Midea VC Pro Series Engineering Data page 16

Table 1-6.2: 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); SHC: Sensible heat capacity (kW)
Table 1-6.3: Selected indoor units
Peak heat load (kW)
Selected indoor unit
Corrected TC (kW)
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 units 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 50.7kW.
 Provisionally select outdoor units using the sum of the capacity indexes (CIs) of the selected indoor units (as shown in
Table 1-6.4), ensuring that the combination ratio is between 50% and 130%. Refer to Table 1-6.5. As the sum of CIs of
the indoor units is 706, outdoor units from 20HP to 50HP are potentially suitable. Start from the smallest, which is the
20HP unit.
14°C WB 16°C WB 18°C WB
20°C DB 23°C DB 26°C DB
TC SHC TC SHC 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
10.6
MI2-140T2DHN1 MI2-140T2DHN1
13.2
Room E
9.1
MI2-112T2DHN1 MI2-112T2DHN1
10.5
Table 1-6.4: Sum of indoor unit capacity indexes
Model
MI2-140T2DHN1
MI2-112T2DHN1
MI2-56T2DHN1
MI2-45T2DHN1
Sum of CIs
Indoor air temperature
19°C WB 20°C WB
27°C DB 28°C DB
SHC TC SHC TC SHC
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
10.7 5.1
MI2-56T2DHN1
13.2 5.3
Room F Room G
9.0 4.2
MI2-45T2DHN1
10.5 4.2
Capacity Index No. of units
140 2
112 2
56 2
45 2
706
VC Pro VRF 50/60Hz
22°C WB 24°C WB
30°C DB 32°C DB
TC SHC TC SHC
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
5.1
MI2-56T2DHN1
5.3
Room H
4.2
MI2-45T2DHN1
4.2
15