Water Heaters (Calorifiers)
Single wall, vertical design according to manufacturer standards
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with front flange and covers, calorifier made of steel, operating pressure 6 or 10 bar.
Manufacturer standards valid for following operating conditions
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domestic water boiler: operating pressure 6 bar and or 10 bar
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operating temperature: max. 95° C
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Heating coil: max. heating medium temperature 200° C and max. heating medium pressure up to 10 bar
Regarding accessories and acceptance test on the installation place the “AD-leaflet No. A 3” has to be provided.
Material
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For shell, covers and front flange of St 37.2 acc. DIN 17100 with material certificate acc. DIN 50049, section 3B – and section 2 for flanges.
Surface Protection
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inner/outer surfaces are completely hot galvanized or inner/outer surfaces are painted. It is to be checked if the galvanizing or painting can be used as a corrosion protection and at an operating temperature over 60° C. We strongly recommend that an inner plastic coating should be used in such cases.
Testing obligation and pressure testing with water
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Water heater according to the manufacturing standards is to be tested and certified for heating medium temperatures over 110° C. It is an obligation of the national control society that the water heater be tested and controlled acc. to “AD”-leaflets. The testing in the manufacturer´s workshop is carried out by “Technischen Überwachungsverein e.V.”.
In addition to the testing and acceptance stamp of “TÜV” a marking of manufacturer (name, fabrication number and production year) is stamped on the water heater.
With this mark it is ensured that the water heater is manufactured according to standards. Water heater with 6 and 10 bar operating pressure is tested with 8 and 13 bars. The same water heater is delivered to the non-tested water boiler plants.
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