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8 716 833 195 (2013/06 BL-NL) (T30.33195.10)
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6. WERKING
6.1 Concept van de warmtewisselaars
De ketel is uitgerust met twee warmtewisselaars die een hoog prestatieniveau mogelijk maken:
-
Een primaire warmtewisselaar in aluminium-silicium, uit één stuk, zonder lasnaden noch koppelingen. Dus zonder
risico op lekken.
-
Een secundaire warmtewisselaar in geëmailleerd staal, die de primaire warmtewisselaar omsluit.
Hij koelt de branderkamer, vermijdt warmteverliezen door straling langs de zijkanten van de ketel en koelt tevens
de rookgassen.
De combinatie van beide warmtewisselaars maakt een rookgastemperatuur van minder dan 130°C mogelijk.
6.2 Werkingsschema
thermostaat
ontsteking
élektromagneet
gas 1 en 2
vlam
controlelampje
Fig. 7
t0 tot t6
normale werking
t4 tot t9
geen ontstekingsvlam
Tw
wachttijd (= 10 seconden)
Ts
vergrendelingstijd bij gebrek aan een ontstekingsvlam (maximum 4 seconden)
Tpr
voorontstekingstijd
Tpo
na-ontstekingstijd
De twee branders van het toestel EHLE 78 werken simultaan.
De twee schakelkasten worden vanuit één centraal bedieningspaneel gestuurd.
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