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Carrier 48/50AJ specifications a48-8402, and 27 Ton MCHX CIRCUIT A Charging Chart

Models: 48/50AJ

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25 and 27 Ton MCHX CIRCUIT A Charging Chart

				25 and 27 Ton MCHX CIRCUIT A Charging Chart
					All Compressors on a Circuit Must be Operating
						All Outdoor Fans Must be Operating
	150												S S T= 5 5 F
													S S T= 5 5 F
	145												S S T= 4 5 F
													S S T= 4 5 F
F)	140												S S T= 3 5 F
F)				Reduce Charge if Above Curve									S S T= 3 5 F
(deg	135			Reduce Charge if Above Curve
	135
re	130
re	125
tu	125
tu
Tempera	120
	120
	115
ing	110
ing	105
s									Add Charge if Below Curve
Conden	100								Add Charge if Below Curve
Conden

	95
ted	90
ted	85
tura	85
tura	80
Sa	75
	75
	70
	55	60	65	70	75	80	85	90	95	100	105	110	115	120	125

Outdoor Air Temperature (deg F)

				25 and 27 Ton MCHX CIRCUIT B Charging Chart
					All Compressors on a Circuit Must be Operating
						All Outdoor Fans Must be Operating
	150
	145
F)	140													S S T= 5 5 F
	140													S S T= 4 5 F

(deg
(deg	135													S S T= 3 5 F
ure	130
ure	125			Reduce Charge if Above Curve
Temperat				Reduce Charge if Above Curve
Temperat	120
	120
	115
ing	110
ing	105								Add Charge if Below Curve
Condens									Add Charge if Below Curve
Condens	100
	100
	95
ated	90
ated	85
tur	85
tur	80
Sa	75
	75
	70
	55	60	65	70	75	80	85	90	95	100	105	110	115	120	125

Outdoor Air Temperature (deg F)

LEGEND

a48-8402

MCHX— Microchannel Heat Exchanger

SST — Saturated Suction Temperature

Fig. 45 — Charging Chart — 48/50A2,A3,A4,A5025 and 027 with R-410A Refrigerant

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Image 134

Carrier 48/50AJ specifications a48-8402, and 27 Ton MCHX CIRCUIT A Charging Chart, and 27 Ton MCHX CIRCUIT B Charging Chart

