Emerson 3000 Motorized Ball Valve-Digital Scroll Compressors, Manual Flushing, Control

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Water-Cooled Models—Self-Contained Compressor

Figure 22 Metrex Valve adjustment

Adjusting collar nut

Table 12 Refrigerant control settings psi (kPa)

Low Pressure

Low Pressure

High Pressure

Cut Out

Cut In

Cut Out

 

 

 

20 (137.9)

65 (448.2)

400 (2758)

 

 

 

Manual Flushing

The valve may be flushed by rotating the socket head screw clockwise. This screw must be in the OUT position (counterclockwise) for normal valve operation.

4.4Motorized Ball Valve—Digital Scroll Compressors

On digital scroll units, discharge pressure is controlled by a motorized ball valve. During unloaded operation, the pressure changes during each digital cycle could cause excessive repositions with a pressure-operated water regulating valve. The control algorithm for the motorized ball valve uses an intelligent sampling rate and adjustable pressure thresholds to reduce valve repositions. The valve assembly consists of the brass valve, linkage and actuator.

4.4.1Control

The valve actuator operates on 24VAC power and is controlled by a 2-10VDC proportional control sig- nal. The valve will move from fully open to fully closed in 60 seconds. At 2VDC, the valve is closed; at 10VDC, the valve is fully open. There is a 20-second delay to position the motorized ball valve before starting the compressor.

Control Method

The control utilizes an upper and lower pressure threshold with a 35psi (241kPa) deadband to reduce valve movement. If the liquid pressure is between the upper and lower threshold, the valve remains at the current position. If the liquid pressure exceeds the upper threshold the valve opens, and if the pressure falls below the lower threshold the valve closes. There are multiple adjustment bands to ease discharge pressure back into control range.

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Contents Liebert Challenger 3000 with iCOM Page Table of Contents Chilled Water Models Split System ModelsR407C Refrigerant Figures Tables Important Safety Instructions Page System Descriptions Prop Fan Air-Cooled Split SystemsCentrifugal Fan Air-Cooled Water-CooledEquipment Inspection Room PreparationLocation Considerations Equipment HandlingHandling With Skid Unit net weightRemoval of Skid Model Lb kgUpflow BU cabinet dimensions Floor Cutout Dimensions Piping Considerations Drain LinePiping connection size Piping Outlet Locations Piping connections for air-cooled units Upflow models Installation Applicable to all Models Installation Applicable to all Models Installation Applicable to all Models Installation Applicable to all Models Installation Applicable to all Models Installation Applicable to all Models Facility Fluid and Piping Maintenance Electrical ConnectionsHumidifier Supply Water-Optional Infrared Terminal Block for customer connections Downflow Models with Liebert iCOM Upflow Models with Liebert iCOMBalancing the Air Distribution Plenum InstallationUnder-Floor Discharge Systems Ducted ApplicationsChecklist for Completed Installation Condenser Location Line VoltageLow Voltage Air-cooled condenser statistics Recommended line sizes OD copper inches Refrigerant PipingVariable Fan Speed Control Piping Fan Speed Control SystemsEquivalent lengths feet for various pipe fittings Indoor unit refrigerant charge lb kgVariable Fan Speed Control Materials Supplied Variable Fan Speed Charging Fan speed suction pressure transducer settingsFactory Piping Field Piping Factory Piping Lee-Temp Leak Check and Evacuation Procedure Liebert Lee-Temp PipingLiebert Lee-Temp Controlled Materials Supplied Lee-Temp Charging Lee-Temp suction pressure transducer settingsLee-Temp Receiver Refrigerant Level 407CFactory Piping Optional Piping Pressure Relief Condenser Factory Piping Field Piping Factory Piping Field Piping Water Regulating Valve AdjustmentMotorized Ball Valve-Digital Scroll Compressors Refrigerant control settings psi kPaManual Flushing ControlStartup LocationManual Control Drycooler Installation Drycooler LocationPump and Drycooler General Guidelines Glycol PipingDry Bulb Wet Bulb Relative Dew Point Humidity Room dew point temperaturesFilling Instructions Volume in standard Type L copper pipingExpansion Tanks, Fluid Relief Valves and Other Devices Preparing the System for FillingGlycol Solutions Filling the System Ethylene glycol concentrations@ 50F 10C 43-3/16 43-9/16 110 5mm For expansion tank dimensions, see onSee Note 30-1/4 483mm 1097mmDrycooler data Mounting hole dimensional dataGlycol pump data Pump Pump Suction Pump Discharge ConnectionField Piping General arrangement-Glycol-cooled models with digital scroll Field Piping Factorypiping Field Piping Testing Valve Function Glycol Regulating ValveMotor Ball Valve-Digital Scroll Compressors Chilled Water Models WAY Valve Water/Glycol-Cooled Condensing Units Air-Cooled Condensing UnitsRefrigerant Loop Unit refrigerant charge Line charges refrigerant per 100 ft m of Type L copper tubeRecommended refrigerant lines R407C sizes OD copper Quick Connect Fittings Line coupling sizesModel Line Size Coupling Torque Tons OD Cu, Lb-ft Outdoor Air-Cooled Condensing Units Unit Dimensions See TablePFCZ42A-L PFCZ41A-L See Table Outdoor air-cooled condensing unit-top air discharge modelsPiping and electrical connections top air discharge 36-1/4 38-1/2152 Ton High Ambient Ton Quiet-Line Field-supplied unit disconnect switchModel Net Weight 60 Hz 50 Hz Lb kg MC40A MC39A Installing the Indoor Condensing UnitCentrifugal Air-Cooled Condensing Units Indoor centrifugal condensing unitAirflow CFM CMH DuctingPiping Connections DPN000207 Wire connections from evaporatorRev0 ModTon centrifugal air-cooled condensing unit dimensional data AIR Cooled Water Cooled Piping Considerations Water and Glycol-Cooled Condensing UnitsCondenser Water Requirements Regulating ValveTon water/glycol-cooled condensing unit Glycol Systems24V GND Ton water/glycol-cooled condensing unit dimensional data WATER/GLYCOL R407C Refrigerant Temperature Gauge Pressure Psig KPaTemperature Pressure Gauge Psig KPa Calculating SubcoolingExample R407C Refrigerant R407C Refrigerant Page Iti Ti n Ne tThat Te r Ys t
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3000 specifications

