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UNVENTED VENT-
FREE FIREBOXES
INSTALLATION AND OPERATING
INSTRUCTIONS
MODELS:
BUF400
BUF500
WW ARNINGS ARNINGS
For use with a listed gas-fired
unvented decorative room heater WARNINGS
If the information in this manual is not followed
not to exceed 40,000 BTU/hr. Do
exactly, a fire or explosion may result causing
Not Build a Wood Fire.
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 propert
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CONTENTS Important Safety Information ................................. 3 Canopy and Radiant Face Plates Installation ......13 Product Features ......................................................5 Other Optional Equipment .....................................14 Before You Start .....................................................5 Forced Air Kit .......................................................14 Brass or Chrome Louvers ....................................14 General Installation I
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IMPORTANT SAFETY INFORMATION INSTALLER OWNER Please leave these instructions with the appli- Please retain these instructions for future refer- ance. ence. IMPORTANT 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. • Do not allow fans
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IMPORTANT SAFETY INFORMATION Continued from page 3 23. Do not use this room heater if any part has been under water. Immediately call a qualified service 15. An unvented gas-fired heater uses air (oxygen) technician to inspect the room heater and to replace from the room in which it is installed. Provisions for any part of the control system and any gas control adequate combustion and ventilation air must be which has been under water. provided. See installation guidelines. 24. Never bu
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PRODUCT FEATURES Do not attempt to burn solid wood fuels, vented gas log sets, or any other combustible in this unvented firebox. Also, do not install a vent-free gas log set in this firebox if the minimum clearance and height requirements of the log set are too large for the firebox. 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 sy
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GENERAL INSTALLATION INFORMATION In planning the installation for the appliance it is necessary to determine where the unit is to be installed and whether optional accessories are desired. Gas supply piping should also be planned. The following steps represent the normal sequence of installation. Each installation is unique, however, and might require a different sequence. 1. Position firebox prior to framing or into prepared framing. 2. Field wire main power supply to models with fan kit.
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1 BUF500: 41 /2" 1 BUF400: 35 /2" 3 BUF400: 20 /8" 3 BUF500: 26 /8" GENERAL INSTALLATION INFORMATION MINIMUM HEARTH DIMENSIONS Figure 2 - Minimum Hearth Dimensions LOCATION OF FIREBOX 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. • Locati
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42" Minimum 9" 9" Minimum Minimum CLEARANCES and 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. 1. Sidewall clearances: The clearance from the inside of the appliance to any combustible wall should not be less than 9". See Figure 4. 2.
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CLEARANCES and HEIGHT REqUIREMENTS 4. Mantel clearances: The canopy supplied with the unit 12" must be installed. If a combustible mantel is installed, it must meet the clearance requirements as shown in 10" Figure 5. 8" 6" 23" 21" 1 2 /2" 19" 16" 12" Figure 5 - Mantel Clearances 5. 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.
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FIREPLACE FRAMING Firebox framing can be built before or after the appliance is set in place. Construct firebox framing following Figures 8 through 1 1 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. When the firebox is installed directly on carp
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FIREPLACE FRAMING The fireplace must be installed giving full consideration to the clearance and height requirements identified in this manual. 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. Anchor firebox to the side framing members using 8d nails or other suitable fasteners. See F
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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. Remove the baseplate for ease of gas line installation. Remove three (3) screws along the front edge of the base-
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CANOPY INSTALLATION INSTALLING CANOPY A canopy is furnished with each firebox and MUST be installed for safe operation. See Figure 14. The firebox canopy must not be modified or replaced with a canopy that may be provided with the unvented decorative room heater. 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. Secure canopy to front of frame with screws provided. See Figure 13. Front Frame Cano
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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. The blower must be installed prior to the installation of the vent-free heater. The electrical connections must be made before the firebox is framed and enclosed in the finished walls. El
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ILLUSTRATED PARTS LIST ITEM DESCRIPTION qTY BUF400 BUF500 1 Canopy 1 26D4568 26D4706 2 Screen Panel 2 26D0131 26D0187 3 Screen Rod 2 26D0132 26D0133 4 Rear Refractory 1 61D0102 61D0107 5 Side Refractory 2 61D0101 61D0101 6 Bottom Refractory 1 61D0100 61D0106 7 Outside Air Kit 1 AK-4 AK-4 1 3 3 2 61D1013 15
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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. Never mount the combustion air inlet assembly in a garage or storage area where combustible fumes such as gasoline might be drawn into the fireplace. 3. Combustion air can be drawn from the crawl space under a house when an ad
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FOR USE OF OPTIONAL AK-4 OUTSIDE AIR KIT 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 DO NOT remove the 1. Remove the cover plate from the 4" outlet opening location on the left cover if the outside air or right outside of the fireplace. will not be connected. 2. Place the insulation ring between
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FOR USE OF OPTIONAL AK-4 OUTSIDE AIR KIT MODEL AK-4 COMBUSTION AIR ASSEMBLY (CONTINueD) Approximately 7. If the duct is the insulated type, push the insulation back from one 2" end of the duct approximately 2". See Figure 21. Duct Connector 8. Slip the exposed end of the duct over the starting collar on the fireplace . 9. Using the sheet metal screws provided, secure the duct end to the collar attached to the fireplace. Insulation 10. Nail or screw the combustion air assembly to the surfac
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61D1013 19
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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. BASIC WARRANTY MHSC warrants the components and materials in your gas appliance to be fre
