O 2. Installation and Operating Instructions. Vacuum Pumps R 5, RA 0155 A Oxygen. with Operating Fluid YLC 250 B

Transcription

1 Installation and Operating Instructions O 2 Vacuum Pumps R 5, RA 0155 A Oxygen with Operating Fluid YLC 250 B Ateliers Busch S.A. Zone industrielle 2906 Chevenez Switzerland / / Original instructions / Modifications reserved

2 Table of Contents Introduction Product description Use Principle of operation Operating fluid circulation Cooling Operational Options/ Use of Optionally Available Equipment.. 4 On/ Off switch Safety Intended use Safety notes Emission of Operating Fluid Mist Noise Emission Transport Transport in Packaging Transport without Packaging Storage Short-term Storage Conservation Installation and Commissioning Installation prerequisites Mounting Position and space Suction Connection Discharge connection Electrical connection/ Controls Installation Mounting Connecting electrically Connection diagram three-phase motor Checking the operating fluid level Recording of Operational Parameters Operation Notes Application Conveying Condensable Vapours Maintenance Maintenance Schedule Monthly: Every 6 Months: Yearly: After 100 operating hours Every Operating hours (see Oil Life ) Every Operating hours, at the latest after 4 Years:. 11 Checking the operating fluid Checking the level Topping up operating fluid Checking the colour of the operating fluid Operating fluid life Operating fluid and oil filter change Draining used operating fluid Flushing the vacuum pump Cleaning of the float valves Replacing the Oil Filter Filling in Fresh Operating fluid Exhaust Filters Check during operation Assessment Change of the exhaust filters Removing the exhaust filters Gas ballast Inlet flange Fan cover - cylinder Motor cover Overhaul Removal from Service Temporary Removal from Service Recommissioning Dismantling and Disposal Troubleshooting Spare parts Wearing parts kit Accessories Operating Fluid Technical data EU Declaration of Conformity Introduction Congratulations on your purchase of the Busch vacuum pump. With watchful observation of the field s requirements, innovation and steady development Busch delivers modern vacuum and pressure solutions worldwide. These operating instructions contain information for product description, security, transport, storage, installation and commissioning maintenance, overhaul, troubleshooting and spare parts of the vacuum pump. For the purpose of these instructions, handling the vacuum pump means the transport, storage, installation, commissioning, influence on operating conditions, maintenance, troubleshooting and overhaul of the vacuum pump. Prior to handling the vacuum system, these operating instructions shall be read and understood. If anything remains to be clarified please contact your Busch representative! Keep these operating instructions and, if applicable, other pertinent operating instructions available on site. Introduction Page 2

3 IN Illustration shows R 5, RA 0155 A; the various elements are similar on all the range R 5 Oxygen IN Suction connection OUT Gas discharge AF Axial fan OF Oil filter AF NP1 Nameplate OS Oil separator DV Discharge valve AF MS Mesh screen IAF Inlet air filter OSG Oil sight glass ODP Oil drain plug OFP Oil fill plug EF Exhaust filter FV Float float VA Rotor vanes RT Rotor OIL Operating fluid LES Lead seal NP2 Nameplate Oxygen IAF OUT OS NP2 OFP LES OSG ODP NP1 IN OS MS EF OIL OUT RT VA DV Product description Use The vacuum pump is intended for the suction of OF OIL FV In case the vacuum pump is equipped with a gas ballast (optional), water vapour within the gas flow can be tolerated within certain limits (see Installation and Commissioning, Operating Notes, Conveying Condensable Vapours ). The conveyance of other vapours shall be agreed upon with Busch. The vacuum pump is intended for use in a potentially non-explosive environment. Max. permissible number of startings per hour: 12. air and other dry, non-aggressive, non-toxic and non-explosive gases with increased oxygen content (volume content greater than 21%) The vacuum pump is thermally suitable for continuous operation. The vacuum pump is ultimate pressure proof. Conveying media with a higher density than air leads to an increased thermal and mechanical load on the vacuum pump and is permissible only after prior consultation with Busch. Max. allowed temperature of the inlet gas: 40 C Product description Page 3

4 Principle of operation Organic matter and oxygen form potentially explosive mixtures. Constant risk of explosion! Only special operating fluids (no mineral or synthetic oils or greases) are allowed for lubrication of the vacuum pump! If there is a suspicion that the operating fluid is contaminated with organic material, is must be changed. If there is a suspicion that the vacuum pump is contaminated with organic material, the vacuum pump must be removed from service and cleaned by specialists (Busch Service). The vacuum pump works on the rotating vane principle. A circular rotor is positioned centrically on the shaft of the vacuum pump. The shaft of the vacuum pump is driven by the drive motor shaft by means of a flexible coupling. The rotor rotates in an also circular, fixed cylinder, the centreline of which is offset from the centreline of the rotor such that the rotor and the inner wall of the cylinder almost touch along a line. Vanes sliding in slots in the rotor, separate the space between the rotor and the cylinder into chambers. At any time gas is sucked in and at almost any time ejected. Therefore the vacuum pump works almost pulsation free. In order to avoid the suction of solids, the vacuum pump is equipped with a mesh screen (MS) in the suction connection (after the inlet filter (IAF). In order to avoid reverse rotation after switching off, the vacuum pump is equipped with a non-return valve. NOTE: This valve shall not be used as a non-return valve or shut-off valve to the vacuum system and is no reliable means to prevent suction of operating fluid into the vacuum system while the vacuum pump is shut down. In case the vacuum pump is equipped with a gas ballast (optional): Through the gas ballast valve a small amount of ambient air is sucked into the pump chamber and compressed together with the process gas. This counteracts the accumulation of condensates from the process gas inside the vacuum pump (see also Operation Notes ). The gas ballast line is equipped with a paper filter. Gas ballast version with ball valve: The gas ballast line can be closed partially or completely by means of a ball valve. In order to improve the operating characteristics the outlet of the pump chamber is equipped with a spring loaded valve. Operating fluid circulation The vacuum pump requires operating fluid to seal the gaps, to lubricate the vanes and to carry away compression heat. The operating fluid reservoir is located on the pressure side of the vacuum pump (i.e. high pressure) at the bottom of the bottom chamber of the oil separator (OS). Forced by the pressure difference between pressure side and suction side operating fluid is being drawn from the oil separator (f) through the oil supply lines and injected on the suction side. Together with the sucked gas the injected operating fluid gets conveyed through the vacuum pump and ejected into the oil mist separator (OS). Operating fluid that separates before the exhaust filter accumulates at the bottom of the bottom chamber of the oil separator (OS). Operating fluid that is separated by the exhaust filter(s), accumulates at the bottom of the upper chamber of the oil separator (OS). separator) to be on a higher pressure level than the outside of the exhaust filters (i.e. the upper chamber of the oil separator). Because of the higher pressure in the bottom chamber it is not possible to let operating fluid that drips off the exhaust filters simply flow down to the bottom chamber. Therefore the operating fluid that accumulates in the upper chamber is sucked by the float valve through the oil return line right to the suction connection. Due to the operating fluids property to attach to water vapour, conveying humid gas mixtures can cause an increased discharge of operating fluid. This circumstance does not constitute a deficiency of the vacuum pump. The operating fluid accumulating in the fine mist separator is sucked back into the vacuum pump through a float valve. Cooling The vacuum pump is cooled by the ambient air around the vacuum pump, including oil mist separator (OS, 75) the air flow from the motor (400) fan wheel the conveyed gas the air flow from the fan wheels (321, 322) on the shaft of the vacuum pump Operational Options/ Use of Optionally Available Equipment To control the oil level in the oil mist separator, an oil level switch is mounted in the oil mist separator (as operational option) To suck condensable vapours, a gas ballast valve (optional) can be installed in the cylinder cover at fan side. To increase the capacity of vapours, another gas ballast valve can be installed in the cylinder cover at the motor side. The valve can open or close the gas ballast during the operation of the pump. In order to ensure the best ultimate pressure during the process, a solenoid valve (optional) can be installed before the gas ballast valve. The solenoid valve can be used as a purge at the end of the process. On/ Off switch The vacuum pump comes without on/ off switch. The control of the vacuum pump is to be provided in the course of installation Safety Intended use DEFINITION: For the purpose of these instructions, handling the vacuum pump means the transport, storage, installation, commissioning, influence on operating conditions, maintenance, troubleshooting and overhaul of the vacuum pump. The vacuum pump is intended for industrial use. It must only be handled by qualified personnel. The allowed media and operational limits according to the Product Description and the Installation Prerequisites of the vacuum pump shall be observed both by the manufacturer of the machinery into which the vacuum pump is to be incorporated and by the operator. The maintenance instructions shall be observed. Prior to handling the vacuum pump these operating instructions shall be read and understood. If anything remains to be clarified please contact your Busch representative! Safety notes The vacuum pump has been designed and manufactured according to the state-of-the-art. Nevertheless, residual risks may remain. These operating instructions inform about potential hazards where appropriate. Safety notes are tagged with one of the keywords DANGER, and as follows: The flow resistance of the exhaust filters causes the inside of the exhaust filters (which is connected to be bottom chamber of the oil Safety Page 4

