ICM Controls SC1901L General instructions

Installation, Operation & Application Guide
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SC1901L/SC1901VL
Non-Programmable Electronic Thermostat
• ControlsSingleStage
CoolingSystems
• CompatiblewithA/C
Systems
• 30-MinutePowerLoss
MemoryRetention
• Forusewith24VAC
Systems
Important Safety Information
•Alwaysturnoffthethermostatbeforeinstalling,removing,cleaning,orservicing;turnoffthepower
atthemainpowersourcebyunscrewingfuseorswitchingoffcircuitbreaker
•Donotswitchto“Cool”ifroomtemperatureisbelow50°F;thiscoulddamageyourA/Csystemand
causeinjury
•Donotinstallonvoltageshigherthat30VAC
•Allwiringmustconformtolocalandnationalbuildingandelectricalcodesandordinances
•Whilecleaning,donotgetsoapdirectlyonthermostatswitches;onlyuseadampclothwithamild
soaptowipeoutsideofthermostatcover
Specifications
Input:
• Voltage:18-30VAC
Output:
• Maximum:1ampperterminal(2amptotalforallterminals)
TemperatureRanges:
• Temperature control range:45°Fto90°F(7°Cto32°C)Accuracy:±1°F(±0.5°C)
• Differential range:1°Fto3°F(0.5°Cto1.5°C)Accuracy:±1°F(±0.5°C)
• System congurations:Single-stagecool
• Terminations:S1,S2,G,Y,C,R
Note:This thermostat is designed for: Single stage cooling systems. It will retain your setpoint
temperature in memory for up to 30 minutes during a power outage.
Package Contents/Tools Required
Packageincludes:SimpleComfort®non-programmablethermostatonbase,thermostatcover,wiring
labels,screwsandwallanchors,Installation,OperationandApplicationGuide
Toolsrequiredforinstallation:Drillwith3/16”bit,hammer,screwdriver
General Description
• TheSimpleComfort®thermostatisahardwired, digital, mercury-free, non-programmable,
electronic thermostat
• Compatiblewithsingle-stagecooling systems
• Built-in Compressor Protection forairconditioners;toprotecttheA/C’scompressor,thereisa
5-minutedelaybetweenthesystemturningoffandtheA/Cstarting
• 30minutepowerlossmemoryretention
To Install Thermostat
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vefeetabovetheoor.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coolingsystem.MovetheMode switchtoOFF .
2.Toremovecover,insertandtwistacoinorscrewdriverintheslotsonthesidesofthethermostat.
3.MovetheFan switchtoAuto.
4.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).
5.Marktheplacementofthemountingholes.
6.Setthermostatbaseandcoverawayfromworkingarea.
7.Usinga3/16”drillbit,drillholesintheplacesyouhavemarkedformounting.
8.Useahammertotapsuppliedanchorsintomountingholes.
9.Alignthermostatbasewithmountingholesandfeedthecontrolwiresthroughwireopening.
10.Usesuppliedscrewstomountthermostatbasetowall.
 CAUTION! : Besureexposedportionofwiresdoesnottouchotherwires.
11.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.
12.Sealholeforwiresbehindthermostatwithnon-ammableinsulationorputty.
13.Replacecoveronthermostatbysnappingitinplace.
14.Turnonpowertothesystematthemainservicepanel.
To Remove Existing Thermostat
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.
1. Turnoffpowertotheheatingsystembyremovingthefuseorswitchingtheappropriatecircuitbreakeroff.
2. Removecoverofoldthermostat.Thisshouldexposethewires.
3. Labeltheexistingwireswiththeenclosedwirelabelsbeforeremovingwires.
4. Afterlabelingwires,removewiresfromwireterminals.
5. Removeexistingthermostatbasefromwall.
6. Refertothefollowingsectionforinstructionsonhowtoinstallthisthermostat.
Replacing Wiring Labels
Replacetheoldlabelswiththeenclosednewlabels:
Old New Type
F,G G Fancontrolrelay
Y,Y6 Y Coolingcontrol
C Transformer,commonside
M,4,RH,RS,R R Transformer,hotside
C YorC
IftheCterminalisthecoolingcontrol,connecttoYterminal.Ifit
isthecommonsideofthetransformer,connecttoCterminal
N/A S1,S2 Optionalremotesensor
Operation
Setting the Room Temperature (Setpoint Temperature)
Step1:Presstheupordownbutton;thecurrenttemperaturesepointdisplays.
Step2:Presstheupordownbuttonuntilthedesiredtemperaturesepointdisplays.
