DENAIR DA-30A User manual

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Double ScrewAirCompressor
Installation, Maintenance and Operation Manual
Shanghai Denair Compressor Co., Ltd
Add: Room301, No.18 Baosheng Road, Songjiang District, Shanghai, PRC
Tel: [phone] Fax: [phone]
Web: www.denaircompressor.net

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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).
4. When laying out the wire, please do it according to the rule of the separating wiring of strong current and weak
current with the hope of reducing the EMI.
5. Inductive loads, for example, the AC Contractor which controls the relay output, must be connected with surge
absorber.
6. Before turning on the electricity, please carefully check the input/output wiring.
7. The correct grounding connection (the third one) of the machine body’s earth terminal can improve its noise-proof
capability.
8. The setting of the motor rated current (machine tripping current) is as per that the motor nameplate rated current
╳ the motor overload multiple /1.2
Features:
● LCD display in Chinese and English.
● All-round protection of the motor against the short circuit, blocked rotor, phase lacking, overload, imbalance and
so on.
● Motor on-off control and operation control.
● Protection of the air compressor against reversion.
● Protection of multi-point temperature by checking and controlling.
● Control the pressure balance by automatically adjusting the load rate.
● High integration, reliability and cost performance.
● Remote or on-site selection control.
● Ganged or independent selection operation.
● RS-485 communication function.
Notice: No right to enjoy the free maintenance service if products are damaged by not using the original
spare parts.

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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. Function and Technical Parameter……………………...…………...…......................... .....15
Three. Model and Specification…………………………………………......................………. .....16
Four. Dimension and Installation………………………………………………......................... .....17
Five. Power FrequencyAir Compressor Control Principle………......................................... ....20
Six. User Parameter of Power Frequency Air Compressor
and Control Principle of Variable Frequency ElectricalAppliance…….……..……………. .21
Seven. Early Warning and Prompt…………………………………………………………............. .25
Eight. Safeguard………………………………………………………………………….................. . 27
Chapter Three System Flow and Functions of all kinds of Parts …………......................28--35
One. System Flow and Parts Name…………………………………......................................... .. 28
Two. System Flow ……………………………………………………………….....….... .. .. 31
Three. Lubricating Oil……………………………………………………………........................... . .33
Chapter Four Compressor Acceptance and Installation… ………………………….............35--38
One. Acceptance and Installation………………………………………….......…….................. ...35
Two. Compressor Installation......……………………………………………............................. ...36
Three. Cautions for Air Supplying Line Installation……………………................................... ....36
Four. Foundation………………………………………………………………….……................ .....37
Five. Cooling system………………………………………….………........…….………………... ...37
Six. Cooling WaterAmount Consumed by Water-cooling Screw Compressor…………........ ....38
Seven. General Regulation and Safety Rules of Electrical Appliance………......... ................ ...38
Chapter Five Operation ……………………………………………………………………..................39--40
One. Test Run, Start up and Shut Down……………………… …............................................. 39
Two. Examination before Starting up………………………… …….......….…..........................…. 39
Three. Cautions during Operation…………………………… ……………….................................40
Four. Handling Methods for Long-term Shut Down………… ………….......................................40

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Chapter Six Maintenance and Inspection ……………………………………………...................41--43
One. Regulation of Lubricating Oil and Using Maintenance…………..........................................41
Two. BeltAdjustment………………………………………………………….... ...….......………..….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 ……………………………………............ ..43--48
One. Common Faults Disposal………………………………...…………................................. .. 43
Two. Faults Removal Form………………………………………………….........….…………. .....44
Three. Screw Air Compressor Operation Log Sheet……………………............................... .....48

