MANUAL DE EQUIPO PERFORACION, Monografías, Ensayos de Escritura Técnica

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ORV 10

ORV 12

ORX 10

ORX 12

Instruction Manual for Portable Compressors

English

ORV 10 - ORV 12 - ORX 10 - ORX 12

Warranty and Liability Limitation

Use only authorized parts.

Any damage or malfunction caused by the use of unauthorized parts is not

covered by Warranty or Product Liability.

The manufacturer does not accept any liability for any damage arising for

modifications, additions or conversions made without the manufacturer's approval

in writing.

While every effort has been made to ensure that the information in this manual is

correct, Atlas Copco does not assume responsibility for possible errors.

Copyright 2007, Atlas Copco Airpower n.v., Antwerp, Belgium.

Any unauthorized use or copying of the contents or any part thereof is prohibited.

This applies in particular to trademarks, model denominations, part numbers and

drawings.

Instruction Manual

Follow the instructions in this booklet and we guarantee you years

of troublefree operation. Please read the following instructions

carefully before starting to use your machine.

Always keep the manual available near the machine.

In all correspondence always mention the compressor type and

serial number, shown on the data plate.

The company reserves the right to make changes without prior

notice.

Always use this manual in conjunction with the operating manual of

the driving mechanism!

CONTENTS P AGE

1 Safety precautions ...................................................................

1.1 Introduction .................................................................

1.2 General safety precautions ..........................................

1.3 Safety during transport and installation ......................

1.4 Safety during use and operation ..................................

1.5 Safety during maintenance and repair.........................

1.6 Tool applications safety ..............................................

1.7 Specific safety precautions..........................................

2 Leading particulars .................................................................

2.1 Description of safety pictograms

used in this manual......................................................

2.2 General description .....................................................

2.3 Main Parts .................................................................

2.4 Controls and indicators..............................................

2.5 Air flow .....................................................................

2.6 Oil system..................................................................

2.7 Continuous regulating system ...................................

2.8 Electrical system .......................................................

2.9 Markings and information labels...............................

3 Operating instructions ..........................................................

3.1 Transport instructions................................................

3.2 Before starting ...........................................................

3.3 Starting ......................................................................

3.4 Compression starting.................................................

3.5 During operation .......................................................

3.6 Stopping ....................................................................

Instruction Manual

1. SAFETY PRECAUTIONS

To be read attentively and acted accordingly before lifting, operating, performing maintenance or repairing the compressor.

1.1 I NTRODUCTION

The policy of Atlas Copco is to provide the users of their equipment with safe, reliable and efficient products. Factors taken into account are among others:

• the intended and predictable future use of the products, and the environments in which they are expected to operate,
• applicable rules, codes and regulations,
• the expected useful product life, assuming proper service and maintenance,
• providing the manual with up-to-date information.

Before handling any product, take time to read the relevant instruction manual. Besides giving detailed operating instructions, it also gives specific information about safety, preventive maintenance, etc.

Keep the manual always at the unit location, easy accessible to the operating personnel.

See also the safety precautions of the other equipment, which are separately sent along or are mentioned on the equipment or parts of the unit.

These safety precautions are general and some statements will therefore not always apply to a particular unit.

Only people that have the right skills should be allowed to operate, adjust, perform maintenance or repair on Atlas Copco equipment. It is the responsibility of management to appoint operators with the appropriate training and skill for each category of job.

Skill level 1: Operator

An operator is trained in all aspects of operating the unit with the push- buttons, and is trained to know the safety aspects.

Skill level 2: Mechanical technician

A mechanical technician is trained to operate the unit the same as the operator. In addition, the mechanical technician is also trained to perform maintenance and repair, as described in the instruction manual, and is allowed to change settings of the control and safety system. A mechanical technician does not work on live electrical components.

Skill level 3: Electrical technician

An electrical technician is trained and has the same qualifications as both the operator and the mechanical technician. In addition, the electrical technician may carry out electrical repairs within the various enclosures of the unit. This includes work on live electrical components.

Skill level 4: Specialist from the manufacturer

This is a skilled specialist sent by the manufacturer or its agent to perform complex repairs or modifications to the equipment.

In general it is recommended that not more than two people operate the unit, more operators could lead to unsafe operating conditions. Take necessary steps to keep unauthorized persons away from the unit and eliminate all possible sources of danger at the unit.

