Viessmann VITOCAL 300, Installation And Service Instructions Manual

Page: 35 / 160

Connection
A
Zero volt contact of the control
unit
B
Terminal strip, Vitocal 300
C
alternative
Zero volt contact (N/O)
Breaking capacity: 230 V
∼
, 5 A
Note
The fault message is issued 10 sec-
onds after the fault occurs.
Primary pump (only for type WWC)
For the Vitocal 300, type WWC, the
integral pump provides the circulation
in the intermediate circuit.
Provide and wire the primary pump on
site. The control signal for the contactor
(on-site) can be drawn from contactor
K32 (switching the intermediate
pump). Provide the power supply to
the power circuit on site and match it
to the pump rating.
Central fault message
35
Installation sequence
55
92
901
GB