V8 Mini R410A VRF 50Hz
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Midea V8 Mini Series Engineering Data Book
Table 3-3.2: Summary of permitted refrigerant piping lengths and level differences
Permitted value of liquid pipe
Total Pipe Length(Actual)
L1+L2+L3+L4+L5+a+b+c+d+e+f
Piping length between
the outdoor unit and
the farthest indoor unit
L1+L2+ max(a,b) or
L1+L3+L4+max(c,d) or
L1+L3+L5+max(e,f)
Pipe Length (from the first branch to
the furthest IDU)
L2+max(a,b,c,d) or L3+max(e,f,g,h,i)
Level difference
between outdoor unit
and indoor units
1
Level difference between indoor units
Requirement 1: It is recommended that an oil return bend with dimensions as specified in Figure 3-3.2 is set every 10
m in the gas pipe of the main pipe.
Figure 3-3.2: Oil return bend
Table 3-3.3: Connectable indoor units
Maximum number of
connected indoor units
Connectable indoor unit capacity range
50%~160%
1
Connectable indoor unit capacity range
50%~130%
1
Notes:
1. If all indoor units in system are V8 Series the total combination ratio must not exceed 160%. If there are non V8 series indoor unit in system the total combination
ratio must not exceed 130%.