Carrier XRV, 19XR specifications Entering Condenser Water temperature plus 3 F -1.6C

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Shutdown Sequence — Chiller shutdown begins if any of the following occurs:

•the STOP button is pressed for at least one second (the alarm light blinks once to confirm the stop command)

•a recycle condition is present (see Chilled Water Recycle Mode section)

•the time schedule has gone into unoccupied mode

•the chiller protective limit has been reached and chiller is in alarm

•the start/stop status is overridden to stop from the CCN network or the CVC/ICVC

When a stop signal occurs, the shutdown sequence first stops the compressor by deactivating the start relay (1CR). A status message of “SHUTDOWN IN PROGRESS, COM- PRESSOR DEENERGIZED” is displayed, and the compres- sor ontime and service ontime stop. The guide vanes are then brought to the closed position. The oil pump relay and the chilled water/brine pump relay shut down 60 seconds after the compressor stops. The condenser water pump shuts down at the same time if the ENTERING CONDENSER WATER tem- perature is greater than or equal to 115 F (46.1 C) and the CONDENSER REFRIG TEMP is greater than the CONDENS- ER FREEZE POINT plus 5 F (–15.0 C). The stop-to-start timer now begins to count down. If the start-to-start timer value is still greater than the value of the start-to-stop timer, then this time displays on the CVC/ICVC.

Certain conditions that occur during shutdown can change this sequence.

•If the AVERAGE LINE CURRENT is greater than 5% after shutdown, or the starter contacts remain energized, the oil pump and chilled water pump remain energized and the alarm is displayed.

•The condenser pump shuts down when the CON- DENSER PRESSURE is less than the COND PRESS OVERRIDE threshold minus 3.5 psi (24.1 kPa) and the CONDENSER REFRIG TEMP is less than or equal to the

ENTERING CONDENSER WATER temperature plus 3° F (–1.6°C).

•If the chiller shuts down due to low refrigerant tempera- ture, the chilled water pump continues to run until the

LEAVING CHILLED WATER temperature is greater than the CONTROL POINT temperature, plus 5° F (3° C).

Automatic Soft Stop Amps Threshold — The soft stop amps threshold feature closes the guide vanes of the com- pressor automatically if a non-recycle, non-alarm stop signal occurs before the compressor motor is deenergized.

If the STOP button is pressed, the guide vanes close to a preset amperage percent until the guide vane is less than 4% open or 4 minutes have passed. The compressor then shuts off.

If the chiller enters an alarm state or if the compressor enters a RECYCLE mode, the compressor deenergizes immediately.

To activate the soft stop amps threshold feature, scroll to the bottom of OPTIONS screen on the CVC/ICVC. Use the

INCREASE or DECREASE softkey to set the SOFT STOP AMPS THRESHOLD parameter to the percent of amps at which the motor will shut down. The default setting is 100% amps (no soft stop). The range is 40 to 100%.

When the soft stop amps threshold feature is being applied, a status message, “SHUTDOWN IN PROGRESS, COM- PRESSOR UNLOADING” displays on the CVC/ICVC.

The soft stop amps threshold function can be terminated and the compressor motor deenergized immediately by depressing the STOP button twice.

Chilled Water Recycle Mode — The chiller may cycle off and wait until the load increases to restart when the compressor is running in a lightly loaded condition. This cy- cling is normal and is known as “recycle.” A recycle shutdown is initiated when any of the following conditions are true:

•the chiller is in LCW control, the difference between the LEAVING CHILLED WATER temperature and ENTER- ING CHILLED WATER temperature is less than the RECYCLE SHUTDOWN DELTA T (found in the

SETUP1 table) the LEAVING CHILLED WATER tem- perature is 5° F (2.8° C) below the CONTROL POINT, the CONTROL POINT has not increased in the last 5 minutes and ICE BUILD is not active.

•the ECW CONTROL OPTION is enabled, the difference between the ENTERING CHILLED WATER temperature and the LEAVING CHILLED WATER temperature is less than the RECYCLE SHUTDOWN DELTA T (found in the

SETUP1 table), the ENTERING CHILLED WATER tem- perature is 5° F (2.8° C) below the CONTROL POINT, and the CONTROL POINT has not increased in the last 5 minutes.

•the LEAVING CHILLED WATER temperature is within 3° F (2° C) of the EVAP REFRIG TRIPPOINT.

When the chiller is in RECYCLE mode, the chilled water pump relay remains energized so the chilled water temperature can be monitored for increasing load. The recycle control uses RESTART DELTA T to check when the compressor should be restarted. This is an operator-configured function which de- faults to 5° F (3° C). This value can be viewed or modified on the SETUP1 table. The compressor will restart when the chiller is:

•in LCW CONTROL and the LEAVING CHILLED WATER temperature is greater than the CONTROL POINT plus the RECYCLE RESTART DELTA T.

•in ECW CONTROL and the ENTERING CHILLED WATER temperature is greater than the CONTROL POINT plus the RECYCLE RESTART DELTA T.

Once these conditions are met, the compressor initiates a start-up with a normal start-up sequence.

