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Carrier 48/50AJ Ton MCHX CIRCUIT A Charging Chart, Ton MCHX CIRCUIT B Charging Chart

Models: 48/50AJ

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30 Ton MCHX CIRCUIT A Charging Chart

30 Ton MCHX CIRCUIT A Charging Chart

					All Compressors on a Circuit Must be Operating
						All Outdoor Fans Must be Operating
	150
	145													S S T= 5 5 F
F)	140													S S T= 4 5 F
	140													S S T= 3 5 F
														S S T= 3 5 F
(deg	135
(deg	130
ture	130
ture	125			Reduce Charge if Above Curve
a	120
Temper	120
	115
	110
ing	110
ing	105
s									Add Charge if Below Curve
Conden	100								Add Charge if Below Curve
	100
	95
	90
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)

30 Ton MCHX CIRCUIT B Charging Chart

					All Compressors on a Circuit Must be Operating
						All Outdoor Fans Must be Operating
	150													S S T= 5 5 F
	145													S S T= 5 5 F
	145													S S T= 4 5 F
F)	140													S S T= 3 5 F
	140

(deg	135
(deg	130
re	130
re	125
tu	125			Reduce Charge if Above Curve
tu				Reduce Charge if Above Curve
Tempera	120
	115
	110
ing	110
ing	105
s									Add Charge if Below Curve
Conden									Add Charge if Below Curve
	100
	95
	90
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)

LEGEND

MCHX— Microchannel Heat Exchanger

SST — Saturated Suction Temperature

Fig. 46 — Charging Chart — 48/50A2,A3,A4,A5030 with R-410A Refrigerant

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Image 135

Carrier 48/50AJ specifications Ton MCHX CIRCUIT A Charging Chart, Ton MCHX CIRCUIT B Charging Chart

