OPERATION AND MAINTENANCE MANUAL
Contents
1. Pressure Switch Operation 1 The pressure switch serves as the primary power switch for the AA 75CF compressor The switch is preset for cut off 105 psi and cut in 75 psi air storage tank pressures and is equipped with an unloader valve which relieves the compressor cylinder pressure when the maximum tank pressure is reached If for any reason the compressor stops before the maximum tank pressure is achieved the cylinder pressure can be relieved manually by toggling the pressure switch to the OFF position This process will prevent a high current compressor start 2 The system is protected from high current damage by a 15 Amp system circuit breaker located behind the power inlet receptacle Page 6 Should this breaker be tripped turn pressure switch to the OFF position Reset system circuit breaker Restart compressor according to the Operating Instructions 3 Attached to the pressure switch are a female quick connect fitting a pressure relief valve and a 0 160 psi pressure gauge 4 The female quick connect fitting is the attachment point for an air line to the ADU 10CF Field Unit 5 The pressure relief valve prevents over pressurizing the tank in the unlikely event of a pressure switch failure 6 The pressure gauge offers a visual indication that the air storage tank is maintaining pressure properly Air Storage Tank Operation Located between the aftercooler assembly and the exhaust baffle chassis is a valve2. Extended compressor cycle time Air demand has been altered Clogged intake filters Air line leaks Water collected in air storage tank Page 10 Readjust instruments Clean or replace Tighten couplings retape Blow off tank Motor won t start with gauge pressure at 0 psi The thermal protection of the compressor may have been activated If system fans are still functioning allow the unit to cool briefly and restart If system fans are not running a high amperage condition existed resulting in the system circuit breaker being tripped This condition will result from a leaking check valve or malfunctioning unloader valve Motor experiences labored start with gauge pressure below 70 psi This condition results from the motor attempting to restart with pressure in the cylinder This is an indication of a leaking check valve or malfunctioning unloader valve Inspect the check valve and the unloader switch Service components as required Motor starts at an intermediate pressure or Pressure relief valve is activated Disconnect the unit from the power source Inspect the pressure switch for excessive wear and damaged or dirty components Replace parts as required Compressor cycles more frequently than is common Shut off compressor Watch the tank pressure gauge If the tank pressure drops rapidly check tubing and fittings for leaks If tubing and fittings are satisfactorily connected the check valve should be inspected for dir
3. used for draining the air storage tank During normal use moisture from system air will condense in the tank To prevent excessive moisture accumulation the air storage tank should be drained daily 1 Check that some air pressure is present in the tank 2 Point the case side tank drain tube away from compressor and open the drain valve fitting 3 Vent the air storage tank until most of the water is drained then close the drain valve fitting This procedure will both blow off water and bleed the tank of pressure for storage or transportation When operating in wet or humid environments water build up may increase Shortened cycle time may indicate reduced air storage tank capacity Drain air storage tank as necessary Case Drain Operation When operating in wet weather conditions water may collect in the case bottom from rain contact and moisture in the intake air This water can be removed by attaching the saliva ejector body from the ADU 10CF to the case drain fitting and applying vacuum Page 7 Duplex Outlet Operation To accommodate supplemental equipment the AA 75CF has a duplex outlet located on the top cover The outlet will supply 120V power regardless of the supplied system power and is protected by a 2 amp circuit breaker located next to the outlet cover Duplex outlet power is available when the pressure switch is in the AUTO position Grounding Lug Mounting point supplied for attaching an earth ground Air Flow
4. OPERATION AND MAINTENANCE MANUAL AA 75CF NSN 6520 01 456 7170 Part 1 of 2 Aseptico P O Box 1548 Woodinville WA 98072 1548 1 800 426 5913 425 487 3157 Fax 425 487 2608 email info aseptico com Internet www aseptico com Table Of Contents Illustrations Introduction 2 Component Identification 3 Safety Precautions 4o Case TOP ace oe ley tees ag 5 Operation Instructions Pressure Switch 5 Set Up sene ria pasa cana pele ees 4 Air Line Connection 5 Compressor 05 6 Daily Functional Check List 6 Pressure Switch jie tarveta tee l ss 6 Air Storage Tank 7 Case Drain 14 este gee adccdeuns T7 Duplex Outlet i0 654000e0a s0 8 Air Flow System 8 Extreme Temperature Operation 9 Long Term Storage Prep 10 Troubleshooting 10 Specifications 11 INTRODUCTION Performance in tandem with portability makes the Aseptico AA 75CF Command Air Portable Air Compressor perfect for the demanding professional When used with the ADU 10CF Portable Dental Field unit the AA 75CF provides excellent performance for the needs of today s field dentistry At 3 6 cu ft 19 x19 x17 3 and 102 lbs the AA 75CF can be easily transported and stored Integrated case construction minimizes set up and tear down times as well as reduces compressor running noise below 75 dBA A 3 4 horse po
