Superior MHW36R Installation And Operation Instructions Manual page 10

VENTING INSTALLATION
Continued
USING ELBOW OFFSETS (30E-8DM)
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 14).
OFFSET RISE
A B
4 / " 16 / "
3 3
8 8
9" 25 / "
3
4
11 / " 31"
7
8
15" 37 / "
3
8
16 / " 40 / "
3 1
4 2
20" 47 / "
1
8
22 / " 52 / "
5 1
8 8
25 / " 57 / "
1 7
2 8
27 / " 62"
5
8
30 / " 67 / "
3 1
8 4
33" 72 / "
5
8
35 / " 78"
3
4
37 / " 82"
7
8
41 / " 88 / "
1 5
4 8
43 / " 92 / "
3 3
8 4
46 / " 99 / "
5 3
8 8
48 / " 103 / "
3 1
4 2
51 / " 108 / "
1 7
2 8
54 / " 114 / "
1 1
4 8
57" 119 / "
1
2
59" 123 / "
5
8
61 / " 129"
3
4
64 / " 134 / "
1 3
2 8
67 / " 139 / "
1 5
4 8
OFFSET CHART (22-50 FT. SYSTEM HEIGHT)
Screws
Figure 14 - Elbow Offset
10
CHIMNEY LENGTH
48" 36" 24" 18" 12"
ELBOW SET ONLY
1
1
1
1
1 1
1
1 1
1
1 1
2
1 1
1 1
2 1
2
1 1 1
2
2 1
1 2
2 1
1 2
1 2 1
4
B
A
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2. Chimney weight above offset rests on return elbow. Straps must be
securely nailed to rafters or joists (see Figure 15, details A and B).
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 14).
4. All pipe connections between offset and return must be secured with
two screws on outer pipe only (see Figure 16). Do not penetrate inner
stainless.
1
1
Straps
Detail B
1
Angle Firestop
1
Straps
Detail A
1
Return Elbow
Figure 15 - Ceiling Support Pipe 12S-8DM
1
1
Straps
See Detail B
Straps
See Detail A
127312-01D