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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. The design
has the following features:
a. Infused lubricating oil can form oil slick between rotors, and the female rotor can be directly driven by male
rotor and plays the sealing effects.
b. Lubricating oil can reduce the noise produced by high-frequency compression.
c. Lubricating oil can absorb large amount of compression heat.
d. Lubricating oil is applied to lubricate bearings of rotary screw, and the high-quality lubricating oil can reduce
the bearing abrasion and lengthen its service life.
Two. Screw Compressor Structure
A. Basic Structure
Oil Spouting Screw Compressor is a kind of double-shaft volumetric returnable compressor. The air inlet is above
the main case while the air outlet is at the bottom. A pair of male and female rotor of high precision is horizontally
and parallel placed in the inner of the main case. The male rotor has five shaped teeth while the female rotor with six.
As for the diameter size, the male rotor is much larger than that of the female rotor. The rotary shaped teeth encircle
the outer edge of rotors and mesh with each other. The two terminals of female and male rotors are supported by
bearings with a pin roller bearing at the air inlet and a four-point bearing and a pin roller bearing at the air outlet.
Rolling bearing bears radial force and four-point bearing is responsible for axial thrust.
B. meshing
The male rotor is driven by the motor through coupling、overdrive gear or belts. Because of the two rotors
meshed together, the male rotor directly drives the female rotor to rotate together. The cooling lubricating oil directly
infuse into the meshed part between rotors from the bottom of compressor main case through the nozzle, mix with
air and bring the heat produced by compression to reach cooling effects. Meanwhile, it forms oil slick to prevent the
direct connection between rotors and the distance between the closed rotors and main cases. The infused
lubricating oil can also reduce noise generated by high-speed compression, and the weight of spurting oil should be
about 5-10 times than that of air.
Three. Compressing Principle of Screw Compressor
A. Air absorbing process
The air inlet design of the screw compressor can make the compressing chamber absorb air absolutely. The air
suction is only adjusted by on-off of the regulating valve. When the rotor is rotating and its alveolus rotates to the air
inlet, the space is the largest, and the rotor alveolus space freely communicates with air inlet, which is because the
air in the alveolus has been discharged out totally during venting process, and after venting, the alveolus is at the
vacuum state. When rotating to the air inlet, the outer air is absorbed to the alveolus along the axial direction. With
the rotor rotating, the air will fill the whole alveolus, and the tooth space of male rotor begins to mesh with the
alveolus of female rotor to integrate step by step until the action line and air in the alveolus was totally closed.
B. Sealing and Transporting Process

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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. The coinciding surface will gradually move to the exhausting end,
which is just the transporting process.
C. Compressing and Oil Spurting Process
The closed chamber composed of female rotor、male rotor and main case continues to rotate with rotors and its
active line moves towards the exhausting edge, that is to say, the alveolus volume between the active line and air
outlet gradually decreases and the inner air is compressed to increase the pressure, meanwhile, lubricating oil
infuse the compressing chamber and mix the air.
D. Exhaust Process
When the meshing end face of rotors rotates communicates with the air outlet of the main case, the pressure of
the compressing air reach the highest, and the mixed air of compressed air and lubricating oil is discharged together.
Since the alveolus completely broke away from the air outlet, the volume of the alveolus is zero and the venting is
over, so it will enter the next new working process of air absorbing, compressing and venting.
1.Air absorbing process 2.Sealing and transporting process 3.Compressing and oil feeding process 4.Air discharging process
Four. Screw Compressor Technical Parameter

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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
Cooling t pe
air-cooling
Air inlet state
Environmental temperature≤46 air inlet pressure 1.013bar℃
3.8/7 6.4/7 10.5/7 13.6/7 16.0/7 20.8/7 24.0/7 27.7/7 32.5/7 34.0/7 36.6/7 43.0/7
3.5/8 5.9/8 9.8/8 13.0/8 15.5/8 19.5/8 23.0/8 26.5/8 31.0/8 32.0/8 34.5/8 40.0/8
14.0/10 17.5/10 20.0/10 22.5/10 26.0/10 28.0/10 31.0/10 37.0/10
Air delivery/
working
pressure
(m
3
/min/
bar)
11.5/13 15.8/14 18.0/13 20.1/13 25.1/13 26.0/13 28.5/13 33.0/13
Power（KW)
22 37 55 75 90 110 132 160 180 200 220 250
Speed
(r/min)
1480/2980
Start way
Y-∆start
Noise dB(A)
72±5dB
Content
of oil
discharge
1-3ppm
Air outlet
temp
Environmental temperature +15℃
Cooling air
volume
(m3/min)
145 255 268 400 400 600 630 850 850 850 875 900
Pipe
connection
size
1'' 1/4'' 2'' 2'' 2'' 21/2'' 2 1/2'' 2 1/2'' DN100 DN100 DN100 DN100
Total
Weight
(kg)
640 980 1250 1850 2100 2580 2700 3200 3700 4000 4260 4800
L
1400 1600 2100 2500 3150
W
850 1000 1250 1750 1840
Size
(mm)
H
1150 1400 1700 2000 2000

