Liberator G4 Manual Nov 07 12.qxp:G4 Liberator
Contents
1. 24 RP18 Vent Valve RR eskime ele amele e tinamaaki 24 RP19 Twist Lock ODM Lip Seal RR sesime semai at kama 24 RP20 Twist Lock OPV Poppet Assembly RR nA 25 RP21 Push on QDV Assembly RR sam aska masal amda 25 RP22 Push on Portable Pop Off Assembly 25 RP23 ED aa ei lan bal aaa 26 RP24 NV ALAN AD YE At aariaid ae Malan Acai ne riaal la 26 RP25 HO KAS 1 CSE AA AA 21 RP26 Operating Pressure TEOSE Mami ke ein ali ole 21 RP27 How Meter VEELE AOL sleek ai aada d a 21 RP28 Economizer Regulator RR mesa so adale gla A in 28 RP29 Economizer Regualtor Adjustment 28 RP30 Flow Control Valve ECV VR 2a aaa kaa 28 RP31 DE K meme ln a e YA el TE MT 29 RP32 Normal Evaporation Rate NER Test 29 D Service Tools Fixtures Equipment Supplies eek aNd 30 Introduction 1 These procedures are designed to be performed only by qualified personnel with proper equipment 2 Any failure during routine maintenance checks will refer you to this section See troubleshooting chart for appropriate procedure PN 10662679 Rev L Troubleshooting Chart Remove Replace Defective Part Replace Relief Valve Replace Battery Calibrate Meter Remove Pa Manifold Capacitance lt Low Test Good Calibrate Wire Broken 2 Meter Replace Probe Reassemble Manifold PN 10662679 Rev L Troublesh2. 60 70 70 80 80 25 25 30 40 RP 9 Manifold Assembly RR Figure 13 Remove shroud assembly See RP 2 Disconnect compression fitting Item 34E from top of econ omizer valve Item 35 Also disconnect compression fit tings on the sides of the economizer valve Item 35 Disconnect compression fitting from liguid withdrawal port Item D being careful not to kink vaporizer coil or internal PTFE tube Disconnect compression fitting Item 34F from FCV Item 24 If desired follow RP17 to remove coils from the top of the Liberator in order to make manifold removal easier Remove the three bolts Item 31 that run through the FCV bracket Item 39 and through the manifold plate into the top of the dewar Remove two remaining manifold mounting bolts Item 31 not visible in Figure 12 while holding manifold in place Lift manifold assembly straight up to remove Place dewar cap on dewar opening To replace manifold assembly reverse above procedure Apply small amount of fluorolubricant to O ring Item 50 be fore assembly Torgue manifold mounting screws Item 31 to 10 11 N m 90 100 in lbs using cross tightening method Repair Procedures RP10 Resolder Feed thru Wire Figure 14 FIGURE 13 Manifold Assembly a Remove manifold assembly See RP9 b Strip approximately 1 8 of insulation from feed thru wire Item A if necessary c Remove strain relief material h
3. LIBERATOR G4 FT o CA RE Innovation Experience Performance A Chart Industries Company Preface SERVICE MANUAL LIBERATOR SERIES G4 LIB20 LIB30 LIB37 LIB45 LIB60 CAIRE Inc 1800 Sandy Plains Industrial Parkway Suite 316 Marietta GA 30066 6363 www cairemedical com Customer Technical Service United States Phone 800 482 2473 Fax 888 932 2473 Asia Australia Pacific Rim Phone 61 297 494333 Fax 888 932 2473 Europe Phone 44 1344 403100 Fax 888 932 2473 Abbreviations FCV Flow Control Valve PRV _ Primary Relief Valve LED Light Emitting Diode ODV Quick Disconnect Valve LOX Liquid Oxygen RMA Return Materials Authorization LPM Liters Per Minute RP Repair Procedure NER Normal Evaporation Rate RR Removal and Replacement POT Patient Operating Instructions SRV Secondary Relief Valve N2 Nitrogen Gas O2 Oxygen Gas TF Top Fill SF Side Fill DF Dual Fill PTFE Polytetrafluoroethylene Teflon Definition of Terms WARNING Description of a condition that can result in personal injury or death CAUTION Description of a condition that can result in equipment or component damage NOTE A statement containing information important enough to emphasize or repeat ITEM Item numbers used throughout this manual are shown on the illustrations beginning on page 34 Disclaimer This manual is intended for use by experienced personnel only No attempt should be made to fill or maintain this equipment u
4. PTFE tape b Connect gauge assembly to DISS fitting on FCV outlet Open FCV Item 24 to 6 LPM setting c Read operating pressure on pressure gauge Item H d Operating pressure must be 1 2 1 5 bar 18 22 psig or unit TABLE 11 Flow Test Acceptable Ranges fails test FCV Sening MO RP27 Flow Meter Verification po OFF 01510035 a Flow meter accuracy is best verified by a calibration labo 0 40 to 0 60 ratory Equipment should indicate liter per minute oxygen 0 65 to 0 85 gas at atmospheric pressure and 21 C 70 F 0 90 to 1 10 b Flow meter accuracy may also be tested by comparison to 1 35 to 1 65 one or more new unused calibrated flow meters This 1 80 to 2 20 method will increase confidence in accuracy of readings 22510215 but not necessarily verify accuracy 2 70 to 3 30 31510 385 36010440 PN 10662679 Rev L LPM 9 9 9 9 9 9 9 9 9 9 9 9 9 Repair Procedures FIGURE 25 Economizer Regulator FIGURE 26 Economizer Test Setup Pressure Source Valve Set Above Desired Regulator Setting at Ge PN 10662679 Rev L RP28 Economizer Regulator RR Figure 25 WARNING Liberator must be empty and vented before starting this procedure a Remove shroud See RP2 b Loosen the three compression fitting nuts Item 34 at the economizer regulator Item 35 Move coils on the sides and economizer tube Item D away from the econ omizer regulator Item 35 c Follow RP29 to ensu
5. These hazards require certain safety precautions to be taken when working with or around gaseous and or liquid oxygen 1 Never permit combustible substances such as greases oils solvents or other compounds not oxygen compatible to contact any component of the unit exposed to higher than atmospheric concentrations of gaseous or liquid oxygen This especially applies to tubing fittings and valves 2 Keep oxygen equipment away from open flames or electrical appliances such as heaters stoves toasters and other devices with heating elements 3 Never permit smoking in an area where oxygen equipment is repaired filled or used 4 Always wear goggles a face shield and insulated gloves when working with or around liquid oxygen While CAIRE Inc equipment is designed and built to the most rigid standards no piece of mechanical equipment can ever be made 100 foolproof Strict compliance with proper safety practices is necessary when using any Liberator unit We recommend that our distributors emphasize safety and safe handling practices to their employees and customers While safety features have been designed into the unit and safe Operations are anticipated it is necessary that all distributor personnel carefully read and fully understand WARNINGS CAUTIONS and NOTES throughout the manual Periodic review of this information is recommended CAUTION The Liberator should be moved by utilizing the roller base or hand truck Do
6. Top 1 4 20 1 6 23 2 1 30 0 68 1 5 2 9 2 5 83 2 32 75 35 6 14 22 7 50 64 4 142 PN 10662679 Rev L 319 Side Top 1 4 20 1 6 23 2 1 30 0 68 1 5 4 0 3 0 94 0 37 35 6 14 24 9 55 75 7 AGT Specifications Nominal Values LIBERATOR 45 LIBERATOR 60 65 3 144 60 0 49 200 OH 0 25 0 50 0 75 1 0 1 5 2 0 2 5 3 0 4 0 5 0 6 0 8 0 10 12 15 410 Side Top 1 4 20 1 6 23 2 1 30 0 73 1 6 55 4 0 99 1 39 40 6 16 29 9 66 95 3 210 Safety Oxygen as it exists at standard atmospheric pressure and temperature 1s a colorless odorless and tasteless gas Oxygen constitutes 21 of the atmosphere by volume Aside from its well documented ability to sustain life oxygen also supports combustion even though it is nonflammable Many substances which will burn in air burn at a faster rate and at a higher temperature in an oxygen enriched atmosphere Other materials that do not burn in air will burn as oxygen concentration increases Additionally many greases and liquid solvents become extremely hazardous materials when placed in an oxygen enriched environment In its liquid form oxygen is still odorless and tasteless but is pale blue in color At an operating pressure of 1 4 bar 20 psig the temperature of liquid oxygen is about 173 C 280 F Skin exposed to such a low temperature can become severely frostbitten
