Carrier WEATHERMAKER 48J Started Manual

Also see for 48AJ: Installation, Start-Up and Service Instructions Installation instructions Operation and service guide Operating and service guide

WEATHERMAKER ®48/50AJ,AK,AW, AY,A2,A3,A4,A5020-060Single Package Large Rooftop Unitswith COMFORTLINK Ti Version 5.x ControlsControls, Start-Up, Operation,Service and TroubleshootingCONTENTSPageSAFETY CONSiDERATiONS ......................... 2GENERAL ......................................... 2,3Conventions Used in this Manual .................... 3BASIC CONTROL USAGE .......................... 3-6ComfortLink Controls ............................... 3Scrolling Marquee ................................... 4Accessory Navigator TM Display ...................... 4Operation ............................................ 4System PilotTM Interface ............................. 5CON Tables and Display ............................. 5• GENERICS STATUS DISPLAY TABLESTART-UP ........................................ 7-27Unit 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 .................... 28Multi-Stage Constant Volume Units withMechanical Thermostat .......................... 28Multi-Stage Constant Volume Units withSpace Sensor .................................... 28Economizer Options ................................ 28Indoor Air Quality Options .......................... 29Exhaust Options .................................... 29Programming Operating Schedules ................ 29SERVICE TEST .................................. 29,30General ............................................. 29Service Test Mode Logic ........................... 29Independent Outputs ............................... 30Fans in Service Test Mode ......................... 30Cooling in Service Test Mode ....................... 30Heating in Service Test Mode ....................... 30THIRD PARTY CONTROL ........................ 3L32Thermostat ......................................... 3]Alarm Output ....................................... 3]Remote Switch ..................................... 3!VFD Control ........................................ 3]Supply Air Reset ................................... 3]Demand Limit Control .............................. 3]Demand Controlled Ventilation Control ............. 3!CONTROLS OPERATION ........................ 32-75Modes .............................................. 32• SYSTEM MODES• HVAC MODESPageUnit Configuration Submenu ....................... 35Cooling Control .................................... 37• 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 .................................... 5O• 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 INLINKAGE SYSTEMS• MORNING WARM UP• TEMPERING MODEStatic Pressure Control ............................ 57• OPERATION• SETTING UP THE SYSTEM• STATIC PRESSURE RESET OPERATION• RELATED POINTSFan Status Monitoring .............................. 59• GENERAL• SETTING UP THE SYSTEM• SUPPLY FAN STATUS MONITORING LOGICDirty Filter Switch .................................. 60Economizer ........................................ 60• SETTING UP THE SYSTEM• ECONOMIZER OPERATION• UNOCCUPIED ECONOMIZER FREE COOLING• ECONOMIZER OPERATION CONFIGURATION• ECONOMIZER DIAGNOSTIC HELPBuilding Pressure Control .......................... 63• BUILDING PRESSURE CONFIGURATION• CONSTANT VOLUME 2-STAGE CONTROLOPERATION• MULTIPLE POWER EXHAUST STAGE BUILDINGPRESSURE CONTROL OPERATION• VFD POWER EXHAUST BUILDING PRESSURECONTROLSmoke Control Modes .............................. 66• FIRE-SMOKE INPUTS• AIRFLOW CONTROL DURING THEFIRE-SMOKE MODES• RELEVANT ITEMSManufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.Catalog No. 04-53480050-01 Printed in U.S.A. Form 48/5OA-7T Pg 1 5-08 Replaces: 48/50A-6T