GD air compressors

60
Operating Manual 50 - 110 kW GB Id. no. 100016909 / 07 - May 2011

description

VS 50-110kW

Transcript of GD air compressors

Page 1: GD air compressors

Operating Manual 50 - 110 kW ●GB Id. no. 100016909 / 07 - May 2011

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Deutsche Basis-BA: 100016908/07 1

General Information These compressors are for compressing atmospheric air and are not suitable for compressing any other gas. They are designed and manufactured to give optimum performance with long life and reliability.

This manual gives the user all the information required to install and operate the compressors and carry out the regular schedules for servicing and maintenance, which will ensure the maximum satisfactory service life.

Servicing facilities and the supply of genuine replacement parts are provided through a worldwide network of Gardner Denver Companies and Distributors. If replacement parts are needed, the user should, in the first instance, contact the local Gardner Denver Company or Distributor.

The information given in this manual was correct at the time of printing, however, as part of continuous development, modifications to parts and procedures may be made without notice which could affect the servicing requirements of the compressors. Before any servicing or maintenance work is undertaken the user is advised to contact the local Gardner Denver Company or Distributor who is supplied with revised and up-dated information.

In any communication concerning the compressor it is essential to quote the MODEL, SERIAL NUMBER and where possible the YEAR of MANUFACTURE.

All pressure data given in this manual refer to overpressures (pressure gauge pressures) unless specified otherwise.

Maintenance To ensure the continued trouble-free operation of the compressor unit it is important that periodic maintenance and servicing is carried out in accordance with the information given in the ‘Maintenance’ section of this manual. To assist in this matter your local Gardner Denver Company or Distributor can provide a number of optional maintenance agreements to suit your requirements. These agreements provide the user with the expertise of our factory trained technicians and the guarantee that only Genuine Gardner Denver parts will be used.

Warranty The conditions of the Gardner Denver Warranty are set out in the Company’s standard Conditions of Sale available from the Gardner Denver Company or Distributor supplying the machine.

USE ONLY GARDNER DENVER GENUINE PARTS. YOUR WARRANTY COULD BE AFFECTED IF A SERVICE OR REPAIR IS CARRIED OUT USING NON-GENUINE PARTS.

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Data sheet for users

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Fig. 1

Your Gardner Denver distributor

Name: Address: _____________________________________________________________________________________

_____________________________________________________________________________________

_____________________________________________________________________________________

Telephone: Fax: Contact: Spare Parts:

Service:

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1. Foreword

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1 Forew ord

1.1 Notes on the compressor Gardner Denver screw compressors are the result of many years of research and development. These prerequisites combined with high quality standards guarantee the manufacture of screw compressors providing a long service life, high reliability and cost-effective operation. It stands to reason that all requirements concerning environmental protection are met.

1.2 Intended use The machine/unit has been constructed in accordance with state-of-the-art technology and the recognized safety regulations. Nevertheless, its use may constitute a risk to life and limb of the user or third persons or cause damage to the machine or to other material property, if

• it is not used as intended, • it is operated by unqualified personnel, • it is improperly modified or changed, • the safety regulations are not observed.

Therefore, any person entrusted with the operation, maintenance or repair of the machine must read and follow the safety regulations. If required, this has to be acknowledged by signature.

In addition,

• relevant accident prevention regulations, • generally recognized safety regulations and • national regulations

have to be observed.

The machine/unit must only be used in technically perfect condition and in accordance with its intended use and the instructions set out in the operating manual, and only by safety-conscious persons who are fully aware of the risks involved in operating the machine/unit! Any functional defects, especially those affecting safety, have to be rectified immediately (or rectified by others)!

The machine/unit is designed exclusively for the generation of compressed air to power air-driven devices. Using the machine/unit for purposes other than those mentioned above is considered contrary to its intended use. The manufacturer/supplier cannot be held responsible for damage resulting from such use. The risk of such misuse lies solely with the user.

Operating the machine within the limits of its intended use also involves observing the instructions set out in the operating manual and complying with the inspection and maintenance directives.

1.3 Maintenance Carefully performed maintenance is imperative, this ensures that your screw compressor can meet all the requirements placed upon it. It is therefore imperative to adhere to the specified maintenance intervals and to carry out the maintenance work with particular care, especially when the unit is utilized under harsh operating conditions.

Servicing

Please contact your authorized Gardner Denver dealer in the case of malfunctions or when spare parts are required. In the case of damage, our fully trained personnel will ensure that a quick and proper repair is carried out using genuine Gardner Denver spare parts. Genuine Gardner Denver spare parts are manufactured utilizing state-of-the-art technology, thus guaranteeing the further reliable operation of the unit.

In case of queries

Please enter the data on the nameplate of your compressor into the nameplate shown in fig.1 on p. 2. In the case of queries or spare parts orders, please refer to the compressor type indicated on the nameplate, the identification no. and the year of construction. With this information at hand it can be guaranteed that you will receive the right information or required spare parts.

1.4 Notes General

These operating instructions are intended to familiarize the user with the machine/unit and its intended use. The instructions contain important notes on how to operate the compressor safely, properly and cost-effectively. Observing these instructions helps to avoid risks, to reduce repair costs and downtimes and to increase the reliability and service life of the machine/unit.

The operating instructions have to be supplemented by the respective national rules and regulations regarding the prevention of accidents and environmental protection. They must always be available at the location of the machine/unit. The operating instructions must be read and followed by any person carrying out work in connection with the machine/unit, e.g. operation, including setting up, trouble-shooting in the operation cycles, disposal of production waste, care, service, and disposal of waste fuels and consumables, upkeep (maintenance, inspection, repair), transport.

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1. Foreword

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Besides the operating instructions and the binding regulations for the prevention of accidents, which are valid in the country and place of operation of the machine/unit, the generally recognized technical regulations for safe and proper working have also to be observed.

Guarantee

Operate this compressor only if you have an exact knowledge of the machine taking into respect these instructions.

Gardner Denver cannot be held responsible for the safe operation of the machine/unit if it is used in a manner which does not correspond to the intended use, or for other applications which are not mentioned in these instructions.

Warranty claims will not be accepted in the case of

• Operating errors • Incorrect maintenance • Wrong auxiliary materials • Use of spare parts other than Gardner Denver

genuine spare parts • Modifications and changes to the installation

The warranty and liability conditions of the general terms and conditions of Gardner Denver will not be extended by the notes above.

Any unauthorized change to the compressor unit/ station, or the installation of components not accepted by the manufacturer (e.g. fine separator) will result in the withdrawal of the CE mark. As a consequence, any liability and warranty claims will not be accepted by the manufacturer.

Safety regulations

Danger

The safety regulations in chapter 3 of the operating instructions have to be strictly observed.

Technical changes

In the course of technical development we reserve the right to modify the units without further notice.

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2. Table of contents

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2 Tab le of conte nt s

1 Foreword...............................................................................................................................................................................3 1.1 Notes on the compressor .............................................................................................................................................3 1.2 Intended use..................................................................................................................................................................3 1.3 Maintenance..................................................................................................................................................................3 1.4 Notes .............................................................................................................................................................................3

2 Table of contents .................................................................................................................................................................5 3 Safety regulations ...............................................................................................................................................................7

3.1 Identification of safety guidelines .................................................................................................................................7 3.2 General safety instructions...........................................................................................................................................7 3.3 Changes and modifications to the machine ................................................................................................................8 3.4 Installation and normal operation.................................................................................................................................8 3.5 Special work/maintenance .........................................................................................................................................10 3.6 Warning of special dangers........................................................................................................................................12 3.7 Storage of compressors .............................................................................................................................................13 3.8 Symbols and explanations .........................................................................................................................................14

4 Design and functioning ....................................................................................................................................................18 4.1 Design of the unit ........................................................................................................................................................18

4.1.1 Design of the air-cooled EnviroAire VS 50-75...............................................................................................18 4.1.2 Design of the water-cooled EnviroAire VS 50-75 ..........................................................................................19 4.1.3 Design of the water-cooled EnviroAire VS 110 .............................................................................................20

4.2 Schematic diagram .....................................................................................................................................................21 4.2.1 Schematic diagram - air-cooled and water-cooled EnviroAire VS 50-75.....................................................21 4.2.2 Schematic diagram - water-cooled EnviroAire VS 110 .................................................................................22

4.3 Water circuit ................................................................................................................................................................23 4.4 Air circulation...............................................................................................................................................................23 4.5 Control .........................................................................................................................................................................23

5 Transport and installation ................................................................................................................................................25 5.1 Transport .....................................................................................................................................................................25 5.2 Installation ...................................................................................................................................................................25

6 Preparations for commissioning ....................................................................................................................................26 6.1 Cooling air volume/minimum cross ............................................................................................................................26 6.2 Compressed air connection........................................................................................................................................27 6.3 Water connection for water-cooled units ...................................................................................................................27

6.3.1 Limit values of the constituent elements in water..........................................................................................28 6.4 Electrical connection...................................................................................................................................................29

6.4.1 Electrical connection (EUROPE-Version only) ..............................................................................................29 6.4.2 Electrical connection (only USA/CANADA-Version) .....................................................................................31

6.5 Water supply ...............................................................................................................................................................32 6.5.1 First-time water filling ......................................................................................................................................32 6.5.2 Water supply during operation .......................................................................................................................33

6.6 Demineralisation unit ..................................................................................................................................................33 6.7 Extraction of water samples .......................................................................................................................................34 6.8 Sound pressure level ..................................................................................................................................................34

7 Commissioning ..................................................................................................................................................................35 7.1 First commissioning ....................................................................................................................................................35 7.2 Routine commissioning ..............................................................................................................................................37 7.3 Commissioning after malfunction...............................................................................................................................37

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2. Table of contents

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8 Service and maintenance.................................................................................................................................................38 8.1 Maintenance recommendations.................................................................................................................................38 8.2 Maintenance electric motor ........................................................................................................................................38 8.3 Maintenance schedule................................................................................................................................................38 8.4 Change of air intake filter............................................................................................................................................40 8.5 Change water filter......................................................................................................................................................40 8.6 Replace prefilter RO unit ............................................................................................................................................41 8.7 Change the RO membrane cartridge.........................................................................................................................41 8.8 Check and clean water level switch ...........................................................................................................................42 8.9 Safety valve.................................................................................................................................................................42 8.10 Connecting terminals in the switch cabinet/control transformer setting...................................................................42 8.11 Fittings .........................................................................................................................................................................42 8.12 General maintenance and cleaning ...........................................................................................................................42 8.13 Clean / change filter with cooling air inlet and control cabinet inlet..........................................................................43 8.14 Cleaning of the bearing flushing system....................................................................................................................44 8.15 Inspection of the compressor stage...........................................................................................................................45

9 Trouble-shooting ...............................................................................................................................................................46 10 Annex...................................................................................................................................................................................48

10.1 Technical data.............................................................................................................................................................48 10.1.1 Technical data air-cooled EnviroAire VS 50 ..................................................................................................48 10.1.2 Technical data water-cooled EnviroAire VS 50 .............................................................................................49 10.1.3 Technical data air-cooled EnviroAire VS 75 ..................................................................................................50 10.1.4 Technical data water-cooled EnviroAire VS 75 .............................................................................................51 10.1.5 Technical data water-cooled EnviroAire VS 110...........................................................................................52

10.2 Layout plan..................................................................................................................................................................53 10.2.1 Layout plan EnviroAire VS 50-75 ...................................................................................................................53 10.2.2 Layout plan water-cooled EnviroAire VS 110 ................................................................................................56

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3. Safety regulations

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3 Safet y reg ula tio ns

3.1 Identification of safety guidelines Gardner Denver is not liable for any damage or injury resulting from the non-observance of these safety instructions or negligence of the usual care and attention required during handling, operation, maintenance or repair, even if this is not explicitly mentioned in these operating instructions.

