39
2-stage (type BW 351.B + BWS 351.B)
X3.7
X3.6
C
B
A
H
D
F
E
5
4
3
3
4
4
3
3/N
3/N
≈
4
G
kWh
kWh
K
4
Fig. 25
Shown without fuses and RCDs
A
Heat pump control unit (connection on cross con-
nect PCB)
B
Instantaneous heating water heater (if installed)
C
Compressor, heat pump stage 1 (type BW 351.B)
D
Premium tariff meter
E
Ripple control receiver (contact open: Power-OFF
enabled)
F
Backup fuse, ripple control receiver
G
Feed: TNC system
H
Economy tariff meter
K
Compressor, heat pump stage 2 (type BWS 351.B)
Power supply with power-OFF: With on-site load disconnect
The power-OFF signal is connected to the on-site con-
tactor of the economy tariff power supply and to the
heat pump control unit. When power-OFF is enabled,
the compressor and the instantaneous heating water
heater (if installed) are "forced" off; in the 2-stage ver-
sion (types BW + BWS)
both
compressors
and
the
instantaneous heating water heater are switched off.
Note
Observe the technical connection conditions of the rel-
evant power supply utility.
Installation sequence
Power supply
(cont.)
5855006
Installation
