Electrical installation of compressor and frequency inverter

This chapter covers some important aspects to be considered when installing and commissioning an external frequency inverter.

For further information, see also ASERCOM Guidelines "Recommendations for using frequency inverters with positive displacement refrigerant compressors", chapter 6.

State of delivery of compressor:

The compressor is filled with a holding charge: Overpressure 0.5 .. 1 bar nitrogen.
caution

The compressor is filled with a holding charge: Overpressure 0.5 .. 1 bar nitrogen.

Risk of injury to skin and eyes.

Depressurise the compressor!

Wear safety goggles!

For work on the electrical system:

Risk of electric shock!
warning

Risk of electric shock!

Before working on the terminal box, module housing and electrical lines: Switch off the main switch and secure it against being switched on again!

Close the terminal box and the module housing before switching on again!

The compressor module may be damaged or fail!

The compressor module may be damaged or fail!

Never apply any voltage to the terminals of CN7 to CN12 – not even for test purposes!

The voltage applied to the terminals of CN13 must not exceed 10 V!

The voltage applied to terminal 3 of CN14 must not exceed 24 V! Do no apply voltage to the other terminals!

For work on the frequency inverter (FI):

Wrong or insufficient earthing may result in life-threatening electric shocks upon contact with the frequency inverter!
danger

Wrong or insufficient earthing may result in life-threatening electric shocks upon contact with the frequency inverter!

Earth the complete frequency inverter permanently and check the earth contacts at regular intervals!

Prior to any intervention in the device, check all voltage connections for proper insulation.

Operating the frequency inverter at high temperatures leads to stress and reduced lifetime!

Operating the frequency inverter at high temperatures leads to stress and reduced lifetime!

Take into account the maximum ambient temperatures at the place of installation.

Observe the minimum clearances for ventilation.