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Shanghai Denair Compressor Co.,Ltd.
Double Screw Air Compressor
Installation, Maintenance and Operation Manual
Shanghai Denair Compressor Co., Ltd
Add: Room301, No.18 Baosheng Road, Songjiang District, Shanghai, PRC
Tel: (86-21) 37831829
Fax: (86-21) 37831829
Web: www.denaircompressor.net
www.denaircompressor.net
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Summary of Contents for DENAIR DA-30A
- Page 1 Shanghai Denair Compressor Co.,Ltd. Double Screw Air Compressor Installation, Maintenance and Operation Manual Shanghai Denair Compressor Co., Ltd Add: Room301, No.18 Baosheng Road, Songjiang District, Shanghai, PRC Tel: (86-21) 37831829 Fax: (86-21) 37831829 Web: www.denaircompressor.net www.denaircompressor.net 1/48...
- Page 2 Shanghai Denair Compressor Co.,Ltd. Usage Notice 1. Before usage, please carefully read the operation manual. 2. Only professional technicians are allowed to install MAN-KY. 3. We must well consider the installation site while doing mechanical erection to make sure the good heat dissipation and reduce the electromagnetic interference (EMI).
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Page 3: Table Of Contents
Shanghai Denair Compressor Co.,Ltd. Contents Chapter One Screw Compressor Brief Introduction…..........05--08 One. Screw Compressor Summary………………………………………........05 Two. Screw Compressor Body Structure…................05 Three. Screw Compressor Compressing Principle……………………........05 Four. Screw Technical Parameter………………………………………........06 Chapter Two Screw Compressor Instruction… ………………………………......09--28 One. Basic Operation………………………………………………………..………...... .09 Two. - Page 4 Shanghai Denair Compressor Co.,Ltd. Chapter Six Maintenance and Inspection ……………………………………………....41--43 One. Regulation of Lubricating Oil and Using Maintenance…………..........41 Two. Belt Adjustment…………………………………………………………..…..………..….41 Three. Pressure System Adjustment………………………………………........42 Four. Safety Valve Adjustment……………………………………………..… .........43 Five. Replacing Steps of Oil-gas Separator………………………..........43 Chapter Seven Maintenance and Faults Removal ……………………………………....
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Page 5: One. Screw Compressor Summary
Shanghai Denair Compressor Co.,Ltd. Chapter One Screw Air Compressor Introduction One. Screw Compressor Summary Oil injection screw compressor has the features of high reliability, fewer wearing parts, good balance of motive power, little vibration, low noise and high efficiency. During the compressing process, it will ceaselessly infuse lubricating oil to the compressing chamber and bearings by the pressure difference generated by itself. -
Page 6: Four. Screw Technical Parameter
Shanghai Denair Compressor Co.,Ltd. After air inletting, the teeth peak of main and auxiliary rotors will be closed with the main case, during which time the air will not flow out, that is to say, sealing process. Two rotors continue to do rotary motion, and its teeth peak will coincide with teeth gutter at the suction end. - Page 7 Shanghai Denair Compressor Co.,Ltd. DA Series Screw Air Compressor Technical Data ( Air-cooling) Model DA-30A DA-50A DA-75A DA-100A DA-120A DA-150A DA-175A DA-200A DA-250A DA-270A DA-300A DA-330A air-cooling Cooling type ℃ Environmental temperature≤46 air inlet pressure 1.013bar Air inlet state Air delivery/ 3.8/7...
- Page 8 Shanghai Denair Compressor Co.,Ltd. DA Series Screw Air Compressor Technical Data (Water-cooling/Air-cooling) Model DA-10A DA-15A DA-20A DA-25A DA-30A/W DA-40A/W DA-50A/W DA-60A/W DA-75A/W DA-90A/W DA-100AW Cooling type air-cooling Air inlet state ℃ Environmental temperature≤46 air inlet pressure 1.013bar delivery/ 1.1/7 1.7/7 2.4/7...
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Page 9: One. Basic Operation
Shanghai Denair Compressor Co.,Ltd. Chapter Two Screw Air Compressor Usage Instruction One. Basic Operation A. Button Instruction 自动 排气温度:80C 供压：0.80MPa 运行状态:设备已停止 后油 冷 冷 本地 0秒 却 却 器 器 Figure 1 I——start key: operate the motor by pressing the key. - Page 10 Shanghai Denair Compressor Co.,Ltd. Show the below main interface after 5 seconds. Exhaust temperature: 20℃ Air supplying pressure: 0.60Mpa Operating status: stopped Machine side Press“↓”key to enter the below menu selecting interface. Operating parameter Calendar User parameter Manufacturer parameter a、 、 、 、 Check the operating parameter Press “...
