Users Manual Model 125
Contents
1. Figure 3 3 shows the Model 125 compressor dimensions Model 125 Cryopump Compressor Users Manual 3 6 Model 125 Cryopump Compressor Introduction Figure 3 3 Model 125 Dimensions Larger Print Attached at the End of This Manual 2 O INSTRUMENTS Austin Scientific Co M125 Dimensions tS a AS ustin E pony 5 pa 731 ri 15 71 38 m a 19 00 zsh ERY E A E MA SCC CXI 19 56 Model 125 Cryopump Compressor Users Manual 3 7 Model 125 Cryopump Compressor Introduction 3 3 Ordering Information Table 3 4 contains the ordering information for the Model 125 compressor unit Table 3 4 Model 125 Compressor Unit Ordering Information Compressor Unit Part Number M125 Water cooled Low voltage Standard drive circuit 91 00003 0LW M125 Air cooled Low Voltage Standard drive circuit 91 00003 1LA Customers can also order the optional accessories and replacement parts listed in Table 3 5 Table 3 5 Optional Accessories and Replacement Parts Accessories Replacement Parts Part Number Adsorber for water cooled model 80034 Adsorber for air cooled model 90 10009 000 Helium lines 10ft 10418 10 Helium regulator HR 580 Mai2. LI or SUIT EI i 2 re BAN a P e Lg 21 D m Li si i 9 oz 3 1 M 1 1 I 6 I pou 1 l I bg Loro gt l rs ba T H 9 1 l i I LA i 92m TE Sz I T 4 I I RI I m SV I li In I N l Flo I i z c I Hal x ll I I 3 l D N gt m l el L A 4 m DDWAYIS PINI SZLW OD DIIUSIDS usn Y Model 125 Cryopump Compressor Users Manual 4 4 Model 125 Cryopump Compressor Installation OX F RD Figure 4 2 Model 125 Electrical Chassis Components Inside View LEGEND ITEM DESCRIPTION REF DESIG PIN 1 Capacitor Run C1 30016 2 Capacitor Start C2 30015 3 Capacitor 60HZ C3 30014 4 Fuse 1 Amp not shown F1 50081 5 Relay Start K1 50085 6 Meter Elapsed Time M1 50089 7 Connector 15 Pin Chassis P2 50087 8 Resistor 150 ohm 100 watt R1 20053 9 Resistor 15K ohm 2 watt R2 20056 10 Resistor 680 ohm 1 watt R3 20057 11 Switch Compressor ON OFF SW1 50083 12 Switch Safety Interlock SW2 50155 13 Transformer T1 50082 14 Terminal Block TB1 50125 Model 125 Cryopump Compressor Users Manual 4 5 ustin Scientific an Oxford Instruments company Operations 5 S 5 2 Caution Before Switching On the System After the compressor unit and its load cryopump coldhead etc are installed and connected check the helium gas pressure as indicated by the pressure gauge mounted on the rear panel of the compressor unit Refer to Chapter 3 Section 3
3. Set the pressure of the helium supply cylinder to the value specified in Chapter 3 Table 3 3 Tighten the 1 4 flare connector on the end of the helium flexline to the gas charge vent valve of the compressor 5 Open the pressure regulator valve slightly so that the helium flexline are purged with helium gas for at least 15 seconds 6 Open the helium gas charge vent valve and fill the compressor unit to the desired pressure value 7 Detach the coupling of the helium flexline from the helium charge vent valve 8 Close the helium gas regulator on the supply cylinder 9 Seal the helium gas charge vent valve on the compressor unit by properly securing with a protective cap Adjusting Helium Gas Pressure Refer to Chapter 3 Chapter 3 3 for the required pressure specification of the compressor unit If the pressure falls below that level the helium gas refill procedure described in Section 4 2 4 3 needs to be performed On the other hand if the pressure is too high then the helium gas needs to be released in order to maintain the proper level Electrical Connection Before connecting power to the compressor unit make sure the factory setting of the frequency switch on the front panel matches the frequency of the power supply where the unit is being installed Failure to do so will result in performance degradation of the system Electrical connections are to be made in accordance to the diagram in Figure 4 1 Figure 4 2 shows the Elec
4. esses ener nennen nennen tennis 1 2 3 1 Model 125 Cryopump Compressor Subsystems sssssssssssseeenneee enne 3 2 3 2 Power Requirements for Model 125 Cryopump Compressor sse 3 6 3 3 Model 125 Compressor Specifications sssssssssssessseeeeee enne 3 6 3 4 Model 125 Compressor Unit Ordering Information 3 8 3 5 Optional Accessories and Replacement Parts ssssssssssssseeenneeee enne 3 8 6 1 Troubleshooting PrOCedUresS coooonnoccccnnnncccccnnnnnonccnnnn S enne nennen 6 2 Revision History Date Revision Description August 2006 1 0 1 Conversion to new format Model 125 Cryopump Compressor Users Manual iv ustin Scientific an Oxford Instruments company Preface 1 1 1 1 2 1 3 About Austin Scientific Austin Scientific a wholly owned subsidiary of Oxford Instruments specializes in the manufacture and repair of cryogenic vacuum pumps cryocoolers refrigerators and helium compressors for semiconductor optical coating linear accelerators medical equipment and R amp D applications You can find just what you need from our range of products and support services New Equipment cryopumps compressors cryocoolers and cryopump controllers such as the Model 125 Cryopump Compressor described in this manual Comprehensive range of accessories for the installation of whole systems and a complete range of spare parts to re
