Installation Operation Maintenance

General Start-upOperating parameters statement• Switch on main power supplyswitch• Start the water pump(s) andcheck there is no cavitation• Start-up the unit followingprocedure described in manualref CG-SVU02A The unit and thechilled water pumps contactormust be connected together.After unit start up, leave inoperation for at least 15 minutes, toensure pressures are stabilized.Then check:• voltage• compressors currents• leaving and return chilled watertemperature• suction temperature andpressure• ambient air temperature• blowing air temperature• discharge pressure andtemperature• liquid refrigerant temperatureand pressureOperating parameters:• chilled water pressure dropthrough evaporator (if nohydraulic module is installed) orunit available pressure. It mustbe in accordance with Traneorder write-up.• superheat: difference betweensuction temperature and dewpoint temperature. Normalsuperheat should be within 4and 7 °C with R407C.• sub-cooling: difference betweenliquid temperature and bubblepoint temperature. Normalsubcooling should be within2 and 10°C with R407C.• Condenser approach: differencebetween dew point temperaturein high pressure and condenserair inlet temperature. Normalvalue on standard unit withR407C, should be 15 to 23°C atfull load.• Evaporator approach: differencebetween outlet watertemperature and dew pointtemperature in low pressure.Normal value on standard unit,without Ethylene glycol in chilledwater, should be about + 2-3°C.Final checkWhen the unit is operatingcorrectly:• Check that the unit is clean andclear of any debris, tools, etc.• Ensure all valves are in operatingposition.• Close control and starter paneldoors and check panels fixation.CG-SVX06A-E433