GMV5 HR Heat Recovery Cooling and Heating Mode Exchanger
14
schematics below):
Branch pipe
Branch pipe
Branch pipe
Plan view
Plan view
Top view
Right connection
Wrong connection
ME UNIT
ME UNIT
ME UNIT
Fig 4.1.13
4.2 Pipe Connection
4.2.1 Precautions for the Installation of Connection Pipe
（1）
Please comply with the following rules during pipe connection: Connection pipe should be as
short as possible, so is the height difference between indoor and outdoor units. Keep the pipe
bends as less as possible and the bend radius as large as possible.
（2）
Install the connection pipes by welding. Please strictly follow the requirements for welding
process. Rosin joints, weak joints or pin holes are not allowed.
（3）
When laying the pipe, be careful not to distort it. Radius of bending parts must be over 200mm.
Please do not bend or stretch the pipes frequently, otherwise the pipes will become hard. A
pipe shall not be bent or stretched for more than 3 times at the same position.
（
4
）
Please use moment wrench to connection the union nut of indoor unit. See below fig.
Fig 4.2.1
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.
