3. Installation of indoor unit
3) Conduit connection
①
Remove the busing rubber product attached on the indoor unit.
②
Join the conduit and the conduit bracket together using nut.
③
Set the connecting cable into the terminal block of indoor
unit, and tighten set screw to lock the conduit bracket to the
indoor unit.
1. Use round crimp-style terminals for connecting wires
to the power supply terminal block. If unavailable,
observe the following points when wiring.
• Do not connect wires of different gauge to the same
power supply terminal. (Looseness connection may
cause overheating.)
• Use the specified electric wire. Connect the wire secure-
ly to the terminal. Lock the wire down without applying
excessive force to the terminal.
2. Tightening torque for the terminal screws.
• Use the correct screwdriver for tightening the terminal
screws. If the blade of screwdriver is too small, the head
of the screw might be damaged, and the screw will not
be properly tightened.
• If the terminal screws are tightened too hard, screws
might be damaged.
3. Do not connect wires of different gauge to the
same grounding terminal. Loose connection may
deteriorate protection.
4. At the unit, keep proper separation between trans-
missio and power supply wiring.
The equipment may malfunction if subjected to
electrical (external) noise.
5. Never connect power supply wiring to the terminal
block for remote controller wiring. A mistake of
the sort could damage the entire system.
6. Use only specified wire and tightly connect wires to ter-
minals. Be careful that wires should not place external
stress on terminals. Keep wiring in neat order and so as
not to obstruct other equipment such as popping open
the electric parts box cover. Make sure the cover closes
tight. Incomplete connections could result in overheat-
ing, and in worst case, electric shock or fire.
NOTE
• Make sure that the screws of the terminal are not loose.
Electricwire
Round crimp-style terminal
Attach insulation sleeve
Connect wires of the same gauge to both sides
After the confirmation of the above conditions, prepare the
wiring as follows:
1) Never fail to have an individual power circuit specifically for
the air conditioner. As for the method of wiring, be guided by
the circuit diagram posted on the inside of control cover.
2) The screw which fasten the wiring in the casing of electrical
fittings are liable to become loose from vibrations to which
the unit is subjected during the course of transportation.
Check them and make sure that they are all tightly fastened.
(If they are loose, it could cause burn-out of the wires.)
3) Confirm the specification of power source.
4) Confirm that electrical capacity is sufficient.
5) See to that the starting voltage is maintained at more than 90
percent of the rated voltage marked on the name plate.
6) Confirm that the cable thickness is as specified in the power
source specification. (Particularly note the relation between
cable length and thickness.)
7) Always install an earth leakage circuit breaker in a wet or
moist area.
8) The following would be caused by voltage drop.
• Vibration of a magnetic switch, which will damage the con-
tact point, fuse breaking, disturbance of the normal function
of the overload.
9) The means for disconnection from a power supply shall be
incorporated in the fixed wiring and have an air gap contact
separation of at least 3mm in each active(phase) conductors.
CAUTION
Heat pump 60Hz/R410A
_
45
Installation of
Outdoor Units
SINGLE ZONE
Lock nut
Conduit
mounting
plate
Conduit
WARNING
