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P5417054
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8.3 Position of Electrical Wiring Connection
●
The electrical wiring connection for the indoor unit is shown in Section 8.2.2. For details relating to the
intermediate connections between the indoor unit and the decorative panel, refer to the "Installation and
Maintenance Manual" for the 4-Way Cassette Decorative Panel.
● The connection at the terminal block for the indoor unit is shown in the figure below. Check the
arrangement for the outdoor unit before performing any wiring. Tighten screws in the terminal block as
indicated in the torque specification table shown below.
1. Connect the cable for the optional controller or the optional extension cable to the terminals inside the
electrical box through the connecting hole of the cabinet.
2. Connect the power supply and the ground wiring to the terminals in the electrical box.
3. Connect the cables between the indoor unit and the outdoor unit to the terminals inside the electrical box.
4. Connect cables to their corresponding terminal number and the similarly marked band.
5. Connect the communication cable between those indoor units connected to the same outdoor unit.
6. Do not connect the main power supply wiring to the communication line (Terminals A, B, 1 and 2 of
TB2). If connected, the printed circuit board (PCB) will be destroyed.
7. Tightly clamp the power supply wiring and communication cables using the cable band inside the
electrical box.
NOTE:
When the standard wire is used for the field-wiring
connection, the M4 crimping terminal should be used.
When the single wire is used, fashion it into the shape
as shown at right and connect it in order to tighten
the washer uniformly. The screws at the terminal
block should be tightened according to the torque
specification as shown in the table above.
(A)
(B)
(C)
Screw
Tightening Torque for Terminals
Screw Size
Tightening Torque
TB1
M4
0.7 - 1.0
(1.0 - 1.3
ft·lbs
N·m)
TB2
M3.5
0.9
(1.2
ft·lbs
N·m)
Terminal Block for
Power Supply Wiring
TB1 (black)
Terminal Block for
Communication Cable
TB2 (white)
Mp/N
S/L2
R/L1
A
B
1
2
● Do not connect the main power supply wiring to the communication
line (Terminals A, B, 1, and 2 of TB2). If connected, the printed circuit
board (PCB) will be destroyed.
● Pay attention to following when wires are connected at the terminal block:
▫
Attach a piece of insulation tape or a sleeve at each terminal.
▫
Maintain the recommended distance between the electrical box
and the terminals to prevent a short circuit.
▫
Maintain the recommended distance between terminals.
NOTICE
Stranded Wire
Single Wire
Connect it with
Crimping Terminal.
Connect it Direct
As Shown Below.