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125203-01C
8
There are two vent kits available which have
been specially designed for common installa
-
tions in manufactured (mobile) homes: MW8K
(8' vent kit) and MW9K (9' vent kit). Contents
of these kits are listed under
Accessories
on
page 18.
IMPORTANT
: If height of chimney
assembly exceeds requirements for transpor
-
tation of home, chimney installation may be
completed after home is sited.
Note: Termination must always be installed
after the home is sited.
ASSEMBLY AND INSTALLATION OF
DOUBLE WALL CHIMNEY SYSTEM
Each double wall chimney section consists of
a galvanized outer pipe, a stainless steel inner
flue pipe and a wire spacer. Pipe sections must
be assembled independently as chimney is
installed. When connecting chimney directly
to fireplace, inner flue pipe section must be
installed first with lanced side up. Outer pipe
section can then be installed over flue pipe
section with hemmed end up. Press down
on each pipe section until lances securely
engage hem on fireplace starter. Wire will as
-
sure proper spacing between inner and outer
pipe sections.
WARNING: The opening in the
collar around the chimney at the
top of the fireplace must not be
obstructed. Never use blown insula-
tion to fill the chimney enclosure.
Continue to assemble chimney sections as
outlined above, making sure that both inner
and outer pipe sections are locked together.
When installing double wall snap-lock chimney
together, it is important to assure joint between
chimney sections is locked. Check by pulling
chimney upward after locking. Chimney will not
come apart if properly locked. It is not neces
-
sary to add screws to keep chimney together
(exception, see Figure 16, page 11).
ADJUSTABLE FIRESTOP THIMBLE
(FST-A)
Adjustable Firestop Thimble Assembly (FST-A)
is used to provide necessary air space and
clearance between chimney pipe and insula
-
tion in attic space of a manufactured home.
To install thimble assembly, determine dis
-
tance between ceiling joist and roof framing.
Attach adjustable thimble to firestop spacer
so that assembly will cover distance. Adjust
-
able thimble should be even with or above
roofline. Sheet metal screws or staples may
be used to attach thimble to firestop spacer.
An opening large enough to allow insertion
of firestop thimble assembly will be required
in ceiling. Attach firestop/thimble assembly to
ceiling/ceiling joist using screws or staples as
shown in Figure 11. A minimum of 8 screws
or staples should be used.
Firestop thimble assembly should also be
used where there is a cathedral ceiling, in
-
sulation barrier and roof, all in one assembly
in a manufactured home (see Figure 11).
The FST-A thimble can be used in any one
of three common ceiling pitches; flat, 12"/96"
and 30"/144".
An opening big enough to allow insertion of
firestop thimble assembly will be required.
This opening depends on the pitch of your
ceiling. If your ceiling is a flat or 12"/96" pitch,
you must use adapter plate provided to seal
unwanted openings. For 30"/144" pitch, dis
-
card adaptor.
Thimble Extension
(If Needed)
Roof Line
Adjustable Thimble
Existing
Ceiling Frame
Firestop Spacer
Screws or Staples
(Min. of 8)
Figure 11 - Attaching Firestop/Thimble
Assembly to Ceiling
VENTING INSTALLATION
Continued
f i r e - p a r t s . c o m
