Airxcel Marvair LL357D4 Manuel utilisateur

P/N 01661

Lead/Lag Controller

Model LL357D4

Operational Specifications

• ThermostatRange:45ºFto90ºF(7ºC

to32ºC)

• Accuracy:±1ºF(±½ºC)

• ChangeoverTemperatureDifferential

(separationbetweentheheatset

pointandthecoolsetpoint):2ºFto

9ºF(1.0ºCto4.5ºC)

• FirstStageTemperatureDifferential

(numberofdegreesbetweentheset

pointtemperatureandthe“turnon”

temperature):1ºFto3ºF(.5ºCto

1.5ºC)

• SecondStageTemperatureDifferential

(numberofdegreesbetweenwhen

stage1turnsonandwhenstage2

turnson):1ºFto6ºF(.5ºCto3.0ºC).

• MinimumCoolTemperatureSetPoint:

Adjustablefrom45ºFto75ºF(7ºCto

24.0ºC).

• MaximumHeatTemperatureSet

Point:Adjustablefrom55ºFto90ºF

(13ºCto32.0ºC)

• StagedOFFOutputs:Airconditioners

willturnoffindependently.

Electrical Specifications

• Compatiblewithstandard24-voltAC,

2stageheating/coolingsystems.

• 24Voltcontrol(18to30VAC).

• 1ampmaximumperterminal.

• 4ampmaximumtotalload.

Ease of Use

• Backlightingofthelargedisplay

makestheLiquidCrystalDisplay

(LCD)easytoread.

• Mostfrequentlyusedkeysarelocated

bytheLCDforquick&easyaccessto

information.

• Easyinstallation,setupandsystem

testssavestime.

• Setpointsarepermanentlyheldin

memoryandretainedduringpower

outages-nobatteriesrequired.

• Programmingnotrequired.

• Digitaldisplayshowstemperaturein

°For°C.

• RoomTemperatureOffset:Usedto

calibratedisplayedroomtemperature

withactualroomtemperature

• StatusIndicatorLight:Indicateswhich

stageisrunning.Greenlightmeans

cooling&redlightmeansheating.

Model LL357D4 Lead/Lag Controller

TheMarvair®LL357D4isacompletecontrolpackage

designedtooperateafullyorpartiallyredundantair

conditioningsystem.Itconsistsofatwo-stageheatand

coolelectronicthermostatandasolidstatetimer.It

canbeusedwitheithertheMarvairComPac®Ivertical

packagedwallmountairconditioner,ouruniqueComPac®

IIairconditionerwithbuilt-ineconomizerandmanyofthe

MarvairEnvironmentalControlUnits(ECU).TheLL357D4

providesenvironmentalcontrolandthesecuritydemanded

bythecommunicationshelterindustryforaback-up

unit.Thelead/lagcontrollerinsuresequalwearonboth

airconditionerswhileallowingthelagunittoassistupon

demand.Phasingofairconditionersisnotrequiredfor

properoperation.Theenvironmentallysafe,mercury-freeLL357D4isfactorywired,

testedandmountedinanenclosureforquickinstallation.TheLL357D4whenused

withtheheatpumpadapter,ModelLL357H,providescontrolofredundantheatpump

systems.RefertotheHeatPumpAdapterProductBulletinfordetails.

Specification/Features

LL357D4 PDS 4.2011 rev. 1

LL357D4 PDS, 4.2011 2

Specification/Features (cont'd)

Ease of Installation

• Wiringconnectionsinsensitivetothephasingof

theairconditioners.

• Temperaturesensorbuiltintotheunit(optional

remotesensoravailable).

• Easyterminalconnectionsforthermostatwire.

Timing Device

• Solidstatetimerwithboth3.5and7day

changeovercapability.Timingaccuracy±5%.

• Momentarypushbuttonforaccelerated

manualtimeradvance.(7seconds=7days)

• Lightemittingdiodesindicatepoweronand

identifiestheleadunit.

Enclosure

• 16gaugeappliancewhite,pre-painted

aluminum.

• Provideslowprofilethermostatmounting.

• Openingsincoverfor“LED”indicationofpower

onandforleadunit.

