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Precision Cooling
For Business-Critical Continuity™
™
Liebert XDK Rack Enclosure With Integrated Water-Based Cooling
User Manual–17kW
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IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS Liebert engineers will provide comprehensive support on how to install the XDK. Extensive material, function and quality checks ensure that you fully benefit from product functions and a long service life. Nevertheless, this product can produce hazards if it is used incorrectly by untrained personnel or is not used for the correct purpose. Read these operating instructions carefully before commissioning the XDK. The electrical equipment com
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TABLE OF CONTENTS IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INSIDE FRONT COVER 1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 2.0 OPERATING CONDITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 2.1 Proper Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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FIGURES Figure 1 Cooling airflow, top view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Figure 2 Cooling airflow, side view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Figure 3 XDK door and automatic opening mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Figure 4 Door locking mechanisms, opening switch .
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Introduction 1.0 INTRODUCTION The Liebert XDK provides the dissipation of heat loads up to 17kW. The server rack is closed to the installation area, that means no heat load will dissipate to the envi- ronment. (see also chapter 2.) The cooling is provided by a closed cooling system via an air-to-water heat exchanger. The cooling capacity adapts to the heat load. 19" (483mm) rails are designed for components as well as rails and shelves. Cable entry is possible from the bottom and from the top.
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Operating Conditions 2.0 OPERATING CONDITIONS 2.1 Proper Application The XDK is a water-cooled enclosure and is intended for removing heat from electronic equipment inside the cabinet. The cooling system in the cabinet is thermally independent of the room air. Water is used to cool equipment installed in the XDK. No additional cooling of the server room is required. NOTE Under certain conditions, a small amount of heat, (approximately 0.5kW), can escape into the room. CAUTION ! Risk of improp
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Description 3.0 DESCRIPTION 3.1 General function The modular design facilitates the installation of 19-inch-wide equipment of varying depth. Heat produced by equipment in the cabinet, such as servers, is removed by the cold water system integrated into the server cabinet. The cooling system is isolated from the server area, protecting the sensitive equipment from water damage. The cooling system comprises a high-performance air/water heat exchanger, fans with fan control unit, fan-speed accor
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Description 3.2 Principle of Cooling Operation Figure 2 Cooling airflow, side view Fan Bank Rear Front of of 19" Equipment XDK XDK Air / Water Heat Exchanger Cold Water Supply Side of XDK Air that has been heated by the servers to 95°F (35°C), for example, is circulated to a specially designed air/water heat exchanger by high-performance fans. The heated air is cooled to 68-77°F (20-25°C) and fed to the front of the server. The server fans can draw in the air and feed it over internal compo
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Description Table 2 Technical data Housing material Aluminium sheet, sheet steel, galvanized and coated Operating Temperature range 50°F to 95°F (10°C to 35°C) Abs. atmospheric humidity 8g / kg maximum Temperature difference across server approx. 15K Noise level 55 dB(A) sound pressure at a distance of 3 ft. (1m) Useful load 2204 lb (1000kg) Cold Water Cooling capacity 17kW Supply temperature 54°F (12°C) (other temperatures upon consultation) Return temperature 64°F to 72°F (18°C to 22°C) (oth
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Description 3.3 Control The server cabinet temperature is controlled by the fan control board A temperature sensor continuously measures the temperature of the server cabinet (server feed air). The air circulation flow rate is controlled by the fan speed according to the current thermal load. At temperatures lower than 70°F (21°C) fans rotate at 75% of maximum speed. Between 68°F and 73°F (20 and 23°C), speed increases proportionally to the temperature up to 96% of maximum speed. The failur
