Table of Contents
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INSTALLER: Leave this manual with party responsible for use and operation.
OWNER: Retain this manual for future reference.
NOTICE:
DO NOT discard this manual!
Model(s):
VENT FREE FIREBOX
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.
Installation Manual
Installation and Setup
Monessen • BUF32/36/42 Installation Manual • 4139-901 • Rev A • 01/21
WARNING: If the information in these
instructions is not followed exactly, a fire
or explosion may result causing property
damage, personal injury, or death.
• DO NOT store or use gasoline or other
flammable vapors and liquids in the vicinity
of this or any other appliance.
• DO NOT overfire. Overfiring will void your
warranty.
• Comply with all minimum clearances to
combustibles as specified. Failure to com-
ply may cause house fire.
DANGER
HOT SURFACES!
Firebox surfaces are hot during
operation AND cool down.
Hot surfaces will cause burns.
• DO NOT touch firebox until it is cooled
• NEVER allow children to touch firebox
• Keep children away
• CAREFULLY SUPERVISE children in same room as firebox.
• Alert children and adults to hazards of high temperatures.
High temperatures may ignite clothing or other flammable
materials.
• Keep clothing, furniture, draperies and other flammable
materials away.
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.
1
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Summary of Contents for Monessen Hearth BUF32A
- Page 1 Installation Manual Installation and Setup INSTALLER: Leave this manual with party responsible for use and operation. OWNER: Retain this manual for future reference. NOTICE: DO NOT discard this manual! WARNING: If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury, or death.
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Page 2: Table Of Contents
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. •... -
Page 3: Installation Standard Work Checklist
Date Installed: Lot/Address Location of Firebox: Installer: Model (circle one): BUF32A, BUF36A, BUF42A Dealer/Distributor Phone # BUF32-T, BUF36-T, BUF42-T Serial #: BUF32-H, BUF36-H, BUF42-H WARNING! Risk of Fire or Explosion! Failure to install firebox acording to these instructions can lead to a fire or explosion. -
Page 4: Product Specific Information
Product Specific Information B. BTU Specifications A. Firebox Certification This product is for use ONLY with a listed decorative "Gas-Fired Unvented Room Heaters". MODELS: BUF32A, BUF36A, BUF42A BUF32-T, BUF36-T, BUF42-T Model(s) Altitude Maximum BUF32-H, BUF36-H, BUF42-H Allowable BTU/hr LABORATORY: Underwriters Laboratories, Inc. (UL) -
Page 5: Getting Started
Getting Started A. Design and Installation Considerations C. Inspect Firebox and Components Installation MUST comply with local, regional, state and • Carefully remove the firebox and components from the national codes and regulations. Consult insurance carrier, packaging. local building inspector, fire officials or authorities having •... -
Page 6: Firebox Dimensions
Firebox, Hearth, Framing Dimensions and Clearances A. Firebox Dimensions Dimensions are actual firebox dimensions. Use for reference only. For framing dimensions and clearances refer to page 8. 3 in 20 in (76 mm) (508 mm) Outside Air Outside Gas Access 34 in 27 in Above Hearth... -
Page 7: Hearth Dimensions
B. Hearth Dimensions Figure 3.2 Minimum Hearth Dimensions FP2901 hearth dims Model 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 •... -
Page 8: Framing Dimensions
C. Framing Dimensions WARNING! Risk of Fire or Burns! NOTICE: Provide adequate Illustrations reflect typical installations and are clearance around air openings and for service access. FOR DESIGN PURPOSES ONLY. Illustrations/diagrams Due to high temperatures, the appliance should be lo- are not drawn to scale. -
Page 9: Clearance To Combustibles
D. Clearances to Combustibles • Location should be out of high traffic or windy or drafty areas. Carefully select the best location for installation of your • vent-free firebox. The following factors should be taken DO NOT INSTALL WHERE CURTAINS, FURNITURE, into consideration: CLOTHING OR OTHER FLAMMABLE OBJECTS ARE LESS THAN 36"... -
Page 10: Constructing The Appliance Chase
E. Constructing the Appliance Chase Raised Hearth Extension A hearth extension may be used, but is not required for A chase is a vertical box-like structure built to enclose the these fireboxes. firebox. A combustible hearth extension can be constructed flush NOTICE: with, but not above the firebox floor. -
Page 11: Firebox Preparation
Firebox Preparation B. Installing Optional Outside Air Kit(s) A. Securing and Leveling the Firebox Note: The outside air kit is an optional accessory that WARNING! Risk of Fire! Prevent contact with: can be used to bring in fresh air. Use of the air kit is not •... -
Page 12: Electrical Information
Electrical Information A. Wiring Requirements • Install electrical wires from outside the appliance through the hole in the cover plate and secure wires WARNING! Risk of Shock or Explosion! DO NOT wire with a Romex connector. 110-120 VAC to the valve. Incorrect wiring will damage •... -
Page 13: Wiring Diagrams
D. Wiring Diagrams BLOWER TEMPERATURE SENSOR LIGHT SOCKET ASSEMBLY POWER CORD WIRE HARNESS WIRE HARNESS LIGHT CONTROL FAN CONTROL MOUNTED IN FIREBOX MOUNTED IN FIREBOX JUNCTION BOX Figure 5.4 Wiring Diagram - Standard Monessen • BUF32/36/42 Installation Manual • 4139-901 • Rev A • 01/21... - Page 14 BLOWER FAN CONTROL MOUNTED IN REMOTE WALL BOX Note: Wires supplied from remote wall box loca�ons, to pass through provided knockout in face of junc�on box. TEMPERATURE SENSOR LIGHT SOCKET ASSEMBLY POWER CORD WIRE HARNESS WIRE HARNESS KNOCKOUT LIGHT CONTROL MOUNTED IN FIREBOX JUNCTION BOX Figure 5.5 Wiring Diagram - Remote Fan Control...
