Mason-Lite MFPST-43 User manual

Masonry Firebox
Model MFPST-43
Instructions
THIS WOOD-BURNING FIREPLACE COMPLIES WITH UL127 STANDARD AS A FACTORY-BUILT APPLIANCE.
AWARNING: THIS FIREPLACE IS APPROVED FOR USE AS A WOOD BURNING FIREPLACE.
IT HAS NOT BEEN TESTED ORAPPROVED FOR UNVENTED GAS LOGS.
AWARNING: IMPROPER INSTALLATION, ADJUSTMENT, ALTERATION, SERVICE OR MAINTENANCE CAN
CAUSE INJURY, PROPERTY DAMAGE OR LOSS OF LIFE. REFER TO THIS MANUAL FOR ASSISTANCE OR
ADDITIONAL INFORMATION. CONSULT A QUALIFIED INSTALLER 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.
Report No. 08-154
Do not store gasoline or other fl ammable vapors and
liquids in the vicinity of this or any other appliance.
REV 13 DEC 2009
ICC Evaluation Services
Report No. 2401

This page has been left intentionally blank.

1
MFPST43
MFI
rev
09_18
NOV
2009
C
CO ON NT TE EN NT TS
Fireplace Parts Diagram for Combustible Floors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . .Pg. 2
Fireplace Parts Diagram for Non-Combustible Floors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. .Pg. 3
Fireplace Overall & Framing Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 4
Fireplace Framing Dimensions (Combustible Floor Systems) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 5
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 6
Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 7
Clearance To Combustibles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 8
Mason-Lite Fireplace & Chimney System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . .Pg. 8
Supporting Floor Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 9, 10
Mason-Lite Weight Determination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 10
Mason-Lite™ Component for combustible floors: 8”Metal Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 11
Fireplace Assembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg.12 ~ 14
Firestop Radiation Shield . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 14
Mason-Lite™ Firebrick Liners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 15
Fireplace Finishes and Combustible Trim Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 16
Mantle and Mantle Shelf Clearances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 16
Installing Outside Air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 16
Adding a Gas Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 16
Adding Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 16
Mason-Lite Chimney Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 17
Installing Damper and Chimney System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 17
Fireplace Door Accessory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pg. 17
Mason-Lite Owner’s Operation & Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 18
Starting A Fire and Basic Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 18
Annual Fireplace Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 19
Customer Service & Parts Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 19
Appendix I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 20
Appendix II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Pg. 21
Below is a sample picture of the rating plate that is located inside the lower dome side of your
fi replace. Serial number and date
code should be stamped on the plate where required.
DO NOT REMOVE THIS LABEL
Masonry
Fireplace
Industries, LLC
315 WEST 3RD ST.
SANTA ANA, CA 92701
See MFI’s installation and operating instructions for
this model. Contact local building officials about
restrictions and installation specifications in your area.
DATE OF MFG. SERIALNo.
Report No.
08-154
ICC Evaluation
Services Report
No. 2401
MODEL
No.:
!
WARNING :
THIS FIREPLACE HAS
BEEN TESTED FOR USE
ONLY WITH APPROVED
GLASS DOORS. TO
REDUCE THE RISK OF
FIRE OR INJURY,
CONSULT OWNER’S
MANUAL.
!
THIS FIREPLACE IS
DESIGNED FOR USE
ONLY WITH SOLID WOOD
LOGS, PLUMBED LPG OR
NG LOG LIGHTERS OR
PLUMBEDANSI Z21.60
DECORATIVEGASLOGS.
Consultinstructions
included with this firebox
!
WARNING:
Use only approved, listed
UL103-16” I.D. Class A
Chimney System.
Please refer to pipe mfg.
installation instructions.
Chimney Height:
Max.: 40 ft.
Min.: 14 ft.
(17 ft. with 1 or 2 offset
FIREPLACE CLEARANCES TO COMBUSTIBLES:
UNIT FRONT, SIDES, REAR.............................................2” (50 mm)
COMBUSTIBLE FLOOR....................................................8” (200 mm)
COMBUSTIBLE SHEATHING ABOVE OPENING TOP.....8” (200 mm)
SHEATHING OR TRIM TO OPENING SIDES...................8” (200 mm)
MANTLE ABOVE OPENING...........................................12” (300 mm)
OPENING TO SIDE WALL..............................................24” (600 mm)
HEARTH EXTENSION BEYOND FRONT.......................20” (500 mm)
HEARTH EXTENSION BEYOND SIDES........................12” (300 mm)
INSULATION FROM FIREBOX.........................................2” (50 mm)
for further information.
sections maximum) MANTEL CLEARANCES MANTEL ABOVE OPENING:
THIS APPLIANCE NEEDS FRESH AIR FOR SAFE OPERATION AND MUST BE INSTALLED
SO THERE ARE PROVISIONS FOR ADEQUATE COMBUSTION AND VENTILATION AIR.
0” - 3” : 1-1/2” MAX. PROJ.
3“ - 12” : 1-1/2“ - 8” MAX. PROJ.
MIN. - 3” SHEATHING OR TRIM
TO OPENING SIDES - 8”
LISTED MASONRY FIREPLACE SYSTEM COMPLIES WITH APPLICABLE REQUIREMENTS OF UL127
Fireplace is designed for installation per the National Fire Protection Association Standard
for Chimneys, Fireplaces, Vents and Solid Fuel-Burning Appliances (NFPA 211).
! WARNING: THIS FIREPLACE HAS NOT BEEN TESTED WITHAN UNVENTED GAS LOG SET.
TO REDUCE THERISK OF FIRE OR INJURY, DONOT INSTALLAN UNVENTED GAS LOG SET INTO FIREPLACE.

