Carrier 17EX specifications Chiller Alignment, Checking Preliminary Alignment

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Chiller Alignment

ALIGNMENT METHODS Ð There are several established procedures for aligning shafts. The dial indicator method is presented here since it is considered to be one of the most accurate and reliable. Another faster and easier method for alignment involves using laser alignment tools and comput- ers. Follow the laser tool manufacturer's guidelines when using the laser technique.

Where job conditions such as close-spaced shafts prohibit the use of dial indicators for coupling face readings, other instruments such as a taper gage may be used. The same pro- cedures described for the dial indicator may be used with the taper gage.

Shafts placed in perfect alignment in the non-operating (cold) condition will always move out of alignment to some extent as the chiller warms to operating temperature. In most cases, this shaft misalignment is acceptable for the initial run-in period before hot check and alignment can be made (see Hot Alignment Check section, page 61).

NOTE: The physical con®guration of the 17FX compressor makes the oil sump temperature a more signi®cant factor in alignment than the suction and discharge temperatures. There- fore, warm the sump oil to operating temperature (approxi- mately 140 F [60 C]), if possible, before beginning align- ment procedures.

General

1.Final shaft alignment must be within .002-in. (.05-mm) TIR (Total Indicated Runout) in parallel. Angular align- ment must be within 0.00033 inches per inch of traverse (0.00033 mm per mm of traverse) across the coupling face (or inch of indicator swing diameter) at operating tem- peratures. For example, if a bracket-mounted indicator moves through a 10-in. diameter circle when measuring angular misalignment, the allowable dial movement will be 10 times 0.00033 for a total of 0.0033 in. (0.0033 mm).

2.Follow the alignment sequence speci®ed in the Near Final Alignment section.

3.All alignment work is performed on gear and drive equip- ment. Once the compressor is bolted in a perfectly level position and is piped to the cooler and condenser, it must not be moved prior to hot check.

4.All alignment checks must be made with the equipment hold-down bolts tightened.

5.In setting dial indicators on zero and when taking read- ings, both shafts should be tight against their respective thrust bearings.

6.The space between coupling hub faces must be held to the dimensions in Fig. 29 and 30.

7.Accept only repeatable readings.

High Speed Coupling Alignment

1.Move the gear with the coupling attached into alignment with the compressor coupling. The compressor must be in the thrust position and the gear must be centered be- tween the thrust collars when determining gear position relative to the compressor. Adjust the jackscrews to reach close alignment. Follow the procedures outlined in the Correcting Angular Misalignment and Correcting Paral- lel Misalignment sections.

2.A 5-in. long spacer hub is supplied between the gear and compressor. Maintain the exact hub-to-hub distance speci- ®ed in Fig. 29.

3.Where the shaft ends are very close, a taper gage may be used in place of the dial indicator.

4.Get the gear alignment as close as possible by using the jackscrew adjustment.

Low Speed Coupling Alignment

1.Move the motor with the coupling attached into align- ment with the gear coupling. The motor must be in its mechanical center and the gear must be centered between the thrust collars when determining the motor position relative to the gear. Adjust the jackscrews to reach close alignment. Follow the procedure outlined in the Correct- ing Angular Misalignment and Correcting Parallel Mis- alignment sections.

2.Maintain the exact hub-to-hub distance as speci®ed in Fig. 30.

3.Where the shaft ends are very close, a taper gage may be used in place of the dial indicator.

4.Get the motor alignment as close as possible by using the jackscrew adjustment.

NOTE: The drive shaft end-¯oat at ®nal drive position must not allow the coupling hub faces to make contact or the cou- pling shroud to bind.

PRELIMINARY ALIGNMENT Ð To get within dial indi- cator range, roughly align the equipment as shown in Fig. 37 and as described below.

Place a straight edge across the OD of one coupling to the OD of the other. Measure the gap between the straight edge and the OD of the second coupling with a feeler gage. Then, by adding or removing shims at each corner, raise or lower the equipment by the measured amount.

In a similar manner, measure the shaft offset from side to side and jack the equipment over as required to correct.

Fig. 37 Ð Checking Preliminary Alignment

NEAR FINAL ALIGNMENT Ð Once the chiller compo- nents are within dial indicator range, the adjustments for mis- alignment should be made in a speci®c sequence. The four positions of alignment described below are arranged in the recommended order.

1.Angular in elevation Ð This alignment is adjusted with shims and is not readily lost in making the other adjustments.

