Table of Contents
Advertisement
7.
FIELD WIRING
To Electric Engineering Contractors
• Be sure to install an earth leakage breaker. The product incorpo-
rates inverter equipment. In order to prevent the malfunctioning of
the earth leakage breaker, make sure that the earth leakage
breaker withstands harmonic interference.
• Do not operate the air conditioner until refrigerant piping work is
completed, or otherwise the compressor will malfunction.
• Do not remove any electrical components such as thermistors or
sensors when connecting power supply wires or transmission
wires. The compressor may malfunction if the air conditioner is
operated with such electrical components removed.
CAUTION
• All field wiring and components must be installed by a licensed
electrician and must comply with relevant local and national reg-
ulations.
• Be sure to use a dedicated power circuit. Never use a power sup-
ply shared by another appliance.
• Never install a phase advancing capacitor. As this unit is equipped
with an inverter, installing a phase advancing capacitor will not
only deteriorate power factor improvement effect, but also may
cause capacitor abnormal heating accident due to high-frequency
waves.
• Only proceed with wiring work after blocking off all power.
• Always ground wires in accordance with relevant local and
national regulations.
• This machine includes an inverter device. Connect earth and
leave charge to eliminate the impact on other devices by reducing
noise generated from the inverter device and to prevent leaked
current from being charged in the outer hull of the product.
• Do not connect the ground wire to gas pipes, sewage pipes, light-
ning rods, or telephone ground wires.
Gas pipes: can explode or catch fire if there is a gas leak.
Sewage pipes: no grounding effect is possible if hard plastic pip-
ing is used.
Telephone ground wires and lightning rods: dangerous when
struck by lightning due to abnormal rise in electrical potential in
the grounding.
• Be sure to install an earth leakage circuit breaker.
This unit uses an inverter, so install the earth leakage circuit
breaker that be capable of handling high harmonics in order to
prevent malfunctioning of the earth leakage circuit breaker itself.
• Earth leakage circuit breaker which are especially for protecting
ground-faults should be used in conjunction with main switch or
fuse for use with wiring.
• Electrical wiring must be done in accordance with the wiring dia-
grams and the description herein.
• Do not operate until refrigerant piping work is completed.
(If operated before complete the piping work, the compressor may
be broken down.)
• Never remove thermistor, sensor or etc. when connecting power
wiring and transmission wiring.
(If operated with thermistor, sensor or etc. removed, the compres-
sor may be broken down.)
• This product have reversed phase protection detector that only
works when the power is turned on. If there exists black out or the
power goes on and off which the product is operating, attach a
reversed phase protection circuit. Running the product in
reversed phase may break the compressor and other parts.
• Attach the power wire securely. Introducing power with a missing
N-phase or with a mistaken N-phase will break the unit.
• Never connect the power supply in reversed phase.
The unit can not operate normally in reversed phase.
If you connect in reversed phase, replace two of the three phases.
• Make sure the electrical unbalance ratio is no greater than 2%. If
it is larger than this, the unit's lifespan will be reduced.
If the ratio exceeds 4%, the unit will shut down and an malfunction
code will be displayed on the indoor remote controller.
• Connect the wire securely using designated wire and fix it with
attached clamp without applying external pressure on the termi-
nal parts (terminal for power wiring, terminal for transmission wir-
ing and earth terminal).
8
7-1 Wiring Connection Example for Whole System
Power
Power
supply
Outdoor unit
supply
230V
400V
B
16V
B
Earth leakage circuit breaker
(Used for ground fault, overload, short-circuit protection.)
Note
• Use conduit for power supply wiring.
• Make sure the weak electric wiring (i.e. for the remote controller,
between units, etc.) and the power wiring do not pass near each
other, keeping them at least 50 mm apart.
Proximity may cause electrical interference, malfunctions, and
breakage.
• Be sure to connect the power wiring to the power wiring terminal
block and secure it as described in "7-3 Transmission Wiring
Connection Procedure".
• Transmission wiring should be secured as described in
"7-4 Power Wiring Connection Procedure".
• Secure wiring with clamp such as insulation lock ties to avoid con-
tact with piping.
• Shape the wires to prevent the structure such as the EL. COMPO.
BOX 1 lid deforming. And close the cover firmly.
• This equipment complies with EN61000-3-12 provided that short-
circuit power Ssc is greater than or equal to 1453 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 a short-cir-
cuit power Ssc greater than or equal to 1453.
7-2 Leading wire Procedure
• The power wiring and ground wiring are passed out from the
power wiring hole on the sides, the front (knock hole) or the bot-
tom frame (knock hole).
• The transmission wiring is passed out from the wiring hole (knock
hole) on the front of the unit or from a piping hole.
EL .COMPO. BOX 2
(Left-side)
Through cover
Cut off the shaded
zones before use.
For power wiring
and ground wiring
Conduit
Pipe opening
Note
• Open the knock holes with a hammer or the like.
• After knocking out the holes, we recommend you remove any
burrs and paint them using the repair paint to prevent rusting.
• When passing electrical wiring through the knock holes, protect
the wiring with a conduit or bushings, making sure not to damage
the wiring.
BEV unit
16V
B
Indoor
16V
unit
Remote
controller
COOL/HEAT
selector
EL .COMPO. BOX 1
(Right-side)
Electrical wiring diagram
(On the back of the
EL .COMPO. BOX 1
(Right-side) lid.)
Power wiring, ground
wiring (inside conduit)
(When the wiring is
routed out through the
right side.)
Wiring routed out
through (Front)
Transmission wiring
English
Advertisement
Table of Contents
