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15

  The distance to be maintained from the surfaces of the 

fireplace to combustibles must be observed. Below is a list of 

the most common  combustible materials to name a few:

Drywall   

Wood flooring 

 

Plywood

Sub-flooring 

Wood Framing   

Particle board

Mill board 

Plywood paneling

Maintain the following clearances:

• 

Unit sides, rear, Dome sides, rear & top: 

     2” (51 mm)

• 

Combustible Floors (MFP-33,39,44,49): 

     6” (152 mm)

• 

Combustible Floors (MFP-63 only): 

     8” (203 mm)

• 

Combustible Sheathing above opening top:    18” (203 mm)

• 

Sheathing or trim to opening sides: 

     8” (203 mm)

• 

Mantel above opening: 

     (see Fig.17)

• 

Opening to sidewall: 

   24” (609 mm)

• 

Hearth extension beyond front:  

   20” (508 mm)

• 

Hearth extension beyond sides:  

   12” (305 mm)

• 

Insulation from firebox:  

     2” (51 mm)

16"

10"

NON-COMBUSTIBLE

ONLY ZONE

18"

20"

22"

1 1/2"

3"

6"

8"

10"

SAFE ZONE FOR

PROJECTION OF

COMBUSTIBLE

MATERIAL

TOP OF FIREPLACE OPENING

MANTEL

LINTEL

FRONT

FIREPLACE

DOME TOP

Figure 17

Understanding Clearance to Combustibles

  There is a build-up of a considerable amount of radiant heat 

on the outer surfaces of the Mason-Lite Fireplace. It’s  critical 

that proper clearances to combustibles be maintained so that 

this radiant heat is maintained to safe limits.

Combustible Floor Clearances

  These Mason-Lite Fireplaces have been designed with 

clearance to combustible floors as indicated in Page 18. Cover 

any part of the combustible floor system left exposed with 1” 

(one inch) thick ceramic fiber insulation rated up to 2,100° F.

Attention:

 It is critical to abide by the clearances listed in this 

manual for all components specified as it allows for movement 

of hot air from the fireplace into interior areas of the chimney 

chase. Also, be certain that the chimney system be installed 

as stated below. 

Prior to starting the installation,  check with 

local, regional or state codes for any restrictions or required 

permits regarding your fireplace installation.

Mason-Lite Fireplace & Chimney System

1)  The Mason-Lite is designed to be installed with a listed 

UL103 - Class A, Metal Chimney System.

2) 

This Mason-Lite fireplace is intended as a supplemental 

heat source only. It is not intended as a primary heat 

source.

3)  It is the responsibility of the contractor installer (not the 

manufacturer) to ensure that adequate combustion air is 

provided  for  proper  function  of  this  fireplace.  Fireplaces 

take up a large volume of replacement air from outside the 

house and if the house is of airtight construction, smoke 

spillage may occur if proper draft is not achieved.

4)  There are many conditions beyond the manufacturer’s 

control  regarding  improper  fireplace  operation.  The 

manufacturer cannot ensure “smoke free” operation, 

nor can the manufacturer take on the responsibility for 

problems with surrounding construction; chimneys that 

have not been built at the correct heights;  system drafts 

caused by faulty mechanical systems; adverse weather 

conditions or any other environmental situations over 

which the manufacturer has no control.

5) 

Inspect all fireplace & chimney components for evidence 

of damage prior to starting installation. Consult your local 

distributor for replacement parts if necessary.

6)  Under no circumstances should you make any adjustments 

or  modifications  to  the  chimney  system  during  the 

installation procedure. If you do, you are not only liable 

for negating the warranty, but you could very well cause a 

serious malfunction of the fireplace. You must follow these  

chimney  instructions.

7)  Caution is urged if it is decided to add insulation material to 

any part of the Mason-Lite Fireplace or Chimney  system, 

be certain that the insulation material is kept at least 2” 

(two inches) away from any part of the system. When using 

insulation or vapor barrier materials, cover with a layer of 

plywood, particle board or gypsum board to maintain the 

specified 2” (two inch) clearance.

