25
4.2.5.6 Fitting pipe between manifolds
Pipe size (between two manifolds at indoor unit side) is based on the total capacity of
upstream indoor unit(s).
Fig.31
Total capacity of downstream
indoor unit(s)
-
kW
(Btu/h)
Dimension of the pipe of indoor branch
Gas Pipe mm(in.)
Liquid Pipe mm(in.)
C
≤
5.0
(17000)
Φ12.7(1/2)
Φ6.35(1/4)
5.0
(17000)
＜
C
≤
14.2
(48000)
Φ15.9(5/8)
Φ9.52(3/8)
14.2
(48000)
＜
C
≤
22.4
(76000)
Φ19.05(3/4)
Φ9.52(3/8)
22.4
(76000)
＜
C
≤
28.0
(96000)
Φ22.2(7/8)
Φ9.52(3/8)
28.0
(96000)
＜
C
≤
40.0
(136000)
Φ25.4(1)
Φ12.7(1/2)
40.0
(136000)
＜
C
≤
45.0
(150000)
Φ28.6(1-1/8)
Φ12.7(1/2)
45.0
(150000)
＜
C
≤
68.0
(232000)
Φ28.6(1-1/8)
Φ15.9(5/8)
68.0
(232000)
＜
C
≤
96.0
(327000)
Φ31.8(1-1/4)
Φ19.05(3/4)
96.0
(327000)
＜
C
≤
135.0
(460000)
Φ38.1(1-1/2)
Φ19.05(3/4)
135.0
(460000)
＜
C
≤
186.0
(630000)
Φ41.3(1-5/8)
Φ19.05(3/4)
186.0
(630000)
＜
C
Φ44.5(1-3/4)
Φ22.2(7/8)
4.2.5.7 Fitting pipe between indoor unit and manifold
Manifold should be matched with fitting pipe of indoor unit.
Fig.32
Lennox
VRF Unit
