Precision Cooling For Business-Critical Continuity™ Liebert® XDC™ User Manual - 50 and 60 Hz, 130 & 160kW Nominal Cooling Capacity
GENERAL SAFETY GUIDELINES Before beginning the installation of the Liebert XDC, read all instructions, verify that all the parts are included, and check the nameplate to be sure the Liebert XDC voltage matches available utility power. Follow all local codes. ! WARNING Risk of electric shock. Can cause injury or death. Disconnect all local and remote electric power supplies before working within. ! WARNING Risk of unit falling over. Can cause death, injury and equipment damage.
TABLE OF CONTENTS GENERAL SAFETY GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INSIDE FRONT COVER 1.0 PRODUCT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 1.1 General Product Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.1.1 Product/System Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.3 Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 5.3.1 5.3.2 5.3.3 5.3.4 5.3.5 5.3.6 5.3.7 5.3.8 5.3.9 5.3.10 5.3.11 5.3.12 5.3.13 5.3.14 5.3.15 5.3.16 5.3.17 Viewing or Changing Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SETPOINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURES Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Liebert XDC components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Moving Liebert XDC with forklift . . . .
TABLES Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Table 12 Table 13 Table 14 Table 15 Table 16 Table 17 Table 18 Table 19 Table 20 Table 21 Table 22 Table 23 Table 24 Table 25 Table 26 Table 27 Table 28 Liebert XDC dimensions, weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Liebert XDC piping connection sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Description 1.0 PRODUCT DESCRIPTION 1.1 General Product Information 1.1.1 Product/System Description The Liebert XDC™ (eXtreme Density Chiller) is self-contained refrigeration distribution unit designed to cool rooms with high heat producing equipment. There are two distinct circuits, each utilizing different refrigerants and mechanical parts. The R-134a circuit is the “pumped” circuit containing redundant circulating pumps, a brazed plate heat exchanger along with valves and piping.
Product Description 1.3.1 Handling With Skid • Always keep the unit upright, indoors and protected from damage. • If possible transport the unit using a forklift truck; otherwise use a crane with belts or cables. When using a crane, apply spreader bars to avoiding pressing on the top edges of the packaging. • Personnel should be properly certified and trained to move and rig equipment.
Product Description 4. Move the Liebert XDC to its installation location. ! WARNING Risk of unit falling over. Can cause death, injury and equipment damage. The Liebert XDC is top-heavy. Use extreme caution and care when moving and installing this unit. 5. Remove all lag bolts from the four (4) corner tie-down brackets. Remove the tie-down brackets from the unit. (see Figure 3). Figure 3 Remove tie-down brackets Unscrew lag bolts and remove brackets to release the XDC from the pallet.
Product Description 1.3.3 Removing Piano Jacks Once the unit has been moved to the installation location, Emerson Network Power recommends using the following method to remove the piano jacks. 1. Lower the unit as far as the piano jacks will allow. 2. Undo all strapping holding the piano jacks to the unit. 3. Remove all cushioning material that might have been used to protect the unit panels from the strapping and/or the piano jacks. 4.
Product Description Figure 6 Piping locations ** To first cooling module or bypass flow controller Install replaceable filter dryer assembly in liquid supply line G * Orientation determined by installer. F - Return From Cooling Units G - Supply to Cooling Units 47" (1193.8mm) 44" (1117.6mm) 6" (152mm) 23" (584.2mm) Dimensions are approximate and subject to change without notice.
Product Description 1.4.2 Placing the Liebert XDC on a Floor Stand ! WARNING Risk of top-heavy unit falling over. Improper handling can cause equipment damage, injury or death. Read all of the following instructions before attempting to move, lift, remove packaging from or preparing unit for installation.
Product Description Figure 7 Water/glycol Liebert XDC on a floor stand—positioning and piping connections A - Return from Cooling Units 47" (1194mm) B - Supply to Cooling Units 44" (1118mm) 6" (153mm) 23" (584mm) Welded Tab C - Hot Gas Refrigerant Lines A D - Liquid Refrigerant Lines DETAIL A Customer Water Supply E - Threaded Female Connections Customer Water Return F - Cup Fitting Capillary Lines are 48" (1220mm) Limit Valve Distance from Condensers Customer Provided Piping Table 3 Model
Product Description Figure 8 Piping locations—floor stand and valve assembly 33" (838mm) 72" (1,828mm) 24" Nominal (609mm) TOP VIEW OF FLOOR STAND Hot Gas 1 Hot Gas 2 Shaded areas indicate a recommended clearance of 36" (915mm) for component access and water/glycol piping.
