Nuvo 8 Service Manual
Contents
1. TIMING BOARD Wd 1014 0530 VALVE 1 VALVE 1 VALVE 2 Y OIIVW3H9S 69 COOLING FAN 20024 A 3 115 Volt Electrical Schematic ES00010 with OCSI Page 36 of 52 2010 2229 Rev B Part Reference Call Out Number Number A 4 BASE ASSEMBLY 0100 0380 REV A 9251 1502 8300 8068 9251 1309 9251 1315 9251 1316 9251 1317 9251 1318 2010 2229 Rev B OONOADND a Qty Unit of Part Description Required Measure BASE MODIFIED FOR 8LPM UNIT CASTER ISODAMP BASE LF RT INSIDE FOAM BASE FAN REAR INSIDE WALL FOAM BASE RT WALL INSIDE FOAM BASE LF WALL INSIDE FOAM BASE L R OUTSIDE WALL 1 000 4 000 2 000 2 000 1 000 1 000 2 000 EA EA EA EA EA EA EA Page 37 of 52 5 MAIN STRUCTURE ASSEMBLY FRONT VIEW NOTE MAIN STRUCTURES ARE IDENTICAL EXCEPT FOR VOLTAGE SPECIFIC COMPONENTS Use Assembly 0140 0380 for the 115 volt unit Use Assembly 0140 0381 for the 230 volt unit Page 38 of 52 2010 2229 Rev B N A gt NEA ON S TRO 5 97 WM Ss AURA A 4 22 NPP 2 2 SEE ASSEMBLY 0200 21 Page 39 of 52 A 5 1 MAIN STRUCTURE ASSEMBLY REAR VIEW SPECIFIC COMPONENTS Use Assembly 0140 0381 for the 230 volt unit NOTE MAIN STRUCTURES ARE IDENTICAL EXCEPT FOR VOLTAGE Use Assembl2. Medical Products Inc Nuvo 8 Oxygen Concentrator Service Manual Nidek Medical Products Inc 3949 Valley East Industrial Drive Birmingham Alabama 35217 USA Telephone 205 856 7200 24 Hour Fax 205 856 0533 Table of Contents 2 4 General Safety Instructions Production and Use of Oxygen 5 Use and Maintenance of the Device 5 Standards and Regulations 5 6 Section 1 0 Introduction 1 1 Home Service Provider Responsibility 6 7 1 2 Important Notice and Symbol Explanations 7 1 3 Functional Specifications 8 Section 2 0 Operational Check and Concentration Test 2 1 Description of Operation 8 2 2 Operation Check 9 2 3 Alarm System 9 2 3 1 Battery Test 10 2 3 2 Power Failure Alarm test 10 2 4 Oxygen Concentration Test and Specification 10 11 Section 3 0 Patient Instructions 3 1 General Instructions 11 3 2 Routine Maintenance by the Patient 11 3 2 1 Cleaning the Cabinet Air Filter 11 3 2 2 Checking the Alarm System Battery 12 Section 4 0 Home Service Provider Maintenance 4 1 Routine Maintenance 12 411 Cabinet Air Filter 12 4 1 2 Final Product Filter Replacement 12 4 1 3 Inlet Air Filter Replacement 13 4 1 4 Battery Replacement 13 4 1 5 Recording Maintenance 13 4 2 Cleaning and Infection Control 13 14 4 2 1 Preparing for New Patient Use 14 Section 5 0 Service 5 1 Components 14 15 5 2 Cabinet Removal 15 5 2 1 Removing Cabinet Back 15 5 2 2 Removing Cabinet Front 15 5 2 3 Removing Control Panel 15 5
3. D T D CHEC VALVE RELIEF VALVE 2 QUTLET FLOW METER COMPRESSOR WX Y MODULAR ASSEMBLY J PNEUMATIC DIAGRAM NID NUVU 8 21 gl FENAN THE OF MEK AU REWA e STK DRAWN BY JB APPRV BY REF DWG SHEET 1 OF 1 CHEKD BY SCALE DATE 10 17 2008 CAD FILE PS00007 REV A FLOW DIAGRAM 8 A 1 Pneumatic Flow Chart PS00007 with OCSI 2010 2229 Rev B Page 34 of 52 u NMOHNH ua 3AvN NOLIV201 1310 107d XXX 791419713 ALS Qvov 6000053 20028 220VAC 4 HOT BR 95 CIRCUIT BREAKER HOT AUXILIARY CONTACTS BR POWER SWITCH BR OMS PC BOARD BR BLDK HOUR METER COMPRESSOR THERMAL DEVICE INSIDE CAPACITOR EI COOLING FAN SOLENOID VALVE 2 SOLENOID VALVE 1 COOLING FAN 9V BATTERY 0530 ddy OL 338 AB ava 2010 2229 Rev B A 2 230 Volt Electrical Schematic ES00009 with OCSI Page 35 of 52 110VAC NEUTRAL M qmi uu MOVId M 07104 CIRCUIT BREAKER AUXILIARY CONTACTS Mp 5 POWER SWITCH K 3AvN NOUY201 Eg 9V BATTERY HOUR METER COMPRESSOR THERMAL DEVICE INSIDE lt CAPACITOR E see COOLING FAN
4. Defective capacitor Defective compressor Defective circuit board Faulty electrical connection Replace circuit breaker Replace capacitor Replace compressor Replace circuit board Repair electrical connection Alarm does not sound Dead battery Incorrectly installed battery Faulty electrical connection Defective 0 ON OFF switch Defective buzzer Defective pressure sensor Replace battery Reinstall battery with correct polarity Repair electrical connection Replace 1 0 ON OFF switch Replace control board Replace and test control board Standard unit only Flow meter fluctuates Improperly set or faulty product regulator Leak Worn compressor Defective flow meter Kinked tubing Check regulator setting clean repair or replace regulator Test for leaks Replace compressor Replace flow meter Check tubing that connects the top of the sieve beds 2010 2229 Rev B Page 31 of 52 Problem Probable Cause Solution Cooling fan does not turn Defective cooling fan Defective electrical connections Replace cooling fan Check electrical connections Limited or low flow Restriction in humidifier or tubing Product regulator set too low Leak Weak compressor Air flow obstruction Replace humidifier or tubing Adjust regulator setting Leak test and repair leak Check system pressure and
5. 0 ON OFF switch to the ON position This should immediately activate the audible alarm If it doesn t refer to the troubleshooting chart in Section 6 0 of this manual 2 4 Oxygen Concentration Test and Specification To ensure that the output of oxygen from the device is within specification you must perform an oxygen concentration test Test the unit upon delivery to a patient and at periodic intervals Home Service Providers based on their expertise and documentation may establish and implement their own plans for checking oxygen concentration Consult Nidek Medical s Service and Maintenance Log A 12 for the recommended intervals for testing 1 If an oxygen humidifier bottle is used remove it from the oxygen outlet 2 Connect a calibrated oxygen concentration analyzer to the oxygen outlet 3 Set the 1 0 ON OFF power switch to the ON position It takes approximately five minutes for the oxygen concentration to stabilize Take oxygen concentration readings over a period of several minutes to reduce any cyclic variations 4 Verify that the product flow rate delivered by the unit matches the patient s prescription and does not exceed the capacity of the unit 5 Disconnect oxygen analyzer and reconnect humidifier bottle if used and any other equipment accessories that may be required 6 Adjust the flow meter adjustment knob to the prescribed flow rate NOTE Do not measure oxygen concentratio
6. 230V LOW NOISE CLAMP HOSE NYLON 67 78 ID 2010 2229 Rev B 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 000 1 000 3 000 4 000 4 000 1 000 4 000 3 000 3 000 3 000 1 000 1 000 1 000 1 000 1 000 1 000 1 000 e a m Qty Unit of Part Description Required Measure EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA 1 27 1 XP 17 e Pe m 4 AY 4 D xd 6 N NL gt 14 J n C U Ex P4 A 6 REGULATOR ASSEMBLY Part Reference Call Out Qty Unit of Number Number Part Description Required Measure 7854 6019 1 HOSE 1 4 OD X10 5 LG 1 000 EA 6814 9221 2 ELBOW 1 8 NPTF X 1 4 ODT 1 000 EA 8400 1060 3 REGULATOR 2 PORT 1 000 EA 7854 6054 4 HOSE 5 32 X 11 32 X10 LG SIL 1 000 EA 6491 1008 5 TEE NYLON 3 16 HOSE BARB 1 000 EA 7854 6052 6 HOSE 5 32 X11 32 X2 LG SILIC 1 000 EA 6956 9674 7 CHECK 1 4 HOSE 975 1 000 EA 2010 2229 Rev B Page 41 of 52 FOAM KIT SEE STRUCTURE ASSY 0140 0381 A 7 COMPRESSOR ASSEMBLY 2010 2229 Rev B Page 42 of 52 A 7 1 COMPRESSOR ASSEMBLY PARTS Part Reference Call Out Qty Unit of Number Number Part Description Required Measure 9250 1018 1 PLATE CO
7. ESD that can damage the board if not handled properly As when handling any ESD sensitive PCB observe standard ESD safety procedures These procedures include the following Handle the by the edges only Work on a grounded ESD mat Wear a grounded wrist strap Store PCB in anti static bags only Circuit Board Removal Note that the Circuit Board on the OCSI unit is different to the Circuit Board on the standard unit Set the 1 0 ON OFF switch to the 0 OFF position and unplug the power 1cord Remove the front and cabinet backs Remove the control panel to which the circuit board is attached Disconnect the 7 pin connector from the circuit board Disconnect tubing from each end of the black sensor tube on the OCSI unit noting their position and orientation Non OCSI units only Cut tie wrap and remove pressure sensor line Remove three screws that attach the board to the control panel Remove the circuit board NOTE Handle the new circuit board only by the edges to prevent electrostatic damage to the unit 5 7 2 Circuit Board Installation er 5 7 3 Locate the circuit board to line up the attachment points Install the three mounting screws Reinstall the tubing to each end of the black sensor tube as it was before Non OCSI unit only Reinstall the pressure sensor line and tie wrap Plug in the 7 pin connector Reinstall the control panel and the front and cab