5 DANGER Disregard of this safety note will always lead to accidents with fatal or serious injuries. Disregard of this safety note may lead to accidents with fatal or serious injuries. Disregard of this safety note may lead to accidents with minor injuries or property damage. Emission of Operating Fluid Mist The non-oem spares market offers exhaust filters that are geometrically compatible with Busch-vacuum pumps, but do not feature the high retention capacity of genuine Busch-exhaust filters. Increased risk of damage to health. In order to keep the emission on the lowest possible level only genuine Busch-exhaust filters shall be used. The operating fluid in the process gas is separated to the greatest possible extent, but not perfectly. The gas conveyed by the vacuum pump contains remainders of operating fluid. Aspiration of gas conveyed by the vacuum pump over extended periods can be harmful. The room into which the gas conveyed by the vacuum pump is discharged must be sufficiently vented. Noise Emission For the sound pressure level in free field according to EN ISO 2151, see Technical Data. The vacuum pump emits noise of high intensity. Risk of damage to hearing. Persons staying in the vicinity of a non noise insulated vacuum pump over extended periods shall wear ear protection. Transport Transport in Packaging Packed on a pallet the vacuum pump is to be transported with a forklift. Transport without Packaging NOTE: The vacuum pump is delivered with operating fluid filled in. When lifting the vacuum pump keep it as horizontal as possible in order to minimise the ingress of operating fluid into the cylinder. In case the vacuum pump is bolted to a pallet or a base plate: Remove the bolting between the vacuum pump and the pallet/ base plate Do not walk, work or stand under suspended loads. Please check out the weight of the vacuum pump before lifting it up (see Technical Data ). Use adequate lifting gear for this. NOTE: The position of the eyebolt fits to the centre of gravity of a vacuum pump incl. drive motor (400). If a vacuum pump without drive motor is to be lifted, attach another belt/ rope at a suitable point. Attach lifting gear securely to the eyebolt (391) on the cylinder. Attach lifting gear to a crane hook with safety latch. Lift the vacuum pump with a crane hook. In case the vacuum pump was bolted to a pallet: Remove the stud bolts from the rubber feet. Tilting a vacuum pump that is already filled with operating fluid can cause large quantities of operating fluid to ingress into the cylinder. Starting the vacuum pump with excessive quantities of operating fluid in the cylinder will immediately break the vanes and ruin the vacuum pump. Storage Short-term Storage Make sure that the ball valve of the gas ballast device is closed (option) Make sure that the suction connection/ gas inlet and the gas discharge/ pressure connection are closed (leave the provided plugs in) Store the vacuum pump if possible in original packaging, indoors, dry, dust free and vibration free Conservation In case of adverse ambient conditions (e.g. aggressive atmosphere, frequent temperature changes) conserve the vacuum pump immediately. In case of favourable ambient conditions conserve the vacuum pump if a storage of more than 3 months is scheduled. If the vacuum pump must be stored in unfavourable conditions which would require a treatment with operating fluid, please contact your representative Busch! Atmospheres authorized operating fluid with increased oxygen proportion is to be used for conservation. Version with gas ballast device with ball valve: Make sure that the ball valve of the gas ballast device is closed Make sure that all ports are firmly closed; seal all ports that are not with PTFE-tape, gaskets or o-rings with adhesive tape. NOTE: VCI stands for Volatile Corrosion Inhibitor. VCI-products (film, paper, cardboard, foam) evaporate a substance that condenses in molecular thickness on the packed good and by its electro-chemical Transport Page 5

6 properties effectively suppresses corrosion on metallic surfaces. However, VCI-products may attack the surfaces of plastics and elastomers. Seek advice from your local packaging dealer! Busch uses CORTEC VCI 126 R film for the overseas packaging of large equipment. Wrap the vacuum pump in VCI film Store the vacuum pump if possible in original packing, indoors, dry, dust free and vibration free Repeat the conservation process after 12 months of immobilization Before a new conservation process or re-installation of the vacuum pump, make sure that the gasket, plug or adhesive tape from the discharge connection are removed. Commissioning after conservation Make sure that the gasket, plug or adhesive tape are removed from the ports Commission the vacuum pump as described in the chapter Installation and Commissioning Installation and Commissioning Installation and commissioning must only be carried out by qualified personnel who are informed about the applicable safety regulations and trained in the handling of oxygen. The Accident Prevention Regulation Oxygen UVV No. 62 (VBG 62) or the corresponding national accident prevention regulation must imperatively be complied with. Installation prerequisites In case of non-compliance with the installation prerequisites, particularly in case of insufficient cooling: Risk of damage or destruction of the vacuum pump and adjoining plant components! Risk of injury! The installation prerequisites must be complied with. Make sure that the integration of the vacuum pump is carried out such that the essential safety requirements of the Machine Directive 2006/42/EC are complied with (in the responsibility of the designer of the machinery into which the vacuum pump is to be incorporated; see also the note in the EC-Declaration of Conformity) Mounting Position and space Make sure that the environment of the vacuum pump is not potentially explosive Make sure that the following ambient conditions will be complied with: Ambient temperature: C Ambient pressure: atmospheric Make sure that the environmental conditions comply with the protection class of the drive motor (according to the nameplate) Make sure that the vacuum pump will be placed or mounted horizontally Make sure that the base for placement/ mounting base is even Make sure that the vacuum pump can neither inadvertently nor intentionally be stepped on and cannot be used as a support for heavy objects Make sure that the vacuum pump cannot be hit by falling objects Make sure that in order to warrant a sufficient cooling there will a clearance of minimum 0,5 m between the fan hood and nearby walls Make sure that no temperature sensitive parts (plastics, wood, cardboard, paper, electronics) will touch the surface of the vacuum pump The vacuum pump is not absolutely gas tight. Risk of explosion! The installation site must be aired in such a way so as to prevent unacceptable levels of oxygen. Make sure that the installation space or location is vented such that a sufficient cooling of the vacuum pump is warranted During operation the surface of the vacuum pump may reach temperatures of more than 70 C. Risk of burns! Make sure that the vacuum pump will not be touched inadvertently during operation, provide a guard if appropriate Make sure that the sight glass (OSG, 83) will remain easily accessible If the operating fluid change is meant to be performed on location: Make sure that the drain port (ODP, 95), the oil filter (OF) and the fill port (OFP, 88) will remain easily accessible Make sure that enough space will remain for the removal and the reinsertion of the exhaust filter(s) Make sure that enough space will remain for the removal and the reinsertion of the air filter cartridge (EF) Suction Connection Any contamination of the vacuum pump with foreign material, particularly with organic material leads to imminent risk of explosion. By means of suitable filters it must be made sure that no foreign material, particularly no organic mateiral will find its way into the vacuum pump. Do not put hands into the inlet aperture. Risk of body damage! Intruding foreign objects or liquids can destroy the vacuum pump. Installation and Commissioning Page 6