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Contents Safety Considerations Start-Up, Operation, and Maintenance InstructionsContents Inspect Water Piping Piping Check Relief Devices Inspect WiringOCCPC01S Input Service Congurations Coupling Maintenance Motor MaintenanceContents 17EX Chiller Familiarization IntroductionAbbreviations Certified PerformanceTypical 17EX Chiller Components Lubrication Cycle OIL Cooling CycleRefrigeration, Cycle Starters17EX Compressor Lubrication Cycle Denitions ControlsProcessor Sensor Input/Output Module Control Center Temperature Sensors See Fig Pressure TransducersMajor PIC Components Panel Locations PIC Component Panel Location17EX Controls and Sensor Locations Psio LIDPIC Tewac Equip GND ÐGRD General LID Operation and Menus FigPROCESSOR/SENSOR INPUT/OUTPUT Module Psio LID Service Screen Override Operations YES or no , on or OFF , etc. to select the desired state17EX LID Menu Structure Default ScreenControl Test Service TableAlarm History Equipment ConfigurationLID CCNCarrier Comfort Network Hgbp Ð Hot Gas BypassHgbp SetpointChwr ChwsMenu Status Select Description Range Units Reference Point Name Alarm HistoryLID Display Data Example 1 Ð STATUS01 Display ScreenMenu Status Example 2 Ð STATUS02 Display ScreenExample 3 Ð STATUS03 Display Screen Menu Example 4 Ð STATUS04 Display ScreenExample 5 Ð Setpoint Display Screen ICE Build Termination Example 6 Ð Configuration Config Display ScreenECW Control Option LAG =2, Standby =3 Example 7 Ð LEAD/LAG Configuration Display ScreenExample 8 Ð SERVICE1 Display Screen Menu Service Example 9 Ð SERVICE2 Display ScreenSpare Alert Enable Example 10 Ð SERVICE3 Display ScreenBearing Temperature Example 11 Ð Maintenance MAINT01 Display ScreenExample 12 Ð Maintenance MAINT02 Display Screen Discharge TemperatureDescription RANGE/STATUS Units Reference Point Name Example 13 Ð Maintenance MAINT03 Display ScreenExample 14 Ð Maintenance MAINT04 Display Screen PIC System Functions Page Protective Safety Limits and Control Settings Capacity Overrides Page Page ECW Cent Capacity ICE Build Setpoint Example of Attach to Network Device Screen Example of Holiday Period Screen To Access the Service ScreensRecycle Sequence Fig START-UP/SHUTDOWNPage Motor Before Initial START-UPJob Data Required Equipment RequiredPage 17EX Leak Test Procedures Temperature C Ð HFC-134a Pressure Ð Temperature FÐ HFC-134a Pressure Ð Temperature C Temperature FDehydration Cold Trap 900 500 901 7000 1000 7001-14500 2500 Inspect WiringCheck Optional Pumpout Compressor Water Pip Recommended Motor Fastener Tightening Torques External Gear Pre-Start ChecksExternal Gear Lubrication System SOLID-STATE Starters Check StarterMechanical Starters Input the Local Occupied Schedule OCCPC01S Set Up Chiller Control CongurationInput the Design Set Points Ð To modify the set T1/P1 Full Load Points T2/P2 Change the LID Configuration if NecessarySurge Limiting or 50% Load Surge Prevention Occurs TOO Soon Occurs TOO LateIncrease P1 by Decrease P1 by Tests to be Devices Tested Performed Charge Refrigerant into ChillerInitial START-UP Control Test Menu FunctionsInitial Motor START-UP Dry Run to Test Start-Up SequenceCheck Motor Rotation Page Flange Nut Tightening Torques Low Speed Couplings Only General Recommendations Calibrate Motor Current Demand SettingCheck Oil Pressure and Compressor Stop To Prevent Accidental Start-Up Ð The PIC can beStopping the Chiller Operating InstructionsOperator Duties Starting the ChillerOperating the Optional Pumpout Compressor Pumpout and Refrigerant Transfer ProceduresPlant Chiller Serial No Chiller Model No Refrigerant Type Rear View Valve Condition RLAReturn Chiller to Normal Operating Conditions General MaintenanceChecking Guide Vane Linkage Ð Refer to Fig Contact Seal Maintenance Refer to ÐContact Seal Page Checking Preliminary Alignment Chiller AlignmentMeasuring Angular Misalignment Elevation Alignment Formula HOT Alignment Check Adjusting Angular Misalignment in PlanDoweling Correcting Parallel MisalignmentChanging the Oil Filters Weekly MaintenanceScheduled Maintenance Check Safety and Operating Controls MonthlyPumpout Compressor OIL17EX Chiller Oil Specications Typical Float Valve Arrangement Sleeve Bearings Page Motor Riggings Inspect the Heat Exchanger Tubes Controls for Optional Pumpout Compressor Troubleshooting GuidePage MAINT04 MAINT01MAINT02 MAINT03PIC 1CR AUXOilpd OiltAutorestart in Progress Starts Limit ExceededFailure to Stop FaultOperation Potential FREEZE-UPRunning Ð Demand Limited Running Ð Temp ControlChiller Protect Limit Faults Autorestart Pending Sensor Fault AlertLOW OIL Pressure AlertDESCRIPTION/MALFUNCTION Probable CAUSE/REMEDY Possible Cause Action External Gear Troubleshooting GuideProblem Possible Cause Ð Item NO.sTemperature Voltage Resistance Drop Ð Thermistor Temperature F vs Resistance/Voltage DropTemperature Voltage Resistance Drop Ð Thermistor Temperature C vs Resistance/Voltage DropInput Options Module Module SwitchControl Modules Module AddressGRD Processor/Sensor Input/Output Module Psio FigStarter Management Module SMM Fig Options Module Installation of NEW Psio ModuleSwitch Setting Options Module Four-In/Two-Out Module Fig4-In/2-Out Module Physical Data and Wiring Schematics100 Additional Cooler WeightsWeight Vessel SIZE² Condenser Total Weight Condenser Charge101 Additional Condenser WeightsCompressor Weight and Elbow Weight Drive Component Weights102 Ð Total Motor Weight, English lbÐ Total Motor Weight, SI kg 103 Marine Waterbox Cover WeightsNIH Waterbox Cover Weights Approximate Refrigerant HCFC-134a Charge104 Auxiliary Systems, Electrical DataRelief Valve Locations and Data 105 Compressor Fits and ClearancesMeasure 106Clearance Type Description 17FX Tabulation Ð Impeller Clearances Open-Drive Compressors107 108 Tewac 109Temp Press110 111 112 General 113Terminal Strip 114GND Ð Ground T1-T4Index Index Index Index Index Copyright 1997 Carrier Corporation

17EX specifications

The Carrier 17EX is recognized as an innovative air conditioning solution that combines efficiency with advanced technology. This model is designed to meet the increasing demands of residential and commercial cooling needs while maintaining environmental consciousness.

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