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DRS SERIES OIL-LESS AIR COMPRESSOR
OPERATION MANUAL
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PREFACE
Thank you for purchasing a air compressor. This
manual introduces our DRS Series air-cooled oil-less air compressors
to the user all the information required to install, commission and
operate compressors and carry out the regular schedules for servicing
and maintenance which ensure the most efficient and trouble-free
operation while the compressor begins to run.
The conditions of warranty are set out from the distributor supplying
the machine. In the event that the product has been tampered with,
repaired with parts not manufactured by Tong Cheng, serviced by
unauthorized personnel, or where recommended maintenance
procedures have not been followed, the warranty will be waived
automatically.
This compressor is intended for compressing atmospheric air only
and strictly prohibit from compressing any other gas.
“SWAN” compressor incorporates the latest design technology and
use only components selected for their quality and durability to ensure
more efficient and durable operation.
We constantly strive to meet high quality and durability standards
and reserve the right to change specifications if required. Thank you
again for your continuous support. We hope to serve you again soon.
“Proper Maintenance Leads To Long Service Life”
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INDEX
I. Features------------------------------------------------------3
II. Description & function-------------------------------------4
III. Installation and precautions-------------------------------5
IV. Operation----------------------------------------------------6
V. Maintenance-------------------------------------------------6
VI. Trouble shooting--------------------------------------------8
APPENDIX I. Air compressor configuration----------------------10
APPENDIX II. Electric circuit diagram-----------------------11
APPENDIX III. Air flow diagram-----------------------------12
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I. Features
1. DRS series air compressor pump
1-1. High quality components. Reliable and easy
maintenance.
1-2. Low noise, high efficiency filter to reduce noise.
1-3. Equipped with anti-vibration pad to achieve low
vibration.
1-4. High efficient motor with built-in over-heat
protector inside.
1-5. Air discharge tube is made of stainless steel.
2. Components of control system
2-1. Reliable components: pressure switch, check valve,
pressure gauge, solenoid, safety valve.
3. Air tank
3-1. Inner surface is coated with epoxy to avoid rusting
(optional).
3-2. Made of high strength steel and
designed in accordance with ASME standard.
3-3. Equipped with safety valve to ensure safe
operation.
3-4. Powder painting to create exquisite appearance
and hard finish for long lasting.
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II. Description & function
NO.
Name Description NO. Name Description
1
Pressure
switch
Pressure control,
Leveling rod to ON/OFF
the unit manually.
7 Drain valve
Drain water when tank pressure
under 1 kg/cm2G.
Close—clockwise
Open—counter clockwise
8 Motor Built-in over-heat protection.
2
Tank
pressure
gauge
Indicate air tank pressure.
3
Safety
valve
Tank over-pressure
protection.
9 Air tank Store compressed air.
4
Quick
Coupling
Discharge outlet
10
Electric cord
(plug)
Ensure correct voltage adopted.
Ensure plug & earth wiring are
properly installed.
11
Air pressure
regulator
Adjust the outlet pressure
5
Solenoid
valve
Power off, air discharge,
unloading start.
6
Check
valve
To avoid compressed air
return back.
12
Outlet
pressure
gauge
Pressure indication after adjusting
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III. Installation and precautions
1. Installation essentials
1-1. Please install the unit in position where it is easy
to do maintenance and good ventilation.
1-2. Do not install in damp or dusty places.
1-3. Install on flat and firm ground to prevent from
slipping.
2. Electric wiring
2-1. Ensure the voltage and frequency is correct.
2-2. For safety reason, always follow electricity
instructions, and equipped with NFB (Non Fuse
Breaker).Besides, the power voltage should not be
lower than 90% of the required standard voltage.
2-3. The joint of power supply should be fixed firmly
to avoid any disconnection and break down.
3. Protection points
3-1. The unit is equipped with pressure switch to avoid
pressure too high: when air tank pressure reaches
to the upper pre-set value, the pressure switch will
cut-off the motor power to stop operating the unit.
(stand-by condition).
3-2. When the unit is in stand-by condition and air
pressure drops to the pre-set lower value, the
pressure switch will resume to “ON”, and the
motor will re-start to operate.
3-3. Safety valve is fitted to prevent over-pressure;
over-temperature protection is equipped to protect
the motor.
3-4. While abnormal high temperature occurs, the
motor protection switch will be actuated to shut
off the motor and stop running the unit.
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Please power off the unit and check. Restart the
unit after trouble-shooting.
IV. Operation
1：：：： Check before start
1-1. Make sure if power source and electrical
connections comply with local electrical
regulations, equipped with NFB (Non Fuse
Breaker) and earth wiring.
1-2. Check set bolts and nuts if looseness.