2
M
MF FP PS ST-
-
-4
4
43 F
F
Fi
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D
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F
Fl
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Figure 1
13
14
8
7
Figure 2
21 21 9
13
914 10
10
8
7
12 12 22
22
6 624
20 24 20
23
23
1
1
19 19 3
3
3A
17 3A
16
18

3
ITEM
P/N
DESCRIPTION
QTY
1
MFPST-43-1
HEARTH (Left or Right)
2
3
MFPST-43-3
SIDE WALL
5
3A
MFPST-43-3A
SIDE WALL W/4” KNOCKOUT
1
6
MFPST-43-6
LINTEL
1
7
MFPST-43-7
DOME SIDE - LOWER
2
8
MFPST-43-8
DOME SIDE - UPPER
2
9
MFPST-43-9
DOME TOP FOR 16” CLASS A CHIMNEY
1
10
MFPST-43-10
DOME FRONT/REAR - UPPER
2
12
MFP521
RATING PLATE, MFP33
1
13
NOT SUPPLIED
Ø16” DAMPER /ANCHOR PLATE
---
14
NOT SUPPLIED
INSULATION BLANKET
---
16
MFPBST43 *
STEEL SUPPORT PLATFORM 8 INCH HIGH
1
17
NOT SUPPLIED
CEMENT BOARD, MFPST43
---
18
MFPSB *
ASSY, FLOOR JOIST BRACE
4
19
MF49-11
#3 REBAR (Ø3/8”) x 36”
8
20
MFP-ARC
LINTEL TRIM (OPTIONAL)
2
21
MFP116-16 *
COLLAR, TENSION STRAP 16”
1
22
MFP117 *
TENSION STRAP, UPPER
2
23
MFP118 *
TENSION STRAP, LOWER
2
24
MFP119 *
TENSION STRAP HARDWARE PACK
1
M
MF FP PS ST-
-
-4
4
43 F
F
Fi
i
ir
r
re
e
ep
p
pl
l
la
a
ac
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ce P
P
Pa
a
ar
r
rt
t
ts L
L
Li
i
is
s
st
Optional Outside Ø4”
Combustion Air Kit
Model No.: MFP4-AK
(Ø4” Ducting not included)
MFP43SHBL- Herringbone
MFP43FRBL- Running Bond
Refractory Firebrick Liners
(Herringbone Pattern shown, also available
in Running Bond - see Pg.27)
* ITEMS NOTED ARE SOLD SEPARATELY
ITEMS INDICATED AS “NOT SUPPLIED” CAN BE OBTAINED FROM YOUR
LOCAL HARDWARE STORE.
Only the following
doors have been tested
and approved for use
with this fireplace:
Crown-Breckinridge
or
McKenzie-Pendelton

