Q155 Service Manual
Contents
1. M AIR COMPRESSOR HEAT EXCHANGER MUFFLER C SOLENOID ELLI ei VALVE ELECTRONICAL CONTROL SIEVE BED x2 CIRCUIT XY GEN TANK NEW O i UNIT BLOCK ALL IN ONE REGULATOR OXYGEN OUT BACTERIA FILTER FLOW METER Figure 3 1 Process Schematic MERITS HEALTH PRODUCTS CO LTD BECH ee db Fil 3 2 Exterior Parts Exterior parts described below N Exterior Cabinet The Exterior Cabinet which material is ABS is strength durability It is made up of front and rear cabinet Flowmeter Knob Displays and controls the oxygen flow rate ON OFF Power Switch Starts and stops the operation of concentrator Circuit Breaker Cut off concentrator after an electrical overload Oxygen Outlet The connection port for humidifier Operating Instruction Label The operating instruction for easy reference by the patient Warning Label Indicates that you must reference important information Serial Number Label Shows the serial number of the concentrator Cabinet Air Intake Filter Cleans the Air enters the concentrator Electrical Specification Label Indicates power requirements and safety approvals Air Exhaust Vents Exhaust Aur exits the concentrator Hand Grips Convenience to move the concentrator Power Cord Socket Plug in power cord Casters On the bottom provide convenience to move the conce2. Circuit Breaker 8A Breaker 4A 24Kg 531b 27Kg 59 51b 10C 35C Impact Resistant flame retardant plastic cabinet CSA 601 UL 2601 IEC EN 60601 1 0 3 LPM Dry Up to 95 C 60C non condensing well ventilated area 20 Table 1 3 Specification of Oxygen Concentrator 1 Conditions may vary based on altitude above sea level barometric pressure and temperature Specification subjects to change without notice 2 This product complies with the following standards C22 2 No 601 1 M90 UL Std No 2601 1 and IEC EN 60601 1 3 For electromagnetic compatibility the standards are based as follow CSA 601 1 2 and IEC EN 60601 1 2 4 Protection against electric shock is classified as Type II 5 Degree of protection against electric shock 1s classified as Type BF 6 Mode of operation belongs to continuous mode 7 Equipment not suitable for use in the presence of a flammable anesthetic mixture with air or with oxygen or nitrous oxide 8 Degree of protection against ingress of water is rated as IPXO MERITS HEALTH PRODUCTS CO LTD 1 4 4t merits 2 Patient Instructions 2 1 Unpacking l il 11 IV Check for any obvious damage to the carton or its contents If damage is evident notify the carrier or your local dealer Remove all loose packing from the carton Carefully remove concentrator from the carton See Figure 2 1 Inspect the cabinet exterior thoroughly for damage If damage
3. Do not use any sharp or corrosive materials D Always use clean and or replace the humidifier in accordance with manufacturer s or dealer s instructions n The patient should never service or open this machine It is to be serviced by qualified personnel only nN The oxygen concentration should be checked every 90 days for units without optional oxygen sensors The oxygen concentration should be checked every 6 months for units with optional oxygen sensors 2 3 2 Cleaning Cabinet Air Intake Filter i Remove the cabinet filter and CLEAN AT LEAST ONCE A WEEK depending on environmental conditions See ii Figure 2 2 i Clean the cabinet filter with a vacuum cleaner or wash in warm soapy water and rinse thoroughly See iv Figure 2 3 v Dry the filters thoroughly before reinstallation MERITS HEALTH PRODUCTS CO LTD Se Jt Intake Filter Cabinet Filter Figure 2 2 Position of Cabinet Filter MERITS HEALTH PRODUCTS CO LTD 2 3 4t merits LID EN A SS Ss SS SORRY NNA NA SEN SE SO SSNS SRY IW RXS ARY DR AX A Uy NYS U AN Ay N a Figure 2 3 Clean Cabinet Filter 2 3 3 Humidifier Note Q155 Service Manual To clean the oxygen humidifier follow the instructions provided by the manufacturer If none are provided follow these steps i Clean the humidifier every day ii Wash it in soapy water and rinse it
4. Drawings of Solenoid Valve Assembly A 5 Figure A 5 Exploded Drawing of Sieve Bed Assembly ccccecccccseeeeeeeeeeeeeees A 6 Figure A 6 Exploded Drawing of Central Frame Assembly ssseeeseseessseesssersssees A 7 Figure A 7 Exploded Drawing of Muffler Assembly A 8 Figure A 8 Exploded Drawing of Air Compressor Assembly cecccceeeeeeeeees A 9 Figure A 9 Exploded Drawing of Central Frame Assembly ee A 10 Figure A 10 Exploded Drawing of Harness Assembly nnesseessseesssersssersssersssees A 11 Figure A 11 Exploded Drawing of Accesgsorieg A 12 MERITS HEALTH PRODUCTS CO LTD i List of Tables Table 1 1 List of specified warranty period components ccecceeeeeeeeeeeeeeeeeeees 1 3 Table 2 Lis ot COms ua OC ee ne ae ee 1 3 Table 1 3 Specification of Oxygen Concentrator ueeeeesseseesessennesennnnsennnnenneneenenennn 1 4 Table 3 1 LED Indicator vs Oxygen Purity sesenssenssesssesserssersserssersseessersseesses 3 5 Table 3 2 The Symptom or Alam ass a a 3 5 Table e Ne ee e e ee ee ee 6 2 Table 7el Spar Pills see ee ae ee ee 7 1 BE 8 1 Tool Renee aan 8 1 MERITS HEALTH PRODUCTS CO LTD ji oll al SkWETIS iss sevice Manual 1 Introduction The Merits oxygen concentrators are as a solution to deliver a clean portable and continuous oxygen supply for homecare usage Merits introduces proudly the Q155 Oxygen Concentrator These concentrators were built with quality workmanship and de
5. Figure 4 8 The power lead Of compressgor 4 4 Pere re Ale ere 4 5 Figure 4 10 The capacitor Of compressgor 4 5 Pare 421 TL Awe aa Tan rer ee 4 6 Figure 4 12 E al esse REN 4 6 at E gt CR UL OGG ee ee ee re 4 8 Figure 4 14 Oxygen sensor board 4 9 Figure KR lee a 4 10 Figure 4 16 Pressure reculat ee 4 10 Figure 4 17 Leads of Circuit breaker and ON OFF owtch 4 11 Fisure 4 18 Unscrew circuit Drak Cf nenne aa 4 11 Figure 4 19 Remove ON OFF switch 2002220022sssnnesensessennssennnnsnnnnnennnneensnnenen 4 12 Figure 4 20 Oxygen monitor LED connector 4 12 Figure 4 21 Press down tabs of hour meter 4 13 Figure 22 Remove hour EE nu ea ee 4 13 Figure 4 23 Uscrew flowmeter mut 4 14 Piste eI EE 4 14 Figure 4 25 Detect operating pressure eeeeessseensssenessnnnesennensnnnnnensensnnssnennenennssnenen 4 15 Fisuse 3 1 aD mel adir miet TET are 5 1 Figure 5 2 Arr intake fine particle filter ee ccesscccsesecccessecccesscceessccsensceeeesecs 5 2 Lan gt AC Chi Eller en ee ee ee een 5 2 Pare 3 1 TOOL INTC 9 Ci VCC er ae 8 1 MERITS HEALTH PRODUCTS CO LTD iii a7 Merits lg Q155 Service Manual Figure A 1 Exploded Drawing of Base Assembly cccceccccsesccceeeeeeeeceeeeeeeaeees A 2 Figure A 2 Exploded Drawings of Housing Assembly nesenesenssenssersserssersserssees A 3 Figure A 3 Exploded Drawing of Sieve Bed amp Valve Assembly A 4 Figure A 4 Exploded
