7
Fig. 7-3
G
I
J
J
J
K
K
K
K
J
J
L
K
H
*1
*3
L1
L2
L4
r
L3
*2
7. Electrical work
A
Power supply terminal block (TB2)
B
Outdoor unit terminal block (TB5)
7.1. Indoor unit (Fig. 7-1)
1
Remove the electrical cover.
• Remove one screw holding the electrical cover, then move the cover.
• Remove one screw holding the cord clamp, then move the clamp.
2
Connect the power line, control line from the outdoor unit, and remote con-
trol lines.
After connecting, secure the wires with the cord clamp.
s
Fix power source wiring to control box using buffer bushing for tensile force.
(PG connection or the like.)
• Since the electric box may need to be pulled out for servicing or other occasions,
wires must have enough slack.
• Class 3 grounding work must be conducted (grounding wire diameter: 1.6 mm or
more)
After wiring is completed, reinstall the parts in the reverse order of removal.
Note:
•
Power supply codes of appliance shall not be lighter than design 60245 IEC
53 or 60227 IEC 53.
•
Install an earth longer and thicker than other cables.
•
Power cable size: more than 1.5 mm
2
.
•
A means for the disconnection of the supply with an isolation switch, or simi-
lar device, in all active conductors shall be incorporated in the fixed wiring.
•
Selecting non-fuse breaker (NF) or earth leakage breaker (NV).
•
A switch with at least 3 mm contact separation in each pole shall be provided
by the air conditioner installation.
Warning:
Wiring should be done so that the power lines are not subject to tension. Oth-
erwise, heat may be generated or fire may occur.
7.2. Connecting remote controller, indoor and outdoor
transmission cables (Fig. 7-2)
• 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 connector for MA remote controller. (Non-polarized 2-wire)
• DC 9 to 13 V between 1 and 2 (MA remote controller)
a
MA remote controller cable (ACCESSORY
9
)
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
Fig. 7-1
Fig. 7-2
1
2
A
A
C
TB5
TB5
S
M1 M2
S
M1 M2
C
B
TB3
M1 M2
B
A
Constraints on transmission cable (Fig. 7-3)
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.
A
A
C
a
TB5
TB5
TB15
S
M1 M2
S
M1 M2
B
TB3
M1 M2
CN3A
C
2
1
Indoor controller board
