Installation Manual - DANGER

Heat & Glo • MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72 -C/ST-C Installation Manual • 2600-980 Rev. K • 3/21. 2. Safety Alert Key:.

Verified all clearances meet installation manual requirements. ... Failure to install appliance according to these instructions can lead to a fire or explosion. Install ONLY components ... if you have questions. Printed in U.S.A. - Copyright 2021.

DANGER

2600 980 MEZZO36486072-C INSTALL
Installation Manual
Installation and Appliance Setup

CAUTION! Risk of Fire! DO NOT store instruction manuals inside fireplace cavity. High temperatures could cause a fire.

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!
Models:
MEZZO36-C MEZZO36ST-C MEZZO48-C MEZZO48ST-C MEZZO60-C MEZZO60ST-C MEZZO72-C MEZZO72ST-C

WARNING: FIRE OR EXPLOSION HAZARD Failure to follow safety warnings exactly could result in serious injury, death, or property damage.
· DO NOT store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.
· What to do if you smell gas - 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 supplier's instructions.
- If you cannot reach your gas supplier, call the fire department.
· Installation and service must be performed by a qualified installer, service agency, or the gas supplier.

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 certified kit is used.

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.
Decorative barrier front must be ordered separately at time of appliance purchase. See Section 3.A.

Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 1

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 Specific and Important Safety Information A. Appliance Certification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 B. Glass Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 C. BTU Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 D. High Altitude Installations. . . . . . . . . . . . . . . . . . . . . . . . . . . 4 E. Non-Combustible Materials Specification. . . . . . . . . . . . . . 5 F. Combustible Materials Specification . . . . . . . . . . . . . . . . . . 5 G. Electrical Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 H. California . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 I. Requirements for the Commonwealth of Massachusetts. . . 6
2 Getting Started A. Design and Installation Considerations . . . . . . . . . . . . . . . . 7 B. Good Faith Wall Surface . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 C. Tools and Supplies Needed. . . . . . . . . . . . . . . . . . . . . . . . . 9 D. Inspect Appliance and Components. . . . . . . . . . . . . . . . . . . 9
3 Framing and Clearances A. Appliance/Decorative Barrier Front Dimension Diagrams. 10 B. Appliance Location and Clearances to Combustibles . . . . 17 C. Constructing the Appliance Chase. . . . . . . . . . . . . . . . . . . 29 D. Floor Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
4 Termination Location and Vent Information A. Approved Pipe. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 B. Vent Termination Minimum Clearances. . . . . . . . . . . . . . . 31 C. Vent Terminal Clearances . . . . . . . . . . . . . . . . . . . . . . . . . 33 D. Use of Elbows . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 E. Vent Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
5 Vent Clearances and Vent Framing A. Vent Clearances to Combustibles . . . . . . . . . . . . . . . . . . . 43 B. Wall Penetration Framing/Firestops. . . . . . . . . . . . . . . . . . 44 C. Ceiling Firestop/Floor Penetration Framing. . . . . . . . . . . . 45 D. Install Attic Insulation Shield. . . . . . . . . . . . . . . . . . . . . . . . 45
6 Appliance Preparation A. Top Standoff Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . 46 B. Prepare For Heat Management. . . . . . . . . . . . . . . . . . . . . 47 C. Securing and Leveling the Appliance. . . . . . . . . . . . . . . . . 48 D. Installing Non-Combustible Facing Material . . . . . . . . . . . 49

7 Venting A. Assemble Vent Sections (DVP Pipe Only) . . . . . . . . . . . . 50 B. Assemble Slip Sections. . . . . . . . . . . . . . . . . . . . . . . . . . . 51 C. Secure the Vent Sections. . . . . . . . . . . . . . . . . . . . . . . . . . 52 D. Disassemble Vent Sections. . . . . . . . . . . . . . . . . . . . . . . . 52 E. Vertical Termination Requirements. . . . . . . . . . . . . . . . . . . 53 F. Horizontal Termination Requirements . . . . . . . . . . . . . . . . 54
8 Electrical Information A. General Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 B. Wiring Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
9 Gas Information A. Fuel Conversion. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 B. Gas Pressure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 C. Gas Service Access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60 D. Gas Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62 E. High Altitude Installations. . . . . . . . . . . . . . . . . . . . . . . . . . 62 F. Air Shutter Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
10 Finishing A. Facing Material. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 B. Drywall Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65 C. Decorative Barrier Fronts. . . . . . . . . . . . . . . . . . . . . . . . . . 68 D. Mantel and Wall Projections. . . . . . . . . . . . . . . . . . . . . . . . 73
11 Appliance Setup A. Fixed Glass Assembly Removal and Replacement. . . . . . 76 B. Remove the Shipping Materials/Install Bottom Glass
Shield. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76 C. Clean the Appliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 D. Install Glass Refractory Panels. . . . . . . . . . . . . . . . . . . . . 77 E. Install Media . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 F. Install Log Set (Optional) . . . . . . . . . . . . . . . . . . . . . . . . . . 79 G. IntelliFire Touch® Control System Setup. . . . . . . . . . . . . . . 79 H. Install Decorative Barrier Front. . . . . . . . . . . . . . . . . . . . . 79
12 Reference Materials A. Vent Components Diagrams . . . . . . . . . . . . . . . . . . . . . . . 80 B. Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
 = Contains updated information.



2 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

 Installation Standard Work Checklist

ATTENTION INSTALLER:
Follow this Standard Work Checklist
This standard work checklist is to be used by the installer in conjunction with, not instead of, the instructions contained in this

installation manual. Customer:

Date Installed:

Lot/Address:

Location of Fireplace:

Installer:

Model (circle one): MEZZO36-C MEZZO48-C MEZZO60-C MEZZO72-C Dealer/Distributor Phone #

MEZZO36ST-C MEZZO48ST-C MEZZO60ST-C MEZZO72ST-C

Serial #:

WARNING! Risk of Fire or Explosion! Failure to install appliance according to these instructions can

lead to a re or explosion. Install ONLY components and accessories approved by Hearth & Home Technolo-

gies. Unapproved components and accessories could cause replace to overheat.

Appliance Install Sections 3 and 6 Veried that the chase is insulated and sealed. (Pg. 29) Required factory included non-combustible board is installed. (Pg 49) Standoffs bent up into installation position and secured. (Pg. 46) Veried clearances to combustibles. (Pg. 17-28) Fireplace is leveled and secured. (Pg. 48) Header no wider than 3.5 in.(2x4) (Pg. 19-22) Heat management system(s) and/or power vent properly installed.

YES

IF NO, WHY? ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ _____________________________ ___________________________

Venting/Chimney Sections 4,5 and 7 Venting conguration complies to vent diagrams. (Pg 35-42)
Venting installed, locked, and secured in place with proper clearance.
(May need to order separately.) Firestops installed. (Section 5) Attic insulation shield installed. (Pg 45) Exterior wall/Roof ashing installed and sealed. (Section 7) Terminations installed and sealed. (Section 7)

___________________________ ___________________________
___________________________ ___________________________ ___________________________ ___________________________

Electrical Section 8 (Pg 56-59) Unswitched power (110-120 VAC) provided to the appliance.
Switch wires properly installed.

___________________________ ___________________________

Gas Section 9 (Pg 60-63) 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 64-75) Combustible materials not installed in non-combustible areas. Veried all clearances meet installation manual requirements. Finishing done correctly using inside t or overlap t method. Bottom nishing template and nishing guards removed.
Mantels and wall projections comply with installation manual requirements.

___________________________ ___________________________ ___________________________ ___________________________
___________________________

Appliance Setup Section 11 (Pg 76-79)

All packaging and protective materials removed (inside & outside of appliance).

___________________________

Refractories and media installed correctly.

___________________________

Glass assembly installed and secured.

___________________________

Accessories installed properly.

___________________________

Decorative barrier front properly installed. (May 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.

___________________________

Lights work in all switched positions (if so equipped).

___________________________

Component heat shield is installed. (Pg 57)

___________________________

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. 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 ___________

 = Contains updated information.

(Builder / Gen. Contractor/) (Installer)

(Date)
2600-982 Rev. E 3/21

Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 3

1 Product Specific and Important Safety Information

A. Appliance Certification
MODEL: MEZZO36-C, MEZZO36ST-C, MEZZO48-C, MEZZO48ST-C, MEZZO60-C, MEZZO60ST-C, MEZZO72-C, MEZZO72ST-C
LABORATORY: Underwriters Laboratories, Inc. (UL) TYPE: Direct Vent Heater STANDARD: CSA / ANSI Z21.88-2019 · CSA 2.33-2019
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 Certified for Installation in a Bedroom or a Bedsitting Room.
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.
NOT INTENDED FOR USE AS A PRIMARY HEAT SOURCE. This appliance is tested and approved as either supplemental room heat or as a decorative appliance. It should not be factored as primary heat in residential heating calculations.
B. Glass Specifications
This appliance is equipped with 5 mm ceramic glass. Replace glass only with 5 mm ceramic glass. Please contact your dealer for replacement glass.

C. BTU Specifications

Models
(U.S. or Canada)

MEZZO36-C (NG)
MEZZO36-C (Propane)
MEZZO36ST-C (NG)
MEZZO36ST-C (Propane)
MEZZO48-C (NG)
MEZZO48-C (Propane)
MEZZO48ST-C (NG)

(0-2000 ft) (0-2000 ft) (0-2000 ft) (0-2000 ft) (0-2000 ft) (0-2000 ft) (0-2000 ft)

MEZZO48ST-C (Propane)

(0-2000 ft)

MEZZO60-C (NG)

(0-2000 ft)

MEZZO60-C (Propane)

(0-2000 ft)

MEZZO60ST-C (NG)

(0-2000 ft)

MEZZO60ST-C (Propane)

(0-2000 ft)

MEZZO72-C (NG)

(0-2000 ft)

MEZZO72-C (Propane)

(0-2000 ft)

MEZZO72ST-C (NG)

(0-2000 ft)

MEZZO72ST-C (Propane)

(0-2000 ft)

Maximum Input BTU/h

Minimum Input BTU/h

30,000 17,500

29,000 15,500

30,000 17,500

29,000 15,500

40,000 21,000

36,000 19,500

40,000 21,000

36,000 19,500

50,000 26,000

41,000 22,000

50,000 26,000

41,000 22,000

58,000 30,000

46,000 24,000

58,000 30,000

46,000 24,000

Orifice Size (DMS)
#36 #52 #36 #52 .124 #49 .124 #49
#28
#48
#28
#48
#23
#45
#23
#45

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 certified 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 orifice size.
4 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

E. Non-Combustible Materials Specification
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 Specification
Materials made of or surfaced with wood, compressed paper, plant fibers, plastics, or other material that can ignite and burn, whether flame 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.
Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 5

Note: The following requirements reference various Massachusetts and national codes not contained in this document.
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 finished grade in the area of the venting, including but not limited to decks and porches, the following requirements shall be satisfied:
Installation of Carbon Monoxide Detectors
At the time of installation of the side wall horizontal vented gas fueled equipment, the installing plumber or gas fitter shall observe that a hard wired carbon monoxide detector with an alarm and battery back-up is installed on the floor level where the gas equipment is to be installed. In addition, the installing plumber or gas fitter shall observe that a battery operated or hard wired carbon monoxide detector 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 qualified licensed professionals for the installation of hard wired carbon monoxide detectors.
In the event that the side wall horizontally vented gas fueled 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 floor 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 during 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 accordance with the above provisions shall comply with NFPA 720 and be ANSI/UL 2034 listed and IAS certified.
Signage
A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum height of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled heating appliance or equipment. The sign shall read, in print size no less than one-half (1/2) in. in size, "GAS VENT DIRECTLY BELOW. KEEP CLEAR OF ALL OBSTRUCTIONS".

Inspection
The state or local gas inspector of the side wall horizontally vented gas fueled equipment shall not approve the installation unless, upon inspection, the inspector observes 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 fueled 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 provide the parts for venting the flue gases, but identifies "special venting systems", the following requirements shall be satisfied by the manufacturer:
· The referenced "special venting system" instructions shall be included with the appliance or equipment installation instructions; and
· The "special venting systems" shall be Product Approved by the Board, and the instructions for that system shall include a parts list and detailed installation instructions.
A copy of all installation instructions for all Product Approved side wall horizontally vented gas fueled equipment, all venting instructions, all parts lists for venting instructions, and/or all venting design instructions shall remain with the appliance or equipment at the completion of the installation.
See Gas Connection section for additional Commonwealth of Massachusetts requirements.

6 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

2 Getting Started
A. Design and Installation Considerations
WARNING! Risk of Fire or Explosion! Read all instructions before starting the installation. Heat & Glo 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 additional outside air source is required. Installation MUST comply with local, regional, state and national codes and regulations. Consult insurance carrier, local building inspector, fire officials 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 configuration to be used. If Passive
Heat will be installed, consider location of discharge opening in relation to venting and other construction materials. · Gas supply piping requirements. · Provisions for optional heat management system(s). · Electrical wiring requirements. · Framing and finishing details. · Whether optional accessories--devices such as a fan, wall switch, or remote control--are desired.
Installation and service of this appliance should be performed by qualified personnel. Hearth & Home Technologies recommends HHT Factory Trained or NFI certified professionals.
Improper installation, adjustment, alteration, service or maintenance can cause injury or property damage. For assistance or additional information, consult a qualified service technician, service agency or your dealer.
Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 7

B. Good Faith Wall Surface
The MEZZO-C models may be installed with or without optional heat management systems, including the Passive Heat kit. The installation of a heat management system will affect certain aspects of the appliance installation including framing dimensions and clearances to combustibles. Note that Figure 2.3 in this section refers to the wall surface temperatures when the Passive Heat kit is installed.

FIREPLACE OPENING

125°F 125°F

130°F

140°F

42 in.

145°F

36 in. 30 in.

155°F

24 in.

18 in. 170°F
12 in. 6 in.

MEASUREMENTS FROM TOP EDGE OF THE FIREPLACE OPENING APPLIANCE FRONT
FACTORY-SUPPLIED NON-COMBUSTIBLE BOARD SHOWN INSTALLED.

Figure 2.1 Good Faith Wall Surface Temperatures Above Appliance (MEZZO36-C/MEZZO36ST-C/MEZZO48-C/MEZZO48ST-C)
FIREPLACE OPENING

125°F 125°F

135°F

140°F

42 in.

155°F

36 in. 30 in.

190°F

24 in.

18 in. 245°F
12 in. 6 in.

MEASUREMENTS FROM TOP EDGE OF THE OPENING

APPLIANCE FRONT
FACTORY-SUPPLIED NON-COMBUSTIBLE BOARD SHOWN INSTALLED.

OPTIONAL PASSIVE HEAT KIT INSTALLED
FIREPLACE OPENING

95°F 95°F 95°F

95°F

48 in.

105°F

42 in.

115°F

36 in. 30 in.

120°F

24 in.

18 in. 144°F
12 in. 6 in.

MEASUREMENTS FROM TOP EDGE OF THE OPENING
APPLIANCE FRONT
FACTORY-SUPPLIED NON-COMBUSTIBLE BOARD SHOWN INSTALLED.
Figure 2.3 Good Faith Wall Surface Temperatures Above Appliance with Passive Heat Kit Installed

If installing a television (TV) above the appliance, see Section 3 of the appliance Owner's Manual.
NOTICE: Surface temperatures listed above are taken with a temperature measuring probe as prescribed by the test standard used for appliance certification. 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 finishing materials that are able to withstand these conditions. For additional finishing guidelines, see Section 10.

Figure 2.2 Good Faith Wall Surface Temperatures Above Appliance (MEZZO60-C/MEZZO60ST-C/MEZZO72-C/MEZZO72ST-C)
8 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

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.)

Plumb line

Safety glasses/Gloves

Wrenches

Reciprocating saw

1/4 in. nut driver

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)

D. Inspect Appliance and Components
WARNING! Risk of Fire or Explosion! Damaged parts could impair safe operation. DO NOT install damaged, incomplete 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 qualified 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.
· If packaged separately, the media, refractory, and/or optional log kits must be installed.
· Report to your dealer any parts damaged in shipment, particularly the condition of the glass.
· This product is factory-equipped with an IntelliFire Touch® remote control, which was paired to the appliance at the factory. This specific remote control needs to remain with the contents of the manual bag. Do not install batteries in the remote control until performing the final appliance setup and checklist.
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.
· Modification 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.

Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 9

3 Framing and Clearances
A. Appliance/Decorative Barrier Front Dimension Diagrams
Dimensions are actual appliance dimensions. Use for reference only. For framing dimensions and clearances refer to Section 5.

HEAT MANAGEMENT SYSTEMS KNOCKOUTS

IMPORTANT: Must use appropriate

knockout(s) for the selected Heat

Management System. See Section 6.

