Field Wiring: Overview; About The Electrical Wiring - Daikin RXYLQ12T7Y1B Series Installer And User Manual

WARNING
All field wiring and components MUST be installed by a
licensed electrician and MUST comply with the applicable
legislation.
WARNING
If NOT factory installed, a main switch or other means for
disconnection, having a contact separation in all poles
providing full disconnection under overvoltage category III
condition, MUST be installed in the fixed wiring.
WARNING
▪ ONLY use copper wires.
▪ Make sure the field wiring complies with the applicable
legislation.
▪ All field wiring MUST be performed in accordance with
the wiring diagram supplied with the product.
▪ NEVER squeeze bundled cables and make sure they
do NOT come in contact with the piping and sharp
edges. Make sure no external pressure is applied to the
terminal connections.
▪ Make sure to install earth wiring. Do NOT earth the unit
to a utility pipe, surge absorber, or telephone earth.
Incomplete earth may cause electrical shock.
▪ Make sure to use a dedicated power circuit. NEVER
use a power supply shared by another appliance.
▪ Make sure to install the required fuses or circuit
breakers.
▪ Make sure to install an earth leakage protector. Failure
to do so may cause electric shock or fire.
▪ When installing the earth leakage protector, make sure
it is compatible with the inverter (resistant to high
frequency electric noise) to avoid unnecessary opening
of the earth leakage protector.
Install power cables at least 1 metre away from televisions or radios
to prevent interference. Depending on the radio waves, a distance of
1 metre may not be sufficient.
WARNING
▪ After finishing the electrical work, confirm that each
electrical component and terminal inside the electrical
components box is connected securely.
▪ Make sure all covers are closed before starting up the
unit.
NOTICE
Do NOT operate the unit until the refrigerant piping is
complete. Running the unit before the piping is ready will
break the compressor.
NOTICE
If the power supply has a missing or wrong N-phase,
equipment will break down.
NOTICE
Do NOT install a phase advancing capacitor, because this
unit is equipped with an inverter. A phase advancing
capacitor will reduce performance and may cause
accidents.
NOTICE
NEVER remove a
connecting power wiring and transmission wiring. (If
operated without thermistor, sensor, etc., the compressor
may break down.)
RXMLQ8 + RXYLQ10~14T7Y1B*
VRV IV system air conditioner
4P543427-1 – 2018.07
thermistor, sensor, etc., when
NOTICE
▪ The reversed phase protection detector of this product
only functions when
Consequently reversed
performed during normal operation of the product.
▪ The reversed phase protection detector is designed to
stop the product in the event of an abnormality when
the product is started up.
▪ Replace 2 of the 3 phases (L1, L2, and L3) during
reverse-phase protection abnormality.
NOTICE
Only applicable if the power supply is three‑phase, and the
compressor has an ON/OFF starting method.
If there exists the possibility of reversed phase after a
momentary black out and the power goes on and off while
the product is operating, attach a reversed phase
protection circuit locally. Running the product in reversed
phase can break the compressor and other parts.
6.8.2

Field wiring: Overview

Field wiring consists of power supply (always including earth) and
indoor-outdoor communication (= transmission) wiring.
Example:
a
d d
i
c
b
h
a
b g
c
e e
h
h h
h f f
a Field power supply (with earth leakage protector)
b Main switch
c Earth connection
d Outdoor unit
e Indoor unit
f User interface
g Indoor power supply wiring (sheathed cable) (230 V)
h Transmission wiring (sheathed cable) (16 V)
i Outdoor power supply wiring (sheathed cable)
Power supply 3N~ 50 Hz
Power supply 1~ 50 Hz
Earth wiring
6.8.3

About the electrical wiring

It is important to keep the power supply and the transmission wiring
separated from each other. In order to avoid any electrical
interference the distance between both wiring should always be at
least 25 mm.
NOTICE
▪ Be sure to keep the power line and transmission line
apart from each other. Transmission wiring and power
supply wiring may cross, but may not run parallel.
▪ Transmission wiring and power supply wiring may not
touch internal piping (except the inverter PCB cooling
pipe) in order to avoid wire damage due to high
temperature piping.
▪ Firmly close the lid and arrange the electrical wires so
as to prevent the lid or other parts from coming loose.
The transmission wiring outside the unit should be wrapped and
routed together with the field piping.
6 Installation
the product starts
phase detection is
d
h
g
e
h
h
f
Installer and user reference guide
up.
not
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