• Doublesasjunctionboxforcontrolwiringtoair

conditioners.

Low Voltage Wiring

1. Allwiringmustcomply

withlocalcodesand

ordinances.

2. Disconnectpowerto

preventelectricalshock

orequipmentdamage.

3. Ondualunits,wire

theairconditioners

accordingtothewiring

detail.

4. Providepowertothe

controller.

NOTE:

• Terminals 5 and 7 on the

ComPac®I & ComPac®II

air conditioner’s terminal

board are dry contacts

which can be used for

remote signalling in the

event of equipment cut-

off on refrigerant pressure

limit.

•For continuous indoor fan

operation, install a jumper

between terminals 8 and

3 and remove jumper

between 1 and 3.

•Also, terminals 8 and 10

can be connected to a

normally closed smoke

or fire detector to cause

equipment shutdown

when the circuit is opened.

(Remove factory jumper.)

LED Operation

•Green (middle light) means

power on to both units.

•Red (left and right lights)

indicates the lead unit.

3 LL357D4 PDS, 4.2011

Sub-base Illustration

Important Safety Precautions

WARNING!:Always turn off power at the main power supply before installing, cleaning, or

removing thermostat.

• Thisthermostatisfor24VACapplicationsonly;donotuseonvoltagesover30VAC

• Donotshortacrossterminalsofsystemcontroltotestoperation;thiswilldamageyourthermostat

andvoidyourwarranty

• Allwiringmustconformtolocalandnationalelectricalandbuildingcodes

• Usethisthermostatonlyasdescribedinthismanual

To Install LL357D4 Thermostat/Controller

ELECTRICAL SHOCK HAZARD – Turn off power at the main service panel by removing the

fuse or switching the appropriate circuit breaker to the OFF position before removing the

existing thermostat.

IMPORTANT:Thermostatinstallationmustconformtolocalandnationalbuildingandelectricalcodes

andordinances.

Note:Mountthethermostataboutfivefeetabovethefloor.Donotmountthethermostatonan

outsidewall,indirectsunlight,behindadoor,orinanareaaffectedbyaventorduct.

1. Turnoffpowertotheheatingandcoolingsystembyremovingthefuseorswitchingoffthe

appropriatecircuitbreaker.

2. Putthermostatbaseagainstthewallwhereyouplantomountit(Besurewireswillfeedthroughthe

wireopeninginthebaseofthethermostat).

3. Marktheplacementofthemountingholes.

4. Usingadrillbit,drillholesintheplacesyouhavemarkedformounting.

5. Alignthermostatbasewithmountingholesandfeedthecontrolwiresthroughwireopening.

6. Usescrewstomountthermostatbasetowall.

7.Insertstripped,labeledwiresinmatchingwireterminals.SeeWiringDiagrams.CAUTION!:Besure

exposedportionofwiresdoesnottouchotherwires.

8.Tightenscrewsonterminalblock.Gentlytugwiretobesureofproperconnection.Doublecheckthat

eachwireisconnectedtotheproperterminal.

LL357D4 PDS, 4.2011 4

9.Sealholeforwiresbehindthermostatwithnon-flammableinsulationorputty.

10.Replacecoveronthermostat.

11.Turnonpowertothesystematthemainservicepanel.

12.Testthermostatoperationasdescribedin“TestingtheThermostat”(Page6).

Remote Sensor Installation (optional)

1. Removecoverfromremotesensorhousing.

2. Selectanappropriatelocationformountingtheremotesensor.

3. Mountremotesensorunitusinghardwareprovided.

4. Installtwowiresbetweenremotesensorandthermostat(useshieldedcablethatisadequately

grounded).

• Wire1shouldrunbetween

theS1terminalonthe

thermostatandtheS1

terminalontheremote

sensor

• Wire2shouldrunbetween

theS2terminalonthe

thermostatandtheS2

terminalontheremote

sensor

5. Disablethemainsensor(R12)

onthethermostatbycuttingit

fromthecircuitboard.

Configuration Mode

TheconfigurationmodeisusedtosettheLL357D4thermostattomatchyourheating/coolingsystem.

TheLL357D4functionswithairconditionerswithelectricheatsystems.

