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UNVENTED VENT-
FREE FIREBOXES
INSTALLATION AND OPERATING
INSTRUCTIONS
MODELS:
BUF400
BUF500
For use with a listed gas-fired
unvented decorative room heater
not to exceed 40,000 BTU/hr. Do
Not Build a Wood Fire.
Carefully review the instructions
supplied with the decorative type
unvented room heater for the mini-
mum fireplace size requirement.
DO NOT INSTALL AN APPLIANCE
IN THIS FIREBOX UNLESS THIS
FIREBOX MEETS THE MINIMUM
DIMENSIONS REqUIRED FOR
THE INSTALLATION.
If the information in this manual is not followed
exactly, a fire or explosion may result causing
If the information in this manual is not followed exactly,
property damage, personal injury or loss of life.
a fire or explosion may result causing property damage,
personal injury or loss of life.
– Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any
–
Do not store or use gasoline or other flammable
other appliance.
vapors and liquids in the vicinity of this or any other
appliance.
– WHAT TO DO IF YOU SMELL GAS
–
WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not try to light any appliance.
• Do not touch any electrical switch; do not use
• Do not touch any electrical switch; do not use any
• Immediately call your gas supplier from a
• Immediately call your gas supplier from a neighbor's
• If you cannot reach your gas supplier, call the fire
• If you cannot reach your gas supplier, call the
–
Installation and service must be performed by
– Installation and service must be performed by
a qualified installer, service agency or the gas
a qualified installer, service agency or the gas
supplier.
supplier.
READ AND SAVE THESE INSTRUCTIONS
WARNINGS
WARNINGS
WARNINGS
any phone in your building.
phone in your building.
neighbor's phone. Follow the gas supplier's
phone. Follow the gas supplier's instructions.
instructions.
department.
fire department.
61D1013 2/10 Rev. 8
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Summary of Contents for MHSC BUF400
- Page 1 UNVENTED VENT- FREE FIREBOXES INSTALLATION AND OPERATING INSTRUCTIONS MODELS: BUF400 BUF500 For use with a listed gas-fired unvented decorative room heater not to exceed 40,000 BTU/hr. Do Not Build a Wood Fire. Carefully review the instructions supplied with the decorative type unvented room heater for the mini- mum fireplace size requirement.
-
Page 2: Table Of Contents
CONTENTS Important Safety Information ... 3 Product Features ...5 Before You Start ...5 General Installation Information ...6 Firebox External Dimensions ...6 Minimum Hearth Dimensions ...7 Location of Fireplace ...7 Clearances and Height Requirements ...8 Fireplace Framing...10 Gas Line Installation ...12 Canopy and Radiant Face Plates Installation ...13 Other Optional Equipment ...14 Forced Air Kit ...14... -
Page 3: Important Safety Information
INSTALLER Please leave these instructions with the appli- ance. Read these instructions carefully before installing or trying to operate a vent-free gas heater in this firebox. • Any change to this heater or its controls can be dangerous. • Improper installation or use of the heater can cause serious injury or death from fire, burns, explosion or carbon monoxide poisoning. - Page 4 IMPORTANT SAFETY INFORMATION Continued from page 3 15. An unvented gas-fired heater uses air (oxygen) from the room in which it is installed. Provisions for adequate combustion and ventilation air must be provided. See installation guidelines. 16. Keep room area clear and free from combustible materials, gasoline and other flammable vapors and liquids.
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Page 5: Product Features
The BUF400 and BUF500 are vent-free fireboxes and feature a self contained heat-circulating system. This unit also features a 2-in1, flexible-face system that converts the circulating system into a radiant system in seconds. -
Page 6: General Installation Information
Install vent-free gas log heater per the instructions provided with the vent-free gas log heater. Complete finish wall material, surround and optional hearth extension to your individual taste. FIREBOX EXTERNAL DIMENSIONS " 2" " " 6" BUF400: 24 " BUF500: 30 " BUF400: 40" BUF500: 46" BUF400: 36" BUF500: 42"... -
Page 7: Minimum Hearth Dimensions
MINIMUM HEARTH DIMENSIONS Carefully select the best location for installation of your vent-free firebox. The following factors should be taken into consideration: • Clearance to side wall, ceiling, woodwork and windows. See “Clearances/Height Requirements on page 8. Minimum clearances to combustibles must be main- tained. -
Page 8: Clearances And Height Requirements
CLEARANCES HEIGHT REqUIREMENTS Ensure that minimum clearances shown in Figures 4 through 7 are maintained. Left and right clearances are determined when facing the front of the firebox. Follow these instructions carefully to ensure safe installation. Failure to follow these requirements may create a fire hazard. - Page 9 12" 10" 8" 6" " 12" Figure 5 - Mantel Clearances Floor clearance: This inner chamber firebox floor must be installed at least 5" above any combustible flooring material, such as carpeting or asphalt tile, which is closer than 14" to the base of the firebox. See Figure 6.
