MCAC-VTSM-2011-09
Installation
66
Piping Selection
according to the bigger one.
If the size of tubing for connecting outdoor unit is different from main pipe, a transfer connector should be
mounted.
Indoor main pipe/
indoor branch
Outdoor
（
HP
）
Pipe dimension
(suction gas/discharge gas/Liquid)
Branch
L1/A
W1+W2+W3 =28
Ф38.1/Ф31.8/Ф22.2
FQZHN-04S
1.1.2.2 Selection of indoor unit main pipe and the branching pipe
E.g. The branches (A,B,C,D,E, Indoor unit main pipe is between the 1
st
branching pipe A and the MS. The
branching pipe ( A B, C, D, E) is between the first branching pipe A and MS equipment.
And indoor main pipe
(L2~L11) in the above drawing.
Please refer to the following table.
A: The total capacity of subordinate indoor units of tubing (The indoor unit from this tubing to the end)
A (×100W)
Suction Gas pipe
High-pressure gas pipe
High-pressure liquid pipe
Branch joint
A
＜
56
Φ12.7
Φ9.5
Φ6.4
FQZHN-01S
56≤A
＜
166
Φ19.1
Φ15.9
Φ9.5
FQZHN-01S
166≤A
＜
230
Φ22.2
Φ19.1
Φ9.5
FQZHN-02S
230≤A
＜
330
Φ22.2
Φ19.1
Φ12.7
FQZHN-02S
330≤A
＜
460
Φ28.6
Φ22.2
Φ12.7
FQZHN-03S
460≤A
＜
660
Φ28.6
Φ22.2
Φ15.9
FQZHN-03S
660≤A
＜
920
Φ34.9
Φ28.6
Φ19.1
FQZHN-04S
920≤A
＜
1100
Φ41.3
Φ31.8
Φ19.1
FQZHN-04S
1.1.2.3 Selection of the indoor auxiliary pipe and auxiliary branch
E.g. The pipe (a ~ n) in the above drawing. Branch I,II,III,IV
Please refer to the following table.
The total capacity of
Indoor units(×100W)
When indoor unit
pipe length≤10m When indoor unit pipe length>10m
Branch
Gas side
Liquid side
Gas side
Liquid side
A≤45
Φ12.7mm
Φ6.4mm
Φ15.9mm
Φ9.5mm
FQZHN-01S
A≥56
Φ15.9mm
Φ9.5mm
Φ19.1mm
Φ12.7mm
FQZHN-01S
1.1.2.4 Selection of MS:
A (×100W)
MS Box Model
A
＜
56
GIA
-MS02/N1-A
A≥56
GIA
-MS04/N1-A
1.1.2.5 Selection of the Outdoor branch (L, M) and the outdoor unit pipe (g1, g2, g3, G1)
E.g. The branch (L, M) and outdoor unit pipe (g1, g2, g3, G1) in the above drawing.
When there is only single outdoor unit (
The Max. equivalent length of tubing ≥90m), please refer to the
following table:
Model
The outdoor unit pipe dia. (mm)
Suction Gas pipe
High-pressure gas pipe
High-pressure liquid pipe
GIA
-2528WD1RN1TB
Φ25.4
Φ19.1
Φ12.7
GIA
-28010WD1RN1TB
Φ25.4
Φ19.1
Φ12.7
When multi outdoor units are paralleled, please refer to the following table:
Outdoor unit
quantity
Drawing example
Outdoor unit pipe dia.(mm)
Outdoor branch