ToconfiguretheLL357D4,performthefollowingsteps:

1. VerifythattheLL357D4isintheOFFmode.PresstheSYS(left)buttonuntilmode

displays.

2. Removethecoverofthethermostatbygentlypullingnearoneofthecornersatthe

topofthethermostat.

3. PresstheCONFIGbuttonforonesecondwhilethethermostatisintheOFFmode.

 UsetheUpandDownbuttonstochangesettingswithineachscreen.

 PresstheRightbuttontoadvancetothenextscreen.

 PresstheLeftbuttontoreturntopreviousscreen.

4. ToexitConfigurationMode,presstheCONFIGswitchfor1second.

Configuration Mode Settings

ThesetupscreensfortheConfigurationModefollow:

1. TemperatureScale(°For°C)

ChooseFahrenheitorCelsius.

 PresstheUporDownbuttontoselectscale.

 PresstheRightbuttontoadvancetothenextscreen.

2. 1st Stage Temperature Differential(1°Fto5°F)(0.5°Cto2.5°C)

Setthenumberofdegreesbetweenyour“setpoint”temperatureandyour“turnon”temperature.

Marvairrecommends2ºF.

 PresstheUporDownbuttontosetdifferentialvalue.

 PresstheRightbuttontoadvancetothenextscreen.

5 LL357D4 PDS, 4.2011

3. 2nd Stage Temperature Differential(1°Fto5°F)(0.5°Cto2.5°C)

Setthenumberofdegreesbetweenwhenstage1turnsonandwhenstage2turnson.Marvair

recommends2ºF.

 PresstheUporDownbuttontoselectdifferential.

 PresstheRightbuttontoadvancetothenextscreen.

4. Staged Off Outputs

Selectwhethertheoutputsforheatingandcoolingarestagedoffindependentlyoraresatisfied

simultaneously.Select“1”,outputsstagedindependently.

 1=outputsstagedoffindependently

 0=outputsoffsimultaneously

 PresstheUporDownbuttontoselect.

 PresstheRightbuttontoadvancetothenextscreen.

5. Minimum Deadband(1°Fto9°F)(1°Cto5°C)

SettheminimumseparationbetweenheatsetpointandcoolsetpointinAutoChangeoverMode.

Marvairrecommends3ºF.

 PresstheUporDownbuttontosetdeadbandvalue.

 PresstheRightbuttontoadvancetothenextscreen.

6. System–Setforheatpump,non-HeatPump(airconditioner),reversingvalveoperationand

numberofcompressorsinyoursystem.Setupfor“Non-HeatPump”andTypeof

Heat“Electric”.

 PresstheUporDownbuttontoselectscale.

 PresstheRightbuttontoadvancetothenextscreen.

 PresstheUporDownbuttontoselect.

 PresstheRightbuttontoadvancetothenextscreen.

7. Auxiliary Delay ON–(0-30minutes)

Setthedelaytimeinminutesforauxiliaryheattobelockedoutafteracallforsecondstage.This

extrasavingsfeatureisusedtotemporarilylockoutauxiliaryheatdevices,allowingjustheat

pumptotrytosatisfyheatcall.Setto0minutes.

 PresstheUporDownbuttontoselect.

 PresstheRightbuttontoadvancetothenextscreen.

8. Lockout(0-8°,COOL-HEAT)

Selectthenumberofdegreessettemperaturecanbechangedduringkeypadlockout.COOL-

HEATlockoutallowsadjustmentofthesettemperaturestothemaximumheatsettemperature

selectedinStep9andminimumcoolsettemperatureselectedinStep10.

 Note:Themodecannotbechangedwhenthethermostatislocked.

 PresstheUporDownbuttontoselect.

 PresstheRightbuttontoadvancetothenextscreen.

Choose System Reversing

Valve Active

Number of Compressors

or Compressor Stages

Type of

Heat

HeatPump

HP O 1

HP b 1

HP O 2

HP b 2

Non-Heat

Pump

Heat Gas

Heat Electric

LL357D4 PDS, 4.2011 6

Configuration Mode Settings (cont'd)

9. Maximum Heat Setpoint(45°Fto90°F)(7°Cto32°C)

 Adjusttocontrolthemaximumheatsettemperatureallowed.Marvairrecommendsamax.heat

 setpointof78ºF(25.6ºC)

 PresstheUporDownbuttontoselect.

