7
7. Electrical work
7.1. Precautions (Fig. 7-1)
Electrical specification
Input capacity Main Switch/Fuse (A)
Power supply
(1 phase ~/N, 230 V,
50 Hz)
SLZ-KF25
SLZ-KF35
SLZ-KF50
SLZ-KF60
10
10
20
20
• The compressor will not operate unless the power supply phase connection is cor-
rect.
• Grounding protection with a no-fuse breaker (earth leakage breaker [ELB]) is usually
installed for
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 crossover wiring
between rooms is a maximum of 80 m.
A switch with at least 3.5 mm contact separation in each pole shall be provided by
the air conditioner installation.
* Label each breaker according to purpose (heater, unit etc.).
• Perform wiring as shown in the diagram to the lower left. (Procure the cable locally).
(Fig. 7-2)
Make sure to use cables of the correct polarity only.
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
2
) longer than other cables
5
Remote controller cable (non-polar)
Cable 2-core 0.3 mm
2
The 10 m wire is attached in the remote controller accessory. Max. 500 m
6
Wired remote controller
7
Power supply cord
Caution:
• Use care not to make miswiring.
• Firmly tighten the terminal screws to prevent them from loosening.
• After tightening, pull the wires lightly to confirm that they do not move.
• Wiring for remote controller cable shall be apart (5 cm or more) from power
source wiring so that it is not influenced by electric noise from power source
wiring.
7.2. Indoor unit (Fig. 7-3) (Fig. 7-4) (Fig. 7-5)
Work procedure
1. Loosen the two screws securing the electric component cover, and then slide and
remove the cover.
2. Route the wires along the wiring routes and through the wire inlets in the electric
component box.
(Procure the power supply cord and indoor/outdoor unit connecting cable locally.)
3. Securely connect the power supply cord and the indoor/outdoor unit connecting
cable to the terminal block.
4. Secure the wires with the cable straps inside the electric component box.
Secure the wires with cable straps as cushioning components so that no stress is
applied to the connecting sections of the terminal block when tension is generated.
5. Install the electric component cover.
Make sure that the wires do not get pinched.
6. Secure the wires with the cable straps outside the electric component box.
Warning:
• Insert hook the electric component cover into the bent support on the electric
component box and attach the 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 cable to connect the indoor
and outdoor units and fix the cable 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 cable could result in a fire.
• Secure all of the indoor/outdoor unit connecting cables with the cable strap
on the side of the electric component box.
For Power supply
6. Drainage piping work
1. Connect the drain socket (supplied with the unit) to the drain port. (Fig. 6-2)
(Affix the tube using PVC adhesive then secure it with a band.)
2. Install a locally purchased drain pipe (PVC pipe, O.D. ø32).
(Affix the pipe using PVC adhesive then secure it with a band.)
3. Insulate the tube and pipe. (PVC pipe, O.D. ø32 and socket)
4. Check that drain flows smoothly.
5. Insulate the drain port with insulating material, then secure the material with a
band. (Both insulating material and band are supplied with the unit.)
A
Main unit
B
Insulating material
C
Band (large)
D
Drain port (transparent)
E
Insertion margin
F
Matching
G
Drain pipe (O.D. ø32 PVC TUBE)
H
Insulating material (purchased locally)
I
Transparent PVC pipe
J
O.D. ø32 PVC TUBE (Slope 1/100 or more)
K
Band (middle)
L
Drain socket
(mm)
Fig. 6-2
B
C
F
K
30 30 30
D E
E
L
G
H
I
A
A
J
C
,
K
A
C
B
D
E
S3
S3
S2
S1
S2
S1
2
1
A
Indoor unit
B
Outdoor unit
C
Wired remote controller
D
Wired main switch/fuse
E
Grounding
Fig. 7-3
Fig. 7-1
A
Electric component cover
B
Electric component box
C
Entry for Indoor-Outdoor connecting cable
D
Entry for wired remote controller cable
E
Cable clamp
D
C
F
H
G
A
B
1 2
6
5
2
4
3
7
L N
1
Fig. 7-2
Indoor terminal block
Indoor/outdoor unit
connecting wire
3-core 1.5 mm
2
or more
Outdoor terminal block
Earth wire (green/yellow)
Power supply cord
F
Indoor/Outdoor unit connecting terminal
G
Wired remote controller terminal
H
Indoor controller
I
Earth cable
J
Cable strap
BH79A235H02_en.indd 7
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