5. 2 for the proper static pressure readings for the compressor If the helium pressure needs to be adjusted refer to Chapter 7 Section 7 4 1 for procedures to release helium gas in order to reduce the pressure or to fill the compressor with more helium gas to increase the pressure Do not remove the top cover of the compressor unit Doing so will disable the unit due to the built in safety interlock mechanism Normal Operation Do not turn on the compressor unit without having connected the helium flexlines and the compressor load cryopump coldhead etc Failure to do so may cause damage to the compressor system The load of the compressor can be powered through the power connectors located on the front panel of the compressor To start operation of the compressor and its load do the following 1 Open the coolant supply water cooled compressor model only 2 Switch on the main power source 3 Press the ON button to start the compressor Both the compressor and its load should start simultaneously During operation check the coolant flow rate water cooled compressor and the operating pressure frequently Refer to Chapter 3 Table 3 3 for required coolant flow rate If it is too slow make sure any problems associated with water supply or water outlet are resolved Refer to Chapter 3 Table 3 3 for proper helium pressure level for the compressor unit If the helium pressure is too low switch off the compressor unit It may be ne
6. Model 125 Cryopump Compressor Users Manual 3 5 Model 125 Cryopump Compressor Introduction O z RD i 3 2 Specifications The Model 125 cryopump compressor specifications are listed in Table 3 2 and Table 3 3 Table 3 2 Power Requirements for Model 125 Cryopump Compressor P N Model VAC Hz Phase AMPs 91 00003 0LW Model 125 Water Cooled 208 230 60 50 1 15 91 00003 1LA Model 125 Air Cooled 208 230 60 50 1 15 Table 3 3 Model 125 Compressor Specifications Feature Component Specification Description Length 19 00 inches 183 mm Physical Dimensions Height 16 00 inches 406 mm Width 19 50 inches 495mm Weight 150 Ib 68 kg Static 190 5 psig Helium Pressure Operating 250 10 psig supply Cold head power connector mates with ASC and CTI drive cables Compressor power cord is equipped with a Hubbell No 5G66C plug Helium connections 1 2 inch Male Aeroquip couplings Interface 10 000 Hours per elapsed time meter on the Adsorber Replacement Schedule compressor 0 4 gpm minimum flow rate 80 F maximum inlet water temperature Cooling Water 115 F maximum temperature Recommended chiller capacity 1 ton per unit Water line connector 3 8 Swagelok Air cooled units must maintain a minimum clearance of at least 12 Inches at both the front Air Cooling and rear grills Maximum ambient temperature should not exceed 104 F
7. for easy maintenance No front or rear panels with which to struggle Rack mounting available which is ideal for ion implanters catscanners and sputtering system applications Overview of Model 125 Compressor Design amp Operation Model 125 cryopump compressor is specifically designed to run a single CP 8 or CP 8LP low profile cryopump for 208 230 VAC and 60 50 Hz single phase operation The compressor itself consists of four main components Compressor capsule Heat exchanger Oil mist vapor separator Adsorber The compressor unit and the coldhead are connected by way of helium gas flexlines The compressor unit coldhead and helium lines are fitted with self sealing couplings and are charged with ultra high purity 99 999906 helium gas The heat exchanger removes the heat generated from the process of compressing helium in the capsule The heat generated by the capsule must be removed from the oil and the helium gas To remove heat from the compressor capsule oil is used as lubrication and cooling medium The helium gas as well as oil are then pumped by way of differential pressure out of the capsule through the water cooled or air cooled heat exchanger The cooled oil returns to the capsule to lubricate and cool the capsule Model 125 Cryopump Compressor Users Manual 3 1 Model 125 Cryopump Compressor Introduction OXF RD i 3 1 3 3 1 4 The helium gas purifying occurs after the heat removal and cooling pr
8. gas leakage Chapter 7 Figure 7 2 contains an illustration of the self sealing couplings 4 Remove the top cover 5 Remove the adsorber from the compressor shown in Chapter 7 Figure 7 1 Save all nuts bolts and washers for installing the replacement adsorber 6 The removed adsorber can be returned to Austin Scientific for credit Chapter 1 Section 1 2 provides the contact information Install Replacement Adsorber To install the replacement adsorber 1 Remove the dust caps from the self sealing coupling halves at each end of the replacement adsorber 2 Check the self sealing connector flat rubber gasket to make sure that it is clean and properly positioned 3 Place the adsorber back in the compressor using the nuts bolts and washers set aside during the removal process described in Step 5 of Chapter 7 Section 7 3 1 4 Install the two self sealing coupling halves quickly to minimize minor gas leakage 5 Use the two wrenches supplied with the Installation Kit holding one wrench tight on the coupling half attached to the rear side of the compressor Use the other wrench to tighten the coupling to the helium supply line Model 125 Cryopump Compressor Users Manual 7 2 OXFORD INSTRUMENTS i Model 125 Cryopump Compressor Maintenance 6 Make the final turns by hand and then use the wrenches until the fittings bottom out 7 Replace the cover and the flex lines Make sure that the cover is installed so that i
