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Liebert
®
XDH
™
User Manual - 50 & 60Hz
Precision Cooling
For Business-Critical Continuity™
G
ENERAL
S
AFETY
G
UIDELINES
!
!
WARNING
Risk of top-heavy unit falling over. Can cause death or injury.
Improper handling can cause equipment damage, injury, or death. Read all of the following instructions before attempting to move, lift, remove packaging from the unit, or preparing unit for installation.
WARNING
Risk of explosive discharge. Can cause death or injury.
This unit contains fluids and/or gases under high pressure. Relieve system pressure before cutting into or disconnecting piping or piping components.
!
!
!
!
!
WARNING
Risk of high-speed moving parts. Can cause death or injury.
Disconnect all local and remote electric power supplies before working in the unit.
WARNING
Risk of electric shock. Can cause death or injury.
Disconnect both power cords from the electrical supply outlets or from the receptacles on the back of the unit before working within.
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 improper operation and overpressurization. Can result in injury or property damage.
Only qualified personnel trained in HVAC installation or service should install or service this equipment.
Read all installation, operating and safety instructions before proceeding.
Fluorinated Greenhouse Gas Requirements—European Union
Stationary air conditioning, refrigeration, heat pump equipments and stationary fire protection systems in the European Community market and operating with fluorinated greenhouse gases (f-gas), such as R407C, R134a, R410A, must comply with the F-Gas Regulation: (EC) No. 842/2006 (F-gas).
The regulation prohibits, among other actions, venting fluorinated greenhouse gases to the atmosphere.
The F-Gas Regulation also 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.
TABLE OF CONTENTS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Venting the Holding Charge for Hard-Piped and Removable Liebert XD Flex Pipe
Connecting Methods—One-Shot Connections for Pre-Charged Refrigerant Option . . . . . . . 19
Connect Liebert XD Flex Pipe with Removable Coupling to a Liebert XD Cooling
Connect a Liebert XDH with Liebert Flex Pipe to an Operational Liebert XD System. . . . . 22
Disconnect a Liebert XDH With Liebert Flex Pipe from a Liebert XD System . . . . . . . . . . . 26
5.6
i
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
Connecting Low-Voltage Wiring—Standard Liebert XDH Modules . . . . . . . . . . . . . . . . . . . 30
Connecting Low-Voltage Wiring—Liebert XDH Smart Modules . . . . . . . . . . . . . . . . . . . . . 30
. . . . . . . . . . . . . . . . . . . . . . .31
ii
FIGURES
Figure 1
iii
TABLES
Table 1
Torque and wrench size for connecting Liebert XDH with one-shot couplers to Liebert
iv
Liebert XDH Component Locations and Model Number Nomenclature
1.0
L
IEBERT
XDH C
OMPONENT
L
OCATIONS AND
M
ODEL
N
UMBER
N
OMENCLATURE
Figure 1 Liebert XDH component locations
6
8 9
7
FRONT
1
2
5
FRONT
3, 4
10
12
REAR
11
10
13
12
14
REAR
16
17
REAR
18
20
REAR
15
19
1. Removable Fan Tray
2. Evaporator Fans
3. Switch Cover
4. On/Off Switch - Liebert XDH Standard
5. Circuit Breaker - Liebert XDH Standard
6. Return Line - Bottom Circuit
7. Return Line - Top Circuit
8. Supply Line - Bottom Circuit
9. Supply Line - Top Circuit
10. Evaporator Coils
11. Serial Tag
12. Quarter-Turn Fasteners
13. Rear Panel
14. Optional Condensate
Detection - Liebert XDH Standard
(Discontinued April 2009)
FRONT
19
15. IEC Primary and Secondary
Power Inlets - Liebert XDH Standard
16. Low-Voltage Terminal
Block - Liebert XDH Standard Module
• Condensate Detection
• Remote Shutdown
• Fan Failure Alarm
17. IEC Primary and Secondary
Power Inlets - Liebert XDH Smart Module
18. Circuit Breakers - Liebert XDH Smart Modules
19. On/Off Push Button Switch - Liebert XDH
Smart Modules
20. LEDs - Liebert XDH Smart Modules
1
Liebert XDH Component Locations and Model Number Nomenclature
Figure 2 Liebert XDH model number nomenclature
XD H 32
Example: XDH32BK— —*
B K — — *
Liebert
X-treme Heat
Density System
20 = Model Size
32 = Model Size
Horizontal Row Cooler
B = Base unit
K = 120V-1ph-60Hz
S = 208-240-1ph-60Hz
220-240-1ph-50Hz
D = Condensate Detection
(Discontinued April 2009)
S = Smart Module
— = Domestic Packaging
E = Export Packaging
— = Hard Piped
P = Pre-Charged One-Shot Coupling
R = Removable Coupling
Revision Level
2
Introduction
2.0
I
NTRODUCTION
2.1
References
This document must be used together with site specific documentation and documentation for other parts of the system.
2.2
Pre-Installation Checks
• Verify that the Liebert XDH voltage matches the available utility power. The serial tag with this information is accessible by removing the Liebert XDH’s rear panel. 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 Emerson representative.
2.3
Packing List
• User manual (this document)
• Liebert XDH module
• Power cords
• Shipping/floor mounting brackets
• Tie-down bracket assembly
• Diffusers (top and bottom)
2.4
Installation Considerations
The Liebert XDH is designed for placement within a row of computer cabinets in the data center in a hot-aisle-cold-aisle arrangement. The Liebert XDH is 12" (305mm) wide, so it takes up little space.
For installation arrangement, see 4.3 - Installing the Liebert XDH Within the Enclosure Row.
Be sure to follow all applicable codes.
Determine whether the Liebert XDH includes the condensate detection option (factory-installed; discontinued April 2009) or the smart module control board (factory-installed). Each of these options requires separate low-voltage connections to a monitoring unit. To minimize the possibility of condensation, 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, Emerson recommends using uni-directional air diffusers to direct cooling air into the cold aisle, toward the equipment racks. If the Liebert XDH is installed between racks within a row, Emerson recommends using bi-directional air diffusers, directing the cooling air toward the equipment racks on either side of the Liebert XDH.
Table 1 Application limits
Input Voltage
Minimum Maximum
-10% +10%
Range of Return Air Conditions to Unit
Dry Bulb Temperature Relative Humidity
60° to 100°F (16° to 38°C) 20% to 80%
2.4.1 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
General product information
3.0
G
ENERAL 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 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. 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 in a diffuse pattern. The cooling air is then drawn into the enclosures to cool the equipment.