Contents

Multi-StageConstant Volume Units with CONTENTSTwo-StageConstant Volume Units with APPENDIX A — LOCAL DISPLAY TABLES . . . . CONTENTS contSAFETY CONSIDERATIONS APPENDIX D - MODE SELECTIONTable 1 — A Series Product Line GENERALBASIC CONTROL USAGE Fig. 2 — Accessory Navigator Display Fig. 1 — Scrolling MarqueeFig. 3 — System Pilot User Interface ComfortLink Display Modes START-UP AIRFLOW Table 6 — Fan Performance — 48AJ,AK036 Units Table 8 — Fan Performance — 48AJ,AK041 Units Table 10 — Fan Performance — 48AJ,AK051 Units AIRFLOW AIRFLOW Table 15 — Fan Performance — 50AJ,AK036 Units Table 17 — Fan Performance — 50AJ,AK041 Units Table 19 — Fan Performance — 50AJ,AK051 Units AIRFLOW CFM 4,000 5,000 6,000 7,000 7,500 8,000 Table 24 — Fan Performance — 48AW,AY036 Units Table 26 - Fan Performance - 48AW,AY041 Units Table 28 — Fan Performance — 48AW,AY051 Units 4.81 0.62 Table 33 — Fan Performance — 50AW,AY036 Units Table 35 — Fan Performance — 50AW,AY041 Units Table 37 - Fan Performance - 50AW,AY051 Units Table 39 — Motor Limitations CONTROLS QUICK START figure the unit, perform the following SERVICE TEST Indoor Air Quality IAQ OptionsFans in Service Test Mode — Upon entering the THIRD PARTY CONTROL Demand Controlled Ventilation Control —CONTROLS OPERATION Table 42 — Operating Modes Display Table SYSTEM MODES Operating Modes→SYS.MSystem Fig. 4 — Mode SelectionFire SmokeC.TYP = 1 VAV-RATand C.TYP = 2 VAV-SPT •MAT.S = Table 43 — Unit Configuration•MAT.S = MAT.S =under Configuration→UNIT →SA.S.R Table 44 - Machine Dependent ConfigurationsTable 46 — Supply Air Reset Configuration Table 45 — SetpointsTable 47 — Cooling Configuration Fig. 6 — Recommended Minimum Cool-Down Fig. 5 — Advanced Scroll TemperatureProtection Label Time After Compressor is StoppedFig. 8 — Cool Mode Evaluation •Lo Cool Mode mechanical stages = Table 49 — 2-StageSequence — 48/50AJ,AW020-027 Table 50 — 2-StageSequence — 48/50AJ,AW030-060Table 55 — 2-StageSequence — 48/50A2,A4020-027 Table 56 — 2-StageSequence — 48/50A2,A4030-060STAGE Table 61 - Run Status Mode Trip Helper Z.MIN = Configuration→COOL→Z.GN * –10+Z.PLU = Configuration→COOL→Z.GN * 10 + R.PCT = MAT – EDT/ C.CAPTable 62 — Run Status Cool Display •MAT.S = Inputs→GEN.I→DL.S1 Inputs→GEN.I→DL.S2•MAT.S = •MAT.S =Table 63 - Demand Limit Configuration •Configuration→COOL→M.M. – Motor Master Control?Table 64 — Condenser Fan Staging EC.C.P = Setpoints→SA.LO + Inputs→RSET→SA.S.RTable 65 — Heating Configuration Fig. 9 — Heating Offsets Table 66 — Heat/Cool Set Point OffsetsError = HT.C.P – LAT Table 67 — Mode Trip Helper TableTable 68 — Staged Gas Configuration Table 69A — Staged Gas Heat — 48AJ,AK,AW,AY UnitsTable 69B — Staged Gas Heat — 48A2,A3,A4,A5 Units Table 74 — IGC LED Indicators •For all other cases, the trip point is T.V.UN Table 75 — Static Pressure Control Configuration Fan Status Monitoring Table 78 - Dirty Filter Switch Points Table 76 — Static Pressure Reset Related PointsTable 77 - Fan Status Monitoring Configuration E.SEL = Fig. 10 — Psychrometric Chart forInputs→GEN.I→E.SW Enthalpy ControlTable 79 — Economizer Configuration Table Fig. 11 — Custom Changeover Curve ExampleC.TYP = C.TYP =C.TYP = C.TYP =Table 80 — Economizer Run Status Table Table 81 — Building Pressure Configuration Table 82 — Power Exhaust Staging BP.CF =Table 83 — Power Exhaust Staging BP.CF = RELEVANT ITEMS Fig. 12 — IAQ Control Point Configuration→IAQ→AQ.SP→D.F.ON. The fanPoint Configuration→IAQ→AQ.SP→D.F.OF. The