 PresstheRightbuttontoadvancetothenextscreen.

10. Minimum Cool Setpoint(45°Fto90°F)(7°Cto32°C)

 Adjusttocontroltheminimumcoolsettemperatureallowed.Marvairrecommendsaminimum

 coolsetpointof68ºF(20ºC).

 PresstheUporDownbuttontoselect.

 PresstheRightbuttontoadvancetothenextscreen.

11. Room Temperature Offset(+9°Fto-9°F)(+4.5°Cto-4.5°C)

 Adjusttocalibratedisplayedroomtemperaturetomatchactualroomtemperature.Note:When

 notsetto0,ºwilldisplay.

 PresstheUporDownbuttontoselect.

 PresstheRightbuttontoadvancetothenextscreen.

12. Temperature Sensor (1-3)

 1.Onlyon-boardsensordeterminesroomtemperature.

 2.Onlyremotesensordeterminesroomtemperature.

 3.Averagetemperatureofon-boardandremotesensor.

 Note:Ifthereisnoremotesensor,option1mustbeselected.

 PresstheUporDownbuttontoselect.

 PresstheRightbuttontoadvancetothenextscreen.

13. Cooling Fan Delay Off Time(0,30,60,90seconds)

 Selectthefanpurgetimeforcooling.Marvairrecommends0seconds.

 PresstheUporDownbuttontoselect.

 PresstheRightbuttontoadvancetothenextscreen.

14. Status Indicator Light (Led0,1,2)

 Marvairrecommends1.

 0=Statusindicatorneveron

 1=Statusindicatoronwithfirststage

 2=Statusindicatoronwithsecondstage

 PresstheUporDownbuttontoselect.

PresstheCONFIGbuttonfor2secondstoexitconfiguration.

7 LL357D4 PDS, 4.2011

Testing the Thermostat

Note: The LL357D4 does not require the units to be in phase.

Procedure: (A/C Testing with LL357D4 Lead/Lag Control for Two Units)

UP-Usedtoincreasethetime,settemperaturesandtoadjust

configurationsettings.

DOWN-Usedtodecreasethetime,settemperaturesandto

adjustconfigurationsettings.

SYS(left)-UsedtochangefromOFF,HEAT,COOLandAUTOchangeovermodes.

RIGHT-Usedtoturnonandofftheindoorfan.

UP, SYS and RIGHT-Heldinsimultaneouslyfor10secondstolockandunlockthethermostat.

DOWN and SYS-Pressedsimultaneouslytodisplayoutdoortemperatureifoutdoorremotesensoris

connected.

1. Setthecoolingtemperatureonthewallthermostattoapointhigherthantheambienttemperature.

Settheheatingtemperaturetoatemperaturethatislowerthantheambienttemperature.Turnthe

selectorswitchtothe“off”position.

2. SetthetimedelayonunitNo.1to“3”minutes,andNo.2to“5”minutes.

3. Setthechangeoversettingoftheenthalpycontroltothe“d”setting(ComPac®IIA/Conly).

4. ProvidepowertoA/Cunitsandturndisconnectson.

5. Checkincomingpowertoeachunit.Forunitsdesignedforoperationon208/230v,60hzpower

supply,thetransformerisfactorywiredfora230powersupply.Fora208powersupplyremovethe

orangeleadfromthetransformerandconnecttheredlead.Insulatetheorangelead.

6. Cooling.UsetheSYSswitchtosetthethermostatto“AUTO”.Slowlylowerthecoolingtemperature

untiltheswitchcloses.Theindoorfanshouldoperateontheleadunit.Oncetheindoorfanturns

on,allowapproximately3to5minutesforthecompressortostart.Notethattheoutdoorfanmay

notcomeonimmediatelybecauseitiscycledbyrefrigerantpressures.Next,lowerthetemperature

untiltheswitchcloses.Followtheaboveproceduresforthelagunit.