If any of the regulations contained in these instructions -especially with regard to safety - does not correspond to the local legal provisions, the stricter of both shall prevail.

These safety regulations are general and valid for various types of machines and equipment. It is therefore possible that some references do not apply to the unit(s) described in these instructions.

Danger

Passages marked with this sign indicate a possible danger to persons.

Important

Passages marked with this sign indicate a possible danger to machines or part of machines.

Note

Passages marked with this sign provide technical information on an optimal cost-effective use of the machine.

3.2 General safety instructions Organizational measures

The operating instructions must always be at hand at the place of operation of the machine/unit!

In addition to the operating instructions, all other generally applicable legal and other mandatory regulations relevant to accident prevention and environmental protection must be adhered to and passed on to others! These compulsory regulations may also deal with the handling of hazardous materials or the issuing/wearing of personal protective equipment, or traffic regulations.

Instructions, including supervisory responsibility and duty of notification for taking into account in-plant factors, for example regarding work organization, sequences of operations, personnel assigned to certain tasks, are to be added to the operating manual.

The personnel entrusted with working on the machine must have read the operating instructions and in particular the chapter on safety regulations before starting work. Reading the instructions after work has begun is too late. This applies especially to persons working only occasionally on the machine, e.g. for setting up or maintenance.

Check on a regular basis that the personnel are carrying out the work in compliance with the operating instructions and that they are paying attention to the safety requirements!

For safety reasons, long hair must be tied back or otherwise secured, garments must be close-fitting and no jewellery - such as rings - may be worn. Injury may result from being caught up in the machinery or from rings catching on moving parts! As necessary or as required by regulations, personal protective equipment should be used.

Observe all safety and warning notices attached to the machine/unit!

See to it that safety instructions and warnings attached to the machine are always complete and perfectly legible.

In the case of safety-relevant changes to the machine/ unit or its operating behaviour, stop the machine/unit immediately and report the fault to the responsible department/person!

Spare parts have to comply with the technical requirements specified by the manufacturer. This can always be ensured by using original spare parts.

Hydraulic hoses have to be changed within stipulated and periodic intervals, even if no safety-relevant faults have been detected!

Adhere to prescribed intervals or those specified in the operating instructions for routine checks and inspections!

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3. Safety regulations

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For the execution of maintenance work, tools and workshop equipment adapted to the task on hand are absolutely indispensable.

The personnel must be made familiar with the location and operation instructions of fire extinguishers ! Observe all fire-warning and fire-fighting procedures!

Limit values (pressures, time settings, etc.) have to be permanently identified!

Selection and qualification of personnel; basic responsibilities

Work on/with the machine/unit must be carried out by reliable personnel only. Statutory minimum age limits must be observed!

Employ only trained or instructed personnel and clearly set out the individual responsibilities of the personnel for operation, set-up, maintenance and repair!

Ensure that only authorized personnel work on or with the machine!

Define the machine operator's responsibilities giving the operator the authority to refuse instructions by third persons that are contrary to safety regulations.

Do not allow persons to be trained or instructed or persons taking part in a general training course to work on or with the machine/unit without being permanently supervised by an experienced person!

Work on the electrical equipment of the machine/unit must be carried out only by a skilled electrician in accordance with electrical engineering rules and regulations.

Work on system elements such as hoses may only be carried out by personnel with special knowledge and experience of hydraulics!

3.3 Changes and modifications to the machine

Do not make any changes, modifications or attachments to the machine/unit, which could affect safety, without the supplier's prior permission!

Unauthorized changes to the machine are not permitted for safety reasons.

Original parts were especially designed for this machine. We would like to point out that we have not released and will not release parts and special accessories which have not been supplied by us. The installation and/or use of such products can therefore affect the active and/or passive safety.

The manufacturer is not liable for damage resulting from the use of non-original parts or special accessories. This applies also to the installation and setting of safety equipment and valves as well as to welding on structural or pressurized parts.

3.4 Installation and normal operation Installation

In addition to the general technical operation in accordance with the stipulations of the local authorities, we would like to refer in particular to the following regulations.

For the lifting of a compressor, a suitable lifting mechanism is to be used, which meets the local safety regulations. All loose or slewable parts must be safely fixed before the machine can be lifted. It is strictly prohibited to stay in the danger zone of a lifted load.

The correct method of lifting (according to the operating instructions of the load suspension device) has to be ensured.

All blind flanges, plugs, caps and bags with drying agent have to be removed prior to the installation of the pipes. Distributing pipes and pipe connections have to be of the proper size and suitable for the relevant operating pressure.

The system has to be installed in such a way that it is adequately accessible and the required cooling is guaranteed. Never block the air intake. Make sure that the ingress of humidity via the intake air is kept to a minimum.

The air intake is to be located so that no hazardous constituent (solvent vapour, etc., but also dusts and other hazardous material) can be sucked in. This applies also to flying sparks.

The air intake is to be positioned so that no loose clothing of persons can be sucked in. Make sure that the pressure line from the compressor to the aftercooler or the air circuit can expand under heat and does not come into contact with inflammable material.

The pressure line connected to the air outlet of the system must be fitted stress-free.

When connecting the compressor on the mains side to the compressed air system available at the customer‘s end, check the operating temperatures and operating pressures required and examine the required connecting flange or the connection thread for proper functioning.

The compressed-air system (piping + reservoirs) must have not less than the following dimensions:

EnviroAire VS 50-75 : approx. 0.8 m³ EnviroAire VS 110 : approx. 1.2 m³

In the case of connections by means of connecting hoses, take appropriate measures to prevent whipping of the loose end in the event that the hose connection tears off.

If a remote control is used, the system must carry a clearly visible sign with the following note: Attention! This installation is operated by remote control and can start up without prior warning!

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3. Safety regulations

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As an additional safety measure, persons, who start remotely controlled systems, have to take sufficient safety precautions in order to ensure that nobody is checking the system or working on it. For this, a label with a corresponding warning notice has to be attached to the remote control equipment.

Compressed air and cooling water lines have to be clearly marked in line with the local regulations.

If a system comprises several compressors, hand-operated isolator valves have to be installed in order to be able to shut off each machine individually. When operating pressure systems, do not rely on the effectiveness of start valves alone to isolate these systems.

Safety equipment, protective covers or insulation must not be removed or modified. Any pressure reservoir, which is located outside the system, the permissible operating pressure of which is higher than the atmospheric pressure and which is fitted with two or more pressure supply lines, has to be equipped with additional safety equipment, which will automatically prevent the admissible operating pressure from rising by more than 10%.

The installed unit-specific safety valves only assume the pressure safeguarding function of the compressor unit provided in currently valid standards and regulations.

For pressure components/systems mounted to the connecting flange on the pressure side, a pressure safety device (safety valve or similar) has to be installed taking into account the weakest pressurized component.

The min. and max. temperatures of +2 °C/35,6 °F and +45 °C/113°F are also valid for the intake air. Pipes and/or other parts with a surface temperature higher than 70 °C/158 °F have to be suitably identified and shielded against touching.

Electrical connections must meet the local regulations. Power units must be connected to earth and protected from short-circuits by means of fuses.

Cold dryer

Wherever possible, the cold dryer should be installed in a place where the ambient air is as clean as possible and where the temperatures never rise above or fall below the respective limit values as indicated in the operating instructions. If required, the cooling air is to be taken from a cleaner, cooler or warmer area via an intake channel; depending on the size of the machine, an additional fan could turn out to be necessary.

If the room temperature can fall below zero, the condensation drain system must be protected from freezing, e.g. by means of a steam heater.

If it is possible that the intake temperature of the air will exceed, from time to time, the admissible maximum specified in the operating instructions, a precooler with condensate drain is to be installed before the dryer.

Tests or repair work on the coolant circuit may only be carried out in a well vented room. Never breath in coolant vapour; if necessary, wear a breathing mask. Always wear protective goggles and gloves. If skin comes into contact with coolants, rinse well with water. Never take off or tear up clothes but rinse them well with water until the coolant is washed off; then see a doctor.

Condensate drain

The drain hose for condensate discharge is to be connected to the drains or to a collecting reservoir, if local regulations prohibit direct discharge to the drains. In connection with this, it must be taken into account that the condensate from compressors with oil-lubricated pressure chambers can contain oil.

Normal operation

Take the necessary precautions to ensure that the machine is used only when in a safe and reliable state! Operate the machine only when all protective equipment, emergency shut-off equipment, sound-proofing elements and extraction devices are in place and fully functional!

Check regularly that

• all means of protection are correctly fitted and fixed,

• all hoses and/or pipes within the system are in good condition, firmly fixed and do not chafe,

• there are no leakages (fuel, oil or coolant),

• all fittings are firmly tightened,

• all wires are connected correctly and are in good condition,

• all safety valves and other pressure relief mechanisms are in good order and not blocked by e.g. dirt or paint,

• the safety mechanisms are fully functional.

If compressed air hoses are used, they must be of the proper size and suitable for the relevant operating pressure. Do not use chafed, damaged or poor-quality hoses.

Only use hose couplings and fittings of the right type and the correct size.

Before blowing through a hose or an air pipe ensure that the open end is positively held. A free end whips and can cause injuries.

Before decoupling a hose ensure that it is pressureless.

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Refrain from any working method which is doubtful in terms of safety.

Never play around with compressed air!

Never aim compressed air at your skin or at other persons!

Never use compressed air to clean your clothing.

When using compressed air to clean equipment take the utmost care and always wear protective goggles.

The compressed air generated by these compressors must never be used for breathing unless it has been conditioned for those applications in line with the “safety requirements for respiratory air”.

Never use the machine in an environment where inflammable or poisonous vapour can be sucked in.

Never operate the system at pressures and temperatures below or above the values indicated in the technical data sheet.

The access panels, etc. have to be closed during operation.

Check the machine/unit at least once per shift for visible damage and faults! Report any changes (including changes in the machine’s operating behaviour) to the responsible department/person immediately. If necessary, stop and lock the machine immediately!

In the case of malfunction, stop the machine/unit immediately and lock it! Have any defects rectified immediately!

Observe the start-up and stopping procedures and the control displays according to the operating instructions. Before starting up or setting the machine in motion, ensure that nobody is at risk.

Do not cut off or remove extraction or venting facilities while the machine is running.

3.5 Special work/maintenance Carefulness

Observe the adjusting, maintenance and inspection activities and intervals set out in the operating instructions, including information on the replacement of parts and equipment. These activities may be carried out by skilled personnel only.

Brief the operating personnel prior to starting special operations or maintenance work! Appoint a person to supervise the activities!

Maintenance and repair work may only be carried out under the supervision of a person who is qualified for this work.

Oil losses result in a slippery floor. Therefore, always clean the floor and the outside of the machine prior to starting the maintenance work.

Checks, maintenance and repair work may only be carried out with the screw compressor being at rest and depressurized. Protective equipment to be removed for this work, has to be refitted after completion of these activities. Operation of the machine without protective equipment is not permitted. When working on a running screw compressor system, working clothes have to be close-fitting.

If the machine/unit is completely shut down for maintenance and repair work, it must be secured against inadvertent restarting:

• Lock the main command elements and remove the key and/or

• attach a warning sign to the main switch.

Always use the correct tools for maintenance and repair work.

Never use inflammable solvents or carbon tetrachloride to clean parts. Take precautions against poisonous vapours from cleaning agents.

In any work concerning the operation, conversion or adjustment of the machine and its safety-oriented devices or any work related to maintenance, inspection and repair, always observe the start-up and shutdown procedures set out in the operating instructions and the information on maintenance work.

Ensure that the maintenance area is adequately secured.

To lower the risk of accidents, individual parts and large assemblies being moved for replacement purposes should be carefully attached to lifting tackle and secured. Use only suitable and technically correct lifting gear and only utilize suspension systems with adequate lifting capacity. Never work or stand under suspended loads!

