Requirements On Piping - Gree A Series Service Manual

A Series Modular-type Air-cooled (Heat Pump) Chiller
Keep the purge valve of the water system open in order to drain the evaporator and
condenser completely.
5.5.2

Requirements on Piping

(1)The piping slope should meet design and construction regulations and the flexible pipe is
not allowed to be longer than 150mm.
(2)Pipes which go through the dilatation joint and the settlement joint should be protected
with the flexible joint.
(3)No matter which connection is used, welding, threaded connection or flange connection,
the connection joint can't be in the wall, floor or sleeve pipe.
(4)The riser pipe should be installed vertically. When the floor height is or less than 5m, a
pipe clip is required. When the floor height is or larger than 5m, at least 2 pipe clips should
be required. The installation height of the pipe clip is 1.8m. For the main riser pipe, it
should be secured with the fixed bolster to support the weight of the riser pipe.
(5)See the table below for the installation standards of the pipes.
Item
DN≤100mm
Straightness
DN＞100mm
Verticality
Interval of Parallel Pipes
Parallelism of Parallel Pipes
NOTE
Allowable Deviation
2L‰，max.440mm
3L‰，max.460mm
25L‰，max.425mm
15mm
3mm
76
Inspection Method
By the ruler, tape measurement
By the ruler, tape measurement
By the ruler, tape measurement
By the ruler, tape measurement