6. Replacement E 4 4 3 3 Sieve Bed Replacements nn 4 2 rhs ROMO ICCB E 4 3 4 4 1 Compressor Maintenance eeseesseessoesseesseesssesssesseessseessesssesssersserss 4 3 4 4 2 Compressor Assembly Replacement 4 3 4 4 3 Compressor Relief Valve Test and Renl cement 4 4 44 4 Capacitor Replacement see ee 4 5 4 5 Axial Fan Renlacement 4 6 2 6 EE Board Replaee mic Ot nern 4 7 4 6 1 Circuit Board Removal u ea 4 7 4 6 2 Circuit Board Installation 0 0 0 cece ceeccceesceceeeeceeeeeenseeaeeeeeeeseeeeseees 4 8 4 6 3 Oxygen Sensor Circuit Board Removal 4 8 4 6 4 Oxygen Sensor Circuit Board Installation cc eecccseeeeeeeeeeeeeeees 4 9 4 7 Product Regulator Setting and Renl cement cc ecccseccceeeeeeeeeneseeeees 4 9 A S Circuit Breaker Rep laCeme mt near 4 10 4 8 1 Circuit Breaker REM Wlan un 4 10 4 8 2 Circuit Breaker Installation nen 4 11 4 9 ON OFF Power Switch Renlacement en 4 11 4 9 1 ON OFF Power Switch Removal ana swans 4 11 4 9 2 ON OFF Power Switch Installation cc ecccceeeceseeeceeseeeeeeeeaeeeens 4 12 4 10 Oxygen Monitor LED Replacement nonnnsenssensseessoesseesserssersseesses 4 12 4 11 Hour E El d 4 12 4 12 Plow meter ReEplaCe ment een aa 4 13 24 12 Na de WOW DELL FRI ME 4 13 4 12 2 Flow meter Installati n see 4 14 4 13 BuzZer Replacement u 4 14 4 14 Operate Pressure I Stetten 4 15 4 15 Sektor 4 15 4 16 Low Operating Pressure re een 4 15 4 17 E E OCC ur E e
7. The compressor produce compressed air to enter the sieve bed The nitrogen is adsorbed in the sieve bed and the oxygen to flow out of the sieve bed The noise and thermal energy of the concentrator result mainly from the compressor So the efficiency of producing oxygen and noise level of the concentrator are decided by compressor So there are two different conditions of the compressor that cause concern compressor output and noise level N Output Compressor output refers to how much volume and pressure of compressed air the compressor can produce Because seals wear the compressor output reduces gradually after a long time period and results in the reduction of oxygen purity You can detect the oxygen purity at 5 Ipm If the purity is below 90 the concentrator needs service N Noise Level The conditions of the compressors bearings mainly determine its sound level If the bearings wear that they become too noisy the compressor will need to be rebuilt or replaced 4 4 1 Compressor Maintenance Preventative maintenance on the Merits compressor is not required You do not need to perform any maintenance on the compressor as long as the concentrator output is within Merits specifications See Section 1 1 4 4 2 Compressor Assembly Replacement N Compressor Assembly Removal To remove the compressor assembly for replacement follow the below steps L Set the unit s ON OFF switch to the OFF position and unplug the power cord 1i Re
8. Wind Mask Ass y Cabinet Assy Control Panel Ass y Flow Meter Ass y Flow Control Valve Ass y Solenoid Valve Ass y Unit Block Ass y Sieve Bed Ass y Central Frame Ass y Crashproof Plate Ass y Intake Muffler Ass y Outlet Muffler Ass y Compressor Ass y Buzzer Ass y Oxygen Monitor LED Ass y Q ty Part Number 1 P18 1 P19 1 P22 3 PO1 3 P02 3 P03 3 P04 3 P41 3 P43 DO 9 P02 9 P03 9 P04 9 P05 9 P06 9 P07 9 P08 9 P09 9 P10 9 P11 9 P12 9 P13 9 P14 9 P15 9 P31 Component Maintenance Door Intake Foam Knob Silicon Tubing Silicon Tubing PVC Tubing PVC Tubing Intake Filter Bacteria Filter Circuit Board Oxygen Monitor Board Panel Power Supply Wires Ass y Oxygen Monitor Board Wire Hour Meter Valve Power Supply Wires FAN Power Supply Wire Breaker Wire ON OFF Power Switch Wire Axial Fan Axial Fan Circuit Breaker ON OFF Power Switch Power Cord Pressure Switch Wire User Manual Table 7 1 Spare Parts Q ty Ile 8 Tool Kit The service tools are shown in Figure 8 1 and list below Figure 8 1 Tool Kit of Service Item Tool Name 1 Philips head Screwdriver 8mm Combination Wrench 2 Slotted head Screwdriver 3 Needle nose Pliers 4 Wire Cutters 5 Pressure Test Gauge 6 4mm T head Hexagonal key 7 3mm T head Hexagonal key 8 9 Hose Clamp Stripper Table 8 1 Tool Kit MERITS HEALTH PRODUCTS CO LTD 8 1 ae II E J S Q155 Serv
9. air inlet oxygen outlet disconnect the PU tube from the pressure detect fitting See Figure 4 3 v Loose the six screws of solenoid valve and remove solenoid valve See Figure 4 4 vi Install new solenoid valve assembly and tighten six screws vii Reconnect the tubes and clamps of the waste outlet air inlet oxygen outlet Connect the PU tube to pressure inspect fitting located at valve base vill Reconnect the terminal of solenoid valve Oxygen outlet Pressure detect fitting Waste air outlet Figure 4 3 waste outlet air inlet oxygen outlet MERITS HEALTH PRODUCTS CO LTD 42 Six screws of the solenoid valve Figure 4 4 Remove solenoid valve 4 3 2 Solenoid Coil Replacement 1 Set the ON OFF switch to the OFF position and unplug the power cord 11 Remove the cabinet See section 4 2 1 i Disconnect the terminal of the damaged solenoid coils See Figure 3 8 iv Loose the fixing nuts above solenoid coils and remove the coils See Figure 4 5 v Install new Coils vi Tighten the coils fixing nuts and connect the terminals of coils Figure 4 5 Remove solenoid coil MERITS HEALTH PRODUCTS CO LTD adiej H 4 3 3 Sieve Bed Replacement After long term usage the ability of producing oxygen of molecular sieve finally decline It is necessary to replace sieve bed for solving this issue Please pay attention to replace both sieve bed at the same time Please follow the following proc
10. instruction for service engineers and distributors only This is not a manual for patient use MERITS HEALTH PRODUCTS CO LTD aele dh Pil 1 3 Safety Rules As you read the manual please pay attention to all of following 1 3 1 Warning nN Fire Hazard Oxygen promotes rapid burning No Smoking or Open Flames N Electrical Shock Hazard do not remove the cabinet or open the cover N Disconnect the power cord from the electrical outlet before cleaning or servicing N Do not place this equipment near hot sparking or burning objects N Do not use oil or grease on or near this device N Do not use the concentrator in the presence of pollutants or dangerous fumes N An alternate source of oxygen should always be available to avoid any interruption in supply This unit is not intended for life sustaining or life supporting applications Turn the unit off when it is not n use In the event of an alarm contact your equipment provider gt 2535 If you experience any signs of discomfort contact your physician immediately N Merits recommends that each concentrator be on and running for a minimum of 60 minutes at a time N Keep the cord away from HEATED or HOT surfaces n NEVER drop or insert any object into any opening n NEVER block the air openings of the product or place it on a soft surface such as a bed or couch where the air opening may be blocked D Avoid the operation in wet or damp locations D Geriatric pediat
