Gree GMV MTAC VRF Series, Руководство по обслуживанию

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Gree GMV MTAC VRF for North America
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Rated capacity of IDU C(Btu/h) Gas pipe (mm/inch) Liquid pipe (mm/inch)
48000<C≤55000
Φ 19.05
( Φ 3/4)
Φ 9.52
( Φ 3/8)
55000<C≤96000
Φ 22.2
( Φ 7/8)
Φ 9.52
( Φ 3/8)
NOTICE! If the distance between IDU and its nearest branch is over 10m(33feet), then the liquid
pipe of IDU (rated capacity ≤17000Btu/h) shall be enlarged.
6 Installation of 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.
6.1 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) Remove the flared nut connecting indoor connection pipe and outdoor unit. Then use
flaring tool to fix the flared nut into the pipe (as shown in Fig.10).
(4) Check if the flared part is flaring evenly and if there is any crack.
Fig. 10
6.1.1 Pipe Bending
(1) Reshape the pipe by hand. Be careful not to damage the pipe.
(2) Do not bend the pipe over 90°.
(3) (If pipe is repeatedly bent or stretched, it will get hard and difficult to bend and stretch
again. Therefore, do not bend or stretch the bend for over 3 times.