7 In case the inlet gas can contain dust or other foreign solid particles: Make sure that a suitable filter (5 micron or less) is installed upstream the vacuum pump Make sure that the filter is approved for oxygen applications Make sure that the suction line fits to the suction connection (IN, 260) of the vacuum pump Make sure that the gas will be sucked through a vacuum-tight flexible hose or a pipe In case of using a pipe: Make sure that the pipe will cause no stress on the vacuum pump s connection, if necessary use bellows Make sure that the line size of the suction line over the entire length is at least as large as the suction connection/ gas inlet (IN, 260) of the vacuum pump In case of very long suction lines, it is prudent to use larger line sizes in order to avoid a loss of efficiency. Seek advice from your Busch representative If two or more vacuum pumps work on the same suction line, if the volume of the vacuum system is large enough to suck back operating fluid or if the vacuum shall be maintained after switching off the vacuum pump: Provide a manual or automatic operated valve (= non-return valve) in the suction line (the non-return valve that is installed inside the suction connection is not meant to be used for this purpose!) If the vacuum pump is planned to be used for the suction of gas that contains limited quantities of condensable vapour Provide a shut-off valve, a drip-leg and a drain valve in the suction line, so that condensates can be drained from the suction line Make sure that the suction line does not contain foreign objects, e.g. welding scales Discharge connection Discharge gases must circulate freely. An interruption or blockage of the discharge line or using the discharged gases as a source of compressed air is not authorised. Do not put hands into the outlet aperture. Risk of body damage! The following guidelines for the discharge line do not apply, if the aspirated air is discharged to the environment right at the vacuum pump. The discharged air contains small quantities of vacuum oil. Spending time in air contaminated with vacuum operating fluid is hazardous to health. If air is discharged into rooms where people are staying, sufficient ventilation must be provided for. Make sure that the discharge line fits the gas discharge connection (OUT, 153) of the vacuum pump In case of using a pipe: Make sure that the pipe will cause no stress on the discharge connection, if necessary use bellows Make sure that the line size of the discharge line over the entire length is at least as large as the gas discharge connection (OUT, 153) of the vacuum pump In case of very long discharge lines (> 2 m) it is prudent to use larger line sizes in order to avoid a loss of efficiency and an overload of the vacuum pump. Seek advice from your Busch representative Make sure that the discharge line either slopes away from the vacuum pump or provide a liquid separator or a drip leg with a drain cock, so that no liquids can back up into the vacuum pump Discharge lines made from non-conducting material can build up static charge. Static discharge can cause explosion of potentially existing operating fluid mist. The discharge line must be made of conducting material or precautions must be made against static discharge. Electrical connection/ Controls Make sure that the stipulations acc. to the EMC-Directive 2014/30/EU as well as the EN-standards, electrical and occupational safety directives and the local or national regulations, respectively, are complied with (this is in the responsibility of the designer of the machinery into which the vacuum pump is to be incorporated; see also the note in the EC-Declaration of Conformity). Make sure that the power supply is compatible with the data on the nameplate of the drive motor (400) Make sure that an overload protection according to EN is provided for the drive motor (400) Make sure that the drive of the vacuum pump will not be affected by electric or electromagnetic disturbance from the mains; if necessary seek advice from the Busch service In case of mobile installation: Provide the electrical connection with grommets that serve as strain-relief Installation Mounting Make sure that the Installation Prerequisites are complied with Set down or mount the vacuum pump at its location Starting the vacuum pump with excessive quantities of operating fluid in the cylinder will immediately break the vanes and ruin the vacuum pump. Connecting electrically Risk of electrical shock, risk of damage to equipment. Electrical installation work must only be executed by qualified personnel that knows and observes the following regulations: - IEC 364 or CENELEC HD 384 or DIN VDE 0100, respectively, - IEC-Report 664 or DIN VDE 0110, - BGV A2 (VBG 4) or corresponding national accident prevention regulation. Installation and Commissioning Page 7

8 Star connection, multi-voltage motor (High voltage): The connection diagrams given below are typical. Specific orders or for certain markets may require deviating connection diagrams. Risk of damage to the drive motor! Check the inside of the terminal box for drive motor connection instructions/ diagrams. Electrically connect the drive motor (400) Connect the protective earth conductor Connection diagram three-phase motor Delta connection (Low voltage): Operation in the wrong direction of rotation can destroy the vacuum pump within a short time. Risk of explosion to the drive motor! Prior to starting-up, make sure that the vacuum pump is connected up correctly. Star connection (High voltage): Determine the intended direction of rotation with the arrow on the fan cover of the motor Bump the drive motor Watch the fan wheel of the drive motor (400) and determine the direction of rotation just before the fan wheel stops If the rotation of the fan wheel must be changed: Switch any two of the drive motor wires in the terminal box Checking the operating fluid level The operating fluid is inert and should not contribute to the generation of potentially explosive gas mixtures. Star-star connection, multi-voltage motor (Low voltage): Any contamination with organic matter leads to an imminent risk of explosion. In order to prevent wrong material from being filled in, the vacuum pump is equipped with one or more tamper-proof lead seals. Removal or placement of lead seals or work that requires the removal of lead seals must only be carried out by specially authorised and trained personnel. Delta connection, multi-voltage motor (Middle voltage): NOTE: Starting the vacuum pump with cold operating fluid is made easier when the suction line is left open or left uncovered (no rubber plate) when starting the pump. Switch on the vacuum pump In case the suction line is equipped with a shut-off valve or organ: Close the shut-off valve or organ In case the suction line is not equipped with a shut-off valve or organ: Cover the suction connection (IN) with a rubber plate Let the vacuum pump run for a few minutes Shut down the vacuum pump and wait a few minutes Make sure that the level is between the MIN and the MAX-markings of the sight glass (OSG, 83) Installation and Commissioning Page 8