11. into the control panel and tighten the screws vi Reconnect the LED connector vii Install the control panel and the cabinet Screws Figure 4 20 Oxygen monitor LED connector 4 11 Hour Meter Replacement 1 Set the unit s ON OFF switch to the OFF position and unplug the power cord ii Remove the cabinet and control panel inside See section 4 2 1 i Disconnect the terminal of hour meter from control board See Figure 4 21 iv Push both sides of hour meter tabs away from the central frame See Figure 4 v Remove the hour meter vi Install the new hour meter into the central frame MERITS HEALTH PRODUCTS CO LTD 4 12 vii Plug the hour meter terminal into control board viii Install the control panel and the cabinet Figure 4 21 Press down tabs of hour meter Figure 4 22 Remove hour meter 4 12 Flow meter Replacement 4 12 1 Flow meter Removal i Set the unit s ON OFF switch to the OFF position and unplug the power cord 11 Remove the cabinet and the control panel inside See section 4 2 1 ii Cut the tie wraps and remove oxygen tubing from the flow meter fittings iv Unscrew the flow meter nuts with a wrench See Figure 4 23 v Remove the flow meter through the control panel MERITS HEALTH PRODUCTS CO LTD A 13 Figure 4 23 Uscrew flowmeter nuts 4 12 2 Flow meter Installation To install a new flow meter follow the flow meter removal procedure in reverse order Then perform a leak t
12. is evident notify the carrier or your local dealer Figure 2 1 Unpacking Note Unless the oxygen concentrator is to be used immediately retain container and packing materials for storage until use of the concentrator is required Note The concentrator should always be kept in the upright position to prevent cabinet damage while being transported 2 2 Check Q155 Oxygen Concentrator is tested thoroughly to make sure the function is normal after manufacture Please perform the following procedure to ensure no damage occurred in shipping i Plug in the power cord and set the ON OFF switch to the ON position Then check whether the following occurs or not a The oxygen purity indicator lights illuminate accompanied with one beep and then off in 2 minutes b Listen the sound of compressor running c Exhaust air flows out of the bottom of concentrator MERITS HEALTH PRODUCTS CO LTD D E db Fil ii Turn the flowmeter adjustment knob counterclockwise until it stops wide open Check the position of the ball inside flowmeter It must be on the top of flowmeter 111 The oxygen purity indicator green light illuminates in ten minutes after switch on 2 3 Routine Maintenance by the patient To ensure concentrator normal work the patient must perform the following simple maintenance steps 2 3 1 General Caring N Daily inspection of the cabinet filter should occur Lightly vacuum or sweep off
13. strap D Store PCBs only in anti static bags 4 6 1 Circuit Board Removal L Set the unit s ON OFF switch to the OFF position and unplug the power cord 11 Remove the cabinet See section 4 2 1 iii Disconnect all connectors from the circuit board See iv Figure 4 13 v Remove the circuit board from supports See H ndle the new circuit board only by the edges to prevent electro static damage to Whe unit Vote to the unit 4 13 Note Handle the new circuit board only by the edges to prevent electro static damage to the unit MERITS HEALTH PRODUCTS CO LTD 4 7 Jt mm piba Support Support Figure 4 13 Circuit board Note Handle the new circuit board only by the edges to prevent electro static damage to the unit 4 6 2 Circuit Board Installation i Attach the circuit board to the supporting tabs ii Firmly plug in all connectors to the circuit board ti Reassemble the cabinet 4 6 3 Oxygen Sensor Circuit Board Removal i Set the unit s ON OFF switch to the OFF position and unplug the power cord ii Remove the cabinet See section 4 2 1 i Disconnect the wire connector from the oxygen sensor circuit board See Figure 4 14 iv Remove clamps and the tubing from the oxygen sensor See Figure 4 14 v Remove the oxygen sensor circuit board from the supports MERITS HEALTH PRODUCTS CO LTD A 8 Clamp and Connector Support Figure 4 14 Oxygen sensor board Ha
14. EEESESSSTR BRR EE Figure A 3 Exploded Drawing of Sieve Bed amp Valve Assembly A 4 MERITS HEALTH PRODUCTS CO LTD JL on Drawing No Q1B044 01 M Solenoid Valve ASS y Issue Date 05 17 2007 Version 0 ees Figure A 4 Exploded Drawings of Solenoid Valve Assembly MERITS HEALTH PRODUCTS CO LTD A 5 JL on Drawing No Q1B045 01 M Sieve Bed Ass y Issue Date 05 17 2007 Version 0 7 Ben Figure A 5 Exploded Drawing of Sieve Bed Assembly MERITS HEALTH PRODUCTS CO LTD A 6 4 merits Q155 Service Manual Central Frame Ass y Drawing No Q1C052 01 M Issue Date 05 17 2007 Version 0 SCH 3 P01 lt gt 37803 amp 3 P02 a NU E d 2 N N F y A Cuir SE Wes 39 001 Figure A 6 Exploded Drawing of Central Frame Assembly MERITS HEALTH PRODUCTS CO LTD A 7 4t merits Q155 Service Manual Drawing No Q1C053 01 M Muffler Ass y Issue Date 05 17 2007 Version 0 ore 3 P03 3 Pel 5 Se o JSPA ea BSP ee Sa Be Figure A 7 Exploded Dr
15. Power loss solution Replace faulty circuit board Check electrical connections Replace faulty air compressor Replace faulty capacitor Check electrical connections Replace faulty capacitor Replace faulty Cooling Fan Replace faulty temperature sensor Replace faulty circuit board Replace faulty compressor Replace faulty circuit breaker Replace faulty circuit board Check electrical connections Replace faulty buzzer Replace faulty circuit board Replace faulty regulator Replace faulty solenoid Valve Replace faulty sieve bed Refer section 4 17 Leak Test and repair leaking Check electrical connections Replace faulty cooling fan Clean foam filter or replace Check the intake filter or replace it Check all the tubes from the exhaust of air compressor down to the oxygen outlet or Replace the related faulty tubes Refer section 4 17 Leak Test and repair leaking Replace or reset the regulator Replace faulty solenoid valve Replace relief valve Repair or replace compressor Table 6 1 Troubleshooting MERITS HEALTH PRODUCTS CO LTD 6 2 ar Merits 7 Spare Parts Q155 Service Manual Spare parts which Merits offers are listed below The part numbers of components refer Appendix A Exploded Drawings for details Part Number 1 SO1 1 S02 1 S16 1 S17 1 S18 1 S19 2 S01 2 S21 2 S22 3 SO1 3 502 3 521 3 522 4 S0l 9 S01 9 S02 MERITS HEALTH PRODUCTS CO LTD Component Base Ass y
