PA90 SERIES
Contents
1. Do not use oxygen enriched air Two stage apparatus will accept 200bar or 300bar nominal cylinders without modification to the cylinder connector or gauge The effective duration of two stage apparatus is dependent on a Cylinder type and capacity chosen b Rate of work Drager Limited Purpose Description PA90 Series PA92 PAQ2 is a self contained unit for use in non respirable atmospheres Basic configuration consists of 4 4 oe Composite Backplate Standard Harness Pressure Reducerand Hose Assembly Various cylinder connections available Cylinder Contents Pressure Gauge Whistle Warning Unit PA 92 Equipment Layout Backplate Pneumatics and Harness Assembly Demand Valve various Facepiece various Valved Cylinder various To complete PA92 various combinations of Panorama Nova Facepieces Lung Governed Demand Valves Positive Pressure or Normal Demand and Compressed Air Valved Cylinders are available Refer to Technical Data Page 8 and Order List Page 20 AG Purpose Description PA90 Series PA93 PAQ3 is a self contained unit for use in non Whistle Warning Unit respirable atmospheres Basic configuration consists of 4 To complete PA93 various combinations of Panorama Nova Facepieces Lung Governed Composite Backplate Demand Valves Positive Pressure or Normal Professional Harness Plastic Buckles Demand and Compressed Air Valved Pressure Re2. OFF Positive pressure Remove facepiece Close cylinder valve Unfasten waistbelt by opening safety clip 4 Loosen shoulder harness straps by lifting both buckles remove apparatus carefully Do not drop or throw down as serious damage could occur to apparatus Removal of Cylinder Do not attempt to remove cylinder unless cylinder valve is fully closed and system has been vented by pressing centre of protective cap on demand valve When vented reset positive pressure type demand valve by pressing lever towards front cover Fig 5 To remove cylinder lift and pull free end of cylinder retaining strap to release camlock mechanism loosen strap unhookanti vibration strap if fitted and unscrew pressure reducer hand wheel from cylinder valve anti clockwise Visual Inspection and Check Check integrity of following after use a All straps and harness b Facepiece c Valves d Connectors e Cylinder supports Above checks and monthly checks listed on Page 18 should be carried out after use See also Routine Maintenance Routine Maintenance To be performed whenever apparatus has been used together with monthly tests on Page 18 Charging of cylinders Recharge cylinder to appropriate pressure as stamped on cylinder It is only permissible to fill compressed air cylinders which a Conform to National Standards in force within country of use b Are stamped with test date and test mark of in
3. Reporting of Injuries Diseases and Dangerous Occurrences Regulations 1985 RIDDOR AY Statutory Requirements In the United Kingdom the requirements of the Control of Substances Hazardous to Health Regulations COSHH governing the use of Respiratory Protective Equipment RPE shouid be observed Outside the United Kingdom the relevant regulations governing the use of RPE should be observed and adhered to in the country of use Important Information Compressed gas by its very nature is a means of storing a high quantity of energy in a small containad volume and due to the high concentration the container whether it be a compressed air cylinder or an airline flexible hose is a potential hazard Risks from this potential hazard can be minimised providing care is exercised in the operation and handling of compressed gas equipment and components This apparatus is only intended for the purposes specified in these Instructionsfor Useorforthepurpose confirmed in writing by Draeger Limited 2 For safety reasons pressure reducers should be overhauled at the stated interval Pressure reducers of certified apparatus are sealed by Draeger If original seal cap has been broken or removed apparatusis not as being operational inaccordance with approval standards For authorised maintenance to be carried out and therefore full operational state to be achieved Draeger can only be liable if pressure reducer is serviced and
