Carrier 48/50AJ manuals
Household Appliance > Air Conditioner
When we buy new device such as Carrier 48/50AJ we often through away most of the documentation but the warranty.
Very often issues with Carrier 48/50AJ begin only after the warranty period ends and you may want to find how to repair it or just do some service work.
Even oftener it is hard to remember what does each function in Air Conditioner Carrier 48/50AJ is responsible for and what options to choose for expected result.
Fortunately you can find all manuals for Air Conditioner on our side using links below.
Carrier 48/50AJ Specifications
190 pages 8.21 Mb
Controls, Start-Up, Operation, Service and TroubleshootingCONTENTS 2 CONTENTS (cont)SAFETY CONSIDERATIONS 3 GENERALCon ventions Used in Thi s Manual BASIC CONTROL USAGE ComfortLink Controls The ComfortLink control 4 Scr olling Marquee Accessory Navigator Displa y Operation 5 System Pilot Interface CCN T ables and Display 7 START-UP Unit Preparation Unit Setup Internal Wiring Accessory Installation Crankcase Heaters Evaporator F an Contr ols Gas Heat 8 Table 3 Fan Performance 48AJ,AK020,025 and 48A2,A3020 UnitsTable 4 Fan Performance 48AJ,AK027,030 and 48A2,A3025-030 Units 9 Table 5 Fan Performance 48AJ,AK,A2,A3035 UnitsTable 6 Fan Performance 48AJ,AK036 Units 10 Table 7 Fan Performance 48AJ,AK,A2,A3040 UnitsTable 8 Fan Performance 48AJ,AK041 Units 11 Table 9 Fan Performance 48AJ,AK,A2,A3050 UnitsTable 10 Fan Performance 48AJ,AK051 UnitsBhp Brake Horsepower edb Entering Dry Bulb ewb Entering Wet Bulb 12 Table 11 Fan Performance 48AJ,AK,A2,A3060 UnitsTable 12 Fan Performance 50AJ,AK020,025 and 50A2,A3020 Units 13 Table 13 Fan Performance 50AJ,AK027,030 and 50A2,A3025-030 UnitsTable 14 Fan Performance 50AJ,AKA2,A3035 Units 14 Table 15 Fan Performance 50AJ,AK036 UnitsTable 16 Fan Performance 50AJ,AK,A2,A3040 Units 15 Table 17 Fan Performance 50AJ,AK041 UnitsTable 18 Fan Performance 50AJ,AK,A2,A3050 Units 16 Table 19 Fan Performance 50AJ,AK051 UnitsTable 20 Fan Performance 50AJ,AK,A2,A3060 Units 17 Table 21 Fan Performance 48AW,AY020,025 and 48A4,A5020 UnitsTable 22 Fan Performance 48AW,AY027,030 and 48A4,A5025-030 Units 18 Table 23 Fan Performance 48AW,AY,A4,A5035 UnitsTable 24 Fan Performance 48AW,AY036 Units 19 Table 25 Fan Performance 48AW,AY,A4,A5040 UnitsTable 26 Fan Performance 48AW,AY041 Units 20 Table 27 Fan Performance 48AW,AY,A4,A5050 UnitsTable 28 Fan Performance 48AW,AY051 Units 21 Table 29 Fan Performance 48AW,AY,A4,A5060 UnitsTable 30 Fan Performance 50AW,AY020,025 and 50A4,A5020 Units 22 Table 31 Fan Performance 50AW,AY027,030 and 50A4,A5025-030 UnitsTable 32 Fan Performance 50AW,AY,A4,A5035 Units 23 Table 33 Fan Performance 50AW,AY036 UnitsTable 34 Fan Performance 50AW,AY,A4,A5040 Units 24 Table 35 Fan Performance 50AW,AY041 UnitsTable 36 Fan Performance 50AW,AY,A4,A5050 UnitsBhp Brake Horsepower edb Entering Dry Bulb ewb Entering Wet Bulb 25 Table 37 Fan Performance 50AW,AY051 UnitsTable 38 Fan