Specifications

3.
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TheunitcontrollershallmonitortheHighPressure
switchandLowPressureswitchseparatelyforeach
refrigerationcircuit.
4. Theunitcontrollershallhavea30secondLow
PressureSwitchbypasswhenitstartsany
compressor.
5. Ahardcompressorlockoutshalloccuriftheunit
controllerdetectsthesameswitchtripthreetimesina
two-hourwindow,whichstartswhenthefirsttrip
occurs.Onthefirstandsecondtrips,theunit
controllerwillturnthecompressoroffandwaitfive-
minutesaftertheswitchrecloses,beforerestartingthe
compressor.
6. Theunitcontrollershallbecapableofoperatingboth
compressorsandtheeconomizerwhenthereisacall
forbothstagesofcooling.
7. Theunitcontrollershallhaveameansoflockingout
mechanicalcompressionbelowaprogrammablelow
ambienttrippoint.Thismustbedonewithoutadding
extracomponentstotheunit.
8. Theunitcontrollershallhaveameansoflockingout
themechanicalcompressionwhentheeconomizeris
operatinginfreecoolingmodewithoutadditional
components.
9. Theunitcontrollershallhaveameansofstartingthe
compressorbeforetheindoorFancomesonwhen
operatingwithaThermostatintheAUTOFANmode.
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EQUIPMENT CONTROL FEATURES
1. Theunitcontrollershallbecapableofcommunicating
ontheStandardOpenprotocol,MODBUSRTU.
2. TheregisterdatafortheMODBUSshallbepublicly
availableandopen.
3. Monitoringsoftwareshallbeprovidedatnocost.The
monitoringsoftwareshallhaveaflashingiconwhen
anyunitwiredtothecomputerhasanalarm.Clicking
theflashingiconshalldisplaythefaultcodeandthe
detailsofthefault.
4. Thenetworkingsetupshallbecompletedby
connectingathree-wiredaisychaincabletoeachunit,
thenpoweringalltheunitsupandpushingabuttonon
eachcontrol.Thereshallnotbeanydipswitchesto
configurethenetworkaddress.
5. Theunitcontrollershalluseacommunicationdriver
thatiscapableofhaving64nodesonthebusbeforea
repeaterisneeded.
6. Theunitcontrollershallusenon-volatilememoryto
storethelastfivealarms.Thereshallbeasingle
buttontopushtorecalltheselastfivealarms.The
alarmsshallbestoredfirstinlastout.Thefirstflash
codeshallbethe
lastalarmthatoccurred.Thereshallbeabutton
presssequencetoclearthealarmsinnon-volatile
memory.
7. Theunitcontrollershallhaveabuttontoreset
compressorlockoutswithoutpoweringtheunitdown.
8. Theunitcontrollershallhaveabuttontoclear
compressorAnti-ShortCycleDelays(ASCDs).When
thisbuttonispresseditwillonlycleartheASCDsfor
onecycleonlyandnotpermanently.
9. TheunitcontrollershallbecompatiblewithanyBAS
(BuildingAutomationSystem).AnyBASshallbeable
tocontroltheequipmentwhenwiredtothecontrol's
ThermostatTerminalStrip.
10. Theunitcontrollershallhaveloadingofatleast25
milliampsonallthermostatinputsforcontrollersand
thermostatsthatuseoutputTRIACs.
11. TheunitcontrollershallhaveaSmokeDetector
Shutdowninputontheboard.Theunitcontrollershall
bepoweredthroughthisinput,sowhentheSmoke
Detectortrips,theunitcontrollerwillshutdownthe
unitimmediately.
12. Theunitcontrollershallhavelowvoltageprotection
forthecontactorsandwillnotenergizeacontactorif
thevoltageisbelow19.2VAC,toinsurecontactor
pull-in.Iftheunitcontrollerhasacompressor
contactorenergizedwhenthevoltagedrops,itshall
notde-energizethecontactoruntilthevoltagedrops
below16VAC,whichisthedropoutvoltageformost
contactors.
13. Theunitcontrollershallhaveameansoflowambient
controlwithoutaddinganyadditionalcomponents.
Theunitcontrollershallhaveameansofcyclingthe
compressoronfor10minutesandofffor5minutesto
defrosttheindoorcoilwhentheoutsideambientis
belowalowambientswitchpointwithoutadding
additionalcomponents.
14. Theunitcontrollershallhaveameansofstoring
compressorruntime.Thisdatashallbeavailable
throughcommunication.Theunitcontrollershallhave
theabilitytoclearthisdatawhenacompressoris
replaced.
15. Theunitcontrollershallhavetheabilitytostorea
nameofatleast26charactersinlength.Theunit
controllerwillleavethefactorywiththeserialnumber
oftheequipmentitisin,storedinnon-volatile
memoryintheNamelocation.
16. Theunitcontrollershallhavetheabilitytostorethe
modelnumberoftheequipmentofatleast26
charactersinlength.Theunitcontrollerwillleavethe
factorywiththemodelnumberoftheequipmentitis
in,storedinnonvolatilememory.
17. Theunitcontrollershallhavetheabilitytostorethe
serialnumberoftheequipmentofatleast26
charactersin
UnitarySalesToolv1.5.8.0 Informationissubjecttochangewithoutnotice.Checklocalcodes. Printed10/20/2014
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SIMPLICITY® Intelli-Comfort II
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