Schematic Wiring Diagrams Semi-Hermetic Screw Compressors - Bitzer VARIPACK FD+6 Instructions De Service

5.7.2 Schematic wiring diagrams semi-hermetic
screw compressors
Abbr Component
.
B1 Oil thermostat
B2 Superior controller
B6 High-pressure transmitter
B7 Low-pressure transmitter
F1 Main fuse
F2 Compressor fuse
F3 Control circuit fuse
F4 Oil heater fuse
F5 High-pressure switch
F6 Low-pressure cut-out
F7 Oil flow switch
F9 Monitoring of oil stop valve
F10 Oil filter monitoring
F12 ECO control unit; pressure switch (ECO)
(ATEX)
F17 Control transformer fuse
F21 Fuse of the heating element in the terminal
box
H1 Light "motor failure"
H4 Light "oil level fault"
H5 Light "oil stop valve fault"
H11 Light "ready-to-operate"
K4 Auxiliary contactor
K10 Auxiliary relay "Compressor start"
K11 Auxiliary relay "Compressor release"
K4T Time relay "Oil level monitoring 120 s"
M1 Compressor motor
N1 Frequency inverter (FI)
Q1 Main switch
R1 Oil heater
R2 Discharge gas temperature sensor
R9 Heating element for terminal box
R10 Optional temperature sensor
R11 Auxiliary resistor
S1 Control switch (on/off)
S2 Fault reset "motor & discharge gas temp., mo-
tor rotating direction, oil flow" with HS.85:
Fault reset "motor & discharge gas temp., mo-
tor rotating direction, oil supply"
S4 Reset "oil filter chamber" (HS.85)
CB-100-2
Abbr Component
.
T1 Control transformer (example for 230 V, re-
quired according to EN60204-1)
Y1 Solenoid valve "oil injection"
Y2 Solenoid valve "liquid line"
Y3 Solenoid valve "Standstill bypass"
Y4 Solenoid valve "capacity regulator CR1"
Y5 Solenoid valve "capacity regulator CR2"
Y6 Solenoid valve "capacity regulator CR3"
Y7 Solenoid valve "capacity regulator CR4"
Y8 Solenoid valve "ECO" (if required)
Tab. 6: Legend schematic wiring diagrams HS compressors with
VARIPACK
SE-B*: Motor protection device (optional)
OLC-D1: Oil monitoring
SE-i1: Protection and monitoring device
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