4.0OPERATION

Table 4

Monitoring features

 

 

 

 

 

 

 

 

Monitoring Features

 

“S” Package

“C” Package

“D” Package

 

 

 

 

 

LED Status Indicators

 

 

 

 

 

 

Built-In Component Integrity Test

 

(BICIT)

 

 

 

 

 

 

 

 

 

 

 

 

Sonic Alarm

 

 

 

 

 

 

Form C Dry Contacts

 

 

 

 

 

 

Surge Counter

 

 

 

 

 

 

 

Swell Counter

 

 

 

 

 

 

 

 

Remote Monitor Panel

 

Optional

Optional

Optional

 

 

 

 

 

 

Figure 4 Operation controls and indicators

Status LED Indicators—Green and red LEDs for each protected phase provide a visual status summary of all surge modules within device.

Full Protection LEDs—Green LEDs are illuminated only when all surge components are at 100% percent efficiency.

Reduced Protection—Red LED illuminated only when protection has been reduced by off-line surge components such as open fuse links.

Built-In Component Integrity Test (BICIT)—While the monitoring circuitry provides visual status during operation, the built-in test circuitry will verify that every fuse link and associated MOV is operational. The built-in-test may be operated easily by simply pressing one push button during normal operation. The BICIT cycles through each phase bank including neutral-ground sending out a test request signal to all modules. If all fuse links are in intact the red reduced-pro- tection LED for the particular bank in test will illuminate for a two to four seconds. Should this light stay lit for more than 5 seconds, one module in that bank has at least one open fuse link.

While testing, the Test LED will illuminate. Also, during the built-in test sequence, the alarm should sound for each bank. Pressing the alarm disable switch before or during the test will silence the alarm.

Sonic Alarm—If one or more of the surge modules require replacement, an audible alarm is acti- vated to draw attention to the fact that repair service is required to restore the system to normal operation. An audible alarm disable button is provided to silence the alarm. The system will auto- matically reset itself after repair.

8Operation

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Liebert II manual Operation, Monitoring features

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.