1-3. Check if electrical cables are correct.
1-4. Check if voltage is correct.
2：：：： Check under operation
2-1. Check if compressed air pressure rises normally.
2-2. Check if loading current of motor remains in
standard level.
2-3. Check if all safety device work properly by hand.
2-4. Never touch cover under operation. Stay away
from high heat components, motor, and fan to
avoid injury.
2-5. For long lasting life, the rate of loading cycle is
suggested to be not over 70%.
V. Maintenance
1：：：： Daily maintenance
1-1. Release water from air tank after daily use.
(Please implement under 1kg/cm².G)
1-2. Check if compressed air pressure rises normally in running.
1-3. Clean compressor cover on both sides to
always keep inlet valve clean.
1-4. Check if abnormal sound or vibration happens.
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1-5. Check if voltage & current of the power supply to
the motor are normal.
1-6. Check and clean impurities from inlet
filter element every month (300 hours).
2：：：： Periodically maintenance
Item Weekly Monthly Yearly 2 Year
Air tank drain
valve
○
Check and clean
inlet air filter
element
○
◎
Check and clean
the ventilation
area of the unit
○
Check pressure
switch and safety
valve
○
Check compression
ring and cylinder
○
◎
Check the valve
assembly
○
◎
Remark : ○Check/Maintain, or Renew if necessary.
◎
Renew.
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VI. Trouble shooting
Troubles Possible Causes
Action
Check Repair Renew
On
Running
Pressure
cannot be
raised
properly
Compression ring is worn-out
V V
Cylinder is worn-out
V V
Valve assy. Or gaskets leaking
V V
Drain valve leaking
V V
Intake air filter is blocked
V V
Pipe leaking
V V
Defective pressure gauge
V
Solenoid valve leaking
V V
Safety valve leaking
V V
Abnormal
pressure
Defective pressure gauge
V
Pressure switch worked
improperly
V V
Defective solenoid valve
V V
Abnormal
noise
Piston ring is worn-out
V V
Defective valve assy.
V V
Fixing bolts loose
V V
Air Filter loose
V V
Abnormal
vibration
Connecting rod vibration
V V
Defective bearing
V V
Crankshaft loose
V V
Fixing bolts loose
V V
Uneven foundation floor
V V
Defective anti-vibration pads
V V
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Troubles Possible Causes
Action
Check Repair Renew
On
Running
Abnormal
temperature
Low voltage
V V
High ambient temperature
V V
Ventilation blocked
V V
Valve assy. broken
V V
Bearing broken
V V
Fault motor
V V
Connecting rod loose
V V
Crankshaft loose
V V
Unable
to start
Motor fail
to start
Low voltage
V V
Capacitor broken
V V
Electric wiring is loose
V V
Motor current protector
jumped-out
V V
Fault motor
V V
Bearing broken
V V
Fuses burned out
V V
Defective pressure switch
V V
Solenoid broken
V V
Abnormal
motor
sound
Low voltage
V V
Check valve leaking
V V
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APPENDIX I. Air compressor configuration
Compressor unit
1
2
3
Wheel
4
Safety valve assembly
Air receiver
Description
NO NO
8
9
10
5
Drain valve assembly
Check valve assembly
6
7
Pressure gauge
Cable with plug
Pressure switch
11
Hose
12
Solenoid valve
13
Anti-vibration pads
Description
1
13
4
14
8
9
12
5
2
11
6
3
7
10
15
14
15
Pressure regulator
Pressure gauge (Outlet Pressure)
Quick coupling (Air outlet)
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APPENDIX II. Electric circuit diagram
Symbol
Description
P.S
SV
Pressure switch
Solenoid valve
MC
Compressor motor
C
Motor capacitor
Over-heat protector
F
PE
Earth wire
L1,L2
Electric cord
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APPENDIX III. Air flow diagram
Inlet air filter
SF
M
COMP
Compressor unit
SOL.
Solenoid valve
Motor
Description
Symbol
SV
PG.1
CV
Air tank
Check valve
AT
PS
Ssfety valve
Pressure switch
DV
BV
PR
Description
PG.2
QC
Pressure regulator
Pressure gauge (Outlet)
Quick coupling
M
空氣
入口
空氣
出口
SOL.
SF
COMP.
CV
AT
SV
PS
PG.1
DV
PG.2
QC
PR
Symbol
Pressure switch
Drain valve
Ball valve
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TONG CHENG IRON WORKS CO., LTD.
No.16 Ta Chin St., Sec.2 ,Taichung, Taiwan.
Tel: 886-4-22612135
Fax: 886-4-22628246
Web site: www.swanair.com.tw
E-mail: swantc@swanair.com.tw
M01865H300E(A)
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