Term Explanation
Compressor
element 1/2
Element 1 stands for the low-pressure compressor element; element 2 stands for the high-
pressure compressor element.
The regulator does not accept illogical settings, e.g. if the warning level is programmed at
401 ˚F, the minimum limit for the shut-down level changes into 402 ˚F. The recommended
difference between the warning level and shut-down level is 18 ˚F.
Required stop
period/Minimum
stop time
Once the compressor is automatically stopped, it will remain stopped for the minimum stop
time (approx. 20 seconds), whatever happens with the air net pressure. In automatic
operation, the compressor will not be stopped by the regulator until a standstill period of
at least the sum of the minimum stop time and required stop period is expected. However,
if the decrease in air net pressure should require a new start of the compressor, the
regulator will start the compressor after the minimum stop time.
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.
Unloading/
Loading pressure
The regulator does not accept illogical settings, e.g. if the unloading pressure is
programmed at 7.0 bar(e), the maximum limit for the loading pressure changes into 6.9
bar(e). The recommended minimum pressure difference between loading and unloading
is 0.6 bar.
Unloading/
Loading pressure
The regulator does not accept illogical settings, e.g. if the unloading pressure is
programmed at 101 psig, the maximum limit for the loading pressure changes into 100
psig. The recommended minimum pressure difference between loading and unloading is
9 psig.
Delay at shut-
down signal
Is the period during which the signal must exist before the compressor is shut down. If it
should be required to program this setting at another value, consult Atlas Copco.
Instruction book
72
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