Vertiv Liebert XDC, XDC160, 189192G3, XDC160AA, 189192G5 User Manual
...
Liebert® XDC™
50 & 60 Hz, 130 & 160kW Nominal Cooling Capacity;
ModelRevision5orHigher
User Manual
Technical Support Site
If you encounter any installation or operational issues with your product, check the pertinent section of
this manual to see if the issue can be resolved by following outlined procedures. Visit
https://www.VertivCo.com/en-us/support/ for additional assistance.
TABLE OF CONTENTS
1 Important Safety Instructions 5
2 Product Description 9
2.1 General Product Information 9
2.1.1 Product/System Description 9
2.2 Equipment Inspection 10
2.3 Equipment Handling 10
2.3.1 Handling the Liebert XDC While it is on Skid and Packaged 10
2.3.2 Unpacking the Liebert XDC 11
2.3.3 Removing the Unit from the Skid Using a Forklift 11
2.3.4 Removing the Unit from the Skid using Rigging 12
2.3.5 Moving the Liebert XDC Using Piano Jacks 13
2.3.6 Removing the Unit from the Piano Jacks 14
3 Installation 15
3.1 Mechanical Considerations 15
3.1.1 Positioning the Liebert XDC 15
3.1.2 Placing the Liebert XDC on a Floor Stand 17
3.1.3 Positioning the Liebert XDC with Floor Stand 20
3.2 Electrical Considerations 22
3.2.1 High Voltage Connections 22
3.2.2 Connecting High-Voltage Cables 23
3.3 External Pump Overloads 27
3.4 Extra Low Voltage Connections 28
3.5 Remote Sensor Installation—Proper Placement 34
4 Piping and Filling with Refrigerant: R-134a and R-407C Circuits 37
4.1 European Union Fluorinated Greenhouse Gas Requirements 37
4.2 Recommended Pipe Size 37
4.3 Liebert XDC Interconnection With Liebert XD Cooling Module 38
4.4 Piping Installation Method 38
4.4.1 Piping Installation—R-134a Pumped Circuit 39
4.4.2 Bypass Flow Controllers 39
4.5 Piping Details—Shutoff/Isolation Valves 41
4.6 Filling the Pumped Circuit—R-134a 41
4.6.1 Calculating Refrigerant Charge—Example 44
4.6.2 Piping for Direct Expansion (DX) Circuit—R-407C Air-Cooled Units 45
4.7 Install Double Discharge Risers 45
4.7.1 Air-Cooled Condenser with Liebert Lee-Temp “Flooded Condenser” Head Pressure
Control System—R-407C (DX) Circuit 54
4.8 Filling the Direct Expansion (DX) Circuit—R-407C 55
4.9 System Refrigerant Charges Over 55lb. (24.9kg) Require Additional Oil 57
4.9.1 Liebert XDC DX R-407C Circuit Volume 57
5 Installation Checklist 59
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6 Liebert iCOM Control—Firmware Version XP1.00.009.STD 61
6.1 Liebert iCOM Components and Functions 61
6.2 Display Lamp Indicators 63
6.3 Navigating Through the Liebert iCOM Display 63
6.3.1 Accessing Menus and Settings 64
6.3.2 Cooling Module Overview 64
6.3.3 Entering the Password 65
6.4 Changing Liebert iCOM’s Display Settings 66
6.5 Changing Operational Settings 67
6.6 Graphical Data Record 67
6.7 Liebert iCOM User Menu Icons and Legend 68
6.8 Liebert iCOM User Menu Screens 69
6.9 Liebert iCOM Service Menu Icons and Legend 79
6.10 Liebert iCOM Service Menu Screens 80
7 Start the Liebert XDC with Liebert iCOM 111
7.1 Checklist for Liebert XDC Startup 111
8 Alarm Descriptions and Solutions 115
8.1 Alarm Descriptions 115
8.2 Warning Descriptions 118
8.3 System Shutdown Causes 118
9 Troubleshooting 121
10 Maintenance 123
10.1 Fluorinated Greenhouse Gas Requirements 123
10.2 Air-Cooled Condenser 123
10.3 Water/Glycol Floor Stand Condenser 124
10.3.1 Shell and Tube Condensers 124
10.3.2 Regulating Valves 124
10.3.3 Glycol Solution Maintenance 124
11 Specifications 127
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1 IMPORTANT SAFETY INSTRUCTIONS
Save These Instructions
This manual contains important safety instructions that should be followed during the installation and
maintenance of the Liebert XDC. Read this manual thoroughly before attempting to install or operate this
unit.
