Carrier 19XL specifications Pumpout and Refrigerant Transfer Procedures, Tstat

Page 59

PUMPOUT AND REFRIGERANT TRANSFER

PROCEDURES

Preparation Ð The 19XL may come equipped with an optional storage tank or pumpout system, or a pump- out compressor. The refrigerant can be pumped for service work to either the cooler/compressor vessel or the condenser vessel by using the optional pumpout system. If a storage tank is supplied, the refrigerant can be isolated in the external storage tank. The following procedures describe how to transfer refrigerant from vessel to vessel and perform chiller evacuations.

Operating the Optional Pumpout Compressor

1.Be sure that the suction and the discharge service valves on the optional pumpout compressor are open (back- seated) during operation. Rotate the valve stem fully coun- terclockwise to open. Frontseating the valve closes the refrigerant line and opens the gage port to compressor pressure.

2.Make sure that the compressor holddown bolts have been loosened to allow free spring travel.

3.Open the refrigerant inlet valve on the pumpout compressor.

4.Oil should be visible in the pumpout compressor sight glass under all operating conditions and during shut- down. If oil is low, add oil as described under Optional Pumpout System Maintenance section, page 65. The pumpout unit control wiring schematic is detailed in Fig. 34.

TO READ REFRIGERANT PRESSURES during pumpout or leak testing:

1.The LID display on the chiller control center is suitable for determining refrigerant-side pressures and low (soft) vacuum. For evacuation or dehydration measurement, use a quality vacuum indicator or manometer to ensure the desired range and accuracy. This can be placed on the Schrader connections on each vessel by removing the pres- sure transducer.

2.To determine storage tank pressure, a 30 in.-0-400 psi (-101-0-2760 kPa) gage is attached to the vessel.

3.Refer to Fig. 27, 28, and 35 for valve locations and numbers.

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.

Chillers with Pumpout Storage Tanks Ð If the chiller has isolation valves, leave them open for the follow- ing procedures. The letter ``C'' describes a closed valve. See Fig. 16, 17, 27, and 28.

TRANSFER REFRIGERANT FROM STORAGE TANK TO CHILLER

1.Equalize refrigerant pressure.

a.Use the Control Test Terminate Lockout to turn on water pumps and monitor pressures.

b.Close pumpout unit/storage tank valves 2, 4, 5, 8, and 10 and close chiller charging valve 7; open chiller iso- lation valves 11, 12, 13, and 14 (if present).

c.Open pumpout unit/storage tank valves 3 and 6, open chiller valves 1a and 1b.

LEGEND

CÐ Contactor

FU

Ð Fuse, 3 Amps

HP

Ð High-Pressure Cutout

OL

Ð Compressor Overload

T'STAT

Ð Internal Thermostat

 

Compressor Terminal

 

Contactor Terminal

 

Overload Terminal

 

Pumpout Unit Terminal

*Bimetal thermal protector imbedded in motor winding.

Fig. 34 Ð 19XL Pumpout Unit

Wiring Schematic

OIL RETURN

VENT VALVE 8

LINE

 

CONNECTION

 

 

 

 

 

 

 

 

 

 

 

 

 

PUMPOUT

 

 

 

 

 

 

 

 

 

 

 

 

STARTER

 

 

 

 

 

 

 

 

 

 

 

 

PANEL

 

CONDENSER

 

 

 

REFRIGERANT

 

 

 

 

 

WATER

 

 

 

 

 

 

 

 

 

 

 

INLET VALVE

 

 

 

 

 

 

CONNECTIONS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Fig. 35 Ð Optional Pumpout Unit

 

 

 

VALVE

1a

1b

2

3

4

5

6

7

8

10

11

12

13

14

CONDITION

 

 

C

 

C C

 

C C

C

 

 

 

 

d.Gradually crack open valve 5 to increase chiller pres- sure to 68 psig (469 kPa), [35 psig (141 kPa)]. Slowly feed refrigerant to prevent freeze up.

e.Open valve 5 fully after the pressure rises above the freeze point of the refrigerant. Open liquid line valves 7 and 10 until refrigerant pressure equalizes.

VALVE

1a

1b

2

3

4

5

6

7

8

10

11

12

13

14

CONDITION

 

 

C

 

C

 

 

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

59

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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 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 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 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 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 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 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 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 CoolerCheck Rotation Initial START-UPDry Run to Test Start-Up Sequence 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 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 MAINT04 MAINT01MAINT02 MAINT03Timing 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 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 CondensersOptional Pumpout System Electrical Data Compressor/Motor WeightsCompressor Weights 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.

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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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