Product Description 1.4.3 Positioning the Liebert XDC with Floor Stand Install the Liebert XDC according to the site-specific documentation and secure the unit to the floor. The Liebert XDC can be installed near a wall or another Liebert XDC. There must be at least 3 feet (914mm) clearance in front of the Liebert XDC for service access. When the Liebert XDC is combined with the optional water/glycol floor stand, Liebert recommends leaving 3 feet (914mm) of clearance on the left side of the unit.
Product Description 1.5 High Voltage Connections Make sure the actual supply voltage and frequency correspond to the voltage and frequency indicated on the Liebert XDC’s rating plate. Connect cables for high voltage supply to the electrical box in the Liebert XDC according to Figures 5, 11 and 12 and make sure that the phases are correctly connected. ! WARNING Risk of electric shock. Can cause death or injury. Disconnect all local and electric remote power supplies before working within.
Product Description 2. Determine which knockouts in the electrical enclosure will be used and remove them (see Figure 11). Figure 11 Electrical enclosure knockout locations for field wiring Knockout for Input Power Enclosure Cover Not Shown for Clarity 3. Route the input hazardous voltage electrical power wiring through the top right knockout on the primary electrical enclosure (see Figure 11) to the disconnect switch L1, L2 and L3 (see Figure 12). Observe proper phasing. 4.
Product Description Figure 13 50Hz models high voltage connections—primary disconnect switch Compressor Circuit Breakers Busbar Primary Power Block Customer Power Connection Wire Raceway Ground Lug Primary Disconnect Switch Compressor Contactors Transformer 3 Relay Electronic Hot Gas Bypass Controllers Figure 14 60Hz models high voltage connections—secondary disconnect switch Power Connection From Primary Power Block Ground Lug Secondary Disconnect Switch Transformer 2 Pump Fuse Blocks Second
Product Description Figure 15 50Hz models high voltage connections—secondary disconnect switch Power Connection From Primary Power Block Secondary Disconnect Switch Ground Lug Transformer 2 Pump Circuit Breakers Power Block Fuse Blocks Busbar Transformer 1 Pump Contactors 1.6 Extra Low Voltage Connections Extra Low Voltage (ELV) power output is 30V and 100VA or less. 1. Turn off all unit power before connecting cables or wires. Failure to do so may damage this equipment. 2.
Product Description Figure 17 Electrical enclosure knockout locations for Extra Low Voltage connections User Interface (Wall Box) Wiring Liebert XD Module Condensate Connections (optional; depends on features supplied with Liebert XD Module) Temperature/Humidity Sensor Wiring Alternate Knockout for Temperature/Humidity Sensor Wiring Enclosure Cover Not Shown for Clarity Field Connections—All Units • Connect the control display panel cable to terminal block TB3 terminals 1 through 4 on the Liebert XDC
Product Description Figure 18 Extra Low Voltage field connections points Control Display Panel Four thermostatic wires to be connected toTB3 Temperature/Humidity Sensor Cable Provided with Temperature/Humidity Sensor Board TS-3 TS-4 TS-5 TS-6 Factory-Wired Temperature Sensor(s) H2O (24) RAD1 (50) XDOC (51) K3COM K3NO K3NCL 37 38 77 78 Control wiring must be Class 2 and installed in accordance with the National Electrical Code (NEC) Requires shielded cable 15
Piping and Filling with Refrigerant: R-134a and R-407c Circuits 2.0 PIPING AND FILLING WITH REFRIGERANT: R-134A AND R-407C CIRCUITS 2.1 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).
Piping and Filling with Refrigerant: R-134a and R-407c Circuits Figure 19 Liebert XD system diagram Liebert XD Cooling Modules Liebert XDP/ Liebert XDC 2.
Piping and Filling with Refrigerant: R-134a and R-407c Circuits Bypass Flow Controllers To ensure the Liebert XDC pumps operate within the optimum range, some installations require one or more bypass flow controller(s). These devices are added to the field piping, and simulate the flow of additional cooling modules. Each bypass flow controller should be installed with one shutoff valve to allow the controller to be disabled when cooling modules are added to a Liebert XD system.