An alert condition may be generated if 5 or more recycle start-ups occur in less than 4 hours. Excessive recycling can reduce chiller life; therefore, compressor recycling due to ex- tremely low loads should be reduced.

To reduce compressor recycling, use the time schedule to shut the chiller down during known low load operation period, or increase the chiller load by running the fan systems. If the hot gas bypass is installed, adjust the values to ensure that hot gas is energized during light load conditions. Increase the RECYCLE RESTART DELTA T on the SETUP1 table to lengthen the time between restarts.

The chiller should not be operated below design minimum load without a hot gas bypass installed.

Safety Shutdown — A safety shutdown is identical to a manual shutdown with the exception that, during a safety shutdown, the CVC/ICVC displays the reason for the shut- down, the alarm light blinks continuously, and the spare alarm contacts are energized.

After a safety shutdown, the RESET softkey must be pressed to clear the alarm. If the alarm condition is still present, the alarm light continues to blink. Once the alarm is cleared, the operator must press the CCN or LOCAL softkeys to re- start the chiller.

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Contents Safety Considerations Start-Up, Operation, and Maintenance InstructionsContents Contents Abbreviations and Explanations Introduction19XR Identification Chiller FamiliarizationTypical 19XR Components Motor and Lubricating OIL Cooling Cycle Refrigeration CycleLubrication Cycle VFD Cooling CycleUnit-Mounted Solid-State Starter Optional Starting EquipmentDefinitions Unit-Mounted Wye-Delta Starter OptionalControls Variable Frequency Drive VFD 19XR Controls and Sensor Locations PIC II Component Panel Location Major PIC II Components Panel LocationsControl Panel CVC/ICVC Operation and Menus Fig Example of Status Screen 19XR Chiller Display Menu Structure CVC/ICVC 19XR Service Menu Structure Time and Date Example of Time Schedule Operation Screen Example of Set Point Screen CVC/ICVC Display Data Example 1 Chiller Display Default ScreenStartup Description Status Units Point Example 2 Maintstat Display ScreenDescription Status Units Point Example 3 Startup Display ScreenExample 5 Heatex Display Screen Example 4 Compress Display ScreenExample 7 Ismstat Display Screen Example 6 Power Display ScreenExample 9 Setpoint Display Screen Menu Setpoint Select Description Status Units Point DefaultExample 8 CVC/ICVCPSWD Display Screen CVC Icvc Description Status Units PointExample 12 Llmaint Display Screen Example 11 Override Display ScreenControl Algorithm Status Override Description Units Point Control Algorithm Status Wsmdefme Description Units Point Example 13 Ismhist Display ScreenExample 14 Wsmdefme Display Screen Example 16 Ismconf Display Screen ISM Starter Config DataIsmconf Description Status Units Point Default Example 15 Netopt Display ScreenExample 17 Options Display Screen Example 18 SETUP1 Display ScreenSpare ALERT/ALARM Enable LAG=2, STANDBY=3 Example 19 SETUP2 Display ScreenExample 20 Leadlag Display Screen Example 22 Tempctl Display Screen Description Status Units Point DefaultReset Type Example 21 Rampdem Display ScreenPIC II System Functions Normal Control mode occurs when Active Delta TSurge Prevention Mode occurs when Active Delta T Mode IGV VFDPage Protective Safety Limits and Control Settings Page Capacity Overrides Evaporator Freeze Protection Icvc only a Page Head Pressure Reference Output Surge Protection Fixed Speed ChillerPage Page Point Example of Attach to Network Device Screen Example of Holiday Period Screen Local Start-Up Local start-up or a manual start-up is Default CVC/ICVC screen, press the MenuSTART-UP/SHUTDOWN Recycle Sequence FigEntering Condenser Water temperature plus 3 F -1.6C Equipment Required Before Initial START-UPJob Data Required 19XR Leak Test Procedures Page Page Temperature Pressure HFC-134a Pressure Temperature FHFC-134a Pressure Temperature C Perform dehydration as follows Inspect WiringWhite G Check StarterManufacturer Cable no Software Configuration Parameter Benshaw RediStart Micro Menu Items Verify VFD Configuration and Change Parameters if Necessary Description Settings VFD Title Setting ParameterDescription Setting Press Menu Press Status Press Compress Press Select Press Status Press Compress Press SelectLoad Surge Prevention Occurs TOO Soon Occurs TOO Late Estimated Minimum Load ConditionsCCM Temperature Thermistors Tests to be Devices Tested Performed Charge Refrigerant into ChillerControl Test Menu Functions Refrigerant HFC-134a Charge Initial START-UPCheck Oil Pressure and Compressor Stop Dry Run to Test Start-Up SequenceCheck Motor Rotation To Stop the Chiller Operating InstructionsOperator Duties To Start the ChillerOperating the Optional Pumpout Unit Pumpout and Refrigerant Transfer ProceduresFLA Date Cooler Condenser CompressorTime BearingValve Condition Turn off pumpout condenser waterChillers with Isolation Valves Test After Service, Repair, or Major Leak If General MaintenanceGuide Vane Actuator Linkage Weekly MaintenanceCheck Safety and Operating Controls Monthly Scheduled MaintenanceInspect the Heat Exchanger Tubes and Flow Devices Compressor Bearing and Gear MaintenanceOptional Pumpout System Controls Ordering Replacement Chiller Parts WhenChecking Pressure Transducers Troubleshooting GuideOccdefcm HeatexLlmaint Ready to Start Terminate Pumpdown ModeShutdown in Progress ICE BuildRunning Temp Control PrestartAlert Autorestart in ProgressSensor FaultRUN Capacity LimitedStop ProtectiveFailure to StartFREEZE-UP LossCommunication PotentialPending Sensor AlertLOW OIL Pressure AutorestartDiffuser Pressure AlertRecycle Option SensorDrop Thermistor Temperature F vs. Resistance/Voltage DropTemperature PIC Resistance Thermistor Temperature C vs. Resistance/Voltage DropControl Modules Power is connected to Plug J1 on each moduleReplacing Defective Processor Modules Chiller Control Module CCM FigIntegrated Starter Module Fig Integratedstartermodule Checked Measure SCR Pairs Recorded Being BetweenNumber of Tubes English Code Heat Exchanger Data EnglishNumber of Tubes Code Heat Exchanger Data SI19XR Additional Data for Marine Waterboxes Compressor WeightsEnglish Motor 19XR Motor Weights Standard and High Efficiency Motors19XR Waterbox Cover Weights English lb 19XR Waterbox Cover Weights SI kg Motor Voltage Code Additional Miscellaneous WeightsOptional Pumpout System Electrical Data Description Torque Compressor Assembly TorquesCompressor Code View B High Speed Shaft 19XR Compressor ClearancesAllen-Bradley Wye-Delta Unit-Mounted Starter 100101 ISM 102Temp 103104 105 106 107 Power Panel Wiring Schematic108 Cutler-Hammer Wye Delta Unit Mounted Starter Sizes 3-5DP109 Cutler-Hammer Wye Delta Unit Mounted Starter Size 6DPSeparate Metering Option Ground Fault Phase Current Option111 AUX 112FU Fuse 113114 VFD 115116 Typical Variable Frequency Drive VFD Wiring Schematic117 118 119 120 121 122 Index Index JOB Data Required Remove and use for job fileCL-2 Inspect Wiring and Record Electrical Data Ratings15 to 40 to 10010 to 60.0CL-4 85 to 200 to460 105 to 115CL-6 30 to50 to 20 to Psi125 to 150 to90 to 125Amp 250 CL-8 65 to90 to 100 CL-9 25 toCL-10 50 to 145CL-11 0000 to0200 0000 to 0200000 100 to Selected line voltage 002 Power Module Dependent Selected motor 100% amps004 To H.022 Job Sheet 60 for 60 Hz and 50 for 50 Hz 028 10 to Job Sheet 60 for 60 Hz and 50 for 50 HzCL-13 CL-14 CCN Local ResetPage Incurring obligations
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19XR, XRV specifications