4
MFPST-43 Fireplace Overall Dimensions
28"
Ø 16" CHIMNEY
A
Figure 3
Overall Dimensions
23 1/2"
RATING
PLATE
63 1/2"
24"
25 3/4“26 3/4" 38 3/4"
A 3"
43"
53"
SECTION A-A
Fireplace Framing Dimensions
Figure 4 Non-Combustible Floor Systems MAINTAIN THE 2” CLEARANCE TO
COMBUSTIBLES ABOVE THE DOME. DO
NOTATTACH COMBUSTIBLE MATERIALS
ON TOP OF THE DOME.
IF WOOD FRAMING IS UTILIZED
IT MUST BE HELD 18 INCHES
MIN. FROM TOP OF LINTELAND
2 INCHES MIN.CLEARANCE
MUST BE MAINTAINED ALL
AROUND FIREPLACE DOME.
IF METAL FRAMING IS USED
MAINTAIN A 1/2 INCH MIN. AIR
SPACE FROM TOP OF LINTEL.
2” MIN. CLEARANCE TO
COMBUSTIBLES AROUND SIDES,
REARAND TOP OF FIREPLACE DOME. 57” I.D.
FRAMING 28” O.D.
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.

5
30 5/8"
65"
F
Fi ir re ep pl la ac ce F
F
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ng D
D
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s
si
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on
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ns (
(
(C
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us
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F F
Fl
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)
)
Figure 5 - Combustible Floor
2" MIN**
CLASS “A”
CHIMNEY
8
1/2"
57" I.D.
FRAMIN
G
2"
MIN*
SEE FIG. 27
AND 28
* 2 INCH CLEARANCE TO COMBUSTIBLES BOTH
SIDES OF FIREPLACE
** If using a raised hearth or metal base plate, note that a
combustible wood header must be no closer than 2” to the top of
the dome top.
Figure 6 - Non-Combustible Hearth Extension (by others*)
2”
ONLY NON-COMBUSTIBLE
MATERIALWITHIN 18” OF
TOP OF OPENING.
SEE FIG. 26
2” AIRSPACE
CLEARANCE TO
COMBUSTIBLES
FROM REAR
AND SIDES
2" MIN
1/2”
1/2” THICK
CONCRETE
BOARD
20"
53
"
20”
28”
8” METAL
PLATFORM
12"
MINMIN 12"
MIN
* Not provided as part of fi replace
Figure 7 - Combustible Floor

