Installation Operation Maintenance

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MaintenanceF) Compressor noisyCompressor knocks. Components broken in compressor. Change compressor.Suction duct abnormally cold.a) Uneven liquid flow.b) Expansion valve locked in open position.a) Check superheat setting and fixing of expansion valvebulb.b) Repair or replace.G) Insufficient cooling capacityThermostatic expansion valve "whistles". Not enough refrigerant. Check refrigerant circuit tightness and add refrigerant.Excess pressure drops through filter drier Drier filter clogged. Replace.Excessive superheat.Superheat not properly adjusted.Check adjustment of superheat and adjust thermostaticexpansion valve.Insufficient water flow. Chilled water pipes obstructed. Clean pipes and strainer.H) Discharge pressure too highCondenser abnormally hot.Chilled water leaving temperature too high.Condenser air output too hot.I) Suction pressure too highPresence of uncondensable liquids in system, or excessrefrigerant.Overload on cooling system.Reduced air flow. Air intake temperature higher thanspecified for unitPurge uncondensable fluids and drain off excess refrigerant.Reduce load on system.Reduce water flow if necessary.Clean or replace air filters. Clean coil. Check operation offan motors.Compressor operates continuously.Suction duct abnormally cold.Refrigerant flows back to compressor.J) Suction pressure too lowExcessive pressure drop through filter drier.Refrigerant does not flow through thermostatic expansionvalve.Excess cooling demand on evaporatora) Expansion valve too far open.b) Expansion valve locked in open position.Filter drier clogged.Expansion valve bulb has lost its refrigerant.Check system.a) Check for superheat and check that expansion valve bulbis secure.b) Replace.Replace the filter drier.Replace the bulb.Loss of power. Expansion valve obstructed. Replace.Superheat too low.K) Insufficient cooling capacityLow pressure drops through evaporatorExcessive pressure drops through evaporator.Low water flow rate.Check adjustment of superheat and adjust thermostaticexpansion valve.Check water flow rate. Check state of strainer, check forobstruction in chilled water pipes.Check pressure switch contact in water.50CG-SVX06A-E4
MaintenanceSafety recommendationsTo avoid accidents and damage, thefollowing recommendations shouldbe observed during maintenanceand service visits:1. The maximum allowablepressures for system leak testing onlow and high pressure side aregiven in the chapter "Installation".Always provide a pressureregulator.2. Disconnect the main supplybefore any servicing on the unit.3. Service work on the refrigerationsystem and the electrical systemshould be carried out only byqualified and experiencedpersonnel.Maintenance contractIt is strongly recommended that yousign a maintenance contract withyour local Service Agency. Thiscontract provides regularmaintenance of your installation bya specialist in our equipment.Regular maintenance ensures thatany malfunction is detected andcorrected in good time andminimizes the possibility thatserious damage will occur. Finally,regular maintenance ensures themaximum operating life of yourequipment. We would remind youthat failure to respect theseinstallation and maintenanceinstructions may result inimmediate cancellation of thewarranty.TrainingThe equipment described in thismanual is the result of many yearsof research and continuousdevelopment. To assist you inobtaining the best use of it andmaintaining it in perfect operatingcondition over a long period oftime, the manufacturer has at yourdisposal a refrigeration and airconditioning service school. Theprincipal aim of this is to giveoperators and technicians a betterknowledge of the equipment theyare using, or that is under theircharge. Emphasis is particularlygiven to the importance of periodicchecks on the unit operatingparameters as well as on preventivemaintenance, which reduces thecost of owning the unit by avoidingserious and costly breakdown.CG-SVX06A-E451
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 48 and 49: MaintenanceAnnual preventive visit
Page 52: Literature Order Number CG-SVX06A-E

Installation Operation Maintenance

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