Carrier Charge Refrigerant into Chiller, 19XL Chiller Equalization Without PUMP- OUT Unit

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Loosen the compressor holddown bolts to allow free spring travel. Open the compressor suction and discharge service valves. Check that oil is visible in the compressor sight glass. Add oil if necessary.

See Pumpout and Refrigerant Transfer Procedures and Optional Pumpout System Maintenance sections, pages 59 and 65, for details on transfer of refrigerant, oil speci®ca- tions, etc.

High Altitude Locations Ð Recalibration of the pres- sure transducers will be necessary as the chiller was initially calibrated at sea level. Please see the calibration procedure in the Troubleshooting Guide section.

Charge Refrigerant into Chiller

The transfer, addition, or removal of refrigerant in spring isolated chillers may place severe stress on external pip- ing if springs have not been blocked in both up and down directions.

The standard 19XL chiller will have the refrigerant already charged in the vessels. The 19XL may be ordered with a nitrogen holding charge of 15 psig (103 kPa). Evacu- ate the entire chiller, and charge chiller from refrigerant cylinders.

19XL CHILLER EQUALIZATION WITHOUT PUMP- OUT UNIT

When equalizing refrigerant pressure on the 19XL chiller after service work or during the initial chiller start-up, do not use the discharge isolation valve to equalize. The motor cooling isolation valve or charging hose (con- nected between pumpout valves on top of cooler and condenser) is to be used as the equalization valve.

To equalize the pressure differential on a refrigerant isolated 19XL chiller, use the TERMINATE LOCKOUT function of the Control Test in the SERVICE menu. This will help to turn on pumps and advise the proper procedure. The following procedure describes how to equalize refrig- erant pressure on an isolated 19XL chiller without a pump- out unit:

1.Access TERMINATE LOCKOUT function on the Con- trol Test.

2.Turn on the chilled water and condenser water pumps to ensure against freezing.

3.Slowly open the refrigerant cooling isolation valve. The chiller cooler and condenser pressures will grad- ually equalize. This process will take approximately 15 minutes.

4.Once the pressures have equalized, the cooler isolation valve, the condenser isolation valve, and the hot gas by- pass isolation valve may now be opened. Refer to Fig. 27 and 28, valves 11, 12, and 14.

Whenever turning the discharge isolation valve, be sure to reattach the valve locking device. This will prevent the valve from opening or closing during serv- ice work or during chiller operation.

Table 7 Ð Control Test Menu Functions

TESTS TO BE

DEVICES TESTED

PERFORMED

 

1.Automated Tests* Operates the second through seventh tests

2. PSIO Thermistors

Entering chilled water

 

Leaving chilled water

 

Entering condenser water

 

Leaving condenser water

 

Discharge temperature

 

Bearing temperature

 

Motor winding temperature

 

Oil sump temperature

3.Options Thermistors Common chilled water supply

sensor

Common chilled water return sensor Remote reset sensor Temperature sensor Ð Spare 1

Spare 2

Spare 3

Spare 4

Spare 5

Spare 6

Spare 7

Spare 8

Spare 9

4. Transducers

Evaporator pressure

 

Condenser pressure

 

Oil pressure differential

 

Oil pump pressure

5.Guide Vane Actuator Open Close

6. Pumps

All pumps or individual pumps may

 

be activated:

 

Oil pump Ð Con®rm pressure

 

Chilled water pump Ð Con®rm ¯ow

 

Condenser water pump Ð Con®rm

 

¯ow

7.Discrete Outputs All outputs or individual outputs may be energized:

Hot gas bypass relay Oil heater relay Motor cooling relay Tower fan relay Alarm relay

Shunt trip relay

8.Pumpdown/Lockout When using pumpdown/lockout, observe freeze up precautions when removing charge:

Instructs operator as to which valves to close and when

Starts chilled water and condenser water pumps and con®rms ¯ows

Monitors Ð Evaporator pressure Condenser pressure Evaporator temperature during pumpout procedures

Turns pumps off after pumpdown Locks out compressor

9.Terminate Lockout Starts pumps and monitors ¯ows

Instructs operator as to which values to open and when

Monitors Ð Evaporator pressure Condenser pressure Evaporator temperature during charging process

Terminates compressor lockout

10.Refrigerant Type Sets refrigerant type used: HCFC-22 or HFC-134a.

NOTE: Be sure to ATTACH TO LOCAL DEVICE after changing refrigerant type.

See Attach to Network Device Control section, page 37.

*During any of the tests that are not automated, an out-of-range read- ing will have an asterisk (*) next to the reading and a message will be displayed.

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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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