52
Danger
Incorrectly executed electrical installations can
result in injuries from electrical current and dam-
age to the appliance.
Connect the power supply and implement all
safety measures (e.g. RCD circuit) in accord-
ance with the following regulations:
■
IEC 60364-4-41
■
VDE regulations
■
Technical connection requirements specified
by the local power supply utility
Danger
The absence of system component earthing can
lead to serious injury from electric current if an
electrical fault occurs.
■
Re-establish all earth connections of the heat
pump.
■
Heat pump and pipework
must
be grounded
to the equipotential bonding of the building.
Danger
Incorrect core assignment can result in serious
injury and damage to the appliance.
Never interchange cores "L" and "N".
■
Consult your power supply utility, which may offer dif-
ferent supply tariffs for the power circuits.
Observe the technical connection requirements of
the power supply utility.
■
The power-OFF assignment is made via the type of
connection.
In Germany, the power supply can be cut off for up to
3 x 2 hours per day (24 h).
■
The control circuit must be supplied with power
with-
out
blocking by the power supply utility, so a sepa-
rate power supply is required for the control circuit.
■
A separate power supply for the control circuit
necessitates a change to the internal wiring. This
may only be carried out by an electrical contractor
according to the connection diagram.
■
Protect the power cable to the heat pump control unit
with a fuse of max. 25 A.
Information on the compressor power supply
(power circuit)
■
!
Please note
Incorrect phase sequence can cause damage
to the appliance.
Make the compressor power supply
only
in
the phase sequence specified (see terminals)
with a
clockwise
rotating field.
■
The compressor power fuses must have C charac-
teristics.
Control circuit power supply (230 V~) and power circuit (400 V~)
Make connection in accordance with the separate
"Connection and wiring diagram".
Electrical connection requirements
Note
Types and cross-sections of connection cables/leads
must be determined by an authorised electrician in
accordance with local regulations.
Fuses
Type
Main cable
Control cable
BW 302.DS090
100 A
25 A
BW 302.DS110
125 A
25 A
BW 302.DS140
125 A
25 A
BW 302.DS180
160 A
25 A
BW 302.DS230
200 A
25 A
Note
The control circuit power supply and the cable for the
power-OFF signal can be combined in a single 5-core
cable.
Cable lengths in the heat pump plus distance to
wall
Control circuit power supply (230 V~ if on
site)
3 m
Power circuit power supply (400 V~)
3 m
Additional connecting cables
2 m
Installation procedure, heat pump
Power supply
(cont.)
5837251
Installation
