Emerson Figure i manual Compressor Replacement

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Maintenance

4.3Compressor Replacement

Replacement compressors are available from Emerson. They will be shipped in a permanent crate to the job site as required by the service contractor.

Upon shipping a replacement compressor, the service contractor will be billed in full for the compres- sor. Credit for warranty replacement compressors will not be issued until the replacement has been returned to the factory. The compressor should be returned in the same container used for shipping to the job. The possible damage causes or conditions that were found must be recorded by marking the compressor return tag.

! CAUTION

Do not loosen any refrigeration or electrical connections before relieving pressure.

NOTE

Release of refrigerant to the atmosphere is harmful to the environment. Refrigerant must be recycled or discarded in accordance with federal, state, and local regulations.

1.Disconnect power.

2.Attach suction and discharge gauges to access fittings.

3.Recover refrigerant using approved recovery procedures and equipment. Use a filter drier when charging the system with recovered refrigerant.

4.Unsweat refrigerant connections and disconnect electrical connections.

5.Remove failed compressor.

6.Install replacement compressor and make all connections.

7.Pressurize and leak test the system.

8.Follow manufacturer’s instructions for cleanout kits.

9.Evacuate the system twice to a minimum 250 microns, breaking the vacuum with dry nitrogen each time. The third time, evacuate to 250 microns and verify the above levels are maintained for at least one minute after the unit is isolated by a shutoff valve from the vacuum pump.

10.With the system in a 250 micron or lower vacuum, charge the system with liquid refrigerant based on requirements of the evaporator, condensing unit and lines. Refer to 2.5.6 - General System Charge Requirements or unit nameplate for system charge requirements.

11.Apply power and operate system. Check for proper operation. Refer to design pressures in Table 13.

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Contents Liebert Prop Fan Condensing Unit = 380/415-3ph-50Hz Example PFH037A-PL7Table of Contents Figures Optional Equipment Prop Fan Condensing UnitsLocation Considerations Equipment InspectionNet Weight Dimensional DataModel Numbers Dimensional Data, in. mm Lb. kg 60Hz 50Hz Cabinet and floor planning data, horizontal air dischargeFootprint Dimensions Wall Mounting Electrical and piping connections, horizontal air discharge Piping and Electrical ConnectionsPFH096A- L 152General piping arrangement Top Air Discharge Models Electrical field connections, 1- to 5-ton unitsElectrical field connections, 8-ton units Single-phase, 1-3 ton model schematic, typical Three-phase, 3-5 ton model schematic, typical Three-phase, 8 ton model schematic, typical Piping for Elevation Differences between PFH and Evaporator Piping ConsiderationsEvaporator Condensing UnitEquivalent lengths for various pipe fittings, ft m Field-Fabricated Line Sets Pre-Charged Line SetsRefrigerant charge in Liebert pre-charged R-407C line sets Line Size Length Charge R-407C Ft. m Lb-oz kgRecommended line sizes, OD Cu Liebert PFH unit charge levels and coupling sizePiping connection sizes and torque Installation of Piping to UnitsLine charges refrigerant per 100 ft m of Type L copper tube Line Size OD Cu Coupling Size Torque, lb-ft. N-mFilter Drier Selection and Installation Install the New Condensing UnitRemove Existing Condensing Unit General System Charge Requirements Evaporator Charge LevelsEvaporator Charge R-407C Indoor Unit Models Oz kg Low-Voltage Control Wire Connections Low-Voltage Control Wire SizingElectrical Connections Nominal Input Voltage-Phase Capacity Electrical Nominal Input Voltage- Phase Capacity ElectricalElectrical Data Electrical data-High ambient models 105F/41C 60HzElectrical data-High ambient models 105F/41C 50Hz Electrical data-Quiet-Line models 95F/35C 60HzElectrical data Quiet-Line models 95F/35C 50Hz Checklist for Completed InstallationCompressor High Head PressureLiebert Lee-Temp Flood Back Head Pressure Control Adjustment Hot Gas BypassOperation Hot gas bypass diagram Compressor Failure GeneralElectrical Failure-Burnout Mechanical FailureCompressor Replacement Field Charge Verification Field verification chargeModel Numbers 407C 60 Hz 50 Hz Oz kg Problem Cause Remedy TroubleshootingWeb Site Monitoring Single-Phase&Three-Phase UPS Environmental SystemsUni Etwo