Mitsubishi Electric TRANE NTXCKS09A112A Serie Manual De Instalación página 8

7. Electrical work
7.1. Indoor unit power supplied from outdoor unit
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
B C
A
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
If AWG13 (2.5 mm 2 ) 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 figures 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 flexible 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 influenced by electric noise from
power source wiring.
Warning:
Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fire or communication failure.
A A
G
B B
A Electric component cover
B Electric component box
C Entry for Indoor-Outdoor connecting cable
D Entry for wired remote controller cable
E Cable clamp
Fig. 7-1
8
D G
L1
L2
GR
S1 S1
S2 S2
S3 S3
E
1
F
2
*1
*1
*2
*3
*3
*3
*3
C
D
H
F
F Indoor/Outdoor unit connecting terminal
G Wired remote controller terminal
H Indoor controller
I Earth cable
1:1 System
A Outdoor unit power supply
B Earth leakage breaker
C Wiring circuit breaker or isolating switch
D Outdoor unit
E Indoor unit/outdoor unit connecting cables
F Remote controller
G Indoor unit
NTXCKS09, 12, 15, 18A112A
3 × AWG16 (polar)
1 × Min. AWG16
1 × Min. AWG16
2 × AWG22 (Non-polar)
—
208/230 VAC
24 VDC
12 VDC
7.2. Indoor unit (Fig. 7-1) (Fig. 7-2) (Fig. 7-3)
Work procedure
1. L oosen the two screws securing the electric component cover, and then slide and
remove the cover.
2. Route the wires along the wiring routes and through the wire inlets in the electric
component box.
(Procure the power supply cord and indoor/outdoor unit connecting cable locally.)
3. S ecurely connect the power supply cord and the indoor/outdoor unit connecting
cable to the terminal block.
4. S ecure the wires with the cable straps inside the electric component box.
Secure the wires with cable straps as cushioning components so that no stress is
applied to the connecting sections of the terminal block when tension is generated.
5. I nstall the electric component cover.
Make sure that the wires do not get pinched.
• Do not allow slackening of the terminal screws.
• Tape is affixed over the conduit hole used for connecting the electric wiring.
Please remove this tape if making a connection through the hole.
Warning:
• Insert hook the electric component cover into the bent support on the electric
component box and attach the cover securely. If it is attached incorrectly, it
could result in a fire, electric shock due to dust, water, etc.
• Use the specified indoor/outdoor unit connecting cable to connect the indoor
and outdoor units and fix the cable to the terminal block securely so that no
stress is applied to the connecting section of the terminal block. Incomplete
connection or fixing of the cable could result in a fire.