Gree GMV-VQ280WM/C-X Owner's Manual page 24

3.2.6 Shock absorption requirements
The outdoor unit should be firmly fixed. Thick rubber sheets or corrugated rubber damping rubber
mats with a thickness of 20mm at least and a width of 100mm at least should be placed between the
unit and the foundation. The installation requirements are shown as follows.
3.3 Pipeline Design
3.3.1 Notices for Pipeline Design
(1) Air-conditioning installation should not damage the load-bearing structure and decorative
style of the building.
(2) Air-conditioning pipes should be laid along the bottom of the beam. If the pipes meet at the
same elevation, they should be treated as follows:
1) Drain pipes, ducts and pressure pipes avoid gravity pipes.
2) Ducts and small tubes give priority to big tubes.
(3) It should be ensured that the direction is correct, the branch is reasonable, the length is the
shortest, and the brazed joint and bend are minimized.
(4) The refrigerant pipe must bypass the inspection port of the unit, leaving sufficient
maintenance space.
(5) The vertical pipe should be laid in the air conditioning pipe well. The horizontal pipe should
be laid in the ceiling.
3.3.2 Pipeline Requirement
Pipe specification is shown as follows:
External diameter(mm)
Φ6.35
Φ9.52
Φ12.70
Φ15.9
Φ19.05
Φ22.2
Φ25.40
Φ28.60
Φ31.80
Fig.3.2.11
R410A Refrigerant System
Thickness(mm)
≥0.8
≥0.8
≥0.8
≥1.0
≥1.0
≥1.2
≥1.2
≥1.2
≥1.3
20
GMV Heat Recovery DC Inverter VRF
Type
O
O
O
O
1/2H
1/2H
1/2H
1/2H
1/2H