DOMUSA TEKNIK EVOLUTION EV 20 HFC, Installation And Operating Instructions Manual

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Evolution EV HFC
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16.2 Anti-frost protection
The Evolution boiler has a function for preventing frost damage to the installation. This will
function as long as the appliance remains plugged into the mains. Despite this function, and
particularly in areas with very cold weather, we recommend taking precautions in order to prevent
damage to the boiler. It is advisable to add anti-freeze to the water in the heating circuit. If the
boiler is to be out of use for long periods of time, we recommend draining all the water and leaving
it empty.
16.3 Boiler water characteristics
In areas with water hardness of over 25-30ºF, treated water must be used in the heating installation
to avoid any scale deposits on the boiler.
It should be noted that even a few millimetres of scale will greatly reduce the boiler’s heat
conductivity, causing a major drop in performance.
Treated water must be used in the heating circuit in the following cases:
- Very large circuits (containing a large amount of water).
- Frequent filling of the installation.
If repeated partial or total draining of the installation is necessary, we recommend filling it with
treated water.