Water-Cooled Models—Self-Contained 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.

4.4.2Adjustment

Both pressure thresholds can be shifted simultaneously over a 50psi (345kPa) range (the 35psi [241kPa] differential remains constant). The ball valve setpoint offset parameter in the Liebert iCOM® Service menu can be adjusted from 0 to 50 PSI (345 kPa) to raise or lower the control band similar to the pressure adjustment on a water regulating valve. Changing the setpoint offset will adjust the pressure thresholds for both circuits. Units are factory-set at a 30psi (207 kPa) setpoint offset (30psi [207 kPa] above minimum). This results in a 220psiA (1517kPa) lower threshold and a 255psiA (1758kPa) upper threshold pressure.

4.4.3Startup

The setpoint offset is adjusted to the minimum value during startup, then changes to the set value once the compressor reaches normal operating pressures. Changes in fluid temperature could cause pressure changes that do not result in valve movement within the deadband. Fan cycling stats should be set to prevent continuous fluid temperature swings greater than 10°F (5.6°C).

4.4.4Location

The motorized ball valve is located in the condenser fluid return line. Three-way valves are piped in a mixing arrangement with the common port at the valve outlet.

4.4.5Manual Control

The valve can be manually set by disconnecting AC power, depressing the manual override button on the valve actuator and adjusting the valve position with the handle. The motorized ball also can be controlled through the Liebert iCOM’s Service menu using manual mode to override the normal control.

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Liebert® Challenger 3000™

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Emerson 3000 installation manual Control Method, Startup, Location, Manual Control
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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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