Gree A Series Service Manual page 71

A Series Modular-type Air-cooled (Heat Pump) Chiller
No
Item
Spring-type check valves are good choices when there is high requirement on
2
the sealing performance.
Quick-closing check valves or slow-shut check valves with damping devices
3
are good choices when the water hammer is required to be reduced.
The valve clack should be automatically closed with force of gravity or spring
4
force.
Release At the end and the highest point of the water supply network.
1
Valves
At the peak of some pipe section in the water supply network where a huge
2
Required
amount of air is trapped.
for the
Water
At the highest point of the water supply network equipped with an automatic
3
Supply
pneumatic water tank.
Pipes
5.2.3.5 Filters for the Water System
The most commonly used filter is the Y-shaped filter which is usually installed at the inlet of
the water pump, reducing valve, locating valve, or other equipment. It is used to remove
impurities in the water system so as to protect valves and make the unit run normally. Its mesh
number generally is 18~30.
e.g. 1: YBY350Ⅱ-4.0/40B: it indicates YBY series, 350 nominal diameter, 4.0MPa, Ⅱ，
stainless steel, 40 meshes/ inch.
e.g. 2: YBY250Ⅲ-1.6/60 A : it indicates YBY series, 250 nominal diameter, 1.6MPa，Ⅲ，
stainless steel, 40 meshes/inch
5.2.3.6 Water Softeners
Water at the construction site is likely to be hard, which would cause heavy scale on the
pipes. Therefore, a water softener should be installed in the unit. Generally, an automatic
softener is preferred.
Electric Water Treating Equipment: it is used to remove impurities, hydrocarbonate,
bacterial, algae etc. in the cooling water.
Selection Principle
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