Only qualified personnel should move, install or service this equipment.
Adhere to all warnings, cautions, notices and installation, operating and safety instructions on the unit
and in this manual. Follow all operating and user instructions.
Follow all local codes.
WARNING! Risk of arc flash and electric shock. Can cause equipment damage or death.
Disconnect all local and remote electric power supplies and wear protective equipment per
NFPA 70E before working within electric control enclosure. Failure to comply can cause serious
injury or death.
Customer must provide earth ground to unit, per NEC, CEC and local codes, as applicable.
Before proceeding with installation, read all instructions, verify that all the parts are included
and check the nameplate to be sure the voltage matches available utility power.
The Liebert iCOM microprocessor does not isolate power from the unit, even in the Unit Off
mode. Some internal components require and receive power even during the Unit Off mode of
Liebert iCOM control.
The line side of the disconnect switch on the front of the unit contains live high-voltage.
The only way to ensure that there is NO voltage inside the unit is to install and open a remote
disconnect switch. Refer to unit electrical schematic.
Follow all local codes.
WARNING! Risk of unit falling over. Can cause equipment damage, injury and death.
The Liebert XDC is top-heavy. Use extreme caution and care when moving and installing this
unit.
WARNING! Risk of refrigerant system explosion or rupture from overpressurization. Can cause
equipment damage, injury and death.
Installer must install a 400 psig pressure relief valve in each of the two R-407C refrigerant
circuits of the Liebert XDC system. Do not install shutoff valves between the compressors and
the pressure relief valves.
For systems requiring EU CE compliance, the pressure relief valves must be CE-certified by a
notified body to the EU Pressure Equipment Directive.
CAUTION: Risk of piping and component rupture. Can cause equipment damage and injury.
Closing service valves may isolate liquid refrigerant, causing high pressure and rupture of
piping. Do not close valves without following recommended procedures for repair, maintenance
and replacement of components. Install pressure relief valves in field piping that may become
isolated by service valves.
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NOTICE
CAUTION: Risk of contact with hot surfaces. Can cause burn injury.
The compressors, pump motors and refrigerant discharge lines are extremely hot during unit
operation. Allow sufficient time for the compressors, pump motors and refrigerant discharge
lines to cool before working within the unit cabinet. Use extreme caution and wear protective
gloves and arm protection when working on or near hot compressor, pump motors or
discharge lines.
CAUTION: Risk of improper installation and startup. Can cause warranty cancellation,
equipment damage and injury.
Read and follow completely the installation and start up instructions that are factory supplied
with the unit.
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 the unit for installation.
Risk of a leaking coil due to freezing and/or corrosion. Can cause equipment and serious
building damage.
NOTICE
Cooling and heat rejection coils, heat exchangers and piping systems that are connected to
open cooling towers or other open water/glycol systems are at high risk for freezing and
premature corrosion. Fluids in these systems must contain the proper antifreeze and inhibitors
to prevent freezing and premature coil corrosion. The water or water/glycol solution must be
analyzed by a competent water treatment specialist before startup to establish the inhibitor
requirement. The water or water/glycol solution must be analyzed every six months to
determine the pattern of inhibitor depletion. The complexity of water-caused problems and
their correction makes it important to obtain the advice of a water treatment specialist and
follow a regularly scheduled maintenance program.
