Carrier 19XR, XRV specifications Evaporator Freeze Protection Icvc only a

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Condenser Freeze Prevention — This control algo- rithm helps prevent condenser tube freeze-up by energizing the condenser pump relay. The PIC II controls the pump and, by starting it, helps to prevent the water in the condenser from freezing. The PIC II can perform this function whenever the chiller is not running except when it is either actively in pump- down or in pumpdown/lockout with the freeze prevention disabled.

When the CONDENSER REFRIG TEMP is less than or equal to the CONDENSER FREEZE POINT, the CONDENS- ER WATER PUMP is energized until the CONDENSER RE- FRIG TEMP is greater than the CONDENSER FREEZE POINT plus 5° F (2.7° C) and the ENTERING CONDENSER WATER TEMPERATURE is less than or equal to the CON- DENSER FREEZE POINT. An alarm is generated if the chiller is in PUMPDOWN mode and the pump is energized. An alert is generated if the chiller is not in PUMPDOWN mode and the pump is energized. If the chiller is in RECYCLE SHUT- DOWN mode, the mode will transition to a non-recycle shutdown.

Evaporator Freeze Protection (ICVC only) — A

refrigerant temperature sensor is installed at the bottom of the cooler to provide redundant freeze protection. In place of the cooler and condenser water pressure transducer inputs on the CCM is a 4.3k ohm resister and a jumper lead. When the EVAPORATOR REFRIGERANT TEMPERATURE is less than the EVAP REFRIG TRIPPOINT plus the REFRIG OVERRIDE DELTA T (configurable from 2° to 5°), state 122 will be displayed and a capacity override will occur. If the EVAPORATOR REFRIG TEMP is equal to or less than the EVAP Refrig TRIPPOINT, Protective Limit ALARM STATE 232 will be displayed and the unit will shut down.

Tower Fan Relay Low and High — Low condenser water temperature can cause the chiller to shut down when re- frigerant temperature is low. The tower fan relays, located in the starter, are controlled by the PIC II to energize and deener- gize as the pressure differential between cooler and condenser vessels changes. This prevents low condenser water tempera- ture and maximizes chiller efficiency. The tower fan relay can only accomplish this if the relay has been added to the cooling tower temperature controller.

The tower fan relay low is turned on whenever the condens- er water pump is running, flow is verified, and the difference between cooler and condenser pressure is more than 30 psid (207 kPad) for entering condenser water temperature greater than 65 F (18.3 C).

The tower fan relay low is turned off when the condenser pump is off, flow is stopped, or the cooler refrigerant tempera- ture is less than the override temperature for ENTERING CON- DENSER WATER temperature less than 62 F (16.7 C), or the differential pressure is less than 25 psid (172.4 kPad) for enter- ing condenser water less than 80 F (27 C).

The tower fan relay high is turned on whenever the condenser water pump is running, flow is verified and the dif- ference between cooler and condenser pressure is more than 35 psid (241.3 kPa) for entering condenser water temperature greater than the TOWER FAN HIGH SETPOINT (SETPOINT menu, default 75 F [23.9 C]).

The tower fan relay high is turned off when the condenser pump is off, flow is stopped, or the cooler refrigerant tempera- ture is less than the override temperature and ENTERING CONDENSER WATER is less than 70 F (21.1 C), or the differ- ence between cooler and condenser pressure is less than 28 Psid (193 kPa), or ENTERING CONDENSER WATER temperature is less than TOWER FAN HIGH SETPOINT minus 3 F (–16.1 C).

The TOWER FAN RELAY LOW and HIGH parameters are accessed from the STARTUP screen.

IMPORTANT: A field-supplied water temperature control system for condenser water should be installed. The system should maintain the leaving condenser water temperature at a temperature that is 20° F (11° C) above the leaving chilled water temperature.

The tower fan relay control is not a substitute for a con- denser water temperature control. When used with a water temperature control system, the tower fan relay control can be used to help prevent low condenser water temperatures.

