Chapter 3: Startup/Commissioning

3. Startup/Commissioning

3.1 Initial Operation

For new installations, make sure the unit is ready to operate by going through the Checklist for Completed Installation, located in Appendix A, before startup.

NOTE: A Warranty Registration and Startup Checklist is provided in the unit data package. Complete it during startup and send it to Black Box Technical Support. This checklist should be used as a guideline for items that need to be confirmed during startup.

Startup must be performed by a journeyman refrigeration mechanic or an air-conditioning technician.

3.2 Step-by-Step Startup Instructions

1.Replace all equipment removed before performing the startup checks.

2.Turn the system on with the service disconnect switch. Upon applying power to the controller, it begins an initialization sequence, conducting internal diagnostics to confirm functionality (see Section 4.3).

3.After about 30 seconds the Main screen is displayed (see Figure 3-1). At the bottom of the screen a status message “Unit On” appears.

Figure 3-1. Main display screen.

NOTE: You may turn the A/C unit on and off at any time by pressing and holding the Enter key for 3 seconds.

4.After “Unit On” appears, the fans begin operating in 5-second, time-delayed stages (adjustable). The middle fan is turned on first, then the upper fan, then the lower fan. The Black Box logo in the display is replaced with a blower symbol.

5.A 45-second time delay is allowed after the first fan turns on before the controller polls the air proving switch. If adequate airflow is detected, the controller enables its outputs. If the actual room conditions are not within the range of the programmed setpoints, the system will begin operating in the mode(s) needed (cooling, dehumidifying) to reach the setpoints. Symbols appear in the display to indicate the active operating modes (see Section 4.3).

6.Temperature and humidity alarms are masked out for 30 minutes to allow for conditions to stabilize without triggering nuisance alarms.

7.Ensure that all fans are rotating correctly and freely without any unusual noise.

8.Test cooling operation by decreasing the temperature setpoint (see Section 4.5.4.1) to create a demand for cooling. The compressor will turn on and the supply air should feel cooler than the return air.

In all cases, 1 to 6 hours might be required to see the desired temperature and humidity level in the conditioned space. Once room conditions have been programmed or set, a repeat visit to the conditioned space may be required to ensure the system is meeting the room’s requirements.

3.3 Microprocessor Controller Programming

The E2 microprocessor controller is factory programmed based on the features selected with the system. A user provided Building Management System (BMS) may be used to directly interface to the E2 controller. The operator may view all the available menu screens through a BMS, however, changes may be made only to basic parameters such as adjusting setpoints and setting and acknowledging alarms. More advanced parameter adjustments may be made through the user interface display (see Figure 4-1). Operating instructions for the E2 controller are provided in Chapter 4.

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Black Box CRDX-A-FS-24KW, CRDX-W-FS-12KW Startup/Commissioning Initial Operation, Step-by-Step Startup Instructions
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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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