7. for 3 sec to record empty ca pacitance reading LED 1 will flash for 3 sec b LED 1 will flash to signify successful calibration If an er ror occurs certain LEDs will flash signifying a specific error code and the calibration value will not be saved See Table 8 for a list of error codes Calibrate Full Capacitance There are two full capacitance procedures available Procedure 1 is guite accurate and guicker to perform since it does not re guire you to fill the dewar Procedure 2 is even more accurate but reguires the dewar be vent full with LOX To start either procedure calibration mode must first be entered There is no need to perform both procedures for any given calibration NOTE Please use only one of the following calibration methods TABLE 7 Capacitance Span LED Settings DED Setting Liberator 20 LED 2 Liberator 30 LED 3 LED 3 Liberator 45 LED 7 Liberator 60 LED 5 Procedure 1 Capacitance Simulated Full Method Liberator 37 a Press the operate button 3 times within a 5 sec period of entering calibration mode One of the LEDs will light con tinuously b Press the calibrate button until the correct LED is continu ously lit See Table 7 c Press the operate button to save the calibration If an error occurs the calibration value will not be saved Procedure 2 Fill Method a Enter calibration mode on a vent full unit with properly sat urated LOX If unit has just been filled all
8. left to the right signifying the liquid level in the cylinder 1 LED for empty 8 for full If you feel the meter is giving incorrect measurements reference RP7 to calibrate the meter Cleaning and Disinfection To insure proper functioning and end user safety all Liberator units should be cleaned whenever dirt or grime 1s visually appa rant The unit should be disenfected according to any applicable local regulations or the home healthcare distributor s own de contamination schedule Preparation Prior to cleaning or disinfection the unit should be completely purged of LOX The technician should wear appropriate safety gear and prepare mild solutions of glass cleaner or Simple Green available at www simplegreen com and disinfectant respec tively If at any time either solution becomes visibly dirty or cloudy it should be switched out for fresh solution Cleaning 1 Inspect through air holes in shroud to see if any debris has ac cumulated beneath shroud If it has remove debris using long tongs or tweezers 2 Wipe off the exterior of the unit with the cleaning solution us ing a lint free cloth The cloth should be damp but not drip ping Be as thorough as possible 3 Discard the cleaning cloth 4 Wipe off excess cleaning solution and dry thoroughly with a lint free cloth Discard the cloth Disinfection Disinfection should be performed in accordance with the home healthcare provider s own validated pro
9. not roll units on their side or edge as insulation damage can occur The Liberator must be used stored and transported in a vertical position Do not lay store or ship on its side WARNING Excess accumulation of oxygen creates an oxygen enriched atmosphere defined by the Compressed Gas Association as an oxygen concentration above 23 In an oxygen enriched atmosphere flammable items may burn vigorously and may explode Certain items considered non combustible in air may burn rapidly in such an environment Keep all organic materials and other flammable substances away from possible contact with oxygen particularly oil grease kerosene cloth wood paint tar coal dust and dirt which may contain oil or grease DO NOT permit smoking or open flame in any area where oxygen is stored handled or used Failure to comply with this warning may result in seri ous personal injury WARNING In the event a unit is dropped tipped over or unreasonably abused immediately but cautiously raise the container to its normal vertical position If substantial container damage has occurred remove the liquid oxygen from the vessel in a safe manner RP23 Purge the unit with an inert gas nitrogen and promptly return it to CAIRE for inspection The container should be prominently marked CONTAINER DROPPED INSPECT FOR DAMAGE Failure to comply with these procedures may result in personal injury and can seriously damage the contain
10. 0107 CAIRE Inc Unit 2 Maxdata Centre Downmill Rd Bracknell Berkshire RG12 1QS United Kingdom All equipment returned to CAIRE Inc must be shipped prepaid When the defective item s is received at CAIRE Inc it will be serviced and returned to the distributor as soon as possible A copy of the Repair Cost Sheet will be enclosed giving a detailed listing of any maintenance performed Restocking Policy If it becomes necessary to cancel an order with CAIRE Inc after the shipment has been received use the following Restock Policy procedure 1 Notify the Customer Service Department at CAIRE Inc using the toll free number When contacting Customer Service personnel it will be necessary to relay the follow ing information a State the quantity and description of equipment to be re turned b Give the Serial Number of each unit to be returned c State the equipment purchase date 2 A RMA number will be issued in the name of the distribu tor by CAIRE Inc for the equipment to be returned When the equipment is shipped to the factory the RMA number must appear on the packing slip 3 All equipment must be returned prepaid to CAIRE Inc 2000 Airport Drive Ball Ground GA 30107 CAIRE Inc Unit 2 Maxdata Centre Downmill Rd Bracknell Berkshire RG12 1QS United Kingdom 4 Finally a Credit Memo minus a 15 restocking fee will be issued to the distributor when al
11. 3329091 Description Female Top Fill Pneumatic Test Adapter Female Top Fill Transfer Line Adapter 240 AC Fluorolubricant Leak Detection Fluid gallon Frie Liter Meter Male Side Fill Pneumatic Test Adapter Male Side Fill Transfer Line Adapter w Filter Transfer Line Adapter Cover Pressure Gauge Adapter Replacement Filter Male Transfer Line Adapter Jeweler s Screwdriver Vent Valve Wrench Capacitance Meter Dewar Cap 0 4 1 bar 0 60 psig Pressure Gauge Transfer Line Swivel Connector 0 3 1 bar 0 45 psig Oxygen Regulator Hand Truck w Stair Climber Pneumatic Hose with DISS Fittings Liquid Oxygen Transfer Line 2 m 6 ft Lip Seal Service Tool 10 3 bar 150 ps1 Relief Valve Assembly TEFLON Tape 10 3 bar 150 ps1 Relief Valve only Tandem Tee Kit Super Flex Liquid Oxygen Transfer Line 6 Dual Fill Head Tee Service Manual Conversion Kit TF to SF Conversion Kit SF to Dual Conversion Kit TF to Dual Conversion Kit SF to TF G4 Capacitance Meter Adaptor Kit For a complete list of accessories see catalog 401 038 901 PN 10662679 Rev L XIV Parts Price List Contact Customer Service or visit www cairemedical com to obtain your parts price list PN 10662679 Rev L Orderin Ordering Information The following steps should be used when ordering a new Liberator or replacement parts for an existing unit 1 Compile a list of all equipment and replacement parts to be ordered NOTE Use the f
12. 57 b Remove condensate bottle bracket Item 57 squeezing legs together and pulling straight down c To replace bracket reverse above procedure RP4 Liquid Level Meter RR a Remove shroud See RP2 b Remove two screws attaching liquid level meter to the bracket being careful not to pull on the meter wires c Detach JST connector red signal wire and spade connector black ground wire d To replace meter screw new meter into place using the top set of holes on the meter and reattach wires e Calibrate meter per RP6 RP5 Liquid Level Meter Battery RR NOTE Tampering with meter battery housing will void the bat tery s 2 year warranty If meter battery failure occures while the battery is under war ranty contact customer service to obtain a replacement meter If meter battery is no longer under warranty the CR2032 coin cell battery may be replaced following the steps below a Remove liquid level meter See RP4 b Using a pair of pliers grasp the battery cover on the back of the meter Twist counter clockwise and pull the cover away from the meter removing the battery cover c Slide the tip of a flathead jeweler s screwdriver beside the battery and carefully pry out the battery PN 10662679 Rev L Repair Procedures d Insert new battery with the positive terminal facing up e Applyathin coating of fluorolubricant to the o ring f Replace battery cover by pushing it into the bac
13. Reattach pop off assembly to unit being sure the pins at the bottom of the pop off lever slide into the groove at the base of the pop off sleeve f Reverse the remainder of the procedure to reinstall FIGURE 21 Top Fill Push on QDV Assembly PN 10662679 Rev L Repair Procedure FIGURE 22 Emptying Unit 4 FIGURE 23 Warming Unit RP23 Empty Unit Figure 22 WARNING Make sure open end of transfer line remains inside cryogenic container Wear insulated gloves and eye protection when using this procedure DO NOT reuse liquid oxygen a Place one end of the transfer line Item A into a suitable cryogenic container such as an empty clean Liberator de war Connect a male transfer line adapter Item B to the other end of the line b Connect the adapter to the Liberator QDV Item 15 keep ing the vent valve Item 41 closed c Liquid oxygen will be discharged from the open end of the transfer line into the empty container Continue process un til Liberator is empty d If Liberator has no pressure pressurize with the following procedure 1 Connect regulator Item C to oxygen gas source 2 Connect pneumatic hose Item D to regulator and Liberator DISS Fitting Item E 3 Adjust regulator Item C to supply up to 1 4 bar 20 psig 4 Set Liberator FCV Item 24 to 6 LPM setting 5 Continue until Liberator is empty RP24 Warm Unit Figure 23 a Liberator may be allowed to si
