Midea V6R Series Manual page 92

 Indoor units N9 to N10 are of capacity 16kW. Refer to Table 3-4.8. Indoor auxiliary pipes g and l are Φ15.9 / Φ9.53.
 HT Hydro modules N12 to N13 are of capacity 14kW. Refer to Table 3-4.8. Indoor auxiliary pipes n and o are Φ15.9 /
Φ9.53.
Step 2: Select indoor branch joints between MS box and indoor units
 Refer to Table 3-4.8. Branch joint I are FQZHN-01D.
Step 3: Select indoor main pipes and MS box and indoor branch joints B to E
 The indoor units (N1 to N3) downstream of MS box MS1 have total capacity of 14 x 3 = 42kW. Refer to Table 3-4.4.
Indoor main pipe L3 is Φ12.7 / Φ28.6 / Φ19.1. Refer to Table 3-4.12. MS box MS1 is MS04/N1-D.
 The indoor units (N4 to N8) downstream of MS box MS2 have total capacity of 14 x 2 +4.5 x 3= 41.5kW. Refer to Table
3-4.4. Indoor main pipe L7 is Φ12.7 / Φ28.6 / Φ19.1. Refer to Table 3-4.12. MS box MS1 is MS04/N1-D.
 The indoor units (N9 to N10) downstream of MS box MS3 have total capacity of 16 x 2 = 32kW. Refer to Table 3-4.4.
Indoor main pipe L3 is Φ12.7 / ΦΦ28.6 / Φ19.1. Refer to Table 3-4.12. MS box MS3 is MS01/N1-D.
 The indoor units (N11) downstream of MS box MS4 have total capacity 14kW. Refer to Table 3-4.4. Indoor main pipe
L8 is Φ9.53 / Φ15.9 / Φ12.7. Refer to Table 3-4.12. MS box MS3 is MS01/N1-D.
Step 4: Select main pipe and indoor branch joint A
 The total capacity of the outdoor units is 16 + 14 + 12 = 42HP. The system's equivalent total piping length is not in excess
of 90m. Refer to Tables 3-4.4. Main pipe L1 is Φ41.3 / Φ34.9 / Φ19.1. Indoor branch joint A is FQZHN-05SB1.
Step 5: Select outdoor connection pipes and outdoor branch joints
 The master unit is 16HP and the slave units are 14HP and 12HP. Refer to Table 3-4.6. Outdoor connection pipes g1 and
g2 are Φ28.6 / Φ22.2 /Φ12.7 and outdoor connection pipe g3 is Φ28.6 / Φ19.1 /Φ12.7
 Refer to Table 3-4.6. Outdoor connection pipe G1 is Φ41.3 /Φ34.9 / Φ19.1.
 There are three outdoor units in the system. Refer to Table 3-4.7. Outdoor branch joints L and M are FQZHW-03SB1.
4.7 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 3-4.14
and 3-4.15.
 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 3-4.13.
Figure 3-4.13: Branch joint spacing and separation from bends (unit: mm)
500 or more
500 or more
500 or more
Indoor
unit
V6R VRF 50/60Hz
500 or more
500 or more
Indoor Indoor
unit unit
147