1. WARNING!
Serious injury or death can result from loosening or opening components under pressure.
➤ The machine is charged with 0.5 bar gauge pressure.
➤ De-pressurise all pressurised components and enclosures.
2. A shut-off valve must be installed by the user in the connection line.
3. Make the compressed gas connection with an axial compensator or flexible pressure line.
4. Pressure relief valve with 6 bar blow-off pressure to be installed at customer site.
5. Receiver to be installed in the intake section at customer site.
The receiver accepts the venting volume without increasing inlet pressure to > 5 bar (a)
Further information The dimensional drawing in chapter 13.2 provides the size and position of the connection ports.
6.5 Connecting the power supply
Precondition The supply isolating device is switched off,
the device is locked off,
the absence of any voltage has been verified.
The voltage in the intermediate circuit capacitors of the frequency converter is reduced.
1. The power supply must only be connected by authorized installation personnel or an author‐
ized electrician.
2. Carry out safety measures as stipulated in relevant regulations and in national accident pre‐
vention regulations. In addition, observe the regulations of the local electricity supplier.
3. Test the overcurrent protection cut-out to ensure that the time it takes to disconnect in re‐
sponse to a fault is within the permitted limit.
4. Select supply cable conductor diameters and fusing in accordance with local regulations.
5. The user must provide the machine with a lockable power supply disconnecting device.
This could be, for example, a load disconnect switch with fused input. If a circuit breaker is
used it must be suitable for the motor starting characteristics.
6. Check that the tappings on the control voltage transformer are connected according to the sup‐
ply voltage.
If not, change the tappings to suit the power supply voltage.
7. If applicable:
Check that the tappings on the control voltage transformer in the frequency converter cabinet
are connected according to the supply voltage.
If not, change the tappings to suit the power supply voltage.
8. DANGER!
Danger of fatal injury from electric shock!
➤ Switch off and lock out the power supply disconnecting device and verify the absence of
voltage.
9. Connect the machine to the power supply.
10. Ensure that the cabinet again complies with the requirements of degree of protection IP54.
Further information Further specifications for electrical connections are to be found in the electrical diagram in chap‐
ter 13.3 and in the frequency converter operating instructions.
6 Installation
6.5 Connecting the power supply
ESD_2C_10357405_10–LIN_00 E
Service Manual Screw Compressor
ESD 442/14 bar (abs) SFC SIGMA CONTROL 2
39
To Next Page
Loading...
