Carrier 19XL specifications Chillers with Isolation Valves

Page 60

2. Transfer remaining refrigerant.

a. Close valve 5 and open valve 4.

VALVE

1a

1b

2

3

4

5

6

7

8

10

11

12

13

14

CONDITION

 

 

C

 

 

C

 

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

b. Turn off the chiller water pumps through the LID.

c. Turn off the pumpout condenser water, and turn on the pumpout compressor to push liquid out of the storage tank.

d. Close liquid line valve 7.

e. Turn off the pumpout compressor. f. Close valves 3 and 4.

g. Open valves 2 and 5.

VALVE

1a

1b

2

3

4

5

6

7

8

10

11

12

13

14

CONDITION

 

 

 

C

C

 

 

C

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

h. Turn on pumpout condenser water.

i. Run the pumpout compressor until the storage tank pressure reaches 5 psig (34 kPa) (18 in. Hg [40 kPa absolute] if repairing the tank).

j. Turn off the pumpout compressor. k. Close valves 1a, 1b, 2, 5, 6, and 10.

VALVE

1a

1b

2

3

4

5

6

7

8

10

11

12

13

14

CONDITION

C

C

C

C

C

C

C

C

C

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

l. Turn off pumpout condenser water.

TRANSFER THE REFRIGERANT FROM CHILLER TO STORAGE TANK

1. Equalize refrigerant pressure. a. Valve positions:

VALVE

1a

1b

2

3

4

5

6

7

8

10

11

12

13

14

CONDITION

 

 

C

 

C

C

 

C

C

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

b. Slowly open valve 5 and liquid line valves 7 and 10 to allow liquid refrigerant to drain by gravity into the pumpout storage tank.

VALVE

1a

1b

2

3

4

5

6

7

8

10

11

12

13

14

CONDITION

 

 

C

 

C

 

 

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2. Transfer the remaining liquid.

a. Turn off pumpout condenser water. Place valves in the following positions:

VALVE

1a

1b

2

3

4

5

6

7

8

10

11

2

13

14

CONDITION

 

 

 

C

C

 

 

 

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

b. Run the pumpout compressor for approximately30 min- utes; then, close valve 10.

VALVE

1a

1b

2

3

4

5

6

7

8

10

11

12

13

14

CONDITION

 

 

 

C

C

 

 

 

C

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

c. Turn off the pumpout compressor.

3. Remove any remaining refrigerant.

a. Turn on chiller water pumps using the Control Test Pumpdown.

b. Turn on pumpout condenser water.

c. Place valves in the following positions:

VALVE

1a

1b

2

3

4

5

6

7

8

10

11

12

13

14

CONDITION

 

 

C

 

 

C

 

 

C

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

d. Run the pumpout compressor until the chiller pres- sure reaches 65 psig (448 kPa) [30 psig (207 kPa)],

then shut off the pumpout compressor. Warm con- denser water will boil off any entrapped liquid refrig- erant and chiller pressure will rise.

e. When the pressure rises to 70 psig (483 kPa) [40 psig (276 kPa)], turn on the pumpout compressor until the pressure again reaches 65 psig (448 kPa) [30 psig (207 kPa)], and then turn off the compressor. Repeat this process until the pressure no longer rises, then turn on the pumpout compressor and pump out until the pressure reaches 18 in. Hg (40 kPa absolute).

f. Close valves 1a, 1b, 3, 4, 6, and 7.

VALVE

1a

1b

2

3

4

5

6

7

8

10

11

12

13

14

CONDITION

C

C

C

C

C

C

C

C

C

C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

g. Turn off the pumpout condenser water and continue with the Control Test for Pumpdown, which will lock out the chiller compressor for operation.

4. Establish vacuum for service.

a. In order to conserve refrigerant, operate the pump- out compressor until the chiller pressure is reduced to 18 in. Hg vac, ref 30 in. bar. (40 kPa abs.) following Step 3e.

