ST – 480
V.4.
Protection against boiling of water in the boiler
This protection is applies only to
reboiler priority
operation mode. When the
set reboiler temperature is e.g. . 55
O
C and the actual temperature in the boiler
increases up to 62
O
C (this is the so-called the priority temperature), then the
controller will turn off and the feeder the fan. If the temperature in the boiler
still increases up to 80
O
C, the CH pump will be activated. When the
temperature still increases, then the alarm will be activate at the temperature
of 85
O
C. Most often such a condition may appear when the reboiler is
damaged, the sensor is improperly fitted or the pump is damaged. However,
when the temperature drops, then at the threshold of 60
O
C the controller will
turn on the feeder and the blow-in and will run in the operating mode until the
temperature of 62
O
C is reached.
V.5.
Temperature protection
The regulator has an additional protection in the event of damage of the
bimetallic sensor. After exceeding the temperature of 85ºC, the alarm is
activated, signalling the following on the display: "
Temperature too high
".
Despite damage of the bimetallic sensor, the controller receives information on
the current temperature in the boiler from the electronic sensor. In the case of
exceeding the alarm temperature, the fan is turned off and, at the same time,
both pumps begin to operate in order to distribute hot water across the house
installation.
V.6.
Fuel container protection
On the fuel feeder there is an additional temperature measuring sensor.
In the event of its significant increase (above 70
O
C), the alarm is activated;
the feeder is activated every 10 minutes, which causes pushing the fuel to the
combustion chamber. This way the feeder sensor protects against fuel ignition
in the container.
V.7.
Fuse
The regulator has a WT 6.3A tubular fuse insert, protecting the network.
Using a fuse with a higher value can cause damage to the existing controller.
ATTENTION:
The fuse of higher value should not be used. Assembling the
fuse with a higher value may cause damage to the controller.
VI.
Maintenance
The
ST-480
controller must be checked for the technical condition of its wires
before and during the heating season. You should also check the mounting of
the controller, clean it of dust and other contamination. Furthermore, you
should also measure the effectiveness of the grounding of the motors (central
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