Precision Cooling
For Business-Critical Continuity™
Liebert® XDH™
User Manual - 50 & 60Hz
Download from Www.Somanuals.com. All Manuals Search And Download.
TABLE OF CONTENTS
GENERAL SAFETY GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INSIDE FRONT COVER
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
References. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Pre-Installation Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Parts Included With the Liebert XDH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.5.1 Room Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
GENERAL PRODUCT INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
Product/System Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Checking and Unpacking. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Equipment Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.3.1 Recyclable Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3.3.2 Unit Handling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.3.3 Unpacking the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.3.4 Taking the Unit off the Pallet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
MECHANICAL CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Determining Placement in the Conditioned Space. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installing the Liebert XDH Within the Enclosure Row . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.2.1 Airflow Direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
European Union Fluorinated Greenhouse Gas Requirements . . . . . . . . . . . . . . . . . . . . . . . 12
System Connection Configuration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Connection Methods and Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Piping Considerations—Hard-Piped Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.4.1 Venting the Holding Charge and Connecting to Mains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
5.4.2 Brazing Preparations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Connection Methods for Hard Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Recommended Piping Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5.6.1 Connecting Methods—One-Shot Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Field Installation of Liebert XD Flex Pipe Kit on the Liebert XDH . . . . . . . . . . . . . . . . . . . 18
Connecting Liebert XD Flex Pipes to Liebert XDH Modules. . . . . . . . . . . . . . . . . . . . . . . . . 19
5.8.1 Header System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.9
Connecting a Liebert XDH with Liebert XD Flex Pipe to an Operational Liebert
XD System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
5.11 Insulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
6.2
ELECTRICAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
Connecting High Voltage Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Connecting Low Voltage Wiring—Optional . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
i
Download from Www.Somanuals.com. All Manuals Search And Download.
Checklist for Proper Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Charging with Refrigerant and Starting the Liebert XD System . . . . . . . . . . . . . . . . . . . . . 25
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
Start the Liebert XDH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Internal Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Fluorinated Greenhouse Gas Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Remove Fan Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
10.0 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
FIGURES
Figure 1
Liebert XDH component locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Liebert XDH model number nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Liebert XDH hydraulic schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Recommended unit handling equipment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Removing shipping package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Prepare ramp to remove the Liebert XDH from shipping pallet . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Attaching ramp, removing the Liebert XDH from pallet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Liebert XDH dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Liebert XDH placement in enclosure row . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Figure 10 Change airflow direction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Figure 11 Typical Liebert XDH piping—interlaced connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 12 Typical Liebert XDH piping—non-interlaced connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 13 Direct system configuration—hydraulic system schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 14 Indirect system configuration—hydraulic system schematic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Figure 15 Hard pipe connection diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Figure 16 Supply and return—hard-piping connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Figure 17 Piping location and connecting sizes for pre-charged units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Figure 18 Liebert XD Flex Pipe dimensions—straight and 90-degree connections. . . . . . . . . . . . . . . . . . . . 18
Figure 19 Liebert XD prefabricated piping assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 20 Detail view of Liebert XD Flex Pipe and prefabricated piping port. . . . . . . . . . . . . . . . . . . . . . . . 20
Figure 21 Liebert XD system with prefabricated piping assembly and Liebert XD Flex Pipe . . . . . . . . . . 21
Figure 22 Profile view of the Liebert XD system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 23 Piping mains without Liebert XDH and Liebert XD Flex Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Figure 24 Liebert XDH electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 25 Condensate wiring entry points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Figure 26 Fan switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Figure 27 Remove fan tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
TABLES
Application limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Branch piping sizes for pumped refrigerant loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Liebert XDH specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Liebert XD Flex Pipe assemblies, supply and return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
ii
Download from Www.Somanuals.com. All Manuals Search And Download.
Liebert XDH Component Locations and Model Number Nomenclature
1.0 LIEBERT XDH COMPONENT LOCATIONS AND MODEL NUMBER NOMENCLATURE
Figure 1
Liebert XDH component locations
FRONT
(Top View)
Air
Return
Vents
Controls
Return Piping
Connection -
Bottom Circuit
Return Piping
Connection -
Top Circuit
Cooling
Air Supply
Vents
Supply Piping
Connection -
Bottom Circuit
Supply Piping
Connection -
Bottom Circuit
REAR
FRONT
Upper
Refrigeration
Circuit
FRONT
(Bottom View)
FRONT
Lower
Refrigeration
Circuit
Condensate Pan
and Detection
Option (also in
bottom circuit)
Condensate
Detection
Connections
Casters
(one at each
corner)
REAR
Adjustable Foot
(one at each corner)
Electrical
Connections
Stabilizers (one
at each corner)
Figure 2
Liebert XDH model number nomenclature
Example: XDH32BK— —0
XD
H
32
B
K
—
—
0
Liebert
X-Treme heat
density system
20 = Model size
32 = Model size
K = 120V-1ph-60Hz
S = 208-240-1ph-60Hz
220-240-1ph-50Hz
— = Domestic packaging
E = Export packaging
Revision level
Horizontal row cooler
B = Base unit
— = Hard piped
D = Condensate detection P = Pre-charged (one-shot) Coupling
R = Removable Coupling
1
Download from Www.Somanuals.com. All Manuals Search And Download.
