BWT PRO A - Manual Cell De-scaling; Winterizing; Passive Winterizing; Active Winterizing

2021/03 - Indice de révision : B Code : 29740 TRAITEMENT DE L'EAU
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8.3 Manual de-scaling of the cell
Ifscalebuildsupontheelectrodesovertimedespiteregularinversionofthepolarity,theelectrodesshould
bede-scaledasfollows:
1. Disconnectthecellandgassensorfromthecontrolpanel,
2. Isolatetheby-passlooponwhichthecellismountedbyclosingtheby-passinletandoutletvalves
fully,
3. Unscrewthecellheadandremovetheelectrodesfromthecellbody,
4. Soaktheelectrodesinabucketcontainingdistilledvinegaror10%Hydrochloricacid,
5. Waituntilthescalehasbeencompletelydissolved(bubblingstops),
6. Ifscaleisstillpresent,emptythebucketandaddmorevinegaroracid,
7. Rinsetheelectrodeswithwater,
8. Reassembletheheadofthecellonthebodymakingsurethattheo-ringiscorrectlypositioned.
9. Reconnectthecellandthegassensortothecontrolpanel.
8.4 Winterizing
8.4.1 Passivewinterizing
Intheeventthatltrationisshutdowncompletelyduringwinter,proceedasfollowstoavoiddamagethat
couldbecausedbyfreezingand/orthebuildupofalgae.
Closethe2sectionalvalvesoftheby-passlooponwhichthecellandthepumparemounted.
Peristaltic pump
-Rinsethepumptubestoremoveacidasfollows:
• Carefullyremovetheendofthesuctiontubefromtheacidstoragetankandsubmergeitinabucket
lledwithwater.
• Runthepump.
• Whenatleasthalfofthebuckethasbeenemptied,stopthepump
-Disconnecttheacidsuctiontubefromthepump.
-Carefullydisconnecttheinjectiontubefromthecell,andallowthewaterfromthepumpcircuittoempty
intothebucket.
The cell
Fullypurgetheby-passlooponwhichthecellismounted.
The sensors
-Disconnectthecontrolpanelelectricalsupply.
-Disconnectthesensorsinthecontrolpanel.
-Closethesectionalvalvesontheby-passlooponwhichthesensorsaremounted.
-Removethesensorsandplacethemintheirasksofbuffersolutionasondelivery,storethemina
locationprotectedfromfreezing.
8.4.2 Activewinterizing
Disconnectthecontrolpanelpowersupply.
Equipmentcanbeleftinplacesubjecttotheconditionthatwinterizingchemicalsareaddedtothepool
watertopreventthegrowthofalgae,andltrationrunseveryday.
Filtrationmustnotablyrunwhentheambienttemperatureintheplantroomwherethematerialisinstalled
dropsto+2°Corbelow.