termination caps/shrouds with
Hearth & Home Technologies approved venting systems.
DO NOT mix pipe, ttings or joining methods from dier-
ent manufacturers.
The pipe is tested to be run inside an enclosed wall.
There is no requirement for inspection openings at each
joint within the wall.
27
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
B. Vent Termination Minimum Clearances (continued)
Figure 4.4 Measure Horizontal and Vertical Termination
Clearance to Trapezoid Portion of Cap
OVERHANG
C
E
WALL
C and E dimensions are dened in Figure 4.5.
Figure 4.3
H=Measure Horizontal Distances from H
V=Measure Vertical Distances from V
V
V
CLEARANCE
= 6 IN.
H
H
V
V
H
H
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
28
Figure 4.5 Minimum Clearances for Termination
Electrical
Service
V
K
V
K
V
L
C
V
X
= AIR SUPPLY INLET
V
= VENT TERMINAL
= AREA WHERE TERMINAL IS NOT PERMITTED
U.S.A. CANADA
A Clearance above grade,veranda, porch, deck, balcony or roof. 12 in. (305 mm) 12 in. (305 mm)
B Clearance to window or door that may be opened, or to permanently closed window
9 in. min.
(229 mm min.)
12 in. min.
(305 mm min.)
C
clearance below unventilated sot With TRAP-VSS: 14 in. (356 mm) 18 in. (457 mm) 18 in. (457 mm)
clearance below ventilated sot With TRAP-VSS: 14 in. (356 mm) 18 in. (457 mm) 18 in. (457 mm)
clearance below any vinyl sots and electrical service With TRAP-VSS: 26 in. (660 mm) 30 in. (762 mm) 30 in. (762 mm)
D clearance to outside corner 6 in. (152 mm) 6 in. (152 mm)
E clearance to inside corner 6 in. (152 mm) 6 in. (152 mm)
F clearance to each side of center line extended above gas meter/regulator assembly
Clearance in accor-
dance with local in-
stallation codes and
the requirements of
the gas supplier.
3 ft (914 mm)
within a height 15
ft (4.5 m) above
the meter/regula-
tor assembly
G clearance to gas service regulator vent outlet 3 ft (914 mm) 3 ft (914 mm)
H
clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other
appliance termination (mechanical or non-mechanical)
9 in. min.
(229 mm min.)
12 in. min.
(305 mm min.)
I
clearance to a mechanical (powered) air supply inlet
***(All mechanical air intakes within 10 feet of a horizontal termination cap must be a minimum
of 3 feet below termination.)
3 ft (914 mm)*** 6 ft (1.8 m)
J
On public property: clearance above paved sidewalk or a paved driveway.
7 ft (2.1 m) 7 ft (2.1 m)**
**(A vent shall not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings and
serves both dwellings.)
K
clearance from sides of electrical service 6 in. (152 mm) 6 in. (152 mm)
Location of the vent termination must not interfere with access to the electrical service.
L
clearance above electrical service 12 in. (305 mm) 12 in. (305 mm)
Location of the vent termination must not interfere with access to the electrical service.
M
clearance under veranda, porch, deck, balcony or overhang
*(Permitted only if veranda, porch, deck, or balcony is
fully open on a minimum of two sides beneath the oor.)
With TRAP-VSS: 14 in. (356 mm)
18 in.
(457 mm)
18 in.*
(457 mm)*
vinyl or composite overhang 42 in. (1067 mm) 42 in. (1067 mm)
U.S.A. Installations: In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code.
Canadian Installations: In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code.
C. Vent Terminal Clearances
C
J
B
D
B
F
B
A
E
V
V
V
V
V
V
M
H or i
V
G
X
V
H
A
V
V
H
29
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
D. Use of Elbows
Diagonal runs have both vertical and horizontal vent as-
pects when calculating the eects. Use the rise for the
vertical aspect and the run for the horizontal aspect. See
Figure 4.6.
Two 45º elbows may be used in place of one 90º elbow.
On 45º runs, one foot of diagonal is equal to 8-1/2 inch
(216 mm) horizontal run and 8-1/2 inch (216 mm) vertical
run. A length of straight pipe is allowed between two 45º
elbows. See Figure 4.6.
Figure 4.7 shows the vertical and horizontal osets for
DVP or SLP elbows.
Figure 4.6
HORIZONTAL
VERTICAL
RUN
RISE
EFFECTIVE
LENGTH
Y
X
X
X
DVP
Pipe
Eective Length Rise/Run
Inches Millimeters Inches Millimeters
DVP4 4 102 2-3/4 70
DVP6 6 152 4-1/4 108
DVP12 12 305 8-1/2 216
DVP24 24 610 17 432
DVP36 36 914 25-1/2 648
DVP48 48 1219 34 864
DVP6A 3 to 6 76 to 152
2-1/8-4-1/4 54-108
DVP12A 3 to 12 76 to 305
2-1/8-8-1/2 54-216
Vent Type
X
Inches Millimeters
DVP 16-1/4 413
SLP 11-1/4 286
Figure 4.7 Vertical and Horizontal Oset for DVP and SLP Elbows
SLP
Pipe
Eective Length Rise/Run
Inches Millimeters Inches Millimeters
SLP4 4 102 2-3/4 70
SLP6 6 152 4-1/4 108
SLP12 12 305 8-1/2 216
SLP24 24 610 17 432
SLP36 36 914 25-1/2 648
SLP48 48 1219 34 864
SLP6A 3 to 6 76 to 152
2-1/8-4-1/4 54-108
SLP12A 3 to 12 76 to 305
2-1/8-8-1/2 54-216
Vent
Type
X Y
Inches Millimeters Inches Millimeters
DVP 6-5/8 168 16-1/2 419
SLP 5-1/4 133 11-3/8 289
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
30
E. Vent Diagrams
WARNING
Fire Risk. Explosion Risk.
Do NOT pack insulation or other combustibles
between ceiling restops.
• ALWAYS maintain specied clearances around
venting and restop systems.
• Install wall shield and ceiling restops as speci-
ed.
Failure to keep insulation or other material away
from vent pipe may cause re.
WARNING
Fire Risk.
• When using DVP-HRC-SS and DVP-HRC-ZC-
SS termination caps on top vented replaces, a
6 inch minimum vertical vent section is required
before installing rst elbow.
Example: DVP pipe 3 ft. min. vertical = 11 ft. max. horizontal
SLP pipe 7 ft. min. vertical = 11 ft. max. horizontal
1/4 in. max.
(6 mm)
Figure 4.8
General Rules:
• When penetrating a combustible wall, a wall shield
restop must be installed.
• When penetrating a combustible ceiling, a ceiling restop
must be installed.
• Horizontal runs of vent do not require vertical rise;
horizontal runs may be level.
• It is recommended that the horizontal termination cap
have a 1/4 inch downward slant to allow any moisture
in cap to be released. See Figure 4.8.
If venting conguration diers from the vent diagrams on
the following pages (Figure 4.11-4.18), these rules also
apply:
• SUBTRACT 3 ft from the total H measurement for
each 90º elbow installed horizontally.
• SUBTRACT 1-1/2 ft from the total H measurement
for each 45º elbow installed horizontally.
• A maximum of three 90º elbows (or six 45º elbows)
may be used in any vent conguration. Some elbows
may be installed horizontally. See Figure 4.18.
• Elbows may be placed back to back anywhere in
the system.
• Any 90º elbow may be replaced with two back to
back 45º elbows.
• 2 x 45° elbow jog directly o the top of the replace
is allowed but has no V or H value, is permitted
when reducing to SLP pipe, and DOES NOT count
towards total elbow count.
Note: The MER36MN / MER42MN models can adapt
to SLP series vent pipe, if desired.
A DVP-2SL adapter and a minimum 48 inch vertical section
of SLP series vent pipe must be used.
A DVP-SLP24 adapter may also be used with a 24 inch
vertical section of SLP series vent pipe.
After the 48 inch vertical section, the venting table rules
must be followed. The rst 48 inch vertical section is NOT
counted as part of the vertical components in the table. It is
still counted as part of the overall maximum run. All venting
table rules for the vent run must still be followed.
31
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
Measuring Standards:
Vertical and horizontal measurements listed in the vent
diagrams and clearances for termination were made
using the following standards:
• Pipe measurements are shown using the eective length
of pipe. See Vent Components document, included in
manual bag assembly, for information on eective length
of pipe components.
• Horizontal terminations are measured to the outside
mounting surface (flange of termination cap). See
Figure 4.9.
• Vertical terminations are measured to top of last section
of pipe. See Figure 4.10.
• Horizontal pipe installed level with no rise.
MEASURE TO SHADED SURFACE
(OUTSIDE MOUNTING SURFACE)
Figure 4.9 Measure to Outside Mounting Surface
Figure 4.10 Measure to Top of Last Section of Pipe
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
32
Figure 4.11
One Elbow
Top Vent - Horizontal Termination
MER42MN
V
1
Minimum H
1
Maximum
Elbow Only Not Allowed
6 in. 152 mm 2 ft. 610 mm
1 ft. 305 mm 3 ft. 914 mm
2 ft. 610 mm 6 ft. 1.8 m
3 ft. 914 mm 11 ft. 3.4 m
4 ft. 1.2 m 20 ft. 6.1 m
V
1
+ H
1
= 40 ft. (12.2 m) Maximum
H
1
= 20 ft. (6.1 m) Maximum
MER36MN
V
1
Minimum H
1
Maximum
Elbow Only Not Allowed
6 in. 152 mm 7 in. 178 mm
1 ft. 305 mm 11 in. 279 mm
1-1/2 ft. 457 mm 10 ft. 3.0 m
2 ft. 610 m 15 ft. 4.6 m
2-1/2 ft. 762 mm 18 ft. 5.5 m
3 ft. 914 mm 20 ft. 6.1 m
V
1
+ H
1
= 40 ft. (12.2 m) Maximum
H
1
= 20 ft. (6.1 m) Maximum
WARNING! Risk of Fire! Elbow heat shield required
when V
1
= 2 ft. or less. Clearances to combustibles
must be maintained. See Section 5.A.
H
1
V
1
33
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
Figure 4.12
Two Elbows
INSTALLED
HORIZONTALLY
H
1
H
2
V
1
MER36MN
V
1
Minimum H
1
+ H
2
Maximum
Elbow only Not Allowed
6 in. 152 mm Not Allowed
1 ft. 305 mm 4 ft. 1.2 m
1-1/2 ft. 457 mm 11 ft. 3.4 m
2 ft. 610 mm 17 ft. 5.2 m
2-1/2 ft. 762 mm 20 ft. 6.1 m
V
1
+ H
1
+ H
2
= 40 ft. (12.2 m) Maximum
H
1
+ H
2
= 20 ft. (6.1 m) Maximum
V
1
= 1 ft. (305 mm) Minimum
MER42MN
V
1
Minimum H
1
+ H
2
Maximum
Elbow only Not Allowed
6 in. 152 mm Not Allowed
1 ft. 305 mm 2 ft. 610 mm
2 ft. 610 mm 4 ft. 1.2 m
3 ft. 914 mm 6 ft. 1.8 m
4 ft. 1.2 m 8 ft. 2.4 m
6 ft. 1.8 m 12 ft. 3.6 m
10 ft. 3.0 m 20 ft. 6.1 m
V
1
+ H
1
+ H
2
= 40 ft. (12.2 m) Maximum
H
1
+ H
2
= 20 ft. (6.0 m) Maximum
V
1
= 1 ft. (305 mm) Minimum
Top Vent - Horizontal Termination - (continued)
WARNING! Risk of Fire! Elbow heat shield required
when V
1
= 2 ft. or less. Clearances to combustibles
must be maintained. See Section 5.A.
