Operating instructions

31
Compressor power supply (400/230 V~)
Vitocal 242-G, 400 V~
L1
A
?
3/PE
400 V, 50 Hz
?
L2
L3
N
L1
L2
L3
A
Compressor mains terminals
behind contact shield (see
page 119).
Vitocal 242-G, 230 V~
L1
L1
N
N
?
?
1/N/PE
230V/ 50 Hz
L1
N
?
A
■ Fuse protection in accordance with the
compressor rating (see specification
on page 141/type plate).
For appliances with full wave soft
starter, the upstream fuses must have
Z characteristics.
■ Low tariff and power-OFF can be
used.
■ No parameters need to be set when
using low tariff with power-OFF. Dur-
ing the power-OFF period, the com-
pressor is shut down.
■ Recommended cable for the Vitocal
242-G, 400 V~: 5 x 2.5 mm
2
Recommended cable for the Vitocal
242-G, 230 V~: 3 x 4 mm
2
for cable
lengths up to 20 m; for cable lengths
> 20 m, a larger cable cross-section is
required.
Power supply with power-OFF
Power-OFF without on-site load dis-
connection
The power-OFF signal is connected
directly in the control unit. The compres-
sor is "forced" off when power-OFF is
enabled.
Parameter "Stage at power-OFF" is
used to determine whether and at what
stage the instantaneous heating water
heater (accessory) remains operational
(see page 97).
Note
Observe the technical connection condi-
tions of the relevant power supply util-
ity.
Installation sequence
Power supply
(cont.)
5441 603 GB
Installation