When handling, operating, overhauling and/or performing maintenance or repair on Atlas Copco equipment, the mechanics are expected to use safe engineering practices and to observe all relevant local safety requirements and ordinances. The following list is a reminder of special safety directives and precautions mainly applicable to Atlas Copco equipment.

These safety precautions apply to machinery processing or consuming air. Processing of any other gas requires additional safety precautions typical to the application and are not included herein.

Neglecting the safety precautions may endanger people as well as environment and machinery:

• endanger people due to electrical, mechanical or chemical influences,
• endanger the environment due to leakage of oil, solvents or other substances,
• endanger the machinery due to function failures.

All responsibility for any damage or injury resulting from neglecting these precautions or by non-observance of ordinary caution and due care required in handling, operating, maintenance or repair, also if not expressly mentioned in this instruction manual, is disclaimed by Atlas Copco.

The manufacturer does not accept any liability for any damage arising from the use of non-original parts and for modifications, additions or conversions made without the manufacturer’s approval in writing. If any statement in this manual does not comply with local legislation, the stricter of the two shall be applied. Statements in these safety precautions should not be interpreted as suggestions, recommendations or inducements that it should be used in violation of any applicable laws or regulations.

1.2 GENERAL SAFETY PRECAUTIONS

1 The owner is responsible for maintaining the unit in a safe operating condition. Unit parts and accessories must be replaced if missing or unsuitable for safe operation. 2 The supervisor, or the responsible person, shall at all times make sure that all instructions regarding machinery and equipment operation and maintenance are strictly followed and that the machines with all accessories and safety devices, as well as the consuming devices, are in good repair, free of abnormal wear or abuse, and are not tampered with. 3 Whenever there is an indication or any suspicion that an internal part of a machine is overheated, the machine shall be stopped but no inspection covers shall be opened before sufficient cooling time has elapsed; this to avoid the risk of spontaneous ignition of oil vapour when air is admitted. 4 Normal ratings (pressures, temperatures, speeds, etc.) shall be durably marked. 5 Operate the unit only for the intended purpose and within its rated limits (pressure, temperature, speeds, etc.). 6 The machinery and equipment shall be kept clean, i.e. as free as possible from oil, dust or other deposits. 7 To prevent an increase in working temperature, inspect and clean heat transfer surfaces (cooler fins, intercoolers, water jackets, etc.) regularly. See the 4.1 Preventive maintenance schedule for the compressor. 8 All regulating and safety devices shall be maintained with due care to ensure that they function properly. They may not be put out of action. 9 Care shall be taken to avoid damage to safety valves and other pressure- relief devices, especially to avoid plugging by paint, oil coke or dirt accumulation, which could interfere with the functioning of the device. 10 Pressure and temperature gauges shall be checked regularly with regard to their accuracy. They shall be replaced whenever outside acceptable tolerances. 11 Safety devices shall be tested as described in the maintenance schedule of the instruction manual to determine that they are in good operating condition. See the 4.1 Preventive maintenance schedule for the compressor. 12 Mind the markings and information labels on the unit. 13 In the event the safety labels are damaged or destroyed, they must be replaced to ensure operator safety. 14 Keep the work area neet. Lack of order will increase the risk of accidents. 15 When working on the unit, wear safety clothing. Depending on the kind of activities these are: safety glasses, ear protection, safety helmet (including visor), safety gloves, protective clothing, safety shoes. Do not wear the hair long and loose (protect long hair with a hairnet), or wear loose clothing or jewelry. 16 Take precautions against fire. Handle oil with care because it is an inflammable substance. Do not smoke or approach with naked flame when handling such substances. Keep a fire-extinguisher in the vicinity.

ORV 10 - ORV 12 - ORX 10 - ORX 12

1.3 SAFETY DURING TRANSPORT AND

INSTALLATION

To lift a unit, all loose or pivoting parts, e.g. doors, shall first be securely fastened.

Use a fork lift truck with forks equal to or longer than the unit.

Helicopter lifting is not allowed.

It is strictly forbidden to dwell or stay in the risk zone under a lifted load. Never lift the unit over people or residential areas. Lifting acceleration and retardation shall be kept within safe limits.

1 To lift heavy parts, a hoist of ample capacity, tested and approved according to local safety regulations, shall be used.

