Daikin VRV IV S Series Engineering Data page 506

REFNET Pipe System
3.2 REFNET Joints and Headers
3.2.1 REFNET Joints
For gas and liquid branch pipes
 Make sure that all branch pipes are fitted such that they branch either horizontally or vertically.
 When the size of the selected field piping is different from that of branch pipe then the connecting section should
be cut with a pipe cutter as shown in the figure below.
 When you are cutting an inlet or outlet pipe with a pipe cutter make sure that you make the cut in the center of the
connection area.
 Branch pipes must be insulated in accordance with the handbook which comes with each kit.
3.2.2 REFNET Headers
504
EDMT331529A
Installation of Outdoor Units