Installation Of Refrigerant Pipe - Midea MIV V4+ Mini Service Manual

MIV V4+ Mini DC Inverter R410A (220V, 8 kW)

4. Installation of Refrigerant Pipe

CAUTION
To prevent the refrigerant piping from oxidizing inside when welding, it is necessary to charge nitrogen, or oxide will chock the
circulation system.
4.1 Length and Drop Height Permitted of the Refrigerant piping
Pipe Length
Maximum Piping(L)
Pipe length (from the first line branch to farthest indoor unit)
Indoor Unit outdoor unit
Drop Height
Drop Height
Indoor Unit to Indoor Unit Drop Height
Note: Conversion of the equivalent length: Convert into the direct pipe length according to branch Junction 0.5m/l
52
Total Pipe Length (Actual)
Actual Length
Equivalent Length
Outdoor Unit Up
Outdoor Unit Down
Permitted value
L1+L2+L3+L4+L5+L6
≤100m
+A+B+C+D+E
≤45m L1+L2+L3+L4+L5+L6+E
≤50m L3+L4+L5+L6+E
≤20m
20m
20m
8m
DM12-01.01.05en
Piping
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Installation