8) 

Air spaces around firebox must remain open. DO NOT fill 

these open spaces with insulation or packing material of 

any kind.

Chimney System Heights

When installed, the 

maximum

 overall height of the chimney 

system from bottom of fireplace to the top/termination chimney 

is 40 feet. The 

minimum

 installed height of the completed 

Chimney System is 14 feet with a straight flue stack, 17 feet if 

the chimney includes one or two offset sections.

Clearances to Combustibles

Содержание MFP-33

Страница 1: ...OR LOCAL DISTRIBUTOR SAVE THIS BOOK This book is valuable In addition to instructing you on how to install and maintain your appliance it also contains information that will enable you to obtain replacement parts or accessory items when needed Keep with your other important papers Do not store gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance REV OCT 201...

Страница 2: ...THIS PAGE INTENTIONALLY BLANK ...

Страница 3: ...T REMOVE THIS LABEL WARNING Use only approved listed Chimney Pipe as follows MFP33 39 44 UL103 12 Class A DM12 12 FMI 12 chimneys MFP49 UL103 14 Class A Please refer to pipe manufacturer s installation instructions Chimney Height Max 40 ft Min 14 ft 17 ft with 1 or 2 offset sections maximum WARNING THIS FIREPLACE HAS NOT BEEN TESTED WITH AN UNVENTED GAS LOG SET TO REDUCE THE RISK OF FIRE OR INJURY...

Страница 4: ...s Non Combustible Floor Systems 3 7 14 2 13 8 4 9 5 6 15 21 16 12 1 10 11 1 11 19 25 5 14 15 13 17 10 18 20 12 9 17 2 21 16 3 4 6 7 8 A 24 22 SCALE 1 8 DETAIL A 23 See Page 16 thru 18 for combustible floor and framing anchoring illustrations Figure 2 Figure 1 ...

Страница 5: ...P33 6A LINTEL FRONT 1 9 MFP33 6B T BAR STEEL 1 10 MFP49 7 DOME SIDE LOWER 2 11 MFP49 8 DOME SIDE UPPER 2 12 MFP33 9 DOME TOP 1 13 MFP33 10 DOME FRONT REAR 2 14 MFP521 RATING PLATE 1 15 NOT SUPPLIED 12 INCH DAMPER ANCHOR PLATE 1 16 NOT SUPPLIED ANCHOR PLATE INSULATION 1 17 MFP4 AK OUTSIDE AIR KIT 4 DIA 1 18 MFPB33 METAL BASE 6 INCH HIGH 1 19 NOT SUPPLIED CEMENT BOARD 1 20 MFPSB ASSY FLOOR JOIST BRA...

Страница 6: ...tems Non Combustible Floor Systems 20 DETAIL A 21 SCALE 1 8 22 18 3 1 11 12 10 3A 8 13 9 4 6 7 19 6B 5 6A 2 14 3 14 17 1 6A 4 6B 7 12 13 16 19 9 8 5 10 6 3A 11 2 15 A Figure 3 Figure 4 See Page 16 thru 18 for combustible floor and framing anchoring illustrations ...

Страница 7: ... 1 6A MFP39 6A MFP44 6A MFP49 6A LINTEL FRONT 1 6B MFP39 6B MFP44 6B MFP49 6B T BAR 1 7 MFP39 7 MFP44 7 MFP49 7 DOME SIDE LOWER 2 8 MFP39 8 MFP44 8 MFP49 8 DOME SIDE UPPER 2 9 MFP39 9 MFP44 9 MFP49 9 DOME TOP Ø12 DOME TOP Ø12 DOME TOP Ø14 1 10 MFP39 10 MFP44 10 MFP49 10 DOME FRONT REAR MIDDLE 2 ITEM P N DESCRIPTION QTY 11 MFP521 RATING PLATE 1 12 NOT SUPPLIED ANCHOR PLATE 1 FIBERGLASS INSU LATION ...

