Viessmann Vitocal 200-G Series Installation And Service Instructions Manual page 42

Installation sequence
Power supply
(cont.)
In negotiations with your power supply utility, differ-
■
ent supply tariffs for the main power circuits may be
offered.
Observe the technical connection conditions of the
power supply utility.
If the compressor and/or instantaneous heating
■
water heater are operated at an economy tariff
(power-OFF), either provide an additional cable (e.g.
2
3 x 1.5 mm ) for the power-OFF signal from the dis-
tribution board (meter box) to the heat pump control
unit.
or
Combine the cables for the power-OFF signal and
for the heat pump control unit power supply
2
(3 x 1.5 mm ) in a 5-core cable.
■ The assignment of the power-OFF (for compressor
and/or instantaneous heating water heater) is made
via the type of connection and by setting parameters
in the heat pump control unit.
In Germany, the power supply can be cut for a maxi-
mum of 3 x 2 hours per day (24 h).
■ The heat pump control unit/PCB must be supplied
without power-OFF. Tariffs subject to possible shut-
down must not be used here.
Heat pump control unit power supply 230 V~
X40
L N
L1 N
1/N/PE
230 V/50 Hz
Fig. 32
Compressor power supply 230 V~
L1 N
L1 N
3/N/PE 230 V/50 Hz
Fig. 33
42
When using power generated on site (use of power
■
generated by the PV system to meet own require-
ments):
During the power-OFF period, it is not possible to
operate the compressor utilising power generated on
site.
Protect the power cable to the heat pump control unit
■
with an MCB/fuse of max. 16 A.
■ For accessories and external components that will
not be connected to the heat pump control unit, pro-
vide the power supply via the same MCB/fuse, or at
least on the same phase, as the heat pump control
unit.
Connection to the same MCB/fuse provides addi-
tional safety when the power is switched off.
Observe the power consumption of the connected
consumers.
■ If the mains connection is made with a flexible power
cable, it must be ensured that the live conductors are
pulled taut before the earth conductor in the event of
strain relief failure. The length of the earth conductor
wire will depend on the design.
Note
This supply must never be blocked.
■ Max. fuse rating 16 A
■ Standard tariff: No economy tariff with power-OFF
possible for the heat pump control unit
Recommended power cable:
■
2
3 x 1.5 mm
■ Recommended power cable with power-OFF for
compressor/instantaneous heating water heater:
5 x 1.5 mm 2
■ 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 time.
Cable Max. cable length
2
3 x 2.5 mm
Fuse rating
25 m 16 A