65
Note
■ The power supply to the control circuit
must not be able to be interrupted by
the power supply utility. The control
circuit therefore requires a separate
power supply.
■ A separate control unit connection to
safeguard the power supply of the con-
trol unit in the case of a load discon-
nect by the power supply utility
requires a change to the internal wir-
ing. This may only be carried out by an
electrician according to the electrical
wiring diagram. See wiring diagram.
■ The control circuit power supply and
the cable for the power-OFF signal can
be combined in one 5-core cable.
Cable lengths in the heat pump plus wall clearance:
Type
BW
WW
Heat pump control unit power supply (400 V~)
3.0 m
Additional connecting cables
2.0 m
Connections, heat pump load connection
Vitocal type 352.A027/
SA
352.A034/
SA
352.A056/
SA
352.A076/
SA
352.A097/
SA
Connection
cross-sec-
tion, HP cir-
cuit breaker
35 mm
2
35 mm
2
35 mm
2
50 mm
2
70 mm
2
Torque, HP
circuit break-
er
8 Nm
8 Nm
8 Nm
12 Nm
12 Nm
Connection
cross-sec-
tion, PE ter-
minal op-
tions
35 mm
2
35 mm
2
35 mm
2
50 mm
2
70 mm
2
Torque, PE
terminal op-
tions
8 Nm
8 Nm
8 Nm
12 Nm
12 Nm
Installation sequence
Power supply
(cont.)
5848 449 GB
Installation
