Metal-Fach SEG PELLET, Technical And Operational Documentation, Page: 29 / 60

METAL-FACH Heating Technology
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The coil mounted on the system feed is connected to a cold water pipe, which flows through it only when a
thermal valve with a sensor immersed in the boiler feed opens when the set temperature is exceeded. The
water passes through the coil and removes heat from the boiler water jacket, after which it is discharged into a
cooling sump, as directing the hot water directly into the sewer pipes could damage them.
The coil is capable of lowering the temperature of water in the boiler jacket by several degrees in several
seconds. If the temperature of water in the boiler jacket falls below the preset value, the valve closes the water
supply to the coil.
Boiler protection scheme with integrated cooling coil and thermal protection.
In solutions with a safety coil built into the boiler, for example, thermal protection is used.
Solid fuel boilers with automatic fuel feed do not pose a significant risk of uncontrolled temperature rise in the
heating system as the amount of fuel fed to the burner is small. In addition, if the temperature rises, safety
devices and actions are automatically activated without user intervention.
However, if something does not work properly, the controller will switch off the feeder for 30 seconds to remove
the embers from it. If the feeder temperature does not decrease two minutes after the attempt to remove the
embers, the controller will make another attempt. If the controller fails to reduce the feeder temperature after
four attempts after the temperature of 85°C is reached, the boiler will be stopped and t
he boiler will be put out
on an emergency basis.