Gree R410A, Manual

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47
for North America
Photovoltaic Direct-driven VRF
7 Installation of the Connection Pipe
1) Conform to the following principles during pipe connection: Connection pipe should be as short as
possible, so is the height difference between indoor and outdoor units. Keep the number of bends as little
as possible. Radius of curvature should be as large as possible.
2) Weld the connection pipe between indoor and outdoor units. Please strictly follow the requirements for
welding process. Rosin joint or pin hole is not allowed.
3) When laying the pipe, be careful not to distort it. Radius of bending parts should be over 200mm(8inch).
Note that pipes cannot be repeatedly bent or stretched; otherwise the material will get harder. Do not
bend or stretch the pipe for more than 3 times at the same position.
7.1 Flaring Process
1) Use pipe cutter to cut the connection pipe in case it is unshaped.
2) Keep the pipe downward in case cutting scraps get into the pipe. Clear away the burrs after cutting.
3)
4)
d1 d2
d1
d2
90° ±1°
7.1.1 Pipe Bending
1) Reshape the pipe by hand. Be careful not to damage the pipe.
Correct Wrong
2) Do not bend the pipe over 90°.
3)
bend for over 3 times.
4)
bend the pipe until it is exposed. When bending is done, wrap the pipe with insulating layer and then secure it with adhesive tape.
7.1.2 Indoor Pipe Connection
1) Remove pipe cover and pipe plug.
2)
3)
at right angle to the pipe.
1) Use sponge to wrap the un-insulated connection pipe and joint. Then tie the sponge tightly with plastic
tape.