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
34
Figure 4.13
Top Vent - Horizontal Termination - (continued)
Three Elbows
H
2
H
1
V
2
V
1
V
1
Min. H
1
Max. V
2
Min. H
2
Max.
6 in. 152 mm 3 ft 914 mm 6 in. 152 mm 2 ft. 610 mm
1 ft. 305 mm 6 ft. 1.8 m 1 ft. 305 mm 6 ft. 1.8 m
2 ft. 610 mm 11 ft.* 3.4 m* 2 ft. 610 mm 10 ft.* 3.1 m*
3 ft. 914 mm 16 ft * 4.9 m* 3 ft. 914 mm 14 ft.* 4.3 m*
*H
1
+ H
2
= 20 ft. (6.1 m) Maximum V
1
+ V
2
+ H
1
+ H
2
= 40 ft. (12.2 m) Maximum
WARNING! Risk of Fire! Elbow heat shield required
when V
1
= 2 ft. or less. Clearances to combustibles
must be maintained. See Section 5.A.
35
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
Top Vent - Vertical Termination
No Elbow
Figure 4.14
V
1
Note: If installing a vertical vent/
termination o the top of the ap-
pliance, the ue restrictor should
be used.
V
1
= 40 ft. Max. (12.4 m)
V
1
= 3 ft. Min. (914 mm)
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
36
Figure 4.15
Flue Restrictor Instructions
1. Orientate and align the two pieces of the ue restrictor
as shown in Figure 4.16.
2. Refer to Table 4.1 and Figure 4.16 to match the amount
of vertical you have in the system and determine the
appropriate position to set the ue restrictor.
3. Center the two ue restrictor pieces on the vent at the
setting selected in step 2 and secure in place by using
two self-tapping screws. See Figure 4.15.
Table 4.1
Vertical
TOP VENT
NG
4 ft. 1-1
8 ft. 2-2
15 ft. 2-2
20 ft. 3-2
25 ft. 3-2
30 ft. 3-3
35 ft. 3-4
40 ft. 3-4
Top Vent - Vertical Termination (continued)
Note: If the DVP-2SL or DVP-SLP24 adapter is used with SLP pipe, you MUST subtract one number from Table 4.1.
Example: Top vent 40 ft vertical with DVP pipe = 3-4
Top vent 40 ft vertical with SLP pipe = 2-3
Figure 4.16 Setting the Flue Restrictor
FLUE RESTRICTOR INSTALLED
TOP VENTED APPLIANCE
ALWAYS USED WITH THE
HOLES TO THE RIGHT
ALWAYS USED WITH THE
HOLES TO THE RIGHT
FLUE RESTRICTOR SET TO 4-4
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5
1 2 3 4 5
TO BREAK APART
BEND HERE
37
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
Figure 4.17
Two Elbows
V
1
H
1
Maximum V
2
V
1
+ V
2
Min.
Elbow only 2 ft. 610 mm * * *
6 in. 152 mm 6 ft. 1.8 m * * *
2 ft. 610 mm 11 ft. 3.4 m * * *
3 ft. 914 mm 16 ft. 4.9 m * * *
4 ft. 1.2 m 20 ft. 6.1 m * * *
V
1
+ V
2
+ H
1
= 50 ft. (15.2 m) Maximum
*No specic restrictions on this value EXCEPT
V
1
+ V
2
+ H
1
cannot exceed 50 ft (15.2 m)
H
1
V
1
V
2
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
38
Figure 4.18
Top Vent - Vertical Termination - (continued)
Three Elbows
INSTALLED
HORIZONTALLY
H
1
H
2
V
1
V
2
V
1
H
1
+ H
2
V
2
V
1
+ V
2
Minimum H
1
+ H
2
Maximum
Elbow only 1 ft. 305 mm * * * 1 ft. 305 mm
6 in. 152 mm 2 ft. 610 mm * * * 2 ft. 610 mm
1 ft. 305 mm 2 ft. 610 mm * * * 2 ft. 610 mm
2 ft. 610 mm 4 ft. 1.2 m * * * 4 ft. 1.2 m
3 ft. 914 mm 9 ft. 2.7 m * * * 9 ft. 2.7 m
4 ft. 1.2 m 18 ft. 5.5 m * * * 18 ft. 5.5 m
H
1
+ H
2
= 20 ft. (6.1 m) Maximum V
1
+ V
2
+ H
1
+ H
2
= 40 ft. (12.2 m) Maximum
39
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
5 5
Vent Clearances and Framing
Figure 5.1 Horizontal Venting Clearances To Combustible
Materials
WARNING! Risk of Fire! Elbow heat shield required
when V
1
= 2 ft. or less. Clearances to combustibles must
be maintained. See Figure 4.11.
A. Vent Clearances to Combustibles
WARNING! Risk of Fire! Maintain air space clearance
to vent. DO NOT pack insulation or other combustibles:
• Between ceiling restops
• Between wall shield restops
• Around vent system
Failure to keep insulation or other material away from
vent pipe could cause overheating and re.
SCREW
3 in.
(76 mm)
To Install Elbow Heat Shield:
1. Remove the elbow heat shield from the shipping posi-
tion by removing screws.
2. Fasten the shield in place using the four pilot holes.
The shield should be oriented such that the dimension
(longest dimension) is running in the same direction
the elbow is pointing. The shield should be centered
directly above the elbow, and positioned so that it cre-
ates a 1/2 inch airspace between the shield and the
combustible surface. See Figure 5.2.
Top vented appliances: Installation of the elbow heat
shield is required when the clearance to combustible ma-
terial above the rst 90 degree vent elbow is three inches
or less. See Figure 5.1.
Note: A minimum of three inches clearance from the top
of the pipe to any combustible material must always be
maintained.
WARNING! Risk of Fire! Elbow heat shield MUST be
installed if required. Overheating will occur.
Elbow Heat Shield
CORRECT INCORRECT
COMBUSTIBLE SURFACE
DIRECTION
UP
HEAT SHIELD
90º ELBOW
Figure 5.2 Elbow Heat Shield Installation
* When using SLP pipe, minimum clearances from the vent pipe to combustible
materials at inside wall firestops are: Top: 2-1/2 in. (64 mm)
Bottom: 1/2 in. (13 mm)
Sides: 1 in. (25 mm)
Note: Heat shields MUST overlap by a minimum of 1-1/2 in. (38 mm).
• DVP heat shield - designed to be used on a wall 4 in. to 7-1/4 in. (102 mm to 184
mm) thick.
• If wall thickness is less than 4 in. the existing heat shields must be field trimmed. If
wall thickness is greater than 7-1/4 in. a DVP-HSM-B will be required.
• SLP heat shield - designed to be used on a wall 4-3/8 in. to 7-5/8 in. (111 mm to
194 mm thick).
• If wall thickness is less than 4-3/8 the existing heat shields must be field trimmed.
If wall thickness is greater than 7-5/8 in. a DVP-HSM-B will be required.
(DVP-SLP Pipe Shown)
3 in. (76 mm)
top clearance *
1 in. (25 mm)
clearance
bottom & sides
Heat
Shield
Wall
Shield
Firestop
Heat
Shield
WALL
3 in. (76 mm)
top clearance min.
1 in. (25 mm)
clearance around
vertical sections
Elbow
Heat
Shield
Warning! Risk of Fire: Elbow heat shield required with 3 inch top
clearance or V1 of 2 ft. or less.
V1
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
40
A*
B
10 in.
12 in.
Figure 5.4 Wall Penetration
* Shows center of vent framing hole for top or rear venting. The center
of the hole is one (1) in. (25 mm) above the center of the horizontal
vent pipe.
B. Wall Penetration Framing/Firestops
Combustible Wall Penetration
Whenever a combustible wall is penetrated, you must
frame a hole for the wall shield restop(s). The wall shield
restop maintains minimum clearances and prevents cold
air inltration.
• The opening must be framed on all four sides using the
same size framing materials as those used in the wall
construction.
• SLP pipe - A wall shield restop must be placed on each
side of an interior wall. A minimum 1-1/2 in. (38 mm)
overlap of attached heat shields must be maintained.
• DVP pipe - A wall shield restop is required on one side
only on interior walls. If your local inspector requires a
wall shield restop on both sides, then both wall shield
restops must have a heat shield (refer to Section
12.A.) attached to them.
• See Section 7.F. for information for regarding the instal-
lation of a horizontal termination cap.
Non-Combustible Wall Penetration
If the hole being penetrated is surrounded by non-com-
bustible materials such as concrete, a hole with diameter
one inch greater than the pipe is acceptable.
Whenever a non-combustible wall is penetrated, the wall
shield restop is only required on one side and no heat
shield is necessary.
DO NOT PACK VENT FRAMING HOLE WITH INSULATION
OR OTHER MATERIAL.
Note: Center of the horizontal vent pipe to the vertical measuring
surface of a trap cap is 5 inches (127 mm).
Elbow and Oset Clearances to Combustibles
Figure 5.3 Clearances from Vent to Combustible Framing
Materials
3 IN. VERTICAL CLEARANCE
HORIZONTAL PIPE SECTIONS
1 IN. MIN.
ALL SIDES
1 IN. MIN. HORIZONTAL
CLEARANCE
VERTICAL PIPE SECTIONS
= NO COMBUSTIBLES ALLOWED
IN SHADED AREA
1 IN. MIN.
ALL SIDES
1 IN. MIN.
ALL SIDES
A* B
MER36MN
in. 48-3/4 47-3/4
mm 1238 1212
MER42MN
in. 51-1/8 50-1/8
mm 1299 1273
41
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
D. Install Attic Insulation Shield
WARNING! Fire Risk. The use of an attic
shield is required to prevent loose materials
or insulation from contacting the vent causing
overheating and a re.
The International Fuel Gas Code requires an
attic shield constructed of 26 gauge minimum
steel that extends at least 2 in. (51 mm) above
insulation.
• Attic insulation shields must meet specied
clearances to combustible materials and be
secured in place.
• An attic insulation shield kit is available from
Hearth & Home Technologies. Contact your
dealer to order. Install attic insulation shield
according to instructions included with kit.
C. Ceiling Firestop/Floor Penetra-
tion Framing
WARNING! Risk of Fire! DO NOT pack insu-
lation around the vent. Maintain clearances to
vent to prevent overheating.
A ceiling restop MUST be used between
oors and attics.
• DVP pipe only - Frame an opening 10 in.
by 10 in. (254 mm by 254 mm) whenever
the vent penetrates a ceiling/oor (see
Figure 5.5).
• SLP pipe only - Frame opening 9 in. x 9
in. (229 mm x 229 mm) whenever the vent
penetrates a ceiling/oor (see Figure 5.5).
• Frame the area with the same sized lumber
as used in ceiling/oor joist.
• The ceiling restop may be installed above or
below the ceiling joists when installed with an
attic insulation shield. It must be under joists
between oors that are not insulated. Refer
to Figure 5.6.
• Secure in place with nails or screws.