- Page 11 Shanghai Denair Compressor Co.,Ltd. b. Calendar Time Press the shift key “↓” or “↑” to move the black scroll bar to the “calendar” menu and then popup the below interface after pressing the confirm key“→”. Current time 22 February, 2004...
- Page 12 Shanghai Denair Compressor Co.,Ltd. Note: the password can be modified in the user parameter and the manufacturer password can be fixed First class Menu Second class Menu Initial setting value Function After popping the interface and appearing the flicker bit, the shift key “↓”and “↑”turn into the upturning key and down-turning key to change the current place, and the confirm key “→”becomes the shift key to move the...
- Page 13 Shanghai Denair Compressor Co.,Ltd. Star-angle delay Star-triangle decompression start 0006 Second time delay time Delay uploading time after Upload delay time 0002 Second star-triangle decompression start The deadhead continuing runtime, unload delay time 0005 Minute over which time the machine will automatically stop When shut down, don’t stop the...
- Page 14 Shanghai Denair Compressor Co.,Ltd. Ganged delay time 0000second Replacing oil filter could clear service Oil filter reset 0000 hour time Olein differentiator Replacing olein differentiator to 0000 hour reset clear service time Maintenance Replacing air filter to clear service Air filter reset...
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Page 15: Two. Function And Technical Parameter
Shanghai Denair Compressor Co.,Ltd. temperature this set temperature，early warn the machine stop. Air supplying stop When the actual air supplying pressure higher than 1.00MPa pressure the set pressure，give stop warning. Unloading pressure In user parameter， the pressure upper limit set should 0.80MPa... -
Page 16: Three. Model And Specification
Shanghai Denair Compressor Co.,Ltd. c. Phase lack protection：when any phase current lacks phase, the acting time≤2s； d. Imbalance protection：when the difference between two phase reach 60～75% , the acting time≤5s； e. As for the protecting characteristic of overloading inverse time lag (time unite is second), please see the below form. -
Page 17: Four. Dimension And Installation
Shanghai Denair Compressor Co.,Ltd. MAM—KY02S （600/5） determined according to Connecting 100～600 50～300 fan current external CT Four． ． ． ． Size and installation A. Machinery Installation a. mutual inductor installation The mutual inductor installation position should be where can measure the current (rated current) of motor... - Page 18 Shanghai Denair Compressor Co.,Ltd. 27、28、29、30、31、35、36、37、38、39 c. Power indicator PWR lamp d. Operation indicator：RUN lamp e. failure indicator：ERR lamp c. Display panel function and installation Model 200 display panel is fixed on the control cabinet panel。 排气温度:80C 供压：0.80MPa 运行状态:设备已停止 后 油...
- Page 19 Shanghai Denair Compressor Co.,Ltd. B. Electric mounting basic wiring diagram Figure7、Terminal blocks arrangement diagram Text displayer terminal blocks： ： ： ： Display panel has five terminal blocks and a display cable D shape head，which are respectively used to display connection、Rs—485 communication and 24V Power input。...
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Page 20: Five. Power Frequency Air Compressor Control Principle
Shanghai Denair Compressor Co.,Ltd. is imitated ground (ground); 43 and 44 is of 220V power。 Note： ： ： ： While wiring, magnet coil needs connecting glitch absorption Five． ． ． ． Power Frequency Control Principle A. Individual control a. On-site automatic control (on-off mode: machine side; loading mode: automatic) a) Press “I”... -
Page 21: Six. User Parameter Of Power Frequency Air Compressor And Control Principle Of Variable Frequency Electrical Appliance
Shanghai Denair Compressor Co.,Ltd. b. Remote automatic control (on-off mode: remote; loading mode: automatic) In general, the remote automatic control is the same with the on-site automatic control, however, the difference is that the remote automatic control can be accomplished by controlling remote switch when starting and stopping the equipment. - Page 22 Shanghai Denair Compressor Co.,Ltd. A. User parameter and function of variable frequency air compressor Initial setting First class Menu Second class Menu Function value Pressure upper bound *.**MPa Download pressure value Pressure lower bound *.**MPa Upload pressure value Fan start temperature ***℃...
