Unless otherwise specified in the applicable building regulations for the boiler room,
the following standards apply to the design and dimensions of the air ducts:
ÖNORM H 5170 - Construction and fire protection requirements
2.4.4 Requirements for central heating water
The following standards and guidelines apply:
Austria:
Germany:
Switzerland:
Italy:
ÖNORM H 5195-1
VDI 2035
SWKI 97-1
D.P.R. no. 412
NOTICE! Note on filling with make-up water: Always bleed the filling hose before con‐
necting, in order to prevent air from entering the system.
Observe the standards and also follow the recommendations below:
❒ Max. cumulative value for alkaline earth: 1.0 mmol/l or 100 mg/l (corresponds to
5.6 dH)
❒ Use softened water as the make-up water
❒ Avoid leaks and use a closed heating system to maintain water quality during op‐
eration
Note on standards
Note on standards
Safety
2
Design Information
Installation Instructions S3 Turbo | M1080813_en
9
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