Carrier 19XL specifications Ice Build Control, Cent Capacity

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4.Lead chiller temperature pulldown rate of the CHILLED WATER temperature is less than 0.5° F (0.27° C) per minute.

5.The lag chiller status indicates it is in CCN mode and is not faulted. If the current lag chiller is in an alarm con- dition, then the standby chiller becomes the active lag chiller, if it is con®gured and available.

6.The con®gured LAG START TIMER entry has elapsed. The LAG START TIMER shall be started when the lead chiller ramp loading is completed. The LAG START TIMER entry is accessed by selecting Lead/Lag from the Equip- ment Con®guration table of the Service menu.

When all of the above requirements have been met, the lag chiller is forced to a START mode. The PIC control then monitors the lag chiller for a successful start. If the lag chiller fails to start, the standby chiller, if con®gured, is started.

Lag Chiller Shutdown Requirements Ð The following con- ditions must be met in order for the lag chiller to be stopped.

1.Lead chiller COMPRESSOR MOTOR LOAD value is less than the lead chiller percent capacity plus 15%.

NOTE: Lead chiller percent capacity = 100 ± LAG PER-

CENT CAPACITY

The LAG PERCENT CAPACITY value is con®gured on the Lead/Lag Con®guration screen.

2.The lead chiller chilled water temperature is less than the CONTROL POINT plus 1¤2 of the WATER/BRINE DEADBAND.

3.The con®gured LAG STOP TIMER entry has elapsed. The LAG STOP TIMER is started when the CHILLED WATER TEMPERATURE is less than the CHILLED WATER CONTROL POINT plus 1¤2 of the WATER/ BRINE DEADBAND and the lead chiller COMPRESSOR MOTOR LOAD is less than the lead chiller percent capacity plus 15%. The timer is ignored if the chilled water temperature reaches 3° F (1.67° C) below the CON- TROL POINT and the lead chiller COMPRESSOR MOTOR LOAD value is less than the lead chiller percent capacity plus 15%.

FAULTED CHILLER OPERATION Ð If the lead chiller shuts down on an alarm (*) condition, it stops communica- tion to the lag and standby chillers. After 30 seconds, the lag chiller will now become the acting lead chiller and will start and stop the standby chiller, if necessary.

If the lag chiller faults when the lead chiller is also faulted, the standby chiller reverts to a stand-alone CCN mode of operation.

If the lead chiller is in an alarm (*) condition (as shown

on the LID panel), the RESET softkey is pressed to clear

the alarm, and the chiller is placed in the CCN mode, the lead chiller will now communicate and monitor the RUN STATUS of the lag and standby chillers. If both the lag and standby chillers are running, the lead chiller will not attempt to start and will not assume the role of lead chiller until either the lag or standby chiller shuts down. If only one chiller is running, the lead chiller will wait for a start request from the operating chiller. When the con®gured lead chiller starts, it assumes its role as lead chiller.

LOAD BALANCING Ð When the LOAD BALANCE OPTION is enabled, the lead chiller will set the ACTIVE DEMAND LIMIT in the lag chiller to the lead chiller's COM- PRESSOR MOTOR LOAD value. This value has limits of 40% to 100%. When setting the lag chiller ACTIVE DEMAND LIMIT, the CONTROL POINT will be modi- ®ed to a value of 3° F (1.67° C) less than the lead chiller's CONTROL POINT value. If the LOAD BALANCE OPTION

is disabled, the ACTIVE DEMAND LIMIT and the CON- TROL POINT are forced to the same value as the lead chiller.

AUTO. RESTART AFTER POWER FAILURE Ð When an auto. restart condition occurs, each chiller may have a delay added to the start-up sequence, depending on its lead/ lag con®guration. The lead chiller does not have a delay. The lag chiller has a 45-second delay. The standby chiller has a 90-second delay. The delay time is added after the chiller water ¯ow veri®cation. The PIC controls ensure that the guide vanes are closed. After the guide vane position is con®rmed, the delay for lag and standby chiller occurs prior to ener- gizing the oil pump. The normal start-up sequence then continues. The auto. restart delay sequence occurs whether the chiller is in CCN or LOCAL mode and is intended to stagger the compressor motors from being energized simul- taneously. This will help reduce the inrush demands on the building power system.

Ice Build Control

IMPORTANT: The Ice Build control option is only avail- able on chillers with PSIO Software Version 09 and higher.

Ice build control automatically sets the chilled WATER/ BRINE CONTROL POINT of the chiller to a temperature where an ice building operation for thermal storage can be accomplished.

The PIC can be con®gured for ice build operation. Con- ®guration of ice build control is accomplished through entries in the Con®g table, Ice Build Setpoint table, and the Ice Build Time Schedule table. Figures 16 and 17 show how to access each entry.

