Buderus Logano GE515 Installation And Maintenance Instructions Manual page 62

14 System inspection and maintenance
The water pressure in the system is too low, if the
pressure gauge needle falls below (Fig. 78, [2]) the
green range (Fig. 78, [3]). You then need to re-fill the
heating system with make-up water (
"Filling the system", page 50).
SYSTEM DAMAGE
through temperature stresses.
CAUTION!
Never fill the heating system during
operation via the KFE tap on the boiler.
Instead use only the fill tap in the
pipework (return) of the heating
system.
Fill make-up water through the fill tap in the heating
system pipework (return).
Vent the heating system.
Check the water pressure once more.
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chapter 12.1
Logano GE515 - We reserve the right to make any changes due to technical modifications.