3. Mini Screw Manual Jan2005

7/30/2019 3. Mini Screw Manual Jan2005

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COAIRE M-Ser i es

EXTROLLER Control System

MAINTENANCE MANUAL

ANDPARTS LIST

MODELCHSA-7.5M CHSA-10MCHSA-15M CHSA-20M

SERIAL NO. :

MODEL NO. :

MODEL CHSA-15CHSA-20MCHSA-25M

CHSA-30M

COAIRE TECHNOLOGIES, CORPORATION

All rights reserved Printed in U.S.A.

ROTARY SCREW AIR COMPRESSORS

For proper and safe use of the compressor, please follow all instructions and safety precautions as identified inthis manual, along with general safety regulations and practices.


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SAFETY AND PRECAUTIONSBefore you install the air compressor you should take the time to carefully read all the

instructions contained in this manual. Electricity and compressed air have the potential to causesevere personal injury or property damage. Before installing, wiring, starting, operating ormaking any adjustments, identify the components of the air compressor using this manual as a

guide. The operator should use common sense and good working practices while operating andmaintaining this unit. Follow all procedures and piping accurately. Understand the starting andstopping sequences. Check the safety devices in accordance with the following procedurescontained in this manual. Maintenance should be done by qualified personnel, accurately withproper tools. Follow the maintenance schedule as outlined in the manual to ensure problem

free operation after start up.

SAFETY PRECAUTIONSBEFORE INSTALLING THE COMPRESSOR OR PERFORMING ANY MAINTENANCE READ THIS MANUAL

CAREFULLY.

WARNINGSCOMPRESSED AIR AND ELECTRICITY ARE DANGEROUS. BEFORE DOING ANY WORK ON THIS UNIT, BE SURE THEELECTRICAL SUPPLY HAS BEEN SHUT OFF(LOCKED AND TAGGED) AND THE ENTIRE COMPRESSOR SYSTEM HASBEEN VENTED OF ALL PRESSURE.1. Do not remove the cover, loosen or remove any fittings, connections or devices when this unit is operating or in

operation. Hot liquid and air that are contained within this unit under pressure can cause severe injury or death.2. The compressor has high and dangerous voltage in the motor, the starter and control box. All installations must be in

accordance with recognized electrical procedure. Before working on the electrical system, ensure that the system'spower has been shut off by use of a manual disconnect switch. A circuit breaker or fuse switch must be provided inthe electrical supply line to be connected to the compressor. The preparation work for installation of this unit mustbe done in suitable grounds, maintenance clearance and lighting arrestors for all electrical components.

3. Do not operate the compressor at a higher discharge pressure than those specified on the compressor nameplate. Ifso an overload will occur. This condition will result in electric motor compressor shutdown.

4. Use only safety solvent for cleaning the compressor and auxiliary equipment.5. Install a manual shut off valve(isolation type) in the discharge line for service work.6. Whenever pressure is released through the safety valve during operation, it is due to excessive pressure in the

system. The cause of excessive pressure should be checked and immediately corrected.7. Before doing any mechanical work on the compressor,

a) Shut down the unit.b) Electrically isolate the compressor by use of the manual disconnect switch in the power line to the unit. Lock and

tag the switch so that it cannot be operated.c) Release all compressed air within the system and isolate the unit from any other sources of air.

8. Allowing the unit lubricants to enter into the plant air system must be avoided at all times. Air line separators, whichare properly selected and installed, can reduce any liquid carry-over close to zero.

9. Before starting the compressor, the maintenance instructions should be thoroughly read and understood.

10. After maintenance work is completed, covers must be securely closed.11. For questions contact your distributor before proceeding.


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STATEMENT OF WARRANTY TERMS & CONDITIONS

COAIREs screw air compressors are warranted to be free of defects in materials and workmanship under proper use,installation, and application. This warranty shall be for a period of 15 months from date of shipment from our factory orother stocking facilities or 12 months from date of installation. Proof of installation date will be required. All aircompressors outside the U.S. and Canada carry a parts only warranty.

ALL FREIGHT DAMAGE CLAIMS ARE NOT THE RESPONSIBILITY OF THE MANUFACTURER AND ARE NOTCOVERED UNDER WARRANTY AS ALL PRODUCTS ARE SHIPPED F.O.B. SHIPPER.

PLEASE DIRECT ALL FREIGHT CLAIMS TO THE SHIPPER IN QUESTION.

MAINTENANCE AND ADJUSTMENTS

ADJUSTMENTS PRESSURE SETTINGS AND MAINTENANCE OF FLOAT AND AUTOMATIC DRAINS AND OILCOOLER COILS ARE CONSIDERED TO BE ROUTINE MAINTENANCE AND THEREFORE NON-WARRANTABLEITEMS AND ARE THE SOLE RESPONSIBILITY OF THE END USER. CONSULT THE INSTALLATION,OPERATION AND MAINTENANCE MANUAL FOR THE ADJUSTMENT AND MAINTENANCE PROCEDURES.

This warranty does not apply to any unit damaged by accident, modification, misuse, negligence, or misapplication.Damage to heat exchangers by exposure to ammonia, any other corrosive substance or sub-freezing environment willbe considered misuse.

Any air compressors part or material found defective will be repaired, replaced or refunded, at the sellers option free ofcharge, provided that COAIRE is notified within the above stated warranty period. All returns of allegedly defecti veequipment must have prior written authorization. Said authorization may be obtained through our air compressorservice department. All air compressors, parts, materials must be returned freight prepaid to the Manufacturersfactory within 30 days of return authorization date. Any shipment returned to the factory collect will be refused.

If an item is found to be warrantable, the repaired item or replacement will be returned normal ground freight prepaidwithin the continental United States and Canada. Expedited shipment costs are the responsibility of the requestor.

Any replacement part or material is warranted only to the extent of the remaining warranty period of the air compressoror to the extent as provided by the supplier, whichever is longer.

Identification PlateThe identification plate is located on the side of the air compressor and shows all the primary data of the machine. Uponinstallation, fill in the table on the previous page with all the data shown on the identification plate. This data shouldalways be referred to when calling the manufacturer or distributor.The removal or alteration of the identification plate will void the warranty rights.

DISCLAIMER

The warranty does not cover any responsibility or liability for direct or indirect damages to persons, or equipmentcaused by improper usage or maintenance, and is limited to manufacturing defects only. Refer to COAIRE Warrantypolicy manual for travel, mileage and special charge considerations. The warranty will be immediately voided if thereare changes or alterations to the air compressor.

WHO TO CONTACT IF YOU HAVE A WARRANTY CLAIM:

COAIRE Technologies, Corporation Phone (562) 463-3935

Fax (562) 463-4928

All freight damage claims should be fil ed within 15 working days and should be directed to the carrier.