During maintenance and when carrying out repair work, cleanliness is very important. Avoid the ingress of dirt by covering parts and free openings with a clean cloth, paper or adhesive tape.

After the completion of each repair, check that tooling or loose parts have not been left in the machine, drive motor or drive equipment and ensure that no cloth has been left inside these units.

Be careful when the screw compressor system is in operation.

Maintenance/rectification of faults

The employer has to inform the employee of the dangers possibly arising during the repair and maintenance of the machine/unit as well as on how to avoid them; the employee has to observe all measures for safety at work. Safety equipment for the prevention or elimination of danger has to be maintained regularly and functionally checked at least once a year. Faults observed have to be immediately rectified and/or reported to the responsible person.

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Use only original spare parts.

Only carry out maintenance and repair work when the system is not in operation and the power supply disconnected. Ensure that the power unit cannot be switched on inadvertently.

Before removing or opening pressurized components, positively isolate any source of pressure and depressurize the entire system.

Never weld near oil systems or carry out any other work requiring heat. Pressure reservoirs or components and pipes containing oil have to be drained completely and cleaned, for example by means of a steam jet, before beginning such work.

Never weld any pressure reservoir or change it in any way.

If work which produces heat, flames or sparks has to be carried out on a machine, the adjacent components have to be protected by means of non inflammable material.

Before releasing the power unit for operation after maintenance or overhaul, check that the operating pressures, temperatures and time settings are correct and that the regulating and shut-down equipment function properly.

Motor, air filter, electrical components and regulating equipment have to protected from the ingress of humidity, e.g. when cleaning the system by means of a steam jet.

Under no circumstance must the sound-proofing material be removed or modified.

Never use etching solvents which could attack the materials used.

If indicated or if there is any suspicion that an internal part of the machine has run hot, the machine has to be shut down.

In order to avoid an increase in the operating temperature, check and clean the heat transfer surfaces (cooling fins, intermediate cooler, water cooling jackets, etc.) at regular intervals. Prepare a plan of the most favourable cleaning intervals for each machine.

Avoid damage to the safety valves and other pressure reducing components. Check in particular for clogging caused by paint, oil carbon or the accumulation of dust, which could deteriorate the effectiveness of these components.

Insulation or protective shielding, the temperature of which may exceed 70 °C/158 °F and which could be erroneously touched by the personnel, must not be removed before these parts have cooled down to room temperature.

Check the accuracy of pressure and temperature indicators at regular intervals. If the admissible tolerance limits have been exceeded, these devices have to be replaced.

Before removing or overhauling a compressor, a motor or another machine, ensure that all moveable parts of a mass of more than 15 kg cannot move or roll away.

After completion of repair work, always verify that no tools, loose parts or cloths have been left in or on the machine, drive motor or drive equipment. Machines performing a back and forward main movement have to be cycled at least once, rotating machines have to be cycled several times in order to ensure that there are no mechanical faults in the machine or the drive member. Check the direction of rotation of the electric motors during first commissioning and after each modification of the electrical connections in order to prevent the compressor from being damaged.

The fastening of loads and the instructing of crane operators should be entrusted to experienced persons only. The person giving the instructions must be within sight or voice contact with the operator.

For carrying out overhead assembly work always use specially designed or otherwise safety-orientated ladders and working platforms. Never use machine parts as a climbing aid. Wear a safety harness when carrying out maintenance work at greater heights.

Keep all steps, handles, handrails, platforms, landings and ladders free from dirt, snow and ice! Clean the machine, especially connections and threaded unions, of any traces of oil, fuel or preservatives before carrying out maintenance or repair work! Never use aggressive detergents! Use lint-free cleaning rags!

Before cleaning the machine with water or steam jet (high pressure cleaner) or other cleaning agents, cover/mask all openings which have to be protected from the ingress of water, steam or detergents for safety and/or functional reasons, in particular electric motors and switch cabinets.

After cleaning, remove the covers/masking completely !

Check all hydraulic oil lines for leakage, loose fittings, abrasion and damage after cleaning. Any defect must be rectified immediately!

Always re-tighten screwed connections which have been loosened for maintenance and repair work.

If the set-up, maintenance or repair require the demounting of safety equipment, this equipment has to be remounted and checked immediately after these activities.

Ensure that consumables and replacement parts are disposed of in a safe and environmentally friendly manner.

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3.6 Warning of special dangers Electric energy

Use only original fuses with the specified current rating. Switch off the machine/unit immediately if trouble occurs in the electric system.

Work on the electrical system or equipment may only be carried out by a skilled electrician or by specially instructed personnel under the control and supervision of such an electrician and in line with the relevant electrical engineering rules.

If regulations require, the power supply to parts of machines and plants on which inspection, maintenance and repair work is to be carried out must be cut off. Before starting any work, check the deenergized parts for the presence of power and ground or short-circuit them in addition to insulating adjacent live parts and elements.

The electrical equipment of the machines/units is to be inspected and checked at regular intervals. Defects such as loose connections or scorched cables must be rectified immediately.

Necessary work on live parts and elements must be carried out in the presence of a second person who can cut off the power supply in case of danger by operating the emergency shutdown or main power switch. Secure the working area with a red-and-white safety chain and a warning sign. Use insulated tools only.

Before starting work on high-voltage assemblies and after having cut out the power supply, the feeder cable must be grounded, and components, such as capacitors, short-circuited with a grounding rod.

Always check a correct power supply to the compressor before commissioning. The voltage supply has to fulfill the requirements of EN60204-1/IEC60204-1 for such kind of industrial equipment. Insufficient power quality could have a strong effect on health & safety and may constitute a risk to life and limb of the user or third persons or cause damage to the machine or also the environment around.

Gas, dust, steam and smoke

Carry out welding, flame-cutting and grinding work on the machine/unit only if this has been expressly authorized, as there may be a risk of explosion and fire.

Before carrying out welding, flame-cutting and grinding operations, clean the machine/unit and its surroundings from dust and other inflammable substances and make sure that the premises are adequately ventilated (risk of explosion)!

Adhere to the regulations valid for the place of operation!

Observe any existing national regulations if work is to be carried out in small rooms.

Hydraulics, pneumatics

Work on hydraulic equipment may only be carried out by persons with special knowledge and experience of hydraulics.

Check all lines, hoses and screwed connections regularly for leaks and obvious damage. Repair damage immediately. High pressure jets of oil may cause injury and fire.

Depressurize all system sections and pressure pipes (hydraulic system, compressed-air system) which are to be removed in accordance with the specific instructions for the assemblies concerned before carrying out any repair work.

Hydraulic and compressed-air lines must be laid and fitted properly. Ensure that no connections are exchanged. The fittings, lengths and quality of the hoses must comply with the technical requirements.

Noise

Sound-proofing elements on the machine/unit have to be active during operation (i.e. sound-proofing panels closed, etc.).

Where necessary, wear the personal hearing protection prescribed.

Noise, even at a low level, can cause nervousness and annoyance; over a longer period of time, our nervous system can suffer serious damage. We therefore recommend a separate machine room in order to keep the noise of the machine away from the workshop.

• In order to consider all noise-relevant parameters and to adequately protect the health of the operator, the European Regulation 2003/10/EC must be satisfied completely by the user.

• In states outside the European Community, the respective noise protection directives must be taken into consideration.

Take care that the noise transmission through walls and frames does not result in too high a noise level in the surrounding areas.

Oils, greases and other chemical substances

When handling oils, greases and other chemical substances, observe the safety regulations for this product! Be careful when handling hot fuels and consumables (danger of burning or scalding)!

Rooms subject to explosion hazards

Danger

Compressor units must never be operated in areas subject to explosion hazards! (Exception: Special units with the corresponding technical modifications)

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3. Safety regulations

13

3.7 Storage of compressors All compressors are protected against corrosion at the factory for transport and for brief storage before commissioning.

If the compressors are to be stored for period exceeding six months, additional precautions must be taken.

Compressors which are to be shut down for a lengthy period must also be protected from corrosion.

Since corrosion occurs more quickly in damp atmospheres than in dry conditions, it is not possible to specify a maximum permissible standstill time which will apply in all cases.

Note

The following aspects must be taken into account for storage of storing compressors.

The compressor should be stored in a dry building which should be heated if possible. This is particularly true during the months of winter.

The coolant is to be completely drained where there is a risk of frost (t < 1°C).

If there is a risk that the temperature will fall or rise above the limits of -10 °C/14 °F to +65 °C/149 °F , the electrical controller must be removed and stored in ambient temperatures of +5 °C/41 °F to +30 °C/86 °F.

Before commissioning the compressor all the electrical and electronic components and units should be checked for the ingress of water or condensation.

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3. Safety regulations

14

3.8 Symbols and explanations

Carefully read the operating manual before commissioning or servicing this compressor.

Never breathe in compressed air from this system.

Never operate the unit with open doors or loose access panels.

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3. Safety regulations

15

Warning: Hot surface

Warning: Pressurized part or system

Warning: This system can start up by means of a remote control or automatically after a power failure.

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3. Safety regulations

16

Warning: The system continues to run for 30 seconds after pressing the O-key

Warning: Danger of electric shock

Attention: Lifting point

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3. Safety regulations

17

Attention: Check and, if required, re-tighten connection terminals. For further details, see the operating instructions.

Attention: Danger of electric shock from loaded condensers! Please always first disconnect the system from the power supply and wait another 12 minutes before touching the electrical components. The power condensers require this time in order to discharge!

Attention: Opening pressure safety valve = xx bar (value "xx" see sticker on compressor)

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4. Design and functioning

18

4 Design a n d f uncti oni ng

4.1 Design of the unit

4.1.1 Design of the air-cooled EnviroAire VS 50-75

Fig. 2

1 Intake filter 2 Suction inlet 3 Electric motor 4 Screw compressor 5 Pressure reservoir 6 Water filter 7 RO-Unit 8 Safety valve 9 Pressure holding and check valve 10 Water connection

11 Cooling air ventilator 12 Cooling air inlet filter mat 13 Compressed air outlet 14 Base frame 15 Control keypad 16 EMERGENCY OFF

push-button 17 Control cabinet 18 Supply cable gland 19 Opening for lifting gear

20 Water cooler 21 Fan protection panel 22 Water level indicator 23 Float switch 24 Network pressure sensor 25 Final compression

pressure sensor 26 Final compression temperature

sensor

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4. Design and functioning

19

4.1.2 Design of the water-cooled EnviroAire VS 50-75

Fig. 3

1 Water cooler 2 Fan 3 Cooling water inlet 4 Cooling water outlet

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4. Design and functioning

20

4.1.3 Design of the water-cooled EnviroAire VS 110

Fig. 4

1 Intake filter 2 Suction inlet 3 Electric motor 4 Screw compressor 5 Pressure reservoir 6 Water filter 7 RO-Unit 8 Safety valve 9 Pressure holding and check valve 10 Water connection 11 Cooling air ventilator

12 Cooling air inlet filter mat 13 Compressed air outlet 14 Base frame 15 Control keypad 16 EMERGENCY OFF

push-button 17 Control cabinet 18 Supply cable gland 19 Opening for lifting gear 20 Water cooler 21 Cooling water inlet

22 Cooling water outlet 23 Fan protection panel 24 Water level indicator 25 Float switch 26 Network pressure sensor 27 Final compression

pressure sensor 28 Final compression temperature

sensor

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4. Design and functioning

21

4.2 Schematic diagram

4.2.1 Schematic diagram - air-cooled and water-cooled EnviroAire VS 50-75

nozzle 3mm nozzle 8mm EnviroAire VS 50 10mm EnviroAire VS 75

Fig. 5

1. Intake filter 2. Vacuum generator

(only EnviroAire VS 75) 3. Electric motor 4. Compressor block 5. Compressor temperature sensor

(R2) 6. Pressure reservoir 7. Pressure holding valve 8. Water cutter

(only EnviroAire VS 75) 9. Safety valve 10. Osmosis unit 11. Water reservoir 12. Water filter

