Chapter 4: E2 Controller

8.Observe the indicator symbols in the Main screen to determine if the unit is operating in the required mode(s).

9.One to six hours may be required to see the desired temperature/humidity level in the conditioned space. Once room conditions have been programmed or set, a repeat visit to the conditioned site may be required to ensure the air conditioner is meeting the room's requirements.

Saving and Restoring Setpoint Parameters

Upon initial startup, the A/C system operates using the setpoints programmed by the factory (primary setpoints) as the operating setpoints. As described in Section 4.3.1, the user may enter new operating parameters in the Control menu anytime and the system will then operate accordingly. The user may store the new setpoints in the Service menu if it is intended to save them. Once stored, the user setpoints now become the operating setpoints. The primary setpoints entered by the factory still remain stored in the controller’s memory as the factory setpoints.

At any time, setpoints for the system may be re-adjusted to any value and the system will operate accordingly. If necessary, the customer may enter the Service menu and restore the setpoints to the stored user operating setpoint values. The original Factory (primary) setpoint values may also be restored from the Service menu. Whichever setpoints are restored (Factory or User) become the current operating setpoints.

4.3.2 Alarms

As programmed into the system controller, an alarm condition activates the summary alarm logic, which illuminates the alarm key and energizes an audible alarm. Some alarms are programmed by the factory to automatically shut down the A/C unit until the alarm condition is remedied and the alarm is cleared by pressing the alarm key. Some of the alarms that may be enabled by the factory are listed in Section 4.5.3.

4.3.2.1 Summary Alarm

A summary alarm will activate when the controller senses any programmed alarm condition. This illuminates the alarm key and if the option is selected, a N.O./N.C. summary alarm contact may be energized for remote monitoring of alarm conditions. If certain critical summary alarm conditions are detected, they will cause the A/C unit to shut down.

4.3.2.2 Customer Alarms

A customer-provided digital (on/off switching) alarm sensor may be connected to terminals provided in the electric box. This alarm input may be for any site-specific alarm condition the user wishes to monitor that may or may not be provided in the standard controller alarms menu; that is, Gas Detection, Intrusion Alarm, etc. Upon detection of a customer alarm, the controller will activate the summary alarm contact and display a screen message indicating a customer alarm message. The screen message “Customer Alarm 1” (default) will appear in the controller display, or the user may reconfigure the controller to display any alphanumeric message desired, up to 20 characters long, in the Service>Options>Custom menu loop (see Section 4.5.5.5.).

4.3.2.3 Custom Alarms

A custom (user configured) alarm is activated upon detection of one or more programmed alarm conditions as set by the operator in the Service>Options>Custom menu loop (see Section 4.5.5.5). When a custom alarm condition is detected, a summary alarm is signaled and a designated set of N.O. & N.C. Custom Alarm relay contacts may be energized to provide remote indication of the specific alarm condition(s).

For example, you may want to be notified when a change filter alarm is annunciated, notifying that the air filters need to be cleaned or replaced. That way, you are alerted before the filters are so badly clogged that airflow is reduced to a point where a “Loss of airflow” alarm is activated.

4.4 Controller Operation

The E2 Series controller is designed to control an air-conditioning system in a space or process application to temperature and humidity levels as defined by the user. Conditioned air is supplied to the space as needed to maintain the temperature/humidity control setpoints.

The controller I/O module includes inputs and outputs as depicted in Figure 4-18. Not all the inputs and outputs shown below are used; therefore, only the inputs/outputs needed for the specific A/C system type and application are enabled.

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Black Box CRDX-A-FS-12KW Saving and Restoring Setpoint Parameters, Summary Alarm, Customer Alarms, Custom Alarms
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CRDX-W-FS-12KW, Black Box Cold Row DX, CRDX-W-FS-24KW, CRDX-A-FS-24KW, CRDX-A-FS-12KW specifications

The Black Box CRDX series consists of high-performance cooling solutions designed to maintain optimal temperature conditions in data centers and server rooms. Key models in this series include the CRDX-W-FS-12KW, CRDX-W-FS-24KW, CRDX-G-FS-12KW, and CRDX-A-FS-24KW. These units are engineered to provide efficient cooling while addressing the rising demands of modern IT infrastructure.

One of the standout features of the CRDX series is its cold row design. This configuration enables targeted cooling delivery directly to the equipment, enhancing efficiency and reducing energy consumption. The airflow management in these models ensures that cooled air is directed where it is needed most, minimizing hotspots and maximizing cooling performance.

Both the CRDX-W-FS-12KW and CRDX-W-FS-24KW models utilize advanced refrigerant-based cooling technology. These units are equipped with electronically commutated (EC) fans, which are highly efficient and quieter than traditional fan technologies. This innovation not only lowers operational costs but also creates a more comfortable environment within the data center.

The CRDX-G-FS-12KW model stands out for its hybrid capabilities, offering both chilled water and direct expansion cooling options. This versatility allows facility managers to choose the best cooling approach based on their specific requirements and current infrastructure. The hybrid system can optimize energy consumption and enhance cooling efficiency, contributing to lower operating costs.

Another noteworthy feature across these models is their intelligent controls and monitoring capabilities. Equipped with sophisticated sensors and control systems, operators can gain real-time insights into temperature fluctuations, humidity levels, and unit performance. This data aids in proactive maintenance and ensures that cooling systems are operating at peak efficiency.

The CRDX-A-FS-24KW, on the other hand, is designed with a focus on adaptability and scalability. This model can be integrated easily into existing network setups, making it an excellent choice for facilities that anticipate future growth or need to adapt to changing cooling demands.

Overall, the Black Box CRDX series exemplifies the latest advancements in cooling technology, offering innovative features designed to support high-density computing environments. With their efficient cooling capabilities, intelligent controls, and flexible design options, these models provide reliable solutions for data centers looking to enhance their cooling systems while reducing operating costs.
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