2 Lifting hooks, eyes, shackles, etc., shall never be bent and shall only have stress in line with their design load axis. The capacity of a lifting device diminishes when the lifting force is applied at an angle to its load axis.

3 For maximum safety and efficiency of the lifting apparatus all lifting members shall be applied as near to perpendicular as possible. If required, a lifting beam shall be applied between hoist and load.

4 Never leave a load hanging on a hoist.

5 A hoist has to be installed in such a way that the object will be lifted perpendicular. If that is not possible, the necessary precautions must be taken to prevent load-swinging, e.g. by using two hoists, each at approximately the same angle not exceeding 30° from the vertical.

6 Locate the unit away from walls. Take all precautions to ensure that hot air exhausted from an engine and driven machine cooling systems cannot be recirculated. If such hot air is taken in, this may cause overheating of the unit.

7 Before moving the compressor, switch it off.

1.4 SAFETY DURING USE AND OPERATION

1 When operating in a dust-laden atmosphere, place the unit so that dust is not carried towards it by the wind. Operation in clean surroundings considerably extends the intervals for cleaning the air intake filters and the cores of the coolers.

2 Close the compressor air outlet valve before connecting or disconnecting a hose. Ascertain that a hose is fully depressurized before disconnecting it. Before blowing compressed air through a hose or air line, ensure that the open end is held securely, so that it cannot whip and cause injury.

3 The air line end connected to the outlet valve must be safeguarded with a safety cable, attached next to the valve.

4 No external force may be exerted on the air outlet valves, e.g. by pulling on hoses or by installing auxiliary equipment directly to a valve, e.g. a water separator, a lubricator, etc. Do not step on the air outlet valves.

5 Never move a unit when external lines or hoses are connected to the outlet valves, to avoid damage to valves, manifold and hoses.

6 Do not use compressed air from any type of compressor, without taking extra measures, for breathing purposes as this may result in injury or death. For breathing air quality, the compressed air must be adequately purified according to local legislation and standards. Breathing air must always be supplied at stable, suitable pressure.

7 Distribution pipework and air hoses must be of correct diameter and suitable for the working pressure. Never use frayed, damaged or deteriorated hoses. Replace hoses and flexibles before the lifetime expires. Use only the correct type and size of hose end fittings and connections.

8 If the compressor is to be used for sand-blasting or will be connected to a common compressed-air system, fit an appropriate non-return valve (check valve) between compressor outlet and the connected sand- blasting or compressed-air system. Observe the right mounting position/ direction.

9 Before removing the oil filler plug, ensure that the pressure is released by opening an air outlet valve.

10 Never spill nor leave oil or cleansing agent in or around the unit.

11 All doors shall be shut during operation so as not to disturb the cooling air flow inside the bodywork and/or render the silencing less effective. A door should be kept open for a short period only e.g. for inspection or adjustment. 12 Periodically carry out maintenance works according to the maintenance schedule. 13 Stationary housing guards are provided on all rotating or reciprocating parts not otherwise protected and which may be hazardous to personnel. Machinery shall never be put into operation, when such guards have been removed, before the guards are securely reinstalled. 14 Noise, even at reasonable levels, can cause irritation and disturbance which, over a long period of time, may cause severe injuries to the nervous system of human beings. When the sound pressure level, at any point where personnel normally has to attend, is: below 70 dB(A): no action needs to be taken, above 70 dB(A): noise-protective devices should be provided for people continuously being present in the room, below 85 dB(A): no action needs to be taken for occasional visitors staying a limited time only, above 85 dB(A): room to be classified as a noise-hazardous area and an obvious warning shall be placed permanently at each entrance to alert people entering the room, for even relatively short times, about the need to wear ear protectors, above 95 dB(A): the warning(s) at the entrance(s) shall be completed with the recommendation that also occasional visitors shall wear ear protectors, above 105 dB(A): special ear protectors that are adequate for this noise level and the spectral composition of the noise shall be provided and a special warning to that effect shall be placed at each entrance. 15 The unit has parts, which may be accidentally touched by personnel, of which the temperature can be in exess of 80 °C (176 °F). The insulation or safety guard, protecting these parts shall not be removed before the parts have cooled down to room temperature. 16 Never operate the unit in surroundings where there is a possibility of taking in flammable or toxic fumes. 17 If the working process produces fumes, dust or vibration hazards, etc., take the necessary steps to eliminate the risk of personnel injury. 18 When using compressed air or inert gas to clean down equipment, do so with caution and use the appropriate protection, at least safety glasses, for the operator as well as for any bystander. Do not apply compressed air or inert gas to your skin or direct an air or gas stream at people. Never use it to clean dirt from your clothes. 19 When washing parts in or with a cleaning solvent, provide the required ventilation and use appropriate protection such as a breathing filter, safety glasses, rubber apron and gloves, etc. 20 Safety shoes should be compulsory in any workshop and if there is a risk, however small, of falling objects, wearing of a safety helmet should be included. 21 If there is a risk of inhaling hazardous gases, fumes or dust, the respiratory organs must be protected and depending on the nature of the hazard, so must the eyes and skin. 22 Remember that where there is visible dust, the finer, invisible particles will almost certainly be present too; but the fact that no dust can be seen is not a reliable indication that dangerous, invisible dust is not present in the air. 23 Never operate the unit at pressures or speeds below or in excess of its limits as indicated in the technical specifications.

