Regudis W-HTE
Appendix
5
Special advice regarding corrosion protection
NOTICE
High fluid temperatures (>60 °C) increase the risk of corrosion
f
Do not set the hot water temperature and the flow temperature of the heating water higher than necessary.
NOTICE
Long stagnation periods increase the risk of corrosion
f
Flush the installation manually or automatically at regular intervals if longer stagnation periods are to be expected
continually (VDI/DVGW 6023).
• Be careful in case of hydrogen carbonate/chloride combinations.
Low hydrogen carbonate contents combined with high chloride
contents increase the risk of corrosion.
• Be careful in case of hydrogen carbonate/sulphate combinations
. When using copper brazed heat exchangers, the hydrogen
carbonate content in the water must not be lower than the sulphate content.
If this is the case, a nickel brazed, stainless steel
brazed or a heat exchanger with protective layer has to be used.
• If the substances in the water are outside the indicated limit values, a
water treatment system
has to be installed, if required.
NOTICE
An incorrectly operated water treatment system may increase the risk of corrosion!
•
In case of mixed installations, the "flow rule" must be observed when using copper brazed heat exchangers in combination
with galvanised steel pipes.
More detailed information can be obtained from the DIN EN 12502 standard.
•
Flush
all
supply pipes
before
installation
of the station (DIN EN 806-4), to remove any dirt particles and residues from the system
.
• During
maintenance work
on the station, please consider that even
detergents
may encourage corrosion of the heat exchanger
.
In this context, observe the DVGW specifications, such as the work sheets W291 and W319.
• When using a copper brazed heat exchanger without protective layer, the electrical conductivity of the water lies between 50
and 500 µS/cm
. Bear this in mind particularly in the context of water treatment according to VDI2035.
Premissible chloride content depending on the temperature
High risk of corrosion
Temperature (°C)
A heat exchanger with Sealix® protective layer minimises the risk of corrosion even in case of higher temperatures and chloride
contents. Refer to the table “Demands on the water quality” for the respective limit values.
NOTICE
Corrosion and formation of stones in the system
f
The specifying engineer and the user of the system are responsible for incorporating and evaluating substances and other
factors in the water, which could influence corrosion and the formation of stones in the system. In critical water supply are
-
as, the local water authority should be consulted.
OVENTROP GmbH & Co. KG
Paul-Oventrop-Straße 1
D-59939 Olsberg
Phone
+49 (0) 29 62 82-0
Fax +49 (0) 29 62 82-400
E-Mail
Internet
www.oventrop.com
134103144
V06.09.2020
63
134403082-V09.03.2022
Summary of Contents for Regudis W-HTE
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