Trane RTCA 108-216, RTUB 207-224 manual For units with the discharge valve option

Page 26

Maintenance

Figure 15 - Oil filter change

1. Oil charging valve

2. Oil pressure control port

3. Oil pressure control port

Figure 16 - Oil filter pressure drop

Normal pressure drop

Maximum pressure drop

Oil filter pressure drop (bar)

Condensing Pressure - Suction Pressure (bar)

12.Charge the unit with refrigerant R134a refer to charging procedure).

For units with the discharge valve option:

1.Close the angle valve placed on the refrigerant liquid line to store the refrigerant in the condenser.

2.After the compressor stops, close the compressor discharge valve and disconnect the unit.

Note: Do not make successive vacuums by using the compressor. Irreversible compressor damage could occur.

3. Vacuum the remaining refrigerant

 

in the evaporator.

4.

Remove the seven bolts on the oil

 

filter cover. A pan may be

 

necessary to catch any oil that is

 

released after the cover is

 

loosened.

5.

Remove the cover and the oil filter

 

element.

6.

Install the new filter element.

7. Coat the new cover gasket with

 

refrigerant oil.

8.

Install the cover plate and cover

 

plate gasket.

9.

Install a new copper gasket under

 

the bolt head that had one at time

 

of removal. Replace all other bolts

 

and tighten to 89.5 Nm.

For units without discharge valve option

1.Shut off the compressor and disconnect all electrical service to the compressor.

2.Vacuum the refrigerant out of the circuit.

3.Remove the seven bolts on the oil filter cover. A pan may be necessary to catch any oil that is released after the cover is loosened.

4.Remove the cover and the oil filter element.

5.Install the new filter element.

6.Coat the new cover gasket with refrigerant oil.

7.Install the cover plate and cover plate gasket.

8.Install a new copper gasket under the bolt head that had one at time of removal. Replace all other bolts and tighten to 89.5 Nm.

9.Vacuum the refrigerant circuit at 500 micron and isolate the vacuum pump.

10.Confirm that no moisture or leaks are present by letting the vacuum stand for 2 hours.The pressure should not raise more than

250 microns.

11.Charge the unit with oil, in a quantity equal to what has been removed, by using the charging valve placed on the oil filter.

Note: the oil is very sensitive to moisture. Use the oil immediately after the oil can has been opened.

10. Vacuum the refrigerant circuit at

500 micron and isolate the

vacuum pump.

11. Confirm that no moisture or leaks

are present by letting the vacuum

stand for 2 hours.The pressure

should not raise more than

250 microns.

12. Charge the unit with oil, in a

quantity equal to what has been

removed, by using the charging

valve placed on the oil filter.

Note: the oil is very sensitive to moisture. Use the oil immediately after the oil can has been opened.

13.Open all the valves before restarting the chiller.

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RLC-SVX03A-E4

Image 26
Contents Installation Operation Maintenance Refrigerant Contents Operation Unit Inspection Inspection ChecklistGeneral information Loose Parts Inventory Description of the UnitGeneral data Rtub General data Rtca Storage InstallationInstallation responsibilities Foundation Special Lifting and Moving InstructionsIsolation Clearances Length Width HeightWater Connections Rtub DrainageReleasing the Nitrogen Holding Charge Water Treatment Flow Switch InstallationWater Pressure Gauges Extension of sensor power cable Refrigerant Safety ValvesInstalling and connecting temperature sensors Water Pressure-Relief ValvesElectrical connections performed by the installer Connecting the Rtub with a remote air-cooled condenserDetail of positions of refrigerant sensors 5R56-1 and 5R6-2 Units on the same level Rtca or other manufacturers condenser below the Rtub Size of the liquid line Pressure tests and leak detectionEquivalent pressure drops Discharge lineVacuum pumping Vacuum pump connectionPre-start checkout Installation ChecklistOperation Unit Voltage PhasingStart-up Procedures OverheatingSeasonal Unit Start-up Shutdown proceduresSubcooling System Restart After Extended ShutdownOperation Maintenance For units with the discharge valve option For units without discharge valve optionSome symptoms of an oil over- charged unit Some symptoms of a refrigerant under-charged unitSome symptoms of a refrigerant over-charged unit Checking the separator oil levelR134a Field-Charging Procedure Charge Isolation in the high or low side of the systemLubrication System Filter Replacement ProcedureOil Charging Procedure Measuring the oil levelField Oil-Charging Procedure Factory initial Oil-Charging ProcedureMaintenance Training Safety recommendationsMaintenance contract