9 The vacuum pump must only be operated with the operating fluid, exhaust filters and oil filters that have been approved by the German Federal Institute for Materials Research and Testing (Bundesanstalt für Materialforschung und -prüfung (BAM)) and released for service with this vacuum pump. Use of other operating fluids, exhaust filters or oil filters cancels the vacuum pump s approval for service. In case the level has fallen below the MIN-marking of the sight glass: Top-up operating fluid In case the suction line is equipped with a shut-off valve or organ: Open the shut-off valve or organ In case the suction line is not equipped with a shut-off valve or organ: Remove the suction connection with a rubber plate Make sure that the lead seals (LES) are applied Recording of Operational Parameters As soon as the vacuum pump is operated under normal operating conditions: Measure the drive motor current and record it as reference for future maintenance and troubleshooting work Version with exhaust filter pressure gauge Read the scale of the exhaust filter pressure gauge and record it as reference for future maintenance and troubleshooting work Operation Notes Application The vacuum pump is designed for operation under the conditions described below. In case of disrespect of the above, risk of damage or destruction of the vacuum pump and its components! Risk of Injury! The vacuum pump must only be operated under the conditions described below. Operating a faulty vacuum pump reduces the protection against explosions. Risk of explosion! The vacuum pump must only be operated under ideal conditions described below. The vacuum pump is designed for the suction of air and other dry, non-aggressive, non-toxic and non-explosive gases with increased oxygen content (volume content greater than 21 percent) Conveying media with a higher density than air leads to an increased thermal and mechanical load on the vacuum pump and is permissible only after prior consultation with Busch Max. allowed temperature of the inlet gas: 40 C In case the vacuum pump is equipped with a gas ballast (optional) water vapour within the gas flow can be tolerated within certain limits (see Installation and Commissioning, Operating Notes, Conveying Condensable Vapours ). The conveyance of other vapours shall be agreed upon with Busch. The vacuum pump is made for the intended use in potentially non-explosive areas. Max. permissible number of startings per hour: 12. The vacuum pump is thermally suitable for continuous operation. The vacuum pump is ultimate pressure proof. Organic matter and oxygen form potentially explosive mixtures. Constant risk of explosion! Only special operating fluids, no mineral or synthetic oils or greases are allowed for lubrication of the vacuum pump! If there is a suspicion that the operating fluid is contaminated with organic material, is must be changed. If there is a suspicion that the vacuum pump is contaminated with organic material, the vacuum pump must be removed from service and cleaned by specialists (Busch Service). Only special operating fluids are allowed for the lubrication of the vacuum pump, no mineral or synthetic oils must be used! In order to prevent wrong material from being filled in, the vacuum pump is equipped with one or more lead seals. Lead seals must only be removed and applied by specially authorised and trained personnel. During operation the surface of the vacuum pump may reach temperatures of more than 70 C. Risk of burns! The vacuum pumps shall be protected against contact during operation, it shall cool down prior to a required contact or heat protection gloves shall be worn. The discharged air contains small quantities of vacuum oil. Spending time in air contaminated with vacuum operating fluid is hazardous to health. If air is discharged into rooms where people are staying, sufficient ventilation must be provided for. The noise level of the vacuum pump is quite high. Risk of ear damage. People spending a longer period of time in the vicinity of a non-insulated vacuum pump must wear ear protection. Make sure that all provided covers, guards, hoods etc. are mounted Make sure that protective devices will not be disabled. Make sure that cooling air inlets and outlets are not covered or obstructed and that the cooling air flow is not affected adversely in any other way Installation and Commissioning Page 9

10 Make sure that the Installation Prerequisites (see Installation Prerequisites and Commissioning are complied with and will remain complied with, particularly that a sufficient cooling will be ensured. Conveying Condensable Vapours NOTE: Due to the operating fluids property to attach to water vapour, conveying humid gas mixtures can cause an increased discharge of operating fluid. This circumstance does not constitute a deficiency of the vacuum pump. The operating fluid accumulating in the fine mist separator is sucked back into the vacuum pump through a float valve. Residual condensates dilute the operating fluid, deteriorate its lubricating properties and can cause a jam of the rotor. Apply a suitable operating method to make sure that no condensates remain in the vacuum pump. In order to use the vacuum pump for the conveyance of condensable vapours, the vacuum pump must be equipped with shut-off valve in the suction line and with a gas ballast valve. The quantity of condensable vapours are indicated in the table Technical Data. Version with gas ballast device with ball valve: Make sure that the ballast valve is open and will remain open during operation Close the shut-off valve in the suction line Operate the vacuum pump with the shut-off valve in the suction line closed for approx. half an hour, so that the operating temperature will rise to approx. 75 C At process start: Open the shut-off valve in the suction line At process end: Close the shut-off valve in the suction line Operate the vacuum pump for another approx. half an hour Maintenance The approval of the vacuum pump for the conveyance of gases with increased oxygen content remains valid only if the maintenance is conducted regularly according to the maintenance schedule below and genuine spare parts and consumables, approved for oxygen applications by Busch, are used exclusively. Maintenance work must only be executed by qualified personnel that is trained in the handling of oxygen, informed about the relevant safety regulations and instructed in the handling of oxygen vacuum pumps by Busch. The Accident Prevention Regulation for Oxygen UVV No. 62 (VBG 62) or the corresponding national accident prevention regulation must be complied with unconditionally. The operating fluid is absolutely inert and does not contribute to the generation of potentially explosive gas mixtures. Any contamination with organic matter leads to an imminent risk of explosion! In order to protect the vacuum pump against inadvertent filling with improper fluids, one or more ports are equipped with leadseals. Removal or placement of lead seals or work that require the removal of lead seals must only carried out by specially authorised and trained personnel. In case the vacuum pump conveyed gas that was contaminated with foreign materials which are dangerous to health, harmful material can reside in filters. Danger to health during inspection, cleaning or replacement of filters. Danger to the environment. Personal protective equipment must be worn during the handling of contaminated filters. Contaminated filters are special waste and must be disposed of separately in compliance with applicable regulations During operation the surface of the vacuum pump may reach temperatures of more than 70 C. Risk of burns! Prior to action that requires touching of the vacuum pump, let the vacuum pump cool down, however, if the operating fluid is to be drained, for no more than 20 minutes (the operating fluid shall still be warm when being drained) Prior to disconnecting connections make sure that the connected pipes/ lines are vented to atmospheric pressure Maintenance Schedule NOTE: The maintenance intervals depend very much on the individual operating conditions. The intervals given below shall be considered as starting values which should be shortened or extended as appropriate. Particularly heavy duty operation, such like high dust loads in the environment or in the process gas, other contaminations or ingress of process material, can make it necessary to shorten the maintenance intervals significantly. Monthly: Make sure that the vacuum pump is shut down and locked against inadvertent start up Check the level and the colour of the oil (see Checking the Oil ) Check the vacuum pump for oil leaks - in case of leaks have the vacuum pump repaired (Busch service) Check the function of the exhaust filter (EF,120) (see Exhaust Filters ) Check the function and the property of the oil return valve In case an inlet air filter is installed: Check the inlet air filter, if necessary clean (with compressed air) or replace In case of operation in a dusty environment: Maintenance Page 10

