Viessmann Vitocal 300-G Installation And Service Instructions Manual page 99

Power supply
(cont.)
Power-OFF with on-site load disconnection
The power-OFF signal is connected to
the on-site contactor of the economy tar-
iff power supply and in the heat pump
control unit. When power-OFF is ena-
bled, the compressor and the instanta-
neous heating water heater (if installed)
are "forced" off, and in the two-stage ver-
sion (type BW 301.A + BWS 301.A),
both compressors and the instantane-
ous heating water heater.
Single stage
X3.7
A
X3.6
3
D
E
3
kWh
3/N
F G
4
Diagram excluding fuses and RCD.
Note
Observe the technical connection condi-
tions of the relevant power supply util-
ity.
B
≈
4
K
Installation sequence
C
5 4
3
kWh
3/N
H
4
99