Performance 50AW,AY,A4,A5060 Units 26 Table 39 Motor LimitationsTable 40A Air Quantity Limits (48AJ,AK,AW,AY,A2,A3,A4,A5) 27 CONTROLS QUICK STARTTwo-Stage Constant Volume Units with Mechanical Thermostat Two-Stage Constant Volume Units with Space Sensor 28 Variable Air Volume Units Using Return Air Sensor or Space T emperature Sensor Multi-Stage Constant Volume Units with Mechanical Thermostat Multi-Stage Constant Volume Units with Space Sensor Economizer Options 29 Indoor Air Quality (IAQ) OptionsExhaust Options Programming Operating Schedules SERVICE TEST General Service T est Mode Logic 30 Independent Outputs Fans in Service T est Mode Cooling in Service T est Mode Heating in Service T est Mode 31 THIRD PARTY CONTROL Thermostat Alarm Output Remote Switch VFD Contr ol Supply Air Rese t Demand Limit Contr ol Demand Controlled Ventilation Control 32 CONTROLS OPERATION Modes 34 System ModeFire- Smoke Control Exceptions Unit control free to choose HVAC Mode35 Unit Configu ration Subme nu 37 Cooling Control 50 Heating Control 55 Table 69B Staged Gas Heat 48A2,A3,A4,A5 UnitsTable 70 Staged Gas Heat Control Steps (Configuration HT.ST = 3) SG.CT SG.CF HT.ST = 1) Table 71 Staged Gas Heat Control Steps (Configuration HT.ST = 2) Table 72 Staged Gas Heat Control Steps (Configuration 57 Static Pressure Control 59 Fan Status Monitoring60 Dirty Filter Switch Economizer 63 Building Pressure Contr ol 66 Smoke Contr ol Modes 67 Indoor Air Quality Contr ol 69 Dehumidific ation and Re heat 71 T emperature Compe nsated Star t Carrier Comfort Network (CCN) System It 72 Alert Limit Configuration 73 Sensor T rim Configuration 74 Discrete Switch Logic Configuration Display Conf iguration Remote Contr ol Switch Input 75 Hot Gas Bypass Space T emperature Offset TIME CLOCK CONFIGURATION Hour and Minute (HH.MM) The hour and minute Month of Year (MNTH) This variable is the current Day of Month (DOM) This variable is the current Day of Week (DAY) This variable is the current day Year (YEAR) This variable is the current year (for ex- Local Time Schedule (SCH.L) This submenu is 76 Local Holiday Schedules (HOL.L) This submenuDaylight Savings Time (DAY.S) The daylight sav- 77 TROUBLESHOOTINGComplete Unit Stoppage Single Cir cuit Stoppage Service Analysis Restart Procedure Thermistor T r oubleshooting 78 T ransducer T r oubleshooting 79 Table 94 Cooling Service Analysis (cont)80 Table 95 Gas Heating Service AnalysisTable 96 Electric Heat Service Analysis 82 Table 97 5K Thermistor Temperature vs. Resistance (SCT Sensors) (English)83 Table 98 5K Thermistor Temperature vs. Resistance (SCT Sensors) (SI)84 Table 99 10K Thermistor vs. Resistance (T55, T56, OAT, RAT, EDT, LAT Sensors) (English)85 Table 100 10K Thermistor vs. Resistance (T55, T56, OAT, RAT, EDT, LAT Sensors) (SI)87 Table 103 Suction Pressure Transducer (PSIG) vs. Voltage (SP-A, SP-B, 48/50A2,A3,A4,A5 Units Only)90 For cing Inputs and Outputs Run Status Menu 93 Alarms and Aler ts 101 MAJOR SYSTEM COMPONENTS