11 Make sure that the housing is free from dust and dirt, clean if necessary (see Every 6 Months: ) Every 6 Months: Make sure that the vacuum pump is shut down and locked against inadvertent start up Make sure that the housing is free from dust and dirt, clean if necessary Clean the fan cowlings, fan wheels, ventilation protection screen and cooling fins Yearly: Make sure that the vacuum pump is shut down and locked against inadvertent start up Replace the exhaust filter (EF, 120) (see Exhaust filters ) In case an inlet filter is installed: Clean (with compressed air) or replace the inlet air filter cartridge Check the inlet screen (MS, 261), clean if necessary After 100 operating hours Make a first oil changing (see Change the oil ) Every Operating hours (see Oil Life ) Change the oil (see Oil Change ) Check the elasticity of the discharge valve (DV, 159). If it is no longer sufficiently elastic, replace it (see Discharge valve ) Every Operating hours, at the latest after 4 Years: Have a major overhaul on the vacuum pump (Busch service) Checking the operating fluid Checking the level Make sure that the vacuum pump is shut down and the operating fluid has collected at the bottom of the oil separator (OS, 75) Read the level on the sight glass (OSG, 83) In case the level has dropped underneath the MIN-marking: Top up operating fluid (see Topping up operating fluid ) In case the level exceeds the MAX-marking: Excessive dilution with condensates - change the operating fluid and check the process If appropriate retrofit a gas ballast (Busch Service) (see Conveying Condensable Vapours ) In case the level exceeds the MAX-marking despite proper use of the gas ballast : Version with gas ballast: Replace the filter of the gas ballast Topping up operating fluid NOTE: Under normal conditions there should be no need to top up operating fluid. A significant level drop indicates a malfunction (see Troubleshooting ). Due to the operating fluids property to attach to water vapour, conveying humid gas mixtures can cause an increased discharge of operating fluid. This circumstance does not constitute a deficiency of the vacuum pump. If the loss of operating fluid caused by the humidity is too high, either take measures to dehumidify the aspirated gas up-stream or install a fine mist separator downstream. NOTE: During operation the exhaust filters get saturated with operating fluid. It is therefore normal that the operating fluid level will drop slightly after replacement of the exhaust filters. Filling operating fluid through the suction connection (IN) will result in breakage of the vanes (VA, 22) and destruction of the vacuum pump. Operating fluid may be filled through the filling port (OFP, 88) only. During operation the oil separator is filled with hot, pressurised operating fluid mist. Risk of injury from hot operating fluid mist with open filling port (OFP, 88). Risk of injury if a loosely inserted filling plug is ejected. Remove the filling plug only if the vacuum pump is stopped. The vacuum pump must only be operated with the filling plug firmly inserted. Make sure that the vacuum pump is shut down and locked against inadvertent start up Remove the filling plug (OFP, 88) The vacuum pump must only be operated with the operating fluid that has been approved by the German Federal Institute for Materials Research and Testing (Bundesanstalt für Materialforschung und -prüfung (BAM)) and released for service with this vacuum pump. Use of other operating fluids voids the vacuum pump s approval for service. Top up operating fluid until acc. to the table "Operating fluid" until the level reaches the middle of the sight glass (OSG, 83) Make sure that the seal ring (89) is inserted into the filling plug (k, 88) and undamaged, replace if necessary Firmly reinsert the filling plug (OFP, 88) with its sealing seat Reapply the lead seals (LES) Checking the colour of the operating fluid NOTE: The operating fluid should be clear and transparent. During operation and right after switching off the operating fluid may be lightly tarnished from gas bubbles. The operating fluid is thermally stable up to approx. 280 C and inert against almost every substance. Therefore discolourations or as persistent tarnish always indicate a contamination with foreign material. Organic material in the operating fluid together with oxygen can form potentially explosive mixtures. If it cannot be ruled out that the tarnish is caused by organic material, the vacuum pump must be removed from service and the operating fluid must be changed by authorised and trained personnel. Maintenance Page 11

12 Dark colored operating fluid may indicate a hazardous pump condition which could cause personal injury. If dark operating fluid similar to the example shown is observed, you have to contact the Busch Customer Service without delay. In case of the operating fluid would appear to be contaminated with some water (the second coat above the operating fluid) or with other condensates, even with a correct use of the gas ballast: Version with gas ballast: Replace the filter Operating fluid life The operating fluid is thermally stable up to approx. 280 C and inert against almost every substance. Therefore the operating fluid life is only limited by the contamination with foreign material. Operating fluid and oil filter change The vacuum pump must only be operated with the operating fluid, exhaust filters and oil filters that has been approved by the German Federal Institute for Materials Research and Testing (Bundesanstalt für Materialforschung und -prüfung (BAM)) and released for service with this vacuum pump. Use of other operating fluids, exhaust filters or oil filters cancels the vacuum pump s approval for service. DANGER In case the vacuum pump conveyed gas that was contaminated with harmful foreign material the operating fluid and the oil filter will be contaminated with harmful material. Danger to health during the changing of contaminated operating fluid and oil filters. Danger to the environment. Personal protective equipment must be worn during the changing of contaminated operating fluid and oil filters. Contaminated operating fluid and oil filters are special waste and must be disposed of separately in compliance with applicable regulations. Draining used operating fluid NOTE: After switching off the vacuum pump at normal operating temperature wait no more than 20 minutes before the operating fluid is drained. Make sure that the vacuum pump is shut down and locked against inadvertent start up Make sure that the vacuum pump is vented to atmospheric pressure Put a drain tray underneath the drain port (ODP, 95) Remove the drain plug (ODP, 95) Drain the operating fluid When the operating fluid stream dwindles: Close the drain plug (ODP, 95) Switch the vacuum pump on for a few seconds Make sure that the vacuum pump is shut down and locked against inadvertent start up Remove the drain plug again and drain away the rest Make sure that the sealing seat on the drain plug is undamaged, if necessary replace the drain plug Firmly reinsert the drain plug Dispose of the used operating fluid in compliance with applicable regulations Flushing the vacuum pump Degraded oil can choke pipes and coolers. Risk of damage to the vacuum pump due to insufficient lubrication. Risk of explosion due to overheating. If there is a suspicion that deposits have gathered inside the vacuum pump, the vacuum pump shall be flushed. Make sure that all the used oil is drained Make sure that the used oil filter (OF, 100) is still in place Create respectively 3,5 litres of flushing agent for the version R A from 50 percent oil and 50 percent paraffin or diesel fuel/ fuel oil Make sure that the oil drain plug (ODP, 95) is reinserted correctly Remove the oil fill plug (OFP, 88) Fill in the flushing agent Firmly reinsert the oil fill plug (OFP,88) Close the suction line Run the vacuum pump for at least half an hour Drain the flushing agent and dispose of it in compliance with applicable regulations NOTE: Due to the use of paraffin and even more in case of using Diesel fuel/ fuel oil, unpleasant odour can occur after recommissioning. If this is a problem, Diesel fuel/ fuel oil should be avoided and the vacuum pump be run at idle in a suitable place until the unpleasant odour vanishes. Cleaning of the float valves Unscrew the fixing screws (142) of exhaust cover plate, take off the washers (143) and remove the exhaust cover plate (140) Check the seal (141) and replace if necessary Unscrew the fixing screws (196) and remove the float (194) Check the o-ring (197) and replace if necessary Check float for cleanliness and good operation. Blast clean with compressed air if necessary For reassembly, please refit float to its support (195) whilst taking care to fit it the correct way round Replacing the Oil Filter Make sure that the operating fluid is drained Remove the oil filter (OF) Apply a drop of fresh operating fluid on the seal ring of the new oil filter (OF) Maintenance Page 12