The Carrier 19XR and 19XRV chillers are sophisticated cooling solutions that represent the forefront of HVAC technology. Designed for large commercial and industrial applications, these chillers provide exceptional performance, energy efficiency, and reliability, making them ideal for a variety of environments ranging from hospitals to manufacturing facilities.

One of the most significant features of the Carrier 19XR and 19XRV chillers is their advanced scroll compressor technology. These units employ a tandem scroll design that enhances efficiency while minimizing operational noise. This makes them ideal for urban environments where noise restrictions may be in place. Moreover, the compressors are equipped with variable speed drive options in the 19XRV model, which allows for greater energy savings by adjusting cooling output based on real-time demand.

In addition to their advanced compressors, the 19XR and 19XRV units incorporate the Carrier GreenChoice refrigerant, which has a lower global warming potential compared to traditional refrigerants. This innovative choice not only meets regulatory requirements but also contributes to sustainability goals, making these chillers a responsible choice for environmentally conscious organizations.

The units are engineered with a robust heat exchanger design, which enhances heat transfer efficiency and overall system performance. This ensures optimal operation even in extreme conditions. They feature a microprocessor-based control system that allows for precise monitoring and control of the chiller’s performance, enabling operators to make real-time adjustments to maximize energy efficiency.

The Carrier 19XR and 19XRV chillers also prioritize serviceability. The design incorporates easy access to key components, simplifying maintenance procedures and reducing downtime. This focus on maintainability extends the lifespan of the equipment, leading to lower lifecycle costs.

In terms of connectivity, these chillers are equipped with advanced Building Management System (BMS) integration capabilities. This allows for seamless monitoring and control of the chillers using a centralized platform, facilitating energy management and operational optimization.

Overall, the Carrier 19XR and 19XRV chillers stand out in the market for their blend of cutting-edge technology, energy efficiency, and user-friendly features. They are engineered to meet the demanding needs of modern commercial and industrial applications, making them a preferred choice for facility managers seeking reliable cooling solutions.
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