9
8. Electrical work
8.3. Connecting electrical connections
Verify that the model name on the operating instructions on the cover of the control
box is the same as the model name on the nameplate.
1. Remove the 2 screws holding the terminal box cover in place.
[Fig. 8-3-1]
Note:
Ensure that the wiring is not pinched when fitting the terminal box cover.
Pinching the wiring may cut it.
Caution:
Install wiring so that it is not tight and under tension. Wiring under tension
may break, or overheat and burn.
2. Open knockout holes
(Recommend to use a screwdriver or the like for this work.)
[Fig. 8-3-2]
3. Fix power source wiring to control box by using buffer bushing for tensile force.
(PG connection or the like.) Connect transmission wiring to transmission terminal
block through the knockout hole of control box using ordinary bushing.
4. Connect the power source, Earth, transmission and remote controller wiring. The
dismounting of the terminal bed box is not needed.
[Fig. 8-3-3]
[Transmission cable connection]
[Fig. 8-3-4]
5. After wiring is complete, make sure again that there is no slack on the connec-
tions, and attach the cover onto the control box in the reverse order removal.
Notes:
• Do not pinch the cables or wires when attaching the terminal bed box cover.
Doing so may cause a risk of disconnection.
• When accommodating the terminal bed box, make sure that the connectors
on the box side are not removed. If removed, it cannot operate normally.
8.4. Remote controller (wireless remote controller
(option))
8.4.1. For wireless remote controller (option)
1) Installation area
• Area in which the remote controller is not exposed to direct sunshine.
• Area in which there is no near by heating source.
• Area in which the remote controller is not exposed to cold (or hot) winds.
• Area in which the remote controller can be operated easily.
• Area in which the remote controller is beyond the reach of children.
* The signal can travel up to approximately 7 meters (in a straight line) within 45
degrees to both right and left of the center line of the receiver.
2) Installing procedures
Refer to the installation manual that comes with each remote controller for details.
8.4.2. Signal Receiving Unit
1) Sample system connection
[Fig. 8-4-1]
Only the wiring from the signal receiving unit and between the remote controllers is
shown in [Fig. 8-4-1]. The wiring differs depending on the unit to be connected or the
system to be used.
For details on restrictions, refer to the installation manual or the service handbook
that came with the unit.
1. Connecting to Mr. SLIM air conditioner
(1) Standard 1:1
2) Installing procedures
Refer to the installation manual that comes with each remote controller for details.
A
Screw holding cover (2pcs)
B
Cover
A
Control box
B
Knockout hole
C
Remove
E
Use PG bushing to keep the weight of the cable and external force from being applied to the
power supply terminal connector. Use a cable tie to secure the cable.
Wind the wire around the cable strap once to keep it from being pulled out.
F
Power source wiring
G
Tensile force
H
PG connection or the like.
A
B
A
B
C
F
O
M
L
L
N
S3
S2
S1
N
E
H
I
J
K
S1
S2 S3
1 2
L
N
G
I
Power source terminal bed
J
Terminal bed for indoor transmission
K
Terminal bed for remote controller
L
To 1-phase power source
M
Transmission line
N
Terminal bed for outdoor transmission line
O
Transmission line to the remote controller
A
Terminal bed
B
Round terminal
C
Transmission cable (polar)
1
Signal receiving unit wiring
2
Indoor/outdoor wiring
A
Outdoor unit
B
Refrigerant address
C
Indoor unit
D
Signal receiving unit
a
Connecting the signal receiving unit
Connect the signal receiving unit to the CN90 (Connect to the wireless remote
controller board) on the indoor unit using the supplied remote controller wire.
Connect the signal receiving units to all the indoor units.
S2
S3
S1
A
B
C
IC
OC(00)
CN90
TB1
TB4
①
②
D
C
A
B
Standard 1:1
WT09638X02.book 9 ページ ２０２０年１０月６日 火曜日 午後４時８分