 Thegreenlightontheleadlagcontrolshouldbeon.Oneamberlightwillbeontoidentifythelead

unit.Theotherlightshouldbeoff.Ifthelagunitcomesonwiththeleadunitthelightforthelag

unitwillnotcomeon.Youshouldneverhaveall3lightsonatonetime.

 Allowtheunitstorunfor2to3minutesthencheckthetemperaturedifferentialbetweenthereturn

airandthesupplyairwithdigitalthermometer.Thetemperaturedifferentialshouldbebetween12

and20degreesdependingonambienttemperature.

 Next,slowlyraisethecoolingtemperatureuntiltheswitchopens.Thecompressorandoutdoorfan

shouldturnoff.Theindoorfanwillcontinuetorunfor“90”secondsuntilthefanpurgetimesout.

Raisethetemperatureuntiltheswitchopens.Theleadunitwillshutdownaccordinglytothesame

proceduresasoutlinesabove.

 Note:(ComPac®IIA/Conly)Tocheckthesystemoperationunderdifferentambientconditions,

theairtemperatureandenthalpysensorsmustbe“tricked”.Whenoutdoorambientconditions

arehigherthanthecontrolsetting,acomponentcooleraerosolmaybesprayeddirectlyintothe

enthalpysensortostimulatelowenthalpyconditions,causingtheeconomizerdampertoopen.

 Alternately,whenoutdoorconditionsarelowerthanthesetpoint,asourceofheatsuchasahair

dryercanbedirectedontheenthalpysensortosimulatewarmconditions,whichwillbringon

mechanicalcoolingandstartthecompressor.

7.Heating.Slowlyraisetheheatingtemperatureuntiltheswitchcloses.Thefanandelectricalheat

shouldimmediatelycycleon.Theunitshouldstartblowingwarmairin2to3minutes.Next,raise

thetemperatureuntiltheswitchcloses.Followtheaboveproceduresforlagunit.

Holdthemanualadvancebuttoninforninesecondstheleadlaglightsshouldswitch.Next,slowly

lowerthetemperatureuntiltheswitchesopen.Thelagunitshouldshutdownimmediately.Next,

slowlylowerthetemperatureuntiltheswitchopens,theleadunitshouldshutdownimmediately.

8.Replacethermostatcoverandpanelsontheunit.

LL357D4 PDS, 4.2011 8

Mode of Operation

Foranunmannedsite,AutoMUSTbeselectedastheOperatingMode.Sincethecontrolmodulein

theLL357D4doesnothavea"G"input,thefanselectorswitchonthethermostatisnotfunctional.In

normaloperation,thefanandthecompressoroperatesimultaneously.Forcontinuousfanondualunit

installations,installajumperwirebetweenterminals8and3andremovethejumperwirebetween1

and3.Theseterminalsareonthelowvoltageterminalboardintheairconditionercontrolbox.

TherearefourpossibleoperatingmodesfortheLL357D4,Off,Cool,Heat,andCool&Heat(auto-

changeover).ModesareaccessedbypressingtheSYS(left)button.

OFF Mode

•Inthismode,thethermostatwillnotheatorcool.

Heat Mode

•Inthismode,thethermostatcontrolstheheatingsystem.Whentheheatison,the

flameiconappearsonthedisplay.

Cool Mode

•Inthismode,thethermostatcontrolsthecoolingsystem.Whenthetheunitis

cooling,thesnowflakeiconappearsonthedisplay.

Cool and Heat Mode (AutoChangeover)

•Inthismode,thethermostatcontrolsthecoolingandheatingsystems,

automaticallychangingoverfromonetotheotherasneeded.

•Thetimingdisplayalternateswiththesettemperatureevery10secondsinthecool

andheatmode.

Lockout Feature

Thethermostathasabuttonlockoutfeaturesothemodecannotbechangedandthe

temperatureadjustmentislimited.SelecttheappropriatelockoutfromConfiguration

ModeSettings.

ToactivatetheLOCKfeature:

1.SimultaneouslypresstheSYS,RIGHTandUPbuttonsfor10seconds.

2.Thelockouticonwilldisplayandthelockoutfunctionwillbeenabled.

TodeactivatetheLOCKfeature,repeatsteps1and2above.

