AAON LF Series Installation Operation & Maintenance
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27ServiceIf the unit will not operate correctly and aservice company is required, only a FactoryTrained Service Technician qualified andexperienced in both refrigerant chillers andair conditioning is permitted to service thesystem to keep warranties in effect. Ifassistance is required, the service technicianmust contact AAON.Note: Service technician must provide themodel and serial number of the unit in allcorrespondence with AAON.WarrantiesPlease refer to the limitation of warranties ineffect at the time of purchase.Condenser Tube InspectionIt is the responsibility of the installer to verifythat the system is sealed before charging withrefrigerant.Pump OperationBefore initial start of the pump, check asfollows:1. Be sure that pump operates in the directionindicated by the arrow on the pump casing.Check rotation each time motor leads havebeen disconnected.2. Check all connections of motor andstarting device with wiring diagram. Checkvoltage, phase and frequency of line circuitwith motor name plate.3. Check suction and discharge piping andpressure gauges for proper operation.4. Turn rotating element by hand to assurethat it rotates freely.Running:Periodically inspect pump while running, butespecially after initial start-up and afterrepairs.1. Check pump and piping for leaks. Repairimmediately.2. Record pressure gauge readings for futurereference.3. Record voltage, amperage per phase, andkW.Pump/Fan Motor MaintenanceCleaning - Remove oil, dust, water, andchemicals from exterior of motor and pump.Keep motor air inlet and outlet open. Blowout interior of open motors with cleancompressed air at low pressure.Labeled Motors - It is imperative for repair ofa motor with Underwriters’ Laboratorieslabel that original clearances be held; that allplugs, screws, other hardware be fastenedsecurely, and that parts replacements be exactduplicates or approved equals. Violation ofany of the above invalidates Underwriters’Label.Access DoorsIf scale deposits or water is found around theaccess doors, adjust door for tightness.Adjust as necessary until leaking stops whendoor is closed.Pump Bearings - LubricationEvery 6 months or after a prolonged shutdown, use waterproof, lithium based grease.Below 32°F, use Esso Exxon or Beacon 325.Above 32°F, use Mobil Mobilox EP2, ShellAlvania EP2 or Texaco RB2.Air InletInspect the air inlet louvers into thecondenser section on a monthly basis toremove any paper, leaves or other debris thatmay block the airflow. |
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