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DehumidierML420-MLT1400

5Commissioning

TheML420-MLT1400dehumidiershaveseveralstandardfunctionsthatneedtobesetbeforeinitial

start-up.Someofthefunctionsrequireconnectiontoexternalequipment.

Somefeaturesrequireconnectionofexternalequipment.Forwiringdetails,seethewiringdiagram.

5.1Settingsbeforestart-up

5.1.1Continuousprocessairfanoperation

Standardsettingsautomaticallyactivatetheprocessairfanonlywhendehumidicationisrequired.

However,continuousprocessairowcanbedesirableevenwhendehumidicationisnotrequired.

Continuousprocessairowcanbeset,seethewiringdiagram.

5.1.2Single-stagehumiditysensor

NOTE!Whennohumiditysensorisconnected,thedehumidierwillrunatmaximumeffectcontinuously.

Ifasingle-stagehumiditysensoristted,thiswillswitchthedehumidieronandoff.Asingle-stage

humiditysensorisconnectedaccordingtothewiringdiagram.

Tomaintainaircirculation,preselectcontinuousoperationoftheprocessairfaneventhough

dehumidicationisnotrequired.Forfurtherinformation,seesection5.1.1,Continuousprocessairfanoperation.

5.1.3Two-stagehumiditysensor

NOTE!Whennohumiditysensorisconnected,thedehumidierwillrunatmaximumeffectcontinuously.

Ifatwo-stagehumiditysensorisconnected,thiswillcontrolthereactivationheaterintwostages.The

reactivationpoweriscontrolledonthebasisofthehumiditysensorreadingandthesetpoint.Atwo-stage

humiditysensorisconnectedaccordingtothewiringdiagram.

Tomaintainaircirculation,preselectcontinuousoperationoftheprocessairfaneventhough

dehumidicationisnotrequired.Forfurtherinformation,seesection5.1.1,Continuousprocessairfanoperation.

5.1.4Remotefaultindication

ThePCBdisplaycanbeusedforageneralindicationofthefollowingfaultsonthedehumidier:

■Processairfan

■Reactivationairfan

■Drivemotor

■Heater

■Auxiliaryequipmentinput

■Rotorhasstopped(ifthisoptionisinstalled)

■Blockedprocessairlter(ifthisoptionisinstalled)

■Blockedreactivationairlter(ifthisoptionisinstalled)

190TGB-1035-H1604Commissioning15

Munters ML270 User Manual

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