ORV 10 - ORV 12 - ORX 10 - ORX 12

Pressure vessels

Maintenance/installation requirements:

1 The vessel can be used as pressure vessel or as separator and is designed to hold compressed air for the following application:

• pressure vessel for compressor,
• medium AIR/OIL, and operates as detailed on the data plate of the vessel:
• the maximum working pressure ps in bar (psi),
• the maximum working temperature Tmax in °C (°F),
• the minimum working temperature Tmin in °C (°F),
• the capacity of the vessel V in l (US gal, Imp gal, cu.ft).

2 The pressure vessel is only to be used for the applications as specified above and in accordance with the technical specifications. Safety reasons prohibit any other applications.

3 National legislation requirements with respect to re-inspection must be complied with.

4 No welding or heat treatment of any kind is permitted to those vessel walls which are exposed to pressure.

5 The vessel is provided and may only be used with the required safety equipment such as manometer, overpressure control devices, safety valve, etc.

6 Draining of condensate shall be performed daily when vessel is in use.

7 Installation, design and connections should not be changed.

8 Bolts of cover and flanges may not be used for extra fixation.

Safety valves

Potential hazards exist with the operation and maintenance of safety valves. Hazards can include catastrophic failure of the protected pressurised system resulting in death or serious injury or the emission of pressure medium, which may be noisy, hot, poisonous or aggressive. Inappropriate handling may present a risk of injury due to weight or sharp edges. Your attention is drawn to our joint responsibility to ensure that all statuory National regulations concerning Health and Safety including the Pressure Equipment Directive 97/23/EC are not contravened by incorrect installation, commissioning or servicing. Refer also to ISO 4126 or contact Seetru if you require further information regarding the use of safety valves.

Operating & Maintenance

Only trained and technically competent personnel should consider overhaul, re-set or performance testing of safety valves.

The safety valve is supplied with either a lead security seal or crimped cover to deter unauthorised access to the pressure regulation device. Under no circumstances should the set pressure of the safety valve be altered to a different pressure than that stamped on the valve without the permission of the installation designer. If the set pressure must be altered then use only correct parts supplied by Seetru and in accordance with the instructions available for the valve type. Safety valves must be frequently tested and regularly maintained. The set pressure should be periodically checked for accuracy. When fitted, the lifting device should be operated at pressures not less than 75% of the set pressure to ensure free and easy movement of internal parts. The frequency of tests is influenced by factors such as the severity of the operating environment and aggressiveness of the pressurised medium. Soft seals and springs should be replaced as part of the maintenance procedure. Do not paint or coat the installed safety valve. (see also 4.1 Preventive maintenance schedule for the compressor).

Valve Outlet The outlet of the discharge holes or pipe-work must not terminate in a position where discharged gas will cause a hazard. Outlet pipe-work should be as short and straight as possible and not allow an accumulated back pressure to build up from a discharging safety valve of greater than 10% of the set pressure. Superimposed back pressure must not be allowed. Outlet pipe-work should be supported to prevent mechanical loading of the safety valve. A drain should be fitted to the lowest point of the outlet pipe- work, which must be kept dry and clean to prevent blockage.

