Electrical Work - Mitsubishi Electric PEAD-A09AA8 Installation Manual

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.6)
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.
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
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
16
[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
J Conduit
K Side frame
L Knockout hole (for power source wiring)
M Washer (accessory)
[Fig. 8-2-4] (P.7)
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)
PEAD
S Wiring for radio frequency interface
–
• Perform wiring as shown in the diagram to the lower left. (Procure the cable locally.)
–
Make sure to use cables of the correct polarity only.
3 × 1.5 (polar)
[Fig. 8-2-5] (P.7)
1 × Min. 1.5
A Indoor terminal block
*1 2 × 0.3 (Non-polar)
B Earth wire (green/yellow)
C Indoor/outdoor unit connecting wire 3-core 1.5 mm
*2 –
D Outdoor terminal block
*2 230 V AC
1 Connecting cable
*2 24 V DC
Cable 3-core 1.5 mm
2 Indoor terminal block
*2 14 V DC
3 Outdoor terminal block
4 Always install an earth wire (1-core 1.5 mm
5 Wired remote controller cable
Wire No  size (mm
This wire accessory of remote controller
(wire length : 10 m [32 ft], non-polar. Max. 500 m [1640 ft])
6 Wired remote controller
• Connect the terminal blocks as shown in the diagram below.
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.
8.3. Remote controller
8.3.1. For wired remote controller
1) Two wired remote controllers setting
If two wired 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.
8.3.2. For IR wireless remote controller
1) Installation area
• Area in which the IR wireless remote controller is not exposed to direct sunshine.
• Area in which there is no near by heating source.
• Area in which the IR wireless remote controller is not exposed to cold (or hot)
winds.
• Area in which the IR wireless remote controller can be operated easily.
• Area in which the IR wireless remote controller is beyond the reach of children.
* The signal can travel up to approximately 7 meters [23 ft] (in a straight line) within 45
degrees to both right and left of the center line of the receiver.
2) Setting the Model No.
[Fig. 8-3-1] (P.8)
1 Insert batteries.
2 Press the SET button with something sharp at the end.
Start this operation from the status of IR wireless remote controller display
turned off.
MODEL SELECT
3 Press the temp
4 Press the SET button with something sharp at the end.
MODEL SELECT
2
2
[AWG 16], in conformity with Design 245 IEC 57.
2
[AWG 16]) longer than other cables
2 ) : Cable 2C  0.3
blinks and Model No. (A) is lighted.
button to set the Model No. (A).
and Model No. (A) are lighted for three seconds, then turned off.
Indoor Unit Model
PEAD
[AWG 16] or more
Model No. (A)
026