Piping and Filling with Refrigerant: R-134a and R-407c Circuits Figure 22 Bypass flow controller piping Liebert XD Cooling Module #1 Liebert XD Cooling Module #2 Bypass Flow Controllers Coolant Supply Coolant Return Filter Dryer Assembly Liebert XDP or Liebert XDC Evacuation and Leak Check—R-134a Pumped Circuit 1. Open all service valves, including those located outside of the Liebert XDC. 2. Place 150 psig (1034kPa: 10.34 bars) of dry nitrogen with a tracer of R-134a in the system.
Piping and Filling with Refrigerant: R-134a and R-407c Circuits 2.5 Filling the Pumped Circuit—R-134a 1. Connect a charging manifold to the service port of the receiver outlet valve. 2. Purge the hoses. 3. Calculate the amount of R-134a refrigerant needed to charge the system, using the values in Tables 6, 7, 8 and 9; for assistance, refer to 2.5.1 - Calculating Refrigerant Charge— Example. The section includes a worksheet to calculate system refrigerant charge requirements. 4.
Piping and Filling with Refrigerant: R-134a and R-407c Circuits Table 9 R-134a refrigerant charge for Liebert XD Flex Pipe connector lines to and from any model Liebert XDO/Liebert XDH/Liebert XDV/Liebert XDCF Refrigerant Charge, lb. (kg) Metal Liebert XD Flex Pipe Connector Length Supply Line Diameter 1/2" 0.3 lb. (0.14) 4 ft. Liebert XD Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF supply 0.5 lb. (0.23) 6 ft.
Piping and Filling with Refrigerant: R-134a and R-407c Circuits 2.5.2 Piping for Direct Expansion (DX) Circuit—R-407c Air Cooled Units ! WARNING Risk of refrigerant system explosion or rupture from overpressurization. Can cause death, injury and equipment damage. Installer must install a 400 psig pressure relief valve in each of the two R-407c refrigerant circuits of the Liebert XDC system. Do not install shutoff valves between the compressors and the pressure relief valves.
Piping and Filling with Refrigerant: R-134a and R-407c Circuits For Air Cooled Lee-Temp / Flood Back Head Pressure Control Units Only NOTE Proper safety equipment and proper refrigeration tools are required. Check unit nameplate for correct refrigerant type before topping off or recharging a system. NOTE Refrigerant R-407c is a blend of three components and must be introduced and charged from the cylinder only as a liquid. Refrigerant R-407c uses a POE (polyolester) lubricant.
Piping and Filling with Refrigerant: R-134a and R-407c Circuits Figure 24 Installation data—Lee-Temp, one-circuit, four-fan model Field-supplied main disconnect switch in accordance with local codes or main unit switch ordered as optional equipment factory-installed in condenser control box.
Piping and Filling with Refrigerant: R-134a and R-407c Circuits Figure 25 Installation data—Lee-Temp, one-circuit, high ambient six-fan model Field-supplied main disconnect switch in accordance with local codes or main unit switch ordered as optional equipment factory-installed in condenser control box. * Liquid line from condenser (Circuit 1) * Hot gas line from unit (Circuit 1) B 5 Lee-Temp heater pad electric box this end (See DPN000937,Pg.
Piping and Filling with Refrigerant: R-134a and R-407c Circuits Figure 26 Liebert XDC piping schematic and Lee-Temp heater pad wiring Inverted Trap (By Others) Rotalock Valve Combination Head Pressure Control & Check Valve Condenser Control Box Pressure Relief Valve Lee-temp Winter System Air Cooled Condenser Heater Pads Solenoid Valve Dehydrator Liquid Level Indicator Expansion Valve External Equalizer Hand Shutoff Valve By Others Sight Glass Sensing Bulb Hot Gas Bypass Valve Service Valves Su
Piping and Filling with Refrigerant: R-134a and R-407c Circuits Figure 27 General arrangement air cooled Liebert XDC Lee-Temp Control Condenser Coil Inverted Trap * on discharge line to extend above base of coil by a minimum of 7-1/2" (190mm) Additional Piping Assembly ** Check Valve Head Pressure Control with Integral Check Lee-Temp Valve Receiver Traps * every 25 ft. (7.6m) of rise on hot gas line only Rotalock Valve ** 1/4" (6.
