Alink AG-10A User manual

User Manual
Air Compressor 1
Trademark & Copyright
It is the Y2019 Copy.Without approval or/and authorization, any parts of this manual should
not be copied, disseminated, recomposed, or stored into a recoverable system.
The trademarks in the products are reserved by the registered companies or persons.
Attention
Before operating the machine, you should read this manual in detail and well know the
operating regulations & techniques, in order to appropriately install, performing-adjust, operate
and maintain it.
This manual should be reserved by the end-users.
This manual should be reserved along with the accessorial docs & the machine, till it gets
scrapped.
The scope of application of this manual
This manual can be applied to the Stationary screw air Compressor AG200A（W）for their
installation, performing-adjustment, running, & maintenance.
This manual does not include the Operating Instruction of the triple-phase asynchronous
motor, which is in the accessorial electric motor manual.
This manual can be applied by the design engineer as the design literature for air compressor
plant.
Known-how before reading this manual
If you possess the professional electric-mechanical knowledge, you’ll well understand the
Manual description.
This manual is revision V1.1-2019

User Manual
Air Compressor 2
Note
(1)Before powering on the new device, make sure that the power supply you use matches the
device.
(2)After the unit is powered on, set the upper limit voltage and lower limit voltage according to
the voltage you are using. The setting method is as follows:
Password：9717
Set the value of "HIGH VOL." : "the rated voltage multiplied by 1.1" (460V×1.1=506V);
Set the value of "LOW VOL." : "the rated voltage multiplied by 0.9" (460V×0.9=414V).
AIR T：00℃000V
NORMAL STOP 0S
RUN PARA.
USER PARA.
INPUT CODE
****
FACTORY PARA.
CALBR PARA.
MOTOR CUR：000.0A
FAN CUR：000.0A
HIGH VOL.：450V
LOW VOL：380V

User Manual
Air Compressor 3
Contents
NOTE.......................................................................................................................................................................... 5
Be aware of “Attn”, “Caution” and “Danger” ......................................................................................... 5
The operation .................................................................................................................................................. 5
About the use .................................................................................................................................................. 5
Regarding the Installation............................................................................................................................ 6
Regarding the Running ................................................................................................................................. 6
Regarding the Maintenance ........................................................................................................................ 7
About oil............................................................................................................................................................ 8
Caution About oil ....................................................................................................................................... 8
1 Technical specifications ................................................................................................................................... 9
1.1 Technical Data Sheet for AG-10A ....................................................................................................... 9
1.2 Technical Data Sheet for AG-15A ..................................................................................................... 10
1.3 Technical Data Sheet for AG-20A ..................................................................................................... 11
2 Installation ....................................................................................................................................................... 12
2.1 Equipment Acceptance ....................................................................................................................... 12
2.2 Air compressor handling..................................................................................................................... 12
2.3 Installation............................................................................................................................................... 13
2.4 Electric Apparatus Installation.......................................................................................................... 14
2.5 Electric Apparatus Connection......................................................................................................... 16
3.1 System process chart .......................................................................................................................... 17
3.2 Air-Pipeline System .............................................................................................................................. 17
3.3 Lubricating oil system.......................................................................................................................... 18
4 Protection System & Alarm Device.............................................................................................................. 20
4.1 Overloading protection for Main Electric Motor & Fan Motor............................................................... 20
4.2 Protection against the machine contra-rotation........................................................................................ 20
4.3 Protection against too high air-discharge temperature........................................................................... 20
4.4 Protection against too low ambient temperature...................................................................................... 20
4.5 Protection against over air-discharge pressure........................................................................................ 20
4.6 Alarm for the Service life of lubricating oil & quick-wear Parts .............................................................. 20
5 Operation............................................................................................................................................................. 21
5.1 Initial starting & running...................................................................................................................... 21
5.2 Checking up before starting the machine ................................................................................... 21
5.3 Start up the machine ............................................................................................................................ 23
5.4 Unloading Shut-off ................................................................................................................................ 23
5.5 Running .................................................................................................................................................... 23
5.5 Solution for long-vacant machine.................................................................................................. 23
6 Maintenance and Trouble-shooting............................................................................................................. 25
6.1 Safety and Prevention.......................................................................................................................... 25
6.2 Air filter replacement & maintenance ............................................................................................. 25
6.3 Oil filter replacement............................................................................................................................ 25
6.4 Oil-air Separator Cartridge Replacement ...................................................................................... 27
6.5 Lubricating oil replacement ............................................................................................................... 27

