Airtechnic Tca2 User manual

ΘΕΡΜΟΣΤΑΤΗΣ

V. 4

ModBus Fan Coil Thermostat

TCA2

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TCA2ModbusFancoilThermostat

￭Application

TheTCA2SeriesTouchScreenFanCoilThermostatscontrolthefan

coilwithlocaltemperaturetogetcomfortableenvironment.Selectthe

temperaturescalesandsetpoints,themodes,andthedifferentvalues

tocontroltheHeating,Ventilating,andAirConditioning(HVAC)system,

maintainthedesiredroomtemperature.Theoptional

Occupied/Unoccupiedfeaturesavesenergy.

TCA2featureswithmicrocomputercontrol,largeLCDscreendisplay,

anddisplaysthestatusofworkmode(cooling/heating/vent),fanspeed,

indoortemperatureandsettemperatureetc...Capacitancetouch

screenenhancesthefluencyonoperation.Keypadincludes:Power

on/off( ),Modeselection(M),FanSpeedselection( ),

Clock/Timer( )andtwoadjustmentbuttons( ＆)

￭Installation

InstalltheTCA2wheretheoccupantcanreadthedisplayandadjustthesetpointeasily.Situatethethermostatwherethetemperatureisrepresentativeofthegeneralroom

conditions.Avoidinstallingnearcoldorwarmairdrafts,radiantheat,onanoutsidewall,orindirectsunlight.

￭Mounting

MounttheTCA2Seriesthermostattoa75x75x5mmstandardelectricalwallbox.(SeeFigure3)

FollowtheinstructioninRemovingtheBaseandthenproceedtotheWallMountingandtheWiringsections.

Note:AllTCA2SeriesmodelsrequiretwoNo.Mx5mountingscrews(Includeinthebox,screwPWT.5X5X5.5isrequiredifmissing).

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Figure 2: Installation diagram

Note:WhenwiringtheTCA2SeriesThermostatusewirenutstofinishandisolateeachconnection,wireaccordingtoFigure3.

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￭Instructions

•On/OffSetting:Press“ ”toturnon,pressagaintoturnoff,closethefanandvalve.

•ModeSelection:Press“M”tochangetheworkingmode,“ ”forCooling，“ ”forHeating,“ ”forventing.(key“M”isunavailableunderautomode.Whensettingtemperatureis

morethan1℃higherthanindoortemperature,themodewillchangetoheatingautomatically,Whensettingtemperatureismorethan1℃lowerthanindoortemperature,themode

willchangetocoolingautomatically.)

•TemperatureSetting:Presseither“ ”or“ ”buttontoincreaseordecreaseby1

℃.

•FanSpeedAdjustment:

CoolingorHeatingModeOperation

TCA2,has4speedsfancontrol:Auto “ ”、High“ ”、Middle“ ”、Low“ ”fan.Shortpressthe“ ”buttonswitchesthroughthesequence.

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TCA2,has3speedsfancontrol: High“ ”、Middle“ ”、Low“ ”fan.Shortpressthe“ ”buttonswitchesthroughthesequence.

Note:FanstopsatFloorHeatingMode.

•TimeAdjustmentandTime‐On/OffOperation:

TimeAdjustment:Continuouslypress“ ”buttonuntil“mm”in“hh:mm”blinks,thenpress“ ”or“ ”toadjusttheminute.Press“ ”buttonagainuntil“hh”in“hh:mm”

blinks,thenpress“ ”or“ ”toadjustthehour.Press“ ”buttonagainandadjusttheweekdaybythesamemethod.

Time‐On/OffOperation:Continuouslypress“ ”buttonuntilthe“hh:mm”，“ ”,“ON”appear,and“ ”，“ON”blink.Presseither“ ”or“ ”keytoadjusttheTime‐Onby

30minutes.Press“ ”buttonagainuntil“ ”，“OFF”blink.ThenadjusttheTime‐Offbythesamemethod.Time‐On/Offsettingperformsonlyoncewithinoneday.

Time‐On/OffCancel:Cancel:Continuouslypress“ ”buttonuntilthe“hh:mm”,“ ”,“ON”appear,and“ ”，“ON”blink.Presseither“ ”or“ ”keytoadjusttheTime‐On

“00:00”.Press“ ”buttonagainuntil“ ”，“OFF”blink.ThenadjusttheTime‐Of“00:00”bythesamemethod.

•Lockfunction:

Lockfunction:IfLockfunctionisenabled,thethermostatwillbelockedautomaticallyafter30secondsunused.

Unlockfunction:Holddownthefankey3secondstounlock.

•TimerFunction:

Onpoweronstatus,holdthe“ ”buttonfor3secondstoentertheTimerinterface,wherethethermostat’saccumulatedrunningtimeisshowing.

Onpoweroffstatus,holdthe“ ”buttonfor3secondstoentertheTimerinterface,accumulatedrunningtimecanbeclearedbypressing“ ”.

OnpowerOffstatusandwhenroomtemperaturelowerthan5℃,heatfunctionwillbeautomaticallyswitchedon,“ ”appears,theelectricallyoperatedvalvesisopenedon

•StandbyFunction:

Thethermostatwillchangetostandbyafter30secondsnopressed,andbacklightbecomesslightlybright.Quitthestandbyinterfacebypressinganykeyandbacklightbecomesnormal

again.

Parameter Setting:

Onpoweroffstatus,holdthe“ ”and“ ”keysfor3secondstoenterparametersettinginterface.Press“M”keytoselecttheparameter,andthenadjustitby“ ”or“ ”key.

Settingtableisasfollowing:(notetooperateslowly, especiallykeepover1secondintervalbetweeneach“M”keypressing)

￭ Troubleshooting

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•FaultAlarm

Whenthesensorisinfault,thermostatwillclosethefanandvalve,anddisplay,“E1”,“E2”

E1:Sensorshortcutalarm

E2:Sensorcircuitbreakeralarm

Display“HI”,temperature＞55℃；display“LO”,temperature＜0℃

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WARNING:

•Disconnectpowersupplybeforemakingelectricalconnections.Contactwithcomponentscarryinghazardousvoltagescancauseelectricalshockandmayresultinseverepersonalinjuryordeath.

•RiskofElectricalShock

  Groundthethermostataccordingtolocal,national,andregionalregulations.Failuretogroundthethermostatmayresultinelectricalshockandseverepersonalinjuryanddeath.

•RiskofElectricalShockandPropertyDamage

  Insulateandsecureeachunusedwireleadbefore  applyingpowertothethermostat.Failuretoinsulateandsecureeachunusedwireleadmayresultpropertydamage,electricalshock,andsevere

personalinjuryordeath.

IMPORTANT:

•UsethisTCA2SeriesLineVoltageFanCoilThermostatonlyasanoperatingcontrol.WherefailureofmalfunctionoftheTCA2SeriesThermostatcouldleadtopersonalinjuryorpropertydamagetothe

controlledequipmentorotherproperty,additionalprecautionsmustbedesignedintothesystem.Incorporateandmaintainotherdevicessuchassupervisoryoralarmsystemsorsafetyorlimitcontrols

intendedtowarnof,orprotectagainst,failureormalfunctionoftheTCA2SeriesThermostat.

•Donotinstallthisthermostatincondensing,wet,ordampenvironments.

  Moisturemaycausedamagetothethermostat.

•DonotremovePCBformtheenclosurecover.RemovingthePCBfromtheenclosurecovervoidstheproductwarranty.

•Makeallwiringconnectionsinaccordancewithlocal,nation,andregionalregulations,DonotexceedtheTCA2Seriesthermostat'selectricalratings.

FanonlyOperation