Honeywell PRESTIGE THX9321 - Screen Cleaning Procedure; Locking the Screen for Cleaning; Safe Screen Cleaning Guidelines

THX9321/9421 Prestige
®
IAQ and RF EIM
25
69-2490—03
Delta T Fault Sensitivity is adjustable in the Installer Setup (ISU 13180)
Delta T diagnostics is only for non-zoned forced air systems.
Alerts and diagnostics
Maintainclosecontactwithyourcustomersbyprovidingmorecomfortandeffi-
ciencywithalertsanddiagnostics.Alertsandreminderscannotifycustomers
whenmaintenanceorserviceisneeded,anddisplayyourcontactinformationto
makeiteasyforthemtoreachyou.Thefollowingareonlyafewofmanyoptions.
Checkthethermostat'son-screenmenusformore.
Alerts and Faults Log
MENU > INSTALLER OPTIONS > DATA LOGS > ALERTS AND FAULTS LOG
Thethermostatsavesthemostrecent25alertsorfaults.Itrecordsthedate,time,
alertstatus(snoozed,dismissed,recovered),anddiagnosticinformationtohelp
youidentifyandcorrectproblems.
User Interaction Log
MENU > INSTALLER OPTIONS > DATA LOGS > USER INTERACTION LOG
Checkthislogtofindoutifaproblemwascausedbyanaccidentalusererror.
Thelogshowsmostchangesmadetothermostatsettings,bytimeanddate,and
describeswhatchangewasmade.
Thethermostatrecordsthemostrecent250changes.Youcanquicklysearch
thembydateandtime,orbyfunction.Thisfeaturecanbeturnedoffifnecessary,
so that no user interactions are recorded.
Examples:
* [date, time] Heattemperaturesetto80°F
* [date, time] SystemmodesettoOff
* [date, time] Installersetupchanged—heatingequipmenttype
Delta T Diagnostics
MENU > INSTALLER OPTIONS > SET UP DIAGNOSTICS
Ifadischargeandreturnairsensorisinstalled,thethermostatcantrack
systemperformanceovertime.Itmeasuresthisas"DeltaT."
Thiscantellyouifthesystemisperformingaboveorbelowexpectedstandards
whichwouldnormallygounnoticed,andmaycauseunnecessaryenergyuse.It
canalsodetectandwarnaboutproblemsearly,beforeheatingorcooling
equipmentfails.
ThethermostatwillmeasureandrecordDeltaTofthesystemforeachstage
youtest.ThisinformationcanbeusedtosettheproperDeltaTfaultlimitsofthe
system.Whenthesystemoperatesoutsidethoselimitsmultipletimes,afaultis
recordedinthelog.Ifconfiguredtodoso,thesystemwillthendisplayanalertto
thehomeowner.
69-2490_B.indd 25 7/13/2011 1:42:01 PM