Gorenje HPWW12, Instructions For Installation And Start-Up, Page: 63 / 64

Water-to-water Heat Pump
63
VALUATION OD
CHARACTERISTICS CONCENTRATION IN
THE AMBIENT (mg/l) COPPER LEAD>13°C
Generated substances
(organic) 0 0
Ammonia
NH3 < 2
2 to 20
> 20 +
0
- +
+
0
Chloride < 300
> 300 +
0 +
0
Electric conductivity < 10 µ S/cm
10 to 500 µ S/cm
>500 µ S/cm 0
+
- 0
+
0
Iron (Fe), dissolved < 0,2
> 0,2 +
0 +
0
Free (agressive) carbonic
acids <5
5 to 20
> 20 +
0
- +
+
0
Manganese (Mn), dissolved < 0,1
> 0,1 +
0 +
0
Nitrate (NO
3
), dissolved < 100
> 100 +
0 +
+
PH value < 7,5
7,5 to 9
> 9 0
+
0 0
+
+
Oxygene
< 2
> 2 +
0 +
+
Hydrogene sulfide (H2S) < 0,05
> 0,05 +
- +
0
HCO3- / SO42-
< 1
> 1 0
+ 0
+
Hydrogen carbonate (HCO3-)
<70
70 to 300
> 300 0
+
0 +
+
0
Alumminium (Al), dissolved < 0,2
> 0,2 +
0 +
+
Sulfate Up to 70
70 to 300
> 300 +
0
- +
+
0
Sulfite (SO3), free < 1 + +
Chlorine gas (Cl2) < 1
1 to 5
> 5 +
0
- +
+
0
Resistance of copper plates welded with steel plates in the heat exchanger depends on contents of
substances in water + standard good resistance
0 Problems with corrosion may appear, especiall when more factors have value 0 – should not be
used [< lower than, > higher than]