Installation Of The Connection Pipe - Gree GMV-ND224PH/A-T Manuel D'utilisateur

(3) When the outdoor unit is at higher position, oil loop is required to be set on the vertical pipeline for every 10m
from the down top. And also set oil loop and one-way trap at the lowest and highest position.
4.3.4 Oil Loop and One-way Trap
Fig.7 Oil loop
In case of not damaging the pipe, please check the following table for size of oil loop and one-way trap.
mm
Φ19.05
Φ22.2
Φ25.4
Φ28.6
Φ34.9
Φ38.1
Φ41.3
Φ44.45
Φ54.1

4.4 Installation of the Connection Pipe

4.4.1 Precautions When Installing the Connection Pipe
(1) Conform to the following principles during piping connection: Connection pipeline should be as short as
possible. The height difference between indoor and outdoor units should be as short as possible. Keep number
of bends as little as possible. The radius of curvature should be as large as possible.
(2) Weld the connection pipes between indoor and outdoor units. Please strictly conform to the requirements for
welding process. Rosin joints and pin holes are not allowable.
(3) When laying the pipes, be careful not to deform them. The radius of bending parts should be more than
200mm. the pipes cannot be repeatedly bent or stretched; otherwise the material will get harden. Do not bend
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GMV5 Compact Series VRF Outdoor Unit
A
inch
3/4
7/8
1/1
9/8
11/8
12/8
13/8
7/4
17/8
Fig.8 One-way trap
R
mm
≥34
≥31
≥45
≥45
≥60
≥60
≥80
≥80
≥90
13
C
mm
≤105
≤150
≤150
≤150
≤250
≤350
≤450
≤500
≤500