Heating Systems With Plastic Pipes - Atag iR 12 Installation & Servicing Instructions Manual

Parameter
Water type
pH
Conductivity (at 20°C in µS/cm)
Iron (ppm)
Hardness (°dH / ppm):
Oxygen
Corrosion inhibitors
pH increasing or lowering agents
Anti-freeze additives
Other chemical additives
Solid substances
Residues of processing water not forming part of the
drinking water
Water type definition:
Potable water:
Softened water: Water with partly de-ionised calcium and magnesium.
Demi-water:
Distilled water:
9.3

Heating systems with plastic pipes

When connecting or using an underfloor heating system, designed with plastic pipes, or plastic pipes are
used elsewhere in the installation, one should ensure that the plastic pipes used comply with the DIN
4726/4729 standard. It is set out in this standard that the pipes may not have oxygen permeability higher
than 0.1 g/m³.d at 40°C. If the system does not comply with this DIN standard, the underfloor heating
component will have to be separated from the central heating appliance by means of a plate exchanger.
No recourse can be made to the terms of the warranty in the event of failure to observe the
regulations pertaining to plastic underfloor heating pipes.
Installation & Servicing instructions ATAG iR-Range
Installation volume/capacity
Installation volume/capacity
Tap water compliant with the European drinking water guideline:
98/83/EG dated 3 November 1998.
Virtually completely demineralised water (very low conductivity)
Water no longer containing minerals.
Value
Potable water
Softened water
6.0-8.5
Max. 2500
Max. 0.2
1-12 °dH / 17-214 ppm
<20 l/kW
1-7 °dH / 17-125 ppm
>=20 l/kW
No oxygen diffusion allowed during operation.
Max. 5% filling water addition annually
Refer to Additives Attachment
Refer to Additives Attachment
Refer to Additives Attachment
Refer to Additives Attachment
Not allowed
Not allowed
table 9.2.a
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