Daikin VRV II Series Design, Installation & Testing Instructions page 134

Appendix
REFNET Joint and 1.
Header Installation (Gas line and liquid line branch pipe)
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2.
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Note:
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128
REFNET joint
If the selected building pipe differs form the branch pipe in size, cut the connection with a pipe cutter as
shown below.
Install the branch pipe either vertically or horizontally.
Insulate the branch pipe as described in the kit installation manual.
REFNET header
If the selected field pipe differs from the branch pipe in size, cut the connection with a pipe cutter as
shown below.
Fit a stop end on all open branch pipe connections not in use.
Install the branch pipe horizontally.
Insulate the branch pipe as described in the kit installation manual.
Install the REFNET joint horizontally or vertically, keeping it within a 30 angle when installed
horizontally.
Install the REFNET header so that it branches horizontally.
Do not used a T-joint for the branch pipe.
Si39-303
General Information