16. Purity PROBABLE CAUSE No power on wall outlet Tripped or faulty circuit breaker Faulty cable plug Faulty power switch Faulty temperature sensor Air outlet block Faulty Cooling fan Environmental temperature too high Faulty Solenoid Coil Restriction in air passages Faulty pressure sensor Faulty Control Board Faulty air compressor Leaking Leaking Faulty oxygen monitor board Faulty regulator Faulty solenoid valve Relief valve release Faulty compressor flow Sieve bed contaminated or molecule sieve invalid Environmental temperature too high Restriction in exhaust muffler Restriction in air passages MERITS HEALTH PRODUCTS CO LTD Q155 Service Manual SOLUTION Inspect house circuit breakers or fuses Reset or replace the circuit breaker Replace the cable plug Replace the power switch Replace the temperature sensor Keep oxygen concentrator at least three inch away from walls draperies or furniture Replace the cooling fan Control room temperature below 35 C Replace faulty Solenoid Coil Clean foam filter or replace Check the intake filter or replace it Check all the tubes from the exhaust of air compressor to the oxygen outlet or Replace the related faulty tubes Replace faulty pressure sensor Replace Control Board Replace faulty air compressor Refer section 4 17 Leak Test and repair leaking Refer section 4 17 Leak Test and repair leaking Replace faul
17. Q155 Oxygen Concentrator Service Manual MERITS HEALTH PRODUCTS CO LTD 9 Road 36 Taichung Industrial Park Taichung Taiwan R O C 40768 4 merits Table of Contents 1 Introduction l 1 LL DENU een ee l 1 e How to Use Service Mantal ee ee een l 1 e EE ee 1 2 oE Wann ee ee ee 1 2 e SN Ge e E 1 2 E ee EE 1 3 1 De SSP MIC AAO INS ee 1 4 2 Patient Instructions 2 1 GN E Bee a en E E 2 1 PD CCM E E 2 1 2 3 Routine Maintenance by the poatent nn 2 2 2 Sk 1 ll ee ee ee ee 2 2 2 3 2 Cleaning Cabinet Aur Intake Filter eecccsescceseeeceeseceeneeeaeees 2 2 Ge Ree eu 2 1 3 Operation 3 1 zA lege 3 1 SA D a a een 3 2 39 Pa ee e E E EEE 3 3 Loe Ee NR Le e R S 3 3 3 000 POS OW T E 3 3 3 3 3 Connect humidifier if prescribed by your physician 3 4 354 SEI GT WE 3 5 E E ee E TIO ee EE E 3 5 52920 Oxygen e eer ee 3 5 Sees SIMLOXVECH e Yes estate tiere is 3 5 Ib MARIN VS be Ud een E E 3 5 3 4 1 Power Faure Alarm Tettau nr 3 6 3 4 2 Low Pressure Alarm Test ans uses 3 6 34 3 High Presse Alarm eege 3 6 34 4 Overhedting Alarm OSE E 3 7 d Service 4 1 A erer EE 4 42 AIMEE ROO A erento 4 4 2 1 Removing the cabinet to access the air COmMpressor sssesssesssesssees 4 4 2 2 Caster R DIACE IME E 4 4 3 Unit Block Keplaceme nt isiosrsrrsri eN e iien 4 2 MERITS HEALTH PRODUCTS CO LTD j dh Pil 4 3 1 Solenoid Valve Assembly Renl cement 4 2 4 3 2 Solenoid Coll
18. See Figure 4 17 iv Unscrew the circuit breaker while you apply pressure to the circuit breaker retaining ring See Figure 4 18 MERITS HEALTH PRODUCTS CO LTD 4 10 Je meee r merits Q155 Service Manual Leads of ON OFF switch Leads of circuit breaker Figure 4 17 Leads of Circuit breaker and ON OFF switch Figure 4 18 Unscrew circuit breaker 4 8 2 Circuit Breaker Installation Follow the removal procedure for the circuit breaker in reverse order to install the new circuit breaker 4 9 ON OFF Power Switch Replacement 4 9 1 ON OFF Power Switch Removal 1 Set the unit s ON OFF switch to OFF position and unplug the power cord 11 Remove the cabinet and control panel inside See section 4 2 1 i Disconnect the leads from the switch See Figure 4 17 iv Press in all four tabs in the back of the power switch and remove the switch through the control panel See Figure 4 19 MERITS HEALTH PRODUCTS CO LTD 4 11 Figure 4 19 Remove ON OFF switch 4 9 2 ON OFF Power Switch Installation Follow the removal procedure for the ON OFF power switch in reverse order to install a new power switch 4 10 Oxygen Monitor LED Replacement 1 Set the unit s ON OFF switch to the OFF position and unplug the power cord ii Remove the cabinet and control panel inside See section 4 2 1 i Disconnect Oxygen Monitor LED connector See Figure 4 20 iv Loose the screws and remove LED See Figure 4 20 v Install the new LED
19. art Note Number Intake Foam 1 P19 Clean every week Bacteria Filter 1 P43 Replace after every 10 000hr use Intake Filter 3 P41 Replace on clean condition Table 1 2 List of consumable MERITS HEALTH PRODUCTS CO LTD 13 sr Merits 1 5 Specifications Electrical Requirements Rated Current Input Sound Level Operating Altitude Oxygen Concentration Oxygen Delivery Pressure Optional Oxygen Sensor Flow Range Maximum Recommended Flow Average Power Consumption Pressure Relief Activation Filters Alarms Visual Audible Dimensions Circuit Breaker amp Fuse Weight Shipping Weight Operating Ambient Temperature Cabinet Regulatory Listing Change in Max Flow with 7 kpa Back Pressure Recommended Storage and Shipping Temperature Q155 Service Manual 115VAC 10 60Hz 230VAC 10 50Hz 3 5A 1ISVAC 60Hz 1 8A 230VAC 50Hz 48dB A Average Do not use at altitude over 4000 meters 90 at 1 SLPM Stated performance maximum achieved after 60 min of run time 6 0 5psi 40 4 kPa Oxygen Purity LED Indicator Over 85 3 GREEN Indicator light 70 43 to 85 43 YELLOW Indicator light Below 70 43 RED Indicator light 0 5 LPM 5 LPM 350W 250kPa 10 Cabinet Bacteria and Compressor Inlet High temperature w compressor power shutdown High Low pressure alarm Power loss alarm 68cm 26 8 High x 45cm 17 7 Wide x 33cm 13 Deep 115 VAC 60Hz Circuit 230VAC S50Hz
20. artment and attach to the oxygen outlet of the concentrator See Figure 3 5 Humidifier Bottle Oxygen Outlet Connector Humidifier Outlet Figure 3 5 Attaching the humidifier to oxygen outlet Note The Salter Labs 7100 350c c Bubble Humidifier and the B amp F Medical Bubble Humidifier are suitable for use with the Oxygen Concentrators Or a humidifier capable of 30 Psi operation and 15 LPM of flow is required Use of certain humidifiers not specified for use with this oxygen concentrator may impair the performance MERITS HEALTH PRODUCTS CO LTD 3 4 dh Pil 3 3 4 Start up The Merits Pioneer Oxygen Concentrator operates on standard household electricity Press the ON OFF power switch to the ON position The power indicator light will illuminate accompanied with one beep and then off in 2 minutes 3 3 5 Adjust flow rate Turn the knob on the flowmeter to adjust the flowrate to that prescribed by your physician The ball inside the flowmeter must be centered on the flowline for the desired flow rate Ball Flow Knob Figure 3 6 Adjusting the flowrate 3 3 6 Oxygen purity indicator This feature monitors the purity of oxygen generated by the oxygen concentrator The color of indicator light represent as following Oxygen Purity LED Indicator Over 85 3 GREEN Indicator light 70 43 to 85 43 YELLOW Indicator light Below 70 3 RED Indicator light Table 3 1 LED Indic
