Invest ISP 2.0, Руководство по установке, Страница: 8 / 36

(Schematic drawing for the liquid filling components)
Open the automatic exhaust valve first and close the valve at the inlet of the expansion tank. Connect
the outlet of the liquid filling pump to valve 1 and ensure that the water flows in the same directions for
mounting check valve. Connect the suction nozzle of the pump and water-return pipe to the liquid filling
tank. Close valve 2 and open the valve below the highest automatic exhaust valve on the array of the
collector. Allow the liquid filling pump to fill water into the system. Observe the water flowing back and
close the water return valve 3 (marking it) when you find that the returned water is clean and flows evenly,
and there are no more bubbles. Pressurize it at the pressure which is 1.5 times the pressure for opening
the relief valve. Observe the connection points carefully to find out if there is any leakage or oozing. It
passes the test when there is no leakage or oozing, and the pressure drop is less than 0.02MPa in 10
minutes.
Attention:
a. The test pressure is 1.5 times of the pressure for opening the relief valve;
b. Notice the relative position of the relief valve and manometer.
3. Pipe cleaning:
Pipes shall be cleaned before and after testing the pressure of the system by flushing them and cleaning
the filter. Then drain the liquid from the pipe so as to fill antifreeze; if the liquid is not drained up from the
system, you can blow the liquid out with a blower; blow it until it is dried up.
4. Antifreeze filling:
The process for filling antifreeze is same as the above. The different work is that the valve connecting
to the expansion tank must be opened before filling the antifreeze; it should also be noticed that the
pressure for filling the liquid must be consistent to pre-filling pressure of the expansion tank, 0.15MPa to
0.2MPa in general;
5. Close valve 4 below the automatic exhaust valve when antifreeze is fully filled to prevent the medium
vaporizing when the system operates;
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