Midea MV8M-120WV2RN1 Engineering Data page 54

V8 Mini R410A VRF 50Hz
8.3 Capacity Correction Factors for Piping Length and Level Difference
Figure 2-8.1: 120 model rate of change in cooling capacity
50
40
30
20
10
0
10 20 30 40 50
0
10
20
30
40
Figure 2-8.3: 140 model rate of change in cooling capacity
50
40
30
20
10
0
10 20 30 40
0
10
20
30
40
Figure 2-8.5: 160 model rate of change in cooling capacity
50
40
30
20
10
0
10 20 30 40 50
0
10
20
30
40
Notes:
1. 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.
2. These figures illustrate the rate of change in capacity of a system with only standard indoor units at maximum load (with the thermostat set to maximum)
under standard conditions. Under partial load conditions there is only a minor deviation from the rate of change in capacity shown in these figures.
3. The capacity of the system is either the total capacity of the indoor units obtained from indoor unit capacity tables or the corrected capacity of the outdoor
units as per the calculations below, whichever is smaller.
Corrected capacity of
outdoor units
52
60 70 80 90 100 110 120
50 60 70 80 90 100 110 120
60 70 80 90 100 110 120
Capacity of outdoor units obtained from outdoor unit
=
capacity tables at the combination ratio
Figure 2-8.2: 120 model rate of change in heating capacity
Figure 2-8.4: 140 model rate of change in heating capacity
Figure 2-8.6: 160 model rate of change in heating capacity
50
40
30
20
10
0
10 20 30 40 50
0
10
20
30
40
60 70 80
90 100 110 120
Capacity
x
correction factor