Carrier 48AJ Operating And Service Manual
Also see for 48AJ: Installation, Start-Up and Service InstructionsInstallation instructionsOperation and service guideStarted guide
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Contents
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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Catalog No. 04-53480037-01 Printed in U.S.A. Form 48/50A-4T Pg 1 8-06 Replaces: 48/50A-3TBook 1 1Tab 1a 1bControls, Start-Up, Operation,Service and TroubleshootingCONTENTSPageSAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . .2GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2,3BASIC CONTROL USAGE. . . . . . . . . . . . . . . . . . . . . . . . . . 3-6ComfortLink Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Scrolling Marquee . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3Accessory Navigator™ Display. . . . . . . . . . . . . . . . . . . . . .4Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4System Pilot™ Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4CCN Tables and Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5• GENERICS STATUS DISPLAY TABLEConventions Used in this Manual. . . . . . . . . . . . . . . . . . . .5START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-26Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Unit Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Internal Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Accessory Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Crankcase Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Evaporator Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7Gas Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7CONTROLS QUICK START . . . . . . . . . . . . . . . . . . . . . . 27-29Two-Stage Constant Volume Units withMechanical Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . .27Two-Stage Constant Volume Units withSpace Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27Variable Air Volume Units Using Return Air Sensoror Space Temperature Sensor . . . . . . . . . . . . . . . . . . . .27Multi-Stage Constant Volume Units withMechanical Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . .28Multi-Stage Constant Volume Units withSpace Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28Economizer Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28Indoor Air Quality Options. . . . . . . . . . . . . . . . . . . . . . . . . .28Exhaust Options. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28Set Clock on VFD (If Installed) . . . . . . . . . . . . . . . . . . . . . .28Programming Operating Schedules . . . . . . . . . . . . . . . .29SERVICE TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29,30General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29Service Test Mode Logic . . . . . . . . . . . . . . . . . . . . . . . . . . .29Independent Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30Cooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30THIRD PARTY CONTROL . . . . . . . . . . . . . . . . . . . . . . . . 30-32Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30Alarm Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30Remote Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30VFD Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31Supply Air Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31Demand Limit Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31Demand Controlled Ventilation Control . . . . . . . . . . . . .31CONTROLS OPERATION . . . . . . . . . . . . . . . . . . . . . . . . 32-72Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32• SYSTEM MODES• HVAC MODESPageUnit Configuration Submenu . . . . . . . . . . . . . . . . . . . . . . . 35Cooling Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36• SETTING UP THE SYSTEM• MACHINE DEPENDENT CONFIGURATIONS• SET POINTS• SUPPLY AIR RESET CONFIGURATION• COOLING CONFIGURATION• COMPRESSOR SAFETIES• COMPRESSOR TIME GUARDS• COOL MODE SELECTION PROCESS• COOLING MODE DIAGNOSTIC HELP• SUMZ COOLING ALGORITHM• DEMAND LIMIT CONTROL• HEAD PRESSURE CONTROL• ECONOMIZER INTEGRATION WITHMECHANICAL COOLINGHeating Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47• SETTING UP THE SYSTEM• HEAT MODE SELECTION PROCESS• TEMPERATURE DRIVEN HEAT MODEEVALUATION• HEAT MODE DIAGNOSTIC HELP• INTEGRATED GAS CONTROL BOARD LOGIC• RELOCATE SAT SENSOR FOR HEATING —LINKAGE SYSTEMS• MORNING WARM UP• TEMPERING MODEStatic Pressure Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54• OPERATION• SETTING UP THE SYSTEM• STATIC PRESSURE RESET• RELATED POINTSFan Status Monitoring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57• GENERAL• SETTING UP THE SYSTEM• SUPPLY FAN STATUS MONITORING LOGICDirty Filter Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57• SETTING UP THE SYSTEM• ECONOMIZER OPERATION• UNOCCUPIED ECONOMIZER FREE COOLING• ECONOMIZER OPERATION CONFIGURATION• ECONOMIZER DIAGNOSTIC HELPBuilding Pressure Control. . . . . . . . . . . . . . . . . . . . . . . . . . 61• BUILDING PRESSURE CONFIGURATION• CONSTANT VOLUME 2-STAGE CONTROLOPERATION• MULTIPLE POWER EXHAUST STAGE BUILDINGPRESSURE CONTROL OPERATIONSmoke Control Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63• FIRE-SMOKE INPUTS• AIRFLOW CONTROL DURINGFIRE-SMOKE MODES48/50AJ,AK,AW,AY020-060Single Package Large Rooftop Unitswith Scroll Compressorsand COMFORTLINK™ Version 4.X Controls |
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This manual is suitable for:
48AJ50AW02050AW02550AW02750AW03050AW03550AW03650AW04050AW04150AW05050AW06050AY02050AY02550AY02750AY03050AY03550AY03650AY04050AY04150AY05050AY060AKAWAY020AY060WEATHERMAKER 48AJ020WEATHERMAKER 48AJ025WEATHERMAKER 48AJ027WEATHERMAKER 48AJ030WEATHERMAKER 48AJ035WEATHERMAKER 48AJ036WEATHERMAKER 48AJ040WEATHERMAKER 48AJ041WEATHERMAKER 48AJ050WEATHERMAKER 48AJ060WEATHERMAKER 48AK020WEATHERMAKER 48AK025WEATHERMAKER 48AK027WEATHERMAKER 48AK030WEATHERMAKER 48AK035WEATHERMAKER 48AK036WEATHERMAKER 48AK040WEATHERMAKER 48AK041WEATHERMAKER 48AK050WEATHERMAKER 48AK060WEATHERMAKER 48AW020WEATHERMAKER 48AW025WEATHERMAKER 48AW027WEATHERMAKER 48AW030WEATHERMAKER 48AW035WEATHERMAKER 48AW036WEATHERMAKER 48AW040WEATHERMAKER 48AW041WEATHERMAKER 48AW050WEATHERMAKER 48AW060WEATHERMAKER 48AY020WEATHERMAKER 48AY025WEATHERMAKER 48AY027WEATHERMAKER 48AY030WEATHERMAKER 48AY035WEATHERMAKER 48AY036WEATHERMAKER 48AY040WEATHERMAKER 48AY041WEATHERMAKER 48AY050WEATHERMAKER 48AY060WEATHERMAKER 50AJWEATHERMAKER 50AJ020WEATHERMAKER 50AJ025WEATHERMAKER 50AJ027WEATHERMAKER 50AJ030WEATHERMAKER 50AJ035WEATHERMAKER 50AJ036WEATHERMAKER 50AJ040WEATHERMAKER 50AJ041WEATHERMAKER 50AJ050WEATHERMAKER 50AJ060WEATHERMAKER 50AK020WEATHERMAKER 50AK025WEATHERMAKER 50AK027WEATHERMAKER 50AK030WEATHERMAKER 50AK035WEATHERMAKER 50AK036WEATHERMAKER 50AK040WEATHERMAKER 50AK041WEATHERMAKER 50AK050WEATHERMAKER 50AK060
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