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. Unidirectional and bidirectional 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.
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 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 conditions. The dual refrigeration circuits permits interlaced connection of two Liebert XD refrigerant sources to enhance system reliability. The Liebert XDH may be installed in a Liebert XD piping system that includes other Liebert XD cooling modules.
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 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 no longer available as options (discontinued April 2009). 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.
Optional smart modules allow remote shutdown, fan failure alarms, condensate detection and switching fan per bank On and Off. This saves energy by permitting the unit to run with two fans per bank and switching on the middle when the temperature requires all fans for cooling.
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 Generic piping layout
Liebert XDC or
Liebert XDP
Pumped
Refrigerant
Liebert XD
Cooling Module *
Liebert XD
Cooling Module *
Supply Lines
(2 per unit)
Return Lines
(2 per unit)
Liebert XDC or
Liebert XDP
Pumped
Refrigerant
Liebert XD
Cooling Module *
Liebert XD
Cooling Module *
* Liebert XDCF
Liebert XDH
Liebert XDO
Liebert XDR or
Liebert XDV
4
General product information
3.2
Checking and Unpacking
Upon arrival of the unit and before unpacking, verify that the labeled equipment matches the bill of lading. Carefully 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 Emerson or to your sales representative. If you later find any concealed damage, report it to both the shipping company and your local Emerson representative.
Check to be sure all required assemblies and parts have been received.
The Liebert XDH is shipped in protective packaging and secured to a pallet (see Figure 5). Do not
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.
3.2.1 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 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.
NOTICE
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.
NOTICE
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.
NOTICE
Risk of improper storage. Can cause unit damage.
Keep the unit indoors and protected from dampness, freezing temperatures and contact damage.
Figure 4 Recommended unit handling equipment
Forklift
5
Pallet Jack
General product information
3.2.2 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.
• Emerson 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. Emerson 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.
3.2.3 Unpacking the Unit
Domestic Packaging
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 domestic shipping packaging
Exterior stretch wrapping surrounds other protective shipping features
Planks at the corners and on the sides protect the Liebert
XDH during shipping
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
General product information
3.2.4 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. Emerson 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.
1. Locate the ramp that was shipped with the Liebert XDH (see Figure 5).
2. Loosen the hex screw on the ramp and remove the metal bracket (see Figure 6).
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
6. Insert the opposite end of the metal bracket under the hex screws on the skid. (see Figure 7)
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
Figure 7 Attaching ramp, removing the Liebert XDH from pallet
General product information
Tie-Down Bracket
(removed from pallet)
Bracket installed, securing ramp to shipping pallet
Lag screw - 1 of 6
8
Mechanical Considerations
4.0
M
ECHANICAL
C
ONSIDERATIONS
4.1
Liebert XDH Dimensions
Figure 8 Liebert XDH dimensions
12"
(305mm)
80"
(2032mm)
78"
(1981mm)
FRONT
42
(1067mm)
FRONT
4.2
Determining Placement in the Conditioned Space
Refer to site-specific drawings for exact spacing. 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.
9
Mechanical Considerations
4.3
Installing the Liebert XDH Within the Enclosure Row
Built-in casters allow rolling the Liebert XDH into position for installation. Stabilizers reduce the likelihood 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.
Figure 9 Caster and stabilizer location
FRONT
(Bottom View)
Casters
(one at each corner)
Stabilizers
(one at each corner)
Adjustable Foot
(one at each corner)
4.3.1 Install a Tie-down Bracket—Optional
An optional tie-down bracket may be installed on the Liebert XDH to secure it in the row. The bracket keeps space between the Liebert XDH and adjacent equipment constant, preventing vibration.
What’s Included
• Bracket: two-piece assembly
• M6 Bolt: 1
• M6 Nut: 1
• Washer: 1
• Self-tapping screws: 4
Tools Required
• Screw Driver: Phillips #2 Bit
• Drill
• Drill Bit: 1/8" diameter
• Adjustable wrench
10
Mechanical Considerations
To install the tie-down bracket:
1. Insert the M6 bolt through the longest slot in the tie-down bracket as shown in Figure 10.
2. Secure the tie-down bracket loosely with the washer and M6 nut.
3. Position the tie-down bracket on top of the Liebert XDH over the factory-fabricated holes and over
the top of the adjacent enclosure as shown in Figure 10.
4. Mark the places where two self-tapping screws will attach the tie-down bracket to the adjacent cabinet.
5. Taking proper precautions to collect the metal shavings and protect equipment, drill holes in the adjacent cabinet for the two screws.
6. Use a vacuum cleaner or other method to remove all metal particles.
7. Position the bracket over the holes in the Liebert XDH and the adjacent cabinet.
8. Insert and tighten the four screws.
9. Tighten the M6 nut securely.
Figure 10 Install tie-down bracket
Self-Tapping
Screws
Bracket
Assembly
TAKE CARE TO AVOID WIRING
AND EQUIPMENT WHEN DRILLING.
COLLECT AND DISPOSE
OF ALL METAL PARTICLES.
Drill holes for screws into top of adjacent enclosure.
Washer
M6 Nut
Self-Tapping
Screws
Install screws into holes
(factory-fabricated) in top of XDH Unit
11
Hot
Aisle
Cold
Aisle
Mechanical Considerations
4.3.2 Airflow Direction
If the Liebert XDH is installed at the end of a row, Emerson recommends using uni-directional air diffusers. The uni-directional diffusers are designed to blow cooling air to the left; the diffusers can be used for right air discharge by removing them from the Liebert XDH, turning them 180 degrees, then reattaching them to the Liebert XDH.
If the Liebert XDH is installed between racks, Emerson 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 diffuser 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.
See Install Air Diffusers for Best Airflow Direction on page 13.
Figure 11 Liebert XDH placement in enclosure row
Hot
Aisle
Cold
Aisle
X
D
H
12
Mechanical Considerations
Install Air Diffusers for Best Airflow Direction
1. Remove the top diffuser, Part # 186458, from its packaging.
2. Check the top diffuser’s fittings and insertion holes on the Liebert XDH to determine how the diffuser should be installed—the diffuser may be attached only one way on the top half of the
Liebert XDH.
3. Rotate the diffuser 180 degrees and press it against the lower half of the Liebert XDH until it
snaps into the fittings (see Figure 12).
The vanes in the diffuser now point in the opposite direction.