User Manual
Air Compressor 4
6.6 Electric-Motor Maintenance............................................................................................................... 28
6.7 Maintenance items and maintenance cycle .................................................................................. 29
7 Microprocessor control system for AG-10A.............................................................................................. 30
7.1Basic Operation ...................................................................................................................................... 30
7.2 Alarm Function....................................................................................................................................... 35
7.3 Controller Protection............................................................................................................................ 36
7.4 Troubleshooting..................................................................................................................................... 36
7.5 Electric Schematic Diagram............................................................................................................... 38
8 Microprocessor control system for AG-15A,AG-20G ............................................................................. 40
8.1 Basic Operation ..................................................................................................................................... 40
8.2 Alarm Function....................................................................................................................................... 47
8.3 Controller Protection............................................................................................................................ 47
8.4 Troubleshooting..................................................................................................................................... 48
8.5 Electric Schematic Diagram............................................................................................................... 50
9 Trouble-shooting List....................................................................................................................................... 52

User Manual
Air Compressor 5
NOTE
Be aware of “Attn”, “Caution” and “Danger”
Attn
Inappropriate treatment may lead to dangerous situation,
such as the slight injuries and the device malfunction.
Caution
Inappropriate treatment may lead to dangerous situation,
such as the medium injuries and device malfunction.
Danger
Inappropriate treatment may lead to the dangerous
situation, such as the serious injuries and device damage.
Sometimes, even the inappropriate treatment or non-observance to the “Attn”, may also lead
to serious accidents. Therefore, GANEY suggests that all ALERTs in the Manual should be
observed.
The operation
Attn The operation
Operating instructions must always be available in the machine's
operating area (for example, in the tool room or in the box containing
the instructions)! In addition to the operating instructions, all
applicable laws and regulations on accident prevention and
environmental protection must be observed, and others must be
complied with.
Often check the operator's work is consistent with the operating
procedures, whether they pay attention to safety requirements.
Observe all safety notices and warning signs on the machine.
The safety instructions and warning signs posted on the machine
must always remain intact and clearly visible.
About the use
Danger
About the use
Do not apply the Machine in the sealed room, pit or channel, and do not
apply the compressed air for breath.

User Manual
Air Compressor 6
Regarding the Installation
Attn Regarding the Installation
The machine room should be well ventilated of the clean & fresh air.
Do not install the Air-compressor in the area full of aerosol or
poisonous, corrosive air.
The power cord should match the machine rating power, and the
machine should be equipped with the circuit breaker or other safety
device to ensure the electric device safe & reliable.
Dangerous Regarding the Installation
The compressor body & the Electric Motor enclosure should be
reliably grounded, and should be additionally equipped with the
Lightening inductor if necessary. The unreliable grounding may lead
to fire or injuries.
Regarding the Running
Attn Regarding the Running
If the Room temperature is below 0
℃
, to avoid the “ice-
blocking”phenomena or cold crack, the water in the 1）cooler, 2）
Oil-air Separator, & 3）pipelines, should be drained up, when the
machine is power off
Before starting the machine, be sure of nobody, no-tools or no other
articles inside the Cabinet, and shut off the door. While Starting the
machine, keep the surrounding people posted of Safety Alert
Dangerous Regarding the Running
When in initial starting or if in power cord alteration, check up if the
machine rotating direction is consistent with the arrowhead
direction.
3、The machine should not run when the Discharge Pressure is
higher than that of rating label. Or else the Electric Motor may
overload and then get burnt up.
When the Machine is in malfunction or other dangerous factor, do
not start the machine, whereas cut off the power supply and make
obvious mark.

User Manual
Air Compressor 7
The Fingers & clothes should be far away from the rotating Fan,
Drive Shaft- coupling and other heat-emitted components & parts,
such as Oil-air Separator, Pipelines.
6、While the machine is running, do not dismantle any of the
cap/cover/shelter/shield, or components & parts. The high-
temperature Liquid & the high pressure air in the machines may lead
to serious injuries or even death.
Regarding the Maintenance
Caution Regarding the Maintenance.
While in Servcing or maintenance, be aware of acute parts of the
machines, to avoid the scratch or injury.
Do not take the bare compressor or pipes as the supporting point;
and the non-observance may lead to device damage.
While the Servcing and Maintenance is completed, do clear the dust
or other trash off the machine inside & the surrounding, to better
the air quality.
Dangerous Regarding the Maintenance
Assure the power supply is off and hang up “Servcing”, “Switch-on
Forbidden” or other Caution Labels, when conducting the Servcing
or Maintenance. Or else others’ mis-operation may lead to the
maintainer’s injuries.
While in maintenance, assure the compressed air inside the
machine should have been released up, the machine should have
been segregated from other air source, and the machine should
have been cooled up.
The bare compressor assembly should be conducted by the
specialized technician with the specified tools. The end-user should
not presumptuously dismantle & servcing the bare compressor