4. re sealed by Draeger This is only the case when pressure reducers are fitted with original Draeger components and sealing caps 3 Compressed air is not to be directed onto any surface of the human body lf compressed air is used for cleaning or removal of contaminants from components then suitable personal protection equipment should be worn i e industrial gloves safety glasses visor etc 4 All adjustable connections must be securelytightenedusingtheappropriate tools and inspected at regular intervals for wear 5 The cylinder valve must be fully closed and all pressure in the system vented before removal of any component from apparatus 6 Test gauges must be calibrated once a year 7 Compressed gas containers cylinders must be free from external damage and must only be used if they are within the stipulated test period Cylinders should only be pressurised in accordance with the charging instructions described under Routine Maintenance 8 Component parts which are recommended for replacement at regular intervals must be replaced regardless of visual condition and only original Draeger Spare Parts used 9 With reference to air quality for breathing systems guidance should be sought from EN132 1990 a Impurities e g dust dirt metallic particles or any other toxic or irritant substances should be kept to a minimum but in any case should not exceed the maximum permissible exposure level Warning
5. repaired by personnel not employed or authorised by Drager Service or when this apparatus has been used in a manner not conforming to its intended use Drager Limited cannot be held responsible for any damage caused by non compliance with the above recommendations The warranty and liability provisions of the terms and conditions of sale and delivery of Drager Limited are likewise not modified by recommendations given above Maintenance This apparatus must be inspected 1 and serviced 2 by experts at regular intervals and a record maintained of such inspections and servicing Repairs 3 and general overhaul of this apparatus should only be carried out by fully trained and expert personnel We recommend that a service contract is obtained from Dr ger Service Department and that all repairs are also carried out by them Only original Drager Spare Parts should be used for maintenance 4 Observe chapters Routine Maintenance and Test Intervals Inspection examination of actual condition 2 Service measures to be taken to maintain desired condition 3 Repair measures to be taken to restore desired condition 4 Maintenance inspection service and if applicable repair Product Faults In the event of any component fault or malfunction Drager should be notified Inthe United Kingdom it may also be necessary to contact the Health and Safety Executive HSE with due regard paidto the requirements of the
6. 6 French Standard Italian Standard Japanese Standard Push In M45 x 3 Thread 40mm Thread 620mrn 320mm 150mm 3 0kg less cylinder Twin 4L capacity 200 and 300bar cylinders are also available for further details contact Drager Customer Services Note If is advised that 12L cylinder should not be used in areas with restricted entry and exit Note Connecting Y piece for Twin Cylinders See Order List Page 22 Effective duration in minutes is calculated for moderately heavy work rates airconsumptionapproximately 40 L min e g Whistle Warning Unit nominally set at 50bar Ask for details Whistle Adjustment Whistle Adjustment Slacken lock nut 1 To increase whistle setting turn adjusting nut 2 clockwise To decrease whistle setting turn adjusting nut anti clockwise When desired setting has been reached tighten lock nut Recheck as stated on pages 10 or 12 49 Preparation for Use Fitting compressed air cylinder Fully open cylinder support strap on backplate Checkcylindervalveinletandpressure reducer threads are not damaged and sealing O ring is in position and not damaged With apparatus in horizontal position slidecylinderthroughcylindersupport strap from top of backplate towards cylinder connector on pressure reducer and locate valve port to pressure reducer handwheel Fig 1 Lift complete unit into upright position and screw handwheel on pressure reducer into c