4. Repeat Steps 1 through 3 to install the bottom diffuser, Part # 186459, on the upper half of the
Liebert XDH.
Figure 12 Change airflow direction
Top Diffuser, Part # 186459, may be rotated180 degrees and installed on the lower half of the Liebert XDH
13
Piping
5.0
P
IPING
Refer to site-specific drawings for general locations of the piping connections. These drawings should specify where the piping connects to the Liebert XDH.
5.1
European Union Fluorinated Greenhouse Gas Requirements
Stationary air conditioning, refrigeration, heat pump equipments and stationary fire protection systems in the European Community market and operating with fluorinated greenhouse gases (f-gas), such as R407C, R134a, R410A, must comply with the F-Gas Regulation: (EC) No. 842/2006 (F-gas).
The regulation prohibits, among other actions, venting fluorinated greenhouse gases to the atmosphere.
The F-Gas Regulation requires operators to 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 13). In an interlaced configuration, half the
cooling units in an aisle are connected to one Liebert XDP or Liebert XDC and the other half in that aisle are connected to another Liebert XDP or Liebert XDC. Interlacing the connection piping will keep one of the Liebert XDH’s circuits operating and maintain even cooling 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
non-interlaced configuration (see Figure 14).
Figure 13 Typical Liebert XDH piping—interlaced connections
T = Top Circuit
B = Bottom Circuit
Liebert XDP /
Liebert XDC A
T
Liebert
XDH
Unit 1
B T
Liebert
XDH
Unit 2
B T
Liebert
XDH
Unit 3
B T
Liebert
XDH
Unit 4
B
Supply A
Return A
Return B
Supply B
Liebert XDP /
Liebert XDC B
Drawing is not to scale.
Line sizes do NOT indicate piping sizes.
Equipment racks not shown for
clarity. See Figure 11 for room
layout with Liebert XDH.
Top and bottom refrigerant circuits are separately connected to the Liebert XDP / Liebert XDC and can be alternated.
B T
Liebert
XDH
Unit 5
B T
Liebert
XDH
Unit 6
B T
Liebert
XDH
Unit 7
B T
Liebert
XDH
Unit 8
14
Piping
Figure 14 Typical Liebert XDH piping—non-interlaced connection
T = Top Circuit
B = Bottom Circuit
T
Liebert
XDH
Unit 1
B T
Liebert
XDH
Unit 2
B T
Liebert
XDH
Unit 3
B T
Liebert
XDH
Unit 4
B
Liebert XDP /
Liebert XDC A
Supply A
Return A
Return B
Supply B
Liebert XDP /
Liebert XDC B
Drawing is not to scale.
Line sizes do NOT indicate piping sizes.
Equipment racks not shown for
clarity. See Figure 11 for room
layout with Liebert XDH.
Top and bottom refrigerant circuits are separately connected to the Liebert XDP / Liebert XDC and can be alternated.
T B
Liebert
XDH
Unit 5
T B
Liebert
XDH
Unit 6
T B
Liebert
XDH
Unit 7
T B
Liebert
XDH
Unit 8
5.3
Connection Methods and Points
Refer to site specific drawings for general locations of the piping connections. For Liebert XDH con-
nection locations, refer also to Figure 15.
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. All piping must be ASTM Type “L” copper.
The Liebert XDH has supply and return piping access on the top of each module. Each Liebert XDH has two supply connections and two return connections, one set for each refrigerant circuit. Supply piping connection is 1/2" OD copper pipe, and return piping connection is 7/8" OD copper. The hardpiped XDH has a low-pressure nitrogen holding charge.
Both supply and return fittings may be supplied with optional one-shot connections. These fittings contain pressurized R-134a refrigerant inside the Liebert XDH.
For Liebert XDHs with removable connections, the supply piping connection is 1/2" OD and the return piping connection is 7/8" OD. Both the Liebert XDH and the Liebert XD Flex Pipe with removable connections have a low-pressure nitrogen holding charge.
15
Piping
5.4
Hard-Piped Connection Sizes
The supply piping for each refrigeration circuit is 1/2" OD copper pipe. The return piping for each circuit is 7/8" OD copper.
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 15 Supply and return—hard-piping connections
Top of Liebert XDH
Top View
6"
(152mm)
Detail “A”
7/8" Return, Upper
Refrigeration
Circuit
3-5/8" (92mm)
1/2" Supply, Upper
Refrigeration Circuit
1-3/8" (34mm)
2"
(51mm)
4-1/8"
(104mm)
5"
(126mm)
Rear of Liebert XDH
7/8" Return, Lower
Refrigeration Circuit
Detail "A"
1/2" Supply, Lower
Refrigeration Circuit
REAR
5.4.1 Venting the Holding Charge for Hard-Piped and Removable Liebert XD Flex Pipe
Connections
The Liebert XDH in hard-piped configuration is shipped with a low-pressure holding charge (about
30 psi) of nitrogen to prevent oxidation and moisture. This must be vented from the upper and lower refrigeration circuits before removing the copper caps.
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 circuits by depressing the pin in a Schrader valves on either the
supply or return line for each circuit (see Detail A in Figure 15).
3. Replace and secure the cap on the Schrader valve that was opened.
4. Use a torch to unsweat the caps on the unit’s piping connections.
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 refrigeration.
16
Piping
5.4.3 Recommended Piping Size
Connect the main pipes between the Liebert XDH branch piping and the Liebert XDP or Liebert XDC
according to Table 2. Elbows and restrictions must be minimized to ensure good fluid flow.
See Table 2 below for recommended pipe sizes and Figure 3 for piping segment locations.
Table 2 Branch piping sizes for pumped refrigerant loop
Pipe Function
From Liebert XDH supply to supply line of
Liebert XDP/Liebert XDC
From Liebert XDH return to return line of
Liebert XDP/Liebert XDC
Size / Equivalent Pipe Length
1/2" OD (0.430" ID) for lengths up to 10 feet (3m)
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)
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.
See Figure 15 for piping recommendations for hard-piping between the Liebert XDH and the header
system.
Figure 16 Hard pipe connection diagram
Return Main
(seen from end )
2-1/8" O.D.
or 2-5/8" O.D.
Acceptable Arc
Supply Main
(seen from end )
1-1/8" O.D.
or 1-3/8" O.D.