Страница 8: ...5 2 15 8 14 11 9 8 13 1 20 4 14 3 3A 10 18 2 19 16 1A 17 15 6 5 12 7 2 A See Page 16 thru 18 for combustible floor and framing anchoring illustrations MFP 63 Fireplace Parts Diagrams Combustible Floor Systems Non Combustible Floor Systems Figure 6 Figure 6 ...

Страница 9: ...4 DOWN DRAFT DIVERTER 2 PC 1 set 5 MFP63 5 DOME REAR LOWER 1 6 MFP63 6 LINTEL 1 7 MFP63 7 DOME SIDE LOWER UPPER 4 8 MFP63 8 DOME SIDE MIDDLE 2 9 MFP63 9 DOME TOP FOR 16 CLASS A CHIMNEY 1 10 MFP63 10 DOME FRONT REAR MIDDLE 2 11 MFP63 11 DOME FRONT REAR UPPER 2 12 MFP521 RATING PLATE MFP63 1 13 NOT SUPPLIED Ø16 DAMPER ANCHOR PLT 14 NOT SUPPLIED INSULATION BLANKET 15 MFP4 AK 4 INCH DIA OUTSIDE AIR KI...

Страница 10: ...is on combustible floor the total fireplace height will increase ALL DIMENSIONS ARE IN INCHES ALL DIMENSIONS ARE MINIMUM MORTAR THICKNESS MAY ADD A TOTAL OF UP TO 1 INCH TO THE OVERALL HEIGHT Important 2 inch minimum clearance to combustibles from the Dome Top must be maintained Note MIN 46 68 1 2 9 1 2 B B A A SECTION B B 38 1 8 30 1 4 15 4 1 2 35 7 3 4 3 7 3 4 SECTION A A 67 63 62 52 1 2 23 7 21...

Страница 11: ... combustibles from the Dome Top must be maintained Note If your installation is on combustible floor the total fireplace height will increase due to the addition of the required metal platform SECTION J J REFRACTORY LINING NOT SHOWN B C 4 1 4 10 A 4 E 23 Fireplace Overall Dimensions MFP 39 44 49 Fireplace Overall Dimensions Model A B C D E F MFP 39 43 39 28 1 2 27 38 Ø12 1 4 MFP 44 48 44 33 1 2 32...

Страница 12: ...gure 11 WARNING Failure to position the parts in accordance with these diagrams or failure to use only parts specifically approved with this appliance may result in property damage or personal injury Fireplace Framing Dimensions Model W MFP 33 41 MFP 39 47 MFP 44 52 MFP 49 57 MFP 63 71 MAINTAIN THE 2 CLEARANCE TO COMBUSTIBLES ABOVE THE DOME DO NOT ATTACH COMBUSTIBLE MATERIALS ON TOP OF THE DOME 1 ...

Страница 13: ...ion You will note that there will be a gap between the fireplace front and the extension of the non combustible hearth material Be certain that you seal this with non combustible material 1 8 MIN 2 MIN 2 MIN 8 MIN 1 0 MIN 8 MIN 1 0 MIN NON COMBUSTIBLE FACING MATERIAL HEARTH EXTENSION Not provided as part of fireplace NON COMBUSTIBLE Not provided as part of fireplace or sold by MFI A MINIMUM CLEARA...

Страница 14: ...E TO COMBUSTIBLES SECTION A A DET C MAINTAIN 2 CLEARANCE TO WOOD FRAMING MAINTAIN 2 CLEARANCE TO WOOD FRAMING METAL PLATFORM H3 METAL PLATFORM H3 NON COMBUSTIBLE FLOOR H2 1 2 CEMENT BOARD 1 2 CEMENT BOARD H5 1 INCH THICK CERAMIC FIBER INSULATION BLANKET FLOOR JOIST BRACE MODEL W1 H1 H2 H3 H4 H5 MFP 33 41 32 1 2 56 1 4 7 39 1 2 63 1 4 MFP 39 47 40 1 2 64 1 4 7 47 1 2 71 1 4 MFP 44 52 40 1 2 64 1 4 ...

