Electric Connections - Quincy Compressor QOFT 20 Instruction Book

Instruction book
Note
4.3

Electric connections

Warning
Recommendations for fixed speed units
1. Always provide an isolating switch in the voltage supply line. Before starting any
maintenance, adjustments or repair, this switch must be opened to switch off the voltage to
the compressor.
2. Check that the motor cables and wires inside the electric cabinet are clamped tight to their
terminals.
3. Check the fuses and the settings of the circuit breakers. See section
4. Connect the power supply to terminals (L1, L2, L3) of terminal block (1X0). Connect the
earth conductor to connector (PE). Consult section
Service diagram
The Service diagram is supplied with the compressor and is shipped inside the electric cubicle.
The tables below list the typical components and their abbreviations as used in the diagrams:
Reference
B1
B2
M1
M2
M3
PDT02
PT 18
PT 29
PT45
TT11
TT18
TT21
TT29
TT45
TT11
9829 3199 74
All pipes must be connected stress-free to the compressor unit.
For more information concerning air nets, cooling systems, etc. refer to the compressor
installation manual.
To preserve the protection degree of the electric cubicle and to protect its components from
dust from the environment, it is mandatory to use a proper cable gland when connecting the
supply cable to the compressor.
Compressor
Electronic water drain, intercooler
Not used
Compressor motor
Fan motor (air-cooled units only)
Not used
Pressure transducer, Δp air filter
Pressure transducer, intercooler
Pressure transducer, delivery air
Pressure transducer oil
Temperature sensor element, LP outlet
Temperature sensor, HP inlet
Temperature sensor element, HP outlet
Temperature sensor, delivery air
Temperature sensor, oil
Temperature sensor element, LP outlet
Electrical
Electrical connections.
connections.
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