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7. Electrical work
Indoor unit model
Indoor unit-Outdoor unit
Indoor unit-Outdoor unit earth
Indoor unit earth
Remote controller-Indoor unit
Indoor unit (Heater) L-N
Indoor unit-Outdoor unit S1-S2
Indoor unit-Outdoor unit S2-S3
Remote controller-Indoor unit
*1. <For 09-18 outdoor unit application>
Max. 45 m, 148 ft
2
If AWG13 (2.5 mm
) used, Max. 50 m, 165 ft
2
If AWG13 (2.5 mm
) used and S3 separated, Max. 80 m, 263 ft
*2. Max. 500 m, 1640 ft.
(When using 2 remote controllers, the maximum wiring length for the remote controller cables is 200 m, 656 ft.)
*3. The fi gures are NOT always against the ground.
S3 terminal has 24 VDC against S2 terminal. However between S3 and S1, these terminals are not electrically insulated by the transformer or other device.
Notes: 1. Wiring size must comply with the applicable local and national code.
2. Power supply cords and indoor unit/outdoor unit connecting cords shall not be lighter than polychloroprene sheathed fl exible cord. (Design 60245 IEC 57)
3. Install an earth longer than other cables.
4. Indoor and outdoor connecting wires have polarities. Make sure to match the terminal number (S1, S2, S3) for correct wirings.
5. Wiring for remote controller cable shall be apart (5 cm, 2 inch or more) from power source wiring so that it is not infl uenced by electric noise from
power source wiring.
6. This appliance incorporates an earth connection for functional purpose only.
Warning:
Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fi re or communication failure.
7.1.2. In case of connecting to Branch Box (For example PAC-MKA**BC), use below information for calculating "F2" and "G1".
For detail, please refer to Branch Box installation manual.
Indoor unit
NTXCKS.A112BA
A
E
9
*1
*1
*2
*3
*3
*3
*3
V1
V2
17.1
2.4
D
Fig. 7-4
C
Fig. 7-5
D
Fig. 7-6
NTXCKS.A112BA
3 × AWG16 (polar)
1 × Min. AWG16
1 × Min. AWG16
2 × AWG22 (Non-polar)
—
208/230 VAC
24 VDC / 28 VDC
12 VDC
7.1.3. Installing the i-See sensor and signal receiver
Before installing the grille, connect the junction wires included with the grille acces-
sories and place them in the connector box.
1 Remove the two screws securing the wire cover of the main unit, and then open
the cover.
2 Route the wires of the i-See sensor and signal receiver through the wire inlets in
the electric component box as shown in the diagram and around the bushings on
the side of the main unit. (Fig. 7-4)
When routing the wires, open the clamp securing the grille junction wire, and then
secure the grille junction wire and the wires of the i-See sensor and signal receiver
with the clamp.
3 Remove the one screw securing the connector box cover, and then open the cover.
(Fig. 7-5)
4 Place the junction wire connector in the connector box.
5 Install the wire cover and connector box cover.
Caution:
When installing the covers, make sure that the wires do not get pinched.
B
Fit the band securing the junction wires between the ribs on the connector box
as shown in the diagram. (Fig. 7-6)
A Wire cover
B Connector box cover
C Connector box
D i-See sensor or signal receiver lead wire (Grille accessory)
E Band
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