8. by the sieve beds The pressure generated by the compressor forces oxygen to flow out of the top of the sieve columns The compressor is the likely cause of two potential specific problems a An insufficient amount of air is supplied to the process b An excessive sound level e Air Supply Compressor output refers to how much compressed air the compressor can produce This depends upon the model of the compressor length of stroke piston diameter speed of rotation and condition of seals The cup seals form the seal between the piston and the cylinder wall As the cup seals wear the output begins 2010 2229 Rev B Page 15 of 52 to gradually decrease This reduction in compressor output results in less air and thus less oxygen entering the sieve beds Therefore the production of oxygen decreases Because this drop in oxygen production occurs over a long period of time preventive maintenance on the compressor is not required You can continue a patient s therapy on the Nuvo 8 unit as long as the oxygen concentration level at the prescribed liter flow rate is within Nidek Medical s specification limits Refer to Section 2 4 Air Flow Meter O to 100 l min 1 bar Pressure Restrictor Filter e Sound Level The sound level is largely determined by the condition of the compressor s bearings There are four bearings located within the compressor that allow the inner components of the compressor to rotate
9. easily removed by hand Instruct the patient to clean this filter weekly Refer to Section 3 2 1 NOTE The filter may require more frequent cleaning if the Nuvo 8 unit operates in a harsh environment such as a house heated by wood kerosene or oil or one with excessive cooking cigarette smoke or atmospheric dust 4 1 2 Final Product Filter Replacement The final product filter does not require periodic replacement it needs to be replaced only if it restricts oxygen flow It is suggested that it be replaced whenever the sieve module is repaired or replaced and after the compressor is rebuilt 1 Set 1 0 ON OFF switch to the 0 OFF position and unplug the power cord 2 Remove the cabinet back to locate the final product filter NOTE Observe the flow direction of the filter before removal 3 Separate the silicone tubing from both sides of the filter 4 Install the new filter with the inlet side in the same position as before Push the tubing together so that it overlaps the barbs of the final product filter connections 5 Record information about the final product filter replacement in Appendix 12 of this manual and online at www nidekmedical com under the Maintenance Log tab 6 Reinstall the cabinet back Page 12 of 52 2010 2229 Rev B 4 1 3 Inlet Air Filter Replacement The inlet air filter requires inspection at each patient visit The filter should be replaced annually or more often depending on the en
10. the Nuvo 8 with a soapy water solution or commercial detergent cleaner to remove any debris organic or otherwise Be careful not to get any liquid into the interior of the unit Next clean the exterior with either a common chemical disinfectant or a bleach solution and allow it to air dry For the bleach solution wear eye and skin protection to prevent exposure to the chlorine Retest the Nuvo 8 before you return it to your inventory Replace the cabinet air filter between each patient s use or clean with warm soapy water if it is in good condition Clean this filter at least once per week or more frequently if operated in a dusty environment Make the bleach solution a 1 100 dilution of 5 25 sodium hypochlorite Mix one part household bleach e g Clorox with 99 parts cold tap water To measure the solution easily take 1 4 cup of household bleach and mix it with a gallon of cold tap water Allow the mixture to sit on potentially contaminated surfaces for 10 minutes 5 0 Service 5 1 Components The design of the Nidek Medical Nuvo 8 Oxygen Concentrator allows for easy access and removal of most components This allows you to perform scheduled maintenance repair and replacement of parts with minimal time and effort The inlet air filler and battery are conveniently located inside the small access panel in the cabinet back CAUTION For your safety be sure to set the 1 0 ON OFF switch to the 0 OFF position and unplug the powe
11. to determine the character of the environment in which the concentrator is to operate amaintenance schedule with intervals based on the environment in which the unit is operating functioning Standard Servicing Intervals are shown below Intervals used by the homecare service provider and or patient caregiver should be more frequent when conditions of usage dictate Nidek Medical Oxygen Concentrator Routine Service Intervals Check Percent Oxygen Cabinet Air Filter Concentration Inlet Air Filter Final Product Filter Capacitor OCSI Models Every 15 000 hours Wash the filter each week in a Inspect at each patient visit Replace Replace at each Replace at each or 3 years mild detergent annually or more compressor compressor Std Models Every solution often depending on service module service module 5 000 hours or 1 Dry before environment replacement replacement year reinstalling 2010 2229 Rev B Page 51 of 52 Please maintain a log of all maintenance activities performed on this unit Serial Number____Model Alarms Additional Information Work Done Filter Changes nour 102 Check Comments etc Inspection Prior to Putting Into Service In Service Checks Medical device regulations require users and service personnel to notify manufactu
12. you record all routine maintenance and repairs performed on the Nuvo 8 unit including hours and dates of service in Appendix 12 of this manual and online at www nidekmedical com under the Maintenance Log tab 4 2 Cleaning and Infection Control With the growing concern about possible cross infection from home oxygen equipment i e oxygen concentrators from one home care patient to another appropriate cautions should be exercised The organisms of most concern are M Tuberculosis HIV and Viral Hepatitis These are potentially pathogenic Tuberculosis can survive outside of the human body but its mode of transmission is by droplet nuclei When infected individuals cough they release droplet nuclei into 2010 2229 Rev B Page 13 of 52 the air and these carry the Tuberculosis organism Another person may breathe in these droplet nuclei but prolonged exposure to the infected person is usually necessary for infection to occur HIV and Viral Hepatitis are both viruses which are not living cells themselves but which can duplicate when in a living host cell Both of these organisms are usually passed on by person to person contact and both need to be in the human body to survive Once outside the body viruses can survive for only a short period of time 4 2 1 Preparing for New Patient Use When you remove the Nuvo 8 from a patient s home always dispose of the used nasal cannula and humidifier bottle Clean the exterior of
