Carrier 38AUZ*07 Series Installation, Start-up And Service Instructions Manual

Contents

15NOTE: TEST LEADS - Unit may be equipped with shortleads (pigtails) on the field line connection points on con-tactor C or optional disconnect switch. These leads are forfactory run-test purposes only; remove and discard beforeconnecting field power wires to unit connection points.Make field power connections directly to line connectionpressure lugs only.Fig. 10 — Disconnect Switch and UnitUnits Without Factory-Installed Disconnect —When installing units, provide a disconnect switch of adequatesize per local or national wiring code. Disconnect sizing data isprovided on the unit informative plate. Locate on unit cabinetor within sight of the unit per national or local codes. Do notcover unit informative plate if mounting the disconnect on theunit cabinet.Units with Factory-Installed Disconnect —The factory-installed option disconnect switch is located in aweatherproof enclosure located under the main control box.The manual switch handle is accessible through an opening inthe access panel.All units -All field wiring must comply with NEC and all local codes.Size wire based on MCA (Minimum Circuit Amps) on the unitinformative plate. See Fig. 11 for power wiring connections tothe unit power terminal block and equipment ground.Provide a ground-fault and short-circuit over-current protectiondevice (fuse or breaker) per NEC Article 440 (or local codes).Refer to unit informative data plate for MOCP (MaximumOver-current Protection) device size.Fig.11 — Power Wiring ConnectionsTable 10 — American/European Wire ConversionsAll field wiring must comply with the NEC and localrequirements.Affix the crankcase heater warning sticker to the unitdisconnect switch.Convenience Outlets —Two types of convenience outlets are offered on 38AU models:Non-powered and unit-powered. Both types provide a 125-voltGFCI (ground-fault circuit-interrupter) duplex receptacle ratedat 15-A behind a hinged waterproof access cover, located onthe end panel of the unit. See Fig. 12.FIRE HAZARDFailure to follow this warning could result in intermittentoperation or performance satisfaction.Do not connect aluminum wire between disconnect switchand condensing unit. Use only copper wire.(See Fig.10.)COPPERWIRE ONLYELECTRICDISCONNECTSWITCHALUMINUMWIREAMERICAN EUROPEANIndustryStandard SizeAmericanConversion (mm 2 )EuropeanStandard Size (mm 2 )20 AWG 0.52 0.518 AWG 0.82 1.016 AWG 1.30 1.514 AWG 2.08 2.5ELECTRICAL OPERATION HAZARDFailure to follow this warning could result in personalinjury or death.Units with convenience outlet circuits may use multipledisconnects. Check convenience outlet for power statusbefore opening unit for service. Locate its disconnectswitch, if appropriate, and open it. Tag-out this switch, ifnecessary.11 13L1 L2 L3C TB1208/230-3-60460-3-60575-3-60Units Without Disconnect OptionUnits With Disconnect Option246135L1L2L3OptionalDisconnectSwitchDisconnect factory test leads; discard.FactoryWiringDisconnectperNEC