Installation & Servicing instructions
AT
AG XL
18
- Chemical additions are to be avoided and should only be used after ATAG HEATING
has approved their corresponding use.
- Should you wish to achieve the required water quality by using chemical additives,
then this is your own responsibility. The warranty on the product delivered by ATAG
expires, if the water quality does not meet ATAG´s specifications or the chemical ad
-
ditives have not been approved by ATAG.
- On installation and during additions or changes at a later stage, ATAG recommends
to keep a record of the type of water used, its quality at the time, and if applicable,
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.
