Powerex SE Series User Manual

Scroll Enclosure Air Compressor 15-60 HP
Operating & Maintenance Manual
Powerex • 150 Production Drive • Harrison, OH 45030 • USA
P 1.888.769.7979 • F 513.367.3125 • www.powerexinc.com
IN596202AV • 21 February 2023
Page 12 of 32
1. 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 o 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. quantity of air ends in accordance with
air consumption and energy-saving operation by
eliminating waste of electricity. Table 3 on page 11
shows the relationship between pressure and the
quantity of air ends operating for an SEO model.
The same concept is applied to 6 air ends for an
SEH.
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 o time rst. 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.
Operating Panel & Settings
The Scroll Enclosure Air Compressor is controlled
by a PLC programmed at the Powerex factory. The
operating status is displayed on the HMI– touch screen
panel on the front of the compressor unit. The touch
screen allows the user to select operating parameters
within predetermined limits set at the factory. The
touch screen also allows the user to change the display
to get more information about the operation of the
individual compressor modules and to take action
based on alarms and warnings. This enclosed scroll
system utilizes a PLC for alternation and will change
the pump sequence (Lead, Lag1, Lag2 etc) after every
start or after 10-minutes, which ever happens rst. The
HMI oers a MIN and MAX system setpoint and three
calculated pressure dierential settings. (Standard, Min
and Max).
The factory default sengs for HIGH and LOW Operang Pressures
Standard Pressure 90-116 PSIG
High Pressure 95-145 PSIG
Dierenal seng default is STANDARD
Table 4
High Operang
pressure
(cut out seng) limits
Low Operang pressure
(cut in seng) limits
Standard Pressure 60-116 PSIG 50-96 PSIG
High Pressure 95-145 PSIG 79-129 PSIG
Table 5
The control automatically di\idcs the range between
HIGH and LOW Operating Pressure into equal operating
intervals. The dierential for the operating intervals
may be adjusted by selecting STANDARD, MIN or MAX
on the set up screen.
In STANDARD, the dierential will be automatically set
to have a slight overlap between the individual pump
intervals. Each interval will be 135% of the possible
minimum value.
In MIN, the dierential will be automatically set to
divide the available range into equal intervals with no
overlap. The selection will result in the most frequent
starting of the electric motors for a given Operating
Pressure range.
NOTE: more frequent motor starting can lead to
reduced motor life. Exceeding 17 .5 starts per hour will
cause a warning display.

Powerex SE Series Specifications

General

Brand	Powerex
Model	SE Series
Category	Air Compressor
Language	English