Safety
Design Information
Fröling Heizkessel- und Behälterbau Ges.m.b.H, Industriestraße 12, A-4710 Grieskirchen, Austria Page 11
Tel +43 (0) 7248 606-0 Fax +43 (0) 7248 606-600 info@froeling.com www.froeling.com
B0190806
Rule of thumb:
Provide a supply air cross-section of 2 cm
2
per kW of boiler rated output,
as per ÖNORM H 5170, but a total cross-section of at least 200 cm
2
2.3.4 Heating System Installation/ Standards
The following standards govern the installation of heating systems:
Applicable standards:
ÖNORM / DIN EN 12828 Heating Systems in Buildings
The following prior standards still apply:
Austria: - Closed systems as per ÖNORM B 8131
- open systems as per ÖNORM B 8130
Germany: - closed systems as per DIN 4751 Part 2
- open systems as per DIN 4751 Part 1
A storage tank with the proper dimensions will guarantee the best boiler
operating values during the entire heating period.
Return feed lift
If the heated water return feed is under the minimum return
temperature, a portion of the heated water outfeed will be mixed in.
Below dew point / condensation forms during operation without
return feed lift!
Condensation water and fuel residue combine to form an aggressive
condensate, leading to damage to the boiler!
Regulations demand the use of a return feed lift!
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