Recommended Arc
1/2” Refrigerant -Grade
Full-Port Ball Valve
Field-Supplied and
Field- Installed
7/8” Refrigerant-Grade
Full-Port Ball Valve
Field-Supplied and
Field-Installed
Supply to Cooling
Module
Copper Tubing
Total length of each line from Liebert XDH to Main; not to exceed
72" (1829 mm)
Return from
Cooling Module
Top of
Liebert XDH
Rear of
Liebert XDH
17
Piping
5.5
Field Installation of Liebert XD Flex Pipe Kit on the Liebert XDH
If you are performing a service installation or a field retrofit, skip this section and proceed with
instructions in 5.5.6 - Connect a Liebert XDH with Liebert Flex Pipe to an Operational Lie-
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 17 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)
Straight Connection
Length
4, 6, 8 or 10 feet
(1.2, 1.8, 2.4 or 3 meters)
Connection to XD Cooling Unit
DPN000780
90° Connection to XD Cooling Unit
DPN000780
18
Piping
5.5.1 Connecting Methods—One-Shot Connections for Pre-Charged Refrigerant Option
!
CAUTION
Risk of sudden refrigerant discharge. Can cause loss of charge and minor injury.
If the optional pre-charged 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 pre-charged 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.
Liebert XDHs with the pre-charged option are equipped with one-shot connections on the supply and return fittings. These contain a charge of R-134a refrigerant under pressure within the unit. This charge must not be vented.
Do not remove the pipe caps or plugs before the unit is ready for connection to Liebert XD Piping. Do not disconnect one-shot connections after they have been connected.
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.
Installation of Liebert XD Flex Pipe Kit on the Liebert XDH and see Figure 18.
If the unit does not include Liebert Flex Pipes, refer to 5.4.1 - Venting the Holding Charge for
Hard-Piped and Removable Liebert XD Flex Pipe Connections.
Figure 18 Piping location and connecting sizes for pre-charged units
Top View
6"
(152mm)
7/8" Return, Upper
Refrigeration
Circuit
3-5/8" (92mm)
1/2" Supply, Upper
Refrigeration Circuit
1-3/8" (34mm)
2"
(51mm)
4-1/8"
(104mm)
5"
(126mm)
7/8" Return, Lower
Refrigeration Circuit
Rear of Liebert XDH
1/2" Supply, Lower
Refrigeration Circuit
19
Piping
5.5.2 Connect a Liebert XDH with One-Shot Fittings to Liebert Flex Pipe
NOTICE
Risk of improper reuse of Liebert XD Flex Pipes with one-shot connections. Can cause refrigerant leaks.
Liebert XD Flex Pipes with one-shot connections must not be removed from the Liebert XDH unless they are being replaced with Liebert XD Flex Pipes with one-shot connections. Do not reuse Liebert XD Flex Pipes with one-shot connections. Reuse may result in refrigerant leaks
This operation must be performed on each of the two circuits in the Liebert XDH.
Tools Required
• Two adjustable wrenches with a maximum adjustment size of 2-1/2 inches
OR two open-end wrenches (see Table 3 for sizes)
• One torque wrench, half-inch drive (see Table 3 for sizes)
1. Remove the protector cap and plug from the connections and carefully wipe the fittings and threaded surfaces clean.
2. Use a small applicator brush saturated with refrigerant oil to lubricate the entire surface of the
diaphragm, the O-ring and the threaded area of male coupling assembly. Refer to Figure 19.
If refrigerant oil is not used, an alternate lubricant for this application is a refrigerant-compatible silicone grease product, such as Dow Corning DC200/60,000 cst.
3. Thread the coupling halves together by hand to ensure that the threads mate properly. Ensure that the Schrader valve is oriented so that it points to the rear of the Liebert XDH.
4. Tighten the coupling body hex nut and union nut with the proper-sized wrench until the coupling bodies bottom out or definite resistance is felt.
5. Use a marker or pen to draw a line lengthwise across the body hex nut and onto the union nut.
The line should parallel the refrigerant flow.
6. Tighten the nuts an additional quarter-turn, judging the amount by the mark drawn above.
7. If a torque wrench is used, Emerson recommends using the following torque values:
Table 3 Torque and wrench size for connecting Liebert XDH with one-shot couplers to Liebert
Flex Pipe
Coupling
Size
#10
#11
#12
Wrench Sizes, in. (mm)
Male Coupling Female Coupling
1-1/16 (26.98)
1-1/8 (28.57)
1-7/16 (36.51)
1-5/16 (33.33)
1-5/16 (46.55)
1-3/8 (34.9)
Torque, Female
Coupling Only, ft-lb (Nm)
35-45 (13.5- 16.2)
35-45 (47.5- 61.0)
50-60 (67.8- 88.1)
Figure 19 One-shot fittings: Liebert XDH and Liebert Flex Pipe
Oil Threads on
Male Coupling
On the
Liebert XD module
Male Coupler
Connection at Liebert XD
Cooling Module
Coupling Size
Marking of Lip of Coupler
On the Liebert XD
Flex Pipe one-shot coupling
Oil Rubber Seal and Face of Diaphragm
20
Piping
5.5.3 Connection Methods—Removable Connections
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, removable connections.
Figure 20 Piping location and connecting sizes for pre-charged units
Top View
6"
(152mm)
7/8" Return, Upper
Refrigeration
Circuit
3-5/8" (92mm)
1/2" Supply, Upper
Refrigeration Circuit
1-3/8" (34mm)
2"
(51mm)
4-1/8"
(104mm)
5"
(126mm)
Rear of Liebert XDH
7/8" Return, Lower
Refrigeration Circuit
1/2" Supply, Lower
Refrigeration Circuit
5.5.4 Connect Liebert XD Flex Pipe with Removable Coupling to a Liebert XD Cooling Module
Tools Required
• Two adjustable wrenches with a maximum adjustment size of 2-1/2 inches
OR two open-end wrenches (see Table 4 for sizes)
• One torque wrench, half-inch drive (see Table 4 for sizes)
1. Remove the protector cap and plug from the couplers on the Liebert XDH.
2. Wipe the fittings and threaded surfaces clean of particles and other foreign substances.
3. Place the Liebert Flex Pipe assembly against the fitting body so that the flat face of the flange comes into contact with the O-ring. The O-ring is on the front of the male fitting.
4. Tighten the coupling body hex nut and union nut with the proper-sized wrench until the coupling bodies bottom out or definite resistance is felt.
5. Use a marker or pen to draw a line lengthwise across the body hex nut and onto the union nut.
The line should parallel the refrigerant flow.