Figure 5.5 Installing Ceiling Firestop
Figure 5.6 Installing the Attic Shield
INSTALL ATTIC INSULATION SHIELDS
BEFORE OR AFTER INSTALLATION OF VENT SYSTEM
CEILING FIRESTOP
INSTALLED BELOW CEILING
CEILING FIRESTOP
INSTALLED ABOVE CEILING
ATTIC ABOVE
A
PIPE
DVP
SLP
A
10 in. (254 mm)
9 in. (229 mm)
A
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
42
CAUTION! Risk of Cuts, Abrasions or Flying Debris.
Wear protective gloves and safety glasses during instal-
lation. Sheet metal edges are sharp.
NOTICE: Once appliance is set up for top or rear venting,
it CANNOT be changed at a later time.
A. Vent Collar Preparation
Top Vent
6 6
Appliance Preparation
REMOVE
SCREWS
Figure 6.1 Remove Elbow Heat Shield by Removing
Two Screws
Figure 6.2 Cut Seal Cap Strap Using a Tin Snips
and Bend the Pieces to 90 Degrees and
Remove Seal Cap
NOTICE: Once the seal cap has been removed it CANNOT
be reattached.
Figure 6.3 (Generic Fireplace Shown) To attach the rst
section of vent pipe, make sure to use the vent gasket in
the manual bag to seal between the rst vent component
and the outer replace wrap. Seal with four screws or
caulk with a minimum of 300 ºF continuous exposure rating
may be used to hold the part in place.
Secure the rst section of venting to the replace by screw-
ing through the two straps left over from cutting the seal
cap strap (Figure 6.6).
It is acceptable to use screws no longer than 1/2 in. (13
mm) to hold outer pipe sections together. If predrilling
holes, DO NOT penetrate inner pipe.
TIN SNIPS
VENT GASKET
43
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
B. Prepare For Heat Management
Figure 6.4 Heat Management Knockout Locations
WARNING! Risk of Fire! DO NOT block passive heat
registers! Overheating of appliance and combustible
materials will occur.
WARNING! Risk of Fire! DO NOT remove a knockout
unless a heat management system will be installed in its
place. Appliance and combustible materials will overheat.
Introduction
An optional heat management system allows the heat from
the appliance to be redirected as desired.
An optional heat management system must be installed by
a qualied service technician at the time of the appliance
installation. Follow the instructions shipped with the kit for
installation and operation.
Heat Management System options are:
• HEAT-ZONE
®
-GAS: The heat is diverted into an
adjacent room. The HZMR-ADP Heat-Zone Adapter
kit may be required and is ordered separately. See
Table 6.1.
• HEAT-OUT-GAS: The heat is diverted outside the
home/building.
• Passive Heat (PH-MR): The heat is vented into the
room in which the appliance is installed through a
discharge opening(s).
NOTICE: Additional clearances are required for heat
management systems installations. Provisions must be
made in advance to ensure t within the framing.
• Determine the heat management system(s) that will be
installed.
• Locate the two heat management knockouts on the top of
the appliance. Remove the knockout from the replace
and discard it See Figure 6.4. Either one or two heat
management systems may be installed. Remove the
knockout(s) from the appliance with a tin snips.
• Center the duct collar around the exposed hole and
attach it to the appliance with 3 screws.
Note: Do this BEFORE nal positioning of the appliance.
• Determine the location for the air register/fan housing
assembly.
Reference the appropriate instructions included with the
kit for the remaining installation steps.
PASSIVE HEAT REAR
COVER KNOCKOUTS
PASSIVE HEAT ADAPTER
KNOCKOUTS
PASSIVE HEAT FRONT
COVER KNOCKOUT
HEAT-ZONE
®
-GAS / HEAT-OUT-GAS
KNOCKOUT LOCATIONS
These models may utilize two Heat Management
Systems.
The HEAT-OUT-GAS kit may be used with either HEAT-
ZONE
®
-GAS or one of the Passive Heat options.
Passive Heat may be used with HEAT-OUT-GAS or one
HEAT-ZONE
®
-GAS. The dedicated knockouts, as shown
in Figure 6.4, must be used only as indicated.
Note: When a fan is operated with the Passive Heat
system, there will be a decrease in the amount of air
owing from the appliance opening. Air will be owing
from both the appliance opening and the passive heat
opening.
HZMR-ADP
HEAT-ZONE-GAS Required
HEAT-ZONE-GAS + PASSIVE HEAT Not Required
Table 6.1 HZMR-ADP Kit
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
44
Figure 6.5 Proper Positioning and Securing of an Appliance
Figure 6.6 Positioning the Appliance Squarely
Note: Diagonal dimensions (A) and (B) must be
within 1/4 inch of each other.
C. Securing and Leveling the Appliance
Risk of Fire!
Prevent contact with:
• Sagging or loose insulation
• Insulation backing or plastic
• Framing and other combustible
materials
WARNING
DO NOT remove standos or notch the framing
around the appliance standos.
Failure to maintain air space clearance could
cause overheating and re.
Block openings into the chase to prevent entry
of blown-in insulation. Make sure insulation and
other materials are secured.
The diagram shows how to properly square, position, and
secure the appliance. See Figures 6.5 and 6.6. Nailing
tabs are provided to secure the appliance to the framing
members.
• Bend out nailing tabs on each side.
• Place the appliance into position.
• Keep nailing tabs ush with the framing.
• Level the appliance from side to side and front to back.
• “Square” the appliance by securing diagonal dimensions
to within 1/4 inch of each other. See Figure 6.6.
• Shim the appliance as necessary. It is acceptable to use
wood shims underneath the appliance.
• Secure the appliance to the framing by using nails or
screws through the nailing tabs. Use a minimum of one
fastener per nailing tab.
• Optional: Secure the appliance to the oor by inserting
two screws through the pilot holes at the bottom of the
appliance.
NAILING TABS
(BOTH SIDES)
A
B
WARNING! Risk of Fire! DO NOT remove factory-in-
stalled non-combustible material.
A non-combustible board is factory-installed above the
replace opening. Do not remove.
The factory supplied non-combustible board spans the
distance from the top of the replace to the center of the
framing header. This board must be used. See Figure 6.7.
FACTORY-INSTALLED NON-COMBUSTIBLE BOARD
DO NOT REMOVE
6-5/16 IN.
Figure 6.7 Non-Combustible Board - Generic Decorative Barrier
Front Shown
D. Non-Combustible Material (Factory-In-
stalled)
45
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
7 7
Venting
A. Assemble Vent Sections
(DVP Pipe Only)
Attach Vent to the Firebox Assembly
Note: The end of the pipe sections with the lanced tabs
will face toward the appliance.
Attach the rst pipe section to the starting collar:
• Lanced pipe end of the starting collar.
• Inner pipe over inner collar.
• Push the pipe section until all lanced tabs snap in place.
• Lightly tug on pipe to conrm it has locked.
Assemble Pipe Sections
Per Figure 7.2:
• Start the inner pipe on the lanced end of section A into
the ared end of section B.
• Start the outer pipe of section A over the outer pipe of
section B.
• Once both vents sections are started, push rmly until
all lanced tabs lock into place.
• Lightly tug on the pipe to conrm the tabs have locked.
It is acceptable to use screws no longer than 1/2 in. (13
mm) to hold outer pipe sections together. If predrilling holes,
DO NOT penetrate inner pipe.
For 90º and 45º elbows that are changing the vent direction
from horizontal to vertical, one screw minimum should be put
in the outer ue at the horizontal elbow joint to prevent the
elbow from rotating. Use screws no longer than 1/2 in. (13
mm). If predrilling screw holes, DO NOT penetrate inner pipe.
WARNING! Risk of Fire or Explosion! Vent sections
MUST be installed correctly. Improperly installed vent
sections could leak or cause appliance to overheat.
Required: Commercial, Multi-family (Multi-level exceed-
ing two stories), or High-Rise Applications
Recommended: Vent Congurations with ve or more
pipe joints/pipe connections
All outer pipe joints must be sealed using one of the meth-
ods below, including the slip section that connects directly
to the horizontal termination cap.
• Apply a bead of silicone sealant (300 ºF minimum con-
tinuous exposure rating) inside the female outer pipe
joint prior to joining sections. See Figure 7.1 OR
• Apply a bead of silicone sealant (300 ºF minimum con-
tinuous exposure rating) to the outside of connecting
joint after joining sections OR
Apply aluminum foil tape (300 ºF minimum continuous
exposure rating) to the outside of connecting joint after
joining sections. On horizontal pipe runs, it is recom-
mended that the tape seam is positioned on the bottom
side of the vent pipe.
• Only outer pipes need to be sealed. All unit collar, pipe,
slip section, elbow and cap outer ues shall be sealed
in this manner, unless otherwise stated.
Figure 7.2
A
B
Figure 7.3
LancesLances
Figure 7.1 High Temperature Silicone Sealant
WARNING! Risk of Fire or Explosion! DO NOT break
silicone seals on slip sections. Use care when remov-
ing termination cap from slip pipe. If slip section seals
are broken during removal of the termination cap, vent
could leak.
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
46
Figure 7.4 Seams
Note: Make sure that the seams are not aligned to prevent
unintentional disconnection.
INCORRECT
CORRECT
NOTICE: When installing a vent system with an HRC
termination cap, all pipe system joints shall be sealed
using a high temperature silicone sealant (300 ºF minimum
continuous exposure rating).
• Apply a bead of silicone sealant (300 ºF minimum
continuous exposure rating) inside the female outer pipe
joint prior to joining sections.
• Only outer pipes are sealed, sealing the inner ue is not
required.
• All unit collar, pipe, slip section, elbow and cap outer
ues shall be sealed.
To attach the rst vent component to the starting collars
of the appliance:
• Attach a DVP-SLP24 or DVP-2SL adapter to the starting
collar of the appliance.
• Lock the vent components into place by sliding the pipe
section onto the collar.
• Align the seam of the pipe and seam of collar to allow
engagement. Rotate the vent component to lock into
place. Use this procedure for all vent components. See
Figure 7.5.
• Slide the gasket over the rst vent section and place it
ush to the appliance. This will prevent cold air inltration.
Caulk with a minimum of 300 ºF continuous exposure
rating may be used to hold the part in place.
• Continue adding vent components, locking each
succeeding component into place.
• Ensure that each succeeding vent component is securely
tted and locked into the preceding component.
It is acceptable to use screws no longer than 1/2 in. (13
mm) to hold outer pipe sections together. If predrilling holes,
DO NOT penetrate inner pipe.
WARNING! Risk of Fire or Explosion! Vent sections
MUST be installed correctly. Improperly installed vent
sections could leak or cause appliance to overheat.
Assemble Vent Sections (SLP Only)
Required: Commercial, Multi-family (Multi-level exceed-
ing two stories), or High-Rise Applications
Recommended: Vent Congurations with ve or more
pipe joints/pipe connections
All outer pipe joints must be sealed using one of the
methods below, including the slip section that connects
directly to the horizontal termination cap.
• Apply a bead of silicone sealant (300 ºF minimum
continuous exposure rating) inside the female outer
pipe joint prior to joining sections. See Figure 7.1 OR
• Apply a bead of silicone sealant (300 ºF minimum
continuous exposure rating) to the outside of
connecting joint after joining sections OR
Apply aluminum foil tape (300 ºF minimum continuous
exposure rating) to the outside of connecting joint
after joining sections. On horizontal pipe runs, it is
recommended that the tape seam is positioned on the
bottom side of the vent pipe.
