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Operating tips
The boiler and heating systems must
only be filled and operated with water
corresponding to the water quality
requirements (see chapter "Water qual-
ity requirements"). The system must be
commissioned by the system installer or
a qualified relevant expert authorised by
the installer.
Record all actual values in a test report.
These must be confirmed by the instal-
ler, commissioning expert and the sys-
tem user.
Within 4 weeks of the combustion equip-
ment being commissioned, the operator
must notify the local flue gas inspector
accordingly [check local regulations].
Shutdown
To prevent corrosion setting in, during idle periods when the boiler is not pressurised,
preserve the boiler surfaces on the flue gas and water sides, subject to the length of
the period during which the boiler is taken out of use. There is a differentiation
between wet preservation (during which exposure to oxygen is to be avoided) and
dry preservation (during which moisture levels are to be minimised).
Brief operational interruption
(1 to 2 days)
Water side
Recommendation: Maintain the boiler
pressure and temperature. If this is not
possible and the boiler needs to be dep-
ressurised for several days, we recom-
mend the following:
To prevent oxygen corrosion, approx.
one hour before shutting the boiler down,
add 2 to 3 times more oxygen binder
than usual to the feedwater until the
boiler is shut down.
Operating information
We recommend operating the boiler con-
stantly at a boiler water temperature of
70 °C and at the required operating pres-
sure. Even if no heat demand occurs for
a longer period of time, it is still better to
operate the boiler continuously.
In systems comprising several boilers, of
which one is constantly used as a
standby boiler, only change the opera-
tion over after longer intervals, e.g. dur-
ing the annual inspection of the total sys-
tem.
Operating instructions on pre-
serving the water and hot gas
sides
Flue gas side
Keep the heating surfaces dry. Remove
severe contamination as it binds mois-
ture.
7
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