SystemAir Danvent DV

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r.3.1Bagfilters
Releasethebagfiltercellsbyactivatingthehandlesandpulloutthefiltercellsoftheunitcasing.Theframe
profilesaretobecleanedandallsealscheckedfordamage. Thehandlesandlockingguiderailsarealsoto
be
checkedtoensurethattheycanoperate unob structed.Thenewfilterbagsmustbepushedcarefully
intotheunitinorderto ensurethattheyaresealedproperly.Thevariousfiltersizesshouldbeplacedinan
ordercorrespondingtothewayinwhichtheunitisdesigned,andthefiltersmusthave verticalbags.
r.3.2Panelfilters
Thef iltercellguiderailsareto becleanedbeforefittingthenewfilters.
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r.4.ChangingtheInternalBatteryinthecontroller 
Note:
ThisprocedurerequiresknowledgeofproperESDprotection;i.e. anearthedwristbandmustbeused
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Whenthealarm”InternalBattery”isactivatedandthebatteryLEDlightsupred,thebatteryforbackupof
programmemoryandreal‐timeclockhasbecometooweak.Thebatteryisreplacedasdescribed
below.A
backupcapacitorsavesthememoryandkeepstheclockrunningforatleast10minutesafterthepower
supplyisremoved.Therefore,ifthebatteryreplacementtakeslessthan10minutes,ther ewillbenoneed
toreloadtheprogram,andtheclockwillcontinuetorunnormally. 
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ThereplacementbatterymustbeofthetypeCR2032.
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Removethecoverbypressingdownthelocking
torquesattheedgeofthecoverusingasmall
screwdriver,andatthesametimepulling theedges
outwards.
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Gripthebatteryfirmlywithyourfingersandliftit
upwardsuntilitrisesfromitsholder.Pressthenew
batteryfirmlydownintoplace.Notethatto
preservecorrectpolarity;thebatterycanonlybe
insertedthe“rightwayround”.
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