" slots
3
16.2 Prevents of freezes
The boiler Evolution has a feature that garnishes of possible deteriorations of the installation
because freezing, whenever it makes sure the correct electric energy supply. Anyway, and
mainly in fields flogged by very low temperatures, it is recommended to take diligences with
the purpose of avoiding damages in the boiler. It seeks advice to add anticer to the existing
water in the heating circuit.
16.3 Boiler water characteristics
When the water hardness is higher than 25-30º F, the use of treated water for the heating
installation is prescribed, in order to avoid the possible lime deposits on the boiler.
The treatment of the water used in the heating circuit is essential in the following cases:
- Very long circuits (with high water content).
- Frequent installation filling operations.
If it is necessary to drain the installation either partly or fully, the filling with treated water is
prescribed.
17 CIRCULATING PUMPS FLOW CURVES
It will be possible to obtain, in the following diagrams, the hydrodriving pressure available in the
installation at the boiler exit, having taken the boiler pressure drop into account. These charts
include three curves corresponding to the three speeds of the circulating pumps provided with
the boiler.
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