Pressure Loss; Corrosion Protection - OEG SecuFresh 22 Montage- Und Bedienungsanleitung

20
3.3

Pressure loss /

Pump characteristic
3.4

Corrosion protection

GB
. . .
To prevent corrosion damage to plate heat exchangers, the following drinking water
values must be observed:
Permissible values for drinking water in conjunction with stainless steel plate heat
exchangers [SS / . ].
-
Chloride (CL )
Sulphate (SO - )
Nitrate (NO -)
pH value
Electrical conductivity (at
Hydrogen carbonate (HCO
- -
Ratio HCO / SO
+
Ammonia (NH )
Free chlorine gas
Sulphite
Hydrogen sulphide (H S)
Free (aggressive) carbon dioxide (CO )
Iron (Fe)
Ammonium
Manganese (Mn)
Overall hardness °dH
Total organic carbon (TOC)
If the limit values for copper-soldered plate heat exchangers are exceeded, a solid
stainless steel plate heat exchanger must be used. To prevent pitting corrosion in the
domestic installation, no new galvanised iron material must be installed downstream in
the hot water pipe of the copper-soldered plate heat exchanger without forming a
protective layer. Solid stainless steel plate heat exchangers must be used in mixed
installations with zinccoated iron materials.
. . .
Copper-soldered
< mg/l bei +
< mg/l bei +
< mg/l bei +
< mg/l
< mg/l
. - .
°C) - µS/cm
- ) - mg/l
Verhältnis > ,
< mg/l
< . mg/l
< . mg/l
< mg/l
< . mg/l
< . mg/l
- (ratio [Ca,Mg] / [HCO ] < . )
< mg/l
SecuFresh
.
.
.
. Wilo Para /
.
.
SecuFresh
.
.
. ,
[m /h]
Solid stainless steel
°C
°C
°C
< mg/l
No requirement
. - .
No requirement
No requirement g/l
No requirement .
No requirement
< mg/l < mg/l
No requirement
No requirement
No requirement
< mg/l
No requirement
No requirement
Fresh water station