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TABLE OF CONTENTS

Chapter . General information

1-1. Instruction .............................. ................... ........................................ ................... ....................................... 1

1-2. Screw compression process .............................. ....................................... ........................ ........................ 1

1-3. Compressed air flow .............................. ..................... ......................................... .......... ........................... 2

1-4. Cooling air flow ................................... ....................... ......................................... ............. ......................... 2

1-5. Oil separation .................................... ................... ....................................... ............... ............................... 2

1-6. Oil flow .................................... ................. ....................................... .................. ................................... ..... 2

1-7. Oil scavenge flow ........................... ...................... ..................................... ............... ................................ 2

1-8. Standard Specifications ................................ .................................. ............................. ............................. 3

1-9. Installation and wiring ................................ ................................... ............................ ............................... 4

Chapter . Operating instructions

2-1. Operating panel ................................ ..................... ....................................... .............. ................................ 8

2-2. Initial start-up ........................... ........................ ..................................... ................. ................................... 9

2-3. Daily operation .............................. .................... ..................................... ................. ................................... 9

2-4. Standard factory settings of control components ................... ..................................... ................ ............ 10

2-5. Operation and control sequence ......................... ................................. .............................. ....................... 11

Chapter . Functional Description

3-1. Compressor air-end ................................. .................... ......................................... ............ ......................... 12

3-2. Drive motor ............................... ...................... ................................... ................... ................................... ... 14

3-3. V-Belt drive .............................. ...................... ................................... ................... .................................. ... 14

3-4. Capacity control ............................ ...................... ....................................... .............. .................................. 14

3-5. Lubrication system ................................. ................. ......................................... ............. ............................. 14

3-6. After cooler/oil cooler ................................ ............................... ................................ ................................. 14

3-7. Oil separator ................................ ....................... ................................... ................. .................................... 14

3-8. Oil Filter ................................. ................. ....................................... ................... ................................ .......... 14

3-9. Thermostatic Valve ..................................... ................................ ............................... ................................ 14

3-10. Min. Pressure Valve ................................... ................................... ............................ ............................... 14

3-11. Air Intake Filter .................................... ...................................... ......................... .................................... 14

3-12. Instrument Panel ............................. ..................... ......................................... ............ ................................ 15

3-13. Starter and control box ............................... ................................... ............................ ............................... 153-14. Safety device ............................... ..................... ................................... ................. .................................... . 15

Chapter . Scheduled Maintenance

4-1. Standard maintenance schedule .......................... ....................................... ........................ ......................... 16

4-2. Control of lubrication ................................. ................................ ............................... ............................... .... 17

Chapter . Trouble shooting

5-1. Trouble symptoms and solutions ......................... ................................ ............................... ........................ 19

5-2. Operation record form .................................. ............................... ................................ ................................ 21

Chapter . Corrective maintenance

6-1. Oil filter ........................................ .................... ................................... ................ ..................................... .... 22

6-2. Suction filter ............................... ................... ..................................... ................. ..................................... .. 23

6-3. Oil separator element .................................. ................................... ............................ ................................. 23

6-4. Oil seal ...................................... ................ ....................................... ................. .................................. ......... 23

6-5. Min. Pressure valve ................................... ................................... ............................ .................................. 24

6-6. Suction control valve ................................. ................................... ............................ .................................. 24

6-7. Cooling fan ............................... ..................... ..................................... .................. ................................... ..... 24

6-8. Oil temperature regulating valve ....................... ................................... ............................ .......................... 24

6-9. V-Belt ................................ ..................... ..................................... ...................... ............................... ........... 25

6-10. Pressure transmitter ................................. .................................. ............................. ................................ 26

6-11. Safety valve ................................. ..................... ................................... ................. ..................................... 26

Appendix

A. Compressor Part List ............................... .................. ......................................... ............. .............................. 27

B. Parts List ................................. .................. ....................................... .................. ................................. .......... 30

C. Wiring Diagram .................................. ..................... ......................................... ............. ................................. 38

D. Outline Drawing ......................................... ................. ......................................... ............. ............................... 39


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1

CHAPTER IGENERAL INFORMATION1-1. INSTRUCTION. COAIRE screw air compressor unit is a complete package type driven by an electric motor.

It is single stage, oil injected, rotary screw type with all components full piped, wired and mounted on acommon base; it is a very self-contained air compressor package.

1-2. SCREW COMPRESSION PROCESS

1-2-1. SUCTION PROCESS. Along with the rotation of the rotor, air isadmitted fully into the void of two rotors through the suction port. The void is

then isolated from the suction port with the casing wall, thereby completing thesuction process.

Fig 1-1. Suction Process

1-2-2. COMPRESSION PROCESS. The air in the void is compressed as themale rotor lobe meshes between the female rotor lobes and squeezes the airagainst discharge cover.

Fig 1-2. Compression Process

1-2-3. OIL INJECTION PROCESS. As pressure builds, oil is injected into thecompression area and onto the bearings, and shaft seal, serving to lubricate,absorb compression heat and seal the rotors.

Fig 1-3. Oil Injection Process

1-2-4. DISCHARGE PROCESS. Compression continues as the rotor rotates.When the void comes to the discharge port provided in the discharge chamber,the compressed air is discharged through the port. While this process isoccurring with one inter-lobe space, the other spaces are following the samecycle. Therefore, air is compressed continuously.

Fig 1-4. Discharge Process


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1-3. COMPRESSED AIR FLOW. The panel has an intake duct through which air is drawn into the enclosure.Airflows through an air intake filter, intake silencer and suction control valve to the air-end suction port. Airthen is compressed by the rotation of the male rotor, and oil is injected into the air-end during compression

process. The injected oil performs various functions, such as, sealing, cooling as well as lubricating. The air/oilmixture leaves the air-end through the discharge port and flows into the oil separator where the oil is separatedfrom the compressed air. Compressed air leaves the oil separator, and is supplied to discharge connection of theunit via minimum pressure valve, after-cooler and liquid separator.

1-4. COOLING AIR FLOW. The air-cooled unit comprises a forced ventilation system with a cooling fan, whichis driven by an electric motor. First, the cooling air removes the heat generated from the main motor, air end,etc. The cooling air is then forced into the oil and after-cooler by cooling fan. After the heat exchange, the hotair flows through the ventilation duct and is exhausted from the ventilation louvers in the panel.

1-5. OIL SEPARATION.Primary separation: Most of the oil is separated from air by the impact at the inner wall of the oil separator andby the fluid cyclonic effect. After primary separation, the heavy oil falls and is collected in the oil sump at thebottom of the oil separator.Secondary separation: The air, which still contains fine oil particles, flows through the oil separator elementwhere the oil forms into large particles and is collected at the bottom of the element shell. Then, clean airleaves the oil separator.

1-6. OIL FLOW. The oil, which is collected in the oil sump at the bottom of the oil separator, is circulatedthrough the lubrication system by the pressure differential existing between the oil separator and the air-end.The oil temperature control valve is a bypass valve. When the oil is cold, the oil bypasses the oil cooler partly orcompletely and is sent to the oil filter. When the oil is hot, 185 F(85C) or more, the oil flows into the oil cooler

unless by-pass, the compression chamber and lubrication parts of the air-end. Oil injected via the internal oilhole is provided into the intermesh among male rotor, female rotor and the rotor casing, the shaft seal, suctionside and discharge side bearings.

1-7. OIL SCAVENGE FLOW. After oil is separated from the air and collected in the element shell of the oilseparator, it is scavenged to the compression chamber of the air-end by the internal pressure differential so thatthe oil carry-over in the discharged air can be controlled within the allowable limit.


