39
In conjunction with power-OFF: Power circuit (400 V~) and control circuit (230 V~) on site
Type
Control circuit (230 V~)
Cable cross-section
Power circuit (400 V~)
Cable cross-section
Max. cable length
BW 301.BS090
BW 302.BS090
WW 301.BS125
WW 302.BS125
5 x 2.5 mm
2
5 x 35 mm
2
40 m
BW 301.BS120
BW 302.BS120
WW 301.BS155
WW 302.BS155
5 x 2.5 mm
2
5 x 50 mm
2
40 m
BW 302.BS150
WW 302.BS200
5 x 2.5 mm
2
5 x 70 mm
2
40 m
BW 302.BS180
WW 302.BS250
5 x 2.5 mm
2
5 x 95 mm
2
With cable lug for M8
40 m
BW 302.BS250
WW 302.BS300
5 x 2.5 mm
2
5 x 120 mm
2
With cable lug for M8
40 m
Note
■
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 wiring diagram.
■
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 wall clearance:
Type
BW
WW
Control circuit power supply (230 V~, if on site)
3 m
Power circuit power supply (400 V~)
3 m
Additional connecting cables
2.5 m
Power supply with power-OFF
Power-OFF without on-site load disconnection (delivered condition)
The power-OFF signal is connected directly to the heat
pump control unit via floating contact. The compres-
sors are shut down when power-OFF is enabled.
Note
Observe the technical connection conditions of the rel-
evant power supply utility.
Electronic soft starter, type SMC
Electronic soft starter functions:
■
Monitoring the compressor mains feed
■
Reducing the compressor starting current during the
starting procedure
Delivered condition:
■
Rotating field, phase asymmetry: 20 %
■
Max. compressor operating current "Imax": Subject
to compressor output
Installation sequence
Power supply
(cont.)
5549 991 GB
Installation
Summary of Contents for 301.BS090
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