Design Of Vrf Systems; Electrical Wiring; General Precautions On Wiring; Recommended Wire Length And Wire Diameter For Power Supply System - Panasonic S-15MY2E5A Technical Data Manual

1. Electrical Wiring

1. Electrical Wiring

1-1. 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.
Earth Leakage Circuit Breaker (ELCB) must be
incorporated in the fixed wiring in accordance with the
wiring regulations. The Earth Leakage Circuit Breaker
(ELCB) must be an approved 10-16 A, having a
1
contact separation in all poles.
(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
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unit to misoperate or become damaged.

1-2. Recommended Wire Length and Wire Diameter for Power Supply System

Indoor unit
3
Type
K2
Y2
K1
4
U1
F2
T2
E2
M1
5
Control wiring
(C) Inter-unit control wiring
(between outdoor and indoor units)
0.75 mm² (AWG #18)
6
Use shielded wiring*
Max. 1,000 m
* With ring-type wire terminal.
NOTE
(E) Control wiring for group control
7
0.75 mm² (AWG #18)
Max. 200 m (Total)
8
9
(B) Power supply
Minimum 2 mm² 2.5 mm²
Max. 150 m
Max. 130 m
Max. 150 m
Max. 130 m
Max. 130 m
Max. 130 m
Max. 30 m
Max. 130 m
(D) Remote control wiring
(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.
(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 designated by the
manufacturer, because special-purpose tools are required.
Time delay fuse or
circuit capacity
15 A
15 A
10 – 16 A
10 – 16 A
10 – 16 A
10 – 16 A
10 – 16 A
10 – 16 A
0.75 mm² (AWG #18)
Max. 500 m
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Design of VRF SYSTEMS

Design of VRF SYSTEMS