Chapter 2: Installation

CAUTION

POE oil is used in systems with R410A refrigerant. POE oil quickly absorbs moisture when exposed to air. High POE oil moisture levels react with refrigerant to form acid, which results in system contamination. Keep the entire system sealed as much as possible and minimize exposure of POE oil to outside air. R410A operates at high pressures, which must be considered when checking the operating temperatures/pressures while charging or troubleshooting the system. Tables are provided in Section 2.10.3 showing the temperature/pressure characteristics for R410A.

2.10.2.1 Estimating Refrigerant Charge

When charging a system with R410A refrigerant, you must weigh the refrigerant and confirm the charge is correct by checking the superheat and subcooling temperatures (see Section 2.10.2.3).

You can estimate the amount of refrigerant needed by adding the amount of refrigerant required for the A/C unit (Table 2-8) plus the condenser (Table 2-9) plus the interconnecting refrigerant piping between the A/C unit and the condenser (Table 2-10). The values in the tables are the estimated weights for the refrigerant circuit. Table 2-9 shows the estimated charge weights for Black Box condensers. Depending upon site-specific conditions, refrigerant may need to be added or removed when fine tuning the charge to obtain the correct superheat and subcooling temperatures.

Table 2-8. Estimated refrigerant charge weight for A/C unit.

A/C Unit Model Number

Approximate R410A Charge

 

 

CRDX-A-FS-12KW

3.9 lb.

 

 

CRDX-A-FS-24KW

5.2 lb.

 

 

Table 2-9. Estimated refrigerant charge weight for condensers.

Condenser Model # R410A Charge (less receiver)

R410A Charge (with receiver)

 

 

 

BB-060-SEC,

2.8 lb.

12.2 lb.

BB-060-SSA

 

 

 

 

 

BB-096-SEC,

3.6 lb.

15.7 lb.

BB-096-SSA

 

 

 

 

 

BB-120-SEC,

5.4 lb.

23.6 lb.

BB-120-SSA

 

 

 

 

 

BB-192-SEC,

8.2 lb.

35.9 lb.

BB-192-SSA

 

 

 

 

 

724-746-5500 blackbox.com

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Black Box CRDX-G-FS-24KW, CRDX-W-FS-12KW Estimating Refrigerant Charge, Estimated refrigerant charge weight for condensers
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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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