Viessmann Vitocal 222-S Installation And Service Instructions For Contractors page 55

Power supply
(cont.)
X3.7
A
X3.6
X40
3
D
L
≈
3
kWh
3/N E G
F
4
K
Fig. 53 Diagram excluding fuses and RCD
Heat pump control unit (indoor unit, luster termi-
A
nals: See chapter "Indoor unit: Overview of con-
nections")
Instantaneous heating water heater (if installed)
B
Heat pump compressor (outdoor unit)
C
Heat pump control unit power supply: See chapter
D
"Heat pump control unit power supply 230 V~"
Premium tariff meter
E
Ripple control receiver backup fuse
F
Ripple control receiver (contact open: Power-OFF
G
enabled) with backup fuse
Economy tariff meter
H
Feed: TNC system
K
Mains isolator
L
C
B
5 (400 V~)
(230 V~)
7
3
kWh
3/N
H
4
4
3
Installation sequence
55