21. ator including the compressor solenoid valves circuit board unit block axial fan and all filters etc are easily accessible for service This allows you to perform scheduled maintenance repair and replacement of parts with minimal time and effort 4 2 Cabinet Removal 4 2 1 Removing the cabinet to access the air compressor Loose the four screws from the bottom of cabinet and take the cabinet apart from the base assembly See Figure 4 1 You can access the air compressor or most other parts Fixed screw Figure 4 1 Cabinet fixed screws 4 2 2 Caster Replacement i Lay down concentrator on the ground to access easily the caster wheels mounted on base plate ii Remove the caster nut with a 12 5mm socket See Figure 4 2 iii Install the new caster and tighten the nut Figure 4 2 Caster replacement MERITS HEALTH PRODUCTS CO LTD adiej 4 3 Unit Block Replacement 4 3 1 Solenoid Valve Assembly Replacement The oxygen concentrator uses solenoid valves to control airflow It is not necessary to do scheduled maintenance for the solenoid valves If the valve has got some trouble you can easily replace the valve The steps of replacing solenoid valve are as following 1 Set the ON OFF switch to the OFF position and unplug the power cord 11 Remove the cabinet See section 4 2 1 i Disconnect the terminal of the solenoid coil See Figure 3 8 iv Remove the clamps and disconnect the tubes on the waste outlet
22. ator vs Oxygen Purity 3 3 7 Start oxygen therapy You can use the output of the oxygen concentrator immediately However it may take up to 60 minutes to reach maximum oxygen concentration 3 4 Alarm System The Pioneer Oxygen Concentrator is equipped with an alarm system Alarm system will start up if four situations happen Symptom Alarm Power Loss ALARM One short beep long pause Overheating ALARM Two short beep long pause power shutdown High Pressure ALARM Three short beep long pause gt 2 2 0 2kgf cm Low Pressure ALARM Four short beep long pause lt 0 7 0 2kgf cm Table 3 2 The Symptom of Alarm MERITS HEALTH PRODUCTS CO LTD 3 5 Jt vgl em 3 4 1 Power Failure Alarm Test To test the power failure alarm Unplug the unit from wall outlet and set the ON OFF switch to the ON position This should immediately activate the audible alarm One short beep long pause 3 4 2 Low Pressure Alarm Test To test the low pressure alarm system 1 Set the ON OFF switch to the OFF position and unplug the power cord ii Remove the cabinet then disconnect the compressor power connector from the circuit board See Figure 3 7 i Plug in the unit and set the ON OFF switch to the ON position iv When the pressure is 0 7 0 2kgf cm below the audible alarm should be four short beep long pause and repeat this cycle v Set the ON OFF switch to the OFF position and unplug the power cord vi Reconnect the compressor
23. awing of Muffler Assembly MERITS HEALTH PRODUCTS CO LTD A 8 OTKA Sarv ra Drawing No Q1D042 01 M Issue Date 05 17 2007 ae merits Version 0 Air Compressor Ass y KR FL Figure A 8 Exploded Drawing of Air Compressor Assembly A 9 MERITS HEALTH PRODUCTS CO LTD Jt el Drawing No Q1E043 01 M Control Panel Ass y Issue Date 05 17 2007 Version 0 Figure A 9 Exploded Drawing of Central Frame Assembly MERITS HEALTH PRODUCTS CO LTD A 10 db rite rMETI 5 en Q155 Service Manual Service Manual Ha mess Issue Date 05 17 2007 Date en DITTO versioni O an SE Figure A 10 Exploded Drawing of Harness Assembly MERITS HEALTH PRODUCTS CO LTD EUR Drawing No QIF044 01 M Accessory Issue Date 05 17 2007 Version 0 User manual ae D oF Ol Figure A 11 Exploded Drawing of Accessories MERITS HEALTH PRODUCTS CO LTD A 12
24. e ee 4 16 5 Maintenance 5 1 3 ROUTING Maine MACS een ee 5 1 3 2 EN Pie PCE d TE 5 1 5 3 Air Intake Fine Particle Flter eccccecccsssccceeeceeeeeeeeeceseseeeeeseeseneees 5 1 3 4 Bacteria Piller Replacement en een 5 2 6 Troubleshooting 6 1 7 Spare Parts 7 1 8 Tool Kit 8 1 Appendix A Exploded Drawings 000n00ennsonnsoenssenssensseesserssersserssersssrsssreses A 1 MERITS HEALTH PRODUCTS CO LTD i 4 merits List of Illustrations Poue RB Ter 2 1 Figure 2 2 Position Of Cabinet E 2 3 Figure Cleam Cabinet Fillet EE 2 1 IU gt Process SB a 3 1 Poue ET e ea E EE E E E E 3 3 Fisufe e NEE 3 3 Figure 3 4 Filling the humidifier ccccccccceeeccccseececeeeecceeescccaeeececseeceeeeeseeeeanees 3 4 Figure 3 5 Attaching the humidifier to oxygen outlet 3 4 Figure 3 6 Adjusting the fTowrale eu a 3 5 Figure 3 7 Compressor power connector sssserssseresseesseeresseresseressereseersseeessee 3 6 Figure 3 8 Intake solenoid coil and termmna en 3 7 Fiure 529 Temperature SENSOR nase 3 7 Figure 4 1 Cabinet Axed REENEN 4 Piste 42 Caster EE re 4 1 Figure 4 3 waste outlet air inlet oxygen outlert 4 2 Figure 4 4 Remove solenoid Valve ccccccsescccesccceescceesccceesccaescceenseesuseesenseeaages 4 Figure 4 5 Remove solenoid 9 une aan 4 Figure 4 6 the mounting band of sieve be 4 2 Figure 4 7 The suction and feed tubes Of compressor esssesssesssesssersserssersserssees 4 4
25. edure to replace sieve bed Caution Do not expose molecular sieve contents of sieve bed to air for an extended period of time Prolonged exposure of 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 L Set the unit s ON OFF switch to the OFF position and unplug the power cord 11 Remove the cabinet See section 4 2 1 iii Loose the mounting band of sieve bed to free sieve beds See Figure 4 6 iv Remove the sieve beds v Remove solenoid valve assembly See Section 4 3 1 vi Seal the openings on the top of the sieve beds to prevent moisture damage The mounting band Figure 4 6 the mounting band of sieve bed vii To install the sieve bed follow the sieve bed removal procedure in reverse orders It is important to secure clamps on all tubes to eliminate leaks viii To check for leaks nN Plug in the unit N Set the unit s ON OFF switch to ON for three minutes with the flow meter setting at the 5 LPM D Apply soapy water around the sieve beds tubing connections and check for leaks N Set the unit s ON OFF switch to OFF and unplug the power cord MERITS HEALTH PRODUCTS CO LTD 42 EI ril Note Leaks can be so small in air loss that purity is not affected immediately The sieve material can become contaminated gradually Careful leak testing is important Refer to Section 2 16 4 4 Compressor
26. est on the connections as described in section 4 17 i Install the flow meter through the control panel ii Tighten the flow meter nuts with a wrench Torque setting at 62N cm 5 5inch pound iii Reconnect oxygen tubing from the flow meter fittings and fasten the tie wraps iv Install control panel and the cabinet 4 13 Buzzer Replacement 1 Set the unit s ON OFF switch to the OFF position and unplug the power cord 11 Remove the cabinet See section 4 2 1 i Disconnect buzzer connector from circuit board See Figure 4 24 iv Remove buzzer from the central frame by loosing the two screws v Install new buzzer and connect the connector to circuit board vi Install control panel and cabinet Connector Figure 4 24 Buzzer MERITS HEALTH PRODUCTS CO LTD 4 14 4 14 Operating Pressure Test Use the following procedure to test the operating pressure of the unit 1 Set the unit s ON OFF switch to the OFF position and unplug the power cord 11 Remove the cabinet See section 4 2 1 iii Connect the pressure gauge to pressure detect fitting on valve set Figure 4 25 iv Plug in the power cord and set the unit s ON OFF power switch to the ON position Set the flow meter to 5 LPM and allow the unit to run at least 3 minutes v Observe the maximum readings on the pressure test gauge vi The reading should indicate 1 2 bar pressure detect fitting Figure 4 25 Detect operating pressure 4 15 High Operati
