Metal-Fach ecoMAX 860P, User'S Manual And Installation

Page: 41 / 48

41
15. ALARM DESCRIPTION
15.1 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 temp., 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.
The alarm can be reset by pressing the
encoder “TOUCH and PLAY” knob or restarting
the power supply.
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.
15.2 Exceeding max. feeder
temperature
This alarm will occur after the feeder
temperature exceeds the parameter Max.
feeder temp. 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 “TOUCH and PLAY” 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.
15.3 Faulty fuel feeding system
This alarm occurs when an electronic control
circuit of the feeder is damaged. In that case
the feeder become controlled by an
electromechanical relay and because of that
feature boiler operation will not stop – which
is especially important during heating season.
The regulator then works in the safe mode,
which is indicated by a prompt „Feeder control
system failure” on the screen.
In the event of an alarm, stop the operation
of the boiler and repair immediately
regulator.
The alarm can be reset by pressing the
encoder “TOUCH and PLAY” knob or restarting
the power supply.
It is also possible to continue operation in
emergency
mode. Before continuing
operation, sure that the combustion chamber
does not contain excessive unburnt fuel. If so,
remove the excess fuel. Ignition with
excessive fuel may lead to explosion of
combustion gasses!
Note: operating in emergency
mode is allowed only under user
supervision and until the arrival of
the service team to remove the
failure. If user supervision is not
possible, extinguish the boiler.
When operating in emergency
mode, prevent the consequences
of improper feeder work (feeder
working constantly or not at all).
15.4 Boiler temp. sensor damaged
This alarm occurs in case of boiler
temperature sensor damage and excess of its
measurement range. Upon occurrence of this
alarm, boiler, HUW and mixer pumps start to
possibly cool down the boiler. To reset the
alarm - switch OFF and ON the regulator.
Check the sensor and replace it, if necessary.
Checking temperature sensors
described in this manual, in
point.12.9.