System Installation Guide
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69-2688—07 I/O-CHTSTAT03
Dehumidification - Commercial
Thethermostatreadstheindoorhumiditylevelandallowstheusertoseta
dehumidification setting.
Dehumidificationusingthecoolingsystemhasthefollowingmethodsof
dehumidificationcontrol(ISU9080):
Basic:Thisoptionusesthecoolingsystemtoreachthedesiredhumiditylevel.
MinimumOnTimeandHighHumidityComfortResetarenotusedwiththismethod.
Thisoptionshouldonlybeusediftheequipmentcanlowerthefanspeedinacallfor
dehumidification.
Minimum on Time (ISU 9090):Thisoptionensuresthatthecompressorrunslong
enoughtoeffectivelyreducehumiditywhenthecoolingequipmentiscycledon.The
compressorwillrunfortheminimum"ontime"yousetuntilthedesiredhumiditylevel
is reached.
High Humidity Comfort Reset (ISU 9100):Thisoptionusesthecoolingsystem
tolowerthetemperatureupto5Fbelowthecurrentcoolsetpointuntilthedesired
humidityisreached.Thehighhumiditycomfortrangeisfrom1to5F.
High Humidity Comfort Reset with Minimum On Time (ISU 9090 and ISU
9100):Thismethodusesbothoptionsabovetoreducehumiditywhilemaintaininga
comfortabletemperature.
To see all dehumidification options, press MENU > INSTALLER OPTIONS > VIEW/EDIT CURRENT SETUP >
DEHUMIDIFICATION.