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Mareli Systems
5. SAFETY MEASURES
5.1 Safety measures in case of overheating
For the hydraulic protection in the closed system, it is necessary to install a 4-way thermal safety
valve, as in the gure below (it is not included in the standard supply).
If for some reason the water temperature in the boiler exceeds 95°C, the thermal valve opens au-
tomatically, so that cold water from the network enters the boiler, to reduce the temperature of the
heating agent, and an equal volume of heating agent from the boiler is discharged at sewage.
According to European EN standards, boiler thermal protection must be installed in closed heating
system.
IMPORTANT:
In case of any damage of boiler installed in the closed heating system due to its overheating, and
boiler or system are not equipped with any thermal protection at all, or do not have properly
installed thermal protection, guarantee will not be applied.
IMPORTANT:
ermal protection must be connected to the water supply installation of the premises supplied
from the water supply line and not from hydrophor. Namely, in case of failure of power supply,
boiler could be overheated, and then hydrophor is not able to ensure required water supply.
Maximum length of the sensor must not exceed 120 mm.
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