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 hot-
aisle-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. The cooling air is then drawn into the enclosures to cool the
equipment.
The Liebert XDH has dual refrigeration circuits, one in the upper half of the unit and the other in the
lower half. This permits increasing and decreasing cooling levels in response to server room condi-
tions. The dual refrigeration circuits permits interlaced connection of two Liebert XD refrigerant
sources to enhance system reliability.
Controls on the front of the Liebert XDH permit independent operation of the two banks of fans. Dual
power connections ensure continued fan operation if one of two electrical sources fails.
The Liebert XDH is intended for use in low-humidity environments and does not need a drain connec-
tion. A condensate pan under each refrigeration unit collects the small amount of moisture expected
in the server room. An optional, factory-installed condensate detection system is available. The Lie-
bert XDH is available with uni-directional or bi-directional air diffusers.
2.2
2.3
References
This document must be used together with site specific documentation and documentation for other
parts of the system.
Pre-Installation Checks
• Verify that the Liebert XDH voltage matches the available utility power. The serial tag with this
information is accessible by opening the Liebert XDH’s rear door. The tag is on a shelf near the
Liebert XDH’s midline.
• Check the received materials to be sure all required assemblies and parts have been received. If
you discover any external damage, report it to the shipping company and your local Liebert repre-
sentative.
2.4
Parts Included With the Liebert XDH
• User manual (this document)
• Liebert XDH module
• Power cords
• Shipping/floor mounting brackets
• Tie-down bracket assembly
• Diffusers (top and bottom)
2
Download from Www.Somanuals.com. All Manuals Search And Download.
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.
Be sure to follow all applicable codes.
Determine whether the Liebert XDH includes the condensate detection option (factory-installed).
This option will require separate low voltage connections to a monitoring unit. A front panel alarm
and indicator alert the user to condensation inside the unit. To minimize the possibility of condensa-
tion, insulate all piping between the Liebert XDH and the Liebert XDP or Liebert XDC.
If the Liebert XDH is installed at the end of a row, Liebert recommends using uni-directional air dif-
fusers to direct cooling air into the cold aisle, toward the equipment racks. If the Liebert XDH is
installed between racks within a row, Liebert recommends using bi-directional air diffusers, directing
the cooling air toward the equipment racks on either side of the Liebert XDH.
Table 1
Input Voltage
Minimum Maximum
-10% +10%
Application limits
Range of Return Air Conditions to Unit
Dry Bulb Temperature
Relative Humidity
60° to 100°F (16° to 38°C)
20% to 80%
2.5.1 Room Preparation
The room should be well-insulated and must have a sealed vapor barrier. The vapor barrier in the
ceiling and walls can be a polyethylene film. Paint on concrete walls and floors should contain either
rubber or plastic.
NOTE
The vapor barrier is the single most important requirement for maintaining environmental
control in the conditioned space.
Outside or fresh air should be kept to a minimum when temperature and humidity must be tightly
controlled. Outside air adds to the cooling, heating, dehumidifying and humidifying loads of the site.
Doors should be properly sealed to minimize leaks and should not contain ventilation grilles.
3
Download from Www.Somanuals.com. All Manuals Search And Download.
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.
Chilled R-134a refrigerant is provided to the Liebert XDH by a Liebert XD Pumping unit (Liebert
XDP) or by a Liebert XD Chiller (Liebert XDC). The Liebert XDH may be installed in a Liebert XD
piping system that includes other Liebert XD cooling modules, such as the Liebert XDO, Liebert XDV
or Liebert XD CoolFrame.
Replaceable front panels on the Liebert XDH may be customized to match the appearance of various
computer manufacturer’s equipment, allowing the Liebert XDH to blend in with adjacent server
equipment and enclosures. Air diffusers are available to direct cooling air for more efficient cooling,
depending on the Liebert XDH’s positioning in a row or at the end of a row.
The Liebert XDH is not expected to produce any condensation because of its location, usually in the
data center. A condensate pan is provided as a precaution. It does not have a drain fitting or other
means of being emptied.
A Liebert Liqui-tect moisture detection device and a contact-closure output are available as an option.
These options detect condensation in the Liebert XDH’s catch pan and connect to a monitoring or
alarm system. A front panel alarm and indicator alert the user to condensation inside the unit.
The complete cooling system consists of Liebert XDH modules, Liebert XDP or Liebert XDC pumped
refrigerant distribution units, power and signal cabling and interconnecting piping, see Figure 3
below.
Figure 3
Liebert XDH hydraulic schematic
Liebert XDC
or
Liebert XDP
XD Cooling
Module *
Supply Lines
(2 per unit)
Pumped
Refrigerant
Return Lines
(2 per unit)
XD Cooling
Module *
Liebert XDC
or
Liebert XDP
XD Cooling
Module *
Pumped
Refrigerant
XD Cooling
Module *
* XDCF, XDH, XDO
or XDV
3.2
Checking and Unpacking
When the Liebert XDH is delivered, inspect all items for either visible or concealed damage. Damage
should be immediately reported to the carrier and a damage claim filed with a copy sent to Liebert or
to your sales representative. If you later find any concealed damage, report it to the shipping company
and your local Liebert representative.
