Carrier 38AUZ User Manual Page 1

Installation, Start-Up andService InstructionsCONTENTSSAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . 1INSTALLATION GUIDELINES. .

10leads according to required operation of the convenience outlet.If an always-energized convenience outlet operation is desired,connect the source le

11Fig. 9 — Convenience Outlet LocationNon-powered type: This type requires the field installation ofa general-purpose 125-volt 15-A circuit powered fr

12Fig. 11 — Weatherproof Cover InstallationAll Units —Voltage to compressor terminals during operation must bewithin voltage range indicated on unit n

13Table 5 — Electrical Data — 38AUZ*07-14 60 Hz UnitsLEGENDUNITSIZE38AUFACTORY-INSTALLEDOPTIONNOMINALVOLTAGEVOLTAGERANGE*COMPRESSORFAN MOTORS(Qty 2)PO

14PRE-START-UPSystem Check1. Check all air handler(s) and other equipment auxiliarycomponents. Consult the manufacturer’s instructionsregarding any ot

15ADVANCED SCROLL TEMPERATURE PROTECTION(ASTP) — Advanced Scroll Temperature Protection (ASTP)is a form of internal discharge temperature protection,

16Fig. 16 — 38AUZ*07 Charging ChartFig. 17 — 38AUZ*08 Charging ChartFig. 18 — 38AUZ*12 Charging Chart

17Fig. 19 — 38AUZ*14 Charging ChartFig. 20 — 38AU Wiring Diagram

18OPERATING SEQUENCEBase Unit ControlsIndoor (Supply) FanThe indoor fan contactor (IFC) is remotely located at the fancoil or fan section. If the ther

19SERVICEComfort Alert Diagnostic ModuleThe Comfort Alert Diagnostic Module (CADM) monitors andanalyzes data from the Copeland Scroll® three-phase com

2INSTALLATION GUIDELINEReplacement /Retrofit – R22 to Puron®Replacement/retrofit installations require change-out ofoutdoor unit, metering device, and

20Table 6 — LED Status CodesStatus LED Status LED Description Status LED Troubleshooting InformationGreen “POWER” Module has power Supply voltage is p

21Table 7 — CADM TroubleshootingCrankcase Heater — The heater prevents refrigerantmigration and compressor oil dilution during shutdown when-ever comp

22NOVATION™ Coil Cleaning and Maintenance — To clean the NOVATION condenser coil, chemicals are NOTto be used; only water is approved as the cleaning

23Fig. 22 — CoreMax Access Port AssemblyFASTENER TORQUE VALUESTable 8 — Torque ValuesTROUBLESHOOTINGCompressor mounting bolts 65–75 in–lbs (734–847 N–

24TROUBLESHOOTING (cont)PROBLEM SOLUTIONCOMPRESSOR CYCLES ON LOW-PRESSURE SWITCHIndoor-Air Fan Running1. Liquid line solenoid valve(s) fails to open.

25APPENDIXAIR CONDITIONER AND HEAT PUMP WITHPURON® — QUICK REFERENCE GUIDE•Puron® (R-410A) refrigerant operates at 50 percent to70 percent higher pres

Copyright 2009 Carrier Corp • 7310 W. Morris St. • Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 03/09 Catalog No: 38AU-01SIManufacturer

CL-1III. START UPSTART-UP CHECKLISTI. PRELIMINARY INFORMATIONOUTDOOR: MODEL NO. SERIAL NO.INDOOR: AIR HANDLER MANUFACTURERMODEL NO. SERIAL NO. ADDITIO

Copyright 2009 Carrier Corp • 7310 W. Morris St. • Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 03/09 Catalog No: 38AU-01SIManufacturer

3Fig. 1 — 38AUZ*07-14 Unit DimensionsUNITStandardWeightCornerACornerBCornerCCornerDCenter of Gravity Unit Heightlbs. kg. lbs. kg. lbs. kg. lbs. kg. lb

4Table 1A — Physical Data — 38AUZ*07-14 Units — 60 Hz EnglishUNIT SIZE 38AU Z*07Z*08Z*12Z*14NOMINAL CAPACITY (tons)6 7.5 10 12.5OPERATING WEIGHT (lb)A

5Table 1B — Physical Data — 38AUZ*07-14 Units — 60 Hz SIUNIT SIZE 38AU Z*07 Z*08 Z*12 Z*14NOMINAL CAPACITY (kW)21.1 26.4 35.1 44OPERATING WEIGHT (kg)A

6Fig. 2 — Model Number NomenclatureFig. 3 — Serial Number Nomenclature1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 183 8 A U Z A 0 4 A 0G6 – 0 A 0 A 0___

7.INSTALLATIONJobsite SurveyComplete the following checks before installation.1. Consult local building codes and the NEC (NationalElectrical Code) AN

8in the liquid line. Refer to the indoor unit installationinstructions for additional details.Determine equivalent line length adjustments for path an

9Table 4 — Refrigerant Specialities Part Numbers.Fig. 5 — Location of Sight Glass(es)and Filter DriersFig. 6 — Typical Piping Connection AssemblyPress