35
5608 741 - 04
Vitodens Rigid and Flex Venting Systems Installation
Direct Venting (Two-pipe System)
Vent Requirements - Stainless Steel
(continued)
Additional requirements for stainless steel vent pipe
material
(continued)
Parallel adaptor for two-pipe system
Supplier
Boiler Model
Ø in. (mm)
Quantity
Viessmann
WB2B 45, 60
B2HA 45, 60
B2HB 45, 57
3 (76)
(See ‘a’ in illustration below)
1
WB2B 80, 105
B2HA 80, 88, 100, 112, 150
4 (102)
(See ‘a’ in illustration below)
1
Legend
A
Air intake, max. insertion 2½ in. (64 mm) (use sheet
metal screws to hold in place)
B
Viessmann parallel adaptor
C
Stainless steel slip joint vent starter adaptor
Legend
A
Air intake, max. insertion 2½ in. (64 mm) (use sheet
metal screws to hold in place)
B
Viessmann parallel adaptor
C
Stainless steel slip joint vent starter adaptor
Parallel vent pipe starter adaptors for:
WB2B 45, 60
B2HA 45, 60, B2HB 45, 57
Parallel vent pipe starter adaptors for:
WB2B 80, 105
B2HA 80, 88, 100, 112, 150
B
A
C
B
A
C
3 in. (76 mm)
b 2¾ in. (70 mm)
c 7 in. (178 mm)
d approx. 10¾ in. (271 mm)
e 4¾ in. (120 mm)
4 in. (100 mm)
b 5
d
in. (130 mm)
c 9
e
in. (237 mm)
d 12
7
/
16
in. (327 mm)
e 5½ in. (140 mm)
Flue
Air
Flue
Air