13. Water cooler 15. VS-Controller 17. Silencer 18. Manual valve 19. Mud flap 20. Ventilator 1 (all versions) 21. Ventilator 2 (only air-cooled-

version) 22. Non-return valve 23. Blow-off valve (Y4) 24. Solenoid valve water in (Y8) 25. Solenoid valve water out (Y9) 26. Solenoid valve water stop(Y10) 27. Network pressure sensor (B1)

28. Final compression pressure sensor (B2)

29. Bypass valve (Y11) 30. Cooling-water solenoid valve (Y6)

(water-cooled version only) 31. Choke valve, adjustable

(water-cooled version only) 32. Dirt trap (water-cooled version

only) 33. Blow-off line orifice 34. Bypass line orifice 35. Motor temperature (R1) 36. Differential pressure air filter (S7)

(Option) 37. Water level switch (S18/S19)

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4. Design and functioning

22

4.2.2 Schematic diagram - water-cooled EnviroAire VS 110

nozzle 3mm

nozzle 9mm (EnviroAire VS 110)

Fig. 6

1. Intake filter 2. Vacuum generator 3. Electric motor 4. Compressor block 5. Temperature sensor 6. Pressure reservoir 7. Pressure holding valve 8. Water cutter 9. Safety valve 10. Osmosis unit 11. Water reservoir 12. Water filter 13. Water cooler

15. SR-Controller 17. Silencer 18. Manual valve 19. Mud flap 20. Ventilator 22. Non-return valve 23. Blow-off valve (Y4) 24. Solenoid valve water in (Y8) 25. Solenoid valve water out (Y9) 26. Solenoid valve water stop(Y10) 27. Network pressure sensor (B1) 28. Final compression pressure

sensor (B2)

29. Bypass valve (Y11) 30. Cooling-water solenoid valve (Y6)

(water-cooled version only) 31. Choke valve, adjustable

(water-cooled version only) 32. Dirt trap (water-cooled version

only) 33. Blow-off line orifice 34. Bypass line orifice 35. Motor temperature (R1) 36. Differential pressure air filter (S7)

(Option) 37. Water level switch (S18/S19)

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4. Design and functioning

23

4.3 Water circuit The water flows from the pressure tank (- 5 - Fig. 2) through the water cooler (- 20 - Fig. 2) and water filter and is then injected into the screw compressor (- 4 - Fig. 2).

The entire water circulation is based on differential pressure in the system. Thus, water is injected into the screw compressor at a tank pressure of 10 bar/145 PSI with ca. 5.5 bar/ 80 PSI, for example.

4.4 Air circulation The suctioned air makes it way into the screw compres-sor (- 4 - Fig. 2) via the suction filter (- 1 - Fig. 2). The injected water cools air during the compressing process and the resulting compressed air – water mixture tangentially flows into the pressure tank (- 5 - Fig. 2). Thereby, the water is separated extensively from the compressed air and delivered into the mains via the pressure holding and non-return valve (- 8 - Fig. 2).

4.5 Control (See Fig. 5)

(Please also see the operating instructions for the compressor control Delcos-3100)

System downtime

• Solenoid valve (- 23 -(Y4)) is deenergized (open) when the system is shut down, solenoid valve (-29-(Y11)) is also deenergized (closed).

• The pressure vessel (- 6 -) is depressurized to atmospheric pressure via the solenoid valve (-23-(Y4)) and the nozzle (-34-).

Starting up the system

• The drive motor (- 3 -) starts up.

• The compressor draws air in via the air filter; a certain quantity is blown off again into the intake zone via the solenoid valves (-23-(Y4)) and (-29-(Y11)) and via the nozzle (-34-).

• This way, constant pressure of approx. 4 to 4.5 bar is maintained in the pressure tank (- 6 -), as the pressure holding non-return valve (-7-) still remains closed at this pressure level.

• The water supply of the screw compressor (- 4 -) is provided by the drop in pressure between the pressure tank (-6-) and the injection site in the screw compressor.

• If pressure in the load system falls below the minimum pressure programmed on the control system, the solenoid valve (-23-(Y4)) is energized (closed) and solenoid valve (-29-(Y11)) is energized and opened. Pressure then continues to build up in the pressure reservoir (- 6 -).

• At a tank pressure of ca. 4.5bar/65 PSI, the pressure holding non-return valve (- 7 -) opens.

• The compressed air transportation into the mains has begun.

Stopping the system:

• After pressing the OFF button on the control panel of the compressor control system Delcos-3100, the magnet valve (- 23 - (Y4) is de-energized (opened) and the solenoid valve (-29-(Y11)) is energized (opened) when the drive motor is running.

• The pressure reservoir (-6-) is depressurized to a constant pressure of 4 to 4.5 bar.

• The drive motor (-3-) reduces its number of revs to the set minimum value and comes to a standstill after 30 seconds have passed.

• Once the drive motor has stopped, solenoid valve (-29-(Y11)) is deenergized (closed) and the remaining pressure in the reservoir is discharged via nozzle (-34-).

Speed control operation

Speed is controlled using a software-implemented PI regulator that adapts the RPMs according to the need for compressed air.

The controller attempts to maintain the mains pressure between the values set in the control for max. and min. mains pressure(target pressure).

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4. Design and functioning

24

Automatic operation

• If the mains pressure achieves the preset maximum value, then the electric motor (-3-) will have its speed lowered in order to allow for the delivery amount to adapt to the actual need for compressed air.

• If the motor has reached minimum speed and the load-system pressure continues to rise, solenoid valve (-23-(Y4)) is deenergized (opened) and solenoid valve (-29-(Y11)) continues energized (open). Reservoir pressure is reduced to approx. 4 to 4.5 bar and the pressure-maintenance valve (-7-) closes.

• This way, no more compressed air will be supplied to the mains.

• If the mains pressure does not drop to the target value within the programmed follow-up time, then the system will shut down.

• If the target value is achieved before the expiration of the programmed motor follow-up time, then the magnet valve will again be energized (-23-(Y4)).

• The system will then go into load runs.

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5. Transport and installation

25

5 Trans port and i ns tall ati on

5.1 Transport

Fig. 7

Note

Before transporting the unit, remove the doors.

Danger

The compressor must be lifted using a suitable forklift truck which complies with the local safety regulations.

The length of the forks must correspond at least to the width of the unit (see Chapter 10.2). Before lifting, all loose or slewable parts of the machine have to be firmly secured.

It is strictly prohibited to work or stand in the danger zone of a lifted load.

The proper lifting of the load (according to the operating instructions of the load suspension device) has to be ensured.

Important

Never lift or lash the compressor and its hood via the enclosure. The screw compressor is lifted with the help of a fork lift truck (Fig. 7). The separation of the forks and their length must be taken into account for transportation.

Only use the identified lifting points. Do not slide the unit when it is standing on the floor.

Weights

The values listed below are approximate values, they refer to a screw compressor unit including water fill:

EnviroAire VS 50 air-cooled: 1941 kg EnviroAire VS 75 air-cooled: 2091 kg EnviroAire VS 50 water-cooled: 1841 kg EnviroAire VS 75 water-cooled: 1991 kg EnviroAire VS 110 water-cooled: 2191 kg

5.2 Installation

Fig. 8

Danger

• The weight carrying capacity of the foundation has to be taken into account when installing the compressor.

• Provide for a solid and plane base.

• The system may not be operated on the transport pallet.

• The intakes are to be located so that no hazardous constituent (solvent vapour, etc., but also dusts and other hazardous material) can be sucked in. This applies also to flying sparks.

• Pipes and/or other parts with a surface temperature higher than 70 °C/158 °F have to be suitably identified and secured against touching.

See also the safety regulations in chapter 3 of the operating instructions.

Important

The operator has to provide adequate ventilation for the compressor station.

The screw compressor unit has to be levelled. A minimum distance from walls, other machines, etc. should be maintained so that there is sufficient clearance for maintenance and repair work (Fig. 8).

During operation of the screw compressor unit, heat is generated by the electric motor and the compression process. The screw compressor radiates a part of this heat into the surroundings.

Proper ventilation has a considerable effect on the service life and the performance of a compressor.

A = 1m / 39,4“ B = 1m / 39,4“

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6. Preparations for commissioning

26

6 Preparati ons f or commiss ioning

6.1 Cooling air volume/minimum cross

Fig. 9 a

1 Cooling air intake 2 Cooling air outlet The cooling air volume required by these screw compressors is as follows:

EnviroAire VS 50-75 air-cooled: approx. 280 m³/min EnviroAire VS 50-75 water-cooled: approx. 115 m³/min EnviroAire VS 110 water-cooled: approx. 115 m³/min

Under unfavourable local conditions, we recommend the installation of venting ducts. However, the velocity of the cooling air should not exceed 5 m/s/17ft/sec. We recommend a minimum duct cross-section of approx. 0,93 m2/10 ft2.

Important

The stated minimum cross-section refers to a maximum duct length of 5 m/16,4 ft and a maximum of one bend. In the event of differing values (over 5 m/16,4 ft, more than one bend, filter cartridges, screens, etc.), please contact your technical adviser.

Gardner Denver screw compressors are rated for ambient temperatures and cooling temperatures of +2°C/ 35,6°F to +40°C/104°F (EnviroAire VS 75 air-cooled) and +45°C/113°F (EnviroAire VS 50 air-cooled and all water-cooled units). In the case of temperatures other than the above limiting values, please consult your technical adviser.

Note

In order to ensure a good heat dissipation, auxiliary fans should be rated to process approximately 15 to 20% more air volume than the total cooling air quantity required by the compressors installed in the compressed air station.

The figures below show the recommended ventilation sections arrangement:

Fig. 9 b

VENTILATOR

AIR INTAKE

AIR INTAKE

AIR CHANNEL

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6. Preparations for commissioning

27

6.2 Compressed air connection

Fig. 10

1 Compressed air connection

The compressed air line system is connected at the compressed air supply of the screw compressor ( - 1 - Fig. 10).

For this you should use a flexible connection (e.g. compressed air hose, compensator).

Europe-Version: EnviroAire VS 50-75 2" EnviroAire VS 110 3“

USA/CANADA-Version: EnviroAire VS 50-75 2" NPT EnviroAire VS 110 3“ NPT

Danger

When connecting the compressor on the mains side to the compressed air system available at the customer‘s end, check the operating temperatures and operating pressures required and examine the required connecting flange or the connection thread for proper type, size and functioning.

In the case of connections by means of connecting hoses, take appropriate measures to prevent whipping of the loose end in the event that the hose connection tears off.

Note

After-coolers, separators, collecting reservoirs and the compressed air lines must be equipped with drain facilities at their lowest points to drain collected liquids. These facilities have to be fitted to allow the observance of the draining of such liquids.

Hand-operated drain facilities have to be actuated in accordance with the operating instructions.

Automatic drain facilities have to be checked for proper function at regular intervals. When draining conden-sates into a collecting line, which also collects the condensate from other machines, make sure that the collecting line is free from back pressure at all lines.

When draining condensate, observe the corresponding regulations for waste water disposal.

6.3 Water connection for water-cooled units

Danger

If open cooling towers are used in the cooling water circuit, it is possible for legionella (Legionella pneumophila) and other bacteria to grow and spread. The growth and spread of bacteria must be prevented by corresponding service and water treatment methods.

Important

The cooling water must be drained if there is a danger of frost occurring or in case of a prolonged shut-down of the screw compressor system.

Always perform maintenance, servicing and repair work carefully.

Note

The following items must be noted for operation of water-cooled screw compressor systems:

• Cooling water must not be discharged indiscriminately into public waste-water and drain systems. Uncontrolled overflow of oil-separator basins into public waste-water systems must be prevented.

• Waste-water law provisions must be carefully adhered to.

The cooling-water circuit is completely installed in the screw compressor system.

