ST – 480
pause length should be adapted to the fuel type combusted in the boiler. Wrong
selection of operation and/or pause times may result in boiler malfunctioning
i.e. the fuel may be not fully combusted or the boiler may not reach the preset
temperature. Selection of appropriate times will ensure proper operation of the
boiler
II.7.
Temperature alarm
The function is activated in the
operation
mode only (i.e. when the boiler
temperature is lower than the
preset temperature
). If the temperature is not
rising for a period defined by the user in that function an alarm is activated: the
feeder and the blower are turned off (the pump is turned on and off
independently) and sound is produced. A message reading
“Central heating
system temperature is not rising”
appears on the display. The alarm is cancelled
by pressing the pulser knob.
II.8.
Blowing rate
The function controls the fan operating speed. The adjustment range is
between 1 and 100% (equivalent to fan speeds). The higher the speed is, the
faster the fan operates where 1% stands for the minimum fan speed and 100%
is the maximum speed.
II.9.
Pump operation modes
This function allows you to select one of the following four boiler operation
modes:
II.9.a)
House heating
When you select this option the controller switches over to a mode where
heating is provided only to heat the central heating circuit. The central heating
pump begins to run above the pump activation temperature (factory set at 38
O
C
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