Installation manual
13
AZQS100~1Y1B
Split system air conditioners
4P332194-1B – 2015.01
14. Electrical wiring work
14.1. Precautions on electrical wiring work
Use only copper wires.
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 applicable legislation.
Do not turn on the main switch until all the wiring is completed.
For Y1
Make sure to connect power supply cables in normal phase. If
connected in reverse phase, the remote controller of the indoor
unit indicates "
U1
" and the equipment cannot operate. Change
any two of the three power supply cables (L1, L2, L3) to correct
phase.
If the contact in the magnetic switch should be forcibly turned on
while the equipment is inoperative, the compressor will burn out.
Never try to forcibly turn on the contact.
Never squeeze bundled cables into a unit.
Fix cables so that cables do not make contact with the pipes
(especially on high pressure side).
Secure the electrical wiring with cable ties as shown in the figure
in chapter
"14.2. Connecting power supply and inter-unit wiring"
on page 13
so that it does not come in contact with the piping,
particularly on the high-pressure side.
Make sure no external pressure is applied to the terminal
connectors.
When installing the earth leakage circuit breaker make sure that
it is compatible with the inverter (resistant to high frequency
electrical noise) to avoid unnecessary opening of the earth
leakage circuit breaker.
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 capacitor abnormal
heating accident due to high-frequency waves. Therefore, never
install a phase advancing capacitor.
14.2. Connecting power supply and inter-unit wiring
Secure the earth wire to the stop valve attachment plate so that
it does not slide.
Secure the earth wire to the stop valve attachment plate one
more time along with the electric wiring and the inter-unit wiring.
Lay the electrical wiring so that the front cover does not rise up
when doing wiring work and attach the front cover securely.
(See figure 6)
1
Switch box
2
Stop valve mounting plate
3
Ground
4
Tie-wrap
5
Wiring between units
6
Power supply and ground wiring
(See figure 5)
1
Power supply wiring and earth wire
2
Wiring between units
When cables are routed from the unit, a protection sleeve for the
conduits (PG-insertions) can be inserted at the knock-out hole.
(See figure 9)
1
Wire
2
Bush
3
Nut
4
Frame
5
Hose
A
Inside
B
Outside
When you do not use a wire conduit, be sure to protect the wires
with vinyl tubes to prevent the edge of the knock-out hole from
cutting the wires.
Follow the electric wiring diagram for electrical wiring works.
Form the wires and fix the cover firmly so that the cover may be
fit in properly.
14.3. Precautions on wiring of power supply and inter-
unit wiring
Use a round crimp-style terminal for connection to the power
supply terminal board. In case it cannot be used due to
unavoidable reasons, be sure to observe the following
instruction.
- Do not connect wires of different gauge to the same power
supply terminal. (Looseness in the connection may cause
overheating.)
- When connecting wires of the same gauge, connect them
according to the below figure.
Use the correct screwdriver to tighten the terminal screws.
Small screwdrivers can damage the screw head and prevent
appropriate tightening.
Over-tightening the terminal screws can damage the screws.
See the table below for tightening torques for the terminal
screws.
WARNING
All wiring must be performed by an authorized
electrician.
All components procured on the site and all electric
construction shall comply with the applicable
legislation.
DANGER: HIGH VOLTAGE
To avoid electrical shock, make sure to disconnect the
power supply 1 minute or more before servicing the
electrical parts. Even after 1 minute, always measure the
voltage at the terminals of main circuit capacitors or
electrical parts and, before touching, make sure that those
voltages are 50 V DC or less.
NOTICE
To persons in charge of electrical wiring work:
Do not operate the unit until the refrigerant piping is
complete. (Running it before the piping is ready will break
the compressor.)
DANGER
Before obtaining access to terminal devices, all supply
circuits must be interrupted.
Be sure to install an earth leakage circuit breaker in
accordance with applicable legislation. Failure to do
so may cause electrical shock.
CAUTION
Be sure to install the required fuses or circuit breakers.
Tightening torque (N•m)
M4 (X1M)
1.2~1.8
M4 (EARTH)
1.2~1.4
M5 (X1M)
2.0~3.0
M5 (EARTH)
2.4~2.9
1 2 3
1
Round pressure terminal
2
Cut out section
3
Cup washer