7. Drager PA90 SERIES Compressed Air Respiratory Protection Equipment Instructions for Use The self contained open circuit respiratory protection equipment referred to in this manual conforms to EN137 and has been issued with Certificate of Assurance Number SH BA 69 CONTENTS Page Page For Your Safety 3 Cleaning 14 15 important Information 4 Conversion to Twin Cylinder 16 Purpose Description PA92 5 Fault Cause Remedy 17 Purpose Description PA93 6 Testing the Apparatus 17 Purpose Description PA94 7 Maintenance and Technical Data 8 Test Intervals 16 Preparations for Use 9 10 Storage 19 Operation 11 12 Order List 20 22 Use 12 Spare Parts List 23 After Use 13 Routine Maintenance 13 16 Drager Limited while endeavouring to ensure Note the correctness of statements of fact and advice contained in this publication gives no guarantee or warranty in respect thereof and accepts no liability for any misstatement or inaccuracy in publication or for any omission therefrom This manual describes the operating procedure for PA90 Series Two Stage LP Compressed Air Respiratory Protection Equipment with 200 or 300 bar supply pressure 33 39960 GA1284 00 e 90 20 306 FOR YOUR SAFETY For correct and effective use of this apparatus and to avoid hazards it is essential to read the following recommendations and to act accordingly Recommendations Strictly follow these Instructions for Use Any use of this apparatus
8. Storage Ensure that shoulder straps and waistbelt arefully extended Fold harnessstrapstogether on carrying frame fold waistbelt over harness straps Fig 18 Store set ready for use in a cool dry environment free from dust and dirt Rubber parts are to be protected from direct sunlight If unit is stored available for use on wall or bulkhead mounting e g Fire Tender ensure that unit is held and supported by cylinder and not backplate of unit Fig 18 Order List Designation and Description Standard Harness G5 8 DIN Connection Standard Harness Italian Connection Standard Harness French Connection Standard Harness JIS Connection Professional Harness Plastic Buckles G5 8 DIN Connection Professional Harness Italian Connection Professional Harness French Connection Professional Harness JIS Connection Professional Harness Metal Buckles G5 8 DIN Connection only Order List PA90 Series A Push in Connection Positive Pressure Order Designation and Description Code Demand Valve A 33 39400 Panorama Nova Facepiece A Neoprene R 52972 Panorama Nova Facepiece A Neoprene Acrylic Visor R 50092 Panorama Nova Facepiece A Silicone R 53070 PA90 Series AE M45 Screw In Positive Pressure Demand Valve AE Panorama Nova Facepiece AE Neoprene Panorama Nova Facepiece AE Silicone Va
9. ad into groove in demand valve body Fig 1 3 note orientation Re fit bayonet cap clockwise rotation Moisten lip of bayonet cap with water prior to fitting to prevent rotation of diaphragm Re check position of diaphragm Fig 14 Assemble rubber protective cover Activate demand valve by pressing centre of front cover to blow out any fluid residue Switch off air supply Carry out function checks Page 11 Fig 13 Fig 14 Pressure Reducer Assembly Important Refer to Important Information Page 4 Paragraph Should it be necessary to remove pressure reducer and hose assembly from backplate for cleaning and or disinfection follow these instructions Note Do not immerse pressure reducer in water or disinfectant solution Use moistened Wipex Cloths and Hose Removing Pressure Reducer Fig 15 4 Unfasten hose loop buckles on shoulder pads and backplate to release hoses 4 Unscrew hexagon lock nut remove socket head screw and washers to release pressure reducer Remove mounting pin from reducer andplasticsieevefrom holeinmounting pin Reducer and Hose Assembly can now be cleaned and disinfected See note above Re assembly of Pressure Reducer 4 insert plastic sleeve into hole in mounting pin then pin into reducer Locate round end of mounting pin into slot in bracket and square end into plastic mounting bracket Insert socket head screw with washers through mounting b
10. ast one Serial Number by Draeger these Instructions for Use are provided for general information only and are not to be used with a specific apparatus Drager Limited Ullswater Close Kitty Brewster Estate Blyth Northumberland NE24 4RG Tel 0670 352891 Telex 53394 Fax 0670 361732 Breathing Apparatus and Accessories Fax 0670 355193 Spare Wear and Tear Parts 23 33 39960 GA 1284 00fe 90 20 306 2nd Fdition September 1992 Subject to Modifications
