Vacon NX, Руководство пользователя

Страница: 57 / 239

Installation vacon • 55
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
5
Notes:
1) No aggressive water allowed.
2) To avoid corrosion of piping, the sulphate content must not exceed 150 mg/l.
The cleanness of the heat exchanger, and therefore the heat exchanging capacity, depend on the
purity of the process water. The more impure the water, the more frequently the heat exchanger
needs cleaning. The following figures are reference values required of cooling circuit process water:
Table 17. Drinking water quality recommendations
Quality Unit Max. value
Aluminium μg/l 200
Ammonium (NH
4
+
)
mg/l 0.50
Ammonium (NH
4
-N)
mg/l 0.40
Chloride
1]
mg/l <100
Manganese μg/l 50
Iron μg/l <0.5
Sulphate
1] 2]
mg/l 250
Sodium mg/l 200
Oxidizability
(COD
Mn
-O
2
)
mg/l 5.0
Quality Unit Desired value
Clostridium perfringens
(including spores)
pmy/100 ml 0
Coliform bacteria pmy/100 ml 0
Bacterial count (22 °C) No unusual changes
pH
1]
pH 6…8
Electrical conductivity
1]
μS/cm <100
Turbidity
To be approved by user and
no unusual changes
Colour No unusual changes
Smell and taste No unusual changes
Total organic carbon (TOC) No unusual changes
Tritium beq/l 100
Indicative total dose mSv/year 0.10
Water hardness °dH 3...10
Max. particle size in coolant μm 300