5. System Operation In order to move fresh air through the AA 75CF two cooling fans reside on top cover of the compressor top These fans activate when the pressure switch is toggled to the AUTO position They run while the compressor is operating and two minutes after the compressor stops Incoming air for both fans is filtered by foam media After each day of use this media should be cleaned To clean media 1 Remove snap on media guard from fan guard assembly 2 Extract filter media 3 Rinse with soapy water 4 Squeeze dry and replace Intake air for the compressor is filtered through two compressor intake filters One is located on each compressor head The felt media of these filters requires periodic inspection and replacement Excessive contamination can reduce compressor output and may affect service life If a clean dry operating environment is maintained initial inspection is recommended after 500 hours Humid or wet conditions require more frequent inspection To replace filters 1 Remove lower module from case bottom as per instructions in Extreme Temperature Operation 2 Locate air intake filters located on the top of the compressor heads 3 Grasp filter cap and twist counterclockwise to expose felt media 4 Remove felt media and replace with part 730382 Page 8 Extreme Temperature Operation When the AA 75CF is to be used in an extremely hot environment for extended periods of time the compressor may overhe
6. at Thermal protection in the compressor will shut off the motor when this condition arises If this shut off occurs additional cooling is necessary The compressor cooling can be improved at the expense of noise reduction by removing the compressor from the hard shell case Operating the AA 75CF s compressor s compo nent module outside the case provides superior air flow and heat dissipation To extract the compressor from hard shell case 1 Remove case top 2 Carefully place unit top cover down 3 Remove the case bumper screws sealing washers and case bumpers Refer to Service Manual Reference figure B Note this will require a 7 16 in socket wrench 4 Lift off case bottom 5 Turn the compressor back to upright position 6 Replace by reversing steps Secure case bumpers using a thread locking compound Shut Down 1 If necessary drain the case using the saliva ejector body 2 Perform the end of the day fan filter cleaning and air storage tank draining procedures see Air Storage Tank Operations Procedures page 7 3 Turn the pressure switch to the OFF position Allow air storage tank to drain completely then close tank drain valve 4 Fold the case legs into the case top 5 Disconnect the power cord and the air hose and return the power cord to the cord pouch 6 Replace the case lid and secure all perimeter latches Page 9 Preparation for Long Term Storage and Shipment Preparation for long ter
7. l packaging With the large side of the case down unlock all perimeter latches and remove the case top Select the power cord appropriate for the power source from the cord pouch Reference figure 2 Swing down the case legs contained in the case top and fit them into the leg sockets on the compressor top cover The case top will serve as protection from the elements and offer minor noise reduction Reference figure 2 Page 4 Figure 2 Case Leg Figure 3 Case Top a Pressure Switch OFF AUTO Switch Female Quick Connect Power Cords Fe C et IE op Coa mee Ceo TO AA 75CF COMPRESSOR 10M 10 ft ADU 10CF UNIT INPUT TAEAE A EERE Seton eee ee ee ee ee ee ne be ote se ee esc ete ey Figure 4 Air Supply Line Connection 4 With the OFF AUTO switch of the pressure switch in the OFF position plug the female end of the selected power cord into the power inlet receptacle on the compressor and the other end into an appropriate power source At this time the compressor circuitry will detect the line voltage and select appropriate operating condi tions If 230 Volt power is detected a click will be audible as voltage selector relays switch Voltage should not hereafter be changed during operation Reference figure 3 5 From the ADU 10CF air hose package locate the 3 8 male male air hose Connect 3 8 male male quick connect air hose to the female air output connector on c
8. m storage or shipment should be performed by completing the steps of the Shut Down section of Operation Instructions With the pressure switch in the OFF position wipe down exposed components with a commercial dental disinfectant drain the air storage tank and evacuate any standing water in the case bottom Thoroughly drying the unit will prevent a high humidity environment from developing in the sealed case Collect the power cords in cord pouch and store the pouch in the space above the duplex outlet Place the pouch s Velcro edge down to prevent compression of the intake hose Fold case legs into the top replace the lid and secure all perimeter latches When unpacking after extended storage complete the daily functional check list Troubleshooting Symptom Problem System non operational Main breaker tripped Pressure switch contacts corroded Action Reset main breaker Replace switch Compressor motor not running Main breaker tripped Thermal overload tripped Reset main breaker Allow several minutes to cool and restart No duplex outlet power Circuit breaker tripped Reset duplex breaker Tank pressure exceeds 110 psi Pressure switch settings altered Readjust according to Pressure Switch Replacement section note Compressor attempts to Leaking or obstructed check valve restart under load Misaligned unloader valve Disassembly and clean or replace Tighten unloader valve screw and realign
