Electrical Wiring - Panasonic U-72MF1U9 Technical Data Manual

3. Electrical Wiring

3-1. General Precautions on Wiring
(1) Before wiring, confi rm 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, circuit breaker and
earth leakage breaker for overcurrent protection should
be provided in the exclusive line.
(3) To prevent possible hazards from 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, com-
pressor, or any moving parts of the fan.
(6) Unauthorized changes in the internal wiring can be very
dangerous. The manufacturer will accept no responsi-
3-2. Recommended Wire Length and Wire Diameter for Power Supply System
1
Outdoor unit
2
U-72MF1U9
U-72MF1U9E
U-96MF1U9
U-96MF1U9E
3
Indoor unit
Type
K1
D1, U1, Y1, F1, M1, T1, P1, R1
4
E1
Control wiring
(A) Inter-unit (between outdoor and
5
indoor units) control wiring*
AWG #18 (0.75 mm
Max. 3,280 ft.
6
NOTE
* With ring-type wire terminal.
7
8
Time delay fuse or
circuit capacity
40 A
45 A
Time delay fuse or
circuit capacity
10 – 16 A
10 – 16 A
10 – 16 A
(B) Remote control wiring
2
) AWG #18 (0.75 mm
Max. 1,640 ft.
bility for any damage or misoperation that occurs as a
result of such unauthorized changes.
(7) Regulations on wire diameters differ from locality to lo-
cality. For fi eld wiring rules, please refer to your LOCAL
ELECTRICAL CODES before beginning.
You must ensure that installation complies with all rel-
evant rules and regulations.
(8) To prevent malfunction of the air conditioner caused by
electrical noise, care must be taken when wiring as fol-
lows:
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) If the power supply cord of this appliance is damaged,
it must be replaced by a repair shop appointed by the
manufacture, because special purpose tools are re-
quired.
(C) Control wiring for group control
2
)
(D) Inter-outdoor unit control wiring
2 - 24
Design of 3WAY VRF SYSTEM
2
AWG #18 (0.75 mm )
Max. 650 ft. (Total)
2
AWG #18 (0.75 mm )
Max. 980 ft.