How to Reset a Carrier Air Conditioner Unit. Exact instructions will vary depending on your model of Carrier air conditioner. Air conditioners may need resetting in the event of a software problem. Step 1 Locate the 'Reset' button on the air conditioner's control panel. The button is sometimes very small but usually is labeled.
ServiceInstructions
Page
INSTALLATION............................1-31
•ROOFCURB
Step2—RigandPlaceUnit.................8
•ROOFMOUNT
Step4—MakeUnitDuctConnections .......11
Step6—ControlsOptions..................12
•VARIABLEAIRVOLUME(VAV)
Step7—MakeElectricalConnections.......15
•FIELDPOWERSUPPLY
Step8—MakeOutdoor-AirInlet
•ECONOMIZER
Step9—PositionPowerExhaust/
Step10—InstallAccessories...............30
SERVICE..................................42-45
START-UPCHECKLIST...............CL-1,CL-2
Installationandservicingofair-conditioningequipment
canbehazardousduetosystempressureandelectricalcom-
ponents.Onlytrainedandqualifiedservicepersonnelshould
install,repair,orserviceair-conditioningequipment.
tionsofcleaningcoilsandfiltersandreplacingfilters.All
otheroperationsshouldbeperformedbytrainedserviceper-
serveprecautionsintheliterature,tagsandlabelsattached
Followallsafetycodes.Wearsafetyglassesandworkgloves.
Usequenchingclothforunbrazingoperations.Havefireex-
Beforeperformingserviceormaintenanceoperationson
couldcausepersonalinjury.
IMPORTANT:Duetoupgradesinunitcontrolsoft-
differentthanoriginaldesignunits.Theunitcontrol
ontheunitcontrolboard,chipU8(thelargechipin
sionnumber.Version1.0istheoriginalversion.Ver-
lation,configuration,andstart-upproceduresinthis
INSTALLATION
Allpanelsmustbeinplacewhenrigging.Unitisnot
ROOFCURB—Assembleandinstallaccessoryroofcurb
inaccordancewithinstructionsshippedwiththecurb.Ac-
cessoryroofcurbandinformationrequiredtofieldfabricate
Installinsulation,cantstrips,roofing,andcounterflashing
issetinplace.
curbiscriticalforaleak-proofseal.Installgasketsup-
erlyappliedgasketcanresultinairleaksandpoorunit
Curbshouldbelevel.Thisisnecessarytopermitunitdrain
Fig1and2.RefertoAccessoryRoofCurbInstallationIn-
structionsforadditionalinformationasrequired.Whenac-
B,orCroofcoveringmaterial.
cannotbeused,supportunitwithsleepersusingunitcurbor
adaptersupportarea.Ifsleeperscannotbeused,supportlong
equallyspaced4-in.x4-in.padsasfollows:
50EJ,EK,EW,EY038-048require4padsoneachside.Unit
50EJ,EK,EW,EY024-048
ElectricCoolingwithElectricHeatOption
Manufacturerreservestherighttodiscontinue,orchangeatanytime,specificationsordesignswithoutnoticeandwithoutincurringobligations.
Tab1b
PC111CatalogNo.535-006PrintedinU.S.A.Form50E-3SIPg18-96Replaces:50E-1SI