6. Tighten the nuts an additional quarter-turn, judging the amount by the mark drawn above.
7. If a torque wrench is used, the following torque values are recommended:
Table 4 Torque and wrench sizes for connecting Liebert Flex Pipe to the Liebert XDH with removable couplings
Fitting
Size
1/2"
5/8"
1"
Wrench Size, in. (mm)
Male Coupling Female Coupling
7/8 (22.23)
1-1/16 (26.98)
1-1/2 (38.1)
15/16 (23.81)
1-1/8 (23.58)
1-5/8 (41.28
Torque, Female
Coupling Only, ft-lb (Nm)
40 (55)
60 (80)
110 (150)
21
Piping
Figure 21 Removable couplings
On the Liebert
Flex Pipe
On the Liebert
XD Module
Removable Female
Coupler on the end of Liebert Flex Pipe
Oil Rubber O-Ring on
Face of Removable
Male Coupler at Liebert
XD Cooling Module
Table 5 O-ring part number
Liebert Part # Size, in.
192917P1
192917P2
192917P3
1/2
5/8
7/8
Fitting
FD57-1224-08-10
FD57-1224-10-11
FD57-1224-14-12
5.5.5 Header System
The Liebert XDH module system with optional flexible piping requires use of the Liebert XD prefabricated 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 15.
For additional information, refer to the Liebert X-treme Density System Design Manual, SL-16655, available at the Liebert Web site:
www.liebert.com
5.5.6 Connect a Liebert XDH with Liebert Flex Pipe to an Operational Liebert XD System
NOTE
Check the entire system for leaks before connecting the Liebert XDH with Liebert Flex Pipe to the prefabricated piping mains.
Read all instructions before beginning installation.
Tools Required
• One adjustable wrench with a maximum adjustment size of 2-1/2 inches
• One torque wrench, half-inch drive
• Crowsfoot (supplied with Liebert XDP and Liebert XDC)
NOTE
This operation requires two or more people.
22
Piping
5.5.7 Connect/Reconnect the Liebert Flex Pipe to the Header Assembly
NOTICE
Risk of improper reuse of Liebert XD Flex Pipes with one-shot connections. Can cause refrigerant leaks.
Liebert XD Flex Pipes with one-shot connections must not be removed from the Liebert XDH unless they are being replaced with Liebert XD Flex Pipes with one-shot connections. Do not reuse Liebert XD Flex Pipes with one-shot connections. Reuse may result in refrigerant leaks.
Tools Required
• One adjustable wrench with a maximum adjustment size of 2-1/2 inches
• One torque wrench, half-inch drive
• Crowsfoot (supplied with Liebert XDP and Liebert XDC)
NOTE
This operation requires two or more people.
Proper connection requires that both connections are clean and have been oiled. Proper torque must be applied.
1. Determine the port location of the supply and return piping overhead.
2. Make sure the service valve for each port is closed.
3. Skip this step if reconnecting Liebert XD Flex Pipes with one-shot connections. Remove caps from only the required ports. Do not remove caps from the unused ports.
4. Remove the pipe plugs that are supplied on the Liebert Flex Pipe on the Liebert XDH.
5. Inspect both halves of the fittings and remove any foreign contamination from the sealing surfaces and threads before connecting the fittings.
Figure 22 Liebert XD prefabricated piping assembly
Return
Main
Service Valve, typical
(all ports)
Supply
Main
Headers, Capped
Threaded Cap
(Typical)
Headers, Connected
6. Use mineral oil or polyol ester oil to lubricate the face of the poppet valve and the seal around the
poppet valve on the female connector (on the Liebert Flex Pipe) (see Figure 23).
7. Apply mineral oil or polyol ester oil to the stainless steel delta ring on the male connector (header
port connector) (see Figure 23).
23
Figure 23 Oil rings on header and Liebert Flex Pipe connectors
Oil
Applicator
Spout
Piping
Poppet Valve Face
Rubber Ring
Around Poppet
Valve Face
Stainless Steel Delta Ring on Header Port Connector
8. Thread the union nut of the female coupler onto the male coupler until they are hand tight.
9. Using the wrench arrangement shown in Figure 24, torque the couplers to the values in Table 6.
NOTICE
Table 6
Risk of improper tightening of soft metal fittings. May cause equipment damage.
It is imperative that the brass body of the female connector be held stationary while the fittings are being tightened. Failing to do so may damage the female connector.
Torque for connecting Liebert XD Flex Pipe to prefabricated piping
Coupler
Size
1/2"
3/4"
1"
Crowsfoot
Size, in. (mm)
1-3/16 (30)
1-5/8 (41)
1-31/32 (50)
Torque, ft-lb (Nm)
25.8 (30-35)
48.0 (60-65)
62.7 (80-85)
Figure 24 Wrench arrangement for tightening couplers
Crowsfoot
Wrench holding brass body of female connector stationary to prevent it from turning
Torque Wrench
24
Piping
Figure 25 Detail view of Liebert XD Flex Pipe and prefabricated piping port
Service Valve
Note: Make sure the valve is closed before attaching flex pipe to the system.
Tighten with torque wrench.
DO NOT
OVERTIGHTEN!
Flex Pipe
Hold threaded coupler here with a wrench to keep the brass body of of the female connector stationary while tightening collar with another wrench.
10. Repeat Steps 3 through 9 for the smaller coupler (supply line).
11. Once the supply and return connections are completed, check to make sure the Liebert XDH fan power switches are Off, then connect the power cords to their power sources.
12. Turn the fan switches on. Ensure that the fans operate.
13. Open the return service valve first, then open the supply service valve.
With the fans running, cool air is discharged from the front of the Liebert XDH.
Figure 26 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
25
Piping
5.5.8 Disconnect a Liebert XDH With Liebert 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.
NOTE
Before uninstalling a Liebert XDH with Liebert XD Flex Pipe from the prefabricated piping mains: With the fans running, close the supply service valve, wait approximately two minutes, then close the return service valve.
Read all instructions before beginning.
This operation must be performed on each of the two circuits in the Liebert XDH.
Tools Required
• One adjustable wrench with a maximum adjustment size of 2-1/2 inches
• One torque wrench, half-inch drive
• Crowsfoot (supplied with Liebert XDP and Liebert XDC)
1. Ensure the Liebert XDH fan switches are both On and the fans are operational.
2. Close the service valve in the supply line to the Liebert XDH (smaller coupler).
3. With the Liebert XDH fans running, wait two minutes.
4. Close the service valve in the return line to the Liebert XDH (larger coupler).
5. Turn the fan power switches to the Off position. Once the fan switches are turned Off, unplug the
power cords from their power source. See 6.0 - Electrical Connections for details.
