Midea VC Pro Series Engineering Data page 156

VC Pro VRF 50/60Hz
Table 3-4.5: Main pipe 1 (L ) and first indoor branch joint (A)
1
Total capacity of
outdoor units
Gas pipe (mm)
8HP Φ19.1
10HP Φ22.2
12-14HP Φ25.4
16HP Φ28.6
18-24HP Φ28.6
26-34HP Φ31.8
36-54HP Φ38.1
56-66HP Φ41.3
68-82HP Φ44.5
84-90HP Φ50.8
Notes:
1. The main pipe (L ) and first indoor branch joint (A) should be sized according to whichever of Tables 3-4.4 and 3-4.5 indicates the larger size.
1
Figure 3-4.4: Outdoor connection pipes
g2
Table 3-4.6: Outdoor connection pipes (g1 to g3, G
Outdoor unit
Pipes
capacity
8-12HP
g1 to g3 14-22HP
24-30HP
G
1
Table 3-4.8: Indoor auxiliary pipes (a to q)
Capacity of indoor unit
(kW)
≤ 4.5
≥ 5.6
Notes:
1. An indoor auxiliary pipe should not be larger than the indoor main pipe immediately upstream of it. For indoor auxiliary
pipes greater than 10m in length with indoor units of capacity great than or equal to 5.6kW, the gas and liquid side pipes
should each either be sized according to this table, or else be the same size as the indoor main pipe immediately upstream,
whichever is smaller.
156
Equivalent length of all liquid pipes < 90m
Liquid pipe (mm)
Φ9.53
Φ9.53
Φ12.7
Φ12.7
Φ15.9
Φ19.1
Φ19.1
Φ19.1
Φ22.2
Φ25.4
g1
Main pipe
S
Two units combination
1
Gas pipe (mm)
Φ25.4
Φ31.8
Φ38.1
Φ41.3
Pipe length ≤ 10m
Gas pipe (mm)
Φ12.7
Φ15.9
Branch joint kit Gas pipe (mm)
FQZHN-02D Φ22.2
FQZHN-02D Φ25.4
FQZHN-02D Φ28.6
FQZHN-03D Φ31.8
FQZHN-03D Φ31.8
FQZHN-03D Φ38.1
FQZHN-04D Φ41.3
FQZHN-05D Φ44.5
FQZHN-05D Φ54.0
FQZHN-05D Φ54.0
g3 g2
S
Three units combination
) Table 3-4.7: Outdoor branch joint kits (L to M)
No. of outdoor
Liquid pipe (mm)
Φ12.7
Φ15.9
Φ19.1
Φ22.2
Liquid pipe (mm)
Φ6.35
Φ9.53
Equivalent length of all liquid pipes ≥ 90m
Liquid pipe (mm)
Φ9.53
Φ9.53
Φ12.7
Φ12.7
Φ15.9
Φ19.1
Φ19.1
Φ19.1
Φ22.2
Φ25.4
g1
Main pipe
R
G1
Branch joint kit
units
2 FQZHW-02N1E
3 FQZHW-03N1E
1
Pipe length > 10m
Gas pipe (mm) Liquid pipe (mm)
Φ15.9 Φ9.53
Φ19.1 Φ12.7
Branch joint kit
FQZHN-02D
FQZHN-02D
FQZHN-03D
FQZHN-03D
FQZHN-03D
FQZHN-04D
FQZHN-04D
FQZHN-05D
FQZHN-06D
FQZHN-07D