J

I

M

K

H oL CENTERED ON APPLIANCE

V
U T

N Q
O SR
P
GAS ACCESS

A B

D

G

C
E

F
ELECTRICAL ACCESS

Location
A B C D E F G H I J K

MEZZO36-C

Inches Millimeters

49-1/2

1257

39-1/4

997

15-5/8

397

42-1/2

1080

4

102

8-9/16

218

63

1600

8-9/16

218

1

25

46-3/16

1173

17-1/8

435

MEZZO48-C

Inches Millimeters

61-1/2

1562

51-1/8 15-5/8

1299 397

42-1/2

1080

4

102

8-9/16

218

63

1600

8-9/16

218

1

25

58

1473

17-1/8

435

Location
L M N O P Q R S T U V

MEZZO36-C

Inches Millimeters

8

203

18-5/8

473

41-3/4

1061

2-3/8

60

8-9/16

218

24-1/2

622

7-1/4

184

8-7/8

225

2-3/4

70

23-3/4

603

36-5/8

930

MEZZO48-C

Inches Millimeters

8

203

18-5/8

473

41-3/4

1061

2-3/8

60

8-9/16

218

24-1/2

622

7-1/4

184

8-7/8

225

2-3/4

70

23-3/4

603

36-5/8

930

Figure 3.1 Appliance Dimensions - MEZZO36-C, MEZZO48-C 10 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

HEAT MANAGEMENT SYSTEMS KNOCKOUTS IMPORTANT: Must use appropriate knockout(s) for the selected Heat Management System. See Section 6.
MK

V
U T

N Q
O SR
P GAS ACCESS

J

I

H oL CENTERED ON APPLIANCE
A B
G D C
E
F ELECTRICAL ACCESS

Location
A B C D E F G H I J K

MEZZO60-C

Inches Millimeters

74

1880

63-1/8

1603

15-5/8

397

48-1/2

1232

4

102

8-9/16

218

63

1600

8-9/16

218

1

25

70

1778

17-1/8

435

MEZZO72-C

Inches Millimeters

86

2184

75-1/8

1908

15-5/8

397

48-1/2

1232

4

102

8-9/16

218

75

1905

8-9/16

218

1

25

82

2083

17-1/8

435

Location
L M N O P Q R S T U V

MEZZO60-C

Inches Millimeters

8

203

18-5/8

473

47-3/4

1213

2-3/8

60

8-9/16

218

24-1/2

622

7-1/4

184

8-7/8

225

2-3/4

70

23-3/4

603

36-1/2

927

MEZZO72-C

Inches Millimeters

8

203

18-5/8

473

47-3/4

1213

2-3/8

60

8-9/16

218

24-1/2

622

N/A

N/A

8-7/8

225

2-3/4

70

23-3/4

603

36-1/2

927

Figure 3.2 Appliance Dimensions - MEZZO60-C, MEZZO72-C Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 11

HEAT MANAGEMENT SYSTEMS KNOCKOUTS IMPORTANT: Must use appropriate knockout(s) for the selected Heat Management System. See Section 6.
MK

V
U T

N Q
O SR
P GAS ACCESS

J

I

H oL CENTERED ON APPLIANCE A B

D

G

C
E

F
ELECTRICAL ACCESS

Location
A B C D E F G H I J K

MEZZO36ST-C

Inches Millimeters

50

1270

39-1/4

997

15-5/8

397

42-1/2

1080

4

102

8-9/16

218

63

1600

8-9/16

218

1/2

13

46-3/16

1173

17-1/8

435

MEZZO48ST-C

Inches Millimeters

62

1575

51-1/8

1299

15-5/8

397

42-1/2

1080

4

102

8-9/16

218

63

1600

8-9/16

218

1/2

13

58

1473

17-1/8

435

Location
L M N O P Q R S T U V

MEZZO36ST-C

Inches Millimeters

8

203

18-1/8

460

41-3/4

1061

2-3/8

60

8-9/16

218

24-1/2

622

7-1/4

184

8-7/8

225

2-3/4

70

23-3/4

603

36-1/2

927

MEZZO48ST-C

Inches Millimeters

8

203

18-1/8

460

41-3/4

1061

2-3/8

60

8-9/16

218

24-1/2

622

7-1/4

184

8-7/8

225

2-3/4

70

23-3/4

603

36-1/2

927

Figure 3.3 Appliance Dimensions - MEZZO36ST-C, MEZZO48ST-C 12 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

HEAT MANAGEMENT SYSTEMS KNOCKOUTS IMPORTANT: Must use appropriate knockout(s) for the selected Heat Management System. See Section 6.

M

K

GAS ACCESS

V
U T

N
Q O
SR P
GAS ACCESS

J I

H oL CENTERED ON APPLIANCE A B

D

G

C
E

F
ELECTRICAL ACCESS

Location
A B C D E F G H I J K

MEZZO60ST-C

Inches Millimeters

74

1880

63-1/8

1603

15-5/8

397

48-1/2

1232

4

102

8-9/16

218

63

1600

8-9/16

218

1/2

13

70

1778

17-1/4

438

MEZZO72ST-C

Inches Millimeters

86

2184

75-1/8

1908

15-5/8

397

48-1/2

1232

4

102

8-9/16

218

75

1905

8-9/16

218

1/2

13

82

2083

17-1/4

438

Location
L M N O P Q R S T U V

MEZZO60ST-C

Inches Millimeters

8

203

18-1/4

464

47-3/4

1213

2-3/8

60

8-9/16

218

24-1/2

622

7-1/4

184

8-7/8

225

2-3/4

70

23-3/4

603

36-1/2

927

MEZZO72ST-C

Inches Millimeters

8

203

18-1/4

464

47-3/4

1213

2-3/8

60

8-9/16

218

24-1/2

622

N/A

N/A

8-7/8

225

2-3/4

70

23-3/4

603

36-1/2

927

Figure 3.4 Appliance Dimensions - MEZZO60ST-C, MEZZO72ST-C Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 13

LOFT FORGE Decorative Barrier Front
IMPORTANT! This fireplace requires an installed decorative barrier front to prevent direct contact with the hot viewing glass. DO NOT operate the fireplace with the barrier removed. Decorative barrier front must be ordered at time of fireplace purchase. If decorative barrier front is not present, contact dealer.
Note: See Section 10 for hearth, mantel and finishing requirements.

Barrier Mesh: Integral to

EF

A

Decorative Barrier Front

C

B

D

Location
A B C D E F

MEZZO36-C MEZZO36ST-C

Inches Millimeters

26-1/4

667

7-1/8

181

36-3/4

933

42-3/4

1086

13

330

19

483

MEZZO48-C MEZZO48ST-C

Inches Millimeters

26-1/4

667

7-1/8

181

48-3/4

1238

54-3/4

1391

13

330

19

483

MEZZO60-C MEZZO60ST-C

Inches Millimeters

26-1/4

667

7-1/8

181

60-3/4

1543

66-3/4

1695

13

330

19

483

The Loft Forge decorative barrier front has an installed depth of 3/4 in. (19 mm), measured from the front of the non-combustible finishing material to the front of the decorative barrier front.

Figure 3.5 Loft Forge (Overlap Fit) Decorative Barrier Front Dimensions 14 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

QUATTRO DECORATIVE BARRIER FRONT
IMPORTANT! This fireplace requires an installed decorative barrier front to prevent direct contact with the hot viewing glass. DO NOT operate the fireplace with the barrier removed. Decorative barrier front must be ordered at time of fireplace purchase. If decorative barrier front is not present, contact dealer.
Note: See Section 10 for hearth, mantel and finishing requirements.

A

Barrier Mesh: Integral to

Decorative Barrier Front

EF

G

B

C

D

Location
A B C D E F G

MEZZO36-C MEZZO36ST-C

Inches Millimeters

27-1/4

692

5-7/8

149

36-7/16

926

45-5/8

1159

12-1/2

318

21-3/8

543

29-1/8

740

MEZZO48-C MEZZO48ST-C

Inches Millimeters

27-1/4

692

5-7/8

149

48-9/16

1234

57-1/8

1451

12-1/2

318

21-3/8

543

40-1/2

1029

MEZZO60-C MEZZO60ST-C

Inches Millimeters

27-1/4

692

5-7/8

149

60-9/16

1538

69-1/8

1756

12-1/2

318

21-3/8

543

52-1/2

1334

The Quattro decorative barrier front has an installed depth of 2-1/8 in. (54 mm), measured from the front of the non-combustible finishing material to the front of the decorative barrier front.
Figure 3.6 Quattro (Overlap Fit) Decorative Barrier Front Dimensions

Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 15

CLEAN FACE TRIM DECORATIVE BARRIER FRONT
IMPORTANT! This fireplace requires an installed decorative barrier front to prevent direct contact with the hot viewing glass. DO NOT operate the fireplace with the barrier removed. Decorative barrier front must be ordered at time of fireplace purchase. If decorative barrier front is not present, contact dealer.
Note: See Section 10 for hearth, mantel and finishing requirements.
A

G
H F

Barrier Mesh: Integral to Decorative Barrier Front

C B

D E

Location A

MEZZO36-C MEZZO36ST-C

Inches Millimeters

39

991

B

16-3/4

425

C

13-1/8

333

D

37-3/16

945

E

40-5/16

1024

F

24

610

G

5/8

16

H

25

635

MEZZO48-C MEZZO48ST-C

Inches Millimeters

51

1295

16-3/4 13-1/8 49-3/16 52-5/16
24 5/8 25

425 333 1249 1329 610 16 635

MEZZO60-C MEZZO60ST-C

Inches Millimeters

63

1600

16-3/4 13-1/8 61-3/16 64-5/16
24 5/8 25

425 333 1554 1634 610 16 635

MEZZO72-C MEZZO72ST-C

Inches Millimeters

75

1905

16-3/4 13-1/8 73-3/16 76-5/16
24 5/8 25

425 333 1859 1938 610 16 635

Figure 3.7 Clean Face Trim Front (Inside Fit) Decorative Barrier Front Dimensions 16 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

B. Appliance Location and Clearances to Combustibles
When selecting a location for the appliance it is important to consider the required clearances to walls and allow sufficient clearance for heat management systems venting. See Figure 3.8 and Figure 3.9.
WARNING! Risk of Fire or Burns! Provide adequate clearance around air openings and for service access. Due to high temperatures, the appliance should be located out of traffic and away from furniture and draperies.

NOTICE: Illustrations reflect typical installations and are FOR DESIGN PURPOSES ONLY. Illustrations/diagrams are not drawn to scale. Actual installation may vary due to individual design preference.

E G
B

AG

B

C

D

Refer to Section 10 for hearth, mantel and wall projection information.

If a Heat Management System will be

installed, refer to Section 6.B for information.

H

18 in. (457 mm) required when Passive Heat Side

Discharge Kit is installed. Refer to the Passive

B

Heat kit instructions for more information.

F

Model

A

B

C

D

E

F

G

MEZZO36-C

Inches Millimeters

62-1/2 1588

48-1/4 1226

88-1/8 2238

24-1/2

18-3/4

1

622

476

25

MEZZO48-C

Inches Millimeters

70-3/4 1797

60-1/4 1530

100-3/8 2550

See Section

28-1/2 724

18-3/4 476

1 25

MEZZO60-C

Inches

79-1/2

72-1/4

112-3/8

10, Figure 10.17 and

31-3/4

18-3/4

1

Millimeters 2019

1835

2854

10.18.

807

476

25

MEZZO72-C

Inches Millimeters

88 2235

84-1/4 2140

124-3/8 3159

35-1/4

18-3/4

1

895

476

25

H 50 1270 62 1575 74 1880 86 2184

Figure 3.8 Appliance Locations: MEZZO Single-Sided Models

Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 17

NOTICE: This See-Through appliance is NOT designed or approved for an indoor/outdoor application.

DC

C

E

E

A

B

D

MODEL

A

B

C

D

E

Inches 48-1/4 17-1/8 48

1/2

1

MEZZO36ST-C

Millimeters 1226 435 1219

13

25

Inches 60-1/4 17-1/8 48

1/2

1

MEZZO48ST-C

Millimeters 1530 435 1219

13

25

Inches 72-1/4 17-1/8 48

1/2

1

MEZZO60ST-C

Millimeters 1835 435 1219

13

25

Inches 84-1/4 17-1/8 48

1/2

1

MEZZO72ST-C

Millimeters 2140 435 1219

13

25

Figure 3.9 Appliance Locations: MEZZO See-Through Models

18 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

A
CEILING

HEADER DEPTH**
B
C D

F

G

NOTE: Header MUST be installed

on end as shown in diagram. J

I

E K
H

MEZZO36-C
Inches Millimeters

APPLIANCE MAY BE INSTALLED

OFF OF FLOOR***

NOTE: E & K dimensions will change if Passive Heat option is installed.

Reference the instructions included with the Passive Heat Kit for dimensions.

A
Rough Opening (Vent Pipe)

MINIMUM FRAMING DIMENSIONS*

B

C

D

Rough Opening (Height)

Rough Opening (Depth)

Rough Opening (Width)

E
Clearance to Ceiling

F

G

Combustible Combustible

Floor

Flooring

10

42

18-1/4

48-1/4

31

0

0

254

1067

464

1226

787

0

0

MEZZO36-C
Inches Millimeters

MINIMUM FRAMING DIMENSIONS*

H

I

J

Behind Appliance

Sides of Appliance

Front of Appliance

1

1

48

25

25

1219

K Clearance to Ceiling
55-1/2 1410

MEZZO48-C
Inches Millimeters

A Rough Opening (Vent Pipe)
10
254

B
Rough Opening (Height)

MINIMUM FRAMING DIMENSIONS*

C

D

Rough Opening (Depth)

Rough Opening (Width)

42

18-1/4

60-1/4

E
Clearance to Ceiling
31

1067

464

1530

787

F

G

Combustible Combustible

Floor

Flooring

0

0

0

0

MEZZO48-C

MINIMUM FRAMING DIMENSIONS*

H

I

J

Behind Appliance

Sides of Appliance

Front of Appliance

K Clearance to Ceiling

Inches

1

1

48

55-1/2

Millimeters

25

25

1219

1410

* = Adjust framing dimensions for interior sheathing (such as sheetrock) **= Header depth not to exceed 3-1/2 inches. ***= If appliance is installed off of floor, maintain required clearances to combustibles.
Construct platform in accordance with local building codes
Figure 3.10 Clearances to Combustibles-MEZZO36-C, MEZZO48-C,

Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 19

A
CEILING

HEADER DEPTH**
B
C D

F

G

NOTE: Header MUST be installed

on end as shown in diagram.

J

I

E K
H

MEZZO60-C
Inches Millimeters

APPLIANCE MAY BE INSTALLED
OFF OF FLOOR*** NOTE: E & K dimensions will change if Passive Heat option is installed. Reference the instructions included with the Passive Heat Kit for dimensions.

A
Rough Opening (Vent Pipe)
10

MINIMUM FRAMING DIMENSIONS*

B

C

D

E

Rough Opening (Height)

Rough Opening (Depth)

Rough Opening (Width)

Clearance to Ceiling

48

18-1/4

72-1/4

31

F
Combustible Floor
0

G
Combustible Flooring
0

254

1219

464

1835

787

0

0

MEZZO60-C
Inches Millimeters

MINIMUM FRAMING DIMENSIONS*

H

I

J

Behind Appliance

Sides of Appliance

Front of Appliance

1

1

48

25

25

1219

K Clearance to Ceiling
55-1/2
1410

MEZZO72-C
Inches Millimeters

A Rough Opening (Vent Pipe)
10
254

MINIMUM FRAMING DIMENSIONS*

B

C

D

E

Rough Opening (Height)

Rough Opening (Depth)

Rough Opening (Width)

Clearance to Ceiling

48

18-1/4

84-1/4

31

1219

464

2140

787

F Combustible
Floor
0 0

G Combustible
Flooring
0 0

MEZZO72-C Inches

MINIMUM FRAMING DIMENSIONS*

H

I

J

Behind Appliance

Sides of Appliance

Front of Appliance

1

1

48

K Clearance to
Ceiling
55-1/2

Millimeters

25

25

1219

1410

* = Adjust framing dimensions for interior sheathing (such as sheetrock) **= Header depth not to exceed 3-1/2 inches. ***= If appliance is installed off of floor, maintain required clearances to combustibles.
Construct platform in accordance with local building codes

Figure 3.11 Clearances to Combustibles-MEZZO60-C, MEZZO72-C

20 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

E=MEASUREMENT FROM TOP

OF FIREPLACE OPENING

A

TO CEILING

J=MEASUREMENT FROM

BOTTOM OF FIREPLACE

TO CEILING

HEADER

DEPTH**

HEADER DEPTH**

F

E

J

C B

G

NOTE: Header MUST be installed

on end as shown in diagram.

I

H

D

APPLIANCE MAY BE INSTALLED OFF OF FLOOR***
NOTE: E & J dimensions will change if Passive Heat option is installed. Reference the instructions included with the Passive Heat Kit for dimensions.

A
Rough Opening (Vent Pipe)

MINIMUM FRAMING DIMENSIONS*

B

C

D

Rough Opening (Height)

Rough Opening (Depth)

Rough Opening (Width)

in.

10

MEZZO36ST-C

mm

254

42 1067

17

48-1/4

432

1226

in.

10

MEZZO48ST-C

mm

254

42 1067

17

60-1/4

432

1530

MINIMUM FRAMING DIMENSIONS*

H

I

Sides of Appliance

Front or Rear of Appliance

in.

1

MEZZO36ST-C

mm

25

48 1219

in.

