Viessmann VITOCAL 222-S Installation And Service Instructions Manual page 39

Electrical connections
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 LV connecting leads (sensors, KM
BUS) < 42 V
D Type AWT-AC 221.A10, A13, B10,
B13:
12 V BUS cable: Routing in the
230 V~ voltage range (for connec-
tion, see page 51)
(cont.)
E Type AWT-AC 221.A04 and
221.A07:
43 V BUS cable: Routing in the
230 V~ voltage range (connection,
see page 51)
F Heat pump control unit power cable
230 V~
Installation sequence
39