Precision Cooling For Business-Critical Continuity™ Liebert® XDH™ User Manual - 50 & 60Hz
GENERAL SAFETY GUIDELINES ! WARNING Risk of top-heavy unit falling over. Can cause death or injury. Improper handling can cause equipment damage, injury, or death. Read all of the following instructions before attempting to move, lift, remove packaging from the unit, or preparing unit for installation. ! WARNING Risk of explosive discharge. Can cause death or injury. This unit contains fluids and/or gases under high pressure.
TABLE OF CONTENTS GENERAL SAFETY GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INSIDE FRONT COVER 1.0 LIEBERT XDH COMPONENT LOCATIONS AND MODEL NUMBER NOMENCLATURE . . . . . . . . .1 2.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 2.1 Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 2.
7.0 INSTALLATION CHECKLIST AND SYSTEM FILL FOR STARTUP . . . . . . . . . . . . . . . . . . . . . . . 25 7.1 Checklist for Proper Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 7.2 Charging with Refrigerant and Starting the Liebert XD System . . . . . . . . . . . . . . . . . . . . . 25 8.0 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26 8.
Liebert XDH Component Locations and Model Number Nomenclature 1.
Introduction 2.0 INTRODUCTION 2.1 Product Description The Liebert XDH cooling module is designed to be placed within a row of server enclosures in a hotaisle-cold-aisle arrangement. The Liebert XDH, available in a half-rack-width unit, is intended for use with a Liebert XD pumped refrigerant cooling system, supplied by either a Liebert XDP or Liebert XDC. Warmer air from the enclosures is drawn in through the rear of the Liebert XDH, cooled and blown into the cold aisle in a diffuse pattern.
Introduction 2.5 Installation Considerations The Liebert XDH is designed for placement within a row of computer cabinets in the data center in a hot-aisle-cold-aisle arrangement. The Liebert XDH is 12" (305mm) wide, so it takes up little space. For installation arrangement, see 4.2 - Installing the Liebert XDH Within the Enclosure Row. Be sure to follow all applicable codes. Determine whether the Liebert XDH includes the condensate detection option (factory-installed).
General product information 3.0 GENERAL PRODUCT INFORMATION 3.1 Product/System Description The Liebert XDH is designed for placement within a row of computer cabinets in the data center in a hot-aisle-cold-aisle arrangement to maximize the Liebert XDH’s cooling: The unit takes in hot air through the rear from the hot aisle, cools the air by air-to-fluid heat exchangers and discharges the air through the front of the unit into the cold aisle.
General product information 3.3 Equipment Inspection Upon arrival of the unit, and before unpacking, verify that the labeled equipment matches the Bill of Lading. Inspect all items for visible and concealed damage. Damage should be immediately reported to the carrier and a damage claim filed with a copy sent to Liebert Corporation or to your sales representative. 3.3.1 Recyclable Packaging All material used to package this unit is recyclable.
General product information 3.3.2 Unit Handling If possible, transport the unit using a forklift or pallet jack. • If using a forklift or pallet jack, ensure that the fork tine length is suitable to safely move the packaged unit. • Liebert recommends keeping the unit in the protective packaging until it has been moved to the installation site. • When handling and unpacking the unit, exercise great care to prevent damage. • Do not lift the unit any higher than 6" (152mm) while moving it.
General product information 3.3.4 Taking the Unit off the Pallet ! 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Figure 6 WARNING Risk of unsecured unit rolling off pallet. Can cause equipment damage, injury or death. The Liebert XDH is on casters. Ensure that the unit/skid is located on a flat surface before loosening the hardware securing the Liebert XDH to its shipping pallet. The Liebert XDH ships with four outrigger-style wheels to permit rolling it into position for installation.
General product information Figure 7 Attaching ramp, removing the Liebert XDH from pallet Tie-Down Bracket (removed from pallet) Bracket installed, securing ramp to shipping pallet Lag screw - 1 of 6 8
Mechanical Considerations 4.0 MECHANICAL CONSIDERATIONS 4.1 Determining Placement in the Conditioned Space The Liebert XDH units should be placed among the cabinets that generate the greatest amount of heat. If heat loads are dispersed evenly throughout the room, the Liebert XDH modules may be spread out accordingly. The Liebert XDH is engineered to fit among computer enclosure cabinets. Figure 8, below, illustrates the unit’s dimensions.
