SystemAir DANVENT DV10 - 4.5 Run-Around Heat Exchanger DVR; 4.5.1 Pump and Pressure Expansion; 4.5.2 Condensate Water Drain; 4.6 Heating Coil DVH, Cooling Coil DVK and Change over Coil DVHK

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r.4.5Run‐aroundheatexchangerDVR
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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.4.5.1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.4.5.2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.
r.4.6HeatingcoilDVH,coolingcoilDVKandchangeovercoilDVHK
Afteranextendedrunningperiod(normallyafewyears
) dust particlescanaccumulateonthesurfaceofthe
coil.Thiscanreducetheefficiencyofthecoil.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coil.
r.4.6.1Heatingbattery
Checkthatthefrostprotectionsystemisfullyoperational.Abatterymay
burstduetofrostifthefrost
protectionsystemisnotoperational.
r.4.6.2Coolingbattery
Onceayearcleanthedriptraybeneaththecoolingcoil,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.
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