Carrier 19XL specifications

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procedures in the Transfer Refrigerant from Storage Tank to Chiller section, Steps 1a-e, page 59.

Never charge liquid refrigerant into the chiller if the pressure in the chiller is less than 68 psig (469 kPa) for HCFC-22 and 35 psig (241 kPa) for HFC-134a. Charge as a gas only, with the cooler and condenser pumps running, until this pressure is reached, using PUMPDOWN LOCKOUT and TERMINATE LOCKOUT mode on the PIC. Flash- ing of liquid refrigerant at low pressures can cause tube freezeup and considerable damage.

c.Leak test chiller as outlined in Steps 3-9.

2.If the pressure readings are abnormal for chiller condition:

a.Prepare to leak test chillers shipped with refrigerant (Step 2h).

b.Check for large leaks by connecting a nitrogen bottle and raising the pressure to 30 psig (207 kPa). Soap test all joints. If the test pressure holds for 30 minutes, prepare the test for small leaks (Steps 2g-h).

c.Plainly mark any leaks which are found.

d.Release the pressure in the system.

e.Repair all leaks.

f.Retest the joints that were repaired.

g.After successfully completing the test for large leaks, remove as much nitrogen, air, and moisture as pos- sible, given the fact that small leaks may be present in the system. This can be accomplished by following the dehydration procedure, outlined in the Chiller Dehydration section, page 47.

h.Slowly raise the system pressure to a maximum of 210 psig (1448 kPa) but no less than 68 psig (469 kPa) for HCFC-22, 35 psig (241 kPa) for HFC-134a by add- ing refrigerant. Proceed with the test for small leaks (Steps 3-9).

3.Check the chiller carefully with an electronic leak detec- tor, halide torch, or soap bubble solution.

4.Leak Determination Ð If an electronic leak detector indicates a leak, use a soap bubble solution, if possible, to con®rm. Total all leak rates for the entire chiller. Leak- age at rates greater than 1 lb/year (0.45 kg/year) for the entire chiller must be repaired. Note total chiller leak rate on the start-up report.

5.If no leak is found during initial start-up procedures, com- plete the transfer of refrigerant gas from the storage tank to the chiller (see Pumpout and Refrigerant Transfer Pro- cedures, Transfer Refrigerant from Storage Tank to Chiller section, Step 1e, page 59). Retest.

6.If no leak is found after a retest:

a.Transfer the refrigerant to the storage tank and perform a standing vacuum test as outlined in the Standing Vacuum Test section, this page.

b.If the chiller fails this test, check for large leaks (Step 2b).

c.Dehydrate the chiller if it passes the standing vacuum test. Follow the procedure in the Chiller Dehydration section. Charge chiller with refrigerant (see Pumpout and Refrigerant Transfer Procedures, Transfer Refrig- erant from Storage Tank to Chiller section, Steps 1a-e or page 59).

7.If a leak is found, pump the refrigerant back into the stor- age tank, or if isolation valves are present, pump into the non-leaking vessel (see Pumpout and Refrigerant Trans- fer procedures section).

8. Transfer the refrigerant until chiller pressure is at

18 in. Hg (40 kPa absolute).

9.Repair the leak and repeat the procedure, beginning from Step 2h to ensure a leaktight repair. (If chiller is opened to the atmosphere for an extended period, evacuate it be- fore repeating leak test.)

Standing Vacuum Test Ð When performing the stand- ing vacuum test, or chiller dehydration, use a manometer or a wet bulb indicator. Dial gages cannot indicate the small amount of acceptable leakage during a short period of time.

1.Attach an absolute pressure manometer or wet bulb in- dicator to the chiller.

2.Evacuate the vessel (see Pumpout and Refrigerant Trans- fer Procedures section, page 59) to at least 18 in. Hg vac, ref 30-in. bar (41 kPa), using a vacuum pump or the pumpout unit.

3.Valve off the pump to hold the vacuum and record the manometer or indicator reading.

4.a. If the leakage rate is less than 0.05 in. Hg (.17 kPa) in 24 hours, the chiller is sufficiently tight.

b.If the leakage rate exceeds 0.05 in. Hg (.17 kPa) in 24 hours, repressurize the vessel and test for leaks. If refrigerant is available in the other vessel, pressurize by following Steps 2-10 of Return Refrigerant To Normal Operating Conditions section, page 61. If not, use nitrogen and a refrigerant tracer. Raise the vessel pressure in increments until the leak is detected. If refrigerant is used, the maximum gas pressure is approximately 120 psig (827 kPa) for HCFC-22, 70 psig (483 kPa) for HFC-134a at normal ambient temperature. If nitrogen is used, limit the leak test pres- sure to 230 psig (1585 kPa) maximum.

5.Repair leak, retest, and proceed with dehydration.

