KAESER CSD 75, Руководство по обслуживанию, Страница: 21 / 81

Construction and Operation
5 --- 16
5.5 DUAL Control
p
max
p
min
Full load
Standstill
Mo
to
r
p
o
w
e
r
P
re
ssu
re
Time
t1 t2
1 2 3 4 5
Idle
In DUAL Control (combined idle and start ---stop) the compressor normally runs at full --
load, idle or standstill.
The controller regulates the compressor package between full -- load and idle.
If the compressor package runs in idle for longer than the preset period (1) to (2), for
example t
1
= 6 min, the drive motor is stopped completely (2). When the lower switching
point p
min
(3) is reached the compressor package is automatically started again. Pressure
rises to the upper switching point p
max
(4), and the compressor package switches to idle. If
the pressure falls again to, for example, p
min
(5) within a shorter period (4) to (5), then the
compressor is automatically switched from idle to full---load.