Viessmann VITOCAL 242-S Installation And Service Instructions Manual page 55

Power supply
(cont.)
■ In conjunction with on-site power con-
sumption (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 compres-
sor with power generated on site.
■ Protect the power supply to the heat
pump control unit with an MCB/ fuse of
max. 16 A.
■ For accessories and external compo-
nents that are not to be connected to
the heat pump control unit, connect the
power supply on the same phase as
the heat pump control unit; we recom-
mend using the same MCB/fuse.
Connection to the same MCB/fuse
provides additional safety when the
power is switched off. Observe the
power consumption of the connected
consumers.
Heat pump control unit power supply 230 V~
X3
6
7
8
9
16
16
18
F1 T6,3AH
L1 N
X2 X1
N
N
3
1 1
Installation sequence
Note
This supply must never be blocked.
■ Max. fuse rating 16 A
■ Standard tariff (no economy tariff with
power-OFF possible)
■ Recommended power cable:
2
3 x 1.5 mm (5 x 1.5 mm
OFF)
2
with power-
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