Check to be sure all required assemblies and parts have been received.
remove these protective items from the Liebert XDH before it is at the installation location. When
unpacking and handling the Liebert XDH, exercise extra care to prevent damage.
4
Download from Www.Somanuals.com. All Manuals Search And Download.
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 repre-
sentative.
3.3.1 Recyclable Packaging
All material used to package this unit is recyclable. Please save for future use or
dispose of the material appropriately.
R
WARNING
!
Risk of top-heavy unit falling over. Can cause death, injury and equipment damage.
Read all of the following instructions before attempting to move, lift, remove packaging from
the unit, or preparing unit for installation.
CAUTION
!
!
Risk of overhead interference. Can damage unit or structure.
The unit may be too tall to fit through a doorway while on the skid. Measure the unit and
doorway heights and refer to the installation plans before moving the unit to verify
clearances.
CAUTION
Risk of sharp edges, splinters and exposed fasteners. Can cause personal injury.
Only properly trained personnel wearing appropriate safety headgear, gloves, shoes and
glasses should attempt to move, lift, remove packaging from, or prepare unit for installation.
CAUTION
!
!
Risk of damage from forklift. Can cause exterior and/or underside damage.
Keep tines of the forklift level and at a height suitable to fit below the skid.
CAUTION
Risk of hazardous environments. Can cause unit damage.
Keep the unit indoors and protected from dampness, freezing temperatures and contact
damage.
Figure 4
Recommended unit handling equipment
Pallet Jack
Forklift
5
Download from Www.Somanuals.com. All Manuals Search And Download.
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. If it must be lifted higher than 6"
(152mm), exercise great care and keep all personnel who are not helping move the unit at least 20'
(5m) away from the unit.
• The Liebert XDH ships with four outrigger-style wheels to permit rolling it into position. Liebert
recommends using a forklift or pallet jack to move the Liebert XDH as near as practical to its
installation site before removing it from the shipping pallet.
3.3.3 Unpacking the Unit
1. Remove the exterior stretch-wrap packaging from around the unit, exposing the protective corner
and side packaging planks.
2. Remove the ramp, corner and side packaging planks from the unit, exposing the bag over the unit.
Remove the bag when ready to install the Liebert XDH.
Figure 5
Removing shipping package
Planks at the corners and on
the sides protect the Liebert
XDH during shipping
Exterior stretch wrapping
surrounds other protec-
tive shipping features
Leave the plastic bag on the unit
until it is off the pallet and ready
to be installed
Ramp
(secured to the Liebert XDH by a
layer of shrink-wrap)
NOTE:
One ramp will be shipped per order.
Ramp
(removed from pallet)
6
Download from Www.Somanuals.com. All Manuals Search And Download.
General product information
3.3.4 Taking the Unit off the Pallet
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. Liebert recommends using a forklift or pallet jack to move the Liebert XDH as
near as practical to its installation site before removing it from the shipping pallet.
3. Rotate the metal bracket 180 degrees and insert the shortest slot of the metal bracket under the
hex screw head and tighten the hex screw.
4. Loosen the two hex screws on the skid.
5. Align the ramp and the metal bracket with the skid. Ensure that the ramp is in contact with the
7. Tighten the hex screws on the skid.
8. Remove the six hex screws from each of the two tie-down brackets, one located on either end of the
9. Remove the two tie-down brackets.
10. At least two properly trained personnel may roll the Liebert XDH down the ramp and off the
pallet onto a flat surface.
Figure 6
Prepare ramp to remove the Liebert XDH from shipping pallet
Lag screw
to secure bracket
to ramp
Metal
Bracket
7
Download from Www.Somanuals.com. All Manuals Search And Download.
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.
Figure 8
Liebert XDH dimensions
12"
(305mm)
80"
(2032mm)
78"
(1981mm)
FRONT
42
(1067mm)
FRONT
4.2
Installing the Liebert XDH Within the Enclosure Row
Built-in casters allow rolling the Liebert XDH into position for installation. Stabilizers reduce the like-
lihood of the unit tipping over. These stabilizers must be removed before the unit is positioned in the
row. Adjustable leveling feet prevent it from moving after positioning.
Once positioned, the Liebert XDH must be secured either to the floor with the included shipping
brackets or to an adjacent cabinet. An adjustable bracket (Liebert P/N 187642G1) for attaching the
Liebert XDH to an adjacent cabinet is included with each unit.
9
Download from Www.Somanuals.com. All Manuals Search And Download.
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 dif-
fusers. 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.
These diffusers blow air right and left, as well as to the front.
Two diffusers were shipped with the Liebert XDH. If uni-directional diffusers were ordered, the dif-
fuser with the part number 186458 is designed for installation on the upper half of the Liebert XDH.
The other diffuser, for use on the lower half of the Liebert XDH, has the part number 186459. When
installed in these positions, the diffusers will direct the airflow to the left.
If directing the airflow in the opposite direction would improve cooling, the diffusers may be switched.
Figure 9
Liebert XDH placement in enclosure row
Hot
Aisle
Cold
Aisle
Hot
Aisle
Cold
Aisle
10
Download from Www.Somanuals.com. All Manuals Search And Download.