The water connections on the water-cooled systems are as follows:

• Water inlet: G 1 1/4" (1 1/4" - NPT) • Water outlet: G 1 1/4" (1 1/4" - NPT)

Permissible cooling-water data:

• Cooling-water pressure: >>min./max.<<: 2/5 bar • Cooling-water inlet temp.: >>min./max.<<: 5 / 35 °C • Cooling-water outlet temp.: >>max.<<: 45 °C

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6. Preparations for commissioning

28

The cooling-water requirement at maximum operating pressure, referred to 12 to 15 °C water inlet temperature, Δ t = 10 °C, is:

EnviroAire VS 50 water-cooled approx. 80 l/min EnviroAire VS 75 water-cooled approx. 120 l/min EnviroAire VS 110 water-cooled approx. 170 l/min

This data is based on fresh water and the cooling-water quality recommended by Gardner Denver (see Chapter 6.3.1). Please contact Gardner Denver if the cooling-water data diverges from this.

The flow of cooling-water for the water cooler at commissioning can be adjusted by means of a manual control valve.

Note

Wherever possible, the cooling-water outlet temperature should be below 50 °C, in order to prevent excessive precipitation of limestone fur.

Fig. 11

1 Water inlet 2 Water outlet 3 Compressed-air connection

6.3.1 Limit values of the constituent elements in water

Note

The information set out below is intended for guidance and may differ under certain conditions of operation. The total composition and the operating temperature are always decisive. Warranty claims may not be derived from this..

Constituent elements of water / characteristic values

Circulating water

Pass-through

water

pH value (at 25 °C / 77 °C) 6 – 9 6 – 9

Carbonate hardness

CaCO3 < 100 mg/l (5.6 °dH)

< 50 mg/l (2.8 °dH)

Total hardness < 2 mmol/l < 200 ppm < 11.5 °dH

< 20 °fH

< 0.5 mmol/l < 50 ppm < 2.8 °dH

< 5 °fH

Chloride Cl- < 200 mg/l < 50 mg/l

Sulphate SO42- < 200 mg/l < 50 mg/l

Nitrate NO3− < 100 mg/l < 100 mg/l

Organic substances (KMnO4 absorption) < 25 mg/l < 10 mg/l

free aggressive carbonic acid CO2 < 20 mg/l < 20 mg/l

Silicium oxide SiO2 < 10 mg/l < 10 mg/l

free chloride Cl2 < 4 mg/l < 2 mg/l

Oxygen O2 < 2 mg/l < 2 mg/l

Ammonium NH4+ < 1mg/l < 1mg/l

Iron Fe < 0.2 mg/l < 0.2 mg/l

Manganese Mn <0.1 mg/l <0.1 mg/l

Sulphide S2- 0 0

Ammoniac NH3 0 0

Conductivity > 50. < 800 µS/cm

> 50. < 200 µS/cm

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29

6.4 Electrical connection

6.4.1 Electrical connection (EUROPE-Version only)

Recommended supply cable cross-sections and fuses

Compressor type Supply voltage [V]

Installed nominal motor power

[kW]

Fuse protection (slow-blow fuse)

[AgL]

Line cross section at 30 °C/86 °F

[mm2]

50 Hz Compressors

EnviroAire VS 50 380V 400V 50 125

125 3 x 50 PE 25 3 x 50 PE 25

EnviroAire VS 75 380V 400V 75 200

200 3 x 95 PE 50 3 x 95 PE 50

EnviroAire VS 110 380V 400V 110 250

250 3 x 120 PE 70 3 x 120 PE 70

60 Hz Compressors

EnviroAire VS 50 380V 440V 460V

50 125 125 125

3 x 50 PE 25 3 x 50 PE 25 3 x 50 PE 25

EnviroAire VS 75 380V 440V 460V

75 200 200 200

3 x 95 PE 50 3 x 95 PE 50 3 x 95 PE 50

EnviroAire VS 110 380V 440V 460V

110 250 250 250

3 x 120 PE 70 3 x 120 PE 70 3 x 120 PE 70

Notes on the table:

We do not know the cable type used by you, its length and the installation conditions (temperatures, grouping). The table above can therefore only be regarded as a guideline.

The supply cable cross-sections given in the table comply with VDE 0298, part 4 - table 13, column 7. (Rubber hose line at 30 °C/86 °F and max. line length of 50 m). In the case of differing conditions (line length, temperature and grouping), establish the cross sections in accordance with DIN VDE 0298, part 4 or BS7671 taking into account the cable type.

Important

If local regulations are stricter than the values specified above, observe the stricter regulations.

Compressor units are finished in the factory according to standard EN60204 (industrial machinery). Please observe the following important notes:

Danger

The power supply to the compressor side has to be fitted for industrial equipment and fulfilling the requirements of EN60204-1/IEC60204-1. To avoid strong damages and fire on the power electric components, any kind of operation outside of the stated limits of EN60204-1/IEC60204-1 is inadmissible.

The customer has to connect a main switch in the incoming line of the compressor unit (unless factory-mounted as special accessories) (DIN EN 1012 - 1).

If this switch does not provide short-circuit and overload protection for the system, suitable back-up fuses have to be installed according to EN 60269-1 (low voltage directive ) (see table).

The main switch must meet the requirements of the safety standard EN 60 204-1 (electrical equipment of machinery) as well as of EN 60947-2 (low- voltage switchgear and control gear (circuit-breakers)).

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30

The electrical connection and protective measures have to be installed in accordance with VDE, BS or local regulations. As a rule, additional instructions of the relevant power supplier have also to be adhered to.

The electrical connections must be made by an authorized specialist.

Attention: Interference voltage!

If external electric circuits, which cannot be cut out via the main switch, are connected to the control, these have to be identified according to EN60204. Warning signs have to be fixed near the main switch and near these electric circuits. In addition, these conductors have to be laid separately and/or identified by colors. Work on control cabinets may only be carried out by electrotechnical specialists. If the installation conditions of the system differ from the conditions described in EN60204, please contact your technical adviser.

To establish an electrical connection, proceed as follows:

Route the supply cable through the cable gland (-1 - Fig. 12) on the control cabinet and tighten screws.

Connect the supply line to the connecting terminals as shown in the circuit diagram.

Fig. 12

Checking the setting of the control-power transformer

The control-power transformer is factory-preset to the rated voltage. However, practice has shown that the actual supply voltage often differs from this value. In order to adjust the unit to the local conditions, the setting of the control-power transformer must be checked by measuring the control-power transformer output voltages during under load operation and, if required, re-set. Several tapping points are provided for this purpose (see circuit diagram). Fig. 14 illustrates an example.

Fig. 13

Danger

When carrying out adjustment work on the control power transformer, the unit must be electrically isolated and locked off.

Work on the control cabinet may only be carried out by electrotechnical specialist personnel.

Danger of electric shock from loaded condensers!

Please always first disconnect the system from the power supply and wait another 12 minutes before touching the electrical components. The power condensers require this time in order to discharge!

Important

A wrong setting of the control-power transformer jeopardizes the trouble-free operation of compressor units and can result in malfunction or damage.

The verification of the control-power transformer setting is a must during commissioning.

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31

6.4.2 Electrical connection (only USA/CANADA-Version) Recommended supply cable cross-sections and fuses for multi-wire cables or three current-carrying conductors in raceway based on 86 °F ambient temperature

Line cross section Compressor type

Supply Voltage [ V ]

Fuse(s) [ A ] 140 °F 167 °F 194 °F

EnviroAire VS 50 460 LPJ-125A 1/0 AWG 1 AWG 2 AWG

EnviroAire VS 75 460 LPJ-200A 250 MCM 3/0 AWG 3/0 AWG

EnviroAire VS 110 460 LPJ-225A 300 MCM 4/0 AWG 3/0 AWG

An adequate electrical power supply of the correct voltage must be provided. All control enclosure wiring has been completed at the factory.

The electrical supply should be equipped with a fused line disconnect switch or circuit breaker so that electrical power may be disconnected while the unit is being serviced.

The fuse line disconnect should be located and moun-ted in accordance with all state, local, and national regulations.

The unit must be properly grounded to provide adequa-te ground fault protection. As a guide, it is suggested that the ground wire be equal in size to one of the conductors which feeds the compressor motor circuit. Make certain the ground wire connections are clean and tight.

The wire used to feed the compressor circuit should be selected and sized based on the following conditions:

1. Motor full load amperage plus service factor.

2. Ambient temperature in the area where the wire is located.

3. Length of wire

4. Insulation type

This information may be found in the latest edition of the National Electrical Code.

When installing a unit in a "Hazardous Location"; that is in a location where fire or explosion is a definite hazard, refer to the appropriate section of the National Electrical Code for further information.

Caution

IN ALL CASES, THE LOCAL, STATE, AND NATIONAL ELECTRICAL CODES MUST BE STRICTLY FOLLOWED.

Danger

The power supply to the compressor side has to be fitted for industrial equipment and fulfilling the requirements of EN60204-1/IEC60204-1. To avoid strong damages and fire on the power electric components, any kind of operation outside of the stated limits of EN60204-1/IEC60204-1 is inadmissible.

To establish an electrical connection, proceed as follows:

Route the supply cable through the cable gland (- 1 - Fig. 12) on the control cabinet and tighten screws.

Connect the supply line to the connecting terminals as shown in the circuit diagram.

Fig. 12

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6. Preparations for commissioning

32

Checking the setting of the control-power transformer

The control-power transformer is factory-preset to the rated voltage. However, practice has shown that the actual supply voltage often differs from this value. In order to adjust the unit to the local conditions, the setting of the control-power transformer must be checked by measuring the control-power transformer output voltages during under load operation and, if required, re-set. Several tapping points are provided for this purpose (see circuit diagram).

Fig. 13

Danger

When carrying out adjustment work on the control-power transformer, the unit must be electrically isolated and locked off.

Work on the control cabinet may only be carried out by electrotechnical specialist personnel.

In case of engines with speed control only:

Danger of electric shock from loaded condensers!

Please always first disconnect the system from the power supply and wait another 12 minutes before touching the electrical components. The power condensers require this time in order to discharge!

Important

A wrong setting of the control-power transformer jeopardizes the trouble-free operation of compres-sor units and can result in malfunction or damage.

The verification of the control-power transformer setting is a must during commissioning and periodic inspection/maintenance, as the voltage supply conditions may vary.

The correct setting should be checked during under load operation of the unit by measuring the control power transformer output voltages.

6.5 Water supply

6.5.1 First-time water filling

Important

For first-time filling, only water with the following threshold limits should be used:

Conductivity 50 - 150 µS / cm pH value 6 - 8 Overall hardness (CaCO3) < 3° dH Iron (Fe) < 0.3 mg / L Chloride (Cl-) < 50 mg / L Sulphate (SO4-2) < 50 mg / L Nitrate (NO3-) < 0.3 mg / L Ammonium (NH4+) < 0.3 mg / L

The Gardner Denver water analysis set can be used to determine the water quality.

If deviant values are present, we recommend use of the demineralisation unit from Gardner Denver for first-time filling.

For a more detailed description, see Section 6.6

Fig. 14

1 Manual valve – water in 2 Water level switch 3 Water supply 4 Fill level marking "Below" 5 Fill level marking "Above" 6 Water level indicator 7 Pressure tank

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33

Perform first-time water filling as follows:

• Open manual valve – water in (-1- Fig. 14). Water flows through the inlet (-3- Fig. 14) into the pressure tank (-4- Fig. 14).

• Fill up to the top level of the float switch (-2- Fig. 14).

• Close manual valve – water in (-1- Fig. 14). Start system and monitor the water level.

• Once the lower marking has been reached, turn off system via the emergency off.

• Open manual valve – water in (-1- Fig. 14).

• Fill with water up to the top level of the float switch (-2- Fig. 14).

• Close manual valve – water in. Start system and monitor the water level.

• Once the lower marking has been reached, turn off system via the emergency off.