13 Mount the new oil filter (OF) and tighten it by hand Dispose of the used oil filter in compliance with applicable regulations Filling in Fresh Operating fluid The use of chemically contaminated or polluted operating fluid can lead to hazardous pump conditions which could cause personal injury. The vacuum pump must only be operated with the operating fluid, exhaust filters and oil filters that has been approved by the German Federal Institute for Materials Research and Testing (Bundesanstalt für Materialforschung und -prüfung (BAM)) and released for service with this vacuum pump. Use of other operating fluids, exhaust filters or oil filters cancels the vacuum pump s approval for service. Keep operating fluid acc. to the table Technical data ready NOTE: The amount given in these operating instructions is a guide. The sight glass (OSG, 83) indicates the actual amount to be filled in. Make sure that the drain plug (ODP, 95) is firmly inserted Filling operating fluid through the suction connection (IN, 260) will result in breakage of the vanes and destruction of the vacuum pump. Operating fluid may be filled through the fill port only (OFP, 88). Remove the fill plug (OFP, 88) Fill in operating fluid Make sure that the level is between the MIN and the MAX-markings of the sight glass (OSG, 83) Make sure that the seal ring is inserted into the fill plug (OFP, 88) and undamaged, replace if necessary Firmly reinsert the fill plug (OFP, 88) together with the seal ring Reapply the lead seals (LES) Exhaust Filters Check during operation Busch recommends the use of a filter pressure gauge (available as accessory, see Accessories ). Without filter pressure gauge the filter resistance shall be assessed on the basis of the drive motor current drawn. Make sure that the vacuum pump is running Version with filter pressure gauge: Check that the indication of the filter pressure gauge is in the usual range (< 0,6 bar) Version without filter pressure gauge: Check that the drive motor current drawn is in the usual range (see nameplate) Check that the discharge air is free from operating fluid Assessment If the indication of the filter pressure gauge is in the red field, (> 0,6 bar) or the drive motor draws too much current and/or the pump flow rate has dropped, then the exhaust filters are clogged and must be replaced. NOTE: Exhaust filters cannot be cleaned successfully. Clogged exhaust filters must be replaced with new ones. If the filter pressure gauge indicates a lower pressure than usual, or the drive motor draws less current than usual, the exhaust filters can be clogged and must be replaced. If the discharge air contains operating fluid, the exhaust filters can be clogged or broken through and, if applicable, must be replaced. Change of the exhaust filters DANGER In case the vacuum pump conveyed gas that was contaminated with foreign materials which are dangerous to health, harmful material can reside in filters. Danger to health during inspection, cleaning or replacement of filters. Danger to the environment. Personal protective equipment must be worn during the handling of contaminated filters. Contaminated filters are special waste and must be disposed of separately in compliance with applicable regulations. The filter springs can fly out of the exhaust port during removal or insertion. Risk of eye injury. Eye protection goggles must be worn while handling filter springs. Removing the exhaust filters Make sure that the vacuum pump is shut down and locked against inadvertent start up Prior to disconnecting pipes/ lines make sure that the connected pipes/ lines are vented to atmospheric pressure Remove the discharge cover (142) from the oil separator Remove the seal for the separator cover (141), if necessary Release the spring elements (125) by unscrewing the screws (126) and remove them Remove the exhaust filters (EF, 120) and the o-rings In the case of a R A version: The exhaust filters are two Maintenance Page 13

14 Inserting the Exhaust Filters The non-oem spares market offers exhaust filters that are geometrically compatible with Busch-vacuum pumps, but do not feature the high retention capacity of genuine Busch-exhaust filters and deteriorate the service life and the efficiency of the vacuum pump due to their increased back pressure. Increased risk of damage to health. Adverse effect on efficiency and service life. In order to keep the emission on the lowest possible level and to preserve efficiency and service life only genuine Busch-exhaust filters shall be used. Insert the new exhaust filters with the new o-rings into the oil separator (75). Be sure to fit the exhaust filters as indicated by the arrow at exhaust filters Mount spring elements (125) and apply a tension to the spring elements by means of the screw of tension (126) Check the cover seal (141) and replace it if necessary Mount the discharge cover NOTE: During operation the exhaust filters get saturated with operating fluid. It is therefore normal that the operating fluid level will drop slightly after replacement of the exhaust filters. Gas ballast Check the gas ballast inlet regularly. If the gas ballast does not work correctly, disassemble it, clean it and blow it with compressed air. Inlet flange Check the inlet flange regularly. The maintenance interval of the inlet flange depends on the application. To clean the mesh screen (MS, 261) at the inlet: Remove the fastening screws (265) of the inlet flange Remove the flange Clean the mesh screen (MS, 261) with compressed air Check the different seals and replace them if necessary Refit the mesh screen and the inlet flange Fan cover - cylinder Check the fan cover - cylinder regularly. A bad maintenance of the fan cover will affect the vacuum pump cooling and may lead to overheating of the vacuum pump. Motor cover Check the motor cover regularly. A bad maintenance of the motor cover will affect the vacuum pump cooling and may lead to overheating of the vacuum pump. Overhaul In order to achieve best efficiency and a long life the vacuum pump was assembled and adjusted with precisely defined tolerances. This adjustment will be lost during dismantling of the vacuum pump. Improper work on the vacuum pump will put the operating safety at risk. Risk of explosion! Approval for operation will be cancelled! Any dismantling of the vacuum pump that is beyond of what is described in this manual must be done by specially trained Busch service personnel only. DANGER In case the vacuum pump conveyed gas that was contaminated with foreign materials which are dangerous to health, harmful material can reside in operating fluid and condensates. Harmful material can reside in pores, gaps and internal spaces of the vacuum pump. Danger to health during dismantling of the vacuum pump. Danger to the environment. Prior to shipping the vacuum pump shall be decontaminated as good as possible and the contamination status shall be stated in a Declaration of Contamination (form downloadable from Busch service will only accept vacuum pumps that come with a completely filled in and legally binding signed Declaration of Contamination (form downloadable from Removal from Service Temporary Removal from Service Prior to disconnecting pipes/ lines make sure that all pipes/ lines are vented to atmospheric pressure Recommissioning Vanes (VA, 22) can stick after a long period shutdown period. Risk of vane breakage if the vacuum pump is started with the drive motor. After longer shutdown period the vacuum pump must be turned by hand. After longer periods of shutdown period: Make sure that the vacuum pump is shut down and locked against inadvertent start up Remove the cover around the fan of the drive motor Slowly rotate the fan wheel by hand several revolutions in the intended direction of rotation (see stuck on or cast arrow) Mount the cover around the fan wheel of the drive motor If deposits could have gathered in the vacuum pump: Flush the vacuum pump (see Maintenance ) Observe the chapter Installation and Commissioning It is therefore strictly recommended that any dismantling of the vacuum pump that is beyond of what is described in this manual shall be done by the Busch service. Overhaul Page 14

