Carrier 17EX specifications

Page 84

temperature control overrides, hot gas bypass, surge al- gorithm status, and time schedule operation. Refer to Fig. 14 and Table 2, Examples 11-14.

·The control test feature checks for proper operation and tests the temperature sensors, pressure transducers, the guide vane actuator, oil pumps, water pumps, tower control, and other on/off outputs while the compressor is stopped. It also has the ability to lock off the compressor and turn on water pumps for pumpout operation. The LID display shows the required temperatures and pressures during these op- erations. Refer to Fig. 16 for the CONTROL TEST menu structure and to the Control Test section, page 85, for more information on this feature.

·Other SERVICE menu tables can access con®gured items, such as chilled water resets, override set points, etc.

·If an operating fault is detected, an alarm message is gen- erated and displayed on the LID default screen. A more detailed message, along with a diagnostic message, is also stored in the ALARM HISTORY table in the PIC.

Checking the Display Messages Ð The ®rst area to check when troubleshooting the 17EX is the LID display. If the alarm light is ¯ashing, check the primary and second- ary message lines on the LID default screen (Fig. 11). These messages indicate where the fault is occurring. The ALARM HISTORY table on the SERVICE menu also carries an alarm message to further expand on this alarm. For a complete list of alarm messages, see Table 12. If the alarm light starts to

¯ash while accessing a menu screen, depress the EXIT soft-

key to return to the default LID screen to read the failure message. The compressor does not run while an alarm con- dition exists unless the alarm type is an unauthorized start or a failure to shut down.

Checking Temperature Sensors Ð All tempera- ture sensors are thermistors. This means that the resistance of the sensor varies with temperature. All sensors have the same resistance characteristics. Determine sensor tempera- ture by measuring voltage drop if the controls are powered, or resistance if the controls are powered off. Compare the readings to the values listed in Table 14A or 14B.

RESISTANCE CHECK Ð Turn off the control power and disconnect the terminal plug of the sensor in question from the module. With a digital ohmmeter, measure the sensor re- sistance between the receptacles designated by the wiring diagram. The resistance and corresponding temperature are listed in Table 14A or 14B. Check the resistance of both wires to ground. This resistance should be in®nite.

VOLTAGE DROP Ð Using a digital voltmeter, the voltage drop across any energized sensor can be measured while the control is energized. Table 14A or 14B lists the relationship between temperature and sensor voltage drop (volts dc mea- sured across the energized sensor). Exercise care when mea- suring voltage to prevent damage to the sensor leads, con- nector plugs, and modules. The sensor wire should also be checked at the sensor plug connection. Check the sensor wire by removing the condenser at the sensor and measure for 5 vdc back to the module, if the control is powered.

Relieve all refrigerant pressure or drain the water prior to replacing the temperature sensors.

CHECK SENSOR ACCURACY Ð Place the sensor in a medium of a known temperature and compare that tempera- ture to the measured reading. The thermometer used to de- termine the temperature of the medium should be of labo- ratory quality with 0.5° F (.25° C) graduations. The sensor in question should be accurate to within 2° F (1.2° C).

See Fig. 6 for sensor locations. The sensors are immersed directly in the refrigerant or water circuits. The wiring at each sensor is easily disconnected by unlatching the connector. These connectors allow only one-way connection to the sen- sor. When installing a new sensor, apply a pipe sealant or thread sealant to the sensor threads.

DUAL TEMPERATURE SENSORS Ð There are 2 sensing elements on each of the bearing temperature sensors for ser- vicing convenience. In case one of the dual sensors is dam- aged, the other one can be used by moving a wire.

The number 1 terminal in the sensor terminal box is the common line. To use the second sensor, move the wire from the number 2 position to the number 3 position.

Checking Pressure Transducers Ð The 17EX chiller has 5 transducers. These transducers sense cooler pressure, condenser pressure, compressor oil supply pressure, oil sump, and gear oil supply pressure. The compressor oil supply pres- sure and the oil transmission sump pressure difference is cal- culated by a differential pressure power supply module. The PSIO then reads this differential. In effect, then, the PSIO reads 3 pressure inputs. The cooler and condenser transducers are used by the PIC to determine refrigerant temperatures.

All pressure inputs can be calibrated, if necessary. It is not usually necessary to calibrate at initial start-up. However, at high altitude locations, calibration of the transducer will be necessary to ensure the proper refrigerant temperature/ pressure relationship. Each transducer is supplied with 5 vdc power from a power supply. If the power supply fails, a trans- ducer voltage reference alarm occurs. If the transducer read- ing is suspected of being faulty, check the supply voltage. It should be 5 vdc ± .5 v. If the supply voltage is correct, the transducer should be re-calibrated or replaced.

To calibrate oil pressure differential, refer to Oil Pressure Differential Calibration at the end of this section.