• Only outer pipes need to be sealed. All unit collar, pipe,
slip section, elbow and cap outer ues shall be sealed
in this manner, unless otherwise stated.
WARNING! Risk of Fire or Explosion! DO NOT break
silicone seals on slip sections. Use care when remov-
ing termination cap from slip pipe. If slip section seals
are broken during removal of the termination cap, vent
could leak.
47
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
Figure 7.5 Adding Venting Components
WARNING! Risk of Fire or Explosion! DO NOT break
silicone seals on slip sections. Use care when remov-
ing termination cap from slip pipe. If slip section seals
are broken during removal of the termination cap, vent
could leak.
Note: Align seams to engage pipe,
then rotate counterclockwise to lock
NOTICE: When installing a vent system with an HRC
termination cap, all pipe system joints shall be sealed
using a high temperature silicone sealant (300 ºF minimum
continuous exposure rating).
• Apply a bead of silicone sealant (300 ºF minimum
continuous exposure rating) inside the female outer pipe
joint prior to joining sections.
• Only outer pipes are sealed, sealing the inner ue is not
required.
• All unit collar, pipe, slip section, elbow and cap outer
ues shall be sealed.
B. Assemble Slip Sections
• Slide the inner ue of the slip section into the inner ue
of the pipe section and the outer ue of the slip section
over the outer ue of the pipe section. See Figure 7.6.
• Slide together to the desired length.
Figure 7.6 Slip Section Pilot Holes
Figure 7.7 Screws into Slip Section
Pilot holePilot hole
• Continue adding pipe as necessary following instructions
in “Assembling Pipe Sections.”
NOTICE: If slip section is too long, the inner and outer
ues of the slip section can be cut to the desired length.
• Maintain a 1-1/2 in. (38 mm) overlap between the slip
section and the pipe section.
• Secure the pipe and slip section with two screws no
longer than 1/2 in. (13 mm), using the pilot holes in the
slip section. See Figure 7.7.
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
48
120º
Figure 7.8 Securing Vertical Pipe Sections
120º
Figure 7.9 Securing Horizontal Pipe Sections
D. Disassemble Vent Sections
• Rotate either section (see Figure 7.10) so the seams on
both pipe sections are aligned as shown in Figure 7.11.
• Pull carefully to separate the pieces of pipe.
Figure 7.11 Align and Disassemble Vent Sections
Figure 7.10 Rotate Seams for Disassembly
C. Secure the Vent Sections
WARNING! Risk of Fire, Explosion or Asphyxiation!
Improper support could allow vent to sag and separate.
Use vent run supports and connect vent sections per in-
stallation instructions. DO NOT allow vent to sag below
connection point to appliance.
• Vertical runs originating o the top of the appliance, with
no osets, must be supported every 8 feet (2.44 m) after
the maximum allowed 25 feet (7.62 m) of unsupported
rise.
• Vertical runs originating o the rear of the appliance, or
after any elbow, must be supported every 8 feet (2.44
m).
• Horizontal runs must be supported every 5 feet (1.52 m).
• Vent supports or plumbers strap (spaced 120º apart)
may be used to support vent sections. See Figures 7.8
and 7.9.
Note: Figures 7.8 and 7.9 are to be used for reference
only. Method of strap installation could vary by
conguration of vent system.
• Wall shield restops may be used to provide horizontal
support to vent sections.
• SLP ceiling restops have tabs that may be used to
provide vertical support.
49
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
E. Vertical Termination Requirements
Install and Seal Metal Roof Flashing
• See minimum vent heights for various pitched roofs
(Section 4, Figure 4.1) to determine the length of pipe
to extend through the roof.
• Slide the roof ashing over the pipe sections extending
through the roof as shown in Figure 7.12.
• Use an elastomeric or silicone sealant with a minimum of
150 ºF temperature rating to seal the metal roof ashing.
Figure 7.13 Insert Bolt into BracketsFigure 7.13 Insert Bolt into Brackets
NOTICE: Failure to properly seal the roof ashing and pipe
seams could permit entry of water.
• Seal the gap between the roof ashing and the outside
diameter of the pipe.
• Seal the perimeter of the ashing where it contacts the
roof surface. See Figure 7.12.
• Seal the exposed pipe section seams that are located
above the roof.
SEAL
Figure 7.12 Figure 7.12
Assemble and Install Storm Collar
CAUTION! Risk of Cuts, Abrasions or Flying Debris.
Wear protective gloves and safety glasses during instal-
lation. Sheet metal edges are sharp.
• Slide the storm collar onto the exposed pipe section
and align brackets.
• Insert a bolt (provided) through the brackets and install
nut. Do not completely tighten.
• Slide the assembled storm collar down the pipe section
until it rests on the roof ashing. See Figure 7.13.
• Tighten nut and make sure the collar is tight against the
pipe section.
• Seal around the top of the storm collar. See Figure 7.14.
Note: When installing a silicone or EPDM pipe ashing boot
on a metal roof, it is recommended to put a bead of 100%
silicone sealant where the boot contacts the vent pipe to
prevent the entry of water. Follow the manufacturer’s recom-
mendations when installing the boot.
TERMINATION CAP
(1 OF 3)
SCREWS
SEAL
STORM
COLLAR
Install Vertical Termination Cap
• Attach the vertical termination cap by sliding the inner
collar of the cap into the inner ue of the pipe section
while placing the outer collar of the cap over the outer
ue of the pipe section.
• Secure the cap by driving three self-tapping screws
(supplied) through the pilot holes in the outer collar of
the cap into the outer ue of the pipe. See Figure 7.14.
Figure 7.14 Figure 7.14
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
50
Important Notice: Heat shields may not be eld constructed.
F. Horizontal Termination Requirements
Heat Shield Requirements for Horizontal
Termination
WARNING! Risk of Fire! To prevent overheating and re,
heat shields must extend through the entire wall thick-
ness.
• DO NOT remove the heat shields attached to the
wall shield restop and the horizontal termination cap
(shown in Figure 7.15).
• Heat shields must overlap 1-1/2 in. (38 mm) mini-
mum.
There are two sections of the heat shield. One section
is factory-attached to the wall shield restop. The other
section is factory-attached to the cap. See Figure 7.15.
If the wall thickness does not allow the required 1-1/2 in.
(38 mm) heat shield overlap when installed, an extended
heat shield must be used.
• If the wall thickness is less than 4 in./102 mm (DVP)
or 4-3/8 in./ 111 mm (SLP), the heat shields on the cap
and wall shield restop must be trimmed. A minimum
1-1/2 in. (38 mm) overlap MUST be maintained.
• Use an extended heat shield if the nished wall thickness
is greater than 7-1/4 in. (184 mm).
• The extended heat shield may need to be cut to length
maintaining sucient length for a 1-1/2 in. (38 mm)
overlap between heat shields.
• Attach the extended heat shield to either of the
existing heat shields using the screws supplied with
the extended heat shield. Refer to Vent Components
document included in manual bag.
• Rest the small leg on the extended heat shield on top
of the pipe section to properly space it from the pipe
section.
Note: When using termination caps with factory-supplied
heat shield attached, no additional wall shield restop is
required on the exterior side of a combustible wall.
Install Horizontal Termination Cap (DVP and
SLP Pipe)
WARNING! Risk of Fire! The telescoping ue section of
the termination cap MUST be used when connecting vent.
• 1-1/2 (38 mm) minimum overlap of ue telescoping
section is required.
Failure to maintain overlap could cause overheating and
re.
• Vent termination must not be recessed in the wall. Siding
may be brought to the edge of the cap base.
• Flash and seal as appropriate for siding material at
outside edges of cap.
• When installing a horizontal termination cap, follow
the cap location guidelines as prescribed by current
ANSI Z223.1 and CAN/CGA-B149 installation codes
and refer to Section 4 of this manual.
CAUTION! Risk of Burns! Local codes may require in-
stallation of a cap shield to prevent anything or anyone
from touching the hot cap.
NOTICE: For certain exposures which require superior
resistance to wind-driven rain penetration, a ashing kit
and HRC caps are available. When penetrating a brick
wall, a brick extension kit is available for framing the brick.
INTERIOR
HEAT SHIELD OR
EXTENDED
HEAT SHIELD
WALL SHIELD
FIRESTOP
HEAT SHIELD
1-1/2 IN. (38 MM) MIN.
OVERLAP
SHEATHING
SLIP SECTION
CAN BE EXTENDED
INNER VENT
OUTER VENT
EXTERIOR
Figure 7.15 Venting Through the Wall
DVP-TRAP1 Exception
See Section 3.C for termination cap exception (DVP-
TRAP1 or equivalent) for top vent, horizontally terminated
installation.
51
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
A. General Information
WARNING! Risk of Shock! DO NOT wire 110-120 VAC
to the ignition module or to the appliance wall switch.
Incorrect wiring will damage controls.
NOTICE: This appliance must be electrically wired
and grounded in accordance with local codes or, in the
absence of local codes, with National Electric Code
ANSI/NFPA 70-latest edition or the Canadian Electric
Code CSA C22.1.
• Wire the appliance circuit using a minimum 14-2 AWG
with ground to unswitched 110-120 VAC. This is required
for proper operation of the appliance.
• A 110-120 VAC circuit for this product must be protected
with ground-fault circuit interrupter protection, in
compliance with the applicable electrical codes, when
it is installed in locations such as in bathrooms or near
sinks.
• Low voltage and 110-120 VAC voltage cannot be shared
within the same wall box.
• In some instances, the spark ignition of the replace may
cause intermittent, non-damaging, interference during
the lighting sequence with a TV plugged into the same
circuit. It is recommended that the replace and TV use
dierent circuits to mitigate the interference potential.
If interference is occurring on the same circuit, the use
of surge protectors may help alleviate the interference.
8 8
Electrical Information
INSIDE OF APPLIANCE
JUNCTION BOX BRACKET
OUTSIDE OF APPLIANCE
Accessories Requirements
• This appliance may be used with a wall switch, wall
mounted thermostat and/or a remote control.
Wiring for optional Hearth & Home Technologies approved
accessories should be done now to avoid reconstruction.
Follow instructions that come with those accessories.
Junction Box Wiring
If the box is being wired from the INSIDE of the appliance:
• Remove the screw attaching the junction box/receptacle
to the outer shell, rotate the junction box inward to disen-
gage it from the outer shell. See Figure 8.1 and Figure
8.2.
• Pull the electrical wires from outside the appliance through
the opening into the valve compartment and secure wires
with a Romex connector. See Figure 8.1.
• Make all necessary wire connections to the junction box/
receptacle and reattach the junction box/receptacle to
the outer shell.
Electrical Service and Repair
WARNING! Risk of Shock! Label all wires prior to
disconnection when servicing controls. Wiring errors
could cause improper and dangerous operation. Verify
proper operation after servicing.
WARNING! Risk of Shock! Replace damaged wire with
type 105º C rated wire. Wire must have high temperature
insulation.
Figure 8.2 Junction Box Detail
NOTICE: DO NOT wire
110-120 VAC to wall switch.
