Servicing
46
12.1 Instructions before Putting into Operation
Expansion tank filling valve. Pressure in the
expansion tank shall be set according to the
heating
system
designing
documentation.
Pressure in the expansion tank shall be checked
during the regular annual servicing inspection.
Bleeding valve of exchanger
During bleeding, use for example a silicon hose
of ø 6 and a small container to protect boiler
electronics from water leakage.
Loosen a screw at the valve. If the system is
being breathed, air starts coming out from the
exchanger. At the moment when water starts
coming out, the exchanger is deaerated. So the
screw might be retightenend. Repeat this
procedure several times until the system is
completely deaerated.
