Operations 6
October 2013 GB 41 /80
The compressor starts automatically if the external
start request approval has been granted (which
must be granted via a corresponding, programma-
ble input).
6.4 Operations
Variable speed (RS)
The controller regulates the drive motor speed
to that it exactly matches the compressed air de-
mand.
In the minimum permissible speed is reached,
On-/Off-load control takes place.
On-/Off-load control
The required compressed air quantity is controlled
by switching the suction regulator or blow-off valve
on and off (On-/Off-load control).
6.5 Operating Modes
The controller has two operating modes:
•
Automatic operation
•
Continuous operation
Automatic operation
In automatic operation, the drive motor starts and
stops automatically dependent on the Pressure de-
mand.
Once the line pressure reaches the upper pres-
sure value, the controller switches the compressor
off-load and starts the run on time.
If no Pressure demand exists by the end of the
run-on time, the controller stops the compressor
and changes to standby mode.
If the line pressure reaches the lower pressure
value (Pressure demand), the controller restarts
the compressor.
Continuous operation
In continuous operation, the drive motor runs con-
tinuously, i.e. if the compressor switches off-load,
no run-on time starts and the drive motor is not
switched off.
Changing operating mode
Ex works the compressor is set to Automatic op-
eration as standard.
To change the operating mode:
1
Tap the <Settings> tab.
2
Tap the <Control...> button.
3
Tap the <Operating mode> button.
–
The input menu "Operating mode" opens.
4
Tap the <Continuous operation> button.
The <Cancel> button can be used to cancel
changing of the operating mode. The previ-
ously active setting is used.
5
Tap the <OK> button.
✓
The operating mode is changed to Continuous
operation.
–
The "Control" menu appears.
–
On the <Operating mode> button the text
changes to "Continuous operation".
The button <Automatic operation> in the "Oper-
ating mode" can be used to change the operating
mode back to Automatic operation.
6.6 Water circuit control
The water level in the pressure tank is measured
by a level sensor. The water treatment unit makes
water available for topping up.
Automatic Level Control
The water quantity can increase or decrease dur-
ing operation (water addition due to condensate at
high atmospheric humidity, water removal due to
dry intake air).
The changes in water level are automatically cor-
rected by the level control during operation. There-
fore, the water treatment unit does not supply wa-
ter (only in on-load operation) or remove excess
water (only with running motor).
Cyclical water change
To ensure uniform water quality, a so-called wa-
ter change takes place at fixed time intervals (set-
ting Replacement cycle). The remaining time (Re-
placement remaining) is indicated alongside the
symbol Water change. Once the Replacement re-
maining time has elapsed, the water change cy-
cle takes place. This cycle consists of a discharge
stage (only in on-load mode), followed by an in-
take stage (only in on-load mode).
If the water change cycle is interrupted by an off-
load stage or machine standstill, the cycle will be
resumed in the next on-load stage. Once the cycle
is completed, the remaining time Replacement re-
maining) is reset again (setting Replacement cy-
cle).
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