13. 2 4 Main Structure 15 5 2 5 Caster Replacement 15 Page 2 of 52 2010 2229 Rev B 5 3 Compressor 15 5 3 1 Compressor Replacement 15 16 5 3 2 Capacitor Replacement 17 5 4 Process Control Valve 17 5 5 Sieve Module Replacement 18 5 5 1 Sieve Module Removal 28 5 5 2 Sieve Module Installation 18 5 6 Cabinet Fan Replacement 19 5 7 Circuit Board Replacement 19 20 5 7 1 Circuit Board Removal 20 5 7 2 Circuit Board Installation 20 5 7 3 Timing Board Removal 20 5 7 4 Timing Board Installation 21 5 8 Product Regulator Check and Setting 21 5 8 1 Product regulator cleaning or rebuilding 21 5 9 Pressure Switch Replacement 22 5 10 Circuit Breaker Replacement 22 5 10 1 Circuit Breaker Removal 22 5 10 2 Circuit Breaker Installation 22 5 11 1 0 ON OFF Power Switch Replacement 22 5 11 1 1 0 ON OFF Power Switch Removal 22 5 11 2 1 0 ON OFF Power Switch Installation 23 5 12 Buzzer Replacement 23 5 13 Hour Meter Replacement 23 5 14 Flow Meter Replacement 23 5 14 1 Flow Meter Removal 23 5 14 2 Flow Meter Installation 23 5 15 Power Cord Replacement 23 24 Section 6 0 Troubleshooting 6 1 Air Pressure Test P1 24 25 6 1 1 High Air Pressure 26 6 1 2 Low Air Pressure 26 6 2 Product Pressure Test P2 26 27 6 2 1 High Product Pressure 27 6 2 2 Low Product Pressure 27 6 3 General Troubleshooting 27 29 6 4 Troubleshooting Chart 30 32 6 5 Tool Kit and Pressure Test Gauge 33 2010 2229 Rev B Page 3 of 52 Appe
14. ICAL EXCEPT FOR VOLTAGE SPECIFIC COMPONENTS Use Assembly 20300 0381 for the 115 volt unit Use Assembly 20300 0385 for the 230 volt unit 2010 2229 Rev B Page 45 of 52 A 8 1 CONTROL PANEL ASSEMBLY UNIT WITH OCSI Denotes 115V Components Part Reference Call Out Qty Unit of Number Number Part Description Required Measure 9250 1005 1 PANEL CONTROL 1 000 EA 9250 1080 2 BOARD OMS UNV 1 000 EA 9250 1380 2 BOARD OMS COMPASS 1 000 EA 9250 1045 3 SCREW PLASTITE 4X3 8 PAN HD 3 000 EA 9250 1041 4 HOSE 5 32 X 11 32 X5 LONG SIL 1 000 EA 7631 1053 5 FILTER BACTERIAL 1 000 EA 7854 6051 6 HOSE 5 32 11 32 X3 LG SILIC 1 000 EA 6956 9674 7 VALVE CHECK 1 4 HOSE MPC A975 1 000 EA 9250 1012 8 SWITCH POWER 115 VOLT 1 000 EA 9250 1013 8 SWITCH POWER 220 VOLT 1 000 EA 9250 1050 9 SCREW 10 32 X3 8 PAN HD PHIL 8 000 EA 9250 1040 10 O RING 5 010 X 125 THICK 2 000 EA 9250 1048 11 WASHER NYLON 44 IDX 75 X 062 1 000 EA 9251 1122 12 HUMIDIFIER FITTING DISS 1 000 EA 9251 1526 15 FLOWMETER 2 8 0 LPM 1 000 EA 8400 1018 16 BREAKER CIRCUIT 10 1 000 EA 8400 1019 16 BREAKER CIRCUIT 5 AMP 1 000 EA 9250 1021 19 HUMIDIFIER BLOCK 1 000 EA 7854 6052 20 HOSE 5 32 X11 32 X2 LG SILIC 1 000 EA 7854 6054 21 HOSE 5 32 X11 32 X10 LG SIL 1 000 EA 7854 6055 22 HOSE 5 32 X11 32 X7 LG SIL 2 000 EA Page 46 of 52 2010 2229 Rev B 9 FRONT CABINET ASSEMBLY 0500 0380 Rev A Part Reference Call Out Qty Unit of Number Number Part De
15. If the bearings wear to the point that they become loose and noisy the compressor becomes noticeably loud and needs servicing The life of a compressor is determined primarily by its operating temperature It is extremely important that the inlet cooling air filters are cleaned and replaced as required Page 16 of 52 2010 2229 Rev B 5 3 1 Compressor Replacement Remove Compressor Assembly To remove the compressor assembly for exchange follow the steps listed below 1 Set the unit s 1 0 ON OFF switch to the 0 OFF position and unplug the power cord 2 Remove the cabinet back and front 3 Disconnect the suction tube 4 Disconnect the two compressor power cable leads and the two leads to the capacitor at the inline connector 5 Remove the three screws that connect the compressor plate to the base of the unit lift and slide out the compressor assembly 6 Remove tie wrap from compressor plate wiring harness 7 Remove compressor from the plate by removing the four compressor bolts 8 Remove the intake and exhaust fittings Compressor Assembly Installation To install a new or rebuilt compressor assembly follow the steps listed below 1 Perform the compressor removal procedure in reverse order 2 Leak test all connections 5 3 2 Capacitor Replacement The capacitor helps the compressor to start and run more efficiently If the compressor cannot start the capacitor may be defective and require replacement The capacit
16. MPRESSOR 1 000 EA 9250 1023 2 FAN 115V LOW NOISE 1 000 EA 9250 1024 2 FAN 230V LOW NOISE 1 000 EA 9250 1515 3 COMPR 115 60 NEXUS 8 LPM 1 000 EA 9251 1532 3 COMPR 230 50 NEXUS 8 LPM 1 000 EA 9251 1052 4 FITTING PLASTIC1 4 MNPT3 8 TUB 1 000 EA 6191 5003 6 ELBOW NYL 1 4 NPT X 1 2 HOSE 1 000 EA 9250 1016 7 SPRING COMPRESSOR VIBRATION 4 000 EA 9250 1105 8 BOLT 1 4 X20X2 LGGRADE 2 4 000 EA 9250 1111 9 SLEEVE 3 8 O D X 1 45 LG 4 000 EA 9250 1112 10 CAP COMPRESSOR SPRING TOP 4 000 EA 9250 1109 12 WASHER FLAT 25 ID X 1 25 OD 4 000 EA 9250 1110 13 WASHER LOCK 1 4 ID 4 000 EA 9250 1058 15 BOLT 1 4 20X 5 LG GRADE2 3 000 EA 9250 1020 16 WASHER FLAT 1 4 3 000 EA 9250 1163 18 FITTING 3 8 TUBE ELBOW 1 000 EA 9030 6008 21 TIE WRAP 4 5 OVERALL 1 000 EA 8400 1028 22 HOSE COMPRESSOR INLET 1 000 EA 9251 1531 23 TUBING 3 8 OD X 8 LG 2 000 EA 9251 1517 24 SPACER SPRING 4 000 EA 5161 1017 25 TERMINAL FEMALE INSULATED 2 000 EA 9250 1322 26 CAPACITOR 15UF W STUD MOUNT 1 000 EA 9251 1541 27 FITTING STRAIGHT3 8 Q D 1 000 EA 2010 2229 Rev B Page 43 of 52 8 CONTROL PANEL ASSEMBLY UNIT WITH OCSI FRONT VIEW NOTE CONTROL PANELS ARE IDENTICAL EXCEPT FOR VOLTAGE SPECIFIC COMPONENTS Use Assembly 0300 0380 for the 115 volt unit Use Assembly 0300 0385 for the 230 volt unit Page 44 of 52 2010 2229 Rev B 23 17 A 8 1 CONTROL PANEL ASSEMBLY UNIT WITH OCSI REAR VIEW NOTE CONTROL PANELS ARE IDENT
17. Units Equipped with Oxygen Concentration Status Indicator OCSI The OCSI green light remains off until the oxygen concentration reaches 8596 60 Hz and 8396 50 Hz approximately two minutes 3 Turn the flow meter adjustment knob counterclockwise until it stops wide open The flow meter should register in excess of 8 5 liters min If not refer to Section 5 8 to adjust the product regulator 4 Perform an oxygen concentration test as described in Section 2 4 2 3 Alarm System The Nuvo 8 Oxygen Concentrator is equipped with an alarm system which sounds a continuous and loud alarm when a power failure occurs or when one or more cycle variables are not within specification It sounds an alarm if the high or low pressure indicators are activated standard models only or if the optional OCSI detects lower than predetermined levels of oxygen concentration The alarm remains on until you correct the alarm condition or you set the 1 0 ON OFF switch to the 0 OFF position Refer to Section 6 0 for a list of probable alarm causes 2010 2229 Rev B Page 9 of 52 2 3 1 Battery Test If equipped the Nuvo 8 battery should be checked by observing that the continuous alarm sounds when the 1 0 ON OFF switch is moved to the ON position when the unit is unplugged from the wall outlet 2 3 2 Power Failure Alarm Test To test the power failure alarm perform the following actions Unplug the power cord from the wall outlet and set the 1
18. VE ASSY REXROTH PLATE TOP CROWNED PLATE BOTTOM CROWNED GASKET SCREW 8 32 X1 5 LG TUBE SIEVE EXTRUDED 16 LG TUBE SIEVE EXTRUDED 16 LG SCREW 10 24 1 25 TYPE F MUFFLER FELT NEW PISTON VALVE CHECK INSERT ORIFICE 2 5MM 475LOMN SPRING FILTER 2700 POLY 25MICRON KEEPER 2 WALDES SIEVE ZEOX OXY2 FILTER 2 0D 304SS MESH LABEL SIEVE BED BAR CODE LABEL WARNING DECAL PLUG 1 4 ODT PUSH IN FOAM EXHAUST MUFFLER FOAM EXHAUST MUFFLER TEE MALE BRANCH 1 8 NPTM 1 SCREW 10 24 1 25 TYPE F SCREW 10 32x1 5 LG TORX REDUCER INSERT 5 16 1 4 EL PLUG 1 4 ODT PUSH IN TUBING 3 8 x10 LG BRACKET SIEVE BED FILTER 2 5 OD POLY 25MICRON 1 000 1 000 1 000 2 000 4 000 1 000 1 000 8 000 1 000 2 000 2 000 1 000 2 000 4 000 4 000 1 240 4 000 1 000 2 000 1 000 1 000 1 000 1 000 16 000 16 000 1 000 1 000 1 000 1 000 2 000 2010 2229 Rev B EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA EA Nidek Medical Oxygen Concentrator Service and Maintenance Log Model Number Initial Inspection 1 Upon receipt check the unit for shipping damage Notify shipping company if damaged 2 Verify that cabinet air filter and the inlet air filter are in place 3 Plug the unit into an electrical outlet turn the unit and check the audible visual alarms 4 Set the flow meter flow control at the maximum recommended flow rate and all
