Capacity
Max. Wire
Diameter
18
5-1. 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
circuit breaker for overcurrent protection should be
provided in the exclusive line.
(3)
To prevent possible hazard due to insulation failure,
the unit must be grounded.
(4)
Each wiring connection must be done in accordance
with the wiring system diagram. Wrong wiring may
cause the unit to misoperate or become 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.
5. ELECTRICAL WIRING
(7)
Regulations and wire diameters differ from locality to
locality. For field wiring rules, please refer to your
LOCAL ELECTRICAL CODES before beginning.
You must insure that installation complies with all
relevant rules and regulations.
(8)
To prevent malfunction of the air conditioner caused 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.
• Use shielded wires for inter-unit control wiring
between units and ground the shielded on both sides.
(9)
If the power supply cord of this appliance is damaged,
it must be replace by a repair shop appointed by the
manufacturer, because special purpose tools are
required.
5-2. Recommended Wire Lenght and Wire Diameter for Power Supply System
(1)
Single Type (One indoor unit / one outdoor unit)
Type
(A) Power Supply - 4 mm
2
(B) Inter-unit wiring - 2,5 mm
2
Power Supply Terminal Base
425 type (3 phase)
102 m
97 m
50 m
50 m
15 A
15 A
25 A
5.5 mm
2
436 type (3 phase)
96 m
60 m
50 m
50 m
15 A
20 A
25 A
5.5 mm
2
448 type (3 phase)
63 m
54 m
50 m
50 m
25 A
25 A
25 A
5.5 mm
2
425 type (1 phase)
17 m
17 m
50 m
50 m
40 A
40 A
50 A
14 mm
2
R 22
R 407 C
R 22
R 407 C
Time Delay
Fuse or
Circuit Capacity
CONTROL WIRING
(C) Inter-Unit Control Wiring
(D) Remote Control Wiring
0.75 mm
2
0.75 mm
2
Use Shielded Wiring
Max. 1000 m
Max. 500 m
NOTE
(1)
Refer to the Wiring System Diagrams (See next page)
for the meaning of “A”, “B”, “C”, and “D” in the above
tables.
(2)
Inter-Unit Control Wiring (C) has no polarity. But for
other wiring, respect polarity. Be sure to connect as
shown in the Wiring System Diagram.
(3)
The basic connection diagram of the indoor unit shows
the 8P terminal board, so the terminal boards in your
equipment may differ from the diagram.
(4)
For accordance with conformity of EC Directive No.
89/336/EEC, supply connection at the time of installtion
work it should be consider guidance showing below.
• Do not share a common installation group with other
equipment.
• Be sure that supply network impedance is sufficiently
low (
Z
SYS
R
Ω
).
It may be necessary to consult the power supply
authority before connection of the air conditioner to
a low-voltage public network.
≥
R
Ω
Models
R22
R407C
Remarks
425 type (3 phase)
–
–
Care is not needed
436 type (3 phase)
0.270 0.192
confortms to the local code
448 type (3 phase)
0.122 0.167
Ditto
425 type (1 phase)
0.126 0.126
Ditto
8P terminal board
U1U2
Inter-unit
control wiring
1 (L)2(N)
Power
supply
R1R2R3
Remote
controller
EG
R 22
R 407 C