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Page 10: Fireplace Framing
FIREPLACE FRAMING Firebox framing can be built before or after the appliance is set in place. Construct firebox framing following Figures 8 through 11 and the chart below for your specific installation requirements. See Figure 1 on Page 6 for firebox dimensions. The framing headers may rest on the top of the firebox standoffs. The firebox may be installed directly on a combustible floor or raised on a platform of an appropriate height. - Page 11 1. Bend out the nailing flanges located on each side of the firebox. 2. Slide the firebox into prepared framing or position firebox in its final position and frame later. 3. Level the firebox by checking the top edge of the firebox. Shim if necessary. 4.
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Page 12: Gas Line Installation
GAS LINE INSTALLATION Plumbing connections should only be performed by a qualified, licensed plumber. Main gas supply must be off when plumbing gas line to fireplace or performing service. Consult all local codes. All gas piping must be installed to comply with local codes, or in the absence of local codes, with the latest edition of the National Fuel Gas Code ANSI Z223.1/NFPA54. -
Page 13: Canopy And Radiant Face Plates Installation
INSTALLING CANOPY A canopy is furnished with each firebox and MUST be installed for safe operation. See Figure 14. 1. Locate three (3) holes at the top of the front frame. See Figure 13. 2. Align the canopy with the holes in the top of the frame. 3. -
Page 14: Other Optional Equipment
OPTIONAL EqUIPMENT FORCED AIR KIT (FA2A) If you are installing the forced air kit, Model FA2A, see the installation instructions provided with the kit for electri- cal wiring requirements, or the blower installation section. The firebox must be connected to main power supply at time of firebox installation. -
Page 15: Illustrated Parts Breakdown
ITEM DESCRIPTION Canopy Screen Panel Screen Rod Rear Refractory Side Refractory Bottom Refractory Outside Air Kit 61D1013 BUF400 BUF500 26D4568 26D4706 26D0131 26D0187 26D0132 26D0133 61D0102 61D0107 61D0101 61D0101 61D0100 61D0106 AK-4 AK-4 ILLUSTRATED PARTS LIST... -
Page 16: Using Optional Outside Air Kit
FOR USE OF OPTIONAL AK-4 OUTSIDE AIR KIT COMBUSTION AIR 1. Locate combustion air assembly at an exterior location which is not likely to be accidentally blocked in any manner. Locate assembly a min. of 12" above the snow line to prevent blockage by snow accumulation. 2. - Page 17 The use of outside air for combustion is optional unless required by building codes. It is only necessary to supply outside combustion air to one side of the fireplace. Use the model AK4 combustion air kit. MODEL AK-4 COMBUSTION AIR ASSEMBLY 1.
- Page 18 FOR USE OF OPTIONAL AK-4 OUTSIDE AIR KIT MODEL AK-4 COMBUSTION AIR ASSEMBLY 7. If the duct is the insulated type, push the insulation back from one end of the duct approximately 2". See Figure 21. 8. Slip the exposed end of the duct over the starting collar on the fireplace.
- Page 19 61D1013...
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Page 20: Warranty
LIMITED LIFETIME WARRANTY POLICY The following components are warranted for life to the original owner, subject of proof of purchase: Firebox, Combustion Chamber, Heat Exchanger, Grate, and Stainless Steel Burners. FIVE YEAR WARRANTY The following components are warranted for 5 years to the original owner, subject of proof of purchase: Vent Free Ceramic Fiber Logs, Catalytic Filter and Aluminized Burners.
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