Hitachi RPC-3.0FSR - Electrical Wiring; General Check

A10762300A-rev.1
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7. Electrical Wiring
● Wrap the accessory packing around the
wires, and plug the wiring connection hole
with the seal material to protect the product
from any condensate water or insects.
● Tightly secure the wires with the cord clamp
inside the indoor unit.
● Lead the wires through the knockout hole in
the side cover when using conduit.
● Secure the cable of the wired controller using
the cord clamp inside the electrical box.
7.1 GeneralCheck
(1) Makesurethattheeld-selectedelectrical
components(mainpowerswitches,circuit
breakers,wires,conduitconnectorsand
wireterminals)havebeenproperlyselected
accordingtotheelectricaldatagivenin
“TechnicalCatalog”.Makesurethatthe
componentscomplywithNationalElectrical
Code(NEC).
(2) Usetheshieldedtwistpaircableforthe
controlcablebetweentheoutdoorunitand
theindoorunit,thecontrolcablebetween
indoorunitsandthecontrollercableof
PC-ARF1.
(3) Checktoensurethatthepowersupply
voltageiswithin±10%oftheratedvoltage.
(4) Checkthecapacityoftheelectricalwires.
Ifthepowersourcecapacityistoolow,the
systemcannotbestartedduetothevoltage
drop.
(5) Checktoensurethattheearthwireis
connected.
Theprocedureofthewiringworkshallbe
performedaccordingtothismanualand“Installation
&MaintenanceManual”oftheoutdoorunit.
● The electrical wiring work must be performed
by authorized installers. If not, it may cause
an electric shock or a re.
● Perform the electrical work according to
each regulation of region and “Installation
& Maintenance Manual”, and the dedicated
electrical circuit must be used. If not
performing the electrical wiring work
completely or a capacity shortage of the
power circuit, it will cause an electric shock
or a re.
● Use the specied cables for wiring between
the outdoor unit and indoor units. Selecting
incorrect cables will cause an electric shock
or a re.
● Install an ELB (Earth Leakage Breaker) in the
power source. If not used, it will cause an
electric shock or a re.
● Turn OFF the main power switch of the
indoor unit and the outdoor unit before an
electrical wiring work or a periodical check
is performed. If not, it will cause an electric
shock or a re.
● Check to ensure that the indoor fan and the
outdoor fan have stopped before electrical
wiring work or a periodical check is
performed.
● Protect the wires, drain pipe, electrical parts,
etc. from rats or other small animals.
If not protected, rats may gnaw at unprotected
parts and at the worst, a re will occur.
● Tighten screws according to the following
torque.
M3.5: 1.2 N-m
M4: 1.0 to 1.3 N-m
● Connect earth wires for the outdoor / indoor
unit to prevent an electrical shock or an
unexpected accident. The earth resistance
must be less than 1 megohm. The earth work
must be performed by authorized installers.
● Turn completely OFF the power source to
prevent an electrical shock when opening the
service cover to perform the electrical work
or the maintenance.
● Pay attention not to bite electrical wirings
when attaching the service cover. It may
cause an electrical shock or re.