The Ice Build Time Schedule de®nes the period during which ice build is active if the ice build option is ENABLED. If the Ice Build Time Schedule overlaps other schedules de®ning time, then the Ice Build Time Schedule shall take priority. During the ice build period, the WATER/ BRINE CONTROL POINT is set to the ICE BUILD SET POINT for temperature control. The ICE BUILD RECYCLE OPTION and ICE BUILD TERMINATION entries from a screen in the Con®g (con®guration) table provide options for chiller recycle and termination of ice build cycle, respec- tively. Termination of ice build can result from the ENTER- ING CHILLED WATER/BRINE temperature being less than the ICE BUILD SET POINT, opening of the REMOTE CON- TACT inputs from an ice level indicator, or reaching the end of the Ice Build Time Schedule.

ICE BUILD INITIATION Ð The Ice Build Time Schedule provides the means for activating ice build. The ice build time table is named OCCPC02S.

If the Ice Build Time Schedule is OCCUPIED and the ICE BUILD OPTION is ENABLED, then ice build is active and the following events automatically take place (unless over- ridden by a higher authority CCN device):

1.Force CHILLER START/STOP to START.

2.Force WATER/BRINE CONTROL POINT to the ICE BUILD SET POINT.

3.Remove any force (Auto) on the ACTIVE DEMAND LIMIT.

NOTE: Items 1-3 (shown above) shall not occur if the chiller is con®gured and operating as a lag or standby chiller for lead/lag and is actively controlled by a lead chiller. The lead chiller communicates the ICE BUILD SET POINT, desired CHILLER START/STOP state, and ACTIVE DEMAND LIMIT to the lag or standby chiller as required for ice build, if con- ®gured to do so.

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Contents Start-Up, Operation, and Maintenance Instructions Safety ConsiderationsContents Contents Introduction Abbreviations and ExplanationsChiller Familiarization Refrigeration CycleMOTOR/OIL Refrigeration Cooling Cycle 19XL Rear View Take-Apart Rabbet Fit Connector Cooler In/Out Temperature SensorsCondenser In/Out Temperature Sensors Cooler Pressure Schrader FittingLubrication Cycle Refrigerant Motor Cooling and Oil Cooling CyclesLubrication System Starting Equipment Unit-Mounted Solid-State Starter OptionalDenitions ControlsMajor PIC Components Panel Locations PIC Component Panel19XL Controls and Sensor Locations Pressure Transducer, TypicalPower Panel with Options Control and OIL Heater Voltage Selector S1LID Operation and Menus Fig GeneralSelect − Example of Point Status Screen Status01 Override OperationsExample of Time Schedule Operation Screen 19XL Menu Structure 19XL Service Menu Structure 19XL Service Menu Structure Setpoint Example of Set Point ScreenDescription Range Units Reference Point Name Alarm History LID ScreensExample 1 Ð STATUS01 Display Screen Menu Status SelectExample 2 Ð STATUS02 Display Screen Example 3 Ð STATUS03 Display ScreenExample 4 Ð Setpoint Display Screen MenuExample 5 Ð Configuration Config Display Screen Example 6 Ð LEAD/LAG Configuration Display ScreenECW Control Option ICE Build TerminationExample 7 Ð SERVICE1 Display Screen Example 8 Ð SERVICE2 Display Screen Spare Alert EnableExample 9 Ð SERVICE3 Display Screen Menu ServiceExample 10 Ð Maintenance MAINT01 Display Screen Example 11 Ð Maintenance MAINT02 Display ScreenDischarge Temperature Bearing TemperatureExample 12 Ð Maintenance MAINT03 Display Screen Example 13 Ð Maintenance MAINT04 Display ScreenDescription RANGE/STATUS Units Reference Point Name PIC System Functions Page Protective Safety Limits and Control Settings Capacity Overrides Page Page Lead/Lag Control ECWHgbp Hot Gas BypassPage Ice Build Control Cent CapacityPage Example of Attach to Network Device Screen To LOG onSTART-UP/SHUTDOWN/RECYCLE Sequence FigRecycle Restart Delta T Using the Optional Storage Tank and Pumpout Before Initial START-UPJob Data Required Equipment Required19XL Leak Test Procedures Page Ð HCFC-22 Pressure Ð Temperature F Ð HCFC-22 Pressure Ð Temperature CÐ HFC-134a Pressure Ð Temperature F Ð HFC-134a Pressure Ð Temperature CTemperature Pressure Page Inspect Wiring Check Optional Pumpout Compressor Water PipCheck Starter MECHANICAL-TYPE StartersBenshaw, Inc. Solid-State Starter Power Stack BENSHAW, INC. SOLID-STATE StarterPower Up the Controls and Check the Oil Heater Set Up Chiller Control CongurationLoad Surge Prevention Occurs TOO Soon Occurs TOO Late Amps Correction Factors For 19XL Motors Volt Motor CodeCharge Refrigerant into Chiller 19XL Chiller Equalization Without PUMP- OUT UnitControl Test Menu Functions Tests to be Devices Tested PerformedRefrigerant Charges 19XL Total Refrigerant ChargeCooler SizeInitial START-UP Dry Run to Test Start-Up SequenceCheck Rotation Check Oil Pressure and Compressor Stop Calibrate Motor CurrentOperating Instructions Operator DutiesTo Stop the Chiller Plant Pumpout and Refrigerant Transfer Procedures Operating the Optional Pumpout CompressorTransfer Refrigerant from Storage Tank to Chiller TstatChillers with Isolation Valves Transfer the Refrigerant from Chiller to Storage TankGeneral Maintenance Test After Service, Repair, or Major Leak Ð IfReturn Refrigerant to Normal Operating Conditions Weekly Maintenance Guide Vane Actuator LinkageScheduled Maintenance Check Safety and Operating Controls MonthlyTo Change the OIL Compressor Bearing and Gear Mainten Inspect the Heat Exchanger TubesOptional Pumpout System Controls Troubleshooting Guide MAINT01 MAINT02MAINT03 MAINT04Shutdown with ON/OFF/RESET-OFF Timing OUT or Timed OUTRecycle Shutdown Normal or AUTO.-RESTARTAutorestart in Progress LOW Chilled Water Normal RUN with RESET, TEMPERATURE, or Demand Compressor Jumpstart and Refrigerant ProtectionNormal RUN Overrides Active Alerts OUT-OF-RANGE Sensor FailuresLimited Chiller Protect Limit Faults Protective LimitChiller Alerts Spare Sensor Alert MessagesOther PROBLEMS/MALFUNCTIONS DESCRIPTION/MALFUNCTION Probable CAUSE/REMEDYÐ Thermistor Temperature F vs Resistance/Voltage Drop Temperature Voltage Resistance DropÐ Thermistor Temperature C vs Resistance/Voltage Drop Control Modules Module AddressInput Options Module Starter Management Module SMM Fig Processor Module Psio FigOptions Module Installation Switch Options Setting ModuleTypical Benshaw, Inc. Solid-State Starter internal View Page Page Benshaw, Inc. Solid-State Starter Troubleshooting Guide Problem Probable Causes Area of CorrectionRV1 SCRHeat Exchanger Data Additional Data for Marine WaterboxesCooler CondenserWaterbox Cover Weights CoolersCondensers 1034 kPaCompressor/Motor Weights Compressor WeightsOptional Pumpout System Electrical Data Compressor Fits and Clearances Compressor Assembly Torques Description TorqueFt-lb ``ZCLR COMComm EXTPage CLR Page Chiller Power Panel, Starter Assembly Motor Wiring Schematic Chiller Power Panel, Starter Assembly Motor Wiring Schematic PMR POTGFR HPSTypical Wye-Delta Unit Mounted Starter Wiring Schematic Index Index Copyright 1996 Carrier Corporation

