CONTROLOFCHTEMPERATURE
Theoutput temperatureofCHwaterisadjustablefroma
minimumofabout38°Ctoamaximumofabout85°Cby
turningtheknobC.
ApproxCHflowtemperaturesfortheboilerthermostat
settings:
Minimum(38 °C)
Maximum(85 °C)
C
CONTROLOFDHW TEMPERATURE
(MiniC24,MiniC28 andMiniC32)
ThetemperatureoftheDHWleavingtheboilercanbevaried
fromaminimumofabout35°Ctoamaximumofabout55°C
(withinthepowerlimitsoftheappliance)byturningthe
temperaturecontrolknobB.
Minimum(35 °C)
Maximum(55 °C)
B
AdjustmentoftheDHWtemperatureiscompletelyseparate
fromthatoftheCHcircuit.
Theadjustmentsystemintegratedwithintheboiler
automaticallycontrolstheflowofgastotheburnerinorderto
keepthetemperatureofDHWdeliveredconstant,between
thelimitsofmaximumandminimumoutput.
Wherethedemandisatalowlevelorwiththetemperature
set totheminimum,itisnormaltosee acycleoflightingand
extinguishingoftheburnerwhenrunning.
Adjustment
Itisadvisabletoadjust theDHWtemperaturetoalevel
commensuratewiththedemand,minimisingtheneedtomix
withcoldwater.Inthisway,theautomatic controlfacilitieswill
befullyexploited.
Moreover,wheretheamountoflimescalepresentinthewater
maybeparticularlygreat,notexceedingthepositionas
showninthefollowingillustration(about50 °C)minimises
annoyingincidencesofscaledepositsandclogging.
B
Inthesecases,however,itisadvisabletoinstall asmall water
treatmentdeviceorsoftener.Withsuchadeviceyoushould
avoid periodicdescaling.
Consequently,theDHWheatexchangerwill keepits
performanceconsistentforalongerperiodoftimewith
resulting gas savings.
TOSHUTDOWNTHE BOILER
Forshortperiods
Toturntheboileroff set thefunctionselectorCtotheO
position.
TheapplianceOnlampAwill flashevery4seconds.
Forlongperiods
Whenyoudonotexpect tousetheboilerforalongperiod:
1Switchthethe electricitysupplyoff.
2Shutoff thegas supplycockandthevalvesforthewater
circuitsfittedundertheboiler.
3Ifnecessary,emptythewatercircuits.
FROSTPROTECTION
MiniC24,MiniC28 andMiniC32 appliancesareprovided
withabuiltinanti---freezesystemthatoperatestheboiler
whenthetemperatureisbelow4°C
Therefore,whentheboilerisnotlitandusedincoldweather,
withconsequentriskof freezingdonotisolatetheboiler
fromthe electricitysupplyorclosethegasinletcock.
ESCAPEOFGAS
Shouldagasleakorfaultbesuspectedcontactyourlocal
gas supplierwithoutdelay.
Donotsearchforgasleakswithanakedflame.
CLEANING
Fornormalcleaningsimplydustwithadrycloth.
Toremovestubbornmarksandstainsuseadampclothand
mild detergent.
Donotuseabrasivecleaningmaterials.
MAINTENANCE
Theapplianceshould beservicedatleastonceayearbya
CORGIregisteredinstaller.
FAULTS
Noheatingorhotwater
Checkthatgasandelectricityareavailableat theboilerand
thatall switchesareon.
Checkthat thesystemwaterwaterpressuregaugeGreadsat
least0,5bar.
Checkthelock---outsignal lampE.Ifitisilluminated press the
boiler resetbuttonDtorestart theignitionsequence.
Hotwaterbutnoheating
Checkthat theprogrammerandroomthermostat(if fitted)are
bothcallingforheat.
Heatingbutnohotwater
Checkthatcoldwaterflowsoutofthetapsataminimumrate
of3.5litresperminute(or1pintin10 secondsorless).Ifnot,
lookforstopvalvesnotfullyopen.
Ifthesesimplechecksfailtosolvetheproblem,orthe
problemrecurs,consultyourservice engineer.