Midea MV8M-120WV2RN1 Engineering Data page 17

Table 1-5.2: Extract from medium static pressure duct (T2) cooling capacity table
Capacity
Model
index
22
28
36
45
56
T2
71
80
90
112
140
Abbreviations:
TC: Total capacity (kW); SC: Sensible capacity (kW)
Table 1-5.3: Selected indoor units
Peak heat load (kW)
Selected indoor unit
Corrected TC (kW)
Step 3: Select outdoor units
 Determine the required total heat load from the indoor units to the outdoor unit based on either the sum of the peak
loads of each room or the system peak load. In this example, it is determined based on the system peak load.
Therefore, the required heat load is 10.5kW.
 Provisionally select an outdoor unit using the sum of the capacity indexes (CIs) of the selected indoor units (as shown
in Table 1-5.4), ensuring that the combination ratio is between 45% and 130%. Refer to Table 1-5.5. As the sum of CIs
of the indoor units is 120, all outdoor units are potentially suitable except 8kW. Start from the smaller, which is the
10.5kW unit.
14°C WB 16°C WB 18°C WB
20°C DB 23°C DB 26°C DB
TC SC TC SC TC
1.5 1.4 1.8 1.5 2.1
1.9 1.7 2.3 1.9 2.6
2.5 2.1 2.9 2.3 3.4
3.1 2.6 3.7 2.8 4.2
3.9 3.0 4.6 3.3 5.3
4.9 3.9 5.8 4.3 6.7
5.5 4.4 6.6 4.9 7.5
6.2 5.3 7.3 5.8 8.4
7.7 6.4 9.1 7.1 10.5
9.7 7.8 11.3 8.6 13.2
Room A
3.1
MI2-36T2DHN1 MI2-28T2DHN1
3.6
Table 1-5.4: Sum of indoor unit capacity indexes
Model Capacity Index
MI2-28T2DHN1
MI2-22T2DHN1
Sum of CIs
V8 Mini R410A VRF 50Hz
Indoor air temperature
19°C WB 20°C WB
27°C DB 28°C DB
SC TC SC TC SC
1.6 2.2 1.6 2.3 1.7
2.1 2.8 2.1 3.0 2.1
2.5 3.6 2.6 3.8 2.7
3.1 4.5 3.2 4.8 3.2
3.6 5.6 3.7 5.9 3.8
4.7 7.1 4.9 7.5 4.8
5.3 8.0 5.5 8.4 5.5
6.3 9.0 6.4 9.6 6.5
7.7 11.2 7.8 11.9 8.1
9.6 14.0 9.8 14.8 9.8
Room B Room C
2.4 2.4
MI2-28T2DHN1
2.8 2.8
No. of units
36 1
28 3
120
22°C WB 24°C WB
30°C DB 32°C DB
TC SC TC SC
2.4 1.5 2.4 1.5
3.1 2.0 3.1 1.9
4.2 2.8 3.9 2.3
4.9 3.1 5.1 2.9
6.2 3.7 6.2 3.4
7.8 4.6 7.8 4.3
8.8 5.2 8.8 4.8
9.9 6.1 9.9 5.7
12.5 7.8 12.5 7.4
15.7 9.7 15.4 8.8
Room D
2.6
MI2-28T2DHN1
2.8
15