9. iii O FORD Contents 7 2 Removing the Compressor from Service Removal Transport and Siri 7 1 7 3 Scheduled Preventative Maintenance Activity 7 2 7 3 1 Remove the Compressor Adsorber ssssssssseeee eene 7 2 7 3 2 Install the Replacement Adsorber sssse eene 7 2 7 4 Unscheduled Corrective Maintenance ssesssssssssseeeee eene 7 4 74 1 Adding Helium GaS siii tret ttem ree dnt pm en ab ok tak 7 4 7 4 2 Removing Helium Contamination oooccccccnnnnccnnncccnnncnnoncnnnn acc nana naar cnn enne 7 5 74 5 Cleaning the Equipment iret reed enit bee ea pee etur a padi aksan aie 7 5 76 Returning EquiPMe tico 7 5 Figures 3 1 Flow Diagram for Water Cooled Model 125 Compressor sse 3 4 3 2 Flow Diagram for Air Cooled Model 125 Compressor sssssssseeeeee 3 5 3 3 Model 125 Cryopump Compressor Dimensions oonoccccccccincccnnnnaccnnnnnnnnoncnnnnn cnn nn nn nr nccn narran 3 7 4 1 Electrical Connections Schematics ssssssssssssssssesee eene 4 4 4 2 Model 125 Electrical Chassis Components Inside View 4 5 7 1 Location of Adsorber in Model 125 Compressor sesssssssssseseeeneeennnens 7 3 7 2 Self Sealing Coupling in Disconnected Closed and Partially Closed Positions 7 4 Tables 1 1 Compatible Configurations
10. the Model 125 compressor is the replacement of compressor adsorber after every 10 000 hours of operation as indicated on the compressor elapsed time meter When the compressor is used with 50 Hz power the actual elapsed time will be 1 2 times of that shown on the meter The adsorber is used to keep the oil vapor out of the helium gas in the flow circuit of compressor unit and its load After about 10 000 hours of operation the effectiveness of the adsorber will decrease It will then needs to be replaced Otherwise the oil particles could accumulate on the cold surface of the compressor load reducing the cooling performance of the overall system In severe cases of such oil contamination the load cryopump coldhead etc could cease to function completely To remove and replace the compressor adsorber follow the steps described in Chapter 7 Section 7 3 1 and Chapter 7 Section 7 3 2 Use only Austin Scientific supplied adsorber for replacement Refer to Chapter 3 Section 3 3 for part number Remove the Compressor Adsorber To remove the compressor adsorber 1 Turn off the compressor 2 Use the two wrenches supplied with the Installation Kit to avoid loosening the body of the coupling from ts adapter Hold one wrench tight on the coupling half attached to the rear side of the compressor Use the other wrench to loosen the coupling to the helium supply line 3 Unscrew the two self sealing coupling halves quickly to minimize minor
11. to the compressor For air cooled model provide additional cooling to the surrounding environment Turn the compressor on and off for several times to allow the oil temperature to rise Add helium using the procedure described in Chapter 7 Section 7 4 1 Check for proper cooling of the compressor unit Confirm that power source voltage is correct Model 125 Cryopump Compressor Users Manual 6 2 Model 125 Cryopump Compressor Troubleshooting 6 z i z w TRUMENTS Table 6 1 Troubleshooting Procedures Continued Problem Possible Cause Corrective Action Compressor stops after 6 Mechanical seizure 6 Contact the Austin several minutes of operation Scientific service and remains off cont d department Model 125 Cryopump Compressor Users Manual 6 3 ustin Scientific an Oxford Instruments company Maintenance 7 ful 7 2 Caution Caution Maintenance Personnel Requirements Only trained and qualified personnel should perform the maintenance procedures described in this chapter All other maintenance work must be performed by Austin Scientific personnel in the factory Please contact Austin Scientific to make arrangement for such work See contact information in Section 1 2 Removing the Compressor from Service Removal Transport and Storage It is recommended that the Model 125 compressor be removed from service when carrying out the maintenance duties described
12. Users Manual Model 125 Cryopump Compressor An cti ex FO RD INSTRUMENTS an Oxford Instruments company Date Published October 2006 Part Number 97 00020 000 Rev 1 0 1 Austin Scientific is a wholly owned subsidiary of Oxford Instruments For information about Oxford Instruments visit the Oxford Instruments Web site at http www oxford instruments com How to Contact Austin Scientific Support For contact information and a complete listing of Direct Sales Distributor and Sales Representative contacts visit the Austin Scientific Web site at http www austinscientific com Austin Scientific has made its best effort to ensure that the information contained in this document is accurate and reliable However the information is subject to change without notice and is provided AS IS without warranty of any kind express or implied Before placing orders customers are advised to obtain the latest version of relevant information to verify that information being relied upon is current and complete All products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment including those pertaining to warranty patent infringement and limitation of liability No responsibility is assumed by Austin Scientific for the use of this information including use of this information as the basis for manufacture or sale of any items nor for infringements of patents or other rights of third part
