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 11 of 32
Start Up & Operation
1. Follow all the procedures under “Before start-up”
before attempting operation of the compressor.
2. Switch on the electric source.
3. Verify the display screen is lit.
4. If an isolation valve is installed between the
compressor unit and the air receiver, make sure it is
open. Close the isolation valve between the air receiver
and the facility piping.
5. Pushing the ON button beside the touch screen
will allow the unit to start and operate automatically.
Pushing the OFF button will stop the motors, but the
HMI screen will remain active.
6. If the pressure does not rise, turn the unit o, the
unit is running backwards. Have a qualied electrician
switch the breaker OFF and exchange two out of the
three phases of electrical source. If pressure is rising,
allow the compressor unit to run. Each compressor
motor will automatically turn o as the pressure rises
and the maximum operating pressure is reached.
Pressure settings may be adjusted as described below.
Table 3: The sequence is an example of operation of SEO4007. SEH3007 operate 6 air
7. Open the isolation valve between the air receiver
and the facility piping. The compressor will start and
stop each pump as needed to maintain the pressure
between the high and low set points.
8. After a few hours and again after a few days,
check the display screen to see if the ALARM screen
has appeared. If a HIGH TEMPERATURE or MOTOR
OVERLOAD condition occurs, the alarm screen will
appear and the aected pump-motor will be taken out of
service. If the chosen settings are causing the motors to
start too frequently, the ALARM screen will appear and
the MOTOR WARNING indicator will illuminate. Motor
warning will not take the motor out of service, but the
user should take action to prevent motor overload and
damage. To reduce motor starting frequency, adjust
the set points to a wider range between High and Low
and possibly increase the dierential. If starting is still
too frequent, a larger or additional air receiver will be
needed.
Shut Down
1. Stop the compressor by pushing the OFF button.
NOTE: If the compressor rotates in reverse for more than
ve seconds, the check valve needs to be cleaned or replaced.
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