Equipment functioning
5
Betriebsanleitung_firematic_20-301_Touch_Englisch V1.2
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5
EQUIPMENT FUNCTIONING
5.1
Feeder system
The fuel is transported from the fuel storeroom by
means of a feeder screw with flat spring stirrer for
burnback protection devices. It then passes
through the drop shaft and the burnback
protection device. The burnback protection device
is driven by a spring-loaded servo-motor. If the
servo-motor has no power supply then the flap
closes independently. Then the plug-in screw
feeds the fuel upwards. These are then directed to
the combustion chamber via a drop level. The fuel
level reached is crucial for the boiler capacity and
the operating condition of the equipment.
5.2
Type of feed
The operation of the firematic based on a pulse-
no-pulse ratio which controls the feed system. All
the values are to be set via the menu. These feed
values are corrected by the combustion control
system.
5.3
Combustion air control
Differentiation is made between primary and
secondary air (1+2) in the combustion air
supplied. The primary air is supplied directly into
the embers. Using secondary air an attempt is
made to fully develop the flame arising from the
primary air. The air supply is supplied via a lateral
opening (underneath the lateral panelling). The
flue gas ventilator is a suction fan and this is
located at the back of the boiler. It generates low
pressure in the boiler. The secondary and the
primary air are sucked out by this low pressure.
The blower is time-controlled by the variable-
speed electronic control. The blower speed is
controlled according to the boiler temperature and
rectified by the lambda control.
5.4
Boiler operation
The equipment goes into operation automatically
when heat is required due to its built-in automatic
ignition.
The heat requirement can be weather-driven
(optional), and can be used in conjunction with a
remote sensor (optional) from any heating circuit.
It is also possible to generate demand using a
room thermometer. The boiler can also switch on
the equipment via its heat requirement.
The control or local data of the boiler capacity can
be adjusted or changed.
The regulation prevents boiler temperatures falling
too low as this can affect the life expectancy of the
boiler.
Boiler temperatures that are too high are not
permitted for operational safety reasons.
Any elongation fissures on the insulation plates or
combustion chamber bricks do not affect their
functioning and therefore do not represent a claim
against the guarantee.
5.5
Safety devices
These must be dimensioned and installed to
conform with ÖN B8133.
The safety valve in the boiler circulation serves as
a safety last resort against malfunctions of the
equipment.
All legal safety regulations must be adhered to on-
site via the authorised specialist company. All
legal safety regulations must be adhered to on-
site via the authorised specialist company.
Earthing or potential equalisation must be carried
out on the machinery for the whole heating
system according to EN 60204-1 by an authorised
specialist company.
5.5.1
Safety temperature limiter
Should the boiler temperature exceed 95°C, the
equipment must be switched off for safety
reasons. The safety temperature limiter locks in
this event.
Possible causes may be:
Performance decrease in the boiler was
interrupted abruptly. This can occur due to the
switching off of a pump or sudden shutting of
the heating circuit mixer.
The load pumps are being controlled by the
HERZ
Control.
The
so-called
excess
temperature flue gas would be automatically
activated by the HERZ Control. This avoids
higher boiler temperatures.
The boiler is too large.
The fuel level is set too high.
Loss of power supply
Etc.
Firstly the cause of the failure must be found and
corrected and only then can the safety
temperature limiter be unlocked.