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Installation & Owner’s Manual

Installation, Care and Operation

INSTALLER:  Leave this manual with party responsible for use and operation.

OWNER:  Retain this manual for future reference.

VENT FREE FIREBOX

Model(s):

BUF36, BUF36-R 

BUF42, BUF42-R

NOTICE: DO NOT

 discard this manual!

• 

DO NOT

 store or use gasoline or other flam

-

mable 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 com

-

bustibles as specified. Failure to comply may 

cause house fire.

   WARNING: If the information in these 

instructions is not followed exactly, a fire 

or explosion may result causing property 

damage, personal injury, or death.

WARNING

HOT SURFACES

Glass and other surfaces are hot during 

operation AND cool down.

Hot glass will cause burns.

• 

DO NOT

 touch glass until it is cooled

•  NEVER allow children to touch glass

•  Keep children away

•  CAREFULLY  SUPERVISE  children  in  same  room  as 

fireplace.

•  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.

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 and service of this appliance should be performed by 

qualified personnel. Hearth & Home Technologies recommends 

HHT Factory Trained or NFI certified professionals.

1

Monessen • BUF36/42 Installation and Operating Manual • 4600-900 • Rev E • 09/17

Summary of Contents for BUF36

Page 1: ...other surfaces are hot during operation AND cool down Hot glass will cause burns DO NOT touch glass until it is cooled NEVER allow children to touch glass Keep children away CAREFULLY SUPERVISE children in same room as fireplace Alert children and adults to hazards of high temperatures High temperatures may ignite clothing or other flammable materials Keep clothing furniture draperies and other fl...

Page 2: ...rd Work Checklist 3 1 Welcome A Congratulations 4 B LIMITED LIFETIME WARRANTY 5 2 Important Safety and Operating Information 6 3 General Installation Information Before You Start 8 Check Parts 8 Tools Needed for Installation 8 4 Firebox and Framing Dimensions Dimensions 9 5 Hearth Dimensions and Firebox Locations Hearth Dimensions 10 Firebox Locations 10 6 Clearances 11 7 Fireplace Canopy and Gas ...

Page 3: ... for your file Combustible materials not installed in non combustible areas Builder Gen Contractor Installer Date Comments Further description of the issues who is responsible Installer Builder Other Trades etc and corrective action needed That this checklist remain visible at all times on the fireplace until the installation is complete __________________________ by ______________________on _____...

Page 4: ...elcome to the Monessen family of fireplace products 1 Welcome Monessen is a registered trademark of Hearth Home Technologies Brand _________________________________________________ Model Name ____________________________ Serial Number ___________________________________________ Date Installed ___________________________ Fireplace Information Local Dealer Information DEALER Fill in your name addres...

Page 5: ...es not extend to 1 firebox burner assembly damage by accident neglect misuse abuse alteration negligence of others including the installation thereof by unquali fied installers 2 the costs of removal re installation or transportation of defective parts on the appliance or 3 incidental or consequential damage All service work must be performed by an authorized service representative This warranty i...

Page 6: ...ter in a bathroom 12 Do not install the unvented heater in a bedroom unless the maximum input rating is equal to or less than 10 000 Btu hr 13 Correct installation of the ceramic fiber logs proper location of the heater and annual cleaning are neces sary to avoid potential problems with sooting Sooting resulting from improper installation or operation can settle on surfaces outside the fireplace S...

Page 7: ...m heater if any part has been under water Immediately call a qualified service technician to inspect the room heater and to replace any part of the control system and any gas control which has been under water 25 Never burn solid fuels in a fireplace where a unvented room heater is installed 26 Always have a fireplace screen in place when the appliance is in operation and unless other provisions f...

Page 8: ...PLIES Phillips screwdriver Square Framing materials Hammer Saw and or saber saw Tee joint Level Pipe wrench Measuring tape Pliers Electric drill and bits Fireplace surround materials noncombustible Caulking material noncombustible Wall finishing materials Piping complying with local codes Pipe sealant approved for use with propane L P G resistant to sulfur compounds Refer to the installation instr...

Page 9: ...37 1 2 24 25 1 4 J 8 3 4 7 37 1 4 3 3 3 3 4 13 3 4 7 1 8 Ref BUF36 BUF36 R BUF42 BUF42 R A 42 48 B 36 42 C 28 1 4 30 3 4 D Chase Installation 42 1 2 48 1 2 D Recessed Installation 42 3 4 48 3 4 E 52 56 5 8 F 71 1 2 74 1 2 G 36 3 4 38 7 8 Figure 4 1 Firebox and Framing Dimensions 9 Monessen BUF36 42 Installation and Operating Manual 4600 900 Rev E 09 17 ...

