Liebert XDP User Manual

Precision Cooling
For Business-Critical Continuity™

Liebert® XDP

User Manual–50-60 Hz; 160kW Nominal Capacity

™

GENERAL SAFETY GUIDELINES

!

!

R

Pump

Redundancy

XD P 160 – 1

Pumping

unit

Revision

level

Liebert

X-treme heat

Density system

160kW
nominal
capacity

Place holder

Example: XDP160A– –1

A

A = 460V-3ph-60Hz

(voltage-phase-frequency)

C = 208V-3ph-60Hz

M = 380/415-3ph-50Hz

–

Place holder

WARNING

Risk of electric shock. Can cause injury or death.
Disconnect local and remote power supplies before working within.
Before proceeding with installation of the XDP, read all instructions, verify that all the parts

are included and check the nameplate to be sure the XDP voltage matches the available
utility power.

Follow all applicable codes.

WARNING

Risk of unit falling over. Can cause death, injury or property damage. The XDP is top-heavy.
Use extreme caution and care when moving and installing this unit.

NOTE

This document is intended to be be used together 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 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.

NOTICE

Risk of piping and component rupture. May cause injury or equipment damage.
Do not close service valves without following recommended procedures for repair,

maintenance and replacement of components. Closing service valves may isolate liquid
refrigerant, causing high pressure and rupture of piping. Install pressure relief valves in field
piping that may become isolated by service valves.

Figure i Model number nomenclature

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

GENERAL SAFETY GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INSIDE FRONT COVER

1.0 PRODUCT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.1 General Product Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.1.1 Product/System Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.2 Equipment Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

1.3 Equipment Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.3.1 Handling With Skid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.3.2 Removal from Skid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

1.3.3 Removing Piano Jacks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

1.4 Mechanical Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.4.1 Positioning the Liebert XDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

1.5 Electrical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.6 High Voltage Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.6.1 Connecting High-Voltage Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1.7 Extra Low Voltage (ELV) Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

2.0 PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

2.1 European Union Fluorinated Greenhouse Gas Requirements . . . . . . . . . . . . . . . . . . . . . . . 11

2.2 Connection Sizes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.2.1 Recommended Pipe Size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2.3 Liebert XDP Interconnection with Liebert XD Cooling Modules . . . . . . . . . . . . . . . . . . . . . 12

2.4 Piping Installation Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.4.1 Bypass Flow Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.5 Piping Details—Shut-Off/Isolation Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.5.1 Piping Installation Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.5.2 Piping Mains. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.5.3 Evacuation and Leak Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2.6 Checklist for Proper Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.0 CHECKLIST FOR LIEBERT XDP STARTUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16

3.1 Filling the Pumped Circuit—R-134a. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

3.1.1 Calculating Refrigerant Charge—Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4.0 MICROPROCESSOR CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

4.1 Feature Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.1.1 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.2 Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.2.1 Feature Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

i

4.3 Main Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.3.1 Viewing or Changing Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4.3.2 SETPOINTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.3.3 STATUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.3.4 ACTIVE ALARMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.3.5 ALARM HISTORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

4.3.6 TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.3.7 DATE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.3.8 SETUP OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

4.3.9 Password Security—SETPT PASSWORD and SERVICE PASSWORD . . . . . . . . . . . . . . . . . 25

4.3.10 CALIBRATE SENSOR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.3.11 ALARM ENABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.3.12 ALARM TIME DELAY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.3.13 COM ALARM ENABLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

4.3.14 CUSTOM ALARMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4.3.15 CUSTOM TEXT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

4.3.16 DIAGNOSTICS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.0 ALARM DESCRIPTIONS AND SOLUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

5.1 Alarm Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

5.2 Red and Green Lamp Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

5.3 Alter Alarm Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

5.3.1 Enable or Disable Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

5.3.2 Increase or Decrease Alarm Time Delays . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

5.4 System Shutdown Causes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

6.0 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

7.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

7.1 Fluorinated Greenhouse Gas Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

8.0 SPECIFICATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

ii

FIGURES

Figure i Model number nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Inside Front Cover

Figure 1 Liebert XDP components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 2 Tie-down brackets and lag bolts to be removed. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Figure 3 Removing pallet boards for piano jack insertion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Figure 4 Liebert XDP strapped to piano jack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Figure 5 Remove remaining lag bolts from one runner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Figure 6 Remove runner from pallet. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Figure 7 Sliding pallet from under Liebert XDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Figure 8 Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 9 Piping access points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Figure 10 Front view of Liebert XDP and electrical enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 11 Electrical enclosure knockout locations for field wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 12 High voltage connections—60Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 13 High voltage connections—50Hz . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 14 Electrical enclosure knockout locations for Extra Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Figure 15 Liebert XDP extra low voltage field connections points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Figure 16 Piping arrangement for Liebert XDP/Liebert XDC used with Liebert XD cooling modules . . . . 12

Figure 17 Bypass flow controller details, dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 18 Bypass flow controller arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 19 Bypass flow controller piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 20 General piping details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 21 System R-134a liquid level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 22 User interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

TABLES

Table 1 Liebert XDP dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Table 2 Unit piping outlet connection sizes, inches, OD Cu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Table 3 Supply, return pipe sizes for refrigerant loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Table 4 Bypass flow controllers for a Liebert XDP-based system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Table 5 Liebert XDP pump light indicator—208V and 400V units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 6 System refrigerant charge for the supply and return mains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 7 R-134a refrigerant charge for hard-piped connector lines to and from any model

Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 8 R-134a refrigerant charge for Flex Pipe connector lines to and from any model

Liebert XDO/Liebert XDH/Liebert XDV/Liebert XDCF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 9 System R-134a charge for a Liebert XDP with any model Liebert XDH/Liebert

XDO/Liebert XDV/Liebert XDCF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 10 Calculating refrigerant charge—example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 11 Worksheet to calculate refrigerant charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 12 User interface keypad functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Table 13 Setpoint functions, default values and allowable ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Table 14 Setup operation functions default values and allowable ranges. . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 15 Liebert XDP DIP switches and factory settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Table 16 Troubleshooting the XDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Table 17 Liebert XDP160 specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

iii

iv

1.0 PRODUCT DESCRIPTION

Liebert XDP Unit

Control Valve

Liebert XD Cooling Modules

Heat Exchanger

Receiver

Pumps

Chilled Water

1.1 General Product Information

1.1.1 Product/System Description

Liebert’s XDP refrigerant distribution unit is an interface between the building chilled water system
and the cooling modules in the Liebert XD system. It is designed to circulate and control refrigerant
to the cooling modules that are in the room with heat-producing equipment. The Liebert XDP consists
of a cabinet that includes a heat exchanger, circulating pump(s), control valve, receiver, controls,
valves and piping.

The Liebert XDP monitors room conditions and prevents coil condensation by maintaining the refrig­erant being pumped to the cooling modules at a temperature above the room’s dew point.