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
The vanes in the diffuser now point in the opposite direction.
Liebert XDH.
Figure 10 Change airflow direction
Top Diffuser, Part # 186459,
may be rotated180 degrees
and installed on the lower half
of the Liebert XDH
11
Download from Www.Somanuals.com. All Manuals Search And Download.
Piping
5.0 PIPING
5.1 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 requires operators to use use all measures that are technically feasible and do
not entail disproportionate cost to prevent leakage of these gases, to test for leakage regularly and to
recover f-gas before disposing of equipment, as well as during service and maintenance.
Refer to the full regulation for additional details.
5.2
System Connection Configuration
If possible, connect the Liebert XDH’s upper and lower refrigeration circuits to Liebert XDPs or Lie-
bert XDCs in an interlaced configuration (see Figure 11). Interlacing the connection piping will keep
one of the Liebert XDH’s circuits operating should one of the Liebert XDP or Liebert XDC units fail.
However, in a system with just one Liebert XDP or Liebert XDC, connect Liebert XDH modules in a
Figure 11 Typical Liebert XDH piping—interlaced connections
Liebert
XDH
Liebert
XDH
Liebert
XDH
Liebert
XDH
Unit 1
Unit 2
Unit 3
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.
Liebert XDP /
Liebert XDC #2
Liebert
Liebert
Liebert
Liebert
XDH
XDH
XDH
XDH
Unit 5
Unit 6
Unit 7
Unit 8
12
Download from Www.Somanuals.com. All Manuals Search And Download.
Piping
Figure 12 Typical Liebert XDH piping—non-interlaced connection
Liebert
XDH
Liebert
XDH
Liebert
XDH
Liebert
XDH
Unit 1
Unit 2
Unit 3
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.
Liebert XDP /
Liebert XDC #2
Liebert
Liebert
Liebert
Liebert
XDH
XDH
XDH
XDH
Unit 5
Unit 6
Unit 7
Unit 8
Figure 13 Direct system configuration—hydraulic system schematic
Direct Liebert XD System Configuration
Pumping and control are performed by Liebert XDC.
Liebert
Liebert
Liebert XD
Cooling Module *
Heat
XDC Coolant
Supply Piping
Return Piping
Rejection
Chiller
Pumped
Refrigerant
Liebert XD
Cooling Module *
Liebert
XDC Coolant
Chiller
Liebert XD
Cooling Module *
Pumped
Refrigerant
* Liebert XDCF,
Liebert XDH, Liebert
XDO or Liebert XDV
Liebert XD
Cooling Module *
13
Download from Www.Somanuals.com. All Manuals Search And Download.
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.
Building
Chilled
Water
Liebert
XDP
Liebert XD
Cooling Module *
Supply Piping
Pumped
Refrigerant
Return Piping
Liebert XD
Cooling Module *
* Liebert XDCF,
Liebert XDH, Liebert
XDO or Liebert XDV
Liebert XD
Cooling Module *
Liebert
XDP
Pumped
Refrigerant
14
Download from Www.Somanuals.com. All Manuals Search And Download.
Piping
5.3
Connection Methods and Points
Refer to site specific drawings for general locations of the piping connections. For Liebert XDH con-
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.
Supply piping connection is 1/2" OD copper pipe, and return piping connection is 7/8" OD copper. Both
supply and return fittings may be supplied with optional one-shot connections. These fittings contain
pressurized R-134a refrigerant inside the Liebert XDH.
The Liebert XDH has supply and return piping access on the top of each module.
Figure 15 Hard pipe connection diagram
Return Main
(seen from end )
2-1/8" O.D.
Recommended Arc
or 2-5/8" O.D.
Acceptable Arc
Supply Main
(seen from end )
1-1/8" O.D.
or 1-3/8" O.D.
7/8” Refrigerant-Grade
Full-Port Ball Valve
Field-Supplied and
Field-Installed
1/2” Refrigerant-Grade
Full-Port Ball Valve
Field-Supplied and
Field- Installed
Copper Tubing
Total length of each
line from Liebert XDH
to Main; not to exceed
72" (1829mm)
Supply
to Cooling
Return from
Refer to Table 2 for details.
Module
Cooling Module
Top of
Liebert XDH
Rear of
Liebert XDH
15
Download from Www.Somanuals.com. All Manuals Search And Download.
Piping
5.4
Piping Considerations—Hard-Piped Connections
Refrigerant enters and exits the Liebert XDH through connections on the top of the unit (see
The supply piping for each refrigeration circuit is 1/2" OD copper pipe. The return piping for each cir-
cuit is 7/8" OD copper. Each Liebert XDH has two supply connections and two return connections, one
for each refrigeration circuit.
The Liebert XDH units that are intended for hard-piping connections will have copper caps soldered
in place and a holding charge of nitrogen.
