Hypertherm Koolant Koolers N-Series - 7.4 Service

 Operation‐InitialStartup 
26
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Table7:RecommendedCompressorWarm‐upTim e
DisconnectoffTime CompressorWarm‐upTime
<30min 0min
30minto2hrs 2hrs
2hrsto4hrs 4hrs
>4hrs 8hrs


CAUTION 
Startingthechillerpre‐maturelywithoutallowingadequatetimeforthecompressorstowarm‐
upcanallowtheliquidrefrigeranttobepumpedthroughthecompressorlubricationsystem
andcausepermanentdamagetothecompressorbearingsandvoidthechillerwarranty.
7.2 InitialStartup
7.2.1 LocalModeStart‐up
ThechillercanbeoperatedinaLocalModewhereitoperatesindependentoftheplasmacu ttingsystem,orina
RemoteModewhereitstartsandstopsautomaticallybasedonthestateoftheRemot eStart/Stopinterlock
fromtheplasmacuttingsystem.Uponinitialstartup thechillershouldbestartedinLocalModetoche
ckout
chilleroperationindependentoftheplasmacuttingsystem.
7.2.1.1 StartingtheChillerinLocalMode
TostartthechillerturntheLocal/Off/RemoteSwitchbelowthecontrollertotheposition.Thepumps
willturnonandstartcirculatingwater.
7.2.1.2 LeakCheck
 Thoroughlycheckallthep lumbinghosesandfittingsbetweenthechillerandpl
asmacuttingsystem
toensurenoleaksarepresent.
 Removethefilterpa nel fromthesideofthechillerandinspecttheinternal chillerplumbingto
ensuretherearenointernalplum bingleaks.
 Replacethefilterpanel.
 IfanyleaksarefoundturntheLocal/Off/Remote Switchtothe“O”positionandwaitforth
epumps
toautomaticallyshutoff(Theprocesspumpshutsdownin~3sandtherecirculationpumpin~10s).
 Onceanyleakshavebeenrepairedrestarttheprocedureat7.2.1LocalModeStart‐up.
7.2.1.3 ProcessPumpCheck
Fromthechillercontrollerhomescreenpressand/ortohighl
ighttheMONITORINGselection.Press
toaccesstheMONITORINGmenuandpressuntilthe“ProcessFluidCircuit”monitoringscreen
appears.Checktheprocesspump“Flow Rate”tomakesureitexceeds1.3gpm(4.92lpm)at50Hzor
2.2gpm(8.33lpm)at60Hz.Alsochecktheprocessfluidcircuitdischargepressure(“
DisPress”)toensureit
isatleast10psi(68.9kPa)belowtheshutdownpressureof240psi(1,655kPa).Theprocesspumpcircuitis 
equippedwithapressurereliefbypassvalvethatissettostartopeningat190psi(1,310kPa)andfully
bypasstheflowat230psi(1,586kPa).
Hypertherm, Inc. Part Number: 810540