8
Brief interruptions of operation
If you temporarily do not wish to use your boiler sys-
tem, maintain the boiler water temperature at 95 °C to
prevent corrosion through ingress of oxygen into the
boiler water.
Longer interruptions of operation
Shut down your heating system completely if it will not
be needed for longer periods (several months).
■
Before taking the boiler system out of use for a lon-
ger period, we recommend you take certain steps,
e.g. protecting the system against frost or preserving
the heating surfaces.
■
To preserve the heating surfaces, first thoroughly
clean the surfaces on the flue gas side. Then pre-
serve these surfaces with a preserving oil/graphite
mixture.
■
To protect the water side, we recommend flooding
the boiler with degassed, oxygen-free and treated
water with low salt content and added oxygen bind-
ers (e.g. sodium sulphite). Then close the steam
shut-off valve.
Check the concentration of the oxygen binder at
least every month and replenish if required. When
doing this, ensure that the binder is well mixed with
water inside the boiler.
■
Another option is that of dry preservation, which is
recommended for shutdown periods of longer than
4 weeks.
■
When there is a risk of frost, drain the boiler and the
heating system via the drain valve. Open the shut-off
control valve as well as the air vent valves.
Maintenance instructions
We recommend having the boiler system serviced reg-
ularly to ensure fault-free, efficient and environmentally
responsible operation.
The boiler should be cleaned regularly to prevent the
flue gas temperature rising with increasing contamina-
tion, which leads to higher energy consumption.
We recommend the installation of a flue gas thermom-
eter. Monitoring the flue gas temperature highlights
incorrect burner adjustment and the level of boiler con-
tamination.
Excessive flue gas temperatures through contamina-
tion or altered burner adjustment reduce efficiency.
Where necessary, clean the boiler or adjust the burner
settings.
Operating information
Shutting down the system
5692729
Operation
