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discharge valve will be completely open. Only when the unit is abnormal during operation (for
example, oil leakage, serious air leakage, and the exhaust temperature does not automatically stop
at 110°C, If the discharge pressure exceeds 1.1 times of the rated pressure without automatic shut-
down, etc.,
it is allowed to stop the machine immediately by pressing the emergency stop
button.
8) Automatic stop system with no load and too long
If the compressor keeps running at no load when the air volume of the system is reduced, and if
the operating time is longer than the set time (generally set to 20 minutes), the compressor will
automatically stop and the motor will stop running. When the air volume of the system is increased
and the pressure of the system is reduced, the air compressor will start automatically to replenish
the air volume, and the principle of setting the time limit for unloaded operation for too long
downtime is that the motor should start no more than twice an hour. Customers can set their own
according to the conditions of use. Do not to start the motor often cause the motor burn.
3.4.2 Electric circuit
The electronic control cabinet of the air compressor can be divided into two systems, one is the
internal control system and the other is the starting disk part. The starting disk is the commonly
used Y-
△
start control of general machinery (soft start and Variable Frequency start can also be set
up according to the user's request). The control part is electronic control / plc control. Electronic
control part of the internal circuit and control is more complex, in this chapter not in-depth
introduction, if there is damage or failure, please contacts us for service directly.
4.1 Test run, start and stop
4.0 Operating
4.1.1 Connect the power cord and ground wire; test whether the main voltage is correct and
whether the three-phase power supply is correct.
4.1.2 Check if the oil level is between H.-L.
4.1.3 If the goods are delivered for more than 15 days before the test run, add 0.5-3 liters of
lubricating oil (depending on the size of the air compressor) to the air end from the inlet valve, and
turn the number of the air compressors by hand in a direct direction, so as to prevent the loss of oil