Risk of leaking chilled water lines. Can cause equipment and building damage.
Lines and joints must be inspected regularly. Improper installation, application and service
practices can result in water leakage from the unit. Water leakage can result in severe property
damage and loss of critical data center equipment. Do not locate unit directly above any
equipment that could sustain water damage. Vertiv recommends installing monitored leak
detection equipment for the unit and supply and return lines.
Vertiv | Liebert® XDC™ User Manual | 6
NOTICE
Risk of clogged or leaking drain lines. Can cause equipment and building damage.
This unit requires a water drain connection. Drain lines must be inspected regularly and
maintenance must be performed to ensure that drain water runs freely through the drain
system and that lines are clear and free of obstructions and in good condition with no visible
sign of damage or leaks. This unit may also require an external water supply to operate.
Improper installation, application and service practices can result in water leakage from the
unit. Water leakage can result in severe property damage and loss of critical data center
equipment.
Do not locate unit directly above any equipment that could sustain water damage.
Vertiv recommends installing monitored leak detection equipment for the unit and the supply
and return lines.
NOTE: This document must be used with site specific documentation and documentation for other
parts of the system (heat rejection devices and cooling modules).
NOTE: Before any action that could cause a disturbance in the Liebert XD system’s cooling function is
begun, the facility manager MUST be informed. In addition, after the action is taken and the work is
finished, the facility manager MUST be informed.
Figure 1.1 Model number nomenclature
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2 PRODUCT DESCRIPTION
2.1 General Product Information
2.1.1 Product/System Description
The Liebert XDC™(X-treme Density Chiller) is a self-contained refrigeration distribution unit designed to
cool rooms with high heat producing equipment. There are two distinct circuits, each utilizing different
refrigerants and mechanical parts. The R-134a circuit is the “pumped” circuit containing redundant
circulating pumps, a brazed plate heat exchanger along with valves and piping. The R-407C circuit is the
dual direct expansion circuit containing scroll compressors, expansion valves, brazed plate heat
exchanger, and piping. Heat removal is accomplished by using condensers connected to the dual direct
expansion circuit. Heat rejection is available in two options: an outdoor air-cooled condenser and a
water/glycol condenser. See Figure 2.1 below below.
The Liebert XDC monitors room conditions and prevents coil condensation by maintaining the refrigerant
being pumped to the cooling modules at a temperature above the room dew point. All functions, such as
temperature control, switching pumps (if necessary), etc., are automatic.
The Liebert XDC’s minimum recommended operating load is 40% of system nominal capacity. For
example, a Liebert XDC160 60Hz system’s minimum load would be 64kW. Loading below this value can
unfavorably affect system operation.
See Table 11.1 on page127 for the Liebert XDC160 rated cooling capacity.
Figure 2.1 Liebert XDC components
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2.2 Equipment Inspection
When the unit is delivered, 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 or to your sales
representative.
NOTICE
Risk of improper storage. Can cause equipment damage.
Keep the Liebert XDC upright, indoors and protected from dampness, freezing temperatures
and contact damage.
2.3 Equipment Handling
WARNING! Risk of unit falling over. Can cause injury or death.
The Liebert XDC is top-heavy. Use extreme caution when moving and installing this unit. Use
lifting equipment that is rated for the weight of the unit by an OSHA-certified rating
organization. See Table 11.1 on page127 for unit weights. Personnel should be properly trained
and certified to move and rig equipment
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 the unit for installation.
2.3.1 Handling the Liebert XDC While it is on Skid and Packaged
• Always keep the unit upright, indoors and protected from damage.
• If possible, transport the unit using a forklift truck. Otherwise use a crane with slings and
spreader cables. In either case, do NOT press on the top edges of the packaging.
• If using a forklift or pallet jack, make sure the forks (if adjustable) are spread to the widest
allowable distance to still fit under the skid.