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3

M

TS PI

PT

Fig 1-5. Operating flow diagram

1-8. STANDARD SPECIFICATIONSMODEL

ITEM CHSA-7.5M CHSA-10M CHSA-15MMotor output Kw(HP) 5.5(7.5) 7.5(10) 11(15)Discharge pressure psi(g) 110 125 150 110 125 150 110 125 150Air delivery cfm 29.0 26.5 23.0 38.5 36.0 31.0 57.0 52.0 46.0Compressor speed RPM 5250 4720 4350 6950 6380 5950 6450 6200 5550Oil flow rate gpm 4.0 5.3 8.0Ambient temperature 32 115

Discharge air temperature Inlet air temperature + 27 (MAX) Driving method - V-Belt V-BeltVoltage V 3Ph(1Ph), 208-230V 3Ph, 208-230/460VFrequency Hz 60Starting method - Direct on StartOil sump capacity gal 0.7 0.7 1.1Noise level dB(A) 68 70 71Weight lbs 300 310 420Dimensions(WDH) in 1724.5/8x32.5/8 28.3/4x41.3/8x42.1/8Air outlet piping size in 3/4 1

Air

Cleaner

Solenoid

Valve

Only

15 ~ 30HP

Oil Filter

Oil Cooler

Thermostat

Valve

Oil

Separator

Min.

Pressure

After Cooler

Oil Separator

Tank

Symbol

PT : Pressure Transmitter

TS : Temperature Sensor

PI : Pressure Indicator

M : Motor


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MODELITEM CHSA-20M CHSA-25M CHSA-30M

Motor output Kw(HP) 15(20) 19(20) 22(30)Discharge pressure psi(g) 110 125 150 110 125 150 110 125 150Air delivery cfm 73.4 68.0 64.0 125.3 115.0 108.0Compressor speed RPM 8280 7900 7500 5700 5380 5160Oil flow rate gpm 8.5 11.9 11.9Ambient temperature 32 115 Discharge air temperature Inlet air temperature + 27 (MAX) Driving method - V-Belt V-BeltVoltage V 3Ph, 208-230/ 460Frequency Hz 60Starting method - Direct on StartOil sump capacity gal 1.1 1.3 1.3Noise level dB(A) 72 73 73Weight lbs 450 550 630

Dimensions(WDH) in 28.3/4x41.3/8x42.1/8 31.1/2x47.1/4x49.7/8Air outlet piping size in 1 1

1-9. INSTALLATION AND WIRING. Upon delivery, carefully check the air compressor unit(s) for damage duringtransportation.

1-9-1. HANDLING. When handling by a forklift, make sure that forks completely extend through the width ofthe unit. When handling by a shop crane, use the openings provided on common base where slings or steel wireropes can be use for lifting.

Fig 1-6. Handling by forklift truck

Fig 1-7. Handling by shop crane

1-9-2. LOCATION. The unit should be installed in a dry, well ventilated area dust-free environment. The unitshould not be installed outdoors. Consideration must be given to the need for clearance around the unit to avoidthe re-circulation of air-end for easy maintenance access.


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(Unit : Inch)

Fig 1-8. The space clearance example

CAUTION- Install the unit in a dust-free room of low humidity and on a level concrete floor.- Never install the unit on timbers or block. High humidity may result in electrical shorts and corrosion.- Dust particles containing iron or sand may result in poor resistance of the motor and air-end damage.- A ventilation fan should be provided to keep the ambient temperature 115 or lower.- operation at ambient temperature of higher than 115 may cause compressor shutdown or severedamage to the unit.

HEAT GENERATION & VENTILATION FAN CAPACITYMODEL

CAPACITY CHSA-7.5M CHSA-10M CHSA-15M CHSA-20M CHSA-25M CHSA-30MCAPACITY (Btu/h)AIR VOLUME (cfm) 1165 1235 1900 2120 2330 2540

Note1. The room ventilation capacity is based on :(1) Compressor room Temperature rise which is controlled within the 9 . (2) Static pressure of ventilation air should be 0 inchWG.

2. Consult the distributor for more information on ventilation capacity when the air exhaustduct is installed.

A B C DCHSA-7.5M 24 42 42 24CHSA-10M 24 42 42 24CHSA-15M 24 42 42 24CHSA-20M 42 42 42 24CHSA-25M 24 42 42 24CHSA-30M 24 42 42 24


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1-9-3. PIPING WORKCAUTION

- All service piping must be installed so as to exert zero force of movement on the system.- A drain valve and isolation valve should be mounted near the compressor discharge section.- Water condensation can affect the operation of pneumatic devices. After-coolers and the addition of

air dryers can eliminate this hazard. Similarly, avoid allowing compressor coolant to enter the plant airsystems. Air line separators properly selected and installed will reduce any liquid carry-over.

- When installed in parallel operation, you must provide an isolation valve and drain trap for eachcompressor unit before the common receiver. Screw air compressors should not be installed in airsystems with reciprocating compressors without a means of isolation, such as a common receiver. Itis recommend that both types of compressor units are piped to a common receiver utilizing individualair lines.

- In case of a lead fluctuation, or a very small volume in pipe from discharge connection of compressorunit to the end of the piping, the use of air receiver is recommended.

- In case the discharge piping has to be unusually long, you should select the diameter of the piping inconsidering the pressure drop in the piping.

- Consult your distributor for proper technical support.

Fig 1-9. Parallel installation Fig 1-10. Installation with reciprocating compressor

1-9-4. ELECTRICITY. This extensive line of Coaire screw air compressors has been designed to provided allthe conveniences of air supply system, especially for the stats of the art manufacturing industries. These unitsare composed of compressor, motor, protection devices and control equipment. The applicable voltage rangefor each unit is given in the electrical data. The working voltage among the three phases must be balanced

within 2% deviation from each voltage at the compressor terminals. Voltage range limit is to be 90110 ofregular voltage described in proportional frequency. Unbalance of voltage measured in motor terminals should

be within 3 in accordance with the following formula :(V)max - (V)mean

---------------------------- 100 ()(V)mean

where,(V)max : Maximum voltage among three terminals(V)mean : Average voltage among three terminals

CAUTION


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ELECTRICAL WIRING- Read all related topics in this manual.- Comply to the National Electric Code(NEC) and any other local codes- Utilize a qualified, licensed electrical contractor

1-9-5. ELECTRICAL SPECIFICATION3 Phase Motor

MODEL

AIR-END MOTORNO FUSE

BREAKER

OVER

CURRENT

RELAY

MAIN CABLE

OUTPUT

[kW/Hp]

INPUT

[kW]

POWER[V]

360Hz

F.L.A.

[A]

L.R.A.[A] POWER

FACTOR

[%]

FRAME

[AF]

TRIP

[A]

TRIP

[A]

POWER

[]

KIV

GROUND

[]

GVDIRECT Y-DELTA

CHSA-7.5M 5.59/7.5 6.39

208 19.0 70.8 -

94

30 30 22.8 3.5 1.25

230 17.0 64.0 - 30 30 20.4 3.5 1.25

460 8.5 32.0 - 30 15 10.2 2 1.25

CHSA-10M 7.46/10 8.43

208 25.6 74.1 -

91

50 40 30.72 5.5 2

230 23.2 67.0 - 50 40 27.84 5.5 2

460 11.6 38.5 - 30 20 13.92 3.5 1.25

CHSA-15M 11.19/15 13.3

208 38.7 137.1 -

90

60 60 46.44 8 3.5

230 35.0 124.0 - 60 60 42 8 3.5

460 17.5 62.0 - 30 30 21 3.5 1.25

CHSA-20M 14.92/20 16.54

208 52.0 168.0 -

88

100 75 62.4 14 3.5

230 47.0 152.0 - 100 75 56.4 14 3.5

460 23.5 76.0 - 50 40 28.2 5.5 2


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CHAPTER IIOPERATING INSTRUCTIONS

2-1. INITIAL START-UP. Before starting the unit for the first time, all operators must become familiar with allparts and assemblies. Only qualified personnel are to start the machine(Contact your distributor).