Figure 8.1 Junction Box Detail (Generic Fireplace Shown)
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
52
Figure 8.3 Electrical Component Tray
Component Tray
The electrical components are installed on the compo-
nent tray, noted in Figure 8.3. The components may be
removed if necessary. Once components are reinstalled,
ensure the electrical components are connected properly.
To remove the IFT-ECM, gently pull up on the ECM, lifting
it enough to clear the tabs (A) and disengage from tab B.
A
B
NOTICE: Verify proper wire managment prior to opera-
tion of the appliance. Component damage could occur.
• Verify electrical wire connections.
• Ensure wires DO NOT contact rebox.
Wire Management
Proper wire management is required for proper operation
of the appliance. Component damage could occur if elec-
trical cords and/or wires contact the rebox. Ensure wires
are not contacting the rebox.
53
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
Figure 8.4 IntelliFire
Touch
®
Wiring Diagram
IntelliFire Touch
®
Ignition System Wiring
NOTICE: Batteries should only be used as a power source
in the event of an emergency power outage. Batteries
should not be used as a primary long-term power source.
Battery polarity must be correct when installing batteries.
When using batteries as a power source, the 6-volt
transformer must be unplugged from the receptacle.
Do not store batteries in the battery pack when the
appliance is powered by the 6 volt transformer connected
to permanent electrical service.
• Wire the appliance junction box to 110-120 VAC for
proper operation of the appliance.
WARNING! Risk of Shock or Explosion! DO NOT wire
IPI controlled appliance junction box to a switched circuit.
Incorrect wiring will override IPI safety lockout.
• Refer to Figure 8.4, IntelliFire Touch Wiring Diagram.
• This appliance is equipped with an IntelliFire Touch
control valve which operates on a 6 volt/1.5 AMP system.
• Plug the 6 volt transformer plug into the appliance junction
box to supply power to the unit OR install 4 AA cell
batteries (not included) into the battery pack before use.
B. Wiring Requirements
FLAME
SENSE
IGNITER
TO JUNCTION
BOX 110-120 VAC
(OPTIONAL) RF MODULE
2326-120
IFT-RC400
REMOTE
CONTROL
IFT-RC150
WIRELESS
WALL SWITCH
(OPTIONAL)
3 PRONG 110VAC
FAN
6 VAC
TRANSFORMER
JUNCTION BOX
110-120 VAC
2326-013
IFT-WFM
WIFI MODULE
(OPTIONAL
IFT-ECM MODULE
2326-130
(OPTIONAL)
IFT-ACM MODULE
2326-150
GFK-160A FAN
(OPTIONAL)
IFT-ECM MODULE
2326-130
ORANGE
(PILOT)
(OPTIONAL)
6V DC
BATTERY PACK
2326-142
BLK
RED
JUMPER WIRE
2187-198
APPLIANCE
ON/OFF
CONTROL
BLK
USB-C WIRE
HARNESS
2326-222
BRN
BLK
RED
BLK
RED
GRN
(VALVE)
BLK
(GROUND)
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
54
C. Fan Installation
If appliance is not installed, fan installation should be per-
formed by a qualied service technician.
Option 1 (Prior to installation of appliance):
• Remove the screws on the fan access plate on the
back of the appliance. See Figure 8.5.
• Remove fan access plate and install fan through the
fan access cavity.
• Install and wire the fan per instruction shipped with the
fan.
• Reinstall the fan access plate back on the appliance.
Option 2:
• Remove decorative barrier front, glass, logs, base pan
assembly, burner assembly and valve plate assembly.
• Install fan through the valve plate cavity. See Figure
8.6.
• Install and wire the fan per instruction shipped with the
fan. Figure 8.4 also shows additional details.
• Reinstall valve plate assembly, burner assembly,
basepan assembly, logs, appliance glass and decora-
tive barrier front.
REMOVE FAN ACCESS PLATE
(SCREWS)
D. Service for Fan
FAN INSTALLED
Figure 8.5 Remove Fan Access Plate
Figure 8.6 Fan Installed in Valve Plate Cavity
If appliance is already installed, service should be per-
formed by a qualied service technician.
• Remove decorative barrier front, glass, logs, base pan
assembly, burner assembly and valve plate assembly.
• Service can be performed through the valve plate cav-
ity. See Figure 8.6.
• Reinstall valve plate assembly, burner assembly,
base pan assembly, logs, appliance glass and decora-
tive barrier front.
55
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
A. Fuel Conversion
• Make sure the appliance is compatible with available gas
types.
• Conversions must be made by a qualified service
technician using Hearth & Home Technologies specied
and approved parts.
B. Gas Pressure
C. Gas Connection
• Refer to Section 3 for location of gas line access in
appliance.
• The bottom surround for this appliance may be removed
to gain access to the control cavity for ease of access
during the gas connection process. See Figure 9.1 and
Figure 9.3.
• Gas line may be run through knockout(s) provided.
• The gap between supply piping and gas access hole
may be sealed with caulk or aluminum foil tape with a
minimum of 300 ºF continuous exposure rating or stued
with non-combustible, unfaced insulation to prevent cold
air inltration.
• Ensure that gas line does not come in contact with outer
wrap of the appliance. Follow local codes.
• Pipe incoming gas line into valve compartment.
• Connect incoming gas line to the 1/2 in. (13 mm) NPT
connection on manual shuto valve.
WARNING! Risk of Fire or Explosion! Support control
when attaching pipe to prevent bending gas line.
WARNING! Risk of Fire or Explosion! Gas build-up
during line purge could ignite.
• A small amount of air will be in the gas supply lines.
• Ensure adequate ventilation.
• Ensure there are no ignition sources such as sparks or
open ames.
Light the appliance. It will take a short time for air to purge
from lines. When purging is complete the appliance will
light and operate normally.
WARNING! Risk of Fire, Explosion or Asphyxiation!
Check all ttings and connections with a non-corrosive
commercially available leak-check solution. DO NOT use
open ame. Fittings and connections could have loos-
ened during shipping and handling.
• Elongated pressure taps are recommended for gas
pressure testing on these models.
• Verify inlet pressures. Verify minimum pressures when
other household gas appliances are operating.
• Install regulator upstream of valve if line pressure is
greater than 1/2 psig.
9 9
Gas Information
Gas Pressure Natural Gas Propane
Minimum inlet pressure 5.0 in. w.c. 11.0 in. w.c.
Maximum inlet pressure 10.0 in. w.c. 13.0 in. w.c.
Manifold pressure 3.5 in. w.c. 10.0 in. w.c.
Note: Have the gas supply line installed in accordance with
local codes, if any. If not, follow ANSI Z223.1. Installation
should be done by a qualied installer approved and/or
licensed as required by the locality. (In the Commonwealth
of Massachusetts installation must be performed by a
licensed plumber or gas tter).
Note: A listed (and Commonwealth of Massachusetts ap-
proved) 1/2 in. (13 mm) T-handle manual shut-o valve
and exible gas connector are connected to the 1/2 in. (13
mm) control valve inlet.
• If substituting for these components, please consult
local codes for compliance.
• Optimum appliance performance requires proper input
pressures.
• Gas line sizing requirements will be determined in ANSI
Z223.1 National Fuel Gas Code in the USA and CAN/
CGA B149 in Canada.
• Pressure requirements when in operation are:
Figure 9.1 Bottom Surround Removal (Generic Fireplace Shown)
GAS CONNECTION
AND SERVICE ACCESS
BOTTOM SURROUND
Fire Risk.
Risk of Fire! Risk of Explosion!
High pressure will damage valve.
• Isolate gas supply piping BEFORE pressure
testing gas line.
• Close the manual shuto valve BEFORE
pressure testing gas line.
WARNING
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
56
D. High Altitude Installations
NOTICE: If the heating value of the gas has been reduced,
these rules do not apply. Check with your local gas utility
or authorities having jurisdiction.
When installing above 2000 feet elevation:
• In the USA: Reduce input rate 4% for each 1000 feet
above 2000 feet.
• In CANADA: Input ratings are certied without a
reduction of input rate for elevations up to 4500 feet
(1370 m)above sea level. Please consult provincial and/
or local authorities having jurisdiction for installations at
elevations above 4500 feet (1370 m).
Check with your local gas utility to determine proper
orice size.
E. Air Shutter Setting
WARNING! Risk of Explosion or Delayed Ignition!
Improperly adjusted air shutter could cause soot buildup.
CAUTION! Risk of Burns! Components are HOT! Wear
protective gloves when adjusting shutter.
NOTICE: If sooting occurs, provide more air by opening
the air shutter.
Air shutter settings should be adjusted by a qualied ser-
vice technician at the time of installation. The air shutter
is set at the factory for a typical minimum vent run which
consists of enough horizontal vent pipe to terminate
through a 2x6 wall:
Top Vented with the required six inch minimum vertical,
one 90 degree elbow and DVP-TRAP2 termination cap
It may need to be adjusted for other venting
scenarios. Adjust air shutter for dierent vent runs. See
Figure 9.2.
• Loosen the wing nut.
• Move the air handle to the right to open the air shutter.
• Move the air handle to the left to close the air shutter.
• Tighten the wing nut.
Shutter Setting Verication / Flame Appearance
• After 15 minutes, the ames will be a yellow/blue mix.
The front ames may be blue at this time.
• After 30 minutes, the ames should be yellow with
some blue ames near the burner ports.
• After 1 hour, the ame will be at its maximum maturity.
NOTICE: Flames should not appear orange or stretch
to the top refractory/ top of rebox. If ames are dark
orange with dark, smoky tips, provide more primary air to
the burner by opening the air shutter accordingly.
Figure 9.2 Air Shutter (Generic Fireplace Shown)
AIR SHUTTER WING NUT
Air Shutter Settings
(Factory Set to Minimum Vent Runs)
MODEL GAS TYPE MINIMUM VENT
RUN
MER36MN NG 3/4 IN.
MER42MN NG 3/4 IN.
Burner Identication
Figure 9.3 illustrates the identication pattern of the
burner. This can be found on the underside of the burner
along an edge.
Figure 9.3 Burner Identication
MER36MN
MER42MN
57
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
Figure 9.4 Gas Valve Access (Generic Fireplace Shown)
F. Service/Replace Appliance Gas Valve
FULL VALVE
ACCESS
VALVE PLATE ASSEMBLY
TO REMOVE BOTTOM
SURROUND:
FLATTEN TABS
PUSH BACK AND OUT
TABS
• Remove decorative barrier front, glass, logs, base
pan assembly, burner assembly and valve plate as-
sembly. See Figure 9.4.
• Perform service or replace gas valve.
WARNING! Risk of Fire or Explosion! Turn o gas to
appliance before removing components. Support gas
line to prevent bending.
WARNING! Risk of Fire, Explosion or Asphyxiation!
Check all ttings and connections with a non-corrosive
commercially available leak-check solution. DO NOT use
open ame. Fittings and connections could have loos-
ened during removal of valve plate assembly.
• Reinstall valve plate assembly, burner assembly,
basepan assembly, logs and appliance glass and
front.
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
58
10 10
Finishing
HIGH TEMPERATURE (300 ºF/ 149 ºC MIN.)
TOP AND SIDE SEAL JOINT
REMOVABLE SURROUND (SHADED AREA)
MAY BE COVERED WITH COMBUSTIBLE
OR NON-COMBUSTIBLE MATERIAL
FACING MATERIAL UP TO 1/2 IN. THICK
MAY BE COMBUSTIBLE - TOP AND SIDES
0 IN.
0 IN.
1-1/8 IN.
