Heat Pump Control Unit Power Supply 230 V - Viessmann Vitocal 300-A Series Installation And Service Instructions For Contractors

Installation sequence
Power supply
(cont.)

Heat pump control unit power supply 230 V~

A
max.16 A
X3.18 L1
1/N/PE
X2.1 N
230 V/50 Hz
X1.1
?
Fig. 32
A Mains terminals inside the heat pump control unit
Note
This supply must never be blocked.
Compressor power supply 400 V~
400 V~
A
1.
Fig. 33
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.
40
Max. fuse rating 16 A
■
Standard tariff: No economy tariff with power-OFF
■
possible for the heat pump control unit
■ Recommended power cable:
3 x 1.5 mm
Recommended power cable with power-OFF for
■
compressor/instantaneous heating water heater:
5 x 1.5 mm
400 V/50 Hz
Fig. 34
■ 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.
■
Recommended power cable: 5 x 2.5 mm
B
Max. cable length: 25 m
2.
3.
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.
2
2
?
N
3/N/PE
L3
L2
L1
PE
N
L3
L2
L1
2