1

MEZZO48ST-C

mm

25

48 1219

J Clearance to Ceiling
55-1/2
1410
55-1/2
1410

E Clearance to Ceiling
31 787 31 787

F
Combustible Floor

G
Combustible Flooring

0

0

0

0

0

0

0

0

* = Adjust framing dimensions for interior sheathing (such as sheetrock) **= Header depth not to exceed 3-1/2 inches. ***= If appliance is installed off of floor, maintain required clearances to combustibles.
Construct platform in accordance with local building codes.
Figure 3.12 Clearances to Combustibles-MEZZO36ST-C, MEZZO48ST-C
Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 21

E=MEASUREMENT FROM TOP

A

OF FIREPLACE OPENING TO CEILING

J=MEASUREMENT FROM BOTTOM OF FIREPLACE TO CEILING

HEADER

DEPTH**

HEADER

DEPTH** F

E

J

C B

G NOTE: Header MUST be installed

on end as shown in diagram.

D

I

H

APPLIANCE MAY BE INSTALLED OFF OF FLOOR***
NOTE: E & J dimensions will change if Passive Heat option is installed. Reference the instructions included with the Passive Heat Kit for dimensions.

in. MEZZO60ST-C
mm

A Rough Opening (Vent Pipe)
10
254

MINIMUM FRAMING DIMENSIONS*

B

C

D

Rough Opening (Height)

Rough Opening (Depth)

Rough Opening (Width)

E
Clearance to Ceiling

48

17

72-1/4

31

1219

432

1835

787

F
Combustible Floor
0 0

G
Combustible Flooring
0 0

in.

10

48

17

84-1/4

31

0

0

MEZZO72ST-C

mm

254

1219

432

2140

787

0

0

MINIMUM FRAMING DIMENSIONS*

H

I

Sides of Appliance

Front or Rear of Appliance

in.

1

MEZZO60ST-C

mm

25

48 1219

in.

1

MEZZO72ST-C

mm

25

48 1219

J Clearance to Ceiling
55-1/2 1410 55-1/2 1410

K Clearance to Chase Ceiling (Passive Heat Front & Side Only)
74-1/2 1892
94 2388

* = Adjust framing dimensions for interior sheathing (such as sheetrock) **= Header depth not to exceed 3-1/2 inches. ***= If appliance is installed off of floor, maintain required clearances to combustibles.
Construct platform in accordance with local building codes.
Figure 3.13 Clearances to Combustibles-MEZZO60ST-C, MEZZO72ST-C

22 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

Framing Dimensions - Passive Heat Front Discharge (PH-FRT) Single-Sided or See-Through Front Discharge: Air conveyed into the room through one front discharge slot.

C

CHASE DETAIL

1-1/2 IN. (2 X 4 FRAMING)

ROOM CEILING

2 IN. MIN.

CHASE CEILING (REQUIRED)

A

1/2 IN. X 1/2 IN.

F

WIRE MESH**

WIRE MESH**

TV = PASSIVE HEAT

DISCHARGE OPENING

E D
B

WARNING! Risk of Fire! Wire mesh required on bottom of discharge opening when discharge opening is greater than 3 inches. Secure mesh to top of framing.

APPLIANCE MAY BE INSTALLED OFF OF FLOOR

FRONT DISCHARGE MINIMUM FRAMING DIMENSIONS

A

TRIM KIT*

NO TRIM

B

C

D

E

(PHTRIM)

KIT**

Height of Discharge Opening

Minimum Height of Discharge Opening

Minimum Clearance
to Framing

Width of Discharge Opening

Clearance to Top of Discharge Opening from Bottom of Appliance

Clearance from Bottom of Appliance to Bottom of Discharge
Opening

F
Minimum Clearance Discharge Opening to
Ceiling

MEZZO36-C MEZZO36ST-C

Inches millimeters

3-1/2 89

2

48

36-1/2

74-1/2

72-1/2

51-1/2

51

1219

927

1892

1842

1308

MEZZO48-C

Inches

MEZZO48ST-C millimeters

3-1/2 89

2

48

48-1/2

74-1/2

72-1/2

51-1/2

51

1219

1232

1892

1842

1308

MEZZO60-C MEZZO60ST-C
MEZZO72-C MEZZO72ST-C

Inches millimeters
Inches millimeters

3-1/2 89
3-1/2 89

2

48

60-1/2

74-1/2

72-1/2

51-1/2

51

1219

1537

1892

1842

1308

2

67-1/2

72-1/2

94

92

71

51

1715

1842

2388

2337

1803

* Measurement for Trim Kit = 3-1/2 in. + additional finishing material thickness. Figure 3.15 shows vent cover dimensions. ** Measurement for without trim kit = 2 in. + additional finishing material thickness. If discharge opening is greater than 3 inches, wire mesh is required.
Figure 3.14 Passive Heat Front Discharge Framing Dimensions with Clean Face Finish or Trim Kit

Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 23

Passive Heat Front Discharge (PH-FRT) Trim Kit
Vent Cover Dimensions
CA B D

PHTRIM-36C PHTRIM-48C PHTRIM-60C PHTRIM-72C

Inches millimeters
Inches millimeters
Inches millimeters
Inches millimeters

FRONT DISCHARGE FRAMING DIMENSIONS

A

B

C

Inside Height

Inside Width

Outside Height

2-9/16 65
2-9/16 65
2-9/16 65
2-9/16 65

36-1/2 927
48-1/2 1232 60-1/2 1537 72-1/2 1842

5-5/8 143 5-5/8 143 5-5/8 143 5-5/8 143

D
Outside Width
38-3/8 975
50-3/8 1280 62-3/8 1585 74-3/8 1889

Figure 3.15 Passive Heat Front Discharge - Vent Cover Dimensions 24 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

Framing Dimensions - Passive Heat Side Discharge (PH-SIDE) Single-Sided or See-Through

Side Discharge: Air conveyed into the room through two discharge registers, one on each side of appliance.

E = NON-COMBUSTIBLE ZONE (BOTH SIDES) B

CHASE DETAIL
1-1/2 IN. (2 X 4 FRAMING) CHASE CEILING ZONE ROOM CEILING

CHASE CEILING (REQUIRED)

E

DISCHARGE OPENING

= PASSIVE HEAT DISCHARGE OPENING
A

F D
C

WARNING! Risk of Fire! DO NOT place combustible objects or combustible materials in non-combustible zone. Appliance and combustible materials will overheat.

APPLIANCE MAY BE INSTALLED OFF OF FLOOR

MEZZO36-C MEZZO36ST-C
MEZZO48-C MEZZO48ST-C
MEZZO60-C MEZZO60ST-C
MEZZO72-C MEZZO72ST-C

Inches millimeters
Inches millimeters
Inches millimeters
Inches millimeters

SIDE DISCHARGE FRAMING DIMENSIONS

A

B

C

D

Height of Discharge Opening

Width of discharge Opening

Minimum Clearance Discharge Opening to Ceiling

Minimum Clearance Bottom of Appliance to Ceiling

12-1/4

8-3/4

62-3/4

76-1/2

311 12-1/4
311 12-1/4

222 8-3/4 222 8-3/4

1594 62-3/4 1594 51-1/2

1943 76-1/2 1943 76-1/2

311

222

62-3/4

1943

12-1/4 311

8-3/4 222

81-1/4 2064

95 2413

E
Minimum Clearance to Combustible
Materials
18 457 18 457 18
457
18 457

F Minimum Clearance Discharge Opening to Ceiling
52
1321
52 1321
52
1321
70-1/2 1791

Figure 3.16 Passive Heat Side Discharge Framing Dimensions

Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 25

Framing Dimensions - Passive Heat Open Top Discharge Single-Sided or See-Through Open Top Discharge: Both sides and the top are open allowing air to be conveyed into the room.
WARNING! Risk of Fire! Wire mesh required on bottom of discharge opening when discharge opening is greater than 3 inches. Secure mesh to top of framing.
C A
D B

MEZZO36-C MEZZO36ST-C
MEZZO48-C MEZZO48ST-C
MEZZO60-C MEZZO60ST-C

OPEN TOP DISCHARGE MINIMUM FRAMING DIMENSIONS

A*

B

C

Minimum Height of Clearance Width of Discharge

Discharge Opening to Framing

Opening

Inches

2

millimeters

51

Inches

2

millimeters

51

Inches

2

millimeters

51

48 1219
48 1219
48 1219

36-1/2 927
48-1/2 1232 60-1/2 1537

D Minimum Clearance Discharge Opening to Ceiling
50
1270
50 1270
50
1270

MEZZO72-C

Inches

2

MEZZO72ST-C

millimeters

51

67-1/2 1715

72-1/2 1842

* Wire mesh required for front discharge or open top discharge passive heat installations with discharge
opening of 3 inches or greater.

69-1/2 1765

Figure 3.17 Passive Heat Minimum Framing Dimensions Open Top Discharge

26 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

Framing Dimensions - Ducted Passive Heat Front Discharge (PHFR-MCE) Single-Sided or See-Through
Clearances to Combustibles Ducted Passive Heat Front Discharge Ducted Passive Heat Kit (PHFR-MCE)
Single-Sided or See-Through
B

F

G F

A D
CE

MINIMUM FRAMING DIMENSIONS

MODEL

Ducted Passive Heat
Kit

A
Height of Discharge Opening

FRONT DISCHARGE

B

C

Width of Discharge Opening

Clearance Opening to
Framing

D
Clearance Opening to
Ceiling

E
Clearance Bottom of Appliance
to Ceiling

F Framing

G
2 X 4 Studs

MEZZO36-C MEZZO36ST-C

PHFR-MCE-36

in. mm

6 152

38-3/4 984

50-1/2 1283

53-1/2 1359

78 1981

3-1/2 89

MEZZO48-C MEZZO48ST-C

PHFR-MCE-48

in. mm

6 152

MEZZO60-C MEZZO60ST-C

PHFR-MCE-60

in. mm

6 152

50-7/8 1292 62-3/4 1594

50-1/2 1283 50-1/2 1283

53-1/2 1359 53-1/2 1359

78 1981
78 1981

16 inches (406 mm) on center

3-1/2 89
3-1/2 89

MEZZO72-C MEZZO72ST-C

PHFR-MCE-72

in. mm

6 152

74-3/4 1899

50-1/2 1283

72 1829

96-1/2 2451

3-1/2 89

Figure 3.18 Clearances to Combustibles - Ducted Passive Heat Front Discharge Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 27

Framing Dimensions - Ducted Passive Heat Side Discharge (PHSI-MCE) Single-Sided or See-Through Clearances to Combustibles
Ducted Passive Heat Side Discharge (PHSI-MCE) Single-Sided or See-Through B
F
E A
C D

Note: Not for use with 60 inch and 72 inch models.

MODEL

Ducted Passive Heat
Kit

MEZZO36-C

in.

MEZZO36ST-C

mm

PHSI-MCE

MEZZO48-C

in.

MEZZO48ST-C

mm

MINIMUM FRAMING DIMENSIONS

SIDE DISCHARGE

A

B

C

D

E

Height of Discharge Opening

Width of Discharge Opening

Clearance Opening to
Framing

Clearance Opening to
Ceiling

Clearance Bottom of Appliance
to Ceiling

16

10-3/16

50

52

76-1/2

406

259

1270

1321

1943

16

10-3/16

50

52

76-1/2

406

259

1270

1321

1943

F
2 X 4 Studs
3-1/2 89
3-1/2 89

Figure 3.19 Clearances to Combustibles - Ducted Passive Heat Side Discharge 28 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

C. Constructing the Appliance Chase
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 specified 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 fireplace or chimney.
· Failure to maintain airspace may cause overheating and a fire.
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 firestops and wall shield firestops 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 classified 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 firestops should be sealed with caulk or foil tape with a minimum of 300 ºF continuous exposure rating to seal gaps. Gas line holes and other openings should be sealed with caulk or foil tape with a minimum of 300 ºF continuous exposure rating or stuffed 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 3.20. Reference Figure 4.5 for additional clearances.

Note: Figure 3.10 and Figure 3.11 show the fireplace installed on the floor. However, this fireplace can be elevated off the floor provided that the fireplace is properly supported by framing materials and the ceiling clearances are maintained.

MEZZO36 = 70 IN. MEZZO48 = 70 IN. MEZZO60 = 70 IN. MEZZO72 = 82 IN.

A

3 IN. MIN.

B*

REQUIRED MINIMUM OFF TOP MEZZO36 = 18 IN. MEZZO48 = 18 IN. MEZZO60 = 18 IN. MEZZO72 = 30 IN.
* NOTE: If overhang "A" is less than 2 inches, clearance from top of termination cap to bottom of overhang "B" MUST be a minimum of 4 inches. If A is two inches or greater, see Figure 4.4, "Minimum Clearances for Termination."
Figure 3.20 Exterior Chase - Minimum Height Requirements

Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 29

D. Floor Protection
NOTICE: Install appliance on hard metal or wood surfaces extending full width and depth. DO NOT install directly on carpeting, vinyl, tile or any combustible material other than wood. WARNING! Risk of Fire! Maintain specified 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 fireplace or chimney. · Failure to maintain airspace could cause overheating and fire. Elevated Hearth Systems Some hearth systems will elevate the appliance off the floor at a given dimension. The elevation will also have to be added to the following: Wall penetration referenced in Figure 5.2 (Wall penetration) and Rough Opening Height (header height) referenced in Figure 3.10-3.13. Note: Finished floor thickness should also be considered when determining installation dimensions.
30 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

4 Termination Location and Vent Information

A. Approved Pipe
WARNING! Risk of Fire, Delayed Ignition or Asphyxiation. 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 venting systems. Refer to Section 12.A for vent component information and dimensions.
Only use listed decorative termination caps/shrouds with Hearth & Home Technologies approved venting systems.
DO NOT mix pipe, fittings or joining methods from different 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.

B. Vent Termination Minimum Clearances
WARNING
Fire Risk. Maintain vent clearance to combustibles as specified. · 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 fire.
HORIZONTAL OVERHANG

2 FT. MIN.
GAS DIRECT VENT TERMINATION CAP

20 INCHES MIN. LOWEST
DISCHARGE OPENING

VERTICAL WALL

X 12

ROOF PITCH IS X/ 12
H (MIN.) - MINIMUM HEIGHT FROM ROOF TO LOWEST DISCHARGE OPENING

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

* H minimum may vary depending on regional snowfall. Refer to local codes.

Figure 4.1 Minimum Height From Roof to Lowest Discharge Opening

Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 31

A 6 in. (minimum) up to 20 in.
152 mm/508 mm
20 in. and over

B 18 in. minimum
457 mm
0 in. minimum

Wood or Fuel Oil Termination Cap

B
C
A *
**Gas Termination
Cap

OVERHANG WALL

* If using decorative cap cover(s), this distance may need to be increased. Refer to the installation instructions supplied with the decorative cap cover.
** If two gas terminations are present, they may be level (B = 0 inches) provided A is a minimum of 6 inches.
Figure 4.2 Staggered Termination Caps
CAUTION! Risk of Burns! Termination caps are HOT, consider proximity to doors, traffic 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 Figure 4.4.

H=Measure Horizontal Distances from H

H

V=Measure Vertical Distances from V

H

V

V

C=L6EAINR. ANCE

E
C and E dimensions are defined in Figure 4.5.
Figure 4.4 Measure Horizontal and Vertical Termination Clearance to Trapezoid Portion of Cap

Figure 4.3 32 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

C. Vent Terminal Clearances

C
V JB V

B DV

F

V

B

V A

G M

= AREA WHERE TERMINAL IS NOT PERMITTED

X = AIR SUPPLY INLET V = VENT TERMINAL

H or i

XV

E

H

V

VHV

V

A

V

L

V

K Electrical K
Service

V

C

V

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.

U.S.A.

A Clearance above grade,veranda, porch, deck, or balcony

12 in. (305 mm)

CANADA 12 in. (305 mm)

B

Clearance to window or door that may be opened, or to permanently closed window

U.S.A.: = 12 in. min. (305 mm min.)

CANADA: = 12 in. min. (305 mm min.)

Clearance below unventilated soffit C Clearance below ventilated soffit
Clearance below any vinyl soffits and electrical service D Clearance to outside corner E Clearance to inside corner

18 in. (457 mm) 18 in. (457 mm) 30 in. (762 mm) 6 in. (152 mm) 6 in. (152 mm)

18 in. (457 mm) 18 in. (457 mm) 30 in. (762 mm) 6 in. (152 mm) 6 in. (152 mm)

F

Not to be installed above a gas meter/regulator assembly within 3 feet horizontally from the center-line of the regulator

3 ft (914 mm)

3 ft (914 mm)

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

9 in.

any other appliance termination (mechanical or non-mechanical)

(229 mm min.)

12 in. (305 mm min.)

Clearance to a mechanical (powered) air supply inlet

I

***(All mechanical air intakes within 10 feet of a horizontal termination cap must be 3 ft (914 mm)***

a minimum of 3 feet below termination.)

6 ft (1.8 m)

On public property: clearance above paved sidewalk or a paved driveway.

7 ft (2.1 m)

7 ft (2.1 m)**

J **(A vent shall not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings and serves both dwellings.)

