16
CAST IRON STOVE AND BURNER SYSTEM
107599
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VENTING
INSTALLATION
Continued
Cathedral Ceiling Installation
1.
Remove shingles or other roof cover-
ing as necessary to cut the rectangular
hole for the support box. Mark the out-
line of the cathedral ceiling support box
on the roof sheathing using the locat-
ing hole as a center point.
2.
Cut the hole 1/8" larger than the sup-
port box outline (see Figure 36).
3.
Lower the support box through the hole
in the roof until the bottom of the box
extends at least 2" below the ceiling
(see Figure 36). Align the support box
vertically and horizontally using a
level. Temporarily tack the support box
in place through the inside walls and
into the roof sheathing.
4.
Using tin snips, cut the support box from
the top corners down to the roofline and
fold the resulting flaps over the roof
sheathing (see Figure 37). Apply a bead
of non-hardening mastic around the top
edges of the support box to make a seal
between the box and the roof. Nail in
place with roofing nails. Remove any
combustible material that might be in-
side of the support box.
5.
Complete the cathedral ceiling installa-
tion by following the same procedures
outlined in steps 2 through 7 for Flat
Ceiling Installation, page 15
.
Figure 36 - Cathedral Ceiling Support
Box Installation
Non-hardening Mastic under all
edges of support box before nailing
Figure 37 - Installed Cathedral Ceiling
Support Box
Cut hole 1/8" larger than support
box when projected onto roofline
2" minimum below
finished ceiling
Cathedral ceiling
support box
Level
Vertical Termination
Configurations
Figure 38 and Figures 39 through 41 on
page 17 show four different configurations
for vertical termination. All connections
must be sealed with high temperature sili-
cone sealant as specified in the second warn-
ing statement on page 11.
Venting with One 90
°
Elbow
Vertical (V)
Horizontal (H)
5' min.
2' max.
6' min.
4' max.
7' min.
6' max.
8' min.
8' max.
20' max.
8' max.
Figure 38 - Vertical Rigid Venting
Configuration Using One 90
°
Elbow
Note: Install
restrictor into 4"
collar of burner
system as shown.