• When moving the skidded unit with a forklift, do not lift the unit any higher than 3"(76mm). If
circumstances require the unit to be lifted higher than 3"(76mm), great care must be
exercised and all by-standing personnel are to be no closer than 20 feet (6m) from the lift point
of the unit.
NOTICE
Risk of structural interference. Can cause equipment or building damage.
While on the skid, the unit is too tall (83" [2108mm] overall height) to fit through a standard
doorway. Any attempt to move the unit, while skidded, through a standard doorway will cause
damage to the unit and to the building.
NOTICE
Risk of damage from forklift. Can cause unit damage.
Keep the forklift tines level and at a height suitable to fit below the skid and/or unit to prevent
exterior and/or underside damage.
Vertiv | Liebert® XDC™ User Manual | 10
NOTICE
Risk of improper storage. Can cause unit damage.
Keep the Liebert XDC upright, indoors and protected from dampness, freezing temperatures
and contact damage.
NOTICE
Risk of overtightening securing straps. Can cause damage to panels.
Place a protective material between the straps of the piano jacks and the unit. Ensure that the
straps are not tightened to a point of damaging panels.
2.3.2 Unpacking the Liebert XDC
1. Remove the exterior stretch wrap packaging from the unit, exposing the protective corner and
side packaging planks.
2. Remove the corner and side packaging planks from the unit, exposing the bag over the unit.
The bag may remain in place for dust and panel protection or removed for immediate unit
installation.
3. Remove the bag from the unit when ready to remove the skid for installation.
Figure 2.2 Unpacking the Liebert XDC
2.3.3 Removing the Unit from the Skid Using a Forklift
1. Align the forklift with either the front or rear side of the unit.
Make sure the tines of the forklift are locked at their widest position.
Use the center of gravity indicators to determine the entry points for the tines. The tines must
be equally spaced on either side of the center of gravity indicator (see Figure 2.3 on the next
page).
Vertiv | Liebert® XDC™ User Manual | 11
2. Insert the tines of the forklift under the unit.
Make sure the tines are level. The tines must be low enough to fit under the unit without
damaging it.
Make sure the tines extend beyond the opposite side of the unit.
3. Remove the 12 lag bolts and two brackets that secure the unit to the skid.
NOTE: Each lag bolt is 1-1/2" (38mm) long. They can be removed with a 9/16" socket or wrench.
4. Lift the unit to a height that it is not being support by the skid.
5. Move the skid from under the unit.
Figure 2.3 Use a forklift to remove the Liebert XDC from the skid
2.3.4 Removing the Unit from the Skid using Rigging
1. Use the center of gravity indicators on the unit to position the slings. The slings must be
equally spaced on either side of the center of gravity indicator (see Figure 2.4 on the facing
page).
2. Place slings under the unit using spaces provided between the skid deck boards.
NOTE: Unit is shown without outer packaging. These instructions may be applied with the outer
packaging in place.
3. Use spreader bars or an equivalent method to ensure proper protection of the unit.
4. Ensure that the panels, if attached, are well protected from the slings with cushioning material.
NOTE: If rigging is to be used to move the unit closer to the site for installation, place one or two
horizontal straps around the unit and vertical straps at mid height.
5. Remove the 12 lag bolts and two brackets that secure the unit to the skid.
NOTE: Each lag bolt is 1-1/2" (38mm) long. They can be removed with a 9/16" socket or wrench.
Vertiv | Liebert® XDC™ User Manual | 12
6. Lift the unit off of the skid to an elevation point where the skid is not supporting the weight of
the unit.
7. Remove the skid from under the unit.
NOTE: Depending on final installation location and the method of moving the Liebert XDC, the skid may
need to remain under the unit.
Figure 2.4 Removing the unit from the skid using rigging
2.3.5 Moving the Liebert XDC Using Piano Jacks
1. Elevate the Liebert XDC with a lifting mechanism, such as a forklift or rigging.
1. Position one piano jack at each end of the Liebert XDC.
2. Lower the unit to a height suitable for placing it on the piano jacks.
3. Put protective material between the Liebert XDC and the piano jacks and straps.
4. Secure the Liebert XDC to the piano jacks.
5. Release the the Liebert XDC from the straps securing it to the lifting mechanism and move the
mechanism away from the unit.
