Panasonic S-15MY2E5A CZ-KPY3A Technical Data Manual Download Page 6

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2-5

Design of VRF SYSTEMS

1. Electrical Wiring

Shielded wire

Ground

Screw and

Special washer

Ring

pressure

terminal

Terminal board

Ring pressure

terminal

Screw

Special

washer

Wire

Insulation tape

8mm

Insulation tape

Shield mesh

Fig. 2-5

Stranded wire

Ring

pressure

terminal

Strip 10 mm

Fig. 2-6

Fig. 2-7

Fig. 2-8

Fig. 2-9

Fig. 2-10

Fig. 2-11

(5) Use shielded wires for inter-unit control wiring (C) and

ground the shield on both sides, otherwise misoperation
from noise may occur. (Fig. 2-5)
Connect wiring as shown in Section “1-3. Wiring System
Diagrams”.

(6) Connecting cable between indoor unit and outdoor unit shall be approved polychloroprene sheathed

5 or 3 *1.5 mm

flexible cord. Type designation 60245 IEC 57 (H05RN-F, GP85PCP etc.) or heavier

cord.

WARNING

Loose wiring may cause the terminal to overheat or result in unit malfunction.
A fire hazard may also occur.
Therefore, ensure that all wiring is tightly connected.

When connecting each power wire to the terminal, follow the instructions on “How to connect wiring to the terminal”

and fasten the wire securely with the fixing screw of the terminal board.

How to connect wiring to the terminal

For stranded wiring

(1)

then strip the insulation to expose

the stranded wiring about 10 mm and

tightly twist the wire ends. (Fig. 2-6)

(2)

remove the terminal screw(s) on the

terminal board.

(3)

pliers, securely clamp each stripped

wire end with a ring pressure terminal.

(4)

Cut the wire end with cutting pliers,

Using a Phillips head screwdriver,

Using a ring connector fastener or

Place the ring pressure terminal,

and replace and tighten the removed

terminal screw using a screwdriver.

(Fig. 2-7)

Examples of shield wires

(1)
(2)

together.

Coat with insulation tube or wrap insulation tape after

putting tightly. (Fig. 2-9)

(3)
(4)

Remove cable coat not to scratch braided shield. (Fig. 2-8)
Ravel braided shield carefully and put tightly braided shield

Remove coat of signal wire. (Fig. 2-10)
Connect signal wire removed coat and shield wire with

pressure terminal. (Fig. 2-11)

Earth wire for power supply

The earth wire should be longer than the other lead wires for

electrical safety.

Use the standard power supply cables for Europe (such as H05RN-F or H07RN-F which conform to
CENELEC (HAR) rating specifications) or use the cables based on IEC standard. (60245 IEC57, 60245
IEC66)

2-4

(1)

(2)

When linking the outdoor units in a network, disconnect the terminal extended from the short plug from
all outdoor units except any one of the outdoor units.
(When shipping: In shorted condition.)
For a system without link (no wiring connection between outdoor units), do not remove the short plug.
Do not install the inter-unit control wiring in a way that forms a loop.

Outdoor unit

Branch point

Outdoor unit

Prohibited

Indoor unit

CAUTION

(3) Do not install inter-unit control wiring such as star branch wiring. Star branch wiring causes mis-address

setting.

(4) If branching the inter-unit control wiring, the number of branch points should be 16 or fewer.

Fig. 2-2

Fig. 2-3

Fig. 2-4