Monessen Hearth BUF32A Manuale utente

Installation Manual

Installation and Setup

INSTALLER: Leave this manual with party responsible for use and operation.

OWNER: Retain this manual for future reference.

VENT FREE FIREBOX

Model(s):

NOTICE: DO NOT discard this manual!

• DO NOT store or use gasoline or other

ammable vapors and liquids in the vicinity

of this or any other appliance.

• DO NOT overre. Overring will void your

warranty.

• Comply with all minimum clearances to

combustibles as specied. Failure to com-

ply may cause house re.

WARNING: If the information in these



or explosion may result causing property

damage, personal injury, or death.

Carefully review the instructions supplied

with the decorative type unvented room

heater for the minimum fireplace size

requirement.

DO NOT INSTALL AN APPLIANCE IN THIS

FIREBOX UNLESS THIS FIREBOX MEETS

THE MINIMUM DIMENSIONS REQUIRED

FOR THE INSTALLATION.

HOT SURFACES!

Firebox surfaces are hot during

operation AND cool down.

Hot surfaces will cause burns.

• DO NOT touch rebox until it is cooled

• NEVER allow children to touch rebox

• Keep children away

• CAREFULLY SUPERVISE children in same room as rebox.

• Alert children and adults to hazards of high temperatures.



materials.

• Keep clothing, furniture, draperies and other ammable

materials away.

DANGER

FOR USE ONLY WITH A LISTED GAS-FIRED UNVENTED DECO-

RATIVE ROOM HEATER NOT TO EXCEED 40,000 BTU/H.

DO NOT BUILD A WOOD FIRE.

BUF32A, BUF36A, BUF42A

BUF32-T, BUF36-T, BUF42-T

BUF32-H, BUF36-H, BUF42-H

Monessen • BUF32/36/42 Installation Manual • 4139-901 • Rev A • 01/21

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: Indicates practices which may cause damage to the replace or to property.

Table of Contents

Installation Standard Work Checklist 3

 

A. Firebox Certication 4

B. BTU Specications 4

C. High Altitude Installations 4

D. Non-Combustible Materials Specication 4

E. Combustible Materials Specication 4

F. Electrical Codes 4

2 Getting Started

A. Design and Installation Considerations 5

B. Tools and Supplies Needed 5

C. Inspect Firebox and Components 5

3Firebox Dimensions

A. Firebox Dimensions 6

B. Hearth Dimensions 7

C. Framing Dimensions 8

D. Clearance to Combustibles 9

E. Constructing the Appliance Chase 10

4 Firebox Preparation

A. Securing and Leveling the Firebox 11

B. Installing Optional Outside Air Kit(s) 11

5 Electrical Information

A. Wiring Requirements 12

B. Wiring the Junction Box 12

C. Electrical Service and Repair 12

D. Wiring Diagrams 13

6 Gas Information

A. Fuel Type 17

B. Gas Pressure 17

C. Gas Connection 17

7 Finishing

A. Facing Material 18

B. Mantel and Wall Projections 18

C. Decorative Fronts 19

D. TV Good Faith Guidelines 20

8 Firebox Setup

A. Remove the Shipping Materials 21

B. Clean the Firebox 21

C. Hood Installation 21

D. Adjustable Firebox Supports 21

9 Reference Materials

A. Optional Accessories 23

B. Contact Information 24

2Monessen • BUF32/36/42 Installation Manual • 4139-901 • Rev A • 01/21

Customer:

Lot/Address

Model (circle one): BUF32A, BUF36A, BUF42A

BUF32-T, BUF36-T, BUF42-T

BUF32-H, BUF36-H, BUF42-H

YES IF NO, WHY?

ATTENTION INSTALLER:

Follow this Standard Work Checklist

This standard work checklist is to be used by the installer in conjuction with, not instead of, the instructions contained in this installation

manual.

Date Installed:

Location of Firebox:

Installer:

Dealer/Distributor Phone #

Serial #:

WARNING! Risk of Fire or Explosion! Failure to install firebox acording to these instructions can lead to a fire or

explosion.