2-1-1. BEFORE OPERATIONMake sure that :

All installation piping and electrical work has been properly installed and completed. The main power is disco nnected.The voltage of the power source is at a regular level. Tightness of all electrical connections and wirings. Tightness of all joints, fasteners, covers, plugs and caps are inspected. Tightness of all grounding connections are inspected.

V -belt tensions are inspected.The oil level is at the proper point Isolation stop valve in the discharge air line is completely open.

WARNINGCHECK PROPER ROTATION

There is no the reverse phase relay in the unit. Operator should open the front belt guard andcheck proper rotation visually. You can see rotation arrow on the belt guard. Reinstall guardprior to any further running.2-1-2. STARTING

Turn on the main disconnection switch. Power lamp on air compressor instrument panel lights up.Press start key on operating panel of the unit.

The running lamp on the unit-operating panel lights up.Check the rotation

While checking proper rotation, you should not run the machine for 5 sec. or more. If you do not, the air-endwill be damaged. Reinstall guard prior to any further operation.

WARNINGREVERSE ROTATION

Upon initial operation, check proper rotation. If reverse rotation, disconnect the main powerand interchange two of three main cables on terminal board installed in the control box.

Check oil level and run the unit for a short period. Oil level may drop asoil circulates into the system. Add oil if the level during operation shouldbe below the lower centerline of lower oil level gauge. Press stop buttonto stop the motor. After confirming that the discharge pressure gaugereads 0 psig(approximately 90 seconds after stopping the motor), add oilas necessary.

Check the unit for any abnormal noise or vibration. Run the unit at the discharge pressure 57 to 71 psig for approximatelyone hour.


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gradually close the isolation stop valve until the discharge pressure gauge indicates the same pressure asthe oil sump pressure.

WARNINGDo not loosen the oil-filling plug before the internal pressure is vented completely. Make surethat the oil-filling plug is tightly fastened after oil has been added. Restart the unit. Check theoil piping for any oil leak, and correct as required.

Check the safety valve ; Pull the attached ring to operate the safety valve, use caution and appropriatesafety equipment.Check the capacity control system: Gradually close the stop valve at the external air receiver. As dischargepressure rises, stop closing when the discharge pressure reaches the cutout pressure.

2-1-3. STOPPINGPress ST OP key. Machine is stopped after 30 second, stop control time.Make sure that the blow -off solenoid valve operates.The blow-off air sounds for approximately 90 seconds.Make sure that the discharge pressure gauge reads 0 psig.

2-2. DAILY OPERATIONBEFORE EACH DAY OF OPERATION Drain the condensation from after-cooler.

Check oil level. Proper oil level is at centerline of upper oil level gage with machine not running.

STARTINGPress START key.

DURING THE OPERATION.Check oil level gauge. Make sure that all gauges in compressor instrument panel indicates normal status and followings.

SPECIFICATION UNIT Limit RemarksDischarge temperature Less Than 203Ambient Temperature Less Than 115Indicating Lamps - RunVoltage Volt Normal Power 10%Current Amp Less than Normal Current+15%Pressure Differential, unit and line PSID Max. 15

STOPPINGPress STOP key. Make sure that the discharge pressure gauge reads 0 psig. Operate the toggle switch for oil heater as follows(if op tion is installed) :For ambient temperature consistently over 50 when the unit is idled, place the toggle switch to "OFF"position. For ambient temperature consistently below 50 when unit is not running, place the toggleswitch to "ON" position.

2-3. STANDARD FACTORY SETTINGS OF CONTROL COMPONENTSSPECIFICATION UNIT STANDARD FACTORY SETTING VALVE

Discharge pressure Psi 110 125 150Minimum pressure valve Psi 57

Discharge pressure switch Psi 110/90 125/105 150/130Oil separator element diff. switch Psi 10


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Oil filter diff. switch Psi 25Discharge temperature switch 220

2-4 Factory Set ValuesNo. Items Factory set point Adjustable Range1 Compressor discharge shut down temperature 220 176 ~ 230 2 Start idling time 5 Sec. 5 ~ 10 Sec.3 Unloading control time 5 Min. 5 ~ 10 Min.4 Stop control time 30 Sec. 20 ~ 50 Sec.5 Drain valve off-time 5 Min. 1 ~ 45 Min.6 Drain valve on-time 1 sec. 1 ~ 5 Sec.7 Discharge pressure 110 Psi 80 ~ 190 PSI


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2-5. OPERATION AND CONTROL SEQUENCE(1) CAPACITY CONTROL SYSTEM

POWER ON

(Check rotation) START

(No alarm)

POWER OFF

IF REVERSE

ROTATION

Y- START

(IF APPLICABLE, DELTA RUN

AFTER Y-START)

EXCHANGE 3

OF 2 MAIN

CABLE

LOAD OPERATION

(AFTER 5 SEC. IDLING

OPERATION)

LINE PRESSURE MONITORING

(PRESSURE SWITCH)

SET PRESSURE

OR LESS LOAD OPERATION

(Loading Valve ON)

SET PRESSURE OR MORE

OFF LOAD OPERATION

(Loading Valve OFF)

LINE PRESSURE MONITORING

(Pressure Transmitter)

SET PRESSURE

OR MOREOFF LOAD

OPERATION

(Loading Valve OFF)

SET PRESSURE MINUS 21

PSIG

RETURN LOAD OPERATION

(Loading Valve ON)

OFF LOADING TIME

CHECK

STAND-BYMODE

(AFTER STOPPING

OPERATION)

AUTO-RESTART

BY LINE PRESSURE


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(2) STOP CONTROL SYSTEM

WHILEMACHINE ISRUNNING

PUSH STOP BUTTON

MONITORING WHEN IN OFF-LOAD

OPERATIONWHEN IN

LOAD

OPERATION

OFF-LOAD OPERATION OFF-LOAD OPERATION TIME COUNT

(IF SET TIME IS OVER) (IF SET TIME IS ON)STOP CONTROL

OPERATIONWHILE SET TIME

(SET TIME:30~60SEC.) OFF-LOAD OPERATIONWHILE REMINING TIME

MACHINE STOP

(3) TROUBLE MONITORING SYSTEM

MOTOR OVERLOAD HIGH DISCHARGETEMPERATUREOIL FILTER or

OIL SEPARATORCLOGGED

O.C.R.(ITH) TEMPERATURE SENSOR DIFF. PRESSURESWITCH

FLASH ALARM LAMP ON SWITCH PANEL ALARM MESSAGE ON L.C.D. BUZZER

RESET AND STOPDISCONNECT POWER AND RELEASE PRESSURE

CHECK AND REPLACERESTART


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13

CHAPTER IIIFUNCTIONAL DESCRIPTIONS

3-1. COMPRESSOR AIREND. Oil injected, single stage, rotary screw type that primarily consists of rotors,housing, and shaft seal along with other component parts.