Using the piano jacks, at least two properly trained and qualified personnel can move the unit.
Vertiv | Liebert® XDC™ User Manual | 13
Figure 2.5 Securing the Liebert XDC to piano jacks
2.3.6 Removing the Unit from the Piano Jacks
1. Lower the Liebert XDC as far as the piano jacks will allow.
2. Undo all strapping holding the piano jacks to the unit.
3. Lift one end of the Liebert XDC off one piano jack with a pry bar or similar device, taking care
not to damage the unit’s cabinet.
4. Repeat step 3 to remove the piano jack from under the opposite end of the Liebert XDC.
5. Remove all material used to protect the unit from the piano jacks and strapping.
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3 INSTALLATION
3.1 Mechanical Considerations
3.1.1 Positioning the Liebert XDC
Install the Liebert XDC according to the site specific documentation and secure the unit to the floor.
The Liebert XDC can be installed near a wall or another Liebert XDC. However, there must be at least
3feet(92cm) clearance in front of the Liebert XDC as service access for components in the unit.
NOTE: During installation of the Liebert XDC, the top, bottom, front and left side of the unit must be
accessible.
Figure 3.1 Dimensional data
Table 3.1
Liebert XDC dimensions, weight
Air-Cooled
Model
50/60Hz A B* C D E F Domestic Export
XDC160 74 (1880) 34 (864) 33-1/ 8 (841) 33 (838) 72 (1829) 78 (1981) 1975 ( 896) 2109 (957)
*Dimension does not include the bezel ofthe disconnectswitch, the handle or the control bezel.
Vertiv | Liebert® XDC™ User Manual | 15
Dimensional Data, inches (mm)
Shipping Weight
lb. (kg)
Figure 3.2 Piping locations
Table 3.2
Liebert XDC piping connection sizes
Piping Outlet Connection Sizes, OD Cu, inches
50/60Hz
A B C D
XDC160 2-1/8 1-1/8 1-3/8 7/8
Source: DPN001599
Vertiv | Liebert® XDC™ User Manual | 16
3.1.2 Placing the Liebert XDC on a Floor Stand
WARNING! Risk of top-heavy unit falling over. Improper handling can cause equipment
damage, injury or death.
Only properly trained and qualified personnel wearing appropriate safety headgear, gloves,
shoes and glasses should attempt to move, lift, remove packaging from or prepare unit for
installation.
Read all of the following instructions before attempting to move, lift, remove packaging from or
preparing unit for installation.
The water/glycol floor stand can be located beneath the Liebert XDC unit or can be installed
nearby.
NOTE: Consult the factory if the Liebert XDC is not installed on the water/glycol condenser floor stand
to prevent exceeding the maximum piping distances.
Refer to the floor stand installation sheet shipped inside the water regulating valve package.
1. Move the floor stand assembly to its installation area and uncrate the unit.
2. Position the floor stand in its final location.
3. Insert leveler pads into each floor stand leg.
4. Level the top of the floor stand to the specified height with the flanged adjusting nut.
5. Tighten jam nuts on all legs against flanged adjusting nuts.
6. Using an appropriate lifting device or method, raise the Liebert XDC and move it above the
floor stand.
7. Align the welded tabs on top of the floor stand with the inside of the unit frame base (see Detail
A in Figure 3.3 on the next page).
8. Maintaining the alignment of the Liebert XDC and the floor stand, lower the Liebert XDC onto
the floor stand.
9. Connect the hot gas refrigerant lines from the Liebert XDC to the floor stand with 1-3/8" tubing
(see Figure 3.3 on the next page andFigure 3.4 on page20).
