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38 | Inspectie en onderhoud
CerapurCompact6720859429 (2016/04)
15.8 ZWB...DE-ketels: platenwarmtewisselaar controle-
ren
Bij onvoldoende warmwatervermogen:
Controleer filter in koudwaterleiding op vervuiling (
hoofdstuk 15.7).
Ontkalk de platenwarmtewisselaar met een voor roestvrij staal
(1.4401) vrijgegeven ontkalkingsmiddel.
-of-
Demonteer de platenwarmtewisselaar en vervang deze.
1. Schroef verwijderen.
2. Neem de platenwarmtewisselaar uit.
Afb. 56 Platenwarmtewisselaar demonteren
15.9 Expansievat controleren
Controleer het expansievat jaarlijks.
Ketel drukloos maken.
Breng eventueel de voordruk van het expansievat op de statische
hoogte van de cv-installatie ( hoofdstuk 5.3, pagina 21).
15.10 Bedrijfsdruk van de cv-installatie instellen
Tabel 25
Wanneer de wijzer onder 1 bar staat (bij koude installatie):
Vul water bij, tot de wijzer tussen 1 en 2 bar staat.
Wanneer de druk niet wordt vastgehouden:
Controleer het expansievat en de cv-installatie op dichtheid.
15.11 Automatische ontluchter demonteren
1. Klem verwijderen.
2. Automatische ontluchter uittrekken.
Afb. 57 Automatische ontluchter demonteren
15.12 Gasblok controleren
Stekker (24 V) op het gasblok lostrekken.
Weerstand van magneetventiel [1] en [2] meten.
Afb. 58 Meetpunten op het gasblok
[1] Meetpunten magneetventiel 1 (3-4)
[2] Meetpunten magneetventiel 2 (1-3)
Wanneer de weerstand bij 0 of ligt, gasblok vervangen.
Aanwijzing op manometer
1 bar Minimale vuldruk (bij koude installatie)
1 - 2 bar Optimale vuldruk
3 bar Maximale vuldruk bij de hoogste temperatuur van het
cv-water mag niet worden overschreden (overstort-
ventiel opent).
0 010 005 834-001
1.
2.
2.
1.
0 010 006 638-002
0 010 005 836-
0
01
2
1
1
2 3 4
38


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