Carrier WeatherMaker 48A2020 Controls, Start-up, Operation, Service And Troubleshooting Instructions
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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. 04-53480239-01 Printed in U.S.A. Form 48/50A-14T Pg 1 5-19 Replaces: 48/50A-13TControls, Start-Up, Operation,Service and TroubleshootingSAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 2GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3Conventions Used in This Manual . . . . . . . . . . . . . . . 3BASIC CONTROL USAGE . . . . . . . . . . . . . . . . . . . . . 4ComfortLink Controls . . . . . . . . . . . . . . . . . . . . . . . . . 4Scrolling Marquee . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4Accessory Navigator™ Display . . . . . . . . . . . . . . . . . 4Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5CCN Tables and Display . . . . . . . . . . . . . . . . . . . . . . . 5START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Unit Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Unit Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Internal Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Accessory Installation . . . . . . . . . . . . . . . . . . . . . . . . 7Crankcase Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Evaporator Fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7Gas Heat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7CONTROLS QUICK START . . . . . . . . . . . . . . . . . . . 21VAV Units Using Return Air Sensor or SpaceTemperature Sensor . . . . . . . . . . . . . . . . . . . . . . . 21Multi-Stage Constant Volume (CV) Units withMechanical Thermostat . . . . . . . . . . . . . . . . . . . . 21Multi-Stage Constant Volume Units with SpaceSensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Economizer Options . . . . . . . . . . . . . . . . . . . . . . . . . 22Indoor Air Quality (IAQ) Options . . . . . . . . . . . . . . . 22Exhaust Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22Programming Operating Schedules . . . . . . . . . . . . 22SERVICE TEST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23Service Test Mode Logic . . . . . . . . . . . . . . . . . . . . . 24Independent Outputs . . . . . . . . . . . . . . . . . . . . . . . . 24Fans in Service Test Mode . . . . . . . . . . . . . . . . . . . . 24Cooling in Service Test Mode . . . . . . . . . . . . . . . . . 24Heating in Service Test Mode . . . . . . . . . . . . . . . . . 24Humidi-MiZer® System . . . . . . . . . . . . . . . . . . . . . . . 24THIRD PARTY CONTROL . . . . . . . . . . . . . . . . . . . . . 25Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Alarm Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Remote Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25VFD Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Supply Air Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26Demand Limit Control . . . . . . . . . . . . . . . . . . . . . . . . 26Demand Controlled Ventilation Control . . . . . . . . . 26CONTROLS OPERATION . . . . . . . . . . . . . . . . . . . . . 27Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27Unit Configuration Submenu . . . . . . . . . . . . . . . . . . 31Cooling Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33Heating Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50Static Pressure Control . . . . . . . . . . . . . . . . . . . . . . .56Fan Status Monitoring . . . . . . . . . . . . . . . . . . . . . . . .60Dirty Filter Switch . . . . . . . . . . . . . . . . . . . . . . . . . . .60Economizer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .60Building Pressure Control . . . . . . . . . . . . . . . . . . . .66Smoke Control Modes . . . . . . . . . . . . . . . . . . . . . . . .68Indoor Air Quality Control . . . . . . . . . . . . . . . . . . . . .69Dehumidification and Reheat . . . . . . . . . . . . . . . . . .73Humidi-MiZer Adaptive Dehumidification System . . .75Temperature Compensated Start . . . . . . . . . . . . . . .76Carrier Comfort Network (CCN) System . . . . . . . . .77Alert Limit Configuration . . . . . . . . . . . . . . . . . . . . . .78Sensor Trim Configuration . . . . . . . . . . . . . . . . . . . .79Discrete Switch Logic Configuration . . . . . . . . . . . .79Display Configuration . . . . . . . . . . . . . . . . . . . . . . . .80Remote Control Switch Input . . . . . . . . . . . . . . . . . .80Hot Gas Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . .81Space Temperature Offset . . . . . . . . . . . . . . . . . . . .81TIME CLOCK CONFIGURATION . . . . . . . . . . . . . . . .82Hour and Minute (HH.MM) . . . . . . . . . . . . . . . . . . . . .82Month of Year (MNTH) . . . . . . . . . . . . . . . . . . . . . . . .82Day of Month (DOM) . . . . . . . . . . . . . . . . . . . . . . . . .82Day of Week (DAY) . . . . . . . . . . . . . . . . . . . . . . . . . . .82Year (YEAR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82Local Time Schedule (SCH.L) . . . . . . . . . . . . . . . . . .82Local Holiday Schedules (HOL.L) . . . . . . . . . . . . . .83Daylight Savings Time (DAY.S) . . . . . . . . . . . . . . . .83TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . .83Complete Unit Stoppage . . . . . . . . . . . . . . . . . . . . . .83Single Circuit Stoppage . . . . . . . . . . . . . . . . . . . . . .83Service Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . .83Restart Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . .83Humidi-MiZer Troubleshooting . . . . . . . . . . . . . . . . .84Thermistor Troubleshooting . . . . . . . . . . . . . . . . . . .84Transducer Troubleshooting . . . . . . . . . . . . . . . . . .84Forcing Inputs and Outputs . . . . . . . . . . . . . . . . . . .98Run Status Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . .98Alarms and Alerts . . . . . . . . . . . . . . . . . . . . . . . . . .101MAJOR SYSTEM COMPONENTS . . . . . . . . . . . . . .110General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110Factory-Installed Components . . . . . . . . . . . . . . . .111Accessory Control Components . . . . . . . . . . . . . .134SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137Service Access . . . . . . . . . . . . . . . . . . . . . . . . . . . .137Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .137WeatherMaker ®48/50A020-060Single Package Large Rooftop Unitswith ComfortLink Version 10.x Controls |
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This manual is suitable for:
303050259040WEATHERMAKER 48A2020WEATHERMAKER 48A2025WEATHERMAKER 48A2030WEATHERMAKER 48A2035WEATHERMAKER 48A2040WEATHERMAKER 48A2050WEATHERMAKER 48A2060WEATHERMAKER 48A3020WEATHERMAKER 48A3025WEATHERMAKER 48A3035WEATHERMAKER 48A3040WEATHERMAKER 48A3050WEATHERMAKER 48A3060WeatherMaker 48A4020WeatherMaker 48A4025WeatherMaker 48A4030WeatherMaker 48A4035WeatherMaker 48A4040WeatherMaker 48A4050WeatherMaker 48A4060WeatherMaker 48A5020WeatherMaker 48A5025WeatherMaker 48A5030WeatherMaker 48A5035WeatherMaker 48A5040WeatherMaker 48A5050WeatherMaker 48A5060WeatherMaker 48A6020WeatherMaker 48A6025WeatherMaker 48A6030WeatherMaker 48A6035WeatherMaker 48A6040WeatherMaker 48A6050WeatherMaker 48A6060WeatherMaker 48A7020WeatherMaker 48A7025WeatherMaker 48A7030WeatherMaker 48A7035WeatherMaker 48A7040WeatherMaker 48A7050WeatherMaker 48A7060WeatherMaker 48A8020WeatherMaker 48A8025WeatherMaker 48A8030WeatherMaker 48A8035WeatherMaker 48A8040WeatherMaker 48A8050WeatherMaker 48A8060WeatherMaker 48A9020WeatherMaker 48A9025WeatherMaker 48A9030WeatherMaker 48A9035WeatherMaker 48A9050WeatherMaker 48A9060WEATHERMAKER 50A2020WEATHERMAKER 50A2025WEATHERMAKER 50A2030WEATHERMAKER 50A2035WEATHERMAKER 50A2040WEATHERMAKER 50A2050WEATHERMAKER 50A2060WEATHERMAKER 50A3020WEATHERMAKER 50A3025WEATHERMAKER 50A3030WEATHERMAKER 50A3035WEATHERMAKER 50A3040WEATHERMAKER 50A3050WEATHERMAKER 50A3060WeatherMaker 50A4020WeatherMaker 50A4025WeatherMaker 50A4030WeatherMaker 50A4035WeatherMaker 50A4040WeatherMaker 50A4050WeatherMaker 50A4060WeatherMaker 50A5020WeatherMaker 50A5030WeatherMaker 50A5035WeatherMaker 50A5040WeatherMaker 50A5050WeatherMaker 50A5060WeatherMaker 50A6020WeatherMaker 50A6025WeatherMaker 50A6030WeatherMaker 50A6035WeatherMaker 50A6040WeatherMaker 50A6050WeatherMaker 50A6060WeatherMaker 50A7020WeatherMaker 50A7025WeatherMaker 50A7030WeatherMaker 50A7035WeatherMaker 50A7040WeatherMaker 50A7050WeatherMaker 50A7060WeatherMaker 50A8020WeatherMaker 50A8025WeatherMaker 50A8030WeatherMaker 50A8035WeatherMaker 50A8040WeatherMaker 50A8050WeatherMaker 50A8060WeatherMaker 50A9020WeatherMaker 50A9025WeatherMaker 50A9030WeatherMaker 50A9035WeatherMaker 50A9040WeatherMaker 50A9050WeatherMaker 50A9060
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