Compressor Power Supply 230 V; Connecting 400 V~ Instantaneous Heating Water Heater Power Supply; Connecting 230 V~ Instantaneous Heating Water Heater Power Supply; Power Supply With Power-Off: Without On-Site Load Disconnect - Viessmann VITOCAL 242-G Installation And Service Instructions Manual

Power supply
(cont.)

Compressor power supply 230 V~

L1
230 V / 50 Hz
N
1/N/PE
?
Fig. 26
MCB/fuse protection according to compressor out-
■
put: See "Specification".
■ Economy tariff and power-OFF can be applied

Connecting 400 V~ instantaneous heating water heater power supply

400 V / 50 Hz
3/N/PE
L3 L3
L2 L2
L1 L1
PE
PE
N3
N2
N N1
Fig. 27

Connecting 230 V~ instantaneous heating water heater power supply

230V / 50 Hz
1/N/PE
L1 L1
L1 L1
L1 L1
PE
PE
N N1
N1
N
N N1
Fig. 28

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.
L1
No parameters need to be set when using economy
■
N
tariff with power-OFF. The compressor is shut down
PE
during the power-OFF time.
■ Recommended power cable:
3 x 4 mm
Max. cable length: 25 m
■ Max. fuse rating 16 A: See "Specification".
■ Economy tariff and power-OFF can be applied
Recommended power cable:
■
5 x 2.5 mm
Max. cable length: 25 m
■ Max. fuse rating 16 A: See "Specification".
Economy tariff and power-OFF can be applied
■
Recommended power cable:
■
7 x 2.5 mm
Max. cable length: 25 m
Installation sequence
2
2
2
31