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7. Duct work
• When connecting ducts, insert a canvas duct between the main body and the duct.
• Use non-combustible duct components.
Caution:
The noise from the intake will increase dramatically if intake A A A A A is fitted
•
directly beneath the main body. Intake A A A A A 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.
•
To connect the air conditioner main body and the duct for potential equali-
zation.
8. Electrical work
8.1. Power supply
Electrical specification
Input capacity Main Switch/Fuse (A)
Power supply
SEZ-KD25 SEZ-KD35 SEZ-KD50 SEZ-KD60 SEZ-KD71
(1 phase ~/N, 230V, 50Hz)
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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. 8-1] (P.4)
A Indoor unit
B Outdoor unit
C Wired remote controller
D Main switch/fuse
E Grounding
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. (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.
[Fig. 8-2-1] (P.4)
A Screw holding cover (2pcs)
B Cover
[Fig. 8-2-2] (P.4)
A Terminal bed box
B Knockout hole
C Remove
[Fig. 8-2-3] (P.4)
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.
F Indoor/outdoor unit connecting wire
G Tensile force
H Use ordinary bushing
I Transmission wiring
10
20
20
20
•
Keep the distance between the inlet grille and the fan over 850 mm.
If it is less than 850 mm, install a safety guard not to touch the fan.
[Fig. 7-1] (P.4)
A Air inlet
B Air outlet
C Access door
D Ceiling surface
E Canvas duct
F Air filter
G Inlet grille
[Fig. 8-2-4] (P.4)
J Terminal bed for power source and indoor transmission
K Terminal bed for remote controller
L Indoor/outdoor unit connecting wire
M Transmission line to the remote 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. 8-3] (P.5)
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
1 Connecting cable
2
Cable 3-core 1.5 mm
, 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 × 0.3
2
This wire accessory of remote controller
(wire length : 10 m, non-polar. Max. 500 m)
6 Wired remote controller (option)
7 Power supply cord
• 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 (option)
8.3.1. 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. 8-4] (P.5)
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. 8-5] (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
or more
2
) longer than other cables
G Switch box
H Remote controller cord
I Seal with putty
J Wood screw
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