Figure 16 Supply and return—hard-piping connections
Top of Liebert XDH
6"
(153mm)
3-5/8"
(92mm)
1/2" Supply, Upper
Refrigeration Circuit
7/8" Return, Upper
Refrigeration
Circuit
1-3/8" (35mm)
Detail “A”
2-1/8"
(54mm)
4-1/8"
(105mm)
5"
(127mm)
Rear of
Liebert XDH
Rear of Liebert XDH
7/8" Return, Lower
Refrigeration Circuit
1/2" Supply, Lower
Refrigeration Circuit
Detail "A"
5.4.1 Venting the Holding Charge and Connecting to Mains
After the piping for the supply and return mains has been installed, the Liebert XDH units may be
connected. The Liebert XDH is shipped with a low-pressure holding charge (about 30 psi) of nitrogen to
prevent oxidation and moisture. Holding charges must be vented from the upper refrigeration circuit and
from the lower refrigeration circuit.
To vent the holding charge:
1. Find the four Schrader valves that retain the nitrogen holding charge in the Liebert XDH. The
valves are inside the rear door, one on each supply line and one on each return line. Three are
near the top of the Liebert XDH; one Schrader valve is in the bottom half of the Liebert XDH.
2. Vent the holding charge in the upper refrigeration circuit by depressing the pin in a Schrader
valve on either the supply or return line for that circuit. (The upper circuit’s lines are on the left
side of the unit.)
3. Replace and secure the cap on the Schrader valve that was opened.
4. Vent the holding charge in the lower refrigeration circuit by depressing the pin in a Schrader
valve on either the supply or return line for that circuit. (The lower circuit’s lines are on the right
side of the unit.)
5. Replace and secure the cap on the Schrader valve that was opened.
6. Use a torch to unsweat the caps on unit’s piping connections.
Preparations for precautions about connecting the Liebert XDH to the piping mains.
16
Download from Www.Somanuals.com. All Manuals Search And Download.
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.
During brazing, the lines must be filled with flowing dry nitrogen to prevent excessive oxidation and
scale formation inside the piping. Prevailing good refrigeration practices must be employed for piping
supports, leak testing, dehydration and charging. Failure to use good system practices may result in
damage to the system. Refer to the ASHRAE refrigeration handbook for general good-practice refrig-
eration.
5.5
Connection Methods for Hard Pipe
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.
5.6
Recommended Piping Size
Connect the main pipes between the Liebert XDH branch piping and the Liebert XDP or Liebert XDC
Table 2
Branch piping sizes for pumped refrigerant loop
Pipe Function
Size / Equivalent Pipe Length
1/2" OD (0.430" ID) for lengths up to 10 feet (3m)
From Liebert XDH supply to supply line of
Liebert XDP/Liebert XDC
7/8" OD(0.545" ID) for lengths over 10 feet but less than 25 feet (3-7.6m)
7/8" OD(0.545" ID) for lengths up to 10 feet (3m)
From Liebert XDH return to return line of
Liebert XDP/Liebert XDC
1-1/8" OD(1.025" ID) for lengths over 10 but less than 25 feet (3-7.6m)
NOTE
To minimize the amount of pumped refrigerant required, do NOT oversize the piping.
5.6.1 Connecting Methods—One-Shot Connections
CAUTION
!
Risk of sudden refrigerant discharge. Can cause loss of charge and minor injury.
If the optional precharged option is chosen, the Liebert XDH is shipped with a full charge of
R-134a refrigerant under pressure. Do not remove the pipe caps or plugs before the unit is
ready for connection to Liebert XD Piping.
Supply and return fittings on the precharged Liebert XDH units are one-shot connections. Do
not disconnect one-shot connections after they have been connected. Disconnection will
release pressurized R-134a refrigerant from the Liebert XDH.
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.
Both supply and return fittings may be supplied with optional, one-shot connections. These fittings
contain pressurized R-134a refrigerant inside the Liebert XDH.
17
Download from Www.Somanuals.com. All Manuals Search And Download.
Piping
Figure 17 Piping location and connecting sizes for pre-charged units
6"
(153mm)
3-5/8"
(92mm)
1/2" Supply, Upper
Refrigeration Circuit
7/8" Return, 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
1/2" Supply, Lower
Refrigeration Circuit
5.7
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, 1.8,2.4 and 3 meters).
Connection style to the unit end may be straight or 90 degrees. Connection to the prefab piping
assembly is a threaded coupler. For data on acquiring the correct kit for your installation, see
Figure 18 Liebert XD Flex Pipe dimensions—straight and 90-degree connections
Connection
to Prefabricated
Piping assembly
Connection
to Prefabricated
Piping assembly
90-Degree
Connection
Length
4, 6, 8 or 10 feet
(1.2, 1.8, 2.4 or 3 meters)
Length
4, 6, 8 or 10 feet
(1.2, 1.8, 2.4 or 3 meters)
Straight Connection
90° Connection to Liebert XD Cooling Unit
(One-Shot Coupling)
Connection to Liebert XD Cooling Unit
(One-Shot Coupling)
DPN000780
Pg. 1, Rev. 1
DPN000780
Pg. 2, Rev. 1
18
Download from Www.Somanuals.com. All Manuals Search And Download.
Piping
5.8
Connecting Liebert XD Flex Pipes to Liebert XDH Modules
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.
1. Remove the caps on the supply and return lines on the top of the Liebert XDH.
2. Lubricate the threads, diaphragm and O-ring with one or two drops of mineral oil.
3. Connect the line-set coupling finger-tight.
4. Make sure the Schrader valve is properly oriented; refer to the label on the top of the Liebert
XDH.