All functions, such as switching pumps (if applicable), controlling refrigerant temperature, etc., are
automatic.

The Liebert XDP’s minimum recommended operating load is 20% of system nominal capacity. For
example, a Liebert XDP160 60Hz system’s minimum load would be 32 kW. Loading below this value
can unfavorably affect system operation. Consult factory for any loading below this recommendation.

The Liebert XDP is rated for 160kW (546,000 BTU/H) of cooling.

Figure 1 Liebert XDP components

Product Description

1.2 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.

1

1.3 Equipment Handling

!

!

Remove these 2
tie-down brackets

Remove these 4 lag bolts
to free deck boards

Remove these 4 lag bolts
to free deck boards

WARNING

Risk of unit falling over. Can cause injury or death.
The Liebert XDP is top-heavy. Use extreme caution and care when moving and installing this

unit.

NOTE

Personnel should be properly trained and certified to move and rig equipment.

1.3.1 Handling With Skid

• Always keep the unit upright, indoors and protected from damage.

• If possible, transport the unit using a forklift truck. Otherwise use a crane with belts or cables. In
either case, do NOT press on the top edges of the packaging.

• If using a forklift, 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 truck, do not lift the unit any higher than
6" (152mm) off the ground. If circumstances require the unit to be lifted higher than 6" (152mm),
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.

CAUTION

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.

Product Description

1.3.2 Removal from Skid

Liebert recommends using dual hand trucks or a similar method to remove the Liebert XDP from the
skid. This is to ensure that both ends of the unit are firmly secure and to provide a good means of unit
mobility.

1. Always keep the unit upright, indoors and protected from possible damage.

2. Remove the exterior packaging. Leave the plastic bag over the Liebert XDP until the unit has
been moved to its final location. The bag will protect the painted panels against scuffing.

3. Remove two (2) corner tie-down brackets from one side of the unit, on a non-runner notch side of
the pallet. Remove eight (8) lag bolts from two (2) end deck boards on the same end where the
tie-down brackets were removed (refer to Figure 2).

Figure 2 Tie-down brackets and lag bolts to be removed

2

4. Remove the two (2) end deck boards from one end of the pallet and the attached, notched section

... and center runner sections
from one end of pallet.

Remove two deck boards ...

Piano jack

Strap secures the
Liebert XDP to the jack

Place cushioning material
between the forks and the Liebert
XDP to protect unit’s finish
(cushion not shown for clarity)

Piano jack’s forks should be
snug against the Liebert XDP

Remaining 6 lag bolts
to remove

of the center runners (refer to Figure 3).

Figure 3 Removing pallet boards for piano jack insertion

5. Place a piano jack with its forks snugly against the bottom of the unit and strap the Liebert XDP
securely to the jack (refer to Figure 4).

NOTE

Place a mover’s blanket or other cushioning material between the piano jack and the
unit’s side panels.

Figure 4 Liebert XDP strapped to piano jack

Product Description

6. Repeat Steps 2, 4 and 5 for the opposite side of the unit. When these steps have been completed,
the Liebert XDP will be supported by two piano jacks, one on either side.

7. Remove all of the remaining lag bolts from one (1) of the pallet’s outside runners (see Figure 5).

Figure 5 Remove remaining lag bolts from one runner

3

8. Remove the runner from which all lag bolts have been removed (refer to Figure 6).

Slide this runner away
from the Liebert XDP

Slide the remaining part of the pallet
from under the Liebert XDP so the unit
may be moved on the piano jacks.

Figure 6 Remove runner from pallet

9. Using the pallet jacks, raise the secured unit to the highest point that the piano jacks will allow.
Once the unit has been raised, slide the remainder of the pallet from under the Liebert XDP (see
Figure 7). Lower the Liebert XDP so that its base is approximately 1" (25.4mm) off the ground.

Figure 7 Sliding pallet from under Liebert XDP

Product Description

1.3.3 Removing Piano Jacks

Once the unit has been moved to the installation location, Emerson Network Power recommends the
following method to remove the piano jacks:

1. Lower the unit as far as the piano jacks will allow.

2. Undo all strapping holding the piano jacks to the unit.

3. Remove all cushioning material used to protect the unit from the straps and the piano jacks.

4. Use a pry bar or other lever to lift one side of the Liebert XDP enough to allow removal of the
piano jack.

5. Repeat Step 4 to remove the piano jack on the opposite side.

6. Remove the plastic bag.

4

1.4 Mechanical Considerations

1.4.1 Positioning the Liebert XDP

Install the Liebert XDP according to the site specific documentation and secure the unit to the floor.

The Liebert XDP can be installed near a wall or another Liebert XDP. However, there must be at
least 3 feet (92cm) clearance in front of the Liebert XDP as service access for components in the unit.

For additional technical information, refer to the System Design and Configuration Document for the
Liebert XD

www.liebert.com, as well as from your local Emerson Network Power representative.

Figure 8 Dimensions

™

System, SL-16655. The document is available in electronic format at Liebert’s Web site,

Product Description

A

Overall

C

Side Panel

D

Unit Base

Unit Base

Unit Dimensional Data

Table 1 Liebert XDP dimensions

Model

50/60Hz

XDP160 38 (965) 34 (864) 33-1/8 (841) 33 (838) 36 (914) 990 (449) 1067 (484)

* The dimension does not include the bezel of the disconnect switch.

A B* C D E Domestic Export

B

Overall

78"

(1981mm)

(140mm)

E

5" (127mm)

1" (25mm)

5-1/2"

11"

(279mm)

D

Floor Cutout Dimensions

The shaded area indicates

E

Dimensional Data inches (mm) Shipping Weight, lb (kg)

a recommended clearance
of 36" (914mm) for component
access.

DPN000767
Pg. 2, Rev. 6

5

Figure 9 Piping access points

Dimensions are
approximate
and subject to change
without notice.

16-1/8"

(410mm)

17-1/4"

(438mm)

10" (254mm)

19"

(483mm)

A - Return From Cooling Modules

B - Supply to Cooling Modules

D - Chilled Water Return
To Chilled Water Source

C - Chilled Water Supply
From Chilled Water Source

* Allow 8" (204mm) clearance for filter replacement.
** To ensure ensure all refrigerant flow is filtered, install the filter dryer assembly

between the discharge line of the Liebert XDP and the first bypass flow controller
or the first cooling module.

DPN000767
Pg. 3, Rev. 6

Install replaceable filter dryer assembly
in liquid supply line B.

To first cooling module
or bypass flow controller **

* Orientation
determined
by installer.

Product Description

Table 2 Unit piping outlet connection sizes, inches, OD Cu

Model Pipe Connection Point

50/60 HzABCD

XDP160 2-1/8 1-1/8 2-5/8 2-5/8

6

1.5 Electrical Information

!

!