Piping and Filling with Refrigerant: R-134a and R-407c Circuits Figure 28 DCSL616 piping connections—two refrigerant circuits connected for parallel flow Condenser Coil (Circuit 2) Condenser Coil (Circuit 1) Inverted Trap * on discharge line to extend above base of coil by a minimum of 7-1/2" (190mm) Additional Piping Assembly ** Check Valve Head Pressure Control with Integral Check Valve Traps * every 25 ft (7.
Piping and Filling with Refrigerant: R-134a and R-407c Circuits Figure 29 CSL616 piping connections—two refrigerant circuits connected for parallel refrigerant flow Liquid line (Circuit 1) Hot gas line (Circuit 1) Connect the two refrigerant coils for parallel refrigerant flow using field-supplied piping. Refrigerant lines are to be routed and secured to prevent excessive vibration and stress at the connections. For mounting instructions, refer to Figure 25. 29 DPN000937 Pg. 5, Rev.
Piping and Filling with Refrigerant: R-134a and R-407c Circuits 2.6.1 Air Cooled Condenser with Lee-Temp “Flooded Condenser” Head Pressure Control System—R-407c (DX) Circuit The Lee-Temp system consists of a modulating type head pressure control valves and insulated receivers with heater pads to ensure operation at ambient temperatures as low as -30°F (-34.4°C). Lee-Temp Piping Two discharge lines and two liquid lines must be field-installed between the indoor unit and the outdoor condenser.
Piping and Filling with Refrigerant: R-134a and R-407c Circuits 2.7 Filling the Direct Expansion (DX) Circuit—R-407c NOTE If necessary, refer to 3.0 - Installation Checklist to ensure that the system has been properly checked out and is ready to be filled with coolant. Any recommended volumes will be approximate. The user must verify that all circuits of the system have been adequately filled.
Installation Checklist 3.0 INSTALLATION CHECKLIST ___ 1. ___ 2. ___ 3. ___ 4. ___ 5. ___ 6. ___ 7. ___ 8. ___ 9. ___ 10. Unpack and check received material. Position Liebert XDC and secure to floor. Wire high voltage connections. Wire low voltage connections. Connect Liebert XD cooling module piping to Liebert XDC. Check all circuits of the system for leaks. Hold a vacuum on all circuits of the system. Charge the system with refrigerant. Make sure that all piping has proper insulation.
Checklist for Liebert XDC Startup 4.0 CHECKLIST FOR LIEBERT XDC STARTUP ! WARNING Risk of piping and component rupture. May cause injury or equipment damage. Closing service valves may isolate liquid refrigerant, causing high pressure and rupture of piping. Do not close valves without following recommended procedures for repair, maintenance and replacement of components. Install pressure relief valves in field piping that may become isolated by service valves.
Checklist for Liebert XDC Startup 4.1 System Refrigerant Charges Over 35 lb. (15.9kg) Require Additional Oil System charges over 35 lb. (15.9kg) require additional oil charge to be added. See Figure 30 for the amount required for various charge levels. Once the system has been fully charged with refrigerant, use a hand pump to add the additional oil at the suction side of the system while the system is running.
Checklist for Liebert XDC Startup The Liebert XDC system is now ready to be turned ON. 1. Turn On all fans of the Liebert XD cooling modules. 2. Turn the Liebert XDC On via user interface (I/O button). Allow the system to attempt to start for at least 2 minutes. If the Liebert XDC pump cannot maintain flow and continues to switch over due to starting difficulties, proceed to Step 4 and refer to the troubleshooting section of the Liebert XDC user manual. 3.
Microprocessor Control 5.0 MICROPROCESSOR CONTROL 5.1 Feature Overview The microprocessor control for the Liebert XDC unit features an easy-to-use menu-driven LCD. The menus, control features and circuit board details are described in this section. Figure 32 User interface Up Arrow Key Status Display Down Arrow Key On/Off Key Alarm Silence Key Active alarms are displayed on the LCD screen and sound an audible beep. To silence an alarm, press the Alarm Silence/Help key as prompted on the display.
Microprocessor Control 5.2 Controls The Microprocessor Control for the Liebert XDC features an easy-to-use, menu-driven liquid crystal display. The menus, control features and circuit board details are described in this section. 5.2.1 Feature Overview The Liebert XDC maintains the coolant being pumped to Liebert XD cooling modules at a temperature above the room dew point, preventing condensation. 5.2.
Microprocessor Control 5.3.
