Power Supply With Power-Off - Viessmann Vitocal 300-G Pro SPS Installation And Service Instructions For Contractors

Power supply
(cont.)
In conjunction with power-OFF: Power circuit (400 V~) and control circuit (230 V~) on site
Type
BW 301.BS090
BW 302.BS090
WW 301.BS125
WW 302.BS125
BW 301.BS120
BW 302.BS120
WW 301.BS155
WW 302.BS155
BW 302.BS150
WW 302.BS200
BW 302.BS180
WW 302.BS250
BW 302.BS250
WW 302.BS300
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
Control circuit power supply (230 V~, if on site)
Power circuit power supply (400 V~)
Additional connecting cables

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.
Electronic soft starter, type SMC
Electronic soft starter functions:
■ Monitoring the compressor mains feed
Reducing the compressor starting current during the
■
starting procedure
Control circuit (230 V~)
Cable cross-section
2
5 x 2.5 mm
2
5 x 2.5 mm
2
5 x 2.5 mm
2
5 x 2.5 mm
5 x 2.5 mm 2
Power circuit (400 V~)
Cable cross-section
2
5 x 35 mm
2
5 x 50 mm
2
5 x 70 mm
2
5 x 95 mm
With cable lug for M8
5 x 120 mm 2
With cable lug for M8
Note
Observe the technical connection conditions of the rel-
evant power supply utility.
Delivered condition:
■ Rotating field, phase asymmetry: 20 %
Max. compressor operating current "Imax": Subject
■
to compressor output
Installation sequence
Max. cable length
40 m
40 m
40 m
40 m
40 m
BW
WW
3 m
3 m
2.5 m
39