Preway BI28B, BI36B, BI42B Installation, Service Instructions & Parts

INSTALLATION, SERVICE INSTRUCTIONS

AND PARTS LIST

FOR

BUILT-IN FIREPLACE

WITH

Prefabricated Chimney

MODELS

MODEL NO.

SIZE

Bl28B

TYPE E

TYPE E

28”-Zero Clearance
36” - Zero Clearance
42” - Zero Clearance

DO NOT INSTALL IN MOBILE HOME

THIS MANUAL WILL HELP YOU TO OBTAIN EFFICIENT, DEPENDABLE SERVICE

FROM THE FIREPLACE AND CHIMNEY. AND ENABLE YOU TO ORDER REPAIR
PARTS CORRECTLY. KEEP IN A SAFE’PLACE FOR FUTURE REFERENCE.

WHEN WRITING, ALWAYS GIVE THE FULL MODEL NUMBER WHICH IS ON THE

FRONT OF THE RIGHT PORCELAIN FIREBOX SHIELD.

DO NOT MODIFY OR ALTER THE CONSTRUCTION OF THIS FIREPLACE OR
COMPONENTS. ANY MODIFICATION OR ALTERATION OF CONSTRUCTION
VOIDS THE WARRANTY AND APPROVALS OF THIS UNIT.

Manufactured by

PREWAY INC.

General Offices and Factory

WISCONSIN RAPIDS, WISCONSIN 54494

general

Remove

811

parts and check to be

sure

they are

there. Report to your dealer if any parts

are

missing

or

damaged.

One Carton Containing

Fireplace and Spark Strips.

ALSO

Any other cartons you have ordered to complete

your chimney installation.

NOTE: Ta identify pieces, refer to Parts Illustration.

Local Codes

Local

building codes should be consulted in all cases
as to the particular requirements concerned with the
installation of factory built fireplaces,

DO NOT INSTALL IN MOBILE HOME

IMPORTANT

The fireplace may be installed either with the
area above the fireplace open within the en­closed framing (chase framing) or inset from the
sides of the fireplace. When insetting is desired

the chimney spacer MUST be installed (See Fig. 6).

For your safety and protection, fireplace and
chimney should be grounded. Use Ground Rod,

clamp and wire to ground chimney and fireplace.

MUST

TERMINA

36” MINIMUM
ABOVE ROOF

FIREPLACE

OPENIN<

FLOOR

‘-‘-PLACE ‘METAL

HEARTH EXTENSION

STRIPS UNDER

DIMENSIONS

FIREPLACE AND

HEARTH EXTENSION

NOTE:

“J”

Clearance may be 12” Minimum

with

Preway

Insulated Wall Shield or Equivalent.

bottom, sides, and back of the unit. Chimney sections

above the

i&t

area require a minimum clearance of

one inch to combustible materials. Chimney

sections

from the top of the fireplace to the first joist are re-

quired a minimum

cie~rance

of 3 inches.

Firestop

spacers must be installed at every ceiling level

which

will automaticIly provide

the

necessary

clearance to

the joist.

Any fireplace must not be installed closer than

specified in Chart 2 (Page 3) to any unprotected

corn-

bustible

wall, perpendicular to the fireplace openings

(See Fio. 1)

unless a

Prewav

wall shield, Model WS40

or

CLEARANCES:

S,des ~

0”
Back ~~ 0”
Base ~

0”

TO TOP OF

FIREPLACE,

WIRING ACCESS

PLATE AND

78”

See

Chart

1

ELECTRIC INLET

CHART 1

Dimensions

28”,

36”. 42” Fireplace

Bl28B

81368

81426

A 22”

30”

36”

To Top of Fireplace

I

38’8”

I

40’%”

18”

20”

I

Opcnsng

I

I

J

36”

36”

36-

Clearances

!

When installed in accordance with these instructions,

the basic unit may touch combustible materials at the

NOTE: This fireplace is NOT intended as a furnace to
heat an entire home. Use for supplementary heating

only.

2

location

INSTALLATlON

The overall height from bottom of fireplace

to

chimney flue outlet is to he

not

less than 16 for

Models

81288, 81366

or 12’6” for the

81428

with the

standard chimney termination.

(ERTSA

or IORTSA). If

Decorative Chimney

(DCT)

is used overall height may

be reduced on

81288

and

81368 lo

12’6”.

81288

and

81368

overall height may be reduced to 11’ by using

a

BFSL

Thimble in place of a fIrestop spacer at first

ioist area. Installation may be 90 feet in height but

must be supported at every 35 foot level.

Fireplace lwdlion will he influenced by such factors

as traffic in rooms, doors

and

windows and

construe-

tion

above and below the

firepldce.

~irepl~e may be installed in any location which will

provide the necessary clearances. A location that r”-

yuires

cutting the least number of ioists or rafters

WIII

simplify and reduce installation cost. The fireplace

may be installed

directly

on the floor or elevated on

a

wooden or masonry l,Iatform if desired. However. the

floor or platform must be solid and continuous to
prevent any air from entering the room from under
the fireplace. See Page 5 for chase construction.

The fireplace may be positioned and then the fram­ing built around it or the framing may be constructed
and the fireplace pushed into the opening. (See

Fig. 10.) The dimensions shown on Pages 2 and 3

may

be used to

construci

the fireplace opening.

CORNER INSTALLATION

This can be the most economical in

rooms

where

wall space is at a premium. Because of the slanted

sides, the fireplace seems to take less area of floor
space than being

proiected

into the

room

from a flat

wall. (See Fig.

