Air-Cooled Models—Self-Contained Compressor

3.5Air-Cooled Condenser with Liebert Lee-Temp™“Flooded Condenser” Head Pressure Control System

The Liebert Lee-Temp system consists of a modulating type head pressure control valve and insulated receivers with heater pads to ensure operation at ambient temperatures as low as -30°F (-34.4°C). The Liebert Lee-Temp system can be used with any compressor choice.

Liebert Lee-Temp Piping

A discharge line and a liquid line must be field-installed between the indoor unit and the outdoor condenser. See Figures 17 and 18 for details.

Liebert Lee-Temp Controlled Materials Supplied

•Built-in, pre-wired condenser control box

•Air-Cooled condenser

•Piping access cover to be reinstalled when piping is complete (models with one to four fans only)

•Bolts—four per leg (3/8" x 5/8")

•Terminal block for two-wire, 24V interlock connection between unit and condenser

•Condenser legs—four with 1-fan, six on two-, three- and six-fan models and eight on four- and eight-fan models

•Bolts—six per receiver (3/8" x 1")

•Liebert Lee-Temp system:

•Insulated storage receiver

•Head pressure control valve with integral check valve

•Service valve

•Pressure relief valve

•Liquid level sight glass

•Check valve

NOTE

Liebert Lee-Temp heater pads require a separate, continuous electrical source. See nameplate on unit for proper voltage.

Liebert Lee-Temp Leak Check and Evacuation Procedure

Proper leak check and evacuation can be accomplished only with all system solenoid valves open and check valves accounted for.

NOTE

Systems with scroll or digital scroll compressors include a factory-installed check valve and an additional downstream Schrader valve with core in the compressor discharge line. Proper evacuation of the condenser side of the compressor can be accomplished only using the downstream Schrader valve. See piping schematic (Figure 18).

1.If unit power is available, open the unit liquid line solenoid valves using the evacuation function in the diagnostic section of the Liebert iCOM® control. If unit power is not available, a field- supplied 24VAC / 75VA power source must be directly connected to each of the unit solenoid valves.

2.Attach a jumper hose from the service valve fitting on the outlet of the receiver and the Schrader fitting on the discharge header of the condenser. Front-seat the service valve approximately two (2) turns.

3.For scroll and digital scroll compressors, connect refrigerant gauges to the suction rotalock valves and discharge line Schrader valves (see Note above).

4.Open the service valves and place a 150 PSIG (1034 kPa) of dry nitrogen with a tracer of refrigerant. Check system for leaks with a suitable leak detector.

5.After completion of leak testing, release the test pressure (per local code) and pull an initial deep vacuum on the system with a suitable pump.

Liebert® Challenger 3000™

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Emerson 3000 installation manual Liebert Lee-Temp Piping, Liebert Lee-Temp Controlled Materials Supplied
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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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