0 IN.
FACTORY-INSTALLED NON-COMBUSTIBLE BOARD
DO NOT REMOVE
B
A
FACTORY-INSTALLED
NON-COMBUSTIBLE BOARD
DRYWALL OR
WALL SHEATHING
MATERIAL
NON-COMBUSTIBLE
FINISHING MATERIAL
NO GAP ALLOWED
A B
MER36MN
inches 40-7/8 41
millimeters 1038 1041
MER42MN
inches 42-7/8 48
millimeters 1089 1219
A. Facing Material
Figure 10.2 Non-combustible Facing Diagram
NOTICE: Surface temperatures around the appliance
will become warm while the appliance is in operation.
Ensure nishing materials used for all surfaces (oor, walls,
mantels, etc.) will withstand temperatures up to 190°F.
Risk of Fire!
DO NOT apply combustible materials beyond the min-
imum clearances. Comply with all minimum clearanc-
es to combustibles as specied in this manual. Ma-
terials overlapping into non-combustible zones could
ignite and will interfere with air ow through decorative
barrier fronts.
• Metal front of appliance may be covered with non-
combustible materials only.
• Facing and/or nishing materials must not interfere
with air ow through decorative barrier fronts, removal
of decorative barrier fronts or access for service.
• Facing and/or finishing materials must never
overhang into the glass opening.
• Observe all clearances when applying combustible
materials.
• Seal gaps between the nished wall and appliance
top and sides using a 300 ºF minimum sealant. Refer
to Figure 10.1 and Figure 10.2.
• Finishing materials must be installed with no gaps
in order to prevent the escape of heat between the
nishing material and the wall. See Figure 10.1.
WARNING
WARNING! Risk of Overheating! DO NOT allow gap
between nishing materials and front of appliance.
Figure 10.1 Finishing Material Installed
WARNING! Risk of Overheating! DO NOT install
combustible or non-combustible ooring or hearth
material above top of bottom surround. Gap be-
tween bottom of decorative front and top of bottom
surround must be maintained for proper air ow.
Figure 10.3 Required Air Flow Gap
Flooring & Hearth Material (1-1/8 IN. MAX.)
FLOORING OR HEARTH MATERIAL
NOT ALLOWED
ABOVE TOP OF BOTTOM SURROUND
REQUIRED AIR FLOW GAP
DECORATIVE BARRIER FRONT
59
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
Introduction
If the desired nished replace installation does not utilize
non-combustible nishing materials (such as tile, marble,
stone, etc.), special attention must be paid to the instal-
lation of drywall/gypsum wallboard to minimize potential
development of cracking and paint discoloration. Hearth
and Home Technologies has tested the following methods
and materials and therefore recommends the following
steps for the best drywall performance.
• Refer to section 6.D for more information regarding the
included non-combustible board.
• The appliance ships with the required non-combusti-
ble board.
• To ensure good adhesion of drywall compounds and
tape, thoroughly clean the non-combustible board and
surrounding drywall to remove dust. The non-com-
bustible board may be primed with a high-quality PVA
primer.
B. Drywall Installation
Filling and Finishing Seams
1. Step 1: Fill all gaps and joints between the non-
combustible board pieces and the drywall with a
general purpose chemically setting joint compound
such as Durabond® 45 Joint Compound manufactured
by USG (Sheetrock® brand), recommended by Hearth
& Home Technologies. Use a drywall knife to rmly
press the joint compound into all gaps. See Figure
10.1. Allow these joints to dry.
2. Step 2: All joints are to be taped with berglass mesh
tape 1 7/8” minimum width, and embedded with
Setting-Type joint compound, such as with Durabond®
Joint Compound manufactured by USG (Sheetrock®
brand), or equivalent. Allow these joints to dry.
3. Step 3: Depending on the technique used in steps
1 and 2, two to three nishing coats are required to
provide a smooth and durable nish. Hearth and
Home Technologies recommends a lightweight or all-
purpose compound. Allow each coat to properly cure.
Allow the nishing coat(s) to cure for 24 hours before
operating appliance.
Painting
If desired nishing includes a painted wall, a high-quality
100% acrylic latex paint with a high-quality latex primer
base coat are recommended around the appliance to limit
discoloration. Oil-based or standard acrylic paints may
be more prone to discoloration due to heat exposure.
Drywall Joint-Crack Prevention and Repair
Drywall joints around the replace will be aected by ex-
posure to elevated temperatures, along with other envi-
ronmental, structural factors due to new construction, and
methods used to install and nish the drywall. If a crack
does emerge adjacent to the replace, it can be perma-
nently repaired by lling it with a paintable latex caulk,
followed by repainting.
Some movement of the screws used to secure the non-
combustible board to the appliance/surround framing is
expected. If a blemish begins to show over a screw head,
sand the surface to remove the blemish and repaint.
NOTICE: Hearth & Home Technologies recommends
using multiple pieces of decorative nish material around
the opening of the appliance to reduce the chances of
the material cracking. A single piece of decorative nish
material (such as marble or granite) is more susceptible
to cracking due to uneven heating and cooling which
causes temperature dierentials within the material itself.
The use of multiple pieces will reduce the temperature
dierentials in each piece and reduce the likelihood of
cracks. In addition to using multiple pieces of decorative
nish material, the installation of the Passive Heat optional
heat management system will also reduce the chances of
cracking.
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
60
If installing a television (TV) above the appliance, see
Section 2.B.
C. Installing a Television
Figure 10.4 Minimum Vertical and Maximum Horizontal
Dimensions of Combustibles or Painted Surfaces
5
10
11
12
2-1/2
13
14
15
16
17
18
19
32
TO CEILING
9
10
11
12
8
7
6
5
4
3
25
18
Measurement from fireplace
opening to bottom of appliance:
= 33-1/2 IN. (MER36MN)
= 35-1/2 IN. (MER42MN)
Note:
All measurements
in inches.
Note: Measurement is taken from top of the opening,
Combustible Mantels
Combustible Mantels - Passive Heat Installed
Figure 10.5 Minimum Vertical and Maximum Horizontal
Dimensions of Combustibles - Passive Heat Kit
Installed
6
12
Measurement from fireplace
opening to bottom of appliance:
= 33-1/2 IN. (MER36MN)
= 35-1/2 IN. (MER42MN)
Note:
All measurements
in inches.
Note: Measurement is taken from top of the opening,
NOT the top of the fireplace.
5
2-1/2
13
14
15
16
17
18
11
12
50
TO CEILING
7
8
9
10
D. Mantel and Wall Projections
WARNING! Risk of Fire! Comply with all minimum clear-
ances as specied. Mantel MUST be fastened to wall
with no gaps.
• Framing closer than the minimums listed must be
constructed entirely of non-combustible materials (i.e.,
steel studs, concrete board, etc.).
• No gaps allowed between the wall and the bottom of the
mantel.
• Combustible mantel legs and wall projections may be
applied over the non-combustible board supplied with
the appliance. Follow guidelines as shown in the gures
below for mantels, mantel legs and wall projections.
• Measurement is taken from top/side of the opening, NOT
the top/side of the appliance.
Mantel requirements are shown in Figures 10.4-10.9.
61
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
Non-Combustible Mantels
Figure 10.6 Minimum Vertical and Maximum Horizontal
Dimensions of Non-Combustibles
6
12
13
14
15
16
17
18
Measurement from fireplace
opening to bottom of appliance:
= 33-1/2 IN. (MER36MN)
= 35-1/2 IN. (MER42MN)
Note: Measurement is taken from top of the opening,
7
8
9
10
11
12
6
50
TO CEILING
Note: All
measurements
in inches.
Figure 10.7 Minimum Vertical and Maximum Horizontal
Dimensions of Non-Combustibles - Passive Heat
Kit Installed
14
15
16
17
18
19
32
TO CEILING
9
10
11
12
8
7
6
25
18
Measurement from fireplace
opening to bottom of appliance:
= 33-1/2 IN. (MER36MN)
= 35-1/2 IN. (MER42MN)
Note: All
measurements
in inches.
Note: Measurement is taken from top of the opening,
Non-Combustible Mantels - Passive Heat Installed
Figure 10.8 Combustible Mantel Leg or Wall Projections
(Acceptable on both sides of opening)
A
B
INTERIOR WALL
TOP VIEW
MANTEL LEG OR WALL PROJECTIONS
FIREPLACE OPENING
Combustible Mantel Legs or Wall Projections
Figure 10.9 Non-Combustible Mantel Leg or Wall Projections
(Acceptable on both sides of opening)
Non-Combustible Mantel Legs or Wall Projections
A
B
INTERIOR WALL
TOP VIEW
MANTEL LEG OR WALL PROJECTIONS
FIREPLACE OPENING
6 IN.
If A minimum is ____, then B maximum is_____.
A
Inches
1-5/16 2-5/16 3-5/16 4-5/16 5-5/16 6-5/16
Millimeters
33 59 84 110 135 160
B
Inches
1 2 3 4 5
∞
Millimeters
25 51 76 102 127
∞
If A minimum is ____, then B maximum is_____.
A
Inches
0-6-5/16 6-5/16
Millimeters
0-160 160
B
Inches
6
∞
Millimeters
152
∞
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
62
Figure 10.10 Finishing Material installed with Passive Heat Optional Heat Management System
Finishing Material Installed with Passive Heat Optional Heat Management System
2 IN. MIN.*
DO NOT INSTALL
FINISHING MATERIAL
ON THIS SURFACE.
2 IN. (51 mm) MIN.
OPENING MUST
NOT BE BLOCKED
CEILING
CEILING
2 IN. MIN.*
DO NOT INSTALL
FINISHING MATERIAL
ON THIS SURFACE.
2 IN. (51 mm) MIN.
OPENING MUST NOT
BE BLOCKED
CEILING
SIDE DISCHARGE
(DISCHARGE SLOTS ON BOTH SIDES OF APPLIANCE)
FRONT DISCHARGE
OPEN TOP DISCHARGE
= COMBUSTIBLE MATERIAL ALLOWED
* = Mesh screen required for front discharge or open top discharge passive heat installations with
discharge opening of 3 in. (76 mm) or greater.
(51 mm)
(51 mm)
8-3/4 IN.
(222 mm)
12-1/4 IN.
(311 mm)
REGISTER COVER
SLOTS FACE FRONT
OF APPLIANCE
63
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
E. Hearth Extension F. Decorative Barrier Front Dimensions for
Finishing
A hearth extension is not required with these models.
Refer to Section 3 for clearances and information
regarding vinyl ooring restrictions.
1 in. MAX
NON-COMBUSTIBLE
FINISHING MATERIAL
(TOP EDGE)
DECORATIVE BARRIER FRONT
FRONT FACE OF FIREPLACE
Figure 10.12 Overlap Fit Decorative Barrier Front
Finishing materials 1 in. maximum thick.
Stop nishing material ush with opening.
DECORATIVE BARRIER FRONT
NON-COMBUSTIBLE
FINISHING MATERIAL
6 IN. MAXIMUM
THICKNESS
NON-COMBUSTIBLE
FINISHING MATERIAL
6 IN. MAXIMUM
THICKNESS
Figure 10.11 Inside Fit Decorative Barrier Front
Non-Combustible Finishing material between 1 and 6 in. thick.