Disconnect
Switch

Status Lamps

User Interface

Front of Liebert XDP

Enclosure Cover
Latch

Hazardous Voltage
Enclosure Cover

1.6 High Voltage Connections

Make sure the actual supply voltage and frequency correspond to the voltage and frequency indicated
on the Liebert XDP’s rating plate. The unit must be installed in accordance with national wiring reg­ulations.

Connect cables for high voltage supply to the electrical box in the Liebert XDP according to Figure 12
and make sure that the phases are correctly connected.

WARNING

Risk of electric shock. Can cause injury or death.
Disconnect all local and remote electric power before working within the unit.

CAUTION

Risk of sharp edges and heavy parts. Can cause injury or equipment damage.
Wear gloves to prevent injury to hands.
Damage to wiring or components may make unit unsafe to operate.
Use caution when installing wiring to prevent damage to factory wiring.
Install protective bushings in wiring knockouts as required.
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.

Product Description

1.6.1 Connecting High-Voltage Cables

1. Turn the Liebert XDP’s disconnect switch to the Off position (see Figure 10). Open the front
doors and push down on the enclosure cover latch to open the hazardous voltage enclosure cover.

Figure 10 Front view of Liebert XDP and electrical enclosure

7

2. Determine which knockouts in the electrical enclosure will be used and remove them (see

Liebert XD Module Condensate
Connections (optional;
depends on features
supplied with Liebert XD Module)

User Interface
(Wall Box) Wiring

Temperature/Humidity
Sensor Wiring

Alternate Knockout
for Temperature/Humidity
Sensor Wiring

Enclosure Cover Not Shown for Clarity

Figure 11).

Figure 11 Electrical enclosure knockout locations for field wiring

Product Description

3. Route the input hazardous voltage electrical power wiring through the top left knockout (see

4. Connect the ground wire to the ground lug (see Figures 12 and 13), which is in the middle left of

Figure 12 High voltage connections—60Hz

Disconnect Switch

Pump Contactors

Figure 11) to the disconnect switch L1, L2 and L3 (see Figures 12 and 13). Observe proper
phasing.

the enclosure.

Customer Power
Connection

Ground Lug

Transformer 2

Power Block

Control

Pump Fuse
Blocks

Fuse Blocks

Transformer 1

8

Figure 13 High voltage connections—50Hz

Busbar

Customer Power
Connection

Pump Circuit
Breakers

Pump Contactors

Ground Lug

Disconnect Switch

Transformer 1

Power Block

Transformer 2

Fuse Blocks

1.7 Extra Low Voltage (ELV) Connections

Extra Low Voltage 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 (refer to Figure 14).

2. Route low voltage electrical connections through the appropriate knockouts as indicated below.

3. User interface requires four thermostat-type wires (jacketed) connected to the control board (see
Figure 15).

Figure 14 Electrical enclosure knockout locations for Extra Low Voltage

Product Description

User Interface
(Wall Box) Wiring

Temperature/Humidity
Sensor Wiring

Enclosure Cover Not Shown for Clarity

Liebert XD Module Condensate
Connections (optional;
depends on features
supplied with Liebert XD Module)

Alternate Knockout
for Temperature/Humidity
Sensor Wiring

9

Field Connections—All Units

• Connect the control display panel cable to terminal block TB3 terminals 1 through 4 on the Lie­bert XDP control board as shown (refer to Figure 15). The display panel may be mounted on the
Liebert XDP’s front right door if the Liebert XDP is located in the area that it conditions. The dis­play panel must always be installed in the conditioned space.

• Connect the provided remote temperature / humidity sensor extension cable to the
factory-installed cable connected to P16 on the control board. Install the sensor in the higher­temperature portion of the cold aisle where the XD modules are located. Alternatively, it can be
placed on the return air side of the primary air mover (e.g., Liebert Deluxe System/3
room if it represents the conditions where all the XD cooling modules are located. Do not install
the sensor where ambient air may cause false readings, for example, near unsealed doors,
windows and similar areas.

Field Connections—Optional for All Units

• Connect field wiring from the optional Liebert XD cooling module condensation detection circuit
to terminal strip locations H2O (24) and XDOC (51).

• Connect optional field wiring from remote devices to remote alarm device, common alarm output,
site monitor and remote shutdown, if applicable. See terminal strip descriptions in Figure 15.

Figure 15 Liebert XDP extra low voltage field connections points

Temperature/Humidity Sensor
Cable Provided with

Control Display Panel
Four thermostatic wires
to be connected toTB3

Temperature/Humidity Sensor Board

Product Description

™

) in the

Control wiring must be Class 2 and installed
in accordance with the National Electrical Code (NEC)

Requires shielded cable

TS-3
TS-4
TS-5
TS-6

Factory-Wired
Temperature
Sensor(s)

H2O (24)
RAD1 (50)
XDOC (51)
K3COM
K3NO
K3NCL
37
38

77

78

10

2.0 PIPING

2.1 European Union Fluorinated Greenhouse Gas Requirements

Stationary air conditioning, refrigeration, heat pump equipments and stationary fire protection sys­tems in the European Community market and operating with fluorinated greenhouse gases (f-gas),
such as R407C, R134a, R410A, must comply with the F-Gas Regulation: (EC) No. 842/2006 (F-gas).
The regulation prohibits, among other actions, venting fluorinated greenhouse gases to the atmo­sphere.

The F-Gas Regulation requires operators to use use all measures that are technically feasible and do
not entail disproportionate cost to prevent leakage of these gases, to test for leakage regularly and to
recover f-gas before disposing of equipment, as well as during service and maintenance.

Refer to the full regulation for additional details.

2.2 Connection Sizes

The copper pipe connections on the Liebert XDP are:

Building Chilled Water Supply 2-5/8" OD

Building Chilled Water Return 2-5/8" OD

Refrigerant Supply 1-1/8" OD

Refrigerant Return 2-1/8" OD

Piping

2.2.1 Recommended Pipe Size

Connect the main pipes between the Liebert XDP and the Liebert XD cooling modules according to
site specific documentation and the configuration guide for the Liebert XD system.

Elbows and restrictions must be minimized to get good fluid flow.

