Hearth and Home Technologies A42CH EN - Manual (Page 19)

Heatilator • A36C & A42C • 28396 Rev Y • 10/06 19
C. Assemble the Chimney Sections
Attach either a straight chimney section or an offset to the
top of the fi replace (depending on your installation require-
ment). Chimney sections are locked together by pushing
downward until the top section meets the stop bead on the
lower section.
The inner fl ue is placed to the inside of the fl ue section below
it. The outer casing is placed outside the outer casing of the
chimney section below it. See Figure 5.4.
D. Install the Ceiling Firestops
• Mark and cut an opening in the ceiling for the ceiling
fi restop being used. See Figure 5.5.
• Frame the opening with the same size lumber used in the
ceiling joists.
• Install the ceiling fi restop.
Note: The ceiling fi restop MUST be nailed to the bottom
of the ceiling joists EXCEPT when the space above is
uninsulated and the attic insulation shield is not being used
(see Figure 5.5). When the attic insulation shield is used
the ceiling fi restop may be above or below the joist of an
insulated ceiling.
Note: You must provide support for the pipe during con-
struction and check to be sure inadvertent loading has not
dislodged the chimney section from the fi replace or at any
chimney joint.
Note: Inner fl ue and outer liner sections cannot be disas-
sembled once locked together. Plan ahead to ensure the
proper installation height is achieved with the selected
chimney components.
• Ceiling fi restops must be used at ceiling/fl oor.
• Chase construction requires ceiling fi restops at each
fl oor or every 10 ft (3.05 m) of clear space.
• Use same dimensional lumber as joists.
Ceiling fi restop slows spread of fi re and reduces cold air
infi ltration.
CAUTION
Figure 5.4 Assembling Chimney Sections
ROOM ABOVE (non-insulated ceiling)
ATTIC ABOVE (insulated ceiling)
B
A
Ceilng firestop from
bottom
Ceiling firestop from
top
When attic insulation
shield not used
Note: Use same dimensional lumber for framing
ceiling firestop and joists.
Figure 5.5 Installing the Ceiling Firestop
Fire Risk
Do NOT install substitute or damaged
chimney components.
• MUST use chimney system described in
this manual.
• NO OTHER chimney components may
be used.
Substitute or damaged chimney components
may impair safe operation.
WARNING Catalog #
A B
in. mm in. mm
FS338 14-1/2 368 14-1/2 368
FS339 14-1/2 368 18-3/8 467
FS340 14-1/2 368 23 584