5. Hold the backup hex nut with a wrench while tightening the swivel nut.
6. Tighten the swivel nut on the female coupling until it is seated or a definite resistance is felt.
7. Once a definite bottoming resistance is felt (as in metal to metal), place a mark lengthwise from
the swivel nut to the backup hex and tighten the swivel nut on the female coupling an additional
1/4 turn.
8. Tighten the supply fittings to 35-45ft/lb (47-61Nm).
9. Tighten the return fittings to 55-65ft/lb (74-88Nm).
10. Mark the female and male coupler with for future reference.
5.8.1 Header System
The Liebert XDH module system with optional flexible piping requires use of the Liebert XD prefabri-
cated piping assembly. The prefabricated piping is compatible with the Liebert XD Flex Pipe required
to attach to the Liebert XDH modules. For the details on piping connection locations, see Figure 16.
For additional information, refer to the Liebert X-treme Density System Design Manual, SL-16655.
5.9
Connecting a Liebert XDH with Liebert XD Flex Pipe to an Operational Liebert XD
System
NOTE
Before connecting the Liebert XDH with Liebert XD Flex Pipe to the prefabricated piping
mains, check the entire system for leaks.
Check the holding charge in the Liebert XDH to ensure that the unit has no leaks.
Read all instructions before beginning installation.
Tools Required
• Two adjustable wrenches, with a maximum adjustment size of 2-1/2 inches
• Screwdriver, Phillips or blade type
NOTE
This operation requires two people.
1. Determine the port location of the supply and return piping overhead
2. Make sure the service valve for each port is closed
3. Remove cap for only the required ports. Do not remove caps from the unused ports.
4. Once Step 3 has been completed, remove the pipe plugs that are supplied on the Liebert XD Flex
Pipe.
5. Use system refrigerant to lubricate the face of the male coupling half, including the poppet valve
face and the stainless steel delta ring.
19
Download from Www.Somanuals.com. All Manuals Search And Download.
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.
NOTICE
Do not overtighten the couplers. Overtightening of couplers will damage the couplers.
Figure 20 Detail view of Liebert XD Flex Pipe and prefabricated piping port
Service Valve
Note:
Make sure the valve
is closed before attaching
Liebert Flex Pipe to the system.
Supply Side Torque Range for
1/2" coupler is 22.1 to 25.8 lb/ft (30-35Nm)
Tighten collar
with wrench.
DO NOT
Return Side Torque Range for
1" coupler is 59 to 62.7 lb/ft (80-85Nm)
OVERTIGHTEN!
Hold threaded coupler here
with a wrench to keep the
pipe stationary while tightening
collar with another wrench.
Liebert Flex Pipe
9. Once the supply and return connections are completed, open the return service valves, then open
the supply service valves.
20
Download from Www.Somanuals.com. All Manuals Search And Download.
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.
Do not disconnect threaded refrigerant couplers at the unit cabinet end without relieving
system pressure. Reclaim any refrigerant during removal of unit from system.
NOTICE
Before uninstalling a Liebert XDH with Liebert Flex Pipe from the prefabricated piping
mains: Close the supply service valve, wait approximately two minutes, then close the return
service valve.
Read all instructions before beginning.
Tools Required
• Two adjustable wrenches, maximum adjustment size of 2-1/2 inches
• Phillips head #2 screwdriver
1. Close the service valves in the supply line to the Liebert XDH (smaller couplers).
2. Close the service valves in the return lines to the Liebert XDH (larger couplers).
3. Locate and have ready the caps and plugs for both ends of the supply and return couplers.
4. Loosen the female supply couplers from the male supply couplers (smaller couplers). This
5. The Liebert XDH side of the female couplers must be held stationary while the collars on the
6. Disconnect the couplers.
21
Download from Www.Somanuals.com. All Manuals Search And Download.
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.
CAUTION
!
Risk of tubing kinks. Can cause permanent damage to the Liebert XD Flex Pipes.
Do not fold or bend Liebert XD Flex Pipe.
5.11 Insulation
To minimize the possibility of condensation, insulate all piping between the Liebert XDH and the Lie-
bert XDP or Liebert XDC.
22
Download from Www.Somanuals.com. All Manuals Search And Download.
Electrical
6.0 ELECTRICAL
The unit must be installed in accordance with national wiring regulations. Refer to the unit’s serial
WARNING
!
Risk of electric shock. Can cause death or injury.
Disconnect both electric power cords before working within the unit.
6.1
Connecting High Voltage Wiring
The Liebert XDH requires single-phase power for normal operation. The unit ships with two power
cords, each 10 feet (3m) long with NEMA 5-15 plugs, which connect to common, three-prong outlets
The XDH will function properly with only one power cord. The second power cord permits connection
to a separate power source to increase reliability—If one power source fails, the cord connected to the
remaining, live power source will power both banks of fans.
To attach the power cords, clip the plastic hangers attaching the cords to the Liebert XDH. Press the
appropriate end of each cord onto the electrical inlet. Attach the strain-relievers onto the power cords
and press the assemblies into the cable exit slots.
Figure 24 Liebert XDH electrical connections
60Hz MODELS ONLY
Field wiring connections
at terminal strip to be NEC
Class 2. Use switch contacts
with 75VA minimum rating.