10. Connect the liquid refrigerant lines as shown from the Liebert XDC unit to the floor stand with
7/8" tubing (see Figure 3.3 on the next page andFigure 3.4 on page20).
11. Connect the water lines as shown with the provided valving (see Figure 3.3 on the next page
andFigure 3.4 on page20).
12. Connect capillary lines from each water regulating valve to condensers in the floor stand (see
Figure 3.3 on the next page andFigure 3.4 on page20).
Capillary length is limited to 48" (1219mm).
13. Check the pipes for leaks and evacuate air from all pipes.
14. Insulate all water/glycol lines.
15. Charge each condenser loop with R-407C (see Table 4.15 on page57).
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Figure 3.3 Water/glycol Liebert XDC on a floor stand—positioning and piping connections
Vertiv | Liebert® XDC™ User Manual | 18
Table 3.3
Liebert XDC water/glycol piping connection sizes
Model Piping Outlet Connection Sizes, OD Cu, inches
50/60Hz A B C D
1
E
2
F
XDC160 2-1/8 1-1/8 1-3/8 7/8 2-1/2 2-1/8 or 2-5/8
1. Threaded female connection
2. 2-1/8" for 1" water r egulatingvalve; 2-5/8" for 1- 1/4" water regulating valve
Source: DPN00141 9 Rev. 2
Vertiv | Liebert® XDC™ User Manual | 19
Figure 3.4 Piping locations—floor stand and valve assembly
3.1.3 Positioning the Liebert XDC with Floor Stand
Install the Liebert XDC according to the site-specific documentation and secure the unit to the floor.
The Liebert XDC can be installed near a wall or another Liebert XDC. There must be at least 3 feet
(914mm) clearance in front of the Liebert XDC for service access. When the Liebert XDC is combined with
the optional water/glycol floor stand, Vertiv recommends leaving 3 feet (914mm) of clearance on the left
side of the unit.
Vertiv | Liebert® XDC™ User Manual | 20
A Liebert XDC on a floor stand is 102 inches (2591 mm) high (see Figure 3.5 below). The unit can be raised
or lowered 1.5 inches (38.1 mm) with the leveling feet.
Figure 3.5 Dimensions and clearances for Liebert XDC on floor stand
Vertiv | Liebert® XDC™ User Manual | 21
3.2 Electrical Considerations
3.2.1 High Voltage Connections
Make sure the actual supply voltage and frequency correspond to the voltage and frequency indicated
on the Liebert XDC’s rating plate.
Connect cables for high voltage supply to the electrical box in the Liebert XDC according to Figure 3.1 on
page15, Figure 3.7 on page24 and Figure 3.8 on page25 and make sure that the phases are correctly
connected.
WARNING! Risk of electric shock. Can cause death and injury.
Disconnect all local and electric remote power supplies before working within.
WARNING! Risk of electrical shock, short circuit and/or control malfunction. Can cause
equipment damage injury and death.Damage to wiring or components can make unit unsafe to
operate.Use caution when installing wiring to prevent damage to factory wiring.Install
protective bushings in wiring knockouts as required to protect wiring from sharp edges.Do not
disturb factory wiring or route field-installed wiring over electrical terminals.Use NEC Class 1
wiring for all hazardous voltage electrical power supplies.Check and retighten all wiring
connections before starting the unit.
NOTE: Before beginning to install the Liebert XDC, read all instructions, verify that all the parts are
included and check the nameplate to be sure the Liebert XDC voltage matches available utility power.
Follow all local codes.
Vertiv | Liebert® XDC™ User Manual | 22
3.2.2 Connecting High-Voltage Cables
1. Turn the Liebert XDC’s primary disconnect switch to the Off position (see Figure 3.6 below).
Open the front doors and push down on the enclosure cover latch to open the hazardous
voltage enclosure cover.
Figure 3.6 Front view of Liebert XDC and electrical enclosures
Vertiv | Liebert® XDC™ User Manual | 23
2. Determine which knockouts in the electrical enclosure will be used and remove them (see
Figure 3.7 below).
