Carrier 19XL specifications Scheduled Maintenance, Check Safety and Operating Controls Monthly

Page 63

SCHEDULED MAINTENANCE

Establish a regular maintenance schedule based on the actual chiller requirements such as chiller load, run hours, and water quality. The time intervals listed in this section are offered as guides to service only.

Service Ontime Ð The LID will display a SERVICE ONTIME value on the Status01 table. This value should be reset to zero by the service person or the operator each time major service work is completed so that time between serv- ice can be viewed.

Inspect the Control Center Ð Maintenance is lim- ited to general cleaning and tightening of connections. Vacuum the cabinet to eliminate dust build-up. In the event of chiller control malfunctions, refer to the Troubleshooting Guide sec- tion for control checks and adjustments.

Be sure power to the control center is off when cleaning and tightening connections inside the control center.

Check Safety and Operating Controls Monthly

ÐTo ensure chiller protection, the Control Test Automated Test should be done at least once per month. See Table 3 for safety control settings. See Table 7 for Control Test functions.

Changing Oil Filter Ð Change the oil ®lter on a yearly basis or when the chiller is opened for repairs. The 19XL has an isolatable oil ®lter so that the ®lter may be changed with the refrigerant remaining in the chiller. Use the follow- ing procedure:

1.Make sure that the compressor is off, and the disconnect for the compressor is open.

2.Disconnect the power to the oil pump.

3.Close the oil ®lter isolation valves (Fig. 4).

4.Connect an oil charging hose from the oil charging valve (Fig. 4), and place the other end in a clean container suitable for used oil. The oil drained from the ®lter hous- ing should be used as an oil sample to be sent to a labo- ratory for proper analysis. Do not contaminate this sample.

5.Slowly open the charging valve to drain the oil from the housing.

The oil ®lter housing is at a high pressure. Relieve this pressure slowly.

6.Once all oil has been drained, place some rags or ab- sorbent material under the oil ®lter housing to catch any drips once the ®lter is opened. Remove the 4 bolts from the end of the ®lter housing and remove the ®lter cover.

7.Remove the ®lter retainer by unscrewing the retainer nut. The ®lter may now be removed and disposed of properly.

8.Replace the old ®lter with a new ®lter. Install the ®lter retainer and tighten down the retainer nut. Install the ®l- ter cover and tighten the 4 bolts.

9.Evacuate the ®lter housing by placing a vacuum pump on the charging valve. Follow the normal evacuation pro- cedures. Shut the charging valve when done, and recon- nect the valve so that new oil can be pumped into the ®lter housing. Fill with the same amount that was removed, then close the charging valve.

10.Remove the hose from the charging valve, open the iso- lation valves to the ®lter housing, and turn on the power to the pump and the motor.

Oil Speci®cation Ð The 19XL compressor holds ap- proximately 11.7 gal. (44.3 L) of oil. If oil is added, it must meet the following Carrier speci®cations:

·Oil type for HCFC-22 Chillers only . . . . . . . . . . . Alkyl- benzene-based synthetic compressor oil speci®cally formatted for use in HCFC-22 gear-driven machines

ISO Viscosity Grade . . . . . . . . . . . . . . . . . . . . . . . . . . 86

·Oil Type for units using R-134a . . . . . . . . . . . . Inhibited polyolester-based synthetic compressor oil formatted for use with HFC, gear- driven, hermetic compressors.

ISO Viscosity Grade . . . . . . . . . . . . . . . . . . . . . . . . . . 68

The alkyl-benzene type oil (part number PP23BZ101) or the polyolester-based oil (part number PP23BZ103) may be ordered from your local Carrier representative.

Oil Changes Ð Carrier recommends changing the oil after the ®rst year of operation and every 3 years thereafter as a minimum in addition to a yearly oil analysis. However, if a continuous oil monitoring system is functioning and a yearly oil analysis is performed, time between oil changes can be extended.

TO CHANGE THE OIL

1.Transfer the refrigerant into the condenser (for isolatable vessels) or a storage tank.

2.Mark the existing oil level.

3.Open the control and oil heater circuit breaker.

4.When the chiller pressure is 5 psi (34 kPa) or less, drain the oil reservoir by opening the oil charging valve (Fig. 2A or Fig. 2B). Slowly open the valve against refrigerant pressure.

5.Change the oil ®lter at this time. See Changing Oil Filter section.

6.Change the refrigerant ®lter at this time; see the next sec- tion, Refrigerant Filter.

7.Charge the chiller with oil. Charge until the oil level is equal to the oil level marked in Step 2. Turn on the power to the oil heater and let the PIC warm it up to at least 140 F (60 C). Operate the oil pump manually, through the Control Test, for 2 minutes. The oil level should be full in the lower sight glass for shutdown conditions. If the oil level is above 1¤2 full in the upper sight glass, remove the excess oil. The oil level should now be equal to the amount shown in Step 2.

Refrigerant Filter Ð A refrigerant ®lter drier, located on the refrigerant cooling line to the motor (Fig. 2A or 2B), should be changed once a year, or more often if ®lter condition indicates a need for more frequent replacement. Change the ®lter with the chiller pressure at 0 psig (0 kPa) by transferring the refrigerant to the condenser vessel, (if iso- lation valves are present), or a storage tank. A moisture indicator sight glass is located beyond this ®lter to indicate the volume and moisture in the refrigerant. If the moisture indicator (dry-eye) indicates moisture, locate the source of water immediately by performing a thorough leak check.

Oil Reclaim Filters Ð The oil reclaim system has a strainer on the eductor suction line and a ®lter on the cooler scavaging line. Replace these ®lters once per year, or more often if ®lter condition indicates a need for more frequent replacement. Change these ®lters by transferring the refrig- erant charge to a storage vessel or the condenser.

63

Page 62 Page 64
Image 63
Page 62 Page 64
Contents Safety Considerations Start-Up, Operation, and Maintenance InstructionsContents Contents Abbreviations and Explanations IntroductionChiller Familiarization Refrigeration CycleMOTOR/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 OptionsLID Operation and Menus Fig GeneralSelect 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 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 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 F Ð HFC-134a Pressure Ð Temperature CTemperature 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 CoolerInitial START-UP Dry Run to Test Start-Up SequenceCheck 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 ValvesGeneral Maintenance Test After Service, Repair, or Major Leak Ð IfReturn Refrigerant to Normal Operating Conditions Guide Vane Actuator Linkage Weekly MaintenanceScheduled Maintenance Check Safety and Operating Controls MonthlyTo 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-OFFRecycle Shutdown Normal or AUTO.-RESTARTAutorestart in Progress LOW Chilled Water Compressor Jumpstart and Refrigerant Protection Normal RUN with RESET, TEMPERATURE, or DemandNormal RUN Overrides Active Alerts OUT-OF-RANGE Sensor FailuresLimited 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 Control Modules Module AddressInput Options Module Starter Management Module SMM Fig Processor Module Psio 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/Motor Weights Compressor 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.
Top Page Image Contents