50Hz MODELS ONLY
Field wiring connections
at terminal strip for safety extra
low voltage circuits only. Use
switch contacts rated 75VA
minimum, 24VAC maximum.
IEC Primary
Power Inlet
IEC Secondary
Power Inlet
Condensate Detection
Dry Contacts-Low Voltage
Connections
(Upper Circuit 84, 85)
Condensate Detection
Dry Contacts-Low Voltage
Connections
(Lower Circuit 82, 83)
Rear of Liebert XDH
Panel Removed for Clarity
Power Cord Strain Relievers
23
Download from Www.Somanuals.com. All Manuals Search And Download.
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 . For location of the entry points for the condensate detection wiring, see
For units equipped with condensate detection, make low voltage connections according to site-specific
drawings.
™
The Liebert Liqui-tect condensate detection unit is available only as a factory-installed option.
Figure 25 Condensate wiring entry points
Top of
Liebert XDH
Detail
Area
Rear of Liebert XDH
Condensate
Detection
Wiring Ports
24
Download from Www.Somanuals.com. All Manuals Search And Download.
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. Low voltage wiring to optional condensate detection on the Liebert XDH.
___ 6. Piping from Liebert XDP to Liebert XDH, with isolation valves piped to each Liebert XDH.
___ 7. Piping insulated.
___ 9. Shut down the Liebert XDH.
7.2
Charging with Refrigerant and Starting the Liebert XD System
The Liebert XD System must be completely installed before it is charged with refrigerant. After
installation is complete, refer to the Liebert XDP or Liebert XDC user manual for instructions on
charging the Liebert XDH with refrigerant and starting the system. The complete Liebert XD system
includes all Liebert XDH, XDO and XDV units, a Liebert XDC or Liebert XDP unit and any other
connected equipment.
25
Download from Www.Somanuals.com. All Manuals Search And Download.
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.
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.
At least one of the Liebert XDH’s banks of fans must be operating at all times that the Liebert
XDP or Liebert XDC is operating. Operating either the Liebert XDP or the Liebert XDC without
at least one of the Liebert XDH’s banks of fans rotating may cause a system malfunction.
Figure 26 Fan switches
Upper Fan Bank Switch
Lower Fan Bank Switch
8.1
Start the Liebert XDH
The Liebert XDH’s fans must be on before starting the Liebert XDP or Liebert XDC that will supply
refrigerant to the Liebert XDHs.
To start the Liebert XDH, press either of the rocker switches to turn on one or both of the Liebert
XDH’s banks of fans. Pressing the left switch starts the fans in the upper half of the Liebert XDH; the
right switch, the lower fans.
The refrigerant sources, either Liebert XDP or Liebert XDC, must be started separately.
26
Download from Www.Somanuals.com. All Manuals Search And Download.
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. Disconnect both power cords from the electrical
supply outlets or from the receptacles on the back of the Liebert XDH before working within.
The conditions required for sensitive electronic equipment should preclude the accumulation of appre-
ciable amounts of dust in the Liebert XDH. Most of that small amount should be found on the coils,
which are accessible by opening the rear door of the unit. The fans, on the front may be cleaned by
removing the front grilles, which are secured with snap-on connections.
The rear door and the fan tray on the front of the Liebert XDH are easily removed for maintenance. (A
wiring diagram is provided on the center shelf.)
9.2
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 requires operators to use use all measures that are technically feasible and do
not entail disproportionate cost to prevent leakage of these gases, to test for leakage regularly and to
recover f-gas during equipment service and maintenance and before disposing of equipment.
Refer to the full regulation for additional details.
27
Download from Www.Somanuals.com. All Manuals Search And Download.
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.
1. Ensure that all electrical power to the Liebert XDH has been shut off before beginning to remove
the fan tray.
3. Lift the tray out of the unit to install the new tray.
Reverse the steps above to install a new fan tray. Be certain to align the connectors, including the
electricity connector, when installing the new fan tray.
Figure 27 Remove fan tray
Remove four bolts
securing the fan tray
to the front of the XDH
28
Download from Www.Somanuals.com. All Manuals Search And Download.
