B) Firing-Up; C) Manual Operation - TECH ST-81 User Manual

II.b) Firing-up
The Firing-up functions switches the fan on or off during the
continuous operation of the controller. If the boiler temperature
exceeds 30 °C but does not reach the set value, the button is
used as a START/STOP button and the LCD displays Fan On/Off
message. This function allows to enable or disable fan during
the boiler operation.
The status is indicated by an asterisk in the right bottom corner
of the display (asterisk indicates that the fan is enabled). The
function allows safe operation of the boiler. The furnace door
must not be opened when the fan is on.
II.c) Manual operation
The controller can operate in manual mode for the convenience
of the user.
This function allows independent switching of all elements.
The OPTIONS button enables the blower. The blower is on until
the OPTIONS button is pressed again.
The OPTIONS button enables/disables the central heating water
pump.
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