GMV5 Home DC Inverter Multi VRF Units
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Branches of a manifold must be laid parallel and cannot be wrapped in superimposed mode.
6）The liquid pipe and gas pipe must have the same length and be laid in the same route;
7）The Y-type manifold has an attached pipe used to adjust the diameter of different pipes. If
the pipe size on site does not match the size of the manifold junction, use the pipe cutter to cut at
the middle of the pipe and remove burrs. Then insert the copper pipe to proper depth. A concave
bag for positioning is available to the manifold purchased from Gree.
8）Because the manifold structure is complex, perform with care to ensure tight insulation.
9.4.1.2.7 Pipe cleaning by nitrogen
Before connecting the flare opening of the pipe to the IDU, connect the pressure regulator
valve on the nitrogen cylinder to the liquid pipe in the outdoor pipe system. Regulate the nitrogen
pressure to about 5kgf/cm² and blow nitrogen into the pipe for 1minute. Repeat this operation for
three times till the dirt and water are discharged. After cleaning the liquid pipe, perform the same
operation to clean the gas pipe.
Perform an air-tightness test and a vacuum test to the entire refrigerant pipe system after the
construction is finished.
There must be a secure distance between pipes. Pipes in different types must be fixed
separately.
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