52
Do
not
remove jumpers
B
in the case of a 3/N/PE
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.
X3.7
X3.6
C
B
A
H
D
F
G
3
3
4
4
3
3/N
3/N
≈
4
K
kWh
kWh
5
3
(400 V~)
7 (230 V~)
X40
E
Fig. 52
Diagram excluding fuses and RCD
A
Heat pump control unit (indoor unit, luster termi-
nals: see chapter "Indoor unit: overview of connec-
tions")
B
Instantaneous heating water heater (if installed)
C
Heat pump compressor (outdoor unit)
D
Heat pump control unit power supply: see chapter
"Heat pump control unit power supply 230 V~"
E
Premium tariff meter
F
Ripple control receiver backup fuse
G
Ripple control receiver (contact open: power-OFF
enabled); feed: TNC system
H
Economy tariff meter
K
Feed: TNC system
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 54.
The compressor
and
instantaneous heating water
heater (if installed) are "forced" off when power-OFF is
enabled.
Note
Observe the technical connection conditions of the rel-
evant power supply utility.
Installation sequence
Power supply
(cont.)
5790 931 GB
Installation
