GMV DC Inverter VRF 
30 
The length of a straight pipe between two manifolds cannot be less than 500 mm. The 
length of a straight pipe before the main pipe port of the manifold cannot be less than 500 mm. 
The length of a straight pipe between the branch of the manifold and the IDU cannot be less 
than 500 mm. See Fig.4.3.5. 
 
 
 
Fig. 4.3.5 
(3)  There  must  be  three  fixing  point  for  both  horizontal  and  vertical installation of  the 
Y-type manifold. See Fig. 4.3.6. 
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 
Fixing point 3: 250 mm on the branched pipe from the welding point 
 
Fig. 4.3.6