6. Locate and have at the ready the caps and plugs for both ends of the supply and return couplers.
7. Loosen the female supply coupler from the male supply coupler (smaller coupler). This requires
an adjustable wrench and a torque wrench. Refer to Figure 24; use the torque values in Table 6
and on the label on top of the Liebert XDH (see Figure 27.
8. The Liebert XDH side of the female coupler must be held stationary while the collar on the coupler is being loosened.
9. Disconnect the coupler.
Figure 27 Profile view of the Liebert XD system and torque label location
Top of Liebert XDH
Piping
Connections
Service
Valve
Return
Line
Supply
Line
Torque Values on label
26
Piping
10. Place the protective dust cap and plug back onto both ends of the coupler on the Liebert XDH and the port pipe.
Figure 28 Piping mains without Liebert XDH and Liebert XD Flex Pipe
Dust cap and plug attach here
11. Repeat Steps 8 through 10 for the return couplers (larger couplers).
12. Lay the Liebert XD Flex Pipe aside where they will not be damaged.
NOTICE
Risk of permanent damage to the Liebert XD Flex Pipes. Do not fold or bend flex pipe tightly.
5.6
Insulation
To minimize the possibility of condensation, insulate all piping between the Liebert XDH and the Liebert XDP or Liebert XDC.
27
Electrical Connections
6.0
E
LECTRICAL
C
ONNECTIONS
The unit must be installed in accordance with national wiring regulations. Refer to the unit’s serial
tag for electrical requirements. Refer to Table 7 for details.
Replacement of any wiring or supply cord must be performed only by the manufacturer, the manufacturer’s service agent or a similarly qualified person.
!
WARNING
Risk of electric shock. Can cause death or injury.
Disconnect both electric power cords before working within the unit.
Figure 29 Electrical wiring entry points—high-voltage and low-voltage
Top of
Liebert XDH
Detail
Area
Rear of Liebert XDH
Low-Voltage
Wiring Ports
28
Electrical Connections
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. If only one power source is available, then only the power connection labeled "SECONDARY” should be connected.
to the power source.
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 30 Standard Liebert XDH electrical connections
Optional Condensate
Detection Dry Contacts - Low
Voltage 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.
Strain relief points for power cords
Rear Door and
Side Panel not shown for clarity
IEC Primary and Secondary
Power Inlets
DPN001180
Figure 31 Smart Liebert XDH electrical connections
Condensate Detection,
Remote Shutdown [37,38] and Alarm Relay Dry
Contacts/Low Voltage
Connections (82 thru 87).
Strain Relief Points for Power Cords
Primary and
Secondary
IEC Primary and Secondary
Circuit Breaker
Power Inlets
Bottom Half of the Liebert XDH_S
DPN001180
29
Electrical Connections
6.2
Connecting Low-Voltage Wiring—Standard Liebert XDH Modules
Low-voltage connections to the standard Liebert XDH are available only on units with the optional condensate detection feature (discontinued April 2009). The low voltage connections are on the bot-
monitoring unit, such as Liebert’s SiteScan
®
.
For units equipped with condensate detection (discontinued April 2009), make low voltage connections according to site-specific drawings. The unit must be installed in accordance with national wiring regulations.
6.3
Connecting Low-Voltage Wiring—Liebert XDH Smart Modules
Low-voltage connections are available only on the Liebert XD smart module. The low-voltage connections for Liebert XDH smart modules are in the rear of the units. There are two connection locations, one for the lower bank of fans and one for the upper bank of fans. The power connections are shown in
Figure 32; the communication ports are on the rear left side of the Liebert XDH.
These dry contacts can to be connected to a monitoring unit, such as Liebert’s SiteScan with national and local wiring regulations.
®
. Make connections on these units according to site-specific drawings. The unit must be installed in accordance
Terminal block connections 37, 38 and 82 through 87 can be connected to a monitoring unit, such as
Liebert’s SiteScan (Contacts 37 and 38 are for remote shutdown and 82 through 87 are for reporting alarms). P66 & P67 are CANbus ports.
Figure 32 Low-voltage connections—Liebert XDH smart module
Condensate Detection,
Remote Shutdown [37,38] and Alarm Relay Dry
Contacts/Low Voltage
Connections (82 thru 87).
Top Half of the XDH_S
Bottom Half of the XDH_S
DPN001180
30
Installation Checklist and System Fill for Startup
7.0
I
NSTALLATION
C
HECKLIST AND
S
YSTEM
F
ILL FOR
S
TARTUP
7.1
Checklist for Proper Installation
___ 1. The Liebert XDH module is properly mounted using tie-down brackets (see 4.3.1 - Install a
___ 2. Power cords connected to electrical supply.
___ 3. Low-voltage wiring to optional condensate detection on the Liebert XD modules (discontinued
April 2009) or the smart module control board.
___ 4. Piping from Liebert XDP/Liebert XDC to Liebert XD modules, with isolation valves piped to each Liebert XD module.
a. Hard-piped modules connected to overhead piping
OR b. Liebert XD Flex Pipe connections to header assembly
___ 5. Leak check.
___ 6. Start the Liebert XD module to ensure proper operation (see 8.1 - Start the Standard
___ 7. Shut down the Liebert XD module.
___ 8. Piping insulated.
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 XD modules with refrigerant and starting the system. The complete Liebert XD system includes all Liebert cooling modules, a Liebert XDC or Liebert XDP unit and any other connected equipment.
31
Operation
8.0
O
PERATION
The Liebert XDH’s controls are on the front of the unit at the Liebert XDH’s midline for easy access.
Each switch controls the operation of one bank of three fans (see Figure 33 for standard module,
reducing the airflow if the Liebert XDH’s full cooling capacity is not needed.
!
CAUTION
Risk of improper operation. Can cause equipment damage.
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.
8.1
Start the Standard Liebert XDH
At least one bank of the Liebert XDH’s fans must be On before starting the Liebert XDP or Liebert
XDC that will supply refrigerant to the Liebert XDH units.
To start the Liebert XDH:
1. Press either of the rocker switches to turn On one or both of the Liebert XDH’s banks of fans (see
Pressing the left switch starts the fans in the upper half of the Liebert XDH; the right switch, the lower fans.
