Viessmann Vitocal 300-G Installation And Service Instructions Manual page 100

Installation sequence
Power supply
(cont.)
A Heat pump control unit (connection
on cross connect PCB)
B Instantaneous heating water heater
(on site)
C Compressor
D Control unit power supply
E Mains isolator
Two-stage (type BW 301.A + BWS 301.A)
X3.7
A
X3.6
3
D
E
≈
3
kWh
3/N F
G
4
Shown excluding fuses and RCD.
A Heat pump control unit (connection
on cross connect PCB)
B Instantaneous heating water heater
(on site)
C Compressor, heat pump stage 1
(type BW 301.A)
100
F High tariff meter
G Ripple control receiver (contact
open: power-OFF enabled) with
backup fuse
H Economy tariff meter
K TNC system feed
C
B
5
3
kWh
3/N
H
4
4
K
D Control unit power supply
E Mains isolator
F High tariff meter
G Ripple control receiver (contact
open: power-OFF enabled) with
backup fuse
L
4 4