V8 Mini R410A VRF 50Hz
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Part 3 - System Design and Installation
4.6 Branch Joints
Use U-shaped branch joints as specified on the
construction drawings – do not replace U-shaped branch
joints with tee joints.
Indoor branch joints may be installed either horizontally or
vertically. Horizontal branch joints must be installed at an
angle to the horizontal not exceeding 10° in order to avoid
uneven distribution of refrigerant and possible
malfunction. Refer to Figure 3-4.8.
Figure 3-4.8: Branch joint orientation
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 below.
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