50
Type
Power circuit (400 V~)
Cable cross-section
Max. cable length
BW 302.B180
WW 302.B250
5 x 95 mm
2
With cable lug for M8
40 m
BW 302.B250
WW 302.B300
5 x 120 mm
2
With cable lug for M8
40 m
In conjunction with power-OFF: Load circuit (400 V~) and control circuit (230 V~) on site
Type
Control circuit
(230 V~)
Cable cross-section
MCB/fuse protec-
tion, trunk line
Power circuit (400 V~)
Cable cross-section
Max. cable
length
BW 301.B090
BW 302.B090
WW 301.B125
WW 302.B125
5 x 2.5 mm
2
100 A
5 x 35 mm
2
40 m
BW 301.B120
BW 302.B120
WW 301.B155
WW 302.B155
5 x 2.5 mm
2
125 A
5 x 50 mm
2
40 m
BW 302.B150
WW 302.B200
5 x 2.5 mm
2
160 A
5 x 70 mm
2
40 m
BW 302.B180
WW 302.B250
5 x 2.5 mm
2
200 A
5 x 95 mm
2
With cable lug for M8
40 m
BW 302.B250
WW 302.B300
5 x 2.5 mm
2
250 A
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 connection for the control circuit calls for
the internal wiring to be changed. This wiring work
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)
2.5 m
Load circuit power supply (400 V~)
2.5 m
Additional connecting cables
2.0 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 "forced off" when power-OFF is enabled.
Parameter
"Output for instant. heating water heater
at power-OFF 790A"
determines whether and at what
stage an instantaneous heating water heater (if instal-
led) remains operational during power-OFF.
Installation sequence
Power supply
(cont.)
5549 984 GB
Installation
Summary of Contents for KWT BW 301.B090
Page 99: ...99 5549 984 GB...