Figure 3.7 Electrical enclosure knockout locations for field wiring
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3. Route the input hazardous voltage electrical power wiring through the top right knockout on
the primary electrical enclosure (see Figure 3.7 on the previous page) to the disconnect
switch L1, L2 and L3 (see Figure 3.8 below). Observe proper phasing.
4. Connect the ground wire to the ground lug (see Figure 3.8 below andFigure 3.10 on the next
page for 60Hz models and Figure 3.9 below andFigure 3.11 on the next page for 50Hz models).
Figure 3.8 60Hz models, high voltage connections—primary disconnect switch
Figure 3.9 50Hz models high voltage connections—primary disconnect switch
Vertiv | Liebert® XDC™ User Manual | 25
Figure 3.10 60Hz models high voltage connections—secondary disconnect switch
Figure 3.11 50Hz models high voltage connections—secondary disconnect switch
Vertiv | Liebert® XDC™ User Manual | 26
3.3 External Pump Overloads
The Liebert XDC is shipped with external pump overload with trip point settings and DIP switch settings
for normal operations. The trip points are in increments of 0.25A and should not be changed from the
factory settings. For 460V 60Hz and 380-400V 50Hz units, the trip point is set at 1.5A (Figure 3.12 below).
See Figure 3.14 below for factory DIP switch settings for normal operation with reset mode set as
automatic and Trip Class 20.
Figure 3.12 460V 60Hz and 400V 50Hz factory setting external pump overload trip point
Figure 3.13 208V factory setting external pump overload trip point
Figure 3.14 Factory DIP switch settings
Vertiv | Liebert® XDC™ User Manual | 27
3.4 Extra Low Voltage Connections
Extra Low Voltage (ELV) power output is 30V and 100VA or less.
1. Turn off all unit power before connecting cables or wires. Failure to do so may damage this
equipment.
2. Route low voltage electrical connections through the appropriate knockouts as shown in
Figure 3.17 on page31.
3. User interface and temperature/humidity sensor wire is NEC Class 2. All electrical installation
must comply with all national, state and local requirements.
Figure 3.15 Liebert XDC heat rejection connection points
Vertiv | Liebert® XDC™ User Manual | 28
Figure 3.16 Connecting remote temperature/humidity sensors
Vertiv | Liebert® XDC™ User Manual | 29
Notes on Figure 3.16 on the previous page
1. See unit electrical schematic, installation and user manuals.
2. Cables A and B provided with each unit. Only one is used as follows:
a. Liebert IntelliSlot-Based Communications—Cable A is pre-connected to P65 on the
microprocessor and I/O board and P65 on Liebert IntelliSlot power supply.
b. Non-Liebert IntelliSlot-Based Communications—Cable B is pre-connected to Terminals
77 & 78 but must be exchanged with Cable A at P65 on the microprocessor and I/O
board.
3. Install applicable Liebert IntelliSlot cards.
4. Both cables (P64 and P66) are required.
5. It is not necessary to connect ground coupling on end of cable connected to Sensor A or B.
6. A crossover coupler is provided for unit-to-unit (U2U) networking. Unplug the red cable from
P64 on the microprocessor and I/O board and connect to one side of the crossover coupler.
The first customer connection point is to P64 on the microprocessor and I/O board. The
second customer connection point is to the other side of the crossover coupler. This connects
the microprocessor and I/O board and display to the private U2U network.
7. The remote sensors are interchangeable as to which connects to the Liebert XD cooling
module and which connects to P2 on CAN ISO.
8. Field-install cables with factory-installed ferrite beads (when provided, typical two places).
Each cable must make three passes through the ferrite bead. Locate the ferrite bead on top of
the electric box. See instruction sheet provided with the cable assembly.
9. Factory-installed ferrite bead (when provided). Cable passes through ferrite bead three times.
Vertiv | Liebert® XDC™ User Manual | 30
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