2. Start the refrigerant source, either Liebert XDP or Liebert XDC. For that procedure, refer to the unit’s user manual, available at Liebert’s Web site:
www.liebert.com
Figure 33 Fan switches, standard Liebert XDH
Secondary Circuit Breaker
Primary Circuit Breaker
Switch for Upper Bank of Fans
Switch for Lower Bank of Fans
Front of XDH
32
Operation
8.2
Start the Liebert XDH Smart Module
At least one bank of the Liebert XDH’s fans must be On before starting the Liebert XDP or Liebert
XDC that will supply refrigerant to the Liebert XDH units.
To start the Liebert XDH:
1. Turn On one or both of the Liebert XDH’s banks of fans by pressing either of the push button
switches on the front of the unit (see Figure 34).
a. Pressing the left push button (toggle) switch starts the top and bottom fans in the upper half of the Liebert XDH; the right toggle switch starts the top and bottom fans in the lower bank.
b. Pressing either toggle switch a second time initiates an algorithm that turns the middle fans in the fan banks On and Off as needed for cooling.
2. Pressing each toggle switch a third time turns the middle fans on continuously.
3. Start the refrigerant source, either a Liebert XDP or a Liebert XDC. For that procedure, refer to the unit’s user manual, available at Liebert’s Web site:
www.liebert.com
Figure 34 Fan switches, Liebert XDH smart modules
Red and Green LEDs for Lower Bank of Fans
Red and Green LEDs for Upper Bank of Fans
Push Button Switches for Upper Bank of Fans
Front of XDH
Push Button Switches for Lower Bank of Fans
8.3
Smart Module LED Indicators
Liebert XDHs with smart modules have two LEDs on the front, one red and one green.
• Red LED indicates alarms
• Green LED indicates the status of fan relays
8.3.1 LED Meanings
Red LED
• Blinking every 2 seconds: Fans are off; remote shutdown is not active
• Blinking On for 1 second, Off for 1 second: Remote shutdown is active
• Unlit: No alarms; remote shutdown is not active
• On Continuously (not blinking): Alarm condition; either a fan undercurrent condition or a condensate detection condition. Remote shutdown is not active.
Green LED
• Unlit: No fan relays are active
• Blinking On for 1 second, Off for 1 second: Only one fan relay is active
• On Continuously (not blinking): Both fan relays are active, no fans under temperature control
8.3.2 Activating Remote Shutdown Option
The optional remote shutdown option can be made operational by removing the jumper on Terminal
Blocks 37 and 38. If the jumper is not removed, the unit will stay active.
If the remote shutdown jumper is present, then remote shutdown is not operational.
33
Maintenance
9.0
M
AINTENANCE
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
Fluorinated Greenhouse Gas Requirements
Stationary air conditioning, refrigeration, heat pump equipments and stationary fire protection systems in the European Community market and operating with fluorinated greenhouse gases (f-gas), such as R407C, R134a, R410A, must comply with the F-Gas Regulation: (EC) No. 842/2006 (F-gas).
The regulation prohibits, among other actions, venting fluorinated greenhouse gases to the atmosphere.
The F-Gas Regulation requires operators to 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.
9.2
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.
• Turn off the two fan switches on the front of the Liebert XDH (see Figure 33).
The conditions required for sensitive electronic equipment should preclude the accumulation of appreciable 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.)
34
Maintenance
9.3
Remove Fan Tray
!
WARNING
Risk of electric shock. Can cause injury or death.
System contains hazardous electrical voltage. Disconnect both power cords from the electrical supply outlets or from the receptacles on the back of the Liebert XDH before working within.
• Turn off the two fan switches on the front of the Liebert XDH (see Figure 33).
1. Ensure that all electrical power to the Liebert XDH has been shut off before beginning to remove the fan tray.
2. Remove four bolts on the Liebert XDH fan tray (see Figure 35).
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 35 Remove fan tray
Remove four bolts securing the fan tray to the front of the XDH
35
Maintenance
9.4
Accessing Internal Components in the Rear of the Liebert XDH
The Liebert XDH rear panel can be removed to gain access to internal components, such as the electronic boards and related items. The panel of the standard Liebert XDH or units with Smart IO con-
nections is removed the same way, by removing the bolts on the rear panel (see Figure 36).
Figure 36 Remove Liebert XDH rear panel
Allen
Bolts
Rear Panel of Liebert XDH
Rear View
36
Maintenance
9.5
Open Electric Box—Liebert XDH Standard Modules
!
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 electric box in the lower portion of the Liebert XDH can be opened for maintenance, such as replacing a circuit breaker and checking wiring connections. To open the box:
1. Disconnect both power cords from the electrical supply outlets or from the receptacles on the back of the Liebert XDH.
2. Remove the back from the Liebert XDH and lay it aside where it will not be damaged (see
3. Unplug the power cords from the primary and secondary input connections on the electric box.
4. Remove the two screws on the front of the electric box (see Figure 37).
5. Lift off the front of the electric box.
After performing the maintenance, reverse the removal steps to reinstall the electric box’s front cover.
Figure 37 Open electric box on Liebert XDH standard module
Remove these two screws to open the electric box
37
Maintenance
9.6
Open Electric Box—Liebert XDH Smart Modules
!
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 electric box in the lower portion of the Liebert XDH can be opened for maintenance, such as replacing a circuit breaker and checking wiring connections. To open the box:
1. Disconnect both power cords from the electrical supply outlets or from the receptacles on the back of the Liebert XDH.
2. Remove the back from the Liebert XDH and lay it aside where it will not be damaged (see
3. Unplug the power cords from the primary and secondary input connections on the electric box.
4. Remove the four screws on the front of the electric box the lower two screws may be loosened and
left in the box (see Figure 37).
5. Lift off the front of the electric box.
After performing the maintenance, reverse the removal steps to reinstall the electric box’s front cover.