15 Dismantling and Disposal DANGER In case the vacuum pump conveyed gas that was contaminated with harmful foreign material the operating fluid and the exhaust filter(s) will be contaminated with harmful material. Harmful material can reside in pores, gaps and internal spaces of the vacuum pump. Danger to health during dismantling of the vacuum pump. Danger to the environment. During dismantling of the vacuum pump personal protective equipment must be worn. The vacuum pump must be decontaminated prior to disposal. Prior to shipping the vacuum pump shall be decontaminated as good as possible and the contamination status shall be stated in a Declaration of Contamination (form downloadable from Operating fluid and exhaust filters must be disposed of separately in compliance with applicable regulations. Used operating fluid, used exhaust filters and used oil filters are special waste and must be disposed of in compliance with applicable regulations. The filter springs can fly out of the exhaust port during removal or insertion. Risk of eye injury. Eye protection goggles must be worn while handling filter springs. Remove the exhaust filter (see Maintenance, Exhaust Filter ) Drain the operating fluid Remove the oil filter (OF) Make sure that materials and components to be treated as special waste have been separated from the vacuum pump Make sure that the vacuum pump is not contaminated with harmful foreign material According to the best knowledge at the time of printing of this manual the materials used for the manufacture of the vacuum pump involve no risk. Dispose of the used operating fluid in compliance with applicable regulations Dispose of special waste in compliance with applicable regulations Dispose of the vacuum pump as scrap metal Removal from Service Page 15

16 Troubleshooting Risk of electrical shock, risk of damage to equipment. Electrical installation work must only be executed by qualified personnel that knows and observes the following regulations: - IEC 364 or CENELEC HD 384 or DIN VDE 0100, respectively, - IEC-Report 664 or DIN VDE 0110, - BGV A2 (VBG 4) or equivalent national accident prevention regulation. During operation the surface of the vacuum pump may reach temperatures of more than 70 C. Risk of burns! Let the vacuum pump cool down prior to a required contact or wear heat protection gloves. Problem Possible Cause Remedy The vacuum pump does not reach the usual pressure The drive motor draws a too high current (compare with initial value after commissioning) Evacuation of the system takes too long The vacuum system or suction line is not leak-tight Contaminated operating fluid (the most common cause) No or not enough operating fluid in the reservoir The exhaust filters are partly clogged The oil filter is partly clogged (the operating fluid flows through the bypass only, the operating fluid does not get filtered any more) In case a mesh screen is installed on the suction connection (IN): The mesh screen on the suction connection (IN) is partly clogged In case an inlet filter is installed on the suction connection (IN): The filter on the suction connection (IN) is partly clogged Partial clogging in the suction, discharge or pressure line Long suction, discharge or pressure line with too small diameter The valve disk of the inlet non-return valve is stuck in closed or partially open position The oil tubing is defective or leaking The oil return line is broken A shaft seal is leaking The exhaust valve is not properly seated or stuck in partially open position A vane is blocked in the rotor or otherwise damaged The radial clearance between the rotor (RT) and the cylinder is no longer adequate Check the hose or pipe connections for possible leak Drain the operating fluid (see Maintenance ) Top up operating fluid (see Maintenance ) Replace the exhaust filters (see Maintenance ) Replace the oil filter (see Maintenance ) Clean the mesh screen If cleaning is required too frequently install a filter upstream Clean or replace the inlet filter, respectively Remove the clogging Use larger diameter Disassemble the inlet, clean the mesh screen and the valve as required and reassemble Replace the connections and/ or the tubing (replace with identically dimensioned parts only) (Busch service) Replace the shaft seal ring (Busch service) Disassemble and reassemble the exhaust valve(s) (Busch service) Free the vanes or replace with new ones (Busch service) Readjust the vacuum pump (Busch service) Troubleshooting Page 16

17 Internal parts worn or damaged Repair the vacuum pump (Busch service) The oil return line starts in an area vented to atmospheric pressure. Particularly on small model pumps, a fairly large amount of air is sucked through the oil return line, which may prevent the ultimate pressure from reaching 20 bar abs. In order to exclude this possible cause: squirt operating fluid through the gas discharge connection (OUT). The gas conveyed by the vacuum pump smells displeasing The vacuum pump does not start The vacuum pump is blocked Process components evaporating under vacuum The drive motor is not supplied with the correct voltage or is overloaded The drive motor starter overload protection is too small or trip level is too low One of the fuses has blown The connection cable is too small or too long causing a voltage drop at the vacuum pump The vacuum pump or the drive motor is blocked The drive motor is defective Solid foreign matter has entered the vacuum pump Corrosion in the vacuum pump from remaining condensate The vacuum pump was run in the wrong direction After shutting down the vacuum pump the vacuum system exerted underpressure onto the pump chamber which sucked back excessive operating fluid from the oil separator into the pump chamber When the vacuum pump was restarted too much operating fluid was enclosed between the vanes Operating fluid could not be compressed and thus broke a vane Check the process, if applicable Supply the drive motor with the correct voltage Compare the trip level of the drive motor starter overload protection with the data on the nameplate Correct if necessary In case of high ambient temperature: Set the trip level of the drive motor starter overload protection 5 percent above the nominal drive motor current Check the fuses Use sufficiently dimensioned cable Make sure the drive motor is disconnected from the power supply Remove the fan cover Try to turn the fan by hand If the unit vacuum pump/drive motor is still frozen: Remove the drive motor and check the drive motor and the vacuum pump separately If the vacuum pump is blocked: Repair the vacuum pump (Busch service) Replace the drive motor (Busch service) Repair the vacuum pump (Busch service) Make sure the suction line is equipped with a mesh screen If necessary additionally provide a filter Repair the vacuum pump (Busch service) Check the process Observe the chapter Installation and Commissioning, Operating Notes, Conveying Condensable Vapours Repair the vacuum pump (Busch service) When connecting the vacuum pump make sure the vacuum pump will run in the correct direction (see Installation ) Repair the vacuum pump (Busch service) Make sure the vacuum system will not exert underpressure onto the shut-down vacuum pump, if necessary provide an additional shut-off valve or non-return valve Troubleshooting Page 17

