46
Electrical connection requirements
Note
The type and cross-section of connecting cables must
be determined by an authorised electrician in accord-
ance with the local regulations.
Fuses
Type
Main cable
Control cable
BW 302.D090
100 A
25 A
BW 302.D110
125 A
25 A
BW 302.D140
125 A
25 A
BW 302.D180
160 A
25 A
BW 302.D230
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
Power supply with power-OFF without on-site load disconnect (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.
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.
Note
Observe the technical connection conditions of the rel-
evant power supply utility.
X3.7
X3.6
C
B
A
H
F
E
5
4
3
3
4
4
3
3/N
3/N
4
G
kWh
kWh
D
K
Fig. 34
Diagram excluding MCB/fuses and RCD
A
Heat pump control unit
B
Instantaneous heating water heater
C
Compressor
D
Heat pump control unit power supply
E
Premium tariff meter
F
Backup fuse, ripple control receiver
G
Ripple control receiver (contact open: power-OFF
enabled) TNC system feed
H
Economy tariff meter
K
Feed in: TNC system
Installation sequence
Power supply
(cont.)
5838144
Installation
Summary of Contents for Vitocal 300-G Pro BW 302.D090
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