Coaire CHSA-7.5M Manuel utilisateur

COAIRE M-Series

EXTROLLER Control System

MAINTENANCE MANUAL AND PARTS LIST

MODEL

CHSA-7.5M CHSA-10M

CHSA-15M CHSA-20M

SERIAL NO. :

MODEL NO. :

MODEL CHSA-15CHSA-20M

COAIRE TECHNOLOGIES, CORPORATION

ROTARY SCREW AIR COMPRESSORS

For proper and safe use of the compressor, please follow all instructions and safety precautions as identified in

this manual, along with general safety regulations and practices.

SAFETY AND PRECAUTIONS

Before 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 cause

severe personal injury or property damage. Before installing, wiring, starting, operating or

making 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 and

maintaining this unit. Follow all procedures and piping accurately. Understand the starting and

stopping sequences. Check the safety devices in accordance with the following procedures

contained in this manual. Maintenance should be done by qualified personnel, accurately with

proper tools. Follow the maintenance schedule as outlined in the manual to ensure problem

free operation after start up.

SAFETY PRECAUTIONS

BEFORE INSTALLING THE COMPRESSOR OR PERFORMING ANY MAINTENANCE READ THIS MANUAL

CAREFULLY.

WARNINGS

COMPRESSED AIR AND ELECTRICITY ARE DANGEROUS. BEFORE DOING ANY WORK ON THIS UNIT, BE SURE THE

ELECTRICAL SUPPLY HAS BEEN SHUT OFF(LOCKED AND TAGGED) AND THE ENTIRE COMPRESSOR SYSTEM HAS

BEEN 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's

power has been shut off by use of a manual disconnect switch. A circuit breaker or fuse switch must be provided in

the electrical supply line to be connected to the compressor. The preparation work for installation of this unit must

be 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. If

so 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, which

are 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.

STATEMENT OF WARRANTY TERMS & CONDITIONS

COAIRE’s 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 or

other stocking facilities or 12 months from date of installation. Proof of installation date will be required. All air

compressors outside the U.S. and Canada carry a parts only warranty.

ALL FREIGHT DAMAGE CLAIMS ARE NOT THE RESPONSIBILITY OF THE MANUFACTURER AND ARE NOT

COVERED 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 OIL

COOLER COILS ARE CONSIDERED TO BE ROUTINE MAINTENANCE AND THEREFORE NON-WARRANTABLE

ITEMS 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 will

be considered misuse.

Any air compressors part or material found defective will be repaired, replaced or refunded, at the sellers option free of

charge, provided that COAIRE is notified within the above stated warranty period. All returns of allegedly defective

equipment must have prior written authorization. Said authorization may be obtained through our air compressor

service department. All air compressors, parts, materials must be returned freight prepaid to the Manufacturer’s

factory 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 prepaid

within 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 compressor

or to the extent as provided by the supplier, whichever is longer.

Identification Plate

The identification plate is located on the side of the air compressor and shows all the primary data of the machine. Upon

installation, fill in the table on the previous page with all the data shown on the identification plate. This data should

always 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 equipment

caused by improper usage or maintenance, and is limited to manufacturing defects only. Refer to COAIRE Warranty

policy manual for travel, mileage and special charge considerations. The warranty will be immediately voided if there

are 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 filed within 15 working days and should be directed to the carrier.

TABLE OF CONTENTS

Chapter Ⅰ. 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 Ⅱ. 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 Ⅲ. 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 ............................................................................................................................. 15

3-14. Safety device ............................................................................................................................................. 15

Chapter Ⅳ. Scheduled Maintenance

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

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

Chapter Ⅴ. Trouble shooting

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

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

Chapter Ⅵ. 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

CHAPTER I

GENERAL INFORMATION

1-1. 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 a

common 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 is

admitted 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 the

suction process.

Fig 1-1. Suction Process

1-2-2. COMPRESSION PROCESS. The air in the void is compressed as the

male rotor lobe meshes between the female rotor lobes and squeezes the air

against discharge cover.

Fig 1-2. Compression Process

1-2-3. OIL INJECTION PROCESS. As pressure builds, oil is injected into the

compression 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 is

occurring with one inter-lobe space, the other spaces are following the same

cycle. Therefore, air is compressed continuously.

Fig 1-4. Discharge Process

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. Air

then 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/oil

mixture leaves the air-end through the discharge port and flows into the oil separator where the oil is separated

from the compressed air. Compressed air leaves the oil separator, and is supplied to discharge connection of the

unit 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, which

is 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 hot

air 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 and

by the fluid cyclonic effect. After primary separation, the heavy oil falls and is collected in the oil sump at the

bottom of the oil separator.