Control of Substances Hazardous to Health (COSHH) Data A small quantity of synthetic rubber components may be present in the safety valve. Synthetic rubber represents a hazard to health when subject to elevated temperature (315°C) such as fire. It will show physical signs such as charring or black sticky deposits, toxic and or corrosive fumes will also be given off. Treat with extreme caution if it has been subject to fire. Allow to cool before inspection. Avoid contact. Inform fire fighters of the presence of fluoroelastomer material. Compliance with Environmental Protection Act is essential when disposing of residue. Air supply respirators and acid resistant gloves must be worn if the above conditions apply.

Synthetic Component

Material

Hydrogen

Cyanide [HCN]

Cyanogen

[C2N2]

Hydrochloric

Acid [HCL Gas]

Hydrochloric

Acid [HF]Carbon

Monoxide [CO]

Divided

Silica [SiO2]Monomeric

Acryllic

Residual Ash

Corrosive

Non

Corrosive

Nitrile X X X

Neoprene X X

Viton X X

Butyl X X

Silicon X X

Fluoro Silicon X X X

Other X X X X

Instruction Manual

2. LEADING PARTICULARS

2.1 D ESCRIPTION OF SAFETY PICTOGRAMS USED IN

THIS MANUAL

Fig. 2.1 General view ORV/ORX

2.2 GENERAL DESCRIPTION

The ORV/ORX is a double-stage, oil-injected screw compressor

designed for power take-off application. The unit is built for a

normal effective working pressure of 16-25 bar(e) (ORV) or 19-

bar(e) (ORX). The power from the prime mover is transmitted to the

compressor elements through a gear casing.

A large range of gears is available for many different input speeds

and different air outputs (FAD).

- Compressor

The compressor has one low-pressure and one high-pressure

compressor element. Each compressor element houses two screw-

type rotors, mounted on ball and roller bearings. The male rotor,

driven by the engine, drives the female rotor. The elements deliver

pulsation-free air.

Injected oil is used for sealing, cooling and lubricating purposes.

- Compressor oil system

The oil is boosted by air pressure. The system has no oil pump.

The oil is removed from the air, in the air/oil vessel first by

centrifugal force, second through the oil separator element.

The vessel is provided with an oil level indicator.

- Regulation

The compressor is provided with a continuous regulating system and

a blow-down valve. The valve is closed during operation by outlet

pressure of the high-pressure compressor element and opens by air

receiver pressure when the compressor is stopped.

When the air consumption increases, the air receiver pressure will

decrease and vice versa.

This receiver pressure variation is sensed by the regulating valve

which, by means of control air to the unloader, matches the air output

to the air consumption. The air receiver pressure is maintained

between the pre-selected working pressure and the corresponding

unloading pressure.

- Cooling system

The compressor is provided with an oil cooler.

The cooling air is generated by a fan.

- Safety devices

Two thermal shutdown switches protect the compressor against

overheating. The air receiver is provided with a safety valve.

A minimum loading pressure switch prevents the compressor from

loading when the receiver pressure is too low.

A start prevention pressure switch prevents the compressor from

starting when the receiver pressure is too high.

- Bodywork

The compressor elements, air and oil filters, oil cooler and regulating

components are enclosed in a simple, weather-proof canopy. The

side panels are easily detachable by four quick fasteners. All fittings

to interconnect the two modules are centralized on a connecting

panel, situated at the left side of the compressor module.

The air filters may be serviced without removing a side panel.

All drain plugs are on the outside of the canopy to facilitate oil

change.

Transport beams are integrated in the frame for installation with a

fork-lift truck.

- Data plate

The compressor is furnished with a data plate showing the type,

serial number and normal working pressure (see chapter 8).

This symbol draws your attention to dangerous

situations. The operation concerned may endanger

persons and cause injuries.

This symbol is followed by supplementary information.

Instruction Manual

2.4 CONTROLS AND INDICATORS

Controls

• Safety valve (SV).

Releases air when the air receiver pressure is 30 bar(e) (ORV),

34 bar(e) (ORX).

• Check valve (CV).

Prevents blow-back of compressed air when the compressor is

stopped.

• By-pass valve (BV).

Protects the LP compressor element (CEL) in case the interstage

pressure should rise above the working pressure.

• Minimum pressure valve (MPV).

Prevents the air receiver pressure from dropping below 15 bar(e)

(ORV), 18 bar(e) (ORX).

• Blow-down valve (BDV).

Depressurizes the air receiver (AR).

• Oil filter by-pass valve.

Opens when the pressure drop over the oil filter (OF) is above

normal due to clogging of the element. The oil then by-passes the

element without being filtered. For this reason, it is imperative to

replace the oil filter at regular intervals.

