Adaptors; Increaser / Transition Adaptors; Vent Length Requirements; Maximum Vent Pipe Length - Vertical - Viessmann Vitodens 100-W WB1B Series Installation Instructions Manual

Flexible Venting Installation

Adaptors

Increaser / transition adaptors

Fig. 19
This boiler adaptor is shown installed
with an increaser adaptor (if required
for 80 mm system) for models WB1B
26, 35, WB2B 19, 26 25, B2HA 19,
28, 35, B2HB 19, 26, 35, B2TA 19,
35 and B2TB 19, 35.
Legend
a 5b in. (140 mm)

Vent Length Requirements

Maximum vent pipe length - vertical

Fig. 22
Table 9. Maximum allowable equivalent length - vertical
Boiler Model
WB1B 26, 35
WB2B 19, 26, 35, B2HA 19, 28, 35, B2HB 19, 26, 35
B2TA 19, 35, B2TB 19, 35
WB2B 45, 60, B2HA 45, 60
WB2B 80, 105, B2HA 80, 100, 112
B2HA 150
Single Pipe Venting (Room Air Dependent)
Fig. 20
This boiler adaptor is shown installed
with a required transition adaptor for
models WB2B 80, 105, B2HA 80,
100, 112, 150. Required only with
M&G / Duravent system.
Legend
b 7b in. (191 mm)
Note: For combination of different vent/air intake pipe
Legend
A Combustion air intake (left, right or through co-axial
B Combustion air opening
a
1 Pipe support
* There is an input de-rate of 9% for model B2HA 150
when a 4 in. diameter vent pipe is used.
** 4 in. to 5 in. increaser field supplied.
System Ø
See note below
2 in. (50 mm)
3 in. (80 mm)
4 in. (100 mm)
2 in. (50 mm)
3 in. (80 mm)
4 in. (100 mm)
3 in. (80 mm)
4 in. (100 mm)
4 in. (100 mm) or
4.3 in. (110 mm)
4 in. (100 mm)*
5 in. (125 mm)**
Fig. 21
This boiler adaptor is shown (pre-
installed) for models WB2B 45, 60,
B2HA 45, 60.
The connecting rigid pipe (PPs) fits
directly into the boiler adaptor.
Legend
c 2b in. (64 mm)
diameters, such as Ø 3 in. (80 mm) PP(s) flexible
vent with Ø 2 in. (50 mm) CVPC, PVC, ABS air
intake pipe, the total equivalent length must be
used for the smaller pipe diameter.
opening), remove and discard air intake cover for
(WB1B 26, 35, WB2B 19, 26, 35, B2HA 19, 28, 35,
B2HB 19, 26, 35, B2TA 19, 35 and B2TB 19, 35)
Equivalent vent length (exhaust)
Max. combined equivalent vent length
(a+b)
65 ft. (20 m)
123 ft. (37 m)
150 ft. (46 m)
84 ft. (26 m)
111 ft. (34 m)
135 ft. (41 m)
74 ft. (23 m)
111 ft. (34 m)
98 ft. (30 m)
98 ft. (30 m)
98 ft. (30 m)
25