Quincy Compressor QOFT 20, Instruction Book

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Instruction book
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Note
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.
4.3 Electric connections
Warning
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.
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 Electrical connections .
4. Connect the power supply to terminals (L1, L2, L3) of terminal block (1X0). Connect the
earth conductor to connector (PE). Consult section Electrical connections .
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 Compressor
B1 Electronic water drain, intercooler
B2 Not used
M1 Compressor motor
M2 Fan motor (air-cooled units only)
M3 Not used
PDT02 Pressure transducer, Δp air filter
PT 18 Pressure transducer, intercooler
PT 29 Pressure transducer, delivery air
PT45 Pressure transducer oil
TT11 Temperature sensor element, LP outlet
TT18 Temperature sensor, HP inlet
TT21 Temperature sensor element, HP outlet
TT29 Temperature sensor, delivery air
TT45 Temperature sensor, oil
TT11 Temperature sensor element, LP outlet