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 (158 ˚F). For testing the temperature sensor
the setting can be decreased to 50 ˚C (122 ˚F). Reset the value after testing.
The regulator does not accept illogical settings, e.g. if the warning level is programmed at
95 ˚C (203 ˚F), the minimum limit for the shut-down level changes to 96 ˚C (204 ˚F). The
recommended difference between the warning level and shut-down level is 10 ˚C (18 ˚F).
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.
Oil separator Use only Atlas Copco oil separators. The recommended maximum pressure drop over the
oil separator element is 1 bar (15 psi).
Minimum stop
time
Once the compressor has automatically stopped, it will remain stopped for the minimum
stop time, whatever happens with the net air pressure. Consult Atlas Copco if a setting
lower than 20 seconds is required.
Unloading/
Loading pressure
The regulator does not accept inconsistent settings, e.g. if the unloading pressure is
programmed at 7.0 bar(e) (101 psi(g)), the maximum limit for the loading pressure changes
to 6.9 bar(e) (100 psi(g)). The recommended minimum pressure difference between
loading and unloading is 0.6 bar (9 psi(g)).
Instruction book
112 2920 7090 51
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