Microprocessor Control 5.3.3 STATUS The user can check the status of cooling percentage, pump and compressor operating status and temperature of the refrigerant. VALVE OPEN %—0-100 COMP 1A, 2A, 1B, 2B—On/Off PUMP 1—On/Off PUMP 2—On/Off REFRIG T—Refrigerant temperature 0-100°F 5.3.4 ACTIVE ALARMS This submenu allows the user to review any present alarms. If no alarms are present, the screen will read No Alarms Present.
Microprocessor Control 5.3.8 SETUP OPERATION NOTE None of these setpoints should be changed before consulting a Liebert representative. Changing any of these setpoints could drastically affect the system. Selecting Setpoint/Setup from the Main Menu will display the following selections: Table 22 Setup operation functions default values and allowable ranges. Menu Item Function Default Range RESTART Restart time delay 0.1 min 0 to 9.
Microprocessor Control PUMP OFF TD The user can set the amount of time a pump will remain off when refrigerant flow is interrupted or stops. After the time delay has expired, the control will try to restart the pump (see PUMP START TD). LEAD PUMP This allows the user to select which pump is the active pump. It can be set to PUMP 1 or PUMP 2. The control will operate the respective pump unless a loss of flow condition occurs.
Microprocessor Control 5.3.9 SETPT PASSWORD To prevent unauthorized changes to the control setpoints and alarm settings, the Liebert XDC may be configured to require a three-digit password before permitting setpoint or alarm setting changes. To enable this feature, set DIP switch #8 in the wall box to the Off position. If DIP switch #8 is On, no password is required. Factory default for the setpoint password is 123. To change the password: 1. 2. 3. 4. 5. 6. 7. 8.
Microprocessor Control 5.3.11 CALIBRATE SENSORS The temperature and humidity sensor can be calibrated by selecting this menu item. The temperature sensor can be calibrated ± 5°F and the humidity sensor can be calibrated ±10% RH. To prevent coil condensation that could damage the Liebert XDC, the sensors must be calibrated to a known source. 5.3.12 ALARM ENABLE At the user’s discretion, some alarms may be enabled or disabled.
Microprocessor Control 5.3.13 ALARM TIME DELAY Some alarms can be programmed with a time delay as a means of preventing nuisance alarms. This function specifies the amount of time an alarm must be present before the Liebert XDC recognizes and annunciates the alarm. If the alarm condition goes away before the time delay has expired, the alarm will not be recognized, and the time delay timer will be reset. This can be used as a filter to prevent nuisance alarms from transient events.
Microprocessor Control 5.3.16 CUSTOM TEXT This menu permits the user to set up a custom text message with a maximum length of 16 characters. The message may use any of the following characters or a blank space: ABCDEFGHIJKLMNOPQURSTUVWXYZ#%*-0123456789. This custom text can be designated as the custom alarm text in the CUSTOM ALARMS menu (see CUSTOM ALARMS above). To define the message: 1. 2. 3. 4. 5. Press the ENTER button to access the menu.
Alarm Descriptions and Solutions 6.0 ALARM DESCRIPTIONS AND SOLUTIONS 6.1 Alarm Descriptions NOTE Alarms must be acknowledged before they can be reset. To acknowledge or silence an alarm, press the ALARM SILENCE / ? key. • LOSS OF FLOW P1 – Activated when pump 1 is commanded to run and the differential pressure switch does not sense differential pressure (set at 6 psi; 41 kPa; 0.41 bars).
Alarm Descriptions and Solutions • SHORT CYCLE C1A – Activated when compressor 1A turns On, Off, then back On, 5 times within 10 minutes, or 10 times within 1 hour. • SHORT CYCLE C1B – Activated when compressor 1B turns On, Off, then back On, 5 times within 10 minutes, or 10 times within 1 hour. • SHORT CYCLE C2A – Activated when compressor 2A turns On, Off, then back On, 5 times within 10 minutes, or 10 times within 1 hour.
Alarm Descriptions and Solutions 6.3 Enable / Disable Alarms Any alarm may be enabled or disabled. If an alarm is disabled, the alarm condition will not be monitored and will not trip, will not be in ACTIVE ALARMS, will not be in ALARM HISTORY and will not be annunciated. To enable or disable an alarm, or to check whether an alarm is enabled or disabled: 1. 2. 3. 4. Press the MENU key. Use the up or down arrow key to move to the ALARM ENABLE menu. Press the ENTER key to access the menu.
