BOGE FOCUS compressor control for piston compressors
Page 5
FOCUS
1.2
Operation
Run-up phase
The compressor motor is started and run up as already described under
„ Ready“, page 4 The status display changes from
Ready
to
Run-up
.
To be able to do so, the system pressure* at the compressor must be de-
creased and the motor spinning time finished.
For the star / delta contactor combination applies: First the star contactor and
20 ms later the mains contactor is switched on. The display
Run-up
signals the
corresponding status of the control.
* If a system pressure sensor is present – the sensor input is optionally used for suction pressure
monitoring.
Load operation
The Run-up resp. Star phase is finished after termination of the run-up time.
The control activates the transport valve.
Compressors which are controlled accordingly now change into the delta
switching and the display shows load.
Idling
By setting a follow-up time – preset to 0 seconds – and / or exceeding of the
maximum permissible motor switching operations, suitable compressor types
may go through an idling phase after completion of a load run phase.
Otherwise, the control switches off the motor at once – and the compressor
switches back to
Ready
state.
If the net pressure drops below the set minimum pressure (
p
min
), the compres-
sor control may automatically change from
idling
to
load operation
– the com-
pressor continues with the output.
* Multi-stage compressors (determined by P=41) are not capable of running idle due to delayed
valve control, so that a sufficiently large receiver/net volume and sufficiently large interval between
the upper and the lower pressure target value are required for motor switching operation limitation!
Switch off the
compressor
With the
OFF key
or via Remote-Off the compressor is switched off. The
pressure control is deactivated. Immediately,
Off
is displayed in the compres-
sor status display and the green LED goes out.
Maintenance
When operating the control the battery voltage has to be checked from time to
time. If the voltage drops too far a warning message is created. In this case
the battery has to be replaced.
The display of the TAN has to be cleaned with a damped yet not wet cloth from
time to time. As detergents customary household detergents for greasy sur-
faces can be used. No further maintenance is required for the control.