Clearance from sides of electrical service

6 in. (152 mm)

K

Location of the vent termination must not interfere with access to the electrical service.

6 in. (152 mm)

Clearance above electrical service

12 in. (305 mm) 12 in. (305 mm)

L

Location of the vent termination must not interfere with access to the electrical service.

Clearance under veranda, porch, deck, balcony or overhang *(Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of M two sides beneath the floor.)

18 in. (457 mm) 18 in. (457 mm)*

Vinyl or composite overhang

42 in. (1067 mm) 42 in. (1067 mm)

Figure 4.5 Minimum Clearances for Termination Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 33

D. Use of Elbows
Diagonal runs have both vertical and horizontal vent aspects when calculating the effects. 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 offsets for DVP elbows.

RISE

VERTICAL

EFLFEENCGTITVHE RUN

Y

X

Vent Type DVP

Inches 6-5/8

X Millimeters
168

Inches 16-1/2

Y Millimeters
419

X

HORIZONTAL

DVP Pipe
DVP4 DVP6 DVP12 DVP24 DVP36 DVP48 DVP6A DVP12A

Effective Length

Inches Millimeters

4

102

6

152

12

305

24

610

36

914

48

1219

3 to 6 76 to 152

3 to 12 76 to 305

Rise/Run

Inches

Millimeters

2-3/4

70

4-1/4

108

8-1/2

216

17

432

25-1/2

648

34

864

2-1/8-4-1/4 54-108

2-1/8-8-1/2 54-216

Figure 4.6

X

Vent Type DVP

Inches 16-1/4

X Millimeters 413

Figure 4.7 Vertical and Horizontal Offset for DVP Elbows

34 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

E. Vent Diagrams
General Rules:
· 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 configuration. Some elbows may be installed horizontally. See Figure 4.12 and Figure 4.19.
· Elbows may be placed back to back anywhere in the system.
· Any 90º elbow may be replaced with two back to back
45º elbows.
· When penetrating a combustible wall, a wall shield firestop must be installed.
· When penetrating a combustible ceiling, a ceiling firestop must be installed.
· Horizontal runs of vent do not require vertical rise; horizontal runs may be level.
· Horizontal termination cap should have a 1/4 inch downward slant to allow any moisture in cap to be released. See Figure 4.8.

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 effective length of pipe. See Section 12.A (Figure 12.1), for information on effective 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.

1/4 in. max.

(6 mm)

W

A

L

L

MEASURE TO SHADED SURFACE (OUTSIDE MOUNTING SURFACE)
Figure 4.9 Measure to Outside Mounting Surface

Figure 4.8
Figure 4.10 Measure to Top of Last Section of Pipe Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 35

WARNING
Fire Risk. Explosion Risk. Do NOT pack insulation or other combustibles between ceiling firestops. · ALWAYS maintain specified clearances around venting and firestop systems. · Install wall shield and ceiling firestops as specified. Failure to keep insulation or other material away from vent pipe could cause fire.

Top Vent - Horizontal Termination Venting with 1 elbow
WARNING! Risk of Fire! DO NOT attach elbow directly to the appliance. · The MEZZO36-C/MEZZO36ST-C, MEZZO48-C/MEZZO48ST-C and MEZZO60-C/MEZZO60ST-C require a minimum of
18 inches of vertical venting before attaching any elbow to the appliance.
· The MEZZO72-C/MEZZO72ST-C requires a minimum of 30 inches of vertical venting before attaching any elbow to the appliance.

MEZZO36-C, MEZZO48-C, MEZZO60-C

V1 Minimum 1-1/2 ft. 457 mm

H1 Maximum 1-1/2 ft. 457 mm

Note: Use DVP Series components only.

2-1/2 ft. 762 mm

6 ft.

1.8 m

3-1/2 ft. 1.1 m

9 ft.

2.7 m

5 ft.

1.5 m

12 ft.

3.7 m

6 ft.

1.8 m

15 ft.

4.6 m

7 ft.

2.1 m

18 ft.

8 ft.

2.4 m

21 ft.

9 ft.

2.7 m

24 ft.

5.5 m 6.4 m 7.3 m

H1
V1

V1 + H1 = 63 ft. (19.2 m) Maximum H1 = 24 ft. (7.3 m) Maximum

MEZZO36ST-C, MEZZO48ST-C, MEZZO60ST-C

V1 Minimum 1-1/2 ft. 457 mm

2-1/2 ft. 762 mm

3-1/2 ft. 1.1 m

5 ft.

1.5 m

6 ft.

1.8 m

7 ft.

2.1 m

8 ft.

2.4 m

9 ft.

2.7 m

3 ft. 6 ft. 9 ft. 12 ft. 15 ft. 18 ft. 21 ft. 24 ft.

H1 Maximum 914 mm 1.8 m 2.7 m 3.7 m 4.6 m 5.5 m 6.4 m 7.3 m

V1 + H1 = 63 ft. (19.2 m) Maximum H1 = 24 ft. (7.3 m) Maximum

Figure 4.11

MEZZO72-C

V1 Minimum 2-1/2 ft. 762 mm

H1 Maximum 1-1/2 ft. 457 mm

3-1/2 ft. 1.1 m

6 ft.

1.8 m

4-1/2 ft. 1.4 m

9 ft.

2.7 m

6 ft.

1.8 m

12 ft.

3.7 m

7 ft.

2.1 m

15 ft.

4.6 m

8 ft.

2.4 m

18 ft.

5.5 m

9 ft.

2.7 m

21 ft.

6.4 m

10 ft.

3.0 m

24 ft.

7.3 m

V1 + H1 = 63 ft. (19.2 m) Maximum H1 = 24 ft. (7.3 m) Maximum

MEZZO72ST-C

V1 Minimum

H1 Maximum

2-1/2 ft. 762 mm 3-1/2 ft. 1.1 m

3-1/2 ft. 1.1 m

6 ft.

1.8 m

4-1/2 ft. 1.4 m

9 ft.

2.7 m

6 ft.

1.8 m 12 ft.

3.7 m

7 ft.

2.1 m 15 ft.

4.6 m

8 ft.

2.4 m 18 ft.

5.5 m

9 ft.

2.7 m 21 ft.

6.4 m

10 ft. 3.0 m 24 ft. 7.3 m

V1 + H1 = 63 ft. (19.2 m) Maximum H1 = 24 ft. (7.3 m) Maximum

36 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

WARNING! Risk of Fire!

Top Vent - Horizontal Termination Venting with 2 elbows

DO NOT attach elbow directly to the appliance.

· The MEZZO36-C/MEZZO36ST-C, MEZZO48-C/MEZZO48ST-C and MEZZO60-C/MEZZO60ST-C require a minimum of 18 inches of vertical venting before attaching any elbow to the appliance.

· The MEZZO72-C/MEZZO72ST-C requires a minimum of 30 inches of vertical venting before attaching any elbow to the appliance.

MEZZO36-C, MEZZO48-C, MEZZO60-C

V1 Minimum 1-1/2 ft. 457 mm

2-1/2 ft. 762 mm

3-1/2 ft. 1.1 m

5 ft.

1.5 m

6 ft.

1.8 m

7 ft.

2.1 m

8 ft.

2.4 m

9 ft.

2.7 m

H1 + H2 Maximum

1-1/2 ft.

457 mm

6 ft.

1.8 m

9 ft.

2.7 m

12 ft.

3.7 m

15 ft.

4.6 m

18 ft.

5.5 m

21 ft.

6.4 m

24 ft.

7.3 m

Note: Use DVP Series components only.

MEZZO72-C

V1 Minimum 2-1/2 ft. 762 mm

3-1/2 ft. 1.1 m

4-1/2 ft. 1.4 m

6 ft.

1.8 m

7 ft.

2.1 m

8 ft.

2.4 m

9 ft.

2.7 m

10 ft.

3.0 m

H1 + H2 Maximum

1-1/2 ft.

457 mm

6 ft.

1.8 m

9 ft.

2.7 m

12 ft.

3.7 m

15 ft.

4.6 m

18 ft.

5.5 m

21 ft.

6.4 m

24 ft.

7.3 m

V1 + H1 + H2 = 63 ft. (19.2 m) Maximum H1 + H2 = 24 ft. (7.3 m) Maximum

V1 + H1 +H2 = 63 ft. (19.2 m) Maximum H1 + H2 = 24 ft. (7.3 m) Maximum

MEZZO36ST-C, MEZZO48ST-C, MEZZO60ST-C

V1 Minimum 1-1/2 ft. 457 mm

H1 + H2 Maximum

3 ft.

914 mm

2-1/2 ft. 762 mm

6 ft.

1.8 m

3-1/2 ft. 1.1 m

9 ft.

2.7 m

5 ft.

1.5 m

12 ft.

3.7 m

6 ft.

1.8 m

15 ft.

4.6 m

7 ft.

2.1 m

18 ft.

5.5 m

8 ft.

2.4 m

21 ft.

6.4 m

9 ft.

2.7 m

24 ft.

7.3 m

V1 + H1 +H2 = 63 ft. (19.2 m) Maximum H1 + H2 = 24 ft. (7.3 m) Maximum

MEZZO72ST-C

V1 Minimum 2-1/2 ft. 762 mm

3-1/2 ft. 1.1 m

4-1/2 ft. 1.4 m

6 ft.

1.8 m

7 ft.

2.1 m

8 ft.

2.4 m

9 ft.

2.7 m

10 ft.

3.0 m

H1 + H2 Maximum

3-1/2 ft.

1.1 m

6 ft.

1.8 m

9 ft.

2.7 m

12 ft.

3.7 m

15 ft.

4.6 m

18 ft.

5.5 m

21 ft.

6.4 m

24 ft.

7.3 m

V1 + H1 +H2 = 63 ft. (19.2 m) Maximum H1 + H2 = 24 ft. (7.3 m) Maximum

H2

H1

V1

INSTALLED HORIZONTALLY

Figure 4.12 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 37

WARNING! Risk of Fire!

Top Vent - Horizontal Termination Venting with 3 Elbows

DO NOT attach elbow directly to the appliance.

· The MEZZO36-C/MEZZO36ST-C, MEZZO48-C/MEZZO48ST-C and MEZZO60-C/MEZZO60ST-C require a minimum of 18 inches of vertical venting before attaching any elbow to the appliance.

· The MEZZO72-C/MEZZO72ST-C requires a minimum of 30 inches of vertical venting before attaching any elbow to the appliance.

MEZZO36-C, MEZZO48-C, MEZZO60-C

V1 + V2 Minimum 1-1/2 ft. 457 mm

2-1/2 ft. 762 mm

3-1/2 ft. 1.1 m

5 ft.

1.5 m

6 ft.

1.8 m

7 ft.

2.1 m

8 ft.

2.4 m

9 ft.

2.7 m

H1 + H2 Maximum

1-1/2 ft.

457 mm

6 ft.

1.8 m

9 ft.

2.7 m

12 ft.

3.7 m

15 ft.

4.6 m

18 ft.

5.5 m

21 ft.

6.4 m

24 ft.

7.3 m

Note: Use DVP Series components only.

MEZZO72-C

V1 + V2 Minimum 2-1/2 ft. 762 mm

3-1/2 ft. 1.1 m

4-1/2 ft. 1.4 m

6 ft.

1.8 m

H1 + H2 Maximum

1-1/2 ft.

457 mm

6 ft.

1.8 m

9 ft.

2.7 m

12 ft.

3.7 m

7 ft. 8 ft. 9 ft. 10 ft.

2.1 m 2.4 m 2.7 m 3.0 m

15 ft. 18 ft. 21 ft. 24 ft.

4.6 m 5.5 m 6.4 m 7.3 m

V1 + V2 + H1 + H2 = 63 ft. (19.2 m) Maximum H1 + H2 = 24 ft. (7.3 m) Maximum

V1 + V2 + H1 +H2 = 63 ft. (19.2 m) Maximum H1 + H2 = 24 ft. (7.3 m) Maximum

MEZZO36ST-C, MEZZO48ST-C, MEZZO60ST-C

V1 + V2 Minimum 1-1/2 ft. 457 mm

2-1/2 ft. 762 mm

3-1/2 ft. 1.1 m

5 ft.

1.5 m

6 ft.

1.8 m

7 ft.

2.1 m

8 ft.

2.4 m

9 ft.

2.7 m

H1 + H2 Maximum

3 ft.

914 mm

6 ft.

1.8 m

9 ft.

2.7 m

12 ft.

3.7 m

15 ft.

4.6 m

18 ft.

5.5 m

21 ft.

6.4 m

24 ft.

7.3 m

V1 + V2 + H1 + H2 = 63 ft. (19.2 m) Maximum H1 + H2 = 24 ft. (7.3 m) Maximum

MEZZO72ST-C

V1 + V2 Minimum 2-1/2 ft. 762 mm

3-1/2 ft. 1.1 m

4-1/2 ft. 1.4 m

6 ft.

1.8 m

7 ft.

2.1 m

8 ft.

2.4 m

9 ft.

2.7 m

10 ft.

3.0 m

H1 + H2 Maximum

3-1/2 ft.

1.1 m

6 ft.

1.8 m

9 ft.

2.7 m

12 ft.

3.7 m

15 ft.

4.6 m

18 ft.

5.5 m

21 ft.

6.4 m

24 ft.

7.3 m

V1 + V2 + H1 +H2 = 63 ft. (19.2 m) Maximum H1 + H2 = 24 ft. (7.3 m) Maximum

H2 V2

H1
V1

Figure 4.13 38 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

Top Vent - Vertical Termination No Elbows V = 2-1/2 ft Min. (762 mm), 50 ft. Max. (15.2 m)
Note: If installing a vertical vent/termination off the top of the appliance, the optional exhaust restrictor may be needed.
Note: Use DVP Series components only.
V
Figure 4.14 Vertical Vent Maximum Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 39

Exhaust restrictor Instructions
Exhaust restrictors are recommended for these vertically terminated products which have excessive draft. Exhaust restrictors will compensate for high draft, and restore visual flame height. If the vent configuration has a total vertical of 20-50 feet, the included exhaust restrictor may be needed.
Exhaust restrictor: MEZZO36-C, MEZZO48-C, MEZZO60-C, MEZZO72-C
1. Locate the two pilot holes in the inside firebox chamber as shown in Figure 4.15.
2. Break the flue restrictor into two pieces. Do this by bending the part back and forth until it breaks. See Figure 4.16.
3. The setting for MEZZO36-C, MEZZO48-C, MEZZO60-C and MEZZO72-C is a 2.5 inch setting, or 2-2. Align the holes marked "2" on the numbered exhaust restrictor piece with the hole on the other exhaust restrictor piece. See Figure 4.17. Align the exhaust restrictor pieces with the pilot holes in the inner firebox chamber. Use two 1/2 inch self-piercing screws to secure vent restrictor to firebox heat shield.
4. In some applications, such as those where the fireplace is elevated off the floor, the exhaust restrictor may be painted, but painting is not required.

PILOT HOLES EXHAUST RESTRICTOR
Figure 4.15 Exhaust Restrictor

NOTICE: Before painting, contact your dealer for information on the appropriate high temperature paint.
Exhaust restrictor: MEZZO36ST-C, MEZZO48ST-C
MEZZO60ST-C, MEZZO72ST-C
1. Break the flue restrictor into two pieces. Do this by bending the part back and forth until it breaks. See Figure 4.16.
Note: The MEZZO36ST-C, MEZZO48ST-C, MEZZO60ST-C, and MEZZO72ST-C do not have pilot holes for the exhaust restrictor in the firebox chamber.
2. The setting for MEZZO36ST-C, MEZZO48ST-C, MEZZO60ST-C, and MEZZO72ST-C is a 2.5 inch setting, or 2-2. Align the holes marked "2" on the numbered exhaust restrictor piece with the hole on the other exhaust restrictor piece. See Figure 4.17. Center the exhaust restrictor on the vent and secure in place with two 1/2 inch self-piercing screws.
3. In some applications, such as those where the fireplace is elevated off the floor, the exhaust restrictor may be painted, but painting is not required.
NOTICE: Before painting, contact your dealer for information on the appropriate high temperature paint.

BREAK HERE
Figure 4.16 Break the Exhaust Restrictor
1 2 3 45
SETTING
1 2 3 45
Figure 4.17 Set the Exhaust Restrictor

40 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

Top Vent - Vertical Termination Venting with 2 elbows

WARNING! Risk of Fire!
DO NOT attach elbow directly to the appliance.
· The MEZZO36-C/MEZZO36ST-C, MEZZO48-C/MEZZO48ST-C and MEZZO60-C/MEZZO60ST-C require a minimum of 18 inches of vertical venting before attaching any elbow to the appliance.
· The MEZZO72-C/MEZZO72ST-C requires a minimum of 30 inches of vertical venting before attaching any elbow to the appliance.

MEZZO36-C, MEZZO48-C, MEZZO60-C MEZZO36ST-C, MEZZO48ST-C, MEZZO60ST-C

V1 + V2 Minimum 1-1/2 ft. 457 mm

H Maximum

4 ft.

1.2 m

2-1/2 ft. 762 mm

9 ft.

