TECH ST-431, Руководство пользователя

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ST-431 – user manual
IV.c) Boiler sensor
In this submenu, the user determines basic boiler protection parameters
and pump activation.
IV.c.1) Return protection
This function permits setting the boiler protection against too cool water
returning from the main circulation, which could cause low-temperature boiler
corrosion. The return protection operates in the way that when the
temperature is too low, valve is closed, until the short circulation of the boiler
reaches the appropriate temperature. After activating it, user presets the
minimum acceptable return temperature.
IV.c.2) Boiler protection
The protection against too high return temperature serves to prevent
the hazardous growth in boiler 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 boiler down. This function is activated permanently (the possibility of
deactivation only in the service menu).
IV.c.3) Pump activation
This option allows to select the working mode of a pump. A pump shall
be activated: always (pump operates all the time, regardless of
temperatures), never (pump is permanently deactivated and the regulator
controls only operation of the valve, above the threshold (the pump is
activated above the set activation temperature ). In the case when the
circulation pump is connected with the boiler controller, it is recommended to
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