EngA DJM3

A DJM3
IOM-17 8 of 27 Mar 99 R3
3 ON
Thedischargesensorisbelowcalculatedsetpoint(SPC)andtheDJM3has
initiatedtheheatingsequence.
Normaloperatingstatus:ONforheating.
3 2SEC
Thereisacallforheating,howevertheheatinghasbeendisabledfromno
inputintoterminalHS(24Vac).
Normaloperatingstatus:OFF.
3
INT
FLASH
Unitisinservicemode,allowingthetechniciantomanuallysettheheating
fromlowtohighfirewiththeservicepot.
Normaloperatingstatus:OFF.
4 ON
FRandCFRcontactshaveclosed,enablingtheignitioncontroltofirethe
burner.
Normaloperatingstatus:ONforheating.
4 1SEC
Burnerignitionwasunsuccessful.TheDJM3didnotreceiveamaingasvalve
(SSOV)feedbacksignalintoterminalsVFB24orVFB120.
Normaloperatingstatus:OFF.
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ADJUSTMENTPOTS
Thereareanumberofsettingandcalibrationpotentiometers(POT’s)locatedonthefrontofthe
DJM3.Modificationstotheseshouldonlybedonebyexperiencedandqualifiedpersonnel.
TABLE4
POT Description
DSENCAL Dischargesensorcalibration.
DISSPCAL Dischargesetpointcalibration.
BMSCAL BMS(0‐10Vdcor4‐20mA)resetcalibration.
ROOMCAL Roomsensorcalibration.
SERVICE Servicemodepot.
RESETRATIO Temperatureresetrangeadjustment.
LOWFIRE* LowfirespeedRPMadjustmentpot(nearterminalPV1).
CURVEMATCHING* ValvecurvematchingRPMadjustmentpot(nearterminalCS).
SETPOINT Ifused,theon‐boarddischargesetpointdial.
*Thesepotsshouldonlybeadjustedwhenusedwithacombustionanalyzer.
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