Mechanical Considerations 4.2.1 Airflow Direction If the Liebert XDH is installed at the end of a row, Liebert recommends using uni-directional air diffusers. The uni-directional diffusers are designed to blow cooling air to the left; the diffusers can be used for right air discharge by removing them from the Liebert XDH, turning them 180 degrees, then reattaching them to the Liebert XDH. If the Liebert XDH is installed between racks, Liebert recommends using bi-directional air diffusers.
Mechanical Considerations Install Air Diffusers for Best Airflow Direction 1. Remove the top diffuser, Part # 186458, from its packaging. 2. Check the top diffuser’s fittings and insertion holes on the Liebert XDH to determine how the diffuser should be installed—the diffuser may be attached only one way on the top half of the Liebert XDH. 3. Rotate the diffuser 180 degrees and press it against the lower half of the Liebert XDH until it snaps into the fittings (see Figure 10).
Piping 5.0 PIPING 5.1 European Union Fluorinated Greenhouse Gas Requirements Stationary air conditioning, refrigeration, heat pump equipments and stationary fire protection systems 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 atmosphere.
Piping Figure 12 Typical Liebert XDH piping—non-interlaced connection Liebert XDH Unit 1 Liebert XDH Unit 2 Liebert XDH Unit 3 Liebert XDH Unit 4 Liebert XDP / Liebert XDC #1 Supply Liebert XDP/ Liebert XDC #1 Return Liebert XDP/ Liebert XDC #1 Supply Liebert XDP/ Liebert XDC #2 Return Liebert XDP/ Liebert XDC #2 Drawing is not to scale . Line sizes do NOT indicate piping sizes . Equipment racks not shown for clarity.
Piping Figure 14 Indirect system configuration—hydraulic system schematic Indirect XD System Configuration Liebert XDPs pump refrigerant to cooling modules, isolate the refrigerant circuit from the building’s chilled water supply with an internal heat exchanger and maintain refrigerant above the dew point.
Piping 5.3 Connection Methods and Points Refer to site specific drawings for general locations of the piping connections. For Liebert XDH connection locations, refer also to Figure 16. The assembly and connection means used for piping in the Liebert XD system are the same as those used in conventional refrigeration systems. Observe all standard practices during installation and startup to prevent damage and contamination.
Piping 5.4 Piping Considerations—Hard-Piped Connections Refrigerant enters and exits the Liebert XDH through connections on the top of the unit (see Figure 16). The supply piping for each refrigeration circuit is 1/2" OD copper pipe. The return piping for each circuit is 7/8" OD copper. Each Liebert XDH has two supply connections and two return connections, one for each refrigeration circuit.
Piping 5.4.2 Brazing Preparations After the holding charge has been vented, a torch can be used to remove the caps over the ends of the supply and return lines. The assembly and connection means used for piping in the Liebert XD system are similar to those used for conventional refrigeration systems. All piping should be installed with high-temperature brazed joints. Soft soldering is not recommended.
Piping Figure 17 Piping location and connecting sizes for pre-charged units 6" (153mm) 7/8" Return, Upper Refrigeration Circuit 3-5/8" (92mm) 1/2" Supply, Upper Refrigeration Circuit 1-3/8" (35mm) 2-1/8" (54mm) 4-1/8" (105mm) 5" (127mm) Rear of Liebert XDH 7/8" Return, Lower Refrigeration Circuit 5.7 1/2" Supply, Lower Refrigeration Circuit Field Installation of Liebert XD Flex Pipe Kit on the Liebert XDH Liebert XD Flex Pipe kits are available in lengths of 4, 6, 8 and 10 feet (1.2, 1.8,2.
Piping 5.8 Connecting Liebert XD Flex Pipes to Liebert XDH Modules ! 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 5.8.1 CAUTION Risk of high pressure refrigerant discharge. May cause injury and air pollution. Do not disconnect one-shot refrigerant connections after they have been connected. Disconnection will release pressurized R-134a refrigerant from the Liebert XDH. Remove the caps on the supply and return lines on the top of the Liebert XDH.
