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Power supply
(cont.)
Do not remove jumpers
B
400 V/50 Hz power supply.
■
Recommended power cable:
5 x 2.5 mm
2
Max. fuse rating 16 A
■
Economy tariff and power-OFF can be applied
■
Power supply with power-OFF: Without on-site load disconnection
The power-OFF signal is connected directly to the heat
pump control unit; with heat pump cascades the con-
nection is only made at the lead heat pump.
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.
Note
Observe the technical connection conditions of the rel-
evant power supply utility.
Power supply with power-OFF: With on-site load disconnection
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 53.
The compressor and instantaneous heating water
heater (if installed) are "forced" off when power-OFF is
active.
Note
Observe the technical connection conditions of the rel-
evant power supply utility.
in the case of a 3/N/PE
X3.7
A
X3.6
X40
3
D
≈
3
kWh
E
G
3/N
F
4
K
Fig. 47
Diagram excluding fuses and RCD
Heat pump control unit (indoor unit, luster termi-
A
nals: See chapter "Indoor unit: Overview of con-
nections")
Instantaneous heating water heater (if installed)
B
Heat pump compressor (outdoor 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: TNC system
Economy tariff meter
H
Feed: TNC system
K
Installation sequence
B
C
(400 V~)
5
3
7 (230 V~)
3
kWh
3/N
H
4
4
51
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