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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℃
1.1/7 1.7/7 2.4/7 3.1/7 3.8/7 5.2/7 6.4/7 8.0/7 10.5/7 11.7/7 13.6/7
1.0/8 1.6/8 2.2/8 2.9/8 3.5/8 5.0/8 5.9/8 7.7/8 9.8/8 11.3/8 13.0/8
0.8/10 1.4/10 2.1/10
2.7/10
3.2/10 4.3/10 5.5/10 7.0/10 8.7/10 9.5/10 11.6/10
Air delivery/
working
pressure
(m
3
/min/ bar)
0.6/13 1.2/13 1.7/13 2.2/13 2.7/13 3.7/14 4.8/13 5.8/13 7.5/13 8.4/13 10.0/13
Power (KW) 7.5 11 15 18.5 22 30 37 45 55 65 75
Speed(r/min) 1480/2980
Voltage/power
(V/HZ) 380V/50HZ
Start way
Direct drive
Y-∆start
Noise dB(A) 72±5dB
Content of oil
discharge 1-3ppm
Air outlet temp Environmental temperature +15℃
Cooling air
volume(m3/min)
80 80 100 145 145 255 255 255 268 268 400
Cooling water
volume(m3/h)
1 1.5 1.5 2.0 2.5 2.8 3.3
Pipe
connection
size
3/4'' 1'' 1'' 1'' 1'' 1 1/4'' 1 1/4'' 1 1/4'' 2'' 2'' 2''
Total Weight
(kg) 410 475 560 580 640 900 980 1050 1250 1530 1850
L 800 1150 1200 1350 1950
W 720 700 850 950 1320
size(mm)
H 850 1180 1300 1600 1570

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Chapter Two
Screw Air Compressor Usage Instruction
One. Basic Operation
A. Button Instruction
Figure 1
I——start key: operate the motor by pressing the key.
O——stop key: stop the motor operation by pressing the key.
S——setting key: after revising data, confirm the data storage and input by pressing the key.
↑——up key: when \revising data, change it by pressing the key to do upturning; a selection key when doing
menu option.
↓——down key: when revising data, change it by pressing the key to do down turning; a selection key when
doing menu option.
→——shift key and confirm key: when revising data, it is shift key and confirm key when menu selection.
↳——backspace key or reset key: when menu operation, it is the backspace key, by pressing which to return
the previous page; when orderly close-down, press the key to reset.
B. Status display and operation
Show the following interface after the machine set powering on.
Welcome to use
Screw Compressor
运行状态:设备已停止
0秒
自动
S
本地
冷
冷
却
器
却
器
后油
排气温度:80C
供压：0.80MPa
O
I

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Show the below main interface after 5 seconds.
Press“↓”key to enter the below menu selecting interface.
a、
、、
、Check the operating parameter
Press “ ↓ ”or “↑”key to move the black scroll bar to the menu“operating parameter”and then press
the confirm key “→”to popup the next menu.
Press the key “ → ”again to popup:
If it is the last menu, the interface will not appear the black scroll bar, so press the backspace key “↳
↳↳
↳”to
return the previous menu or the main interface. If stopping operation in a certain interface, it will automatically get
back to the main interface after several seconds.
We can absolutely observe operating parameters, such as the operating time, operating time for this time,
maintenance parameter, historical breakdown, production date, on-site stoppage and so on and return to the
top-level menu by the same method with the help of using the shift key“↓”、“↑”, confirm key “→”and backspace
key “↳
↳↳
↳”.
Exhaust temperature: 20℃
Air supplying pressure: 0.60Mpa
Operating status: stopped
Machine side
Operating parameter
Calendar
User parameter
Manufacturer parameter
Main engine and fan current
Total operating time
Operating time for this time
Maintenance parameter
Current (A): R S T
Main engine: 56.1 56.2 56.0
Fan: 4.1 4.1 4.1

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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“→”.
The date and time can be adjustable at the stopped status, and the operation methods are as follows:
Press the shift key“↓”or“↑”to move the black scroll bar to the data needed to change and then press the confirm
key“→”and appear a flicker bit, at which moment, the shift key “↓”or “↑”turns into the upturning key or
down-turning key to change the current place, and the confirm key “→”turns into the shift key to move the
modification place.After modification, press “S”to confirm and save it, and the shift key “↓”or “↑”grows back
to be the moving black scroll bar and the confirm key “→”back to be the backspace key.
c. User Parameter
A. Parameter modification method
══
════
══unallowable to change the user parameter and manufacturer parameter in the process of operating
status and delayed stop══
════
══
The user parameter can be checked and changed by applying the above checking method of operating
parameter, for example, altering the pressure upper limit, and the operation methods are as follows:
Press the shift key “↓”or “↑”to move the black scroll bar to the menu “user parameter”and then press
the confirm key “→”to popup:
Press the confirm key “→”to popup:
If not continuing to press the confirm key “→”, we can check the user parameter. Press the confirm key “→”to
popup the below interface which requiring input the user password.
Current time
22 February, 2004
Sunday
12hours 46 minutes 59 seconds
Pressure and temperature preset
On-off delaying preset
Operation mode preset
Ganged parameter preset
Pressure upper limit 0.8MPa
Pressure lower limit 0.6MPa
Fan starting temperature 80℃
Fan stopping temper ature 70℃
Input password
****

