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Only trained, qualified personnel should work on the unit, and all applicable safety codes plus PPE such as safety glasses and gloves are required.","Answer",{"name":64,"@type":59,"acceptedAnswer":65},"How should power be handled during installation and service?",{"text":66,"@type":62},"Shut off all power to the equipment during installation and service, and note there may be more than one disconnect switch. Tag each disconnect location so others do not restore power until work is completed.",{"name":68,"@type":59,"acceptedAnswer":69},"What procedure does the manual emphasize for removing components that contain oil and refrigerant under pressure?",{"text":70,"@type":62},"Do not use a torch. 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Start-Up, Operation, Service, and Troubleshooting  \nCONTENTS  \nPage  \nSAFETY CONSIDERATIONS ................... 2  \nGENERAL ................................... 2  \nConventions Used in This Manual ............... 2  \nMAJOR SYSTEM COMPONENTS ................ 3  \nMain Base Board (MBB) ....................... 3  \nAuxiliary (AUX) Board ......................... 3  \nElectronic Expansion Valve (EXV) Board ......... 3  \nCompressor Protection Module (CPM) ........... 3  \nEnergy Management Module (EMM) ............. 3  \nEnable/Off/Remote Contact Switch .............. 3  \nEmergency On/Off Switch ..................... 3  \nBoard Addresses ............................ 3  \nControl Module Status LEDs ................... 3  \nCarrier Comfort Network (CCN) Interface ......... 3  \nCONTROLS OPERATION ...................... 4  \nElectronic Expansion Valve (EXV) .............. 4  \nOil Pumps .................................. 5  \nMotor Cooling ............................... 5  \nBack Pressure Valve (30HXA only) .............. 5  \nSensors .................................... 5  \nCompressor Protection Module (CPM) ........... 5  \nWye-Delta vs Across-the-Line (XL) Starting Option .. 9  \nCapacity Control ............................ 10  \nHead Pressure Control ....................... 13  \nControl Methods ............................ 16  \nCooling Set Point Select ..................... 17  \nIce Mode ................................... 17  \nCooler and Condenser (30HXC) Pump Control ... 17  \nNavigator™ Display Module Usage ............. 17  \nService Test ................................ 18  \nConfiguring and Operating Dual Chiller Control .. 37  \nAlarms/Alerts ............................... 37  \nRun Hours and Starts ........................ 37  \nTemperature Reset .......................... 37  \nDemand Limit .............................. 38  \nCooling Set Point (4 to 20 mA) ................. 39  \nTROUBLESHOOTING ........................ 40  \nChecking Display Codes ..................... 40  \nUnit Shutoff ................................ 40  \nComplete Unit Stoppage ..................... 40  \nSingle Circuit Stoppage ...................... 40  \nRestart Procedure ........................... 40  \nAlarms and Alerts ...........................40  \nCompressor Alarm/Alert Circuit ................40  \nEXV Troubleshooting Procedure ...............48  \nServicing Coolers and Condensers ...............50  \nInspecting/Cleaning Heat Exchangers ..........52  \nWater Treatment ............................52  \nRefrigerant Charging/Adding Charge ...........52  \nOil Charging/Low Oil Recharging ...............53  \nOil Filter Maintenance ........................54  \nCompressor Changeout Sequence .............54  \nMoisture-Liquid Indicator .....................56  \nFilter Drier .................................. 56  \nLiquid Line Service Valve .....................56  \nThermistors ................................56  \nPressure Transducers ........................63  \nChilled Water Flow Switch ....................64  \nFlow Sensor ................................65  \nSafety Devices ..............................66  \nRelief Devices ..............................66  \nControl Modules ............................66  \nCarrier Comfort Network (CCN) Interface ........68  \nReplacing Defective Modules ..................68  \nWinter Shutdown Preparation .................68  \nMaintenance ................................69  \nPRE-START-UP PROCEDURE .................69  \nSystem Check ..............................69  \nSTART-UP AND OPERATION ..................70  \nActual Start-Up .................................70  \nOperating Sequence ............................70  \nFIELD WIRING ..............................70  \nAPPENDIX A —CAPACITY LOADING SEQUENCE .............................. 73  \nAPPENDIX B —AVAILABLE ACCESSORIES..... 78  \nAPPENDIX C —COOLER AND CONDENSER PRESSURE DROP................","cbCaii9680ywAoYr","https://ap.wps.com/l/cbCaii9680ywAoYr","pdf",6663259,140,"English","# Safety Considerations\n# General\n## Conventions Used in This Manual\n# Major System Components\n## Main Base Board (MBB)\n## Auxiliary (AUX) Board\n## Electronic Expansion Valve (EXV) Board\n## Compressor Protection Module (CPM)\n## Energy Management Module (EMM)\n## Enable/Off/Remote Contact Switch\n## Emergency On/Off Switch\n## Board Addresses\n## Control Module Status LEDs\n## Carrier Comfort Network (CCN) Interface\n# Controls Operation\n## Electronic Expansion Valve (EXV)\n## Oil Pumps\n## Motor Cooling\n## Sensors\n## Compressor Protection Module (CPM)\n## Starting Options and Capacity Control\n## Head Pressure Control\n## Control Methods\n## Cooling Set Point Select and Ice Mode\n## Pump Control (30HXC)\n## Navigator™ Display Module Usage\n## Service Test\n## Configuring and Operating Dual Chiller Control\n## Alarms/Alerts\n## Run Hours and Starts\n## Temperature Reset\n## Demand Limit\n## Cooling Set Point (4 to 20 mA)\n# Troubleshooting\n## Checking Display Codes\n## Unit Shutoff and Restart Procedure\n## Alarms and Alerts\n## EXV Troubleshooting Procedure\n## Servicing and Maintenance Tasks\n## Refrigerant Charging and Oil Recharging\n# Pre-Start-Up Procedure\n# Start-Up and Operation\n## Actual Start-Up\n## Operating Sequence\n## Field Wiring\n# Appendices\n## Capacity Loading Sequence\n## Available Accessories\n## Cooler and Condenser Pressure Drop\n## Typical System Components\n## CCN Configuration\n## Maintenance Summary and Log Sheets\n## BACnet Option\n## Wiring Diagrams\n# Start-Up Checklist","[{\"question\":\"What safety precautions does the manual require before installing, starting up, or servicing the equipment?\",\"answer\":\"Installation, start-up, and servicing can be hazardous due to system pressures, electrical components, and location. Only trained, qualified personnel should work on the unit, and all applicable safety codes plus PPE such as safety glasses and gloves are required.\"},{\"question\":\"How should power be handled during installation and service?\",\"answer\":\"Shut off all power to the equipment during installation and service, and note there may be more than one disconnect switch. Tag each disconnect location so others do not restore power until work is completed.\"},{\"question\":\"What procedure does the manual emphasize for removing components that contain oil and refrigerant under pressure?\",\"answer\":\"Do not use a torch. Shut off electrical power, recover refrigerant to relieve all pressure using both high- and low-pressure ports, and use protective gloves and goggles while proceeding with component removal.\"}]","Condenserless and Water-Cooled Chillers with ComfortLink Controls 50/60 Hz, Series 9 - Controls, Start-Up, Operation, Service, and Troubleshooting - 30HX-2T | PDF",353]