11. bling Demand Valve to facepiece Units found to be binding should be taken out of service and advice sought from Draeger AVIA Operation Putting on apparatus 4 Put on apparatus with shoulder straps and waistbelt fully extended Fasten waistbelt buckle Fig 8 and secure waistbelt to hips by pulling loose ends of waistbelt away from buckle until apparatus sits securely and comfortably in place Fig 9 Tuck loose ends of waistbelt through waistbelt loops Pull down shoulder straps Fig 10 until apparatus feels comfortable Feed loose ends of straps between waistbelt pad and straps Fit neckstrap of facepiece over neck and attach demand valve to facepiece Refer to instructions on Page 10 Make sure that positive pressure type demand valve is switched to positive pressure OFF mode and Open cylinder valve slowly but fully to pressurise system Check system pressure on gauge Put facepiece on as follows a Spread out straps leaving centre strap in position shown in Fig 1 1 Only adjust strap if necessary b Place chin into facepiece Place straps over head Tighten lower straps then upper straps by pulling them towards back of head Do not over tighten Correct fit of facepiece is only ensured if facepiece seal makes close contact with the skin Care should be taken to ensure that no facial hair beard stubble side whiskers or similar interfere with facepiece seal Spectacle wearers will have pr
12. bly through cylinder support strap and locate Y piece port to pressure reducer hand wheel Lift unit into upright position and screw hand wheel on pressure reducer into Y piece port hand tight only Fig 1 7 Place unit into horizontal position Align cylinders centrally on backplate and tighten handtight handwheels into each cylinder and Y piece port hook anti vibration strap to each hand wheel Adjust cylinder retaining strap by taking up slack then activate camlock mechanism by pulling end of strapback over cylinders Locate end of strap in retaining clip Carry out Operation and Functional Tests as described earlier Fig 17 FAULT CAUSE REMEDY Faulty or missing sealing O ring for Plug In connection Facepiece leakage Leak Test with apparatus In position Unsatisfactory communication High pressure leak Safety relief valve venting Demand valve vents constant flow Whistle does not sound correctly Testing the apparatus Exhalation valve leakage Speech diaphragm defective Head straps not tight Speech diaphragm defective Check tightness of connections Whistle continuously in operation Pressure reducer defective Banjo O rings worn Balanced piston leakage Diaphragm fitted incorrectly Setting has changed Whistle dirty The equipment should be tested as stated in the relevant Instructions for Use with apparatus listed below and or by ref
13. ducerand Hose Assembly Cylinders are available Various cylinder connections Refer to Technical Data Page 8 and Order available List Paog 20 Cylinder Contents Pressure Gauge PA 93 Equipment Layout Backplate Pneumatics and Harness Assembly Basic Unit Demand Vale various Facepiece various Valved Cylinder various Ad Purpose Description PA90 Series PA94 PA94 is a self contained unit for use in Whistle Warning Unit non respirable atmospheres To complete PA94 various combinations of Basic configuration consists of Panorama Nova Facepieces Lung Governed e Composite Backplate Demand Valves Positive Pressure and Normal Professional Harness Metal Shoulder Demand and Compressed AirValved Cylinders Buckles are available e Pressure Reducerand Hose Assembly Refer to Technical Data Page 8 and Order G5 8 DIN cylinder connection List Page20 Cylinder Contents Pressure Gauge Equipment Layout Backplate Pneumatics and Harness Assembly Basic Unit Demand Valve various Facepiece various Valved Cylinder various Af Technical Rata PA90 Series High Pressure Connection Standard Other connections available Facepiece and Demand Valve Connections PAQOA PASOAE PAQON Dimensions Length Width Height Weight of Apparatus Single cylinders are available from 6L to t2L in steel and or composite materials pressure fill 200 or 300bar G5 8 as per DIN 477 Part
