Technical Data Manual

Design of Mini VRF SYSTEM
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3. Electrical Wiring
Control wiring
AWG #18 (0.75 mm
2
)
Max. 3,280 ft.
AWG #18 (0.75 mm
2
)
Max. 1,640 ft.
AWG #18 (0.75 mm
2
)
Max. 650 ft. (Total)
(A) Inter-unit (between outdoor and
indoor units) control wiring*
(B) Remote control wiring
(C) Control wiring for group control
3-1. General Precautions on Wiring
(1)
as shown on its nameplate, then carry out the
wiring closely following the wiring diagram.
(2)
each unit, and a power supply disconnect, circuit
breaker and earth leakage breaker for overcurrent
protection should be provided in the exclusive line.
(3)
the unit must be grounded.
(4)
Before wiring, confirm the rated voltage of the unit
Provide a power outlet to be used exclusively for
To prevent possible hazards from insulation failure,
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)
compressor, or any moving parts of the fan.
(6)
Do not allow wiring to touch the refrigerant tubing,
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)
to locality. For field wiring rules, please refer
to your LOCAL ELECTRICAL CODES before
beginning.
You must ensure that installation complies with all
relevant rules and regulations.
(8)
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 shield on both sides.
(9)
Regulations on wire diameters differ from locality
To prevent malfunction of the air conditioner
If the power supply cord of this appliance is
damaged, it must be replaced by a repair shop
appointed by the manufacturer, because special
purpose tools are required.
3-2. Recommended Wire Length and Wire Diameter for Power Supply System
Outdoor unit
U-36LE1U6
U-36LE1U6E
30 A
U-52LE1U6
U-52LE1U6E
50 A
Time delay fuse or
circuit capacity
Time delay fuse or
circuit capacity
Indoor unit
K1
D1, U1, Y1, F1, M1, T1, P1, R1
Type
Type
15 A
15 A
15 A
E1
NOTE
* With ring-type wire terminal.
TD831156-00_MINI_VRF_SYS.indb 22TD831156-00_MINI_VRF_SYS.indb 22 2012/01/31 14:38:462012/01/31 14:38:46