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13.2.5 Warm water (ZWN)
Bij onvoldoende uitstroomdebiet:
Demonteer de platenwarmtewisselaar en vervang hem,
- of -
Ontkalk met een ontkalkingmiddel dat geschikt is voor roestvrij
staal. (af te raden)
Fig. 61
13.2.6 Expansievat
Maak de ketel drukloos.
Verhoog, indien nodig, de tegendruk van het expansievat tot de statische hoogte van de verwarmingsinstallatie.
13.2.7 Vuldruk van de verwarmingsinstallatie
i
Voor het bijvullen de slang met water vullen. Zodoende komt er geen lucht in het verwarmingswater.
De manometer moet tussen 1 en 2 bar staan.
Als de manometer minder dan 1 bar aanduidt (bij koude installatie), water bijvullen tot de manometer terug tussen 1
en 2 bar staat.
De maximale druk van 3 bar (bij installatie op de hoogste temperatuur) mag niet overschreden worden
(veiligheidsventiel opent).
Indien de druk niet behouden blijft, dienen het expansievat en de verwarmingsinstallatie op dichtheid te worden
gecontroleerd.
13.3 Wisselstukken en smeermiddelen
Gebruik uitsluitend originele JUNKERS-wisselstukken en JUNKERS-vet.
Voor metalen dichtvlakken, O-ringen en temperatuurvoelers:
- in contact met water
- in contact met gas
- warmtegeleidingvet
L 641,
HFT 1 V 5,
P 12.
34


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