•
If protective agents are used, compliance must be ensured with the permissible
concentration range in heating water.
Type of protective agent
Permissible concentration [mg]
Phosphate P2O5
5 - 30
Polysilicates, SiO2
20 - 60
Polysilicates,
10 - 50
Sulphide denoted as SO3
10 - 30
Molybdate denoted as MoO4
150 - 500
Germany – VDI 2035, published 10/2009
Sheet 1 — Scale formation in DHW and hot water heating systems.
Sheet 2 — Water-side corrosion in DHW and hot water heating systems.
4.2
Manufacturer's Guidelines
Compliance with the manufacturer's guidelines ensures that your system is an
example of state-of-the-art technology and also secures your warranty entitle-
ments.
In all work, you must observe the current applicable legal requirements and the rele-
vant safety regulations:
•
for Austria: ÖNORM, EN, ÖVGW-TRF and ÖVE
•
for Germany: DIN, EN, DVGW, TRGI, TRF and VDE
•
for Switzerland: SEV, SUVA, SVGW, SVTI, SWKI and VKF
You must also observe the connection requirements for the domestic hot water sup-
ply equipment and instructions for the heat generator.
8
4 Requirements for an accumulator
Installation manual
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