Viessmann VITOCAL 222-S Installation And Service Instructions Manual page 63

Power supply
(cont.)
Power supply, external unit (230 V~)
Vitocal 222-S, type AWT-AC
221.A04 221.A07
C N L ?
A
N L1
?
B
A Wiring chamber, external unit (see
page 59)
B Power supply 230 V/50 Hz
Vitocal 222-S, type
AWT-AC
Recommended power
cable
Fuse protection
■ Economy tariff and power-OFF can be
used.
■ No parameters need to be set when
using economy tariff with power-OFF.
The compressor is shut down during
the power-OFF period.
■ During power-OFF, the diagnostic
functions for the external unit are not
supported.
Ni Li N L
COM
? ?
0 0
? N L1
B
221.A04 221.A07
2
3 x 2.5 mm 3 x 2.5 mm
(max. 29 m) (max. 25 m)
B20A
Installation sequence
221.A10 and A13
C2 C1
N L
A
A
221.A10
2
3 x 2.5 mm
(max. 20 m)
3 x 4.0 mm
(max. 32 m)
B20A B20A
Note
Free terminals for internal use.
? N L
?
? N L1
B
221.A13
2 2
3 x 4.0 mm
(max. 20 m)
or
2 2
3 x 6.0 mm
(max. 30 m)
B32A
63