2.7 m

3-1/2 ft. 1.1 m

12 ft.

3.7 m

5 ft.

1.5 m

15 ft.

4.6 m

V1 + H1 + V2 = 63 ft. (19.2 m) Maximum HTotal = 23 ft. (7.1 m) Maximum

Note: Use DVP Series components only.

MEZZO72-C, MEZZO72ST-C

V1 + V2 Minimum 2-1/2 ft. 762 mm

3-1/2 ft. 1.1 m

4-1/2 ft. 1.4 m

6 ft.

1.8 m

H Maximum

4 ft.

1.2 m

9 ft.

2.7 m

12 ft.

3.7 m

15 ft.

4.6 m

V1 + H1 + V2 = 63 ft. (19.2 m) Maximum HTotal = 23 ft. (7.1 m) Maximum

V2
H1
V1

Figure 4.18 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 41

Top Vent - Vertical Termination Venting with 3 elbows

WARNING! Risk of Fire!
DO NOT attach elbow directly to the appliance.
· The MEZZO36-C/MEZZO36ST-C, MEZZO48-C/MEZZO48ST-C and MEZZO60/MEZZO60ST-C require a minimum of 18 inches of vertical venting before attaching any elbow to the appliance.
· The MEZZO72-C/MEZZO72ST-C requires a minimum of 30 inches of vertical venting before attaching any elbow to the appliance.

MEZZO36-C, MEZZO36ST-C MEZZO48-C, MEZZO48ST-C MEZZO60-C, MEZZO60ST-C

V1 + V2 Minimum H1 + H2 Maximum

1-1/2 ft. 457 mm

4 ft.

1.2 m

3 ft.

914 mm

9 ft.

2.7 m

4 ft.

1.2 m

12 ft.

3.7 m

5 ft.

1.5 m

15 ft.

4.6 m

V1 + V2 + H1 + H2 = 63 ft. (19.2 m) Maximum H1 + H2 = 23 ft. (7.1 m) Maximum

Note: Use DVP Series components only.

MEZZO72-C, MEZZO72ST-C

V1 + V2 Minimum 2-1/2 ft. 762 mm

4 ft.

1.2 m

5 ft.

1.5 m

6 ft.

1.8 m

H1 + H2 Maximum

4 ft.

1.2 m

9 ft.

2.7 m

12 ft.

3.7 m

15 ft.

4.6 m

V1 + V2 + H1 + H2 = 63 ft. (19.2 m) Maximum H1 + H2 = 23 ft. (7.1 m) Maximum

V2

H1 H2

INSTALLED HORIZONTALLY

vV11

Figure 4.19 42 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

5 Vent Clearances and Vent Framing
A. Vent Clearances to Combustibles
WARNING! Risk of Fire! Maintain air space clearance to vent. DO NOT pack insulation or other combustibles:
· Between ceiling firestops · Between wall shield firestops · Around vent system
Failure to keep insulation or other material away from vent pipe could cause overheating and fire.

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.
(DVP Pipe Shown)

3 in. (76 mm) top clearance
1 in. (25 mm) clearance around vertical sections

Heat Shield

3 in. (76 mm) top clearance *
Heat Shield

Wall Shield Firestop

1 in. (25 mm) clearance bottom & sides

WALL

Figure 5.1 Horizontal Venting Clearances To Combustible Materials

Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 43

B. Wall Penetration Framing/Firestops
Combustible Wall Penetration
Whenever a combustible wall is penetrated, you must frame a hole for the wall shield firestop(s). The wall shield firestop maintains minimum clearances and prevents cold air infiltration.
· 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 firestop 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 firestop is required on one side only on interior walls. If your local inspector requires a wall shield firestop on both sides, then both wall shield firestops must have a heat shield (refer to Section 12.A.) attached to them.
· See Section 7.F. for information for regarding the installation of a horizontal termination cap.
Non-Combustible Wall Penetration
If the hole being penetrated is surrounded by non-combustible 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 firestop is only required on one side and no heat shield is necessary.

DO NOT PACK VENT FRAMING HOLE WITH INSULATION OR OTHER MATERIAL.

10 in.

12 in.
B

A

MODEL MEZZO36-C MEZZO36ST-C MEZZO48-C MEZZO48ST-C MEZZO60-C MEZZO60ST-C
MEZZO72-C MEZZO72ST-C

A* 64 in.

B 63 in.

1.63 m

1.60 m

76 in. 1.93 m

75 in. 1.90 m

* Shows center of vent framing hole for top venting. The center of the hole is one (1) in. (25.4 mm) above the center of the horizontal vent pipe.
Note: Measurements for MEZZO36-C/MEZZO48-C and MEZZO60-C were taken with an 18 inch vertical section of pipe directly off the top of appliance. Measurements for MEZZO72-C were taken with an 30 inch vertical section of pipe directly off the top of appliance.
Note: Center of the horizontal vent pipe to the vertical measuring surface of a trap cap is 5 inches (127 mm).
Figure 5.2 Wall Penetration

44 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

C. Ceiling Firestop/Floor Penetration Framing
WARNING! Risk of Fire! DO NOT pack insulation around the vent. Maintain clearances to vent to prevent overheating.
A ceiling firestop MUST be used between floors and attics.
· DVP pipe only - Frame an opening 10 in. by 10 in. (254 mm by 254 mm) whenever the vent penetrates a ceiling/floor (see Figure 5.3).
· Frame the area with the same sized lumber as used in ceiling/floor joist.
· The ceiling firestop may be installed above or below the ceiling joists when installed with an attic insulation shield. It must be under joists between floors that are not insulated. Refer to Figure 5.4.
· Secure with two fasteners on each side.

ATTIC ABOVE A

A

PIPE DVP

A 10 in. (254 mm)

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 fire.
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 specified 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.

Figure 5.3 Installing Ceiling Firestop
INSTALL ATTIC INSULATION SHIELDS BEFORE OR AFTER INSTALLATION OF VENT SYSTEM

CEILING FIRESTOP INSTALLED BELOW CEILING
Figure 5.4 Installing the Attic Shield

CEILING FIRESTOP INSTALLED ABOVE CEILING

Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 45

6 Appliance Preparation
CAUTION! Risk of Cuts, Abrasions or Flying Debris. Wear protective gloves and safety glasses during installation. Sheet metal edges are sharp.
A. Top Standoff Preparation

1. Rotate the four (4) top standoffs up into vertical position.

60 and 72 only: Push the standoff support tab on each standoff toward the center of the appliance and fasten it in place using the supplied screw and pilot hole. See Figure 6.1.

TOP STANDOFFS STANDOFFS DOWN

STANDOFFS UP

LOCATION FOR INSTALLATION OF FIBERGLASS ROPE RING

Standoff Shipping Position

Standoff Installation Position

Figure 6.1 Standoffs Shown in Vertical Position (See-Through Appliance Shown)

2. Place a vent section on the starting collar.

WARNING! Risk of Fire! DO NOT attach elbow directly to the appliance.
· The MEZZO36-C/MEZZO36ST-C, MEZZO48-C/ MEZZO48ST-C and MEZZO60-C/MEZZO60ST-C require a minimum of 18 inches of vertical venting before attaching any elbow to the appliance.
· The MEZZO72-C/MEZZO72ST-C requires a minimum of 30 inches of vertical venting before attaching any elbow to the appliance.
4.Place the 1/8 inch thick, square fiberglass gasket over the initial vent section.
5.Place the fiberglass rope ring over the gasket. Ensure both the gasket and the rope ring are seated on the top of the appliance. See Figure 6.2 and Figure 6.3.

Figure 6.2 Location of Fiberglass Rope Ring

GASKET

ROPE RING

Figure 6.3 Fiberglass Rope Ring Installed

46 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

B. Prepare For Heat Management
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 qualified service technician at the time of the appliance installation. Follow the instructions shipped with the kit for installation and operation.
NOTICE: Additional clearances are required for heat management systems installations. Provisions must be made in advance to ensure fit within the framing.
· Determine the heat management system(s) that will be installed.
· Remove the appropriate knockout(s).
· Remove insulation plug(s).
· Center the duct collar around the exposed hole and attach it to the appliance. See Figure 6.5.
Note: Do this BEFORE final positioning of the appliance.
· Determine the location for the air register/fan housing assembly.
Reference the appropriate instructions included with the heat management system kit for the remaining installation steps.
Optional Heat Management Systems are:
· HEAT-ZONE®-GAS: The heat is diverted into an adjacent room.
· HEAT-OUT-GAS: The heat is diverted outside the home/building.
· Passive Heat (PH-FRT, PH-SIDE): The heat is vented into the room in which the appliance is installed through a discharge opening(s).
· Ducted Passive Heat (PHFR-MCE, PHSI-MCE) The heat is ducted into the room in which the appliance is installed through a discharge opening(s) using an insulated ducting system. PHSI-MCE side discharge available only for 36 and 48 inch sized appliances.

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 heat management knockout unless a heat management System will be connected at that location. Overheating of appliance and combustible materials will occur.
PASSIVE HEAT, HEAT-OUT-GAS* OR HEAT-ZONE-GAS*
PASSIVE HEAT ONLY PASSIVE HEAT HEAT-OUT-GAS* OR HEAT-ZONE-GAS*
*Note: Remove only one of the outside knockouts if installing
the HEAT-OUT-GAS or HEAT-ZONE-GAS. The other knockout is removed only if another heat management system is installed. Figure 6.4
Heat-Zone-Gas Adapter Kit (HZLIN-ADP) The HZLIN-ADP adapter kit is required for use with the Heat-Zone-Gas Kit and is necessary when the optional Heat-Zone-Gas Kit is installed on the MEZZO-C models. See Figure 6.5.

The MEZZO-C models may utilize two Heat Management Systems, but not all are compatible.

Approved combinations are:

· HEAT-OUT-GAS: May be used with one HEAT-ZONEGAS or one of the Passive Heat options (PH-FRT, PHSIDE, PHFR-MCE, PHSI-MCE).

· HEAT-ZONE-GAS: May be used with one HEAT-ZONEGAS, one of the Passive Heat options (PH-FRT, PHSIDE, PHFR-MCE, PHSI-MCE), or one additional HEAT-ZONE-GAS.

· Passive Heat (PH-FRT, PH-SIDE, PHFR-MCE, PHSIMCE): May be used with HEAT-ZONE-GAS or one HEAT-OUT-GAS. The dedicated knockouts must be used only as indicated in Figure 6.4.

Figure 6.5 Heat-Zone-Gas Linear Adapter Collar

Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 47

C. Securing and Leveling the Appliance
Setting the Fireplace into the Framing
The left and right nailing tabs were designed as a means to ensure the fireplace is mounted flush with the framing materials. See Figures 6.6-6.8.
1. The shipping flanges protrude further out from the appliance than the side standoffs. The shipping flange may be bent upward or broken off in order to place the appliance into position in the framing.
2. Bend out all nailing tabs. The see-through model will have eight nailing tabs. The single-sided model will have four nailing tabs.
3. Screw each nailing tab to the adjoining framing material. Ensure that the one inch air space clearance is maintained on the sides and back of the fireplace. See Figures 3.8-3.12 for framing and clearance details.

1 IN. STANDOFF
NAILING TAB

NAILING TAB

SHIPPING FLANGE

SHIPPING FLANGE

Figure 6.6 Nailing Tabs Shipping Position

Figure 6.7 Nailing Tabs Installation Position

Securing and Leveling the Appliance
WARNING
Risk of Fire!
Prevent contact with: · Sagging or loose insulation · Insulation backing or plastic · Framing and other combustible materials
DO NOT remove standoffs or notch the framing around the appliance standoffs.
Failure to maintain air space clearance could cause overheating and fire.
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 position and secure the appliance. See Figure 6.8. 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 flush with the framing.
· Level the appliance from side to side and front to back.
· 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 floor by inserting two screws through the pilot holes at the bottom of the appliance.
Some figures in manual show the fireplace installed on the floor. However, this fireplace can be elevated off the floor provided that the fireplace is properly supported by framing materials and the ceiling clearances are maintained.

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NAILING TABS BOTH SIDES
Figure 6.8 Proper Positioning and Securing of an Appliance

D. Installing Non-Combustible Facing Material
WARNING! Risk of Fire! · Follow these instructions exactly. · Facing materials must be installed properly to prevent
fire. · No materials may be substituted without authorization
by Hearth & Home Technologies.
· Remove protective cardboard sleeve from noncombustible facing pieces, which are included with the appliance.
· Install non-combustible facing material to the appliance using the 1-1/4 inch screws supplied in the manual bag assembly. There may be extra screws included.
· Attach top board to the framing members with regular sheetrock screws or nails. See Figure 6.9.
· Attach left and right side pieces to framing members with regular sheetrock screws or nails.
· Use a wet or dry towel or soft brush to remove dust or dirt from facing material.
· See Section 10 for finishing materials guidelines.

Figure 6.9 Install Factory-Included Non-Combustible Facing Material
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7 Venting
A. Assemble Vent Sections (DVP Pipe Only)
WARNING! Risk of Fire or Explosion! Vent sections MUST be installed correctly. Improperly installed vent sections could leak or cause appliance to overheat.
Attach Vent to the Firebox Assembly
Note: The end of the pipe sections with the lanced tabs will face toward the appliance. Attach the first 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 confirm it has locked.
Requirement for Commercial, Multi-family (Multi-level exceeding two stories), or High-Rise Applications
WARNING! Risk of Fire or Explosion! DO NOT break silicone seals on slip sections. Use care when removing termination cap from slip pipe. If slip section seals are broken during removal of the termination cap, vent could leak.
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 flues shall be sealed in this manner, unless otherwise stated.

Assemble Pipe Sections
Per Figure 7.2:
· Start the inner pipe on the lanced end of section A into the flared 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 firmly until all lanced tabs lock into place.
· Lightly tug on the pipe to confirm 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 flue 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.

Figure 7.1 High Temperature Silicone Sealant

A

Lances

B
Figure 7.2

Figure 7.3

50 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

Note: Make sure that the seams are not aligned to prevent unintentional disconnection.

B. Assemble Slip Sections
· Slide the inner flue of the slip section into the inner flue of the pipe section and the outer flue of the slip section over the outer flue of the pipe section. See Figure 7.5.
· Slide together to the desired length.

CORRECT

Figure 7.4 Seams

INCORRECT

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 flue is not required.
· All unit collar, pipe, slip section, elbow and cap outer flues shall be sealed.

Pilot hole
Figure 7.5 Slip Section Pilot Holes
· 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 7.6.

Figure 7.6 Screws into Slip Section
· Continue adding pipe as necessary following instructions in "Assembling Pipe Sections."
NOTICE: If slip section is too long, the inner and outer flues of the slip section can be cut to the desired length.

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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 installation instructions. DO NOT allow vent to sag below connection point to appliance.
· Vertical runs originating off the top of the appliance, with no offsets, must be supported every 8 feet (2.44 m) after the maximum allowed 25 feet (7.62 m) of unsupported rise.
· Vertical runs originating off 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 7.7 and 7.8.
· Wall shield firestops may be used to provide horizontal support to vent sections.
· SLP ceiling firestops have tabs that may be used to provide vertical support.

D. Disassemble Vent Sections
· Rotate either section (see Figure 7.9) so the seams on both pipe sections are aligned as shown in Figure 7.10.
· Pull carefully to separate the pieces of pipe.
Figure 7.9 Rotate Seams for Disassembly

120º

Figure 7.7 Securing Vertical Pipe Sections
120º

Figure 7.10 Align and Disassemble Vent Sections

Figure 7.8 Securing Horizontal Pipe Sections 52 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

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 flashing over the pipe sections extending through the roof as shown in Figure 7.13.
· Use an elastomeric or silicone sealant with a minimum of 150 ºF temperature rating to seal the metal roof flashing.
Note: When installing a silicone or EPDM pipe flashing 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 recommendations when installing the boot. Climate regions with frequent temperatures below - 50 °F (-45.6 °C) should use a silicone flashing boot.
NOTICE: Failure to properly seal the roof flashing and pipe seams could permit entry of water. · Seal the gap between the roof flashing and the outside
diameter of the pipe.
· Seal the perimeter of the flashing where it contacts the roof surface. See Figure 7.11.
· Seal the exposed pipe section seams that are located above the roof.

Assemble and Install Storm Collar
CAUTION! Risk of Cuts, Abrasions or Flying Debris. Wear protective gloves and safety glasses during installation. 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.
Figure 7.12 Insert Bolt into Brackets
· Slide the assembled storm collar down the pipe section until it rests on the roof flashing. See Figure 7.12.
· Tighten nut and make sure the collar is tight against the pipe section.
· Seal around the top of the storm collar. See Figure 7.13.

