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5 Before installation
28
Caution
Warranty claims are excluded if the specified measures or
required values are not adhered to or if documentation is missing.
5.5.1
Addition of a product to treat the heating water
Caution
Use only approved products or methods which have the following
properties:
Hardness stabilisers prevent the precipitation of hardness.
Cleaning products dissolve dirt in the circuit and may also keep
the dissolved dirt suspended.
Corrosion protection products form a protective layer on metallic
surfaces.
Full protection products prevent the precipitation of hardness,
have a cleaning effect, keep the dissolved dirt in suspension
(dispersion) and form a corrosion protection layer on metallic
surfaces.
Only products approved by Potterton may be used to treat heating water.
Softening/desalination may only be carried out using appliances approved
by Potterton, while taking the limit values into consideration.
Caution
If non-approved agents are used, no warranty rights or guarantees
are valid.
The following products are currently approved by Potterton:
"Full heating protection" from Fernox (www.fernox.com)
„Sentinel X100" from Sentinel (www.sentinelprotects.com)
If products are used, the manufacturer specifications must be observed. If
it is necessary to use additives as part of a mixture in special cases, e.g.
hardness stabiliser, antifreeze agent, sealant, etc., you must ensure that
the agents are compatible with each other and that the required pH in the
circuit continues to be adhered to. Preferably, agents from the same
manufacturer should be used.
Ensure that the electrical conductivity of the fill water corresponds to the
manufacturer specifications for the relevant dosing rate, with the
addition of an inhibitor.
The electrical conductivity in the circuit must not rise significantly (+ 100
μS/cm), even after a prolonged running time, without the dose having
been increased.
The pH of the circuit water must be between 8.2 and 9.0 during
operation.
The pH, electrical conductivity and product content of the heating water
must be checked after eight weeks of operation and then once per year.
The measured values must be documented in the service book.
5.5.2
Softening/partial softening
Use of a softening system to treat the fill water and to prevent damage
caused by the formation of scale in the boiler.
Partially softened fill water according to the table from VDI 2035 Sheet 1
can generally be used.
VDI 2035 Sheet 2 must be observed.
The pH of the circuit water must be between 8.2 and 9.0 during
operation.
Automatic alkalisation of the system water (pH increase caused by
carbon dioxide outgassing) begins under various conditions.
The pH, electrical conductivity and °dH of the circuit water must be
checked after eight weeks of operation and then once per year.
Document the measured values in the service book.
7703301 - 01 - 16072018
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