IEC HPY 08 - Appendix B; Adjustment of EVO;ECM 4 SPD

FanCoils
INSTALLATION,OPERATION,&MAINTENANCEMANUAL
18
AppendixB
AdjustmentofEVO/ECM4SPD
AdjustingtheFlo1,Flo2,Flo3potentiometersrequiresthe
useofaMulti-metercapableofmeasuring0~5vdc.
1. Onlytrainedandqualiedindividualsshould
attempttoadjustorservicecomponentsonany
electricalcomponent.Failuretofollowsafetyrules
couldresultinelectricalshockorhazard.
2. 24vacpowermustbesuppliedtoECMboardto
makeadjustments
3. SettheelectricalmultimetertoVoltsDirectCurrent
(Vdc)onthe0~5or0~20Vdcscale
4. Attachblack(negative)leadofmetertothe“Com”
terminaltotheleftofthepotentiometersandbelow
theStatuslight
5. Attachthered(positive)leadofthemetertothe
highspeed“Flo1”terminalbelowthePotentiometer
6. HighSpeed:UsingasmallscrewdriverturntheFlo1
potentiometersothemetermeasures4.51Vdc.
ThiswillsettheECMspeedto90%ofmaximumfor
highspeed
7. MediumSpeed:Usingasmallscrewdriverturn
theFlo2potentiometersothemetermeasures
3.53Vdc.ThiswillsettheECMspeedto70%of
maximumspeedformediumspeedoperation
8. LowSpeed:UsingasmallscrewdriverturntheFlo3
potentiometersothemetermeasures2.06Vdc.
ThiswillsettheECMspeedto40%ofmaximum
speedforlowspeedoperation
9. ForsettingofFlo0andFlo4contactIECService
Department,otherwisethesepotentiometers
shouldbesettofullcounterclockwiserotation.
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)