Electrical Wiring - Panasonic U-72MF2U9 Installation Instructions Manual

4. ELECTRICAL WIRING

4-1. 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.
WARNING
(2) This equipment is strongly recommended to be
installed with Earth Leakage Circuit Breaker (ELCB)
or Residual Current Device (RCD). Otherwise,
it may cause electrical shock and fire in case of
equipment breakdown or insulation breakdown.
Provide a power outlet to be used exclusively for
each unit, and Earth Leakage Circuit Breaker
(ELCB) 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,
compressor, or any moving parts of the fan.
4-2. Recommended Wire Length and Wire Diameter for Power Supply System
Outdoor unit
Time delay fuse or
Type
U-72MF2U9
U-96MF2U9
U-120MF2U9
U-144MF2U9
Control wiring
(A) Inter-unit (between outdoor and
indoor units) control wiring*
AWG #18 (0.75 mm
Max. 3,280 ft. (1,000 m)
NOTE
* With ring-type wire terminal.
circuit capacity
45 A
60 A
60 A
70 A
(B) Remote control wiring
2 ) AWG #18 (0.75 mm
Max. 1,640 ft. (500 m)
(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) Regulations on wire diameters differ from locality 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) To prevent malfunction of the air conditioner caused by
electrical noise, care must be taken when wiring as follows:
● T he remote control wiring and the inter-unit control
wiring should be wired apart from the inter-unit power
wiring.
(9) 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.
Indoor unit
Time delay fuse or
Type
K2
D1, U2, Y2, F2, M2, T2, P1, R1
E1
(C) Control wiring for group control
2 )
(D) Inter-outdoor unit control wiring
29
circuit capacity
15 A
15 A
15 A
AWG #18 (0.75 mm 2 )
Max. 650 ft. (200 m) Total
AWG #18 (0.75 mm 2 )
Max. 980 ft. (300 m)