Chapter 2: Installation

2.8 Split Air-Cooled Systems

Split air-cooled systems with a remote condenser will require field-installed refrigerant piping. All split systems are shipped with a dry nitrogen charge of 100 psig. Release the pressure via an available stem valve or Schrader valve prior to uncapping the pipes. Do not release the pressure until the field-installed refrigerant piping is ready to connect. Systems using a remote condenser will require a copper liquid line and discharge line. See Figure 2-10 and refer to the IOM documentation provided with the condenser.

OPTIONAL COMPONENTS FOR FLOODED HEAD PRESSURE CONTROL

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ELECTRONIC

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

THERMAL

 

 

 

 

 

PRESSURE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EXPANSION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VALVE

DISTRIBUTOR

 

 

 

 

RELIEF VALVE

 

 

 

 

 

 

 

 

 

SCHRADER

 

 

CHECK VALVE

(OPTIONAL)

REFRIGERANT

SIGHT

 

 

 

 

BODY

VALVE

 

 

 

 

 

 

 

 

 

 

FILTER/DRIER

GLASS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HEAD PRESSURE

 

CONTROL VALVE

RECEIVER

ASC

ELECTRONIC

HOT GAS

REGULATOR

CHECK VALVE

 

EVAPORATOR COIL

 

T

SCHRADER

TEMPERATURE

VALVE

SENSOR

INTERCONNECTING

SCHRADER

VALVE

FIELD PIPING BY OTHERS

 

HP

HIGH PRESSURE

LIMIT SWITCH

COMPRESSOR

 

LP

 

 

PT

 

LOW PRESSURE

PRESSURE

LIMIT SWITCH

TRANSDUCER

REMOTE AIR COOLED CONDENSER

Figure 2-10. Typical remote air-cooled DX piping diagram.

2.8.1 Refrigerant Piping

Refrigerant lines for the A/C unit are routed to either the top or bottom of the cabinet as specified when the Cold Row system is ordered (see Section 2.8.1.1). The connections are made inside the cabinet. The pipe stubs are labeled; i.e. “Discharge,” “Liquid Line.”

The refrigerant piping should be isolated by using vibration-isolating supports. Provide supports (clamps or hangers) as necessary every 5 to 10 feet along piping runs to minimize vibration and noise transmission. To reduce vibration transmission and prevent pipe damage when sealing openings in walls, use a soft flexible material to pack around the piping. After the piping is installed, seal the gaps between the pipes and the entrance holes in the cabinet so air won’t leak around the pipes.

All refrigeration piping should be installed with high-temperature brazed joints. Use standard refrigeration practices for piping, leak testing, dehydration, and charging of the refrigeration circuits. For copper-to-copper brazing, phosphorous alloy containing a minimum of 15% silver is recommended. General-purpose silver brazing alloy with 45% silver is recommended for brazing dissimilar metals.

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Black Box CRDX-A-FS-24KW, CRDX-W-FS-12KW, CRDX-G-FS-24KW, CRDX-W-FS-24KW Split Air-Cooled Systems, Refrigerant Piping

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.