NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
1
INSTALLING THE CHIMNEY SYSTEM
Step 1.
Before continuing, check the operation
of the damper, as described on
Page 4
, (
refer
to
Figure 2
)
of the
Installation Instruction and
Care and Operations (IICO)
manual.
Step 3.
Position appropriate thimble/firestop
spacer combination at ceiling and nail temporar-
ily with two (2) 8d nails or equivalent fasteners
(
see
Figures 3, 4 and 5
).
Use one fastener on
opposite sides to hold thimble/firestop spacer
combination in position.
In new construction, to determine chimney center
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 1
)
. Then plumb from ceiling or
roof level directly above hole which has just
been completed.
CAUTION
Allow minimum 1" chimney
air space to framing members
throughout chimney installation.
A minimum 1" air space must be
maintained from all insulation
and building materials extend-
ing for any continuous length
surrounding the chimney.
Reference
Figures 10 and 11
in the
IICO
and
their charts for framing dimensions at Ceilings
and Roofs.
Figure 4
Nail permanently, using at least two (2) more
fasteners, after chimney sections have been
assembled through the thimble/firestop spacer
combination and after any necessary adjust-
ments 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 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.
Figure 3
Figure 1
Note: Trim Thimble/
Extension To Desired Length
And Pitch At The Rood Line
14" Min.
Pitched Roof
Pitched Roof
Bow Roof
14" Min.
Outer Pipe Of
Chimney
Outer Pipe Of
Chimney
Outer Pipe Of
Chimney
14" Min.
Thimble
FM8-AT1
13"
Thimble
FM8-AT1
Thimble
FM8-AT1
Thimble
Extension
F8-TE26
Firestop Thimble
Attic Above
1”
Clearance
Minimum
Firestop Spacer
F8FS-2
Room Above
Figure 2
Addendum to Installation Instructions
Additional Instructions for Alternative Chimney
Installation for Superior™ Round Back Fireplaces with
Bi-Fold Doors and Combustion Air Kit
P/N 900284-00 Rev. NC 10/2014
For use with Models
MHW36R
MHW36CB
P900284-00
