Gree GMV-224WM/G-X Owner's Manual page 34

GMV DC Inverter VRF
(3) The branches of the manifold should be parallel and should not be overlapped.
(4) The liquid pipe and the gas pipe should have the same pipe length and the same laying circuit.
(5) Since the structure of the manifold is relatively complicated, it must be rigorous and careful
for heat preservation to ensure the tight insulation.
3.4.4 Refrigerant Pipe Insulation
(1) Insulation Material Selection
1) Insulation materials should be made of materials that can withstand pipeline temperature:
For heat pump unit, liquid pipe should bear 70℃ or above, and gas pipe should bear 120℃
or above. For cooling only unit, both liquid pipe and gas pipe should bear 70℃ or above.
Example: heat-resistant polyethylene foam (resistant to 120 ℃ or more); foamed
polyethylene (resistant to 100℃ or more).
2) When the diameter of the copper pipe is more than or equal to Φ15.9mm, the wall
thickness of the insulation material is no less than 20mm; when the diameter of the copper
pipe is less than 15.9mm, the wall thickness of the insulation material is no less than 15mm.
(2) Pipeline Wrapping
Fig.3.4.9
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