Daikin 910121746 General instructions

Specifications
Electrical rating: • 24VAC(18-30VAC)
 • 1ampmaximumperterminal
 • 3ampmaximumtotalload
Temperature control range: 55°Fto90°F(13°Cto32°C)Accuracy:±1°F(±0.5°C)
System congurations:2-stageheat,2-stagecool
Timing: Anti-shortCycle:4minutes(bypassanti-shortcycledelaybyreturningtoOFFmodefor5seconds)
 BacklightOperation:10seconds
Terminations:A,L,S1,S2,R,C,W1,Y1,W2,Y2,G,O
Package Contents/Tools Required
Package includes:910121746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
Important Safety Information
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
• Allwiringmustconformtolocalandnationalelectricalandbuildingcodes
• Donotuseairconditioningwhentheoutdoortemperatureisbelow50degrees;thiscandamageyourA/Csystem
andcausepersonalinjuries
• Usethisthermostatonlyasdescribedinthismanual
Icon Descriptions
Coolingoperationicon
Fanoperationicon
Heatingoperationicon
Roomtemperature
offsetactivated
Parts Diagram
Conguration
switch
Resetswitch
Right(fan)button
Downbutton
Upbutton
S1 S2 R C GY1 W2 Y2
RESET CONFIG
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andcooling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.
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heatingandcoolingsystembyremovingthefuseorswitchingtheappropriatecircuitbreaker
off.
2.Toremovecover,pullgentlyattheseamatthetop.
3.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).
4.Marktheplacementofthemountingholes.
5.Setthermostatbaseandcoverawayfromworkingarea.
6.Usinga3/16”drillbit,drillholesintheplacesyouhavemarkedformounting.
7.Useahammertotapsuppliedanchorsinmountingholes.
TerminalsS1andS2canbeusedforanindoorremotesensor.
Theindoorremotesensorisusedtoreadtheindoortemperature
inadifferentlocation.Thisisbenecialwhenthethermostatisnot
mountedintheideallocation.TheremotesensorP/Nis910116773.
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strandshieldedwirebetweenremotesensorand
thermostat.Shieldedwireisrecommended.
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. Congurethethermostattooperatewiththeremoteindoorsensor(seeCongurationModesetting9).
Remote Sensor Installation (Optional)
Note: Remote or outdoor sensor reading can be
displayed by simultaneously pressing the
Down and SYS buttons.
Remote Sensor:
(Contact Daikin for optional remote sensor.)
8.Alignthermostatbasewithmountingholesandfeedthecontrolwiresthroughslitinthermalintrusionbarrierand
intowireopening.
9.Usesuppliedscrewstomountthermostatbasetowall.
10.Insertstripped,labeledwiresinmatchingwireterminals.

CAUTION! :Be sure exposed portion of wires does not touch other wires.
11. Gentlytugwiretobesureofproperconnection.Doublecheckthateachwireisconnectedtotheproper
terminal.
12.Turnonpowertothesystematthemainservicepanel.
13.Congurethermostattomatchthetypeofsystemyouhave.
14.Replacecoveronthermostatbysnappingitinplace.
15.Testthermostatoperationasdescribedin“TestingtheThermostat”.
1ST Cool 2ND Cool 1ST Heat 2ND Heat
Heat/Cool Y1 YI,Y2 W1 W1,W2
The910121746thermostatiscongurableforallsystems.Thecongurationdirectlyaffectstheoutputs.
Usetheoutputcharttocorrectlycongureandwirethethermostattoyoursystem.
910121746 Output Chart
Configuration Mode
OFF
1. Verifythe910121746isintheOFFmode.
 PresstheSYS(left)buttonuntiloffmodedisplays.
2. Removethecoverofthethermostatbygentlypullingnearoneofthecornersat
thetopofthethermostat.
Toexitcongurationmode,presstheCONFIGswitchfor1second.
Presstheupordownbuttontochangesettingswithineachscreen.
Downbutton
Upbutton
Presstherightbuttontoadvancetothenextscreen.
