Midea V6-i Series Manual page 18

c) Find the correction factor for piping length and level difference ("K1")
Figure 1-5.3: V6-i rate of change in cooling capacity
H(m)
50
40
30
20
10
0
0
-10
-20
-30
-40
Notes:
1.
d) Calculate the corrected capacity of MVi-260WV2RN1(A) ("C") by using K1:
 The corrected capacity 24.77 kW is lower than required total heat load 26.5kW, so selection is not complete. Step 3
should be repeated from the point where the outdoor unit capacity is provisionally selected.
Repeat Step 3: Select outdoor unit
 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 26.5kW.
 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 50% and 130%. Refer to Table 1-5.5. As the sum of CIs
of the indoor units is 314, outdoor units 9-16HP are potentially suitable. For the 9HP unit is not suitable, try to select
10HP unit.
10 20 30 40 50 60 70 80 90 100 110 120
The horizontal axis shows equivalent length of piping between farthest indoor unit and first
outdoor branch joint; the vertical axis shows the largest level difference between indoor unit
and outdoor unit. For level differences, positive values indicate that the outdoor unit is above
the indoor unit, negative values indicate that the outdoor unit is below the indoor unit.
C = B × K1 = 27.59 × 0.898 =24.77kW
Table 1-5.8: Sum of indoor unit capacity indexes
Model
MI2-112T2DHN1
MI2-56T2DHN1
MI2-45T2DHN1
Sum of CIs
Capacity Index No. of units
112 1
56 2
45 2
314
V6-i VRF 50Hz
L(m)
17