Mitsubishi Electric Mr. SLIM PEAD-SM71JA Manuel D'installation page 18

8. Electrical work
8.2. Indoor wire connection
Work procedure
1. Remove 2 screws to detach the electric component cover.
2. Route each cable through the wiring intake into the electric component box.
(Procure power cable and in-out connecting cable locally and use remote control
cable supplied with the unit.)
3. Securely connect the power cable and the in-out connecting cable and the remote
control cable to the terminal blocks.
4. Secure the cables with clamps inside the electric component box.
5. Attach the electric component cover as it was.
• Fix power supply cable and indoor/outdoor cable to control box by using buffer
bushing for tensile force. (PG connection or the like.)
Warning:
• Attach the electrical part 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 wire to connect the indoor
and outdoor units and fix the wire 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 wire could result in a fire.
[Fig. 8-2-1] (P.7)
A Screw holding cover (1pc)
B Cover
[Fig. 8-2-2] (P.7)
C Terminal box
D Knockout hole
E Remove
[Fig. 8-2-3] (P.7)
F 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.
G Power source wiring
H Use ordinary bushing
I Transmission wiring
[Fig. 8-2-4] (P.7)
J Terminal block for power source and indoor transmission
K Terminal block for remote controller
• Perform wiring as shown in [Fig. 8-2-4]. (Procure the cable locally.)
Make sure to use cables of the correct polarity only.
[Fig. 8-2-5] (P.7)
A Indoor terminal block
B Earth wire (green/yellow)
C Indoor/outdoor unit connecting wire 3-core 1.5 mm
D Outdoor terminal block
2
E Power supply cord : 2.0 mm or more
a Connecting cable
2
Cable 3-core 1.5 mm , in conformity with Design 245 IEC 57.
b Indoor terminal block
c Outdoor terminal block
d Always install an earth wire (1-core 1.5 mm
e Remote controller cable
2
Wire No × size (mm ) : Cable 2C × 0.3
This wire accessory of remote controller
(wire length : 10 m, non-polar. Max. 500 m)
f Wired remote controller (option)
g Power supply cord
2
Cable 3-core 2.0 mm or more, in conformity with Design 245 IEC 57.
• Connect the terminal blocks as shown in [Fig. 8-2-5].
Caution:
• Use care not to make mis-wiring.
• Firmly tighten the terminal screws to prevent them from loosening.
• After tightening, pull the wires lightly to confirm that they do not move.
18
2
or more
2
) longer than other cables
8.3. Remote controller (wired remote controller (option))
8.3.1. For wired remote controller
1) Installing procedures
Refer to the installation manual that comes with each remote controller for details.
2) Function selection of remote controller
If two remote controllers are connected, set one to "Main" and the other to "Sub". For
setting procedures, refer to "Function selection of remote controller" in the operation
manual for the indoor unit.
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 streight 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] (P.8)
Indoor/outdoor wiring
Signal receiving unit wiring
A Outdoor unit
B Refrigerant address
C Indoor unit
D Signal receiving unit
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
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.
2) Installing procedures
Refer to the installation manual that comes with each remote controller for details.
8.4.3. Setting
1) Setting the pair number switch
[Fig. 8-4-2] (P.8)
<Indoor controller board>
1. Setting method
Assign the same pair number to the wireless remote controller as that of the
indoor unit. If not doing so, the remote controller cannot be operated. Refer to the
installation manual that came with the wireless remote controller for how to set
pair numbers of wireless remote controllers.
Position of daisy wire on the controller circuit board on the indoor unit.
Controller circuit board on the indoor unit (reference)
[Fig. 8-4-2] (P.8)
A CN90: Connector for remote controller wire connection
For pair number settings, the following 4 patters (A-D) are available.
Pair number Pair number on
setting pattern remote controller side
A 0
B 1
C 2
D 3~9
Indoor controller circuit board side Point
where the daisy wire is disconnected
Not disconnected
J41 disconnected
J42 disconnected
J41 and J42 disconnected