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88•dap4UserManual

AUTOMATIC FLUSH CYCLE for CHILLED WATER or HOT WATER COILS

If 100 hours elapses and the chilled water or hot water valve has not opened for normal cooling or

heating,thevalvewillautomaticallyopenfor30secondstoushthecoil.Thedisplaymodulewill

notdisplayamessageindicatingtheushcycleisinprogress.

HUMIDIFIER AUTO-FLUSH TIMER CONTROL

1.Humidierauto-ushtimerisoptional.Theauto-ushtimerisonlyavailableonunitswithinfra-

 redhumidiers.

2.Theauto-ushtimerisprogrammable(SeeMenuJ–FactorySettings).

3.Theauto-ushcycletakes11minutes.Thesequenceisasfollows:

• Fortherstfourminutesthedrainsolenoidisopenedandhumidicationisinhibited(the

displaymodulewillhavethefollowingmessage:HumidicationInhibitedbyAuto-Flush).

Humidity related alarms are disabled.

• Duringthefthandsixthminutesthesolenoidisclosedandthedrainstartstoll

• Fromminutesseventhrougheleventhehumidicationisenabledandthepancontinues

toll.TheHumidicationInhibitedmessageisdiscontinued.

• Afterelevenminutesthehumidityalarmsareenabled

HUMIDITY ANTICIPATION

1. Humidity anticipation is programmable: ON or OFF (See Menu J – Factory Settings)

2.WhensettoON,thehumiditysetpointisautomaticallymodiedtoreduceexcessivehumidifying

and dehumidifying.

• Thehumiditysetpointisdecreasedby1%for1.5°Fthereturnairtemperaturerises

abovethetemperaturesetpoint.Themaximumamountthehumiditysetpointmaybe

decreased is 10% (15°F above the return air temperature setpoint).

• Thehumiditysetpointisincreasedby1%forevery1.5°Fthereturnairtemperaturefalls

belowthetemperaturesetpoint.Themaximumamountthehumiditysetpointsmaybe

increased is 10% (15°F below the return air temperature setpoint).

MANUAL OVERRIDE

When the manual override function is used, the automatic functions of the processor are disabled

and all desired functions must be changed to manual override. The display module will indicate

Manual Override.

TEMPERATURE and HUMIDITY SENSOR PROBLEM

1. A temperature sensor problem will activate all of the cooling stages if the unit is operating at the

time of the problem.

2.Ahumiditysensorproblemwillinhibitthehumidicationordehumidicationfunctionsiftheunit

is operating at the time of the problem.

Data Aire dap 4 User Manual

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