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Freutek JUB0001 Manual

Screw compressor 7.5 kw
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MACHINE: JUB0001 SCREW COMPRESSOR 7.5 KW
JUB0001 SCREW COMPRESSOR
7.5 KW
MANUAL
1

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Summary of Contents for Freutek JUB0001

  • Page 1 MACHINE: JUB0001 SCREW COMPRESSOR 7.5 KW JUB0001 SCREW COMPRESSOR 7.5 KW MANUAL...
  • Page 2 Before installing or starting the compressor for the first time, please read this manual carefully to gain the necessary knowledge about the compressor and understand the precautions to be taken during operation and maintenance. Give this manual to the user with the machine. This technical manual contains important safety information, so it should always be kept with the compressor.

  • Page 3: Table Of Contents

    CONTENTS Chapter I - General Part 1.1 Overview 1.2 System Flow Layout plan of the unit structure The system flow of the compressor 1.2.1 Air systems 1.2.2 Lubrication system 1.3.1 Cooling System (Air Type) 1.3.2 Water System (Water-Cooled) 1.4 Control and Protection System 1.5 Electrical System (Electrical Schematic Diagram below) 1.5.1 Microprocessor controller Chapter II - Installation...

  • Page 4: Safety Statements

    Safety Statements Carefully read and understand the general precautions before proceeding with the other safety precautions. General Handling, installation, operation, maintenance, and inspection of the equipment must be performed by appropriately trained personnel. No liability is accepted for personal injury, failure, or damage to the equipment in the event of modifications made by the user.
  • Page 5 hearing protector (frame) and the spade beam to avoid damaging the equipment 8 When using the crane, the sling should be passed through the fork hole of the bottom plate, and the cover cloth should be placed on the soundproof cover panel (frame) to prevent damage.

  • Page 6: Chapter I - General Part

    Chapter I - General part 1.1 Overview The device is a single-stage, oil-injected stationary screw compressor driven by a motor and equipped with a soundproof cover. The compressor is controlled by an advanced microcomputer controller and liquid crystal display, which can effectively reduce energy consumption and make it easier for the operator to operate and monitor the compressor.

  • Page 7: The System Flow Of The Compressor

    Unit Structure The system flow of the compressor 1.2.1 Ventilation systems The air drawn in by the air filter, through the intake valve, enters the compressor head to be compressed. The mixture of oil and compressed air enters the separation tank for preliminary separation, then into the oil and air separator.

  • Page 8: Lubrication System

    The minimum pressure valve ensures that the pressure in the separator tank is not less than 0.45 MPa, so that the lubricating oil can flow normally into the system. In addition, the minimum pressure valve is used to prevent the backflow of compressed air into the external pipe when the compressor is unloaded or stopped.

  • Page 9: Water System (Water-Cooled)

    The cooling system includes the lubricating oil cooler and aftercooler. The fan draws in cold air from outside the unit and blows it through the cooling system; The heat exchange with the compressed air and lubricating oil flowing through the cooler allows the cooling effect to be achieved.

  • Page 10: Electrical System (Electrical Schematic Diagram Below)

    microcomputer controller also monitors the compressor by automatically stopping it when it has abnormal conditions (such as engine overload, exhaust overheating, etc.). A safety valve is attached to the separator tank. When the pressure in the tank exceeds the set value, the safety valve opens automatically and quickly releases the pressure to ensure the safety of the unit.

  • Page 12: Chapter Ii - Installation

    Chapter II - Installation 2.1 Compressor Installation Site 1. It is necessary to select the appropriate installation location for the compressor, for which a dedicated installation room is recommended. The installation site must meet the following requirements: The compressor should be installed indoors, with good lighting and enough space for ease of use and maintenance.
  • Page 13 Hot air Tube Hot air Connection Hot air Air inlets Air inlets Air inlets...

  • Page 14: Electrical Safety Requirements

    2.2 Electrical Safety Requirements (Voltage 380V, e.g. 220V, 415V, etc., ensure difference ±5%) The three-phase voltage must be stable between 360~400V. It is suggested to use an independent power supply system to avoid excessive voltage drop or three-phase imbalance caused by using in parallel with other electrical equipment and possible overload of motor current.

  • Page 15: Chapter Iii - Operations

    Chapter III - Operation The operator must read this manual carefully, scrupulously comply with all relevant safety rules, including those indicated in this manual, and be familiar with the characteristics and operating methods of the device. 3.1 First Boot 1. Connect the power cord and ground wire to check if the voltage is correct and if the three-phase voltage is balanced.
  • Page 16 "delta" start-up; Close the air inlet valve slowly, so that the exhaust pressure rises until the unit begins to discharge, checking whether the exhaust pressure matches the set value (if not, it must be adjusted). Observe at the same time if the display tool and the indicator light have any abnormalities.