9. ompressor Connect the female male extension air hose if desired Connect to the ADU 10CF dental unit See figures 3 amp 4 WARNING Do not start the compressor with the male male hose installed only to the compressor module Connection in this manner may result in injury to user The other end of the air hose must be connected to the delivery unit Page 5 Compressor Operation 1 With the steps of the Set Up section complete toggle the pressure switch to the AUTO position The compressor will then fill the air storage tank and cutoff indicating full pressure As air is consumed in normal operation the compressor will cycle when the air storage tank pressure falls below 70 psi until it reaches 105 psi If the compressor is to remain idle for an extended period of time toggle the pressure switch to the OFF position Daily Functional Checklist With the AA 75CF compressor connected to a power supply opera tion of the following components ensures full function performance Compressor motor functions _ Air storage tank maintains pressure Pressure switch dictates a cut off pressure of 105psi 5psi and a restart pressure of 70 psi 10psi Pressure switch unloader valve actuates relieving intake line pressure Aftercooler and intake fans operate while the compressor runs and two minutes after compressor cut off Duplex outlet provides auxiliary equipment power 120V
10. pment Air Storage Tank Case Drain Fitting Drain Valve Aftercooler Assembly Exhaust Baffle Leg Socket AUTO OFF Switch Pressure Switch Intake Fan Filter Female Quick Connect Duplex Outlet Safety Relief Duplex Outlet Valve Circuit Breaker Pressure Gauge 2 amp System Circuit Breaker Power Inlet 15 amp Receptacle Air Storage Tank Figure 1 AA 75CF Component Identification Page 3 SAFETY PRECAUTIONS 1 This compressor needs no lubrication and should never be oiled Applying oil to any part could result in polluted air delivery to the air handling equipment 2 Always run the compressor with the case lid open to ensure proper cooling of the compressor head and motor 3 All compressors generate heat even under normal operating condi fe 8 9 tions To avoid serious burns never touch the compressor or internal parts during or immediately after operation When unit is not in use wrap power cords and store inside compressor Do not abuse cord ALWAYS use a grounded 3 prong power cord and grounded power source To prevent explosive hazard DO NOT operate compressor near combustible liquids or vapors Personal injury and or property damage may result Do not submerge unit in water Ambient temperature should not exceed 49 C 120 F Always disconnect the power before servicing OPERATION INSTRUCTIONS Set Up 1 Unpack the AA 75CF unit from all externa
11. t and damage If after shut off tank pressure is maintained the tank should be blown off Water vapor can condense in the tank and reduce its capacity Compressor takes longer to build tank pressure than is common Check system tubing and fittings for leaks Inspect compressor air intake filters Replace filter cartridge if required No power to duplex outlet Verify system is powered Reset duplex outlet circuit breaker Page 11 Specifications Standard Features 120 230V 50 60Hz 3 4hp compressor Aluminum Air Storage Tank Dual Pass Aftercooler Auxiliary Equipment Power Supply Dimensions 19 x 19 x 17 3 in Volume 3 6 cu ft Weight 102 Ibs Noise Level lt 75dBA Electrical Requirement 120 230 Volt 50 60Hertz Compressor Motor Performance 2 9 SCFM 100 psi 60 Hz 2 4 SCFM 100 psi 50 Hz Air Storage Capacity 1 US Gallon 3 785 liter Auxiliary Equipment Power Outlet 120 Volt duplex outlet Operating Temperature 2 C to 49 C 35 F to 120 F For Further Service And Or Technical Assistance Contact Aseptico P O Box 1548 Woodinville WA 98083 1 800 426 5913 425 487 3157 Fax 425 487 2608 email info aseptico com Internet www aseptico com Printed In The USA PIN 420218
12. wer twin cylinder oilless compressor with claimed operating pressures above 105 psi and flow rates on the order of 2 5 SCFM at 100 psi is the heart of this unit while an internal frame provides protection for the compressor motor and supports the unit s subsys tems A customized air conditioning system composed of a one gallon air storage tank an aftercooler a pair of fans and a pressure switch minimizes the workload on the compressor and facilitates the delivery of cool dry air Page 2 The AA 75CF operates off either a 120 or 230 Volt external power source and has voltage detection circuitry which makes powering the unit as simple as selecting the proper cord for the electrical source receptacle A power source capable of supplying 2000 Watts at 120 or 230 Volts and a 3 8 male quick connect coupling to mate with the compressor s air output fitting is all that is required to begin using the AA 75CF A duplex outlet provides 120 Volt power to supplemental equipment Power outlet and system circuit breakers a safety relief valve and a pressure switch with an unloader valve are included to ensure the safety of the system and the user The AA 75CF will provide reliable service in all conditions with a minimum amount of routine mainte nance Simply keep the air intake filters clean the tank emptied surfaces disinfected and follow the instructions provided in this manual to receive the best and longest service from your Aseptico equi
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