TECH ST-408, Руководство пользователя, Страница: 12 / 28

ST-408 – user's manual
IV. Installer menu
IV.a) Pump anti-stop
After activating this option, pump valve will activate every 10 days for
2 minutes. It prevents too long water stagnation in the assembly beyond the
heating season.
IV.b) Furnace sensor
In this submenu, the user determines basic furnace protection parameters
and pump activation.
IV.b.1) Return protection
This function permits setting the furnace protection against too cool
water returning from the main circulation, which could cause low-temperature
furnace corrosion. The return protection operates in the way that when the
temperature is too low, valve is closed, until the short circulation of the
furnace reaches the appropriate temperature. After activating it, user presets
the minimum acceptable return temperature.
IV.b.2) Furnace protection
The protection against too high return temperature serves to prevent
the hazardous growth in furnace temperature. The user sets the maximum
acceptable return temperature. In the case of the hazardous growth in
temperature, the valve begins to open to house installation in order to cool
the furnace down. This function is activated permanently (the possibility of
deactivation only in the service menu).
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