Table 3 Supply, return pipe sizes for refrigerant loop

Pipe Function Size / Equivalent Pipe Length

Liebert XDP supply line, from Liebert XDP supply
to farthest Liebert XD cooling module

Liebert XDP return line, from farthest Liebert XD cooling
module to Liebert XDP return

From any model Liebert XDO/Liebert XDH supply
to supply line of Liebert XDP

From any model Liebert XDO/Liebert XDH return
to return line of Liebert XDP

From any model Liebert XDV/Liebert XDCF supply
to supply line of Liebert XDP

From any model Liebert XDV/Liebert XDCF return
to return line of Liebert XDP

1-1/8" OD for lengths up to 60 feet

1-3/8" OD for lengths over 60 but less than 175 feet

2-1/8" OD for lengths up to 60 feet

2-5/8" OD for lengths over 60 but less than 175 feet

1/2" OD for lengths up to 10 feet

7/8" OD for lengths over 10 but less than 25 feet

7/8" OD for lengths up to 10 feet

1-1/8" OD for lengths over 10 but less than 25 feet

1/2" OD for lengths up to 10 feet

5/8" OD for lengths over 10 but less than 35 feet

5/8" OD for lengths up to 10 feet

7/8" OD for lengths over 10 but less than 35 feet

11

2.3 Liebert XDP Interconnection with Liebert XD Cooling Modules

Liebert XD

Cool ing

Modules

Liebert XD

Cool ing

Modules

Liebert XD

Cooling
Modules

Liebert XD

Cooling

Modules

Liebert XD

Cool ing

Modules

Liebert XDP/

Liebert XDC

SLOPE—The main supply and return lines to and from the Liebert XDP/Liebert XDC
must be sloped downward toward the Liebert XDP/Liebert XDC at a rate of 1-2" per
20 feet (25.4-51mm per 6m) of pipe run. Horizontal connector lines should also be
sloped downward from the cooling modules toward the main supply and return lines.

All supply and
return mains
must be level with
or above the top
of all Liebert
XD modules

All piping must be ASTM (American Society for Testing and Materials) Type L copper pipe.
The Liebert XDP may be connected to Liebert XD cooling modules with either Liebert’s XD prefabri-

cated piping assembly or with rigid, off-the-shelf piping. In either setup, piping for the Liebert XD
system is arranged in a manner similar to piping for a chilled water system. Liebert XD cooling mod­ules are connected in parallel between main return and supply pipes going to and from the Liebert
XDP/Liebert XDC. For piping details, refer to Liebert’s XD System Design Manual, SL-16655. The

guidelines provided for pipe size must be strictly followed. Failure to size the main lines
and connection lines adequately may result in reduced cooling capacity. The critical aspects

of pipe sizing are related to refrigerant volume and pressure drop. Both must be minimized.

Figure 16 Piping arrangement for Liebert XDP/Liebert XDC used with Liebert XD cooling modules

Piping

2.4 Piping Installation Method

The assembly and connection means used for piping in the Liebert XD system are similar to that of
conventional refrigeration systems. All piping should be installed with high-temperature brazed
joints. Brazing material may be used, but soft soldering is not recommended. If brazing material is
used, the lines being brazed MUST be filled with flowing dry nitrogen during brazing to prevent
excessive oxidation and scale formation inside the piping. Prevailing good refrigeration practices
should be employed for piping supports, leak testing, dehydration and charging.

Insulate all piping lines to prevent condensation in applications where the dew point approaches the
R-134a refrigerant temperature.

2.4.1 Bypass Flow Controller

Some installations require one or more bypass flow controller(s) to ensure that the Liebert XDP’s
pumps operate within the optimum range. These devices are added to the field piping and simulate
the flow of additional cooling modules.

Each bypass flow controller should be installed with one shutoff valve to allow the controller to be dis­abled when cooling modules are added to a Liebert XD system.

If bypass flow controllers are required, they should be connected between the main supply and the
main return lines of the field piping. The connection points to the main supply and return lines should
be in a convenient and accessible location between the Liebert XDP and the first Liebert XD module
in the circuit. See Figures 17 and 18 for piping details of the bypass flow controller.

Refer to Table 4 to determine the number of bypass flow controllers needed, based on the total nomi­nal cooling capacity of the cooling modules in each Liebert XD system.

Table 4 Bypass flow controllers for a Liebert XDP-based system

Required Number

Cooling Modules ­Cumulative Model Size

32 to 63 3

64 to 95 2

96 to 127 1

128 to 160 0

of Bypass Flow Controllers

Liebert XDP

12

Figure 17 Bypass flow controller details, dimensions

7/8

”

(22mm) ID

4

”

(102mm)

Return

Main

7/8" Refrigerant Grade
Full Port Ball Valve
Field-Supplied and Field-Installed

Supply

Main

Bypass Flow Controller
(Field-Installed)

Flow Direction

Filter Dryer
Assembly

Liebert XD

Cooling

Module #1

Liebert XD

Cooling

Module #2

Coolant
Supply

Coolant
Return

Bypass Flow
Controllers

Liebert XDP

or

Liebert XDC

Figure 18 Bypass flow controller arrangement

Piping

Figure 19 Bypass flow controller piping

13

2.5 Piping Details—Shut-Off/Isolation Valves

Liebert

XDP A

Liebert
XDP B

Return

Supply

Return

Supply

Floor

Building Chilled Water Supply

Building Chilled Water Return

Isolation

valves

Isolation

valves

To allow for maintenance of the Liebert XDP, isolation valves must be installed on the chilled water
circuit (see Figure 20).

Figure 20 General piping details

Piping

2.5.1 Piping Installation Method

All piping should be installed with high temperature brazed joints. Prevailing good refrigeration prac­tices should be employed for piping supports, leak testing, dehydration and charging. Emerson Net­work Power highly recommends venting the pressure relief of the Liebert XDP (located at the top of
the receiver) outside of the conditioned space where it is open to the atmosphere.

2.5.2 Piping Mains

All refrigeration piping mains, both supply and return, should be installed with a downward pitch
toward the Liebert XDP of 1-2" for every 20 feet (25.4-51mm per 6m) of pipe run.

Install a 20-40 mesh strainer on the chilled water supply to the Liebert XDP. The strainer is needed
to prevent particles in the chilled water from entering the heat exchanger of the Liebert XDP.

2.5.3 Evacuation and Leak Check

1. Open all service valves, including those located outside of the Liebert XDP.

2. Place 150 psig (1034kPa; 10.34 bars) of dry nitrogen with a tracer of R-134a in the system.

NOTICE

Risk of overpressurization. Can cause equipment damage.
Do not exceed 150 psig (1034 kPa; 10.34 bars) in the R-134a circuit.

3. Check the system for leaks with a suitable leak finder

4. After completion of the leak testing, release the test pressure (per local code) and connect to

5. After four hours of pulling a deep vacuum, check the vacuum level and if it has not changed,

6. Pull a second vacuum to 250 microns or less. Recheck the vacuum level after 2 hours.

vacuum pump(s) at the Schrader valves.

break the vacuum with dry nitrogen.

14

2.6 Checklist for Proper Installation

___ 1. Unpack and check received material.
___ 2. Position the Liebert XDP and secure it to the floor.
___ 3. Wire high voltage connections.
___ 4. Wire low voltage connections.
___ 5. Connect the building chilled water piping to the Liebert XDP.
___ 6. Connect the Liebert XD cooling module piping to the Liebert XDP.
___ 7. Check the system for leaks.
___ 8. Hold a vacuum on the system.
___ 9. Charge the system with refrigerant.
___ 10. Make sure that all piping has proper insulation.

Piping

15

3.0 CHECKLIST FOR LIEBERT XDP STARTUP

!

