Atlas Copco GA90 (W) VSD

31
2920 1190 05
Instruction book Industrial Air Division
7 Principal data
7.1 Readings on display (4-Fig. 7a) 1)
Ref.: Air outlet pressure
Reading: Depends on the setpoint (desired net pressure)
Shown: On main display (Fig. 7b), when:
- switching on voltage
- selecting main display with function keys (5)
below Menu and Main
- keys of module are not used for four minutes
Sensor: PT20-Figs. 2
Ref.: Compressor element outlet temperature
Reading: Approx. 60°C/108°F above cooling air
temperature (cooling water temperature on water-
cooled compressors)
Shown: When using the function key (5) below More on
the main display (Fig. 7b)
Sensor: TT11-Fig. 9b
Ref.: Cooling water outlet temperature (water
cooled compressors)
Reading: Below 50°C
Shown: When using the function key (5) below More on
the main display (Fig. 7b)
Sensor: TT51-Figs. 6
7.2 Settings of safety valve
GA50 (W) VSD 14.5 bar(e)
GA90 (W) VSD 14.5 bar(e)
7.3 Settings of circuit breakers
7.3.1 GA50 (W) VSD
Circuit breaker Supply Fre- Maximum
voltage quency setting
Fan motor (Q15-Fig. 8a) . 400 V 50 Hz 4.2 A
7.3.2 GA90 (W) VSD
Circuit breaker Supply Fre- Maximum
voltage quency setting
Fan motor (Q15-Fig. 8b)
- Air-cooled compressors . 400 V 50 Hz 10 A
- Water-cooled
compressors. . . . . . . . . . . 400 V 50 Hz 1.2 A
Invertor (Q16-Fig. 8b) . . . . 400 V 50 Hz Minimum
setting of
circuit
breaker
7.4 Compressor specifications
7.4.1 Reference conditions
Air inlet pressure (absolute) . . . . . . . . . . . . . bar 1
Air inlet temperature . . . . . . . . . . . . . . . . . . °C 20
Relative humidity . . . . . . . . . . . . . . . . . . . . . % 0
For water-cooled compressors also:
Cooling water inlet temperature . . . . . . . . . . °C 20
1) See "User manual for Elektronikon regulator for GA90 VSD
compressors", sections "Modify settings submenu" and "More
function"