YMGI
•
Your Modern Green Idea
35
3. Y-type manifold must be installed vertically or horizontally.
Fig. 32
Y-type manifold
Total capacity of downstream indoor
unit(s) C (KBtu/h)
Model
C
＜
68
VRFO-YtubeP-1AA
68≤C≤102
VRFO-YtubeP-1BA
102
＜
C≤239
VRFO-YtubeP-02A
239
＜
C
VRFO-YtubeP-03A
4.
Manifold is isolated by insulating material that can bear 120ºC (248
℉
) or higher temperatures. Manifold
attached foam cannot be taken as insulating material.
Installation and thermal insulation for pipeline
1. For multi VRF system, every copper pipe should be labeled so as to avoid misconnection.
2. Manifolds can be laid in the following ways:
The length of a straight pipe between two manifolds cannot be less than 500 mm (19-11/16in.). The length of a
straight pipe before the main pipe port of the manifold cannot be less than 500mm (19-11/16in.). The length of a
straight pipe between the branch of the manifold and the IDU cannot be less than 500mm (19-11/16in.). See
Fig.33.
Fig. 33
3. There must be three fixing point for both horizontal and vertical installation of the Y-type manifold. See Fig.34.
Fixing point 1: 100 mm on the main inlet manifold from the welding point
Fixing point 2: 200 mm on the main branched pipe from the welding point