19. and unplug the power cord 2 Remove the cabinet back 3 Slide the power cord strain relief reinforcement upwards to remove it from the mounting location at the rear of the base 4 Disconnect the power cord leads from the terminal quick connects 2010 2229 Rev B Page 23 of 52 5 Connect the leads on the new power cord at the terminal quick connects 6 Reinstall the power cord strain relief into the base of the unit 7 Reconnect the cabinet back 6 0 Troubleshooting 6 1 Air Pressure Test P1 Testing the operating pressure is a useful diagnostic tool when a concentrator has low purity and requires servicing Units functioning normally do not require operating tests Use the following procedure to test the operating pressure of the unit 1 Set the 1 0 ON OFF switch to the 0 OFF position and unplug the power cord 2 Remove the cabinet rear 3 Remove the air supply tubing going to the control valve and install the test port T fitting Figure 6 1 1 shows the normal operating configuration for the unit Figure 6 1 2 shows the installation of the test ports 4 Connect the pressure test gauge to the test port 5 Plug in the power cord and set 1 0 ON OFF power switch to the ON position Set the flow meter to 8 l min and allow the unit to run at least five minutes 6 Observe the maximum and minimum readings on the pressure test gauge Y The maximum reading should not exceed 40 psig 275 kPa The minimum readin
20. be kept available at all times This gauge connects to the pressure test ports on top of the air tank and on top of the sieve bed Drawings Pneumatic Flow Chart A 1 Electrical Diagram 230 Volt A 2 Electrical Diagram 115 Volt A 3 Exploded Drawings Base Assembly A 4 Main Structure Assembly front 5 Main Structure Assembly rear 5 1 Pressure Regulator Assembly 6 Compressor Assembly A 7 Control Panel Assembly front A 8 Control Panel Assembly rear 8 1 Front Cabinet Assembly A 9 Rear Cabinet Assembly A 10 Sieve Module A 11 Maintenance Log A 12 Refer to Thomas Compressor Manual FSM 0159 Rev A dtd 07 04 for compressor rebuild procedures Call Nidek Medical customer service to obtain a pdf file copy 2010 2229 Rev B Page 33 of 52 REV DESCRIPTION BY REF 10 APP DATE INITIAL ISSUE JB 10 17 2008 3 t AIR INTAKE CONTROL VALVE CABINET FILTER f PRESSURE CHECK REGULATOR VALVE ICSI INLET 995 8 ORIFICE N BOARD FILTER 900 90 NE E lt HEAT ce EXCHANGER P TEE B 5 ns PRODUCT 5 d s M B T QHD cn
21. centration 2 8 liters per minute at 90 6 5 3 Response Time Acceptable concentration is normally achieved in about 90 seconds allow 5 minutes to attain full concentration Positioning Operate the unit in an upright position maintaining at least six inches of open space on all sides for ventilation 2 0 Operational Check and Concentration Test 21 Description of Operation Air enters the Nuvo 8 Oxygen Concentrator through an external cooling air intake filter This filtered air enters the compressor via a suction resonator and fine filter which quiets the suction sounds made by the compressor Pressurized air then exits the compressor and passes through a heat exchanger which reduces the temperature of the compressed air Next an electronic valve system directs the air into one of two sieve beds that contain molecular sieve The special characteristic property of molecular sieve is that it physically attracts adsorbs nitrogen when air passes through this material thus enabling the production of high purity oxygen There are two sieve beds or adsorbent columns while one produces high purity oxygen the other is purged of the nitrogen it adsorbed collected while it was producing oxygen Each column produces oxygen for approximately 5 5 seconds and delivers it to the product storage volume in the end of the column Oxygen exits the adsorbent column through a pressure regulator flow control valve flow meter and final product fi
22. e wrap 5 Remove the circuit board and replace with a new one 6 7 Test the alarm system as described in Section 2 3 Reinstall the control panel and the front and back cabinets 5 10 Circuit Breaker Replacement 5 10 1 Circuit Breaker Removal 1 Set the 1 0 ON OFF switch to the 0 OFF position and unplug the power cord 2 Remove the cabinet front and back 3 Disconnect the circuit breaker leads 4 Unscrew the circuit breaker retaining ring front of control panel while holding the circuit breaker body in place 5 Remove the circuit breaker from the control panel 5 10 2 Circuit Breaker Installation Follow the removal procedure for the circuit breaker in reverse order to install the new circuit breaker 5 11 1 0 ON OFF Power Switch Replacement 5 111 1 0 ON OFF Power Switch Removal 1 Set the 0 ON OFF switch to the 0 OFF position and unplug the power cord 2 Remove the cabinet front and back 3 Unscrew the eight Phillips head screws that hold the control panel to the main structure 4 Disconnect the 1 0 ON OFF switch leads from the back of the switch being careful to note the color and position of each specific wire 5 Push on the back of the power switch while holding in its four retaining tabs and remove the switch through the front of the control panel 5 11 2 1 0 ON OFF Power Switch Installation Page 22 of 52 2010 2229 Rev B Follow the removal procedure for the 1 0 ON OFF p
23. ectrical shock hazard with the Power ON Be careful that no water contacts any of the electrical connections or components NOTE Small leaks can affect a concentrators performance and can cause contamination of the sieve Careful leak testing is important 5 6 Cabinet Fan Replacement The cabinet fan for the Nuvo 8 is located under the compressor Refer to the troubleshooting chart in Section 6 0 of this manual for instances where replacement of the fan may be required To replace the cabinet fan in the Nuvo 8 unit take the following steps 1 Set the unit s 1 0 ON OFF switch to the 0 OFF position and unplug the power cord Remove the front and back cabinets Follow the procedure in 5 3 1 to remove the compressor assembly Disconnect the fan leads Position the new cabinet fan so that the air flow arrow points toward the bottom and the electrical connections Be sure that the electrical wires do not interfere with the rotation of the fan Connect the fan leads and place the fan on the mounting pins Replace compressor assembly Reinstall the front and back cabinets Ord QIN 57 Circuit Board Replacement The printed circuit board controls the alarm system functions Consult the troubleshooting chart in Section 6 0 to determine when to replace the printed circuit board 2010 2229 Rev B Page 19 of 52 CAUTION The Printed Circuit Board PCB contains components that are sensitive to electrostatic discharge
24. er Replace Check for Leaks i 4 2 the Check Control Compressor b i Normal Air amp N Pressure J 75 _ Oxygen Pressure NE p Low Pressure Pressure 4 NL X Replae 2 Foams Check the Replace Control Sieve Valve Module Uo Normal Pressure e a Y Check for leaks at the regulator outlet product tubing oxygen outlet 2010 2229 Rev B Page 29 of 52 6 4 Troubleshooting Chart Problem Probable Cause Solution Compressor does not run Constant audible alarm with 0 ON OFF power switch in ON position No power to unit Unit circuit breaker tripped or faulty Faulty electrical connections Defective circuit board Defective 1 0 ON OFF power switch Check wall outlet for power Reset or replace circuit breaker Check electrical connections Check power switch Replace 1 0 ON OFF power switch Compressor runs with intermittent alarm Concentration at 8 L MIN is within specifications Defective high low pressure switch Kinked tubing Replace and retest pressure switch if a standard board is installed Compressor shuts down intermittently Restricted air flow through unit Unit overheating due to improper location Defective cooling fan Clean in
25. eristics of the appliance indicated on the manufacturers plate on the rear of the appliance Do not use an extension cord or multiple sockets which can create sparks and therefore pose a fire risk Use of the Nuvo 8 must be restricted solely to oxygen therapy on medical prescription in compliance with the daily rate and duration Use in other circumstances may represent a hazard to patient health Do not use in a specifically magnetic environment MRI etc The Nuvo 8 has an audible alarm intended to warn the user of any problems The user must determine the maximum distance away from the Nuvo 8 based on the sound levels in the environment to ensure that the alarm is always audible Standards amp Regulations In compliance with UL60601 1 EN60601 1 para 6 82 b The manufacturer assembler installer or importer are not considered to be responsible for consequences or the safety reliability and characteristics of a device unless the assembly extensions adjustments modifications or repairs have been performed by persons authorized by the manufacturer 2010 2229 Rev B Page 5 of 52 the electrical installation of the corresponding premises complies with appropriate regulations and codes the device is used in accordance with the instructions for its use If the replacement parts used for periodic servicing by an approved technician do not comply with the manufacturer s specifications the manufacturer i