13. cessary to perform a helium topping up maintenance procedure as described in Chapter 7 Section 7 4 1 If pressure drop off happens frequently there may be a substantial leak in the helium circuit of the compressor In this case contact Austin Scientific customer service immediately To shut down the compressor unit press the OFF button on the front panel After that allow coolant to continue to circulate for at least 10 more minutes before shutting off flow Model 125 Cryopump Compressor Users Manual 5 1 ustin Scientific an Oxford Instruments company Troubleshooting 6 6 1 Troubleshooting Activities Table 6 1 describes some problems that users might encounter while operating the Model 125 Cryopump Compressor and provides solutions to those problems If a compressor problem still persists after performing the corrective actions described in this section please contact Austin Scientific Technical Support for further assistance Refer to Chapter 1 Section 1 2 for contact information Model 125 Cryopump Compressor Users Manual 6 1 Model 125 Cryopump Compressor Troubleshooting Table 6 1 Troubleshooting Procedures OXFORD Problem Possible Cause Corrective Action The compressors On Off switch SW1 remains in the On position when switched on but the pump does not run No power is coming from the power source Incorrect or disconnected wiring within the compressor Check service f
14. eturn helium flexline at 50 100 psi to begin the cycle again The helium flow between the Model 125 compressor s components is illustrated in Figure 3 land Figure 3 2 for the water cooled and air cooled version of the Model 125 compressor respectively Model 125 Cryopump Compressor Users Manual 3 3 Model 125 Cryopump Compressor Introduction Figure 3 1 Flow Diagram for Water Cooled Model 125 Compressor HELIUM RE TURN HELIUM SUPPLY ADSORBER SUPPLY PRESSURE SAUGE DIFFERENTIAL PRESSURE RELIEF VALVE 200 PH UNLOADING VALVE NO me a asi m COMPRESSOR 1 RELIEF N OVERLOAD i VALVE PROTECTOR p 350 PS HOT OIL GAS THERMOSTAT m ee QIL MIE COMPRESSOR Olt VT e GAS FLOW NEN a MEE we OIL FLOW L AE matw n e ath SELF SFALING Ol RETURN QIL RETUAN COUPLING ORIFICE FILTER Model 125 Cryopump Compressor Users Manual 3 4 Model 125 Cryopump Compressor Introduction O z i Figure 3 2 Flow Diagram for Air Cooled Model 125 Compressor HELIUM RETURN KEY HELIUM SUPPLY GAS FLOW OIL FLOW SELF SEALING COUPLING DIFFERENTIAL PRESSURE RELIEF VALVE 200 PSI RELIEF E Ed VALVE 350 PISG COMPRESSOR OVERLOAD PROTECTOR HOT OIL GAS THERMOSTAT CHECK QIL MIST VALVE SEPARATOR OIL COOLING L FILTER FAN TI OIL RE TURN FILTER ORIF ICE COMPRESSOR OIL PUMP
15. head etc check for leaks in the load also Use only 99 999 pure helium gas To add helium gas 1 Remove the flare cap of the gas charge fitting on the rear of the compressor 2 Loosely attaching a charging line from the helium pressure regulator on the helium pressure bottle to the 1 4 inch male flare fitting installed on the helium charge valve A user supplied helium charging line terminating in a 1 4 inch female flare fitting and a pressure regulator rated at 400 psig delivery pressure is required Model 125 Cryopump Compressor Users Manual 7 4 7 4 2 13 Caution 7 6 RD Model 125 Cryopump Compressor Maintenance ENTS 3 Set the helium pressure regulator to 10 to 25 psig Allow helium gas to flow through the charging flare fitting for 30 seconds to purge the charging line of air Then tighten the flare nut at the end of the charge line a If the compressor is running under normal operating conditions set the helium pressure regulator to 325 psig and slowly open the helium charge valve in the rear of the compressor When the helium supply pressure gauge rises to 250 to 260 psig tightly close the charger valve b If the compressor is not running set the helium pressure regulator to 250 psig and slowly open the helium charge valve When the helium supply pressure gauge rises to 190 5 psig tightly close the charge valve 4 Insure that the helium charge valve on the compressor is tightly closed Then shut
16. hen the compressor is in operation the ambient temperature should be between 5 C to 40 C 40 F to 104 F The compressor unit should be set up in a non condensing environment Coolant Connection For water cooled compressor models the water used in the unit operation must meet the specifications indicated in Section 3 2 Coolant Specifications Failure to comply with the coolant specifications may result in serious damage to the compressor and may void the warranty on the unit Identify the inlet and outlet connection ports first before connecting the hoses The water supply line should be connected to the inlet port on the compressor Periodically check the coolant flow rate and temperature to ensure the proper operation of the compressor unit Connecting the Helium Flexlines Attach or detach the helium flexlines only when the power to the compressor unit is switched off Never twist the helium flexlines during the installation process Before connecting the helium flexlines follow these steps 1 Identify the helium Return low pressure and Supply high pressure ports on the compressor front panel 2 Clearly mark the helium flexline that will be used to connect to the corresponding Supply and Return port on the cryopump or coldhead The helium flexlines are equipped with self sealing couplings which can be attached and detached without helium escaping Follow these steps to connect the helium flexli
17. ies This document is the property of Austin Scientific and by furnishing this information Austin Scientific grants no license express or implied under any patents copyrights trademarks trade secrets or other intellectual property rights of Austin Scientific Austin Scientific copyright owner of the information contained herein gives consent for copies to be made of the information only for use within the customer s organization as related to the use of Austin Scientific products The same consent is given for similar information contained on any Austin Scientific Web site or disk used to distribute information to a customer Austin Scientific does give consent to the copying or reproduction by any means of the information contained herein for general distribution advertising or promotional purposes or for creating any work for resale The names of products of Austin Scientific or other vendors and suppliers appearing in this document may be trademarks or service marks of their respective owners that may be registered in some jurisdictions A list of Austin Scientific trademarks and service marks can be found at http www austinscientific com Austin Scientific An Oxford Instruments Company 4114 Todd Lane Austin Texas 78744 USA TEL 1 512 441 6893 FAX 1 512 443 6665 Email Info austinscientific com Copyright 2006 by Oxford Instruments All rights reserved Model 125 Cryopump Compressor Users Manual ii O FORD Content