• Repeat this filling process until the water level has balanced out between the lower and upper float switch (-2- Fig. 14).

6.5.2 Water supply during operation

Important

The water-supply quality must not exceed the following limits for continuous operation:

Conductivity < 2000 µS/cm pH-Value 6,5 - 8 Overall hardness (CaCO3) < 20 °dH Iron (Fe) < 0,3 mg / L Chloride (Cl-) < 250 mg / L Sulphate (SO4-2) < 240 mg / L Nitrate (NO3-) < 50 mg / L Ammonium (NH4+) < 0,5 mg / L

Important

For long-term operation, the water quality of the internal circulation water (water injection) must not exceed the following limit values:

Conductivity 50 - 150 µS / cm pH value 6 - 8 Overall hardness (CaCO3) < 3° dH Iron (Fe) < 0.3 mg / L Chloride (Cl-) < 50 mg / L Sulphate (SO4-2) < 50 mg / L Nitrate (NO3-) < 0.3 mg / L Ammonium (NH4+) < 0.3 mg / L

6.6 Demineralisation unit

Important

The following points are to be considered when using the demineralisation unit:

1) To be used only for the first filling of the compressor.

2) The quantity of water is reduced to approx. 1 litre/minute due to the integrated flow limiter (- 2 - Fig. 15).

3) Complete filling can take up to 90 minutes.

4) The cartridge is designed for a maximum water quantity of 45 litres.

5) After initial filling the water supply to the compressor should be taken directly from the mains.

Fig. 15

C

Fig. 16

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6. Preparations for commissioning

34

Undertake the initial filling with the demineralisation unit as follows: • Apply water connections for the inflow (-A - Fig. 15)

and the connection between the outflow (-B- Fig. 15) with the water inflow from the compressor (-C- Fig. 16)

• Open stopcock for filling process (-3- Fig. 14). If necessary press ventilation button on the filter head of the demineralisation unit. The water level in the filter rises.

• Open manually operated valve – water on (-1- Fig. 14). The water flows via the inflow (-3- Fig. 14) into the pressure vessel (-4- Fig. 14).

• Fill water to upper level of float switch (-2- Fig. 15). This process may take up to 30 minutes.

• Close manually operated valve – water on (-1- Fig. 14); start the system and observe the water level.

• When the lower mark is reached, switch system off via the emergency stop.

• Open manually operated valve – water on (-1- Fig. 14).

• Fill water to upper level of float switch (-2- Fig. 14) again.

• Close manually operated valve – water on. Start system and observe water level.

• When the lower mark is reached, switch system off via the emergency stop.

• Continue this filling procedure until the water level between the lower and upper switch set point of the float switch (-2- Fig. 14) finds its level.

• After filling, remove the connection between outflow (-B- Fig. 15) and the water inflow on the compressor.

• Connect water supply directly to the mains.

6.7 Extraction of water samples

Danger

Water samples must only be extracted when the rotary screw compressor unit is stationary and depressurised.

Switch off the compressor and ensure that it is depressurised.

• Open the ball valve at the extraction site (-2- Fig. 20 and Fig. 21) and to flush the extraction site, allow around 0.1 l to drain into an appropriate vessel.

• Fill the vessel provided (water analysis set) with the sample quantity (approx. 0.3 l).

• After extracting the sample, close the ball valve.

• Check the water level on the water level indicator (-6- Fig. 14) and add water if necessary (see Chapter 6.5 Water supply).

6.8 Sound pressure level Sound pressure level measured in dB(A) according to PN8NTC 2.2 under a 70% load at a distance of 1 m (tolerance: ± 3 dB(A)):

EnviroAire VS 50 72 dB(A) EnviroAire VS 75 75 dB(A) EnviroAire VS 110 75 dB(A)

Subject to technical revision.

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7. Commissioning

35

7 Commissioni ng

7.1 First commissioning

Danger

Make sure before commissioning that nobody is in the danger zone of the screw compressor.

Only operate the screw compressor with closed access panels.

Important

Although every Gardner Denver screw compressor has been subjected to a test run at the factory and has again been thoroughly inspected before shipment, damage during shipment cannot be excluded. For this reason, every screw compressor should be checked once again for damage before being commissioned. In addition, it should be observed during the first operating hours.

If the screw compressor is newly connected to a power supply, check the direction of rotation of the drive motor!

The screw compressor is provided without cooling water and may only be started after it has properly been filled with water (also see Chapter 6.5).

When storing the screw compressor system or in the event of a longer period of downtime, if there is the risk of frost ( t < 1°C) the cooling water should be completely discharged.

The screw compressor unit is completely factory-assembled. It can be directly connected to the com-pressed air mains by means of a flexible connection.

First commissioning is carried out as follows:

• Remove transport guards, if fitted.

• Check the water level in the pressure reservoir (see also chapter 6.5) (Fig. 14)

• Check settings of the fan motor protection switch (see Chapter 6.4)

• Check the setting of the control-power transformer (see also chapter 6.4).

• Check and re-tighten all connecting terminals of the electrical control.

• Open isolator valves between the screw compres-sor, reservoir and pipe.

• Ensure cooling water supply in accordance with Chapter 6.3 (only water-cooled units).

• Operate main power supply switch.

• After the power supply was switched on, all LEDs on the compressor control Delcos 3100 light up for a display test. The fault shown on the display [FAULT POWER LOSS] must be acknowledged before the unit can be started. To this end, press the acknowledgement pushbutton [Θ] (- 4 - Fig. 18).

• After the acknowledgement, the message [READY TO START] appears on the display unless another fault is present.

• The factory setting of the setpoint value for the network pressure (upper and lower switching point) is saved in the compressor control Delcos-3100. These settings can be checked or changed in the [CONTROL MENU] of the compressor control Delcos 3100 (see operating instructions, chapter 1 of the compressor control Delcos 3100).

• Casing can be temporarily opened for rotation direction checks. The direction of rotation of the drive motor and the fan motor is indicated by the arrow sticker (Fig. 17). The proper rotation direction of the fan motor can also be checked on the basis of the cooled airflow direction (Fig. 9 a).

Important

With a wrong direction of rotation, shut down the unit immediately by pressing the emergency STOP button (-1- Fig. 18) (not the [O] ), otherwise the compressor may be seriously damaged, even during short periods of operation.

The access panels may temporarily be opened for checking the direction of rotation (wear ear protectors).

Danger

Beware of rotating parts! Rotating parts can lead to injuries. Stay at a safe distance away from rotating machine parts!

Press the START button [ I ] (- 2 - Fig. 18) and check the direction of rotation. With a wrong direction of rotation, press the emergency STOP button (- 1 - Fig. 18) immediately and correct the direction of rotation.

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7. Commissioning

36

1 2

Fig. 17

1 Direction of rotation of the drive motor 2 Direction of rotation of the fan motor

Note

For switching the compressor off “normally”, use only the stop push-button (- 3 - Fig. 18), but not the EMERGENCY STOP push-button (- 1 - Fig. 18). After having been switched off, the compressor is aftercooled for 30 seconds (soft stop).

Temperature start-up protection

The screw compressor unit will not start up if the ambient temperature is lower than + 2 °C/35,6 °F.

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7. Commissioning

37

Display of the compressor control Delcos 3100

Fig. 18

1. EMERGENCY STOP pushbutton 2. Start push-button [ I ] 3. Stop push-button [ O ] 4. Acknowledgement push-button [ Θ ] 5. Final compression temperature 6. Final compression pressure 7. Network pressure

The final compression temperature (- 5 - Fig. 18), the final compression pressure (- 6 - Fig. 18) and the network pressure (- 7 - Fig. 18) are shown on the keypad of the compressor control Delcos 3100.

7.2 Routine commissioning

Danger Make sure before commissioning that nobody is in the danger zone of the motor/screw compressor. After completion of work: Verify that all safety devices have been refitted and that all tools have been removed. Only operate the screw compressor unit with closed access panels. For routine commissioning, proceed as follows: • Check water level in the pressure reservoir (see

also chapter 6.5).

• Open shut-off valves between the screw compressor, reservoir and pipe.

• Ensure cooling water supply in accordance with Chapter 6.3 (only water-cooled units).

• Switch on the power supply master switch.

• After the power supply was switched on, all LEDs on the compressor control Delcos 3100 light up for a display test. The fault shown on the display [FAULT POWER LOSS] must be acknowledged before the unit can be started. To this end, press the acknowledgement push-button [Θ] (- 4 - Fig. 18).

• After the acknowledgement, the message [READY TO START] appears on the display, unless another fault is present.

• Press START button [ I ] (- 2 - Fig. 18).

• To switch off the compressor in the usual way use the STOP button (- 3 - Fig. 18) and not the emergency STOP button (- 1 - Fig. 18). After shutdown the compressor has a run on time of 30 seconds (soft-stop).

Start-up protection of the electric motor

The screw compressor unit will not start up if the final compression pressure is more than 4 bar/58 PSI.

Temperature start-up protection

The screw compressor unit will not start up if the ambi-ent temperature is lower than + 2 °C/35,6 °F.

7.3 Commissioning after malfunction

Important

Do not switch the screw compressor on repeatedly without having rectified the malfunction, since this may cause considerable damage to the machine.

Re-start after an automatic shutdown due to a malfunction as follows:

• Faults are shown on the display of the compressor control Delcos 3100 in the form of text.

• Turn master switch off.

• Eliminate fault.

• Turn master switch on.

• Press acknowledgement push-button [Θ] (- 4 - Fig. 18)

• After the acknowledgement, the message [READY TO START] appears on the display, unless another fault is present.

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8. Service and maintenance

38

8 Service and mai nte na nce

8.1 Maintenance recommendations

Note

The screw compressor unit can only operate to your complete satisfaction when the maintenance work is carefully carried out at the specified intervals.

In order to facilitate this task, the scope of supply of the screw compressor unit comprises the “Maintenance and inspection manual for Gardner Denver compressors”, in which you can list your performed maintenance work at the specified intervals.

You can also have this maintenance work performed by our trained technicians. Please ask your Gardner Denver distributor for a maintenance contract.

8.2 Maintenance electric motor The electric motor is permanently lubricated. The maintenance of the electric motor is to be performed in line with the motor operating instructions.

8.3 Maintenance schedule

Danger

When performing control, adjusting and mainte-nance work, be careful with hot surfaces of machine parts.

Checks and maintenance work may only be carried out when the following points are observed:

• Press the STOP button on the control panel and wait until the screw compressor unit has come to rest and the screw compressor unit is depressurized

• Switch the master switch to "O" (OFF) and secure it against reactivation.

• The pressure display does no longer indicate pressures < 0.3 bar/4,4 PSI.

• Shortly after switching the screw compressor off, the system can contain a low residual pressure.

• Warning: Electrical voltage: Only work on the screw compressor unit when it is disconnected.

• Danger of electric shock from loaded condensers! Please always first disconnect the system from the power supply and wait another 12 minutes before touching the electrical components. The power condensers require this time in order to discharge!

Intervals are valid for normal industrial environments and operating conditions.

In the case of a very dirty atmosphere, the cleaning intervals have to be shortened as required.

For order numbers see the spare parts list.

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8. Service and maintenance

39

Due at x service hours

2,00

0 h

4,00

0 h

6,00

0 h

8,00

0 h

10,0

00 h

12,0

00 h

14,0

00 h

16,0

00 h

At the latest after x months Com

miss

ioni

ng

3 M

6

M

9 M

12

M

15 M

18

M

21 M

24

M

Package A

Package B

Package C

Maintenance every 2000 h, although at least every 3 months:

Cleaning/replacement of cooling air inlet filter

Maintenance every 4000 h, although at least every 6 months:

Replacement of air filter cartridge

Replacement of water filter cartridge

Replacement of prefilter RO unit

Inspection of the compressor stage *

Only EnviroAire VS 75-110: Replace the bearing flushing system of the blow-off silencer *

Maintenance every 8000 h, although at least each year:

Checking/tightening of connecting terminals in the switch cabinet/ and checking of the “control transformer” setting

Checking/tightening screw connections

Checking/cleaning water level switch

Replace O-ring of pressure holding non-return valve

Check the non-return valve (centre of rotation) for wear and replace if necessary *

General maintenance/cleaning

Safety valve / functional test at least once a year

Maintenance every 16000 h, although at least every 2nd year:

Replace RO membrane

Rework/replace water valves *

These maintenance intervals must be observed!

x For your own benefit, put a cross on the servicing schedule against maintenance work when performed.