SEAL

Figure 7.11

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Install Vertical Termination Cap
· Attach the vertical termination cap by sliding the inner collar of the cap into the inner flue of the pipe section while placing the outer collar of the cap over the outer flue 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 flue of the pipe. See Figure 7.13.
TERMINATION CAP

(1 OF 3) SCREWS
SEAL
Figure 7.13

STORM COLLAR

F. Horizontal Termination Requirements
Heat Shield Requirements for Horizontal Termination
WARNING! Risk of Fire! To prevent overheating and fire, heat shields must extend through the entire wall thickness.
· DO NOT remove the heat shields attached to the wall shield firestop and the horizontal termination cap (shown in Figure 7.14).
· Heat shields must overlap 1-1/2 in. (38 mm) minimum.
There are two sections of the heat shield. One section is factory-attached to the wall shield firestop. The other section is factory-attached to the cap. See Figure 7.14.
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 firestop must be trimmed. A minimum 1-1/2 in. (38 mm) overlap MUST be maintained.
· Use an extended heat shield if the finished wall thickness is greater than 7-1/4 in. (184 mm).
· The extended heat shield may need to be cut to length maintaining sufficient 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 diagrams in the back of this manual.
· Rest the small leg on the extended heat shield on top of the pipe section to properly space it from the pipe section.
Important Notice: Heat shields may not be field constructed.

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Install Horizontal Termination Cap (DVP and SLP Pipe)
WARNING! Risk of Fire! The telescoping flue section of the termination cap MUST be used when connecting vent.
· 1-1/2 (38 mm) minimum overlap of flue telescoping section is required.
Failure to maintain overlap could cause overheating and fire.
· 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 ANSIZ223.1 and CAN/CGA-B149 installation codes and refer to Section 4 of this manual.
CAUTION! Risk of Burns! Local codes may require installation 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 flashing kit and HRC caps are available. When penetrating a brick wall, a brick extension kit is available for framing the brick.
Note: When using termination caps with factory-supplied heat shield attached, no additional wall shield firestop is required on the exterior side of a combustible wall.

WALL SHIELD FIRESTOP

HEAT SHIELD OR EXTENDED
HEAT SHIELD

HEAT SHIELD 1-1/2 IN. (38 MM) MIN.
OVERLAP

SLIP SECTION CAN BE EXTENDED

INNER VENT OUTER VENT

INTERIOR

SHEATHING EXTERIOR

Figure 7.14 Venting Through the Wall

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8 Electrical Information
A. General Information
WARNING! Risk of Shock! DO NOT wire 110-120 VAC to the ignition module or to the appliance wall switch. (IPI) 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 CSAC22.1. · 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 (IntelliFire® ignition). · 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 fireplace may cause intermittent, non-damaging, interference during the lighting sequence with a TV plugged into the same circuit. It is recommended that the fireplace and TV use different circuits to mitigate the interference potential. If interference is occurring on the same circuit, the use of surge protectors may help alleviate the interference.
56 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

Junction Box Installation
WARNING! Risk of Shock! Label all wires prior to disconnection when servicing controls. Wiring errors can cause improper and dangerous operation. Verify proper operation after servicing. 1. Remove bottom panel by removing two screws. Screw
locations are shown in Figure 8.1. After removing two screws, gently lift the panel and pull forward, avoiding contact with the non-combustible board if possible. 2. Remove insulation. 3. Remove screws on left and right sides of component heat shield and lift it out of the control cavity. See Figure 8.3 for location of component heat shield screws. 4. Remove the one screw that secures the junction box to the control tray panel. See Figure 8.2.
BBOOTTTTOOMMGPLAANSESL SHIELD
BOTTOM PANEL SCREW LOCATIONS
Figure 8.1 Bottom Panel Location

5. Route the wire through the strain relief in the outer wrap and up through the cutout located on the metal tray under the junction box.
6. Make the connection inside the junction box to the 110120V wire. Connect green to the ground nut, black to black, and white to white.
7. To reattach the junction box, insert one end of the junction box in the slot provided and securely screw the other end of the junction box to the control tray panel.
8. Reinstall component heat shield and insulation.
CAUTION! Risk of Overheating! Component heat shield MUST be installed before operating appliance. Electrical components will be damaged.
In the event that the junction box may need to be accessed or installed after finish methods have been applied, access is possible by removing the bottom glass shield.
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
COMPONENT INSULATION
(Behind Component Heat Shield)
RESET SWITCH BATTERY TRAY

ECM

COMPONENT HEAT SHIELD LED DIMMER

SCREW

SCREW
Figure 8.3 Valve Cavity (Lower Access Panel Removed)

ACM

LED POWER SUPPLY JUNCTION BOX

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B. Wiring Requirements
IntelliFire Touch Ignition System Wiring
· 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 (IPI) Wiring Diagram.
· This appliance is equipped with an IntelliFire control valve which operates on a 6 volt system.
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. Batteries tend to corrode over time. 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.

Accessories Requirements
· This appliance ships standard with 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.
The junction box, control module, LED power supply and wall switch receiver can be accessed by removing the bottom glass shield and component heat shield. The decorative barrier front must be removed to access these components. See Figure 8.4.
CAUTION! Risk of Overheating! Component heat shield MUST be installed before operating appliance. Electrical components will be damaged.
CAUTION! Risk of Overheating! DO NOT remove component insulation from top of component heat shield. Electrical components will be damaged.

58 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

NEUTRAL HOT
NEUTRAL HOT

6 VAC TRANSFORMER

FLAME SENSE

IGNITER

RESET SWITCH WIRE 2550-135

RESET SWITCH 2206-298

JUNCTION BOX 110-120 VAC
JUMPER WIRE SEE DETAIL A

TO JUNCTION BOX 110-120 VAC

IFT-RC400 REMOTE CONTROL
DETAIL A JUMPER WIRE

RF MODULE

ORANGE (PILOT)

BLUE WHITE BLACK

RED BLACK
LED DIMMER

GREEN (MAIN)

BLK RED

LED POWER SUPPLY

BROWN

RED BLK
6V DC BATTERY PACK

TO JUNCTION BOX 110VAC
LED LIGHT TRAY (36 INCH MODELS)
LED LIGHT TRAY (48 INCH MODELS)
LED LIGHT TRAY (60 INCH MODELS)
LED LIGHT TRAY (72 INCH MODELS)

Figure 8.4 IntelliFire Touch Wiring Diagram Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 59

9 Gas Information
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 specified and approved parts.
B. Gas Pressure
WARNING
Fire Risk. Risk of Fire! Risk of Explosion! Incorrect pressure will damage valve. · Isolate gas supply piping BEFORE pressure
testing gas line at test pressures above 1/2 psig. · Close the manual shutoff valve BEFORE pressure testing gas line at test pressures equal to or less than 1/2 psig.
· 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:

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 qualified 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 fitter).
Note: A listed (and Commonwealth of Massachusetts approved) 1/2 in. (13 mm) T-handle manual shut-off valve and flexible 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.
C. Gas Service Access
Note: This appliance does include a manual gas shutoff valve that is located in the valve compartment. This manual gas shutoff valve is accessible for service by removing the decorative barrier front and the bottom glass shield. The valve is most accessible if it is located forward in the control cavity of the appliance.
Depending upon local code, an additional manual gas shutoff, in a readily accessible area may be required and located upstream from the appliance.
The bottom panel is removable if finishing material is not installed. See Figure 9.2.

Gas Pressure Minimum inlet pressure Maximum inlet pressure Manifold pressure

Natural Gas 5.0 in. w.c. 10.0 in. w.c. 3.5 in. w.c.

Propane 11.0 in. w.c. 13.0 in. w.c. 10.0 in. w.c.

· 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.
· Valve pressure taps are accessible by removing the decorative barrier front and the bottom glass shield.

BBOOTTTTOOMMGPLAANSESL SHIELD BOTTOM PANEL SCREW LOCATIONS

Figure 9.2 Bottom Glass Shield and Bottom Panel Location

VALVE PRESSURE TAPS
Figure 9.1 Valve Pressure Taps

If the finishing materials have been installed around the appliance opening, proceed as follows:
1. Remove bottom glass shield.
2. Remove screws on left and right sides of component heat shield and lift it out of the control cavity.
CAUTION! Risk of Overheating! Component heat shield MUST be installed before operating appliance. Electrical components will be damaged.

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3. Unplug the 6V transformer from the junction box. This will turn the power off to the appliance.
4. Turn the gas shutoff handle to the "OFF" position to shut off the gas supply.
If additional access is needed, proceed as follows:
5. Remove glass assembly from appliance by unlatching the top spring latches from the glass frame and lifting glass frame assembly out of the bottom bracket.
6. Remove interior media and refractory from the appliance if already installed.
7. Remove the media tray. It is attached to the interior firebox bottom with eight screws. See Figure 9.3.
8. Remove the two screws that attach the pilot to the burner.
9. Remove the four screws securing the burner to the firebox sides and disengage burner from orifice. Remove burner. See Figure 9.3.
10. Remove the eight screws that secure the glass window. Remove the glass window. Handle with care. See Figure 9.4.
11. Remove light tray from appliance by lifting up and out through the bottom glass opening.
PILOT SHIELD MEDIA TRAY

Figure 9.4 Gas and Electrical Access - Remove Glass Window

BURNER 36 BURNER 48

GAS VALVE GAS ACCESS
Figure 9.5 Gas Fitting Access with Bottom Glass Shield Removed

BURNER 60

BURNER 72

Figure 9.3 Media Tray with Burner and Pilot Shield Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 61

D. Gas Connection
· Refer to Section 3 for location of gas line access in appliance.
· Gas line may be run through the left side of appliance.
· 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 stuffed with non-combustible, unfaced insulation to prevent cold air infiltration.
· 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 shutoff 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 flames.
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 fittings and connections with a non-corrosive commercially available leak-check solution. DO NOT use open flame. Fittings and connections could have loosened during shipping and handling.

E. 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 certified 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 orifice size.

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F. Air Shutter Setting
WARNING! Risk of Explosion or Delayed Ignition! Improperly adjusted air shutter could cause soot buildup.
NOTICE: If sooting occurs, provide more air by opening the air shutter.
Air shutter settings may be adjusted by a qualified installer at the time of installation. The air shutter is set at the factory for minimum vertical vent run. Adjust air shutter for longer vertical runs. See Figure9.6.
Air shutter settings should be adjusted by a qualified service technician at the time of installation. The air shutter is set at the factory for a typical horizontal termination through a 2 X 6 wall. See Figure 4.11 Top Vent - Horizontal Termination With One Elbow.
· Refer to Gas Service Access instructions in Section 9.C to access the air shutter.
· Loosen the 1/4 in. screw.
· Twist shutter to adjust.
· Shutter may be open for longer horizontal vent runs.
· Do not close the air shutter more than 1/16 in. for NG or 1/4 in. for propane.
· Tighten the screw.
Shutter Setting Verification / Flame Appearance · After 15 minutes, the flames will be a yellow/blue mix.
The front flames may be blue at this time.
· After 30 minutes, the flames should be yellow with some blue flames near the burner ports.
· After 1 hour, the flame will be at its maximum maturity.

Air Shutter Settings
MEZZO36-C MEZZO36ST-C
MEZZO48-C MEZZO48ST-C
GLASS REFRACTORY KIT
LOG KIT

NG
Standard Opening=
3/16 in. 1/4 in.

MEZZO60-C MEZZO60ST-C
GLASS REFRACTORY KIT
LOG KIT

NG
Standard Opening=
3/8 in. 3/8 in.

MEZZO72-C MEZZO72ST-C
GLASS REFRACTORY KIT
LOG KIT

NG
Standard Opening=
1/2 in. 1/2 in.

Propane
Standard Opening= Full Open Full Open
Propane Standard Opening= Full Open Full Open
Propane Standard Opening= Full Open Full Open

NOTICE: Flames should not appear orange or stretch to the top of the firebox. If flames are dark orange with dark, smoky tips, provide more primary air to the burner by opening the air shutter accordingly.

DETAIL

Figure 9.6 Air Shutter Location Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 63

10 Finishing
A. Facing Material
WARNING
Risk of Fire!
DO NOT apply combustible materials beyond the minimum clearances. Comply with all minimum clearances to combustibles as specified in this manual. Materials overlapping into non-combustible zones could ignite and will interfere with air flow through decorative barrier fronts.
· Metal front of appliance may be covered with noncombustible materials only, excluding lower cover panel. See Figure 10.1.
· Facing and/or finishing materials must not interfere with air flow 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 finished wall and appliance top and sides using a 300 ºF minimum sealant. Refer to Figure10.1.
NOTICE: Surface temperatures around the appliance will become warm while the appliance is in operation. Ensure finishing materials used for all surfaces (floor, walls, mantels, etc.) will withstand temperatures up to 190°F.
WARNING! Risk of Fire! Comply with all minimum clearances to combustibles as specified. Framing closer than the minimums listed must be constructed entirely of noncombustible materials (i.e., steel studs, concrete board, etc.).
Splatter Guard
The splatter guard is a piece of corrugated material used to protect the appliance during the installation process before finishing work on the whole hearth is complete. A splatter guard is factory-installed on MEZZO-C models. Splatter guards must be removed before appliance is fired.
WARNING! Risk of Fire! Remove the splatter guard before lighting the appliance. Shut off gas to the appliance when the splatter guard is in place to prevent accidental operation.

Finishing Instructions
It is important to follow the framing and finishing instructions to ensure proper placement of fireplace into the surrounding framing/finishing materials.
Wall sheathing materials 1/2 in. thick are specified in this installation manual to properly align with the factoryincluded non-combustible material.
WARNING! Risk of Fire! Factory-included non-combustible board MUST be installed. DO NOT remove or cover it with combustible material, such as:
· Drywall (gypsum board)
· Plywood
· Materials that do not meet the ASTM E 136 Non-combustibility standard (below).
Removal of installed, non-combustible board and/or use of materials not meeting the ASTM E 136 standard could cause fire.
Non-Combustible Materials Specification
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.
WARNING! Risk of Fire! Maintain specified air space clearances to combustibles. Inadequate air space could cause overheating and fire.
Finishing Materials
NOTICE: The maximum finishing material not only includes the decorative finish materials (marble, tile, slate, etc) but also the thin set, lath, and adhesive used to attach the decorative finish material.
NOTICE: Hearth & Home Technologies recommends using multiple pieces of decorative finish material around the opening of the appliance to reduce the chances of the material cracking. A single piece of decorative finish material (such as marble or granite) is more susceptible to cracking due to uneven heating and cooling which causes temperature differentials within the material itself. The use of multiple pieces will reduce the temperature differentials in each piece and reduce the likelihood of cracks. In addition to using multiple pieces of decorative finish material, the installation of the Passive Heat optional heat management system will also reduce the chances of cracking.

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 B. Drywall Installation
Introduction
If the desired finished fireplace installation does not utilize non-combustible finishing materials (such as tile, marble, stone, etc.), special attention must be paid to the installation of drywall/gypsum wallboard to the side joints of the non-combustible board 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.
Attaching Non-Combustible Board When finishing the wall around the fireplace, it is critical that wall sheathing be fastened properly. Wall sheathing fasteners, such as screws or nails, are not permitted in some locations. See Figure 10.1.
It is acceptable to pre-drill holes and use self-tapped screws in the factory-included non-combustible board which may be used to lathe (a backer for tile, marble, etc.). Screws being installed through the installed noncombustible board should be self-tapping type with a maximum length of 2 inches. See Figure 10.1.
When installing finish material on the lower cover panel, DO NOT drill or install screws longer than 3/4 of an inch. Screws longer than 3/4 of an inch could penetrate the lower cover panel causing damage to components or penetrate the gas line. See Figure 10.1.
WARNING! Risk of Fire! DO NOT use screws longer than two inches when attaching finishing materials to installed non-combustible material. Screws longer than two inches will compromise clearance and could cause overheating and fire.
WARNING! Risk of Fire, Explosion or Asphyxiation! DO NOT use screws more than 3/4 of an inch long on lower cover panel. Longer screws may penetrate gas line or damage valve or electrical components.

MAXIMUM SCREW LENGTH = 2 INCHES (INSTALLED NON-COMBUSTIBLE BOARD)
NON-COMBUSTIBLE MATERIAL ONLY IN THIS AREA

2 IN.

MAXIMUM SCREW LENGTH = 3/4 INCH (LOWER COVER PANEL)

The appliance is designed to mate with 1/2 in. wall sheathing materials such as drywall, plywood, wood composites, or non-combustible materials.
To ensure good adhesion of drywall compounds and tape, thoroughly clean the non-combustible board and surrounding drywall to remove dust. The non-combustible board may be primed with a high-quality PVA primer.
Filling and Finishing Seams
1. Step 1: Fill all gaps and joints between the noncombustible 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 firmly 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 fiberglass 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 finishing coats are required to provide a smooth and durable finish. Hearth and Home Technologies recommends a lightweight or allpurpose compound. Allow each coat to properly cure. Allow the finishing coat(s) to cure for 24 hours before operating appliance.
WARNING! Risk of Fire! DO NOT apply combustible materials beyond the minimum clearances. Comply with all minimum clearances to combustibles as specified in this manual. Materials overlapping into non-combustible zones could ignite and will interfere with air flow through decorative barrier fronts.
WARNING! Risk of Fire! DO NOT install drywall or other combustible materials directly onto the installed noncombustible board. Overlapping materials could ignite.
Painting
If desired finishing 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.

