IEC HPY 14 - 3-Speed Potentiometer Adjustment; Variable Airflow Control (0-10 VDC); 4-Speed Solid State Adjustment; Eco 2 Variable Airflow Setup

Fan Coils
INSTALLATION, OPERATION, & MAINTENANCE MANUAL
11
SECTIONTWO—StartUp,Cont'd.
3-Speed, Potentiometer Adjustment (Eco V 2 Only)
Potentiometer
Low, Med, High CFM adjust
TheunithasbeenfactoryconguredtoproducePSC
equivalentairowonhighspeed,withmediumandlow
speedsetat80%and60%ofhigh,respectively.Ifthese
settingareacceptable,thennofurtherconguringis
required.
Ifalternativeairowsaredesired,useboardmountedpots
toadjusttheairowassociatedwitheachinput.Each
outputcanbeadjustedfrom0to100%ofthemotor’s
factoryprogrammedoperatingrange.Usevoltmeterand
airowchart(oncontrolboxcover)tosetvalues.Referto
AppendixAforadjustmentprocedure.
4-Speed, Solid State with Potentiometer
SeephotoinAppendixBonpage18.Theunithasbeen
factoryconguredtoproducePSCequivalentairowon
highspeed,withmediumandlowspeedsetat80%and
60%ofhigh,respectively.Ifthesesettingareacceptable,
thennofurtherconguringisrequired.
Boardmountedpotsareprovidedtoadjusttheairow
pertainingtoeachoutput.Eachoutputcanbeadjusted
from0to100%ofthemotor’sfactoryprogrammed
operatingrange.Usevoltmeterandairowchart(on
controlboxcover)tosetvalues.RefertoAppendixBfor
adjustmentprocedure.
Variable Airow for 0-10 VDC
Flo 1, 2, & 3 Terminals
Flo 0 & 4 Terminals
Com
Pot Adjustment
Flo 1, 2, & 3
(in the Field)
Pot Adjustment
Flo 0 & 4
(Contact Factory)
IfafactoryprovidedthermostatorDDCcontrolleris
utilized,thentheunitisalreadycorrectlycongured.
IECrecommendsusingthespeciedthermostatorDDC
controllertocommissiontheunitwheneverpossible.
However,theblowercanbestartedandoperatedwithout
thethermostat.Todoso,locatejumper7nearthelarge
capacitor.MoveJ7from0-10toMan.Oncemoved,the
on-boardpotscontrolfanspeed.Toswitchthefaninthis
conguration,placeadrycontactin-lineontheenablewire.
Eco 2 Variable Airow for 0-10 VDC
Nocontrolboardisrequiredandnoeldadjustmentsare
possible.Motoruses0-10VDCsignaldirectly.Seecontrol
boxlabel.Fanenableat1.5VDC.
Water Treatment
Properwatertreatmentisaspecializedindustry.IEC
recommendsconsultinganexpertinthiseldtoanalyze
thewaterforcompliancewiththewaterqualityparameters
listedbelow,andtospecifytheappropriatewatertreatment
regimen.Theexpertmayrecommendtypicaladditivessuch
asrustinhibitors,scalingpreventative,antimicrobialgrowth
agents,oralgaepreventatives.Anti-freezesolutionsmay
alsobeusedtolowerthefreezingpoint.
IECwatercoiltubesandheadersareconstructedofpure
copper.Multiplebrassalloysmaybepresentinthevalve