Commissioning
6 720 808 928 (2017/06)
41
6.9.2
Domestic hot water for copper brazed plate heat
exchangers
[+]
Good resistance under normal conditions
[o]
Corrosion problem possible
[-]
Use is not recommended
Water containing
Concentration
(mg/l or ppm) AISI 316 Copper
Alkalinity (HCO
3
)
<70
+
o
70-300
+
+
>300
+
o/+
Sulfate (SO
4
2
)
<70
+
+
70-300
+
o/-
>300
+
-
HCO
3
/SO
4
2
>1
+
+
<1
+
o/-
Electrolytic conductivity
(μS/cm)
<10
+
o
10-500
+
+
>500
+
o
pH
<6.0
o
o
6.0-7.5
+
o
7.5-9.0
+
+
>9
+
o
Ammonia (NH
3
)
<2
+
+
2-20
+
o
>20
+
o
Chlorides (Cl)
<300
+
+
>300
-
o/+
Free Chlorides (Cl
2
)
<1
+
+
1-5
-
o
>5
-
o/-
Hydrogen sulfide (H
2
S)
<0.05
+
+
>0.05
+
o/-
Free (aggressive) carbon
dioxide (CO
2
)
<5
+
+
5-20
+
o
>20
+
-
Total hardness (°dH)
<4
+
-
4-20
+
+
20-30
+
o
>30
+
-
Nitrate (NO
3
)
<100
+
+
>100
+
o
Iron (Fe)
<0.2
+
+
>0.2
+
o
Aluminium (Al)
<0.2
+
+
>0.2
+
o
Manganese (Mn)
<0.1
+
+
>0.1
+
o
Table 30
Содержание Worcester Greenstar HIU
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