Boiler Connections
Pressure drop for models WB2 11-44 and 15-60
0
1
2
3
4
5
6
7
8
0
3.3
6.6
9.8
13.1
16.4
19.7
23
26
Pre
ssu
re
dr
op
ft.
m
0
2.2
4.4
6.6
8.8
11
13.2
Flow rate
15.4
1.1
0
500
1000
1500
2000
2500
3000
3500
250
ltr/h
GPM
24
Installation Examples
(continued)
Waterside flow
Typical system flow rates
Model
WB2
11-44
15-60
∆
t for NG
Output (NG)
Btu/h
153 000 205 000
20 ºF rise (GPM)
15.3
20.5
25 ºF rise (GPM)
12.2
16.4
30 ºF rise (GPM)
10.2
13.7
∆
t for LP
Output (LG)
Btu/h
138 000 191 000
20 ºF rise (GPM)
13.8
19.1
25 ºF rise (GPM)
11.0
15.3
30 ºF rise (GPM)
9.2
12.7
Use standard friction loss method for pipe sizing.
Observe boiler maximum flow rate limitations. If system flow rate exceeds
boiler maximum flow rate or if system flow rate is unknown, Viessmann strongly
recommends the installation of a low-loss header. See low-loss header Installation
Instructions for details.
Please note!
Low-loss header pressure drop is negligible.
Important!
The following examples depict possible piping layouts of the Vitodens 200 boiler
equipped with Viessmann System Technology.
For boiler and tank combinations, please install only feasible combinations listed in
the Viessmann Price List.
Please note that the examples below are simplified conceptual drawings only!
Piping and necessary componentry must be field verified.
A low water cut-off (LWCO) must be installed where required by local codes.
Proper installation and functionality in the field is the responsibility of the heating
contractor.
The following examples and the corresponding plug-in connection examples do
not follow the same alphabetical designation of components. Please take this into
consideration when cross-referencing between an installation example and the
corresponding plug-in connection example.
5285
960
v1
.2
If a DHW storage tank other than a
Viessmann Vitocell 100 or 300 tank
is used, the installer must verify
proper operation of the Viessmann
DHW sensor with the original
manufacturer of the tank. Viessmann
strongly recommends the installation
of a temperature tempering valve in
the DHW supply line.
WARNING
Summary of Contents for Vitodens 200 WB2 11-44
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