Chillers with Isolation Valves

TRANSFER ALL REFRIGERANT TO CHILLER CON- DENSER VESSEL Ð For chillers with isolation valves, re- frigerant can be transferred from one chiller vessel to another without the need for an external storage tank and valve 7 stays closed. See Fig. 27, 28, and 35 for valve locations.

1. Push refrigerant into chiller condenser. a. Valve positions:

VALVE

1a

1b

2

3

4

5

8

11

12

13

14

CONDITION

 

 

 

C

C

 

C

 

C

C

C

 

 

 

 

 

 

 

 

 

 

 

 

b. Turn off chiller water pumps and pumpout unit con- denser water.

c. Turn on pumpout compressor to push liquid out of the cooler/compressor.

d. When all liquid has been pushed into the condenser, close cooler isolation valve 11.

e. Access the Control Test, Pumpdown table on the LID display to turn on the chiller water pumps.

f. Turn off the pumpout compressor.

2. Evacuate gas from cooler/compressor vessel.

a. Close pumpout valves 2 and 5, and open valves 3 and 4.

VALVE

1a

1b

2

3

4

5

8

11

12

13

14

CONDITION

 

 

C

 

 

C

C

C

C

C

C

 

 

 

 

 

 

 

 

 

 

 

 

b. Turn on pumpout condenser water.

c. Run pumpout until the compressor reaches 18 in. Hg vac (40 kPa abs.). Monitor pressures on the LID and on refrigerant gages.

d. Close valve 1a.

e. Turn off pumpout compressor. f. Close valves 1b, 3, and 4.

VALVE

1a

1b

2

3

4

5

8

11

12

13

14

CONDITION

C

C

C

C

C

C

C

C

C

C

C

 

 

 

 

 

 

 

 

 

 

 

 

g. Turn off pumpout condenser water.

h. Proceed to Pumpdown test on the LID to turn off chiller water pumps and lock out chiller compressor.