14. erence to appropriate Service Manual Test Equipment required Refer to Drager Service Manual Fit or replace sealing O ring Clean and replace exhalation valve Replace as required Replace as required Tighten straps Replace as required Tighten as required Clean and reset Return to Draeger Service Replace as required Replace as required Check position refer to manual Clean and reset as required Maintenance and Test Intervals In addition to work outlined under Routine Maintenance which is to be performed whenever apparatus has been used regular testing and servicing intervals are to be complied with in accordance with this table This also applies to non used in storage apparatus Draeger Recommendation COSHH Grease O ring Molykote 111 as required After Use Complete Cleaning Apparatus Visual Checks Functional and Leak Testing elfo Flow and or Static Test according to National Standards Lung Cleaning as necessary Governed Visual check of Diaphragm Every year Poy OVO a a a paee OT TE ES FC EE E Demand Val ae and Lever Assembly Pressure Medium Pressure Check Reducer Sintered Filter Change Basic Overhaul Replace HP Sealing O Ring Cylinder Charging Charged Pressure Check Safety Pressure Test according to National Standards Cylinder Basic Overhaul when Valve necessary 18 Every 5 years
15. essure gauge hose over left shoulder strap tie hose loops and snap plastic shroud on gauge hose into securing clip Demand Valve Maintenance Note Disconnect Demand Valve from apparatus before commencing dis assembly Replacing diaphragm Note Depress reset lever Fig 5 for Type A and AE Remove rubber protective cover and bayonet cap Carefully remove diaphragm by unhooking its centre location from balanced piston lever 4 Relocate new diaphragm onto balanced piston lever Fig 12 and locate diaphragm outer bead into groove in demand valve body Fig 13 note orientation Refit bayonet cap check position of diaphragm Fig 14 Fit rubber protective cover Carry out operational and function tests Conversion to Twin Cylinder Unit PA90 Series compressed air respiratory protection equipment can also be adapted for use as a twin cylinder 2x4L unit by fitting a Y piece connector See Technical Data Page 8 and Order List Page 22 To convert to standard G 518 DIN 477 thread twin cylinder operation follow these instructions Ensure all connection threads on pressure reducer Y piece and cylinder valves are free from damage and that sealing O rings are in position and undamaged Connect both cylinders to Y piece Fig 16 do not tighten Fully open cylinder support strap on backplate With apparatus in horizontal position slide twincylinder Y piece assem
16. lved Cylinders An extensive range of valved cylinders are available to suit all user requirements including composite materials For further details contact Drager Customer Services Department 21 Zi Order List Accessories ae Order Designation and Description Connecting Piece Y Piece for two cylinder 2 x 4 L 200bar R 50675 G5 8 DIN Connection only Miscellaneous Wipex Cloths Pack of 50 33 80375 1 Litre Safety Wash and Dispenser 33 80164 1 Litre Safety Wash Refill 33 80165 5 Litre Safety Wash and Dispenser 33 80166 5 Litre Safety Wash Refill 33 80167 Note The following are recommended for use water and liquid soap e g EW 80 Firma Tremonia Chemie Kernebachstr 95 D 6400 Dortmund 1 Incidur Firma Henkel KGaA Henkelstr 67 D 4000 Dusseldorf 13 Tegodor F Firma Goldschmidt AG Goldschmidtstr 100 D 4300 Essen 1 Spare Parts List PA90 Series Compressed Air Respiratory Protection Equipment Basic Units PA92 E 1284 0 PA93 PA94 PA90 Series Pneumatic Arrangement PAS90 Series Pressure Reducers PA90 Series Two Stage Lung Governed Demand Valves PA90A PA90AE PASON Notes These Instructions for Use apply only to PA90 Series with Serial Numbers PressureReducer BRE H 000 2 AEE E EE EA eee DeMANndValW eC isiiiiceiseecsciscieccssecssevcccescactveueetsccneebacecsnnsntwesadsececacedacedeestedisecstateaeass Without entry of at le
17. oblems achieving a complete seal ao On achieving face seal positive pressure type demand valves will activate automatically on first inhalation Breathe normally Fig 9 Fig 10 Fig 11 Function Checks Check functioning of demand and exhalation valves by breathing deeply several times Hold breath unit should be balanced i e no audible leak Continue breathing it must be possible for expired air to flow easily out of exhalation valve Check function of supplementary supply by pressing centre of protective cap Note For those user s who have followed the procedures as written refer to Pages 9 and 10 e have tested whistle warning unit before fitting facepiece to demand valve whistle warning test described here may be omitted Close cylinder valve Vent system by breathing normally and check that whistle warning unit sounds at correct pressure Continue breathing until system has fully vented facepiece should hold onto face this indicates a positive face seal Open cylinder valve and breathe normally Use Take pressure gauge readings from time to time whilst using apparatus Whistlewarningunit soundsoncecompressed air supply has reached WWU pressure setting Start escaping before whistle sounds ATTENTION As regards escape time required for approach is to be observed in addition to retreat time indicated by warning signal A17 After Use Switch