18. in Chapter 7 Section 7 3 To remove the compressor unit from service do the following 1 Turn off the compressor unit by pressing the OFF button N Switch off the main power supply to the compressor W Separate the compressor unit from the main power source A Allow coolant to continue circulate for at least 10 more minutes for water cooled model 5 Allow the compressor load cryopump coldhead etc to warm up before detaching helium flexlines Loosening or detaching helium flexlines with the compressor load at low temperature without proper warming up can result in loss of helium and or pressure rise in the compressor unit beyond its designed maximum pressure level When transporting the compressor unit follow these guidelines Make sure the appropriate protective caps are properly secured before shipping Always store the compressor unit in a dry place Refer to Chapter 3 Chapter 3 3 for proper storage environment f a freezing temperature environment is anticipated whether during shipping or under storage make certain the coolant in the compressor circuit is properly drained The compressor unit should never be tilted more than 45 degrees either during shipping or in storage Model 125 Cryopump Compressor Users Manual 7 1 Model 125 Cryopump Compressor Maintenance z l 7 3 Caution 7 3 1 7 3 2 Scheduled Preventative Maintenance Activity The only scheduled maintenance required on
19. n isolated from the power supply Connecting or disconnecting the line joining the compressor and its load cryopump coldhead etc only after the compressor is switched off and separated from the power source Otherwise there will be electrical shock hazard and causing the compressor unit and its load being damaged Always provide proper grounding to the compressor unit All electrical connection and disconnection of the unit should be done by a qualified and licensed electrician High Voltage is present within the system and can cause severe injury from electrical shock Permit only qualified electrical technicians to open any electrical enclosure lo perform electrical troubleshooting Disconnect the compressor from its power source before carrying out any troubleshooting or maintenance activities High Pressure Related Warnings High Gas Pressure is present within the system and can cause severe injury from propelled panicles or pans Vent the compressor before removing or opening any parts except when disconnecting the Aeroquip self sealing couplings Do not recharge the system without using a pressure regulator Model 125 Cryopump Compressor Users Manual 2 1 Model 125 Cryopump Compressor Safety Warnings 2 2 3 Warning Warning Warning 2 2 4 Warning 2 3 Helium Gas Related Warnings Helium gas can cause rapid asphyxiation and death if released in a confined and unvented area Use a pressure reducing reg
20. n aaa aa aa aaka 3 7 4 Install ciar ia A NA ie ka BY E 4 1 41 Safety Warnings erat codage aes nerd Ete rice ee Tek dade ud Da La AY Rd ken an ap pw 4 1 42 Installation Steps eee cot o Bila da san RC esee Eee e Por yan ee 4 1 4 2 1 Unpacking and Inspection 00 eee cee ence cee eeeneeeeeeeaaaeeeeeseaaeeeeeeeaaaeeeeeeeaeeeeeseaaaes 4 1 4 2 2 Mounting the Compressor sssssssssssssseeeeeene nennen nnne nennen nennen nnns 4 1 4 2 3 Preparing the Compressor for Operation sse 4 1 A 2 4 MStAllAtION em 4 2 4 2 4 1 Ambient Conditions and Coolant Connection ssssssss 4 2 4 2 4 2Connecting the Helium Flexlines eeennee 4 2 4 2 4 3Filling the Compressor with Helium Gas seeeee 4 3 4 2 4 4Adjusting Helium Gas Pressure sss 4 3 4 2 5 Electrical Connection marvnnannnnnnnvvnannrnnnnnnvnnnnrnnnannvnnnnrnnannnnenennrennnnnnnnnnrnssrnnnennnee 4 3 WEGJruparseece c M 5 1 5 1 Before Switching On the System snrenrnrrnnannnvnnnrrrnnnnnnnnnrrrnnnnrnnnennernnrnnnenvensnnrnnnnnnnnnenn 5 1 52 Normal Operational 5 1 6 Troubleshooting iii ii A 6 1 6 1 Troubleshooting Activitles etre cere ect enden 6 1 LIMA ANC ici 7 1 7 1 Maintenance Personnel Requirements essssseeeenne eene 7 1 Model 125 Cryopump Compressor Users Manual
21. n tipped over Mounting the Compressor It is highly recommended that the compressor unit be installed on a level and steady surface If the unit must be installed in a tilted manner the maximum tilting angle is 10 degrees Tilting the unit more than this maximum allowable angle could result in damage and contamination in the system and may void the warranty on the unit Preparing the Compressor for Operation 1 Connect the main power cable to a suitable connector or disconnect box making sure that the compressor switch is off 2 Forwater cooled Model 125 units connect the cooling water a Typical municipal drinking water is recommended b 0 4 to 0 5 gpm is required to achieve a maximum discharge temperature of 100 F with 80 F considered ideal Model 125 Cryopump Compressor Users Manual 4 1 Model 125 Cryopump Compressor Installation O F ORD 4 2 4 4 2 4 1 Caution Caution 4 2 4 2 Caution Note INSTRUMENTS 3 For air cooled Model 125 units make sure the front and rear grills have at least 12 inches of clearance from the nearest objects 4 Verify that helium pressure is between 190 5 psig If pressure is low refer to Chapter 7 for charging procedures 5 Start the compressor and run for about 15 minutes to stabilize the compressor oil inventory 6 The compressor is now ready to be connected to the cryopump Installation Ambient Conditions and Coolant Connection Ambient Conditions W
