Viessmann Vitocal 300-G Installation And Service Instructions Manual page 94

Installation sequence
Power supply
(cont.)
Shown excluding fuses and RCD.
A Control unit and accessories
B Instantaneous heating water hea-
ter
C Compressor
D Control unit power supply
Power supply 400 V~, various tariffs
Three separate supply cables.
Optional selective power-OFF for
compressor and instantaneous
heating water heater (see page 96
and 158).
94
E Heating system main isolator
F High tariff meter
G Ripple control receiver (contact
open: power-OFF enabled)
H Low tariff meter
K TNC system feed