Daikin 668375401 User Manual

Package Contents/Tools Required
Package includes: 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/VDCapplicationsonly;donotuseonvoltagesover30VAC/VDC
• 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
Specifications
Electrical rating: •24VAC/VDC(18-30VAC/VDC)
 •1ampmaximumperterminal
 •4ampmaximumtotalload
Temperature control range: 45°Fto90°F(7°Cto32°C)Accuracy:±1°F(±0.5°C)
System congurations:2-stageheat,2-stagecool
Timing:
BacklightOperation: 13secondsaftermodechangeorbuttonpress
Terminations:-C,+R,W1,Y1,W2,Y2,G,O,S1,S2
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,insertandtwistacoinorscrewdriverintheslotsonthesidesofthethermostat.
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.
8. Alignthermostatbasewithmountingholesandfeedthecontrolwiresthroughwireopening.
9. Usesuppliedscrewstomountthermostatbasetowall.
10. Insertstripped,labeledwiresinmatchingwireterminals.See“WiringDiagrams”sectionofthis
manual.
 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.
15. Testthermostatoperationasdescribedin“TestingtheThermostat”.
Terminal Designator Descriptions
Parts Diagram
R12
W1
Y1 W2 O
S1
S2
668375401
Y2
BacklitDisplay
Reset
CongurationSwitches ModeSwitch FanSwitch
Configuration Mode
ThecongurationmodeisusedtosettheDaikinAuto-changeoverElectronicThermostattomatch
yourheating/coolingsystem. ToconguretheDaikin Auto-changeoverElectronicThermostat ,perform
thefollowingsteps:
1. Removethecoverofthethermostatbygentlypullingononeofthecorners.
2. S imultaneouslyholdtheSW5andSW6buttonsinfor5secondswhiletheDaikin Auto-changeover
ElectronicThermostat isinOFFmode.
3. Pressthe or buttontochangesettingswithineachscreen.
4. Pressthe SW6 buttontoadvancetothenextscreen.
 Note:The SW5 button will return you to the previous screen.
5. Toexitcongurationmode,slidetheModeswitchtoHeatorCool.
FILTER
DIFF
ROOM
SET
REMOTE
Conguration Mode Settings
ThesetupscreensforCongurationModeareasfollows:
1. Heat Pump and Non Heat Pump –Pressthe
or buttontocongureas
heatpump,ornon-heatpumpsystem.Setto“O”forallDaikinWSHP,PTAC,
PTHPandUVunits.
 Pressthe SW6 buttontoadvancetothenextscreen.
FILTER
DIFF
ROOM
SET
REMOTE
2. Setto“g”.
 Pressthe or buttontosetto“g”.
 Pressthebuttontoadvancetothenextscreen.
FILTER
DIFF
ROOM
SET
REMOTE
3. Temperature Scale (F or C) –ChooseFahrenheitorCelsius.
 Pressthe or buttontoselect.
 Pressthe SW6 buttontoadvancetothenextscreen.
 -C–24VAC/VDCcommon
+R–24VAC/VDChot
W1–1ststageheat
Y1–1ststagecool
Remote Sensor Installation (Optional)
Requires Daikin Remote Sensor Part Number 667720401
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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(R12)onthethermostatbycuttingitfromthecircuitboard.
FILTER
DIFF
ROOM
SET
REMOTE
FILTER
DIFF
ROOM
SET
REMOTE
5. 2
nd
StageTemperature Differential (1°Fto6°F)(0.5°Cto3.0°C)
Setthenumberofdegreesbetweenwhenstage1turnsonand
whenstage2turnson.
 Pressthe
or buttontosetdifferentialvalue.
 Pressthe SW6 buttontoadvancetothenextscreen.
FILTER
DIFF
ROOM
SET
REMOTE
FILTER
DIFF
ROOM
SET
REMOTE
4. 1
st
StageTemperature Differential (1°Fto3°F)(0.5°Cto1.5°C)
Setthenumberofdegreesbetweenyour“setpoint”temperature
andyour“turnon”temperature.
 Pressthe
or buttontosetdifferentialvalue.
 Pressthe SW6 buttontoadvancetothenextscreen.
W2–2ndstageheat
Y2–2ndstagecooling
 G–Fan
 O–Override
Wiring Diagram
24 VAC Common
Tenant Override
Fan
Cool 1
Cool 2
Heat 1
Heat 2
Alarm Output
24 VAC
C
O
G
Y1
Y2
W1
W2
A
R
Override (Optional)
Thermostat
Terminals
TB2
MicroTech III Unit Control Board
Low Voltage Terminal Strip (Circuit 1)
Non-Programmable, Auto or Manual Changeover (P/N 668375401)
Two Stage Heat/Two Stage Cool, Night Setback and Override Feature
Note: An additional conductor is required between “O” terminals for the override
feature to work.
Installation, Operation & Application Guide
Version B: 10-15-13
Daikin P/N (668375401)
2 Heat/2 Cool, Auto or Manual Changeover, Hardwired
Non-Programmable Electronic Thermostat
• Configurable
• Two Stage Heat / 2 Stage Cool
Systems
• Backlit Display
• Field Temperature Calibration
• Status Indicator Light
• Relay Outputs (minimum voltage drop
in thermostat)
• Night Set-Back Override
• Reset

Daikin 668375401 Specifications

General

Brand	Daikin
Model	668375401
Category	Thermostat
Language	English