Mikrofill Ethos RS 350, Техническая документация инструкция

Страница: 21 / 44

INSTALLATION
TECHNICAL DOCUMENTATION 21
WATER PRESSURE
At a maximum flow temperature of 90°C and with the nominal water flow that occurs at a ΔT of 20°K, the
minimum operating pressure should be at least 1.5 bar. The operating pressure should be measured when the
external pump is switched off. If a lower operating pressure is required, it will be necessary to adjust the
maximum flow temperature.
SYSTEM EXPANSION VESSEL
The size of the expansion vessel is determined by the water volume of the system. We recommend that the
system expansion vessel is installed on the return pipework in a suitable neutral pressure position.
WATER PRESSURE PROTECTION DEVICE
A 6 bar pressure relief valve is integral within the boiler casing. Should it be necessary to protect the system at
a lower pressure, an external safety valve will need to be fitted to the system.
WATER TEMPERATURE
The maximum permissible water flow temperature is 90°C. If the limit thermostat is triggered at 97°C, the boiler
will switch off and will automatically restart when the water temperature falls below the limit temperature that
has been set. The high limit thermostat is set to 100°C and if activated, the boiler will switch off and not
automatically restart when the temperature falls.
WATER QUALITY
The composition and quality of the system water directly affects the performance of any hydronic (water
filled) heating system. The life of the boiler and associated equipment will depend on the correct use of water
treatments and (when required) deaerators, water filters and / or air and dirt separators. This is particularly
important when connecting the boiler into an existing older system.
Care should be taken to ensure that pipework is sound and leaks are eliminated, thus reducing the need for
fresh ‘top up’ water to a minimum.