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Cascade System Guide
Set-up for Cascade System with Vitocontrol-S
The following 4 drawings are general and provide
additional information for the different cascade systems.
These include preparing the Vitocontrol-S with the
connections to the boilers and the necessary coding
changes for a cascade system as well as various
accessories
.
Custom systems are available on request.
IMPORTANT
Configurations for 5, 6, 7 and 8 boilers are available with
a customized boiler control solutions from Viessmann.
Contact Viessmann (commercial projects) for boiler control
information and requests.
Heating Circuit / Boiler Pumps
We recommend the following (depending on
Model WB2B 80
20º F
t
25º F
t
30º F
t
35º F
t
40º F
t
Flow limitation L/h (GPM)
Model WB2B 105
20º F
t
25º F
t
30º F
t
35º F
t
40º F
t
Flow limitation L/h (GPM)
* UPS 32 - 160/2 can not be installed with the manifold option.
t):
Flow rate
Boiler pressure drop (ft.)
26.0
16.7
20.8
9.2
17.3
6.5
14.9
4.8
13.0
3.4
Flow rate
Boiler pressure drop (ft.)
35.0
30.0
28.0
20.0
23.3
12.5
20.0
9.0
17.5
6.4
(continued)
Recommended pump Grundfos
* UPS 32-160/2, 115V, Speed1
UPS 26-99FC, 115V, Speed3
UPS 26-99FC, 115V, Speed2
UPS 26-99FC, 115V, Speed2
UPS 26-99FC, 115V, Speed2
8000 (35.2)
Recommended pump Grundfos
* UPS 32-160/2, 115V, Speed3
* UPS 32-160/2, 115V, Speed2
* UPS 32-160/2, 115V, Speed1
UPS 26-99FC, 115V, Speed3
UPS 26-99FC, 115V, Speed2
8000 (35.2)
11
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