Midea M-thermal Split MHA-V10W/D2N8 - Safety Device Requirement; Wire Diameter Selection; Circuit Breaker Selection

16
Stated values are maximum values (see electrical data for exact values).
4/6
Unit(kW)
Maximum overcurrent
protector(MOP)
18 A
Wiring size
4 mm
2
8.4 Remove the switch box cover
Voltage
(V)
Hz Min.
(V)
Max.
(V)
MCA
(A)
TOCA
(A)
MFA
(A)
MSC
(A)
RLA
(A)
KW FLA
(A)
Outdoor Unit Power Current Compressor OFM
1
1
1
1
14 18
-
11.3
0.094
0.9
254 30220-240 198
-
16.7
0.195
1.719
19254 30220-240 198
-
19 19
16.7
0.195
1.7
254198 30220-240
14 30
-
0.094
0.9220-240
50
50
50
50
198 254 18
11.3
System
6kW
4kW
8kW
10kW
1. Select the wire diameters( minimum value) individually for each unit based on the table 8-1 and table 8-2，
where the rated current in table 9-1 means MCA in table 9-2. In case the MCA exceeds 63A, the wire diameters
should be selected according to the national wiring regulation.
2. Select circuit breaker that having 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:
8.3 Safety device requirment
Table 8-2
Rated current
of appliance:（A）
Nominal cross-sectional area (mm )
2
Flexible cords Cable for fixed wiring
Table 8-1
≤3 0.5 and 0.75 1 and 2.5
>3 and ≤6 0.75 and 1 1 and 2.5
>6 and ≤10 1 and 1.5 1 and 2.5
>10 and ≤16 1.5 and 2.5 1.5 and 4
>16 and ≤25 2.5 and 4 2.5 and 6
>25 and ≤32 4 and 6 4 and 10
>32 and ≤50 6 and 10 6 and 16
>50 and ≤63 10 and 16 10 and 25
8/10
19 A
4 mm
2
NOTE
MCA : Max. Circuit Amps. (A)
TOCA : Total Over-current Amps. (A)
MFA : Max. Fuse Amps. (A)
MSC : Max. Fuse Amps. (A)
FLA : In nominal cooling or heating test condition，the input Amps of compressor where MAX. Hz
can operate Rated Load Amps. (A);
KW : Rated Motor Output
FLA : Full Load Amps. (A)