- Page 15 BLOWER LIGHT CONTROL MOUNTED IN REMOTE WALL BOX Note: Wires supplied from remote wall box loca�ons, to pass through provided knockout in face of junc�on box. TEMPERATURE SENSOR LIGHT SOCKET ASSEMBLY POWER CORD WIRE HARNESS KNOCKOUT FAN CONTROL MOUNTED IN FIREBOX JUNCTION BOX Figure 5.6 Wiring Diagram - Remote Light Control Monessen •...
- Page 16 BLOWER BOTH FAN AND LIGHT CONTROLS MOUNTED IN REMOTE WALL BOX FAN CONTROL LIGHT CONTROL Note: Wires supplied from remote wall box loca�ons, to pass through provided knockout in face of junc�on box. TEMPERATURE SENSOR LIGHT SOCKET ASSEMBLY POWER CORD WIRE HARNESS KNOCKOUT JUNCTION BOX...
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Page 17: Gas Information
Gas Information A. Fuel Type C. Gas Connection Check gas type: The gas supply must be the same as • Reference Section 3 for location of gas line access in stated on the appliance rating plate. If the gas supply is appliance. -
Page 18: Finishing
Finishing A. Facing Material NOTICE: Surface temperatures around the firebox will WARNING! Risk of Fire! Metal front faces may be cov- become warm while the firebox is in operation. Ensure ered with non-combustible materials only. finishing materials used for all surfaces (floor, walls, mantels, etc.) will withstand temperatures up to 190°F. -
Page 19: Decorative Fronts
C. Decorative Fronts Combustible or Non-Combustible Mantel Legs or Wall Projections Only decorative fronts certified for use with this firebox model may be used. Contact your dealer for a list of deco- rative fronts that may be used. Gray area is 6.00”... -
Page 20: Tv Good Faith Guidelines
D. TV Good Faith Guidelines Good Faith Guidelines for TV Installa�on’s above a Typical Gas Fireplace Combus�ble Mantel inch 17.00 mm 432 Non-Combus�ble Mantel TV recessed into the wall TV on the wall inch 12.00 mm 305 6" Min. 24" Min. 24"... -
Page 21: Firebox Setup
Firebox Setup D. Adjustable Firebox Supports A. Remove the Shipping Materials This firebox is provided with adjustable supports to allow Remove the shrink film, corrugated top cap, bottom cap for proper support of the firebox bottom and reduced sag- and column protectors from the firebox. ging caused by heavy concrete logs. - Page 22 1. Pull Lower Access Panel forward to disengage from 3. Rotate the right and left firebox support towards the Firebox Bottom, set aside. See Figure 8.4. center until screw holes align and reinstall (2) screws previously removed. See Figure 8.6. Figure 8.4 Figure 8.6 2.
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Page 23: Reference Materials
Reference Materials A. Optional Accessories Outside Air Door Flexible Duct (not supplied) ID4 Insulated Duct 4 in. (102 mm) 42 in. (1067 mm) UD4 Uninsulated Duct 4 in. (102 mm) Outside Air Collar Wire Ties 42 in. (1067 mm) ID4 4 in. Insulated Duct Outside Air Hood UD4 4 in. -
Page 24: Contact Information
B. Contact Information – NOTES – Monessen, a brand of Hearth & Home Technologies 7571 215th Street West, Lakeville, MN 55044 www.monessenhearth.com Monessen • BUF32/36/42 Installation Manual • 4139-901 • Rev A • 01/21...
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