Viessmann VITOCAL 300-G Installation And Service Instructions Manual page 109

Power supply
(cont.)
Note
Observe the technical connection condi-
tions of the relevant power supply util-
ity.
Single stage (type BW)
X3.7
A
X3.6
3
3
kWh
3/N
D
4
Diagram excluding fuses and RCD.
A Heat pump control unit (for connec-
tion on cross connect PCB, see
page 225)
B Instantaneous heating water heater
(on site)
C Heat pump compressor (type BW)
≈
E
F
4
G
Installation sequence
B C
5
3
kWh
3/N
H
4
D High tariff meter
E Ripple control receiver (contact
open: power-OFF enabled)
F Backup fuse ripple control receiver
G TNC system feed
H Low tariff meter
4
109