Page 10: ...r drafty areas DO NOT INSTALL WHERE CURTAINS FURNITURE CLOTHING OR OTHER FLAMMABLE OBJECTSARE LESS THAN 42 FROM FRONT OF HEATER Never obstruct the front opening of the vent free firebox or restrict the flow of combustion and ventilation air Minimize modifications to existing construction Refer to Figure 5 2 for location suggestions Do not install in the vicinity where gasoline or other flammable l...

Page 11: ... be placed against a combustible back wall 9 Minimum 42 Minimum 9 Minimum FP2687 minimum clearances FP2687 4 Mantel clearances If a combustible mantel is installed it must meet the clearance requirements as shown in Figures 6 2 6 3 12 10 8 6 2 12 16 19 21 23 FP2690 Mantel clearances Combustible Material Can Contact Top of Fireplace FP2690 Noncombustible Material Only if Needed to Cover Radiant Top...

Page 12: ...nstalled at Base of Fireplace Firebox framing can be built before or after the appliance is set in place Construct firebox framing following Figure 4 1 for your specific installation requirements Refer to Figure 4 1 on page 9 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 o...

Page 13: ... furnished with each firebox and MUST be installed for safe operation 1 Locate three 3 holes one at each end and one in center of canopy and attach to face of unit with supplied screws Figure 7 2 WARNING The firebox canopy must not be modified or replaced with a canopy that may be provided with the vent free decorative room heater WARNING Close fireplace screen panel before operating a decorative ...

Page 14: ... the supply tank pressure to 13 w c maximum Any copper tubing used to supply propane L P G from the tank must be internally tinned NOTE When connecting propane L P G vent free room heaters you must use pipe sealant resistant to propane L P G IMPORTANT Hold heater regulator with a wrench to prevent movement when connecting to inlet piping Check gas type The gas supply must be the same as stated on ...

Page 15: ...om attic space or garage space 5 Locate air supply inlet at least 3 away from any appliance 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 8 1 through 8 4 for methods of installing the outside air for combustion assem...

Page 16: ...th the building s outside 3 Install hooded air inlet in the sidewall of the structure 4 Assemble the flexible duct ID4 or UD4 not supplied between the collar and the hooded air inlet Secure it into position with the supplied wire ties Outlet placed higher than 3 ft below the termination cap Attic space Garage or combustible liquids storage Outlet blocked by snow leaves etc Clear area outside house...

Page 17: ...rically grounded in accordance with local codes or in the absence of local codes with the National Electrical Code ANSI NFPA 70 REFRACTORY Optional refractory panels left right and back may be installed in the BUF36 and BUF42 NOTE The BUF36 R and BUF42 R models come standard with refractory installed If refractory is being installed please refer to the firebrick liner kit installation instructions...

Page 18: ...RT NUMBER 1 Canopy SRV4600 107 Refractory Assembly BUF36 R FBBUF36R 2 Rear Refractory SRV4600 700 3 Left Refractory SRV4600 701 4 Right Refractory SRV4600 702 5 Screen Assembly Spacer Qty 2 req SRV4600 109 Y 6 Screen Panel Qty 2 req SRV4600 020 Y Handle Screen 10002 Firescreen Ring Qty 9 req 11857B 7 Screen Rod Qty 2 req 12052 Y Junction Box 21878 Junction Box Cover Plate Qty 3 req 26548 Junction ...

Page 19: ...R 1 Canopy SRV4603 107 Refractory Assembly BUF36 R FBBUF42R 2 Rear Refractory SRV4603 700 3 Left Refractory SRV4600 701 4 Right Refractory SRV4600 702 5 Screen Assembly Spacer Qty 2 req SRV4600 109 Y 6 Screen Panel Qty 2 req SRV4603 020 Y Handle Screen 10002 Firescreen Ring Qty 9 req 11857B 7 Screen Rod Qty 2 req 12052 Y Junction Box 21878 Junction Box Cover Plate Qty 3 req 26548 Junction Box Brac...

Page 20: ...act Information NOTES Monessen a brand of Hearth Home Technologies 7571 215th Street West Lakeville MN 50044 www monessenhearth com 20 Monessen BUF36 42 Installation and Operating Manual 4600 900 Rev E 09 17 ...

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