27. ice Manual Appendix A Exploded Drawings Base Assembly Housing Assembly Sieve Bed amp Valve Assembly Assembly of Solenoid Valve Assembly of Sieve Bed Central Frame Assembly Muffler Assembly Air Compressor Assembly Control Panel Assembly Harness Assembly Accessories MERITS HEALTH PRODUCTS CO LTD sAd Sur S Drawing No Q1A043 01 M Base ASS y Issue Date 05 17 2007 Version 0 1 501 Figure A 1 Exploded Drawing of Base Assembly MERITS HEALTH PRODUCTS CO LTD A 2 Sur S Drawing No Q1A044 01 M Housing ASS y Issue Date 05 17 2007 Version 0 1 P19 Figure A 2 Exploded Drawings of Housing Assembly MERITS HEALTH PRODUCTS CO LTD A 3 Q155 Service Manual Q1B043 01 M Drawing No Issue Date 05 17 2007 0 Version Sieve Bed amp Valve Ass y al 6 SEIEN 52 Boos he 5 ISIS SSS GE SI SSS Ss SIESSEEISEISN SOBER SR SS IR ce RL SO RRR EE SS X SSLSSSS SS BRR SEEISESEELEELENN III SS EW SI SSNS SS SKN gt SS SSS Ee SS SSS SEW NISNI NNW RR SSSEE
28. move the cabinet and remove the crashproof plate above compressor See section 4 2 1 111 Disconnect the feed and suction tubes as shown in Figure 4 7 iv Disconnect the two leads of compressor See Figure 4 8 v Take away compressor directly MERITS HEALTH PRODUCTS CO LTD 4 3 D Compressor Assembly Installation To install the rebuilt compressor assembly i Perform the compressor removal procedure in reverse order ii Apply soapy water around the compressor tubing connections and check for leaking Suction tube Feed tube Crashproof Plate Power lead of compressor Lead of capacitor Figure 4 8 The power lead of compressor 4 4 3 Compressor Relief Valve Test and Replacement The procedure to test the compressor safety relief valve is as following 1 Set the ON OFF switch to the OFF position and unplug the power cord 11 Remove the cabinet il Remove the cabinet and disconnect the intake solenoid coil terminals of solenoid valves See Figure 3 8 iv Plug in the unit and set the ON OFF power switch to the ON position After approximately 10 seconds the audible alarm will begin to sound and when the pressure reaches 2 5 0 2kgf cm the safety relief valve on the compressor w ll make an air release sound This means the valve is working correctly MERITS HEALTH PRODUCTS CO LTD 4 4 v Set the ON OFF switch to the OFF position and unplug the power cord vi Reconnect the intake solenoid c
29. nd water which create bubbles in the presence of a leak A solution of one teaspoon of liquid soap per quart of water is sufficient i Uncoil the power cord completely from its holder before use and plug in the unit li Set the unit s ON OFF switch to the ON position and turn on the flow meter set 5 LPM Allow the unit to run for approximately three minutes 11 Remove the cabinet See section 4 2 1 iv In the compressor compartment apply the solution to the heat exchanger connections and fittings on the compressor v On the back and front side apply the solution to the Regulator Solenoid Valve fittings Sieve Bed fittings Flow Meter and Bacteria Filter Note When you leak test be sure to wipe off any excess water and protect all electrical components from the solution MERITS HEALTH PRODUCTS CO LTD A 16 r merits Q155 Service Manual 5 Maintenance 5 1 Routine Maintenance The Merits unit has two filters that require scheduled maintenance and replacement In addition you must perform a test of purity concentration on the unit at least every 90 days Merits do not require preventative maintenance on the compressor You do not need to perform any compressor maintenance as long as the merits unit remains within specifications at the desired flow rate 5 2 Cabinet Air Inlet Filter The cabinet air inlet filter is located at the cabinet aside See Figure 5 1 You can easily remove it by hand Note The filter ma
30. ndle the new oxygen sensor board only by the edges to prevent electro static damage to the unit 4 6 4 Oxygen Sensor Circuit Board Installation i Install the oxygen sensor circuit board on the supports ii Firmly plug in the wire connector to the oxygen sensor circuit board iii Firmly plug in the tubing to the oxygen sensor circuit board iv Reconnect the cabinet 4 7 Product Regulator Setting and Replacement The product regulator enables you to set the pressure of oxygen output by the Merits unit To check for proper adjustment of the product regulator take the following Steps 1 Set the unit s ON OFF switch to the OFF position and unplug the power cord il Remove the cabinet See section 4 2 1 i Plug the power cord set the ON OFF switch to the ON position iv Run the unit for three minutes v Turn the flow meter adjustment knob set at 5 LPM vi Connect pressure gauge or manometer at the oxygen outlet See Figure 4 15 vii Rotate the regulator knob on valve set to the 6 0 0 6psi See Figure 4 16 viii Install the cabinet MERITS HEALTH PRODUCTS CO LTD 4 9 Pressure gauge sure 4 15 Output pressure detect Regulator Figure 4 16 Pressure regulator 4 8 Circuit Breaker Replacement 4 8 1 Circuit Breaker Removal i Set the unit s ON OFF switch to the OFF position and unplug the power cord ii Remove the cabinet and control panel inside See section 4 2 1 i Disconnect the circuit breaker leads
31. ng Pressure Higher than normal operating pressure may indicate any of the following D Arestrictive blow down muffler which does not allow the waste purge gas to exit the system freely Operate the unit with the blow down muffler disconnected to see if the operating pressure returns to normal D An improperly operating circuit board or solenoid valve Confirm that the circuit board and solenoid valves function properly N Contaminated sieve beds Change the sieve beds 4 16 Low Operating Pressure Lower than normal operating pressure may indicate any of the following N A restriction in the suction resonator which 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 D An improperly operating circuit board or solenoid valve Confirm that the circuit board and solenoid valves function properly D A leak in the unit which allows system pressure to escape Leak test the unit See section 4 17 D A compressor with reduced output Ensure that the purity level at the desired liter flow is within Merits specifications If it is below specifications replace MERITS HEALTH PRODUCTS CO LTD 4 15 db Fil or repair the compressor 4 17 Leak Test Procedure When you service the Pioneer unit thoroughly leak test as outlined below Use a leak indicating solution or liquid soap a