26. essive cigarette smoke 1 Remove the dirty cabinet air filter from the back of the Nuvo 8 unit 2 Wash the dirty filter in warm water with household detergent and rinse Use a soft absorbent towel to remove excess water Reinstall the clean cabinet air filter on the grille in the back of the unit 3 2 2 Checking the Alarm System Battery See Procedure described in Paragraph 2 3 1 2010 2229 Rev B Page 11 of 52 4 0 Service Provider Maintenance 4 1 Routine Maintenance The Nuvo 8 unit has two filters and a 9 volt battery if equipped that require scheduled maintenance and replacement To ensure that the output of oxygen from the unit is within specification you must perform an oxygen concentration test Test the unit upon delivery to a patient and at periodic intervals Home Service Providers based on their expertise and documentation may establish and implement their own practices for checking oxygen concentration The interval established may be longer or shorter than 90 days which is the default time period recommended for providers who do not choose to establish their method Nidek Medical does not require preventive maintenance on the concentrator You do not need to perform any maintenance as long as the Nuvo 8 unit remains within specifications at the prescribed flow rate Refer to Section 2 4 4 1 1 Cabinet Air Filter The external cabinet air filter is located on the back of the unit it is
27. g should not be less than 13 psig 90 kPa NOTE When you turn the unit on it will take several minutes to reach normal operating pressures Page 24 of 52 2010 2229 Rev B OUTLET TO REGULATOR amp INLET FROM Ce Rexroth _ 7 MNR 8434000928 spome lt lt a 0130046 a ww E 2 gt die gt San Fig 6 1 1 DR TEST PORT l TO REGULATOR TEST PORT 9414000828 01038 9 INLET FROM COMPRESSOR Fig 6 1 2 2010 2229 Rev B Page 25 of 52 611 High Operating Air Pressure P1 Higher than normal operating pressure may indicate any of the following A restrictive exhaust muffler which does not allow the waste purge gas to exit the system freely Contaminated sieve beds Change the sieve beds 6 1 2 Low Operating Air Pressure P1 Lower than normal operating pressure may indicate any of the following A restriction in the suction resonator air intake filter this limits the amount of room air available to the compressor Disconnect the suction tube at the compressor and allow the unit to operate without the suction resonator to see if normal operating pressure returns An improperly operating control valve Confirm that the control does not have a leak A leak in the unit which allows system pressure to escape Leak test the u
28. inet backs Timing Board Removal Set the 1 0 ON OFF switch to the 0 OFF position and unplug the power cord Remove the cabinet back Disconnect the 6 and the 4 pin connectors as well as the 6 spade connectors from the Timing Board Remove the mounting screws Remove the circuit board Page 20 of 52 2010 2229 Rev B Handle the new circuit board only by the edges to prevent electrostatic damage to the unit 5 7 4 To reinstall the timing board reverse the removal procedure 5 8 Product Regulator Check and Setting The product regulator enables you to set the maximum flow of oxygen output by the Nuvo 8 unit To check for proper adjustment of the product regulator take the following steps Set the 0 ON OFF switch to the ON position Allow the unit to run for a few minutes Remove the front and cabinet backs Connect a pressure gauge directly to the patient outlet The pressure should read 17 10 psig 117 10 kPa Adjust the regulator if necessary Turn the knob clockwise to increase the output pressure requires a 5 32 hex wrench 7 Reinstall the cabinet front and cabinet backs 5 8 1 Product Regulator Cleaning or Rebuilding Clean or rebuild the product regulator if the flow meter ball fluctuates more than 1 4 of a liter or if the regulator cannot be adjusted l Set the 1 0 ON OFF switch to the 0 OFF position and unplug the power cord 2 Remove the front and
29. let filter or remove obstruction Locate unit away from heating source providing adequate ventilation on all sides Replace fan Compressor does not start 0 ON OFF power switch in ON position intermittent alarm and cabinet fan turns Extreme cold start Compressor thermally cut off due to excessive heat NOTE It will not restart unit it cools down Defective capacitor Faulty electrical connection for compressor Allow unit to reach room temperature Blocked air intake or defective cooling fan Clear obstruction or replace cooling fan Replace capacitor Check electrical connections for compressor Compressor runs with intermittent low pressure alarm and low oxygen concentration Leak Leak test and repair leak Page 30 of 52 2010 2229 Rev B Problem Probable Cause Solution Compressor runs with intermittent high pressure alarm and low oxygen concentration Defective sieve module Restriction in exhaust muffler Defective valve Replace sieve module Replace or clean muffler foam Replace sieve module Compressor relief valve releases popping sound Defective control valve Contaminated sieve module Defective relief valve Replace control valve Replace sieve module Replace relief valve Constant alarm with 1 0 ON OFF switch in ON position Circuit breaker repeatedly trips Defective circuit breaker
30. lter The flow control valve which is part of the flow meter controls the flow rate of oxygen delivered to the patient The Nuvo 8 unit delivers up to 9596 oxygen concentration at flow rates from 2 to 8 l min The remaining constituents of the product gas stream are nitrogen and argon both of which are part of the air we breathe are inert and are completely safe Page 8 of 52 2010 2229 Rev B 2 2 X Operational Check Nidek Medical runs each device through a burn in period and tests every Nuvo 8 Oxygen Concentrator thoroughly after manufacture before releasing for shipment As the home service provider it is your responsibility to perform the following test to ensure that no damage occurred in shipping or handling 1 Open and inspect all concentrator cartons upon receipt Unpack each unit and remove it from its carton Inspect the unit itself for damage the exterior of the carton is damaged or the unit itself is damaged note it on the freight bill signed by the driver e Before plugging the unit into the wall outlet actuate the 1 0 ON OFF switch to the ON position and note that the audible alarm sounds continuously See Section 2 3 Move the switch to the 0 OFF position 2 Plug in the power cord of the unit and set the 1 0 ON OFF switch to the ON position Check to see that the following occurs e The compressor runs listen for the sound e Exhaust air flows out of the bottom of the unit OPTIONAL for
31. m air available to the compressor Disconnect the suction tube at the compressor and allow the unit to operate without the suction resonator to see if normal operating pressure returns An improperly operating control valve Confirm that the control does not have a leak A leak in the unit which allows system pressure to escape Leak test the unit A compressor with reduced output Ensure that the concentration level at the desired liter flow is within specifications listed in Section 2 4 If it is below specification replace or repair the compressor 6 2 2 High Product Pressure P2 Higher than normal operating pressure may indicate any of the following A restrictive exhaust muffler which does not allow the waste purge gas to exit the system freely Check exhaust muffler for any restrictions Contaminated sieve beds Change the sieve beds 6 3 General Troubleshooting Before reviewing the troubleshooting chart the following steps may be useful to isolate any malfunctions 1 Turn the concentrator on If unit does not turn on refer to troubleshooting chart 2 Make sure all filters are clean 3 Turn flow meter completely open up to the highest setting The ball should rest at the top of the scale If setting is not greater than 8 5 l min adjust regulator so that the ball level exceeds 8 5 l min with the flow meter completely open 4 Connect test pressure gauge to the outlet fitting of the
