Product Manual
compressor will automatically restart and then the blow-off valve will be closed, when the net
pressure drops to the minimum limit set in the controller.
G 5 up to G 7
The main components of the regulating system are:
• Unloader (UA), including inlet valve (IV) and non-return valve (NRV).
• Loading solenoid valve (Y1), normally open.
• Pressure signal (PS) from the instrument block.
• The Elektronikon™ Base controller that regulates the compressor based on the pressure
settings and readings of the pressure sensor.
Loading
If the working pressure is below the preset maximum, the solenoid valve (Y1) is energized and
therefore closed. There is no signal air flow into unloader allowing the inlet valve to open due to
the element suction.
The inlet valve opens completely allowing the air through the air filter (AF) and the compressor
will run fully loaded (100% output).
The unit stops loading when the set ‘Unload’ pressure is reached, the machine will run unloaded.
Unloading
When the working pressure reaches the unload pressure, solenoid valve (Y1) is de-energized
and therefore open. The signal air flow goes directly through the non-return valve (NRV) into the
unloader (UA), keeping the inlet valve closed. The compressor will run unloaded (0% output) and
the pressure is discharged into the air filter (AF).
The compressors are equipped with the Elektronikon™ Base controller, an intelligent controller
that will stop the compressor after a variable period of unloaded operation using the following
control algorithm:
• At power on, in the first work cycle, the ‘Unload’ period is 30 seconds.
• If the compressor is stopped manually, it stops after 30 seconds of unloaded operation.
• After the first work cycle, and in all other working cycles, the ‘Unload’ period is calculated
following 3 main rules:
a. The compressor cannot go over the number of hourly activations. Given a maximum
number of 10 restarts per hour (factory setting), the total running period per cycle
(‘Load’ time + ‘Unload’ time) must be minimum 6 minutes (360s).
Instruction book
2920 7199 10 21