Davey XP/T - Where to Use Check Valves and Foot Valves; Torrium2 Check Valve Removal; Extra Draw-Off Capacity; Evaporative Coolers, RO Filters and Extra Draw-Off Capacity

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Where to use Check Valves and Foot Valves
TheTorrium2
®
controllerhasaninbuiltnon-return(check)valvetted.Inooded
suctioninstallationsthereisnoneedtohaveasuctionnon-returnvalve.
Insuctionliftinstallationsafootvalvewillnormallyberequiredforthepumpto
retainprime.
Insomesuctionliftinstallationstheremaybegoodreasontoremovetheinbuilt
checkvalvetoensurethatthedischargepressureisalsoappliedtothesuctionline
andfootvalve.Thiscouldbewherethesuctionlinewasverylongorwherethere
wasconcernregardingaleakingfootvalve.Thismaynotalwaysbeapplicableand
itisacceptabletoretaintheinbuiltcheckvalveintheTorrium2onsuctionliftswith
goodsuctionplumbing.
Shouldtheinbuiltcheckvalveberemovedthough,anadditionalaccumulator
shouldbettedtotheTorrium2,ordischargepipeworkasapplicable,toensurethe
pumpisnotcycledonshutdown.Thesizeofthisaccumulatorwilldependonthe
size,lengthandtypeofpipeusedonthesuction.
Torrium2 Check Valve Removal
Useunionsatpipeconnectionstoenableeasyremoval
andservicing.Usesufcienttapetoensureairtightseal
andhandtightenonly.Topreventstrainonpumpthreads
alwayssupportheavyinletandoutletpipes.Ifthereis
alikelihoodthewatersupplymaycontainsolidparticles
suchaspiecesofplantorvegetablematter,altershould
beinstalledbeforethepumptoavoidblockingofwater
ways.Laysuctionpipeataconstantgradienttoavoidair
pocketswhichmayreducepumpefciency.
NOTE: Suction leaks are the largest cause of poor pump performance and
are difcult to detect. Ensure all connections are completely sealed using
thread tape only.
Flexible pipe should be considered to allow for movement between
building, pump and/or water supply. Braided hose, reinforced hose or
polythene pipe are suitable.
Do not use pipe thread sealing compounds on any part of this pump. ONLY
use Teon sealing tape.
Removeprimingcapand
turnovercap.Lugson
capwillengagecheck
valvetounscrew.
Extra Draw-off Capacity
TheTorrium2
®
controllerhasanin-builtaccumulatorwhichwillaccommodatesmall
leaks.Insomeapplicationsitmaybeappropriatetoinstalladditionalaccumulator
(Supercellpressuretank)capacity.Theseapplicationsincludes:
• Longsuctionlines(seeSuctionLines/Lift)
• Lowowappliancesconnectedtothepump,suchasevaporativeair
conditioners,slowllingtoiletcisterns,etc.
Anyadditionalaccumulatorscanbeinstalledeitherinplaceofthepriming
plug(seeFigure1)fortanksupto20litrestotalcapacity,orforlargertanks,
downstreamofthecontroller(ie.betweenthecontrollerandtherstoutlet).
Whereextradraw-offcapacityisutilisedtheadditionalpressuretankshouldhavea
pre-chargeof70%ofthemaximumsystem(shut-off)pressure.
Evaporative coolers, RO lters and extra draw-off
capacity
WhereaTorrium2
®
equippedpumpisrequiredtosupplywatertoanevaporative
cooler,reverseosmosis(R.O.)lterorsimilarlowowdevice,theTorrium2
®
willdetect
thelimiteddemand.ThiswillresultintheTorrium2
®
adaptingtotheslowdemand.The
pumpstartpressurewillbeallowedtodroptoalowercutinpressureeachtimelow
owsaredetected.Toprovidethemaximumdraw-offfromtheadditionalpressuretank,
thetank’spre-chargeshouldbesetat45%ofthepumpshut-offpressure.
Ifnormalowisrequiredfromyoursystem,Torrium2
®
willinitiateinstantstart.
FittheSupercellpressuretank(upto20litrestotalcapacity)tothetankconnection/
priming port with thread tape and pipe socket.Firmlyhand tighten.Forlargertanks,
theseshouldbeinstalleddownstreamofthecontroller.
NOTE: If tting a tank to the priming port, you may require a 1”
BSP socket, since both Torrium2
®
prime port and tank are 1” male
threads.
DO NOT USE THREAD SEALING COMPOUNDS, HEMP OR PIPE DOPE!
Installationswithoodedsuctionrequire
agateorisolatingvalvesowatersupply
canbeturnedoffforpumpremovaland
servicing.
Abrasive Materials
The pumping of abrasive materials will cause damage to the pressure
system which will then not be covered by the guarantee.