FeaturesPrecision grind rotors provide close inter -lobe clearance. This minimizes leakage and increases efficiency.Long service life and high reliability of bearings achieved by application of 5+7 profile rotors. At thedischarge end of the compressor, angular contact ball bearings for the male and female rotors are locatedto support axial thrust loads and to position the rotor. Cylindrical roller bearings are also located tosupport radial loads.With a differential pressure lubrication system, the compres sor can dispense with an oil pump, thus

dramatically simplifying the oil supply system.The wedge construction of the secondary sealing element of the mechanical seal naturally eliminatesleakage. This seal is highly reliable and excellent performance.

3-1-1. ROTORS. The male rotor has five lobes and the female rotor has seven grooves. This is patented SRMdesigned profiles.

Fig 3-2. Pair of rotor

3-1-2. HOUSING. The cylindrical roller bearings support the radial loads, whereas the angular ball bearingssupport the axial loads.

3-1-3. SHAFT SEAL. Mechanical seal is fitted on the male rotor shaft to prevent oil leakage.

Fig 3-3. Detail of mechanical seal

3-2. DRIVE MOTOR. IEC or NEMA standard, drip-proof, 3-phase, 2 or 4 pole induction motor.


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3-3. V-BELT DRIVE. Motor speed is increased by V-belt drive to the male rotor's driving speed.

Fig 3-4. V-Belt drive

3-4. CAPACITY CONTROL. All models provide capacity control, on-line/off-line control. Internal pressure isvented to atmosphere at partially loaded or unload conditions whereby the motor idles for power savingfeatures.

3-5. LUBRICATION SYSTEM. The lubrication system consists of oil cooler, oil separator, and controls the oiltemperature within an allowable limit. The oil circulates through the system by differential pressure.

3-6. AFTER COOLER / OIL COOLER. The cooler assembly is consisting in heat exchanger, cooling fan, fanmotor and bracket.After-cooler and oil-cooler are composed of corrugated fin and tube type with aluminummaterial. Those fins remove the compression heat efficiently. Cooling fan exhausts the heat-exchanged airthrough a ventilation duct to the outside of the enclosure.

3-7. OIL SEPARATOR. Spin-on type Oil separator is located at the air-end, which efficiently separates the oilfrom discharged air.

3-8. OIL FILTER. Oil filter element is located at the air-end, which efficiently filtering foreign material fromcirculating oil. The oil filter has from 5 to 10 micron paper cartridge, and it should be replaced every 1000 runhours normally.

3-9. THERMOSTATIC VALVE. This is the oil by-pass valve, Located in the oil cooler outlet pipe in order tomaintain adequate system temperature for efficient compression and protect to making water from compressedair. The operating temperature is set 160 .

3-10. MINIMUM PRESSURE VALVE. Located in air-end discharge in order to maintain adequate systempressure for efficient separation of oil, pressure setting is 57 psig. If less than 57 psig, adjust the screw tomaintain pressure on 57 psig or more.

3-11. AIR INTAKE FILTER. The air intake filter is replaceable, dry-type filter with two-stage design. It consistsof an outside element of urethane and inside element of polyester.

3-12. INSTRUMENT PANEL. Consists of start button, stop button, indicating lamps, synoptic display, controlpanel and pressure gauge.

3-13 STARTER AND CONTROL BOX. Consists of pre-wired direct starter for model CHSA-7.5M through


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CHSA-30M and star-delta starter useable for model CHSA-30M optionally.

3-14. SAFETY DEVICEShutdown switch for discharge high air temperatures Differential shutdown switch for oil filter Differential shutdown switch for oil separator element

Overload for motor Overload for cooling fan motor

Safety valve


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CHAPTER IVSCHEDULED MAINTENANCE

4-1. STANDARD MAINTENANCE SCHEDULE. Maintenance schedule is instructed as below. The intervals area guide based on normal operating conditions. If operated in a severe environment, necessary maintenanceservice should be performed on a more frequent basis. User should carry out the maintenance work, based oneither the running hours or the calendar time whichever comes first. Please be advised that Items marked with

should be performed by a user while the other marked with should be maintained, by an authorizeddistributor.

PartActionTaken

Maintenance Interval

RemarkDaily

Monthly 6 Monthly Annually 2 yearly 4 yearly

1000 Hrs 3000 Hrs 6K HRS 12K HRS 24K Hrs

OilSeparator

Oil Level Check

Condensation Drain

OilSampling

Replace

Oil Tank Clean

Level Gauge Clean

O-ring, Gasket Replace

Monitor Check

Air Filter Element Replace

Separator Cartridge Replace

Oil Filter Cartridge Replace

After Cooler Clean

Intake Suction ValveClean

Repair

Safety Valve Clean

Solenoid Valve Check

Min. Pressure ValveClean

Repair

V-beltTension

Replace

Elec. wire terminal Check

Cooling fan Clean

Indication of controlpanel

Check

4-2. CONTROL OF LUBRICATION. The control of lubrication is critical. Neglecting it may cause varnish or

Motor

Insulation Check

Bearing Replace

Grease Refill

Air-end

Bearing Replace

Oil Seal Replace

O-ring, Gasket Replace


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sludge deposits in the system, resulting in severe damage or breakdown of the unit. The major causes of suchdeposits are :

Mixing of different types or brands of oil.

Use of unsuitable oil. Failure to drain the condensation, which will result in oil deterioration. Failure to change oil within a scheduled maintenance interval.

WARNINGUse of inappropriate oil and/or improper maintenance may result in catastrophic damage to the aircompressor or may result in a oil separator element fire.CONSULT YOUR DISTRIBUTOR FOR MAINTENANCE SERVICE AND COLUBE 68 COMPRESSOR OIL.

4-2-1. FUNCTIONS OF OIL. Oil is an essential factor in the oil flooded rotary screw compressor. Use COAIRECOLUBE 68 only, which is developed for pressurized circulation system, containing rust, foam, oxidation andwear inhibitors along with effective water release characteristics. Oil performs the following functions :

Lubrication : Oil lubricates the bearing and other internal components. Sealing : Oil seals the clearance between the two rotors and clearance between the rotors and inner wallof casing. This prevents air leakage above the inter mesh during compression to increase compressionprocess efficiency.Cooling : Oil is injected during compression process to remove the heat of compression.

WARNINGNever mix different brands or types of oils each other. Blending of oils may cause a formation of varnishor sludge deposits in the system. If oils have been carelessly mixed or if a certain brand of oil must bereplaced with another, be sure to flush out the oil system first. Consult your distributor for theprocedures. We highly recommended the use of Genuine COAIRE Screw Compressor OilCOAIRE-COLUBE 68.

4-2-2. OIL CHANGE.A practical way is to change the oil at the following intervals:

First oil change: 500 hours after initial start -up.Second oil change: 1,500 hours after the first oil change.( 2,000 hours after the initial start-up)Third and consequent oil changes: Every 3,000 hours after the previous oil change.

Oil life is related to working environment. High operating temperature or dirty ambient conditions willrequire more frequent oil changes.The above intervals are based on normal operating conditions. If condensation is not drained from the unit, the

oil will be deteriorated and required more frequent oil changes.Proceed as follows:

Run the unit loaded mode long enough to have the oil warm up. Stop the unit, confirm that the pressure has been released completely, and close the isolation stop valve at

the discharge outlet and disconnect the main electrical.Place a drain pan unde r the oil drain valve of the unit, and open the valve. Open the plug of oil filling port

on oil separator to speed up draining.For draining the oil cooler, remove the plug at the drain outlet of the oil cooler to let the oil run down. Drain the oil as completely as possible. Then, close the drain valve of the oil separator and drain plug of oilcooler. Return the plug to the drain outlet and tighten.

