Hitachi RCI-4.0FSR - Electrical Connection Of Kpi Units

3 Electrical and control settings
Unit electrical wiring and connection
SMGB0137 rev.0 - 05/2021
54
3.1.9 Electrical connection of KPI units
Work prior to the electrical connection
1 Turno󰀨thepowersupplyswitchesbeforestartingworkandttheappropriatelocksandsafetywarnings.
2 Wait5minutesafterturningo󰀨thepowersupplyswitches.
3 Checkthatthefansontheindoorandoutdoorunitsareatastandstillbeforestartingwork.
? NOTE
• Theelectricalpowerfortheunitmustinvolveaspecicpowerline,withanexclusivepowercontrolswitchandresidualcurrentbreaker,
installed in line with local or national safety regulations.
• Checkthattheelectricalpowerlinehasenoughcapacitytosupplytheunit.Itslength,thecablediameterandtheirprotection(sleeve
orjacket)mustbeappropriatefortheunit.
• Forfurtherinformation,alwaysconsiderthecurrentregulationsinthecountrywheretheunitistobeinstalled.
! CAUTION
• Riskofre:cablesmustnevertouchtherefrigerantpipes,printedcircuitboards(PCB),sharpedgesorelectricalcomponentsinside
the unit to avoid damaging them.
• Looseconnectionterminalsmayleadtocableandterminaloverheating.Theunitmayoperateincorrectly,leadingtoariskofre.
Checkthatthecablesarermlysecuredtotheconnectionterminals.
Electrical connection
Cutthecentreoftherubberbushinginthewiringconnectionknock-outhole.
Followthestepsbelowtoconnecttheremotecontrolcableortheoptionalextensionwire:
1 Passthecablethroughtheknock-outholeinthecabinet.
2 Connect the cable to the terminals on the printed circuit board
(PCB)locatedinsidetheelectricalbox.
3 TightenthescrewonterminalsAandBintheelectricalbox.
4 Checkthatthecablesarecorrectlysecured.
Cut inside
Rubber bushing
Nº Part
1 Remote Control
2 Transmission Wires
3 Power supply wires (Single phase)
4 Earth Screw
1
4
3
2
! CAUTION
Ifthepowercablesaretobeconnectedinseries,checkthatthecurrentisbelow50A.
Followthestepsbelowtoconnectthepowercablestothepowerterminalsintheelectricalbox:
1 Wherenecessary,loosenthescrewsonthepowerterminalsintheelectricalbox.
2 Connectthepowercablestothepowerterminalsintheelectricalbox.
3 Tightenthescrewsonthepowerterminalsintheelectricalbox.
4 Checkthatthepowercablesarecorrectlysecured.
Followthestepsbelowtoconnecttheearthwiretotheearthterminalintheelectricalbox:
1 Wherenecessary,loosenthescrewontheearthingterminalintheelectricalbox.
2 Connect the shielded part of the earth wire to the earth terminal.
3 Tightenthescrewontheearthterminalintheelectricalbox.
4 Checkthattheshieldedpartoftheearthingcablesarecorrectlysecured.
Firmlysecurethecablesusingatieinsidetheelectricalbox.
Cover the cables and the hole using a sealant to protect them from condensation and insects.