Quest Engineering DEH 3000R

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Quest DEH 3000R Installation, Operation and Maintenance Instructions
12
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3.8 Damper Operation and Ventilation,
Manual (Hold) Mode
The“VENT”settingcontrolstheventilationfunctionofthesystem.Ithasnocontroloverthedehumidication
function.Inordertoprovideventilation,themotorizeddampermustbeopenandthefanmustberunning.The
controllertakescareofthesetwofunctionsautomaticallysothatwheneverthedamperisopen,thefanisrunning.
Theventilationindicator“O”willbedisplayedwhenevertheunitisventilating.Thefanoperationindicator“O”
willalsobelit.
Therearethreedamperoperationmodes:
1.“OPEN”–holdmode:Thedamperwillbeopenandthedehumidierfanwillbecontinuouslyoperatingto
introducefreshairintothespace.Usethismodeforcontinuousfreshairventilation.Thefanisalwaysonwhen
thedamperisopen.
2.“CLOSED”–holdmode:Thedamperwillneveropen,andthedehumidierwillnotventilate.Thefanwillstill
operatenormallyforrecirculationanddehumidication.
3.“PROGRAMMED”mode:TheQuestDEH3000Rwilloperatethemotorizeddamperandthedehumidierfan
accordingtotheprogrammedventilationschedule(Section3.9).
Thefactorypresetforthe“VENT”settingis“CLOSED”.
Toset“OPEN”–holdor“CLOSED”–holdventilationoperation:
1.Pressthe“VENT”button.Thecurrentsettingwillbegintoashonthedisplay.Releasethebutton.
2.Pressthe“VENT”buttonagaintoswitchbetween“OPEN”and“CLOSED”.
3.Leavethecontrolalonefor10secondsandyoursettingswillbesaved.
Damper Operation and Ventilation, Programmed Ventilation
Thisexampleshowsthesysteminprogrammode(denotedbytheschedule15minuteson,5minutesoffandthe
wordRUNinthelowerrightcornerofthedisplay).
TheQuestDEH3000Rwilloperatefreshairventilationaccordingtoyour
ventilationprogram.Thecontrolneedstobeprogrammedtoturnthe
ventilationfunctionONandOFFatthedesiredintervals.Thisisdoneby
programmingtheventilationtimer.
Therearetwoprogramsavailableforventilation:
1.MondaythroughSunday
2.MondaythroughFriday&Saturday/Sunday
Eachblockofdayshasamorningscheduleandanightschedule.Morning
istherst12hoursofthedayandnightisthesecond12hours.
Eachschedulehas:
•A“START”timewhentheventilationschedulebegins,
•An“OPEN FOR”durationfortheamountoftimethedamperstaysopenin5minuteintervals,from0to60,
•And“CLOSED FOR”durationwhichclosesthedamperforaspeciedtimein5minuteintervalsfrom0to60.