14. adjusted so it will not exceed maximum prescribed flow rate Transport a Remove FCV knob by firmly grasping the knob and Specifically designed roller bases are available for moving pulling away from the base unit Liberators short distances on smooth surfaces Hand trucks can KN also be utilized for Liberator transport b Remove two phillips head screws Item 4 from flow lock plate Item 3 and remove plate ETO PN 10662049 Rev L Liberator 20 30 37 45 and 60 units may be moved about or transported in a vehicle while full without damage however they should not be dropped or handled roughly in order to prevent necktube damage Filling NOTE The fill source should have the correct fitting 5 8 x 45 male flare to connect to transfer line 1 Fill Source Preparation a Ensure the source contains a sufficient amount of liquid oxygen to completely fill the Liberator approximately 120 of Liberator volume b Ensure the liquid oxygen in the fill source is saturated at 2 4 4 1 bar 35 60 psig 3 4 bar 50 psig is optimal WARNING Fill source must be in a well ventilated area to prevent developement of an oxygen enriched atmosphere WARNING Wear insulated gloves and eye protection whenever working with liquid oxygen 2 Fill Procedure a Required Equipment 4 Fill source as outlined above 4 Liquid oxygen transfer line 4 Male transfer line adapter for side fill Liberators 4 Female transfer line adapter f
15. berator is full liquid oxygen is expelled Disconnecting the fill adapter from the Liberator QDV and closing the Liberator vent valve termi nates the fill process FIGURE 2 Filling Vent Valve TE Dm Liquid qA ee Fill Connection ODV Gas BE TE SS Saturation Pressure The saturation point of a liquid is a steady state condition where the liquid has absorbed the maximum amount of heat possible A liquid can be at its saturation point at a number of different pressures and temperatures but each specific satura tion pressure has a corresponding saturation temperature and vice versa see Figure 3 This means that the final temperature of your liquid oxygen is dependent upon the pressure at which it is transferred from the storage system to the Liberator For the purposes of this manual we will speak in terms of satura tion pressure since it is easier to control than temperature Treat saturation temperature as a dependent variable of saturation pressure PN 10662679 Rev L FIGURE 3 Temperature vs Saturation Pressure SATURATION PRESSURE BAR There are two conditions which can seriously affect the over all efficiency and operation of the system 1 Saturation pressure of the liquid oxygen in the fill source is substantially higher than the Liberator operating pressure oversaturated 2 Saturation pressure of the liquid oxygen in the fill source 1s substantially lower than the Liberator operating pres
16. cedures and or in accor dance with local regulations Table 1 shows disinfectants which have proven to be compatible with materials used in the construction of the Liberator base unit Table 2 shows actual material content of the Liberator base unit to assist the home healthcare distributor in establishing its own dis infection protocol Table 3 lists a selection of common disinfectant chemicals and their compatibility with Liberator base units TABLE 1 Recommended Disinfectant Solutions Microbac Bodie Chemie www bode chemie com Forte Hamburg Nee ere www wexfordlabs com Wex Cide Inc Note The above solutions are recommendations only and there ay be a number of other effective solutions TABLE 2 Liberator Material Content TABLE 3 Common Disinfectant Chemicals Disinfectant Agent Compatible with Generation 4 Liberators es Aldehyde ee Xe Compound S Sauerstoffabspalter MK Yes Ethanol based cleaner Alcohol only when all 02 has been purged pH Basic alkaline Cleaners Ether Ester based products End of Life At the end of the unit s service life all Liberator units must be returned to a recycling facility in compliance with the Waste Electrical and Electronic Equipment Directive WEEE or other applicable codes and regulations PN 10662679 Rev L Maintenance schedule A Biennial There are two schedules for routine maintenance which the home health care distributor may foll
17. ches 1 2 to 1 1 8 Side Cutters Pliers Torgue Driver Wrenches 12 17 N cm 10 15 in Ibs 23 29 N cm 20 25 in Ibs 69 92 N cm 60 80 in Ibs 104 115 N cm 90 100 in Ibs 6 2 6 9 N m 45 50 ft Ibs Jeweler s Screwdriver Required Fixtures Equipment L O 0 NN A On RK W WN pt pa pa ma nm pa a Go RK O N s QO 17 Capacitance Meter Soldering Iron Oxygen Regulator Pressure Gauge Pressure Gauge Adapter Flowmeter 02 Gas Source High Pressure bottle 02 Liquid Source N2 Gas or Clean Dry Compressed Air Source Tubing 02 compatible Lip Seal Service Tool Male Pneumatic Test Adapter LO2 Transfer Line Transfer Line Adapter with Filter Dewar Cap Vent Valve Wrench Scale 0 70 kg 0 150 Ibs 0 02 kg 0 05 Ib increments Required Supplies 1 O oo NN A On RK W NN Stay Clean Flux Cotton Swabs Lead free Solder Distilled Water Household Glass Cleaner Lint Free Cloth PTFE Tape Fluorolubricant Leak Detection Fluid Cleaner 1 Simple Green available at www simplegreen com Tools and Accessories available from Caire Part No 10679862 10678157 CA200071 CA200072 97200076 97212021 97212023 CA005571 97217007 CA400004 97403016 97202005 97403015 97403574 97403577 97404564 97405147 11847274 97405279 97405431 97405590 CA406308 CA406310 CA406398 97406471 97406555 97406630 13350704 10661515 10660361 10660344 10661523 1
18. clean dry nitrogen gas c Blow out inside of dewar with clean dry nitrogen gas until inside 1s clean and dry d Replace manifold assembly See RP9 CAUTION Be careful not to bend or damage manifold assembly or dewar neck tube Err PN 10662049 Rev L Repair Procedures FIGURE 15 M Valve Test Set up FIGURE 16 Primary Relief Valve RP13 Relief Valve Test Figure 15 A NOTE Liberator should be empty and warm before testing o Remove shroud See RP2 Assemble pressure gauge Item A and adapter Item B use PTFE tape Connect gauge assembly to humidifier adapter Item 26 on FCV outlet Open FCV Item 24 to 6 LPM setting Assemble oxygen regulator and pneumatic hose Item C with DISS fittings and male pneumatic test adapter Item D Connect assembly to oxygen gas source Connect male pneumatic test adapter Item D to Liberator QDV Item 15 Increase pressure to 1 7 bar 25 psig PRV Item 62 should open audible venting and or bubbling of leak test solution Hold PRV Item 62 closed and increase pressure to 2 3bar 34 psig SRV Item 28 should open audible venting and or bub bling of leak test solution Decrease pressure to 1 3 bar 19 psig Test relief valve with leak test solution A minimal amount of leakage bubbling is acceptable If leakage is questionable run pressure retention test before changing relief valve RP15 RP14 Relief Valve RR Primary Figu
19. e shipping charges for equip ment and parts will be added to the final invoice Payment for re placement parts are located on CAIRE Inc s invoice with payment date indicated All shipments will originate from Canton Georgia If a particular carrier or method of shipment is desired specify when placing order For additional ordering and contact information visit www cairemedical com PN 10662679 Rev L Restocking Policy When a Liberator is received it should be inspected immedi ately as outlined in Section VII Unpacking and Setup Instructions If a problem with the unit should be encountered reference should be made to the Troubleshooting Chart in Section X page 12 13 If these procedures do not provide a solution for the problem the following steps should be taken 1 Call CAIRE Inc Customer Service State the problem with the unit If it is determined that the problem cannot be solved by the distributor a Return Material Authorization RMA number will be assigned to the unit or part s If a Purchase Order Number is to be referenced please give this number to the Customer Service Representative at that time 2 Carefully package the parts or repack the unit in its origi nal shipping container precisely as shipped 3 Write the Return Authorization Number on the top of the shipping container 4 Return the unit or parts by professional carrier to CAIRE Inc 2000 Airport Drive Ball Ground GA 3