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Contents Safety Considerations Start-Up, Operation, and Maintenance InstructionsContents Contents Abbreviations and Explanations IntroductionRefrigeration Cycle Chiller FamiliarizationMOTOR/OIL Refrigeration Cooling Cycle 19XL Rear View Cooler Pressure Schrader Fitting Take-Apart Rabbet Fit ConnectorCooler In/Out Temperature Sensors Condenser In/Out Temperature SensorsRefrigerant Motor Cooling and Oil Cooling Cycles Lubrication CycleLubrication System Unit-Mounted Solid-State Starter Optional Starting EquipmentPIC Component Panel DenitionsControls Major PIC Components Panel LocationsPressure Transducer, Typical 19XL Controls and Sensor LocationsControl and OIL Heater Voltage Selector S1 Power Panel with OptionsGeneral LID Operation and Menus FigSelect 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 SetpointMenu Status Select Description Range Units Reference Point Name Alarm HistoryLID Screens Example 1 Ð STATUS01 Display ScreenMenu Example 2 Ð STATUS02 Display ScreenExample 3 Ð STATUS03 Display Screen Example 4 Ð Setpoint Display ScreenICE Build Termination Example 5 Ð Configuration Config Display ScreenExample 6 Ð LEAD/LAG Configuration Display Screen ECW Control OptionExample 7 Ð SERVICE1 Display Screen Menu Service Example 8 Ð SERVICE2 Display ScreenSpare Alert Enable Example 9 Ð SERVICE3 Display ScreenBearing Temperature Example 10 Ð Maintenance MAINT01 Display ScreenExample 11 Ð Maintenance MAINT02 Display Screen Discharge TemperatureExample 13 Ð Maintenance MAINT04 Display Screen Example 12 Ð Maintenance MAINT03 Display ScreenDescription RANGE/STATUS Units Reference Point Name PIC System Functions Page Protective Safety Limits and Control Settings Capacity Overrides Page Page Hot Gas Bypass Lead/Lag ControlECW HgbpPage Cent Capacity Ice Build ControlPage To LOG on Example of Attach to Network Device ScreenSequence Fig START-UP/SHUTDOWN/RECYCLERecycle Restart Delta T Equipment Required Using the Optional Storage Tank and PumpoutBefore Initial START-UP Job Data Required19XL Leak Test Procedures Page Ð HCFC-22 Pressure Ð Temperature C Ð HCFC-22 Pressure Ð Temperature FÐ HFC-134a Pressure Ð Temperature C Ð HFC-134a Pressure Ð Temperature FTemperature Pressure 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 MotorsTests to be Devices Tested Performed Charge Refrigerant into Chiller19XL Chiller Equalization Without PUMP- OUT Unit Control Test Menu FunctionsSize Refrigerant Charges19XL Total Refrigerant Charge CoolerDry Run to Test Start-Up Sequence Initial START-UPCheck Rotation Operator Duties Check Oil Pressure and Compressor StopCalibrate Motor Current Operating InstructionsTo Stop the Chiller Plant Tstat Pumpout and Refrigerant Transfer ProceduresOperating the Optional Pumpout Compressor Transfer Refrigerant from Storage Tank to ChillerTransfer the Refrigerant from Chiller to Storage Tank Chillers with Isolation ValvesTest After Service, Repair, or Major Leak Ð If General MaintenanceReturn Refrigerant to Normal Operating Conditions Guide Vane Actuator Linkage Weekly MaintenanceCheck Safety and Operating Controls Monthly Scheduled MaintenanceTo Change the OIL Inspect the Heat Exchanger Tubes Compressor Bearing and Gear MaintenOptional Pumpout System Controls Troubleshooting Guide MAINT04 MAINT01MAINT02 MAINT03Timing OUT or Timed OUT Shutdown with ON/OFF/RESET-OFFNormal or AUTO.-RESTART Recycle ShutdownAutorestart in Progress LOW Chilled Water Compressor Jumpstart and Refrigerant Protection Normal RUN with RESET, TEMPERATURE, or DemandOUT-OF-RANGE Sensor Failures Normal RUN Overrides Active AlertsLimited 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 Module Address Control ModulesInput Options Module Processor Module Psio Fig Starter Management Module SMM FigOptions Module Switch Options Setting Module InstallationTypical Benshaw, Inc. Solid-State Starter internal View Page Page SCR Benshaw, Inc. Solid-State Starter Troubleshooting GuideProblem Probable Causes Area of Correction RV1Condenser Heat Exchanger DataAdditional Data for Marine Waterboxes Cooler1034 kPa Waterbox Cover WeightsCoolers CondensersCompressor Weights Compressor/Motor WeightsOptional Pumpout System Electrical Data Compressor Fits and Clearances ``Z Compressor Assembly TorquesDescription Torque Ft-lbEXT CLRCOM CommPage CLR Page Chiller Power Panel, Starter Assembly Motor Wiring Schematic Chiller Power Panel, Starter Assembly Motor Wiring Schematic HPS PMRPOT GFRTypical 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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