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   Water treatment in larger systems including

several boilers

Time effect of this treatment method is of considerable advantage in this case. With respect to the total volume of water in the system and capacity of circulation pumps it is possible to place a water treatment unit at the return piping of one of more boilers - Alt. 1 (the one that is continuously in operation) or at one of return piping connected to the water-collecting header - Alt. 2. For such method it is recommended to take into consideration the calculation that the total volume of water in the system should flow through the point of treatment at least once in 24 hours. Another possibility includes artificial closing of the heating circuit through a reduction valve, desludging unit (for higher water hardness or water losses in the system) and through the treatment itself.
In all the alternatives it is possible to obtain a sufficient water treatment process for economically lower costs. It is important to make sure the boilers or filters used are regularly desludged. The treatment of additional water is recommended for higher water losses in the system. Heat exchangers have similar water treatment procedure to boilers.

Water treatment in larger systems including several boilers

Figure 14 shows another possibility of water treatment in closed systems. The desludging filter is placed in the main return piping and the treatment is applied only to the piping of some suitable diameter. The selection of the diameter depends on the total flow Q and the amount of water in the system.


Another possibility of water treatment in closed systems
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