Carrier 19XR, XRV specifications

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Ramp Loading — The ramp loading control slows down the rate at which the compressor loads up. This control can pre- vent the compressor from loading up during the short period of time when the chiller is started and the chilled water loop has to be brought down to CONTROL POINT. This helps reduce electrical demand charges by slowly bringing the chilled water to CONTROL POINT. The total power draw during this period remains almost unchanged.

There are two methods of ramp loading with the PIC II. Ramp loading can be based on chilled water temperature or on motor load. Either method is selected from the RAMP__DEM screen.

1.Temperature ramp loading (TEMP PULLDOWN DEG/ MIN) limits the degrees per minute rate at which either leaving chilled water or entering chilled water tempera- ture decreases. This rate is configured by the operator on the TEMP_CTL screen. The lowest temperature ramp rate will also be used if chiller power has been off for 3 hours or more (even if the motor ramp load is selected as the ramp loading method).

2.Motor load ramp loading (LOAD PULLDOWN) limits the degrees per minute rate at which the compressor mo- tor current or compressor motor load increases. The LOAD PULLDOWN rate is configured by the operator on the RAMP_DEM screen in amps or kilowatts. The point name is MOTOR LOAD RAMP%/MIN.

If kilowatts is selected for the DEMAND LIMIT SOURCE, the MOTOR RATED KILOWATTS must be entered (informa- tion found on the chiller Requisition form).

The TEMP PULLDOWN DEG/MIN may be viewed or modified on the TEMP_CTL screen which is accessed from the EQUIPMENT SERVICE screen. PULLDOWN RAMP TYPE, DEMAND LIMIT SOURCE, and MOTOR LOAD RAMP %/MIN may be viewed or modified on the RAMP_DEM screen.

Capacity Override (Table 4) — Capacity overrides can prevent some safety shutdowns caused by exceeding the motor amperage limit, refrigerant low temperature safety limit, motor high temperature safety limit, and condenser high pressure limit. In all cases there are 2 stages of compressor vane control.

1.The vanes are prevented from opening further, and the status line on the CVC/ICVC indicates the reason for the override.

2.The vanes are closed until the condition decreases to be- low the first step set point. Then the vanes are released to normal capacity control.

Whenever the motor current demand limit set point (ACTIVE DEMAND LIMIT) is reached, it activates a capacity override, again, with a 2-step process. Exceeding 110% of the rated load amps for more than 30 seconds will initiate a safety shutdown.

The compressor high lift (surge prevention) set point will cause a capacity override as well. When the surge prevention set point is reached, the controller normally will only prevent the guide vanes from opening. If so equipped, the hot gas by- pass valve will open instead of holding the vanes. See the Surge Prevention Algorithm section, page 39.

High Discharge Temperature Control — If the discharge temperature increases above 160 F (71.1 C), the guide vanes are proportionally opened to increase gas flow through the compressor. If the leaving chilled water tempera- ture is then brought 5° F (2.8° C) below the control set point temperature, the PIC II will bring the chiller into the recycle mode.

Oil Sump Temperature Control — The oil sump temperature control is regulated by the PIC II, which uses the oil heater relay when the chiller is shut down.

As part of the pre-start checks executed by the controls, the oil sump temperature (OIL SUMP TEMP) is compared to the cooler refrigerant temperature (EVAPORATOR REFRIG TEMP). If the difference between these 2 temperatures is 50 F (27.8 C) or less, the start-up will be delayed until the oil tem- perature is 50 F (27.8 C) or more. Once this temperature is con- firmed, the start-up continues.

The oil heater relay is energized whenever the chiller com- pressor is off and the oil sump temperature is less than 140 F (60.0 C) or the oil sump temperature is less than the cooler re- frigerant temperature plus 53° F (11.7° C). The oil heater is turned off when the oil sump temperature is either

•more than 152 F (66.7 C), or

•more than 142 F (61.1 C) and more than the cooler refrigerant temperature plus 55° F (12.8° C).

The oil heater is always off during start-up or when the compressor is running.

The oil pump is also energized during the time the oil is be- ing heated (for 60 seconds at the end of every 30 minutes).

Oil Cooler — The oil must be cooled when the compres- sor is running. This is accomplished through a small, plate-type heat exchanger (also called the oil cooler) located behind the oil pump. The heat exchanger uses liquid condenser refrigerant as the cooling liquid. Refrigerant thermostatic expansion valves (TXVs) regulate refrigerant flow to control the oil tem- perature entering the bearings. The bulbs for the expansion valves are strapped to the oil supply line leaving the heat ex- changer, and the valves are set to maintain 110 F (43 C).

NOTE: The TXVs are not adjustable. The oil sump tempera- ture may be at a lower temperature during compressor operations.

