CompAir D110H RS, Operating And Service Manual

Page: 30 / 64

6. Preparations for commissioning
28
Note
Wherever possible, the cooling-water outlet
temperature should be below 50 °C, in order to prevent
excessive precipitation of limestone fur.
Fig. 13
1 Water inlet
2 Water outlet
3 Compressed-air connection
6.3.1 Limit values of the constituent
elements in water
Note
The information set out below is intended for guidance
and may differ under certain conditions of operation.
The total composition and the operating temperature
are always decisive. Warranty claims may not be
derived from this..
Constituent elements of
water / characteristic
values
Circulating
water
Pass-
through
water
pH value
(at 25 °C / 77 °F)
6 – 9 6 – 9
Carbonate
hardness CaCO
3
< 100 mg/l
(5.6 °dH)
< 50 mg/l
(2.8 °dH)
Total hardness
< 2 mmol/l
< 200 ppm
< 11.5 °dH
< 20 °fH
< 0.5 mmol/l
< 50 ppm
< 2.8 °dH
< 5 °fH
Chloride Cl
-
< 200 mg/l < 50 mg/l
Sulphate SO
4
2-
< 200 mg/l < 50 mg/l
Nitrate NO
3
−
< 100 mg/l < 100 mg/l
Organic substances
(KMnO
4
absorption)
< 25 mg/l < 10 mg/l
free aggressive
carbonic acid
CO
2
< 20 mg/l < 20 mg/l
Silicium oxide SiO
2
< 10 mg/l < 10 mg/l
free chloride Cl
2
< 4 mg/l < 2 mg/l
Oxygen O
2
< 2 mg/l < 2 mg/l
Ammonium NH
4
+
< 1mg/l < 1mg/l
Iron Fe < 0.2 mg/l < 0.2 mg/l
Manganese Mn <0.1 mg/l <0.1 mg/l
Sulphide S
2-
0 0
Ammoniac NH
3
0 0
Conductivity
> 50. < 800
µ S/cm
> 50. < 200
µ S/cm