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Inspectie en onderhoud
Logamax plus GB172-..T... - Wijzigingen op grond van technische verbeteringen voorbehouden.
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15.5 Membraan (rookgasterugstroombe-
veiliging) in de menginrichting con-
troleren
B Demonteer de menginrichting conform afb. 109.
B Controleer het membraan op vervuiling en scheuren.
Afb. 116
B Monteer de menginrichting weer.
15.6 Controleer het expansievat (toebe-
horen) (zie ook pagina 40)
Het expansievat moet conform DIN 4807, deel 2, par. 3.5
jaarlijks worden gecontroleerd.
B Ketel drukloos maken.
B Breng eventueel de voordruk van het expansievat op
de statische hoogte van de cv-installatie.
15.7 Bedrijfsdruk van de cv-installatie in-
stellen
B Wanneer de wijzer onder 1 bar staat (bij koude instal-
latie): water bijvullen, tot de wijzer weer tussen 1 en
2 bar staat.
B Wanneer de druk niet wordt aangehouden: expansie-
vat en cv-installatie op dichtheid controleren.
6 720 615 492-18.2O
OPMERKING: Schade aan de ketel!
Bij het bijvullen van cv-water kunnen span-
ningsscheuren in het hete ketelblok ontstaan.
B Vul cv-water alleen bij in een koude ketel.
Aanwijzing op manometer
1 bar Minimale vuldruk (bij koude installatie)
1 - 2 bar Optimale vuldruk
3 bar Maximale werkingsdruk van het cv-water
(mag bij de hoogste temperatuur niet
overschreden worden, zoniet opent de
veiligheidsklep).
Tabel 24
Voor het navullen de slang met water vullen.
Daardoor wordt voorkomen, dat lucht in het
cv-water terecht komt.
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