= NO FASTENERS IN THIS AREA
Note: It is acceptable to use a high temperature silicone sealant to adhere drywall to lower cover panel.
Figure 10.1 Screw Length Requirements Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 65

Drywall Joint-Crack Prevention and Repair
Drywall joints around the fireplace will be affected by exposure to elevated temperatures, along with other environmental, structural factors due to new construction, and methods used to install and finish the drywall. If a crack does emerge adjacent to the fireplace, it can be permanently repaired by filling it with a paintable latex caulk, followed by repainting.
Some movement of the screws used to secure the noncombustible 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.
WARNING! Risk of Fire! Maintain specified air space clearances to combustibles. Inadequate air space could cause overheating and fire.
WARNING! Risk of Fire! Maintain specified air space clearances to combustibles. Failure to comply with these instructions may cause a fire or cause the appliance to overheat.
NOTICE: The location of the Passive Heat discharge opening could allow for venting and other construction materials to be visible. It is acceptable to paint the vent pipe and other construction materials using a high temperature paint with a minimum of 300 °F continuous exposure rating. Hearth & Home Technologies recommends using black touch up paint (part number TUP-GBK-12) available from your Hearth & Home Technologies dealer.
Facing Material
· Facing and/or finishing materials must not interfere with air flow through decorative barrier fronts.
· Facing and/or finishing materials must never overhang into the glass opening.
· Observe all clearances when applying combustible materials.

Finishing - Hearth See Inside Fit or Overlap Method sections to determine the necessary requirements for installation of a noncombustible hearth for this model. Only hearths made of non-combustible materials are allowed.
Decorative facing material thickness is measured from the face of the installed non-combustible board. See Figure 10.2 and Figure 10.3. The fronts for this appliance are compatible with noncombustible materials. See Figure 10.2 and Figure 10.3. Refer to Section 1.E and 1.F of this manual for definitions and qualifications of non-combustible and combustible materials. Specific requirements for each method of installation are described in this section.
Installation of finishing materials can be accomplished by either the "overlap" or "inside-fit" method, depending on what type of decorative barrier front is to be installed. See Figure 10.2 and 10.3. Overlap fit decorative barrier fronts include the Quattro and Loft Forge. The Clean Face Trim Front (CFT) can be either an inside fit or an overlap fit. See Table 1.
1/2 IN. THICK WALL SHEATHING
NON-COMBUSTIBLE FINISHING MATERIAL OVERLAP FIT = 0-1 IN. THICK INSIDE FIT = 1-4 IN. THICK

FINISHING GUARDS
BOTTOM FINISHING TEMPLATE

Figure 10.2 Finishing and Facing Materials - Single-Sided Models

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Decorative Barrier Front
Clean Face Trim (CFT)
Quattro/Loft Forge
Table 1

Finishing Method Inside Fit
Overlap Fit Overlap Fit

Material Thickness 1-4 inches
0-1 inch 0-1 inch

Trim Ring Included & Not Used (Option #1) Included & Used (Option #2)
Included & Used Not included

1/2 IN. THICK WALL SHEATHING

NON-COMBUSTIBLE FINISHING MATERIAL OVERLAP FIT = 0-1 IN. THICK INSIDE FIT = 1-4 IN. THICK

1/2 IN. INSTALLED NON-COMBUSTIBLE
BOARD

NON-COMBUSTIBLE FINISHING MATERIAL OVERLAP FIT = 0-1 IN. THICK INSIDE FIT = 1-4 IN. THICK

FINISHING GUARDS
Figure 10.3 Finishing Materials - See-Through Models

FINISHING GUARDS
BOTTOM FINISHING TEMPLATE (Control side only)

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C. Decorative Barrier Fronts
WARNING! Risk of Burns! A decorative barrier front is required for this model. DO NOT operate this appliance without a decorative barrier front in place. Only decorative barrier fronts certified for use with this appliance model may be used. Contact your dealer for a list of decorative barrier fronts that may be used.
Note: See appliance Owner's Manual for TV mounting guidelines.
The decorative barrier fronts approved for use with this appliance have been designed to be installed by two methods: Overlap Fit or Inside Fit. Before beginning the installation, it is important to determine which method will be used.
Clean Face Trim Front (CFT)
Overlap Fit (0-1 Inch Thick Finishing Method)
Non-Combustible Finish Materials
WARNING! Risk of Fire! DO NOT apply combustible materials beyond the minimum clearances. Comply with all minimum clearances to combustibles as specified in this manual. Overlapping materials could ignite.

Note: When a Clean Face Trim decorative barrier front is installed, the rectangular holes in bottom access panel will be covered.
NOTICE: This one inch maximum not only includes the decorative finish materials (marble, tile, slate, etc) but also the thin set, lath and adhesive used to attach the decorative finish material.
1. Remove bottom finishing template from bottom access panel. Verify that factory-installed finishing guards are installed to ensure finishing material does not extend into the fireplace opening. See Figure 10.2 and 10.3.
2. The non-combustible finish material, 0-1 inch thick, should be installed up to the fireplace opening on all four sides, including the bottom access panel, covering the eight rectangular holes. Refer to Figure 10.4 for minimum finished opening dimensions.
WARNING! Risk of Fire! DO NOT apply finishing material beyond the finishing guard. Appliance will overheat if finishing material extends into appliance opening.
NOTICE: Decorative barrier front will not fit properly if finishing material is applied beyond the finishing guard.
3. Follow Overlap Fit section of the instructions provided with decorative barrier front.

Decorative Barrier Front Clean Face Trim (CFT)

Finishing Method Overlap Fit

Material Thickness 0-1 inch

Trim Ring Included & Used

15-3/4 IN.

39-1/8 IN.MEZZO36-C/MEZZO36ST-C 51-1/8 IN.MEZZO48-C/MEZZO48ST-C 63-1/8 IN.MEZZO60-C/MEZZO60ST-C 75-1/8 IN.MEZZO72-C/MEZZO72ST-C
FIREPLACE VIEWING AREA

Figure 10.4 Minimum Finished Opening Dimensions - Clean Face Trim Front Method 68 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

Clean Face Trim Front (CFT) Inside Fit (1-4 Inches Thick Finishing Method)

Non-Combustible Finish Materials
WARNING! Risk of Fire! DO NOT apply combustible materials beyond the minimum clearances. Comply with all minimum clearances to combustibles as specified in this manual. Overlapping materials could ignite.

Note: When a Clean Face Trim decorative barrier front is installed, the rectangular holes in bottom access panel will be covered.

NOTICE: This four inch maximum not only includes the decorative finish materials (marble, tile, slate, etc) but also the thin set, lath and adhesive used to attach the decorative finish material.

There are two options for this method of finishing:

CFT Finishing Method Inside Fit

Trim Ring
Included & Not Used (Option #1)
Included & Used (Option #2)

With Decorative Trim Ring: (Option #2)
The trim ring, which is included with the CFT front, will be installed and used as a finishing template. It will be left exposed.
1. Remove finishing template from bottom access panel.
2. Remove top and bottom finishing guards.
3. Install trim ring (included with CFT decorative barrier front). Push trim ring completely into the opening.
4. Place trim ring into position and install the four shoulder bolts through the trim ring as shown in Figure 10.6. Install the screw as shown in Figure 10.5.
Finishing materials may be installed up to the trim ring but must not extend beyond it. See Figure 10.7.
NOTICE: It is recommended that high temperature silicone sealant (500º F minimum continuous exposure rating) be used to adhere the trim ring to the finishing material.
WARNING! Risk of Fire! DO NOT apply finishing material beyond the trim ring. Appliance will overheat if finishing material extends into appliance opening.

Without Decorative Trim Ring: (Option #1)
Note: You will not use the trim ring, which is shipped with the CFT front, for this application.
1. Remove bottom finishing template from bottom access panel. Verify that factory-installed finishing guards are installed to ensure finishing material does not extend into the fireplace opening. See Figures 10.2 and 10.3.
2. The non-combustible finish material, 1-4 inches thick, should be installed up to the fireplace opening on all four sides, including the bottom access panel, covering the eight rectangular holes. Refer to Figure 10.4.
WARNING! Risk of Fire! DO NOT apply finishing material beyond the finishing guard. Appliance will overheat if finishing material extends into appliance opening.
NOTICE: Decorative barrier front will not fit properly if finishing material is applied beyond the finishing guard.
3. Follow Inside Fit section of the instructions provided with decorative barrier front.
WARNING! Risk of Fire!
· If a Clean Face Trim (CFT) front has been installed and is to be replaced with a Quattro or Loft Forge decorative barrier front, the finishing material MUST be removed to reveal the eight rectangular holes on the bottom access panel.
· Overheating and fire could occur.

Figure 10.5 Install Trim Ring
SHOULDER BOLTS (4)
BOTTOM PANEL BOTTOM GLASS SHIELD
BOTTOM FINISHING TEMPLATE RECTANGULAR HOLE

Figure 10.6 Install Shoulder Bolts Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 69

TRIM RING INSTALLED FINISH TO THIS EDGE OF TRIM RING

Finishing - Raised Hearth in Front of Appliance A non-combustible hearth may be installed in front of the appliance only if the inside fit finishing method with CFT decorative barrier fronts is used.
1. Non-combustible hearth material may be placed up to the bottom edge of the trim ring. The hearth may be a maximum of twelve inches in depth.
CFT FRONTS ONLY

FINISH TO THIS EDGE

Figure 10.7 Non-Combustible Finish Material Diagram for 1-4 Inch Thick Inside Fit Method Using Trim Ring (Option #2)

TRIM RING

CFT FRONTS ONLY NON-COMBUSTIBLE HEARTH

12 IN. MAX

Figure 10.8 Finishing and Facing Materials - Inside Fit CFT Decorative Barrier Front Only

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Quattro and Loft Forge Decorative Barrier Front Overlap Fit (0-1 Inch Thick Finishing Material Only)
Non-Combustible Finish Materials

Decorative Barrier Front Quattro/Loft Forge

Finishing Method Overlap Fit

Material Thickness 0-1 inch

Trim Ring Not included

WARNING! Risk of Fire! DO NOT cover rectangular holes on bottom access panel when installing overlap fronts.
WARNING! Risk of Fire! DO NOT apply combustible materials beyond the minimum clearances. Comply with all minimum clearances to combustibles as specified in this manual. Overlapping materials could ignite.

WARNING! Risk of Fire! DO NOT apply finishing material beyond the top finishing guard and the bottom finishing template. Appliance will overheat if finishing material extends into appliance opening.
1. Follow instructions provided with decorative barrier front for installation.

NOTICE: This one inch maximum not only includes the decorative finish materials (marble, tile, slate, etc) but also the thin set, lath and adhesive used to attach the decorative finish material.
The non-combustible finishing material, 0-1 inch thick, should be installed up to the fireplace opening on the top and sides.
Use the factory-installed top finishing guard to ensure the finishing material does not extend into the fireplace opening.
Non-combustible finishing material should be installed on the bottom up to the bottom finishing template. See Figure 10.9. Do not cover the eight rectangular holes on the bottom access panel. See Figure 10.10 for minimum finished opening dimensions.

NOTICE: Decorative barrier front will not fit properly if finishing material is applied beyond the finishing guard.

BOTTOM FINISHING TEMPLATE
BOTTOM PANEL = RECTANGULAR ACCESS HOLES
DO NOT COVER
Figure 10.9 Non-Combustible Finishing Material Diagram for 0-1 Inch Thick Overlap Fit Method (Quattro/Forge) Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 71

WARNING! Risk of Fire! DO NOT apply combustible materials beyond the minimum clearances. Comply with all minimum clearances to combustibles as specified in this manual. Overlapping materials could ignite.

17-1/4 IN.

39-1/8 IN.MEZZO36-C/MEZZO36ST-C 51-1/8 IN.MEZZO48-C/MEZZO48ST-C 63-1/8 IN.MEZZO60-C/MEZZO60ST-C
FIREPLACE VIEWING AREA

Figure 10.10 Minimum Finished Opening Dimensions - Overlap Fit Method (Quattro and Loft Forge Decorative Barrier Fronts Only)

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D. Mantel and Wall Projections
WARNING! Risk of Fire! Comply with all minimum clearances to combustibles as specified. Framing closer than the minimums listed must be constructed entirely of noncombustible materials (i.e., steel studs, concrete board, etc.) If the Passive Heat kit will be installed, see Figure 10.19 for details regarding clearances to combustibles in addition to the requirements for Combustible and Non-Combustible Mantel diagrams and the Mantel Leg/Wall Projection diagrams (Figure 10.11-Figure 10.18).
Note: For non-combustible fireplace finish material (marble, stone, etc) specifications refer to Section 10.A.
TOP OF APPLIANCE OPENING

Note: All measurements in inches.
MAX. 9
6 3
30 27 24
MEASUREMENT FROM TOP EDGE OPENING

Figure 10.11 Location of Appliance Opening Note: Minimum distance from top edge opening to ceiling can be found in the Framing and Clearances section 3.B.
Combustible Mantels

MAX.
3 1

12 9 6

29 26 23
20 18

MEASUREMENT FROM TOP EDGE OPENING
Measurement from top edge opening to bottom of appliance = 24-1/2 IN.
Note: All measurements in inches.

Measurement from top edge opening to bottom of appliance = 24-1/2 IN.
Figure 10.13 Minimum Vertical and Maximum Horizontal Dimensions of Combustibles - MEZZO60-C, MEZZO60ST-C, MEZZO72-C and MEZZO72ST-C

Note: All measurements in inches.
MAX.
16

6

5

4 18

3

11

2

10

9

1

8

7

6

MEASUREMENTS FROM TOP EDGE OF THE APPLIANCE OPENING

Measurement from top edge of opening to bottom of appliance = 24-1/2 IN.

Figure 10.12 Minimum Vertical and Maximum Horizontal Dimensions of Combustibles - MEZZO36-C, MEZZO36ST-C, MEZZO48-C and MEZZO48ST-C

Figure 10.14 Minimum Vertical and Maximum Horizontal Dimensions of Combustibles - Passive Heat Kit Installed (All Sizes)

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Non-Combustible Mantels
OVERLAP FIT (QUATTRO/LOFT FORGE)
Note: All measurements in inches.

MAX. 16

6

5

4 18

3

11

2

10

9

1

8

7

6

MEASUREMENTS FROM TOP EDGE OF THE APPLIANCE OPENING

Measurement from top edge of opening to bottom of appliance = 24-1/2 IN.

INSIDE FIT (CFT)
Note: All measurements in inches.
MAX. 16

7 6 5

18 11

10

4

9

MEASUREMENTS FROM TOP EDGE OF THE APPLIANCE OPENING
Measurement from top edge of opening to bottom of appliance = 24-1/2 IN.

Figure 10.15 Minimum Vertical and Maximum Horizontal Dimensions of Non-Combustibles - Overlap Fit Finishing

Figure 10.16 Minimum Vertical and Maximum Horizontal Dimensions of Non-Combustibles - Inside Fit Finishing

Mantel Legs Or Wall Projections Extending Past The Face Of The Fireplace (Combustible or Non-Combustible)

4-1/2 IN. MINIMUM 3 FT. MAXIMUM

7 IN. MINIMUM UNLIMITED

FIREPLACE OPENING See Appliance Dimension Diagram-Dimension B Figure 3.1 (MEZZO36-C, MEZZO48-C) Figure 3.2 (MEZZO60-C, MEZZO72-C) Figure 3.3 (MEZZO36ST-C, MEZZO48ST-C) Figure 3.4 (MEZZO60ST-C, MEZZO72ST-C)
Figure 10.17 Mantel Leg or Wall Projections (Acceptable on both sides of opening)

FIREPLACE OPENING See Appliance Dimension Diagram-Dimension B Figure 3.1 (MEZZO36-C, MEZZO48-C) Figure 3.2 (MEZZO60-C, MEZZO72-C) Figure 3.3 (MEZZO36ST-C, MEZZO48ST-C) Figure 3.4 (MEZZO60ST-C, MEZZO72ST-C)
Figure 10.18 Mantel Leg or Wall Projections (Acceptable on both sides of opening)

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Clearances with Passive Heat Optional Heat Management System
Figure 10.19 shows the required clearances for appliance, ceiling finishing material and framing members. Ensure all clearances are maintained.
Good Faith Guidelines for TV Installations Above a MEZZO-C Fireplace with Passive Heat Option
(Single-Sided Appliance Shown)
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.

ROOM CEILING

1-1/2 IN. (2 X 4 FRAMING)

4 IN. MIN.

2 IN. MIN.
1/2 IN. X 1/2 IN. WIRE MESH*

2 X 4 FRAMING

2 X 4 OR 2 X 6

TV

FRAMING

CHASE CEILING - SEE FIGURES 3.14 & 3.16 Required for non-ducted front and side discharge passive heat installations. WIRE MESH*
= PASSIVE HEAT DISCHARGE OPENING
FIREPLACE OPENING

12 IN. MIN.

Measurement from top edge of opening to bottom of appliance = 24-1/2 IN.
* Wire mesh required for front discharge or open top discharge passive heat installations with discharge opening of 3 inches or greater.
Figure 10.19 Clearances with Passive Heat Optional Heat Management System Installed Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 75

11 Appliance Setup
A. Fixed Glass Assembly Removal and Replacement
WARNING! Risk of Asphyxiation! Handle fixed 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 fireplace with glass removed, cracked,
broken or scratched.
· Replace as a complete assembly.
Removing Fixed Glass Assembly 1. Remove the decorative barrier front from fireplace and
set aside on work surface.
2. Remove bottom glass shield. See Figure 11.2.
3. Locate the glass latches that are on the upper edge of the glass frame of the appliance. See Figure 11.1.
4. Use both index fingers to release the glass clips.
5. Allow glass to tilt forward. Grasp glass on the upper return lip of glass frame and lift up and out. The glass should lift easily out of the bottom retaining lip.
Replacing Fixed Glass Assembly 1. Locate retaining lip on lower front face of firebox.
2. Place glass assembly into retaining lip end. Tilt top of glass assembly toward fireplace.
3. Assure proper left to right placement of glass and engage all four spring latches.
4. Replace bottom glass shield and decorative barrier front.

