VC Pro VRF 50/60Hz
158
Midea VC Pro Series Engineering Data Book
4.6 Branch Joints
Branch joint design should take account of the following:
U-shaped branch joints should be used – tee joints are not suitable. Branch joint dimensions are given in Tables 3-4.9
and 3-4.10.
To avoid accumulation of oil in the outdoor units, outdoor branch joints should be installed horizontally and must not
be higher than the outdoor unit refrigerant outlets. Refer to Figure 3-5.9 in Part 3, 5.6 “Branch Joints”. Indoor branch
joints may be installed either horizontally or vertically.
To ensure even distribution of refrigerant, branch joints should not be installed within 500mm of a 90° bend, another
branch joint or the straight section of piping leading to an indoor unit, with the minimum 500mm being measured from
the point where the branch joint is connected to the piping, as shown in Figure 3-4.5.
Figure 3-4.5: Branch joint spacing and separation from bends (unit: mm)
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