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Precision Cooling
For Business-Critical Continuity™
® ™
Liebert Xtreme Density
System Design Manual
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TABLE OF CONTENTS 1.0 SYSTEM DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1.1 European Union Fluorinated Greenhouse Gas Requirements . . . . . . . . . . . . . . . . . . . . . . . . 2 1.2 Direct and Indirect System Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 Liebert XDO—Overhead Cooling Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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3.20 Display Panel and Remote Temperature/Humidity Sensor Locations . . . . . . . . . . . . . . . . . 29 4.0 LIEBERT XD COOLING MODULES—LIEBERT XDO, LIEBERT XDV, LIEBERT XDH AND LIEBERT XDCF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30 4.1 Liebert XDO Standard Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 4.1.1 Optional Features Liebert XDO. . . . . . . . . . . . . . . . . . . . . .
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Figure 24 Hydraulic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Figure 25 Bypass flow controller details, dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Figure 26 Bypass flow controller arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Figure 27 Bypass flow controller piping . . . . . . . . .
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TABLES Table 1 Liebert XD field-installed port kits header connection size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 2 Maximum and minimum modules supported by a Liebert XDP or Liebert XDC . . . . . . . . . . . . . 14 Table 3 Calculating quantity and spacing of Liebert XDO modules (example below is Liebert XDO20) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Table 4 Deter
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System Description 1.0 SYSTEM DESCRIPTION The Liebert XD™ family of cooling units delivers efficient, sensible cooling to high-heat environ- ments. Liebert XD systems are designed to cool computer racks and hot zones in a data center or com- puter room without taking up expensive floor space for cooling components. The Liebert XD family includes: • Liebert XDC—Liebert XD Chiller; cools and pumps refrigerant to cooling modules • Liebert XDP—Liebert XD Pumping unit; pumps refrigerant to cooling mo
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System Description 1.1 European Union Fluorinated Greenhouse Gas Requirements Stationary air conditioning, refrigeration, heat pump equipments and stationary fire protection sys- tems in the European Community market and operating with fluorinated greenhouse gases (f-gas), such as R407C, R134a, R410A, must comply with the F-Gas Regulation: (EC) No. 842/2006 (F-gas). The regulation prohibits, among other actions, venting fluorinated greenhouse gases to the atmo- sphere. The F-Gas Regulation req
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System Description 1.3 Liebert XDO—Overhead Cooling Module The Liebert XDO ceiling-mounted cooling module draws in hot air rising from densely populated cab- inets, passes it over the Liebert XDO’s coils and exhausts cooled air downward into the cold aisle. The unit is available with optional, flexible metal pipes with quick-connect couplings at each end for easy connection to the refrigerant distribution pipes. Figure 4 Suspended Liebert XDO modules in hot aisle-cold aisle arrangement Cold Ai
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System Description 1.4 Liebert XDV—Vertical, Above-Cabinet Cooling Module The Liebert XDV is installed on top of or above a rack enclosure. It is available with optional flexible metal pipes with automatic shutoff with quick-connect couplings at the ends for easy connection to the refrigerant distribution pipes. The Liebert XDV may be set up in either of two ways: • The Liebert XDV can take hot air directly from an equipment enclosure, cool the air and dis- charge it downward into the cold ais
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System Description 1.5 Liebert XDH—Horizontal Cooling Module The Liebert XDH cooling module is designed to be placed within a row of server enclosures in a hot aisle-cold aisle arrangement. The Liebert XDH has dual refrigeration circuits and is available in a half-rack-width unit. The Liebert XDH is intended for use with a Liebert XD pumped refrigerant cool- ing system, supplied by either a Liebert XDP or Liebert XDC. The Liebert XDH is available with optional, flexible metal pipes with quick-
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System Description 1.6 Liebert XDCF The Liebert XDCF is a self-contained module designed to cool Egenera’s BladeFrame EX cabinets and equipment without exhausting heat into the room. Two modules (top and bottom) may be mounted on the rear of a BladeFrame cabinet. CF modules consist of a sheet-metal frame, coil and filter dryer. It has no moving parts and needs no electricity. The unit is available with optional, flexible metal pipes with quick-connect couplings at each end for easy connectio
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System Description 1.7 Liebert XDA—Air Flow Enhancer The Liebert XDA is a fan unit that boosts the airflow through densely populated enclosures, removing hot spots from within the racks. One or two units can be mounted on the rear of most rack enclosures. Figure 9 Liebert XDA—air flow enhancer—on Liebert Foundation enclosure 7
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System Description 1.8 Liebert XDP—Pumping Unit The Liebert XDP isolates the building’s chilled water circuit from the pumped refrigerant circuit. The Liebert XDP circulates refrigerant to Liebert XDCF, Liebert XDH, Liebert XDO or Liebert XDV mod- ules while preventing condensation by maintaining the refrigerant’s temperature above the dew point. The Liebert XDP employs two sets (for redundancy) of remote sensors to determine the temper- ature and humidity in the air and instantly adjusts refr
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System Description 1.9 Liebert XDC—Refrigerant Chiller The Liebert XDC is an indoor chiller that connects directly to the Liebert XD cooling modules and pro- vides refrigerant circulation and control. The Liebert XDC keeps the refrigerant temperature above the dew point and eliminates the need for a separate pumping unit in the direct system configuration. The Liebert XDC employs two sets (for redundancy) of remote sensors to determine the temperature and humidity in the air and instantly adj
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System Description 1.10 Liebert XD Piping Liebert XD Piping is prefabricated distribution piping that is installed in anticipation of a growing sys- tem. Liebert XD cooling modules are added as required and are quickly made operational with flexible connection piping with threaded couplings. This unique system allows the room cooling capacity to increase to more than 30kW per rack with no additional disruptive piping installation. The flexible connection piping also allows the cooling modules
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Starting a New Equipment Cooling Project 2.0 STARTING A NEW EQUIPMENT COOLING PROJECT 2.1 Determining Cooling Equipment Needs 1. Is adequate space available for a Liebert XD installation? 2. Is the hot aisle/cold aisle approach being utilized for this room design or can it be utilized in this room design? 3. Is redundant cooling equipment required? 4. Are there access considerations for all components (possible rigging problems) 5. What heat load growth is anticipated over the next few years? 6
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Starting a New Equipment Cooling Project 2.2 Implementing a Hot-Aisle/Cold Aisle Design A best practice is to use rows of equipment racks in an alternating arrangement of cold aisles and hot aisles. This is best accomplished when the layout of the file-server farm area is first being planned, and it is exceedingly more difficult to accomplish when the computer room is already populated with operating hardware. In the cold aisle, the equipment racks are arranged face to face so the cooling air
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Designing a Liebert XD Solution 3.0 DESIGNING A LIEBERT XD SOLUTION Liebert XD systems are intended for use with precision air conditioning equipment, such as the Lie- bert Deluxe System/3 and Liebert DS. The precision air conditioning equipment is required to control the room’s humidity and to filter the air. The Liebert XD systems provide efficient, highly effective heat removal (sensible cooling only), and provide no dehumidification. The Liebert XD control system maintains the refrigerant
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Designing a Liebert XD Solution 3.3 Selecting Liebert XD Cooling Modules The next step is to select the Liebert XD cooling modules to be configured into the solution. Liebert XD modules that use pumped refrigerant can be connected to the same Liebert XDP/Liebert XDC pip- ing circuit. This includes the Liebert XDCF, Liebert XDH, Liebert XDO and Liebert XDV. Generally, the Liebert XDO is selected for use in new installations or renovations where the unit can be installed on the ceiling or in the
