Electrical Wiring (Only For Package Outdoor Units); General Precautions On Wiring; Recommended Wire Length And Wire Diameter For Power Supply System - Technibel CAV254R5TAA Installation Manual

5. ELECTRICAL WIRING (Only for PACKAGE Outdoor Units)

5-1. 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 and circuit breaker
for overcurrent protection should be provided in the
exclusive line.
(3) To prevent possible hazards due to 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.

5-2. Recommended Wire Length and Wire Diameter for Power Supply System

Indoor Unit
(A) Power Supply Time Delay Fuse
2
2.5 mm or Circuit Capacity
245 m 15 A
Control wiring
(C) Inter-Unit Control Wiring
2
0.75 mm (AWG#18)
Use Shielded Wiring
Max. 1000 m
NOTE
1) Refer to the Wiring System Diagrams of outdoor uinit for
the meaning of "A", "B", "C", "D", "E" in the above tables.
2) Inter-Unit Control Wiring (c) has no polarity.
But for other wiring, respect polarity.
Be sure to connect as shown in the Wiring System Diagram.
3) The basic connection diagram of the indoor unit shows the
8P terminal board, so the terminal boards in your equipment
may differ from the diagram.
WARNING
When connecting each power wire to the corresponding
terminal, follow instructions "How to connect wiring to the
terminal" and fasten the wire securely tight with the fixing screw
of the terminal plate.
How to connect wiring to the terminal
I For stranded wiring
(1) Cut the wire end with a cutting pliers, then strip the insulation
to expose the stranded wiring about 10 mm and tightly twist
the wire ends.
(2) Using a screwdriver, remove the terminal screw(s) on the
terminal plate.
(3) Using a ring connector fastener or pliers, securely clamp
each stripped wire end with a ring connector.
(4) Place the ring connector wire, and replace and tighten the
removed terminal screw using a screwdriver.
Terminal Base
Capacity Max. Wire Diameter
50 A 14 mm
(D) Remote Control Wiring
2
0.75 mm (AWG#18)
Max. 500 m
Loose wiring may cause the
terminal to overheat or
result in unit malfunction.
A fire hazard may also exist.
Therefore, be sure all wiring
is tightly connected.
(6) Unauthorised 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 Unauthorised 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 insure 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:
G The remote control wiring and the inter-unit control wiring
should be wired apart from the inter-unit power wiring.
G Use shielded wires for inter-unit control wiring between
units and ground the shielded 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.
2
(AWG#6)
(E) Control Wiring for Group Control
0.75 mm
Max. 500 m
7P terminal board
U1 U2 R1 R2 R3
Inter-unit Remote
control wiring Controller
Stranded wire
Special
Screw
washer
Ring connector
Terminal plate
Wire
14
2
(AWG#18)
1(L)2(N)
Power
Supply
Ring
connector
Screw and
Special washer
Ring connector
Wire
EG