Legend and schematic wiring diagrams
The following schematic wiring diagrams show the electrical connection of a semi-hermetic reciprocating compressor with CM-RC-02 in all available motor designs. Various devices are available for oil monitoring, depending on the compressor design.
The terminal labels K2 and K1 on CN9 indicate the connections of the motor contactors K2 = Q03 and K1 = Q02. For star-delta start, the motor contactors are connected differently than for part winding start. Make connections according to the schematic wiring diagram!
Abbr. | Component |
|---|---|
B02 | Discharge gas temperature sensor |
B03 .. 08 | Temperature sensors in motor windings |
B10 | High pressure switch |
B11 | Low pressure switch |
B12 | Differential oil pressure switch |
B19 | Intermediate pressure gas temperature sensor |
B20 | Suction gas temperature sensor |
B21 | Optional temperature sensor |
B22 | Ambient temperature sensor |
B23 | Cold store temperature sensor |
B30 | Oil level switch |
B43 | Sensor of oil level controller |
B50 | High pressure transmitter |
B51 | Low pressure transmitter |
B57 | Optional pressure transmitter |
B60 | Overload protective device |
B58 | Intermediate pressure transmitter |
B61 | Overload protective device for second part winding |
E01 | Oil heater |
F01 | Main fuse |
F02 | Compressor fuse |
F03 | Control circuit fuse |
F04 | Fuse of compressor protection device or compressor module |
F05 | Fuse of oil heater |
F13 | Device-internal fuse |
K01 | Superior controller |
K03 | Compressor module |
K06 | Fan(s) control module |
K13 | Star-delta switching relay |
K18 | Auxiliary relay: FI outputs power voltage/rotating field for motor |
K19 | Auxiliary relay: safety chain enabled |
K21 | Extension board |
M01 | Compressor motor |
M02 | Additional fan |
M03 | Fan 1 |
M04 | Fan 2 |
M05 | SV for liquid injection with LI, RI or CIC injection valve |
M11 | SV for capacity regulator 1, CR1, CR+, CRII-2 or start unloading |
M12 | SV for capacity regulator 2, CR2, CR- or CRII-1 |
M13 | SV for capacity regulator 3, CR3 or CRII-3 |
M14 | SV for capacity regulator CR4 |
M20 | SV for liquid line |
M41 | SV for oil return |
M50 | Additional fan 2 |
M51 | Fan 3 |
M52 | Fan 4 |
P10 | Light: collective fault |
P20 | Light: system control is ready-to-operate |
P42 | Message: oil return is active |
Q01 | Main switch |
Q02 | Contactor for first part winding (PW) or main contactor (Y/Δ) or compressor contactor (DOL) |
Q03 | Contactor for second part winding (PW) or delta contactor (Y/Δ) |
Q04 | Star contactor (Y/Δ) |
Q05 | Control transformer fuse |
Q09 | Contactor for oil heater |
S01 | Control switch (on-off) |
S02 | Reset of compressor safety chain |
S11 | Door switch |
S12 | Switch for switching from EcoMode to LowSoundMode |
S15 | External signal for capacity control |
T01 | Control transformer (example for 230 V, required according to EN60204-1) |
T02 | Frequency inverter (FI) |
T07 | Power supply device for auxiliary voltage |
The cable colours are noted in accordance with IEC DIN60757.
