Engineered air EngA W-TRAC User Manual

A W-TRAC
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IOM‐49 11of12 Mar99R4
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LowSpeed
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TurnonDIP5todrivetheoutputtominimum(0Vdc).AdjusttheminimumspeedpotontheKBVF
inverterdriveuntiltheheatwheeljustbeginstoturn,usuallybetween0.5and2rpm.Turnthepoweroff,
andthenrestartthesystemtoconfirmthemotorhasenoughstartingtorquetoreliablystartrotatingthe
heatwheel.
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ReturnallDIPswitchestotheiroriginalposition.
WHEELROTATIONSPEED
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Maximumwheelrotationspeedwillbefactorysetintherangeof30‐40rpm,at60Hz,dependingonthe
sizeoftheheatwheel.
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Minimumwheelspeedisdependentonthestartingtorqueofthemotorandheatwheel,usuallybetween
0.5and2rpm.
SENSORCALIBRATION
DischargeTemperatureCalibration
Removethesupplyairtemperaturesensorandmeasureboththesensorresistanceandthetemperature
atthesensingelement.Comparethesereadingstothesensortablevalues.Iftheresistanceisoutby
morethan16ohms,replacethesensor.
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 Measuringasensortemperaturebetween60–70°F,slowlyrotatethetemperaturesetpointdial
counterclockwiseuntilthe‘DischargeTooHot’lightjustcomeson.
 Slowlyincreasethetemperaturesetpointdialuntilthelightgoesoff.
 Thesetpointshouldmatchthesensedtemperaturemeasurement.Ifnot,adjustthecalibrationpot
andrepeattest.
ExhaustTemperatureCalibration
Removetheexhaustairtemperaturesensorandmeasureboththesensorresistanceandthetemperature
atthesensingelement.Comparethesereadingstothesensortablevalues.Iftheresistanceisoutby
morethan16ohms,replacethesensor.The‘badsensor’LEDmayturnonandoffduringthisprocedure.
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 PlaceajumperwireacrossterminalsAandC1.
 Removetheexhausttemperaturesensorandreplacewitha909Ωresistor.
 NotethepositionoftheBDRHpot,andthenadjusttoposition2.

Engineered air EngA W-TRAC Specifications

General

Brand	Engineered air
Model	EngA W-TRAC
Category	Controller
Language	English