Calibration can be checked by comparing the pressure read- ings from the transducer against an accurate refrigeration gage. These readings are all viewed or calibrated from the STATUS01 screen on the LID. The transducer can be checked and calibrated at 2 pressure points. These calibration points are 0 psig (0 kPa) and between 240 and 260 psig (1655 to

1793 kPa). To calibrate these transducers:

1.Shut down the compressor.

2.Disconnect the transducer in question from its Schrader ®tting.

NOTE: If the cooler or condenser vessels are at 0 psig (0 kPa) or are open to atmospheric pressure, the trans- ducers can be calibrated for zero without removing the transducer from the vessel.

3.Access the STATUS01 screen, and view the particular trans- ducer reading; it should read 0 psi (0 kPa). If the reading is not 0 psi (0 kPa), but within ± 5 psi (35 kPa), the

value may be zeroed by pressing the SELECT softkey while the parameter for the transducer is highlighted.

Then, press the ENTER softkey. The value will now go to zero.

If the transducer value is not within the calibration range, the transducer returns to the original reading. If the LID pressure value is within the allowed range (noted above), check the voltage ratio of the transducer. To obtain the voltage ratio, divide the voltage (dc) input from the trans- ducer by the supply voltage signal, measured at the PSIO terminals J7-J34 and J7-J35. For example, the condenser transducer voltage input is measured at PSIO terminals J7-1 and J7-2. The voltage ratio must be between 0.80 vdc and 0.11 vdc for the software to allow calibra- tion. Pressurize the transducer until the ratio is within range. Then attempt calibration again.

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Contents Start-Up, Operation, and Maintenance Instructions Safety ConsiderationsContents Piping Check Relief Devices Inspect Wiring OCCPC01S Input Service CongurationsCoupling Maintenance Motor Maintenance Inspect Water PipingContents Introduction Abbreviations17EX Chiller Familiarization Performance CertifiedTypical 17EX Chiller Components OIL Cooling Cycle Lubrication CycleStarters Refrigeration, Cycle17EX Compressor Lubrication Cycle Controls DenitionsTemperature Sensors See Fig Pressure Transducers Major PIC Components Panel LocationsPIC Component Panel Location Processor Sensor Input/Output Module Control Center17EX Controls and Sensor Locations LID PICPsio Equip GND Ð GRDTewac LID Operation and Menus Fig PROCESSOR/SENSOR INPUT/OUTPUT Module PsioGeneral LID Service Screen YES or no , on or OFF , etc. to select the desired state Override OperationsDefault Screen 17EX LID Menu StructureService Table Alarm HistoryEquipment Configuration Control TestCCN Carrier Comfort NetworkHgbp Ð Hot Gas Bypass LIDSetpoint ChwrChws HgbpDescription Range Units Reference Point Name Alarm History LID Display DataExample 1 Ð STATUS01 Display Screen Menu Status SelectExample 2 Ð STATUS02 Display Screen Example 3 Ð STATUS03 Display ScreenMenu Status Example 4 Ð STATUS04 Display Screen Example 5 Ð Setpoint Display ScreenMenu Example 6 Ð Configuration Config Display Screen ECW Control OptionICE Build Termination Example 7 Ð LEAD/LAG Configuration Display Screen LAG =2, Standby =3Example 8 Ð SERVICE1 Display Screen Example 9 Ð SERVICE2 Display Screen Spare Alert EnableExample 10 Ð SERVICE3 Display Screen Menu ServiceExample 11 Ð Maintenance MAINT01 Display Screen Example 12 Ð Maintenance MAINT02 Display ScreenDischarge Temperature Bearing TemperatureExample 13 Ð Maintenance MAINT03 Display Screen Example 14 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 ECW Cent Capacity ICE Build Setpoint Example of Attach to Network Device Screen To Access the Service Screens Example of Holiday Period ScreenSTART-UP/SHUTDOWN Recycle Sequence FigPage Before Initial START-UP Job Data RequiredEquipment Required MotorPage 17EX Leak Test Procedures Ð HFC-134a Pressure Ð Temperature F Ð HFC-134a Pressure Ð Temperature CTemperature F Temperature CDehydration Cold Trap Inspect Wiring Check Optional Pumpout Compressor Water Pip900 500 901 7000 1000 7001-14500 2500 External Gear Pre-Start Checks Recommended Motor Fastener Tightening TorquesExternal Gear Lubrication System Check Starter Mechanical StartersSOLID-STATE Starters Set Up Chiller Control Conguration Input the Design Set Points Ð To modify the setInput the Local Occupied Schedule OCCPC01S Change the LID Configuration if Necessary Surge Limiting orT1/P1 Full Load Points T2/P2 Load Surge Prevention Occurs TOO Soon Occurs TOO Late Increase P1 by Decrease P1 by50% Charge Refrigerant into Chiller Initial START-UPControl Test Menu Functions Tests to be Devices Tested PerformedDry Run to Test Start-Up Sequence Check Motor RotationInitial Motor START-UP Page Flange Nut Tightening Torques Low Speed Couplings Only Calibrate Motor Current Demand Setting Check Oil Pressure and Compressor StopTo Prevent Accidental Start-Up Ð The PIC can be General RecommendationsOperating Instructions Operator DutiesStarting the Chiller Stopping the ChillerPumpout and Refrigerant Transfer Procedures Operating the Optional Pumpout CompressorPlant Chiller Serial No Chiller Model No Refrigerant Type Rear View RLA Valve ConditionGeneral Maintenance Return Chiller to Normal Operating ConditionsContact Seal Maintenance Refer to Ð Checking Guide Vane Linkage Ð Refer to FigContact Seal Page Chiller Alignment Checking Preliminary AlignmentMeasuring Angular Misalignment Elevation Alignment Formula Adjusting Angular Misalignment in Plan HOT Alignment CheckCorrecting Parallel Misalignment DowelingWeekly Maintenance Scheduled MaintenanceCheck Safety and Operating Controls Monthly Changing the Oil FiltersCompressor OIL 17EX Chiller Oil SpecicationsPumpout Typical Float Valve Arrangement Sleeve Bearings Page Motor Riggings Inspect the Heat Exchanger Tubes Troubleshooting Guide Controls for Optional Pumpout CompressorPage MAINT01 MAINT02MAINT03 MAINT041CR AUX OilpdOilt PICStarts Limit Exceeded Autorestart in ProgressFault OperationPotential FREEZE-UP Failure to StopRunning Ð Temp Control Running Ð Demand LimitedChiller Protect Limit Faults Sensor Fault Alert LOW OIL PressureAlert Autorestart PendingDESCRIPTION/MALFUNCTION Probable CAUSE/REMEDY External Gear Troubleshooting Guide ProblemPossible Cause Ð Item NO.s Possible Cause ActionÐ Thermistor Temperature F vs Resistance/Voltage Drop Temperature Voltage Resistance DropÐ Thermistor Temperature C vs Resistance/Voltage Drop Temperature Voltage Resistance DropModule Switch Control ModulesModule Address Input Options ModuleProcessor/Sensor Input/Output Module Psio Fig Starter Management Module SMM FigGRD Installation of NEW Psio Module Switch Setting Options ModuleFour-In/Two-Out Module Fig Options ModulePhysical Data and Wiring Schematics 4-In/2-Out ModuleAdditional Cooler Weights Weight Vessel SIZE²Condenser Total Weight Condenser Charge 100Additional Condenser Weights Compressor Weight and Elbow WeightDrive Component Weights 101Ð Total Motor Weight, English lb Ð Total Motor Weight, SI kg102 Marine Waterbox Cover Weights NIH Waterbox Cover WeightsApproximate Refrigerant HCFC-134a Charge 103Auxiliary Systems, Electrical Data Relief Valve Locations and Data104 Compressor Fits and Clearances 105106 Clearance Type DescriptionMeasure Tabulation Ð Impeller Clearances Open-Drive Compressors 10717FX 108 109 TempPress Tewac110 111 112 113 General114 GND Ð GroundT1-T4 Terminal StripIndex 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.

