Carrier AquaEdge 19XR series Start-up, Operation And Maintenance Instructions Manual

Also see for AquaEdge 19XR series: Installation instructions Start-up, operation and maintenance instructions

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Carrier AquaEdge 19XR series Start-up, Operation And Maintenance Instructions Manual Manual pdf 21 page image

21Table 2 — Standard Instrumentation SensorsA Refrigerant Saturation Temperature sensor (thermistor) islocated in the base of the evaporator, sensing refrigerant tem-perature directly. Evaporator and condenser water side differ-ential pressure transducers are not standard and are not re-quired. The ICVC software uses the evaporator saturation re-frigerant temperature in place of differential pressure flowdetection to provide evaporator freeze protection.Approach temperatures are shown in the HEAT_EX screen.EVAPORATOR APPROACH is defined as LEAVINGCHILLED WATER TEMPERATURE minus EVAPORATORREFRIGERANT TEMP (from the transducer). CONDENSERAPPROACH is defined as CONDENSER REFRIGERANTTEMP (derived from condenser pressure) minus LEAVINGCONDENSER WATER temperature. When the chiller is run-ning, the displayed value for either approach will not be lessthan 0.2° F (0.1° C). If either approach value exceeds the valueconfigured in the SETUP1 screen, the corresponding ApproachAlert message will be entered into the ALERT HISTORY ta-ble.ICVC Operation and Menus (Table 3 andFig. 17-23)GENERAL — The ICVC display automatically reverts to thedefault screen after 15 minutes if no softkey activity takes placeand if the chiller is not in the pumpdown mode (Fig. 17).If a screen other than the default screen is displayed on theICVC, the name of that screen is in the upper right corner (Fig.18).The ICVC may be set to display either English or SI units.Use the ICVC configuration screen (accessed from the Servicemenu) to change the units. See the Service Operation section,page 63.MODES• LOCAL — In LOCAL mode the PIC II accepts com-mands from the ICVC only and uses the local time occu-pancy schedule to determine chiller start and stop times.The PIC II can be placed in the local operating mode bypressing the LOCAL softkey. When RUN STATUS isREADY, the chiller will attempt to start up.• CCN — In CCN mode the PIC II accepts input from anyCCN interface or module (with the proper authority) aswell as from the local ICVC. The PIC II uses the CCNtime occupancy schedule to determine start and stopTYPE LOCATION MONITORED REMARKSTEMPERATUREEntering Chilled Water Cooler Inlet NozzleLeaving Chilled Water Cooler Outlet NozzleEntering Condenser Water Condenser Inlet NozzleLeaving Condenser Water Condenser Outlet NozzleEvaporator Saturation Sensor Well on Bottom of EvaporatorCompressor Discharge Compressor VoluteOil Sump Compressor Oil SumpCompressor Thrust Bearing Redundant Sensor ProvidedMotor Winding Redundant Sensor ProvidedPRESSUREEvaporator Relief Valve TeeCondenser Relief Valve TeeOil Sump Compressor Oil SumpOil Pump Discharge Oil Pump Discharge LineDiffuser (Compressor Internal) Only in Machines Equipped with Split Ring DiffusersEntering Chilled Water (Optional) Cooler Inlet NozzleLeaving Chilled Water(Optional) Cooler Outlet NozzleEntering Condenser Water Condenser Inlet NozzleLeaving Condenser Water Condenser Outlet NozzleANGULAR POSITIONGuide Vane Actuator Potentiometer Inside of ActuatorSplit Ring Diffuser Actuator (only on split ring dif-fuser equipped machines)Potentiometer Inside of the Actuator (Split Ring Diffuser Position isnot Displayed on the ICVC)PRESSURE SWITCH High Condenser (Discharge) Pressure Wired into the Starter Control CircuitTEMPERATURESWITCH Oil Pump Motor Winding Temperature Wired into the Oil Pump Control CircuitFig. 15 — Control Sensors (Temperature)SHRINK WRAPSTRAIN RELIEF1/8” NPTTHERMOWELLREMOVABLETEMPERATURESENSORFig. 16 — Temperature Sensor Usedwith Thermal Wella23-1624