Viessmann Vitocal 300-G BW, Installation And Service Instructions Manual

Page: 92 / 216

92
Note
If the compressor and/or the instantane-
ous heating water heater are operated at
a lower tariff (power-OFF), provide an
additional cable for the switching contact
"power-OFF" (e.g. NYM 3x1.5 mm
2
)
from the distribution board (meter box) to
the heat pump.
Size the cross-section of the power sup-
ply lines in accordance with the connec-
ted load of the relevant appliance.
400 V~ 3/N/PE
400 V~ 3/PE
230 V~ 1/N/PE
A Control unit
Recommended power supply cable:
3 x 1,5 mm
2
B Instantaneous heating water heater
(accessories)
Recommended power supply cable
■ 9 kW: 5 x 2.5 mm
2
(delivered con-
dition)
C Compressor
Recommended cable: 5 x 2.5 mm
2
Control unit power supply
230 V, 50 Hz
1 / N / PE
L1 L1
A
?
L2
L3
N
A Mains terminals inside the heat
pump
Note
This supply must never be blocked.
■ Max. fuse rating 16 A
■ Standard tariff (no optional low tariff
with power-OFF)
Compressor power supply connec-
tion
L1
A
? ?
L2
L3
L2
L3
N
400 V, 50 Hz
3 / PE
L1
A Mains terminals inside the heat
pump
Note
The backup fuses must have Z charac-
teristics for appliances with full wave soft
starter (see specification or type plate).
■ Low tariff and power-OFF can be
used.
■ Fuse protection in accordance with the
compressor rating (see specification).
Installation sequence
Power supply
(cont.)
5368 522 UAE