CAUTION

Risk of piping and component rupture. May cause injury or equipment damage.
Closing service valves may isolate liquid refrigerant, causing high pressure and rupture of

piping. Do not close valves without following recommended procedures for repair,
maintenance and replacement of components. Install pressure relief valves in field piping
that may become isolated by service valves.

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

1. Verify that bypass flow controllers were installed (if applicable), see Table 4.

2. Check all isolation ball valves in the Liebert XDP and Liebert XD cooling module and verify that
all are open.

3. Check rotation of the Liebert XDP’s pumps.
On 460V units only, use the rotation device provided—this device must be held against the

pump housing—at the inspection screw prior to energizing the pumps—counterclockwise indi­cates proper rotation; clockwise indicates incorrect rotation.

On 208V units only, view the LED indicator on the pump—Green indicates proper rotation;
Green and Red indicate incorrect rotation.

Table 5 Liebert XDP pump light indicator—208V and 400V units

Indicator Lights

Green Red

Off Off The electricity supply has been switched off or the pump has been cut out by the thermal switch.

On Off The electricity supply has been switched on. Normal operation.

On On The electricity supply has been switched on. The direction of rotation is wrong.

Checklist for Liebert XDP Startup

Description

4. Check rotation of fans on Liebert XD cooling module units.

5. Verify that air is being discharged into the cold aisle.

6. Confirm that the total calculated refrigerant R-134a amount has been properly charged into the
system (see 3.1 - Filling the Pumped Circuit—R-134a).

7. Confirm that the remote temperature/humidity sensor provided has been installed in the correct
location.

The correct location is near the return side of a main air mover, such as a Liebert Deluxe
System/3. If more than one Liebert XDP is installed, use a different location for each remote sen­sor for best temperature/humidity calculation.

The Liebert XDP system is now ready to be turned ON.

1. Turn On all of the Liebert XD cooling module fans.

2. Turn the Liebert XDP On via its user interface (I/O button). Allow the system to attempt to start
for at least 2 minutes.

If the Liebert XDP pump cannot maintain flow and continues to switch over due to starting diffi­culties, proceed to Step 4 and refer to 6.0 - Troubleshooting.

3. If constant flow is established, wait until the Liebert XDP has been operating for 10-15 minutes,
then verify that the refrigerant level in the receiver sight glass is between the second and third
level (see Figure 21). Add or remove charge, if necessary.

4. Check pressure differential functionality:
The Liebert XDP system should be On. If it is Off:
a. Turn On the Liebert XD cooling module fans
b. Turn the Liebert XDP On via user interface (I/O button).

16

If there is no “Loss of Flow” alarm present—This suggests that there is flow. Test the

Operation above sight glass #3 can
make the system operate erratically
and reduce cooling capacity - Reduce
charge to recommended level.

Recommended operating level

Acceptable operating level

Operation below sight glass #1 m a y
cause loss of flow or cooling. Add
charge to reach recommended level.

For lightly loaded systems,
the recommended operating
level is sight glass #2.

Sight Glasses 1, 2 & 3

pressure differential by closing the ball valve on either the suction line or discharge line to
stop the flow.

This should prompt an alarm for “loss of flow on P1.” This alarm confirms that the switch has
opened on low pressure (below 6 psi; 41kPa; 0.41 bars).

If there is a “Loss of Flow” alarm present—This suggests that there is no flow. Verify
that this is correctly annunciated by looking at the sight glass in the receiver. If a true no-flow
condition exists, the level will not move.

However, if there is flow, but the differential reading is faulty, the level will slowly
drop, indicating flow, while the loss of flow alarm is annunciated.

Check the pressure differential physically by making sure that the electrical connections are
properly connected. Then check the pressure differential electrically by making sure that the
unit has 24VAC across it.

Figure 21 System R-134a liquid level

Checklist for Liebert XDP Startup

3.1 Filling the Pumped Circuit—R-134a

1. Connect a charging manifold to the service port of the receiver outlet valve.

2. Purge the hoses.

3. Calculate the amount of R-134a refrigerant needed to charge the system, using the values in

Tables 6, 7, 8 and 9; for assistance, refer to 3.1.1 - Calculating Refrigerant Charge—
Example. The section includes a worksheet to calculate system refrigerant charge requirements.

4. Weigh in the calculated charge.

5. After adding the calculated charge, allow the system to sit 15 to 30 minutes to reach equilibrium.
Observe the refrigerant level through the sight glasses of the receiver. The level should be above
the second sight glass at a minimum when the Liebert XDP is off.

6. If the refrigerant level is improper, the charge must be adjusted.
If the level is too high or too low, recalculate the required charge and reduce or increase the

amount as needed to reach the proper level.

NOTE

All lengths in Tables 7, 8 and 9 are actual pipe lengths, not equivalent pipe lengths.

NOTE

System refrigerant volume calculations derived from Tables 6, 7, 8 and 9 are based on a fully
loaded system. Additional charge may be required for lightly loaded systems.

17

Checklist for Liebert XDP Startup

Table 6 System R-134a charge for a Liebert XDP with any model Liebert XDH/Liebert

XDO/Liebert XDV/Liebert XDCF

Refrigerant Charge,

lb (kg)

157 lb. (65.7kg) Liebert XDP

3.55 lb. (0.66kg) Liebert XDO

2.32 lb. (1.05kg) Liebert XDV

5.32 lb. (2.41kg) Liebert XDH

1.41 lb. (0.64kg) Liebert XDCF

Per Liebert XD Unit
(Excludes Connector Lines
to and from Liebert XD Cooling Module)

Table 7 System refrigerant charge for the supply and return mains

Refrigerant Charge,

lb/foot (kg/m)

0.45 (0.67) Main supply actual length per 1-1/8" OD copper tubing

0.68 (1.01) Main supply actual length per 1-3/8" OD copper tubing

0.28 (0.42) Main return actual length per 2-1/8" OD copper tubing

0.43 (0.64) Main return actual length per 2-5/8" OD copper tubing

Supply/Return Main Length and Diameter

Table 8 R-134a refrigerant charge for hard-piped connector lines to and from any model

Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF

Refrigerant Charge,

lb/foot (kg/m)

0.08 (0.12) 1/2" OD Liebert XDO/Liebert XDH/Liebert XDV/Liebert XDCF supply connector actual

0.13 (0.19) 5/8" OD copper tubing Liebert XDV/Liebert XDCF supply connector actual length

0.26 (0.39) 7/8" OD Liebert XDO/Liebert XDH supply connector actual length "

0.02 (0.03) 5/8" OD copper tubing Liebert XDV/Liebert XDCF return connector actual length

0.04 (0.06) 7/8" OD copper tubing Liebert XDV/Liebert XDCF return connector actual length

0.04 (0.06) 7/8" OD copper tubing Liebert XDH/Liebert XDO return connector actual length

0.07 (0.1) 1-1/8" OD copper tubing Liebert XDH/Liebert XDO return connector actual length

