Gree NCHS1D Owner's Manual page 23

GMV6 HR Mode Exchange Box
1) Aim the flared outlet of copper pipe at the center of screwed center, and then rotate the
flared nut with hand.
2) Use moment wrench to rotate the flared nut until you has head a sound of "KATA".
3) Wrap the connection pipe (not insulated) and joint with sponge and then use plastic
adhesive tape to bundle it.
4) Support the connection pipe with bracket.
5) The degree of curvature of piping can't be too small, otherwise, the pipe may be broken.
Installer should use pipe bender to bend the pipe.
6) When connecting Mode Exchange Box and connection pipe, do not pull the big joint and
small joint of Mode Exchange Box forcibly. Otherwise, capillary or other pipes of Mode
Exchange Box may be broken, which will lead to leakage.
4.2.4 Selection of Y-type Branch
If connect outdoor unit to multiple Mode Exchange Box, the Y-type branch should be adopted.
(1) Y-type branch
(2) Y-type branch has several pipe sections with different size, which facilitates to match with
various copper pipes. Use pipe cutter to cut in the middle of the pipe section that is of proper
size and remove burrs as well. See the following figure.
(3) Y-type branch must be installed vertically or horizontally.
(4) Branch shall be insulated by insulating material that can bear 120° or even higher
temperature. The attached foam of branch cannot be taken as insulating material.
4.2.5 Thermal Insulation for Pipeline
(1) For multi VRF system, every copper pipe should be labeled so as to avoid misconnection.
Fig.4.2.8
Fig.4.2.9
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