MasterStat 110423-2 User manual

Installation Instructions
CAUTION: Failure to read and follow all installation and operating instructions could lead to personal injury and/
or damage to property.
CAUTION: All electrical installations must comply with local building and safety codes and must be performed by
qualied personnel only.
System Overview
• Thiscontrolsystemisintendedtobeusedwithanevaporativecoolerwitha2-speedblowerandawaterpump.Itwillalsooperatea
waterpurgepumporvalve,ifequipped.
• Thecontrolisdesignedforfanmotorsupto1HP(120V)or2HP(240V),withwaterpumpandpurgepumpupto2A(120V)or1A
(240V)
• Thefanmotormaybe120Vor240Vrated.
• Thewaterpumpandpurgepumpmotors/valvessharethesameelectricalsupply,ratedfor120Vor240V.
Included in Kit
• WallControlThermostat
• 2-SpeedEvaporativeCoolerControl
• WireNutforcommonEarthconnection.
• Spare3.15Ampfuseforcontrol.
• JumperwireforLinktoN-Link(TobeusedonlywhenbothFanandPumpvoltagesarethesame).
Additional Requirements
Dependingonapplicationandinstallation,thefollowingadditionalitemsmayberequired:
• ScrewsorboltsformountingtheApplianceControlBoxandWallControl
• WiringforconnectionbetweenpowersupplyandApplianceControlBox;WallControlandApplianceControlBox;andbetween
ApplianceControlBoxandthecoolerconnectionbox.
• Conduitandwatertightconnectorstoprotectallwiring.
Installation of the Appliance Control Box
CAUTION: To prevent electrical shock and/or damage to the equipment, disconnect electrical power to the system at
the main fuse or circuit breaker before starting the installation, and leave disconnected until the installation is complete.
1) AfterdeterminingasuitableplacetoinstalltheApplianceControlBox,markthelocationofthethreemountingpoints(withthe
‘TOP’indicationuppermost)anddrillpilotholesforthemountingscrews.
2) Determinewhichknockoutlocationswillbeusedforthesystemwiring.
3) Usingasuitabletool,cutouttherequiredknockouts.Makesureyoucutoutthe
correctsizeholeforyourtting.
4) Mounttheboxusingsuitablescrews.
5) Installconduitandconnections,ensuringawatertightseal,especiallyaroundthe
locationswheretheknockoutswereremoved.
6) Runwiring,inaccordancewithlocalandnationalelectricalcodes,tosuitthe
installation.
7) Connectthewiresinaccordancewiththewiringdiagramonnextpage(wiring
diagramalsolocatedontheinsidelidofApplianceControlbox).
WARNING: Use the jumper wire between Link and NLink only
when fan and pump voltages are the same.
Wall Control Thermostat and 2-Speed Evaporative Cooler
Control System • Model 110423-2

Installation of the Wall Control - cavity wall without outlet box
1) DetermineasuitableplacetoinstalltheWallControl(awayfromsourcesofheat,sunlight,orventilation,and
between4and6feetfromtheoor).Donotinstallnearcooleropening.
2) Usingthemountingplateasaguide,markthelocationofthetwomountingpointsandtheterminalopening
fortheconnectionterminal.
3) Makeaholeinthewalljustlargeenoughtoaccommodatetheconnectionterminalandassociatedwiring.
4) Routeaninsulatedthree-conductorthermostatcable(orsimilarlowvoltagecable)fromtheApplianceControl
Boxthroughthehole,leavingaboutsixinchesprotruding.
5) Routethewiringthroughtheopeninginthewallcontrolmountingplate.Usingwallanchors,screwthe
mountingplatetothewall.
6) Connectthewirestotheterminalsasperthewiringconnectiondiagrambelow.Thesesamewirecolorsmatch
thoseindicatedonthecontrolbox.
7) Plugtheconnectionterminalintothebackofthewallcontrol.Placethetabsonthemountingplateintotheholesinthetopofthe
thermostatandrotatetheWallControluntilitsnapsontothemountingplate.Youmayusetheprovidedscrewtosecureitinplace.
FLO
FHI
Fcom
Link
L1
N
NLink
Pp
Pcom
Pe
Pecom
Fan/Pump 120V
Fan/Pump 240V
Fan 240V
Pump 120V
Fan 120V
Pump 240V
Fan Low
Fan Power Supply Pump Purge
Fan High Fan Common Pump Power Pump Common Purge Power Purge Common
Not
Used
Not
Used
N
N NL2
L1
L2
L1 L1 L1
L2
Ground Connections*
*Note: Use the provided wire nut to connect all ground connections for power
supply, fan, pump, purge pump and cooler cabinet.