6
Safety Information
WARNING: THIS FIREPLACE HAS NOT BEEN TESTED
FOR USE WITH AN UNVENTED GAS LOG SET. TO
REDUCE THE RISK OF FIRE OR INJURY, DO NOT
INSTALL AN UNVENTED GAS LOG SET INTO FIRE-
PLACE.
WARNING: THIS FIREPLACE HAS BEEN TESTED FOR
USE WITH OPTIONAL GLASS DOORS: CROWN-
BRECKINRIDGE OR MCKENZIE-PENDELTON ONLY.
WARNING:
Install only approved, listed UL 103-16” I.D. Class A
Chimney System.
Chimney maximum height: 40 feet
Chimney minimum height: 14 feet (with offset = 17 feet)
2 offsets maximum.
Important: Follow the chimney pipe manufacturer’s
instructions on the installation of their specific fl ue system.
GUIDELINES FOR USE:
All current and future users of Mason-Lite Fireplaces
are charged with the responsibility for full knowledge of the
information contained within this manual which includes:
Strict requirements for assembly.
Detailed instructions for installation.
Cautionary guidelines for use.
On-going maintenance instructions.
It is the responsibility of the distributor, subcontractor and/or
the general contractor –whoever shoulders the liability for
installation of this product –to see to it that the work is in
complete compliance with the guidelines and instructions
in this manual. Note that the general contractor is the party
accountable for seeing that adequate clearances are provided
from all fi rebox surfaces per specifications in this manual.
DO NOT USE A FIREPLACE INSERT OR OTHER
PRODUCTS NOT SPECIFIED FOR USE WITH THIS
FIREPLACE.
The Mason-Lite is Designed for Use Only with:
- Solid Wood Logs
- Plumbed LPG or Natural Gas Log Lighter.
- Plumbed ANSI Z21.60 Decorative Gas Log.
DO NOT USE OR STORE GASOLINE OR OTHER
FLAMMABLE LIQUIDS OR GASES IN OR NEAR THE
FIREPLACE!
ATTENTION: A
fi re or an explosion could occur causing
property damage, injury or loss of life if you do not follow the
information in this manual!
NOTE: THIS MANUAL MUST BE REPRODUCED ONLY
IN ITS ENTIRETY.
Before Beginning the Installation
Read these instructions carefully before beginning the
installation of this fi replace. Also, if installing an ANSI Z21.60
DecorativeGasLog,readthegaslogappliancemanufacturer’s
literature regarding sizing and suitability for the installation into
this Enclosure prior to installation.
Statement of Intended Use:
The Mason-Lite Masonry Fireplace is a modular refractory
masonry unit designed for fi eld assembly. The fi rebox 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
completemasonry fi replace. Inadditionto the basic enclosure,
a standard 1-1/8” thick, high temperature refractory brick is
required to line the interior of the fi rebox.
These
fi replaces are not intended to serve as a primary
heat source, rather, the fi replace was expressly created as a
supplemental source of heat. The unit is designed for use with
solid fuels such as cord wood.
WARNING:
Any application other than the “Intended Use” as stated above
is in violation of the manufacturer’s instructions and is hereby
prohibited. Such violation may cause immediate hazard,
property damage or loss of life and will void all liabilities to the
manufacturer and will void all warranties explicit or implied.

7
Internal
Wall
Installation
Introduction Product Overview
Figure 8 - Typical Installations
We extend a warm welcome from all of us at Masonry
Fireplace Industries, LLC. (MFI),proud manufacturers of
Mason-Lite Fireplaces. Thank you for choosing MFI.
You may have thought long and hard before you chose the
fi replace which would grace your home. Rest assured that
every component of the Fireplace has been tested to ensure
long-term durability.
Product Overview
Mason-Lite Fireplaces are designed as factory-built blocks
to be assembled on-site. These fi replaces may be installed on
either combustible or non-combustible fl oors. In order for the
fi replace to be installed on a combustible fl oor though, it is
necessary that the fi replace be supported on a platform or
sub-floor that is non-combustible.
The Four Components of the Mason-Lite Fireplace:
•Combustible or Non-Combustible Floor
•Non-Combustible Raised Platform
•MASON-LITE Firebox and Smoke Dome
•UL103-16” class A listed chimney system required.
Important: Follow the chimney pipe manufacturer’s
instructions on the installation of their specific fl ue system.
Careful step-by-step instructions for each phase of the
installation procedure will be given for the Mason-Lite
conventional radiant heat fi replaces. Those instructions
generally fall into the following categories:
•Spacing and clearance as it relates to combustible
materials.
•Familiarity of installation for all components.
• The strength of the fl oor on which it rests.
•Chimney system measurements.
• Choice of materials and craftsmanship in fi replace and
hearth fi nishing.
•
Island
Installation
Note that each of these topics will be covered in detail and that
the installer is expected to understand each phase completely
before going on to subsequent instructions.
Attention: Be advised that all the illustrations in this manual
are for general reference only. Do not scale drawings. Actual
design elements will vary from case to case. Pay attention to
specified minimum clearances to combustibles.
Testing and listing for the Mason-Lite Fireplace has been un-
dertaken by PFS Inc. (Report No. 08-154) to UL 127.
Attention: You may need a residential building permit to in-
stall a Mason-Lite Fireplace. Consult local jurisdictions before
you get started!
If asked, advise the local authorities that the Mason-Lite
Fireplace is designed for installation per the National Fire Pro-
tection Association Standard for Chimneys, Fireplaces, Vents
and Solid Fuel-Burning Appliances (NFPA211).
When choosing the location of your Mason-Lite Fireplace,
keep in mind you must maintain 2” (two inches) minimum
clearance from left, right and rear of Fireplace to surrounding
structure. Also, when choosing a location, consider outside air
requirements to determine if it will be on the left or right side
of the Fireplace. In the case of an island installation, outside
air accessibility may be obtained through sub-flooring. See
section on Installing Outside Air on page 17.