Comments communicated to party responsible

4139-982 • Rev A• 1/21

• Photographing the installation and copying this checklist for your file.

(Builder/Gen. Contractor) (Installer) (Date)

Comments: Further description of the issues, who is responsible (Installer/Builder/Other Trades, etc.) and corrective action needed:

• That this checklist remain visible at all times on the fireplace until the installation is complete.

__________________________ by ______________________on _________

Firebox Install Section(s) 3 & 4

Verified clearances to combustibles.

Firebox is leveled and secured.

Outside Air Kit Installed (Optional)

Electrical Section 5

Unswitched power (110-120 VAC) provided to the firebox.

Gas Section 6

Proper fuel type

Leak check performed and inlet pressure verified.

Finishing Section 7

Combustible materials not installed in non-combustible areas.

Verified all clearances meet installation manual requirements.

Mantels and wall projections comply with installation manual requirements.

Hearth extension installed per manual requirements.

Firebox Setup Section 8

All packaging and protective materials removed.

Refractory installed correctly.

Firescreen installed properly.

Manual bag and all of its contents are removed from the firebox and given to

the party responsible for use and operation.

Blower kit installed properly. (Optional)

Light kit installed properly. (Optional)

Hearth & Home Technologies recommends the following:

Monessen • BUF32/36/42 Installation Manual • 4139-901 • Rev A • 01/21

 

NOT INTENDED FOR USE AS A PRIMARY HEAT SOURCE.

This appliance is tested and approved as either supplemen-

tal room heat or as a decorative appliance. It should not be

factored as primary heat in residential heating calculations.

NOTICE: This installation must conform with local codes.

In the absence of local codes you must comply with the

National Fuel Gas Code, ANSI Z223.1/NFPA 54.

This product is listed to ANSI standards for “Ventless Gas

Firebox Enclosures for Gas-Fired Unvented Gas Log

Type Room Heaters".

MODELS: BUF32A, BUF36A, BUF42A

BUF32-T, BUF36-T, BUF42-T

BUF32-H, BUF36-H, BUF42-H

LABORATORY: Underwriters Laboratories, Inc. (UL)

TYPE: Ventless Firebox Enclosures for Gas-Fired

Unvented Gas Log Type Room Heaters

STANDARD: CSA/ANSI-Z21.91:20

 

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.

This product is for use ONLY with a listed decorative

"Gas-Fired Unvented Room Heaters".

1  

Model(s) Altitude Maximum

Allowable

BTU/hr

BUF32 A/T/H (0-2000 FT) 30,000

BUF36 A/T/H (0-2000 FT) 40,000

BUF42 A/T/H (0-2000 FT) 40,000

 

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.

 

Materials made of or surfaced with wood, compressed pa-

per, plant bers, plastics, or other material that can ignite

and burn, whether ame proofed or not, or plastered or

unplastered shall be considered combustible materials.

F. 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.

C. 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.

Check with your local gas utility to determine proper

orice size.

Note: Smoke, carbon monoxide or combination alarms

Alarm manufacturers recommend that alarms be kept at

least 15 ft. to 20 ft. laterally away from fuel-burning sources.

Installing the alarm closer than 15 ft. will not harm the

alarm, but may increase the frequency of nuisance alarms.

Mounting alarms on the wall versus the ceiling will further

reduce nuisance alarms.

4Monessen • BUF32/36/42 Installation Manual • 4139-901 • Rev A • 01/21

A. Design and Installation Considerations

Installation MUST comply with local, regional, state and

national codes and regulations. Consult insurance carrier,

local building inspector, re o󰀩cials or authorities having

jurisdiction over restrictions, installation inspection and

permits.

Before installing, determine the following:

• Where the rebox is to be installed.

• Gas supply piping requirements.

• Electrical wiring requirements.

• Framing and nishing details.

• Whether optional accessories - are desired.

C. Inspect Firebox and Components

• Carefully remove the rebox and components from the

packaging.

• Report to your dealer any parts damaged in shipment.

