Hitachi PC-ARH1E - Electrical Wiring; Standard Wiring; Wiring for Multiple Units

3 ELECTRICAL WIRING
3.1 STANDARD WIRING
! CAUTION
• Attachtheringcore(black)(accessory)wheninstallingtheunit.
• Insertthecontrollercableintotheringcore,2turns,asshowninthe
leftgure, beforeconnecting tothe terminalboard. Ifwiring is0.75
mm
2
itisnecessarytopeeltheoutsidecover.
• Fixthecablebyusingtheband(accessory)
Band
Ring Core
Control
wiring
3.2 ELECTRICAL WIRING FOR MULTIPLE UNITS
This remote control switch can control sixteen units, as the maximum.
Maximum 16 indoor units
Twist Pair cable:
1 P - bigger than 0.75mm
2
Terminal Board
Terminal Board
M3.5
screws
M3.5
screw
! CAUTION
• Use0.3-0.75 mm
2
cable (maximumtotal cable length30m). Ifthetotal cablelength islongerthan 30m,use twist paircable (1P–0.75mm
2
)
(maximumtotalcablelength200m).Whenusewiththecontroltimer,(max.totalcablelength100m).Usingothercablesmaycausemalfunction
duetonoise.
• Keepadistanceofmorethan30cmbetweentheremotecontrol/indoorunittransmissioncablesandthepowerwiring.
• Ifinstalledwithin30cm,putthecablesinaconduittubeandearth(type-D;≤100Ω)oneendofthepipe.Withoutthisprocedure,malfunctionor
failureoftheairconditionerduetonoisemayoccur.
• Whenmultipleindoorunitsaresimultaneouslycontrolled,setaddressesforrefrigerantcycleandindoorunits.Especiallywhentheindoorunitsfrom
multiplerefrigerantcyclearesimultaneouslycontrolled,transmissionabnormalitymayoccurduetoaddressduplication.
• Formoreinformationaboutwiring remotecontrolswitch-indoor unitandsetting indoorunits addresses, seethe indoor units“INSTALLATION
MANUAL”.
• Donotleaveanyspaceatthecableopeningoftheremotecontrollercase.Ifthereisanyspace,coveritwith,e.g.,vinyltapetoavoidtroublecaused
bydeworinsectsenteringintothecontrollercase.
• Tousetworemotecontroller(main/subcontrollers),followtheprocedurein“7OPTIONALFUNCTION”toconguremain/subremotecontrollers.
Beforesetting,turnOFFthepowerofalltheindoorunitsconnectedtotheremotecontrolswitch.
ELECTRICAL WIRING
PMML0497 rev.1 - 12/2020
2