Hitachi PC-ARFH1E-03 - 3 Electrical Wiring

3 ELECTRICAL WIRING
! DANGER
Always make sure to turn off the power of the indoor unit when performing electrical wiring work.
Performing electrical wiring work with the power turned on can damage the circuit boards of the
indoor unit and the remote control switch.
Wiring Example (Using a twist pair cable with shield tube: 1P-0.75 mm
2
or more)
REMOCON
A
REMOCON
B
REMOCON
A
REMOCON
B
3
4
Remote
control switch
Remote control
switch (Subsidiary)
Electrical box of unit
Terminal board 2
M3.5
screws
Twist pair cable with shield tube:
1P-0.75mm
2
or more
? NOTE
• Usea0.3to0.75mm
2
cableforconnection.Themaximumtotalcablelengthis:
- If3controllers(Unit+2zonethermostats)areinstalled:25meachone,foracombinedmaximum
of75m.
- If2controllers(Unit+1zonethermostats)areinstalled:50meachone,foracombinedmaximum
of100m.
- If1controller(Unit)isinstalled:upto100m.
• Iftotalcablelengthexceeds30m,useatwistpaircablewithshieldtube(1P-0.75mm
2
).Theuseof
cablesotherthanthosespeciedabovecancausemalfunctionduetotheeffectofnoise.
• Keepaclearanceofmorethan30cmbetweenthetransmissionline(remotecontrolswitchcableand
transmissionwires)andthepowersourceofindoorunits.Otherwise,theheatpumpmaynotoperate
properlyormalfunctionmayoccurduetotheeffectofpowersourcenoise.
• Refertothedocumentationprovidedwitheachunitforthepropersettingswhenperformingelectrical
wiringworkbetweentheremotecontrolswitchandtheindoorunits.
• Nogapshallexistbetweentheremotecontrolswitchcableandtheholeoftheremotecontrolswitch
case.Ifthereisagap,coverthegapwithvinyltape.Otherwise,malfunctionmayoccurduetothe
entranceofwaterdropletsorinsects.
• Incaseofsettinguptwoormoreremotecontrolswitches(MainandSubs),followthecontentsofthe
suppliedtechnicaldocumentationoftheindoorunitsinordertoselecttheappropriatefunctionsinthe
mainandsubremotecontrolswitches.Uponcompletionofsettings,turnoffthepowersupplyofallthe
indoorunitsconnectedtotheremotecontrolswitches.
Electrical Wiring
PMML0519 rev.0 - 03/2019
3
ENGLISH