Water Quality And Water Treatment; Process Heat Application; Increase Default Δt Setting - DeDietrich EVODENS PRO Series Installation And User Manual

4 Preparation of installation
4.8

Water quality and water treatment

4.9

Process heat application

4.10 Increase default ΔT setting
24 AMC Pro
Condensation
Direct connection of the flue gas outlet to structural ducts is not
permitted because of condensation.
If condensate from a plastic or stainless steel pipe section can flow back
to an aluminium part in the flue gas outlet, this condensate must be
discharged via a collector before it reaches the aluminium.
Newly installed aluminium flue gas pipes with longer lengths can
produce relatively larger quantities of corrosion products. Check and
clean the siphon more often in this case.
Important
Contact us for more information.
The quality of the CH water must comply with certain limit values, which
can be found in our Water quality instructions. The guidelines in these
instructions must be followed at all times.
In many cases, the boiler and central heating system can be filled with
normal tap water and water treatment will not be necessary.
In process heat applications (for example pasteurisation and drying and
washing processes), the boiler is being used for industrial purposes and
not for central heating. With process heat, the nominal flow (at ΔT 20°C) in
the primary CH circuit must be guaranteed. The flow in the secondary
circuit may vary.
To ensure that this is the case, a flow rate sensor can be fitted, which
locks out the boiler if the flow falls below a specified level (due to a
defective pump or valve, for example).
Important
The service life of the boiler may be reduced if it is used for
process heat applications.
For more information, see
Setting for process heat application, page 60
In some cases, the default ΔT setting of the boiler will need to be
increased, for example in systems with:
underfloor heating
air heating
district heating
a heat pump.
Important
Prevent the boiler from locking out and ensure a minimal water
circulation by using a bypass or low-loss header.
For more information, see
Changing the default ΔT setting, page 61
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