Carrier 19XL specifications Start-Up/Shutdown/Recycle, Sequence Fig

Page 39

6.Press NEXT to highlight the holiday table that you

wish to view or change. Each table is one holiday pe- riod, starting on a speci®c date, and lasting up to 99 days.

7.Press SELECT to access the holiday table. The Con-

®guration Select table now shows the holiday start month and day, and how many days the holiday period will last.

8.Press NEXT or PREVIOUS to highlight the month, day, or duration.

9.Press SELECT to modify the month, day, or duration.

10.Press INCREASE or DECREASE to change the se- lected value.

11.Press ENTER to save the changes.

12.Press EXIT to return to the previous menu.

Fig. 23 Ð Example of Holiday Period Screen

START-UP/SHUTDOWN/RECYCLE

SEQUENCE (Fig. 24)

Local Start-Up Ð Local start-up (or a manual start-up)

is initiated by pressing the LOCAL menu softkey which is

on the default LID screen. Local start-up can proceed when Time Schedule 01 is in OCCUPIED mode, and after the in- ternal 15-minute start-to-start and the 3-minute stop-to-start inhibit timers have expired (on PSIO software Version 08 and lower or a 1-minute stop-to-start timer on PSIO Soft- ware Version 09 and higher).

The chiller start/stop status point on the Status01 table may be overridden to start, regardless of the time schedule, in order to locally start the unit. Also, the remote contacts may be enabled through the LID and closed to initiate a start-up.

Whenever the chiller is in LOCAL control mode, the PIC will wait for Time Schedule 01 to become occupied and the remote contacts to close, if enabled. The PIC will then per- form a series of pre-start checks to verify that all pre-start alerts and safeties are within the limits shown in Table 3. The run status line on the LID now reads ``Starting.'' If the checks are successful, the chilled water/brine pump relay will be energized. Five seconds later, the condenser pump relay is energized. Thirty seconds later the PIC monitors the chilled water and condenser water ¯ow switches, and waits until the WATER FLOW VERIFY TIME (operator con®gured, default 5 minutes) to con®rm ¯ow. After ¯ow is veri®ed, the chilled water/brine temperature is compared to CONTROL POINT plus DEADBAND. If the temperature is less than or equal to this value, the PIC will turn off the condenser pump relay

AÐ START INITIATED Ð Prestart checks made; evaporator pump started

BÐ Condenser water pump started (5 seconds after A)

CÐ Water ¯ows veri®ed (30 seconds to 5 minutes maximum after B). Chilled water temperatures checked against con- trol point. Guide vanes checked for closure. Oil pump started; tower fan control enabled.

DÐ Oil pressure veri®ed (30 seconds minimum, 300 seconds maximum after C)

EÐ Compressor motor starts, compressor ontime and serv- ice ontime start, 15-minute inhibit timer starts (10 seconds after D), total compressor starts advances by one, number of starts over a 12-hour period advances by one

FÐ SHUTDOWN INITIATED Ð Compressor motor stops, com- pressor ontime and service ontime stops, 3-minute inhibit timer starts on PSIO Software Version 08 and lower and 1-minute inhibit timer starts for PSIO Software Version 09 and higher.

GÐ Oil pump and evaporator pumps deenergized (60 seconds after F). Condenser pump and tower fan control may con- tinue to operate if condenser pressure is high. Evaporator

pump may continue if in RECYCLE mode.

O/A Ð Restart permitted (both inhibit timers expired) (minimum of 15 minutes after E; [minimum of 3 minutes after F on PSIO Software Version 08 and lower] [minimum of 1 minute after F on PSIO Software Version 09 and higher]