32. molecular sieve to the moisture in room air results in contamination and permanent damage to the sieve material Keep all openings to the sieve beds sealed during periods of storage NOTE If replacement is necessary you must replace the entire module at the same time It is recommended to replace the sieve bed and control valve module as a complete assembly 5 5 1 Sieve Bed Module Removal 1 Set the unit s 1 0 ON OFF switch to the 0 OFF position and unplug the power cord Remove the cabinet back Disconnect the 3 8 inch air inlet tube from the side of the valve body Disconnect the 1 4 inch product outlet tube from the top of valve Disconnect the electrical wiring from each solenoid valve noting there color and position Remove the tie wrap 24 from around module Remove Z bracket from the top of the module Lift the module up and out of the base plate 18 0152 2010 2229 Rev B 5 5 2 Sieve Bed Module Installation To install the sieve beds follow the sieve bed module removal procedure in reverse order It is very important to properly connect all tubes to eliminate leaks To check for leaks take the following steps 1 Plug in the unit 2 Set the unit s 1 0 ON OFF switch to ON for three minutes with the flow meter closed to pressurize the system 3 Apply soapy water around all of the hose connections at the valve and check for leaks CAUTION There is an el
33. n of damage external or internal on the delivery receipt and report it directly to both the freight company and Nidek Medical Products Inc immediately e Check the operation of each Nuvo 8 before delivery to a patient Always operate the unit for a reasonable length of time and check that the oxygen concentration level is within specifications as referred to in Section 2 4 Test the battery and power disconnect alarm as described in Section 2 3 of this manual e Deliver Nuvo 8 units only to patients authorized by a physician s prescription The Nuvo 8 must not be used as a life supporting or life sustaining device A backup supply of oxygen must be available Page 6 of 52 2010 2229 Rev B e Instruct patients how to use the 8 in conjunction with the Patient Manual e Instruct patients to notify their physicians and or Home Service Providers if they experience any signs of discomfort e Instruct each patient how to perform routine maintenance of the cabinet air filter and how to check the alarm system battery if equipped Refer to Section 3 2 Be available to service each patient at any time Maintain the Nuvo 8 in accordance with Section 4 0 Repair components and replace parts only as outlined in this manual Use only Nidek Medical parts for replacement in Nuvo 8 Oxygen Concentrators e Refer to the Nuvo 8 Product Warranty if parts replacement is required within the warranty period 1 2 Important Notice and Symbol Ex
34. n output after the product stream passes through a humidifier bottle erroneous readings will result and your oxygen concentration measuring device might be damaged Page 10 of 52 2010 2229 Rev B Nidek Medical Nuvo 8 Concentration Specifications Liter Flow Specification Within Specification 2 to 8 l min 90 6 5 3 8796 or higher 3 0 Patient Instructions 3 1 General Instructions It is important that patients thoroughly understand how to operate the Nidek Medical Nuvo 8 unit This enables proper treatment as prescribed by a qualified licensed physician You must explain that the purpose of this therapy is to alleviate symptoms If patients experience any discomfort or the unit alarms they must notify their Home Service Provider and or physician immediately You as the Home Service Provider are responsible to see that each patient receives the Patient Manual Explain each step in the operation of the unit to the patient in reference to this manual 3 2 Routine Maintenance by the Patient To ensure accurate output and efficient operation of the unit the patient must perform two simple routine maintenance tasks e Clean the cabinet air filter Check the alarm system 3 2 1 Cleaning the Cabinet Air Filter NOTE The patient must clean this filter weekly as described below The filter may require daily cleaning if the Nuvo 8 unit operates in a harsh environment such as a house heated by wood kerosene or oil or one with exc
35. ndices Exploded Drawings A 1 A 3 A 4 A 5 A 5 1 A 6 A 7 A 7 1 A 8 1 A 9 A 10 A 11 A 12 Pneumatic Flow Chart Electrical Schematic 230 Volt Unit Electrical Schematic 115 Volt Unit Base Assembly Main Structure Assembly Front View Main Structure Assembly Rear View Regulator Assembly Compressor Assembly 115 Volt Unit Compressor Assembly 230 Volt Unit Control Panel Assembly Front View Control Panel Assembly Rear View Front Cabinet Assembly Rear Cabinet Assembly Module Assembly Maintenance Log Page 4 of 52 2010 2229 Rev B General Safety Instructions Production and use of oxygen Oxygen is not a flammable gas but accelerates the combustion of materials To prevent fire risks the Nuvo 8 should be kept away from flames incandescent sources or sources of heat cigarettes and combustible products such as oil grease solvents aerosols etc Do not use in an explosive atmosphere Prevent oxygen from accumulating on upholstered seats or any other fabric If the concentrator operates without being administered to a patient locate it so that the flow of gas generated is dissipated into the air Locate the equipment in a free space filter to the rear and below which is well ventilated and free of fumes or atmospheric pollution Use and Maintenance of the Device Use the electric cable provided and check that the voltage of the mains socket used complies with the electrical charact
36. nit A compressor with reduced output Ensure that the concentration level at the desired liter flow is within specifications listed in section 2 4 If it is below specifications replace or repair the compressor 6 2 Product Pressure Test P2 Testing the product pressure is a useful diagnostic tool when a concentrator has low purity and requires servicing Units functioning normally do not require operating tests Use the following procedure to test the product pressure of the unit 1 Set the 1 0 ON OFF switch to the 0 OFF position and unplug the power cord 2 Remove the cabinet rear 3 Remove the plug from the T fitting atop the valve and install the test port tubing 1 4 OD tubing is required Figure 6 1 1 shows the normal operating configuration for each unit Figure 6 1 2 shows the installation of the test port tubing 4 Connect a pressure test gauge to the P2 test port tubing 5 Plug in the power cord and set the 1 0 ON OFF power switch to the ON position Set the flow meter to 8 l min and allow the unit to run at least five minutes Page 26 of 52 2010 2229 Rev B 6 Observe the maximum and minimum readings on the pressure test gauge The maximum reading should not exceed 40 psig 275kPa The minimum reading should not be less than 13 psig 90 kPa 6 2 1 Low Product Pressure P2 Lower than normal operating pressure may indicate any of the following An inlet air filter that limits the amount of roo