Страница 15: ...sonry Fireplace is a modular refractory masonry unit designed for field assembly The firebox is constructed using pre cast interlocking refractory blocks The blocks are then secured to each other using Mortar The system includes all parts necessary for the assembly of a complete masonry fireplace In addition to the basic enclosure a standard 1 1 8 thick high temperature refractory brick is require...

Страница 16: ...gth of the floor on which it rests Chimney system measurements Choice of materials and craftsmanship in fireplace and hearth finishing Figure 16 Typical Installations Internal Wall Installation Corner Installation Flush Installation Full Projection Installation Note that each of these topics will be covered in detail and that the installer is expected to understand each phase completely before goi...

Страница 17: ... intended as a supplemental heat source only It is not intended as a primary heat source 3 It is the responsibility of the contractor installer not the manufacturer to ensure that adequate combustion air is provided for proper function of this fireplace Fireplaces take up a large volume of replacement air from outside the house and if the house is of airtight construction smoke spillage may occur ...

Страница 18: ...ote that additional floor joists may be required to support the weight of the firebox and chimney Where the floor joists run parallel to the front of the firebox anchorage can be accomplished in like manner as shown in Figure 18 using blocking between the floor joist For floors supported by I Joists the method of anchorage is illustrated in Figures 19 and 20 Figure 23 illustrates the general arran...

Страница 19: ...cations Some chimney systems can weigh up to 50 lbs per lineal foot Table II Deflection Limits Construction L S or W D L1 Floor Members I 360 I 240 1 For wood structural members having a moisture content of less than 16 per cent at time of installation and used under dry conditions the deflection resulting from L 0 5D is permitted to be substituted for the deflection resulting from L D Note that M...

Страница 20: ...o strips are used make sure they overlap at least two inches in the middle The strip is placed about 2 into the underside of the platform at the front Note When using an on site constructed hearth extension you may use a sand cement grout between the hearth and extension instead 6 Metal Base MFP 33 39 44 49 The Mason Lite Metal Base ensures the minimum six inch clearance above combustible flooring...

Страница 21: ... 3 8 rebar x 26 long included with unit Six 6 ea All thread x 12 long with nuts and washers Metal base 6 inch MFP39 Six 6 pieces 3 8 rebar x 34 long included with unit Six 6 ea All thread x 12 long with nuts and washers Metal base 6 inch MFP44 49 Eight 8 pieces 3 8 rebar x 34 long included with unit Eight 8 ea All thread x 12 long with nuts and washers Metal base 6 inch MFP 63 Ten 10 pieces 3 8 re...

Страница 22: ...either side depending on which side is accessible to outside combustion air all diagrams in this manual show the combustion air inlet hole on the right side Prepare side wall and rear wall mating surfaces with the prepared mortar and begin assembly 7 Keep the assembly of the next sections of the firebox side walls moving up keeping components moist mixing mortar as you need it and threading the mo...

Страница 23: ...ctions given previously for using MASON LITE mortar Stop to look at the smoke dome side front and rear walls to see that they are aligning correctly and that the surfaces are smooth and uniform Make sure connections are covered with an adequate amount of mortar Remember that you have the option of using shims but they must be removed and any holes filled Make any adjustments to the fireplace align...

Страница 24: ...face lines up with the inward angles of the lintel sides Resulting top surfaces should be level 18 Verify that the Smoke Dome side front and rear walls are aligning correctly and that mating surfaces are smooth and uniform Make sure connections are covered with an adequate amount of mortar Remember that you have the option of using shims but they must be removed and any holes filled Make any adjus...

Страница 25: ...o the remaining Hearth except this time apply beading on surface to be facing floor as shown in Figure 42 26 Before installing side walls confirm placement of outside combustion air access if required this can be installed either side depending on which side is accessible to outside combustion air all diagrams in this manual show the combustion air inlet hole on the right side 27 Prepare side wall...

