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8.
E
LECTRICAL WIRING WORK
8.1. Precautions on electrical wiring work
WARNING: Electrical installation
All field wiring and components must be installed by an
installer and must comply with the applicable legislation
NOTICE
Electrical wiring work recommendations.
To persons in charge of electrical wiring work:
Do not operate the unit until the refrigerant piping is
complete. Running the unit before the piping is ready will
break the compressor.
DANGER: ELECTRICAL SHOCK
See
"2. General Safety precautions" on page
WARNING
■
A main switch or other means for disconnection,
having a contact separation in all poles, must be
incorporated in the fixed wiring in accordance with the
applicable legislation.
■
Use only copper wires.
■
All field wiring must be carried out in accordance with
the wiring diagram supplied with the unit and the
instructions given below.
■
Never squeeze bundled cables and be sure that it
does not come in contact with the non-insulated
piping and sharp edges. Be sure no external pressure
is applied to the terminal connections.
■
Power supply wires must be attached securely.
■
If the power supply has a missing or wrong N-phase,
equipment will break down.
■
Be sure to establish an earth. Do not earth the unit to
a utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.
■
Be sure to install an earth leakage protector in
accordance with the applicable legislation. Failure to
do so may cause electric shock or fire.
■
Be sure to use a dedicated power circuit, never use a
power supply shared by another appliance.
■
When installing the earth leakage protector be sure
that it is compatible with the inverter (resistant to high
frequency electric noise) to avoid unnecessary
opening of the earth leakage protector.
■
As this unit is equipped with an inverter, installing a
phase advancing capacitor not only will deteriorate
power factor improvement effect, but also may cause
a capacitor abnormal heating accident due to high-
frequency waves. Therefore, never install a phase
advancing capacitor.
■
Be sure to install the required fuses or circuit
breakers.
Installation manual
18
2.
Point of attention regarding quality of the public electric power
supply.
This equipment complies with respectively:
■
EN/IEC 61000-3-11
is less then or equal to Z
■
EN/IEC 61000-3-12
is greater than or equal to the minimum S
at the interface point between the user's supply and the public
system. It is the responsibility of the installer or user of the equipment
to ensure, by consultation with the distribution network operator if
necessary, that the equipment is connected only to a supply with
respectively:
■
Z
sys
■
S
sc
HXHD125
(1) European/International Technical Standard setting the limits for voltage
(2) European/International Technical Standard setting the limits for harmonic
NOTICE
The equipment described in this manual may cause
electronic noise generated from radio-frequency energy.
The equipment complies to specifications that are
designed to provide reasonable protection against such
interference. However, there is no guarantee that
interference will not occur in a particular installation.
It is therefore recommended to install the equipment and
electric wires keeping proper distances away from stereo
equipment, personal computers, etc....
In extreme circumstances you shall keep distances of 3m
or more and use conduit tubes for power and transmission
lines.
NOTICE
This is a class A product. In a domestic environment this
product may cause radio interference in which case the
user may be required to take adequate measures.
(1)
provided that the system impedance Z
.
max
(2)
provided that the short-circuit power S
less than or equal to Z
max
greater than or equal to the minimum S
Ω
Z
(
)
max
0.46
changes, voltage fluctuations and flicker in public low-voltage supply
systems for equipment with rated current ≤75 A.
currents produced by equipment connected to public low-voltage systems
with input current >16 A and ≤75 A per phase.
sys
sc
value
sc
value.
sc
Minimum S
value
sc
1459 kVA
HXHD125A7V1B
VRVIII system indoor unit
4PW62584-1A – 11.2010
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