GMV5 Home DC Inverter Multi VRF Units
155
finished.
Equip a pressure regulator valve to the nitrogen cylinder.
The nitrogen flow is above 4-6 L/min (pressure of 0.02 to 0.05Mpa) and must be regulated
based on the pipe caliber.
9.5.1.2.6 Requirements on manifold installation
Manifolds are used to divert refrigerant. Requirements on manifold installation are as follows:
1）Ensure that the manifold is close to the IDU to reduce impact on refrigerant assignment by
IDU branches;
2）The manifold must be that specified by the manufacture and match with the devices;
3）Ensure that the manifold model is correct;
4）Manifolds can be laid in the following ways:
（1）Horizontal installation: The three ports must be on the same level. The shaping size and
assembly angle cannot be changed;
（2）Vertical installation: The direction can be upwards or downwards. Three ports must be on
the same elevation without inclination;
（3）The length of a straight pipe between two manifolds cannot be less than 500 mm;
（4）The length of a straight pipe before the main pipe port of the manifold cannot be less than
500 mm;
（5）The length of a straight pipe between the branch of the manifold and the IDU cannot be
less than 500 mm;
5）Fixing of manifolds
There must be three fixing point for both horizontal and vertical installation of the Y-type
manifold:
Fixing point 1: 100 mm on the main inlet manifold from the welding point;
Fixing point 2: 200 mm on the main branched pipe from the welding point;
Fixing point 3: 250 mm on the branched pipe from the welding point.
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