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MAGNUM 

Vent-Free Fireboxes

Models: 

MCUF36E-F, MCUF36D-R, 
MCUF42E-F, MCUF42D-R

 

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.

WARNINGS

Installation and 

Operating Instructions

264720
MCUF cover

–  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.

  • Immediately  call  your  gas  supplier 

from a neighbor's phone. Follow the 

gas supplier's instructions.

  • If you cannot reach your gas supplier, 

call the fire department.

–  Installation  and  service  must  be 

performed  by  a  qualified  installer, 

service agency or the gas supplier.

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  minimum  fireplace  size 

requirement.
DO NOT INSTALL AN AppLIANCE IN THIS 

FIREBOx UNLESS THIS FIREBOx MEETS 

THE  MINIMUM  DIMENSIONS  REqUIRED 

FOR THE INSTALLATION.

INSTALLER: Leave this manual with the appliance.

CONSUMER: Retain this manual for future reference.

26D4720  10/13  Rev. 11

Summary of Contents for MAGNUM MCUF36D-R

Page 1: ...ely call your gas supplier from a neighbor s phone Follow the gas supplier s instructions If you cannot reach your gas supplier call the fire department Installation and service must be performed by a qualified installer service agency or the gas supplier 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 instru...

Page 2: ...lation 10 Canopy Installation 11 Combustion Air 12 Optional Equipment 15 Brass or Chrome Trim 15 Optional Wide Canopy 15 Forced Air Kit 15 Replacement Parts 16 Warranty 19 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 befor...

Page 3: ...ater in a bathroom or bedroom 12 Correct installation of the logs proper location of the heater and annual cleaning are necessary to avoid potential problems with sooting Sooting resulting from improper installation or operation can settle on surfaces outside the fireplace See log placement instructions for proper installation 13 Avoid any drafts that alter burner flame patterns Do not allow fans ...

Page 4: ...er provisions for combustion air are provided the screen shall have an opening s for induction of combustion air 26 Do not fill spaces around the firebox with insulation or other materials These spaces must be maintained to prevent the firebox from coming in contact with com bustible materials Nous recommandons que nos appareils de chauffage au gaz soient installés et entretenus par des profession...

Page 5: ...ING SUPPLIES Phillips screwdriver Square Framing materials Hammer Saw and or sabersaw Tee joint Level Pipe wrench Measuring tape Pliers Electric drill and bits Fireplace surround materials noncombustible Caulking material noncombustible Piping complying with local codes Wall finishing materials Pipe sealant approved for use with propane L P G resistant to sulfur compounds Refer to the installation...

Page 6: ...K J J L 37 6M I Ref MCUF36 MCUF42 A 41Z v 47 B 36 42 C 18Z v 18Z v D 32 38 E 20C v 20C v F 27Z v 33Z v G 33M 39M H 41Z v 47Z v I 17C v 17C v J 48C v 53 K 68M 74M L 34Z x 37Z x Figure 1 Firebox and Framing Dimensions A B C D E FP2686 hearth dims Ref MCUF36E F MCUF36D R MCUF42E F MCUF42D R A 26Z v 25C v 32Z v 31C v B 15 14C v 15 14C v C 32B 31Z 38B 38Z D 25 25 25 25 E 20Z x 20Z x 20Z x 20Z x Figure ...

Page 7: ... The vent free firebox must be kept clear and free from these combustible materials FP2440 fireplace locations Figure 3 Possible Firebox Locations MINIMUM CLEARANCES 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 instal lation Failure to follo...

Page 8: ... the clearance requirements as shown in Figure 7a However if lower mantel height is desired refer to Figure 7b NOTE The Vermont Castings Group Barrington Cabinet Mantel Model series BWC300 BWC400 and BWC500 are specially designed to comply with all mantel temperature requirements Any custom built mantel must comply with all clearance requirements shown in this instruction manual 12 10 8 6 256O 12 ...

Page 9: ...r materials This could cause a fire 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 Figure 9 5 The canopy must be i...

Page 10: ... firebox A listed manual shutoff valve must be installed upstream of the appliance A union tee and plugged 1 8 NPT pres sure tapping point should be installed upstream of hte appliance IMPORTANT Install main gas valve equipment shutoff valve in an accessible location The main gas valve is for turning on or shutting off the gas to the fireplace A sediment trap may be upstream of the heater to preve...

Page 11: ...Figure 11 2 Align the canopy with the holes in the top frame 3 Replace the screws previously removed 4 Tighten side screws Make sure the canopy is level and secure WARNING The firebox canopy must not be modified or replaced with a canopy that may be provided with the unvented decorative room heater WARNING Close fireplace screen panel before operating a decorative type unvented room heater FP2695 ...

Page 12: ... or garage space 5 Locate air supply inlet at least 3 away from any ap pliance vent terminal 6 Avoid extremely long runs and numerous turns in the duct leading from the fireplace to the combustion air assembly These conditions increase the resistance to the free flow of air through the duct Refer to Figures 12 through 15 for methods of installing the outside air for combustion assemblies FP2843 OA...

Page 13: ...clamp or screws Figure 17 WARNING DO NOT remove the cover if the outside air will not be connected FP1900 OA start collar 8 08 Figure 16 Attach Outside Air Starting Collar and Insulation Ring to Left Side of Fireplace Insulation Ring AK 4 Starting Collar Sheet Meal Screws Left Side of Fireplace Shorter End of Air Starting Collar FP2700 OA duct Screws Air Starting Collar Duct Left Side of Fireplace...

Page 14: ... the wall NOTE If the wall covering is brick or stone use appropriate masonry fasteners If necessary splice the duct Use a model 403 duct connector to splice duct sections Install model 403 duct connector 1 Push insulation back approximately 2 from the end of each duct 2 Slip each duct over duct connector until an equal length of connector extends into each duct 3 Place duct clamp over the end of ...

Page 15: ...electric codes Electrical connections should only be performed by a qualified licensed electrician main power must be off when connecting to main electrical power supply or performing service The blower when installed must be electrically grounded in accordance with local codes or in the absence of local codes with the National Electrical Code ANSI Z 223 1 NFPA 70 WARNING WARNING This fireplace ha...

Page 16: ...Right Side Brick 1 20302359 71D3011 20302359 71D3011 4b Rear Brick 1 20302360 71D3010 20302365 71D3504 4c Left Side Brick 1 20302361 71D3012 20302361 71D3012 Accessories 1 Standard Brass Canopy 1 BRCU36 BRCU36 BRCU42 BRCU42 1 Wide Brass Canopy 1 BRC36 BRC36 BRC42 BRC42 5 Blower w Rheostat 1 BLOTMC BLOTMC BLOTMC BLOTMC 6 Brass Trim Curved Design 1 BRTKM36 BRTKM36 BRTKM42 BRTKM42 6 Pewter Trim Curve...

Page 17: ...17 26D4720 MCUF Series Vent Free Firebox ...

Page 18: ...26D4720 18 MCUF Series Vent Free Firebox ...

Page 19: ...on instructions The Limited Lifetime Warranty will also be void if the appliance is not operated and maintained according to the operating instructions supplied with the appliance and does not extend to 1 firebox burner assembly damage by accident neglect misuse abuse alteration negligence of others including the installation thereof by unqualified installers 2 the costs of removal reinstallation ...

Page 20: ...Vermont Castings Group 149 Cleveland Drive Paris Kentucky 40361 www vermontcastingsgroup com ...

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