Viessmann VITOCAL 222-S Installation And Service Instructions Manual page 48

Installation sequence
Electrical connection
A Power cables to switching module
for instantaneous heating water
heater 230 V~/400 V~
B Connecting cables for 230 V~ func-
tion components
C Low voltage connecting cables
(sensors, KM BUS) <42 V
D Type AWT-AC 221.A10 and A13:
12 V BUS cable: Routing in the
230 V~ voltage range (for connec-
tion, see page 60)
48
(cont.)
E Type AWT-AC 221.A04 and A07:
F Heat pump control unit power cable
43 V BUS cable: Routing in the
230 V~ voltage range (connection,
see page 60)
230 V~