Specifications
10.0 SPECIFICATIONS
Table 3
Liebert XDH specifications
XDH20DKP-0
XDH20DK--0
XDH20BKP-0
XDH20BK--0
XDH20DKPE0
XDH20DK-E0
XDH20BKPE0
XDH20BK-E0
(60Hz)
XDH32DKP-0
XDH32DK--0
XDH32BKP-0
XDH32BK--0
XDH32DKPE0
XDH32DK-E0
XDH32BKPE0
XDH32BK-E0
(60Hz)
XDH20DSP-0
XDH20DS--0
XDH20BSP-0
XDH20BS--0
XDH20DSPE0
XDH20DS-E0
XDH20BSPE0
XDH20BS-E0
(50/60Hz)
XDH32DSP-0
XDH32DS--0
XDH32BSP-0
XDH32BS--0
XDH32DSPE0
XDH32DS-E0
XDH32BSPE0
XDH32BS-E0
(50/60Hz)
Models
XDH20, 60Hz Nominal (98ºF [37°C] EAT): 22kW/6.3 Tons
XDH20, 60Hz Maximum(105ºF [40°C] EAT): 25.5kW/7.3 Tons
XDH20, 50Hz Nominal (98ºF [37°C] EAT): 19kW / 5.4 Tons
XDH20, 50Hz Maximum(116ºF [47°C] EAT): 25.5kW/7.3 Tons
Cooling Capacity
XDH32, 60Hz Nominal (98ºF [37°C] EAT): 30kW/8.5 Tons
XDH32, 60Hz Maximum(105ºF [40°C] EAT): 34.5kW/7.3 Tons
XDH32, 50Hz Nominal (98ºF [37°C] EAT): 27kW / 7.7 Tons
XDH32, 50Hz Maximum(108ºF [42°C] EAT): 34.5kW/7.3 Tons
Capacity rating is @ 55ºF (13ºC) Entering Fluid Temperature and 50ºF (10ºC) or lower dew
point
Conditions
Electrical Requirements
Input
220-240V-1ph-50Hz, CE /
120V-1ph-60Hz
208-240V-1ph-60Hz, CSA
Two IEC320-C14 power inlets and two IEC
power cords with NEMA 5-15P connectors
Two IEC320-C14 power inlets and two IEC
power cords with IEC320-C14 receptacles
Input Power Connections
Full Load Amps
5
10
2.5
5
Power Consumption,
Nominal, Watts
600
1200
575
1150
Dimensions, inches (mm)
Height—Unit Only
78 (1981)
80 (2032)
Height—Including
Pipe Connections
Width
Depth
12 (305)
42 (1067)
Weight, lb (kg)
Unit Only
233 (106)
317 (144)
246 (112)
330 (150)
233 (106)
317 (144)
246 (112)
330 (150)
Shipping Weight
6
Number of Fans
Airflow, Nominal,
ft /min (m /hr)
2500 (4248)
81 dBa
4000 (6796)
86 dBa
2428 (4125)
81 dBa
3850 (6541)
86 dBa
3
3
Audible Noise,
Sound Power
Pipe Connections
Refrigerant Supply
Refrigerant Return
Serviceable Parts
1/2" OD, Cu (optional 1/2" threaded one-shot coupling on the unit)
7/8" OD, Cu (optional 7/8" threaded one-shot coupling on the unit)
Fans and electrical components
Cabinet Exterior Finish
Black, matte finish, heat-fused powder coat
Condensate Sensing (factory-installed)
Dry contact outgoing signal (24VAC - 1A maximum)
Options
One-shot style flex pipe connections
Uni-directional or bi-directional air diffusers
Agency
Approvals
CSA 60Hz
CE 50Hz, CSA 50/60Hz
29
Download from Www.Somanuals.com. All Manuals Search And Download.
Specifications
Table 4
Liebert XD Flex Pipe assemblies, supply and return
Minimum Bend Radius
inches (mm)
Liebert P/N
Straight Connection
Assembly
Liebert P/N
90-Degree Connection
Assembly
Length
ft (m)
Description
Supply
Return
186566G1
186566G2
186566G3
186566G4
186565G1
186565G2
186565G3
186565G4
6 (1.8)
10 (3.0)
8 (2.5)
4 (1.2)
Liebert XD Flex
Pipe Kit
7 (178)
9 (229)
30
Download from Www.Somanuals.com. All Manuals Search And Download.
Download from Www.Somanuals.com. All Manuals Search And Download.
Ensuring The High Availability
Of Mission-Critical Data And Applications.
Technical Support / Service
Web Site
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. Enterprises benefit
from greater IT system availability, operational flexibility and
reduced capital equipment and operating costs.
Monitoring
800-222-5877
Outside the US: 614-841-6755
Single-Phase UPS
800-222-5877
Outside the US: 614-841-6755
Three-Phase UPS
800-543-2378
Environmental Systems
800-543-2778
Outside the United States
614-888-0246
Locations
United States
1050 Dearborn Drive
P.O. Box 29186
Columbus, OH 43229
Europe
Via Leonardo Da Vinci 8
Zona Industriale Tognana
35028 Piove Di Sacco (PD) Italy
+39 049 9719 111
Fax: +39 049 5841 257
Asia
7/F, Dah Sing Financial Centre
108 Gloucester Road, Wanchai
Hong Kong
While every precaution has been taken to ensure the accuracy
and completeness of this literature, Liebert Corporation assumes no
responsibility and disclaims all liability for damages resulting from use of
this information or for any errors or omissions.
© 2008 Liebert Corporation
All rights reserved throughout the world. Specifications subject to change
without notice.
852 2572220
Fax: 852 28029250
® Liebert is a registered trademark of Liebert Corporation.
All names referred to are trademarks
or registered trademarks of their respective owners.
SL-17210_REV08_05-08
Emerson Network Power.
The global leader in enabling Business-Critical Continuity.
EmersonNetworkPower.com
AC Power
Connectivity
DC Power
Embedded Computing
Embedded Power
Monitoring
Outside Plant
Racks & Integrated Cabinets
Power Switching & Controls
Services
Precision Cooling
Surge Protection
Business-Critical Continuity, Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co.
©2008 Emerson Electric Co.
Download from Www.Somanuals.com. All Manuals Search And Download.
|