Electrical Wiring; General Check; Wiring - Hitachi RPIZ-0.8HNATNQ Operation Installation Maintenance Manual

7. Wiring

WARNING
●
Turn OFF the main power switches to the indoor
unit and outdoor unit before electrical wiring or
periodical check, and wait for at least three
minutes.
●
Check to ensure the indoor and outdoor fans
have stopped before electrical wiring or
periodical check.
●
Protect the wires, drain pipes, electrical parts,
etc. from rats or other small animals. If not
protected, rats may gnaw at unprotected parts,
which may lead to a fire.
●
Avoid the contact of wires with the refrigerant
piping, sheet metal edges and electrical
components in unit. Otherwise, the wires may get
damaged or even cause a fire.
● Use ELB with medium sensing rate (earth
leakage breaker with action time being equal to
0.1 seconds or less). The failure to do so may
result in electric shock or fire.
●
The wires must be firmly secured. External force
applied to terminals may cause a fire.
● Never connect the power terminal block for air
conditioner to power cord. At the indoor unit side
of air conditioner, power wiring can be extended
through a power distribution box. Be sure to
calculate the wiring capacity carefully, since
excessively low wiring capacity may frequently
cause fire.
● Do not start the system before all check points
are thoroughly checked.
●
Wrap the wires with adhesive tape or other materials
and plug the wiring connection hole with seal
material to protect the product from any
condensate water or insects.
●
The electrical box entrance hole shall be
designed with wire clamp that must be tightened
to address tension requirements when penetrated
by wires.
●
Secure the remote controller wire in electrical box
with wire tie.
●
Tighten screws to the following torques.
M4: 1.0~1.3 N·m
M5: 2.0~2.4 N·m
M6: 4.0~5.0 N·m
M8: 9.0~11.0 N·m
M10: 18.0~23.0 N·m

7.1 General Check

(1) Make sure that the field-selected electrical
components (main power switches, circuit
breakers, wires, conduit connectors and wire
terminals) comply with the National Electrical
Code.
(2) Check to ensure that the power supply voltage is
within ±10% of the rated voltage. The system
can't be started in the case of excessively low
supply voltage.
(3) Check the power capacity.
(4) Ensure the ground wire is connected.
(5) Install the main switch with a space of 3.5mm or
more between phases.
CAUTION
7.2 Electrica l Wiring Connection
The electrical wiring connection for indoor unit is
shown in Fig. 7.1.
(1) Connect the remote control wire to the PCB
in electrical box through the connection hole
on electrical box.
(2) Connect the power supply and earth wires to
the terminals in the electrical box.
(3) Connect the wires between the indoor unit
and the outdoor unit to the terminals in
electrical box.
(4) Tightly clamp the wires with wire tie in the
electrical box.
(5) Upon completion of wiring connection, seal
the wire interface with sealing material to
keep condensate water and insects off.
(6) The external static pressure of this indoor
unit is 10Pa at delivery, and the 10Pa plug
(white) of motor is connected to the PCN18
terminal of substrate. To set the external
static pressure to 30Pa, please connect the
30Pa plug (red) of motor to the PCN18
terminal of substrate as shown in the figure
below.
Air Outlet
Remove the fastening screw on electric box cover
Switching between external static pressures of 10Pa and 30Pa
7
Electric Box
Air Inlet
White
Indicating the text "10Pa"
Red
Indicating the text "30Pa"