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Note: the password can be modified in the user parameter and the manufacturer password can be fixed
as
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
modification place. Finally, press “S”to confirm the input and popup the below interface.
The shift key “↓”or “↑”changes into the black scroll bar and the“→”gets back to the confirm key. Press the
confirm key “→”at the“pressure upper limit”by using the scroll bar, at which time, it appears the flicker bit, and
the shift key “↓”or “↑”turns into the upturning key and down-turning key to modify the current place while the
confirm key“→”turns into the shift key to move the modification place. After inputting, press“S”to do confirmation,
and the flicker bit disappears. The “↓”or “↑”changes into the moving black scroll bar and the “→”back to be
the confirm key which can continue to revise other user parameter. If it is unnecessary to change other parameter,
press the key “↳
↳↳
↳”to return to the top-level menu or the main menu. Using the same methods can revise other
user parameter.
B. The user parameters and function
First class Menu Second class Menu Initial setting value Function
Pressure
upper bound *.**MPa Download pressure value
Pressure
lower bound *.**MPa Upload pressure value
Fan start
temperature ***℃Control fan starting
pressure and
temperature preset
Fan stop
temperature ***℃Control fan stopping
Air-end start time 0008 Second Controller protects motor to avoid
striking current when motor starts.
On-off
time-delaying
preset Fan start time 0006 Second Controller protects motor to avoid
striking current when motors starts.
Pressure upper limit 0.8MPa *
Pressure lower limit 0.6MPa
Fan starting temperature 80℃
Fan stopping temperature 70℃

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Ganged state Air-End Multi-machine ganged operation as
“air end”or“slave-machine”, and the
air end controls the slave-machine
Ganged start and
stop Order
Alternating time 9999 hour
Ganged machine
Number 0016
Lower limit of
ganged pressure *.**MPa
Ganged
parameter
Preset
Upper limit of
ganged pressure *.**MPa
Star-angle delay
time 0006 Second Star-triangle decompression start delay time
Upload delay time 0002 Second Delay uploading time after
star-triangle decompression start
unload delay time 0005 Minute The deadhead continuing runtime, over which time the machine will
automatically stop
Stop delay time 0010 Second When shut down, don’t stop the machine until delay the time after
the deadhead.
Start delay time 0100 Second Restart after delaying the time when
the deadhead’s overlong stop.
Alternating delay
time 0000 Second Additional function
Dewatering-on delay
time 0002 Second Continue the drainage time when controlling automatic dewatering.
Dewatering-off delay
time 0010 Minute Dewatering interval time when controlling the automatic drainage.
On-off mode Machine side Set as transport distance, the machine side key and remote switch
can start and stop the equipment
Uploading mode Automatic Set as manual state, only press the
key to control
Uploading/downloading
Communication
mode Forbidden Set as forbidden, the
Communication is useless.
operation mode
Preset
Communication code 0255 Communication address

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Ganged delay time 0000second
Oil filter reset 0000 hour Replacing oil filter could clear service
time
Olein differentiator
reset 0000 hour Replacing olein differentiator to clear service time
Air filter reset 0000 hour Replacing air filter to clear
service
time
Lubricating oil reset 0000 hour Replacing lubrication oil
to clear service
time
Maintenance
parameter reset
Lubricating grease
reset 0000 hour Replacing lubricating grease to clear service time
Oil filter 9999 hour Set as“0”， the time early warning of
oil filter is useless
Olein differentiator 9999 hour Set as“0”， the time early warning of
oil differentiator is useless
Air filter 9999 hour Set as“0”， the time early warning of
air filter is useless
Lubricating oil 9999 hour Set as“0”，the time early warning of
lubricating oil is useless
Max service time
preset
Lubricating grease 9999 hour Set as“0”， the time early warning of
lubricating grease is useless
Chinese-English
choice Chinese Set as“English”, the interface turns into English operation
Alter user
password **** User can alter password
C. Manufacturer Parameter
The difference between manufacturer parameter and user parameter is that manufacturer parameter can’t be
checked and should be altered just according to the manufacturer password, and the altering operation method is
the same with that of user parameter. As for its main functions, please refers to the below chart:
Parameter item Set initial value Functions
Air-end rated current Motor ‘s allowed maximum overload
value 1.2╱
After start delaying ，When the motor current value
greater than 1.2 times and below 4 times that of set
value，please delay the machine jumping according
to overload characteristic.
Fan rated current Motor ‘s allowed maximum overload
value 1.2╱ditto
Exhaust early warning
temperature. 105℃When the actual exhaust temperature higher than 他
the set temperature，prompt warning.
exhaust early warning 110℃When the actual exhaust temperature higher than

