power applied after a certain period of delay.
air compressor is loaded and pressure inside gas
tank begins to increase. When increased air pressure is more than higher pressures limit (value of
unload pressure), electromagnetism valve for loading is de-energized and electromagnetism valve for
discharging is energized, meanwhile, the air compressor operates without load. If air pressure decreases
to set lower pressure limits (value of load pressure), the electromagnetism valve for loading is energized
again and electromagnetism valve for discharging is de-energized. Air compressor operates normally to
increase pressure in air tank. If the unload run time exceeds the set delay time of non-load, the
compressor will automatically stop motor’s operation to achieve automatic shutdown after works
without load for long time. Only when pressure decreases to lower pressure limits, the motor start
operation according to course of starting, then circularly repeat this step.
③
. Manual loading/unloading under automatic status
When compressor in automatically runs state and runs at unload operation, press down load or
unloading button , the electromagnetism valve for loading joggles a little and comes back to unloading
status; if the pressure is less than relief pressure, the electromagnetism valve for loading is energized
and it returns to unloading status until gas supply pressure becomes larger than relief pressure and
device is at loading status. Unloading is performed when press down unloading button “
S
”. If the
pressure is higher than loading pressure, the electromagnetism valve for loading is de-energized and
turns to status of loading until gas supply pressure is less than loading pressure. If pressure is less than
loading pressure, the unloading button do not function.
④
. Normal shutdown:
Press the button , the load magnetic valve will loss power and the unload magnetic will be applied
with power, after a while of delay (stop delay), the motor contactor will loss power, the host and fan will
stop running, after the restarting delay completed, the unload magnetic will loss power. Only pressing
the button could restart the motor.
⑤
. Control of preventing frequent starting
Press stop button to stop operation; Air compressor can not be started up immediately after shutdown
due to operation without load for long time or failure shutdowns, and it can be started up again when
remaining delay time is zero which the time display window of the controller in a variety of shutdown
state shows.
2、. Remote automatic control
Remote automatic control and local automatic control are basically same, but the difference is that
starting up or stopping of devices can be achieved by means of control of remote switch.
3、 Local manual control
Control of starting and stopping are same as automatic control, but device is in status of unloading
operation after finish starting up and loading is carried out by pressing down loading and unloading button
to load. When gas supply pressure is more than relief pressure, the device unloads automatically. If doesn’t
press loading, unloading button, the device will operate with unloading until stops without load. During
unloading, press loading and unloading button to load. During loading, press loading and unloading button
to unload.
4、Remote Manual Control
The remote automatic control is almost the same as the local manual control, the only
difference is that the start and stop of the unit is controlled by remote control.
5、 Network control