Warning: Use jumper between Link and NLink only when Fan and Pump
voltages are the same.
Wiring Connections - Use Copper Conductors
Wiring Connections in Appliance Control Box
ConnectionTerminal
Red
Black
White
MountingPlate
Installation of the Wall Control - using an existing wall-mounted outlet box
CAUTION: Only use a single outlet box and do not share wiring with any other
equipment.
1) Routeaninsulatedthree-conductorthermostatcable(orsimilarlowvoltagecable)fromthe
ApplianceControlBoxtotheoutletbox,leavingaboutsixinchesprotruding.
2) Routethewiringthroughtheopeninginthewallcontrolmountingplate.Screwthemount-
ingplatetotheoutletbox.
3) Connectthewirestotheterminalsasperthewiringconnectiondiagrambelow.These
samewirecolorsmatchthoseindicatedonthe
controlbox.
4) Plugtheconnectionterminalintotheback
ofthewallcontrol.Placethetabsonthe
mountingplateintotheholesinthetopofthe
thermostatandrotatetheWallControluntilit
snapsontothemountingplate.Youmayuse
theprovidedscrewtosecureitinplace.

Operating Instructions
Automatic Operation
The fan and water pump are controlled automatically to achieve the desired comfort level.
Automaticoperationisactivatedbypressingthe‘Mode’buttonuntil‘Auto’isdisplayedontheLCD.The‘Mode’buttonchangesthe
controlbetweenOff,AutoandManual.
TheSettemperature(thetargettemperatureforthecontrol)maybealteredbyrepeatedlypressingorholdingthe‘Up’and‘Down’but-
tons.TheLCDwilldisplay‘Set’ratherthen‘Room’temperatureforashorttimeafterpressingthe‘Up’or‘Down’button.
Onstarting,ifthepadsinthecooleraretoodry,thefanmaybedelayedfromstartinguntilthepadshaveabsorbedsomewater.Thisis
calledPre-Wetandlastsfor2minutes,indicatedby‘Pre-Wet”ashingontheLCD.ThePre-Wetcanbebypassedbyenteringmanual
modebyeitherpressingthe‘Fan’,‘Pump’or‘Mode’buttonandthenpressingthe‘Mode’buttonuntil‘Auto’isdisplayed.
Duringautomaticoperation,thecontrolperformsawaterpurgecycleevery8or12hoursofpumpoperation.Thisintervalcanbe
toggledbetween8or12hoursbysimultaneouslyholdingthe‘Pump’and‘Fan’buttonsfor5seconds.Theselectedintervalisdisplayed
forashorttime.PresstheUporDownarrowbuttonstochangebetween8or12hours.Thisactionalsostartsamanualpurgecycle.A
purgepumporpurgevalve,whichisnotsuppliedwiththethermostatcontrolorevaporativecooler,isrequiredforthisoperation.
Manual Operation
The fan speed and pump are set by the user.
Toactivatethemanualmodefromthe‘Off’state,pressthe‘Mode’buttonuntil‘Manualisdisplayed.Ifthecontrolisinthe‘Auto’
mode,youcanchangetomanualmodebypressingeitherthe‘Mode’,‘Fan’or‘Pump’buttons.Eachpressofthe‘Fan’buttonchanges
thefantoHigh,LoworOff.EachPressofthe‘Pump’buttonchangesthepumpstatuseitherOnorOff.
TheLCDwilldisplay‘Manual’ontheleftandthefanandpumpsettingsontheright.Thefanspeedwillbedisplayedas‘FanHi’or
‘FanLo’.Ifneitheraredisplayedthefanisoff.Withthefanandpumpbothrunning‘Cool’willbedisplayed.Ifonlythefanisrunning
‘Vent’willbedisplayed.Ifonlythepumpisrunning‘Pre-Wet’willbedisplayed.
Time Delay Operation
Delayed start or stop in ‘Auto’ or ‘Manual’ mode
The‘Timer’buttonisusedtosetadelayperiodbetween1and12hoursin1hourincrements.
Ifthecoolerisoperating(in‘Auto’or‘Manual’modes)whenthe‘Timer’buttonispressed,thedelayperioddetermineswhenthecooler
switchesoff.
Ifthecoolerisoffwhenthe‘Timer’buttonispressed,thedelayperioddetermineswhenthecoolerstartsin‘Auto’mode.TheSet
Temperaturewillbethelastsettingwhenrunningin‘Auto’mode.
‘TimerDelay’andtheremainingtimearedisplayedontheLCDwhilethetimerfeatureisactivated.
