Installation and Service Manual Upsilon-Series
18
- On installation and during additions or changes at a later stage, A.O.Smith recom-
mends to keep a record of the type of water used, its quality at the time, and if ap-
plicable, which additives and quantities were added.
Parameter
Value
Water type
Potable water
Softened water
pH
6.0-8.5
Conductivity (at 20°C in µS/cm)
Max. 2500
Iron (ppm)
Max. 0.2
Hardness (°dH):
Installation volume/capacity
<20 l/kW
1-12
Installation volume/capacity
>=20 l/kW
1-7
Oxygen
No oxygen diffusion allowed during
operation.
Max. 5% filling water addition annually
Corrosion inhibitors
Refer to Additives Attachment
pH increasing or lowering agents
Refer to Additives Attachment
Anti-freeze additives
Refer to Additives Attachment
Other chemical additives
Refer to Additives Attachment
Solid substances
Not allowed
Residues of processing water not for-
ming part of the drinking water
Not allowed
table 6.3.a
Water type definition:
Potable water:
Tap water compliant with the European drinking water guideline:
98/83/EG dated 3 November 1998.
Softened water: Water with partly de-ionised calcium and magnesium.
Demi-water:
Virtually completely demineralised water (very low conductivity)
Distilled water:
Water no longer containing minerals.
