Liebert II manual Operation

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Form C Dry Contacts—Dual summary alarm Form C (1 N.O. and 1 N.C.) relay contacts are provided for remote indication of each failed surge current modules. The summary alarm contacts terminals are located on the PC board inside the unit. Contacts are rated for 5 amps at 240 VAC with a power factor of 1.0. The states of the Form C Dry Contacts are determined with power applied. Connection to the Form C Dry Contacts are provided by #18 AWG wires attached to the status module. The yellow wire is for connection to the NO contact. The blue wire is for connection to the NC contact. The orange wire is for connection to the common point of the Form C Dry Con- tacts.

Surge Counter—The Surge Counter monitors line to ground transient voltages. This circuit totalizes all surges that deviate from the line sine wave envelope by more than 125 volts. The counter is AC coupled and rejects transient voltages longer than 100µs.

Swell Counter—The Swell Counter monitors all line to line and line to neutral voltages. It is fac- tory set to record whenever the peak voltage on any normal mode exceeds the MCOV of the TVSS for more than 100µs. This allows the counter to record temporary line over voltages that many result from utility switching, line regulation problems, etc.

Remote Monitor Panel—A remote monitor panel is available to provide unit status and alarm information at a location up to 500 feet away from the Liebert TVSS System. (See Table 4.) Oper- ation of the Remote Monitor Panel is similar to the unit system monitor panel. The “Enable” posi- tion of the switch is the normal position, which allows audible alarm operation. The “Disable” switch position silences the audible alarm. The “Test” position tests the audible alarm and indica- tor lights. The remote monitor panel requires an external source of power. Standard units are fur- nished with a six-foot line-cord with a 5-15P NEMA plug.

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Contents Interceptor Power ProtectionPage Table of Contents Figures Introduction Unpacking and Preliminary Inspection Door Closing AdjustmentsHandling Considerations StorageAll voltage Suggested wire and breaker size Voltage Ratings and Power Source ConfigurationsElectrical Connections Parallel Connection see Figures 2Voltage ratings and power source configurations Typical parallel connections with internal rotary disconnect System Grounding and Bonding Operation Monitoring featuresOperation Service TroubleshootingCorrective Maintenance Preventive Maintenance-Inspection and CleaningGeneral Limited WarrantyItems Not Covered By Warranty Company Behind the Products Interceptor Transient Voltage Surge Suppressor

II specifications

Liebert II is a high-performance precision cooling system designed specifically for mission-critical applications, ensuring that data center facilities maintain optimal temperatures for sensitive equipment. As part of Emerson's extensive line of cooling solutions, the Liebert II is particularly valued for its reliability, efficiency, and adaptability.

One of the standout features of the Liebert II is its sophisticated cooling technology, which incorporates both chilled water and air-cooled systems. This dual capability allows it to operate effectively in a variety of environments, whether in a small server room or a large data center. The unit is engineered to deliver consistent cooling across different loads, catering to fluctuating demands characteristic of modern IT environments.

In terms of performance, the Liebert II boasts variable speed fans that adjust to the cooling requirements in real-time, thus maximizing energy efficiency. This feature not only reduces operational costs but also minimizes the carbon footprint of the facility. Furthermore, the system is designed with advanced electronic controls that offer precise temperature management, allowing for rapid response to any changes in operating conditions.

The Liebert II also includes state-of-the-art monitoring and control features. It supports integration with advanced Building Management Systems (BMS), providing operators with the tools to oversee performance metrics, detect potential issues before they escalate, and implement energy-saving strategies. This level of operational visibility is crucial for maintaining uptime in critical environments.

Another significant characteristic of the Liebert II is its modular design, which simplifies maintenance and scalability. Facilities can easily upgrade or expand the system as needs evolve, ensuring that the cooling solution can keep pace with technological advancements and increased loads. The design also promotes ease of access for service technicians, minimizing downtime during maintenance activities.

Finally, noise reduction is an important aspect of the Liebert II’s design. The system operates quietly, making it suitable for environments where noise levels must be kept at a minimum, such as offices adjacent to IT spaces.

In summary, the Liebert II stands out as a top choice for ensuring reliable precision cooling in data centers, thanks to its advanced technology, energy efficiency, modular design, and operational flexibility. These attributes position it as an essential component in the infrastructure of any modern facility relying on high-performance computing.
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