• Oil stop valve (OSV).

Lets the oil run from the air receiver (AR) to the compressor

element. Opens when the unit is started. Closes when the unit is

stopped to prevent the compressor element from flooding with

oil.

• Flow restrictor (FR).

Manages the oil flow from the air receiver/oil separator (AR/OS)

to the compressor element, to minimize the leaking of air to the

compressor element.

• Thermostatic by-pass valve (TBV).

Opens when oil temperature is above 70 °C. Oil then flows

through the oil cooler (OC).

• Overpressure valve (OV).

Releases air when the pressure in the gear casing is too high.

• Start prevention switch.

The switch prevents the compressor from starting when the

receiver pressure is above 1.5 bar(e).

Indicators

• Temperature gauge (TG 1 ).

Indicates the air outlet temperature of the LP compressor element

(CEL).

• Temperature gauge (TG 2 ).

Indicates the air outlet temperature of the HP compressor

element (CEH).

• Interstage pressure gauge (PG 1 ).

Indicates the interstage pressure, i.e. the pressure between the LP

compressor element (CEL) and the HP compressor element

(CEH).

• Working pressure gauge (PG 2 ).

Indicates the air receiver pressure.

• Sight glass (SG).

Indicates the oil level in the air receiver.

ORV 10 - ORV 12 - ORX 10 - ORX 12

COMPRESSOR REGULATING S YSTEM (LOAD CONDITION)

Fig. 2.

AF Air filter AOV Air outlet valve (local installation) AR Air receiver BDV Blow-down valve BOV Bleed-off valve BV By-pass valve, HP compressor element CEH HP compressor element CEL LP compressor element CV Check valve

DP Drain plug DV Drain valve F Fan FP Filler plug (compressor oil) FR Flow restrictor GC Gear casing LV Loading solenoid valve MPV Minimum pressure valve OC Oil cooler OF Oil filter OLG Oil level gauge

OS Oil separator OSV Oil stop valve OV Overpressure valve PM Prime mover PS 1 Maximum loading pressure switch PS 2 Minimum loading pressure switch RV Regulating valve SL Scavenge line SV Safety valve TBV Thermostatic by-pass valve

TG 1 Temperature gauge, LP compressor element TG 2 Temperature gauge, HP compressor element TS 1 Temperature switch, LP compressor element TS 2 Temperature switch, HP compressor element TV Throttle valve UA Unloader assembly VIS Vacuum indicator switch

(PM)

(RV)

(GC)

(CEL) (F)

(DP)

(OSV)

(DP)

(DP)

(CV)

(CEH)

(LV)

(TV) (UA)

(BOV)

(OC)

(TBV)

(OF)

(BDV)

(OV)

(TS2)

(TG2)

(BV)

(VIS)

P (PS1)

(SL)

(AF)

(DV)

(OS)

(AR)

(SL)

(AOV)

(MPV)

(SV)

(OLG)

(FP)

(DP) (TG1) (TS1)

(PS2)

P

(FR)

ORV 10 - ORV 12 - ORX 10 - ORX 12

COMPRESSOR REGULATING S YSTEM

Fig. 2.

AF Air filter AFe Air filter element AFS Air filter switch AOV Air outlet valve AR/OS Air receiver/Oil separator BOV Blow-off valve BVof By-Pass valve oil filter C Cubicle CE Compressor element CF Cooling fan

CH Coupling housing CV Check valve DP Drain plug EW Electrical wiring FPco Filler plug (oil compressor element) FR Flow restrictor LV Loading valve MPV Minimum pressure valve OC Oil cooler

OF Oil filter OLG Oil level gauge OSE Oil separator element OSV Oil stop valve PS Pressure sensor RV Regulating valve SC Safety cartridge SL Scavenge line SV Safety valve TBV Thermostatic By-Pass valve

TG Temperature gauge TS Temperature sensor UA Unloader assembly WPG Working pressure gauge WPS Working pressure sensor

(SC)

(AF)

(BOV)

(CE)

(WPG)

(C) (EW)

(AFe)

(AFS)

(UA)

(CF) (TS) (PS)

(CV) (OSV)

(TS)

(PS)

(CH)

(BVof)

(TBV)

(OF)

(TG)

(DP)

(OC)

(AOV)

(LV)

(RV)

(MPV) (FPco) (OLG)

(WPS) (SV)

(FR) (SL) (OSE)

(AR/OS)

Instruction Manual

2.7 CONTINUOUS REGULATING SYSTEM

( SEE FIG. 2.4)

The compressor is provided with a continuous regulating system.