8
Clearances to Combustibles
The distance to be maintained from the surfaces of the
fi replace to combustibles must be observed. Below is a list of
the most common combustible materials to name a few:
Drywall Wood fl ooring Plywood
Sub-flooring Wood Framing Particle board
Mill board Plywood paneling
Maintain the following clearances:
•Unit front, sides, rear: 2” (50 mm)
•Combustible Floor: 8” (150 mm)
•Combustible Sheathing above opening top: 8” (200 mm)
•Sheathing or trim to opening sides: 8” (200 mm)
•Mantel above opening: (refer to Fig.9)
•Opening to sidewall: 24” (500 mm)
•Hearth extension beyond front: 20” (500 mm)
•Hearth extension beyond sides: 12” (300 mm)
• Insulation from fi rebox: 2” (50 mm)
Figure 9
Understanding Clearance to Combustibles
There is a build-up of 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
MFPST-43 Mason-Lite Fireplaces have been designed
with clearance to combustible fl oors at a minimum of 8-1/2”
(eight and one half inches) as provided by the 8” metal base
and 1/2” concrete board. Cover any part of the combustible
fl oor system left exposed with 1” (one inch) thick ceramic fi ber
insulation rated up to 2,100°F.
The Mason-Lite Steel Platform , the 1/2” concrete board
above, the 1” ceramic fi ber blanket or board within the
platform (Fig.15) and the 2” clearance for dome front, and unit
sides provide the temperature safety margin to combustible
materials.
Mason-Lite Fireplace & Chimney System
Prior to starting the installation, check with local, regional or
state codes for any restrictions or required permits regarding
your fi replace installation.
1) The Mason-Lite is designed to be installed with a listed
UL-103-16” I.D. Class A, Metal Chimney System.
2) This Mason-Lite
fi replace 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 fi replace. 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 a manufacturer’s
control regarding improper fi replace 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 right heights; system drafts
caused by faulty mechanical systems; adverse weather
conditions or any other inclement environmental situations
over which the manufacturer has no control.
5) Inspect all
fi replace & chimney components for evidence
of damage prior to starting installation. Consult your local
distributor for replacement parts if necessary.
6) Undernocircumstancesshouldyoumakeanyadjustments
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 fi replace. You must follow your
chimney manufacturer’s 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 fi rebox must remain open. DO NOT fi ll
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 fi replace to the top/termination chimney
is 40 feet. The minimum installed height of the completed
Chimney System is 14 feet with a straight fl ue stack, 17 feet if
the chimney includes one or two offset sections.