41
2-stage (type BW 351.B + BWS 351.B)
C
B
A
≈
F
H
5
4
3
4
4
3
3/N
3/N
K
4
kWh
kWh
3
E
D
X3.7
X3.6
L
4
G
Fig. 27
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
Control unit power supply
E
Mains isolator
F
Premium tariff meter
G
Ripple control receiver (contact open: Power-OFF
enabled) with backup fuse
H
Economy tariff meter
K
Feed: TNC system
L
Compressor, heat pump stage 2 (type BWS 351.B)
Installation sequence
Power supply
(cont.)
5855006
Installation