The requested URL /index.php?read=58&magid=22&onmag=true was not found on this server.That is why Businesses, like yours, need dedicated partners they can trust to take care of their mission-critical infrastructure in data centers. Downtime is not an option. So when it comes to hiring a service contractor to service and maintain computer room air conditioning (CRAC) units, businesses need to hire factory trained and certified technicians to not only maximize reliability, but also ensure product factory warranties are retained. At 74%, Emerson/Liebert has the greatest market share of computer room air conditioning (CRAC) units. Are Liebert or Emerson cooling products used in your company’s computer rooms? If so, Crockett Facilities Services has expertise in servicing and commissioning Liebert and Emerson CRAC units. We are committed to investing in training for our service technicians. As part of this, our technicians attend factory-training classes, such as two recently completed certification courses at the Emerson Network Power Learning Center in Ohio – the Xtreme Density Cooling Products and Advanced – Graphics and Small Systems Controls classes.

These intense training sessions, consisting of presentations and hands-on lab sessions with simulated diagnostic and repair problem solving, are essential to becoming a factory trained technician (FTT). These courses are essential to being able to quickly diagnose and solve even the most challenging and uncommon problems. In general, the courses covered the following. – Liebert XD high heat-density cooling products, including pumped refrigerant-based products and water-based products, XDIO smart card functionality, CANBus node ID. – Installation, start-up, maintenance and operations – Liebert XD configurations and design – Deluxe System 3 and Challenger 3000 with AM/AG controls, MiniMate2 and DataMate products – Operation and maintenance of the Deluxe Systems – Program, wire, diagnose and troubleshoot Advanced Microprocessors – Installation, start-up and maintenance of the small systems – Program, wire, diagnose and troubleshoot the MiniMate2

To maintain Liebert FTT status service technicians must attend and pass similar courses every three years. In addition to providing preventive maintenance services for CRAC units for many customers, including the Department of Defense, NASA, US Coast Guard, Beltsville Information Management Center, and FBI, Crockett Facilities Services also performs international commissioning for Liebert and Emerson units both in the US and abroad, with start-up and commissioning work done in over six countries. Our combination of factory-training and years of experience in servicing our customers’ data center needs brings tangible results and benefits to our customers. – Maximize reliability and reduce downtime – Lower power demand – Reduce energy consumption – Protect IT equipment investment With IT systems constantly changing, it is essential to have a well thought-out preventive maintenance and continuous precision cooling plan. By understanding the latest technologies and trouble-shooting techniques, Crockett Facilities Services has the engineering expertise and qualifications to set up, maintain and optimize systems, controls and cooling in your mission-critical data centers.

We’re in this Building Together! Like us on Facebook; follow us on LinkedIn, Twitter, and Google+ Tags: data center maintenance Maryland, data centers, Liebert Factory-Trained Technicians, MSCA GreenSTAR certified technicians This entry was posted onac unit popping noise Wednesday, February 13th, 2013 atlg window ac unit 8000 btu 4:40 pm and is filed underauto body shops in mcallen tx Blog, Crockett Facilities, Crockett Facilities Services Business Award Recognition, Facilities Maintenance . You can follow any responses to this entry through the You can leave a response, or trackback from your own site.In the spring 2005, a graduate student from UEP evaluated the energy consumption of data and telecom centers and closets at Tufts University Medford Campus.

A literature review was conducted in order to understand the engineering principles regarding the cooling of electronic equipment and data centers. Major increases in efficiency are possible through evaluating and minimizing ventilation rates. Evaporative cooling in dry climates where data centers need humidification will also increase cooling efficiency. Glycol cooling has a very significant advantage over other methods. In cold locations, the glycol within the fluid cooler can be cooled so much (below 50°F) that it can bypass the heat exchanger in the AC unit and flow directly to a specially installed “economizer coil”. If the outside air is cold enough, the refrigeration cycle is turned off and the air that flows through the economizer coil, filled with flowing glycol, cools the IT environment. This process is called “free cooling” and provides excellent operating cost reductions when used. “Recirculation” (mixing of hot and cold air) results in a decrease in overall efficiency and cooling costs that are 10-25% higher.

In order to prevent the mixing of hot and cold air in the data center, data racks should be aligned in rows where they have their fronts facing each other, with an empty aisle in between. The implementation of the ‘hot aisle – cold aisle principle’ can reduce costs by almost 20 percent. In addition, all unused space in the front of a rack should be covered with blanking panels to prevent mixing. The following are the environmental requirements and a list of installed A/C equipment at the larges Data Center at the Tufts Medford Campus: • Temperature range: 68-72 oF • Relative Humidity: 40-55%. • Cooling Requirement: 52 tons (626,484 BTU/h, 183.6 kW) • The glycol-cooled Liebert unit has a total cooling capacity of 265051.2 BTUs per hour(22 tons). • There are two identical glycol-cooled Stulz Units (Model MRD522G), each with a total cooling capacity of 183,800 BTUs per hour. • ‘Hot aisle – Cold aisle’ principle is starting to be implemented. • The Telecommunications Department is considering an expansion of the AC System by 5 tons in late summer or early fall, 2005.

The annual CO2 emissions and costs resulting from A/C usage in the TAB Data Center: The study also looked at possible ways of reducing the carbon emissions resulting from the operation of A/C systems used in Data Closets. The focus of the study was the data closet in the Ginn Library. This data closet utilizes a small, ductless, split / AC unit although the library has a central HVAC system in place. The closet has a cooling requirement of 2 kW which translates to 1 ton of CO2 emissions annually resulting from AC usage. The following recommendations were made as a result of the study, regarding possible reductions in carbon emissions. The replacement of the AC unit with a fan would allow the Data Closets to utilize the cooling provided by the central HVAC system. This would also enable savings to be made from heating costs during winter. Estimated Reduction in Annual CO2 Emissions: 0.5 tons per data closet. Estimated Reduction in Annual Operating Cost: $440 per data closet.

Implementation of the ‘Hot Aisle – Cold Aisle Principle’: The full implementation of the ‘hot aisle – cold aisle’ principle would reduce operating costs and the resulting carbon emissions by 20 percent. Estimated Reduction in Annual CO2 Emissions: 13.2 tons Estimated Reduction in Annual Operating Cost: $2470 Installing glycol-cooled AC systems is one of the most cost effective carbon reduction options. The Computer Services and Facilities Departments should choose to install glycol-cooled AC units whenever an expansion is needed. Compared to other conventional options the glycol-cooled units can provide the following reductions: Estimated Reduction in Annual CO2 Emissions: 0.6 tons per ton of cooling added Estimated Reduction in Annual Operating Cost: $114.6 per ton of cooling added Electricity consumption by the AC units in the Data Center should be observed and documented. Currently, there are no meters installed to show consumption by each individual unit, or the total consumption by the AC units.