SystemAir Danvent DV


54
Ifthereisdustontheedgesoftheplates,removeitwithasoftbr ush.Ifgreaseorothersuchsubstances
arepresent,thentheedgesmustbewashedusinggreasedissolvingdetergents
.
r.5.4.1By‐passdamper
Thedamperbladesarefittedwithsyntheticbearings requiringnolubrication. Eachda mperbladeis
connected byapivotingsystem.Thesteelrodsandbrassbushesdo notrequirelubrication.Air‐tightnessof
thedampers,whenthedampermotor  isintheclosedposition,mustbe
visually checked onceayear.The
dampermotor istobeadjustedifthedamperdoesnotclosetightly.
r.5.4.2Condensatewaterdrain
Onceayearcleanthedrip  traybeneaththeheatexchanger,aswellasthedrainandthewatertrap.
Takecarethatthatthereissufficientwaterinthewatertrap.Ifadropleteliminatorhasbeenfitted,this
mustbecheckedonceayearandcleanedifnecessary.
r.5.5Run‐aroundheatexchangerDVR



















Aheatrecoverysystemofthistypeconsistsofaheatingcoilinthesupplyair‐flowandacoolingcoilinthe
exhaustair‐flow.Afteranextendedrunningperiod(normallyafewyears)dustparticlescanaccumulateon
thesurfaceofthecoils.Thiscan
reducetheefficiencyofthecoils.Cleaningmustbecarriedoutwiththe
utmostcaretoensurethatthecoilfins arenotdamaged.
Thepipingsystemmustbeventedonceayearasairinthesystemcansignificantlyreducethecapacityof
thecoils.
r.5.5.1Pumpandpressureexpansion
Theserviceinstructionsissuedbythepump manufacturermustbefollowed.Thepressureexpansionsystem
mustbecheckedonceayear.Ifnecessary,thepressuremustbeincreasedto the
cor rectlevel.
r.5.5.2Condensatewaterdrain
Onceayearcleanthedrip  traybeneaththeheatexchanger,aswellasthedrainandthewatertrap.
Takecarethatthatthereissufficientwaterinthewatertrap.Ifadropleteliminatorhasbeenfitted
to the
coolingcoil,thismustbecheckedonceayearandcleanedifnecessary.