•Read all of the instructions before starting the instal-

lation. Follow these instructions carefully during the



WARNING! Risk of Fire or Explosion! Damaged parts

could impair safe operation. DO NOT install damaged,

incomplete or substitute components. Keep rebox dry.

B. Tools and Supplies Needed

Before beginning the installation be sure that the following

tools and building supplies are available.

Tape measure Framing material

Pliers Hammer

Phillips screwdriver Level

Gloves Framing square

Electric drill and bits

Safety glasses

Reciprocating saw

Caulking material (300ºF minimum continuous exposure

rating)

Note: Refer to the installation instructions provided with

the log set for items required for log set installation.

Hearth & Home Technologies disclaims any responsibility

for, and the warranty will be voided by, the following actions:

• Installation and use of any damaged rebox or system

component.

• Modication of the rebox.

• Installation other than as instructed by Hearth & Home

Technologies.

• Improper positioning of the gas logs.

• Installation and/or use of any component part not approved

by Hearth & Home Technologies.



WARNING! Risk of Fire, Explosion or Electric Shock!

DO NOT use this rebox if any part has been under water.

Call a qualied service technician to inspect the rebox

and to replace any part of the control system and/or gas

control which has been under water.

Improper installation, adjustment, alteration, service or

maintenance can cause injury or property damage. For

assistance or additional information, consult a qualied

service technician, service agency or your dealer.

Installation and service of this appliance should be performed by

qualied personnel. Hearth & Home Technologies recommends

HHT Factory Trained or NFI certied professionals.

2 Getting Started

Monessen • BUF32/36/42 Installation Manual • 4139-901 • Rev A • 01/21

3 Firebox, Hearth, Framing Dimensions and Clearances

A. Firebox Dimensions

Dimensions are actual rebox dimensions. Use for reference only. For framing dimensions and clearances refer to page 8.

Figure 3.1 Firebox Dimensions

4 in

(102 mm)

27 in

(686 mm)

3 in

(76 mm)

34 in

(864 mm)

20 in

(508 mm)

15-7/8 in

(403 mm)

5-3/4 in

(146 mm)

5-3/4 in

(146 mm)

15-7/8 in

(403 mm)

2 in

(51 mm)

7-3/4 in

(197 mm)

2 in

(50 mm) 9-3/8 in

(238 mm)

32" 36" 42"

A 32 in (813 mm) 36 in (914 mm) 42 in (1067 mm)

B 38 in (965 mm) 42 in (1067 mm) 48 in (1219 mm)

Gas Access

Above Hearth

Outside Air

Electrical Access

Wall Switch

Strain Relief

Outside

Air Gas Access

Above Hearth

Gas Access

Below Hearth

6Monessen • BUF32/36/42 Installation Manual • 4139-901 • Rev A • 01/21

FP2901

hearth dims

Figure 3.2 Minimum Hearth Dimensions

B. Hearth Dimensions

Model A B C D E

BUF32 28-7/8 in. 15 in. 20-3/8 in 25-1/2 in. 22-5/8 in.

BUF36 32-7/8 in. 15 in. 24-3/8 in. 25-1/2 in. 22-5/8 in.

BUF42 38-7/8 in. 15 in. 30-3/8 in. 25-1/2 in. 22-5/8 in.

Monessen • BUF32/36/42 Installation Manual • 4139-901 • Rev A • 01/21

C. Framing Dimensions

WARNING! Risk of Fire or Burns! Provide adequate

clearance around air openings and for service access.

Due to high temperatures, the appliance should be lo-

cated out of trac and away from furniture and draperies.

NOTICE: Illustrations reect typical installations and are

FOR DESIGN PURPOSES ONLY. Illustrations/diagrams

are not drawn to scale. Actual installation may vary due to

individual design preference.

Figure 3.3 Framing Dimensions

5/8 in

5/8 in C

Note: Add 1/2 inch to width (A) and 1/4 inch to

height (B) dimensions when using optional trim

kit to nish the installation of a custom cabinet,

mantle, or other built-in enclosure.

