Midea V5 X VRF Series - Page 97

MCAC-VTSM-2015-10 R410A All DC Inverter V5 X Series 50Hz
Installation 95
1. Select indoor unit pipes from indoor unit to the nearest branch joint: a, b, c, d, e, f, g, h, i, j, k, l, m.
 Refer to table 5, the pipes of a, b, c, d, e, g, h, i, k, l, m are Φ15.9/ Φ9.53; the pipes of f and j are Φ12.7/
Φ6.35.
2. Select the main pipe L1, indoor unit main pipes L2~L12 and branch joints A~L:
 The downstream indoor units of L4 are N2 and N3, with total capacity of 140+71=211. Refer to table 1, the
indoor unit main pipe L4 is Φ19.1/Φ9.53. The branch pipe assembly D is FQZHN-01D.
 The downstream indoor unit of L3 is N1, N2 and N3, with total capacity of 140×2+71=351. Refer to table 1,
the indoor unit main pipe L3 is Φ28.6/Φ12.7. The branch pipe assembly C is FQZHN-03D.
 The downstream indoor unit of L6 is N5 and N6, with total capacity of 140+28=168. Refer to table 1, the
indoor unit main pipe L6 is Φ19.1/Φ9.53. The branch pipe assembly F is FQZHN-01D.
 The downstream indoor units of L5 are N4, N5 and N6, with total capacity of 140×2+28=308. Refer to table 1,
the indoor unit main pipe L5 is Φ22.2/Φ9.53. The branch pipe assembly E is FQZHN-02D.
 The downstream indoor units of L2 are N1, N2, N3, N4, N5 and N6, with total capacity of 140×4+71+28=659.
Refer to table 1, the indoor unit main pipe L2 is Φ28.6/Φ15.9. The branch pipe assembly B is FQZHN-03D.
 The downstream indoor unit of L10 is N9 and N10, with total capacity of 71+28=99. Refer to table 1, the
indoor unit main pipe L10 is Φ15.9/Φ9.53. The branch pipe assembly J is FQZHN-01D.
 The downstream indoor units of L9 are N8, N9 and N10, with total capacity of 140+71+28=239. Refer to
table 1, the indoor unit main pipe L9 is Φ22.2/ Φ9.53. The branch pipe assembly I is FQZHN-02D.
 The downstream indoor units of L8 are N7, N8, N9 and N10, with total capacity of 140×2+71+28=379. Refer
to table 1, the indoor unit main pipe L8 is Φ28.6/Φ12.7. The branch pipe assembly H is FQZHN-03D.
 The downstream indoor units of L12 are N12 and N13, with total capacity of 56×2=112. Refer to table 1, the
indoor unit main pipe L12 is Φ15.9/Φ9.53. The branch pipe assembly L is FQZHN-01D.
 The downstream indoor units of L11 are N11, N12 and N13, with total capacity of 140+56×2＝252. Refer to
table 1, the indoor unit main pipe L11 is Φ22.2/Φ9.53. The branch pipe assembly K is FQZHN-02D.
 The downstream indoor units of L7 are N7, N8, N9, N10, N11, N12 and N13, with total capacity of
140×3+71+56×2+28＝631. Refer to table 1, the indoor unit main pipe L7 is Φ28.6/Φ15.9. The branch pipe
assembly G is FQZHN-03D.
3. Select main pipe L1 and branch joint A:
 For outdoor units with capacity of 42HP, the equivalent length of all pipes in this system is larger than 90m,
refer to table 2, the main pipe L1 is Φ38.1/ Φ22.2, the branch pipe assembly A is FQZHN-04D.
 The downstream indoor units of L1 are N1~N13, with total capacity of 140×7+71×2+56×2+28×2＝1290.
Refer to table 1, the indoor unit main pipe L1 is Φ38.1/Φ19.1. So we finally select the larger pipe Φ38.1/
Φ22.2 as main pipe L1.
4. Outdoor unit connection pipe (g1, g2, g3, G1,L+M) selection (refer to table3, table 4)
 The pipe g1 is connected to 12HP outdoor unit. Refer to table3, the diameter of g1 is Φ25.4 /Φ12.7.
 The pipe g2 is connected to 12HP outdoor unit. Refer to table3, the diameter of g2 is Φ25.4 /Φ12.7.
 The pipe g3 is connected to 18HP outdoor unit. Refer to table3, the diameter of g3 is Φ31.8/ Φ15.9.
 Refer to table3, the diameter of G1 is Φ38.1/ Φ19.1.
 The quantity of combined outdoor units is three. Refer to table4, the outdoor branch assembly is L+M:
FQZHW-03N1D.