Compressor Power Supply (400 V~); Power Supply With Power-Off: Without On-Site Load Disconnect - Viessmann Vitocal 300-G Series Installation And Service Instructions Manual

Power supply
(cont.)

Compressor power supply (400 V~)

?
N
3/N/PE
L3
400 V/50 Hz
L2
L1
Fig. 23
Type
BW 301.A21
■ ■
BWS
■
301.A29
■
301.A45
■

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

The power-OFF signal is connected directly to the heat
pump control unit. When power-OFF is enabled, the
compressor is "forced" off; in the 2-stage version (type
BW + BWS), both compressors are switched off.
Parameter "Output for instant. heating water heater
at power-OFF 790A" determines whether and at what
stage an instantaneous heating water heater (if instal-
led) remains operational during power-OFF.
PE
N
L3
L2
L1
Recommended power cable
Cable
4 x 2.5 mm
4 x 4.0 mm
4 x 6.0 mm
Economy tariff and power-OFF can be applied.
■
No parameters need to be set when using economy
■
tariffs with power-OFF facility. The compressor is
shut down during the power-OFF time.
Max. cable length
2 50 m C16A, 3-pole
2 50 m C25A, 3-pole
40 m C40A, 3-pole
2
"Vitotronic 200 heat pump control unit" service
instructions
Note
Observe the technical connection conditions of the rel-
evant power supply utility.
Installation sequence
Fuse protection
35