– I-77 –
Electrical Wiring
General Precautions on Wiring
(1)
Before wiring, confirm the rated voltage of the
unit as shown on its nameplate, then carry out
the wiring closely following the wiring diagram.
(2)
Provide a power outlet to be used exclusively for
each unit, and a power supply disconnect and cir-
cuit breaker for overcurrent protection should be
provided in the exclusive line.
(3)
To prevent possible hazards due to insulation fai-
lure, the unit must be grounded.
(4)
Each wiring connection must be done in accor-
dance with the wiring system diagram. Wrong
wiring may cause the unit to misoperate or beco-
me damaged.
(5)
Do not allow wiring to touch the refrigerant tubing,
compressor, or any moving parts of the fan.
(6)
Unauthorized changes in the internal wiring can
be very dangerous. The manufacturer will accept
no responsibility for any damage or misoperation
that occurs as a result of such unauthorized
changes.
(7)
If the respective phases of the 3-phase power
wiring are not connected correctly, a reverse
phase will occur and the compressor will not
start running. If this happens, swap over 2 of
the 3 phases (L1, L2, and L3).
Regulations on wire diameters differ from locality
to locality. For field wiring rules, please refer to
your LOCAL ELECTRICAL CODES before begin-
ning. You must insure that installation complies
with all relevant rules and regulations.
(8)
To prevent malfunction of the air conditioner cau-
sed by electrical noise, care must be taken when
wiring as follows:
•
•
The remote control wiring and the inter-unit control
wiring should be wired apart from the inter-unit
power wiring.
•
It is recommended that shielded wires or twisted
pair wires be used for the remote control and the
inter-unit control wiring if the air conditioner is
installed where it is exposed to the influence of
electrical and/or electro-magnetic noise.
Recommended Wire Length and Wire Diameter for Power Supply System
Models
(A)
*1
Power Supply
4 mm
2
(B)
*1
Inter-unit
Wiring
2.5 mm
2
Time Dealy
Fuse or
Circuit
Capacity
Three-
phase
model
Single-
phase
model
AER525 97 m 40 m 15 A
50 Hz AER536 60 m 50 m 15 A
AER548 54 m 50 m 25 A
50 Hz AER525 17 m 40 m 40 A
*1 Refer to the Wiring System Diagrams for the meaning of “A”, “B”.
AWG = American Wire Gauge