Auto. Restart After Power Failure — This option may be enabled or disabled and may be viewed or modified on the OPTIONS screen, which is accessed from the EQUIP- MENT CONFIGURATION table. If the AUTO. RESTART OPTION is enabled, the chiller will start up automatically after a power failure has occurred (after a single cycle dropout; low, high, or loss of voltage; and the power is within ± 15% of nor- mal). The 15- and 5-minute inhibit timers are ignored during this type of start-up.

When power is restored after the power failure and if the compressor had been running, the oil pump will energize for one minute before energizing the cooler pump. AUTO. RESTART will then continue like a normal start-up.

If power to the CVC/ICVC module has been off for more than 3 hours or the timeclock has been set for the first time, start the compressor with the slowest temperature-based ramp load rate possible in order to minimize oil foaming.

The oil pump is energized occasionally during the time the oil is being brought up to proper temperature in order to elimi- nate refrigerant that has migrated to the oil sump during the power failure. The pump turns on for 60 seconds at the end of every 30-minute period until the chiller is started.

Water/Brine Reset — Three types of chilled water or brine reset are available and can be viewed or modified on the TEMP_CTL screen, which is accessed from the EQUIPMENT SERVICE table.

The CVC/ICVC default screen indicates when the chilled water reset is active. TEMPERATURE RESET on the MAIN- STAT screen indicates the amount of reset. The CONTROL POINT will be determined by adding the TEMPERATURE RESET to the SETPOINT.

To activate a reset type, access the TEMP_CTL screen and input all configuration information for that reset type. Then, in- put the reset type number (1, 2, or 3) in the SELECT/ENABLE RESET TYPE input line.

RESET TYPE 1: 4 to 20 mA (1 to 5 vdc) TEMPERATURE RESET — Reset Type 1 is an automatic chilled water temper- ature reset based on a remote temperature sensor input config- ured for either an externally powered 4 to 20 mA or a 1 to 5 vdc signal. Reset Type 1 permits up to ±30 F (±16 C) of automatic reset to the chilled water set point.

The auto, chilled water reset is hardwired to terminals

J5-3 (–) and J5-4 (+) on the CCM. Switch setting number 2 on SW2 will determine the type of input signal. With the switch set at the ON position the input is configured for an externally powered 4 to 20 mA signal. With the switch in the OFF posi- tion the input is configured for an external 1 to 5 vdc signal.

RESET TYPE 2: REMOTE TEMPERATURE RESET — Reset Type 2 is an automatic chilled water temperature reset based on a remote temperature sensor input signal. Reset Type 2 permits ± 30° F (± 16° C) of automatic reset to the set point based on a temperature sensor wired to the CCM module

