Hayward DEX2420MAR2 User Manual

HAYWARDPOOLPRODUCTS,INC.620DivisionSt.,Elizabeth,NJ07207TEL:9083515400 WWW.HAYWARDPOOL.COM
Instructio nsforDEX2420MAR2ManualAirReliefValve ISDE2420MAR2
READ,UNDERSTANDANDFOLLOWALLSAFETYANDOPERATION
INSTRUCTI ONS
PRESSUREHAZARD
Poolandspawatercirculationsystemsoperateunder
hazardouspressureduringstartup,normaloperation,andafter
pumpshutoff.
· Standclearoffilterduringpumps tartup.
· Failuretofollowsafetyandoperationinstructionscouldresult
inviolentseparationoftheupperfilterbodyand/ormanualair
reliefvalveassembly duetopressureinsystem,whichcould
causepropertydamage,severepersonalinjuryordeat h.
STEPSTOPREVENTEXCESSIVEPRESSUREBUILDUPIN
SYSTEM
· Beforeservicingpoolandspawatercirc ulationsystemall
systemandpumpcontrolsmustbeinoffpositionandfilter
manualairreliefvalvem ustbeinopenposition.
· Beforestartingsys tempumpallsystemvalvesmustbesetina
positiontoallowsyst emwatertoreturnbacktothepool.Do
notchangefiltercontrolvalvepositionwhilesystempumpis
running.
· Beforestartingsys tempumpfullyopenfiltermanualair relief
valve,donotclosemanualairreliefvalveuntilasteadystream
ofwater(notair orairandwater)isdischarged.
FILTERCOMPONENT
SEPARATIONHAZARD
Failuretofollowsafety andoperationinstructionscouldresult
inviolentseparationoffi ltercomponents.
· Upperandlowerfilterbodiesmustbeproperlysecuredwith
filterbodyclamp.
· Beforeservicingpoolandspacirculationsystem,manualair
reliefvalvemustbeinopenposition.Donotoperatepooland
spacirculationsystemifasystemcomponentisnotassembled
properly,damagedormissing.
· Donotoperatepoolandspacirculationsystemunlessfilterair
reliefvalvebodyisinlocked“LOCK”positioninfilterupper
body.
Instructio ns
REMOVINGTHEMANUALAIRRELIEFVALVE
YourFiltercomeswiththeManualAirReliefValve(MAR)pre
installedfromthefactory.Onlyqualifiedpool professionals
shouldserviceyourfilter’sManualAirReliefValve.For
Qualifiedpoolprofessionalsonly:IffilterMARvalveneedsto
bereinstalled,followthisinstructioncarefully.
1. ShutoffPump
2. OpenMARValvetoopenpositi ontorelievepress ure.
3. GrasptheMARbodyattheflats,turntheMAR
counterclockwise(asthearrowindicated)untilthenotchonthe
ontheMARflangeisalignedwit hthe“UNLOCK”positionas
shownonthefilterhead.
4. PullouttheMARcarefully.
REINSTALLATION
1. AlignthenotchintheMARFlangewithnotchontheMARpart
ofthefilterh ead.
2. TurntheMARclockwise( asthearrowindic ates)untilthenotch
isalignedwiththe“LOCK”positionasshownonthefilt erhead.
3. Closefilterdrain.
4. Openallsystemvalvest oallowwaterflowfromfiltertopool
andpoolt opump/filtersystempriortostartingsystem.
5. Openfiltermanualairreliefvalvetofullopenpositiontoallow
airevacuationf romfilterduringsystemstartup.
6. StandClearofsystemduringsystemstartup.
7. Closefiltermanual airreliefvalvewhenasteadystreamof
water,notairandwatermix,isdischargedfromfiltermanualair
reliefvalve.
REPLACEMENTPARTS
1 DEX2420MAR2
MANUALAIRRELIEF
ASSEMBLY
2 CCX1000V
MANUALAIRRELIEFVALVE
WITHORING
3 CCX1000N
MANUALAIRRELIEFVALVE
NUT
4 DEX2420Z8A ORINGKIT(SETOF2)
5 ECX2712B1 PRESSUREGAUGE
Basicsafetyprecautionsshouldalways befollowed,includingthefollowing:Failuretofollowinstructi onscancausesevereinjuryand/or
death.
Thisisthesaf etyalertsymbol.Whenyouseethissymbolonyourequipmentorinthismanual,lookforoneofthefollowingsignal
wordsandb ealerttothepotentialforpersonalinjury.
warnsabouthazardsthatcouldcauseseriouspersonalinjury,deathormaj orpropertydamag eandif
ignoredpresents apotentialhazard.
warnsabouthazardsthatwillorcancauseminorormoderatepersonal injuryand/orpropertydamageand
ifignoredpresentsapotentialhazard.Itcanalsomakeconsumersawareofactionsthatareunpredictableandunsafe.
TheNOTICElabelindicatesspecialinstructionsthatareimportantbutnotrelatedtohazards.

Hayward DEX2420MAR2 Specifications

General

Brand	Hayward
Model	DEX2420MAR2
Category	Swimming Pool Filter
Language	English