52
Power supply with power-OFF without on-site load disconnect (delivered condition)
The power-OFF signal is connected directly potential-
free to the heat pump control unit. The compressors
are shut down when power-OFF is enabled.
Note
Observe the technical connection requirements of the
relevant power supply utility.
Mains monitoring
Electronic soft starter, type SMC
Electronic soft starter functions:
■
Monitoring the compressor mains feed
■
Reducing the compressor starting current during the
starting procedure
■
Overload protection
Delivered condition:
■
Rotating field, phase asymmetry: 20 %
■
Max. compressor operating current "Imax": Depend-
ent on compressor output
SMC-3
Fig. 35
A
DIP switch for starting characteristics
B
Rotary switch for max. compressor operating cur-
rent "Imax"
C
Status LED
Status LED explanation
■
Status LED illuminates:
Mains monitoring active
■
Status LED flashes: Fault
Number of consecutive flashes:
1 Overload
2 Excess temperature
3 Phase reversal
4 Phase loss/motor not connected
5 Phase asymmetry
6 Short-circuited thyristor
7 Test
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.
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.
Installation sequence
Power supply
(cont.)
5855865
Installation
Summary of Contents for BW 352.B027
Page 83: ...83 5855865...