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temperature this set temperature，early warn the machine stop.
Air supplying stop
pressure 1.00MPa When the actual air supplying pressure higher than
the set pressure，give stop warning.
Unloading pressure
upper limit 0.80MPa In user parameter，the pressure upper limit set should be less or equal to the set value.
Alter loading time ****hour Manufacturers can modify loading operation time
Alter running time ****hour Manufacturers can modify the total operating time
History fault reset **** After Inputting history fault password，the faults will
be completely cleared out.
Current imbalance
degrees 0006
When (the maximum phase current minimum╱
phase current ) (1 + (S≯et value /10 ）〕，the
imbalance protection action stops 。When set value
≥15 ，the imbalance protection is useless.
Continuing phase
protection time 0005 When open phase time set greater or equal with
20seconds，the Phase doesn’t work。If imbalance
protection works，the imbalance protection will act。
Overload restart delay 0000minute If motor overloading stop，only start the machine by time delay no matter power down or reset to avoid
the motor frequent starting.
date of production ****year**month**day The production date of the manufacturer input device
Factory number ****** The factory number of the manufacturer input device
Two. Function and technical parameters
A. Switching value：nine-way switching value input and ten-way switching value of the relay switch output ；
B. analog quantity：two-way Pt100 Temperature input，two-way 4～20mA transducer inputs and
two sets of three-phase current input.(Mating CT)
C. Sequence input voltage：three phase380V；
D. Controller working power：220V、50Hz、20VA
E. Display range
a）、oil temperature：—20～150℃；Accuracy ：±1℃。
b）、Air temperature：—20～150℃；Accuracy：±1℃。
c）、Operating time：0～999999hour。
d）、Current display range：0～999.9A。
e）、Pressure：0～1.60MPa. Accuracy ；0.01Mpa。
F. Sequence protection：when protector detects wrong phase ，the acting time≤2s；
G. Motor protection：the controller has over 5 kinds of basic protection functions on main motor and fan motor
a. Rotor locked protection：After starting，When the working current reach to four to eight times of the set
current，the acting time≤0.2s
b. short-circuit protection：If the current is detected to has reached over eight times of the set current，the
acting time≤0.2s；

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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. Multiple＝I actual value ／I set value.
When the motor running current is more than or equal to 1.2 times the current set to 3.0 times, deferred
action according to the overloaded multiple and actuation in below table
I actual/I set
Time parameter ≥1.2 ≥1.3 ≥1.5 ≥1.6 ≥2.0 ≥3.0
Acting time 60 48 24 8 5 1
Table 2、The curve form of motor protection inverse time lag
H. Temperature protection：when detecting the actual temperature greater than the set temperature , the
acting time≤2s；
I. Output relay switch contactor capacity：250V5A；contactor life is 500000 times；
J. Current display error is less than1.0%.；
K.RS—485communication.
Three．
．．
．Type and specification
A. Model Instruction
MAM—KY02S（
（（
（40）（
）（）（
）（B）（
）（）（
）（T）
））
）—Ⅷ
ⅧⅧ
Ⅷ
VIII Control mode Ⅷ
ⅧⅧ
Ⅷ
T：with RS—485 communication
B：transmitter; K：pressure switch
Adaptive main motor maximum normal working current
V：Vane air compressor；S：Screw air compressor
02 type air compressor controller （LCD Chinese display）
Product series
B. Adaptive motor power specification table
Parameter
standard
current range
（A）
Adaptive
main motor
power（KW）
remark
Introduction
MAM—KY02S（20）8～20 4～10
MAM—KY02S（40）16～40 8～20
MAM—KY02S（100） 30～100 15～50
MAM—KY02S（200） 80～200 40～100
MAM—KY02S（400） 160～400 80～200
Fan current contains
0.2~2.5A grade、
1~5Agrade, and 4~10A
grade. The three kinds
of current are

