Combination Ratio - Midea V8 Series Service Manual

V8/V8i PRO VRF 50Hz

5 Combination Ratio

Combination ratio =
Table 1-5.1: Indoor and outdoor unit combination ratio limitations
Minimum
Type
combination ratio
V8 Series outdoor
units
V8i Series
outdoor units
Notes:
1. All the indoor units connected should be indoor units with ø5mm size copper tube heater exchanger. This limitation is to avoid too big indoor unit
exchanger cause reliability and performance problem.
2. Piping between farthest indoor unit and first indoor branch joint should less than 40m.
3. Combination ratio greater than 130% is available as a customization option.
4. When fresh air processing units are installed together with standard indoor units, the total capacity of the fresh air processing units must not exceed 30%
of the total capacity of the outdoor units and the total combination ratio must not exceed 100%.
Table 1-5.2: Combinations of indoor and outdoor units (V8i)
Outdoor unit capacity
Capacity
kW HP
index
25.2 8 252
28.0 10 280
33.5 12 335
40.0 14 400
45.0 16 450
50.0 18 500
56.0 20 560
61.5 22 615
67.0 24 670
73.0 26 730
78.5 28 785
85.0 30 850
90.0 32 900
14
Sum of capacity indexes of the indoor units
Capacity index of the outdoor units
Standard indoor units only
200% 1,2,3 (Single ODU)
50%
130% (Combined ODU)
50% 130% or 200%
Sum of capacity indexes of
connected indoor units (standard
indoor units only)
126 to 327.6
140 to 364
167.5 to 435.5
200 to 520
225 to 585
250 to 650
280 to 728
307.5 to 799.5
335 to 871
365 to 949
392.5 to 1020.5
425 to 1105
450 to 1170
Maximum combination ratio
Fresh air processing
units only
100%
1,2,3
100%
Sum of capacity indexes of connected indoor
units (fresh air processing units and standard
indoor units together)
126 to 252
140 to 280
167.5 to 335
200 to 400
225 to 450
250 to 500
280 to 560
307.5 to 615
335 to 670
365 to 730
392.5 to 785
425 to 850
450 to 900
Fresh air processing units and
standard indoor units together
100% 4
4
100%
Maximum number of
connected indoor
units
13
16
19
23
26
29
33
36
39
43
46
50
53