Superior MHW36R Installation And Operation Instructions Manual page 8

VENTING INSTALLATION
Continued
There are three vent kits available which have been specially designed
for common installations in manufactured (mobile) homes: MW8K (8'
vent kit), MW9K (9' vent kit) and MW8K-HT (8' HT vent kit). Contents of
these kits are listed under Accessories on page 20. IMPORTANT: If height
of chimney assembly exceeds requirements for transportation 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 as-
sembled 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. The wire spacer will assure 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 insulation 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 install-
ing double wall snap-lock chimney together, it is important to assure that
the joint between chimney sections is locked. Check by pulling chimney
upward after locking. Chimney will not come apart if properly locked. It
is not necessary to add screws to keep chimney together (exception, see
Figure 16, page 11).
ADJUSTABLE FIRESTOP THIMBLE
This adjustable thimble adjusts to the most commonly used ceiling
pitches automatically. Refer to the following procedure for installing the
adjustable thimble:
The adjustable thimble may be installed around the chimney components
at assembly or the chimney components may be inserted though the
installed thimble.
Install the thimble from below a finished roof and ceiling assembly. Push
the thimble assembly (tube section first) up into an already prepared open-
ing and secure open end of the thimble base to the finished underside of
the roof and ceiling assembly (Figure 11).
Note: The two screws on which the thimble base pivots may be removed
and reinstalled into any of the series of placement holes provided for the
adjustment of the adjustable thimble's point of rotation (Figure 11A).
Adjust the pivot screens to locate the open end of the tube section as
required for the roof line. Additional screws may be placed at the high
and low points of the thimble base in the tabs provided.
Place the thimble base against the finished roof and ceiling assembly and
secure it to the framing with screws or nails. The thimble is self-adjusting
around inserted chimney components. Thimble extensions are available
and may be installed into the adjustable thimble's tube section as needed
to extend the thimble through the roof-line. Secure the thimble extension
to the tube section with screws no more than 1/2" in length.
8
Flange
End of
Tube
Figure 11 - Attaching Adjustable Thimble
Figure 11A - Attaching Adjustable Thimble
Position appropriate thimble/firestop spacer combination at ceiling and
nail temporarily with two (2) 8d nails or equivalent fasteners (see Figures
12A, 12B and 12C). Use one fastener on opposite sides to hold thimble/
firestop spacercombination in position. Nail permanently, using at least
two (2) more fasteners, after chimney sections have been assembled
through the thimble/firestop spacer combination and after any neces-
sary 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 12).
Note: The installation of the thimble extension is not required in manu-
factured homes having ventilated attic spaces, when the chimney height
is equal to or greater than 12 feet.
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 are available from your dealer for
constructions 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 manufactured homes (see Figures 12B and 12C, page 9).
SuperiorFireplaces.US.com
Open End
of Tube
Thimble
Base
Placement
Holes
Pivot
Screw
127312-01D