Страница 26: ...he base plate Once leveled fill any resulting gaps with mortar Important Adjustments can only be made while the mortar is still wet when correcting for squareness and leveling 33 Assemble Dome Sides MFP63 7 as shown in Figure 49 The beveled face lines up with the inward angles of the lintel sides Top surfaces should be level 34 Position Middle Domes MFP63 10 so that outer faces are flush to the lo...

Страница 27: ... Dome Top MFP63 9 into position Be sure that it is flush in every direction as you place it on the crest of the smoke dome wall assembly Note that the chimney hole on the Dome Top is not centered from front to back it should be offset closest to the rear of the fireplace see Figure 52 Figure 52 Center of Ø16 chimney hole is offset towards the rear 10 12 1 2 MFP 63 39 Now that you have completed th...

Страница 28: ...ection If using Masonry Chimney consult your local codes Figure 56 Optional Damper Support Sides Optional Damper Plate by others Optional Damper Support Rear Attention Clearance to combustible construction cannot be reduced during course of construction For the safe operation of the finished fireplace these clearances must be followed when building the framework for the chimney system Note that th...

Страница 29: ... firebrick may crack see Figure 60 The pattern for the firebrick lining is exclusively your choice Before you install the lining remember to consider any holes your contractor may need to drill for gas electrical or combustion air kit access holes Please use a certified mason to lay in the brick He will follow the proper instructions from the fireplace liner manufacturer and also understand the ty...

Страница 30: ...d MFI cannot be responsible for the make up of material on the exterior of the fireplace you have chosen nor can MFI be held responsible for the materials in a room that may be responding negatively to heat However in almost all cases there is a solution to the problem either by making adjustments to airflow or the modifications to the room itself Installing Outside Air The Mason Lite Fireplace ne...

Страница 31: ...fill the chimney enclosure LINEAL GAIN PART NO DESCRIPTION GAIN Mason Lite Fireplace 66 1 2 12 12DM Pipe Section 10 5 8 12 12HT 18 12DM Pipe Section 16 5 8 18 12HT 24 12DM Pipe Section 23 5 8 24 12HT 36 12DM Pipe Section 34 5 8 36 12HT 48 12DM Pipe Section 46 5 8 48 12HT RLT 12D Round Termination 7 3 4 RLT 12HT STL 12D Square Chase Top with Slip Section 7 to 15 The lineal gain for the terminations ...

Страница 32: ...in the fireplace under any circumstances First Lighting of the Mason Lite After construction is completed all elements of the fireplace and chimney system must be completely dry This means that the unit must stand without any firing for a minimum of 28 days Only after that period of time can a first lighting take place The first fire must be small and well controlled started with a small amount of...

Страница 33: ...the top of the section downward to the elbow Then clean from the firebox up to the offset return section Make sure to cover the floor of the fireplace and out to the hearth with a damp sheet that has been taped securely in place When all the soot has settled remove the sheet and vacuum up Don t sweep the excess soot Never use any chemical cleaners when cleaning the chimney system since their resid...

Страница 34: ...oncrete slab The concrete strength and durability shall comply with Sections 1903 1904 and 1905 of the International Building Code IBC TABLE R402 2 MINIMUM SPECIFIED COMPRESSIVE STRENGTH OF CONCRETE MINIMUM SPECIFIED COMPRESSIVE STRENGTH a f c Weathering Potential b TYPE OR LOCATION OF CONCRETE CONSTRUCTION Negligible Moderate Severe Basement walls foundations and other concrete not exposed to the...

Страница 35: ...ely b Lines defining areas are approximate only Local conditions may be more or less severe than indicated by region classification A severe classification is where weather conditions result in significant snowfall combined with extended periods during which there is little or no natural thawing causing deicing salts to be used extensively ...

Страница 36: ...n this warranty makes MFI or any affiliate thereof liable in any respect for any injury or damage to the building or structure in which the fireplace has been installed or to the persons or property therein arising out of the use misuse or installation of properly manufactured MFI products The fireplace must be used in accordance with operating instructions The grate or andirons must be installed ...

Страница 37: ...Masonry Fireplace Industries LLC 6391 Jurupa Ave Riverside CA 92504 ...

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