Alarm Descriptions and Solutions 6.6 View Alarm History To view the alarm history: 1. 2. 3. 4. Press the MENU key. Use the up or down arrow key to move to the ALARM HISTORY menu. Press the ENTER key to enter into the menu. Use the up or down arrow key to move through the menu and view the alarm history. This menu will show the most recent alarm first. This menu also will display the alarm name, alarm number and the time and date of occurrence for the last 60 alarms. 5.
Troubleshooting 7.0 TROUBLESHOOTING Table 24 Liebert XDC troubleshooting Symptom Pump/compressor will not energize Possible Cause Check or Remedy No main power Check L1, L2, and L3 for rated voltage. Loose electrical connections Tighten connections. Overloads tripped Allow pump to cool. Check amp draw. Tripped circuit breaker Check circuit breaker to pump(s). Incorrect phase wiring See Table 18. Isolation valve(s) on pump suction and/or discharge is closed.
Troubleshooting Table 24 Liebert XDC troubleshooting (continued) Symptom Room becomes too warm Pipe rattle Actuator motors (if applicable) Motor burnout Main 24VAC fuse trips Unstable pump operation Possible Cause Check or Remedy Liebert XDC is off. Check status of the Liebert XDC at the user interface. Turn system On at I/O button if system is Off. High dew point Check temperature and relative humidity (RH) of room. Lower RH setpoint if necessary to lower dew point.
Maintenance 8.0 MAINTENANCE The Liebert XD system components require little maintenance when proper fluid levels are maintained and proper startup and operation procedures are followed. The following tasks should be performed at the intervals stated: 1. Check sight glass level of receiver on all circuits every 4-6 weeks. During normal operation, the level should be at or above the first sight glass. 2. Check system for leaks every 4-6 weeks 8.
Maintenance 8.3 Water/Glycol Floor Stand Condenser 8.3.1 Shell and Tube Condensers Each water or glycol cooled module has a shell and tube condenser which consists of a shell, removable heads, gaskets and cleanable copper tubes. It may be necessary to clean the copper tubing periodically to remove any scale or lime that should collect (periods between cleanings will vary with local water conditions).
Specifications 9.0 SPECIFICATIONS Table 25 Liebert XDC specifications XDC160 Water / Glycol XDC160 Air Models XDC160AA XDC160AM 189192G3 189192G5 See Tables 26, 27 and 28 for Water/Glycol performance data The Liebert XDC’s minimum recommended operating load is 40% of system nominal capacity. For example, a Liebert XDC160 60Hz system’s minimum load would be 64 kW. Loading below this value can unfavorably affect system operation. Consult factory for any loading below this recommendation.
Specifications Table 26 Floor stand specifications—water-cooled Liebert XDC Models - 60 Hz XDC160 Water Floor Stand - 60Hz Entering Fluid Temp °F (C) 65 (18) 70 (21) 75 (24) 85 (29) 95 (35) 46.1(162.3) 46.1(162.3) 46.1(162.3) 46.1(162.3) 44.5 (156.5) Performance Data Cooling capacity, tons (kW) Flow, GPM Pressure Drop, psi (Ft Water) 50 58 70 110 142 2.7 (6.2) 4.9 (11.3) 5.4 (12.5) 20.7 (47.8) 27.3 (63.
Specifications Table 28 Floor stand specifications—Liebert XDC with 40% ethylene glycol Models - 60 Hz XDC160 Glycol Floor Stand - 60Hz - 40% EG Outside Ambient °F (°C) 95 (35) 100 (38) 105 (41) Entering Fluid Temp °F (°C) 110 (43) 110 (43) 110 (43) Performance Data Cooling capacity, tons (kW) 42.5 (149.4) Total Heat Rejection, (kW) 192.6 Flow, GPM 204 Pressure Drop, psi (ft water) 35.9 (82.9) Heat Rejection Equipment Drycooler DNT 940A Drycooler Pressure Drop, psi (ft water) 6.5 (15.
Ensuring The High Availability 0f Mission-Critical Data And Applications. Emerson Network Power, the global leader in enabling business-critical continuity, ensures network resiliency and adaptability through a family of technologies—including Liebert power and cooling technologies—that protect and support business-critical systems. Liebert solutions employ an adaptive architecture that responds to changes in criticality, density and capacity.