Air Source Screw Water Chiller Unit – Installation Operation and Maintenance Manual
46
to refrigerant leakage. An overlarge water flow will cause corrosion.
Do not expose the water in the circulating system to the air, as shown in the following figure.
If water is exposed to the air, the amount of the dissolved oxygen will increase, and atmosphere
pollutants will coagulate in water. As a result, water may be corrosive.
Do not connect any other electric appliances to the ground, and then to the water piping of the unit.
This may cause electrolytic corrosion of the water piping.
Anticorrosive measures must be taken for buried piping.
To prevent generation of air pockets, pay attention to the water flow speed in the water pump system
and the positions of the expansion tank and the exhaust plug.
If the pH value of the water exceeds the standard value, the corrosion of coppers will be accelerated.
Therefore, change the water before the pH value reaches the standard value. If the heat storage tank
is still in use after expiration, the cracks on the heat storage tank may cause water splashing and
leakage. Water leakage will not cause serious problems to water quality control. However, if sea water
or polluted underground water spills, microorganisms may breed in the water heat storage tank. This
will generate debris in the system and cause the adhesion of calcium carbonate.
A flexible tube should be installed on the unit and on the water inlet and outlet pipes of the water pump,
to prevent the vibration in water pipes from being transmitted to buildings.
A drainpipe must be installed at all water outlets. Pay attention to the front and behind distribution of
the water inlet and outlet. Observe the identification label on the unit carefully. Do not make a mistake.
Based on engineering requirements, the design of the evaporator's water inlet and outlet pipes must
follow the following criteria:
a)
The outlet of the circulation pump in the pipeline must be connected to the inlet of the evaporator.
The inlet of the pump must be connected to the water return pipeline instead of the evaporator.
b)
A water stainless steel strainer with more than 25 meshes must be installed on the inlet pipeline of
the evaporator.
c)
Before you run the unit, clean all chilled water pipelines thoroughly and remove all foreign matters.
Do not crush any foreign matter into the evaporator.
