Bitzer VARIPACK FDU+12, Руководство по эксплуатации

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CB-100-1 55
Schematic wiring diagram
Connect the VARIPACK frequency inverter in accord-
ance with the schematic wiring diagrams. Mount the
control switches S1 to S3 in the switch cabinet.
Individual connection of the compressor motor accord-
ing to the selected motor version and design. For de-
tails concerning the motor connection, see inside the
terminal box of the compressor.
The schematic wiring diagrams include an optional oil
monitoring. Without such a monitoring, the Delta-PII re-
spect. OLC-K1 and the components S3 and H2 can be
omitted. The auxiliary relay K11 and the pressure
switches F5 and F6 should in this case be installed in
path 15 at the connection 14 of the SE-B1.
In contrast to the safety levels obtained by VARIPACK
frequency inverters (PLe, SIL3), the integration in the
system shown in the schematic wiring diagrams corres-
ponds to a max. safety level of (PLd, SIL2). The actual
safety levels valid for the entire system can exclusively
be calculated by the system manufacturer! The obtain-
able safety level shown in the schematic wiring dia-
grams is usually satisfactory for refrigeration systems.
For comparison: a simple contactor circuit that is usu-
ally used, without using two contactors with mutual
monitoring connected in series, corresponds to a max.
reachable safety level of PLc/SIL2. The required safety
level must be defined by the system manufacturer on
the basis of a risk assessment. For further information,
see chapter Safe Torque Off (STO), page 60.
Abbr. Component
B1 Control unit (cooling demand) or com-
mand for compressor start (release sig-
nal from the system controller) or con-
troller On/Off
F1 Main fuse
F2 Compressor fuse
F3 Control fuse
F12 Oil heater fuse
F17 Control transformer fuse
H1 Signal lamp "over temperature" (motor
and discharge gas)
H2 Signal lamp "Oil supply fault"
H6 Signal lamp "Ready-to-operate"
K10 Auxiliary relay "Compressor is running"
K11 Auxiliary relay "Compressor release"
M1 Compressor
N1 VARIPACK frequency inverter (FI)
Q1 Main switch
R1 .. 6 PTC sensor in the motor winding
Abbr. Component
R7 Discharge gas temperature sensor (op-
tion)
R8 Oil heater (option)
S1 Control switch (on/off)
S2 Fault reset "over temperature" (motor
and discharge gas)
S3 Fault reset "Oil supply fault"
T1 Control transformer (for example 230 V)
Y2 Solenoid valve "Liquid line"
Tab. 4: Legend for the schematic wiring diagrams VARIPACK
SE-B1: Protection device.
Delta PII or OLC-K1: Oil monitoring (option).