Viessmann VITOCAL 242-S Installation And Service Instructions Manual page 56

Installation sequence
Power supply
External unit power supply 230 V~/400 V~
■ 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.
External unit power supply 230 V~
Type AWT-AC
241.A04
C N L ?
A
N L1
?
B
A Wiring chamber, external unit: See
page 52.
B Power supply 230 V/50 Hz
Type AWT-AC
Recommended power
cable
Fuse protection
56
(cont.)
241.A07
Ni Li
COM
? ?
? N L1
241.A04
3 x 2.5 mm
(max. 29 m)
B20A
Note
Free terminals for internal use.
241.A10 and A13
N L
0 0
C2 C1
A
B
241.A07 241.A10
2 2
3 x 2.5 mm
(max. 25 m)
B20A
N L ? N L
?
A
? N L1
B
241.A13
2
3 x 2.5 mm 3 x 4.0 mm
(max. 20 m) (max. 20 m)
or
3 x 4.0 mm 2 3 x 6.0 mm
(max. 32 m) (max. 30 m)
B20A
2
2
B32A