Installation and Operation

ManualsBrandsMajestic ManualsFire BoxesMCUF42D-R 42" Magnum Vent Free Firebox with Herringbone Firebrick, Radiant Design, CSA Design and Large Viewing Area













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

    





Installation and

Operating Instructions

264720

MCUF cover

 

     



 

  

  



      





  



     

    



      

     

Do Not Build a Wood Fire.



     

     







   







26D4720 10/13 Rev. 11

Summary of content (20 pages)

PAGE 1
MAGNUM Vent-Free Fireboxes Models: MCUF36E-F, MCUF36D-R, MCUF42E-F, MCUF42D-R WARNINGS If the information in this manual is not followed exactly, 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 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.
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MCUF Series Vent-Free Firebox CONTENTS PLEASE READ THE INSTALLATION & OPERATING INSTRUCTIONS BEFORE USING APPLIANCE. Thank you and congratulations on your purchase of a Vermont Castings Group Vent-Free firebox. IMPORTANT: Read all instructions and warnings carefully before starting installation. Failure to follow these instructions may result in a possible fire hazard and will void the warranty. Important Safety Information..................................................................................
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IMPORTANT SAFETY INFORMATION MCUF Series Vent-Free Firebox OWNER Please leave these instructions with the appliance. Please retain these instructions for future reference. WARNING INSTALLER • 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 to blow directly into the fireplace. Avoid any drafts that alter burner flame patterns.
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MCUF Series Vent-Free Firebox WARNING 20. Input ratings are shown in BTU per hour and are for elevations up to 2,000 feet. For elevations above 2,000 feet, input ratings should be reduced 4 percent for each 1,000 feet above sea level. Refer to the National Fuel Gas Code. 21. The appliance and its appliance main gas valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 psig (3.5 kPa). 22.
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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 MCUF36 and MCUF42 Series are vent-free fireboxes. They feature a self contained heat-circulating system. This installation manual will enable you to obtain a safe, efficient and dependable installation of your vent-free firebox.
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FIREBOX, HEARTH and FRAMING DIMENSIONS MCUF Series Vent-Free Firebox Min. Rough Opening Depth D F J I E C L H - Min. Rough Opening Width J K Min. Rough Opening Height 556M” 37 6M” 37 6 ” 3256 ” 2656M" 256O” 256O” Ref. A B C D E F G H I J K L MCUF36 41Z\v" 36" 18Z\v" 32" 20C\v" 27Z\v" 33M\," 41Z\v" 17C\v" 48C\v" 68M\," 34Z\x" 856M” 6” Figure 1 Firebox and Framing Dimensions G B A MCUF42 47" 42" 18Z\v" 38" 20C\v" 33Z\v" 39M\," 47Z\v" 17C\v" 53" 74M\," 37Z\x" 9 6M” A D E 264720 MCUF dim
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FIREBOX LOCATION and CLEARANCE REQUIREMENTS MCUF Series Vent-Free Firebox location of firebox MINIMUM CLEARANCES Carefully select the best location for installation of your vent-free firebox. The following factors should be taken into consideration: 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. • Clearance to side wall, ceiling, woodwork and windows.
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CLEARANCE and HEIGHT REQUIREMENTS MCUF Series Vent-Free Firebox 12” 10” 23” 8” 21” 6” Combustible Material 19” 256O” 16” 12” FP2688 6" Minimum Figure 5 Minimum Clearance above Combustible Flooring FP2842 Figure 7a Mantel Clearances FP2688 min floor combustible 12” 8” 14” FP2842 8” Mantel clearances FP2691 May be Less than 6" Noncombustible Material Figure 7b Mantel Clearances for Wide Profile Canopy Only FP2691 mantel clear wide canopy FP2689 14” Minimum Figure 6 Minimum Clearances ab
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FIREBOX FRAMING Firebox framing can be built before or after the appliance is set in place. Construct firebox framing following Figure 1. Refer to Figure 1 on Page 6 for firebox dimensions. The framing headers may rest on the top of the firebox. The firebox may be installed directly on a combustible floor or raised on a platform of an appropriate height.
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GAS LINE INSTALLATION 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 baseplate. Remove four (4) screws which secure the baseplate to the combustion casing (two at rear and one along each side). Replace baseplate prior to connecting gas line to heater.
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CANOPY INSTALLATION WARNING A canopy is furnished with each firebox and MUST be installed for safe operation. Figure 11 The firebox canopy must not be modified or replaced with a canopy that may be provided with the unvented decorative room heater. WARNING MCUF Series Vent-Free Firebox Close fireplace screen panel before operating a decorative type unvented room heater. 1. Remove the three (3) screws from the top front frame assembly. Also remove the two (2) screws on the side frames. Figure 11 2.
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OPTIONAL AK-4 OUTSIDE AIR KIT MCUF Series Vent-Free Firebox 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.
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WARNING OPTIONAL AK-4 OUTSIDE AIR KIT MCUF Series Vent-Free Firebox DO NOT remove the cover if the outside air will not be connected. Screws Air Starting Collar Duct 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.
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MCUF Series Vent-Free Firebox 7. If the duct is the insulated type, push the insulation back from one end of the duct approximately 2". Figure 19 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. 10.Nail or screw the combustion air assembly to the surface of the wall. NOTE: If the wall covering is brick or stone, use appropriate masonry fasteners. If necessary, splice the duct.
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OPTIONAL EQUIPMENT MCUF Series Vent-Free Firebox Brass or Chrome Trim Forced Air Kit (BLOTMC) If you are installing the forced air kit, Model BLOTMC, on MCUF36 or MCUF42 models, refer to the installation instructions provided with the kit for electrical 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.
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REPLACEMENT PARTS MCUF Series Vent-Free Firebox 4 4b 6 4c 4a 1 3 5 2 Ref. 1. 2. 3. 4. 4a. 4b. 4c. 1. 1. 5. 6. 6. 6. 7. 16 Description Qty.
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MCUF Series Vent-Free Firebox 26D4720 17
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MCUF Series Vent-Free Firebox 18 26D4720
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MCUF Series Vent-Free Firebox 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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Vermont Castings Group 149 Cleveland Drive • Paris, Kentucky 40361 www.vermontcastingsgroup.