  • Page 17: Daily Operation

    3.2 Daily Operation 3.2.1 Startup 1. Open the screw cap and ball valve of the separator tank, drain the condensed water to the bottom of the tank after shutting off, and close immediately when the lubricating oil leaks out. Note: Before opening the drain outlet of the separator tank, you must check that there is no pressure in the tank. 2.
  • Page 18 2. Load Start about 6~7 seconds after the engine delta function starts. After 2 seconds, the solenoid valve on the intake valve is energized, the compressed air in the separator tank enters the intake valve and causes it to open, a large amount of air enters the compressor and the latter starts operating at full load.

  • Page 19: Shutdown

    In the standby state, if the air is restored and the exhaust line pressure drops to the return load setting value, the microcomputer controller restarts the unit. When the device is in standby, do not open doors or perform any kind of maintenance to avoid accidents.
  • Page 20 The operator must document the parameters observed during the daily check, noting in particular the exhaust gas pressure, system pressure, exhaust gas temperature, oil level, operating time, etc. 4. The infrared temperature detector can be used to detect temperature and record the supply voltage and current. 3.2.5 Long-term downtime Preparation If the compressor will be idle for a long time, the following preparatory steps should be...

  • Page 21: Chapter Iv - Maintenance

    Chapter IV - Maintenance 4.1 Lubricating oil Lubricating oil has a decisive effect on the performance and service life of the screw air compressor. The use of an inadequate lubricating oil can cause serious damage to the compressor. Therefore, it is recommended to use lubricating oil for our company's screw compressor.

  • Page 22: Maintenance And Replacement Of Other Parts

    7. Close the drain ball valve and attach the drain plug. Add lubricating oil to the cylinder until it reaches the upper limit of the oil level and retighten the screw cap. 8. Leave the compressor running for 5 minutes and then stop it. After the system pressure is released and the oil level is stable, slowly open the screw cap of the filler port, continue adding lubricating oil to the separator tank until the upper limit of the oil level is reached again, and tighten the screw cap of the filler door.
  • Page 23 control panel shows "oil filter use time at " to indicate that it is time to check or replace the oil filter. When changing the lubricating oil, the lubricating oil filters must also be replaced at the same time. If the use takes place under unfavorable environmental conditions, the replacement cycle should be shorter.
  • Page 24 When replacing the oil separator, take care that no foreign objects fall into the separator tank! 4.3 Cleaning the Cooler If the compressor exhaust temperature is high, clean the dust on the cooler flap with compressed air. If cleaning with compressed air is not possible, a suitable cleaning agent must be used.
  • Page 25 The method of connecting the compressor motor is clearly indicated on the nameplate. If the voltage and frequency of the compressor motor maintain the value specified on the nameplate, the motor can run continuously at the rated power multiplied by the coefficient of utilization.
  • Page 26 • That the insulation resistance to earth is not less than 3(A+1) mega ohms, One in • That the phase number, voltage and frequency of the power supply are in accordance with the nameplate; • That the vents and pipes are open; •...

  • Page 27: Chapter V - Fault Analysis And Troubleshooting

    Chapter V - Fault Analysis and Troubleshooting 5.1 Overview Compressor failure is due to a number of factors. In this regard, it is important to systematically collect the operating data of the unit. Based on this data, the operator can pinpoint the change in the unit's performance and check for hidden causes of the failure.
  • Page 28 Phenomenon Possible Causes of Failure Troubleshooting Methods 1. Can't start the 1. Blown fuse 1. Contact your electrician for repair or replacement compressor 2. The supply voltage is too low 2. Instruct the electrician to check and make the necessary adjustments 3.
  • Page 29 2. Temperature Control Valve Failure 2. Overhaul or Replacement of Temperature Control Valves 3. Inaccurate temperature sensor 3. Check and replace the temperature sensor 4. Supply pressure lower 1. The user's air consumption is 1. Reduce air consumption than rated discharge higher than the air supply.
  • Page 30 3. Air leakage 3. Check that there are no leaks in the air ducts 4. Oil and air separator blocked 4. Replace oil and air separators 5. Failure of the underpressure valve 5. Inspection/repair of minimum pressure valves 7. Compressed air 1.
  • Page 31 9. Switching loading and 1. Leaks in pipelines 1. Check the location of the leak and remove unloading is too frequent. 2. Pressure settings are too low 2. Zeroing the pressure difference 3. Unstable air consumption 3. Increase the capacity of the air storage tank and, if necessary, install pressure relief valves downstream of the tank.
  • Page 32 Schedule Screw Air Compressor Maintenance...
  • Page 33 DISPOSAL AND DEMOLITION DISMANTLING OR DEMOLITION MUST BE CARRIED OUT BY THE CUSTOMER, IN FULL COMPLIANCE WITH THE REGULATIONS IN FORCE ON THE SUBJECT. CONFERRING THE ENTIRE MACHINE OR PARTS OF WHICH IT IS COMPOSED TO COMPANIES APPOINTED FOR SUCH SERVICES. As the owner of an electrical or electronic appliance, the law (in accordance with the EU Directive 2012/19/EU on waste electrical and electronic equipment and the national laws of the EU Member States that have implemented this Directive) prohibits you from disposing of this product or its...

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