Secondary separation: The air, which still contains fine oil particles, flows through the oil separator element

where the oil forms into large particles and is collected at the bottom of the element shell. Then, clean air

leaves the oil separator.

1-6. OIL FLOW. The oil, which is collected in the oil sump at the bottom of the oil separator, is circulated

through 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 or

completely and is sent to the oil filter. When the oil is hot, 185 ‘F(85’C) 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 oil

hole is provided into the intermesh among male rotor, female rotor and the rotor casing, the shaft seal, suction

side and discharge side bearings.

1-7. OIL SCAVENGE FLOW. After oil is separated from the air and collected in the element shell of the oil

separator, it is scavenged to the compression chamber of the air-end by the internal pressure differential so that

the oil carry-over in the discharged air can be controlled within the allowable limit.

TS PI

Fig 1-5. Operating flow diagram

1-8. STANDARD SPECIFICATIONS

MODEL

ITEM CHSA-7.5M CHSA-10M CHSA-15M

Motor output Kw(HP) 5.5(7.5) 7.5(10) 11(15)

Discharge pressure psi(g) 110 125 150 110 125 150 110 125 150

Air deliver

cfm 29.0 26.5 23.0 38.5 36.0 31.0 57.0 52.0 46.0

Compressor speed RPM 5250 4720 4350 6950 6380 5950 6450 6200 5550

Oil flow rate gpm 4.0 5.3 8.0

Ambient temperature ℉32 115∼℉

Discharge air temperature ℉Inlet air temperature + 27 (MAX)℉

Driving method - V-Belt V-Belt

Voltage V 3Ph(1Ph), 208-230V 3Ph, 208-230/460V

Frequenc

Hz 60

Starting method - Direct on Start

Oil sump capacity gal 0.7 0.7 1.1

Noise level dB(A) 68 70 71

Weight lbs 300 310 420

Dimensions(W×D×H) in 17×24.5/8x32.5/8 28.3/4x41.3/8x42.1/8

Air 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

MODEL

ITEM CHSA-20M CHSA-25M CHSA-30M

Motor output Kw(HP) 15(20) 19(20) 22(30)

Discharge pressure psi(g) 110 125 150 110 125 150 110 125 150

Air deliver

cfm 73.4 68.0 64.0 125.3 115.0 108.0

Compressor speed RPM 8280 7900 7500 5700 5380 5160

Oil flow rate gpm 8.5 11.9 11.9

Ambient temperature ℉32 115∼℉

Discharge air temperature ℉Inlet air temperature + 27 (MAX)℉

Driving method - V-Belt V-Belt

Voltage V 3Ph, 208-230/ 460

Frequenc

Hz 60

Starting method - Direct on Start

Oil sump capacity gal 1.1 1.3 1.3

Noise level dB(A) 72 73 73

Weight lbs 450 550 630

Dimensions(W×D×H) in 28.3/4x41.3/8x42.1/8 31.1/2x47.1/4x49.7/8

Air outlet piping size in 1” 1”

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

transportation.

1-9-1. HANDLING. When handling by a forklift, make sure that forks completely extend through the width of

the unit. When handling by a shop crane, use the openings provided on common base where slings or steel wire

ropes 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 unit

should not be installed outdoors. Consideration must be given to the need for clearance around the unit to avoid

the re-circulation of air-end for easy maintenance access.

(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 severe

damage to the unit.

HEAT GENERATION & VENTILATION FAN CAPACITY

MODEL

CAPACITY CHSA-7.5M CHSA-10M CHSA-15M CHSA-20M CHSA-25M CHSA-30M

CAPACITY (Btu/h)

AIR VOLUME (cfm) 1165 1235 1900 2120 2330 2540

Note

1. 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 exhaust

duct is installed.

A B C D

CHSA-7.5M 24 42 42 24

CHSA-10M 24 42 42 24

CHSA-15M 24 42 42 24

CHSA-20M 42 42 42 24

CHSA-25M 24 42 42 24

CHSA-30M 24 42 42 24

1-9-3. PIPING WORK

CAUTION

- 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 air

systems. 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 each

compressor unit before the common receiver. Screw air compressors should not be installed in air

systems with reciprocating compressors without a means of isolation, such as a common receiver. It

is recommend that both types of compressor units are piped to a common receiver utilizing individual

air lines.

- In case of a lead fluctuation, or a very small volume in pipe from discharge connection of compressor

unit 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 in

considering 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 all

the conveniences of air supply system, especially for the stats of the art manufacturing industries. These units

are composed of compressor, motor, protection devices and control equipment. The applicable voltage range

for 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 90％～110％of

regular 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

Ce manuel convient aux modèles suivants

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