32. ntrator MERITS HEALTH PRODUCTS CO LTD 35 db al Hand Grip Flowmeter Flow Adjustment Knob Oxygen Purity Indicator Lights iL Power Switch Circuit Breaker Oxygen Outlet A ji De Du N L Pr Electrical Specification Label Operating Instruction Label amp Warning Label Serial Number Label Figure 3 2 Cabinet 3 3 Handling 3 3 1 Select a location Select a location where s des and bottom are unobstructed to ensure proper airflow Be sure that the machine is placed away from drapes or other objects that might block the flow of incoming air and or alarm indicators The area should be free of pollutants or dangerous fumes The unit should be placed on a stable level surface The location should have access to a power outlet without use of an extension cord or where the cord is placed across a traffic area Do not place near a source or heat or open flame or hot sparking objects 3 3 2 Plug in power cord Plug the power cord into a grounded 15 AMP power outlet See Figure 3 3 Power f Outlet Figure 3 3 Power Cord MERITS HEALTH PRODUCTS CO LTD Se Cabinet Filter Cabinet Filter Hol Air Exhaust Vent dh al 3 3 3 Connect humidifier if prescribed by your physician Fill the humidifier with distilled water according to the manufacturer s instructions See Figure 3 4 Do not overfill Replace the cab and securely tighten Place the humidifier in the humidifier comp
33. oil terminals of solenoid valve vii Install the cabinet The procedure to replace the compressor safety relief valve is as following 1 Follow section 4 4 2 to remove compressor 11 To loose the relief valve by using wrench See Figure 4 9 i To wind around type seal on the thread of new relief valve iv Install new relief valve Figure 4 9 Loose relief valve 4 4 4 Capacitor Replacement The capacitor helps to start the compressor If the compressor does not start when the power is switched on the capacitor may be defective and require replacement Please follow below steps to replace the capacitor 1 Set the unit s ON OFF switch to OFF position and unplug the power cord 11 Remove the cabinet See 4 2 1 111 Disconnect the two lead wires to the capacitor See Figure 4 8 and cut the tie straps holding capacitor to another side of central frame See Figure 4 10 iv To install the new capacitor connect the leads to new capacitor then fasten the capacitor with new tie straps The capacitor of compressor Figure 4 10 The capacitor of compressor MERITS HEALTH PRODUCTS CO LTD 4 5 Jt i 4 5 Axial Fan Replacement The intake axial fan for the unit is located aside of central frame and base assembly See Figure 4 11 Refer to the troubleshooting chart in Section 4 0 of this manual for instances where replacement of the fan may be required To replace the intake axial fan in central frame take the follo
34. performance N Different personnel to prevent cross infection should never use the same mask or cannula 1 4 Warranty Merits Health Products Co Ltd warrants the Oxygen Concentrator to be free from detect in general parts for a period of 5 years from the date of purchase excluding the parts which warranty are specified on Table 1 1 Please tell your customer for more details This warranty is limited to the original purchaser of the Oxygen Concentrator Any defective part or assembly will be repaired or replaced at the sole discretion and determination of Merits Health Products Co Ltd 1f the unit has been properly operated during the warranty period Normal maintenance items and disposable components see Table 1 2 are not covered by this warranty Shipping charges if any shall be paid by the purchaser Note There is no other express warranty Implied warranties including those of merchantability and fitness for a particular purpose are limited to the duration of the express limited warranty and to the extent permitted by law and all implied warranties are excluded This warranty does not cover providing a loaner Oxygen Concentrator compensating for costs incurred for Oxygen Concentrator rental or labor costs incurred in repairing or replacing defective part s Component Part Number Warranty Period Note Compressor 4 S01 10 000 hour Molecular Sieve 2 22 l year Table 1 1 List of specified warranty period components Component P
35. power connector to the circuit board vii Reinstall the cabinet Compressor power connector Figure 3 7 Compressor power connector 3 4 3 High Pressure Alarm Test To test the High pressure alarm system 1 Set the ON OFF switch to the OFF position and unplug the power cord ii Remove the cabinet and disconnect the intake solenoid coil terminals of solenoid valve See Figure 3 8 i Plug in the unit and set the ON OFF switch to the ON position iv When the pressure is above 2 2 0 2kgf cm the audible alarm should be three short beep long pause and repeat this cycle v Set the ON OFF switch to the OFF position and unplug the power cord vi Reconnect the intake solenoid coil terminal vii Reinstall the cabinet MERITS HEALTH PRODUCTS CO LTD 3 6 Figure 3 8 Intake solenoid coil and terminal 3 4 4 Overheating Alarm Test To test the overheating alarm i Set the ON OFF switch to the OFF position and unplug the power cord 11 Remove the cabinet i Plug in the unit and set the ON OFF switch to the ON position iv Use dryer to heat the temperature sensor See Figure 3 9 v When temperature is higher than 60 C alarm system will start the audible alarm up vi Reinstall the cabinet Temperature sensor Figure 3 9 Temperature sensor MERITS HEALTH PRODUCTS CO LTD 7 Jemeribe e merits Q155 Service Manual 4 Service 4 1 Components The internal composition of the Merits Oxygen Concentr
36. ric or any other patients unable to communicate discomfort while using this concentrator may need additional monitoring under physicians or medical professionals N Children may need pediatric flowmeter to use with this concentrator consult your physician before usage 1 3 2 Precaution D Always plug ina 15 AMP grounded circuit DO NOT USE AN EXTENSION CORD n Place the unit where sides and bottom are unobstructed to ensure proper airflow Be sure that the machine is placed away from drapes or other objects that might block the flow of incoming air and or alarm indicators N Only operate the concentrator in an upright position D Do not use oxygen tubing that exceeds 50 feet in length The manufacturer recommends crush resistant tubing N Do not place liquids on the unit or use liquids to clean the unit Do not use petroleum based solvents Clean unit and power cord with mild household MERITS HEALTH PRODUCTS CO LTD 1 2 dh H cleaner applied with a damp cloth or sponge then wipe dry n The Salter Labs 7100 350c c Bubble Humidifier and the B amp F Medical Bubble Humidifier are suitable for use with the Oxygen Concentrators Or a humidifier capable of 30 psi operation and 15 LPM of flow is required Use of certain humidifiers not specified for use with this oxygen concentrator may impair the performance n Always choose the FDA or CE approved accessories such as Masks or cannulas amp Humidifiers to ensure the reliability and
