Liebert XDK User Manual
Precision Cooling
For Business-Critical Continuity™
Liebert XDK™ Rack Enclosure With Integrated Water-Based Cooling
User Manual–17kW
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 complies with the applicable VDE and accident prevention regulations. Hazardous voltages (higher than 50 VAC or higher than 100 VDC) are present:
• inside the electric box in the unit's housing
• behind the fan cover on the outside of the rear door
Shut down the unit immediately if there are problems with electrical input or cold water supply.
WARNING
!
Risk of electric shock. Can cause injury or death.
Disconnect all local and remote electric power supplies before working within.
Only qualified personnel may perform repair, maintenance, and cleaning operations.
NOTE
Cleaning and servicing must be performed by qualified personnel. To ensure that the unit
remains safe to use and has a long service life, observe the maintenance and cleaning intervals.
Operate the XDK correctly within the stipulated ratings and with approved equipment.
During all work on and with the unit, observe:
• All applicable regulations (e. g., VDE regulations and other applicable national regulations)
• All applicable accident prevention instructions (BGV)
• All applicable laws on environmental protection
Operate the XDK only if it is in proper working condition. If a malfunction or fault occurs, you must
shut down the unit immediately and notify the responsible facility official or employee.
Resume operating the unit only after the malfunction or fault has been rectified and the XDK’s function has been re-established.
CAUTION
!
Risk of contact with hot surfaces. Can cause burn injury.
Fans, power supplies, PC boards, and other components become extremely hot during unit
operation. Allow sufficient time for them to cool before working within the unit.
Use extreme caution and wear protective gloves and arm protection when working on or near
hot components.
TABLE OF CONTENTS
IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INSIDE FRONT COVER
1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
2.0 OPERATING CONDITIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2.1 Proper Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3.0 DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
3.1 General function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3.2 Principle of Cooling Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.2.1 Data Overview—XDK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.3 Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.4 Automatic Door Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.4.1 Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4.2 Initial Commissioning: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.4.3 Manual Closing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3.4.4 Manual Opening . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.0 EQUIPMENT INSPECTION, HANDLING AND STORAGE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 Packaging Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2 Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.3 Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
4.4 Returning the Unit in Case of Damage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5.0 INSTALLATION AND COMMISSIONING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.1 Preparation for Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.2 Positioning the XDK. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.2.1 Remove Recirculation Air Duct Transport Lock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
5.3 Water Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.3.1 Preparing Heat Exchanger for Initial Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5.4 Condensed Water Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
5.5 Electrical Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5.6 Sealing the Cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.0 SERVICING AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
6.1 General Inspection on Fans—Annual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.1.1 Fan Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.2 Inspect the Heat Exchanger—Annual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.3 Replacing the Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.0 DISMANTLING AND DISPOSAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19
8.0 WATER PURITY REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
8.1 Unit Installation Checklist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.2 Commissioning Certificate. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
i
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Figure 5 Remove the transport lock screws . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 6 Heat exchanger access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 7 Control valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 8 Heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 9 Heat exchanger connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 10 Bottom plate with cutouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 11 Replacing a fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 12 Heat exchanger replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
TABLES
Table 1 General operating data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Table 2 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 3 XDK general data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 4 Prevalent impurities and removal methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 5 Suggested hydrologic levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Table 6 XDK – Commissioning certificate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 7 Nominal values at setup site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Table 8 Type of cabinet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 9 Control of status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Table 10 Cold water facility on site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 11 Electrical data / documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Table 12 Function check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
ii
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 environment. (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.
Introduction
1
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 improper operation. Can cause equipment damage. For reliable function of the XDK,
cold water must be available in the correct amount, and at the correct temperature and
pressure. Observe water quality specified in VGB-R 455 P. (see 8.0 - Water Purity
Requirements ).
Table 1 General operating data
Ambient temperature
Absolute humidity in the installation location 8g H
Water temperature, supply 54°F (12°C); other temperatures upon request
Water temperature, return 64°F (18°C); other temperatures upon request
Water connection from below
Condensed water connection from below
Nominal voltage 200V to 264V (50Hz and 60 Hz)
Maximum operating pressure 145 PSI (10 bar)
50°F to 95°F (10°C to 35°C)
(other temperatures upon request)
O/ kg air maximum
2
Operating Conditions
2
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 according to heat load.
The air circuit is closed such that no heat is emitted to the environment.
CAUTION
!
Risk of improper operation. Can cause equipment damage.
The XDK works only if cold server feed air and heated server outlet air are fully separated.
Height units not in use must be sealed with blanking panels.
Figure 1 Cooling airflow, top view
Description
Air Duct
WarmWarm
Warm Warm
Server
Cold
Air
Separation
Cold
Front
3
3.2 Principle of Cooling Operation
Figure 2 Cooling airflow, side view
Fan
Bank
Description
Rear
of
XDK
19" Equipment
Front
of
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 components.
Cold water is provided by a separate Liebert XD Pumping unit.
A condensate tray with a 5/8" outlet is below the heat exchanger.
NOTE
If the rear door (with fans) is opened, the front door must be opened. If the front door is opened,
it is not necessary to open the rear door.
4
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
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) (other temperatures upon consultation)
Max. operating pressure 145 PSI (10 bar)
Water supply connection 1"
3.2.1 Data Overview—XDK
Table 3 XDK general data
Nominal Cooling Capacity 17kW @ 54°F (12°C) EFT
Height, in (mm) 86.6 (2200)
Width, in (mm) 31.5 (800)
Depth, in (mm) 47 (1200)
Usable Height for Electronic
Equipment
Maximum Electronic
Equipment Depth, in (mm)
Electronic Equipment
Air Temperature, In/Out, °F (°C)
Weight, Empty, lb (kg) 683 (310)
Maximum Weight, Filled 2,800 (1310)
Maximum Operating
Water Pressure, psi (bar)
Water Flow Rate, GPM (m
Water Pressure Drop, psi (bar) 10 (0.7)
Water Connections, in 1
Maximum Air Flow, CFM ( m
Sound Pressure Level 55 dB(A) at 3 ft (1m)
Input Voltage 200-264 V, 1 ph, 50/60 Hz
Maximum Power Draw 1400W
Options Leveling Feet or Casters
Noise level 55 dB(A) sound pressure at a distance of 3 ft. (1m)
Useful load 2204 lb (1000kg)
40 U
29 (740)
68/98 (20/37
145 (10)
3
/h) 10.7 (2.44)
3
/h) 1800 (3,100)
Description
5
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 failure of the temperature sensor set the fans to maximum speed.
The water flow rate is controlled by a three-way valve depending on thermal load. In case of failure,
the valve opens and the all the chilled water flows through the heat exchanger.
From 61°F to 66°F (16°C to 19°C), the three-way valve controls the water flow rate from 0% to 100% of
the nominal flow rate.
The programming of the control is factory-set and protected with a password.
The failure of the temperature sensor or one of the fans will set off an alarm using a potential free
contact.
The outgoing alarms with potential free contact are:
• sensor error
• fan malfunction
• high-temperature / low-temperature
Description
The fans are automatically shut down if the server cabinet rear door is opened.
3.4 Automatic Door Opening
Figure 3 XDK door and automatic opening mechanism
Upper magnet
and retaining
plate
Gas pressure spring
6
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