Marco A41MTU Installation Manual download pdf (Page 13)

INSTALLING

YOUR

DOUBLE-WALL

CHIMNEY

SYSTEM

BEFORE

YOU

BEGIN INSTALLING

YOUR

DOUBLE

FIRESTOP

SPACERS

WALL

CHIMNEY

SYSTEM

DETERMINE

HOW

MUCH

PtPE

AND

ACCESSORIES

YOU

WILL

NEED.

SEE

firestop spacers are required

at

each point

where

the

PAGE

6

FOR

EXAMPLES

Of

CHIMNEY AND

TERMI-

chimney penetrates

a

floor

or

ceiling

joist

space.

Their

NATION

DESIGNS.

purpose

is

twofold:

they

eslablish

and

maintain

the

required

clearance betwekn

the

chimney

and combus-

tible

materials,

and

they provide complete separation

from

one

floor

space

to

another

floor or attic space,

as

Each

double-wall chimney section

consists

of

an

outer

required

by

most

codes.

When

penetrating

a

floor

or

pipe, flue pipe and single-piece

wire

spacer. The pipe

ceiling

at

an angle, either the

15'

or

30'

firestop

must

be

sections

are

not

unitized

and

must

be

assembled

inde-

used.

(See

Figure

22).

pendently

as

the

chimney

is

installed. (Figure

21).

FIGURE

21

INNER

PIPE

+zsZ(

RESTOP

SPACER

If pipe passes

through

a

framed opening

between

floors,

install

a

firestop spacer

to

the

bottom

of

the

joists

(Figure

22).

When pipe passes

into

the

attic

space,

install the firestop

spacer

on the

top

of

the

joists (Figure

23)

and

secure with sheet

metal

screws

or

nails.

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