Single Wall Venting (Room Air Dependent)
70
Vent Length Requirements
Maximum vent pipe length - horizontal
Size the exhaust vent pipe as specified
in the table on the left. This table lists
the maximum allowable vent length in
ft. and meters of the exhaust piping.
Vent diameter must not be reduced at
any point in the installation.
Table 46. Maximum allowable equivalent length - horizontal
Boiler Model
System Ø
Max. equivalent
vent length (a)
H
WB1A 8-24, 8-30
2” / 51mm
*1
3” / 76mm
4” / 102mm
*2
33ft. / 1m
52ft. / 16m
66ft. / 20m
H
WB2 6-24C, 6-24
3” / 76mm
4” / 102mm
52ft. / 16m
63ft. / 19.2m
H
WB2 8-32
3” / 76mm
4” / 102mm
40ft. / 12m
50ft. / 15.2m
H
WB2 11-44
4” / 102mm
52ft. / 16m
H
WB2 15-60
4” / 102mm
40ft. / 12m
*1
2” diameter system only available with CPVC system
*2
4” (3” to 4” increaser field supplied. Do not order Viessmann 4” parallel adaptor).
Maximum of five 90° elbows allowed in the entire vent system. See Fig. 47
Minimum vent length is 3.3 ft. / 1m.
Legend
Support system
Exhaust vent termination
Combustion air intake
Combustion air opening
a
Equivalent vent length (exhaust)
5
2
8
5
2
6
8
v
3
.8
First elbow not included in equivalent
vent calculation.
Always include vent termination length
in calculations.
IMPORTANT
Fig. 60
Field supplied
exhaust vent pipe
and fittings
Side wall
Caulk here
(exterior caulking)
Starter adaptor
Flue
a
Содержание Vitodens 100-W WB1A-24
Страница 78: ...78 5285 268 v3 8 ...
Страница 79: ...79 5285 268 v3 8 ...