18 The drive motor is running, but the vacuum pump stands still The vacuum pump starts, but labours or runs noisily or rattles The drive motor draws a too high current (compare with initial value after commissioning) Condensate ran into the pump chamber When the vacuum pump was restarted too much condensate was enclosed between the vanes Condensate could not be compressed and thus broke a vane The coupling between the drive motor and the vacuum pump is defective Connection(s) in the drive motor terminal box are defective Not all drive motor coils are properly connected The drive motor operates on two phases only The vacuum pump runs in the wrong direction Standstill over several weeks or months No operating fluid change over extended period of time Foreign objects in the vacuum pump Broken vanes Stuck bearings Repair the vacuum pump (Busch service) Make sure no condensate will enter the vacuum pump, if necessary provide a drip leg and a drain cock Drain condensate regularly Replace the coupling Check the proper connection of the wires against the connection diagram Tighten or replace loose connections Verification and rectification see Installation and Commissioning, correct if necessary Let the vacuum pump run warm with inlet closed Perform operating fluid change incl. flushing (see Maintenance ) Repair the vacuum pump (Busch service) The vacuum pump runs very noisily Defective bearings Repair the vacuum pump (Busch service) The vacuum pump runs very hot (the operating fluid sump temperature shall not exceed 100 C) Worn coupling element Stucked vanes Insufficient air ventilation Ambient temperature too high Temperature of the inlet gas too high The exhaust filter is partially clogged The oil filter is partially clogged (the operating fluid flows through the bypass only, the operating fluid does not get filtered any more) Not enough operating fluid in the reservoir Mains frequency or voltage outside tolerance range In case a mesh screen is installed on the suction connection (IN): The mesh screen on the suction connection (IN) is partially clogged In case an inlet air filter is installed on the suction connection (IN): The filter on the suction connection (IN) is partially clogged Replace the coupling element Repair the vacuum pump (Busch service) Make sure that the cooling of the vacuum pump is not impeded by dust/ dirt Clean the fan cowlings, fan wheels, ventilation screens and cooling fins Install the vacuum pump in a narrow space only if sufficient ventilation is ensured On a vacuum pump with oil-cooler: Clean the intermediate spaces of the finned tube Observe the permitted ambient temperatures Observe the permitted temperatures for the inlet gas Replace the exhaust filters Replace the oil filter (see Maintenance ) Top up operating fluid Provide a more stable power supply Clean the mesh screen If cleaning is required too frequently install a filter upstream Clean or replace the filter Troubleshooting Page 18

19 The vacuum pump fumes at the exhaust side or expels operating fluid droplets through the outlet The operating fluid level drops After settling the operating fluid remains milky A second phase settles on top of the operating fluid Partial clogging in the suction or discharge line Long suction, discharge or pressure line with too small diameter The exhaust filters are not properly seated The o-rings from the exhaust filters are missing or damaged The exhaust filters show cracks The exhaust filters are clogged with foreign matter NOTE: The saturation of the exhaust filters with operating fluid is no fault and does not impair the function of the exhaust filters! Operating fluid dropping down from the exhaust filters is returned to the oil circulation. The float valve is clogged The oil return line is clogged or broken Contamination of the operating fluid with process matter Contamination of the operating fluid with water Remove the clogging Use larger diameter Check the proper position of the exhaust filters (see Maintenance ) Add or replace the o-rings (see Maintenance ) Replace the exhaust filters (see Maintenance ) Replace the exhaust filters (see Maintenance ) Clean the float valve (see Maintenance, Operating fluid change/ Oil Filter, Checking the Float Valve ) Repair the oil tubing (Busch service) Replace a broken oil return line with an identically dimensioned line Fill in new operating fluid Replace the operating fluid Separate the water from the operating fluid Check the process Troubleshooting Page 19

20 Spare parts NOTE: When ordering spare parts or accessories acc. to the table below please always quote the type and the serial no. of the vacuum pump. This will allow Busch service to check if the vacuum pump is compatible with a modified or improved part. The exclusive use of genuine spare parts and consumables is a prerequisite for the proper function of the vacuum pump and for the granting of warranty, guarantee or goodwill. This parts list applies to a typical configuration of the standard vacuum pump. Depending on the specific order deviating parts data may apply. Wearing parts kit Operating Fluid The use of chemically contaminated or polluted operating fluid can lead to hazardous pump conditions which could cause personal injury. Denomination Base Busch YLC 250 B PFPE Specific gravity (20 C [g/cm 3 ] 1,90 Wearing parts kit Set of seals Overhaul kit Service kit Description consisting of all necessary seals consisting of set of seals and all wearing parts consisting of oil filter, exhaust filters and o-rings R A Ambient temperature range [ C] Kinematic viscosity at 20 C [mm 2 /s] 270 Viscosity index (20 C) 113 Specific oil consumption [cm 3 /h] 0,7 Pourpoint [ C] - 35 Accessories Accessories R A Inlet filter upright with paper cartridge Inlet filter horizontal with paper cartridge Replacement paper cartridge Gas ballast Silencer Exhaust filters pressure gauge Vacuum regulating unit, connection G 1 1/ Motor safety switch: Adjustment range 6,0-10,0 A, 400 V, 50 Hz Motor safety switch: Adjustment range 10,0-16,0 A, 400 V, 50 Hz Motor safety switch: Adjustment range 25,0-32,0 A, 230 V, 50 Hz Part no. 0,5 l (~1 kg) packaging Part no. 2,5 l (~5 kg) packaging Note Filling quantity approx. [l] Specials applications Oxygen See Technical data Spare parts Page 20

21 Technical data Technical data R A Nominal displacement 50 (60) Hz m 3 /h 135 (160) Ultimate pressure RA hpa (mbar) 0,1 Nominal motor rating 50 (60) Hz kw 3 (4,2) Nominal motor speed 50 (60) Hz min (1800) Sound level (EN ISO 2151) 50 (60) Hz db(a) 70 (72) Water vapour tolerance max., with gas ballast (DIN 28426) hpa (mbar) 40 Water vapour capacity 50 (60) Hz l/h 2,0 (2,3) Operating temperature 50 (60) Hz C 64 (66) Ambient temperature range C C Ambient pressure Atmospheric pressure Operating fluid capacity l 3,5 Weight approx. kg 110 Technical data Page 21

22

23 EU-Declaration of Conformity This Declaration of Conformity and the CE-mark affixed to the nameplate are valid for the machine within the Busch scope of delivery. This declaration of Conformity is issued under the sole responsibility of the manufacturer. When this machine is integrated into a superordinate machinery the manufacturer of the superordinate machinery (this can be the operating company, too) must conduct the conformity assessment process for the superordinate machine or plant, issue the Declaration of Conformity for it and affix the CE-mark. The manufacturer: Ateliers Busch S.A. Zone Industrielle CH-2906 Chevenez declare that the machine(s) R 5, RA 0155 A Oxygen with a serial number from C to C has (have) been manufactured in accordance with the European Directives: Machinery 2006/42/EC Electromagnetic Compatibility 2014/30/EU RoHS 2011/65/EU, restriction of the use of certain hazardous substances in electrical and electronic equipment and following the standards: Standard EN ISO 12100:2010 EN ISO 13857:2008 EN :2010 EN : A1:2009 Title of the standard Safety of machinery - Basic concepts, general principles of design Safety of machinery - Safety distances to prevent hazard zones being reached by the upper and lower limbs Compressors and vacuum pumps - Safety requirements - Part 1 and 2 EN ISO 2151:2008 Acoustics - Noise test code for compressors and vacuum pumps - Engineering method (grade 2) EN :2006 Safety of machinery - Electrical equipment of machines - Part 1: General requirements EN :2005 Electromagnetic compatibility (EMC) Generic standards. Immunity for industrial environments; Part 1 and 3 EN : A1:2011 Electromagnetic compatibility (EMC) Generic standards. Emission standard for industrial environments EN ISO :2015 (1) Safety of machinery - Safety-related parts of control systems - Part 1: General principles for design and 2 Person authorised to compile the technical file: Gerd Rohweder Busch Dienste GmbH Schauinslandstr. 1 DE Maulburg Chevenez, Christian Hoffmann, General Director (1) In case control systems are integrated.