One of the standout features of the Carrier 17EX is its impressive Seasonal Energy Efficiency Ratio (SEER) rating. With a SEER rating that often exceeds 17, this unit ensures optimized energy consumption, significantly lowering operational costs for users. The incorporation of advanced compressor technology allows the system to adjust its cooling output based on the specific needs of the environment, thus providing both comfort and energy savings.

The Carrier 17EX utilizes a variable-speed inverter-driven compressor that enhances its performance and adaptability. This technology allows the air conditioning unit to operate at different speeds, intelligently adjusting to changing load conditions. As a result, the system runs more efficiently and quietly, providing a more consistent comfort level without the abrupt temperature swings associated with traditional units.

In addition to efficiency, the Carrier 17EX also prioritizes reliability and durability. The unit comes with a robust cabinet that protects the components from weather elements, ensuring longevity and consistent performance. The innovative design integrates a corrosion-resistant finish and robust insulation, which further enhances the unit's resilience in various environmental conditions.

For users concerned about indoor air quality, the Carrier 17EX includes advanced filtration systems designed to capture allergens and airborne particles. This feature is particularly beneficial for individuals with respiratory issues, ensuring that the air circulated within the space is clean and healthy.

Moreover, the Carrier 17EX is equipped with smart technology capabilities, allowing users to control their systems remotely through smartphones or other smart devices. This connectivity not only provides convenience but also empowers homeowners to optimize their energy use by adjusting settings on the fly, ensuring efficient operation even when they are away from home.

Overall, the Carrier 17EX stands out in the marketplace for its exceptional energy efficiency, advanced technology, and commitment to providing reliable and effective cooling solutions. Its combination of modern features makes it a preferred choice for those looking to enhance comfort while being mindful of energy consumption and environmental impact.
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