Fill with new oil through the oil filling port of oil separator. Refer to the specification table for appropriateoil amount.


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After securely tightening the plug at the oil filling port, run the unit to make sure there are no oil leaks.

4-2-3 DRAINING CONDENSATION. Moisture contained in intake air can be condensed into water during longunloading time or when the unit is stopped, and this moisture is accumulates in the separator sump, Since thewater in a compressor system can cause deterioration of oil and internal rusting, do not neglect draining thecondensation at least on a daily basis. Draining should be performed before start-up since oil and condensationhave been sufficiently separated from each other. Open the drain valve at outlet of oil separator sump. Use apan to store the condensation being drained. Closely watch the draining condensation, and close the valve.

NOTEIf a compressor operation can be suspended (for example, during lunchtime), it is a wise practice todrain the condensate once again after the suspension time. Thirty(30) minutes may be enough forsufficient separation of oil from condensation.

WARNINGEven if the unit is in 24 hour continuous service, it is still recommended to perform a drainingprocedure. Normally in such an operation mode, an extra stand-by compressor has to be installed atthe same time to allow for better draining of condensation.

CAUTIONLUBRICANT

Avoid prolonged breathing of vapors. Always use adequate ventilation, contact with eyes should beavoided. Avoid prolonged periods of skin contact.If excessive vapors are inhaled, remove person to fresh air area. In the event of contact with eyes,flush with water and consult a physician if serious irritation persists.In the event of contact with skin, wash contacted area with soap and water. Wash clothing beforereusing.Oil is flammable. Use water fog, foam, dry chemical or carbon dioxide to extinguish. Avoid use ofdirect stream of water since the oil may float and re-ignite.Dispose of oil by using an recycling service. Do not dump oil into drain or onto the ground. Do notplace oil or partially filled oil containers in trash. Keep out of sewers and water systems


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CHAPTER VTROUBLE SHOOTING

As a guide, the most likely problems are listed in the table below. Before doing any work on this unit, be sure theelectrical supply has been shut off and the entire compressor system has been vented of all pressure. In case ofthe automatic safety shutdown, the operating panel will indicate the shutdown mode. Inspect the cause ofshutdown, correct it and reset emergency switch on operating panel.

5-1. TROUBLE SYMPTOMS AND SOLUTIONSCONDITION POSSIBLE CAUSE SUGGESTED REMEDY

1. Failure to start or restart a. Main breaker opened a. Resetb. Power Failure or low voltage b. Inspect power sourcec. Control circuit fuses blown c. Replaced. Failure of electric components(motor, starter coil,start button, sol. valve etc.)

d. Repair or Replace

e. Loose wiring or wires too small or disconnected e. Tighten or replace

2. Unscheduled shutdowns a. Automatic safety shutdownsa-1. Main motor overload a-1. See CONDITION 3.a-2. High discharge air temperature a-2. See CONDITION 4.

b. Control circuit fuses blows b. Replace

3. Main motor over load(Safety shutdown)

a. Difficulty of air-end rotation a. Consult the distributora-1. Foreign material in air-enda-2. For oil separator filter elementa-3. Oil viscosity too high(oil deterioration or oil

heater not switched ON at stoppingb. Low voltage b. Inspect source voltage

4. High dischargetemperature(safety shutdowns)

a. high ambient temperature a. Improve room ventilationb. Low oil Level b. Add oil as necessaryc. Oil cooler

c-1. Clogged inside tube c-1. Clean or replacec-2. Dirt accumulation on fins c-2. Clean

d. Oil filter clogged d. Clean or replace elemente. Failure of oil temperature regulating valve e. Check or replacef. Insufficient cooling air flow f. Check or replace the fan

and filterg. Deterioration of oil g. Change oil

5. High Discharge pressure a. Failure of suction throttle valve a. Repair or replaceb. Failure of pressure Transmitter b. Repair or replace

6. Low discharge pressure a. Too high air demand a. Install a new compressorb. Leak in discharge line b. Check the air line

c. Air intake valve clogged c. Clean or replaced. Oil separator element clogged d. Replacee. Suction Throttle valve plugged e. Disassemble and cleanf. Failure of blow-off solenoid valve f. Replaceg. Failure of pressure Transmitter g. Check or replaceh. Other failure of capacity control h. Consult the distributorI. Failure of minimum pressure valve I. Clean or replacej. Indication failure of discharge pressure gage j. Replacek. Drive belt loose k. Tighten or replace

CONDITION POSSIBLE CAUSE SUGGESTED REMEDY7. Failure to unload property a. Failure of pressure setting a. Adjust setting

b. Other failure of capacity control b. Consult the distributorc. Control line filter clogged c. Clean or replace

8. High oil consumption or a. Too high oil level in separator tank a. Removal oil


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discharge air contains oilmist

b. Oil leak :b-1. From mechanical seal(Too much leak) b-1. Consult the distributorb-2. From joint b-2. Retighten

c. Failed or clogged oil separator element c. Replaced. Faulty installation of separator element d. Correcte. Failure of minimum pressure valve e. Replacef. Use of improper oil f. Change the oil after flushingg. Too frequent unload and load g. Readjust setting points

9. Oil deterioration a. Use of improper oil a. See CONDITION 8-fb. Mixing of different oil b. See CONDITION 8-fc. High ambient temperature c. See CONDITION 4-ad. Water included in oil d. See CONDITION 8-fe. Scheduled oil change neglected e. See CONDITION 8-f

10. Noise and vibration a. Loose components and joints a. Retightenb. From air end b. Consult the distributor

b-1. Bearing demand or wornb-2. Foreign material

c. V-belt slip c. Adjust tension or replaced. Wrong installation of the unit d. Correct the installatione. Unbalanced cooling fan(Dust collection) e. Clean the fan

11. Blow-back of oil/air a. Failure of Intake check valve a. Replaceb. Minimum pressure valve leak b. Replacec. failure of capacity control c. Consult the distributore. V-belt broken during running d. Replacef. Coupling broken during running e. Replace


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5-2. OPERATION RECORD FORM

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De


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CHAPTER VI

CORRECTIVE MAINTENANCE6-1. OIL FILTER. If the differential pressure between inlet and outlet of the oil filter reaches 18.5 psig, itmeans that an oil filter is in a severe clogging state and you must clean the oil filter immediately. Thereplacement of oil filter element under normal operating conditions should be performed every 1,000 hours oronce a monthly whichever comes first.

NOTEIn cold ambient temperature conditions, the oil tends to have a high viscosity. Therefore, checking theoil temperature must be carried out only after the unit has run for a while and warmed-up properly.

To replace the oil filter element, please take the following steps :Stop the unit, and make sure that the discharge pressure gauge indicates 0 psig.Rotate the oil filter in a counter clockwise rotation when viewed from the bottom of the filter. Remove the filter element and make certain the seal is also removed. Clean the i nner surface of filter head.Reinstall the filter element and seal.

Fig 6-2. Oil filter


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6-2. SUCTION FILTER. Whenever the operating time is over 500 hours or as required in service operatingconditions, clean the suction filter. To clean the suction filter, please follow the steps as described below :

After stopping the unit, remove the cover. Unscrew the wing nut off, and take out the element and the silencer.Remove the first stage element. Gently knock the t wo end faces of second stage element alternately on aflat surface to remove most of heavy, dry dirt.