Thenewtemperaturesettingisautomaticallysaved.After5seconds,thedisplayreturnstoshowing
thecurrentroomtemperature.
Setting a New Temperature Differential
Thedefaulttemperaturedifferentialis1°.Whenyourroomtemperaturevariesby1°F,thethermostat
turnsonyoursystem.Ifyounoticeyoursystemturningonandofftoofrequently,increasethe
temperaturedifferential.
Step1: RemovecoverandpresstheResetbuttononce.
Step2: Fortherst10secondsofoperation,thetemperaturedifferentialisdisplayed.
Presstheupordownbuttontoselectdesiredsetting.
Starting the Thermostat
Step1: MovetheFan switchintotheAutoposition.
Step2: MovetheMode switchtoCool.

A Quick Test
CAUTION! : Donotswitchsystemtocooliftheoutdoortemperatureisbelow50°F(10°C).This
candamagetheairconditioningsystemandmaycausepersonalinjury.
Action: SettheMode switchtoCool.Pressthedownbuttonuntilthetemperaturesettingis3°F
belowtheroomtemperature.
Result:TheA/Csystemandfanshouldturnon.
Action: SettheMode switchtoOff.
Result:TheA/Cshouldturnoff(Theremaybeafandelay).
Action: SettheFan switchtoOn(continuousindoorfanoperation).
Result:Theblowerfanshouldturnon.
Action: SettheFan switchtoAuto.
Result:Theblowerfanshouldturnoff.
Iftheabovetestwassuccessful,youhaveaproperinstallation.
Ifnot:
Doublecheckthatwiresaresecurelyconnectedandareconnectedtotheproperterminals.
Consultthetroubleshootingsection.
Troubleshooting
Symptom Remedy
Thesystemisn’tturningon Checkthewiring,thermostathas5minutetimedelayto
protectthecompressor
LCDisblank Checkwiring,verify24vacispresentatRandCterminals
Thermostatisnotproperly
controllingthefan
Checkwiring,placefanswitchinAutoposition
Thermostatiscontinuouslyturning
onandoff
Increasethetemperaturedifferential
(seeSettingaNewTemperatureDifferential)
Temperaturedisplayisnotaccurate Plugtheholeforwiringbehindthethermostatwithnon-
ammableinsulationtopreventairowintothethermostat
Wiring Diagrams
24VAC T
H
E
R
M
O
S
T
A
T
120VAC
HOT
Transformer
Fan
Control
CoolingOnly
4-Wire,SingleTransformer
R
C
Y
G
S2
S1
Cooling
System
ONE-YEAR LIMITED WARRANTY
TheSellerwarrantsitsproductsagainstdefectsinmaterialorworkmanshipforaperiodofone(1)year
fromthedateofmanufacture.TheliabilityoftheSellerislimited,atitsoption,torepair,replaceorissuea
non-casecreditforthepurchasepricesofthegoodswhichareprovidedtobedefective.Thewarrantyand
remediessetforthhereindonotapplytoanygoodsorpartsthereofwhichhavebeensubjectedtomisuse
includinganyuseorapplicationinviolationoftheSeller’sinstructions,neglect,tampering,improperstorage,
incorrectinstallationorservicingnotperformedbytheSeller.InordertopermittheSellertoproperly
administerthewarranty,theBuyershall:1)NotifytheSellerpromptlyofanyclaim,submittingdatecode
informationoranyotherpertinentdataasrequestedbytheSeller.2)PermittheSellertoinspectandtest
theproductclaimedtobedefective.ItemsclaimedtobedefectiveandaredeterminedbySellertobenon-
defectivearesubjecttoa$30.00perhourinspectionfee.ThiswarrantyconstitutestheSeller’ssoleliability
hereunderandisinlieuofanyotherwarrantyexpressed,impliedorstatutory.Unlessotherwisestated
inwriting,Sellermakesnowarrantythatthegoodsdepictedordescribedhereinaretforanyparticular
purpose.
LIAF021
PatentNo.424,953
7313WilliamBarryBlvd.,NorthSyracuse,NY13212
(TollFree)800-365-5525(Phone)315-233-5266(Fax)315-233-5276
www.icmcontrols.com
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conductorshieldedwiresbetweenremotesensorandthermostat.Shieldedwiremust
beused.Donotrunremotesensorwireinconduitwithotherwires.
 •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
 •ConnecttheshieldingofthewiretotheS2terminalonthethermostat
5. Disablethemainsensoronthethermostatbycuttingitfromthecircuitboard.
Remote Sensor Installation (Optional)
S1 S2 G Y C
CutThermistorfrom
circuitboard
R