Hitachi RPC-1.5FSN3 - 7 Electrical Wiring; General Check

P5416543
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7. Electrical Wiring
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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.
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Tightly secure the wires with the cord clamp
inside the indoor unit.
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Lead the wires through the knockout hole in
the side cover when using conduit.
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Secure the cable of the remote control switch
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 remote control switch
cable of PC-ARF.
(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.
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The electrical wiring work must be performed
by authorized installers. If not, it may cause
an electric shock or a re.
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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.
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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.
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Install an ELB (Earth Leakage Breaker) in the
power source. If not used, it will cause an
electric shock or a re.
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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.
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Check to ensure that the indoor fan and the
outdoor fan have stopped before electrical
wiring work or a periodical check is
performed.
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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.
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Tighten screws according to the following
torque.
M3.5: 1.2 N-m
M4: 1.0 to 1.3 N-m
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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.
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Turn completely OFF the power source to
prevent an electrical shock when opening the
service cover to perform the electrical work
or the maintenance.
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Pay attention not to bite electrical wirings
when attaching the service cover. It may
cause an electrical shock or re.