Piping Figure 19 Liebert XD prefabricated piping assembly Return Main Service Valve, typical (all ports) Supply Main Threaded Cap (Typical) 6. Thread the return couplers together. The return couplers are the larger of the couplers. 7. Use one of the adjustable wrenches to hold the fixed side of the female coupler on the Liebert XDH stationary. With the other adjustable wrench, tighten the collar onto the coupler. Tighten these only until the force required to tighten abruptly increases. See Figure 20.
Piping Figure 21 Liebert XD system with prefabricated piping assembly and Liebert XD Flex Pipe Return Service Valve Make sure valve is open after system leak check Supply Service Valve Make sure valve is open after system leak check Return Main Supply Main Return Liebert Flex Pipe Supply Liebert Flex Pipe 5.10 Disconnecting a Liebert XDH With Liebert XD Flex Pipe From a Liebert XD System ! CAUTION Risk of sudden discharge of pressurized refrigerant. Can cause equipment damage or injury.
Piping Figure 22 Profile view of the Liebert XD system Service Valve Return Line Supply Line 7. Place the protective dust cap and plug back onto both ends of the couplers on the Liebert XDH and the port pipe. Figure 23 Piping mains without Liebert XDH and Liebert XD Flex Pipe 8. Repeat Steps 5 through 7 for the return couplers (larger couplers). 9. Carefully lay the Liebert XD Flex Pipe aside. ! 5.11 CAUTION Risk of tubing kinks. Can cause permanent damage to the Liebert XD Flex Pipes.
Electrical 6.0 ELECTRICAL The unit must be installed in accordance with national wiring regulations. Refer to the unit’s serial tag for electrical requirements. Refer to Table 3 for details. ! 6.1 WARNING Risk of electric shock. Can cause death or injury. Disconnect both electric power cords before working within the unit. Connecting High Voltage Wiring The Liebert XDH requires single-phase power for normal operation.
Electrical 6.2 Connecting Low Voltage Wiring—Optional Low voltage connections to the Liebert XDH are available only on units with the optional condensate detection feature. The low voltage connections are on the left side of the cabinet, in the rear, near the power connections (see Figure 24). These dry contacts can to be connected to a monitoring unit, such as Liebert’s SiteScan®.
Installation Checklist and System Fill for Startup 7.0 INSTALLATION CHECKLIST AND SYSTEM FILL FOR STARTUP 7.1 Checklist for Proper Installation ___ 1. The Liebert XDH module is properly mounted. ___ 2. Power cords connected to electrical supply. ___ 3. For Liebert XDH units with coupler option: Flex piping connections to prefabricated header assembly are secure and according to specifications. ___ 4. For Liebert XDH units with coupler option: Check for holding charge of R-134a. ___ 5.
Operation 8.0 OPERATION The Liebert XDH’s controls are on the front of the unit at the Liebert XDH’s midline for easy access. Each switch controls the operation of one bank of three fans (see Figure 26). The separate switches permit the use of only one bank of fans at a time, reducing the airflow if the Liebert XDH’s full cooling capacity is not needed. NOTE At least one of the Liebert XDH’s banks of fans must be turned on before either the Liebert XDP or Liebert XDC is switched on.
Maintenance 9.0 MAINTENANCE Minimal maintenance is required to keep the Liebert XDH operating at optimal levels. The unit should be cleaned and checked for damage and worn parts. Suggested maintenance includes: • Cooling fins—Clean any dust and debris from the cooling fins, taking care not to bend them • Circulating fans—Clean any dust from the fans. 9.1 Internal Access ! WARNING Risk of electric shock. Can cause injury or death. System contains hazardous electrical voltage.
Maintenance 9.3 Remove Fan Tray ! WARNING Risk of electric shock. Can cause injury or death. System contains hazardous electrical voltage. Disconnect both power cords from the electrical supply outlets or from the receptacles on the back of the Liebert XDH before working within. • Turn off the two fan switches on the front of the Liebert XDH (see Figure 26). 1. Ensure that all electrical power to the Liebert XDH has been shut off before beginning to remove the fan tray. 2.
Specifications 10.
Specifications Table 4 Liebert XD Flex Pipe assemblies, supply and return Description Liebert XD Flex Pipe Kit Liebert P/N Straight Connection Assembly Liebert P/N 90-Degree Connection Assembly 186566G1 186565G1 6 (1.8) 186566G2 186565G2 10 (3.0) 186566G3 186565G3 8 (2.5) 186566G4 186565G4 4 (1.
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