S1
S2
S3
S1
S2
S3
9
7.2. Field electrical wiring
Outdoor unit model
SHW80V
SHW112V
SHW112, 140Y
SHW230Y
Outdoor unit power supply
~/N (single), 50 Hz, 230 V
~/N (single), 50 Hz, 230 V
3N~ (3 ph 4-wires),
50 Hz, 400 V
3N~ (3 ph 4-wires),
50 Hz, 400 V
Outdoor unit input capacity Main switch (Breaker)
*1
32 A
40 A
16 A
25 A
Wiring
Wire No. ×
size (mm
2
)
Outdoor unit power supply
3 × Min. 4
3 × Min. 6
5 × Min. 1.5
5 × Min. 4
Indoor unit-Outdoor unit
*2
3 × 1.5 (Polar)
3 × 1.5 (Polar)
3 × 1.5 (Polar)
Cable length 50m:3×4 (Polar)/
Cable length 80m:3×6 (Polar)
Indoor unit-Outdoor unit earth
*2
1 × Min. 1.5
1 × Min. 1.5
1 × Min. 1.5
1 × Min. 2.5
Remote controller-Indoor unit
*3
2 × 0.3 (Non-polar)
2 × 0.3 (Non-polar)
2 × 0.3 (Non-polar)
2 × 0.3 (Non-polar)
Circuit rating
Outdoor unit L-N (single)
Outdoor unit L1-N, L2-N, L3-N (3 phase)
*4
230 VAC
230 VAC
230 VAC
230 VAC
Indoor unit-Outdoor unit S1-S2
*4
230 VAC
230 VAC
230 VAC
230 VAC
Indoor unit-Outdoor unit S2-S3
*4
24 VDC
24 VDC
24 VDC
24 VDC
Remote controller-Indoor unit
*4
12 VDC
12 VDC
12 VDC
12 VDC
*1. A breaker with at least 3.0 mm contact separation in each poles shall be provided. Use earth leakage breaker (NV).
Make sure that the current leakage breaker is one compatible with higher harmonics.
Always use a current leakage breaker that is compatible with higher harmonics as this unit is equipped with an inverter.
The use of an inadequate breaker can cause the incorrect operation of inverter.
*2. (SHW80 - 140)
Max. 45 m
If 2.5 mm
2
used, Max. 50 m
If 2.5 mm
2
used and S3 separated, Max. 80 m
(SHW230)
Max. 80 m Total Max. including all indoor/indoor connection is 80 m.
• Use one cable for S1 and S2 and another for S3 as shown in the picture.
*3. The 10 m wire is attached in the remote controller accessory.
*4. The figures are NOT always against the ground.
S3 terminal has 24 VDC against S2 terminal. However between S3 and S1, these terminals are NOT electrically insulated 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/Outdoor unit connecting cords shall not be lighter than polychloroprene sheathed flexible cord. (Design 60245 IEC 57)
3. Use an earth wire which is longer than the other cords so that it will not become disconnected when tension is applied.
A-Control
Outdoor Unit
3 poles isolator
Power supply
Isolator
A-Control
Indoor Unit
Warning:
· In case of A-control wiring, there is high voltage potential on the S3 terminal caused by electrical circuit design that has no electrical insulation between
power line and communication signal line. Therefore, please turn off the main power supply when servicing. And do not touch the S1, S2, S3 terminals when
the power is energized. If isolator should be used between indoor unit and outdoor unit, please use 3-pole type.
· In below - 20°C condition, it needs at least 12hr stand by to operate in order to warm the electrical parts.
7. Electrical work
Never splice the power cable or the indoor-outdoor connection cable, otherwise it may result in a smoke, a fire or communication failure.
Cross section of cable
Wire size (mm
2
)
Number of wires
Polarity
L (m)*6
Round
2.5
3
Clockwise : S1-S2-S3
* Pay attention to stripe of yellow and green
(30)
*2
Flat
2.5
3
Not applicable
(Because center wire has no cover finish)
Not applicable
*5
Flat
1.5
4
From left to right : S1-Open-S2-S3
(18)
*3
Round
2.5
4
Clockwise : S1-S2-S3-Open
* Connect S1 and S3 to the opposite angle
(30)
*4
INDOOR-OUTDOOR CONNECTING CABLE (SHW230)
S1
S3
S2
Be sure to connect the indoor-outdoor connecting cables directly to the units (no intermediate connections).
Intermediate connections can lead to communication error if water enters the cables and causes insufficient insulation to ground or a poor electrical contact at the inter-
mediate connection point.
(3C Flat cable × 2)
*1 : Power supply cords of appliances shall not be lighter than design 60245 IEC or
227 IEC.
*2 : In case that cable with stripe of yellow and green is available.
*3 : In case of regular polarity connection (S1-S2-S3), wire size is 1.5 mm
2
.
*4 : In case of regular polarity connection (S1-S2-S3).
*5 : In the flat cables are connected as this picture, they can be used up to 30 m.
*6 : Mentioned cable length is just a reference value.
It may be different depending on the condition of installation, humidity or materi
-
als, etc.
