III ShortoperatinginstructionsTWA6
1.Filling the rawwaterpumpwithrawwaterand installation ofarawwatertankincl.
all suction and deliveryhoses.
2.Preparethe required chemicalsforthe TWA6per8m3tank.
2.1Dissolvechlorine acc. Tothe corresponding dosing plan inapprox. 10 litresofwater
and fill intothe tankwiththe first water.
2.2Keep the reaction time.Then dissolveferricchloride acc.tothe dosing plan in
approx. 10 litresof waterand add intothe tank. Keep the reaction time.
3.Inthe meantime,install the otherrawwatertanks and startwithfilling and addition
of chemicalsasdescribed inpoint 2.
4.Addition ofactivated carbon acc.tothe dosing plan (inapprox.10 litresofwater),
stirwell, keep the reaction time.
5.AfterpH-measuring,adjustthe pH-value byaddition oflime(inapprox.10 ltrs.of
water), keep the reaction timeand allowsettling forabout 20 -30 min.
5.1Aftereachaddition of chemicalsone hastostirvigorouslyforabout 5min.
6.Installation of the precoat pump:
6.1Prepare2kgBerkesil KE withabout 10 ltrs. of treated waterfromthe first rawwater
tank(distributed totwoprecoatbuckets,additionallyprovide anotherbucketof
waterforrinsing).
6.2Deaeratethe precoatpumpviarawwatercollector,4-waysuction valveand
precoat hose, precoat (approx. 4-5m3/h; throttleslide valve).
6.33-waytap ison position “Filtration“.Onlyswitchoverto“Circulation“ifthe water
drainsoff the purewateroutflow.
6.4Operate“Circulation“forabout5-7min.Then switchovertofiltration.Rinsethe
hosepipesincl. the waterinflowpipe withpurewaterforabout 30 sec.
6.5Then switchto“Circulation“and hang the purewaterinflowpipe intothe covered
purewatertankand install the chlorine dosator.Nowswitchto“Filtration“again
and operatethe plant withmax. 6m3/h.
7.Preparechlorine forthe chlorine dosatorasfollows:
Mixapprox.90 gHTHchlorine withapprox.9ltrs.ofwater,stirwell and fill this
solution intothe chlorine dosator,deaerateand adjusttocapacity(l/h=1mgCl2/l).
Adjust withneedlevalvebelowthe flowmeter.
8.If the precoatfilterreached adifferentialpressureofapprox.3bar(difference
between the manometersbeing installed beforeand afterthe flowratemeter),the
plant hastobe backwashed asfollows:
9.The backwashofthe precoatfilterhastobe carried outwiththe purewaterpump
and the purewaterviathe connection “purewater".Quenchforaboutsixtimes
(about three timespertank), then precoat againviarawwater.