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Contents Start-Up, Operation, and Maintenance Instructions Safety ConsiderationsContents Contents Introduction Abbreviations and ExplanationsChiller Familiarization 19XR IdentificationTypical 19XR Components Refrigeration Cycle Motor and Lubricating OIL Cooling CycleVFD Cooling Cycle Lubrication CycleStarting Equipment Unit-Mounted Solid-State Starter OptionalDefinitions Unit-Mounted Wye-Delta Starter OptionalControls Variable Frequency Drive VFD 19XR Controls and Sensor Locations Major PIC II Components Panel Locations PIC II Component Panel LocationControl 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 Example 1 Chiller Display Default Screen CVC/ICVC Display DataExample 3 Startup Display Screen Example 2 Maintstat Display ScreenDescription Status Units Point Startup Description Status Units PointExample 4 Compress Display Screen Example 5 Heatex Display ScreenExample 6 Power Display Screen Example 7 Ismstat Display ScreenCVC Icvc Description Status Units Point Menu Setpoint Select Description Status Units Point DefaultExample 8 CVC/ICVCPSWD Display Screen Example 9 Setpoint Display ScreenExample 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 15 Netopt Display Screen ISM Starter Config DataIsmconf Description Status Units Point Default Example 16 Ismconf 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 21 Rampdem Display Screen Description Status Units Point DefaultReset Type Example 22 Tempctl Display ScreenMode IGV VFD Normal Control mode occurs when Active Delta TSurge Prevention Mode occurs when Active Delta T PIC II System FunctionsPage Protective Safety Limits and Control Settings Page Capacity Overrides Evaporator Freeze Protection Icvc only a Page Surge Protection Fixed Speed Chiller Head Pressure Reference OutputPage Page Point Example of Attach to Network Device Screen Example of Holiday Period Screen Recycle Sequence Fig Default CVC/ICVC screen, press the MenuSTART-UP/SHUTDOWN Local Start-Up Local start-up or a manual start-up isEntering 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 Inspect Wiring Perform dehydration as followsWhite 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 Status Press Compress Press Select Press Menu Press Status Press Compress Press SelectEstimated Minimum Load Conditions Load Surge Prevention Occurs TOO Soon Occurs TOO LateCCM Temperature Thermistors Tests to be Devices Tested Performed Charge Refrigerant into ChillerControl Test Menu Functions Initial START-UP Refrigerant HFC-134a ChargeCheck Oil Pressure and Compressor Stop Dry Run to Test Start-Up SequenceCheck Motor Rotation To Start the Chiller Operating InstructionsOperator Duties To Stop the ChillerPumpout and Refrigerant Transfer Procedures Operating the Optional Pumpout UnitBearing Date Cooler Condenser CompressorTime FLATurn off pumpout condenser water Valve ConditionChillers with Isolation Valves General Maintenance Test After Service, Repair, or Major Leak IfWeekly Maintenance Guide Vane Actuator LinkageScheduled Maintenance Check Safety and Operating Controls MonthlyCompressor Bearing and Gear Maintenance Inspect the Heat Exchanger Tubes and Flow DevicesOrdering Replacement Chiller Parts When Optional Pumpout System ControlsTroubleshooting Guide Checking Pressure TransducersOccdefcm HeatexLlmaint ICE Build Terminate Pumpdown ModeShutdown in Progress Ready to StartAutorestart in Progress PrestartAlert Running Temp ControlLimited FaultRUN Capacity SensorStart ProtectiveFailure to StopPotential LossCommunication FREEZE-UPAutorestart Sensor AlertLOW OIL Pressure PendingOption Sensor Pressure AlertRecycle DiffuserThermistor Temperature F vs. Resistance/Voltage Drop DropThermistor Temperature C vs. Resistance/Voltage Drop Temperature PIC ResistancePower is connected to Plug J1 on each module Control ModulesReplacing Defective Processor Modules Chiller Control Module CCM FigIntegrated Starter Module Fig Integratedstartermodule Measure SCR Pairs Recorded Being Between CheckedHeat Exchanger Data English Number of Tubes English CodeHeat Exchanger Data SI Number of Tubes CodeCompressor Weights 19XR Additional Data for Marine Waterboxes19XR Motor Weights Standard and High Efficiency Motors English Motor19XR Waterbox Cover Weights English lb 19XR Waterbox Cover Weights SI kg Motor Voltage Code Additional Miscellaneous WeightsOptional Pumpout System Electrical Data Compressor Assembly Torques Description TorqueView B High Speed Shaft 19XR Compressor Clearances Compressor Code100 Allen-Bradley Wye-Delta Unit-Mounted Starter101 102 ISM103 Temp104 105 106 Power Panel Wiring Schematic 107Cutler-Hammer Wye Delta Unit Mounted Starter Sizes 3-5DP 108Cutler-Hammer Wye Delta Unit Mounted Starter Size 6DP 109Ground Fault Phase Current Option Separate Metering Option111 112 AUX113 FU Fuse114 115 VFDTypical Variable Frequency Drive VFD Wiring Schematic 116117 118 119 120 121 122 Index Index Remove and use for job file JOB Data RequiredInspect Wiring and Record Electrical Data Ratings CL-260.0 40 to 10010 to 15 toCL-4 105 to 115 200 to460 85 to20 to Psi 30 to50 to CL-6125 150 to90 to 125 toAmp 250 CL-8 65 to90 to 100 25 to CL-950 to 145 CL-100000 to 0200 0000 to0200 CL-11028 10 to Job Sheet 60 for 60 Hz and 50 for 50 Hz 002 Power Module Dependent Selected motor 100% amps004 To H.022 Job Sheet 60 for 60 Hz and 50 for 50 Hz 000 100 to Selected line voltageCL-13 CCN Local Reset CL-14Page 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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