WhisperAir™ Oil-free Rotary Tooth Compressor
Model Series PCC & PCCMD – 50 HP
Powerex • 150 Production Drive • Harrison, OH 45030 • USA
(T) 1.888.769.7979 • (F) 513.367.3125 • www.powerexinc.com
IN594501AV • 02/2016
Page 17 of 32
Starting
1.
Switch the power supply on. Check that the touch
panel is illuminated.
2.
Push “ON” on the switch and select “STATUS” on
the touch panel. As the compressor starts running,
the operation indicator lights up. The compressor
switches from Star operation to Delta operation 10
seconds after the start-up. Two seconds after Delta
operation, the compressor switches to loaded
operation.
During Operation
1.
Regularly check the status of the compressor by
touching “STATUS” on the touch panel. Refer to
the controls section for more information.
2.
The touch panel will provide warnings or shut
down the unit if necessary. The display will indicate
the reason if a shutdown occurs.
Minimum Stop Time
Frequent starting and stopping can damage the main
motor. The control is programmed to prevent stopping
at short intervals. If necessary, using the Emergency
Stop will override the program settings. DO NOT USE
EMERGENCY STOP UNLESS NEEDED.
Stopping
1.
Push “OFF” on the control panel switch. As the
compressor is being stopped, a message will be
displayed on the touch panel. If the compressor
was in loaded mode when the OFF button was
pushed, the control will force an unload condition.
The unit will run 30 seconds unloaded before
stopping.
2.
Open the manual drain valve, empty the drain
remained in the separator.
3.
Close the air outlet valves and disconnect the
circuit breaker.
Removal
At the end of service life of the compressor, perform
the following procedures:
1.
Stop the compressor and close the air outlet
valves.
2.
Disconnect the circuit breaker and then remove
the wires.
3.
Discharge the pressure in pipes connected to air
outlet valves.
4.
Remove the pipes.
5.
Drain the oil.
6.
Remove the compressor.
Control Panel
Components
Automatic Control
Depending on air consumption, the control panel
automatically switches load / unload operation within
the range of pressure setting. In order to reduce the
power consumption, the control panel stops the
compressor whenever possible to reduce the power
consumption and restarts it automatically when the
pressure drops to setting pressure. If the time of
unload operation is too short, the compressor will
continue to run unload operation without stopping.
On VFD models, the control will automatically slow
down the main motor to reduce compressed air
delivery as pressure rises near the unloading set point.
If pressure drops the control will speed up the motor
again. This operating mode minimizes the power use
associated with operating at higher line pressure than
needed and reduces the unloaded run time (which is
consuming power but making compressed air) and
reduces the total number of starts and stops.
Compressor Protection
The control panel will stop the compressor if
necessary. Refer to the table on the next page
for the
list of conditions that may affect the compressor. In
case of “Caution”, messages will be displayed on the
Components
Function
Emergency Stop button
Press the button to stop the
compressor immediately
Power lamp (combined
with the ON-OFF switch)
The lamp lights up when the
compressor has been turned ON
Touch panel
Touch the screen to operate or to
manage the compressor
