Carrier 17EX specifications PIC System Functions

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PIC System Functions

NOTE: In the rest of this manual, words not part of para- graph headings and printed in all capital letters can be viewed on the LID (e.g., LOCAL, CCN, RUNNING, ALARM, etc.). Words printed both in capital letters and italics can also be viewed on the LID and are parameters (CONTROL MODE, COOLING SETPOINT, OVERRIDE THRESHOLD, etc.) with associated values (e.g., modes, temperatures, pressures, per- centages, on, off, etc.). Words printed in all capital letters and in a box represent softkeys on the LID control panel

(e.g., ENTER and EXIT ). See Table 2 for examples of the information that can appear on the LID screens. Figures 11-17 give an overview of LID operation and menus.

CAPACITY CONTROL Ð The PIC controls the chiller ca- pacity by modulating the inlet guide vanes in response to chilled water temperature changes away from the WATER/ BRINE CONTROL POINT. The WATER/BRINE CONTROL POINT may be changed by a CCN network device or is de- termined when the PIC adds any active chilled water reset to the chilled water SET POINT. The PIC uses the PROPOR- TIONAL INC (Increase) BAND, PROPORTIONAL DEC (Decrease) BAND, and the PROPORTIONAL ECW (Enter- ing Chilled Water) GAIN to determine how quickly or slowly to respond. WATER/BRINE CONTROL POINT may be viewed/ overridden from the STATUS menu, STATUS01 screen.

ENTERING CHILLED WATER CONTROL Ð If this op- tion is enabled, the PIC uses the ENTERING CHILLED WA- TER temperature to modulate the vanes instead of the LEAVING CHILLED WATER temperature. The ENTERING CHILLED WATER control option may be viewed/modi®ed from the CONFIG screen, accessed from the EQUIPMENT CON- FIGURATION table.

DEADBAND Ð This is the tolerance on the chilled water/ brine temperature WATER/BRINE CONTROL POINT. If the water temperature goes outside the WATER/BRINE DEAD- BAND, the PIC opens or closes the guide vanes in response until it is within tolerance. The PIC may be con®gured with a 0.5° to 2° F (0.3° to 1.1° C) deadband. WATER/BRINE DEADBAND may be viewed or modi®ed from the SERVICE1 screen, accessed from the EQUIPMENT SERVICE table.

For example, a 1° F (0.6° C) deadband setting controls the water temperature within ±0.5° F (0.3° C) of the control point. This may cause frequent guide vane movement if the chilled water load ¯uctuates frequently. A value of 1° F (0.6° C) is the default setting.

PROPORTIONAL BANDS AND GAIN Ð Proportional band is the rate at which the guide vane position is corrected in proportion to how far the chilled water/brine temperature is from the control point. Proportional gain determines how quickly the guide vanes react to how quickly the tempera- ture is moving from WATER/BRINE CONTROL POINT. Pro- portional bands and gain values can be viewed/modi®ed from the SERVICE3 screen (accessed from the EQUIPMENT CON- FIGURATION table) and the MAINT01 screen (accessed from the CONTROL ALGORITHM STATUS table).

The Proportional Band Ð There are two response modes, one for temperature response above the control point, the other for response below the control point.

The ®rst type is called PROPORTIONAL INC BAND, and it can slow or quicken vane response to chilled water/brine temperature above the WATER/BRINE DEADBAND. It can be adjusted from a setting of 2 to 10; the default setting is

6.5.PROPORTIONAL DEC BAND can slow or quicken vane response to chilled water temperature below deadband plus the control point. It can be adjusted on the LID from a set- ting of 2 to 10, and the default setting is 6.0. Increasing ei- ther of these settings causes the vanes to respond more slowly than at a lower setting.

The PROPORTIONAL ECW GAIN can be adjusted at the LID display from a setting of 1.0 to 3.0, with a default setting of

2.0.Increase this setting to increase guide vane response to a change in entering chilled water temperature.