22. nes 1 Unscrew the protective caps from the couplings and keep the caps for future use 2 Check the connectors for cleanness When necessary use lint free clean cloth or soft brush to clean the connectors 3 Check the flat seals on the male couplings and make sure they are properly placed Replace any missing or defective seals Model 125 Cryopump Compressor Users Manual 4 2 Model 125 Cryopump Compressor Installation 4 2 4 3 Caution 4 2 4 4 4 2 5 Caution INSTRU Q FORD fl 4 Use only the open wrenches supplied with the installation kit For a 72 coupling tighten with a 1 3 16 wrench and stabilize with a 1 wrench 5 Tighten down all couplings as far as possible and then back off by one quarter turn to relieve strain If the flexlines need to be bent to a radii of less than 8 20 cm then a 90 degree helium elbow needs to be installed see Section 3 3 for the part number Filling the Compressor with Helium Gas All safety regulations related to handling pressurized gas cylinders must be observed Only use helium with 99 999 or better purity when performing refill operation Follow these steps 1 Connect a pressure reducer and a helium flexline to a helium supply gas cylinder 2 Connect the open end of the helium flexline to the helium gas charge vent valve on the rear panel of the unit do not tighten the 1 4 flare connector on the end of the flexline 3 Open the valve at the cylinder 4
23. ntenance manifold for helium clean up process on 10134 compressors and cryopumps Cryopump drive cable 10ft sends power to the cryopump 10144 10 motor from the compressor Custom length available Model 125 Cryopump Compressor Users Manual 3 8 ustin Scientific an Oxford Instruments company Installation 4 4 1 4 2 4 2 1 Caution 4 2 2 4 2 3 Safety Warnings Review the safety warnings in Chapter 2 before beginning any installation activities Installation Steps Unpacking and Inspection Once the equipment is received inspect the exterior of the shipping carton for any signs of damage Report any damage to the shipping company immediately Remove the straps and packaging materials on the compressor unit then lift or roll the unit out of the carton carefully Inspect the exterior of the unit If any damage is observed inform the shipping company Keep the original packaging materials in case the unit needs to be returned to the factory for service or other reasons Most shipping companies have a certain grace period for reporting damages due to shipping in order to process the insurance information in a timely manner Therefore it is highly recommended that shipping carton be opened and the unit inspected whether or not it will be put into operation right away When transporting or storing the compressor unit make certain it is not tilted by more than 45 degrees to avoid the unit bee
24. ocess Helium gas purification must occur because the heat exchanger still has a small amount of oil vapor mixed with it If this helium gas gets to the cryopump with oil vapor in it the oil will freeze and foul the cryopump The function of the oil mist vapor separator is to rid the helium gas steam of this oil vapor The condensate from the oil is then returned to the capsule The helium gas still contains a small quantity of oil vapor at this point The adsorber then filters out the remaining oil vapor from the helium gas stream Overtime the adsorber may become saturated from the oil vapor Thus it is important the adsorber be replaced according to the recommended replacement interval Description of Subsystems Along with the four main components Table 3 1 describes the subsystems that serve to monitor the operating condition of the compressor unit and to ensure its safe operation Table 3 1 Model 125 Cryopump Compressor Subsystems Subsystem Name Function Purpose Monitors helium temperature upstream of the heat exchanger Safety Function Will turn off the compressor if the helium temperature gets too high Thermal switch TS1 Purpose Monitors helium temperature downstream of the heat exchanger Safety Function Will turn off the compressor if the helium temperature gets too high Thermal Switch TS2 Purpose and Safety Function Equalizes Bypass valve pressure within the compressor unit upon power in
25. off the helium pressure regulator on the helium bottle Remove the charging line from the male flare fitting and reinstall the flare cap Removing Helium Contamination Helium contamination is usually indicated by irregular noisy or intermittent operation ratcheting and sometimes seizure of the cryopump drive mechanism This is caused by accumulation of frozen contaminants within the compressor load and resulting in interference The source of the helium contamination is due to either Inadvertent introduction of ambient air into the system Use of helium with purity of lass than 99 999 such as helium gas used for leak detection and welding Steps to decontaminate the helium circuit Minor contamination can usually be removed by running the cold cryopump for several hours to trap contaminants in the cryopump then shut down the compressor and immediately remove the helium lines at the compressor Allow the cryopump to warm thoroughly then perform the cleanup procedure as outlined in the cryopump manual Cleaning Equipment Stubborn contamination involving water vapor requires decontamination of the compressor One effective method involves supplying clean helium to the return side at appropriate pressure while venting a small amount of gas from the supply side while the compressor is running This is referred to as a running purge Contact Austin Scientific if such a procedure is needed Do not use solvents to clean the connec