20. em 15 g Turn FCV valve Item 24 to Off setting h Allow unit to sit undisturbed for 60 minutes 1 Turn FCV valve Item 24 to 6 LPM setting j If pressure gauge Item A indicates less than 1 24 bar 18 psig unit fails test RP16 Plumbing Leak Test Figure 18 NOTE Liberator should be empty and warm before testing a Remove shroud See RP2 b Assemble pressure gauge Item A and adapter assembly Item B use PTFE tape c Connect gauge assembly to humidifier adapter Item 26 on FCV outlet Open FCV Item 24 to 6 LPM setting d Assemble oxygen regulator pneumatic hose Item C with DISS fittings and male pneumatic test adapter Item D Connect assembly to oxygen gas source e Connect male pneumatic test adapter Item D to Liberator QDV Item 15 f Increase pressure to 1 3 bar 19 psig g Leak test all connections joints and valves with leak test so lution NOTE PRV and SRV may leak slowly Repair all other leaks first and retest for pressure retention before changing relief valves h Close FCV Item 24 by turning to Off position Remove pres sure gauge assembly from humidifier adapter Item 26 i Disconnect pneumatic adapter Item D from QDV Item 15 j Leak test QDV poppet and FCV outlet k Repair all leaks by following appropriate repair procedures FIGURE 18 Plumbing Tests Set up 4 8 Ni JUL JUL gt PN 10662679 Rev L FIGURE 19 Co
21. er WARNING Personnel must remove liquid oxygen and depressurize the unit before removing parts or loosening fittings from a unit Failure to do so may result in personal injury from the extreme cold of liquid oxygen and or the pressure in the vessel WARNING During transfer of liquid oxygen components will become extremely cold Care should be used to avoid any contact with these components as serious frostbite may result WARNING During transfer of liquid oxygen gas blowoff from the vent valve creates a loud horn like noise Ear protection is recommended WARNING Keep filled unit upright at all times Tip over of filled unit may result in liquid oxygen leakage and or an oxygen enriched atmosphere WARNING Only use replacement equipment which is compatible with liquid oxygen and has been cleaned for oxygen use Do not use regulators fittings hoses etc which have been previously used in non oxygen service PN 10662679 Rev L Theory of Operation Filling The Liberator is filled by connecting a pre purged transfer line with a fill adapter from a larger liquid oxygen source to the Liberator side fill or top fill QDV The Liberator vent valve is then opened The pressure differential between the Liberator and source tank forces liquid oxygen through the transfer line and into the Liberator inner vessel There will be some oxygen vaporized during filling This gas is discharged through the vent valve When the Li
22. er and serial number on old dewar 1l legible 1 Calibrate meter by following RP7 RP32 Normal Evaporation Rate Test a Fill the unit with correct amount of properly saturated lig uid oxygen shown in Table 12 Values are approximate TABLE 12 NER Filling Key Empty kg Ib Lox kg lb Total kg Ib Lib 20 17 6 39 12 3 27 29 9 66 Lib 30 20 4 45 18 2 40 38 6 85 22 7 50 21 3 47 44 0 97 24 9 55 25 0 55 49 9 110 29 9 66 24 5 54 54 4 120 b Allow unit to sit undisturbed for a minimum of 12 hours with the FCV in Off position and the vent closed NOTE Scale must be accurate to 0 02 kg 0 05 Ibs c Weigh unit Record weight and time d Allow unit to sit undisturbed for a minimum of 24 hours e Weigh unit Record weight and time f Calculate liquid loss rate NER using the following for mula Weight lost kg or lbs NER x 24 hours day Elapsed time in hrs Example 0 63 kg NER x 24 hours day 25 5 hrs NER 0 59 kg day g If NER is more than 0 9 kg day 2 Ibs day for a Liberator the dealer may want to send the unit to CAIRE Inc for re evacuation If NER is more than 2 3 kg day 5 Ibs day the dealer should remove the unit from service and have the unit re vacuumed Service Tools Equipment Supplies Required Tools L 2 3 4 5 6 Fe 8 Hex Wrenches various sizes Flat Blade Screwdriver 5 16 Nut Driver Open End Wren
23. er shroud without removal for any visible dirt patient and when moving equipment between patients or contaminants B Procedure e Inspect drain tube for visible dirt Clean with a 6 cotton swab to remove dirt These inspections tests should be done by the driver as part of the Standard Fill Procedure every time the reservoir is filled 2 Verify that the meter battery is not low there are no error codes and the meter is within one LED of the table If the unit 1 Visually inspect for is empty verify the meter reads empty then fill with approx imately 7kg 15 lbs of liquid oxygen and verify using the a Broken shrouds chart b Cold sweaty bottles vacuum problem c QDV deformation 3 Set FCV to maximum flow rate for one hour Check all flow settings according to Table 4 and verify pressure remains 2 Check prescription flow rate s using an Erie liter meter above 1 24 bar 18 psig 025 LPM 3 Check the liguid level meter Push operate button before fill TABLE 6 Flow Test Ranges and verify that the battery is not low there are no error codes FCV Setting LPM and the meter reading is within one LED of the values shown OFF in Table 5 After filling verify that the meter reads full TABLE 5 Unit Weight kg vs Meter Reading L80 10 2 20 s EE 33510375 27010 330 71510 385 5 40 to 6 60 ma KEE EEE 72010880 90010 110 e asal na ana olma 4 If the unit fails one of the above tests return it to the Repair Cen
24. ethod is to attach a flow meter to the oxygen outlet set the flow control valve to 2 LPM and then throt tle the vent valve to maintain a flow of 2 LPM This is equivalent to using a pressure gauge m When liquid spurts from vent outlet disconnect transfer line n Close Liberator vent valve immediately after removing transfer line p Disconnect pressure gauge or flow meter from oxygen outlet and turn off FCV CAUTION Do not allow excessive venting of liquid oxygen through the vent valve Prolonged exposure may freeze the valve in the open position q Replace protective cover on QDV adapter and hang adapter and transfer line using hook provided r Verify that all flow rates are within tolerance specifica tion and that the liquid level meter indicates full NOTE The liquid level indicating system is accurate only after the vent valve is closed and the oxygen has stabilized for five minutes Operation Liquid Level Measurement As noted in the Theory of Operation Section 6 Generation 4 Liberators are equipped with new liquid level meters In order to obtain a liquid level reading the technician or end user should depress the green operate button on the face of the meter note that the button has been moved onto the meter from its previous position This will cause the LEDs to quickly flash from right to left around the meter s perimeter to indicate button activation The LEDs will then light from the
25. he inner vessel As the liquid oxy gen level rises the capacitance of this assembly goes up The level meter then displays the liquid level in the cylinder based on a calibration relating capacitance to fill level The higher the liquid level in the dewar the more LEDs are activated begin ning at the leftmost LED Electrical connection between the level meter and the probe is made via a single conductor JST connector This male plug is attached to its female counterpart extending from the probe creating a watertight connection A single ground wire is con nected from the meter to a male spade terminal on the mounting bracket The meter is powered by an internal battery offering battery life of 5 years or more at 30 cycles per day The meter has a low battery LOW BATT indicator which signals the need for bat tery replacement The meter battery is covered under a 2 year limited warranty If battery failure occurs within 2 years of the Liberator shipment date contact CAIRE Inc customer ser vice for a replacement meter If the meter battery is no longer under warranty the CR2032 coin cell battery can be replaced RP5 Replacement batteries can be found at most hardware stores or they can be ordered through CAIRE customer ser vice The new level meter improves upon the previous meter by in tegrating all components within its casing simplifying removal and replacement RP4 Even more importantly there is a much improved calibrati
26. he side of the FCV extension responding to maximum allowable flow rate 5 Visually inspect the Liberator for damage from improper e Replace flow lock plate Item 3 number disc Item 2 handling Note any dents in the container cracks in the and knob Tighten screws Item 4 to 45 65 N cm 4 6 shroud missing or loose hardware and bent quick discon in lbs Verify flow lock is at correct position nect valves or humidifier adapters 6 Check for smooth operation of the flow control selector making sure that a positive detent is felt at all settings The flow control knob should be secure and properly aligned 7 Check the vent valve for smooth operation 8 If possible connect a portable unit to the Liberator to check for smooth coupling and to make sure the portable unit is in proper alignment with the Liberator when mated 9 Verify operation of the level meter by depressing the operate button LEDs will light displaying the level of liquid oxygen If the unit is empty only the leftmost LED should light If it does not or if other erroneous indications are given refer to the Troubleshooting Section Section X 10 Check all labels for damage and wipe away any dust on unit C4UTION Always ship store or transport a Liberator empty with a clean dry lint free cloth or full in an upright position properly secured to prevent damage DO NOT ROLL UNITS TO TRANSPORT 11 Tf desired the flow control knob Item 1 can be
