Operation

! WARNING

Risk of electric shock. Can cause injury or death.

The Liebert iCOM microprocessor does not isolate power from the unit, even in the “Unit Off” mode. Some internal components require and receive power even during the “Unit Off” mode of Liebert iCOM control.

The only way to ensure that there is NO voltage inside the unit is to install and open a remote disconnect switch. Refer to unit electrical schematic.

Autorestart

When there is a loss of power to the cooling unit and power comes back, the unit will return to its pre- vious operating status—On if it was On before the power failed, Off if it was Off.

When power returns, the autorestart time—time-selectable: Single Unit Auto Restart (Service Menu, Options Setup)—controls the start of the unit. The autorestart time runs in a loop, starting the next unit each time when elapsed. With units in a U2U network, the autorestart will begin with Unit #1.

Loss of Power Alarm

A Loss of Power Alarm is activated when power is restored after an interruption. If acknowledged, the alarm resets automatically after 30 minutes. This alarm can be set to different event types (Message, Alarm or Warning) and can be disabled under menu item Loss of Power (Service Menu, Set Alarms).

NOTE

Loss of power alarm will be activated only on units that had the fan on before power was lost.

Fan Alarm / Fan Protection Settings

The fan operation is protected by two devices: motor protection (optional) and a differential pressure switch. The differential pressure switch ensures that the blower(s) are moving air and the motor pro- tection monitors for main fan overload. If either protection device triggers, an alarm will be announced by a buzzer, alarm relay and event to monitoring after an adjustable time-delay (Main Fan Overload and Loss Of Airflow in Service Menu, Set Alarms).

The time delay at the unit start is always five seconds shorter than the control delay (to avoid short component starting when the fan is not working). During operation, the fan delay is fixed to

15 seconds.

There are two selection possibilities for both, Loss Of Airflow and Main Fan Overload:

•Shutdown—stops the unit (intended for DX models).

•Disable—stops the humidifier, electrical heaters and dehumidification; allows cooling and free-cooling only (intended for chilled water models / external cooling).

NOTE

When the Main Fan Overload alarm is active, the Loss of Airflow alarm is masked out. If a loss of airflow occurs, the compressor, heaters and humidifier will all turn Off until airflow is restored.

5.1.2General Compressor Requirements Low-Pressure Time Delay

When the compressor starts, the low-pressure input is ignored for a selected period of time based on the setting of the Low Pressure Alarm Delay (Service Menu, Options Setup). This permits the pumps to begin operating normally without nuisance alarms at startup.

NOTE

Low-pressure condition could be read through contacts or through pressure transducers with threshold setting.

28

Page 33 Page 35
Page 34
Image 34
Emerson 3000/ITR manual Autorestart, Loss of Power Alarm, Fan Alarm / Fan Protection Settings
Page 33 Page 35

3000/ITR specifications

The Emerson 3000/ITR is a powerful and versatile instrument designed for industrial automation and process control applications. This modular platform integrates advanced features and technologies tailored to meet the needs of diverse industries including oil and gas, pharmaceuticals, and manufacturing.

One of the main features of the Emerson 3000/ITR is its exceptional scalability. The system can be easily expanded to accommodate growing operational demands. With its modular architecture, operators can add or remove components without significant downtime, ensuring continuous productivity. This flexibility allows businesses to adapt their systems to changing environments and requirements seamlessly.

The Emerson 3000/ITR leverages state-of-the-art communication technologies to ensure reliable data exchange between devices. With support for various protocols, including Hart, Modbus, and Profibus, the system can easily integrate with existing infrastructure. This adaptability enhances interoperability and simplifies the communication between field devices and control systems, promoting efficient data handling.

Built with robust security features, the Emerson 3000/ITR guarantees the integrity of sensitive data. The platform incorporates advanced encryption techniques and user authentication protocols to protect against potential cyber threats. This focus on security is essential in today’s digitally connected industrial environments.

Another key characteristic of the Emerson 3000/ITR is its user-friendly interface. The system is designed with operators in mind, featuring intuitive controls and comprehensive dashboards that provide real-time visibility into process performance. The graphical user interface simplifies complex operations, enabling quick decision-making and minimizing human errors.

Additionally, the Emerson 3000/ITR supports advanced analytics capabilities that enhance operational efficiency. By leveraging predictive analytics and machine learning algorithms, the system can identify patterns and anomalies, allowing for proactive maintenance and reducing the risk of unexpected downtime. This predictive maintenance approach helps organizations optimize their resources and extend the lifecycle of their equipment.

In conclusion, the Emerson 3000/ITR stands out as an exemplary solution for modern industrial automation. Its modular design, robust communication support, strong security measures, user-friendly interface, and advanced analytics capabilities make it an ideal choice for businesses looking to enhance their operational efficiency and adaptability. As industries continue to evolve, the Emerson 3000/ITR remains at the forefront, facilitating smarter and more efficient automation processes.
Top Page Image Contents