YoucancanceltheTimerfunctionatanytimebypressingthe‘Timer’button.The‘TimerDelay’indicatorwillnolongerdisplayonthe
LCD.
In the event of a power outage
Ifpowerisinterruptedwhilethecoolerisrunningineither‘Auto’or‘Manual’modethecoolerwillremainoffwhenpowerisrestored.
Thecoolermustbestartedmanuallybypressingthe‘Mode’buttononthewallcontrol.Thethermostatwillrememberthelast‘Set’
temperatureentered.

Trouble Shooting Guide
TheguidebelowisintendedtoaidanInstallerorServiceTechnicianinresolvingsimpleproblems.
CAUTION: To prevent electrical shock and/or damage to the equipment, disconnect electrical power to the system at the main fuse or
circuit breaker before opening the appliance control box, and leave disconnected until after the lid has been shut and secured.
CAUTION: Any testing performed on live conductors must be carried out by qualied personnel only.
Observation Possible Cause Remedial Action
Coolerdoesnot
work/NoLCD
displayonthe
WallControl
Incorrectconnectionofwiring
betweenWallControlandAppliance
ControlBoard
CheckthecorrectconnectionofthethreewiresattheApplianceControlBoard
andWallControl.Ensurethecorrectwiringorderatbothends,andthatthe
terminalsarecorrectlyttedandsecured
PowerSupplyCircuitBreakerOffor
ApplianceControlBoxnotconnected
tothePowerSupply.
ChecktheconditionofPowerSupplyCircuitBreaker.Verifythatthecircuit
BreakerSwitchisOn.
SupplyVoltageshouldbepresentbetweenSupplyL1andSupplyNterminals
ontheApplianceControlBoard.
BlownFuseintheApplianceControl
Box.
ChecktheconditionofFuselocatedontheApplianceControlBoard.Check
forincorrectwiring.Replaceblownfusewiththecorrecttype.
ApplianceControlBoardorWall
Controlfaulty.
SwitchonthePowersupplytotheApplianceControlBox.
MeasuretheDCVoltageattheWallControlbetweentheBlackandRedtermi-
nalswiththeWallControlstillconnected.Ifthemeasuredvoltageisgreater
than3.0VDCandtheLCDremainsblank,theWallControlisatfault.
Ifthevoltageislessthan3.0VDC,disconnecttheredwireandmeasurethe
voltagebetweentheblackandredwire.Ifthemeasuredvoltagerisesto
3.0VDC,theWallControlisfaulty.Ifthemeasuredvoltageremainslow,the
ApplianceControlBoardisatfault.
Water/Purge
Pumpdoesnot
work.LCDon
WallControl
indicatesitis
on.(*)
PoorconnectionofWaterPumptermi-
nalsontheApplianceControlBoard.
VerifythatWaterPumpleadsarecorrectlyconnectedtotheWaterPumpcon-
nectionscrewterminalsontheApplianceControlBoard.
Incorrectconnectionofwiring
betweenWallControlandAppliance
ControlBoard.
VerifythatcolorsofthermostatcablematchthecolordescriptiononAppliance
ControlBoard.Checkthatallwiresarermandsecure.
FanMotor
doesnotwork
/NoFanHigh
and/orFanLow
operation(*)
Pre-Wetcycleisactive CheckLCDdisplayforashingPre-Wetindicatingthefanisturnedoffuntil
pre-wetcycleiscomplete.
PoorconnectiontoFanMotortermi-
nalsontheApplianceControlBoard.
VerifythatFanMotorleadsarecorrectlyconnectedtotheFanHi,FanLo,and
NconnectionscrewterminalsontheApplianceControlBoard.
Incorrectconnectionofwiring
betweenWallControlandAppliance
ControlBoard.
VerifythatcolorsofthermostatcablematchthecolordescriptiononAppliance
ControlBoard.Checkthatallwiresarermandsecure.
PoorconnectionbetweenLinkand
Nlink
Verifythatthejumperwireacross“Link”and“Nlink”isconnectedproperly.
Warning: Use the jumper wire only when fan and pump voltages are
the same.
*Appliance
ControlBoard
DiagnosticTest
TheControlBoardcontainsdiagnosticbuttonsintheupperleftrecessedsection.Followtheinstructionsofthelabello-
catedontheinsideboxcovertodiagnosethedifferentfunctionsoftheboard.Pressingthebuttonswilltesteachfunction
oftheboard.IfallLED’slightduringthetest,thecontrolboardisworkingproperly.Ifnotthecontrolboardisfaulty.