- Page 23 Shanghai Denair Compressor Co.,Ltd. Communication code 0255 Communication address Ganged state Air-End Ganged start and stop Order Alternating time 9999 hour Ganged Ganged machine 0016 parameter preset Number Lower limit of ganged *.**MPa pressure Upper limit of ganged *.**MPa pressure...
- Page 24 Shanghai Denair Compressor Co.,Ltd. Parameter item Set initial value Functions After start delaying ，When the motor current value Motor ‘s allowed greater than 1.2 times and below 4 times that of set value， Air-end rated current maximum overload please delay the machine jumping according to overload ╱...
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Page 25: Seven. Early Warning And Prompt
Shanghai Denair Compressor Co.,Ltd. Idling frequency 00.0Hz Set by machine type Frequency upper limit 00.0Hz Operating mode Variable frequency C. Variable frequency electric control principle drawing Seven. Early warning and Prompting A. Warning device The system totally has four kinds of warning devices. Air filer blocking indicator lamp, oil filter blocking indicator lamp, oil-gas filer blocking indicator lamp and oil level over low indicator lamp are all displayed on the dashboard. - Page 26 Shanghai Denair Compressor Co.,Ltd. Text display indicator A、Air filter pre-warning indication a、Check pre-warning by switch signal The controller indicates“air filter blocked” on the text indicator to the operator by inspecting the pressure difference switch action of the air filter. b、Set the pre-warning of air filter service time When the air filter service time is out, the text display indicates the operator “air filter service time is out”...
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Page 27: Eight. Safeguard
Shanghai Denair Compressor Co.,Ltd. Terminal number 27、28、29、30、 Output switch quantity 31、 35、 36、 37、 38、 39 output switch OUT00~09relevant indicator lighted quantity action Data storage Set data and storage time PWR flicker Eight、 、 、 、 Security protection A. Protection on the motor Air compressor protects the motor against short circuit、... - Page 28 Shanghai Denair Compressor Co.,Ltd. B. Exhaust temperature protection When the discharge temperature is high than the upper limit of set temperature or less than the lower limit of set temperature, the controller stop warning, and displayer shows that the discharge temperature is high or low. The set highest exhaust temperature of the system is 100 ℃, if over it, the system will automatically cut off the...
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Page 29: One. System Flow And Parts Name
Shanghai Denair Compressor Co.,Ltd. Chapter Three System flow and all parts functions One. System flow and part name www.denaircompressor.net 29/48... - Page 30 Shanghai Denair Compressor Co.,Ltd. www.denaircompressor.net 30/48...
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Page 31: Two. System Flow
Shanghai Denair Compressor Co.,Ltd. Two. System flow A. Air flow After eliminating dust by air filter, the air will be compressed in the air end compressing chamber via inlet valve and mixed with lubricating oil. The compressed compound air enters the oil-gas tank to be primarily separated, and after the first separation, the compound air will enter the after-cooler via minimum pressure valve after precision separation in the precision oil-gas separating core, and at last, it enters the air supply pipeline through outlet valve. - Page 32 Shanghai Denair Compressor Co.,Ltd. diaphragm will decrease, and the valve rod can also push rightward to increase the air inflow, which is the volume adjusting process. If the air usage amount of the system decrease a lot and the rise speed of pressure exceed the reflecting ability of volume adjustment, the pressure switch will act to make the solenoid valve lose electricity, and the left air inlet braking chamber lose pressure and the valve rod will be pushed to its closed position by spring to cut off air inflow.
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Page 33: Three. Lubricating Oil
Shanghai Denair Compressor Co.,Ltd. the oil-gas separating effects. L. Cooler a. If it is the air-cooling cooler, using cooling fan to draw cool air and cool compressed air by cooler. Its exhaust temperature is often below atmospheric temperature +15℃. Air-cooling air compressor is much more sensitive to environmental temperature, so please pay attention to the environmental ventilation when choosing its location. - Page 34 Shanghai Denair Compressor Co.,Ltd. influence the cooling effects, and the exhaust temperature will be over-high, which will cause the machine trip. Therefore, at regular intervals, the dust on the fins should be blown away by low-pressure compressed air, and if unable to blow off, it should be cleaned by solvent to make sure the cleanness of cooler heat dissipation surface.