Hard-Piped Connector Length and Diameter

length

Table 9 R-134a refrigerant charge for Flex Pipe connector lines to and from any model

Liebert XDO/Liebert XDH/Liebert XDV/Liebert XDCF

Refrigerant Charge, lb. (kg) Metal Flex Pipe Connector Length

Supply Line Diameter 1/2"

0.3 lb. (0.14) 4 ft. Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF supply

0.5 lb. (0.23) 6 ft. Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF supply

0.7 lb. (0.32) 8 ft. Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF supply

0.8 lb. (0.36) 10 ft. Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF supply

Return Line Diameter 5/8"

0.01 lb. (0.01) 4 ft. Flex Pipe existing Liebert XDV systems

0.02 lb. (0.01) 6 ft. Flex Pipe existing Liebert XDV systems

0.03 lb. (0.01) 8 ft. Flex Pipe existing Liebert XDV systems

0.03 lb. (0.01) 10 ft. Flex Pipe existing Liebert XDV systems

Return Line Diameter 1"

0.13 lb. (0.05) 4 ft Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF supply

0.2 lb. (0.09) 6 ft Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF supply

0.27 lb. (0.12) 8 ft Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF supply

0.33 lb. (0.15) 10 ft Flex Pipe Liebert XDH/Liebert XDO/Liebert XDV/Liebert XDCF supply

18

3.1.1 Calculating Refrigerant Charge—Example

Using Tables 6, 7, 8 and 9, calculate the refrigerant charge of the individual sections of your Liebert
XD system. Add the calculated charge amounts to determine the amount of R-134a refrigerant
required for one system combining a Liebert XDP with Liebert XD cooling modules (Liebert XDCF,
Liebert XDH, Liebert XDO and Liebert XDV). The example below combines one Liebert XDP with 20
Liebert XDV8 cooling modules.

Table 10 Calculating refrigerant charge—example

Components

Liebert XDP 1 157 157

Liebert XDV8 Cooling Modules 20 2.32 46.4

Supply Main, 1-1/8" 100 0.45 45

Return Main, 2-1/8" 100 0.28 28

Liebert XDV 1/2" supply Liebert XD Flex Pipes 20 0.8 16

Liebert XDV 5/8" return Liebert XD Flex Pipes 20 0.03 0.6

Table 11 Worksheet to calculate refrigerant charge

Components

Number of Units

or Piping Length,

feet

Number of Units

or Piping Length

Checklist for Liebert XDP Startup

Pounds Per
Component Total, lb.

Total 293

Pounds Per
Component Total

19

Total

4.0 MICROPROCESSOR CONTROL

Up Arrow Key

Status Display

On/Off Key

Alarm Silence Key

Down Arrow Key

4.1 Feature Overview

The microprocessor control for the Liebert XDP features an easy-to-use menu-driven LCD. The
menus, control features and circuit board details are described in this section.

Figure 22 User interface

Active alarms are displayed on the LCD screen and sound an audible beep. To silence an alarm, press
the Alarm Silence/Help key as prompted on the display.

Microprocessor Control

Setpoints, DIP switch settings and other selections were made during factory testing of the unit based
on typical operating conditions. (Other default selections were made according to options included
with the unit.)

ADJUST THE FACTORY DEFAULTS ONLY IF THEY DO NOT MEET YOUR SPECIFICATIONS.

Allowable ranges are displayed by pressing the Help key. A password will be required (if enabled) to
change setpoints, time delays, etc.

The display normally shows the leaving refrigerant temperature on the first line and alternates
between the dew point and the number of alarms present on the second line.

4.1.1 Display

To turn the unit On, press the On/Off (I/O) key after power is applied to the Liebert XDP.

To turn the unit Off, press the On/Off (I/O) key before power is disconnected.

Table 12 User interface keypad functions

Keypad Function

On/Off (I/O) Turns the unit On or Off (top far left keypad)

Menu Enables the user to access the program menu to change setpoints, alarms, etc. (top near left)

Up Arrow Key

Escape (Esc) Allows user to move back to a previous menu (top far right)

Alarm Silence

Down Arrow
Key

Enter

Raises the value of displayed parameter while in a set mode (set points, time, etc).(arrow, top
near right)

If an alarm is present, press this key to silence the alarm. Help text will appear if this key is
pressed when no alarm is present (bottom left)

Lowers the value of displayed parameter while in a set mode (set points, time, etc).(arrow,
bottom near right).

After setting a control value, press ENTER to store the information in the microprocessor
(bottom right).

20

4.2 Controls

The Microprocessor Control for the Liebert XDP features an easy-to-use, menu-driven liquid crystal
display. The menus, control features and circuit board details are described in this section.

4.2.1 Feature Overview

The Liebert XDP maintains the refrigerant being pumped to Liebert XD cooling modules at a temper­ature above the room dew point, preventing condensation.

4.3 Main Menu

Press the MENU key to display the Main Menu. The menu selections are:

• SETPOINTS

• STATUS

• ACTIVE ALARMS

•ALARM HISTORY

•TIME

•DATE

• SETUP OPERATION

• SETPT PASSWORD

• SERVICE PASSWORD

• CALIBRATE SENSOR

• ALARM ENABLE

• ALARM TIME DELAY

• COM ALARM ENABLE

• CUSTOM ALARMS

• CUSTOM TEXT

•DIAGNOSTICS

• END OF MENU

Microprocessor Control

4.3.1 Viewing or Changing Settings

To access a menu option:

1. Use the Up or Down arrow keys to scroll to the menu option.

2. Press the ENTER button to view the current setting.

3. To change the setting, use the Up or Down arrow keys.

4. Press ENTER to save the change.

21

4.3.2 SETPOINTS

Selecting SETPOINTS from the Main Menu will reveal the following menu items:

Table 13 Setpoint functions, default values and allowable ranges

Menu Item Function Default, °F (°C) Range, °F (°C)

MIN TEMP SP Minimum room temperature setpoint 72 (22) 50-80 (10-27)

HI CW TEMP High chilled water temperature setpoint 55 (13) 35 to 95 (2-35)

HI AIR TEMP High room air temperature setpoint 80 (27) 35 to 95 (2-35)

LO AIR TEMP Low room air temperature setpoint 65 (18) 35 to 95 (2-35)

* For optimal cooling performance, the minimum temperature setpoint should be at least 1-2° below the expected temperature at

the remote sensor, which may require additional consideration of the remote sensor location or minimum temperature setting. If
the minimum temperature setpoint is set above the typical remote temperature sensor reading, this will reduce the Liebert XD
cooling output and, in extreme cases, cause erratic Liebert XD performance.

MIN TEMP SP

Minimum Room Temperature Setpoint—This is used to keep the room temperature above the set­point. The Liebert XDP can lower the room temperature too much depending on the room dew point
and load. This setpoint will back off the cooling to keep the room temperature above this temperature.