* We recommend that you have the work on these parts be performed by a Gardner Denver company or by an authorised dealer.

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8. Service and maintenance

40

8.4 Change of air intake filter

Fig. 19

1 Air intake filter 2 Intake filter monitor

Danger

Only perform checks and carry out work on the screw compressor when the unit is out of operation and depressurized!

Important

Never operate the screw compressor unit without the air filter (even a short operating time without this filter can result in considerable damage to the machine)!

As a standard, the air filter is provided with a visual in-take filter monitor (- 2 - Fig. 19), which indicates clog-ging of the air filter cartridge.

When the red service field of the intake filter monitor is visible and remains clicked into position while the screw compressor is out of operation, replace the air filter cartridge.

However, the air filter cartridge should be replaced at the latest as specified in chapter 8.3, maintenance item “Change of air filter cartridge“. Check air filter at least once a week or, if required, daily for the accumulator of dust. When carrying out maintenance work, make sure that no dirt gets to the clean air side of the air filter.

Changing intervals for air filter cartridge

The operating conditions (e.g. coolant temperatures), the operating modes and the quality of the intake air (e.g. content of dust, content of gaseous foreign matter such as SO2, solvent vapours, etc.) have a strong influence on the service life of the filters (air filters, water filters, fine separators).

Where such conditions exist the filter element may require changing more frequently.

Change the air filter as follows:

• Pull snap latch outward and remove housing base.

• Detach air filter cartridge while slightly turning it.

• Carefully insert new air filter cartridge in the housing.

• Close air filter with housing base. The snap latches must click into position.

8.5 Change water filter

Fig. 20 EnviroAire VS 50-75

Fig. 21 EnviroAire VS 110

1 Water filter 2 Extraction site for water sample

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8. Service and maintenance

41

Danger

Only change water filter when the compressor system has been shut down and depressurized!

Make sure that it is leak tight!

You will find the changing intervals listed in the maintenance schedule.

Perform the water filter change as follows:

• Turn off compressor and make sure that it is depressurized and volt-free.

• Let cooling water drain off via the extraction site (-2- Fig. 20) and drain screw on the water filter housing (-1- Fig. 20).

• Open filter housing and remove filter elements.

• Clean the filter head and insert a new housing seal.

• Insert a new filter element and close filter housing again.

• Re-close drain valve and screw.

Changing times for the water filter

The operating conditions (e.g. cooling medium temperatures), the operating modes and the quality of the suctioned air (e.g. dust content, content of gaseous foreign matter such as SO2, solvents, etc.) has a strong influence on the filter service life.

In these operational cases, shorter change intervals are possible.

8.6 Replace prefilter RO unit

Fig. 22

1 RO membrane cartridge 2 Prefilter RO unit 3 Permeate pump

Danger

Only perform all controls and works after the compressor system has been shut down and depressurized!

Note

Before the prefilter element can be installed, the element should be rinsed out with clean water so that all coaldust has been removed.

Perform the prefilter change as follows:

• Close the main water supply connection and valve on the storage tank.

• Screw off the filter housing (-2- Fig. 22) and remove the filter element.

• Insert a new filter element and hand tighten the filter housing.

• Re-open the main water supply and the storage tank valve.

Changing times for prefilter RO unit

You will find the changing intervals listed in the maintenance schedule (W3).

The quality of the main water supply has a strong influence on the filter service life.

In the event of unfavourable conditions, shorter changing intervals are possible.

In order to determine the water quality, a water sample can be extracted as needed (see chapter 6.7).

8.7 Change the RO membrane cartridge Danger

Only perform all controls and works after the compressor system has been shut down and depressurized!

Change the RO membrane cartridge as follows:

• Close the main water supply connection and valve on the storage tank.

• Remove the lines to the membrane (-1- Fig. 22).

• Remove the old membrane cartridge and replace with a new one.

• Refit lines to the RO membrane cartridge.

• Re-open the main water supply and the storage tank valve.

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8. Service and maintenance

42

8.8 Check and clean water level switch

Danger

Only perform all controls and works after the compressor system has been shut down and depressurized!

• Remove lower hose connection.

• Remove float housing.

• Check to see if the float moves easily on the shaft.

• Clean shaft as needed.

• Re-close float housing. Use the O-ring supplied in the maintenance kit.

• Refit lower hose connection.

8.9 Safety valve

Fig. 23

1 Safety valve 2 Valve cap

Testing the safety valve

The valve should be tested on a separate compressed air line in accordance with local legislation.

Operate the safety valve (- 1 - Fig. 23), depending on the type of valve:

Slightly turn the valve cap (-2- Fig. 23) (1-2 turns), and then re-close it.

Actuation of the bleeding lever/pulling ring

Danger

Never operate a screw compressor system with a defective safety valve or without safety valve!

8.10 Connecting terminals in the switch cabinet/control transformer setting

Danger

In the case of electric voltage:

• Actuate STOP button at the operating panel • Set the customer-fitted main power switch to

"O" (OFF).

The connecting terminals in the switch cabinet have to be checked and, if required, re-tightened during first commissioning and later on in line with the maintenance schedule.

The setting of the control transformer must be checked according to chapter 6.4 “Electrical connection”.

8.11 Fittings The fittings of the air and water circuits have to be checked and, if required, re-tightened according to the maintenance schedule.

Check the hose and piping for unsealed areas.

8.12 General maintenance and cleaning

Important

Blow off the screw compressor unit with compressed air at the specified intervals (never direct compressed air towards persons) paying particular attention to:

• Regulating elements • Fittings • Compressor block • Cooler • Electric motor • Remove and clean the dirt trap strainer (W-

version only)

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8. Service and maintenance

43

8.13 Clean / change filter with cooling air inlet and control cabinet inlet

Fig. 24 a EnviroAire VS 50-75

Fig. 24 b EnviroAire VS 110

1 Filter mat cooling air inlet 2 Mounting bolts 3 Terminal strip 4 Panel 5 Filter mat control cabinet 6 Sound-proofing element 7 Inlet filter

Danger

Only perform filter mat change after the compressor system has been shut down and depressurized!

Perform filter mat change as follows:

a) Filter mat, cooling-air inlet

• Remove fixing bolts (-2- Fig. 24) and clamping strip (-3- Fig. 24) (not on EnviroAire VS 110).

• Take out the filter mat (-1- Fig. 24) and clean it, replace it if damaged.

• Return the filter mat to the silencer chamber (-6- Fig. 24).

• Secure the filter mat using the clamping strip and the fixing bolts.

b) Control-cabinet filter mat

• Remove the fixing bolts (-2- Fig. 24) and panel (-4- Fig. 24).

• Remove and clean the control-cabinet filter mat (-5- Fig. 24) after slackening the securing nut, replace if damaged.

• Position the filter mat under slight tension on the bolts and secure using the nuts.

• Position the panel on the silencer chamber and fix it in place using the bolts (-2- Fig. 24).

c) Control-cabinet inlet filter

• With the panel removed (-4- Fig. 24) (see b), remove the grille for the two inlet filters (-8- Fig. 24) (use a screwdriver, for example, to ease them out).

• Remove the filter mats and clean them, replace if damaged.

• Insert the cleaned or new filter mats into the grille (the less dense side of the mat should be facing toward the air-inlet side).

• Replace the grille on the filter housing.

• Replace the panel (-4- Fig. 24) as described in “b”.

• Remove the fixing bolts and clamping strip (- 2 - and -3- Fig. 24) and panel (-4- Fig. 24).

• Remove the silencer-chamber filter mat (- 1 - Fig. 24) and control-cabinet filter mat (-5- Fig. 24) from the silencer chamber (- 6 - Fig. 24) and panel (- 5 - Fig. 24) and clean them, replace if damaged.

• Insert the silencer-chamber filter mat into the silencer chamber again (- 6 - Fig. 24) and replace the control-cabinet filter mat into the panel (- 5 - Fig. 24) and tighten using the fixing bolts (- 2 - Fig. 24) on the compressor.

Cleaning:

Clean the filter mat by brushing or washing.

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8. Service and maintenance

44

Important

Never install the filter mat in a wet or moist state!

Changing times for the filter mat

The operating modes and the quality of the suctioned air (e.g. dust content) has a strong influence on the filter service life.

The filter should be checked on a weekly basis, eventually daily basis, for dust build-up.

In these operational cases, shorter change intervals are possible.

8.14 Cleaning of the bearing flushing system

Fig. 25

Danger

Only ever clean the blow-off silencer and ejector nozzle with the compressor stopped and depressurized..

Check the blow-off silencer (-1+2- Fig. 25) and ejector nozzle (-3- Fig. 25) for fouling. Clean or replace if severely fouled. The blow-off silencer must be replaced in accordance with the data in Section 8.3 at the latest, however.

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8. Service and maintenance

45

8.15 Inspection of the compressor stage

Fig. 26

Danger

Only perform checks and carry out work on the screw compressor when the unit is out of operation and depressurized!

Caution when draining hot water: risk of scalding!

Allow the unit to cool down first.

Important

When removing the cover, water (12 litres) may escape from the compressor. Please place an appropriate vessel underneath it to collect the water.

Perform an inspection as follows:

• Shut down the machine.

• Switch off the main switch or disconnect the machine from the power supply.

• Remove the retaining bolts from the side cover of the compressor and take off the cover (-1- Fig. 26).

• Assess the condition of the compressor. The inspection plan describes everything you need to consider.

• Attach the side cover with a new seal. Insert the screws to a torque of 25 Nm (EnviroAire VS 50) or 49 Nm (EnviroAire VS 75-110).

• Check the water level on the water level indicator (-6- Fig. 14) and add water if necessary (see Chapter 6.5 Water supply).

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9. Trouble-shooting

46

9 Trouble -s hooti ng

In the case of faults or warnings that are detected by the compressor control Delcos-3100, please refer to the chapter “Fault/warning table” in the operating instructions of the DELCOS 3100.

Malfunction Possible cause Remedy

1. No operating or control voltage 1. Check fuses, main switch and supply line

Unit cannot be started

2. Malfunction not acknowledged 2. Acknowledge fault message

3. Pressure reservoir not depressurized 3. Wait until depressurized Screw compressor does not start up, when reservoir pressure is > 0.8 bar/11,6 PSI

4. Electric motor defective 4. Check connections, winding, etc.

5. Compressor defective 5. Turn the compressor manually; if required, replace

6. Ambient temperature less than +2 °C/35,6 °F

6. Make sure that the ambient tempera-ture is not less than +2 °C/35,6 °F; install an auxiliary heater, if required

7. Remote control/timer has been activated via terminal strip

7. Deactivate remote control/timer

8. Mains pressure exceeds the lower switching point

8. Wait until the mains pressure has fallen below the lower switching point

Unit stops during the start-up phase

1. Short-circuit in the unit 1. Determine and eliminate cause; replace defective fuses

2. Connecting terminals in the switch cabinet are loose

2. Check and re-tighten

3. Maximum motor switching cycles exceeded due to too frequent manual on and off-switching

3. Avoid frequent manual on and off-switching, let electric motor cool down

1. Mains pressure sensor set too low 1. Check, re-set Unit does not reach the set mains pressure

2. Excessive air consumption 2. Reduce consumption or cut in a further compressor

3. Air filter clogged 3. Replace air filter cartridge

4. Heavy leakage in the compressor system 4. Check unit

Unit switches off 1. Ambient temperature too high 1. Ventilate compressor room

2. Electric motor defective 2. Check electric motor and thermistor

3. Fan defective 3. Check/replace fan

4. Sensor, connections or lines defective 4. Check sensors, connections and lines

5. Cross section of the electric supply lines too small

5. Measure power requirement, if necessary, replace lines

6. Water level too low 6. Top up water in the pressure reservoir

7. Excessive water temperature 7. Check water cooler and fan/ Check water thermostat

Excessive idling pressure

1. System not unloaded 1. Check intake regulator Check solenoid valves

Water in the air filter 1. Water stop valve not closing 1. Check/ replace water stop valve

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9. Trouble-shooting

47

Malfunction Possible cause Remedy

Safety valve opens 1. Safety valve defective 1. Replace

2. Pressure holding valve defective 2. Check / Replace

3. Mains pressure sensor defective 3. Replace mains pressure sensor

4. Electronics defective 4. Replace electronics

Danger

Never operate the screw compressor with defective safety valve!