27. il and Vent Assemblies Repair Procedures RP18 Vent Valve RR Figure 19 a Remove shroud See RP2 NOTE Valve must be properly aligned to allow access to han dle through hole in shroud b Remove vent valve Item 41 by unthreading valve nut while supporting the valve to prevent it from turning NOTE Ensure static seal Item 67 is not damaged and is in its proper place c Replace vent valve Item 41 tighten vent valve nut to 60 67 N m 45 50 ft lbs Support the valve to prevent it from turning when tightening valve d Replace shroud See RP2 RP19 Twist Lock QDV Lip Seal RR Figure 20 NOTE Lip seal may be changed on a full Liberator Side Fill Only a Insert lip seal tool into Liberator female QDV Item 15 Engage tabs on tool with slots in retaining ring Item 87 RP17 Warming and Breathing Coil Assembly RR Figure 19 WARNING Liberator must be empty and vented before start ing procedure a Remove shroud See RP2 b Disconnect breathing coil Item 49 by unscrewing the tube nuts Item 34 at the FCV Item 24 and at the economizer Item 35 c Disconnect warming coil Item 45 by unscrewing the tube nuts Item 34 at the economizer Item 35 and at the mani fold d Disconnect coils by snipping zip ties Item B that hold them to the top of the Liberator e Remove warming and breathing coil assemblies by slightly bending them outwards and pulling them
28. is oriented exactly the same as the original part prior to installation CAUTION Some components require a specific amount 0 torque when assembling Follow torque requirements where specified NOTE All replacement parts must be factory approved cleaned for oxygen service and stored in sealed plastic bags The repair area must be clean and separate from other areas Room air should be filtered and free from dust soot and other contaminants NOTE When replacing components with pipe threads use PTFE tape thread sealant Apply two rounds of PTFE tape to threads near end of component avoiding first thread NOTE When assembling new compression fittings tighten 1 8 1 4 and 1 2 nuts eight flats past finger tight and 3 16 nuts five flats past finger tight When reassembling previously used compression fittings tighten nuts one to two flats past finger tight RP2 Shroud Assembly RR Figure 9 a Remove humidifier adapter Item 26 and FCV extension Item 25 from FCV Item 24 b Remove shroud mounting screw Item 13 c Remove shroud Item 7 by lifting up and moving sideways to clear the QDV on side fill models or by lifting straight up top fill models d To replace shroud assembly reverse above procedure Torque FCV Extension Item 25 onto FCV to 45 N m 4 in 1b RP3 Condensation Bottle Bracket RR a Remove condensate drain tube Item 58 from bottle Item 56 and remove bottle from bracket Item
29. k of the level meter s case ensuring the o ring seals evenly and without kinks to restore the air tight seal FIGURE 9 Shroud Assembly RP6 Liquid Level Meter Calibration Figure 10 WARNING You must first calibrate the empty side and then calibrate the full side Calibration is required to ensure accurate meter readings and should be done whenever an error in level readings is suspected or when the meter has been replaced If a calibration procedure is unsuccessful the calibration value will not be saved and an er ror code will be displayed on the LEDs See Table 7 To cali brate first enter calibration mode before performing either full or empty calibration NOTE In order to obtain an accurate calibration you must calibrate both empty and full capacitance For the full capaci tance part of the calibration you can choose either of the two procedures FIGURE 10 Liquid Level Meter pa N ZED8 LED 1 kl Calibrate Button Hidden Operate Button Enter Calibration Mode a Press and hold the hidden calibrate button While still hold ing continue to step B b Within 3 sec press and hold the operate button LED 1 and LED 8 will begin alternately flashing to signify that cali PN 10662679 Rev L bration mode has been entered If an error occurs the cali bration value will not be saved c Proceed to next step within 45 seconds Calibrate Empty Capacitance a Press and hold calibrate button
30. l equipment has been received inspected and restocked by CAIRE Inc Return of Unused Non Defective Merchandise CAIRE Inc at its discretion charges a 15 restocking fee for unused non defective merchandise that is returned An RMA number must be obtained from CAIRE Inc Customer Service prior to return of any goods Merchandise cannot be returned for credit after sixty 60 days Customer to pay all freight charges Tracking capability and insurance on all re turned goods is advised CAIRE Inc will not be responsible for misdirected shipments PN 10662679 Rev L 0 pi O Pa PN 10662679 Rev L 1 oy O pa N o lt 2 NO Q S NI gt A CAIRE Chart Industries Inc Caire Inc BioMedical Group 1800 Sandy Plains Industrial Parkway Suite 316 Marietta GA 30066 Ph 770 425 4470 e Toll Free 1 800 482 2473 Fax 770 425 4740 A Chart Industries Company lt gt www cairemedical com Chart BioMedical Ltd Unit 2 Maxdata Centre Downmill Road Bracknell Berks RG12 1QS United Kingdom Ph 44 0 1344 403100 Fax 44 0 1344 429224 Copyright 2008 Ref 10662649 Rev L
31. librate value telemetry meters PN 10662679 Rev L 2 Repair Procedures FIGURE 12 Manifold Capacitance Test Setup Ground ma Ug ae J 2 CONNECTS TO RED TERMINAL OF 29 CAPACITANCE METER 4 we O LU CONNECTS TO BLACK TERMINAL OF CAPACITANCE METER AS Wa Al KJ tt IHING gt ri o MSG NG y O NG SY 0 i NY le NOTE Make sure unit is empty and at room temperature before testing WARNING Before removing manifold assembly Liberator must be empty warm and vent valve open RP8 Manifold Capacitance Test Figure 12 a Capacitance Meter Set Up l Connect capacitance meter adapter to capacitance meter ac cording to Figure 12 Turn on capacitance meter and select 200 pF range Move zero adjustment on the front of the meter until the dis play reads zero PN 10662679 Rev L b Capacitance Test 1 Remove shroud assembly See RP2 2 Disconnect the wires leading from the manifold harness assembly to the level meter by disconnecting the JST con nector which 1s zip tied to the bracket 3 Connect JST connector on capacitance meter adapter to manifold harness assembly Item 29 4 Connect alligator clip to manifold bracket 5 Read manifold capacitance and compare to the acceptable ranges found in Table 10 If it does not meet specifications call Technical Support TABLE 10 Manifold Capacitance Specifications
32. ll with approximately 7kg 15 lbs of properly saturated LOX b Set FCV to maximum setting and run for one hour minimum c Check all flow settings according to Table 4 and verify pressure stays above 1 24 bar 18 psig Check Efficiency of Unit a Set FCV to zero and allow unit to warm up 10 15 min b Inspect unit for cold or sweaty condition and for exces sive venting from relief valve some venting is normal c If either condition is observed conduct NER test RP32 Prepare for Use a Empty contents RP23 b Allow unit to sit until warm 2 4 hours c Clean and or disinfect outside of unit following instruc tion set forth in the Operation section Section VIII Maintenance schedule B Continuous Schedule B Continuous These inspections tests should be done between patients A Introduction 1 Visually inspect for Continuous maintenance is a set of tests and inspections done pe a Broken shrouds flow control knobs riodically to ensure equipment is functioning properly It can be performed by drivers or other personnel while the equipment is b Cold sweaty bottle or excessive venting from relief valve in service vacuum problem Some venting from relief valve is nor mal 1 Ifaunit fails a given test it should be taken out of service and sent to the Repair Center Department for further inspection c QDV deformation 2 Schedule Checks should be made when the driver sees the d Inspect und
