Electrical connections
6 720 645 504 (2011/04) en
35
11.4.5 Power supply (HC 22 - 33)
Fig. 26
1 X1 The terminal block in the heat pump
2 The PEL card where the EVU signal is connected
3 PE (protective earth)
Standard design without EVU
The terminal blocks are strapped at the factory to a
common power supply. Connected to PE, 1N, 1L1, 1L2
and 1L3.
Fig. 27 Standard design
1 Supply, Heat pump
Alternative A
The power supply can also be connected as low tariff
from the EVU control unit. During a cut-off period, the
control unit is supplied with 1-phase, L1, high tariff. They
are connected to PE, 3N and 2L1. Signal from the control
unit via EVU control is connected to terminal blocks 1
and C on the PEL card. During a cut-off period, the
contact is closed. The terminal straps between 1N-3N
and 1L1-2L1 are removed.
Fig. 28 Connections Alternative A
1 Supply, 1-phase L1 to control unit by EVU
2 Supply, heat pump
2
1
3
6720614967-21.1I
EVU means a special electrical connection
used primarily in countries like Germany and
Austria.
1
6 720 616 938-7.1I
6 720 616 938-8.1I
2
1
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