User Manual
Air Compressor 8
About oil
Caution
About oil
Be sure to use the air compressor oil, or cause the compressor
efficiency, or even damage the compressor host.
Dispose of lubricating oil in accordance with national or local laws
and regulations. Improper handling of lubricants may cause serious
environmental pollution.

User Manual
Air Compressor 9
1Technical specifications
1.1 Technical Data Sheet for AG-10A
No.
Item AG-10A
Air
-discharge Capacity（CFM) 37.41
Air
-discharge Pressure（PSI）116
The setting pressure of the safety valve
（
Psi）130.5
Suction
Temp
（℃）0~40
Pressure
Atmospheric Pressure
compression stages
One-stage
Air
-supply Temp（℃）≤Ambient Temperature+15
Cooling Mode
Air Cooling
Outlet diameter
3/4”NPT
Oil
-content in Air（ppm) ≤3ppm
Lubricant Oil Volume
（gal）1.05
Lubricant Oil Spec.
Exclusive Lubricant for air compressor
Air
-suction adjustment Mode ON/OFF adjustment
Driving Mode
Direct connection
Electrical
Motor
Power
（HP）10
Rotating Speed
（RPM）3490
Start mode
Direct Start
Voltage
（V）/ Freq.（Hz）460/60 230/60
Max.
Current(A) 14.5 29
N/W
（lb）562
Net dimension
：L×W×H（inch）34×21.7×28.4

User Manual
Air Compressor 10
1.2Technical Data Sheet for AG-15A
No.
Item AG-15A
Air
-discharge Capacity（CFM) 44.47
Air
-discharge Pressure（PSI）116
The setting pressure of the safety valve
（
Psi）130.5
Suction
Temp
（℃）0~40
Pressure
Atmospheric Pressure
compression stages
One-stage
Air
-supply Temp（℃）≤Ambient Temperature+15
Cooling Mode
Air Cooling
Outlet diameter
1”NPT
Oil
-content in Air（ppm) ≤3ppm
Lubricant Oil Volume
（gal）1.58
Lubricant Oil Spec.
Exclusive Lubricant for air compressor
Air
-suction adjustment Mode ON/OFF adjustment
Driving Mode
Direct connection
Electrical
Motor
Power
（HP）15
Rotating Speed
（RPM）3525
Start mode
Star-delta Starting
Voltage
（V）/ Freq.（Hz）460/60 230/60
Max.
Current(A) 21 42
N/W
（lb）1080
Net dimension
：L×W×H（inch）44×24.8×35.3

User Manual
Air Compressor 11
1.3Technical Data Sheet for AG-20A
No.
Item AG-20A
Air
-discharge Capacity（CFM) 72.01
Air
-discharge Pressure（PSI）116
The setting pressure of
the safety valve
（
PSI）130.5
Suction
Temp
（℃）0~40
Pressure
Atmospheric Pressure
compression stages
One-stage
Air
-supply Temp（℃）≤Ambient Temperature+15
Cooling Mode
Air Cooling
Outlet diameter
1”NPT
Oil
-content in Air（ppm) ≤3ppm
Lubricant Oil
Volume（gal）1.58
Lubricant Oil Spec.
Exclusive Lubricant for air compressor
Air
-suction adjustment Mode ON/OFF adjustment
Driving Mode
Direct connection
Electrical
Motor
Power
（HP）20
Rotating Speed
（RPM）3525
Start mode
Star-delta Starting
Voltage
（V）/ Freq.（Hz）460/50 230/50
M
ax Current 29 58
N/W
（lb）1124
Net dimension
：L×W×H（inch）44×24.8×35.3