con Fig. 13 — IAQ Response CurveIAQ Purge Configuration → IAQ → IAQ.P → IQ.PG— Table 84 - Indoor Air Quality Configuration Table 85 — Dehumidification ConfigurationTemperature Compensated Start — This logic is Carrier Comfort Network CCN System - ItTable 86 — CCN Configuration Table 87 — Alert Limit Configuration Table 88 - Sensor Trim ConfigurationDiscrete Switch Logic Configuration — The SW.LG TIME CLOCK CONFIGURATION Table 92 — Remote Switch Logic Configuration TROUBLESHOOTING Table 94 — Cooling Service Analysis Table 94 — Cooling Service Analysis cont Table 95 — Gas Heating Service Analysis Table 96 — Electric Heat Service AnalysisFig. 14 — IGC Service Analysis Logic A48-5656TEMP TEMP TEMP 48/50AJ,AK,AW,AY Units Only 48/50AJ,AK,AW,AY Units Only PRESSURE 48/50A2,A3,A4,A5 Units Only 48/50A2,A3,A4,A5 Units Only cont Y.PLU = –ADD.R*0.4375 R.PCT = MAT - EDT/C.CAPY.MIN = -SUB.R*0.4375 Z.MIN = Configuration→COOL→Z.GN * –10+ Table 105 — Auto View of Run Status Display TableTable 106 - Economizer Run Status Display Table Z.PLU = Configuration→COOL→Z.GN * 10 +Table 109 — CCN/Linkage Display Table Table 107 — Cooling Information Display TableTable 108 — Mode Trip Helper Display Table Table 110 — Compressor Run Hours Display TableTable 112 — Time Guard Display Table Table 114 — Alert and Alarm Codes Table 114 — Alert and Alarm Codes cont A051 Circuit A, Compressor 1 Stuck On Failure T092 Circuit A Suction Pressure Transducer Failure Demand Limit Select Configuration→DMD.L→DM.L.S T303 Supply Temperature Above Limit— If the supply at Configuration→UNIT→SENS→FLT.S Factory-InstalledComponents MAJOR SYSTEM COMPONENTSTO NEXT PAGE RED JUMPER WIRE MUST BE ADDED~ ~ ~ ~ ~ ~~ a48-8355a48-8355 a48-8355 A48-7294 ~ ~ ~ ~ ~ ~ ~~ ~~ ~~ ~ TO NEXT ~PAGE~~~~ a48-8356a48--8357 TO NEXT PAGE A48-7296A48-8358 a50-8228 A48-7298 TO NEXT PAGEFROM PREVIOUS PAGE a48-8360Page SW1 SW2 OR DEHUMIDIFY SWITCH a48-8361a48-8362 A48-7302 LEGEND AND NOTES FOR FIG. LEGENDFig. 26 — Main Base Board MBB A48-7811POINT Fig. 28 — Staged Gas Heat Control Board SCB A48-7707CEBD430351 Fig. 29 — Controls Expansion Board CEMCEPL130351 TESTFig. 30 — Scrolling Marquee Table 119 — Controls Expansion Board CEM InputsTable 120 — IGC Board Inputs and Outputs Fig. 31 — VFD Wiring Table 121 — VFD Terminal DesignationsW2 G TB5 TB6Table 122 — Field Connection Terminal Strips Fig. 34 — Accessory Navigator Display Fig. 35 — CCN System Architecture Fig. 36 — Door Latch SERVICEFig. 37 - Spark Gap Adjustment Fig. 38 — Typical Gas Heating SectionFig. 39 — Gas Heat Section Details Fig. 40 — Evaporator-FanAlignment and Adjustment LubricationEvaporator-FanMotor Replacement Evaporator Fan Service and ReplacementBelt Tension Adjustment — To adjust belt tension Fig. 42 — Belt Tension AdjustmentFig. 43 — Condenser-FanAdjustment Condenser-FanAdjustmentGas Valve Adjustment Table 123 - Round Tube, Plate Fin Unit Chargea48-8401 25 and 27 Ton MCHX CIRCUIT B Charging Chart a48-840225 and 27 Ton MCHX CIRCUIT A Charging Chart 30 Ton MCHX CIRCUIT A Charging Chart 30 Ton MCHX CIRCUIT B Charging Chart35 Ton MCHX CIRCUIT A Charging Chart 35 Ton MCHX CIRCUIT B Charging Chart40 Ton MCHX Charging Chart 50 Ton MCHX Charging Chart60 Ton MCHX CIRCUIT A Charging Chart 60 Ton MCHX CIRCUIT B Charging ChartFig. 