Reznor ULSA 035(EC) - Condensation Drain Pipe Connection

1701ULSA(EC)--EN, p. 16/30
PropercombustionairsupplyforapowerventedtypeBinstallationrequiresventilationoftheheatedspace.
Naturalinfiltrationofairmaynotbeadequate.Useofexhaustfansaggravatesthissituation.Itisimportantto
ensurethatthereisadequatecombustionairsupplyatalltimes.Relianceondoorsand
windowsisnotpermitted.
Alwaysensurethatenadequateinletforfreshairforcombustionisprovidedsizedtosuitthetotalinstallationof
anycombustionapparatus.
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8CONDENSATIONDRAINPIPECONNECTIONS
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 All ULSA/ULSA EC units are designed with a built‐in siphon (PN 70 61761) (figure 9).Attention : in case 
replacementofsiphonisnecessary,ensurethatsiphoniscorrectlyinstalled.(seefigure10).
Figure9Figure10
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 Itisrecommendedtouse
aPVCdischargepipe.
 The condensation connection between the air heater and the siphon has a 32 mm diameter and must be
glued(leakproof)ontothesiphoninlet.
 To ensure the condensation water does not freeze, it is recommended to mount the drain pipe inside the
building.
Ifthereisnootherchoicebutmountingitoutside,itisstronglyrecommendedtoequipitwithfrost
proofinsulation.
 Whenconnecting the siphon, it is necessary to use sealing rings (in the siphon outlet). Ensure these sealing
ringsarecorrectlymounted.
 Condensationdrainpipe connectionsmustbe
glued,to preventcondensationwater drippingfromthedrain
pipe.
 Ifyouwanttoopenthesiphon(e.g.tocleanit),theairheatermustbeshutdown.
 Forsecurityreasonsitisrecommendedtoweargloveswhencleaningthesiphon.
 Thesiphonhastobecleaned
yearlyandalsocheckedformetalsludge.Intheeventthatthereisalotofmetal
sludgepresent,theairheatermustbeservicedmorefrequently.
 The condensation water coming from the air heater has a pH‐level of approx 4.6 and can affect materials
madefrom
 zinc
and/orcopper.
 Hence,itisstronglyadvisedagainstlettingthecondensationwaterflowoffthroughthegutter.
 Condensationwaterdoesnotbelonginarain‐watertank!
 Downstreamfromthetrapsthecondensatedrainsmaybejoinedandbothmustbeconnectedtoasanitary
drainwithin
thebuilding.Checkcodestobecertainthatthisispermitted(condensatefromtheheaterhas
abouttheacidityofsodapopand isnotharmfultoasanitarydrain).ULSA/ULSAECheaterswillproduce
condensatedependingonsizeandgastype(seetable3).
 Acondensatedisposalsystem
thatreliesongravityshouldbesatisfactoryformostinstallationssinceunit
heatersarenormallyinstalledseveralmetresabovethefloor.
 Ifagravitysystemisnotpossible,acondensatepumpmustbeinstalled.Thereareanumberofcommercially
availablepumpsmadeforthispurpose.Ifusingacondensate
pump,followthepumpmanufacturer’s
installationrecommendations.
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Table3:
Condensedrainratesofflow
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ULSA/ULSA EC 025 035 050 075 100
Natural gas/
Propane
l/h1,21,31,82,13,7