User Manual
Air Compressor 12
2 Installation
2.1 Equipment Acceptance
When receiving the air compressor, please carefully implement the inspection. If you do not
right away open the case, you should be aware of any (potential) damage due to the improper
handling or/and delivery; and if you find any defects or/and malfunction, you should get the
signature & confirmation from the deliverer for the incoming warranty claim.
While conducting th inspection, please kindly follow the items below:
1) Check the Rating Label, and confirm its specification.
The Model No.: Refer to Chapter 1.5 in this MANUAL
The Power Voltage: Check up if the machine matches the local power grid
The Motor Power: select the proper electric power cable
The Weight & Dimension: design the ground base accordingly.
2) Check and confirm the Appearance against any (potential) damage during the handling
or/and delivery, such as pipeline cracking, enclosure distortion, component & part damage or/and
fall-off
3) Besides the machine & its main body, you should also check and confirm the Accessories
(such as the Instruction Manual). Please follow the enclosed Packing List to check and confirm if
all accessories are full rigged.
Attn
After unpacking, please keep the user manual and other accessories.
2.2 Air compressor handling
2.2.1 Fork-lift handling method
When Fork-lift in use, the points below should be followed
(1). The load of fork-lift should comply with the machine total weight.
(2). The machine can be delivered through the fork lift holes. .
Attn
The load of fork-lift should comply with the machine total weight，or may lead
to device damage and serious injuries.
2.2.2. The machine can also be delivered by the way of rolling the wood-bar

User Manual
Air Compressor 13
2.3 Installation
2.3.1 The requirements and suggestions for the Installation Places
The Air Compressor should be installed in the clean place with enough light, good ventilation,
& large vacant space for the maintenance purpose. The good machine room is the critical factor
to properly apply the Air compressor System.
2.3.1.1 Ventilation, lighting, environmental temperature, maintenance space
1) Due to large amount of heat yielded during the running, the Air Compressor should be
positioned in the room with good-ventilation, and the air inlet in the machine for cooling purpose
should be enough.
2) The Installation place should be in good lighting, each side of the machine should be over 1.5m
far from the wall, top space should be over 2 m from the ceiling; especially the top space for Air-
cooling System should be over 4 m from the ceiling, in order to be convenient for the operation
and maintenance.
(3). The environmental temperature should be lower than 40 ℃, in order to prevent the machine
from the high-temp shuts-off, due to the high temperature. Also the higher the environmental
temperature is, the less air the machine outputs. Meantime, the environmental temperature
should be beyond 0 ℃, in order that it should be beyond the condensation point of the water &
lubricating oil.
(4). The ambient environment should be taken into the consideration. The machine room for the
Air Compressor should be in relatively low humidity /moisture, without dust, chemicals, paint odor
or painting operation. If the operating environment is harsh, the Suction inlet of the machine
should be additionally equipped with the filter device, for example to apply a ventilation pipe to
guide the suction inlet to the relatively clean air.
2.3.2.1 The requirements of foundation
The air compressor should be installed to where the cement ground can hold the high-weight
of the machine. The ground should be leveled and well-pressed and the machine should be
installed levelly. If there is outside vibration, the vibration-preventive flute should be applied. The
bolt dimension should refer to the system Appearance Illustrative. In order to well connect all the
inlet-outlet pipelines, the length & width of the cement platform should be bigger by 100mm than
that of the machine, and the height of the cement platform should be bigger by 150 mm that the
ambient ground. Also the trench should be excavated around the Platform periphery, so that the
oil & water can flow away through the trench when the machine shuts off for the oil-replacement
or servcing.
2.3.2 Pipeline Installation
2.3.2.1 When the main pipelines are installed, they should be in 1°~2° inclination in order to lead
the condensed water out of the pipes.
2.3.2.2 The pipe diameter should be at least equal to the machine discharge pipe. The pressure
drop in pipeline should be not more than 5% of set pressure. The Pipe bends & any kinds of valves
should be minimized in order to reduce the pressure loss.
2.3.2.3 The main pipeline should not be downsized presumptuously, and if the pipeline has to be
downsized or extented, the reducing pipe should be applied; otherwise there may be mixed flow
at the joint, which will bring great pressure loss & greatly affect the pipe life.