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Description 3.4.1 Function Front and rear door are kept closed with two electromagnets. The door will be pushed open smoothly by a gas pressure spring if power to the electromagnets fails. If the doors are opened, the thermal load can escape into the room, preventing the servers from over- heating. The inflow of air with water droplets can also be prevented (Door opening due to humidity alarm). When the rear door is opened, the fans shut down automatically. Figure 4 Door locking mechanisms, op
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Description 3.4.3 Manual Closing 1. Press LED switch for electromagnet activation 2. The LED lights up 3. Push door evenly shut. Both magnetic locks must latch. 3.4.4 Manual Opening 1. Press LED switch - green LED doesn’t light 2. Rack door opens itself 8
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Equipment Inspection, Handling And Storage 4.0 EQUIPMENT INSPECTION, HANDLING AND STORAGE Upon arrival of the unit, and before unpacking, verify that the labeled equipment matches the bill of lading. Inspect all items for damage, either visible or concealed. Damage should be immediately reported to the carrier and a damage claim filed with a copy sent to your local sales representative. 4.1 Packaging Material All material used to package this unit is recyclable. Please save for future use or
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Equipment Inspection, Handling And Storage 4.3 Storage • If the XDK’s packaging has been removed, cover it with tarpaulins to protect against particulates, such as sand and dust, and from moisture. • Keep storage temperature between -22°F and 104°F (-30°C and +40°C). • The heat exchanger must be completely drained to prevent the risk of freezing damage. • When stored for more than 12 months, turn fans by hand to check the fan bearings prior to instal- lation. 4.4 Returning the Unit in Case of D
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Installation and Commissioning 5.0 INSTALLATION AND COMMISSIONING 5.1 Preparation for Installation CAUTION ! Risk of improper installation. Can cause equipment damage. Before installing the unit, a number of points must be checked for safety and to ensure the correct function of the server cabinet. Take care when performing these checks to ensure that the unit functions correctly. CAUTION ! Risk of improper installation. Can cause equipment damage. The XDK must be installed on a level surface
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Installation and Commissioning 5.3 Water Connection The heat exchanger can be pulled out for servicing Water pipes should be connected so that the heat exchanger can be pulled out when the connection is undone. If the heat exchanger is connected to the water circuit using threaded fittings, the pipe fitting must be supported on tightening. Before commissioning the server cabinet, the pipe connections should be checked for leaks according to local codes. 5.3.1 Preparing Heat Exchanger for Ini
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Installation and Commissioning Figure 8 Heat exchanger 27-3/8" (695mm) 33-7/16" (850mm) Space for Cabling 9-7/8" (150mm) 2" (50mm) 2" (50mm) Top View Figure 9 Heat exchanger connection Water return Water supply Liebert recommends insulating the cold water pipes with waterproof insulation to prevent condensa- tion and losses. 13
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Installation and Commissioning Figure 10 Bottom plate with cutouts Sealed Cable Cutout Rear Network Cable Entry Cutout for Water Pipes Condensed Water Cutouts Front Cable and pipe openings must be sealed air-tight on completion of work. 5.4 Condensed Water Connection If the XDK is operated below dew point, condensed water may occur. As standard there is a water con- nection, 5/8" diameter, in the condensed water tray for drainage. Preparations for Connecting Step 1): Remove the air duct Co
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Installation and Commissioning The condensate drain is not pressurized; a condensate pump can be used. 5.5 Electrical Connection The wiring diagram is enclosed in the unit. WARNING ! Risk of electric shock. Can cause injury or death. Disconnect all local and remote electric power supplies before working within. Prior to beginning installation, shut down the server cabinet, disconnect it and secure it against unauthorized startup. As soon as all preparations for installation have been made, you
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Servicing and Maintenance 6.0 SERVICING AND MAINTENANCE WARNING ! Risk of high speed rotating fan blades. Can cause serious injury. Disconnect all local and remote electric powers supplies and assure that fan blades have stopped rotating before working within the unit. WARNING ! Risk of electric shock. Can cause injury or death. Disconnect all local and remote electric power supplies before working within the unit. CAUTION ! Risk of explosive discharge of water under pressure. Can cause injury
