Viessmann VITOCAL 242-G Installation And Service Instructions Manual page 76

Installation sequence
Power supply
(cont.)
In negotiations with your power sup-
ply utility, different feed tariffs for the
main power circuits may be offered.
The control unit/electronics feed
must be implemented without possi-
ble blocking from the power supply
utility; tariffs that are subject to possi-
ble shutdowns must not be applied to
these feeds.
400 V~ power supply, various tariffs
Three separate power cables
Selective power-OFF for compressor and instantaneous heating water heater
possible
The cross-section of the power cables must be appropriate for the connected
load of the relevant unit.
A Control unit
Recommended power cable: 3 x
2
1.5 mm
B Instantaneous heating water hea-
ter
Recommended power cable
6 kW: 5 x 1.5 mm
9 kW: 5 x 2.5 mm
C Compressor
Recommended power cable: 4 x
2
1.5 mm
76
The allocation of the power-OFF (for
compressor and/or instantaneous
heating water heater) is made via the
control unit settings (see pages 150
and 155). Blocking of the main supply
is limited to max. 3 times 2 hours per
day (24 h) in Germany.
2
2