Using an air nozzle held at a suitable distance betweenthe nozzle and the inside pleats of second stage element,blast up and down the pleats in a reverse flow action.Clean the first stage element by using an air nozzle.Inspect the element by placing a bright light nearby it Ifthere are thin spots, pin holes or ruptures show up,discard the element.Reinstall the element. Make sure that the ele ment has

seated tightly without any gap between the filter andthe silencer.Tighten the wing nut.

Fig 6-4. Suction Filter

CAUTIONThe second stage polyester element may be washable five times at a maximum. Do not fail to discard theused element and replace it with a new one.

6-3. OIL SEPARATOR CARTRIDGE. Oil separator cartridge is located at the upper part of air-end. Oilseparator cartridge separates the fine oil mist from the air. Separated oil is collected at the bottom of thecartridge, and is scavenged to the air-end. Under normal operating conditions, the oil carry over in thedischarge air is controlled within the design limits. If the oil separator element is clogged, the oil carry-over isincreased. Check every 3,000 hours or six(6) month to check whether excessive oil consumption exists. Replacethe oil separator cartridge and clean the inside of oil separator every 6,000 hours or yearly whichever comesfirst. To replace the element, please follow the steps as described below :

Stop the unit, and make sure that the discharge pressure gauge indicates 0 psig. Rotate the oil filter in a counter clockwise rotation when viewed from the bottom of the filter.Remove the filter element and make certain the seal is also removed.Clean the inner surface of filter head. Reinstall the filter element and seal.

6-4. AIREND MECHANICAL SEAL. Mechanical seal is located on the suction side of male rotor shaft. Thecontact surfaces are lubricated by oil, which is fed through a port in the oil seal housing. The drain tube for thisoil is routed back to the air intake via a check valve. This system must be inspected, cleaned or replaced ifnecessary every 24000 operating hours or every 4 years whichever comes first. Oil seal wear may bemonitored/tested. Maximum oil leakage 3 cc/h. Consult your distributor.

CAUTIONDo not install anything to block the drain tube, such as a stop valve. The drain tube should be open to theatmosphere in order to check for the mount oil leak, in the event of such incident.


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6-5. MINIMUM PRESSURE VALVE. Minimum pressure valve is located on the compressor discharge line afterthe separator tank. The valve is set at 57 psig for maintaining adequate system pressure for effective separationof oil. If the set pressure is not proper, readjust as follows :

WARNINGThe correct minimum pressure is vital for the function of the compressor. Tampering with theadjustment may cause a compressor breakdown. Valves should be adjusted by authorized personnel.Contact your distributor.

6-6. SUCTION CONTROL VALVE. Service the suction control valve every 6,000 hours of operation or yearlywhichever comes first. Proceed as follows :

Stop the unit and disconnect the electrical mains. Close the isolation stop valve.Make sure that the unit is completely depressurized. Remove the suction filter and silencer. Disconnect all the piping on suction control valve. Remove the bolts fixing the su ction control valve with air-end. Take out the suction control valve with carenot to damage the surrounding equipment. Protect the air-end inlet against the entry of dust by coveringit.Disassemble the suction control valve. Remove the gasket(or o -ring) from groove. Use care so the gasketsurface or the groove is not damaged.Inspect the Butterfly valve and non -return valve for any damage or scratches.Mount the suction control valve on the air -end. Tighten the bolts and set screws.Reconnect all the piping. Make sure that the installation positions are correct.Open the isolation stop valve and start the unit. Make sure that the suction control valve is operatingcorrectly.

6-7. OIL /AFTER COOLER & COOLING FAN. It is important to keep the fins of oil cooler and after cooler freefrom dust accumulation to ensure optimum efficiency of heat exchange. Therefore, the coolers and cooling fanshould be cleaned every 3,000 hours or six(6) month whichever comes first. To clean the cooler fins, use an airnozzle or steam jettier. Wipe the accumulated dust off the cooling fan to prevent unbalanced rotation.(Extremeenvironments may require more frequent servicing.)

6-8. OIL TEMPERATURE REGULATING VALVE. Service the oil temperature regulating valve every 6,000 hoursof operation or at once a year whichever comes first. Please proceed as follows :

Stop the unit and disconnect the electrical mains. Make sure that the unit is completely depressurized. Prepare the oil pan to catch dripping oil. Disconnec t the oil pipings to take out the assembly of the oiltemperature regulating valve assembly.Disassemble the oil temperature regulating valve assembly.

Using a new o -ring, reassemble the oil temperature regulating valve and connect it to the piping.

6-9. V-BELTS6-9-1. TENSION CHECK. Inspect belts every 50 hours of operation when new and adjust tension andalignment as required until 200 hours. Then inspect every 2000 hours or four months whichever comes first. Forinspection of belt tension, proceed as follow :

As illustrated below, push and pull each V -belt in both in and outward with a spring balancer or tensionmeter.

Check the average deflections measured. Make sure that the average deflections are approximately the same value as in the table below.


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Fig 6-14. V-Belt tension

6-9-2. TENSION READJUSTMENT AND ALIGNMENT. If necessary, readjust the tension as follow : Isolate main power. Loosen the lock bolts located at the motor base. Loosen the tightening nuts of adjusting bolts. Tighten the adjusting bolts, until the correct tension is

obtained.

If necessary, inspect the alignment as follows :Motor shaft and air -end rotor shaft must be parallel, and motor sheave and pulley must be exactly oppositeeach other. Put the end of a string into the groove between pulley and V-belts. Holding the other end ofthe string, stretch the string onto the end surface of motor sheave and pulley. Make sure that no gap existsat the points & . If there is a gap, slightly loosen or retighten either of adjusting bolts.

Tighten the nuts. Tighten the lock bolts, and check the tension a gain for confirmation.Manually turn the pulleys, and make sure that they can turn smoothly.

WARNING Loosely tensioned V-belts may develop problems such as; slipping of V-belts, premature wearing of

V-belts and pulley grooves, abnormal heat generation, loss of pressure, etc. Too tightly tensioned V-belts may develop the problems such as; shaft damage, short service life of

bearings, etc.

NOTEConsult with distributor in your area for V-belts replacement, if any of the followings has occurred beforethe normal replacement interval (12,000 hours) : V-belts are elongated too much to get the correct tension. Any one of V-belts is worn, damaged or broken. Neglecting it may cause all of V-belts to break.

MODELNEW INSTALLATION READJUSTMENT

TENSION

P lbs

DEFLECTION

inch

TENSION

P lbs

DEFLECTION

inchCHSA-7.5/10M 5.5 0.267 4.8 0.267CHSA-15/20M 5.9 0.276 5.3 0.276


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Fig 6-15. V-Belt alignment

6-10. PRESSURE TRANSMITTER. Check the settings of the pressure switch every 500 hours of operation ormonthly basis whichever comes first. If cut-out pressure settings are not proper, readjust as follows :

Differential = Cut-out pressure cut-in pressureTherefore, the value of standard factory setting is 25.6 psig

NOTEGenerally, the narrower differential needs a larger air receiver and vice versa. However, please be advisedthat using an unnecessarily larger air receiver is not generally recommended.