User Manual
Air Compressor 14
2.3.2.4 If the air consumption in the Air System in very short time, a buffer tank should be applied
to minimize the frequent loading & unloading to extent the machine service life.
2.3.2.5 When several Screw air Compressor share one discharge pipe, each machine should
install ball valve to their respective Discharge pipe for segregation purpose. If a single screw
machine and a reciprocating air compressor are converged together, an air tank should be
installed between two machines. After the Air tank is installed, a cut-off valve & a Pressure-relief
valve should be installed between the air collector and the machine (When the machine shuts off,
the compressed air between the ball valve & pressure minimum valve in the system can be
discharged).
2.3.2.6 The auxiliary pipe should be connected from the main pipe top to prevent the condensed
water from dripping to the working machine, the Overflow valve should be installed on the
compressor pipes.
2.3.2.7 If the compressor machines are equipped with the Air collector & the dryer, the best layout
is the air compressor + the air collector + the dryer.
2.3.2.8 The ideal pipeline layout should be that the main pipe surrounds the whole factory building,
and any position requiring the compressed air, can obtain the compressed air from at least 2
directions. The Circular Main pipeline should be equipped with certain of proper valve to cut off
the air supply source while in maintenance.
Air compressor Air collector
C level-
precision filter Air drier
T level-
precision filter
Air outlet
Fig.2-1 air compressor, air collector and air drier
2.3.3 Cooling system
（1）Assure the ambient environment in good ventilation and do not place the air compressor
near the high-temperature machinery or place it to an air-tight room.
（2）Assure to periodically clear the dust in the heat-exchanger fins. Air cooler should be cleaned
periodically to prevent the unit from stopping at high temperature.
Attn
The windshield shall be installed so as to prevent outdoor dust and rain from
pouring into the cooler of the air compressor.
2.4 Electric Apparatus Installation
2.4.1The Circuit breaker (Air Switch) Installation
(1) Low-voltage Circuit Breaker is to cut off the machine power supply, & protect the Motor.
According to the rating current of the Motor, select proper circuit breakers. The Circuit breaker
should possess of the function of the Motor overload protection & automatic circuit break against

User Manual
Air Compressor 15
the current leakage.
(2) The well-equipped Circuit breaker should be of Motor-protective, and its setting value for the
instantaneous operation is by 8-10 times larger than Motor rating current value. Please try to avoid
the Circuit Breaker of Normal On-off type; and if the normal on-off type is applied, its setting
value for the instantaneous operation is 14 times larger than Motor rating current, or else the
circuit breaker may false operate while the motor is started.
(3) The circuit breaker should be installed besides the air-compressor machines for the
convenience of the maintenance purpose. And the installation process should comply with the
Safety regulation.
2.4.2The Electric Power Cable Installation
Select the proper electric power cable according to the rating voltage & current of the Air
compressor machines. Also the proper cable should be determined by the other factors, such as
the environment, the cable routing and the product specification. And the following principles
should be observed:
(1) In order to minimize the environmental pressure, the electric power cable should be under
earth or covered in the earth-pipe. The routing for the plastic-jacketing cable should be applied
with the earth-pipe.
(2) Low-Voltage Power cable should be in quadded electric power cable, and select the
proper jacketing according to cable routing.
(3) If the environmental temperature is high, the cable section should be properly extended.
And if the routing distance is long, the cable section should be also properly extended in order to
reduce the voltage drop.
The low-voltage electric cable in table below is BV-type polyvinyl chloride cable. If select
other type Electric Cable, please follow the principles above to select the proper ones. And if the
user has no experience, please consult with the Cable manufacturer.
Item
Type
Motor Power Circuit-breaker Current
（A）
Power（HP
）
Max Current（A
）
Voltage（V
）
Frequency（Hz）
AG-10A 10 28.12 230±10% 60±5% 50
AG-10A 10 14.20 460±10% 60±5% 25
AG-15A 15 41.3 230±10% 60±5% 32
AG-15A 15 20.6 460±10% 60±5% 32
AG-20A 20 32 230±10% 60±5% 60
AG-20A 20 32 460±10% 60±5% 60
The Current parameter in the table is only for reference, the actual value should be subjected to
the rating label of the product.
Danger
Do not apply the cable with too small section, or else the high temperature
will lead to the danger.
Do not apply the cable un-matching the required voltage, or else it will lead
to the serious hazard, such as the fire, the electric shock and so on.
2.4.3 Electric Power Requirement
The Electric Power Supply should match the rating voltage and frequency of the Air compressor.
The Power-supply voltage should:
（1）The voltage should not great fluctuate, the fluctuation range should be in -10%~+10% of the

