Metasys WEK - Functional Description

Product description | EN
11
4.5. Functional description
Afteropeningthetapandswitchingonthedevice,thedosingvalveisopenedand150mlofwaterisaddedtothemixingcontainer.
ThewaterlevelinthemixingcontainerismonitoredbyanelectroniclevelprobeA.Ifthecontactonthisprobeistriggered,magneticvalves2(compressedair)
and1(GREEN&CLEANWK)open.Asaresult,thecompressedair-operateddoublemembranepumpdrawsapprox.1.75mlofhydrogenperoxidefromthe
GREEN&CLEAN WK bottle and adds it to the mixing container.
IfthewaterleveldropsbelowlevelprobeA,thedosingvalveopensagainuntiloverowprobeBisreached.Whenthisprobeisreached,300mlofwaterhasnow
beenaddedtothemixingcontainer.Magneticvalves2and1nowopenagainandaddadditional1.75mlofGREEN&CLEANWKtothemixingcontainer.This
ensures that the required concentration of disinfectant solution is continuously maintained.
Thewaterinletinthemixingtankisdesignedasafreefallsection,whichensuresthattheWEKisseparatedfromthewatersupplynetworkasrequiredbyDVGW
(DIN1988,Part4).AbackowofcontaminatedwaterorwatermixedwithGREEN&CLEANWKtothesupplynetworkisthereforenolongerpossible.
Ifaconsumerisactivated,theconsumptionmediumowsfromthemixingtankviathepressuretanktothecorrespondingconsumers.
Thislowersthewaterlevelinthepressuretankandconsequentlythewaterpressure.Themembranepumpisstartedbymeansofapressureswitchattachedto
thepressuretankandsetto2.5bar.Thismembranepumpisresponsibleforemptyingthemixingtankorllingthepressuretankandformaintainingthenecessary
owpressure.
Anaircushioninthepressuretankcompensatesforthewaterlevel.Ifnecessary,theaircushionisbalancedwithcompressedair(magneticvalve3)-allthisto
ensureastablewaterjetfortheconsumers.Theaircushionprobeensuresthattheairpressureremainsconstant.
ThedisinfectantisdrawnfromtheGREEN&CLEANWKbottle.AdisinfectantsensormonitorsthepresenceofGREEN&CLEANWK.Ifnomoredisinfectantcan
bedelivered(e.g.becausethedisinfectantbottleisempty),anerrormessageisshown.
Please note that only GREEN&CLEAN WK may be used, as the electronic sensor system is matched to it!
Disinfectant concentrate
Magnetic valve 1
(chemical)
Chemical sensor
Double
membrane
pump
Flowratelimiter
Dosing valve
Magnetic valve 2
Compressed air
supply
Pressure regulator
Water supply
Membrane pump
Pressureswitch
2 x 150 ml
Mixingtankwithfree
overow
DVGW cascade
Filllevelandoverowprobe
A and B
Overow
Non-return valve
Air cushion probe
Non-return valve
To the
consumers
Pressure
tank
Water
Disinfectant concentrate
Disinfectedwater Compressed air
Magnetic valve 3