Venting Installation

Continued

Using ELBOW offsets (30E-12DM)

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).

OFFSET

RISE

 

CHIMNEY LENGTH

 

A

B

12"

18"

24"

36"

48"

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"

 

 

1

 

2

 

 

56 1/4"

106 1/4"

 

 

 

 

 

 

2

59 1/4"

111 1/2"

 

 

1

 

1

 

1

61 3/4"

115 1/2"

1

 

 

 

 

 

2

64 3/4"

120 3/4"

 

 

1

 

 

 

2

68 1/4"

127"

 

 

 

 

2

 

1

70"

130"

1

 

1

 

 

 

2

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)

2.Chimney weight above offset rests on return elbow. Straps must be securely nailed to rafters or joists (see Figure 8, details a and b).

3.Maximum length of pipe between supports (return elbow or 12S-12DM) 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 10). Do not penetrate the inner stainless.

See Detail A

2" Min.

Straps

Detail BStraps

See Detail B

Angle Firestop

 

Straps

Straps

Detail A

Return Elbow

Figure 8 - Ceiling Support Pipe

12S-12DM

 

Return

 

Return

 

 

Elbow

 

Elbow

 

Offset

 

Offset

 

Return

 

Elbow

 

 

Elbow

 

 

Elbow

6' Max.

 

 

6' Max.

Ceiling

 

 

 

 

Return

 

 

 

Support Pipe

 

 

Return

 

12S-12DM

6' Max.

Elbow

 

 

 

Elbow

 

 

 

 

 

 

 

 

 

6' Max.

Offset

Offset

 

 

 

 

 

 

Offset

 

Elbow

6' Max. Elbow

6' Max.

 

 

 

 

 

 

Elbow

 

 

 

 

 

 

A

 

B

C

 

 

Figure 7 - Typical Offset Terminations

 

 

www.desatech.com109493-01K

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Image 8
Desa ICBO# 3507 installation manual Using Elbow offsets 30E-12DM, Elbow SET only
Page 7 Page 9

ICBO# 3507 specifications

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