18. pplementary supply activation Observe pressure gauge Whistle warning unit should sound at pre set pressure Ifwhistledoesnotsoundat appropriate pressure reset whistle as per instruction on Page 8 4 Following above check de activate dernand valve positive pressure by pressing lever towards front cover Fig 5 Connection of demand valve to facepiece Push In Type A 4 Ensure facepiece port and O ring on demand valve are free from dirt and damage Push demand valve into facepiece port until it clicks into position 4 Check attachment is secure by pulling demand valve away from facepiece there should be no axial movement Connection of demand valve to facepiece Screw In Type AE and N Use thumbs to screw in handwheel until thread bites into facepiece port Align demand valve vertically with centre line of facepiece Fig 7 and tighten Warning For Lung Governed Demand Valves with threaded swivel connection it may be possible for clearance between Demand Valve handwheet and retainer to be reduced due to contamination which could result in handwheel binding with retainer thus impairing swivel action of handwheel This could give the user the false impression that Demand Valve is correctly and fully screwed into Facepiece port when in fact it is nat To check correct function of units in service ensure handwheelon Demand Valve spins freely This should be done at all times prior to assem
19. racket and mounting pincross hole securing with locking nut 4 Secure hoses to backplate and shoulder pads using hose loops Shoulder Harness and Waistbelt Should it be necessary to remove shoulder harness and waistbelt from backplate for decontamination or cleaning follow these instructions for Professional Harness Removing Shoulder Harness 4 Loosen hose loop buckles on both shoulder pads to free demand valve and gauge hoses 4 Loosen shoulder strap 2 buckles 4 PA93 Align and push inner retaining buckles through slots in top of backplate 4 293 Align and push lower strap retaining buckles 2 through slots in base of backplate 4 Apply pressure tocentre of shoulder strap locking plate and rotate 90 degrees and remove harness assembly from slot in backptate Removina_ Waistbell Align and push waistbelt retaining buckles 2 through slots in backplate Apply pressureto centre of waistbelt pad rotating assembly through 90 degrees and remove from slot in backplate Waistbelt can only be removed or assembled one way a PA94 Shoulder Harness and Waistbelt remain as assembly afte removal from backplate b After cleaning dry shoulder harness and waistbelt at a temperature not exceeding 60 degrees Celsius Refitting of harness Re fit shoulder harness then waistbelt to backplate reverse of above instructions Fit CEJN hose LP Demand Valve Hose over right shoulder strap and tie hose loop Fit pr
20. requires a full understanding and strict observation of these instructions This apparatus is only to be used for purposes specified here Intended Use PA90 Series compressed air respiratory protection equipment can only be used in conjunction with those cylinder combinations in the United Kingdom covered by the Certificate of Approval or by national standards in force in the country of use For information on these combinations please contact Drager Customer Services The cylinder demand valve and facepiece should be correctly assembled totheset togivemaximumrespfratory protection against harmful gases vapours and particulate matter It is recommended that the cylinder demand valve and facepiece are fitted to equipment in a clean area i e a BA workshop If it is necessary to change these components at an incident suitable precautions must be taken to avoid contamination In the United Kingdom guidance on the level of protection for Compressed Air Respiratory Protection Equipment products can be found in the Health and Safety Executive publication HS G 53 Respiratory Protective Equipment a practical guide for users Alsothe Controlof Substances Hazardous to Health COSHH regulations and recommendations apply to the above equipment Liability for proper function or damage Liability for proper function of this apparatus is irrevocably transferred to the owner or operator to the extent that the apparatus has been serviced or
