38
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. 38
Diagram excluding MCB/fuses and RCD
A
Heat pump control unit (internal unit, luster termi-
nals, see chapter "Internal unit: Overview of con-
nections")
B
Instantaneous heating water heater (if installed)
C
Heat pump compressor (external 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: TN-C system
H
Economy tariff meter
K
Feed: TN-C system
Power supply with power-OFF: With on-site load disconnect
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 39.
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.)
5700 542 GB
Installation