The Emerson 3000 is a cutting-edge control system designed to enhance the efficiency, reliability, and precision of industrial operations. Employed across various sectors such as oil and gas, pharmaceutical, food and beverage, and power generation, the Emerson 3000 has gained recognition for its robustness and versatility.

One of the main features of the Emerson 3000 is its advanced process control capability. With integrated control algorithms, it can optimize complex processes in real-time, resulting in significant improvements in production rates and reduced operational costs. The system's predictive analytics capabilities enable operators to anticipate equipment failures and maintenance needs, allowing for proactive management and minimizing downtime.

The Emerson 3000 features a modular architecture, providing flexibility for scaling and customization. Operators can easily tailor the system to fit specific application needs, whether it requires additional control loops or integration with other systems. This adaptability is particularly beneficial for facilities planning for future expansions or modifications.

Another technology highlight of the Emerson 3000 is its seamless integration with the latest Internet of Things (IoT) advancements. The system is designed to communicate effectively with a variety of smart devices and sensors, harnessing data to create insightful analytics that drive operational excellence. This connectivity empowers businesses to leverage big data for improved decision-making and increased agility.

Additionally, the Emerson 3000 incorporates state-of-the-art cybersecurity measures to safeguard critical data and operations. With built-in security protocols and regular updates, the system protects against emerging cyber threats, ensuring the integrity of the control network.

User experience is also a focal point of the Emerson 3000. The intuitive graphical user interface presents complex data in a user-friendly format, making it easier for operators to monitor system performance and respond to alerts quickly. This ease of use contributes to enhanced safety and operational efficiency.

In summary, the Emerson 3000 represents a fusion of advanced process control, modular design, IoT connectivity, robust cybersecurity, and user-centric interface, making it an ideal choice for industries seeking to enhance their operational performance while adapting to ever-evolving technological landscapes.
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