Compressor Power Supply 400 V; Power Supply With Power-Off: Without On-Site Load Disconnect - Viessmann Vitocal 300-A Installation And Service Instructions Manual

Installation sequence
Power supply
(cont.)

Compressor power supply 400 V~

400 V~
A
1.
Fig. 35
Mains terminals, compressor 3/N/PE 400 V/50 Hz
A
Power cable 3/N/PE 400 V/50 Hz (on site)
B

Power supply with power-OFF: without on-site load disconnect

The power-OFF signal is connected directly to the heat
pump control unit. The compressor is "forced" off when
power-OFF is enabled.
Parameter "Output for instant. heating water heater
at power-OFF 790A" determines whether and at what
stage an instantaneous heating water heater remains
operational during the power-OFF period.
Note
Observe the technical connection conditions of the rel-
evant power supply utility.
42
400 V/50 Hz
Fig. 36
■ Fuse protection in accordance with the compressor
rating: see "Specification".
Economy tariff and power-OFF can be applied
■
No parameters need to be set when using economy
■
tariff with power-OFF. The compressor is shut down
during the power-OFF time.
B
■
Recommended power cable: 5 x 2.5 mm
2.
Max. cable length: 25 m
3.
?
N
3/N/PE
L3
L2
L1
PE
N
L3
L2
L1
2