Installing The Chimney System - Intertherm BM36HC Installation Instructions Manual

Step 4. Fireplace should be secured to side
framing members using the full length nailing
tabs at the top and bottom of the fireplace front
face. Use screws, 8d nails or equivalent fasten-
ers ( Figure 16 ). This manufactured home model
is also provided with floor brackets used to
secure the fireplace to the floor to prevent shift-
ing in transit.
Figure 16
Note: The nailing tabs and the area directly
behind the nailing tabs are exempt from the
clearances described on page 5. Maintain at
least 1/2" clearance from the firebox wrapper to
the framing at the closest point of contact,
directly adjacent to the flange.

INSTALLING THE CHIMNEY SYSTEM

Step 1. Before continuing, check the operation
of the damper, as described on page 4, ( refer to
Figure 2 ).
Step 2. Using standard construction framing
techniques, construct opening for chimney route
up through the ceiling(s) and roof or through an
outside chase.
Framing must maintain adequate minimum air
space clearance at all times.
CAUTION: ALLOW MINIMUM 1" CHIMNEY
AIR SPACE TO FRAMING MEMBERS THROUGH-
OUT CHIMNEY INSTALLATION. A MINIMUM 1"
AIR SPACE MUST BE MAINTAINED FROM ALL
INSULATION AND BUILDING MATERIALS EX-
TENDING FOR ANY CONTINUOUS LENGTH SUR-
ROUNDING THE CHIMNEY.
Reference Figures 14 and 15 and their charts
for framing dimensions at Ceilings and Roofs.
8
In new construction, to determine chimney cen-
ter line, use plumb line from roof or ceiling above
fireplace to center of flue collar on fireplace.
For remodeling, plumb to center of flue collar
from ceiling above, drive nail through ceiling
from below to mark position, then mark and cut
to passage from above ceiling (around nail)
( Figure 17 ). Then plumb from ceiling or roof
level directly above hole which has just been
completed.
Screw, 8d
Nail Or
Equivalent
Fastener
Figure 17
Step 3. Position appropriate thimble/firestop
spacer combination at ceiling and nail tempo-
rarily with two (2) 8d nails or equivalent fasten-
ers ( see Figures 19,20 and 21 ). Use one fastener
on opposite sides to hold thimble/firestop spacer
combination in position. Nail permanently, us-
ing at least two (2) more fasteners, after chimney
sections have been assembled through the
thimble/firestop spacer combination and after
any necessary adjustments have been made.
Firestop spacer must be secured by at least four
(4) fasteners when completely installed.
Note: If there is a room above ceiling level,
firestop spacer must be installed on the bottom
side of the ceiling. If an attic is above ceiling level,
firestop thimble must be installed on the bottom
side of ceiling joist (Figure 18 ).
Figure 18
NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE.
Room Above
Firestop Spacer
Attic Above
Firestop Thimble
Figure 19
Ensure the thimble penetrates the roof opening.
The thimble must extend completely through
the ceiling or roof cavity to the outermost plane
of the roof. Note: Thimble extensions (F8-
TE26) are available from your dealer for con-
structions in which the distance between the
outside of the roof and the inside of the ceiling
exceeds 13". The thimbles and their extensions
provide for zero clearances to combustibles
and must be used at the ceiling/roof in manu-
factured homes ( Figures 20 and 21 ).
Outer Pipe Of
Chimney
14" Min.
Thimble
FM8-AT1
Pitched Roof
Note: Trim Thimble/
Extension To Desired Length
And Pitch At The Rood Line
14" Min.
Thimble
Extension
F8-TE26
Thimble
FM8-AT1
Pitched Roof
Outer Pipe Of
14" Min.
Chimney
Thimble
FM8-AT1
Bow Roof
Figure 20
WARNING: DO NOT ALLOW INSULATING
MATERIALS TO BE BLOWN INTO THE
SPACE INSIDE THE THIMBLE AND THE
CHIMNEY. TO DO SO COULD RESULT IN
A FIRE HAZARD.
1"
Clearance
Minimum
Outer Pipe Of
Chimney
13"