Carrier 19XL specifications Before Initial START-UP, Job Data Required, Equipment Required

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Safety Shutdown Ð A safety shutdown is identical to a manual shutdown with the exception that the LID will dis- play the reason for the shutdown, the alarm light will blink continuously, and the spare alarm contacts will be ener-

gized. A safety shutdown requires that the RESET softkey

be pressed in order to clear the alarm. If the alarm is still present, the alarm light will continue to blink. Once the alarm

is cleared, the operator must press the CCN or LOCAL softkeys to restart the chiller.

Do not reset starter loads or any other starter safety for 30 seconds after the compressor has stopped. Voltage output to the compressor start signal is maintained for 10 seconds to determine starter fault.

BEFORE INITIAL START-UP

Job Data Required

·list of applicable design temperatures and pressures (pro- duct data submittal)

·chiller certi®ed prints

·starting equipment details and wiring diagrams

·diagrams and instructions for special controls or options

·19XL Installation Instructions

·pumpout unit instructions

Equipment Required

·mechanic's tools (refrigeration)

·digital volt-ohmmeter (DVM)

·clamp-on ammeter

·electronic leak detector

·absolute pressure manometer or wet-bulb vacuum indica- tor (Fig. 25)

·500 v insulation tester (megohmmeter) for compressor motors with nameplate voltage of 600 v or less, or a 5000-v insulation tester for compressor motor rated above 600 v

Fig. 25 Ð Typical Wet-Bulb Type

Vacuum Indicator

Using the Optional Storage Tank and Pumpout

System Ð Refer to Pumpout and Refrigerant Transfer Procedures section, page 59 for: pumpout system prepara- tion, refrigerant transfer, and chiller evacuation.

Remove Shipping Packaging Ð Remove any packaging material from the control center, power panel, guide vane actuator, motor cooling and oil reclaim solenoids, motor and bearing temperature sensor covers, and the factory- mounted starter.

Open Oil Circuit Valves Ð Check that the oil ®lter isolation valves (Fig. 4) are open by removing the valve cap and checking the valve stem.

Tighten All Gasketed Joints and Guide Vane Shaft Packing Ð Gaskets and packing normally relax by the time the chiller arrives at the jobsite. Tighten all gasketed joints and guide vane shaft packing to ensure a leak- tight chiller.

Check Chiller Tightness Ð Figure 26 outlines the proper sequence and procedures for leak testing.

19XL chillers are shipped with the refrigerant contained in the condenser shell and the oil charge shipped in the compressor. The cooler will have a 15 psig (103 kPa) refrigerant charge. Units may be ordered with the refrigerant shipped separately, along with a 15 psig (103 kPa) nitrogen- holding charge in each vessel. To determine if there are any leaks, the chiller should be charged with refrigerant. Use an electronic leak detector to check all ¯anges and solder joints after the chiller is pressurized. If any leaks are detected, fol- low the leak test procedure.

If the chiller is spring isolated, keep all springs blocked in both directions in order to prevent possible piping stress and damage during the transfer of refrigerant from vessel to vessel during the leak test process, or any time refrigerant is transferred. Adjust the springs when the refrigerant is in operating condition, and when the water circuits are full.

Refrigerant Tracer Ð Carrier recommends the use of an environmentally acceptable refrigerant tracer for leak test- ing with an electronic detector or halide torch.

Ultrasonic leak detectors also can be used if the chiller is under pressure.

Do not use air or oxygen as a means of pressurizing the chiller. Some mixtures of HCFC-22 or HFC-134a and air can undergo combustion.

Leak Test Chiller Ð Due to regulations regarding refrigerant emissions and the difficulties associated with sepa- rating contaminants from refrigerant, Carrier recommends the following leak test procedures. See Fig. 26 for an outline of the leak test procedures. Refer to Fig. 27 and 28 during pumpout procedures and Tables 5A, B, C, and D for refrig- erant pressure/temperature values.

1.If the pressure readings are normal for chiller condition:

a.Evacuate the holding charge from the vessels, if present.

b.Raise the chiller pressure, if necessary, by adding re- frigerant until pressure is at equivalent saturated pres- sure for the surrounding temperature. Follow the pumpout

