Selecting And Preparing The Electrical Wiring - Sinclair SDV6 User And Installation Manual

4.4 Selecting and Preparing
the Electrical Wiring
4.4.1 Safety device requirements
1. Select the wire diameters
individually for each unit based on Table 4.13 and
Table 4.14, where the rated current in Table 4.13
refers to MCA in Table 4.14. If the MCA exceeds 63A,
the wire diameters should be selected according to
the national wiring regulation.
2. The maximum allowable voltage range variation
between phases is 2%.
3. Select circuit breakers that have a contact separation
in all poles not less than 3 mm providing full
disconnection, where MFA is used to select the
current circuit breakers and residual current operation
breakers:
Outdoor Unit
System
Voltage Frequency
(V) (Hz)
8HP 380-415 50
10HP 380-415 50
12HP 380-415 50
14HP 380-415 50
16HP 380-415 50
18HP 380-415 50
20HP 380-415 50
22HP 380-415 50
24HP 380-415 50
26HP 380-415 50
28HP 380-415 50
30HP 380-415 50
32HP 380-415 50
Phase and frequency of power supply system: 3N-50Hz, Voltage: 380-415V
Abbreviations:
MCA: Minimum Circuit Amps; TOCA: Total Over-current Amps; MFA: Maximum Fuse Amps; MSC: Maximum Starting
Current (A); RLA: Rated Load Amps; FLA: Fan Load Amps.
Units are suitable for use in electrical systems where voltage supplied to unit terminals is not below or above listed range
limits. The maximum allowable voltage variation between phases is 2%.
Select wire size based on the value of MCA.
TOCA indicates the total overcurrent amps value of each OC set.
MFA is used to select overcurrent circuit breakers and residual-current circuit breakers.
MSC indicates the maximum current on compressor start-up in amps.
RLA is based on the following conditions: indoor temperature 27°C DB, 19°C WB; outdoor temperature 35°C DB.
(minimum value)
Power Current
Min. Max. MCA TOCA
(V) (V) (A)
342 440
20.7
17.0
342 440
22.5
18.8
342 440
26.8
23.0
342 440
31.0
26.2
342 440
36.2
31.4
342 440
38.0
33.0
342 440
39.5
40.5
342 440
47.1
41.5
342 440
52.0
46.0
342 440
54.0
51.0
342 440
57.4
51.0
342 440
63.2
56.8
342 440
63.4
57.0
INFORMATION
i
27
Nominal cross-sectional area (mm
Rated current
of appliance
Flexible cords
(A)
≤ 3
0.5 and 0.75
> 3 and ≤ 6
0.75 and 1
> 6 and ≤ 10
1 and 1.5
> 10 and ≤ 16
1.5 and 2.5
> 16 and ≤ 25
2.5 and 4
> 25 and ≤ 32
4 and 6
> 32 and ≤ 50
6 and 10
> 50 and ≤ 63
10 and 16
Compressor
MFA MSC RLA
(A) (A) (A) (A)
-
12.7
20
-
13.0
25
-
17.0
32
-
26.8
32
-
31.2
40
-
40 17.9+17.0
-
50 18.5+17.7
-
50 20.0+19.2
-
63 22.7+22.2
-
63 20.3+20.2
-
63 21.7+22.0
-
80
24.5+24.8
-
80
25.5+25.8
Table 4.13
)
2
Cable for fixed
wiring
1 to 2.5
1 to 2.5
1 to 2.5
1.5 to 4
2.5 to 6
4 to 10
6 to 16
10 to 25
Table 4.14
Fan Motor
Power FLA
(kW) (A)
0.56 1.7
0.56 1.7
0.56 1.8
0.92 2.8
0.92 3.0
0.56+0.56 1.8+1.8
0.56+0.56 1.8+1.8
0.56+0.56 2.0+2.0
0.56+0.56 2.0+2.0
0.92+0.92 2.1+2.1
0.92+0.92 2.1+2.1
0.92+0.92 2.2+2.2
0.92+0.92 2.2+2.2