37. signed to be highly reliable systems while maintaining cost effective operation Since Merits is ISO 13485 and FDA QSR system approved we have pledged to build only products designed for unmatched reliability and endurance Subsequently we are confident that our systems will deliver the necessary consistent concentrated oxygen and flow rate as ordered by your attending physician Smart monitoring and security control systems allow for constant awareness of possible failures and or malfunctions The advanced technology utilized by Merits ensures that the patient will always be alerted with audio and visual alarm systems 1 1 Intended Use The Merits Oxygen Concentrator is intended to be used to supply supplemental oxygen to patients in their home The devices are not intended for life support nor do they provide any patient monitoring capabilities Caution Federal Law restricts this device to sale by or on the order of a physician Caution Do not adjust your prescribed level of oxygen flow without consulting your physician 1 2 How to Use Service Manual This manual provides instruction for service engineer only to service the Merits Q155 Oxygen Concentrator This manual includes whole sections in the following Introduction Patient Instructions Operation Service Maintenance 2 J a 3 J J3 Troubleshooting All section titles subject subtitles and illustration are listed in the Table of Contents Note This manual specifically
38. ty oxygen monitor board Replace faulty regulator or reset the regulator Replace faulty solenoid valve Replace faulty relief valve Replace or repair faulty compressor Replace sieve bed Control room temperature below 35 C Replace or clean exhaust muffler Clean foam filter or replace Check the intake filter or replace it Check all the tubes from the exhaust of air compressor down to the oxygen outlet or Replace the related faulty tubes 6 1 J merits SYMPTON Compressor does not run when power switch ON Compressor shut down intermittently when power switch ON Circuit breaker trips repeatedly when power switch ON Buzzer not sound Flow rate unstable Cooling fan does not working Low flow rate PROBABLE CAUSE Power loss Faulty circuit board Faulty electrical connections Faulty compressor Faulty capacitor Faulty electrical connections Faulty capacitor Faulty Cooling Fan Faulty temperature sensor Faulty circuit board Faulty compressor Faulty circuit breaker Faulty circuit board Faulty electrical connections Faulty buzzer Faulty circuit board Faulty regulator Faulty solenoid valve Faulty sieve bed Leaking Defective electrical Connections Defective Cooling fan Restriction in air passages Leaking Faulty or loosened regulator Faulty solenoid valve Relief valve release on air Compressor flow rate not enough Q155 Service Manual SOLUTION Refer
39. wing steps 1 Set the unit s ON OFF switch to the OFF position and unplug the power cord 11 Remove the cabinet See section 4 2 1 i Disconnect the fan wire connector See Figure 4 11 iv Remove the screws and nuts on axial fan from central frame See Figure 4 11 v Install new intake axial fan to central frame and tighten the screws vi Connect the fan wire connector vil Reassemble the cabinet The fan wire connector The fan fixed SCrews Figure 4 11 Intake axial fan To replace the exhaust axial fan in the base assembly take the following steps L Set the unit s ON OFF switch to the OFF position and unplug the power cord 11 Remove the cabinet See section 4 2 1 i Disconnect the fan wire connector See Figure 4 11 iv Follow section 4 4 2 to remove compressor v Disconnect the exhaust axial fan wire connector vi Loose the four screws on exhaust axial fan to remove it See Figure 4 12 The exhaust fan wire connector Figure 4 12 Exhaust axial fan MERITS HEALTH PRODUCTS CO LTD 4 6 dh H 4 6 Circuit Board Replacement Caution The Printed Circuit Boards PCBs contain components that are sensitive to electrostatic discharge ESD and 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 n Handle the PCB by the edges only D Work on a grounded ESD mat N Wear a grounded wrist
40. with a solution of 10 parts water and 1 part vinegar i Rinse again with hot water and refill with distilled water to the level shown on the humidifier MERITS HEALTH PRODUCTS CO LTD Bi EM Jt meril 3 Operation 3 1 Description of Operation Figure 3 1 shows the normal airflow route of Merits Oxygen Concentrator First air is drawn into the cabinet through the intake filter and muffler which helps quiet the compressor s intake sound Then Air enters compressor and is pressurized in the compressor Pressurized air then passes through a heat exchanger which reduces the temperature of the compressed air Next the solenoid valve developed by Merits direct compressed air into Unit Block solenoid valve sieve bed lt 2 oxygen tank air pipe that contain molecular sieve The property of molecular sieve material is that it is able to adsorb nitrogen and allow oxygen pass when air passes through this material thus producing high purity oxygen There are two sieve beds in Unit Block While one allows high purity oxygen to pass the other is purged of the nitrogen it adsorbed while it made oxygen Each sieve bed delivers its oxygen to the oxygen tank of Unit Block Oxygen exits this product tank through a pressure controlling regulator flow meter and final bacteria filter The Pioneer unit delivers up to 9343 pure oxygen at flow rates from 1 5 LPM AIR IN F INTAKE FILTER l M L Le INTAKE MUFFLER
41. y require daily cleaning if the Pioneer unit operates in a harsh environment such as a house heated by wood kerosene or oil or one with excessive cooking or cigarette smoke Figure 5 1 Cabinet air inlet filter 5 3 Air Intake Fine Particle Filter The particle filter replaced about every three months if unit always run 1 Set the unit s ON OFF switch to the OFF position and unplug the power cord ii Remove the maintenance door i Remove old particle filter and install new one iv Install maintenance door MERITS HEALTH PRODUCTS CO LTD 5 1 Air intake fine particle filter Figure 5 2 Air intake fine particle filter 5 4 Bacteria Filter Replacement The bacteria filter must be replaced after every 10 000 hours of use i Remove the cabinet and control panel See section 4 2 1 li Separate the tubing from both sides of the filter attached at control panel See Figure 5 3 i Install the new filter with the inlet side in the same position as before Push the tubing together so that the tubing overlaps the bacteria filter connections iv Record information about the bacteria filter replacement on the History Record card v Install the control panel and the cabinet Bacteria filter Figure 5 3 Bacteria filter MERITS HEALTH PRODUCTS CO LTD 5 2 J merits 6 Troubleshooting SYMPTON Power Loss while power switch ON Over Heating alarm High Pressure alarm Low Pressure alarm Low Oxygen
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