51 — Gas Valve Part Number EF33CW271 Fig. 52 — Main Burner RemovalAPPENDIX A — LOCAL DISPLAY TABLES MODE — RUN STATUSMODE — TEMPERATURES APPENDIX A - LOCAL DISPLAY TABLES contMODE — SERVICE TEST MODE — RUN STATUS contMODE — SET POINTS APPENDIX A — LOCAL DISPLAY TABLES contMODE — PRESSURES MODE — INPUTSMODE — INPUTS cont MODE — CONFIGURATIONAPPENDIX A — LOCAL DISPLAY TABLES cont MODE — OUTPUTSAPPENDIX A — LOCAL DISPLAY TABLES cont MODE - CONFIGURATION contDEFAULT ITEMAPPENDIX A — LOCAL DISPLAY TABLES cont →BP.CFAPPENDIX A — LOCAL DISPLAY TABLES cont →CCNAMODE — TIME CLOCK MODE — ALARMSAPPENDIX A — LOCAL DISPLAY TABLES cont MODE - OPERATING MODESAPPENDIX B — CCN TABLES STATUS DISPLAY TABLESAPPENDIX B - CCN TABLES cont STATUS DISPLAY TABLES contTABLE APPENDIX B — CCN TABLES contSTATUS DISPLAY TABLES cont APPENDIX B — CCN TABLES cont CONFIG TABLESSET POINT TABLE APPENDIX B — CCN TABLES cont CONFIG TABLES contSERVICE-CONFIGTABLES SERVICE-CONFIGTABLES cont APPENDIX B — CCN TABLES contTABLE SERVICE-CONFIGTABLES contAPPENDIX B — CCN TABLES cont APPENDIX B — CCN TABLES cont SERVICE-CONFIGTABLES contDEFAULT TABLEMAINTENANCE DISPLAY TABLES APPENDIX B — CCN TABLES contDISPLAY NAME MAINTENANCE DISPLAY TABLES contAPPENDIX B — CCN TABLES cont RANGETABLE MAINTENANCE DISPLAY TABLES contAPPENDIX B — CCN TABLES cont TABLE MAINTENANCE DISPLAY TABLES contAPPENDIX B — CCN TABLES cont APPENDIX B - CCN TABLES cont TIME SCHEDULE CONFIG TABLEMAINTENANCE DISPLAY TABLES cont Table A — VFD Terminal Designations Fig. A — VFD WiringAPPENDIX C - VFD INFORMATION Fig. B — VFD Keypad Table B — VFD ConfigurationsAPPENDIX C — VFD INFORMATION cont Fig. C — Standard Display Example APPENDIX C — VFD INFORMATION contTo set the clock, perform the following procedure APPENDIX C — VFD INFORMATION contAPPENDIX C — VFD INFORMATION cont the status LED on the control panelTable C — Fault Codes APPENDIX C - VFD INFORMATION contCheck the heat sink as follows when necessary Table D — Alarm CodesTable E — Maintenance Intervals 1.Remove power from driveFrame Sizes R5 and R6 Fig. D - Main Fan Replacement Frame Sizes R1-R4Fig. E — Main Fan Replacement APPENDIX C — VFD INFORMATION contA48-7716 Fig. F - Internal Enclosure Fan ReplacementAPPENDIX C — VFD INFORMATION cont Configuration→SP→SP.CF = 1,2 and the static APPENDIX D — MODE SELECTION PROCESSFig. B — UPC Open Controller Fig. A — Address Rotary SwitchesAPPENDIX E — UPC OPEN CONTROLLER Fig. C — DIP Switches Configuring the BAS Port for BACnet MSTable A — SW3 Protocol Switch Settings for MS/TP Fig. D — Network WiringAPPENDIX E — UPC OPEN CONTROLLER cont Fig. E — BT485 Terminator InstallationTable C — MS/TP Wiring Recommendations Fig. F — BACview6 Device Connection APPENDIX E — UPC OPEN CONTROLLER contAPPENDIX E — UPC OPEN CONTROLLER cont Configuring the UPC Open Controllers PropTable E — LED Status Indicators NETWORK POINTS LIST APPENDIX E — UPC OPEN CONTROLLER contNETWORK POINTS LIST cont APPENDIX E — UPC OPEN CONTROLLER contReturn Air Relative Humidity APPENDIX E — UPC OPEN CONTROLLER contNETWORK POINTS LIST cont BACNET APPENDIX E — UPC OPEN CONTROLLER contNETWORK POINTS LIST cont BACNET APPENDIX E — UPC OPEN CONTROLLER contNETWORK POINTS LIST cont NETWORK POINTS LIST cont Local Machine DisableAPPENDIX E — UPC OPEN CONTROLLER cont BACNET APPENDIX E — UPC OPEN CONTROLLER contNETWORK POINTS LIST cont Multi-stageconstant volume units with INDEXInternal wiring Multi-stageconstant volume unitsPrinted in U.S.A Copyright 2010 Carrier CorporationCatalog No. Form 48/50A-9TITEM CONTROLS SET POINT AND CONFIGURATION LOGDEFAULT EXPANSIONCL-2 CL-3 CL-4 ITEM DEFAULTCL-5 EXPANSIONTEMPERATURES UNIT START-UPCHECKLISTPRE-START-UP START-UP