Remote Start/Stop Controls — A remote device, such as a timeclock that uses a set of contacts, may be used to start and stop the chiller. However, the device should not be pro- grammed to start and stop the chiller in excess of 2 or 3 times every 12 hours. If more than 8 starts in 12 hours (the STARTS IN 12 HOURS parameter on the MAINSTAT screen) occur, an excessive starts alarm displays, preventing the chiller from

starting. The operator must press the RESET softkey on the CVC/ICVC to override the starts counter and start the chiller. If the chiller records 12 starts (excluding recycle starts) in a sliding 12-hour period, it can be restarted only by pressing the

RESET softkey followed by the LOCAL or CCN softkey. This ensures that, if the automatic system is malfunctioning, the chiller will not repeatedly cycle on and off. If the automatic restart after a power failure option (AUTO RESTART OPTION on the OPTIONS screen) is not activated when a power failure occurs, and if the remote contact is closed, the chiller will indi- cate an alarm because of the loss of voltage.

The contacts for remote start are wired into the starter at ter- minal strip J2, terminals 5 and 6 on the ISM. See the certified drawings for further details on contact ratings. The contacts must have 24 vac dry contact rating.

Spare Safety Inputs — Normally closed (NC) discrete inputs for additional field-supplied safeties may be wired to the spare protective limits input channel in place of the factory- installed jumper. (Wire multiple inputs in series.) The opening of any contact will result in a safety shutdown and a display on the CVC/ICVC. Refer to the certified drawings for safety con- tact ratings.

Analog temperature sensors may also be added to the mod- ule (SPARE TEMP #1 and #2). The analog temperature sen- sors may be configured to cause an alert or alarm on the CCN network. The alert will not shut the chiller down. Configuring for alarm state will cause the chiller to shut down.

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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 OptionalUnit-Mounted Wye-Delta Starter Optional ControlsDefinitions 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 2 Maintstat Display Screen Description Status Units PointExample 3 Startup Display Screen Startup Description Status Units PointExample 4 Compress Display Screen Example 5 Heatex Display ScreenExample 6 Power Display Screen Example 7 Ismstat Display ScreenMenu Setpoint Select Description Status Units Point Default Example 8 CVC/ICVCPSWD Display ScreenCVC Icvc Description Status Units Point Example 9 Setpoint Display ScreenExample 11 Override Display Screen Control Algorithm Status Override Description Units PointExample 12 Llmaint Display Screen Example 13 Ismhist Display Screen Example 14 Wsmdefme Display ScreenControl Algorithm Status Wsmdefme Description Units Point ISM Starter Config Data Ismconf Description Status Units Point DefaultExample 15 Netopt Display Screen Example 16 Ismconf Display ScreenExample 18 SETUP1 Display Screen Spare ALERT/ALARM EnableExample 17 Options Display Screen Example 19 SETUP2 Display Screen Example 20 Leadlag Display ScreenLAG=2, STANDBY=3 Description Status Units Point Default Reset TypeExample 21 Rampdem Display Screen Example 22 Tempctl Display ScreenNormal Control mode occurs when Active Delta T Surge Prevention Mode occurs when Active Delta TMode IGV VFD 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 Default CVC/ICVC screen, press the Menu START-UP/SHUTDOWNRecycle Sequence Fig Local Start-Up Local start-up or a manual start-up isEntering Condenser Water temperature plus 3 F -1.6C Before Initial START-UP Job Data RequiredEquipment Required 19XR Leak Test Procedures Page Page HFC-134a Pressure Temperature F HFC-134a Pressure Temperature CTemperature Pressure Inspect Wiring Perform dehydration as followsCheck Starter Manufacturer Cable noWhite G Software Configuration Parameter Benshaw RediStart Micro Menu Items Verify VFD Configuration and Change Parameters if Necessary VFD Title Setting Parameter Description SettingDescription Settings 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 Charge Refrigerant into Chiller Control Test Menu FunctionsTests to be Devices Tested Performed Initial START-UP Refrigerant HFC-134a ChargeDry Run to Test Start-Up Sequence Check Motor RotationCheck Oil Pressure and Compressor Stop Operating Instructions Operator DutiesTo Start the Chiller To Stop the ChillerPumpout and Refrigerant Transfer Procedures Operating the Optional Pumpout UnitDate Cooler Condenser Compressor TimeBearing 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 TransducersHeatex LlmaintOccdefcm Terminate Pumpdown Mode Shutdown in ProgressICE Build Ready to StartPrestart AlertAutorestart in Progress Running Temp ControlFault RUN CapacityLimited SensorProtective Failure toStart StopLoss CommunicationPotential FREEZE-UPSensor Alert LOW OIL PressureAutorestart PendingPressure Alert RecycleOption Sensor 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 ModulesChiller Control Module CCM Fig Integrated Starter Module FigReplacing Defective Processor Modules 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 Additional Miscellaneous Weights Optional Pumpout System Electrical DataMotor Voltage Code 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-240 to 100 10 to60.0 15 toCL-4 200 to 460105 to 115 85 to30 to 50 to20 to Psi CL-6150 to 90 to125 125 to65 to 90 to 100Amp 250 CL-8 25 to CL-950 to 145 CL-100000 to 02000000 to 0200 CL-11002 Power Module Dependent Selected motor 100% amps 004 To H.022 Job Sheet 60 for 60 Hz and 50 for 50 Hz028 10 to 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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