Pereko AGRO Multi 12, Operation And Maintenance Manual

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17 ALARM DESCRIPTION
17.1 No fuel
In case the boiler temperature dropped in
OPERATION mode by the value of
DelT lack
of fuel below the boiler preset temperature,
the regulator starts counting No fuel
detection time.
MENU Service Settings Boiler
Settings No fuel detection time
If, upon elapsing this time, the boiler
temperature has not increased by 1 C, the
regulator switches off heat recipients and
starts counting
No fuel detection time again.
If temperature has not increased after this
time by 1 C, the regulator enters STOP
mode and generates alarm "No fuel”. To
reset the alarm - switch OFF and ON the
regulator.
In case the regulator erroneously
detected lack of fuel - increase the
value of parameter of No fuel
detection time - see sec. 122 or
decrease the value of DelT lack of
fuel.
17.2 Max.boiler temp. excess
Protection against boiler overheating
comprises two stages. In first instance i.e.
once the
Boiler cooling temp. has been
exceeded, the regulator attempts to reduce
the boiler temperature by activation of the
boiler pump, HUW pump and opening the
mixer servo (only in case mixer circuit = CH
ON). Has the temperature dropped - the
regulator returns to normal operation. Is the
temperature still increasing (and has reached
95 C), power supply to the fuel feeder and
the fan is off and permanent boiler
overheating alarm with sound signal is
produced. If, during boiler overheating time,
temperature measured by HUW sensor is
higher than
Max. HUW temperature , HUW
pump goes off. In this manner, users of hot
utility water are protected from burning. The
alarm is reset by switching the regulator off
and on.
Note: arrangement of temperature
sensor outside the boiler water
jacket (e.g. at the outlet pipe) is
not recommended because boiler
overheating may be detected with
delay.
If the regulator is in the SUMMER mode, the
regulator attempts in first instance to
discharge excess heat to HUW container. The
HUW pump goes OFF if the temperature
measured by the HUW sensor is in excess of
max HUW temperature .
17.3 Exceeding max. feeder temperature
This alarm will occur after the feeder
temperature exceeds the service parameter:
Service settings Boiler settings
Max. feeder temperature
If the feeder temperature exceeds this value,
the regulator will enable the feeder for a
constant, programmed time and will activate
the poker. The airflow is disabled and the
pumps are enabled. After „pushing the fuel
out”, the regulator disables the feeder and
does not activate it again, even if the feeder
temperature is still high.
This alarm can be cancelled only after the
feeder temperature decreases, by pressing
the encoder knob or by restarting the
regulator.
The function of protection against
flame recession is inoperative if the
feeder sensor is disconnected or
damaged.
The function of protection against
flame recession is inoperative if the
regulator is not powered.
Regulator cannot be used as the
only protection against flame
recession in a boiler. Use additional
protective automatics.
17.4 Feeder temp. sensor damaged
This alarm occurs in case of boiler
temperature sensor damage and excess of