37. or should be replaced at each compressor service module replacement To replace the capacitor take the following steps 1 Set the unit s 1 0 ON OFF switch to the 0 OFF position and unplug the power cord 2 Remove the rear and front cabinets 3 Disconnect the two leads to the capacitor and remove the nut from the mounting screw 4 Remove the nut and washer below the capacitor 5 To install the new capacitor connect the leads and replace the capacitor and associated hardware 2010 2229 Rev B Page 17 of 52 5 4 Process Control Valve The Nuvo 8 uses an electronic valve system valve assembly to control the air separation process There is a feed port that connects to the heat exchanger and an exhaust port that connects to the exhaust muffler outlet There are three possible valve states as follows 1 Air feed connected to sieve bed and exhaust connected to sieve bed 2 Air feed connected to sieve bed B and exhaust connected to sieve bed A Air feed connected to sieve bed amp both exhaust closed normal de energized condition The control valve of the Nuvo 8 unit requires no scheduled maintenance If a valve does not function as required it is best to replace the complete sieve module as it is probable that one or both of the beds has been damaged 5 5 Sieve Bed Module Replacement CAUTION Do not expose molecular sieve contents of bed to air for an extended period of time Prolonged exposure of
38. ow the unit to run for 15 minutes 5 Using a calibrated oxygen analyzer verify concentration is greater than 87 percent Routine Service Check Perform routine servicing as shown in the chart below Record the activities performed in the log provided on the following page 1 Record the elapsed usage time in hours 2 Check oxygen concentration with a calibrated oxygen analyzer 3 Verify audible alarm and indicator light functions between patients and every two years 4 Inspect filters and replace as necessary Serial Number Between Patient Maintenance 1 Remove oxygen tubing cannula and humidifier bottle and discard 2 Wash or replace the humidifier tubing if used 3 Wash or replace the cabinet air filter 4 Clean the concentrator cabinet 5 Check oxygen concentration and flow If the unit performs within specification the final product filter does not need to be replaced between patients Patient Caregiver Maintenance 1 Inspect the Oxygen tubing cannula and humidifier bottle clean as needed according to manufacturer s instructions 2 Wash the cabinet air filter weekly with a mild detergent solution Dry before reinstalling onto the device The routine service intervals shown below depend on the conditions in which the devices are used They reflect the minimum recommendation when operated in a clean environment As conditions can vary widely the homecare provider or patient caregiver is responsible
39. ower switch in reverse order to install a new power switch 5 12 Buzzer Replacement The buzzer is a fixed component on the circuit board and is not individually replaceable 5 13 Hour Meter Replacement 1 Set the 1 0 ON OFF switch to the 0 OFF position and unplug the power cord Remove the cabinet back Disconnect the hour meter leads Push hour meter mounting tabs inward from the hour meter Remove the hour meter from the main structure Install the new hour meter into its mounting location and push the mounting tabs outward to secure hour meter Make sure that the hour meter is mounted right side up Reconnect the hour meter leads Reinstall the cabinet back C Ov GN N 5 14 Flow Meter Replacement 5 14 1 Flow Meter Removal 1 Set 1 0 ON OFF switch to the 0 OFF position and unplug the power cord 2 Remove the front and back cabinets as well as the control panel Ref 5 2 1 thru 5 2 3 On units with OCSI it is necessary to also first remove the circuit board 3 Remove the 3 8 inch silicone oxygen tubing from the flow meter fittings 4 Unscrew the flow meter nuts with a wrench or deep socket 5 Remove the flow meter through the control panel 5 14 2 Flow Meter Installation To install a new flow meter follow the flow meter removal procedure in reverse order Then perform a leak test on the connections 5 15 Power Cord Replacement 1 Set the 0 ON OFF switch to the 0 OFF position
40. planations As you read the manual pay special attention to the WARNING CAUTION and NOTE messages They identify safety guidelines or other important information as follows Describes a hazard or unsafe practice that can result in severe bodily injury or death Describes a hazard or unsafe practice that can result in minor bodily injury or property damage Provides information important enough to emphasize or repeat WARNING CAUTION NOTE The following harmonized symbols pictograms used for non English language countries will be located on the exterior of the Nuvo 8 unit Read the accompanying documents particularly the patient operating guide Store ship and use the device in an upright condition No smoking within five feet of this device oxygen carrying tubing or accessories e Indicates an alarm signal Do not use any oil or grease on or near the device D gt 2010 2229 7 0152 1 3 Functional Specifications Dimensions 15 5 in long 15 6 in wide 27 8 in tall 394 mm long 396 mm wide 706 mm high Weight 50 to 54 Ib 22 5 to 24 5 kg Electrical 120 VAC 60 Hz 4 4 5 0 amps 500 watts avg Requirements 230 VAC 50 Hz 1 8 2 1 amps 490 watts avg 230 VAC 60 Hz 2 4 2 7 amps 585 watts avg Capacity 8 liters per minute at 9096 oxygen Based on 70 F 21 C at sea level Accuracy Flow meter 5 full scale Based on pre calibrated analysis Con
41. r cord before you service the Nuvo 8 Oxygen Concentrator NOTE Record all scheduled maintenance Refer to Section 4 1 5 Page 14 of 52 2010 2229 Rev B 5 2 Cabinet Removal 5 2 1 Removing Cabinet Back To remove the cabinet back remove two screws near the base one on each side and two inset screws at the top just under the handle 5 2 2 Removing Cabinet Front To remove the cabinet front remove two screws near the base one on each side adjacent to the rear cabinet screws and two inset screws at the top just under the handle It is necessary to remove the cabinet back to access the top screws 5 2 3 Removing Control Panel Eight screws hold the control panel in place the front cover must be removed to access these screws It is necessary to remove the electrical wiring and pneumatic tubing to fully release the control panel 5 2 4 Main Structure The weight and forces of the internal components rest solely on four parts the main structure the compressor plate the base plate and the base These parts were specially designed and formed They should never require replacement under normal use 5 2 5 Caster Replacement The casters are a push in type that do not require any fasteners Lay the device on its back to access the casters from the bottom Pull them straight out away from the bottom 5 3 Compressor The compressor is the pump within the oxygen concentrator that supplies air to the separation process performed
42. rear cabinets 3 Cut the tie wrap holding the regulator in place Remove from the main structure 4 Adjust the product regulator fully counterclockwise to unload the spring This makes disassembly and reassembly easier 5 Remove the diaphragm Clean or replace it 6 Use a hex head screwdriver to unscrew the diaphragm stem guide located in the center of the regulator body to gain access to the seat Remove the seat Be careful not to lose the spring located behind the seat Replace the seat or clean by blowing clean air on and around it With the spring behind the seat screw the diaphragm stem guide back into the body of the regulator Do not over tighten 10 Install a clean or replacement diaphragm 11 Putthe large spring and slip ring into the bonnet and screw the bonnet onto the regulator body 12 Reinstall the regulator mounting it securely to the main structure 13 Reset product regulator as described in Section 5 8 1 Co 2010 2229 Rev B Page 21 of 52 5 9 High or Low Pressure Switch Replacement Standard Unit only The high and low pressure alarms are activated by a pressure transducer located on the circuit board adjacent to the mains switch 1 Set 1 0 ON OFF switch to the 0 OFF position and unplug the power cord Remove the back and front cabinets and the control panel 3 Disconnect the 7 pin connector from the circuit board 4 Disconnect tubing from pressure sensor by cutting ti