MODEL A B C D E F

BUF32 38-1/2 in 34-1/4 in 19-3/4 in 47-1/4 in 66-3/4 in 33-1/2 in

BUF36 42-1/2 in 50 in 70-3/4 in 36 in

BUF42 48-1/2 in 54-1/4 in 76-3/4 in 38-1/2 in

34-1/4 in

19-3/4 in

8Monessen • BUF32/36/42 Installation Manual • 4139-901 • Rev A • 01/21

D. Clearances to Combustibles

Carefully select the best location for installation of your

vent-free rebox. The following factors should be taken

into consideration:

• Clearance to side walls and ceiling. Minimum clearances

to combustibles must be maintained.

• Location must not be a󰀨ected by drafts caused by

kitchen exhaust fans, ceiling fans, return air registers for

forced air furnaces / air conditioners, windows or doors.

• Installation must provide adequate ventilation and com-

bustion air.

Figure 3.4 Clearances to Combustibles

• Location should be out of high tra󰀩c or windy or drafty

areas.

• DO NOT INSTALL WHERE CURTAINS, FURNITURE,

CLOTHING OR OTHER FLAMMABLE OBJECTS ARE

LESS THAN 36" FROM FRONT OF FIREBOX.

• Never obstruct the front opening of the vent-free rebox

or restrict the ow of combustion and ventilation air.

0" in to back

0" in to side

0 in

Drywall

Combustible flooring may be installed next to the front of the appliance.

(No carpet or vinyl within 14 inches)

6 in. (152 mm) min.

9 in (229 mm) min.

(from firebox opening)

Drywall

Perpendicular

Wall

36 in

(914 mm)

Combustible Object

42 in to ceiling

(1067 mm)

0 in to floor

0 in to standoffs

Monessen • BUF32/36/42 Installation Manual • 4139-901 • Rev A • 01/21

Raised Hearth Extension

A hearth extension may be used, but is not required for

these reboxes.

A combustible hearth extension can be constructed ush

with, but not above the rebox oor. On ush installa-

tions, carpet or vinyl is not allowed within 14 inches of

the rebox opening. See Figure 3.5.

Figure 3.5 Raised Hearth Extension

Firebox framing can be built before or after the appliance is

set in place. Construct rebox framing following Figure 3.3

for your specic installation requirements. Refer to Figure

3.1 on page 6 for rebox dimensions.

The rebox may be installed directly on a combustible

oor or raised on a platform. When the rebox is installed

directly on carpeting, tile, or other combustible material,

other than wood ooring, the rebox shall be installed on a

metal or wood panel extending the full width and depth of

the enclosure.

WARNING! Risk of Fire! DO NOT ll spaces around re-

box with insulation or other materials. This could cause a

re.

WARNING! Risk of Fire! The rebox must be installed

giving full consideration to the clearance and height re-

quirements identied in this manual.

E. Constructing the Appliance Chase

A chase is a vertical box-like structure built to enclose the

rebox.

NOTICE: 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.

Chases should be constructed in the manner of all outside

walls of the home to prevent cold air drafting problems. The

chase should not break the outside building envelope in

any manner.

Walls, ceiling, base plate and cantilever oor of the chase

should be insulated. Vapor and air inltration barriers should

be installed in the chase as per regional codes for the rest

of the home. Additionally, in regions where cold air inltra-

tion may be an issue, the inside surfaces may be sheet

rocked and taped (or an equivalent method may be used)

to achieve maximum air tightness.

To further prevent drafts, gas line holes and other open-

ings should be caulked with caulk with a minimum of 300ºF

continuous exposure rating or stu󰀨ed with unfaced insulation.

If the rebox is being installed on a cement surface, a layer of

plywood may be placed underneath to prevent conducting cold

up into the room.

NOTICE: Install rebox 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 specied air space

clearances to rebox:

• 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 rebox.

• Failure to maintain airspace may cause overheating and

a re.

0" Minimum

Combustible Platform

Raised Hearth Extension

(Combustibles allowed;

No carpet or vinyl within

14 inches)

Firebox Floor

10 Monessen • BUF32/36/42 Installation Manual • 4139-901 • Rev A • 01/21

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