GREE Photovoltaic Direct-driven Inverter Multi VRF Units
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Max Indoor Unit Capacity connectable is 14kW. If T-Type manifold pipe connectable Indoor Unit
Capacity satisfy demand ——48KBtu/h
＜
Indoor Unit Capacity≤54 KBtu/h,follow need to supply also
Reducer / Expander Pipe to connect furthermore gas pipe
：
pipe size transition Φ15.9mm(5/8 in.) to
Φ19.05mm(3/4 in.).
(7) The liquid pipe and gas pipe must have the same length and be laid in the same route.
(8) 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.
(9) Because the manifold structure is complex, perform with care to ensure tight insulation.
6.1.3.7 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 5 kgf/cm² and blow nitrogen into the pipe for 1 minute. 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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