Operating instructions

30
Power cables
The power supply is separated into three
areas with three power cables:
Vitocal 242-G, 400 V~
B
C
A
400 V~ 3/PE
400 V~ 3/N/PE
230 V~ 1/N/PE
A
Control unit power supply
B
Compressor power supply
C
Power supply to instantaneous
heating water heater (accessory;
see separate installation instruc-
tions)
Vitocal 242-G, 230 V~
B
C
A230 V~ 1/N/PE
230 V~ 1/N/PE
230 V~ 1/N/PE
Control unit power supply (230 V~)
L1X3.18
NX2.1
?X1.1
A
1/N/PE
230 V/ 50 Hz
A
Mains terminals on the 3 rows of
screw terminals (see page 125)
Note
This supply must never be blocked.
■ Max. fuse rating 16 A
■ Standard tariff (no optional low tariff
with power-OFF)
■
Recommended cable: 3 x 1.5 mm
2
Installation sequence
Power supply
(cont.)
5441 603 GB