NOTE

This is not a true room temperature setpoint. The Liebert XDP has no heaters; it will try to cool
as much as possible. If it is able to cool the room to this setpoint, it will back off its cooling
capability to try to keep the room temperature at or above this setpoint.

Microprocessor Control

HIGH CW TEMP

High Chilled Water Temperature Setpoint—There could be many reasons that the chilled water tem­perature is above this setpoint (e.g., chiller problem, control valve failure, etc.) This is the setpoint at
which the HIGH CW TEMP alarm will be activated.

HI AIR TEMP

High Room Air Temperature Setpoint—This is the setpoint at which the HIGH REMOTE TEMP and
HIGH LOCAL TEMP alarms will be activated.

LOW AIR TEMP

Low Room Air Temperature Setpoint—This is the setpoint at which the LOW REMOTE TEMP and
LOW LOCAL TEMP alarms will be activated.

4.3.3 STATUS

The user can check the status of the control valve, pump operation, and refrigerant and chilled water
temperature.

CONTROL VALVE—0-100%
PUMP 1—On/Off
PUMP 2—On/Off
REFRIG T—Refrigerant temperature 0-100° F
CW TEMP—Chilled Water temperature 0-100° F

4.3.4 ACTIVE ALARMS

This submenu allows the user to review any present alarms. If no alarms are present, the screen will read
“No Alarms Present.” If any alarms are occurring, the screen will display “Alarm XX of YY,” followed by
the alarm text (“XX” is the reference number of the alarm shown, “YY” is the total number of alarms).

If more than one alarm is present, use the Up or Down arrow keys to scroll through the alarms.

4.3.5 ALARM HISTORY

This submenu allows the user to review the 60 most-recent alarms. The first line of the screen will
show the alarm number—01 being the newest—and the name of the alarm. The second line of the
screen will show the most recent alarm’s date and the time in 24 hour format. Use the Up or Down
arrow key to scroll through the alarm history list.

22

4.3.6 TIME

To change the time, press ENTER to select the function, then use the Up or Down arrow key to
change the first character, press ENTER to store, then press the Up or Down arrow key to change the
second character, press ENTER to store, etc.

NOTE

The clock uses the 24-hour system (for example, 17:00 would be 5:00 PM). The date and time
are kept current even when the control board is not powered.

4.3.7 DATE

To change the date, press ENTER, then use the Up or Down arrow key to change the first character,
press ENTER to store, press the Up or Down arrow key to change the second character, etc.

4.3.8 SETUP OPERATION

NOTE

None of these setpoints should be changed before consulting an Emerson Network Power
representative. Changing any of these setpoints could drastically affect the system.

Selecting Setpoint/Setup from the Main Menu will display the following selections:

Table 14 Setup operation functions default values and allowable ranges.

Menu Item Function Default Range

RESTART Restart time delay 0.1 min

C/F DEGREES Celsius or Fahrenheit F C or F

PUMP START TD Pump start time delay 10 sec 3 - 120 sec

PUMP WAIT TD Pump wait time delay 10 sec 3 - 120 sec

PUMP OFF TD Pump off time delay 5 sec 5 - 120 sec

LEAD PUMP Lead Pump Pump 1 Pump 1 / Pump 2

DIPSWCH DIP switch status NA NA

VALVE TIME Control valve travel time 60 sec 50 - 250 sec

Microprocessor Control

0 to 9.9 min

(0 = manual restart)

Use the Up and Down arrow keys to scroll through the submenu, then press the ENTER button to access
a function. To make changes or review the current setting, see 4.3.1 - Viewing or Changing Settings.

NOTE

Setpoints and system setup parameters are kept in non-volatile memory.

RESTART TIME DELAY

This function specifies the time for the unit to restart after main power is restored to the unit. If sev­eral systems are operating, the time delays should be set to different values to cause a sequential
start. Delay can be set from 0.1 minutes (6 seconds) to 9.9 minutes. Setting the value to “NO!” will
prevent the unit from restarting when power is restored. In this case, the unit must be restarted man­ually by pressing the “On/Off” key.

To make changes or review the current setting, see 4.3.1 - Viewing or Changing Settings.

C/F DEGREES

The control can be selected to show readings and setpoints in either degrees Fahrenheit (F) or
Celsius (C). To make changes or review the setting, see 4.3.1 - Viewing or Changing Settings.

PUMP START TD

The user may set a pump start time delay (in seconds) to ensure that refrigerant begins flowing when
the pump starts. If refrigerant does not begin flowing before this delay expires, the pump will stop for
a period that the user may also specify (see PUMP OFF TD). After this delay, the pump will again
begin its startup sequence.

To make changes or review the current setting, see 4.3.1 - Viewing or Changing Settings.

23

Microprocessor Control

PUMP WAIT TD

The user may set the pump wait time delay to prevent the pump from continuing to run when refrig­erant is not flowing. When the control detects a loss of refrigerant flow, the pump continues operating
for the period specified in the PUMPWAIT TD.

If refrigerant flow resumes during the specified interval, the pump will continue operating. If the wait
time expires and refrigerant flow has not resumed, the pump will shut down, activate an alarm for
loss of flow to the pump and the second pump will be started.

To make changes or review the current setting, see 4.3.1 - Viewing or Changing Settings.

PUMP OFF TD

The user can set the amount of time a pump will remain off when refrigerant flow is interrupted or
stops. After the time delay has expired, the control will try to start a pump—unless there is a problem
with the building chilled water system or if the refrigerant temperature sensor has failed.

To make changes or review the current setting, see 4.3.1 - Viewing or Changing Settings.

LEAD PUMP

The user can select which pump is the lead pump, either pump #1 or pump #2. For example, if
pump #1 is selected, it will be the primary pump and will switch to the standby pump (the pump that
is not selected) on a loss of flow after a programmed time delay has elapsed.

To make changes or review the current setting, see 4.3.1 - Viewing or Changing Settings.

DPSWCH

This menu displays the status of the eight-position DIP switch on the Liebert XDP control board. If a
selector is beside the numeral “1,” the switch is On. If a selector is beside the numeral “0,” the switch
is Off. For proper operation, DIP switches 1-7 MUST be off and DIP switch 8 MUST be on.

Table 15 Liebert XDP DIP switches and factory settings

DIP Switch Factory Setting

1Off

2Off

3Off

4Off

5Off

6Off

7 Off

8 On = Liebert XDP; Off = Liebert XDWP

24

Microprocessor Control

VALVE TIME

This value is the number of seconds it takes the control valve to travel from fully closed to fully open.
If the control loses the analog feedback position from the control valve, the control will close the valve,
then calculate how long to open the valve for the current call for cooling.

For example, if VALVE TIME is set to 60 seconds and there is a 50% call for cooling, the valve will
open for 30 seconds, leaving the valve halfway open. To make changes or review the current setting,
see 4.3.1 - Viewing or Changing Settings.