33. ntil both this manual and the Patient Operating Instruction booklet have been read and fully understood PN 10662679 Rev L Table of Contents NE a e e e ea ots n 1 ll TableofContents 3 Ill Equipment Description 4 IV Specifications agama KA AAA 5 We SOD mma a KUMANA el uss KA 6 VI TheoryofOperaton 7 Vil Unpacking and Setup 10 Mills Operation GN il ned a see Ph a wii 11 IX Routine Maintenance 13 X Troubleshooting Table of Contents 15 Troubleshooting Chart 16 Repair Procedures 18 Service Tools Equipment Supplies 31 Al Pans Prce LIST sauce sesimi ia 32 Ordering Information rm sale KA e i en ara NG 33 XII Restocking Policy 2522 20 20 ad e ik maas 34 P lt 1 ERK e NE ME Eat ee Gs 35 PN 10662679 Rev L Eguipment Description FIGURE 1 Liberator Components Shroud Portable Release Button Top Fill Fitting ODV Breathing Coil Vent Valve Liguid Level Meter Operate Button Liguid Level Meter Primary Relief Valve Economizer Regulator Warming Coil Flow Control Valve FCV Side Fill Fitting ODV Cryogenic Container Dewar Vacuum Insulation Inner Vessel Condensate Bottle IN 740 KN EE BEAN OR Na N ZEZE BEN P c7 NAN A E F Ni A oy A Ye For Top Fill or Dual Model
34. ody Item 15 g Replace shroud See RP2 FIGURE 20 Side Fill Twist Lock QDV Assembly RP21 Push on QDV Assembly RR Figure 21 WARNING Liberator must be empty and vented before starting this procedure a Remove shroud See RP2 b Remove pop off assembly See RP22 c Remove pop off sleeve Item 21 from QDV Item 11 d Remove the top fill ODV by turning the QDV nut Item D clockwise while holding the QDV Item 11 with a wrench e Pull the QDV straight up and off of the fill tube Item D Use rubber mallet to lightly knock upward if required If re placing entire QDV recommended skip to step h f Remove the static seal Item 67 and poppet retaining ring Item 66 while holding poppet Item 17 in place g Replace poppet retaining ring and static seal h Push QDV back on to fill tube Item D and torque nut to 60 67 N m 45 50 ft Ibs while holding valve body to fasten QDV in place 1 Place pop off sleeve over QDV j Reassemble pop off assembly to unit ensuring spring to pin engagement into pop off sleeve groove k Replace shroud See RP2 RP22 Push on Portable Pop Off Assembly RR Figure 21 a Remove shroud See RP2 b Remove two screws Item 37 and washers Item 38 from pop off assembly Item 27 and remove pop off assembly c Detach spring from bracket Item 39 and from pop off as sembly d Disassemble as necessary to replace pop off assembly parts e
35. olding the signal wire against gt 37 i di X A 0 FB a al DEERE LL Ve s MIRU WATT A Hii Jai the capacitance probe EH E 2 AN d Apply small amount of Stay Clean flux to tinned area of probe NG LA Item B using a cotton swab D g IM 31 D e Resolder feed thru wire Item A to tinned area of probe Item t By JA B Add small amount of lead free solid wire solder if neces D K gi w sary b NG D NO f Clean flux residue with distilled water and cotton swab Dry ig Li jap thoroughly 5 1 al g Replace manifold following listed procedure RP9 FIGURE 14 Feed thru Wire RP11 Manifold Harness Assembly RR Figure 13 a Remove manifold assembly See RP9 b Remove strain relief material holding signal wire against the capacitance probe c Unsolder feed thru wire Item A from probe Item B TH d Loosen feed thru nut Item C and remove harness A e To replace manifold harness reverse above procedure Tighten feed thru nut Item C 1 to 2 flats past finger tight Bg f Solder feed thru wire Item A following resolder procedure ENN 07 See RP10 Replace manifold assembly See RP9 RP12 Clean Dry Probe and Dewar Procedure 1 a Empty dewar per RP23 b Warm dewar per RP24 c If all moisture is not removed continue with Procedure 2 Procedure 2 a Remove manifold assembly See RP9 b Blow off probe assembly with
36. ollowing numbers to order a complete unit pas Side Fill Top Fill Dual Fill 13256435 13256654 13256195 a 13258449 13258641 kd 13259695 13259919 13259572 13262085 13262253 13261699 13263782 13263811 13263758 For European Part Numbers please call 44 0 1344 40310 For Asia Part Numbers please call 61 297 494333 Fill out a purchase order containing the following infor mation a Purchase order number b Name and address of billing location c Name and address of shipping location d Quantity part number description and unit cost for each item ordered Information 3 Telephone or fax CAIRE Inc at one of the numbers listed below to begin immediate processing of the order USA Toll Free Phone 800 48 CAIRE 800 482 2473 Toll Free Fax 888 WE CAIRE To place an order 888 932 2473 Phone 770257 1299 Fax 770 257 1300 Asia Australia Pacific Rim Phone 61 297 494333 Fax 888 932 2473 Europe Phone 44 0 1344 403100 Fax 44 0 1344 429224 Mail or fax the completed purchase order for confirmation to CAIRE Inc 1800 Sandy Plains Industrial Parkway Suite 316 Marietta GA 30066 CAIRE Inc Unit 2 Maxdata Cantre Downmill Rd Bracknell Berkshire RG12 1Qs United Kingdom All new equipment will be shipped either prepaid F O B Canton Georgia or collect via your specified carrier All replacement parts will be sent by UPS prepaid and th
37. on procedure requiring no additional tools and a range of error reporting codes which can be read directly from the LEDs to report calibration errors These can be found in the calibration procedure RP7 NOTE Tampering with meter battery housing will void the battery s 2 year warranty PN 10662679 Rev L FIGURE 6 Liquid Level Meter Circuit Level Meter Signal JST Connector Liquid Fill Tube Probe Inner Cylinder 4 Ground Unpacking and Setup Unpacking 1 Inspect carton for shipping damage Report any damage to freight company before signing bill of lading 2 Check description on carton against your order 3 Unpack unit including condensation bottle and bracket POI FCV extension and humidifier elbow kit 4 Set aside packing materials in case unit must be returned to the factory Setup 1 Install condensation bottle bracket by squeezing bracket ends together and inserting into slot in handling ring directly below FCV outlet 2 Install condensation bottle on bracket located below shroud A Remove cap from bottle Put condensation hose inside bot tle 3 Install FCV extension by screwing it into the side of the c Remove flow rate decal number disc Item 2 FCV to 45 N cm 4 in Ib d Remove locking pin Item 65 from its storage position on 4 Install humidifier elbow if applicable by screwing it into flow lock plate Item 3 and place in underside of hole cor t
38. ooting Chart 1 Empty Dewar Run 6 LPM zi ii 60 Minutes Records 4 Return Unit to Service Replace Lip Seal Replace Flowmete To use the Troubleshooting Chart e Start at the upper left corner e The top line shows the steps of routine maintenance e Unless otherwise noted by the arrows the flow through the chart is down or to the right PN 10662679 Rev L Repair Procedures RP1 General The following procedures have been carefully prepared to al low proper removal and replacement of defective components and should be used in conjunction with the Troubleshooting Chart and the tests in this section WARNING Make sure the unit is empty and vent valve is open before replacing any component except shroud assembly components or Lip Seals WARNING The technician s hands tools and clothing should be free of all oils and greases WARNING Parts that are welded in place must not be replaced in the field Should these parts fail return complete assembly or sub assembly to factory for repair DO NOT use solder or silver solder to repair broken welds WARNING The manufacturer of fluorolubricant warns users not to allow fluorolubricant to contaminate tobacco products Wash fluorolubricant from hands before smoking WARNING Do not use glue type thread locking compounds or unapproved sealants on any repairs CAUTION When replacing components make sure the new part
39. or top fill Liberators 4 Liberator vent valve wrench 4 Eye protection I Pressure Gauge I Insulated gloves b If refilling a partially filled Liberator verify flow rates are within tolerance specifications before filling c Verify that liquid level meter is operating properly The LED display should indicate approximate level in unit The low battery LED should not be lit NOTE If flow rates are out of specifications or liquid level me ter operates improperly refer to Troubleshooting section Section X d Connect transfer line to fill source Connect proper transfer line adapter to transfer line e Fully open liquid valve on fill source f Purge transfer line for a minimum of 5 seconds ensuring gas is safely piped away from operator PN 10662679 Rev L Operation 1 Connect transfer hose fill adapter to a securely mounted mating QDV OR 11 Push adapter poppet against the side of a Liberator unit or other unpainted stainless steel surface g Wipe reservoir fill connector with lint free rag if moist h Weigh unit as required by local and federal standards 1 Fully open Liberator vent valve j Connect transfer line to Liberator to begin fill k Connect a pressure gauge to oxygen outlet and open the flow control valve to 2 LPM or greater 1 While filling throttle the vent valve with the vent valve wrench as needed to keep pressure at approximately 1 4 bar 20 psi An alternate m