DEMAND LIMITING Ð The PIC responds to the ACTIVE DEMAND LIMIT set point by limiting the opening of the guide vanes. It compares the set point to either COMPRES- SOR MOTOR LOAD or COMPRESSOR MOTOR LOAD CUR- RENT (percentage), depending on how the control is con- ®gured for the DEMAND LIMIT SOURCE which is accessed on the SERVICE1 screen. The default setting is current limiting. The ACTIVE DEMAND LIMIT may be viewed on the STATUS01 screen.

CHILLER TIMERS Ð The PIC maintains 2 runtime clocks, known as COMPRESSOR ONTIME and SERVICE ONTIME. COMPRESSOR ONTIME indicates the total life- time compressor run hours. This timer can register up to 500,000 hours before the clock turns back to zero. The SERV- ICE ONTIME is a resettable timer that can be used to indi- cate the hours since the last service visit or any other event. The time can be changed from the LID to whatever value is desired. This timer can register up to 32,767 hours before it rolls over to zero.

The chiller also maintains a start-to-start timer and a stop- to-start timer. These timers limit how soon the chiller can be started. See the Start-Up/Shutdown/Recycle Sequence sec- tion, page 43, for operational information.

OCCUPANCY SCHEDULE Ð The chiller schedule, de- scribed in the Time Schedule Operation section, page 18, determines when the chiller can run. Each schedule consists of 1 to 8 occupied/unoccupied time periods, set by the op- erator. These time periods can be enabled (or not enabled) on each day of the week and for holidays. The day begins with 0000 hours and ends with 2400 hours. The chiller is in an occupied state unless an unoccupied time period is in effect.

NOTE: To determine whether or not the chiller is in an oc- cupied state and can be started, access the STATUS01 screen and scroll to the OCCUPIED? parameter. If the value in the right column is YES, the chiller is in an occupied state and can turn on or can be started. If the value is NO, the chiller is in an unoccupied state; that is, it can shut down or cannot be started without performing an override.

The schedules can be set to follow the building schedule or to be in an occupied state 100% of the time. The sched- ules also can be bypassed by forcing the CHILLER START/ STOP parameter on the STATUS01 screen to START. For more information on forced starts, see Local Start-Up, page 43. The schedules also can be overridden to keep the chiller in an occupied state for up to 4 hours, on a one-time basis.

NOTE: A parameter value can be forced (changed by an operator) from the LID screen or from another control de- vice such as a CCN terminal. For example, if the CHILLER START/STOP parameter is set to START, the operator can go to the LID and change the value to STOP to force the chiller to stop.

Figure 14 shows a schedule for a typical office building time schedule, with a 3-hour, off-peak cool down period from midnight to 3 a.m., following a weekend shutdown. For ex- ample, holiday periods are set to be unoccupied 24 hours per day. The building operates Monday through Friday, 7:00 a.m. to 6:00 p.m., with a Saturday schedule of 6:00 a.m. to 1:00 p.m., and includes the Monday midnight to 3:00 a.m. weekend cool-down schedule.

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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 17EX Chiller Familiarization IntroductionAbbreviations 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 Psio LIDPIC Tewac Equip GND ÐGRD General LID Operation and Menus FigPROCESSOR/SENSOR INPUT/OUTPUT Module Psio 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 SelectMenu 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 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 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 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 900 500 901 7000 1000 7001-14500 2500 Inspect WiringCheck Optional Pumpout Compressor Water Pip External Gear Pre-Start Checks Recommended Motor Fastener Tightening TorquesExternal 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 Charge Refrigerant into Chiller Initial START-UPControl Test Menu Functions Tests to be Devices Tested PerformedInitial Motor START-UP Dry Run to Test Start-Up SequenceCheck Motor Rotation 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 FiltersPumpout Compressor OIL17EX Chiller Oil Specications 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 ModuleGRD Processor/Sensor Input/Output Module Psio FigStarter Management Module SMM Fig 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 101102 Ð Total Motor Weight, English lbÐ Total Motor Weight, SI kg Marine Waterbox Cover Weights NIH Waterbox Cover WeightsApproximate Refrigerant HCFC-134a Charge 103104 Auxiliary Systems, Electrical DataRelief Valve Locations and Data Compressor Fits and Clearances 105Measure 106Clearance Type Description 17FX Tabulation Ð Impeller Clearances Open-Drive Compressors107 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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