6
4. Electrical work
4.1. Indoor unit (Fig. 4-1)
1.Remove 2 screws to detach the electric component cover.
2.Route each cable through the wiring intake into the electric component box. (Pro-
cure power supply cable and control cable locally.)
3.Securely connect the power supply cable and control cable to the terminal blocks.
4.Secure the cables with clamps outside the electric component box.
5.Attach the electric component cover as it was.
• Do not allow slackening of the terminal screws.
• Always install earth.
(Earth cable dia: Thicker than 1.6 mm)
• Fix power supply cable and control cable to electric component box by using buffer
bushing for tensile forse. (PG connection or the like.)
s
s
s
s
s
Selecting non-fuse breaker (NF) or earth leakage breaker (NV).
A means for the disconnection of the supply with an isolation switch, or similar de-
vice, in all active conductors shall be incorporated in the fixed wiring.
Power supply wiring
• Power supply codes of appliance shall not be lighter than design 245 IEC 53 or 227
IEC 53.
• A switch with at least 3 mm contact separation in each pole shall be provided by the
air conditioner installation.
Power cable size: more than 1.5 mm
2
.
Fig. 4-1
Fig. 4-2
1
2
A
A
C
TB5
TB15 TB5
TB15
S
M1 M2
S
M1 M2
B
TB3
M1 M2
2
1
C
2
1
A
A
C
TB5
TB5
S
M1 M2
S
M1 M2
C
B
TB3
M1 M2
4.2. Connecting remote controller, indoor and outdoor
transmission cables (Fig. 4-2)
• Connect indoor unit TB5 and outdoor unit TB3. (Non-polarized 2-wire)
The “S” on indoor unit TB5 is a shielding wire connection. For specifications about
the connecting cables, refer to the outdoor unit installation manual.
• Install a remote controller following the manual supplied with the remote controller.
• Connect the remote controller’s transmission cable within 10 m using a 0.75 mm
2
core cable. If the distance is more than 10 m, use a 1.25 mm
2
junction cable.
1
MA Remote controller
• Connect the “1” and “2” on indoor unit TB15 to a MA remote controller. (Non-polar-
ized 2-wire)
• DC 9 to 13 V between 1 and 2 (MA remote controller)
2
M-NET Remote controller
• Connect the “M1” and “M2” on indoor unit TB5 to a M-NET remote controller. (Non-
polarized 2-wire)
• DC 24 to 30 V between M1 and M2 (M-NET remote controller)
A
Terminal block for indoor transmission cable
B
Terminal block for outdoor transmission cable
C
Remote controller
Constraints on transmission cable (Fig. 4-3)
Longest wiring length (L
1
+L
2
+L
4
or L
1
+L
3
or L
2
+L
3
+L
4
): less than 200 m
Length between indoor unit and remote controller (
R
): within 10 m
G
Outdoor unit
H
Earth
I
BC controller
J
Indoor unit
K
M-NET Remote controller
L
Non-polarized 2-wire
Note:
*1 Put the transmission cable earth via the outdoor unit’s earth terminal
to
the ground.
*2 If the remote controller cable exceeds 10 m, use a 1.25 mm
2
diameter cable
over the exceeded portion, and add that exceeded portion to within 200 m.
*3 The BC controller is required only for simultaneous cooling and heating
series R2.
4.3. Setting addresses (Fig. 4-4)
(Be sure to operate with the main power turned OFF.)
• There are two types of rotary switch setting available: setting addresses 1 to 9 and
over 10, and setting branch numbers.
Fig. 4-3
Fig. 4-4
G
I
J
J
J
K
K
K
K
J
J
L
K
H
*1
*3
L1
L2
L4
r
L3
*2
A
Electric component cover
B
Electric component box
C
Entry for power supply cable
D
Entry for control cable
E
Cable clamp
F
Power supply terminals
G
Transmission terminals
H
MA Remoto controller terminal
I
Indoor controller
J
Power board
123456
ON
OFF
ON
OFF
SW1
SW2
SW3
SW4
12345
ON
OFF
12345678910
12345678910
SW11
0
SW12
0
SW14
0
CONNECTION
No.
3RD
DIGIT
2ND
DIGIT
1ST
DIGIT
