Duct Work; Electrical Work; Power Supply - Mitsubishi Electric Mr.SLIM PEAD-A09AA7 Manuel D'installation

7. Duct work

• Connect canvas duct between unit and duct. [Fig. 7-0-1] (P.5)
• Use incombustible material for duct parts.
• Provide full insulation to inlet duct flange and outlet duct to prevent condensation.
• Be sure to change the position of air filter to a position where it can be serviced.
<A> In case of rear inlet
<B> In case of bottom inlet
A Duct
B Air inlet
C Access door
D Canvas duct
E Ceiling surface
F Air outlet
G Leave distance enough to prevent short cycle
• Procedure for changing the rear inlet to the bottom inlet. [Fig. 7-0-2] (P.5)
A Filter
B Bottom plate
1. Remove air filter. (First remove filter lock screw.)
2. Remove the bottom plate.
3. Fit the bottom plate to the rear of the body. [Fig. 7-0-3] (P.5)
(Position of lug-holes on the plate are different from those for rear inlet.)
(Tighten the screws of the bottom plate to the torque of 1.4 ±0.2 N·m.)
When the plate is attached on
the rear side, it exceeds the
height of the rear body panel.
Replicate the plate along the slit
when there is not enough room
above for the entire unit.
Screw holes are hidden under
the insulation. Screw through
the insulation to screw the plate
down.

8. Electrical work

8.1. Power supply

8.1.1. Indoor unit power supplied from outdoor unit
The following connection patterns are available.
The outdoor unit power supply patterns vary on models.
1:1 System
[Fig. 8-1-1] (P.5)
A Outdoor unit power supply
B Isolating switch
C Outdoor unit
D Indoor unit/outdoor unit connecting cords
E Wired remote controller
F Indoor unit
G Indoor controller board
H Radio frequency interface for RF thermostat
* Affix a label A that is included with the manuals near each wiring diagram for the
indoor and outdoor units.
Field electrical wiring
Indoor unit model
Indoor unit power supply (Heater)
Indoor unit power supply (Heater) earth
Indoor unit-Outdoor unit
Indoor unit-Outdoor unit earth
Wired remote controller-Indoor unit
Indoor unit (Heater) L-N
Indoor unit-Outdoor unit S1-S2
Indoor unit-Outdoor unit S2-S3
Wired remote controller-Indoor unit
*1. The 10 m [32 ft] wire is attached in the wired remote controller accessory. Max. 500 m [1640 ft]
*2. The figures are NOT always against the ground.
S3 terminal has 24 V DC against S2 terminal. However between S3 and S1, these terminals
are not electrically insulataed by the transformer or other device.
Notes: 1. Wiring size must comply with the applicable local and national
code.
2. Power supply cords and indoor unit/outdoor unit connecting cords
shall not be lighter than polychloroprene sheathed flexible cord.
(Design 245 IEC57)
3. Install an earth longer than other cables.
4. Perform wiring in compliance with the safety regulations detailed in
UL1995.
Caution:
Do not use anything other than the correct capacity fuse. Using fuse, wire or
copper wire with too large capacity may cause a risk of malfunction or fire.
Caution:
Take measures to prevent electrical leakage as required.
4. Fit filter to the underside of the body.
(Be careful of which side of the filter to fit.) [Fig. 7-0-4] (P.5)
C Nail for the bottom inlet
D Nail for the rear inlet
Caution:
• Inlet duct of 850 mm [33-1/2 in] or more should be construted.
To connect the air conditioner main body and the duct for potential
equalization.
• To reduce the risk of injury from metal sheet edges, wear protective gloves.
• To connect the air conditioner main body and the duct for potential
equalization.
• The noise from the intake will increase dramatically if intake is fitted directly
beneath the main body. Intake should therefore be installed as far away from
the main body as possible.
Particular care is required when using it with bottom inlet specifications.
• Install sufficient thermal insulation to prevent condensation forming on
outlet duct flanges and outlet ducts.
• Keep the distance between the inlet grille and the fan over 850 mm [33-1/2 in].
If it is less than 850 mm [33-1/2 in], install a safety guard not to touch the fan.
• To avoid electrical noise interference, do not run transmission lines at the
bottom of the unit.
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 wired remote
control cable supplied with the unit.)
3. Securely connect the power cable and the in-out connecting cable and the wired
remote control cable to the terminal blocks.
4. For radio frequency interface
Connect the electric wires securely to the CN105 (RED) of indoor controller board.
Connect the electric wires securely to the corresponding terminals.
5. Secure the cables with clamps inside the electric component box.
6. Attach the electric component cover as it was.
(Tighten the screws of the terminal box cover to the torque of 2.0 ±0.2 N·m.)
• 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
PEAD
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
3 × 1.5 (polar)
stress is applied to the connecting section of the terminal block. Incomplete
connection or fixing of the wire could result in a fire.
1 × Min. 1.5
[Fig. 8-2-1] (P.6)
*1 2 × 0.3 (Non-polar)
A Screw holding cover (1pc)
*2 –
B Cover
*2 230 V AC
[Fig. 8-2-2] (P.6)
*2 24 V DC
C Terminal box
*2 14 V DC
D Knockout hole
E Remove
[Fig. 8-2-3] (P.6)
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
J Conduit
K Side frame
L Knockout hole (for power source wiring)
M Washer (accessory)
[Fig. 8-2-4] (P.6)
N Terminal block for power source and indoor transmission
O Terminal block for wired remote controller
P Indoor controller board
Q Radio frequency interface is installed on Indoor controller board
R CN105 (RED/5P)
S Wiring for radio frequency interface
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