Invest ISP 2.0, Руководство по установке, Страница: 7 / 36

Concentration
（
volume
percent
）
5 10 15 20 25 30 35 40 45 50 55 59
Freezing point
℃
-1.7 -3.3 -5.3 -7.2 -9.7 -12.8 -16.4 -20.9 -26.1 -32 -39.7 -50
The processes for filling liquid:
1. Inspect the pipes which have been connected to make sure that the check valve, gate valve, filter and
circulation pump are connected correctly, and that the pipes and connectors have been tightened while
the pipes have been fixed firmly (for the pipe connection, see the figure below);
2. Pressurization test
（
Pressurizing with water
）
:
(Principle schematic drawing of the heat collecting system)
5