43. rebuild or exchange compressor Check filter suction resonator and suction tube for obstruction Low concentration Inlet air filter is dirty or partially blocked System leak Faulty compressor Unit temperature too high Contaminated sieve module Defective control valve Restriction in exhaust muffler Restriction of inlet air Replace inlet air filter Leak test and repair leak Check system pressure and rebuild or replace compressor Blocked air intake or dirty inlet air filter faulty cooling fan Check that P1 and P2 pressures are within range Replace sieve module Repair or replace sieve module Replace or clean exhaust muffler Check inlet tubing for obstruction and remove Page 32 of 52 2010 2229 Rev B 6 5 Tool Kit and Pressure Test Gauge The tools needed for you to properly service the Nuvo 8 unit are listed below Appendices Requires no special tools generally available tools including common pliers channel lock wire cutters needle nose pliers slotted head screwdriver long Phillips head screwdriver 8 inch adjustable wrench 7 16 inch socket 7 16 inch combination wrench 5 8 inch combination wrench and 3 8 inch combination wrench For convenience it is desirable to have a battery operated drill motor available to remove and install screws An accurate pressure test gauge to take both high and low pressure readings on the Nuvo 8 unit should
44. rers of any incidents that if repeated could cause injury to any person email info nidekmedical com Please update maintenance log information upon each service at www nidekmedical com under the Maintenance Log tab Page 52 of 52 2010 2229 Rev B
45. s absolved of all liability in the event of an incident Do not open the equipment when it is powered on risk of electrocution This device complies with the requirements of the FDA Quality System Regulation and EU Directive 93 42 EEC but its operation may be affected by the use in the surrounding area of appliances such as diathermy high frequency electro surgical instruments defibrillators short wave treatment appliances cell phones CB devices and other portables microwave ovens induction hot plates or remote control toys and more generally by electromagnetic interference exceeding the levels specified in standard IEC EN 60601 1 2 1 0 Introduction 11 Home Service Provider Responsibility All Home Service Providers of the Nidek Medical Nuvo 8 Oxygen Concentrator must assume responsibilities for handling operational check out patient instruction and maintenance These responsibilities are outlined below and throughout this manual WARNING Nuvo 8 units must not be used for or with any life supporting or life sustaining applications Patients unable to communicate discomfort while using this device may require additional monitoring Advise patients to immediately notify their Home Service Provider s and or physician s in case of an alarm or any discomfort As a Home Service Provider you must do all of the following e Inspect the condition of each Nuvo 8 unit immediately upon delivery to your business location Note any sig
46. scription Required Measure 9250 1002 1 CABINET FRONT NUVO 1 000 EA 9250 1050 2 SCREW 10 32 X3 8 PAN HD PHIL 4 000 EA 2010 2229 Rev B Page 47 of 52 SEE CABINET BACK ru OB V A 10 REAR CABINET ASSEMBLY NUVO 0550 0380 REV A Part Reference Call Out Qty Unit of Number Number Part Description Required Measure 9250 1200 1 CABINET BACK W ACCESS DOOR 1 000 EA 9250 1025 3 FILTER CABINET INLET 1 000 EA 9250 1050 4 SCREW 10 32 X3 8 PAN HD PHIL 4 000 EA 8400 0022 5 RETAINER CORD VELCRO 1 000 EA 8400 0023 5 RETAINER CORD RIVET 1 000 EA 9114 0G13 5 CORD RETAINER 1 000 EA 6490 9922 6 SNAP RIVET NYLON 0 320 0 340 1 000 EA 6490 9925 7 SNAP RIVET NYLON FEMALE 1 000 EA Page 48 of 52 2010 2229 Rev B A 11 SIEVE MODULE ASSEMBLY 0600 0480 2010 2229 Rev B Page 49 of 52 A 11 1 SIEVE MODULE ASSEMBLY PARTS Part Reference Number 8400 1200 8400 1226 8400 1227 8400 1212 8400 1213 8400 1260 8400 1265 8400 1221 8400 1322 8400 1230 8400 1234 8400 1251 8400 1233 8400 1350 6490 9926 8615 4044 9251 1350 9010 5G18 9010 5G16 8644 9401 8400 1051 9250 1051 6816 4162 8400 1221 8400 1225 8400 5013 8644 9401 9251 1228 9251 1534 8400 1351 Page 50 of 52 Call Out Number A ol on 2 A 0900 00 KW o OWNN its o o o Oo 0 gt 99999 0600 0480 Qty Unit of Part Description Required Measure VAL
47. unit The pressure should read approximately 17 psig 117 kPa 2010 2229 Rev B Page 27 of 52 5 Connect test pressure gauge to the P1 test port on the valve inlet The pressure should be cycling between approximately 13 and 40 psig 90 and 275 kPa 6 Make sure the unit is cycling properly by observing the pressure gauge cycle between a high and a low pressure If the unit is not cycling properly refer to troubleshooting chart 7 Make sure that the unit is leak free by testing all tubing connections and fittings with leak testing solution Protect circuit board from solution and start leak test at the compressor outlet following the air flow through the unit to the oxygen outlet Repair all leaks by tightening connections and fittings 8 Set the concentrator at 8 l min and connect pressure test gauge to P2 at the top of the sieve module Determine pressure parameters by observing high and low pressure points on the gauge It should cycle between approximately 13 psig and 40 psig 90 to 275 kPa If pressures are high or low refer to the troubleshooting chart 9 Review troubleshooting chart to isolate and repair any other malfunctions The following diagnostic flow chart will help to isolate potential problems Page 28 of 52 2010 2229 Rev B LowOxgen Concentration N _ d Verify Oxygen A Flow Rate pw Measure Air Pressue Low Pressure Pressure Replace Air Inlet Filt
48. vironment 1 Set the unit 1 0 ON OFF switch to the 0 OFF position and unplug the power cord 2 Remove the rear cabinet access panel to locate the intake filter 3 Remove filter from the unit and replace with a new filter 4 Record information about the filter replacement in Appendix 12 of this manual and online at www nidekmedical com under the Maintenance Log tab 5 Reinstall the access panel 4 1 4 Battery Replacement Each time the Nuvo 8 unit is turned on the alarm must sound loudly for approximately five seconds to indicate a good battery An alarm that does anything other than sound loudly for five seconds indicates a weak battery and requires replacement For units with OCSI actuate the switch with the power cord unplugged to test the battery To replace the battery take the following steps 1 Set the 1 0 ON OFF switch to the 0 OFF position and unplug the power cord Remove the access panel in the cabinet back Pull the battery from the mounting slot and remove the connection wires Attach the new battery to the connector and reinsert it into the mounting slot Set the 1 0 ON OFF switch to the ON position to test the alarm Record the battery replacement information in Appendix 12 of this manual and online at www nidekmedical com under the Maintenance Log tab 7 Reinstall the access panel 4 1 5 Recording Maintenance As the Home Service Provider it is suggested that
49. y 0140 0380 for the 115 volt unit 2010 2229 Rev B Part Reference Number 9250 1069A Page 40 of 52 A 5 1 STRUCTURE ASSEMBLY PARTS 9251 1501 9251 1503 9250 1004 9251 1402 8400 5018 9250 1047 9250 1020 9250 1180 6814 9228 9250 1030 9251 9226 9250 1069 9251 1508 9250 1059 9251 1533 9250 1102 9030 6008 9250 1058 5190 2233 6120 9854 9200 0502 9250 1510 9251 1516 9251 1520 9251 1521 9251 1522 9251 1523 9251 1524 9251 1525 9251 1594 8400 1209 9250 1024 9250 1026 Call Out Number OMAN N o cg p Qo 5 A gt BASE PLATE MODIFIED STRUCTURE MAIN NUVO STRUCTURE MAIN NUVO BATTERY DURACELL 9 VOLT HOURMETER 100 230V 50 60 BOLT 1 4 20 X 3 4 LG WASHER FLAT 1 4 FILTER AIR INLET ELBOW 1 2 DOUBLE BARB GOMMET RUBBER TUBE ASSY SOUND INLET CONNECTOR NYLON 1 2 HOSE TUBE 25 IDX 375 ODX4 25 HARNESS WIRING 230 VOLT CONNECTOR MOLDED INLET TIE WRAP 24 LONG VIBRATION TIE WRAP 4 5 OVERALL BOLT 1 4 20X 5 LG GRADE2 HOLDER TIE WRAP SCREW 6 TYPE X 1 2 SHEET NUT 8 32 NYLON LOCKING HARNESS WIRING 220 VOLT STANDOFF PLASTIC SCREW 8 32X 2 5 PHILLIPS SPACER 3 8 0DX 175 IDX1 4 LG CLAMP 0 375 TUBING EXCHANGER HEAT 8 LPM FOAM VENT COVER LEFT FOAM VENT COVER RIGHT EXCHANGER HEAT 3 8 8 LPM BOARD TIMING 8 LPM FAN
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