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35
106
5
47
25
5
MAM—KY02S（600/5）
100～600 50～300 Connecting
external CT determined according to
fan current
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
line, so the controller can be set as per the motor name board, and its detailed installation dimension is as follows:
Figure 2、CT1 structure size（ф36 perforation）Figure 3、CT1 structure size
Figure 4、CT2 structure size（ф10 perforation）Figure 5、CT2 installation size
b、Controller installation
The controller should be installed in the control cabinet, and there should have some space around the controller
to make the wiring easy。The detailed dimension is as follows：
a. input indicator light（IN）：
00、01、02、03、04、05、06、07、
They are respective the terminal number
of the
corresponding input switch value
20、19、18、17、16、15、14、13。
b. output indicator（OUT）
00、01、02、03、04、05、06、07、08、09
They are respective the terminal number
of the
corresponding output switch value
113
44
63
oabc
A
B
57
34
50
A
B
a
obc

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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。
Figure 6、Plate size and the size of opening holes
运行状态:设备已停止
0秒
排气温度:80C
O
S
本地
250
150
138
50
22
14
3
油
后
却
冷
冷
却
器
器
供压：0.80MPa
I

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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。
Controller wiring terminals:
Display panel and controller are connected with communication cable. 23、24 and 25 are phase sequence input
terminal ；7 and 9 are exhaust temperature input terminal ；CT1 is the main motor mutual inductor ；CT2 is fan
motor mutual inductor。32 is output relay public terminal COM1；27 controls the main contactor ；28 controls star
contactor ；29 controls angular contactor ；30 uploads solenoid valve；31controls fan；34controls step-less valve；
35 operates switch valve；37 is operation indicator; 38 is failure indicator；39 is warning instructor；40 is COM2; 42

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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” key to start：（Y— s△）
The controller has 3 seconds self examination after powering on and can’t start up by pressing “I”key. After self
examination, press the “I”key to start the main engine. The processes of the main engine starting are as follows:
KM3 and KM2 get electricity Type Y starting status delay the time to Y—△ Transferring time, the KM3
losses electricity( KM1 and KM3 lock each other) and KM1 gets electricity the motor operates at the △
status and starting ends. During the starting process, all the electromagnetic valves loss electricity all the time and
realize the deadhead starting.
b). Automatic operation control：
After the motor starting to be the △status and delaying a certain time, charge the electromagnetic valves to get
electricity, and the air compressor begins to load while the gas tank pressure gets to rise. If in a set time (within
deadhead time), the air pressure lower again than that of the setting lower-limit pressure (loading pressure value),
loading the electromagnetic valve to get electricity and unloading the electromagnetic to loss the electricity, so the
compressor compresses air normally and increases the gas tank pressure. The gas tank pressure hasn’t be
reduced to the lower-limit pressure if during the deadhead time, so the controller will automatically stop the motor
work to realize the deadhead automatic stop. Only if the pressure reduces to the lower limit pressure, the motor will
automatically operates according to its starting process, then reciprocating and cycling in this way.
c). Manually uploading or unloading at the automatic status.
At the automatic status, the equipment is unloading, so press the key “↓↑”to load. If the pressure higher that the
unloading pressure, load the electromagnetic valve and jog for one time to return to the unloading status; If the
pressure lower than the unloading pressure, load the electromagnetic valve to get electricity until the air supplying
pressure bigger than the unloading pressure and return to the unloading status. When the equipment is at the
loading status, press the key“↓↑”to do unloading, if the pressure higher than the loading pressure, load the
electromagnetic valve to loss electricity until the air supplying pressure lower than the loading pressure and return to
the loading status; if the pressure lower than the loading pressure, unloading doesn’t work at this moment.
d). normal breakdown
When press the key “O”, the loading electromagnetic valve loses electricity while the unloading
electromagnetic valve gets electricity. After delaying for some time, the motor contactor loses electricity and motors
of the main engine and fan stop works, and after restarting and delaying, the unloading electromagnetic valve loses
electricity. Restart only by pressing the key “I”.
e). control again frequent starting
Shutting down by pressing the key“O”, overlong deadhead stopping and breakdown will make the motor stop
working, during which time, we shouldn’t start the motor immediately and need to delay it for some time. At every
stopping status, the time display window countdown of the controller shows that the rest delay time for example,
90 seconds), and only when the delay time is zero, the motor can be started up.