Carrier 19XL specifications Starting Equipment, Unit-Mounted Solid-State Starter Optional

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STARTING EQUIPMENT

The 19XL requires a motor starter to operate the centrif- ugal hermetic compressor motor, the oil pump, and various auxiliary equipment. The starter serves as the main ®eld wiring interface for the contractor.

Three types of starters are available from Carrier Cor- poration: solid-state, wye-delta, and across-the-line starters. See Carrier Speci®cation Z-375 for speci®c starter require- ments. All starters must meet these speci®cations in order to properly start and satisfy mechanical safety requirements. Starters may be supplied as separate, free-standing units, or may be mounted directly on the chiller (unit mounted) for low-voltage units only.

Inside the starter are 3 separate circuit breakers. Circuit breaker CB1 is the compressor motor circuit breaker. The disconnect switch on the starter front cover is connected to this breaker. Circuit breaker CB1 supplies power to the com- pressor motor.

The main circuit breaker (CB1) on the front of the starter disconnects the main motor current only. Power is still energized for the other circuits. Two more circuit break- ers inside the starter must be turned off to disconnect power to the oil pump, PIC controls, and oil heater.

Circuit breaker CB2 supplies power to the control center, oil heater, and portions of the starter controls. Circuit breaker CB3 supplies power to oil pump. Both of these circuit break- ers are wired in parallel with CB1 so that power is supplied to them if the CB1 disconnect is open.

All starters are shipped with a Carrier control module called the Starter Management Module (SMM). This module controls and monitors all aspects of the starter. See the Con- trols section on page 11 for additional SMM information. All starter replacement parts are supplied by the starter manufacturer.

Unit-Mounted Solid-State Starter (Optional)

ÐThe 19XL may be equipped with a solid-state, reduced- voltage starter (Fig. 5 and 6). This starter provides on-off control of the compressor motor as its primary function. Using this type of starter reduces the peak starting torque, reduces the motor inrush current, and decreases mechanical shock. This is summed up by the phrase ``soft starting.''

Two varieties of solid-state starters are available as a 19XL option (factory supplied and installed). When a unit-mounted, optional, solid-state starter is purchased with the 19XL, a Benshaw, Inc. solid-state starter will be shipped with the unit. See Fig. 5. The solid-state starter's manufacturer name will be located inside the starter access door. See Fig. 6.

These starters operate by reducing the starting voltage. The starting torque of a motor at full voltage is typically 125% to 175% of the running torque. When the voltage and the current are reduced at start-up, the starting torque is reduced as well. The object is to reduce the starting voltage to just the voltage necessary to develop the torque required to get the motor moving. The voltage and current are then ramped up in a desired period of time. The voltage is reduced through the use of silicon controlled recti®ers (SCR). Once full volt- age is reached, a bypass contactor is energized to bypass the SCRs.

When voltage is supplied to the solid-state circuitry, the heat sinks within the starter are at line voltage. Do not touch the heat sinks while voltage is present or serious injury will result.

LEGEND

1Ð Field Wiring Terminal Strips (TB2 and TB3)

2Ð Circuit Breaker 1, 2, 3, 4

3Ð Overload Unit

4Ð Solid-State Controller

5Ð Silicon Controlled Recti®er (SCR) LED (One of 6)

6Ð Starter Fault and Run LEDs

7Ð Voltmeter (Optional)

8Ð Ammeter (Optional)

9Ð SCR (One of 6)

10Ð Voltage LED

11Ð Starter Management Module (SMM)

12Ð Pilot Relays (PR1 to PR5)

13Ð Starter Access Door

Fig. 5 Ð Benshaw, Inc. Solid-State Starter,

Internal View

Fig. 6 Ð Typical Starter External View

(Solid-State Starter Shown)

There are a number of LEDs (light-emitting diodes) that are useful in troubleshooting and starter check-out on Benshaw, Inc. solid-state starters. These are used to indicate:

·voltage to the SCRs

·SCR control voltage

·power indication

·proper phasing for rotation

·start circuit energized

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Contents Start-Up, Operation, and Maintenance Instructions Safety ConsiderationsContents Contents Introduction Abbreviations and ExplanationsRefrigeration Cycle Chiller FamiliarizationMOTOR/OIL Refrigeration Cooling Cycle 19XL Rear View Condenser In/Out Temperature Sensors Take-Apart Rabbet Fit ConnectorCooler In/Out Temperature Sensors Cooler Pressure Schrader FittingLubrication Cycle Refrigerant Motor Cooling and Oil Cooling CyclesLubrication System Starting Equipment Unit-Mounted Solid-State Starter OptionalMajor PIC Components Panel Locations DenitionsControls PIC Component Panel19XL Controls and Sensor Locations Pressure Transducer, TypicalPower Panel with Options Control and OIL Heater Voltage Selector S1General LID Operation and Menus FigSelect − Example of Point Status Screen Status01 Override OperationsExample of Time Schedule Operation Screen 19XL Menu Structure 19XL Service Menu Structure 19XL Service Menu Structure Setpoint Example of Set Point ScreenExample 1 Ð STATUS01 Display Screen Description Range Units Reference Point Name Alarm HistoryLID Screens Menu Status SelectExample 4 Ð Setpoint Display Screen Example 2 Ð STATUS02 Display ScreenExample 3 Ð STATUS03 Display Screen MenuECW Control Option Example 5 Ð Configuration Config Display ScreenExample 6 Ð LEAD/LAG Configuration Display Screen ICE Build TerminationExample 7 Ð SERVICE1 Display Screen Example 9 Ð SERVICE3 Display Screen Example 8 Ð SERVICE2 Display ScreenSpare Alert Enable Menu ServiceDischarge Temperature Example 10 Ð Maintenance MAINT01 Display ScreenExample 11 Ð Maintenance MAINT02 Display Screen Bearing TemperatureExample 13 Ð Maintenance MAINT04 Display Screen Example 12 Ð Maintenance MAINT03 Display ScreenDescription RANGE/STATUS Units Reference Point Name PIC System Functions Page Protective Safety Limits and Control Settings Capacity Overrides Page Page Hgbp Lead/Lag ControlECW Hot Gas BypassPage Ice Build Control Cent CapacityPage Example of Attach to Network Device Screen To LOG onSTART-UP/SHUTDOWN/RECYCLE Sequence FigRecycle Restart Delta T Job Data Required Using the Optional Storage Tank and PumpoutBefore Initial START-UP Equipment Required19XL Leak Test Procedures Page Ð HCFC-22 Pressure Ð Temperature F Ð HCFC-22 Pressure Ð Temperature CÐ HFC-134a Pressure Ð Temperature C Ð HFC-134a Pressure Ð Temperature FTemperature Pressure Page Inspect Wiring Check Optional Pumpout Compressor Water PipCheck Starter MECHANICAL-TYPE StartersBenshaw, Inc. Solid-State Starter Power Stack BENSHAW, INC. SOLID-STATE StarterPower Up the Controls and Check the Oil Heater Set Up Chiller Control CongurationLoad Surge Prevention Occurs TOO Soon Occurs TOO Late Amps Correction Factors For 19XL Motors Volt Motor CodeControl Test Menu Functions Charge Refrigerant into Chiller19XL Chiller Equalization Without PUMP- OUT Unit Tests to be Devices Tested PerformedCooler Refrigerant Charges19XL Total Refrigerant Charge SizeDry Run to Test Start-Up Sequence Initial START-UPCheck Rotation Operating Instructions Check Oil Pressure and Compressor StopCalibrate Motor Current Operator DutiesTo Stop the Chiller Plant Transfer Refrigerant from Storage Tank to Chiller Pumpout and Refrigerant Transfer ProceduresOperating the Optional Pumpout Compressor TstatChillers with Isolation Valves Transfer the Refrigerant from Chiller to Storage TankTest After Service, Repair, or Major Leak Ð If General MaintenanceReturn Refrigerant to Normal Operating Conditions Weekly Maintenance Guide Vane Actuator LinkageCheck Safety and Operating Controls Monthly Scheduled MaintenanceTo Change the OIL Compressor Bearing and Gear Mainten Inspect the Heat Exchanger TubesOptional Pumpout System Controls Troubleshooting Guide MAINT03 MAINT01MAINT02 MAINT04Shutdown with ON/OFF/RESET-OFF Timing OUT or Timed OUTNormal or AUTO.-RESTART Recycle ShutdownAutorestart in Progress LOW Chilled Water Normal RUN with RESET, TEMPERATURE, or Demand Compressor Jumpstart and Refrigerant ProtectionOUT-OF-RANGE Sensor Failures Normal RUN Overrides Active AlertsLimited Chiller Protect Limit Faults Protective LimitChiller Alerts Spare Sensor Alert MessagesOther PROBLEMS/MALFUNCTIONS DESCRIPTION/MALFUNCTION Probable CAUSE/REMEDYÐ Thermistor Temperature F vs Resistance/Voltage Drop Temperature Voltage Resistance DropÐ Thermistor Temperature C vs Resistance/Voltage Drop Module Address Control ModulesInput Options Module Processor Module Psio Fig Starter Management Module SMM FigOptions Module Installation Switch Options Setting ModuleTypical Benshaw, Inc. Solid-State Starter internal View Page Page RV1 Benshaw, Inc. Solid-State Starter Troubleshooting GuideProblem Probable Causes Area of Correction SCRCooler Heat Exchanger DataAdditional Data for Marine Waterboxes CondenserCondensers Waterbox Cover WeightsCoolers 1034 kPaCompressor Weights Compressor/Motor WeightsOptional Pumpout System Electrical Data Compressor Fits and Clearances Ft-lb Compressor Assembly TorquesDescription Torque ``ZComm CLRCOM EXTPage CLR Page Chiller Power Panel, Starter Assembly Motor Wiring Schematic Chiller Power Panel, Starter Assembly Motor Wiring Schematic GFR PMRPOT HPSTypical 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.

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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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