Charnwood OLX - Preparation of the Fireplace; Central Heating System

770mm
670mm
SurroundandOpening
Dim.A:
Dim.B:
Min.555mm(213/4")
Max.470mm(181/2")
Min.405mm(16")
Theshadedareaonthefaceof
thesurroundistheminimumflat
arearequired.
Fig.7LimitingDimensionsOf
Max.579mm(223/4")
Fig.6.TypicalInstalation
usingflexibleflueliner
rightdowntoAppliance.
ClosurePlate
Rockwoolinfill
aroundflexible
lineraboveclosure
Rockwool
insulation
around
Appliance
Vermiculiteinfill
aroundFlexible
Liner
Firesurroundwith
removablemetal
closurepanels
100mmidsingleskin
flexiblefluepipe
HighTemperature
Siliconesealant.
ApplianceConnector
Fluefixingbrackets
Jointcaulkedwith
glassfibreropeand
sealedwithhigh
temperaturesilicone
sealant.
65mm
110mm
50mm
50mm
thepushonpieceof12mmbleedtubesupplied.
Placetheotherendofthebleedtubeintoasuitable
receptacle,andflushoutthesupplylinebyturning
ontheservicevalve.Whentheoilisclean,turnoff
theservicevalve,removethebleedtube,andre-
attachtheflexibletubefromtheburner.Turnthe
servicevalvebackon,checkforleaks,andcleanup
anyspiltoil.
PREPARATIONOFFIREPLACE
CENTRALHEATINGSYSTEM
Whenreplacinganexistingboiler,removeanyfireback
andinfillmaterialtoexposethebuildersopening.
Theopeningmustbeatleast400mmdeep(when
measuredfromthefrontfaceofthesurround,)600
mmwide(togiveaccesstotheboilerconnections,)and
650mmhigh(togiveaccesstotheflueconnection.
Ensurethatthebaseofthefireplaceislevelwiththe
hearthandthatthefaceofthesurroundisvertical.
Itisnecessarytohaveasmallcutoutinthefireplace
surroundatthebottomleftoftheopeninginorderto
bringtheoilandelectricalsupplytothefire.Itisalso
necessarytohaveasmallcutoutatthebottomrightof
theopeningtocleartheairinletduct.Seefig.7.
ThecentralheatingsystemmustcomplywithBS5449,
andshouldbeinstalledinaccordancewiththecurrent
goodpractiseguidelinesasadvisedbytheHVCA.
Centralheatingdesignisalargesubjectwhichitisnot
possibletodealwithadequatelyinthismanual.The
pointsthatareparticularlyrelevanttothisboilerare
dealtwithbelow.
Theheatingandhotwatersystemshouldnormallybe
fullypumped,althoughagravityhotwatersystemmay
beusedifitalreadyexists.
Therearenointernaldivisionsinthe boiler,andany
combinationofflowandreturntappingsmaybeused.
Ifitispossiblethendiagonalpairsoftappingsshouldbe
used,butpairsonthesamesidemaybeusedif
required.
Themaximumworkingpressureoftheboilermustnot
exceed3Bar(44psiorastaticheadof30m)
Inordertopreventabuildupofscaleandcorrosiona
suitableinhibitorshouldbeaddedtothesystem.
Whenreplacinganexistingboilerthesystemshould
bethoroughlycleanedbeforeconnectingthenew
boiler.
Fullyautomaticcentralheatingcontrolsmaybeusedto
givefullcontroloftheheatingandhotwater.When
designingthecontrolsystemitisimportanttonotethat
ifthesituationcanarisewheretheflowofwater
throughtheboilerisstopped,orsubstantiallyreduced,
whilsttheburnerisstillfiring,thenthiscanresultinthe
waterintheboilerreachingveryhightemperatures,or
evenboiling,beforetheboilerthermostatcansenseit
andswitchtheburneroff.Ifthisisapossibilitythen
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OLXV5.205.04