Inspection and maintenance
54
Installation and maintenance instructions ecoTEC pro 0020129672_03
12
ing installation, ideally with nitrogen, otherwise with air.
Ensure drain valve on boiler is open during topping up.
>
If water escapes from the measuring stub pipes (
1
) of the
expansion vessel, you must replace the expansion vessel.
12.4 Checking the gas flow pressure
>
Check the gas flow pressure (
¬ section 10.9.4
).
12.4.1 Checking CO
2
content
>
Check the CO
2
content (
¬ section 12.1.3
).
