Viessmann VITODENS 200-W Technical Manual page 13

Vitodens 200-W
(cont.)
Note
Observe further details regarding the use of a low loss header (see
page 45).
If the residual head of the circulation pump available as an accessory
is insufficient to overcome the following system pressure drop values,
install an additional, external circulation pump on site.
In such cases, use a low loss header.
Pressure drop on the heating water side
For sizing a circulation pump on site (when connecting to a DHW cyl-
inder connection set)
60 600
50 500
400
40
30 300
20 200
10 100
0 0
0 1000
Flow rate in l/h
VITODENS 200-W
2000 3000 4000 5000 6000 7000
1
VIESMANN
13