Phoenix 1200 - Controls and Maintenance; Make-Up Air Vent; Unit Controls Overview; General Maintenance

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5.3 Make-Up Air Vent
Amake-upairventislocatedunderahoodatthetopofthe
inletlterbox.Whenusedinthespacetobeconditioned,
theventshouldbefullyclosed.Ifthedehumidierisplaced
outsidetheconditionedspace,theventshouldbefully
openedtoallowformake-upairintotheinlet.
6 Controls
6.1 Control Switch (CS)
Thecontrolswitch“CS”isathree-positionswitchequipped
with“HAND/OFF/AUTO”positions.Inthe“HAND”position,
theunitwillruncontinuously.Inthe“AUTO”positiontheunit
willcycleonandoffbasedontheinstalledhumidistat,orif
connected,anexternalcontrol.Inthe“OFF”position,theunit
isoff.
6.2 High/Low Switch
Thehigh/lowswitchisatwopositionswitchwhichallows
partofthereactivationheaterstobeswitchedoffwhen
insufcientpowerisavailableforalltooperate.Normal
operationiswiththeswitchinthe“HIGH”position.
“HIGH”positionfullload:40a@220/1/60.
“LOW”positionfullload:25a@220/1/60.
6.3 Unit Run Light
Thedehumidierisequippedwithagreen“UNITRUN”light.
Thislightwillbeenergizedwhenevertheunitcontrolcontactor
hasbeen“pulledin”toenergizetheunit.Thegreen“UNIT
RUN”lightwillnotbeenergizedwhentheunitisinthe“OFF”
position,orinthe“AUTO”positioniftheinstalledhumidistat
orexternalcontroldeviceisnotenergizingtheunit.
6.4 Humidistat
Thedehumidierisequippedwithaninternalhumidistat
installedintheProcessInlet.Thehumidistatshouldbe
adjusted(byrotatingtheknob)forthedesiredspacehumidity
level.Thehumidistatisastandardqualitymylartypedevice,
accuratetowithin+5%ofsetpoint.Forexternalcontrol,
theinstalledhumidistatmaybedisconnectedperthewiring
diagram,andtheunitsubsequentlyconnectedtoanexternal
controldevice.Aswithanyelectricalwork,theunitshouldbe
de-energizedandlockedoutpriortothestartofsuchwork.
Additionally,checkexternalcontroldevicespecicationsfor
compatibilitywiththedehumidier.
6.5 Electric Reactivation Controls
ThedehumidierisequippedwithPositiveTemperature
Coefcient(PTC)electricreactivationheaters.Theseheaters
areself-regulatingandrequirenoovertemperaturesafety
devicesorotherelectricalcontrols.
7 Dehumidifier Maintenance
Instructions
7.1 General Maintenance
Adenitivetimescheduleshouldbeestablishedfor
inspectingallrotatingpartsandcomponents.Inspection
requirementsdependonthefrequencyofoperation,transport,
andoperatingconditions.Periodicallychecktheconditionof
theairlter,rotatingparts,andfastenerstoensuretheyare
secureandinproperworkingorder.Periodicallycheckairow
tomakesuretherearenoobstructionstoairowinoutletor
inletductwork.
Recommended minimum inspections:
•Uponinstallation
•After1weekofoperation.
•After3months.
•Annuallythereafteroruponlossofperformance.
7.2 Cabinet
Sideaccesspanelsareattachedvia®˘turncamlatchtype
fasteners.Rotatefullycounterclockwisewitha1/8”hex
drivertoreleaselatches.Pullpanelsstraightouttoremove.
CAUTION: Disconnect power before removing access panels.
The condition of the cabinet gaskets should be observed
during inspection and servicing to insure a good seal. Any
leaks must be sealed and panels securely fastened for
proper dehumidifier operation.
7.3 Filter
Themaintenanceintervalforthelterdependsdirectlyon
thecleanlinessoftheairenteringthedehumidier.Itis
suggestedthataprogrambeestablishedtoassurethatthe
ltersarereplacedorcleanedpriortobecomingcloggedto
thepointtheycreateasystemproblem.Thestandardlters
suppliedareofadisposablecartridgetypemedia.Aminimum
30%ASHRAEstandardltermustbeusedtoprotectthe
desiccantmedia.
7.4 Fan and Motor
Fanandmotorbearingsarepermanentlylubricatedanddo
notrequiremaintenance.
Fan wheel-inspectwheelbladesforaccumulationofdust
anddirt.Cleanthoroughlywithcompressedairandor
vacuum.Thewheelshouldnotstrikethehousingortheinlet
ring.Makesurewheelisrotatingintheproperdirection.