Installation Operation Maintenance

OperationControl and unit operationThe control is through theTRACER CH530 control module.• Check the chilled water pump(s)operates• Start up the unit followingprocedure described in manualCG-SVU02A. The unit willoperate correctly when there issufficient water flow. Thecompressors will start up if theevaporator water leavingtemperature is above the controlmodule setpoint.Weekly start up• Check the chilled water pump(s)operates• Start up the unit followingprocedure described in manualCG-SVU02A.Weekend shutdown• If the unit needs to be shut downfor a short period of time, stopthe unit following proceduredescribed in manual CG-SVU02A(See "Clock" menu)• If the unit is shut down for alonger period, see under"Seasonal shutdown", below.• Ensure that all safeties are takento prevent frost damages duringnegative ambient temperature.• Do not put the generaldisconnect switches to off,except if the unit is drained.Trane does not recommenddraining the unit, due to the factthat it increases tube corrosion.Seasonal shutdown• Check water flows and interlocks.• Check glycol % in the chilledwater circuit if glycol presence isrequired• Carry out leak test.• Carry out oil analysis• Record operating pressures,temperatures, amperages andvoltage.• Check operation ofmachines/compare conditions ofoperation against originalcommissioning data.• Stop the unit followingprocedure described in manualCG-SVU02A.• Ensure that all safeties are takento prevent frost damages duringnegative ambient temperature.• Fill out the visit log sheet andreview with the operator• Do not put the generaldisconnect switch to off, except ifthe unit is drained.Trane does not recommenddraining the unit, due to the factthat it increases tube corrosion.Seasonal start-up• Check water flows and interlocks.• Check Ethylene glycol % in thechilled water circuit if glycolpresence is required• Check operational set points andperformance.• Calibrate controls.• 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.• Change the oil as required basedupon results of the oil analysismade during seasonal shutdown.Get the 8 condition measurementsat the same time, on each circuit.• HP• LP• Suction temperature• Discharge temperature• Liquid temperature• Water entering temperature• Water leaving temperature• Outdoor ambient temperatureThen calculate the sub-cooling andsuperheat. No diagnosis can beaccurate with one of these recordsmissing.• Check operation ofmachines/compare conditions ofoperation against originalcommissioning data.• Fill out the visit log sheet andreview with the operator46CG-SVX06A-E4