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Contents Safety Considerations Start-Up, Operation, and Maintenance InstructionsContents Contents Abbreviations and Explanations IntroductionMOTOR/OIL Refrigeration Cooling Cycle Chiller FamiliarizationRefrigeration Cycle 19XL Rear View Cooler In/Out Temperature Sensors Take-Apart Rabbet Fit ConnectorCondenser In/Out Temperature Sensors Cooler Pressure Schrader FittingRefrigerant Motor Cooling and Oil Cooling Cycles Lubrication CycleLubrication System Unit-Mounted Solid-State Starter Optional Starting EquipmentControls DenitionsMajor PIC Components Panel Locations PIC Component PanelPressure Transducer, Typical 19XL Controls and Sensor LocationsControl and OIL Heater Voltage Selector S1 Power Panel with OptionsSelect LID Operation and Menus FigGeneral Override Operations − Example of Point Status Screen Status01Example of Time Schedule Operation Screen 19XL Menu Structure 19XL Service Menu Structure 19XL Service Menu Structure Example of Set Point Screen SetpointLID Screens Description Range Units Reference Point Name Alarm HistoryExample 1 Ð STATUS01 Display Screen Menu Status SelectExample 3 Ð STATUS03 Display Screen Example 2 Ð STATUS02 Display ScreenExample 4 Ð Setpoint Display Screen MenuExample 6 Ð LEAD/LAG Configuration Display Screen Example 5 Ð Configuration Config Display ScreenECW Control Option ICE Build TerminationExample 7 Ð SERVICE1 Display Screen Spare Alert Enable Example 8 Ð SERVICE2 Display ScreenExample 9 Ð SERVICE3 Display Screen Menu ServiceExample 11 Ð Maintenance MAINT02 Display Screen Example 10 Ð Maintenance MAINT01 Display ScreenDischarge Temperature Bearing TemperatureDescription RANGE/STATUS Units Reference Point Name Example 12 Ð Maintenance MAINT03 Display ScreenExample 13 Ð Maintenance MAINT04 Display Screen PIC System Functions Page Protective Safety Limits and Control Settings Capacity Overrides Page Page ECW Lead/Lag ControlHgbp Hot Gas BypassPage Cent Capacity Ice Build ControlPage To LOG on Example of Attach to Network Device ScreenSequence Fig START-UP/SHUTDOWN/RECYCLERecycle Restart Delta T Before Initial START-UP Using the Optional Storage Tank and PumpoutJob Data Required Equipment Required19XL Leak Test Procedures Page Ð HCFC-22 Pressure Ð Temperature C Ð HCFC-22 Pressure Ð Temperature FTemperature Pressure Ð HFC-134a Pressure Ð Temperature FÐ HFC-134a Pressure Ð Temperature C Page Check Optional Pumpout Compressor Water Pip Inspect WiringMECHANICAL-TYPE Starters Check StarterBENSHAW, INC. SOLID-STATE Starter Benshaw, Inc. Solid-State Starter Power StackSet Up Chiller Control Conguration Power Up the Controls and Check the Oil HeaterLoad Surge Prevention Occurs TOO Soon Occurs TOO Late Volt Motor Code Amps Correction Factors For 19XL Motors19XL Chiller Equalization Without PUMP- OUT Unit Charge Refrigerant into ChillerControl Test Menu Functions Tests to be Devices Tested Performed19XL Total Refrigerant Charge Refrigerant ChargesCooler SizeCheck Rotation Initial START-UPDry Run to Test Start-Up Sequence Calibrate Motor Current Check Oil Pressure and Compressor StopOperating Instructions Operator DutiesTo Stop the Chiller Plant Operating the Optional Pumpout Compressor Pumpout and Refrigerant Transfer ProceduresTransfer Refrigerant from Storage Tank to Chiller TstatTransfer the Refrigerant from Chiller to Storage Tank Chillers with Isolation ValvesReturn Refrigerant to Normal Operating Conditions General MaintenanceTest After Service, Repair, or Major Leak Ð If Guide Vane Actuator Linkage Weekly MaintenanceTo Change the OIL Scheduled MaintenanceCheck Safety and Operating Controls Monthly Inspect the Heat Exchanger Tubes Compressor Bearing and Gear MaintenOptional Pumpout System Controls Troubleshooting Guide MAINT02 MAINT01MAINT03 MAINT04Timing OUT or Timed OUT Shutdown with ON/OFF/RESET-OFFAutorestart in Progress Recycle ShutdownNormal or AUTO.-RESTART LOW Chilled Water Compressor Jumpstart and Refrigerant Protection Normal RUN with RESET, TEMPERATURE, or DemandLimited Normal RUN Overrides Active AlertsOUT-OF-RANGE Sensor Failures Protective Limit Chiller Protect Limit FaultsSpare Sensor Alert Messages Chiller AlertsDESCRIPTION/MALFUNCTION Probable CAUSE/REMEDY Other PROBLEMS/MALFUNCTIONSTemperature Voltage Resistance Drop Ð Thermistor Temperature F vs Resistance/Voltage DropÐ Thermistor Temperature C vs Resistance/Voltage Drop Input Options Module Control ModulesModule Address Options Module Starter Management Module SMM FigProcessor Module Psio Fig Switch Options Setting Module InstallationTypical Benshaw, Inc. Solid-State Starter internal View Page Page Problem Probable Causes Area of Correction Benshaw, Inc. Solid-State Starter Troubleshooting GuideRV1 SCRAdditional Data for Marine Waterboxes Heat Exchanger DataCooler CondenserCoolers Waterbox Cover WeightsCondensers 1034 kPaOptional Pumpout System Electrical Data Compressor/Motor WeightsCompressor Weights Compressor Fits and Clearances Description Torque Compressor Assembly TorquesFt-lb ``ZCOM CLRComm EXTPage CLR Page Chiller Power Panel, Starter Assembly Motor Wiring Schematic Chiller Power Panel, Starter Assembly Motor Wiring Schematic POT PMRGFR 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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