26. pair cryopumps and compressors Other Services from Austin Scientific Austin Scientific offers a broad range of additional services Repair and refurbishment services Whatever brand of cryo components you have we offer fully warranted refurbishment often with off the shelf availability Exchanges We offer our own quality products as well as most makes of cryopumps and helium compressors which are refurbished and fully warranted Technical Support Our support engineers will help determine if your cryopump system is operating correctly so that you can get your system back to optimum efficiency as soon as possible To contact Austin Scientific Technical Support Email support austinscientific com Telephone 1 512 441 9258 or Toll Free 1 800 404 1055 Installation On site installation services are available to guarantee performance and save you time Training We offer on site training to help you and your staff to know more about your cryopump and compressor systems Our training will give you confidence and the ability to maintain a highest possible uptime for your system About this Manual The purpose of this manual is to provide our customers using the Model 125 Cryopump Compressor with the information needed to safely and efficiently operate the compressor when operating as part of a cryogenic refrigeration system Such a system is often comprised of the following equipment Model 125 cryopump compresso
27. r unit Model 125 Cryopump Compressor Users Manual 1 1 Model 125 Cryopump Compressor Preface 1 4 Coldhead cryopump Connecting Helium lines This manual describes the design operation and maintenance of the M125 compressor unit Compatibility The Model 125 Cryopump Compressor is compatible with the cryopumps and coldheads described in Table 1 1 Each Model 125 Cryopump Compressor can be used to run one such cryopump or coldhead Table 1 1 Compatible Configurations Compressor Drive Circuit Configurations Scott T 350CS Cold Heads CTI 350CP CP8 Cryopumps CP8LP CT8 Model 125 Cryopump Compressor Users Manual 1 2 ustin Scientific an Oxford Instruments company Safety Warnings 2 2 1 2 2 2 2 1 Warning Warning Warning Warning Warning 2 2 2 Warning Warning Standards for the Use of Warnings and Cautions Warnings are noted when there is a possibility of injury or death to persons operating the equipment or performing specific tasks or procedures noted in this manual Cautions are noted when there is a possibility of damage to equipment if the caution is ignored Warnings Applicable to All Aspects of the Operation of Model 125 Cryopump Compressor High Voltage and Electrical Shock Warnings Potentially fatal voltages are present in the compressor unit Before beginning any work on the compressor unit the compressor needs to be switched off the
28. s INSTRUMENTS Contents MEC Om Em 1 1 1 1 About Austin Scientific seen nennen nnns nnns 1 1 1 2 Other Services from Austin Scientific ssssssssseeeeeenenennes 1 1 13 ADOUT IMIS CUL 1 1 14 eue mmm 1 2 2 Safety Warnings rises sees konik kouw bu ko kos levee da ak veces ua edi aet amu aarda kat Qa a edu kd m ka pa kn 2 1 2 1 Standards for the Use of Warnings and Cautions vvlreeeverreeerorsaorenononsaooonnanonn 2 1 2 2 Warnings Applicable to All Aspects of the Operation of Model 125 Cryopump Compressor NN 2 1 2 2 1 High Voltage and Electrical Shock Warnings ssseseeeee 2 1 2 2 2 High Pressure Related Warnings urannnvvnnnnonnrnnnnnnnrrnnnnennnrrnnnrrnnrnnnsrennnrnesrnrnnnnnn 2 1 2 2 3 Helium Gas Related Warnings sss eene 2 2 2 2 4 Heat Related Warnings sss eene nennen 2 2 2 9 Operator Instr cllOliss uic eret einer reet n rgo Lu dt ko tit poet 2 2 3 fa 1016 10 02 0 0 e 3 1 3 1 General Information about the Model 125 Compressor sse 3 1 3 1 1 Model 125 Features tede tk iii ek mdt it a ab a ka it 3 1 3 1 2 Overview of Model 125 Compressor Design Operation se 3 1 3 1 3 Description of SUBSYSTEMS serisinin iannau iaaa anaa aana aaa niaaa ana 3 2 3 1 4 Operational FIOW ossidasi etri ert ia aa iaaea i aa aiaia 3 2 Biz SPCCHICANOMS Pm 3 6 3 3 Ordering Informations adana
29. t depresses the safety interlock switch The compressor cannot be started until the switch is depressed 8 Make sure the supply pressure gauge reads 190 5 psig If the pressure is either too high or too low follow the instructions in Chapter 7 Section 7 4 1 to fill the helium gas to the proper pressure level 9 Add 10 000 to the reading of the elapsed time meter and write this number on the decal provided with the replacement adsorber This decal can be affixed to the foot of the compressor 10 Restart the compressor Figure 7 1 Location of Adsorber in Model 125 Compressor Model 125 Air Cooled Version Outlet Wa MAN Inlet Adsorber Outlet Adsorber Inlet Model 125 Cryopump Compressor Users Manual 7 3 Model 125 Cryopump Compressor Maintenance z RD l Figure 7 2 Self Sealing Coupling in Disconnected Closed and Partially Closed Positions Disconnected Position Connected Position Partially Connected Position LLAMAN AN yd 7 4 Unscheduled Corrective Maintenance The following corrective maintenance activities may be necessary should the helium gas circuit of Model 125 compressor becomes contaminated 7 4 1 Adding Helium Gas If a compressor unit needs to have helium gas added more than once every several months check for leaks caused by improperly connected self sealing connections or incorrectly sealed charge valve If the compressor unit is connected to its load cryopump cold