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10. Annex

48

10 Annex

10.1 Technical data

10.1.1 Technical data air-cooled EnviroAire VS 50 Maximum operating pressure bar 10.0 Minimum operating pressure bar 5.0 Ambient temperature °C 2 to 45 Outlet temperature above ambient temp. °C 15 (at max. rpm) Sound pressure level (to Cagi Pneurop PN8NTC2) dB(A) 72 (at 70% load)

Electrical data

Nominal electric motor power kW 50 Voltage (frequency) 380 - 460V (50, 60Hz) Max. total current consumption at 380V/400V/440V/460V A 104 / 95 / 90 / 86 Starting current Max. full-load current Motor protection type IP-23 Switched reluctance motor Nominal speed min./max. rpm 1200 to 3700 Nominal fan motor power kW 2 x 2.25 (IP-54) Recommended cable cross-section mm2 3 x 50 PE 25 Recommended fuse size A 125

Cooling

Cooling air flow through ventilator m3/min 280 Discharged heat quantity % max. 95% of the total power consumption Connection mass cooling air inlet mm 1120 x 1037 Connection mass cooling air outlet mm 2x (895 x 895) Cooling air outlet temperature above ambient temp. °C 15 Max. allowable pressure drop in duct at ambient 35°C / 45°C Pa 90 / 40

Weights, dimensions and fill amounts

Compressor water filling l 91 ca. drinking water consumption in 24h ( for a water change in 24h at 3.5bar water mains pressure) l 38

Drinking water mains pressure bar 2.5 ... 6.0 Residual water content in compressed air g/m3 0.1..0.2 Compressed air connection R 2" Weight kg 1850 Dimensions L x W x H mm 2158 x 1412 x 1971

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10. Annex

49

10.1.2 Technical data water-cooled EnviroAire VS 50 Maximum operating pressure bar g 10.0 Minimum operating pressure bar g 5.0 Ambient temperature °C 2 to 45 Outlet temperature above ambient temp. °C 15 (at max. rpm) Sound pressure level (to Cagi Pneurop PN8NTC2) dB(A) 72 (at 70% load)

Electrical data

Nominal electric motor power kW 50 Voltage (frequency) 380 - 460V (50, 60Hz) Max. total current consumption at 380V/400V/440V/460V A 101 / 92 / 87 / 83 Starting current Max. full-load current Motor protection type IP-23 Switched reluctance motor Nominal speed min./max. rpm 1200 to 3700 Nominal fan motor power kW 1 x 0.37 (IP-54) Recommended cable cross-section mm2 3 x 50 PE 25 Recommended fuse size A 125

Cooling

Cooling air flow through ventilator m3/min 115 Cooling water quantity l/min 80 Discharged heat quantity % max. 10% of the total power consumption Cooling water inlet temperature °C 5 / 35 Cooling water outlet temperature °C 15 / 45 Cooling water pressure bar (g) 2 - 5 Pressure loss, cooling-water side bar 0.8 Cooling water connection R 1 1/4" / R 1 1/4"

Weights, dimensions and fill amounts

Compressor water filling l 91 ca. drinking water consumption in 24h ( for a water change in 24h at 3.5bar water mains pressure) l 38

Drinking water mains pressure bar 2.5 ... 6.0 Residual water content in compressed air g/m3 0.1 … 0.2 Compressed air connection R 2" Weight kg 1750 Dimensions L x W x H mm 2158 x 1412 x 1971

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10. Annex

50

10.1.3 Technical data air-cooled EnviroAire VS 75 Maximum operating pressure bar 10.0 Minimum operating pressure bar 5.0 Ambient temperature °C 2 … 40 Outlet temperature above ambient temp. °C 20 (at max. rpm) Sound pressure level (to Cagi Pneurop PN8NTC2) dB(A) 75 (at 70% load)

Electrical data

Nominal electric motor power kW 75

Voltage (frequency) 380 - 460V (50,60Hz) Max. total current consumption at 380V/400V/415V/460V A 170 / 150 / 147 / 140

Starting current Max. full-load current Motor protection type IP-54 Switched reluctance motor Nominal speed min./max. rpm 1200 to 3550

Nominal fan motor power kW 2 x 2.25 (IP-54) Recommended cable cross-section mm2 3x 95 PE 50

Recommended fuse size A 200

Cooling

Cooling air flow through ventilator m3/min 280

Discharged heat quantity % max. 95% of the total power consumption

Connection mass cooling air inlet mm 1120 x 1037

Connection mass cooling air outlet mm 2x (895 x 895) Cooling air outlet temperature above ambient temp. °C 15

Max. allowable pressure drop in duct at ambient 35°C / 45°C Pa 80 / 0

Weights, dimensions and fill amounts

Compressor water filling l 91

ca. drinking water consumption in 24h ( for a water change in 24h at 3.5bar water mains pressure) l 38

Drinking water mains pressure bar 2.5 ... 6.0

Residual water content in compressed air g/m3 0.1..0.2

Compressed air connection R 2" Weight kg 2000

Dimensions L x W x H mm 2158 x 1412 x 1971

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51

10.1.4 Technical data water-cooled EnviroAire VS 75 Maximum operating pressure bar g 10.0 Minimum operating pressure bar g 5.0 Ambient temperature °C 2 to 45 Outlet temperature above ambient temp. °C 17 (at max. rpm) Sound pressure level (to Cagi Pneurop PN8NTC2) dB(A) 75 (at 70% load)

Electrical data

Nominal electric motor power kW 75

Voltage (frequency) 380 - 460V (50,60Hz) Max. total current consumption at 380V/400V/440V/460V A 170 / 150 / 147 / 140

Starting current Max. full-load current Motor protection type IP-54 Switched reluctance motor Nominal speed min./max. rpm 1200 to 3550

Nominal fan motor power kW 2 x 2.25 (IP-54) Recommended cable cross-section mm2 3x 95 PE 50

Recommended fuse size A 200

Cooling

Cooling air flow through ventilator m3/min 115

Cooling water quantity l/min 120

Discharged heat quantity % max. 10% of terminal power Cooling water inlet temperature °C 5 / 35

Cooling water outlet temperature °C 15 / 45

Cooling water pressure bar (g) 2 - 5

Pressure loss, cooling-water side bar 1,5

Cooling water connection R 1 1/4" / R 1 1/4" Weights, dimensions and fill amounts

Compressor water filling l 91

ca. drinking water consumption in 24h ( for a water change in 24h at 3.5bar water mains pressure) l 38

Drinking water mains pressure bar 2.5 ... 6.0

Residual water content in compressed air g/m3 0.1 … 0.2

Compressed air connection R 2" Weight kg 1900

Dimensions L x W x H mm 2158 x 1412 x 1971

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10. Annex

52

10.1.5 Technical data water-cooled EnviroAire VS 110 Maximum operating pressure bar g 10.0 Minimum operating pressure bar g 5.0 Ambient temperature °C 2 to 45 Outlet temperature above ambient temp. °C 15 (at max. rpm) Sound pressure level (to Cagi Pneurop PN8NTC2) dB(A) 75 (at 70% load)

Electrical data

Nominal electric motor power kW 128

Voltage (frequency) 380 - 460V (50,60Hz) Max. total current consumption at 380V/400V/440V/460V A 226 / 218 / 202 / 191

Starting current Max. full-load current Motor protection type IP-54 Switched reluctance motor Nominal speed min./max. rpm 1200 to 3700

Nominal fan motor power kW 1 x 0.37 (IP-54) Recommended cable cross-section mm2 3 x 120 PE 70 Recommended fuse size A 250

Cooling

Cooling air flow through ventilator m3/min 115

Cooling water quantity l/min 170

Discharged heat quantity % max. 10% of terminal power Cooling water inlet temperature °C 5 / 35

Cooling water outlet temperature °C 15 / 45

Cooling water pressure bar (g) 2 - 5

Pressure loss, cooling water side bar 2.3

Cooling water connection R 1 1/4" / R 1 1/4" Weights, dimensions and fill amounts

Compressor water filling l 91

ca. drinking water consumption in 24h ( for a water change in 24h at 3.5bar water mains pressure) l 38

Drinking water mains pressure bar 2.5 ... 6.0

Residual water content in compressed air g/m3 0.1 … 0.3

Compressed air connection R 3" Weight kg 2100

Dimensions L x W x H mm 2158 x 1412 x 1971

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10. Annex

53

10.2 Layout plan

10.2.1 Layout plan EnviroAire VS 50-75

Fig. 27 a (all dimensions in mm)

drain reclaimer

water filling reclaimer + RO-Unit

drain RO-Unit

drain water filling air vacuum generator (only EnviroAire VS 75)

electrical connection

min

. 100

0,

min

. 600

to re

mov

e do

ors

cooling air outlet

cooling air inlet

min

. 100

0,

min

. 600

to re

mov

e do

ors

view without front doors

fork lift slot

lift truck slots

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10. Annex

54

Fig. 27 b (all dimensions in Inch)

drain pressure reservoir

water filling pressure reservoir

+ RO-Unit

drain RO-Unit

drain water filling air vacuum generator (only EnviroAire VS 75)

Electrical connection

min

. 39,

37,

min

. 23,

62 to

rem

ove

door

s

cooling air outlet

cooling air inlet

min

. 39,

37,

min

. 23,

62 to

rem

ove

door

s

view without front doors

fork lift slot

lift truck slots

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10. Annex

55

Fig. 27 c all dimensions in mm [Inch]

cooling water inlet cooling water outlet

cooling air inlet

cooling air outlet Water-cooled version

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10. Annex

56

10.2.2 Layout plan water-cooled EnviroAire VS 110

Fig. 28 all dimensions in mm / Inch

R3/8“ - 3/8“NPT Water filling

pressure reservoir + Supply for RO unit

R3/8“ - 3/8“NPT Drain

pressure reservoir

R1/4“ - 1/4“NPT Control-air filter unit outlet

R1/4“ - 1/4“NPT drain RO-Unit

R1 1/4“ - 1 1/4“NPT cooling water outlet

R1 1/4“ - 1 1/4“NPT cooling water inlet

min

. 100

0 / 3

9,37

0,

min

. 600

/ 23

,622

to re

mov

e do

ors

cooling air outlet

cooling air inlet (compressor)

cooling air inlet (control cabinet)

min

. 100

0 / 3

9,37

0,

min

. 600

/ 23

,622

to re

mov

e do

ors

view without front doors

Page 59: GD air compressors
Page 60: GD air compressors

Gardner Denver Compressor Division, 1800 Gardner Expressway, Quincy, Illinois 62305 Telephone: (800) 682-9868 Fax: (217) 224-7814 Gardner Denver Deutschland GmbH Argenthaler Str. 11 55469 Simmern Deutschland Tel. ++49 (0)6761 832-0 Fax ++49 (0)6761 832-409