Viessmann Vitocal 300-G Installation And Service Instructions Manual page 93

Power supply
(cont.)
Shown excluding fuses and RCD.
A Compressor
B Instantaneous heating water hea-
ter
C Control unit and accessories
Power supply with power-OFF (with on-site load disconnect-
ing switch)
Connection of the power-OFF signal to on-site contactor of the low tariff power
supply and in the control unit (recognition on the software side); mechanical
compressor and instantaneous heating water heater shutdown. Observe the
technical connection conditions of the relevant power supply utility.
Installation sequence
D Ripple control receiver (contact
open: power-OFF enabled)
E Backup fuse ripple control recei-
ver
F High tariff meter
G TNC system feed
H Low tariff meter
93