Viessmann Vitodens 200-W Installation Instructions Manual page 25

Hydraulic connections
System boiler using separate connections for DHW Cylinder & heating circuits
(4 pipes)
A
DHW cylinder
B
Boiler
C
Heat exchanger
D
Circulation pump
Note
• The flow and return pipes to the cylinder
can be connected either way round,
however the optimum method would be
to connect the flow pipe to the bottom
connection of the cylinder
G G
E
Three port diverter valve
F
Heating circuit
G
DHW Circuit
• This hydraulic circuit must be chosen if
the controls are upgraded to allow for
weather compensation.
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