LL357D4 PDS, 4.2011 9

Troubleshooting

Symptom Remedy

Nodisplay Checkfor24VACatthermostat;displayisblankwhen

24VACisnotpresent.

Indoorblowerdoesnotturnon Verifywiringiscorrect.ChecksettingsinConfigMode,

No.6,“Settings”.

Allthermostatbuttonsareinoperative. Verify24VACispresent;unitlocksoutwhen24VAC

notpresent.

Noresponsewhenfirstbuttonispressed. Firstbuttonpressedonlyactivatesbacklight.

AirconditionersturnsOnandOfftoofrequently

(shortcycles)

Increasetemperaturedifferential.SeeConfigMode,

steps2&3.

Statusindicatorlightdoesnotcomeonduring

callforCoolingorHeating.

Turnstatusindicatorlightfunctionon.SeeConfig

Mode,Step14.

Roomtemperatureisnotcorrect. Calibratethermostat.SeeConfigMode,step11.

Lockiconisdisplayedwhenanybuttonis

pressed.

Thermostathasthelockoutfunctionactivated.See

LockoutFeatureandConfigMode,step8.

ErondisplayinsteadofSEntemperature CheckforabadconnectionatS1andS2terminals.

SeeConfigMode,step12

Airconditionerisnotcoolingorheating. Verifywiringiscorrect.Gentlypulloneachwireto

verifythereisagoodconnectionattheterminalbloc.

Problemnotlistedabove PressResetonce.Timeanddayarereset;

configurationssettingsarenotchanged.

LL357D4 PDS, 4.2011 10

Configuration Mode

ToenterConfigurationmode:

1. VerifythatthethermostatisintheOFFmode.

2. PresstheSYS(left)buttonuntiltheoffmodedisplays.

3. Removethethermostatscoverbygentlypullingononecorneratthetopofthethermostat.

4. PresstheCONFIGbuttonfor1second.

5. Presstheupordownbuttontochangethesettingswithineachscreen.

6. PresstheRIGHTbuttontoadvancetothenextscreen.Presstheleftbuttontoreturntoprevious

Screen

Number Description

Marvair Recommended

Selection Default

1TemperatureScale°For°C Asdesired F

21stStageTemperatureDifferential1°Fto3°F(0.5°Cto1.5°C) 2°F 1°

32ndStageTemperatureDifferential1°Fto6°F(0.5°Cto3.0°C) 2°F 2°

4StagedOffOutputs

1=outputsstagedoffindependently

2=outputsstagedoffsimultaneously

Select111

5MinimumDeadband

2°Fto9°F(1.0°Cto4.5°C)

3°F 5°

6System

Choosefromheatpump,non-heatpump(airconditioner),reversingvalve

andnumberofcompressors.

Select“non-heatpump”and

“Electric”1

GAS

7AuxiliaryDelayOn

Setthetimedelay(inminutes)foraux.heattobelockedoutafteracallfor

secondstage

Setto0minutes.10:00

8Lockout

Selectthenumberofdegreesthatthesettemperaturecanbechanged

duringkeypadlockout.

Asdesired 00

9MaximumHeatingSetpoint

55°Fto90°F(13°Cto232.0°C)

Nohigherthan78°F(25.6°C) 90°

10 MinimumCoolingSetpoint

45°Fto75°F(7.0°Cto24.0°C)

Nolowerthan68°F(20°C) 45°

11 RoomTemperatureOffset

+9°Fto-9°F(+4.5°Cto-4.5°C)

Asdesired 0°

12 TemperatureSensor

1=Onboardtemperaturesensor

2=Onlyremotesensor

3=Avg.temperatureofon-boardsensorandremotesensor

Asdesired 1

13 CoolingfanDelayOffTime

0,30,60,90seconds

0seconds 0

14 Statusindicatorlight

0=statusindicatorneveron

1=statusindicatoronwithfirststage

2=statusindicatoronwithsecondstage

Select1 1

ToexittheConfigurationMode,presstheCONFIGswitchfor1second.

Note:Theredlightindicatestheunit(s)isintheheatingcycleandthegreenlightindicatethattheunit(s)isinthecoolingcycle.

1Settingsandselectionsinitalicsarerequiredsettings/selections.

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