User Manual
Air Compressor 16
Motor Rating Voltage.
（2）The Voltage Unbalance should not be great, and the triple-phase-voltage unbalance in the
triple-phase power supply should not be beyond 5%. If it fluctuates greatly, the power supply
should be equipped with the Stabilizer or the power grid should be adjusted.
（3）The Capacity of the Power grid should fulfill the Motor start; or else the motor will be hard
started, or even the circuit breaker will trip out.
（4）The Air compressor should have single power supply system for the convenience of
maintenance.
Danger
Do not apply the high-voltage power supply to the low-voltage device, or
else it will lead the damage to the device & the injury to man.
2.4.4 Grounding
The Main body of the Air compressor & the Motor enclosure should be reliably grounded, to
prevent the Oil-air Separator from the firing due to the static electricity, & avoid the electric
leakage.
The Main body of the Air compressor & the Motor enclosure should be connected to the
grounding conductor by the PE-Grounding wire or the galvanizing round (flat) steel, to assure its
section accord with the relevant requirement.
Danger
Unreliable grounding or un-grounding may lead to the serious damages,
such as the firing and electric shock
FORBID taking the gas pipeline or water pipeline as the grounding
conductor, or else it will lead to serious damage.
DONOT connect the earthed neutral conductor of the triple-phase power
supply to the air-compressor enclosure or the grounding conductor, or
else it will lead to the device malfunction
2.5 Electric Apparatus Connection
Caution
The Wiring Operation should be conducted by the Electrician qualified
with the Electric Operation Certificate.
2.5.1 The Cable connection from the Power supply to the Air-compressor’s control cabinet
If the controlling cabinet is applied with the triple-phase alternated power supply AC 415V
(~3xL), the connecting cable will refer to the table of Item 2.6.2; The Electric Power will be
connected to the Air-compressor’s Input Terminals via the circuit breaker.
Caution
The Cable connection should be firm & not loose, or else the components
& parts may get burnt or even the firing occurs due to the cable heating.
2.5.2 The grounding-wire connection
Connect the right side Earthing terminals of Air Compressor to the Grounding conductor.
After the grounding process, apply the Earthed Resistance Detector to measure the earthed
resistance, and the resistance should be lower than 4 Ohm.

User Manual
Air Compressor 17
3 System process and Part Function
3.1 System process chart
Pt1
P1
Exhaust pressure
Air outlet
Air cooler
Oil cooler
Thermostatic valve
Oil filter
Oil-air separator
Sewage outfall
Exhaust gas
temperature
Three-phase
asynchronous
motor Bare
compressor
Electromagnetic valve
Vent
valve
Throttle
valve
Filter
Safety
valve
Min. pressure valve
Air filter
Air inlet
Air
Oil air-
Oil
Control pipe
Compressed air
Unload valve
Fig.3-1 System process chart
3.2 Air-Pipeline System
Air-Pipeline system consists of Air Filter, Unloading Valve, Bare compressor, Discharge
check valve, Oil-air Separator, Min. pressure valve, Rear cooler, Air pipes etc.
Fig.3-2 Air-pipeline flow chart
Air penetrates filter for dust removal, then get through Unloading Valve, enter in Air Inlet; and the
Air is compressed inside the bare Compressor, then discharged from the air-outlet, next puts
through the discharge check valve & discharge pipe, and finally enters into Oil-air Separator. The
compressed air with oil content rotates & centrifugally separates up inside the Oil-air Separator,
and the lubricating oil aggregate on the cavity wall by the centrifugal force, finally drips into the
oil tank. After the centrifugal separation, the compressed air then enters into the Oil-air Separator
Cartridge to conduct the meticulous separation. The meticulously separated oil aggregates in the
Cartridge bottom; due to the Cartridge inside installed with an oil-return pipe, the oil in the bottom
under the pressure will get through the oil-return pipe then into the Main suction pipe. With twice
separation, the compressed air will be very clean, and the compressed air from the Separator,
then get through the Min. Pressure Valve & Cooler for oncoming use.
3.2.1 Air filter
Air Filter
Unloading Valve
Air
Bare compressor
Air
Oil-air Separator
Air&Oil
safety
valve
Min. pressure valve
Air
Rear cooler
Air
Air pipes
Air

