Viessmann Vitodens 100-W WB1B Series Installation Instructions Manual page 16

Direct Venting (Two-pipe System)
Parallel Adaptor
Table 4. Parallel adaptor for two-pipe system
Supplier
Viessmann or Centrotherm
Viessmann
Parallel vent pipe starter adaptors for WB2B 45, 60, 80, 105,
and B2HA 45, 60, 80, 100, 112, 150
Fig. 8
Legend
for 45, 60
A Air intake, max. insertion 2b in. (64 mm)
B Viessmann or Centrotherm parallel adaptor
C Used only on WB2B 80, 105, B2HA 80, 100, 112, 150*
D Viessmann CPVC adaptor
a 3 in. (80 mm)
b 2c in. (70 mm)
c 7 in. (178 mm)
d Approx. 10c in. (271 mm)
e 4c in. (120 mm)
16
Boiler Model
WB2B 45, 60

B2HA 45, 60

WB2B 80, 105

B2HA 80, 100, 112, 150

Ø in. (mm)
3 (80)
(see a in fig. 8)
4 (110)
(see a in fig. 8)
Flue
Legend
for 80, 105
A Air intake, max. insertion 2b in. (64 mm)
B Viessmann parallel adaptor
C Slip joint vent starter / transition adaptor 4e to 4 in.
(110 to 100 mm) only required if M&G / Duravent
system is used
D Viessmann CPVC adaptor
a 4 in. (100 mm)
b 5d in. (130 mm)
c 9e in. (237 mm)
d 12 / in. (327 mm)
7
8
e 5b in. (140 mm)
Flexible Venting Installation
Quantity
1
1
Air