Figure 38 Open electric box on Liebert XDH smart module
Remove screws from these four holes (bottom two screws may be loosened and the cover plate lifted off the slots)
38
Specifications
10.0 S
PECIFICATIONS
Table 7 Liebert XDH32 specifications
Models
XDH32DK
XDH32BK
1
XDH32SK
(60Hz)
1
Cooling Capacity
XDH32, 60Hz Nominal (98ºF [37°C] EAT): 30kW/8.5 Tons
XDH32, 60Hz Maximum(105ºF [41°C] EAT): 34kW/9.7 Tons
XDH32, 50Hz Nominal (98ºF [37°C] EAT): 30kW/8.5 Tons
XDH32, 50Hz Maximum(103ºF [39°C] EAT): 34kW/9.7 Tons
Conditions
XDH32DS
XDH32BS
1
XDH32SS
(50/60Hz)
1
Capacity rating is @ 55ºF (13ºC) Entering Fluid Temperature and 50ºF (10ºC) or lower dew point
Electrical Requirements
Input 120V-1ph-60Hz
220-240V-1ph-50Hz, CE /
208-240V-1ph-60Hz, CSA
Input Power Connections
Two IEC320-C14 power inlets and two IEC power cords with NEMA 5-15P plugs
10
Two IEC320-C14 power inlets and two IEC power cords with IEC320-C14 plugs
5 Full Load Amps
Power Consumption,
Nominal, Watts
Dimensions, inches (mm)
Height—Unit Only
Height—Including
Pipe Connections
Width
Depth
Weight, lb (kg)
Unit Only
Shipping Weight
1200
246 (112)
330 (150)
78 (1981)
80 (2032)
12 (305)
42 (1067)
1150
246 (112)
330 (150)
6
Number of Fans
Airflow, Nominal, ft
3
/min (m
3
/hr)
Audible Noise,
Sound Power
Pipe Connections
Refrigerant Supply
Refrigerant Return
Serviceable Parts
Cabinet Exterior Finish
Options
** Condensate sensing
(factory-installed), discontinued April 2009
Smart Module control board (factory-installed)
Pre-Charged Refrigerant
Air Diffusers
Agency
Approvals
1. Refer to Figure 2 for complete part number.
2. Discontinued April 2009.
4000 (6796)
86 dBa
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
Black, matte finish, heat-fused powder coat
R-134a refrigerant, one-shot connections
Uni-directional or bi-directional
CSA 60Hz
Dry contact (24VAC - 1A maximum)
Dry contact (24VAC - 1A maximum)
3850 (6541)
86 dBa
CE 50Hz, CSA 50/60Hz
39
Specifications
Table 8
Conditions
Liebert XDH20 specifications
Models
Cooling Capacity
XDH20DK
XDH20BK
1
XDH20SK
(60Hz)
1
XDH20DS
XDH20BS
1
XDH20SS
(50/60Hz)
1
XDH20, 60Hz Nominal (98ºF [37°C] EAT): 22kW/6.3 Tons
XDH20, 60Hz Maximum(105ºF [41°C] EAT): 25.3kW/7.2 Tons
XDH20, 50Hz Nominal (98ºF [37°C] EAT): 21.6kW / 6.1 Tons
XDH20, 50Hz Maximum(105ºF [41°C] EAT): 25.3kW/7.2 Tons
Capacity rating is @ 55ºF (13ºC) Entering Fluid Temperature and 50ºF (10ºC) or lower dew point
Electrical Requirements
Input
Input Power Connections
120V-1ph-60Hz
Two IEC320-C14 power inlets and two IEC power cords with NEMA 5-15P plugs
5
220-240V-1ph-50Hz, CE /
208-240V-1ph-60Hz, CSA
Two IEC320-C14 power inlets and two IEC power cords with IEC320-C14 plugs
2.5
Full Load Amps
Power Consumption,
Nominal, Watts
Dimensions, inches (mm)
Height—Unit Only
Height—Including
Pipe Connections
Width
Depth
Weight, lb (kg)
Unit Only
Shipping Weight
600
233 (106)
317 (144)
78 (1981)
80 (2032)
12 (305)
42 (1067)
575
233 (106)
317 (144)
6
Number of Fans
Airflow, Nominal, ft
(m
3
/hr)
3
/min
Audible Noise, Sound Power
Pipe Connections
Refrigerant Supply
Refrigerant Return
Serviceable Parts
Cabinet Exterior Finish
Options
Condensate sensing
(factory-installed), discontinued April 2009
Smart Module control board (factory-installed)
Pre-Charged Refrigerant
Air Diffusers
Agency
Approvals
1. Refer to Figure 2 for complete part number.
2. Discontinued April 2009.
2500 (4248)
81 dBa
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
Black, matte finish, heat-fused powder coat
R-134a refrigerant, one-shot connections
Uni-directional or bi-directional
CSA 60Hz
2428 (4125)
Dry contact (24VAC - 1A maximum)
Dry contact (24VAC - 1A maximum)
81 dBa
CE 50Hz, CSA 50/60Hz
40
Specifications
Table 9
Description
Liebert XD
Flex Pipe Kit
Length ft (m)
10 (3.0)
8 (2.5)
6 (1.8)
4 (1.2)
Liebert P/N
Straight Connection
Assembly
186566G2
186566G3
186566G1
186566G4
Liebert P/N
90-Degree Connection
Assembly
186565G2
186565G3
186565G1
186565G4
Table 10 Liebert XD Flex Pipe removable assemblies, supply and return
Description
Liebert XD
Flex Pipe Kit
Liebert XD Flex Pipe one-shot assemblies, supply and return
Length ft (m)
10 (3.0)
8 (2.5)
6 (1.8)
4 (1.2)
Liebert P/N
Straight Connection
Assembly
187865G2
187865G3
187865G1
187865G4
Liebert P/N
90-Degree Connection
Assembly
187864G2
187864G3
187864G1
187864G4
Minimum Bend Radius in (mm)
Supply Return
7 (178) 9 (229)
Minimum Bend Radius in (mm)
Supply Return
7 (178) 9 (229)
41
Ensuring The High Availability
Of 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. Enterprises benefit from greater IT system availability, operational flexibility and reduced capital equipment and operating costs.
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.
® Liebert is a registered trademark of Liebert Corporation.
All names referred to are trademarks or registered trademarks of their respective owners.
SL-17210_REV12_07-09
Emerson Network Power.
The global leader in enabling Business-Critical Continuity.
AC Power Embedded Computing
Connectivity Embedded Power
DC Power Monitoring
Technical Support / Service
Web Site
www.liebert.com
Monitoring
800-222-5877
Outside the US: 614-841-6755
Single-Phase UPS
800-222-5877 [email protected]
Outside the US: 614-841-6755
Three-Phase UPS
800-543-2378 [email protected]
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
852 2572 2201
Fax: 852 2519 9210
Outside Plant
Power Switching & Controls
Precision Cooling
EmersonNetworkPower.com
Racks & Integrated Cabinets
Services
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.
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