This system is provided with a blow-down valve (BDV). The valve

is closed during operation by outlet pressure of the compressor

element and opens by air receiver pressure when the compressor is

stopped.

When the air consumption increases, the air receiver pressure will

decrease and vice versa. This receiver pressure variation is sensed by

the regulating valve which, by means of control air to the unloader,

matches the air output to the air consumption. The air receiver

pressure is maintained between the pre-selected working pressure

and the corresponding unloading pressure.

When starting the compressor, the throttle valve (TV) is closed. The

compressor elements take in air and pressure builds up in the

receiver. The throttle valve is closed.

The air output is controlled from maximum output (100%) to no

output (0%) by air inlet throttling.

If the air consumption is equal to or exceeds the maximum air output,

the throttle valve is fully open.

If the air consumption is less than the maximum air output, the

regulating valve supplies control air to the throttle valve to reduce

the air output and holds air receiver pressure between the normal

working pressure and the corresponding unloading pressure of

approx. 1.5 bar above the normal working pressure.

When the air consumption is resumed, the throttle valve gradually

opens the air intake.

The construction of the regulating valve is such that any increase

(decrease) of the air receiver pressure above the pre-set valve

opening pressure results in a proportional increase (decrease) of the

control pressure to the throttle valve.

Part of the control air is vented to atmosphere, and any condensate

discharged, through the vent holes.

Instruction Manual

Fig. 2.6 Atlas Copco Installation

D1: Diode - max current 1A X

D2: Diode - max current 1A -1: +12/24 VDC

F1: Fuse 10A -2: Power After Contact

GNDc: Connection Canopy GND -3: Air Filter Warning

GNDe: Connection Element GND -4: Element Temperature Shutdown

K1: Relay - Element Temperature Shutdown -5: Compressor Drive Enable

K2: Relay - Compressor Drive Enable -6: Noload Signal

K3: Relay - Load Signal Overtake -7: Load Signal

OS1: Oiltronix™ System (Option) -8: Compressor Drive Start Signal

PS1: Pressure Switch - Start Prevention -9: Compressor Drive Running Signal

PS2: Pressure Switch - Load Prevention -10: GND

PS3: Vacuum Switch - Airfilter Warning -11: Oiltronix™ Failure Signal (Option)

TS1: Temperature Switch - LP Element Temperature Shutdown -12: Oiltronix™ Warning Signal (Option)

TS2: Temperature Switch - HP Element Temperature Shutdown -13: Oiltronix™ Draining Signal (Option)

X1: Connector -14: Not used

Y1: Loading Valve -15: Oiltronix™ Test Input (Option)

-16: Oiltronix™ Draining Acknowledged Input (Option)

+12/24VDC

24 24

30 87a

28

33

34

36

37

38

39

38

39

40

40

40

40

40

19 19

71 71

70 70

72 72

74 74

73 73

35

28 8729

87 30

87 30

86 85

86 85

A A

24

28

28

33

34

29

35 35

29

28

30

30

31

31

36

37

37

37

32 32

19 19

19

24

19

19

Oiltronix System

GNDc GNDe

OS

F

PS

PS

D

D

K

K

K

PS

Y1 (^) K3 K

TS

TS

K

1 2 3 4 5 7 8 9

10

11

12

13

14

15

16

6

10A

X

NOTE:

When the optional Oiltronix™ equipment is

installed the power supply must be 24 VDC.

ORV 10 - ORV 12 - ORX 10 - ORX 12

2.9 MARKINGS AND INFORMATION LABELS

Compressor outlet temperature too high.

Compressor outlet temperature.

Compressor outlet pressure.

Danger, heat flat.

Electrocution hazard.

Atlas Copco synthetic compressor oil.

Atlas Copco synthetic compressor oil.

Manual.

Reset fuse.

Prohibition to open air valves without connected hoses.

Compressor loaded.

Airfilter.

Compressor temperature too high.

Rotation direction.

Inlet.

Outlet.

Compressor oil drain.

Read the instruction manual before starting.

Service every 24 hours.

Warning! Part under pressure.