B. Remove the Shipping Materials/Install Bottom Glass Shield
Remove shipping materials from inside or underneath the firebox. Verify all components are with the fireplace. Unwrap the bottom glass shield and replace in the same location as shown in Figure 11.2.
BOTTOM GLASS SHIELD
Figure 11.2 Bottom Glass Shield Location
CAUTION! Risk of Overheating! DO NOT remove component insulation from top of component heat shield. Electrical components will be damaged.

GLASS CLIPS
COMPONENT INSULATION
Figure 11.3 Component Insulation Location
BOTTOM RETAINING LIP Figure 11.1 Fixed Glass Assembly 76 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

C. Clean the Appliance
Clean/vacuum any sawdust that may have accumulated inside the firebox or underneath in the control cavity.

Optional Passive Heat Kit Installations Only:
WARNING! Risk of Fire! Remove all debris and objects from firebox top and appliance top before operating the appliance.
Inspect for and remove all debris that may have accumulated or objects that may have been placed on the firebox top and appliance top during the installation process. All debris and objects must be removed prior to operation of the appliance. Firebox top and appliance top are shown in Figure 11.4.

APPLIANCE TOP

FIREBOX TOP

Figure 11.4

D. Install Glass Refractory Panels
CAUTION! Risk of Cuts or Abrasions. Wear protective gloves and safety glasses during installation.
NOTICE: Handle refractory panels with care. Refractory may chip or crack if dropped or impacted.
Glass Panel Instructions
See-Through Models: See Section B
A. Single-Sided Models
1. Set back glass panel, labeled A in Figure 1, into firebox on top of the two back glass spacer blocks, with the smooth side of the glass facing outward. Position the retaining bracket inside appliance as shown in Figure 3. Line up the hole in the heat shield with the hole closest to the bend in the bracket and secure in place with a screw. See Figure 2 and Figure 3.
2. Bend the hand bend on the bracket down 90 degrees. See Figure 4.
3. Install side glass brackets by pushing up on the corner of the top heat shield and use two self-tapping screws to secure the bracket to the firebox. See Figure 5.
4. Install the left side panel, labelled "B" in Figure 1, by sliding it into place from the front. While installing, press the panel firmly against the firebox side.
5. Bend the tab on the glass bracket toward the side glass panel until a 1/16 inch - 1/8 inch gap is created between the tab and the side glass panel. See Figure 6.
6. Repeat for other side.
B. See-Through Models:
1. Set left side glass panel, labeled B in Figure 1, into firebox with the smooth side facing outward.
2. Bend the hand bend on the bracket down 90 degrees. See Figure 4.
3. Install side glass brackets using one self-tapping screw to secure the bracket to the firebox. See Figure 7.
4. Bend the tab on the glass bracket toward the side glass panel until a 1/16 inch - 1/8 inch gap is created between the tab and the side glass panel. See Figure 6.
5. Figure 7 shows retaining bracket installed. Repeat for other side.

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B

A*

C

RETAINING BRACKET

*Back panel used in single-sided models Figure 1 Placement of Glass Panels

GLASS SPACER BLOCKS (2)

Figure 5 Retaining Bracket Installation - Side Panel

Figure 2 Glass Spacer Block Location - Back

GAP = 1/16 IN. - 1/8 IN.

Figure 3 Retaining Bracket Installation - Back
HAND BEND TAB

Figure 6 Gap Between Tab and Side Glass Panel: 1/16 IN. - 1/8 IN.

Figure 4 Retaining Bracket - Side Panel

Figure 7 Retaining Bracket Installation - See-Through Models

78 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

E. Install Media
Media kits are available for use with the MEZZO models. Install glass media or stone media according to instructions included with the media kit.
F. Install Log Set (Optional)
An optional log set is available for use with the MEZZO models. Install the log set per instructions included with kit.
G. IntelliFire Touch® Control System Setup
· Detailed instructions for electrical wiring and connections are provided in Section 8.
· Determine if this appliance is equipped with a Module Reset Switch. See Section 8. Verify this switch is in the ON position.
· 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.
TOP VIEW
3 POSITION SWITCH

H. Install Decorative Barrier Front
WARNING! Risk of Fire! Install ONLY decorative barrier fronts approved by Hearth & Home Technologies. Unapproved decorative barrier fronts could cause fireplace to overheat.
IMPORTANT! This fireplace requires an installed decorative barrier front to prevent direct contact with the hot viewing glass. DO NOT operate the fireplace 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.

LED INDICATOR
Figure 11.5 IFT-ECM
This appliance is factory-equipped with an IntelliFire Touch remote control. The remote was paired to the fireplace and tested at the factory. It does not need to be paired again, unless an accessory kit will be added at the time of installation. If no additional accessory will be added, simply follow steps one through seven below. 1. If installed, remove batteries from remote. 2. Verify that the new appliance has power and secure
electrical connections. 3. Adjust the ECM selector switch to `REMOTE' mode. 4. Switch the master reset switch to `ON' (if equipped). 5. Wait to verify LED indicator on the ECM stops flashing. 6. Install batteries in the RC400 remote. 7. The RC400 remote will automatically pair to the
appliance as pre-set at the factory.
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12 Reference Materials
A. Vent Components Diagrams

Effective Height/Length
DVP Pipe (see chart)

Pipe
DVP4 DVP6 DVP12 DVP24 DVP36 DVP48 DVP6A DVP12A

Effective Length

Inches Millimeters

4

102

6

152

12

305

24

610

36

914

48

1219

3 to 6 76 to 152

3 to 12 76 to 305

10-1/2 in.

(267 mm)

45 °

4-7/8 in. (124 mm)

10-7/8 in. (276 mm)

DVP45 (45º Elbow)

20-3/4 in. (527 mm)

Tab=1 in. (25.4 mm)

Finished Height: 19-3/4 in./502 mm UNIV-AS2 (Attic Insulation Shield)

10 in. (254 mm)

10 in. (254 mm)

1 in. (25 mm)

10 in. (254 mm)
UP
5 in. (127 mm)

1- 1/2 in. (38 mm)

DVP-FS (Ceiling Firestop)

12 in. (305 mm)

11-3/8 in. (289 mm)

7-3/8 in. (187 mm)

9-1/4 in. (235 mm)
13-1/4 in. (337 mm)

1-1/4 in. (32 mm) 1/2 in. TYP (13 mm)

DVP90ST (90° Elbow)

DVP-HVS (Vent Support)
14 IN. (356 MM)

20 IN. (508 MM)

14 in. (356 mm)

12 in. (305 mm)

1 in. (25 mm)
8 in. (203 mm)

14 IN. (356 MM)

12 IN.

DVP-RDS

(305 MM)

ROOF DECK INSULATION SHIELD

6 in. (152 mm)
DVP-WS (Wall Shield Firestop)

Figure 12.1 DVP Vent Components 80 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

A. Vent Components Diagrams (continued)

Note: Heat shields MUST overlap by a minimum of 1-1/2 in. (38 mm). The heat shield is 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. (102 mm) the existing heat shields must be field trimmed. If wall thickness is greater than 7-1/4 in. (184 mm) a DVP-HSM-B
will be required.

8 in. (203 mm)

Heat Shield

15-1/8 in. (384 mm)

*5 in. (127 mm)

* Center of the horizontal vent pipe to the vertical measuring surface.

12 in. (305 mm)
DVP-TRAP Horizontal Termination Cap

Max Effective Length

Term Cap Trap1 Trap2

Minimum Effective Length
3-1/8 in. 79 mm 5-3/8 in. 137 mm

Maximum Effective Length
4-5/8 in. 117 mm 9-3/8 in. 238 mm

DVP-TRAP1

DVP-TRAP2

DVP-TRAPK1

DVP-TRAPK2

DVP-HPC1

DVP-HPC2

Figure 12.2 DVP Vent Components Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 81

A. Vent Components Diagrams (continued)
13-1/4 in. (337 mm)

24-5/8 in. (625 mm)

31 in. (787 mm)

24-5/8 in. (625 mm)

27-1/2 in. (699 mm)

RF6 Roof Flashing

RF12 Roof Flashing

13-1/4 in. (337 mm)

7 IN. (178 mm)

7 IN. (178 mm)

11-7/8 in. (302 mm)

5 in. (127 mm)

A

A

A

4-15/16 IN. 13-7/8 in. (125 mm) (352 mm)

12 IN. (305 mm)

7/8 IN. (22 mm)

TRAP-VSS Vinyl Siding Shield

1/2 IN. (13 mm)

DVP-BEK2 DVP-HPC Cap Brick Extension

DVP-TRAPFL Flashing

11-5/8 in. (295 mm)
7-1/8 in. (181 mm)
5-3/4 in. (146 mm)

26 in. 660 mm

12-1/8 in. (308 mm)
COOL-ADDM Cap Shield
13-7/8 in. (352 mm)
14 in. (356 mm)

9-1/2 in. (241 mm)

DVP-HSM-B Extended Heat Shield

DRC-RADIUS Cap Shield

Figure 12.3 DVP Vent Components 82 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

A. Vent Components Diagrams (continued)

1-1/2 in. (38 mm)

7-3/8 in. (187 mm)

14 in. (356 mm)
6 in. 152 mm
12 in. (305 mm)
DVP-TB1 Basement Vent Cap

17-3/4 in. (451 mm)

12 in. 305 mm

7-1/4 in. (184 mm) 5-1/4 in. (133 mm)

12-1/2 in. (318 mm)

DVP-TVHW VerticalTermination Cap (Highwind)

16-7/8 in. (429 mm)

14 in. (356 mm)

1 in. (25 mm)

7-1/4 in. (184 mm)

12 in. (305 mm)
12-1/8 in. (314 mm)

7-1/8 in. (181 mm)
8-3/4 in. (222 mm)

1-5/8 in. (41 mm)
DVP-HPC High Performance Cap

14 in. (356 mm)
3/8 in. (10 mm) 1 in. (25 mm) 7-3/4 to 10-3/8 in. (197 to 264 mm)
DVP-FBHT FireBrickTermination Cap

15 in. (381 mm)

8-1/8 in. (206 mm)

13 in. (330 mm)

Effective Length 5-3/4 to 8-3/8 in. 146 to 213 mm

5-1/2 in. 8-3/8 in. 140 mm 213 mm
87° 3°

10-1/2 in. 267 mm
10-7/8 in. 276 mm

DVP-HRC-SS

DVP-HRC-ZC-SS

Figure 12.4 DVP Vent Components

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A. Vent Components Diagrams (continued)

7-3/8 IN. 187 mm

14 IN. 356 mm

17-7/8 IN. 454 mm

12 IN. 305 mm

SLP-TB1 Basement Vent Cap

Figure 12.5 Vent Components
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.
Decorative Terminations Caps/Shrouds
DTO134 DTO146 DTS134 DTS146 LDS33 LDS46 LDS-BV

84 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

A. Vent Components Diagrams (continued)

13-11/16 IN.

TOP VIEW

4 IN.
SIDE VIEW

1-3/4 IN.

Required Wire Harness and PVV-SLEEVE

Lengths Available

Part Number

10 ft. PV Wire Harness

PVI-WH10

20 ft. PV Wire Harness

PVI-WH20

40 ft. PV Wire Harness

PVI-WH40

60 ft. PV Wire Harness

PVI-WH60

80 ft. PV Wire Harness

PVI-WH80

100 ft. PV Wire Harness

PVI-WH100

Description

Part Number

12 in. Wire Harness Sleeve PVV-SLEEVE-12

48 in. Wire Harness Sleeve PVV-SLEEVE-48

13-5/8 IN. 3-11/16 IN.
5-7/8 IN.
12-1/8 IN.
PVV-SLP Vertical Power Vent
Note: A wire harness is required to power the PVV-SLP and connect it to the appliance. It is ordered separately from the PVV-SLP. Contact your dealer to order.

Note: The PVV-SLEEVE-12 and/or PVV-SLEEVE-48 is required to be installed with the PVV-SLP. It is ordered separately from the PVV-SLP. Contact your dealer to order.

Figure 12.6 PVV-SLP Vent Components Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 85

EFFECTIVE LENGTH 32 IN. (813 mm) MIN. 35 IN. (889 mm) MAX.

13-5/8 IN. 346 mm
12-1/2 IN. 318 mm

20-3/4 IN. 527 mm
PVI-SLP-B Power Vent Inline
Note: SLP-LPC, SL-2DVP and DVP-2SL components must be accompanied by a PVI-SLP-B.

Optional Wire Harness

DESCRIPTION

PART NUMBER

10 FT PV Wire Harness PVI-WH10

20 FT PV Wire Harness PVI-WH20

40 FT PV Wire Harness PVI-WH40

60 FT PV Wire Harness PVI-WH60

80 FT PV Wire Harness PVI-WH80

100 FT PV Wire Harness PVI-WH100

Note: Wire harnesses required to power the PVI-SLP-B connect to the appliance and are ordered separately from PVI-SLP-B. Contact your dealer to order.

16 IN. 406 mm

9-3/16 IN. (233 mm)

4-1/2 IN. 114 mm

13-5/8 IN. (346 mm)

16-11/16 IN. 424 mm

15 IN. (381 mm)
16-11/16 IN. (424 mm)

12-1/2 IN. (318 mm)

SLP-LPC SLP Low Profile Cap (Approved for use with PVI-SLP-B only)

3-15/16 in. (101 mm)

6-11/16 in. (169 mm)

3-13/16 in. (97 mm)

8 in. (203 mm)
SL-2DVP Adapter

3-15/16 in. (101 mm)

5-1/16 in. (128 mm)

4 in. 102 mm

6-3/8 in. 163 mm
8-1/8 in. 206 mm

4-5/8 in. 117 mm
DVP-2SL Adapter

4-3/16 in. 106 mm
5-1/16 in. 128 mm

Figure 12.7 PVI-SLP-B Vent Components 86 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21

A. Vent Components Diagrams (continued)
Top View

6-1/4 IN. 159 mm

14 IN. 356 mm

Front View 15-1/2 IN. 394 mm
11-1/2 IN. 292 mm

1-1/2 IN. 38 mm
Side View

2-1/4 IN. 57 mm

8 IN. 203 mm

4-3/4 IN. 121 mm 9-1/2 IN.
241 mm

4-3/8 IN. 112 mm

10 IN. 254 mm

5-1/4 IN. 135 mm

PVLP-SLP Power Vent Low Profile

2-1/4 IN. 57 mm

Note: Wire harnesses required to power the PVLP-SLP connect to the appliance and are ordered separately from PVLP-SLP. Contact your dealer to order.
Note: A PVLP-HS heat shield is available and sold separately. Use if the PVLP-SLP is installed in a high traffic area.

PVLP-BEK Brick Kit

PVLP-HS Heat Shield

Required Wire Harness

DESCRIPTION

PART NUMBER

10 FT PV Wire Harness PVI-WH10

20 FT PV Wire Harness PVI-WH20

40 FT PV Wire Harness PVI-WH40

60 FT PV Wire Harness PVI-WH60

80 FT PV Wire Harness PVI-WH80

100 FT PV Wire Harness PVI-WH100

Figure 12.8 PVLP-SLP Vent Components Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21 87

B. Accessories
Install approved accessories per instructions included with accessories. Contact your dealer for a list of approved 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.
Remote Controls, Wall Controls and Wall Switches
Follow the instructions supplied with the control installed to operate your fireplace:
For safety:
· Install a switch lock or a wall/remote control with child protection lockout feature.
· Keep remote controls out of reach of children.
See your dealer if you have questions.

Optional Heat Management Systems Kits
After a qualified service technician has installed the heat management system, follow the instructions supplied with the kit for operation. Contact your dealer if you have questions.
Note: Optional heat management systems kit must be installed while the top of the appliance is accessible.
· Preparation for installation of Heat-Zone-Gas, HEATOUT-GAS or Passive Heat is discussed in Section 6.B.

Heat & Glo, a brand of Hearth & Home Technologies 7571 215th Street West, Lakeville, MN 55044 www.heatnglo.com
Please contact your Heat & Glo dealer with any questions or concerns. For the location of your nearest Heat & Glo dealer, please visit www.heatnglo.com.
Printed in U.S.A. - Copyright 2021 88 Heat & Glo · MEZZO36-C/ST-C, MEZZO48-C/ST-C, MEZZO60-C/ST-C, MEZZO72-C/ST-C Installation Manual · 2600-980 Rev. K · 3/21


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