Power Supply With Power-Off: With On-Site Load Disconnect - Viessmann VITOCAL 222-S Installation And Service Instructions Manual

Installation sequence
Power supply
(cont.)
X3.7
X3.6
X3.18/X2.1/X1.1
3
≈
3
kWh
3/N
4
Fig. 44 Diagram excluding MCB/fuses and RCD
Heat pump control unit (internal unit, luster termi-
A
nals, see chapter "Internal unit: Overview of con-
nections")
Instantaneous heating water heater
B
Heat pump compressor (external 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)
Feed: TN-C system
Economy tariff meter
H
Feed: TN-C system
K

Power supply with power-OFF: With on-site load disconnect

The power-OFF signal is connected to the on-site con-
tactor of the economy tariff power supply and to the
heat pump control unit. The compressor and instanta-
neous heating water heater are "forced" off when
power-OFF is enabled.
Note
Observe the technical connection conditions of the rel-
evant power supply utility.
44
5 (400 V~)
3
7 (230 V~)
3
kWh
3/N
4
4