Password Protection, Timer Feature, Alarms

Chapter 8: Product Guide Specifications

PASSWORD PROTECTION

Access to the Info Menu, Alarms Log, and the ability to monitor room conditions must be allowed without the use of a password. Modifications to the control setpoints require the use of a password. The controller shall be programmed to recognize predetermined security levels before allowing access to display screens containing critical variables. Three secured menu levels (Control, Service, and Factory) will support unique passwords that must be entered to access the menu screens so only authorized personnel may perform modifications to the settings.

RESTORABLE PARAMETERS/FACTORY DEFAULTS

Upon initial startup, the Cold Row CW system must operate using the setpoints programmed by the factory. The customer may enter new operating parameters in the Control menu and the system will then operate accordingly. The new setpoints may be stored as “Customer Default Setpoints.” The primary setpoints entered by the factory still remain stored in the controller's memory as “Factory Setpoints.” The setpoints for the system may be readjusted in the Control menu at any time. If necessary, the customer may restore the setpoints back to the Customer Default setpoint values or to the original factory (primary) setpoint values.

TIMER FEATURE

The timer must allow the user to set up an operating schedule to automatically scale back or shut down the air conditioner during low demand or unoccupied periods. This is an energy-saving feature offering the user the ability to create an operating schedule tailored to the needs of the building. An evening (night-setback) schedule may also be created, allowing the Cold Row unit to operate at night with relaxed temperature/humidity setpoints and offsets.

A/C GROUPING PRIVATE LAN (pLAN) OPERATION (OPTIONAL)

Multiple Cold Row CW system controllers must be able to connect (grouped) to a pLAN local network, allowing the communica- tion of data and information from each controller to a central control terminal or lead controller. The lead controller display screens monitor and adjust group control variables for the individual system controllers. Each E² controller connected to the pLAN network must be identified with its own unique address.

Multiple Cold Row CW units consisting of up to eight precision air conditioners equipped with like controllers may be controlled and monitored via the E² series controller. With multiple Cold Row CW units, each unit can selectively be configured as “Active” to operate as a primary A/C, “Capacity Assist” for staged operation, or as “Standby” to come on-line in case of a failed air conditioning unit to ensure continuous availability. The controller may also be configured to rotate units with timed duty cycling to promote equal run-time and ensure that each Cold Row CW unit within the rotating group is operationally exercised on a periodic timed basis.

BUILDING MANAGEMENT SYSTEM (BMS) INTERFACE (OPTIONAL)

The E² series controller incorporates a communication interface port that can be field connected through a serial interface to a BMS via Modbus, BACnet, SNMP, or HTTP as configured by the factory. A controller interfaced to a network must be configured for BMS communication.

ALARMS

Alarm conditions activate a red LED indicator that backlights the alarm function key. As an option, an alarm condition may also be enunciated by an audible alarm signal. An alarm is acknowledged by pressing the alarm key. This calls up alarm display screens that provide a text message detailing the alarm conditions. After an alarm condition is corrected, the alarm can be cleared by pressing the alarm key.

SMALL BEZEL DISPLAY PANEL

The small bezel user interface display panel features an easy-to-read, backlit liquid-crystal alphanumeric display equipped with contrast adjustment and LED illuminated function keys. The screens that appear on the user interface display panel present data that originates from the controller I/O module. The controller is operated via a 6-key menu-driven loop structure and offers an alarm log plus four different interface menu levels to the operator: Information, Control, Service, and Factory. These menus permit the user to easily view, control, and configure operating parameters for the Cold Row unit.

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cold row chilled water(CW) engineering manual, crcw24, crcw-12 specifications

The Black Box Cold Row Chilled Water (CW) Engineering Manual focuses on the CRCW-12 and CRCW-24 models, designed for precision cooling in data centers and critical environments. These systems play a vital role in ensuring optimal temperature management, thereby enhancing operational efficiency and equipment longevity.

One of the main features of the CRCW-12 and CRCW-24 units is their high cooling capacity. The CRCW-12 provides a cooling capacity of 12 tons, while the CRCW-24 doubles this capacity with 24 tons. This robust performance makes these units suitable for diverse applications, from small server rooms to large data centers.

Another key characteristic is their modular design, allowing for easy scalability. This flexibility enables users to expand their cooling capabilities as their infrastructure grows, making it an excellent long-term investment. The compact footprint of both models ensures they can fit into tight spaces without sacrificing performance.

In terms of energy efficiency, both CRCW models incorporate advanced technologies such as variable speed fans and compressors. These components adjust their speed according to real-time cooling demand, significantly reducing energy consumption. This smart technology not only lowers operational costs but also contributes to environmental sustainability.

The systems are equipped with state-of-the-art controls that facilitate precise temperature management. These controls enable remote monitoring and management through integrated software platforms, making it easier for facility managers to oversee cooling performance and make necessary adjustments.

Additionally, the CRCW series includes features like dual refrigerant circuits, which increase reliability by allowing the system to maintain operation even if one circuit fails. This redundancy is crucial for mission-critical environments where cooling cannot be compromised.

Noise reduction is another notable characteristic. Both models are designed with sound-dampening technology, making them suitable for environments where low noise levels are essential, such as offices adjacent to data centers.

The use of high-quality materials and components ensures durability and prolonged service life. Regular maintenance is simplified with easily accessible parts, allowing for efficient servicing and lower downtime.

In conclusion, the Black Box CRCW-12 and CRCW-24 cold row chilled water systems are engineered to meet the rigorous demands of modern data centers. Their combination of high cooling capacity, energy efficiency, modular design, and advanced control technologies makes them a preferred choice for reliable and effective temperature management.