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Figure 14 - Installing an AS8
STEP 8 - Double-checking Chimney Assembly.
Continue assembling the chimney sections up through
the firestop spacers as needed. While doing so, be
aware of the height and unsupported chimney length
limitations that are given on page 11 under "Chimney
Requirements".
Check each section by pulling up slightly from the top to
ensure proper engagement before installing the suc-
ceeding sections. If they have been connected correct-
ly, they will not disengage when tested.
STEP 9 - Securing Chimney System.
When offsets and returns are joined to straight pipe sec-
tions, they must be locked into position with the screws
provided, using the predrilled holes. To prevent gravity
from pulling the chimney sections apart, the returns and
the chimney stabilizers have straps for securing these
parts to joists or rafters. See Figure 15.
NOTE: Be sure to provide support for the pipe
d u r i n g construction and check to be sure inad-
vertent loading has not dislodged the chimney
section from the fireplace or at any chimney joint.
Offset/Return with Stabilizer
3-00
Figure 15
RHW-44 WOODBURNING FIREPLACE
WHEN CHIMNEY SECTIONS EXCEEDING
SIX FEET IN LENGTH ARE INSTALLED
BETWEEN AN OFFSET/ RETURN, STRUC-
TURAL SUPPORT MUST BE PROVIDED
TO REDUCE OFF-CENTER LOADING AND
PREVENT CHIMNEY SECTIONS FROM
SEPARATING AT THE CHIMNEY JOINTS.
STEP 10 - Marking the Exit Point of the Roof.
Locate the point where the chimney will exit the roof by
plumbing down to the center of the chimney. Drive a nail
up through the roof to mark the center. See Figure 16.
Figure 16 - Ceiling and Attic Construction
STEP 11 - Cutting out the Hole in the Roof.
Measure to either side of the nail and mark the 14-1/2" x
14-1/2" opening required. This is measured on the horizon-
tal; actual length may be larger depending on the pitch of
the roof. Cut out and frame the opening. See chapter 25 of
the Uniform Building Code for Roof Framing details. Be
sure to maintain a 2" minimum air space between the chim-
ney section and the roof.
STEP 12 - Assembling Chimney Sections.
Continue to add chimney sections through the roof opening,
maintaining at least a 2" air space.
STEP 13 - Installing the Roof Flashing (optional).
If a roof flashing is to be used, install the roof flashing
appropriate to the roof pitch and install a TR344 terminal
cap following the instructions shipped with the accessory.
16
WARNING!
33147A
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