User Manual
Air Compressor 18
Air Filter mainly clears the dust air to avoid the quicker abrasion of Bare Compressor’s screw
& bearing, and the being-block phenomena of Oil filter & Oil-air Separator Cartridge. Generally
the Air filter should be cleared off every 500 hours by the way of blowing off the dust from its
inside to outside by the low-pressure air. The cleaning cycle should be shorter under the more-
dust Area.
3.2.2 Unload valve
There is 2 main functions for the unloading valve: 1). when the compressor is started &
unloaded, Suction-valve plate will be shut down by the unloading valve, so that the compressor
can be started under low current, and run under no load while unloading. 2). While loading, the
suction-valve plate is opened by the unloading valve to make suction air equivalent to the actual
air exhaustion.
3.2.3Oil-air Separator (details given should refer to the latter chapter)
3.2.4Min. pressure valve
Min. pressure valve is positioned at the outlet of Oil-air Separator, its opening pressure is
about 65.3Psi, and it mainly functions for:
（1）When starting, the prior Cycling Pressure that lubricating oil requires of, is set up to assure
the inside machine well lubricated.
（2）When the pressure exceeds 65.3Psi, the opening valve will lower air Rotating Speed that
pass through the Oil-air Separator, which not only assure Oil-air of high separating rate, but also
protect Oil-air Separator Cartridge from damage aroused of too big pressure difference.
（3）It can protect the system from pressure reflux when the idling compressor discharges the
a i r.
3.2.5 Rear cooler
Air cooler sucking in cold air by cooling fan, cools the compressed air. Since the air-cooling
air compressor is sensitive to the ambient temperature, it should be positioned where is well
ventilated.
3.2.6Safety Valve
Safety Valve: The valve will be started to discharge the pressure, when the air outlet pressure
of Oil-air Separator exceeds the rating air discharge pressure by 1.1 times or +14.5Psi, aroused
from the improper adjustment or failure of Pressure Switch.。
Danger
When the Discharge Valve is started, the Segregator Cartridge should be
replaced. If not, the Electric Motor will be overloaded in the Current, and
then get damaged
3.3 Lubricating oil system
3.3.1 Lubricating oil flow chart（pic3-3）
Lubricating oil of single screw compressor possess of 4 main functions: lubricating the
contact surface between bearing & screw, sealing the clearance between gears, cooling
compressed air, and lowering down noise. Lubricating oil in Segregator cartridge is pressed into
Oil Cooler by high pressure and then cooled. Then the lubricating oil passes through the Oil Filter
(to clear off the dross & fouling), and finally enters into the Bare Compressor.

User Manual
Air Compressor 19
Fig.3-3 Lubricating oil flow chart
3.3.2Oil filter
The Oil Filter is a kind of paper filter, and its function is to clear the dross off oil, such as the
worn metal particle, dust, oil compound etc. Oil Filter’s filter finenes is between 10μ～15μ, and it
can well protect the Bearing & Screw. When the new machine runs of accumulative 500 hours,
the lubricating oil and Oil filter should be replaced, and then the replacement should follow the
Indicative Alert of the Filter’s Timer. If the Oil filter is not replaced due to the great pressure
difference, it will lead to insufficient oil-feeding, & high-temp shut-off. Meanwhile, the insufficient
oil-feeding will shorter the Bearing’s service life.
3.3.3Oil cooler
The Oil Cooler Fins of Air-cooling Compressor was coated with dust, which will influence
cooling efficiency, and too high Discharge Temp will lead to system shut-off. Therefore, the dust
on Oil-cooler surface should be periodically cleared off by the compressed air.
3.3.5 Oil-air Separator
The Segregator possess of functions of oil storage & oil-air segregation. Its flank is equipped
with an Oil Gauge. When the machine is on, the Lubricating oil level should point to the median
line’s vincity of Oil gauge. The Oil tank is also equipped with Oil in-take for oil-feeding. The
segregator bottom is installed with Oil-discharge Valve. In damp season, before starting the
machine, do turn on the Oil-discharge valve to drain up the condensation water at the Segregator
bottom, otherwise, the lubricating oil may get emulsified. The oil spray in the compressed oil can
be nearly completely cleared off when it passes through the Segregator Cartridge, and the Oil
content will be lower than 3ppm. The oil filtrated by the Cartridge is aggregated at the Cartridge
bottom, and then it will get through the Oil-return pipes, the Filter, the throttle Orifice, & the Oil
immersion Lens, and finally reflux to the bare compressor.
Caution
Recommend the user not to apply other-brand lubricating oil, and the
inferior may damage the Air compressor
Oil
Oil
Bare compressor
Oil-air Separator
Temperature control valve
Oil cooler
Oil filter
Oil&Air
Oil
Oil