Protective Devices - SAS BIO SOLID 19 Operation And Maintenance Manual

To ensure possibly failure-free and safe operation, the boiler controller is equip-
ped with numerous protective devices. The software installed controls operation of
semi-assemblies and performs monitoring and safety operations to prevent hazardo-
us conditions (e.g., power outage and its restoration). When any incorrect status is
found an audio alarm is activated, and a relevant message is shown on the display
(see the controller operating manual). To eliminate the effect of voltage fluctuations
or incorrect voltage in the mains, a system controlling the fan rotational speed was
installed (the Hall effect sensor).
When the equipment is installed, each boiler undergoes a test of correct ope-
ration of the control system. The temperature regulator, burner control module,
wiring and the supply terminal strip are installed in the insulation lid on purpose,
to eliminate access to locations posing a hazard of an electric shock. Appropriate
tools must be used to remove them.
TEMPERATURE ALARM
This security device is activated only in the operational mode (when the boiler
temperature is below the set temperature). When the boiler temperature does not rise
in the time specified by the user, the alarm is activated, the feeder and the blower are
switched off, and the audio signal is alarmed. The screen displays the following mes-
sage: "Temperature does not increase". When the encoder is pressed, the alarm
is switched off. The controller returns to the last set operational mode.
AUTOMATED SENSOR MONITORING
When the central heating system, the domestic hot water sensor or the fuel
feeder sensor is damaged, the audio alarm is activated signalling additionally a
relevant defect on the display, e.g.: "Central heating sensor damaged". The feeder
and the blower are switched off. The pump works regardless of the current tempe-
rature. When the central heating or the feeder sensor is damaged, the alarm will
remain active until the sensor is replaced with a new one. When the domestic hot
water sensor is damaged, press the encoder knob, switching off the alarm, and
the sensor will return to the central heating pump operation). The the domestic hot
water sensor must be replaced with the new one to enable the boiler operation in
all modes.
TEMPERATURE PROTECTION
The controller is provided with additional software (digital) temperature pro-
tection against dangerous increase in the temperature. When the alarm tempe-
rature (set within the 80°C÷85°C range) is exceeded, the blower fan and the fuel
feeder are disconnected. At the same time, active pumps start to work to distribu-
te heat in the system. When the boiler alarm temperature is exceeded, the audio
alarm is activated and the message is displayed "Temperature too high". When
the temperature returns to the safe value, the alarm is switched off by pressing the
encoder, and the regulator returns to the last set operating mode.
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12. PROTECTIVE DEVICES