Gree NCHS1D Owner's Manual page 24

(2) Manifolds can be laid in the following ways:
The length of a straight pipe between two manifolds cannot be less than 500 mm. The length
of a straight pipe before the main pipe port of the manifold cannot be less than 500mm. The
length of a straight pipe between the branch of the manifold and the IDU cannot be less than
500mm. See Fig.4.2.10.
(3) There must be three fixing point for both horizontal and vertical installation of the Y-type
manifold. See Fig.4.2.11.
Fixing point 1: 100mm on the main inlet manifold from the welding point
Fixing point 2: 200mm on the main branched pipe from the welding point
Fixing point 3: 250mm on the branched pipe from the welding point
(4) Thermal insulation for pipeline
1) To avoid condensate or water leak on the connection pipe, the gas pipe and liquid pipe
must be wrapped with thermal insulating material and tied by adhesive tape.
2) Thermal insulating material shall be able to bear the pipe temperature: For heat pump unit,
liquid pipe should bear 70°C or above and gas pipe should bear 120°C or above. For
cooling only unit, both liquid pipe and gas pipe should bear 70°C or above. Example:
Polyethylene foam (bear 120°C or above); foaming polyethylene (bear 100°C or above).
3) For one-to-one mode exchange box, low pressure gas pipe on the unconnected side
should be wrapped by the damping block. See Fig.4.2.12.
Fig.4.2.10
Fig.4.2.11
20
GMV6 HR Mode Exchange Box
Unit：mm
Unit：mm