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4.9 BY-PASS
The boiler has an automatic by-pass and, therefore no regulation is required. In the case of load losses in the
system caused for example by the intervention of thermostat or area valves, the by-pass guarantees a flow
in the condensing main exchanger of at least 350l/h.
The by-pass is therefore designed to protect the condensing main exchanger from overheating in the case of
poor or insufficient water circulation.
If this condition occurs, the system regulates the power normally and then switches off the main burner when
the set-point temperature is reached.
The by-pass is positioned in the delivery unit and is built-in the same block of the 3 bar safety valve.
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