47
Power supply with power-OFF
Power-OFF without on-site load disconnection (delivered condition)
The power-OFF signal is connected directly to the heat
pump control unit via floating contact. The compres-
sors are "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 (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
F
E
5
4
3
3
4
4
3
3/N
3/N
4
G
kWh
kWh
D
K
Fig. 29
Diagram excluding MCB/fuses and RCD
A
Heat pump control unit
B
Instantaneous heating water heater
C
Compressor
D
Heat pump control unit power supply
E
Premium tariff meter
F
Backup fuse, ripple control receiver
G
Ripple control receiver (contact open: power-OFF
enabled) TNC system feed
H
Economy tariff meter
K
Feed in: TNC system
Electronic soft starter, type SMC
Electronic soft starter functions:
■
Monitoring the compressor mains feed
■
Reducing the compressor starting current during the
starting procedure
Delivered condition:
■
Rotating field, phase asymmetry: 20 %
■
Max. operating current of "Imax" compressor:
dependent on compressor output
Overload protection
If the tolerance ranges of the electronic soft starter are
exceeded, the soft starter will automatically separate
the appliance from the mains.
Remove the cause if the relay has responded. The
relay does not need to be reset.
Starting characteristics
The starting characteristics are set at the DIP switches
behind the transparent protective flap of the electronic
soft starter. At the factory, the DIP switches are set to
suit the respective heat pump type.
Prior to commissioning, compare the DIP switch set-
tings with the details in the separate "Connection and
wiring diagram", and adjust if necessary.
Installation sequence
Power supply
(cont.)
5787 232 GB
Installation
Содержание BW 301.C090
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