40. ot guarantee prop erly saturated LOX The filling source tank must have a mini mum 1 6 bar 23 psi to transfill into the Liberator or low satu ration will occur in the Liberator To minimize the effect of undersaturated liquid in the Liberator a fixed orifice has been installed in the outlet of the vent valve This orifice regulates the back pressure in the unit during the fill process resulting in improved saturation pressures in the Liberator Operation If the flow control valve and vent valve are closed with LOX in the unit then the pressure in the inner vessel will remain near the primary relief valve setting of 1 6 bar 23 psig In the Liberator as in all vacuum insulated cryogenic contain ers some liquid oxygen in this case is always evaporating into a gas The rate of generation of this gas with the flow control valve closed is called the normal evaporation rate NER This gas is lost through the primary relief valve FIGURE 4 Operation Above 1 4 Bar 20PSI gt Gas to Patient Ka gt os CA Breathing mm R Coils Me Economizer cH D gt Open E When the flow control valve is at any setting other than off and the economizer valve is open presure over 1 4 bar 20 psig see Figure 4 gaseous oxygen is forced from the head space in the inner vessel through the economizer valve to the breathing coil This process conserves or economizes liquid oxygen by withdrawing
41. ow These schedules allow the distributor maximum flexibility while assuring that equip ment is operating properly The healthcare distributor may follow either Schedule A or Schedule B or a combination of the two schedules Schedule A Biennial A Introduction Routine maintenance 1s a series of steps used to assure that equipment is functioning properly 1 If a unit fails a given test one of two things may be done a Refer to Troubleshooting section Section X of this manual OT b Return the unit to CAIRE Inc for repair 2 Schedule Maximum of two years between routine main tenance testing Unit should be tested whenever a problem is suspected B Procedure Follow the steps in order listed If the unit fails any step refer to Troubleshooting section Section X of this manual 1 Visual Inspection a Remove any LOX prior to maintenance RP23 b Look for damaged or missing parts c Verify the meter reads empty one LED the low bat tery LED is not lit and no error codes appear on the me ter 2 Component Test a Remove shroud RP2 b Pressurize to 1 7 bar 25 psig RP13 and check that PRV opens c Pressurize to 2 3 bar 34 psig RP13 and check that SRV opens d Recalibrate meter RP7 Test pressure retention RP15 f Replace shroud RP2 PN 10662679 Rev L TABLE 4 Flow Test Acceptable Ranges FCV Setting LPM OFF E e oo Flow Test a Fi
42. ow it to stabi lize before continuing b Press and hold operate button for 3 sec LED 8 will flash as the meter stores calibration value If successful LED 8 will flash again and calibration mode will exit If an error occurs the calibration value will not be saved Repair Procedures RP 7 G4 Meter Error Codes Figure 11 FIGURE 11 Calibration Errors The table below identifies the error codes that one is likely to Lae come across LED DON AN LED 8 A y D i A i in E IN Na ka TANN A MN V Fin ANL gt No Calibrate Button a ki 2 Hidden le gili Operate Button TABLE 8 Calibration Errors a am naam nw Empty capacitance less BAY gt than 100 PF When calibrating empty Empty capacitance A 6 7 High Cap ereater than 300 PF When calibrating empty 1 4 Span less than 30 PF When calibrating full 5 8 High Span Span greater than 80 PF When calibrating full The new full cap value 1s 1 3 5 7 Range less than empty cap When calibrating full value TABLE 9 Operation Errors eme ne e ww 246 Hich Ca Reading is 120 PF above Moisture Remove moisture and debris S P calibrated full value Debris on probe from probe and recalibrate Low Batt 2 4 6 Bad Cal a AHA New meter revision fixed Recalibrate out w o pressing green button Cap reading is 5 PF or greater Moisture in harness added with Completely dry harness 1531 Low Cap less than calibrated empty new meter rev on all assembly and reca
43. rating instructions are affixed to the side of the shroud 4 Liquid Level Meter This system uses a capacitance probe and an electronic LED readout to measure and display the LOX level by pressing the onboard operate button An optional roller base can be provided to help move the Liberator PN 10662679 Rev L LIBERATOR 20 Capacity kg lbs LOX 24 6 52 Liquid Liters 21 6 Gaseous Liters 17 780 Selectable Flow Rates Liters Per Minute LPM Flow Rate Accuracy Hours of Operation 2 LPM Standard Fill Connections Operating Pressure Economizer Regulator Bar PSIG LIBERATOR 30 34 0 75 31 2 25 650 Liberator 37 41 7 92 38 3 31 460 50 8 112 46 6 38 300 0 1 liter per minute or 10 of flow setting whichever is greater 148 Side Top 1 4 20 Primary Relief Valve Setting Bar PSIG 1 6 23 Secondary Relief Valve Setting Bar PSIG Normal Evaporation Rate kg lbs per day 2 1 30 0 68 1 5 Filling Time Fast Fill Technique Warm minutes Cold minutes Height cm in Diameter cm in Weight Empty kg lbs Full kg lbs Fill Connector Types 29 1 5 62 2 24 5 35 6 14 17 6 39 41 3 91 213 Side Top 1 4 20 1 6 23 2 1 30 0 68 1 5 3 0 2 0 74 9 29 5 35 6 14 20 4 45 54 4 120 Side Mounted Rotary Coupling Top Mounted Rotary Coupling Top Mounted Push Coupling 262 Side
44. re 16 Pany 35 WARNING Liberator must be empty and vented before starting procedure a Remove shroud See RP2 b Unscrew PRV Item 62 from the economizer regulator Item 35 To replace PRV Item 62 reverse above procedure Tighten the PRV approximately 10 20 degrees clockwise after the PRV body contacts the economizer regulator minimum of 230 350 N cm 20 30 in lbs 24 Secondary Figure 17 N d Pa ON NO fig si N M Pl b N N C 7 Remove shroud See RP2 Unscrew SRV Item 28 from FCV Item 24 To replace SRV Item 28 apply Teflon tape to the threads staying back one thread from the end of the RV d Tighten SRV to be leak free approximately one turn from fin ger tight PN 10662649 Rev L 23 Repair Procedures RP15 Pressure Retention Test Figure 18 WARNING Liberator must be empty and vented before starting procedure a Assemble pressure gauge Item A and adapter assembly Item B use PTFE tape b Connect gauge assembly to humidifier adapter Item 26 on FCV outlet Open FCV Item 24 to 6 LPM setting c Assemble oxygen regulator pneumatic hose Item C with DISS fittings and male pneumatic test adapter Item D Connect assembly to oxygen gas source d Connect male pneumatic test adapter Item D to Liberator QDV Item 15 e Increase pressure to 1 4 bar 20 psig f Disconnect male pneumatic test adapter Item D from QDV It
45. re proper settings on the replacement regulator d Reverse remainder of procedure to install new properly adjusted regulator RP29 Economizer Regulator Adjustment Figure 26 a Follow steps a and b of RP28 to remove economizer reg ulator WARNING Liberator must be empty and vented before starting this procedure b Connect the oxygen pressure source to the inlet of the econ omizer regulator Item 35 as shown in Figure 25 The in let is the side attached to the economizer tube Item D Figure 25 c Open the pressure source valve Adjust the pressure source regulator to 1 6 bar 23 psig The economizer regulator should be set to open at 1 48 bar 21 5 psig and close at 1 41 bar 20 5 psig d Slowly open valve Item B just enough to allow some gas to escape e Pressure gauge Item A will indicate the setting of the economizer regulator The setting is modulated by turning the threaded rod inside the locking nut Item C f Loosen the locking nut allowing the threaded rod to be turned g Turn the threaded rod using an allen wrench to modulate the economizer setting The economizer regulator should be set to open at 1 48 bar 21 5 psig and close at 1 41 bar 20 5 psig h Tighten lock nut to secure threaded rod into place 1 Reverse steps a and b of RP28 to reinstall regulator Repair Procedures RP30 Flow Control Valve RR Figure 27 WARNING Liberator must be empty and vented before
46. s Only The CAIRE Liberator is the stationary component of the Liberator Portable supplementary oxygen system The Liberator incorporates a stainless steel cryogenic container with the valves plumbing and associated hardware required to deliver gaseous oxygen to the patient at near ambient temperature The Liberator is comprised of four major assemblies grouped according to function l NI o Cryogenic Container This assembly is a double walled vacuum insulated dewar for storing liquid oxygen LOX at approximately 180 C 300 F The inner vessel is designed to safely hold liquid oxygen and is protected from over pressurization by the primary relief valve Vacuum insulation between the inner and outer vessel keeps outside heat from causing the cold liquid inside to evaporate Breathing Circuit This circuit consists of the manifold assembly fixed orifice rotary flow control valve FCV breathing coil and warming coil It withdraws liquid oxygen from the cryogenic container warms it to near ambient temperature and regulates the flow of oxygen gas to the patient Any water that condenses on the cold coils is routed into the condensate bottle An economizer regulator is utilized to conserve LOX by drawing oxygen head gas into the breathing circuit Shroud Assembly The shroud assembly houses and protects the breathing circuit and liquid level meter Labels listing safety information and patient ope