60

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Page 59 Page 61
Contents Start-Up, Operation, and Maintenance Instructions Safety ConsiderationsContents Contents Introduction Abbreviations and ExplanationsChiller Familiarization Refrigeration CycleMOTOR/OIL Refrigeration Cooling Cycle 19XL Rear View Take-Apart Rabbet Fit Connector Cooler In/Out Temperature SensorsCondenser In/Out Temperature Sensors Cooler Pressure Schrader FittingLubrication Cycle Refrigerant Motor Cooling and Oil Cooling CyclesLubrication System Starting Equipment Unit-Mounted Solid-State Starter OptionalDenitions ControlsMajor PIC Components Panel Locations PIC Component Panel19XL Controls and Sensor Locations Pressure Transducer, TypicalPower Panel with Options Control and OIL Heater Voltage Selector S1LID Operation and Menus Fig GeneralSelect − Example of Point Status Screen Status01 Override OperationsExample of Time Schedule Operation Screen 19XL Menu Structure 19XL Service Menu Structure 19XL Service Menu Structure Setpoint Example of Set Point ScreenDescription Range Units Reference Point Name Alarm History LID ScreensExample 1 Ð STATUS01 Display Screen Menu Status SelectExample 2 Ð STATUS02 Display Screen Example 3 Ð STATUS03 Display ScreenExample 4 Ð Setpoint Display Screen MenuExample 5 Ð Configuration Config Display Screen Example 6 Ð LEAD/LAG Configuration Display ScreenECW Control Option ICE Build TerminationExample 7 Ð SERVICE1 Display Screen Example 8 Ð SERVICE2 Display Screen Spare Alert EnableExample 9 Ð SERVICE3 Display Screen Menu ServiceExample 10 Ð Maintenance MAINT01 Display Screen Example 11 Ð Maintenance MAINT02 Display ScreenDischarge Temperature Bearing 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 Lead/Lag Control ECWHgbp Hot Gas BypassPage Ice Build Control Cent CapacityPage Example of Attach to Network Device Screen To LOG onSTART-UP/SHUTDOWN/RECYCLE Sequence FigRecycle Restart Delta T Using the Optional Storage Tank and Pumpout Before Initial START-UPJob Data Required Equipment Required19XL Leak Test Procedures Page Ð HCFC-22 Pressure Ð Temperature F Ð HCFC-22 Pressure Ð Temperature CÐ HFC-134a Pressure Ð Temperature F Ð HFC-134a Pressure Ð Temperature CTemperature Pressure Page Inspect Wiring Check Optional Pumpout Compressor Water PipCheck Starter MECHANICAL-TYPE StartersBenshaw, Inc. Solid-State Starter Power Stack BENSHAW, INC. SOLID-STATE StarterPower Up the Controls and Check the Oil Heater Set Up Chiller Control CongurationLoad Surge Prevention Occurs TOO Soon Occurs TOO Late Amps Correction Factors For 19XL Motors Volt Motor CodeCharge Refrigerant into Chiller 19XL Chiller Equalization Without PUMP- OUT UnitControl Test Menu Functions Tests to be Devices Tested PerformedRefrigerant Charges 19XL Total Refrigerant ChargeCooler SizeInitial START-UP Dry Run to Test Start-Up SequenceCheck Rotation Check Oil Pressure and Compressor Stop Calibrate Motor CurrentOperating Instructions Operator DutiesTo Stop the Chiller Plant Pumpout and Refrigerant Transfer Procedures Operating the Optional Pumpout CompressorTransfer Refrigerant from Storage Tank to Chiller TstatChillers with Isolation Valves Transfer the Refrigerant from Chiller to Storage TankGeneral Maintenance Test After Service, Repair, or Major Leak Ð IfReturn Refrigerant to Normal Operating Conditions Weekly Maintenance Guide Vane Actuator LinkageScheduled Maintenance Check Safety and Operating Controls MonthlyTo Change the OIL Compressor Bearing and Gear Mainten Inspect the Heat Exchanger TubesOptional Pumpout System Controls Troubleshooting Guide MAINT01 MAINT02MAINT03 MAINT04Shutdown with ON/OFF/RESET-OFF Timing OUT or Timed OUTRecycle Shutdown Normal or AUTO.-RESTARTAutorestart in Progress LOW Chilled Water Normal RUN with RESET, TEMPERATURE, or Demand Compressor Jumpstart and Refrigerant ProtectionNormal RUN Overrides Active Alerts OUT-OF-RANGE Sensor FailuresLimited Chiller Protect Limit Faults Protective LimitChiller Alerts Spare Sensor Alert MessagesOther PROBLEMS/MALFUNCTIONS DESCRIPTION/MALFUNCTION Probable CAUSE/REMEDYÐ Thermistor Temperature F vs Resistance/Voltage Drop Temperature Voltage Resistance DropÐ Thermistor Temperature C vs Resistance/Voltage Drop Control Modules Module AddressInput Options Module Starter Management Module SMM Fig Processor Module Psio FigOptions Module Installation Switch Options Setting ModuleTypical Benshaw, Inc. Solid-State Starter internal View Page Page Benshaw, Inc. Solid-State Starter Troubleshooting Guide Problem Probable Causes Area of CorrectionRV1 SCRHeat Exchanger Data Additional Data for Marine WaterboxesCooler CondenserWaterbox Cover Weights CoolersCondensers 1034 kPaCompressor/Motor Weights Compressor WeightsOptional Pumpout System Electrical Data Compressor Fits and Clearances Compressor Assembly Torques Description TorqueFt-lb ``ZCLR COMComm EXTPage CLR Page Chiller Power Panel, Starter Assembly Motor Wiring Schematic Chiller Power Panel, Starter Assembly Motor Wiring Schematic PMR POTGFR 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.

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