Note:Pressing the left button will return you to the previous screen. Left
button
Right
button
Thecongurationmodeisusedtosetthe910121746tomatchyourheating/coolingsystem.Tocongurethe
910121746,performthefollowingsteps:
3. PresstheCONFIGbuttonfor1secondwhilethe910121746isinOFF mode.
CONFIG
S1 S2 R C W
O/B GY1 W2 W3Y2
RESET CONFIG
FP
Wiring Diagrams
L
S1
S2
R
C
W1
Y1
W2
Y2
G
A
O
O
G
Y1
Y2
W1
W2
A
R
C
4
3
2
1
5
O
G
Y1
Y2
W1
W2
A
R
C
ICM
Thermostat
Terminal
TB2
TB1
ICM
Thermostat
Terminal
WSHP Main Control Board
Terminals TB1 and TB2
Terminal Designator Descriptions
R–24VAChot
C–24VACcommon
W1–1ststageheat
Y1–1ststagecool
W2–2ndstageheat
Y2–2ndstagecool
 G – Fan
 A – Alarminput
 L – Statusinput
 O – Override/reset
Daikin P/N (910121746)
• Configurable
• 2-Stage Heat/2-Stage Cool Systems
• Large Display With Backlight
• Selectable Fahrenheit or Celsius
• Status Indicator Light
• Relay Outputs
(minimum voltage drop in thermostat)
• Remote Sensor Compatible
Installation, Operation & Application Guide
Version B: 10-15-13
2 Heat/2 Cool, Auto Changeover, Hardwired
Non-Programmable Electronic Thermostat

Configuration Mode Settings
ThesetupscreensforCongurationModeareasfollows:
1. Temperature Scale (ForC)
ChooseFahrenheitorCelsius.
 Presstheupordownbuttontoselect.
 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.
 Presstheupordownbuttontosetdifferentialvalue.
 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satisedsimultaneously.
 1=outputsstagedoffindependently
 0=outputsoffsimultaneously
 Presstheupordownbuttontoset.
 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.
 Presstheupordownbuttontosetdeadbandvalue.
 Presstheright buttontoadvancetothenextscreen.
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.
 Presstheupordownbuttontosetdifferentialvalue.
 Presstheright buttontoadvancetothenextscreen.
6. Maximum Heat Setpoint(55°Fto90°F)(13°Cto32°C)
 Adjusttocontrolthemaximumheatsettemperatureallowed.
 Presstheupordownbuttontoselect.
 Presstherightbuttontoadvancetothenextscreen.
7. Minimum Cool Setpoint(55°Fto90°F)(13°Cto32°C)
 Adjusttocontroltheminimumcoolsettemperatureallowed.
 Presstheupordownbuttontoselect.
 Presstherightbuttontoadvancetothenextscreen.
9. 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congurationbuttonfortwosecondstoexitconguration.
8. 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, will display.
 Presstheupordownbuttontoselect.
 Presstherightbuttontoadvancetothenextscreen.
Mode of Operation
The910121746isanon-programmable,manualorautochangeover,2-stageheat,2-stagecoolthermostat.An
outdoorsensorcanbeusedtomonitortheoutdoortemperature.
Thethermostatactivatestheheatingappliancewhentheroomtemperatureisbelowthesetheattemperature(by
thedifferentialtemperature).The910121746willstopoutputtingwhenthecallforheathasbeensatised.
Whentheroomtemperatureisgreaterthanthesetcooltemperature(bythedifferentialtemperature),thecooling
deviceisactivated.The910121746willstopoutputtingwhenthecallforcoolingissatised.
The910121746hasfourpossibleoperatingmodes:OFF,Heat,CoolandHeat & Coolmode.Inoffmode,the
thermostatwillnotturnonheatingorcoolingdevices.Themanualfancanbeturnedoninalloperatingmodesusing
thefanbutton.Inheatmode,thethermostatcontrolstheheatingsystem.Inthecoolmode,thethermostatcontrols
thecoolingsystem.Inheat&coolmode,thethermostatcontrolsboththeheatingandcoolingsystems.
PressingtheUPandDOWNbuttonssimultaneouslyfor2secondsthenreleasingthemcausesthethermostatto
outputfromthe“O”terminalfor5seconds.“Or”willshowonthedisplay.Thiswillresultintheunitgoingintoanight
set-backoverride.
PressingtheUPandDOWNbuttonssimultaneouslyfor5secondscausesthethermostattooutputfromthe“O”
terminalfor10seconds.“rS”willshowonthedisplay.Thiswillresultintheunitbeingreset.
Button Functions
UP–Usedtoincreasethetime,settemperaturesandtoadjustconguration
settings.
DOWN–Usedtodecreasethetime,settemperaturesandtoadjust
congurationsettings.
SYS (left)– UsedtochangefromOFF,HEAT,COOLandAUTOchangeover
modes
FAN (right)–Usedtoturnonandofftheindoorfan.