Only decorative barrier fronts certied for use with this ap-
pliance model may be used. Contact your dealer for a list
of decorative barrier fronts that may be used.
Decorative Barrier Front Fit Types
• Inside Fit as shown in Figure 10.12. Decorative barrier
front ts inside appliance opening.
• Overlap t as shown in Figure 10.13. Decorative bar-
rier front is installed on top of nishing material.
Decorative Barrier Front Finishing Methods
1. Finish material installed up to appliance opening.
A. Finish material 1 inch thick or less: Use with Over-
lap t fronts. Finishing strips not required. See Figure
10.13.
B. Finish material 0-6 inch thick: Use this method with
Inside t fronts. Finishing strips not required. See Fig-
ure 10.14.
2. Finishing strips required. Shipped with appliance. See
Figure 10.16.
A. Finish material 1-6 inch thick: Use this method with
overlap fronts installed as inside t. See Figure 10.15.
A table showing the t option (Overlap or Inside) for each
available decorative barrier front for this appliance is in-
cluded for each nishing method (1.A, 1.B, 2.A).
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
64
Figure 10.13 Non-Combustible Finishing Material 1 Inch
Thick or Less - Overlap Fit Fronts
DECORATIVE
BARRIER FRONT
1 in. MAX.
NON-COMBUSTIBLE
FINISHING MATERIAL
(TOP EDGE)
Non-Combustible Finishing materials 1 inch maximum thickness.
Stop nishing material ush with appliance opening.
NON-COMBUSTIBLE
FINISHING MATERIAL
1. A Overlap Fit Method with Overlap Fit Front
FINISHING STRIPS NOT REQUIRED
Non-combustible Finishing Material Thickness:
1 Inch Thick or Less
Figure 10.14 Inside Fit Method
NON-COMBUSTIBLE
FINISHING MATERIAL
DECORATIVE FRONT
NON-COMBUSTIBLE
FINISHING MATERIAL
NON-COMBUSTIBLE
FINISHING MATERIAL
1. B Inside Fit Method with Inside Fit Front
FINISHING STRIPS NOT REQUIRED
Non-Combustible Finishing Material Thickness:
0-6 Inches Maximum
Non-Combustible Finishing materials 6 inches maximum thickness.
Stop nishing material ush with appliance opening.
DECORATIVE
BARRIER FRONT
FIT
OPTION
ESSENCE Inside
DECORATIVE
BARRIER FRONT
FIT
OPTION
MANOR Overlap
ENSEMBLE Overlap
VENTURA Overlap
65
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
DECORATIVE FRONT
NON-COMBUSTIBLE
FINISHING MATERIAL
NON-COMBUSTIBLE
FINISHING MATERIAL
Figure 10.15 Non-Combustible Finishing Material Thickness
Greater Than One Inch - Finishing Strips Required
2.A Inside Fit Method with Overlap Fit Front
FINISHING STRIPS REQUIRED
Non-Combustible Finishing Material Thickness:
1-6 Inches Maximum
NON-COMBUSTIBLE
FINISHING MATERIAL
FINISHING
STRIPS
FINISHING STRIP
ALIGNMENT DETAIL
FINISHING STRIPS
FINISHING STRIP
ALIGNS WITH HOLES
NOTICE: Remove nishing strips before ring appliance.
Remove glass assembly to access nishing strip screws.
Install and Remove Finishing Strips
1. Align nishing strip with the two pre-drilled holes on
the appliance top and sides as shown in Figure 10.16.
2. Install screws to attach nishing strips.
3. To remove the nishing strips, remove screws.
Finishing strips will add the proper clearances for the
installation of the front.
Figure 10.16 Install Finishing Strips
Finishing strips will add the proper clearances for the
installation of the front.
DECORATIVE
BARRIER FRONT
FIT
OPTION
MANOR Inside
ENSEMBLE Inside
VENTURA Inside
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
66
Measurement from top edge
of opening to bottom of
appliance = 33-1/2 IN. (851 mm)
ROOM CEILING
1-1/2 IN. (2 X 4 FRAMING)
2 IN. MIN.
TV
4 IN. MIN.
(102 mm)
1/2 IN. X 1/2 IN.
WIRE MESH*
* Wire mesh required for front discharge or open top discharge passive heat installations with discharge
opening of three inches or greater.
Good Faith Guidelines for TV Installations
Above a Fireplace with Passive Heat Option
83-1/2 IN. (2121 mm) MIN.
(Appliance may be
installed off of floor)
WIRE MESH*
= PASSIVE HEAT
DISCHARGE OPENING
41 IN. MIN. (1041 mm)
(MINIMUM CLEARANCE TO
DISCHARGE OPENING)
NOTE: The TV installation requirements are the same regardless of whether the Passive Heat kit is installed with a
top discharge, side discharge or open top discharge.
MER36MN: 76 IN. MIN. (1930 mm)
MER42MN 78 IN. MIN. (1981 mm)
(Appliance may be installed
off of floor)
FIREPLACE
OPENING
2 X 4 FRAMING
2 X 4 OR 2 X 6
FRAMING
CHASE CEILING REQUIRED
WITHIN 3 IN. (76 mm) OF TOP
OF OPENING
12 IN. MIN.
**
(305 mm)
** For information on mantel requirements, refer to Section 2.B (Good Faith TV Guidelines for TV Installations)
and Section 10.C (Mantel and Wall Projections). If a fan is installed, a mantel is required to maintain the Good Faith
guidelines for TV installation. See Section 2.B and Section 2.C.
WARNING! Risk of Fire! Wire mesh required on bottom of discharge opening when discharge
opening is greater than 3 inches. Secure wire mesh to top of framing.
Good Faith TV Guidelines
Figure 10.17 Good Faith Guidelines for TV Installations Above a Fireplace with Passive Heat Option
67
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
11 11
Appliance Setup
C. Install Black Glass Refractory
1. Check area behind basepan to ensure it is clear of
media or other objects.
2. The three glass panels are shown in Figure 11.1. Note
that the left and right panels are dierent and not in-
terchangeable. Panels are reversible. Choose black
reective or matte nish side for installation.
3. Install back panel by placing it in position at back of
rebox. Hold panel in place and install glass retainer
with one self-tapping screw. Hold glass panel in place
until glass retainer is securely holding glass panel.
4. Install left and right side panels using same method.
5. Clean glass as instructed in appliance Owner’s manual.
Figure 11.1 Black Glass Refractory Components
LEFT REAR RIGHT
GLASS RETAINERS
Enlarged to show detail
Included in manual bag
Figure 11.2 Glass Retainer in Position
GLASS RETAINERS
A. Remove the Shipping Materials
WARNING! Risk of Fire! Close the ball valve before in-
stalling the splatter guard to prevent accidental lighting.
Remove the splatter guard before lighting the appliance.
Remove shipping materials from inside or underneath the
rebox.
• Finishing strips are also shipped with this appliance.
Remove from shipping location. Do not discard. De-
pending on the decorative barrier front and nishing
method chosen, nishing strips may be required. See
Section 10.E.
• The splatter guard is a piece of corrugated material
used to protect the appliance during the installation
process before nishing work on the whole hearth
is complete. Splatter guards are factory installed on
these models. Splatter guards must be removed
before appliance is red.
B. Clean the Appliance
Clean/vacuum any sawdust that may have accumu-
lated inside the rebox or underneath in the control
cavity.
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
68
D. Install Driftwood Logs (Optional)
Log Set Assembly: LOGS-KMOD
Models: 6KMOD, 8KMOD, MER36MN, MER42MN
LOG PLACEMENT INSTRUCTIONS
Figure 2 Locations for Log Pins
Figure 2
CAUTION: Logs are fragile, handle with care.
NOTICE: To simplify the installation process, positively
identify each individual log before beginning installation.
See Figure 1.
Leave this manual with party responsible for use
and operation.
Log #1: Place Log #1 using the #4 and #6 log pins as guides as shown in Figure 4. The left end of the log will align with
the burner screw as shown in the top view illustrated in Figure 5.
4422 665511 33 77 88
Figure 3 Log Pins Installed (6KMOD / MER36MN Base Pan Shown)
Installation
1. Fill round holes with included log pins as indicated in
Figure 2. Discard remaining log pins. Figure 3 shows
the log pins in the round holes.
Figure 4 Place Log #1 Figure 5 Top View of Log #1 in Position
11
11
BURNER SCREWBURNER SCREW
Figure 1 Log Identication
LOG PINSLOG PINS
44
22
66
55
11
33
77
88
99
1010
1212
1111
6KMOD / MER36MN (12 PINS)
8KMOD / MER42MN (13 PINS)
69
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
Log #2: Place the knot on the right end of Log #2 the left end of Log #1 as shown in Figure 7. Log Pin 1 touches the left
end of Log 2. See Figure 6.
Figure 6 Place Log #2 Figure 7 Knot on Log #2
Figure 8 Place Log #3
Figure 9 Place Log #4
KNOTKNOT
44
22
22
22
22
22
66
55
55
11
11
11
11
33
33
Figure 10 Place Log #5
Figure 11 Place Log #6
LOG PIN 1LOG PIN 1
Log #3: Place the right end of Log #3 against Log Pin #8 as shown in Figure 8. Rotate the left end of Log #3 clockwise
until it touches Log Pin #3.
Log #4: Place the right end of Log #4 with Log Pins #10 and #11 as shown in Figure 9. Rest the left end of Log #4 on the
notch on Log#3 shown in Figure 8.
LOG PIN #3LOG PIN #3
NOTCH FOR LOG #4NOTCH FOR LOG #4
LOG PIN #10LOG PIN #10
Log #5: Place the left end of Log #5 with the pin as shown in Figure 10. Rotate the right end of Log #5 counter clockwise
until it contacts Log Pin #9.
Log #6: Place the bottom end of Log #6 using Log Pin #5 and Log Pin #7 as a guide. Set the top end of Log #6 on Log #1
as shown in Figure 11.
LOG PIN 7LOG PIN 7
LOG PIN #12LOG PIN #12
LOG PIN 8LOG PIN 8
LOG PIN #11LOG PIN #11
LOG PIN #9LOG PIN #9
LOG PIN 5LOG PIN 5
LOG CONTACTS LOG CONTACTS
RETURN BENDRETURN BEND
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
70
2584-935
77
88
66
44
33
66
66
55
55
77
77
88
88
44
44
22
22
11
11
11
33
33
22
Figure 12 Place Log # 7
Figure 13 Place Log #8
Figure 14 6KMOD / MER36MN Shown - Base Pan Shown Unpainted
Figure 15 8KMOD / MER42MN Shown - Base Pan Shown Painted
Note Log #7 & # 8 Positions
Log #7: Place Log #7 as shown in Figure 12. The forked end rests on the base pan.
8KMOD / MER42MN models only: See Figure 15 for additional details.
Log #8: Place Log #8 as shown in Figure 13. The small end rests against Pin #2.
8KMOD / MER42MN models only: See Figure 15 for additional details.
LOG #8 AND LOG #8 AND
LOG #4 TOUCHLOG #4 TOUCH
PIN #2PIN #2
PIN #7PIN #7
71
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
E. Install Glass Media
Glass media is required to operate this appliance and must
be ordered separately at time of appliance purchase. Install
glass media as instructed.
Additional colors are available. Contact your dealer to
order.