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Page 35: One. Acceptance And Installation
Shanghai Denair Compressor Co.,Ltd. temperature and will open full when it is 72℃, at which moment, all oil will enter the compressor through oil cooler. D. Cooling system a. Air-cooling machine. Cool air is sucked by a circulating fan to blow over the heat dissipating fins of cooler and exchange heat with compressed air and lubricating oil to reach the cooling effects. -
Page 36: Two. Compressor Installation
Shanghai Denair Compressor Co.,Ltd. for maintenance. f. Reserve maintenance space to make sure there should be at least 70cm distance between air compressor and wall. g. If the air compressor is placed in a sealed air compressor room, it should be installed with an exhaust fan to keep the temperature of the machine room. -
Page 37: Four. Foundation
Shanghai Denair Compressor Co.,Ltd. b. The pressure drop in the tubing line should not be more than the 5% set pressure of air compressor, so it is better choose the caliber with its size larger than the design value during piping time. -
Page 38: Six. Cooling Water Amount Consumed By Water-Cooling Screw Compressor
Shanghai Denair Compressor Co.,Ltd. c. The air compressor cooling water system is better used alone to avoid that water shortage affects cooling effect. d. Cooling water tower must suit the regulated water amount of air compressor, at the same time, the selection of suction pump power should be right. -
Page 39: One. Test Run, Start Up And Shut Down
Shanghai Denair Compressor Co.,Ltd. the rated current. If the three-phase a.c. Is not balance, the ratio of the lowest one-phase current and the highest one-phase current should not be over 5%, meanwhile, if voltage drop exists, the voltage drop should not be 5% lower than the rated voltage. -
Page 40: Three. Cautions During Operation
Shanghai Denair Compressor Co.,Ltd. c. After stopping for ten seconds, water the oil level, and the oil level during operating may be a little lower compared with that when machine stops. Three． ． ． ． Operation notice. a. Stop immediately when there is abnormal sounds and vibration during operation. - Page 41 Shanghai Denair Compressor Co.,Ltd. Chapter Six Maintenance and Inspection One． ． ． ． Lubricant oil standard and use maintenance A. Usage recommendation: Special oil for screw air compressor B. Oil change step a. Operate the air compressor to rise oil pressure in favor of discharging and then press the button ”OFF” to stop operating.
- Page 42 Shanghai Denair Compressor Co.,Ltd. Check the belt after the new machine operating 30hours for the first time, if appearing too loose phenomenon, it should be adjusted immediately and then regulated again every 1500 hours. a. As the picture shows, add the load on the belt to measure its deformation by a tension meter and spring balancer.
- Page 43 Shanghai Denair Compressor Co.,Ltd. If the customer’s air volume of the using system is less than that of air compressor, the air volume regulating system can automatically adjust the air supply of air compressor. Set the pressure of air volume pressure regulator, and when the system pressure has not reached the set empty load pressure, let little air enter the bottom of air volume adjusting valve by air volume pressure regulator to push up the piston and begin regulating the air volume.
- Page 44 Shanghai Denair Compressor Co.,Ltd. Press the key “↓”all the time to pop out: History malfunction Factory number Site malfunction Press the key“→”to pop out the following failure causes: Temperature sensor out of order 170 ℃ At the moment, we should mainly examine whether the temperature sensor is off line, and the sensor is damaged and so on.
- Page 45 Shanghai Denair Compressor Co.,Ltd. f. Failure on air compressor f. Manual operates the machine, if unable to rotate it, please contact our service department. a. Too high air a. Check the air consumption and if consumption( the pressure is necessary, please increase the number of operating under the set value) compressor.
- Page 46 Shanghai Denair Compressor Co.,Ltd. failure cooler, if not, please replaces the temperature control valve. Failure Cause Method h. Unclean air filter h. Clean the air filter by low-pressure air Continue the above form i. Blocked oil filter i. Replace oil filter j.
- Page 47 Shanghai Denair Compressor Co.,Ltd. Nine．Air volume of compressor b. Bad action of air inlet valve valve and fill lubricating grease. lower than the normal value c. After dismantle, check the valve seat c. Bad action of and the non-return flap valve block to find...
- Page 48 Shanghai Denair Compressor Co.,Ltd. Three. Screw air compressor operating recording form Year Month Date Time Item Oil-gas tank level Air filter ∆P indication Oil filter ∆P indication Oil-gas separator ∆P indication Operating current （A) Operating voltage （V) Exhaust pressure （Kg/cm2G) Exhaust temperature℃）...
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