6-11. SAFETY VALVE. Make sure that safety valve is operative, every 500 hours of operation or monthlywhichever comes first. To operate the safety valve, pull the attached ring while the unit is running. Thereby thecollected condensate and rust will be relieved. Use caution and appropriate safety equipment and procedures.


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Appendix-ACOMPRESSOR PART LIST

1. Part List for Model CHSA-7.5/10M(NK40)

Item Part Number Description QTY.

1 CHSA-7.5/10M-3-1 Air-end 1

2 CHSA-7.5/10M-3-2 Intake Control Valve w/Air Filter 1

3 CHSA-7.5/10M-3-3 Separator Cartridge 1

4 CHSA-7.5/10M-3-4 Oil Filter 1

5 CHSA-7.5/10M-3-5 Temperature Prove Connection 1

6 CHSA-7.5/10M-3-6 Oil Circuit / Out 1

7 CHSA-7.5/10M-3-7 Oil Reservoir 1

8 CHSA-7.5/10M-3-8 Oil Circuit / In 1

9 CHSA-7.5/10M-3-9 Safety Valve 1

10 CHSA-7.5/10M-3-10 Air Intake 1

11 CHSA-7.5/10M-3-11 Compressed Air Outlet 1

12 CHSA-7.5/10M-3-12 Port For Pressure Transmitter 1

13 CHSA-7.5/10M-3-13 Oil Filler Plug 1

14 CHSA-7.5/10M-3-14 Minimum Pressure Valve 1


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2. Part List for Model CHSA-15/20M(NK60)


1 CHSA-15/20M-3-1 Air-end 1

2 CHSA-15/20M-3-2 Intake Control Valve w/Air Filter 1

3 CHSA-15/20M-3-3 Separator Cartridge 1

4 CHSA-15/20M-3-4 Oil Filter 1

5 CHSA-15/20M-3-5 Temperature Prove Connection 1

6 CHSA-15/20M-3-6 Oil Circuit / Out 1

7 CHSA-15/20M-3-7 Oil Reservoir 1

8 CHSA-15/20M-3-8 Oil Circuit / In 1

9 CHSA-15/20M-3-9 Safety Valve 1

10 CHSA-15/20M-3-10 Air Intake 1

11 CHSA-15/20M-3-11 Compressed Air Outlet 1

12 CHSA-15/20M-3-12 Port For Pressure Transmitter 1

13 CHSA-15/20M-3-13 Minimum Pressure Valve 1

14 CHSA-15/20M-3-14 Oil Filler Plug 1


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3. Part List for Model CHSA-25/30M(NK100)


1 CHSA-25/30M-3-1 Air-end 1

2 CHSA-25/30M-3-2 Intake Control Valve w/Air Filter 1

3 CHSA-25/30M-3-3 Separator Cartridge 1

4 CHSA-25/30M-3-4 Oil Filter 1

5 CHSA-25/30M-3-5 Temperature Prove Connection 1

6 CHSA-25/30M-3-6 Oil Circuit / Out 1

7 CHSA-25/30M-3-7 Oil Reservoir 1

8 CHSA-25/30M-3-8 Oil Circuit / In 1

9 CHSA-25/30M-3-9 Safety Valve 1

10 CHSA-25/30M-3-10 Air Intake 1

11 CHSA-25/30M-3-11 Compressed Air Outlet 1

12 CHSA-25/30M-3-12 Port For Pressure Transmitter 1

13 CHSA-25/30M-3-13 Minimum Pressure Valve 1

14 CHSA-25/30M-3-14 Oil Filler Plug 1


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Appendix-B

1. PART LIST FOR MODELCHSA-7.5M(1/2)


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1. PART LIST FOR MODELCHSA-7.5M(2/2)


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2. PART LIST FOR MODELCHSA-10M(1/2)


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C. Wiring Diagram for Model CHSA-7.5/10/15/20M


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Appendix-D

1. Outline Drawing for Model CHSA-7.5/10M


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2. Outline Drawing for Model CHSA-15/20M


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Warranty Claim ReportPlease complete the following claim form, your claim will be confirmed by our sales representative.

To : Coaire Technologies, Corporation12226 Coast Drive, Whittier, CA 90601 Tel(562)463-3935.Fax(562)463-4928

DistributorCompany Date

AddressModel

Serial No.

CustomerCompany Run Hours Hrs.

AddressSetting Press. PSIG

OPERATING CONDITIONS

Percent(%) on load % Ambient Temperature FNo. of days of operation weekly Days Discharge temperature FHours per day Hours Compressor area temperature FMachine setting OL/OL or Mod Environment 1)

1) 1 to 10, 1 being clean, 10 very dirtyIncoming Voltages Full load amperage at _______ PSIG Unload amperage at ______ PSIG

L1 - L2 L2 - L3 L1 - L3 L1 - L2 L2 - L3 L1 - L3 L1 - L2 L2 - L3 L1 - L3Volts Amp. Amp. Amp. Amp. Amp. Amp. Amp. Amp.

Symptom

Fault Diagnosis

Resolution

Parts required Labor CostNo. Item Number Description/MFGR Part Number Quantity Labor Time: Hrs x $/Hrs= $01 Travel Time: Hrs x $/Hrs= $02 Total Amount: $03

04 Technicians name:

WRITTEN BY SIGNATURE X

TECHNOLOGIES CORP.12226 COAST DRIVE, WHITTIER, CA 90601 TEL.(562)463-3935 FAX(562)463-4928


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STARTUP REPORT FOR ROTARY SCREW AIR COMPRESSOR

Please fill out completely and return to the factory to validate warranty.

CUSTOMER AND MACHINE INFORMATIONCUSTOMER FACTORY SHIP DATE / /ADDRESS DATE STARTED UP / /CITY/STATE MODEL NUMBER CHSA- SPHONE SERIAL NUMBERWRITTTEN BY HOURS ON MACHINE Hrs.

MACHINE INFORMATIONS AND INITIAL STARTUPCompressor Environment- excellent , good , fair , poor .

Machine Location indoors outdoors if outdoors, protected from rain? Yes No .Approx. ambient temperature______ adequate ventilation? - Yes No .

Did you check for correct rotation? Yes No Nameplate amperage for voltage used ________

Incoming VoltagesL1L2 L2L3 L1L3

Volts Volts Volts

Full load amperage at _________ PSIGL1 L2 L3

Amp. Amp. Amp.

Unload amperage at _________ PSIGL1 L2 L3

Amp. Amp. Amp.

Is the machine on a level and stable surface? Yes No .

Did you have to add lubricant oil? Yes No .

if yes, please indicate amount and exact name and type. (Amount _______ Name _______ Type _______ )

Was a flexible connector used to connect piping? Yes No .

Approx. time spent during startup procedure ___________ Hrs.

Did you advice customer on operation and maintenance of machine? Yes No .

Application and installation comments:____________________________________________________________________________________________________________________________________________________

____________________________________________________________________________________________________________________________________________________________________________________

Machine Sold By(Company) __________________ Sales Person ___________________________

Startup performed by ____________________ Date _________________________________

THERE IS NO WARRANTY WITHOUT THIS REPORT!


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QUALITY AND RELIABILITYWITHOUT COMPROMISE

TECHNOLOGIES CORP.8740 Pioneer Blvd., Santa Fe Springs, CA 90670 TEL.(562)463-3935 FAX(562)463-4928

COAIRE reserves the right to make changes, at any time without notice asa result of our commitment to continuous improvement.COAIRE-CHSA-03/05

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