5.)

Cross Section

TRIPLE WALL

INSULATION

DAMPER

~~L”L

~T~;l;l”

HANDLE

\

FRAME ‘BOTTOM

INSULATION

ASSEMBLY

PROJECTION

PROJECTION

.

CLEARANCE TO CORNER MUST BE 36”.

”

IF

WS40 WALL SHIELD IS INSTALLED

*

CAN BE REDUCED TO 12”

Framing Dimensions

CHART 2

Dimensions

28”.

36” 42” Fireplace

Measurement

1

B12BB

1

81368

1

81428

I

A

1

14%” SQ.114%” SQ.

1

16%” SQ.

B

I

7%”

I

7w

I 8%”

H

2%”

2%”

13/4”

J

38”

46”

52”

Y

1 0” 71”

7K*

t

I.

1

,

I

__

I

-_

L

/

49%” 1 55%” 1 59%”

With 8FSL

Firestop

Spacer

at First Joist Area

A

17%” SQ.

17%” SQ.

6

8A”

87@”

H

1

‘/s”

1

vi’

HEARTH

EXTENSION

42”~

16”

52”~

1

6”

66”XzO”

NOTE: Los Angeles code requires Hearth to be

12”

each side of Fireplace

openirng

and 20” deep.

3

installation

spacers

(Part No. T18691)

must

be attached

be-

Installation

decide location,

type

of installation, etc. and lay­““, on floor.
Frame

cavi!),

(closet) or opening for fireplace.
Prepare floor by installing hearth extension and
platform, if desired. Place metal strips (provided)
under fireplace and extending out to where it

will be under hearth also. (See Fig.

I.)

This will

prevent any sparks from reaching the floor.
Place

iNreplace

in position. Attach elbow or

rIr,agt~~t scct~on

of triple wall pipe in place on top

oi

f’rep’arc

Atta:h

with 3 screws provided.

Wnen triple ‘wa

I

pipe

ruses

through

ioist area.

use

i~restnp

s~nacer.

NOTE: If

IO”

diameter triple

wall pope ,s

used,

ioist

will have to be

cuI

and

boxed. (See

Fit. 11.1

Frame around fireplace sides and up to ceiling
add sections of pipe as you frame.
If triple wall

p,pe

sect,“,, goes through framed

opening in ceiling,

instali fIrestop

spacer by slid­ing up over triple wall pipe section and nailing

to

bottom side of joists.

If an offset is needed to miss a

joist or

beam, use

two elbows and pipe as needed. See instructions

below.

To Install Elbows

Maintain I inch minimum clearance to combustibles

for sections located above the

joist

area where the
fireplace is located. Maintain 3 inch clearance to
combustibles for sections located directly above the

fireplace (See Figure

6).

1.

Place elbow (without straps) on vertical

triple

wall

pope.

(or an fireplace), pointed in the directfon

r:,fF,ct 1s

rci,.,,rrd Turn shghlly

until s<rcw holes

tiligrl drid ;~llci~h \Nlttl

tt,rce

~crcws provided~

2. To .ichievc

minimum

offset,

(ice chart on b;lrk

page) cilt,ict, return

elbow

(.*iti~ lij” srrfii)ij II) f~rsl

elbow

wit/?

screws provided. To

a&eve

further

offset, you may install various

iengths

of triple

wall pipe between the elbows to a maximum

length of 15 feet. (This

must

be supported with

straps every 6 feet.) (See Back Page.)

IMPORTANT: If gas line or outside combustion

air is to be built in to fireplace - install it before

framing in fireplace.

Frame ,w”rk around the fireplace (either in flush or

project% installatfons)

can be planned to incorporate,

book shelves. wood bins, closets, etc.

F,replace

framing w,ll

be governed by the face

~mater,als

used,

<and

how far above and-to each side

they

WIII

extend.

When the fireplace is installed on a combustible

floor, a non-combustible hearth extension

mus+

be
used +” prorect the floor in front of the opening. (See
Chart on Page 2 for proper dimensions.)

The fireplace may be placed on a platform in order

to

apply the face material completely around the open­ing. CAUTION - Do not block off air opening at
bottom of fireplace.

The Hearth Extension must extend at least 16” in
front of and at least 8” beyond each side of the fire­place opening for the 8128 and 6136 and 20” in front,

12” on

each side of the fireplace opening for the 8142.

Use Preway Hearth Extension

Yl3917

for 28”.

Y13259

for 36” and

Yl3560

for the 42” fireplace. The Hearth

Extension may be covered with non-combustible ma­terials which do not ignite and burn. These are steel,
iron, brick, tile, concrete, slate, asbestos, glass or
plaster or any combination

Chimney

Enclorures

‘IRESTOP-

I

I

ENCLOSURES

FLOOR AND

‘LOORS

ABOVE

FIRST JOIST

CHASE FRAMING

INSET FRAMING

1

NOTE:

Use only four elbows per installation and
never over 30” maximum. Elbow may
be used directly on fireplace.

4

installation

Chimney Chases

STUD

(JOISTS)

INSULATE

” ?.

. __^^

FbF

CHASE COLLAR

SPACER

CHASE COLLAR

STORM COLLAR

CHASE METAL

1 b,

-INSULATE

STUb.5

SOLID

CONTINUOUS

REFER TO PAGE 3 FOR MINIMUM
OVERALL HEIGHT OF FIREPLACE
TO FLUE OUTLET.

8128

AND

6136

MAY USE BCC CHASE CAP WITH

8CCSA

SPARK ARRESTOR.

5