30. terruption Fuses Fuses for the coldhead drive circuit Fuses for the main input power Fuses for the fan motors Safety Function Over current protection Purpose Opens a shunt between the high and low pressure helium gas circuits Internal relief valve Safety Function If the differential pressure exceeds a preset value this valve opens to allow safe operation Purpose and Safety Function Opens the helium External relief valve gas circuit to atmosphere if the helium gas pressure exceeds 350 psi Operational Flow The work flow of helium gas within the compressor follows these steps 1 High pressure helium gas is delivered from the compressor to the coldhead through the Supply helium flexline at 250 260 psi Model 125 Cryopump Compressor Users Manual 3 2 INSTRU Model 125 Cryopump Compressor Introduction O F ORD i ENTS 2 The helium gas is then compressed during the compression stroke of the cryopump 3 The cryopump then expands the helium gas to expand during its expansion stroke During this cycle of compression and expansion of the cryopump the helium gas is forced through regeneration materials to increase the thermodynamic efficiency of the cycle 4 With each successive cycle the regeneration material becomes colder and colder Eventually the cryopump temperatures comes down to cryogenic range 5 After expansion the helium gas returns to the compressor through the R
31. tors The fittings should never be greased or oiled Otherwise the helium circuit could become contaminated Returning Equipment Before returning any equipment contact Austin Scientific to receive special instructions and to obtain a return authorization RMA number See contact information in Chapter 1 Section 1 2 Model 125 Cryopump Compressor Users Manual 7 5
32. trical Control Chassis and the components within Model 125 Cryopump Compressor Users Manual 4 3 FORD I INSTRUMENTS Q S 8 8 1 D S wm S amp S O a E 3 3 a Kel N S S Electrical Schematics Larger Print Attached at the End of This Manual Figure 4 1 Q o Dep a a a a i nd LLL LC LC oa 1 Ap en E E LI m m I 0 Lo m 1 0 Li E ig d ted I Yd 2 I Iu o 1 diou L xs n a pn m d p Hm 1Q i m pst 1 I d I I rit l Di I I pot A Tin 4 li eo bd m 2 ES 1 L A LA A NFI E ad zm Ly o EE o E ME eR 8 l ole li bg ale 5 i BE p o 8 o o L gt ati EN RARA EI y 8 Iu A an m pa ni ala 9 bd i 3g 2 o I Heal I lt pl m l d E Lou 2 i gt gt z E kou LE 4 Q 5d m I 4 EM T I ofo fepe Sto Ta I l rta I m m KA 1 1 I gt gt d Ew I i Ol foal I o
33. ulator when withdrawing Helium gas from a high pressure cylinder Detaching the helium flexlines when the compressor load is at low temperature may cause the pressure to rise in the system beyond the permissible level therefore creating a safety hazard Heat Related Warnings The compressor motor may become hot after operating Wait for the motor to cool down before working inside the compressor Operator Instructions Follow standard Model 125 operating procedures as described in this Manual If after reading this manual you still have questions regarding the safe operation of the Model 125 Cryopump Compressor please contact Austin Scientific Technical Support using the contact information found in Chapter 1 Section 1 2 Model 125 Cryopump Compressor Users Manual 2 2 ustin Scientific an Oxford Instruments company Introduction 3 3 1 3 1 2 General Information about the Model 125 Compressor Austin Scientific offers industry proven compressors such as the Model 125 Cryopump Compressor described in this manual at highly competitive prices and with flexible configurations Model 125 compressors are available in low voltage and in either air or water cooled model Model 125 Features Manufactured for over 15 years the Model 125 compressor is designed for tens of thousands of hours of continuous operation The main features of the Model 125 compressor are Minimal maintenance requirements Removable top cover
34. uses circuit breakers and wiring associated with the power source Repair as needed Check the compressor against the wiring schematic See Chapter 4 Figure 4 1 The compressor On Off switch SW1 will not remain in the On position The safety interlock switch SW2 is closed This will happen if the top cover of the unit is removed Thermal protection switch TS1 and or TS2 is closed High current has activated the trip switch in the compressor s On Off Switch Securing the compressor cover may correct the problem If not check for proper operation of safety interlock switch SW2 located in the top right side of the electronic control chassis See Chapter 4 Figure 4 2 Confirm that switch TS1 and or TS2 is open Contact the Austin Scientific service department for assistance Compressor stops after several minutes of operation and remains off High temperature of the compressor caused by insufficient cooling water for water cooled model resulting in the opening of thermal protection switch TS1 and or TS2 For air cooled model the ambient temperature is too high When the compressor is not in operation cold cooling water was left running through the compressor Insufficient helium static pressure High temperature helium gas tripped the thermal protection switch TS1 Low power source voltage Confirm that sufficient cooling water for water cooled model is flowing
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