Fig. 24 Ð Control Sequence

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Contents Safety Considerations Start-Up, Operation, and Maintenance InstructionsContents Contents Abbreviations and Explanations IntroductionChiller Familiarization Refrigeration CycleMOTOR/OIL Refrigeration Cooling Cycle 19XL Rear View Cooler Pressure Schrader Fitting Take-Apart Rabbet Fit ConnectorCooler In/Out Temperature Sensors Condenser In/Out Temperature SensorsRefrigerant Motor Cooling and Oil Cooling Cycles Lubrication CycleLubrication System Unit-Mounted Solid-State Starter Optional Starting EquipmentPIC Component Panel DenitionsControls Major PIC Components Panel LocationsPressure Transducer, Typical 19XL Controls and Sensor LocationsControl and OIL Heater Voltage Selector S1 Power Panel with OptionsLID Operation and Menus Fig GeneralSelect Override Operations − Example of Point Status Screen Status01Example of Time Schedule Operation Screen 19XL Menu Structure 19XL Service Menu Structure 19XL Service Menu Structure Example of Set Point Screen SetpointMenu Status Select Description Range Units Reference Point Name Alarm HistoryLID Screens Example 1 Ð STATUS01 Display ScreenMenu Example 2 Ð STATUS02 Display ScreenExample 3 Ð STATUS03 Display Screen Example 4 Ð Setpoint Display ScreenICE Build Termination Example 5 Ð Configuration Config Display ScreenExample 6 Ð LEAD/LAG Configuration Display Screen ECW Control OptionExample 7 Ð SERVICE1 Display Screen Menu Service Example 8 Ð SERVICE2 Display ScreenSpare Alert Enable Example 9 Ð SERVICE3 Display ScreenBearing Temperature Example 10 Ð Maintenance MAINT01 Display ScreenExample 11 Ð Maintenance MAINT02 Display Screen Discharge TemperatureExample 12 Ð Maintenance MAINT03 Display Screen Example 13 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 Hot Gas Bypass Lead/Lag ControlECW HgbpPage Cent Capacity Ice Build ControlPage To LOG on Example of Attach to Network Device ScreenSequence Fig START-UP/SHUTDOWN/RECYCLERecycle Restart Delta T Equipment Required Using the Optional Storage Tank and PumpoutBefore Initial START-UP Job Data Required19XL Leak Test Procedures Page Ð HCFC-22 Pressure Ð Temperature C Ð HCFC-22 Pressure Ð Temperature FÐ HFC-134a Pressure Ð Temperature F Ð HFC-134a Pressure Ð Temperature CTemperature Pressure Page Check Optional Pumpout Compressor Water Pip Inspect WiringMECHANICAL-TYPE Starters Check StarterBENSHAW, INC. SOLID-STATE Starter Benshaw, Inc. Solid-State Starter Power StackSet Up Chiller Control Conguration Power Up the Controls and Check the Oil HeaterLoad Surge Prevention Occurs TOO Soon Occurs TOO Late Volt Motor Code Amps Correction Factors For 19XL MotorsTests to be Devices Tested Performed Charge Refrigerant into Chiller19XL Chiller Equalization Without PUMP- OUT Unit Control Test Menu FunctionsSize Refrigerant Charges19XL Total Refrigerant Charge CoolerInitial START-UP Dry Run to Test Start-Up SequenceCheck Rotation Operator Duties Check Oil Pressure and Compressor StopCalibrate Motor Current Operating InstructionsTo Stop the Chiller Plant Tstat Pumpout and Refrigerant Transfer ProceduresOperating the Optional Pumpout Compressor Transfer Refrigerant from Storage Tank to ChillerTransfer the Refrigerant from Chiller to Storage Tank Chillers with Isolation ValvesGeneral Maintenance Test After Service, Repair, or Major Leak Ð IfReturn Refrigerant to Normal Operating Conditions Guide Vane Actuator Linkage Weekly MaintenanceScheduled Maintenance Check Safety and Operating Controls MonthlyTo Change the OIL Inspect the Heat Exchanger Tubes Compressor Bearing and Gear MaintenOptional Pumpout System Controls Troubleshooting Guide MAINT04 MAINT01MAINT02 MAINT03Timing OUT or Timed OUT Shutdown with ON/OFF/RESET-OFFRecycle Shutdown Normal or AUTO.-RESTARTAutorestart in Progress LOW Chilled Water Compressor Jumpstart and Refrigerant Protection Normal RUN with RESET, TEMPERATURE, or DemandNormal RUN Overrides Active Alerts OUT-OF-RANGE Sensor FailuresLimited Protective Limit Chiller Protect Limit FaultsSpare Sensor Alert Messages Chiller AlertsDESCRIPTION/MALFUNCTION Probable CAUSE/REMEDY Other PROBLEMS/MALFUNCTIONSTemperature Voltage Resistance Drop Ð Thermistor Temperature F vs Resistance/Voltage DropÐ Thermistor Temperature C vs Resistance/Voltage Drop Control Modules Module AddressInput Options Module Starter Management Module SMM Fig Processor Module Psio FigOptions Module Switch Options Setting Module InstallationTypical Benshaw, Inc. Solid-State Starter internal View Page Page SCR Benshaw, Inc. Solid-State Starter Troubleshooting GuideProblem Probable Causes Area of Correction RV1Condenser Heat Exchanger DataAdditional Data for Marine Waterboxes Cooler1034 kPa Waterbox Cover WeightsCoolers CondensersCompressor/Motor Weights Compressor WeightsOptional Pumpout System Electrical Data Compressor Fits and Clearances ``Z Compressor Assembly TorquesDescription Torque Ft-lbEXT CLRCOM CommPage CLR Page Chiller Power Panel, Starter Assembly Motor Wiring Schematic Chiller Power Panel, Starter Assembly Motor Wiring Schematic HPS PMRPOT GFRTypical Wye-Delta Unit Mounted Starter Wiring Schematic Index Index Copyright 1996 Carrier Corporation

19XL specifications

The Carrier 19XL is a highly regarded commercial heating and cooling solution, designed to provide optimum performance and energy efficiency in various applications. This rooftop unit is engineered to meet the diverse needs of businesses, making it an ideal choice for those requiring reliable climate control in their facilities.

One of the standout features of the Carrier 19XL is its advanced cooling and heating capabilities. The unit utilizes a high-efficiency scroll compressor that ensures a quieter operation and improved reliability. The system can operate across a wide range of temperatures, making it versatile for various climates. Additionally, it offers both cooling and heating options, allowing for year-round comfort.

Energy efficiency is a focal point of the 19XL design. With an impressive Seasonal Energy Efficiency Ratio (SEER) and Heating Seasonal Performance Factor (HSPF), this unit not only helps reduce energy costs but also supports environmental sustainability initiatives. The unit is equipped with environmentally friendly refrigerants, further contributing to lower greenhouse gas emissions.

The Carrier 19XL features a user-friendly control system, allowing for easy monitoring and management of the unit's performance. This control system is designed to maximize energy savings, offering features such as demand control ventilation and integrated economizers that facilitate the use of outdoor air for cooling, reducing reliance on mechanical systems when conditions allow.

Construction-wise, the Carrier 19XL is built to withstand tough environmental conditions. Its robust cabinet is made from galvanized steel, providing durability and protection against the elements. The design also includes insulation to minimize noise levels, creating a more comfortable indoor environment.

Maintenance is a key consideration in the design of the 19XL. The unit features accessible service ports and a simplified access panel, allowing technicians to perform routine maintenance with ease. This proactive design helps ensure the longevity of the system and minimizes downtime, keeping operations running smoothly.

In summary, the Carrier 19XL is an exceptional choice for commercial heating and cooling needs. With its energy-efficient features, advanced technology, and durable construction, it stands out as a reliable solution for businesses looking for sustainable climate control options.
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