Contents

CONTENTS Two-StageConstant Volume Units withMulti-StageConstant Volume Units with APPENDIX D - MODE SELECTION CONTENTS contSAFETY CONSIDERATIONS APPENDIX A — LOCAL DISPLAY TABLES . . . .GENERAL BASIC CONTROL USAGETable 1 — A Series Product Line Fig. 1 — Scrolling Marquee Fig. 2 — Accessory Navigator DisplayFig. 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 Indoor Air Quality IAQ Options SERVICE TESTFans in Service Test Mode — Upon entering the Demand Controlled Ventilation Control — THIRD PARTY CONTROLCONTROLS OPERATION SYSTEM MODES Operating Modes→SYS.M Table 42 — Operating Modes Display TableSmoke Fig. 4 — Mode SelectionFire SystemC.TYP = 1 VAV-RATand C.TYP = 2 VAV-SPT MAT.S = Table 43 — Unit Configuration•MAT.S = •MAT.S =under Configuration→UNIT Table 45 — Setpoints Table 44 - Machine Dependent ConfigurationsTable 46 — Supply Air Reset Configuration →SA.S.RTable 47 — Cooling Configuration Time After Compressor is Stopped Fig. 5 — Advanced Scroll TemperatureProtection Label Fig. 6 — Recommended Minimum Cool-DownFig. 8 — Cool Mode Evaluation •Lo Cool Mode mechanical stages = Table 50 — 2-StageSequence — 48/50AJ,AW030-060 Table 49 — 2-StageSequence — 48/50AJ,AW020-027Table 56 — 2-StageSequence — 48/50A2,A4030-060 Table 55 — 2-StageSequence — 48/50A2,A4020-027STAGE R.PCT = MAT – EDT/ C.CAP Z.MIN = Configuration→COOL→Z.GN * –10+Z.PLU = Configuration→COOL→Z.GN * 10 + Table 61 - Run Status Mode Trip HelperTable 62 — Run Status Cool Display •MAT.S = Inputs→GEN.I→DL.S1 Inputs→GEN.I→DL.S2•MAT.S = •MAT.S =•Configuration→COOL→M.M. – Motor Master Control? Table 63 - Demand Limit ConfigurationEC.C.P = Setpoints→SA.LO + Inputs→RSET→SA.S.R Table 64 — Condenser Fan StagingTable 65 — Heating Configuration Table 66 — Heat/Cool Set Point Offsets Fig. 9 — Heating OffsetsTable 67 — Mode Trip Helper Table Error = HT.C.P – LATTable 69A — Staged Gas Heat — 48AJ,AK,AW,AY Units Table 68 — Staged Gas ConfigurationTable 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 76 — Static Pressure Reset Related Points Table 77 - Fan Status Monitoring ConfigurationTable 78 - Dirty Filter Switch Points Enthalpy Control Fig. 10 — Psychrometric Chart forInputs→GEN.I→E.SW E.SEL =Fig. 11 — Custom Changeover Curve Example Table 79 — Economizer Configuration TableC.TYP = C.TYP =C.TYP = C.TYP =Table 80 — Economizer Run Status Table Table 82 — Power Exhaust Staging BP.CF = Table 81 — Building Pressure ConfigurationTable 83 — Power Exhaust Staging BP.CF = RELEVANT ITEMS Fig. 13 — IAQ Response Curve Point Configuration→IAQ→AQ.SP→D.F.ON. The fanPoint Configuration→IAQ→AQ.SP→D.F.OF. The con Fig. 12 — IAQ ControlIAQ Purge Configuration → IAQ → IAQ.P → IQ.PG— Table 85 — Dehumidification Configuration Table 84 - Indoor Air Quality ConfigurationCarrier Comfort Network CCN System - It Temperature Compensated Start — This logic isTable 86 — CCN Configuration Table 88 - Sensor Trim Configuration Table 87 — Alert Limit 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 96 — Electric Heat Service Analysis Table 95 — Gas Heating Service AnalysisA48-5656 Fig. 14 — IGC Service Analysis LogicTEMP 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 R.PCT = MAT - EDT/C.CAP Y.MIN = -SUB.R*0.4375Y.PLU = –ADD.R*0.4375 Z.PLU = Configuration→COOL→Z.GN * 10 + Table 105 — Auto View of Run Status Display TableTable 106 - Economizer Run Status Display Table Z.MIN = Configuration→COOL→Z.GN * –10+Table 110 — Compressor Run Hours Display Table Table 107 — Cooling Information Display TableTable 108 — Mode Trip Helper Display Table Table 109 — CCN/Linkage 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 MAJOR SYSTEM COMPONENTS Factory-InstalledComponentsa48-8355 RED JUMPER WIRE MUST BE ADDED~ ~ ~ ~ ~ ~~ TO NEXT PAGEa48-8355 a48-8355 ~ TO NEXT ~PAGE ~ ~ ~ ~ ~ ~ ~~ ~~ ~~ A48-7294a48-8356 ~~~~a48--8357 A48-7296 TO NEXT PAGEA48-8358 a50-8228 TO NEXT PAGE A48-7298a48-8360 FROM PREVIOUS PAGEPage a48-8361 SW1 SW2 OR DEHUMIDIFY SWITCHa48-8362 A48-7302 LEGEND LEGEND AND NOTES FOR FIG.A48-7811 Fig. 26 — Main Base Board MBBPOINT A48-7707 Fig. 28 — Staged Gas Heat Control Board SCBTEST Fig. 29 — Controls Expansion Board CEMCEPL130351 CEBD430351Table 119 — Controls Expansion Board CEM Inputs Table 120 — IGC Board Inputs and OutputsFig. 30 — Scrolling Marquee Table 121 — VFD Terminal Designations Fig. 31 — VFD WiringTB5 TB6 W2 GTable 122 — Field Connection Terminal Strips Fig. 34 — Accessory Navigator Display Fig. 35 — CCN System Architecture Fig. 38 — Typical Gas Heating Section SERVICEFig. 