Electrical Wiring; 4-1. General Precautions On Wiring; 4-2. Recommended Wire Length And Wire; Diameter For Power Supply System - Panasonic U-72MF1U9 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.
(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,
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.
4-2. Recommended Wire Length and Wire Diameter for Power Supply System
Outdoor unit
U-72MF1U9
U-72MF1U9E
U-96MF1U9
U-96MF1U9E
Indoor unit
Type
K1
D1, U1, Y1, F1, M1, T1, P1, R1
E1
Control wiring
(A) Inter-unit (between outdoor and
indoor units) control wiring*
AWG #18 (0.75 mm²)
Max. 3,280 ft.
NOTE
* With ring-type wire terminal.
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
AWG #18 (0.75 mm²)
Max. 1,640 ft.
28
(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:
●
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 required.
(C) Control wiring for group control
AWG #18 (0.75 mm²)
Max. 650 ft. (Total)
(D) Inter-outdoor unit control wiring
AWG #18 (0.75 mm²)
Max. 980 ft.