Atlas Copco GA90

69
Instruction book
9096 3313 00
Parameters
Minimum
setting
Factory
setting
Maximum
setting
Motor running time in star sec 5 10 10
Load delay time (star-delta) sec 0 0 10
Number of motor starts starts/day 0 240 240
Minimum stop time sec 10 20 30
Programmed stop time sec 0 3 20
Power recovery time (ARAVF) sec 10 10 3600
Restart delay sec 0 0 1200
Communication time-out sec 10 30 60
Protections
Minimum
setting
Factory
setting
Maximum
setting
Compressor element outlet temperature
(shut-down warning level)
°C 50 110 119
Compressor element outlet temperature
(shut-down level)
°C 111 120 120
For water-cooled compressors also:
Minimum
setting
Factory
setting
Maximum
setting
Cooling water inlet temperature (warning
level)
°C 0 50 99
Cooling water outlet temperature (warning
level)
°C 0 60 99
Service plan
The built-in service timers will give a Service warning message after their respective preprogrammed time
interval has elapsed.
Also see sectionPreventive maintenance schedule.
Consult Atlas Copco if a timer setting has to be changed. The intervals must not exceed the nominal
intervals and must coincide logically. See section Modifying general settings.
Terminology
Term Explanation
ARAVF Automatic Restart After Voltage Failure. See section Elektronikon regulator.
Power recovery
time
Is the period within which the voltage must be restored to have an automatic restart. Is
accessible if the automatic restart is activated. To activate the automatic restart
function, consult Atlas Copco.
Restart delay
This parameter allows to programme that not all compressors are restarted at the same
time after a power failure (ARAVF active).
Compressor
element outlet
The recommended minimum setting is 70 °C. For testing the temperature sensor the
setting can be decreased to 50 °C. Reset the value after testing. The regulator does not
accept illogical settings, e.g. if the warning level is programmed at 95 °C, the minimum
limit for the shut-down level changes to 96 °C. The recommended difference between
the warning level and shut-down level is 10 °C.
Delay at shut-
down signal
Is the time for which the signal must exist before the compressor is shut down. If it is
required to program this setting to another value, consult Atlas Copco.