Dometic SmartStart III - Relay Outputs; Comp - Compressor; Cwp - Chill Water Pump; Swp - Sea Water Pump

6
RELAYOUTPUTS 
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COMP – C OMPR E SSOR 
PLCCOMPoutputwillprovideswitchedpowertothecontactorcoiltoenablethecompressornormaloperation.
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CWP – CHILL WATER P UM P 
PLCCWPoutputwillprovideswitchedpowertothecontactorcoilsforthechilledwaterpump.
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SWP – SEA WATER P UM P 
PLCSWPoutputwillprovideswitchedpowertothecontactorcoilsfortheseawaterpump.
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RV– REVERSING VAL VE 
PLCRVoutputwillprovideswitchedpowertothecoilsforthereversingvalve.
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EH– ELECTRIC H EA T 
PLCEHoutputwillprovideswitchedpowertothecontactorcoilsfortheelectricheat.
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F AULT 
Provid esaNormallyOpen(NO)contactpoint.AnyfaultconditionwillclosetheNOcontact.Thisoutputcanbeusedtopoweralight,
relay,orinterfacetoaship’smonitoringsystem.Theoutputonthisterminalwillbe230VAC.
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SYSTEM OVERVIE W 
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SYSTEM P OWER ‐ UP 
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SOFTWARE REVI S I O N 
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Uponapplyingpowertothesystem,thedisplaywillindicatethesoftwarerevisionnumberordisplayitonthemainstatus
screen.
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PLCisenabledandwaitingforuserselection.
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MODBUS
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ThePLCcomeswitha3wireModbusconnectionaspartoftheelectricalbox.Thisconnectionisusedformultistageconfigurationand
networkingtoaboatmanagementsystem.
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S TA RT UP 
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ThePLCChillercontrollercanbeoperatedasasingleoramultistagechillerplant.Duringinitialsetup,thesystemwillbeconfiguredfor
thenumberofstagesandtheavailableoptions.SelectbetweenReturnwaterorSupplywatercontrol.Theuserhastheoptiontoselect
betweenmetricvalues
beingdisplayedorImperialvaluesbeingdisplayedduringoperationofthesystem.
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ChilledwatersetpointwillbeenteredforCoolandHeatmode.
Onceenabled,CWandSWpumpswillbeturnedonforoperation.
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OPERATIONAL CHECK S
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OncethePLCisenabledthesystemwillconductpre‐startupchecks.ThePLCprogramwillcheckallCWflowswitchesforfaults.ThePLC
willalsocheckHPandLPswitchesforfaults.
Individualstagefaultswillonlydisablethatstage.
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S ET POI N T S 
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C OO LI N G 
Coolingset‐pointisanadjustableparameterforReturncontrol(default)from48°F(8°C)to58°F(14°C)inonedegreeincrementsandfor
Supplycontrolfrom42°F(5°C)to58°F(14°C).Toadjustthecoolingsetpoint,simplytouchthe PLCscreenandchangetodesirednewset
point.Incooling
modeyouwillnotbeabletoenteranumberoutsideofthisrange.
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