1. The number of bags of media needed varies by appli-
ance size. See Table 1. When using multiple media
colors, mix them prior to installation. For optional per-
formance and ame appearance, ensure the media is
spread evenly.
NOTICE: Excess media on burner and base pan may
cause sooting. One thin layer of media may require less
media than indicated in the Table 1.
Model Bag Quantity (5 lbs/bag)
MER36MN 2 10 lbs
MER42MN 2-1/2 12-1/2 lbs
WARNING! Choking Hazard! Keep media out of reach
of children.
Risk Of Explosion.
• Place media according to instructions.
• Do NOT place media in a position that they
may fall into area in front of pilot.
WARNING
• Do NOT use any media other than the media supplied
with this appliance.
• Do NOT exceed one layer of media on base pan.
Fireplace will not function properly. Delayed ignition
could occur.
Risk Of Asphyxiation Or Fumes.
• Place media according to instructions.
WARNING
• Do NOT place media in area between glass and
rebox.
• Do NOT place media in a position that they may fall
into area between glass and rebox.
• Do NOT use any media other than the media
supplied with this appliance.
• Do NOT exceed one layer of media on base pan.
Fireplace will not function properly.
Gas leak could occur.
Table 1
2. Spread the media as shown in Figure 11.3. Do NOT
remove media bracket. See Figure 11.4.
WARNING! Risk of Explosion! DO NOT remove me-
dia bracket. Delayed ignition could occur. Flame perfor-
mance wlll be aected.
MEDIA BRACKETMEDIA BRACKET
DO NOT REMOVEDO NOT REMOVE
Figure 11.3 Placement of Glass Media
Figure 11.4 Media Bracket Location
MEDIA BRACKET
NO MEDIA IN GRAY AREA
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
72
3. If installing an optional rock/stone kit, refer to the in-
structions in section 11.F.
4. Install glass assembly according to instructions in Sec-
tion 11.H.
5. Install decorative barrier front according to instructions
included with front.
6. Reconnect electrical supply and turn on gas.
Note: A tall, deep orange ame should be avoided; this
type of ame may cause increased soot residue. If this
type of ame is noticed, try adjusting the media directly
beneath the ame. If all ames appear to be tall and deep
orange in color, then open the primary air shutter.
NOTICE: Flames should not appear orange or stretch to
the top of rebox. If ames are dark orange with dark,
smoky tips, provide more primary air to the burner by
opening the air shutter accordingly.
Risk Of Explosion.
• Place media according to instructions.
• Do NOT place media in a position that they
may fall into area in front of pilot.
WARNING
• Do NOT use any media other than the media supplied
with this appliance.
• Do NOT exceed one layer of media on base pan.
Fireplace will not function properly. Delayed ignition
could occur.
Risk Of Asphyxiation Or Fumes.
• Place media according to instructions.
WARNING
• Do NOT place media in area between glass and
rebox.
• Do NOT place media in a position that they may fall
into area between glass and rebox.
• Do NOT use any media other than the media
supplied with this appliance.
• Do NOT place media on base pan in excess of the
amount of media directed in Table 1.
Fireplace will not function properly.
Gas leak could occur.
An optional rock media kit is available for use with these
models. The rock jig, included in the manual bag assem-
bly, must be used for proper placement of the optional
rock media. Table 2 shows the number of bags included
in the kit.
1. Bend tab on rock jig down as shown in Figure 11.5.
2. Place rock jig on glass media with lasered text “ROCK
JIG” facing up. Ensure that the rock jig sits ush
against the pilot bracket. See Figure 11.6.
Note: Rock jig must be in place prior to installation of
stones.
2. Place rocks in a random manner around the rock jig as
shown in Figure 11.7.
3. Remove rock jig.
Consumer: Retain rock jig for future maintenance or
service needs.
Figure 11.6 Place Rock Jig
BEND TAB
Figure 11.5 Bend Tab on Rock Jig
Model Kit Name Kit Quantity
MER36MN STONES-NATURAL 3
MER42MN STONES-NATURAL 3
Table 2
PILOT BRACKETPILOT BRACKET
F. Install Rock Jig for Optional Rock Media
(STONES-NATURAL)
73
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
Figure 11.7 Place Rocks
STONESSTONES
G. IntelliFire Touch
®
Control System Setup
• Detailed instructions for electrical wiring and connec-
tions are provided in Section 8.
• Verify that the 3-Position switch on the IFT-ECM is
switched to the REMOTE position. Detailed Operating
Instructions for the IFT-ECM are provided in Section
3.K of the Owner’s Manual.
Figure 11.8 IFT-ECM
3 POSITION SWITCH
TOP VIEW
LED INDICATOR
If this appliance is being upgraded to an optional Intelli-
Fire Touch
Remote Control, and/or an optional power vent
or optional fan are added as new accessory upgrade(s)
to replace:
1. The RC400 remote will need to be paired to the ECM.
2. Follow the installation instructions provided with the
IntelliFire® Touch
remote and/or accessory kit(s).
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
74
H. Fixed Glass Assembly Removal and Re-
placement
WARNING! Risk of Asphyxiation! Handle xed glass
assembly with care. Inspect the gasket to ensure it is
undamaged and inspect the glass for cracks, chips or
scratches.
• DO NOT strike, slam or scratch glass.
• DO NOT operate replace with glass removed, cracked,
broken or scratched.
• Replace as a complete assembly.
Removing Fixed Glass Assembly
• Pull the four glass assembly latches away from the tabs
on the glass frame. Remove glass assembly from the
appliance. See Figure 11.9.
Replacing Fixed Glass Assembly
• Replace the glass assembly on the appliance. Hold glass
in place with one hand. Use the other hand to pull out
and latch the four glass assembly latches onto the glass
frame tabs.
• Inspect and operate all glass latches to ensure they
move freely and no obstructions are present.
• Reinstall decorative barrier front.
Figure 11.9 Fixed Glass Assembly
I. Install Decorative Barrier Front
WARNING! Risk of Fire! Install ONLY decorative barrier
fronts approved by Hearth & Home Technologies. Unap-
proved decorative barrier fronts could cause replace to
overheat.
IMPORTANT! This fireplace requires an installed
decorative barrier front to prevent direct contact with
the hot viewing glass. DO NOT operate the replace
with the barrier removed.
Contact your dealer or Hearth & Home Technologies if
the barrier is not present or help is needed to properly
install one.
For more information refer to the instructions supplied with
your decorative barrier front.
GLASS
ASSEMBLY
LATCHES
(BOTH BOTTOM
AND TOP)
GLASS FRAME
TABS
75
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
12 12
Reference Materials
DVP Vent Components
D V P 4 5 45 Degree Elbow DVP-TVHW Vertical Termination Cap (High Wind)
D V P 9 0 S T 90 Degree Elbow DVP-HPC High Performance Cap
D V P - H V S Vent Support DVP-BEK2 DVP-HPC Cap Brick Extension
D V P - R D S Roof Deck Insulation Shield COOL-ADDM Cap Shield
D V P - W S Wall Shield Firestop DVP-TB1 Basement Vent Cap
D V P - F S Ceiling Firestop DRC-RADIUS Cap Shield
DV P- TR AP
Horizontal Termination Cap
(DVP-TRAP1/2/K1/K2/HPC1/HPC2)
DVP-HRC-SS High Rise Cap
RF6 / RF12 Roof Flashings DVP-HRC-ZC-SS Zero Clearance High Rise Cap
DVP-TRAPFL Flashing TRAP-VSS Extended Heat Shield
DVP-HSM-B Extended Heat Shield UNIV-AS2 Universal Attic Shield
SLP Vent Components
SLP45 45 Degree Elbow SLP-CCS-BK Cathedral Ceiling Support Box-Black
SLP90 90 Degree Elbow SLP-DCF-BK Ceiling Firestop Black
DVP-SLP24 Adapter SLP-WT-BK Wall Thimble Black
SLK-SNKD Snorkel Termination Cap SLP-RDS Roof Deck Insulation Shield
SLP-TVHW Vertical Termination Cap SLP-FS Ceiling Firestop
SLP-TB1 Basement Vent Cap SLP-WS Wall Shield Firestop
SLP-HVS Horizontal Pipe Support DVP-2SL Adapter
SLP-TRAP Horizontal Termination Cap (TRAP1/2) DVP-HSM-B Extended Heat Shield
SL-2DVP Adapter SLP-HRC-SS Horizontal Termination Cap
SLP-HHW2 Horizontal High Wind Termination Cap
Power Vent Components
P V V - S L P Vertical Power Vent PVLP-SLP Power Vent Low Prole
P V I - S L P - B Power Vent Inline SLP-LPC SLP Low Prole Cap
Decorative Terminations / Shrouds
Only use listed decorative termination caps/shrouds with Hearth & Home Technologies approved venting systems.
This applies to both DVP and SLP venting systems.
DTO134 Octagon Decor Cap LDS33 Decor Shroud 36 x 36
DTO146 Octagon Decor Cap LDS46 Decor Shroud 48 x 72
DTS134 Square Decor Cap LDS-BV Decor Shroud 26 x 26
DTS146 Square Decor Cap
A. Approved Vent Components List
Vent components on this list are approved for use with these models. See Vent Components document in manual bag for details,
such as dimensions and eective lengths. The Vent Components document (2583-983) is also available on myhht.com.
Majestic • MER36MN, MER42MN Installation Manual • 2599-980 Rev. D • 9/23
76
B. Accessories
WARNING! Risk of Fire and Electric Shock! Use ONLY Hearth & Home Technologies-approved optional accessories with
this appliance. Using non-listed accessories could result in a safety hazard and will void the warranty.
Contact your dealer for more information and details, such as color options and specic quantities required, on individual
accessories. A qualied service technician must install the approved accessories. Operate installed accessories according
to the included instructions.
Note: Some optional accessories must be installed at the time of appliance installation. See Section 2.A.
Printed in U.S.A. - Copyright 2023
Majestic, a brand of Hearth & Home Technologies
7571 215
th
Street West, Lakeville, MN 55044
www.majesticproducts.com
Please contact your Majestic dealer with any questions or concerns.
For the location of your nearest Majestic dealer,
please visit www.majesticproducts.com.
Options:
Remote Controls, Wall Controls and Wall Switches
IFT-RC150-MAJ IntelliFire Touch wireless wall switch
IFT-RC400 IntelliFire Touch remote control
IntelliFire Wi-Fi module with IntelliFire App
IFT-WFM IntelliFire Wi-Fi module for app
Heat Management Systems Kits
HEAT-OUT-GAS Heat-Out-Gas
HEAT-ZONE-GAS Heat-Zone-Gas
HZMR-ADP Heat Zone Adapter
PH-MR Passive Heat-Front, Side or Top Discharge
PH-SIDETRIM Passive Heat registers for side discharge (requires PH-MR)
PH-FRTTRIM-36, PH-FRTTRIM-42 Passive Heat registers for front discharge (requires PH-MR)
Glass Media (Required to Complete)
MEDIA-CP (5 lb bag) Crushed glass media - Copper
MEDIA-CY (5 lb bag) Crushed glass media - Crystal
MEDIA-GT (5 lb bag) Crushed glass media - Graphite
MEDIA-SM (5 lb bag) Crushed glass media - Smoked Embers
Stone Media
STONES-NATURAL
Log Sets
LOGS-KMOD
Fan
GFK-160A
