Gree A Series Service Manual page 82

Piping Flowchart
5.5.2.1 Check for Documents and Drawings
(1)Check the process flow, construction procedures and quality requirements in accordance
with drawings and technical data.
(2)Check the installation location, installation height, arrangement, and installation space of
pipes in accordance with equipment drawings and building drawings.
5.5.2.2 Check for Materials
(1)Before installation, check for the mode of the valves, clean them and then take the
strength and air-proof tests.
(2)Pipes should be cleaned with a steal brush or abrasive paper. After that, seal the pipe
ends and keep both the internal and external surface dry.
(3)Pipes should be painted twice with anti-rust paint without any curtaining and voids.
5.5.2.3 Prefabricating
(1)Make out the installation drawing which clearly indicates the branch pipes, pipe diameter,
reduced pipes, location of valves, installation dimensions etc. Then, prefabricate pies in
accordance this installation drawing. Pipes should be processed with dedicated cutting
machine, leaving no burrs at the pipe ends. After that, pipes should be cleaned to prevent
sands and dusts from damaging the joint.
(2)Pipe supports should be prefabricated in accordance with design requirements. The
contact part between supports and pipes should be separated with wood blocks which has
taken anti-corrosion treatment and is as thick as the insulation.
A Series Modular-type Air-cooled (Heat Pump) Chiller
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