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111099-01D 7
VENTING INSTALLATION
Continued
Continue to assemble chimney sections as outlined,
making sure that both the inner and outer pipe sec-
tions are locked together. When installing double
wall snap-lock chimney together, it is important
to assure the joint between the chimney sections
is locked. Check by pulling chimney upward after
locking. The chimney will not come apart if prop-
erly locked. It is not necessary to add screws to
keep the chimney together (exception - see Figure
9, page 8).
1. To achieve desired offset, you may install
combinations of 12", 18", 24", 36" and 48"
length of double wall pipe (see offset chart
and Figure 7).
2.
Chimney weight above offset rests on return
elbow. Straps must be securely nailed to rafters
or joists (see Figure 8, details a & b on page 8).
3. Maximum length of pipe between supports
(return elbow or 12S-8DM) is 6' of angle run.
Maximum of two 6' angle run sections per
chimney system (see Figure 7).
4. All pipe connections between the offset and
return must be secured with two screws on the
outer pipe only (see Figure 9, page 8). Do not
penetrate the inner stainless.
RISE
A B 48" 24" 18" 12"
4
3
/
8
" 16
3
/
8
"
ELBOW SET ONLY
9
3
/
4
" 25
1
/
2
"
1
12
3
/
4
" 30
3
/
4
"
1
15" 34
3
/
4
"
1
18" 40"
1 1
21
1
/
4
" 46
1
/
4
"
1
23
3
/
4
" 49
1
/
4
"
1 1
27
3
/
4
" 56
3
/
4
"
1
30" 60
3
/
4
"
1 1
33" 66"
1 1
36" 71"
1 1
38
1
/
4
" 75"
2
41
1
/
4
" 80
1
/
4
"
1 1 1
45" 86
3
/
4
"
2
46
3
/
4
" 89
1
/
2
"
1 1 1
51" 97"
1 1
53
1
/
4
" 101"
2 1
56
1
/
4
" 106
1
/
4
"
2
59
1
/
4
" 111
1
/
2
"
1 1 1
61
3
/
4
" 115
1
/
2
"
2 1
64
3
/
4
" 120
3
/
4
"
2 1
68
1
/
4
" 127"
1 2
70" 130"
2 1 1
74
1
/
4
" 137
1
/
2
"
1 2 1
76
3
/
4
" 141
1
/
2
"
1 2 1
79
3
/
4
" 146
3
/
4
"
4
OFFSET CHART (22-50 FT. SYSTEM HEIGHT)
Figure 7 - Typical Offset Terminations
Return
Elbow
Offset
Elbow
Return
Elbow
Offset
Elbow
6' Max.
6' Max.
6' Max.
6' Max.
6' Max.
6' Max.
Return
Elbow
Offset
Elbow
Offset
Elbow
Return
Elbow
A B C
Offset
Elbow
Ceiling
Support Pipe
12S-8DM
Return
Elbow