Electrical Work - Mitsubishi Electric SEZ-KC25VA Manuel D'installation

9. Electrical work

9.1. Power supply
Electrical specification
Power supply
(1 phase ~/N, 230V, 50Hz)
Warning:
• The compressor will not operate unless the power supply phase connection
is correct.
• Grounding protection with a no-fuse breaker (earth leakage breaker [ELB]) is
usually installed for D D D D D .
• The connection wiring between the outdoor and indoor units can be extended
up to a maximum of 50 meters, and the total extension including the crosso-
ver wiring between rooms is a maximum of 80 m.
A switch with at least 3 mm contact separation in each pole shall be provided
by the air conditioner installation.
* Label each breaker according to purpose (heater, unit etc.).
[Fig. 9-1] (P.4)
A Indoor unit
B Outdoor unit
C Wired remote controller
D Main switch/fuse
E Grounding
9.2. 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. (Pro-
cure 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 bed securely so that no
stress is applied to the connecting section of the terminal bed. Incomplete
connection or fixing of the wire could result in a fire.
• The wiring configuration of the indoor unit's fan motor is for a 50 Hz power
supply. The wiring must be reconfigured if a 60 Hz power supply is used.
Refer to the wiring diagram for details.
[Fig. 9-2] (P.4)
A Entry for remote controller cable
B Entry for Indoor-Outdoor connecting cable
C Cable clamp
D Remote controller terminal
E Power board
F Indoor/Outdoor unit connecting terminal
G To wired remote controller
H Earth cable
I To outdoor unit
J Indoor controller
• 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.
[Fig. 9-3] (P.4)
A Indoor terminal block
B Earth wire (green/yellow)
C Indoor/outdoor unit connecting wire 3-core 1.5 mm
D Outdoor terminal block
E Power supply cord : 2.0 mm
2
or more
1 Connecting cable
Cable 3-core 1.5 mm 2 , in conformity with Design 245 IEC 57.
2 Indoor terminal block
3 Outdoor terminal block
4 Always install an earth wire (1-core 1.5 mm
5 Remote controller cable
Wire No × size (mm ) : Cable 2C × 0.69
2
This wire accessory of remote controller
(wire length : 10m, non-polar)
6 Wired remote controller
7 Power supply cord
Cable 3-core 2.0 mm 2 or more, in conformity with Design 245 IEC 57.
• Connect the terminal blocks as shown in the diagram below.
(1) Use care not to make mis-wiring.
(2) Firmly tighten the terminal screws to prevent then from loosening.
Input capacity Main Switch/Fuse (A)
10
2 or more
2 ) longer than other cables
(3) After tightening, pull the wires lightly to confirm that they do not move.
9.3 Selecting the power source
It is 240V, 230V setting at factory shipment.
So, it is necessary to change the setting in other power supply districts.
Please remove the connector of motor from the control box, and insert the attach-
ment connector according to each power supply between those.
The connector colors are as follows.
Power source 240V
Color White
[Fig. 9-4] (P.4)
A Terminal bed box connector (White)
B Motor connector (White)
C Attachment connector (Blue) (Accessory)
9.4. Remote controller
9.4.1. For wired remote controller
1) Installing procedures
(1) Select an installing position for the remote controller.
The temperature sensors are located on both remote controller and indoor unit.
s Procure the following parts locally:
Two piece switch box
Thin copper conduit tube
Lock nuts and bushings
[Fig. 9-5] (P.4)
A Remote controller profile
B Required clearances surrounding the remote controller
C Installation pitch
(2) Seal the service entrance for the remote controller cord with putty to prevent pos-
sible invasion of dew drops, water, cockroaches or worms.
[Fig. 9-6] (P.5)
A For installation in the switch box:
B For direct installation on the wall select one of the following:
• Prepare a hole through the wall to pass the remote controller cord (in order to run the remote
controller cord from the back), then seal the hole with putty.
• Run the remote controller cord through the cut-out upper case, then seal the cut-out notch
with putty similarly as above.
C Wall
D Conduit
E Lock nut
F Bushing
B-1. To lead the remote controller cord from the back of the controller:
B-2. To run the remote controller cord through the upper portion:
(3) For direct installation on the wall
2) Connecting procedures
1 Connect the remote controller cord to the terminal block.
[Fig. 9-7] (P.5)
A To the terminal block on the indoor unit
B TB6 (No polarity)
C Dip switches
2 Set the dip switch No.1 shown below when using two remote controller's for the
same group.
3) 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.
9.5. Outdoor unit
[Fig. 9-8] (P.5)
• Connect cable from the indoor unit correctly on the terminal-block.
• Use the same terminal block and polarity as is used with the indoor unit.
• For aftercare maintenance, give extra length to connecting cable.
• Both end of connecting cable (extension wire) are peeled off. When too long,
or connected by cutting off the middle, peel off power supply cable to the size
given in the figure.
• Be careful not to contact connecting cable with piping.
[Fig. 9-9] (P.5)
A Loosen terminal screw
B Terminal block
C Lead wire
Caution:
• Use care not to make mis-wiring. (Fig. 9-9)
• Firmly tighten the terminal screws to prevent them from loosening.
• After tightening, pull the wires lightly to confirm that they do not move.
230V 220V
Blue
G Switch box
H Remote controller cord
I Seal with putty
J Wood screw
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