General Factory-Installed Components 117 LEGEND AND NOTES FOR FIG. 15-25 121 CEPL130351-01TEST 2 CEBD430351 TEST 1 Fig. 29 Controls Expansion Board (CEM) 123 +124 Accessory Control Compon ents 128 SERVICE Service Access Cleaning 130 LubricationEvaporator Fan Performance Adjustment (Fig. 40) Evaporator F an Coupling Assembly 131 Evaporator Fan Service and ReplacementBelt T ension Adjustment Evaporator-Fan Motor Replacement 132 Condenser-Fan AdjustmentFour -Inch Filter Replacement P o wer F ailure Refrigeran t Charge Thermostatic Expansion V alve (TXV) Gas Valve Adjustment20 Ton MCHX CIRCUIT A Charging Chart 133 Fig. 44 Charging Chart 48/50A2,A3,A4,A5020 with R-410A Refrigeranta48-8401Outdoor Air Temperature (deg F)Saturated Discharge Temperature (deg F) Saturated Discharge Temperature (deg F)20 Ton MCHX CIRCUIT B Charging Chart Outdoor Air Temperature (deg F) 134 Fig. 45 Charging Chart 48/50A2,A3,A4,A5025 and 027 with R-410A Refrigeranta48-840225 and 27 Ton MCHX CIRCUIT A Charging ChartSaturated Condensing Temperature (deg F)Saturated Condensing Temperature (deg F) Outdoor Air Temperature (deg F) 25 and 27 Ton MCHX CIRCUIT B Charging ChartOutdoor Air Temperature (deg F) 30 Ton MCHX CIRCUIT A Charging Chart 135 Fig. 46 Charging Chart 48/50A2,A3,A4,A5030 with R-410A RefrigerantOutdoor Air Temperature (deg F)Saturated Condensing Temperature (deg F) 30 Ton MCHX CIRCUIT B Charging ChartOutdoor Air Temperature (deg F) 35 Ton MCHX CIRCUIT A Charging Chart 136 Fig. 47 Charging Chart 48/50A2,A3,A4,A5035 with R-410A RefrigerantOutdoor Air Temperature (deg F)Saturated Condensing Temperature (deg F) 35 Ton MCHX CIRCUIT B Charging ChartOutdoor Air Temperature (deg F) 40 Ton MCHX Charging ChartOutdoor Air Temperature (deg F)Saturated Condensing Temperature (deg F) Saturated Condensing Temperature (deg F) 50 Ton MCHX Charging ChartOutdoor Air Temperature (deg F) 137 Fig. 48 Charging Chart 48/50A2,A3,A4,A5040 with R-410A RefrigerantFig. 49 Charging Chart 48/50A2,A3,A4,A5050 with R-410A Refrigerant60 Ton MCHX CIRCUIT A Charging Chart 138 Fig. 50 Charging Chart 48/50A2,A3,A4,A5060 with R-410A RefrigerantOutdoor Air Temperature (deg F)Saturated Condensing Temperature (deg F) 60 Ton MCHX CIRCUIT B Charging ChartOutdoor Air Temperature (deg F) 139 Main Burners Filter D rier Replacement P arts 148 APPENDIX B CCN TABLES161 APPENDIX C VFD INFORMATION162 VFD Operation 163 VFD Modes 165 Thir d P arty Controls VFD Diagnostics VFD Maintenance 170 APPENDIX D MODE SELECTION PROCESS171 APPENDIX E UPC OPEN CONTROLLERT o Address the UPC Open Contr oller 172 Configuring the BAS Port for BACnet MS/ TP Wiring the UPC Open Controller to the MS/TP Network 173 MS/TP Wiring Recommendations 174 Local access to the UPC Open 175 Configuring the UPC Open Controller's Prop- erties T r oubleshooting 176 NETWORK POINTS LIST183 INDEX185 CONTROLS SET POINT AND CONFIGURATION LOG190 UNIT START-UP CHECKLISTPRE-START-UP: START-UP:
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