NA 041
DIN Standards Committee Heating and Ventilation Technology and their Safety
Technical rule
[CURRENT]
AGFW FW 503
AGFW FW 503
Requirements and hints for installation of self-operated temperature regulators and limiters for heating water and steam
Title (German)
Anforderungen und Einbauhinweise für Temperaturregel- und -begrenzungseinrichtungen ohne Hilfsenergie für Heizwasser und Dampf