Powerex SE Serie Mode D'emploi page 9

10HP - 20HP Scroll Enclosure Air Compressors
OPERATION Cont'd
SHUT-DOWN
1. Stop the compressor by pushing the OFF button.
NOTE: If the compressor rotates in reverse for more than
five seconds, the check valve needs to be cleaned or replaced.
2. Switch the breaker OFF if the compressor is not to be used
for a long period of time.
STOPPING THE COMPRESSOR DURING
EMERGENCY OPERATION
Stop the compressor by pushing the OFF button or by turning
the power off at the main disconnect panel.
MULTI-STAGE CONTROL
As this compressor uses plural air ends, it employs
multi-stage control. It can start and stop each air end
according to pressure and air consumption, automatically
select the number of air ends in accordance with air
consumption and achieve optimum and uniform operation at
all times as well as energy-saving and labor-saving operation.
1. Multi-stage control - Among air ends which are operating
under group control, it stops the air end which has been
operating for a longer time and restarts the air end whose
operating time has been shorter, thus resulting in equalization
of operating time of each air end and operation with a min.
The sequence is an
example of operation
of SEQ2007.
SET1507 operate 3 air
ends, SED1007
operate 2 air ends.
quantity of air ends in accordance with air consumption and
energy-saving operation by eliminating waste of electricity.
The chart below shows the relationship between pressure and
the quantity of air ends operating for an SEQ model. The
same concept is applied to 3 air ends for an SET and 2 for an
SED. 2. Automatic Alteration: When air demand allows one
or more air ends to remain idle, the control will automatically
shift operation to equalize usage after 10 minutes. If air
demand increases and pressure drops, the control will
energize additional air ends as needed, starting the one with
the longest off time first. The control will also de-energize air
ends as pressure rises.
3. The control allows the user to adjust the pressure settings.
To minimize power consumption, the user should select the
lowest maximum pressure that is suitable for the operations
being performed. The smallest gap between minimum and
maximum pressure that avoids too frequent motor starting
should also be selected.
4. The control will automatically prevent multiple motors
from starting simultaneously by inserting a three second
delay.
Pg 9