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operation (Please refer to what is stated in item 7.2 in announcements)
9.2 Air compressor can only be come into service when it is equipped with air
storage tank(as what is shown in Table 1-Main Technical Data).
9.3 Test run of the new machine
a) Testing voltage on page 12, item 7.1-a, shall meet the requirements in relevant provisions.
According to the requirement of item 7.1-d on page 12, it shall be grounded. According to the items
7.1-b and c on page 12, it shall be connected to the power line. The cross area and length of the
power line shall meet the provisions in Table 2 on page 12.
b) Check the oil level in gas and oil barrel to see if it is between the upper and lower limits.
c) To guarantee safety of starting up, it shall be firstly confirmed that there are no personnel,
tools and inflammable and explosive materials in the unit.
d) Pour approximate 0.2 liters lubricating oil which is specially used for air compressor to the air
inlet valve and turn the hand piece if the machine for several turns to avoid damage in dynamic and
static tray in air compressor due to oil shortage.(A funnel with net is used for filtrating to prevent
foreign matters from entering the hand piece.)
e) Charge electricity to the control panel in air compressor
f) Trial operation test: Trail operation shall be done for two or three times before the formal
operation. The purpose of Trial operation, starting up the machine and shut it down immediately, is to
check if the rotating direction of the air compressor is correct or not and if there is abnormal noise
and vibration.
g) Normal operation: Press the start button again to start the operation of the air compressor.
h) After the starting up of the machine, motors with power more than 11kw shall be set as Y-△
quick speeding up in way of △ shape.
starting up, the initial operation is slowly speeded up in way of Y shape and automatically changed to
i) Stop: When the stop button is pressed, the air compressor stops to run. The compressed air
in pressure pipeline will be discharged by load relief valve when the machine is stopped, getting
ready for the next no load starting up of the equipment. It is a normal phenomenon if some weak
sound of air discharging can be heard.
9.4 Safety protection
a) Motor protection
Breakdown
S.N.
description
Phase
1
shortage
Overload
2
Locked-rotor
3
Imbalance
4
Short circuit
5
b) Air (Oil) exhaust standard exceeding protection
When temperatures of air (oil) exhausting reach the set warning temperature, there will be alerting
information on the controller and give an alarm. When the temperature reaches set breakdown
temperature, the controller execute the order and shutdown
Breakdown display
Shutdown
Shutdown
Shutdown
Shutdown
Shutdown
Table 4
Causes
Breakdown in power supply, contactor
and motor circuit
Increase in load capacity or mechanical
breakdown
Increase in load capacity or mechanical
breakdown
Three- phase voltage of the power
supply is not stable or circuit
breakdown in motor
Serious electricity leakage, short circuit
between circles of the motor or error in
current setting
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