37 - Spark Gap Adjustment Fig. 36 — Door LatchFig. 39 — Gas Heat Section Details Lubrication Fig. 40 — Evaporator-FanAlignment and AdjustmentFig. 42 — Belt Tension Adjustment Evaporator Fan Service and ReplacementBelt Tension Adjustment — To adjust belt tension Evaporator-FanMotor ReplacementTable 123 - Round Tube, Plate Fin Unit Charge Condenser-FanAdjustmentGas Valve Adjustment Fig. 43 — Condenser-FanAdjustmenta48-8401 a48-8402 25 and 27 Ton MCHX CIRCUIT A Charging Chart25 and 27 Ton MCHX CIRCUIT B Charging Chart 30 Ton MCHX CIRCUIT B Charging Chart 30 Ton MCHX CIRCUIT A Charging Chart35 Ton MCHX CIRCUIT B Charging Chart 35 Ton MCHX CIRCUIT A Charging Chart50 Ton MCHX Charging Chart 40 Ton MCHX Charging Chart60 Ton MCHX CIRCUIT B Charging Chart 60 Ton MCHX CIRCUIT A Charging ChartFig. 52 — Main Burner Removal Fig. 51 — Gas Valve Part Number EF33CW271MODE — RUN STATUS APPENDIX A — LOCAL DISPLAY TABLESMODE — RUN STATUS cont APPENDIX A - LOCAL DISPLAY TABLES contMODE — SERVICE TEST MODE — TEMPERATURESMODE — INPUTS APPENDIX A — LOCAL DISPLAY TABLES contMODE — PRESSURES MODE — SET POINTSMODE — OUTPUTS MODE — CONFIGURATIONAPPENDIX A — LOCAL DISPLAY TABLES cont MODE — INPUTS contITEM MODE - CONFIGURATION contDEFAULT APPENDIX A — LOCAL DISPLAY TABLES cont→BP.CF APPENDIX A — LOCAL DISPLAY TABLES cont→CCNA APPENDIX A — LOCAL DISPLAY TABLES contMODE - OPERATING MODES MODE — ALARMSAPPENDIX A — LOCAL DISPLAY TABLES cont MODE — TIME CLOCKSTATUS DISPLAY TABLES APPENDIX B — CCN TABLESSTATUS DISPLAY TABLES cont APPENDIX B - CCN TABLES contAPPENDIX B — CCN TABLES cont STATUS DISPLAY TABLES contTABLE CONFIG TABLES SET POINT TABLEAPPENDIX B — CCN TABLES cont CONFIG TABLES cont SERVICE-CONFIGTABLESAPPENDIX B — CCN TABLES cont APPENDIX B — CCN TABLES cont SERVICE-CONFIGTABLES contSERVICE-CONFIGTABLES cont APPENDIX B — CCN TABLES contTABLE TABLE SERVICE-CONFIGTABLES contDEFAULT APPENDIX B — CCN TABLES contAPPENDIX B — CCN TABLES cont MAINTENANCE DISPLAY TABLESRANGE MAINTENANCE DISPLAY TABLES contAPPENDIX B — CCN TABLES cont DISPLAY NAMEMAINTENANCE DISPLAY TABLES cont APPENDIX B — CCN TABLES contTABLE MAINTENANCE DISPLAY TABLES cont APPENDIX B — CCN TABLES contTABLE TIME SCHEDULE CONFIG TABLE MAINTENANCE DISPLAY TABLES contAPPENDIX B - CCN TABLES cont Fig. A — VFD Wiring APPENDIX C - VFD INFORMATIONTable A — VFD Terminal Designations Table B — VFD Configurations APPENDIX C — VFD INFORMATION contFig. B — VFD Keypad APPENDIX C — VFD INFORMATION cont Fig. C — Standard Display ExampleAPPENDIX C — VFD INFORMATION cont To set the clock, perform the following procedurethe status LED on the control panel APPENDIX C — VFD INFORMATION contAPPENDIX C - VFD INFORMATION cont Table C — Fault Codes1.Remove power from drive Table D — Alarm CodesTable E — Maintenance Intervals Check the heat sink as follows when necessaryAPPENDIX C — VFD INFORMATION cont Fig. D - Main Fan Replacement Frame Sizes R1-R4Fig. E — Main Fan Replacement Frame Sizes R5 and R6Fig. F - Internal Enclosure Fan Replacement APPENDIX C — VFD INFORMATION contA48-7716 APPENDIX D — MODE SELECTION PROCESS Configuration→SP→SP.CF = 1,2 and the staticFig. A — Address Rotary Switches APPENDIX E — UPC OPEN CONTROLLERFig. B — UPC Open Controller Fig. D — Network Wiring Configuring the BAS Port for BACnet MSTable A — SW3 Protocol Switch Settings for MS/TP Fig. C — DIP SwitchesFig. E — BT485 Terminator Installation Table C — MS/TP Wiring RecommendationsAPPENDIX E — UPC OPEN CONTROLLER cont APPENDIX E — UPC OPEN CONTROLLER cont Fig. F — BACview6 Device ConnectionConfiguring the UPC Open Controllers Prop Table E — LED Status IndicatorsAPPENDIX E — UPC OPEN CONTROLLER cont APPENDIX E — UPC OPEN CONTROLLER cont NETWORK POINTS LISTAPPENDIX E — UPC OPEN CONTROLLER cont NETWORK POINTS LIST contAPPENDIX E — UPC OPEN CONTROLLER cont NETWORK POINTS LIST contReturn Air Relative Humidity APPENDIX E — UPC OPEN CONTROLLER cont NETWORK POINTS LIST contBACNET APPENDIX E — UPC OPEN CONTROLLER cont NETWORK POINTS LIST contBACNET Local Machine Disable APPENDIX E — UPC OPEN CONTROLLER contNETWORK POINTS LIST cont APPENDIX E — UPC OPEN CONTROLLER cont NETWORK POINTS LIST contBACNET Multi-stageconstant volume units INDEXInternal wiring Multi-stageconstant volume units withForm 48/50A-9T Copyright 2010 Carrier CorporationCatalog No. Printed in U.S.AEXPANSION CONTROLS SET POINT AND CONFIGURATION LOGDEFAULT ITEMCL-2 CL-3 CL-4 EXPANSION DEFAULTCL-5 ITEMSTART-UP UNIT START-UPCHECKLISTPRE-START-UP TEMPERATURES