Power Supply With Power-Off: With On-Site Load Disconnect - Viessmann Vitocal 200-S Installation And Service Instructions Manual

Installation sequence
Power supply
(cont.)
X3.7
A
X3.6
X40
3
D
≈
3
kWh
E G
3/N
F
4
K
Fig. 38 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 (if installed)
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.
With heat pump cascades, the power-OFF signal must
be connected to all heat pumps in parallel and in the
same phase. An additional contactor relay is required
for this: See page 39.
The compressor and instantaneous heating water
heater (if installed) are "forced" off when power-OFF is
enabled.
Note
Observe the technical connection conditions of the rel-
evant power supply utility.
38
B C
(400 V~)
5
3
7 (230 V~)
3
kWh
3/N
H
4
4