DOWN and SYS–Pressedsimultaneouslytodisplayoutdoorremotetemperatureifremotesensoris
connected.
UP and DOWN– Usedtooverridenightsetbackorresettheunit.
FAN
(right)
Down
button
Up
button
SYStem
(left)
Testing the Thermostat
Oncethethermostatiscongured,itshouldbethoroughlytested.
 CAUTION! : Donotenergizetheairconditioningsystemwhentheoutdoortemperatureisbelow50
degrees.Itcanresultinequipmentdamageorpersonalinjury.
Heat Test
1.PressSYS(left)buttonuntilheatmodeisdisplayed.
2.Adjustthesettemperaturesoitis5degreesabovetheroomtemperature.
3.Heatshouldcomeonwithinafewseconds.
4.Adjustthesettemperature2degreesbelowtheroomtemperatureandtheheat
shouldturnoff.Theremaybeafandelayonyoursystem.
Cool Test
1.PressSYS(left)buttonuntilcoolmodeisdisplayed.
2.Adjustsettemperaturesoitis5degreesbelowroomtemperature.
3.A/Cshouldcomeonwithinafewseconds.
4.Adjustthesettemperature2degreesabovetheroomtemperatureandtheA/C
shouldturnoff.Theremaybeafandelayonyoursystem.
Fan Test
1. PressFAN(right)button.Fandisplays.IndoorfanturnsON.
2. PressFAN(right)button.IndoorfanturnsOFF.
OFF
Operating Modes
Therearevepossibleoperatingmodesforthe910121746.Off,Cool,Heat,andCool&Heatmodesareaccessed
bypressingtheSYS(left)button.ProgrammodeisaccessedbypressingtheSYS(left)andFAN(right)buttons
simultaneously.
OFF Mode
• Inthismode,thethermostatwillnotturnontheheatingorcoolingdevices
Note:The indoor fan can be turned on manually in every operating mode by
pressing the FAN (right) button. The word FAN shows on the display and
the fan icon appears when the fan operates. OFF
Heat Mode
• Inthismode,thethermostatcontrolstheheatingsystem.Whentheheatoutputs,
theameicon apprearsonthedisplay.
Cool Mode
• Inthismode,thethermostatcontrolsthecoolingsystem.Whenthecooling
outputs,thesnowakeicon apprears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.
Symptom Remedy
Nodisplay Checkfor24VACatthermostat;displayisblankwhen24VACisnot
present
Allthermostatbuttonsareinoperative Verify24VACispresent;unitlocksoutwhen24VACisnotpresent
Noresponsewithrstbuttonpress Firstbuttonpressactivatesbacklightonly
Thermostatturnsonandofftoo
frequently
Adjusttemperaturedifferential(seeCongurationModeSettings2&3)
Fanrunscontinuously PressFAN(right)buttontoturnfanoff
Statusindicatoron WSHPstatusblinkcode
Roomtemperatureisnotcorrect Calibratethermostat(seeCongurationModeSetting8)
Ifremotesensorisused,checkS1andS2terminalconnections
ondisplayinsteadofroom
temperature
CheckforabadconnectionatS1andS2terminals,ifused
(seeCongurationModeSetting9)
HeatorCoolnotcomingon Verifywiringiscorrect,gentlypulloneachwiretoverifythereisagood
connectionatterminalblock
Alarmlighton Unitinalarmlockoutcondition
Problemnotlistedabove PressResetbuttononce*
* Reset Button Function: Displayisrefreshedandcongurationsettingsareunchanged.
Troubleshooting
Daikin Training and Development
Now that you have made an investment in modern, efficient Daikin equipment, its care should be a high priority. For
training information on all Daikin HVAC products, please visit us at www.DaikinApplied.com and click on Training,
or call 540-248-9646 and ask for the Training Department.
Warranty
All Daikin equipment is sold pursuant to its standard terms and conditions of sale, including Limited Product
Warranty. Consult your local Daikin Representative for warranty details. Refer to Form 933-430285Y. To find your
local Daikin Representative, go to www.DaikinApplied.com.
Aftermarket Services
To find your local parts office, visit www.DaikinApplied.com or call 800-37PARTS (800-377-2787). To find your
local service office, visit www.DaikinApplied.com or call 800-432-1342. This document contains the most current
product information as of this printing. For the most up-to-date product information, please go to
www.DaikinApplied.com.
Products manufactured in an ISO certified facility.
LIAF179-110-15-13