21. spection authority c Have not exceeded test interval indicated on cylinder d Do not show signs of damage or corrosion which could be a potential hazard and that cylinder is in good condition e Do not show any signs of moisture waterdroplets inthreadedconnection Note Observe the following so as to avoid high water content of breathing air in compressed air cylinder Compressed air cylinders must not becompletelyemptied de pressurised when used with compressed air respiratory protection equipment Maintain above atmospheric pressure after use If however cylinder is completely emptied ensure that cylinder valve is closed Cylinder valve outlet should be protected against ingress of dirt and moisture at all times i e after removal from compressed air respiratory protectionequipment andfitprotective cap immediately after recharging cylinder Compressed air cylinders must be protected against impact and heat when transported or stored AI Cleaning Dirty components must be cleaned carefully and dried thoroughly after use Facepiece and demand valve must always be cleaned disinfected and dried after use Do not use any organic solvents such as Acetone Alcohol Benzene White Spirit Trichloroethylene or similar We recommend the following For cleaning Drager Wipex Cloths Water and Liquid Soap e g EW80 For bath disinfection Drager Safety Wash Incidur Tegodor F Refer to Order Lis
22. t for recommended suppliers of above Note When using any of the above cleaning and disinfecting agents it is important that precise attention be paid to concentration and reaction times Refer to manufacturers usage instructions All liquids and in particular disinfectant residues must be removed by rinsing in clean running water immediately after disinfection Excess water may be removed by using Wipex Cloths Do not immerse lung governed demand valve in water unless outlet port is sealed When drying a temperature of 60 degrees Celsius shall not be exceeded Demand Valves PA90A PAQOAE a n d PAQON Should it be necessary to clean and disinfect demand valve internally follow these instructions Remove rubber protective cover Rotate bayonet cap anti clockwise approx 90 degrees using tool Pt No 16 28089 and remove Carefully remove diaphragm by unhooking its centre location from balanced piston lever Fig 12 Note To prevent ingress of cleaning fluid into balancedpiston valve unit should be pressurised i e balanced piston closed Note Apply pressure LP viademand valve hose to close balanced piston PA90A and PAQOAE depress lever Fig 5 to switch OFF positive pressure Immersedemand regulator in cleaning fluid Refertocleaningfluid instructions After cleaning ensure demand valve is thoroughly dried Relocate diaphragm onto balanced piston lever Fig 12 and locate diaphragm be
23. ylinder valve port handtight only Where fitted hook anti vibration strap to handwheel Fig 2 Place complete unit back into horizontal position Adjust cylinder retaining strap by pulling it lightly to take up slack Fig 3 to activate camlock mechanism pull end of strap back over cylinder Fig 4 Firmly press loose end of strap onto velcro Connecting demand valve to apparatus PA90A AE and N t Note Connect demand valve to apparatus by inserting and pressing male coupling on demand valve hose into female coupling on supply hose until locked Locking mechanism is automatic but check that assembly is engaged and secure Operation Checks High Pressure Leak Test For positive pressure type demand valves ensure lever on demand valve is pressed towards front cover this switches OFF positive pressure mechanism Fig 5 Open cylinder valve slowly but fully to pressurise system Close cylinder valve Observe pressure gauge pressure shall not drop more than 5 bar in 1 minute Fig 1 Fig 3 Fig 4 Whistle Warning Unit Test PA90A and PA90AE Cover demand valve port with ball of hand and press centre of rubber cover Fig 6 to activate positive pressure Vent apparatus slowly by carefully lifting ball of hand and maintain a slow steady decrease in pressure PASON Vent apparatus slowly by gently pressing centre of protective cap i e su
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