Rheem RH18537 Installation guide

001Ͳ4272  AP18531(10/16)

WaterRecirculationPipingDiagram(withDedicatedReturnLine)

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NOTICE:Toconserveenergyandminimizeheatloss,insulationofhotwaterlinesisrecommended.

Linesshouldbecleanedandflushedbeforeinstallingpump.DONOTenergizepump untilproperlyinstalledand the

systemischeckedforleakandco mpletelyfilled.Pumpshouldbefloodedwithwaterbefore

itisstarted.

CAUTION:Avoidrunningcirculatorpumpdryasthiswilldamagethecirculatorpump.

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RheemPartNumber PumpConnection

Size

Motor

Voltage/Frequency/Phase RPM HP

AP18403 ½”maleNPT 115VAC/60Hz/1 3250 1/25

MaximumAllowableEquivalentPipeLength*

PipeDiameter(CopperPipe) 3/4” ½”

Maximumallowableequivalent

pipelength

400ft. 100ft.

*Equivalentpipelengthincludeshotwaterline,dedicatedreturnlineandallfittings.

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WaterRecirculationPipingDiagram(UnderSinkApplication)

Pumpcanbeinstalledund ersink(furthestfixture)forretrofitapplicationsthatdoesnothavededicatedreturnlines.

Thiscanbedonebyusingappropriatefittings(notprovidedinthiskit).

CAUTION:Warmwatermaybepresentincoldwaterfixturesandcoldwaterlineduringpumpoperationand

shortperiod

thereafter,whenusingcoldwaterlineasareturnline.

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NOTICE:Toconserveenergyandminimizeheatloss,insulationofhotwaterlinesisrecommended.

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ActivationAccessories

RheemPart

Number

Description Whatitdoes

SP20861 Remotetransmitter,receiverkit Startsystemwithwirelessremotecontrol

SP20862 Motionsensorstarterkit Startsystemwithautomaticmotionsensor

SP20863 Individualstarterbutton  StartsystemwithhardͲwiredpushbutton

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NOTICE:Ifrequiredthelengthofthepushbuttonwirecanbeincreased.Extensionwirecanbeany18AGWwire

similartoathermostatwireandneednotbepolaritysensitive.Attachextensionwireusingappropriatewirenuts.It

isnotrecommendtohavethewiresexpos ed.

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