19XL specifications

The Carrier 19XL is a highly regarded commercial heating and cooling solution, designed to provide optimum performance and energy efficiency in various applications. This rooftop unit is engineered to meet the diverse needs of businesses, making it an ideal choice for those requiring reliable climate control in their facilities.

One of the standout features of the Carrier 19XL is its advanced cooling and heating capabilities. The unit utilizes a high-efficiency scroll compressor that ensures a quieter operation and improved reliability. The system can operate across a wide range of temperatures, making it versatile for various climates. Additionally, it offers both cooling and heating options, allowing for year-round comfort.

Energy efficiency is a focal point of the 19XL design. With an impressive Seasonal Energy Efficiency Ratio (SEER) and Heating Seasonal Performance Factor (HSPF), this unit not only helps reduce energy costs but also supports environmental sustainability initiatives. The unit is equipped with environmentally friendly refrigerants, further contributing to lower greenhouse gas emissions.

The Carrier 19XL features a user-friendly control system, allowing for easy monitoring and management of the unit's performance. This control system is designed to maximize energy savings, offering features such as demand control ventilation and integrated economizers that facilitate the use of outdoor air for cooling, reducing reliance on mechanical systems when conditions allow.

Construction-wise, the Carrier 19XL is built to withstand tough environmental conditions. Its robust cabinet is made from galvanized steel, providing durability and protection against the elements. The design also includes insulation to minimize noise levels, creating a more comfortable indoor environment.

Maintenance is a key consideration in the design of the 19XL. The unit features accessible service ports and a simplified access panel, allowing technicians to perform routine maintenance with ease. This proactive design helps ensure the longevity of the system and minimizes downtime, keeping operations running smoothly.

In summary, the Carrier 19XL is an exceptional choice for commercial heating and cooling needs. With its energy-efficient features, advanced technology, and durable construction, it stands out as a reliable solution for businesses looking for sustainable climate control options.
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