Installation Operation Maintenance

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<strong>Maintenance</strong>Annual preventive visit• Check water flows and interlocks• Check expansion tank pressure• Check glycol % in the chilledwater circuit if glycol presence isrequired• Check operational set points andperformance• Calibrate controls and pressuretransducer• Check operation of all safetydevices• Inspect contacts and tightenterminals• Megger the motor compressorwindings• Record operating pressures,temperatures, amperages andvoltage• Carry out leak test• Check configuration of unitcontrol module• Carry out oil analysis• Change the oil as required basedupon results of the oil analysis• Check operation ofmachines/compare conditions ofoperation against originalcommissioning data• Fill out the annual start up visitlog sheet and review with theoperator• Check and clean the strainerCAUTION:• Please refer to specific Tranedocumentation on oil, availablefrom your nearest Trane office.Oils recommended by Trane havebeen exhaustively tested in Tranelaboratories to the specificrequirement of Trane chiller andhence the user's requirements.Any use of oils not meetingspecifications recommended byTrane is the responsibility of theuser only, who thereby is liable towarranty loss.• Oil analysis and oil test aciditymust be carried out by aqualified technician. Poorinterpretation of results maycause unit operating problems.Also, oil analysis must follow thecorrect procedures, to avoidaccidental injury to maintenancepersonnel.• If the condensers are dirty,(Remote condensers) clean themwith a soft brush and water. Ifthe coils are too dirty, consult acleaning professional. Never usehigh pressure water to cleancondenser coils.• Contact Trane Service forinformation on maintenancecontracts.Warning:Switch off unit main power supplybefore to any intervention. Failureto follow this safety instruction canlead to injury or death of themaintenance personnel and mayalso damage equipment.CAUTION: Never use steam or hotwater above 60°C to cleancondenser coils (Remotecondensers). The resultingincreasing pressure could causerefrigerant lost through the safetyvalve.48CG-SVX06A-E4
<strong>Maintenance</strong>Troubleshooting guideThese are simple diagnostic hints,not a comprehensive analysis of theScroll compressor refrigerationsystem.The aim is to give operators simpleinstructions on basic unit processesso that they have the technicalknowledge to identify and bringdefective operations to the notice ofqualified technician. If there is abreakdown, the Trane Service officeshould be contacted forconfirmation and assistance.Problems symptoms Problem causes Action recommendedA) The compressor does not start upCompressor terminals are live but motor does not start. Motor burned out. Replace compressorContactor motor not operational. Coil burned out or broken contacts. Repair or replace.No current ahead of motor contactor.a) Power cut.b) Main power supply switched off.Check fuses and connection.See why system tripped.If system is operational, switch on main power supply.Current ahead of fuse, but not on contactor side. Fuse blown. Check motor insulation. Replace fuse.Low voltage reading on voltameter. Voltage too low. Contact power Supply Utility.Starter coil not excited. Regulation circuit open. Locate regulation device which has tripped out and seewhy. See instructions concerning this device.Compressor does not run.Compressor motor "groans".High pressure switch tripped to contacts open on highpressure.Discharge pressure too high.Compressor sticking (damaged or sticking components).Discharge pressure too highShut down by thermal overload due to dischargetemperature or motor thermal overloadSee "Discharge pressure too high".Wait 30 minutes until auto reset of compressor mountedprotection. Check superheat versus suction pressure orwater temperatures of operation.B) Compressor stopsHigh pressure switch tripped.Over current thermal relay tripped.Motor temperature thermostat tripped.Anti-freeze security tripped.Discharge pressure too high.a) Voltage too low.b) Cooling demand too high, or condensing temperature toohigh.Not enough cooling fluid.Water flow to evaporator too low.See instructions for "discharge pressure high".a) Contact Power Supply Utility.b) See instruction "discharge pressure too high".Repair leak. Add refrigerant.Check water flow rate, and flow switch contact in waterC) Compressor stops just after its startSuction pressure too low.Filter drier iced up.Filter drier clogged.Replace filter drier.D) The compressor keeps running without stoppingTemperature too high in areas requiring air-conditioning. Excess load on cooling system. Check thermal insulation and air-tightness of areas requiringair-conditioning.Chilled water temperature output too high. Excess cooling demand on system. Check thermal insulation and air-tightness of areas requiringair-conditioning.E) Loss of oil in compressorOil level too low in indicator. Not enough oil. Contact Trane office before to order oilGradual fall in oil level. Filter drier clogged. Replace filter drier.Suction line too cold.Compressor noisyLiquid flows back to compressor.Adjust superheat and check bulb fixing of the expansionvalve.CG-SVX06A-E449
Page 1 and 2: InstallationOperationMaintenanceInd
Page 3: ContentsGeneral informationForeword
Page 6 and 7: General DataTable 3 - Water cooled
Page 8 and 9: General DataTable 5 - Evaporator hy
Page 10 and 11: InstallationUnit nameplateThe unit
Page 12 and 13: InstallationFigure 2 - Rigging the
Page 14 and 15: InstallationMinimal installation wa
Page 16 and 17: InstallationFigure 4 - CCUN hydraul
Page 18 and 19: InstallationFigure 6 - CCUN hydraul
Page 20 and 21: Installation1. Pressure gauges: sho
Page 22 and 23: InstallationThe minimum required su
Page 24 and 25: InstallationPressure relief valve -
Page 27 and 28: InstallationWhen ordered, the outdo
Page 29: InstallationOperating rangeCAUTION:
Page 32 and 33: General Start-upStart-upFollow the
Page 34 and 35: General Start-upCAUTION:For the war
Page 36 and 37: General Start-upFigure 23 - High ef
Page 38 and 39: General Start-upFigure 27 - Evapora
Page 40 and 41: General Start-upFigure 31 - Evapora
Page 42 and 43: General Start-upFigure 35 - Condens
Page 44 and 45: General Start-upThe correction fact
Page 46 and 47: OperationControl and unit operation
Page 50 and 51: MaintenanceF) Compressor noisyCompr
Page 52: Literature Order Number CG-SVX06A-E

Installation Operation Maintenance

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