DALGAKIRAN TIDY 20B-50, Operator'S Handbook Manual, Page: 70 / 157

13
Operation Phases
Start
9 When the Start button is pressed the motor is switched on. The solenoid valve that supplies air to
intake valve energizes at the star-delta start and opens the air lines. Until this moment, intake
valve is closed.
9 When compressor is in delta operation, the air absorbed from the pilot part of the intake valve
increases the internal pressure. When pressure reaches a reasonable level the clapet of the
intake valve opens and compressor is getting loaded.
Load Running
9 When the air pressure inside the separator tank increases to approximately 4 bars, minimum
pressure valve is opened and sends the compressed air to cooler and cooled air in the
combicooler comes to air receiver to be used in system. During this period the intake valve is open
and control solenoid is energized.
Unload Running ( Idle )
9
When the line pressure reaches the unloading pressure value that the electronic controller unit or
pressure switch is adjusted, the unit or pressure switch cuts the energy of control solenoid valve.
9 The pressure force behind the intake valve clapet is lost; the spring pushes the clapet and
prevents suction of compressor.
9 The intake valve sends some portion of air inside the airend unit under control and provides the
circulation of compressor for cooling and lubrication during idle operation. During this time internal
pressure is decrease under control.
9 During idle operation the return of external pressure to tank is prevented by minimum pressure
valve.
9 When the line pressure is reached to the loading pressure value that the electronic controller unit
or pressure switch is adjusted; the unit or pressure switch reenergizes the control solenoid valve
and loads the compressor.
Automatic Stop Phase
9
If the air consumption is low and if the compressor operates for a certain time on idle; the
controller unit counts the idle operation period and stops the compressor at the end of period.
9 If the line pressure falls to the loading value before the adjusted period; the idle compressor will be
loaded again without stopping.
For Inversys Series
9
The aim of system is to keep the utility air continuously at requested pressure value.
9 The inverter driven compressor adjusts the speed of motor by measuring the pressure value of the
utility air by means of pressure sensor.
9 When adjusted pressure value is reached, the inverter decrease the speed of motor. Based on the
variation of air consumption keeps the system pressure constant by deciding on acceleration and
deceleration of motor.
9 If the air consumption to become less than the minimum capacity of compressor, the inverter
decreases the speed to minimum and operates the compressor on idle.
4.4
WORKING PRINCIPLES OF AIREND UNIT
9 The airend unit on TIDY series is a single stage, oil injected and positive displacement unit. The
airend unit is composed of two special constructed rotors that operate in parallel to each other, the
bearings of rotors and the rotor casing / body that maintains these rotors. The rotors are
asymmetric helical profiled of male and female structure.
9 When the male profile is driven by motor, it turns with female profile in the casing / body.
9 The air received from the suction side is trapped by the rotors and directed towards the outlet port
inside the casing / body and compressed.
9 Contact of profiles to each other is prevented by the oil that enters the airend; the oil also prevents
the slip of compressed air backwards.
Any kind of modification on the airend unit without the permission of our company
abolishes the full guarantee of the compressor