EHC SLIMJIM - Page 6

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GB-063C_f.615
GENERAL
1. General
 Theboilermustbeinstalledbyaprofessionalplumberorheatingengineerandmustbeconnectedto
thepubliclowvoltagenetworkbyacompetentperson.Werecommendthisisinstalledbya17thEdition
certiedElectrician.
 The Electric Heating Company Ltd will not be held responsible for any faulty installations which
are performed by un-qualified tradespersons.
2. Pipe Connections
 SlimJimElectricBoilershave22mmcompressionconnectionsattheboiler’sowandreturnpipes.Please
notethattheboilersaresuppliedwithblankingplugsfortransitpurposes.Thesemustberemovedbefore
connectionstoexternalpipescanbemade.
 The Flow Outlet (TopRedConnection)andReturnInlet(BottomBlueConnection)areclearlymarked
withintheboilercase.Under nocircumstancesshouldtheseconnections bereversed. HotSoldered
Jointsshouldnotbemadeasadirectconnectiontotheboiler,Compressionjointsshouldused.
3. Case Removal
 Inordertotakeoffthefrontcover,undothexingscrewsatthetopandbottomoftheunitandpullthe
covertowardyou,Careshouldbetakennottodamagethefrontcontroller.
4. Isolation Valves
 Werecommendthatlock-shieldisolationvalvesarettedontheFlowandReturnpipe-work.Suchvalves
mustbefullboreandnot“ballvalves”.Theinstallationof“ballvalves”intheowandreturnpipe-work
willreducetherecommendedowratesthroughtheboiler.

!
Care must be made when installing the isolation valves that the PRV and expansion positions
are not impaired.
5. Auto air vents
 Anautoairventmustbettedtotheexternalpipeworkwheninstalledinanunventedsystem.

!
Do not install AAV’s directly above the SlimJim boilers. AAV’s should be installed to either the
top left or right hand side of the boilers. (This is to prevent any water entering the boiler in the event
of an AAV leaking).
6. Boiler Sizing
 Calculatethe“SpaceHeating”requirementsinaccordancewithBSEN12831andBSEN14336.Ifthe
boileristoheatthedomestichotwater,anadditionalallowanceof3kW(10,239Btu’s)shouldbemade
tothe“Spaceheating”calculationtodeterminethecorrectboileroutput.
7. Insulation
 Wherepractical,andifpossible,werecommendthatallpipe-workisinsulated,inparticulartheprimary
pipe-workwithinaboilercupboard.Thisistoreduceheatlossandreducehighcupboardtemperatures
fromexposedpipe-work.(BS6700+A1).
8. System Design
 AstheSlimJimboilersareoflowwatercontentanopencircuitmustbeachievedincorporatingapprox2
metresofcontinuous22mmpipeworkaftertheboilerconnectionsandbeforeanyzonevalves.(SPlan)
Wealsorecommendthatamagneticlterisusedandinstalledintothereturnpipeworkofthesystem
beforethepumpaspertheschematiconpage10.Provisionshouldbemadetoallowtheltertobe
cleanedwithoutdrainingthefullheatingsystem.