47. starting this procedure NOTE Special care should be taken in aligning the FCV in order to ensure that it lines up properly with the shroud Remove shroud See RP2 Loosen compression fitting nut Item 34 at connection of breathing coil Item 49 and FCV assembly Disconnect FCV assembly Item 24 from coll Remove the FCV knob Item 1 by grasping firmly and pulling upwards Unscrew the two screws Item 4 holding the lock plate Item 3 and decal Item 2 to the FCV Item 24 and re move lock plate and decal Unscrew SRV Item 28 from FCV Item 24 Replace the FCV Item 24 by reversing the above proce dure FIGURE 27 Flow Control Valve 1 N A j RP31 Dewar RR WARNING Liberator must be empty and vented before starting this procedure a b C Remove shroud See RP2 Remove manifold assembly and coils See RP9 Remove condensate bottle Item 56 drain tube Item 55 and bracket Item 54 following RP3 d Remove dewar cap from the new dewar and place the cap on old dewar e Clean dry both the probe and dewar following procedure in section VIII f Connect the manifold assembly with coils to the new de war be sure to follow the manifold assembly replacement procedure See RP9 Do not replace shroud g Replace condensate bottle Item 56 bracket Item 57 and drain tube Item 58 h Scribe part number and serial number on new dewar han dle Make part numb
48. sure undersaturated For example when a Liberator is filled from a liquid source sat urated at 6 9 bar 100 psig larger transfer losses will occur This is because the Liberator is designed to operate at 1 4 bar 20 psig and the liquid it is filled with is saturated at a much higher pressure and at its correspondingly higher temperature It is necessary for this liquid to reach equilibrium at a lower pressure and temperature before the relief valve will close and the Liberator will operate properly In order to become saturated at 1 4 bar 20 psig the liquid oxy gen must release enough heat for its temperature to be lowered to that temperature corresponding to a pressure of 1 4 bar 20 psig as shown in the graph The temperature is lowered through boiling All of the gas generated by this boiling is vented through the relief valve and or primary relief valve and is lost If the saturation pressure of the liquid oxygen in the filling ves sel is lower than the normal operating pressure of the Liberator oxygen vaporization within the dewar works to raise the system pressure to the required 1 4 bar 20 psig This may require as long as a day The time required for saturation to 1 4 bar 20 psig depends on the initial liquid saturation pressure Theory of Operation WARNING Low oxygen flow rates to the patient may result if the Liberator 1s filled with under saturated liquid oxygen WARNING The vent valve orifice does n
49. t FCV off vent closed a minimum of 48 hours after emptying b To warm a Liberator more quickly 1 Connect regulator Item C to oxygen or nitrogen gas source 2 Connect pneumatic hose Item D to regulator Item C and male pneumatic adapter Item F 3 Adjust regulator to 1 4 bar 20 psig Open vent valve Item 41 to allow slow venting 4 Allow Liberator to vent for 1 1 2 hours minimum after vent valve Item 41 defrosts PN 10662649 Rev L Repair Procedures RP25 Flow Rate Test Figure 24 FIGURE 24 Flow and Pressure Tests NOTE For flow rate test Liberator needs to be at least 1 4 to 1 2 full of properly saturated liguid oxygen NOTE Be careful to allow for accuracy tolerances of flow me ter Table 4 does not account for these tolerances a Connect FCV Item 24 outlet to flow meter Item G inlet with respiratory tubing Make sure flow meter outlet 1s open and unobstructed and flow meter Item G is properly posi tioned b Unit should operate for 1 1 2 hours minimum overnight is optimum Test flow rate at each FCV Item 24 position Record all flow rates c Flow rates must be nominal values within tolerances listed in Table 4 or unit fails flow rate test RP26 Operating Pressure Test Figure 24 NOTE If testing operating pressure because of improper flow rates test pressure immediately after flow rate test a Assemble pressure gauge Item H and adapter Item J use
50. ter or CAIRE If unit passes all tests clean outside of 8 38 3J413 50 2 544 59 2 644 69 4 75 7 87 1 05 3 the unit with household glass cleaner and lint free cloth be ing careful not to get cleaner inside valves as this could lead to malfunction 10810132 13510163 PN 10662679 Rev L Troubleshooting Repair Procedures Table of Contents A ila yaza iken 6 i ee veee ee ee tee E aet sian doh besa eee 15 B Tro bleshooting Charts a ka ilin li dl pied edad rinde tea 16 17 C Repair Procedures RPI E N e cue EE e eml KE GN ME er 18 RP Shroud Assembly RR aileme ka GA lik ba la NAN anakan Ka 18 RP3 Condensation BottleBrackeeRR 18 RP4 Ee Vel Mere S sana mele eme aaa 18 RP5 Liquid evel Meter Battery RR a lm mai Gali 19 RP6 Liquid Level Meter Calibration se erir ilin rada jakn a 19 RP7 G4 Meter Troubl eshool iNe selen Ba mede emma sel si 20 RP8 Manitold Capacitance Test ayara e imalini sala des 20 RP9 ManifoldAssembiyRR Z0 RP10 Resolder Feed thra Wire kam ill kale arm Buda ds 21 RP11 Manifold Harness AssembiyRR 21 RP12 Clean Dry Probe amp Dewar ae Sa anin Genre sre rise 21 RP13 Renner Valve AA EA in tar b ef 22 RP14 Relee Valve RR maana el e ANAL PAA ani sl 22 RP15 Pressure Retention DESE yea ski ama daki aa ni E ad 23 RP16 Pinong Leak TEOSE ess aaa nad aaa 25 RP17 Warming and Breathing Coil Assembly RR
51. the head gas first instead of allowing it to es cape through the relief valve While flowing through the breathing coil the cold gaseous oxy gen is warmed to near ambient temperature before being me tered and dispensed by the flow control valve Whenever gas is removed from the space above the liquid oxy gen head space the inner vessel internal pressure begins to drop slightly When the pressure drops to 1 4 bar 20 psig the economizer valve closes see Figure 5 forcing liquid oxygen up the withdrawal tube and through the warming coil where it becomes gas The gas then flows through the bypass tee to the breathing coil the flow control valve and then the patient As the pressure in the container increases over 1 4 bar 20 psig the economizer valve opens and the cycle repeats maintain ing constant oxygen flow at the selected flow rate to the pa tient FIGURE 5 Operation Below 1 4 Bar 20PSI ys i Gas to Patient J Breathing barang gt Coils poo Warming Economizer gt dip Coils Closed T Closed a TE AC PN 10662679 Rev L Theory of Operation Liquid Level Measurement Liberators are equipped with a unique liquid level measurement system This system measures the level of liquid oxygen inside the unit with a capacitance probe and displays that liquid level on the level meter s LEDs The liquid level probe consists of two concentric stainless steel cylinders extending inside t
52. up and over the top of the Liberator f To replace coil assembly reverse above procedure PN 10662679 Rev L Use wrench on hex end of tool Push in on tool while turn ing to engage tabs on tool with slots in retaining ring Item 87 Turn tool clockwise to loosen retaining ring Item 87 Remove the ring Remove lip seal Item 88 from QDV Item 15 Jeweler s screwdriver may be used if necessary but seating surfaces must not be damaged Apply thin film of fluorolubricant to new lip seal Item 88 Place retaining ring Item 87 and new lip seal Item 88 on tool Install retaining ring Item 87 in QDV body Item15 by turning tool counter clockwise while pushing in on tool Torque retaining ring Item 87 to 225 280 N cm 20 25 in Ibs Repair Procedure RP20 Twist Lock QDV Poppet Assembly RR Figure 20 WARNING Liberator must be empty and vented before starting procedure a Remove shroud See RP2 b Loosen nut Item C by holding ODV body Item 15 with a wrench and turning nut Item C clockwise c Disassemble QDV by pulling ODV body Item 15 off and then pulling the hex coupler Item 89 and O ring Item 16 out of the fill tube d Apply thin film of fluorolubricant to O ring Item 16 and replace entire poppet assembly Item 14 e Reassemble QDV matching alignment marks on valve body and fill tube f Torque nut Item C to 60 67 N m 45 50 ft lbs while holding valve b
Download Pdf Manuals
Related Search