Munters ML690 - Automatic Mode - Humidity; Automatic Mode - RH98 or

DehumidierML420-MLT1400
4.Setthemodeswitchonthecontrolpanelto”0”andcheckthatboththeindicatorlampsforthe
reactivationheatergoout.
NOTE!Inordertodissipateanyresidualheat,thereactivationairfan,processairfanandthedrivemotorwill
continuetorun(aftertheunithasbeenswitchedoff)untilthetemperaturehasfallenbelow50°C.
5.Checkthattheprocessairfan,reactivationairfananddrivemotorindicatorsgooutwhenthe
temperaturefallsbelow50°C,andthatthepowerconnectedindicatorremainson.
Fordetailsontheoperatorpanel,seesection6.4,Operatorpanel
6.6.2Automaticmode–humiditysensorconnected
Asingleortwostagehumiditysensormustbeconnectedfortheunittoberuninautomaticmode.For
furtherinformation,seesection5.1.2,Single-stagehumiditysensorand5.1.3,Two-stagehumiditysensor.
1.SetthemodeswitchtoAUT.
2.AdjustthehumiditysensorsetpointtothelowestRHvalue.Setthemainpowerswitchto”1”(on).
Checkthatthefollowingindicatorlampsareonandthattheunitisrunning.
■Mainssupplyconnectionindicator
■Unitrunningindicator*
■Bothreactivationheaterindicators*
■Bothprocessairandreactivationairfanindicators*
■Drivemotorindicator*
NOTE!IfthecurrentRHvalueintheroomtobedehumidiedislowerthanthesetpointonthehumiditysensor,
theaboveindicatorswillnotlightandthedehumidierwillnotstart.
3.Slowlyincreasethehumiditysetpointandcheckthattheunitswitchesoffwhenthesetpointmatchesthe
RHintheroomwherethehumiditysensorisinstalled.
4.Slowlydecreasethehumiditysetpointandcheckthattheunitswitchesonwhenthesetpointfallsbelow
theRHintheroomwherethehumiditysensorisinstalled.
5.Setthemodeswitchonthecontrolpanelto”0”andcheckthatboththeindicatorlampsforthe
reactivationheatergoout.
NOTE!Inorderfortheunit’sheaterstocooldown,thereactivationairfan,processairfanandthedrivemotorwill
continuetorun(aftertheunithasbeenswitchedoff)untilthetemperaturehasfallenbelow50°C.
6.Checkthattheprocessairfan,reactivationairfananddrivemotorindicatorsgooutwhenthe
temperaturefallsbelow50°Candtheunitisrunning,andthatthepowerconnectedindicatorremains
on.
7.AdjustthehumiditysetpointtothedesiredRHvalue.
Fordetailsontheoperatorpanel,seesection6.4,Operatorpanel
6.6.3Automaticmode-RH98orVariDry(option)
IftheunitisttedwithafactoryinstalledRH98orVariDry(option)humiditycontrolsystem,theexternal
humiditysensormustbeinstalledandcorrectlyconnectedtotheunit.Thesamesiterequirementsapplyto
thehumiditysensorandRH98orVariDry,seesection4.8,Externalhumiditysensor.
Formoreoperationaldetails,seeappendix1.6,Humiditycontrolsystem.
1.SetthemodeswitchtoAUT.
22Operation190TGB-1035-H1604