Scroll through this submenu by using the Up or Down arrow key. To make changes or review the cur­rent setting, see 4.3.1 - Viewing or Changing Settings.

For example, to change the DEWPOINT MARGIN:

a. From the main Status display, press MENU.
b. Scroll to the SETPOINTS using the Up or Down arrow key.
c. Press ENTER to select the SETPOINTS submenu.
d. Scroll to DEWPOINT MARGIN using the Up or Down arrow key.
e. Press ENTER
f. Use the Up arrow key to increase the value or use the Down arrow key to lower the value.
g. Press ENTER to store.

NOTE

Setpoints and system setup parameters are kept in non-volatile memory.

4.3.9 Password Security—SETPT PASSWORD and SERVICE PASSWORD

Setpoints, setup operations and alarm settings may be secured with three-digit passwords to prevent
unauthorized changes. The password function for SETPT PASSWORD and for SERVICE PASS­WORD is enabled by default. Passwords are enabled or disabled through DIP switch #8.

• To enable the password security feature, open the user interface display cover and set
DIP switch #8 to the Off position, then close the cover.

• To disable the password security feature, open the user interface display cover and set
DIP switch #8 to the On position, then close the cover.

Change Password—SETPT PASSWORD

The factory default SETPT PASSWORD is “123”—this password protects setpoints and some alarm
settings. To change the SETPT PASSWORD:

1. Press the MENU key to display the Main Menu.

2. Use the Up or Down arrow keys to scroll to the SETPT PASSWORD function.

3. Press ENTER to access the SETPT PASSWORD function. The LCD will display three zeros (000).

4. Enter the present, three-digit password.
a. Use the Up or Down arrow key to enter the first number.
b. Press the ENTER button to select the second number in the password.
c. Use the Up or Down arrow key to enter the second number.
d. Enter the third number by repeating Steps b and c.
e. Press the ENTER button to accept the password. The LCD will display the message

PASSWORD OK.

5. Press the ENTER button; the LCD displays the message ENTER NEW PSW and the current
password. The first numeral will be selected.

6. Use the Up or Down arrow key to enter the first number of the new password. Press the ENTER
button to select the second numeral in the password.

7. Use the Up or Down arrow key to enter the second number of the new password. Press the
ENTER button to select the third numeral in the password.

8. Use the Up or Down arrow key to enter the third number of the new password. Press the ENTER
button to save the new password.

25

Microprocessor Control

Change Password—SERVICE PASSWORD

The factory default SERVICE PASSWORD is “123”—this password protects setup operations and
more-critical alarm settings. To change the SERVICE PASSWORD:

1. Press the MENU key to display the Main Menu.

2. Use the Up or Down arrow key to scroll to the SERVICE PASSWORD function.

3. Press ENTER to access the SERVICE PASSWORD function. The LCD will display three zeros (000).

4. Enter the present, three-digit password.
a. Use the Up or Down arrow key to enter the first number.
b. Press the ENTER button to select the second number in the password.
c. Use the Up or Down arrow key to enter the second number.
d. Enter the third number by repeating Steps b and c.
e. Press the ENTER button to accept the password. The LCD will display the message

PASSWORD OK.

5. Press the ENTER button; the LCD displays the message ENTER NEW PSW and the current
password. The first numeral will be selected.

6. Use the Up or Down arrow key to enter the first number of the new password. Press the ENTER
button to select the second numeral in the password.

7. Use the Up or Down arrow key to enter the second number of the new password. Press the
ENTER button to select the third numeral in the password.

8. Use the Up or Down arrow key to enter the third number of the new password. Press the ENTER
button to save the new password.

4.3.10 CALIBRATE SENSOR

The local and the remote temperature and humidity sensors can be calibrated by selecting this menu
item. The temperature sensor can be calibrated ± 5°F and the humidity sensor can be calibrated
±10% RH. To prevent coil condensation that could damage the Liebert XDP, the sensors must be cali­brated to a known source.

4.3.11 ALARM ENABLE

Some alarms can be disabled or enabled as part of the user’s customized setup. An alarm that has
been disabled will not report to the wall box beeper nor to the common alarm relay. Alarms are
enabled by default.

Use the Up or Down arrow key to select a particular alarm; “YES” enables the alarm, “NO” disables
the alarm. Press ENTER to save the change.

4.3.12 ALARM TIME DELAY

Some alarms can be programmed with a time delay as a means of preventing nuisance alarms. This
function specifies the amount of time an alarm must be present before the Liebert XDP recognizes
and annunciates the alarm. If the alarm condition goes away before the time delay has expired, the
alarm will not be recognized, and the time delay timer will be reset.

4.3.13 COM ALARM ENABLE

Each individual alarm can be selected to energize or not to energize the common alarm relay. If the
energize common alarm function is set to YES, the relay is energized immediately as the alarm is
annunciated and de-energized when the alarm condition goes away (only after the alarm has been
recognized). If the alarm is completely DISABLED, the alarm has no effect on the common alarm
relay.

Use the Up or Down arrow key to scroll to a particular alarm, press the ENTER button to select it,
then press the ENTER button to change the state (Yes or No).

26

4.3.14 CUSTOM ALARMS

This is the menu where the user selects the alarm message that will be displayed when there is an
input to the customer alarm input on the control board. This menu has four choices: one user-defined
custom message (see CUSTOM TEXT below for details) and three preprogrammed messages:

• SMOKE DETECTED

• CUSTOM 1 (default custom message. If the user enters a custom text message, that custom text
will replace “CUSTOM 1.”)

• WATER FLOW LOSS

• STANDBY UNIT ON

1. Press the ENTER button to access the menu

2. Use the Up or Down arrow key to view the messages.

3. Press the ENTER button to select the message to be displayed.

4.3.15 CUSTOM TEXT

This menu permits the user to set up a custom text message with a maximum length of 16 characters.
The message may use any of the following characters or a blank space:

ABCDEFGHIJKLMNOPQURSTUVWXYZ#%*-0123456789

This custom text can be designated as the custom alarm text in the “CUSTOM ALARMS” menu (see
CUSTOM ALARMS above). To define the message:

1. Press the ENTER button to access the menu.

2. Use the Up or Down arrow key to change the character with the pointer below it.

3. Press the ENTER button to go to the next character.

4. Repeat the steps for all characters in the message (maximum of 16 characters).

5. Press the ENTER button to accept new custom text.

Microprocessor Control

4.3.16 DIAGNOSTICS

This allows the user to perform checks on inputs, outputs, and conduct a test of the Liebert XDP con­trol board from the wall box.

Entering the “TEST OUTPUTS” will interrupt system operation. Selecting “TEST INPUTS” or “TEST
MICRO” will not interrupt system operation. Pressing ENTER and selecting “TEST OUTPUTS” will
permit the user to toggle the following outputs On and Off:

PUMP 1—On/Off
PUMP 2—On/Off
CTR VALVE XX.Xma—OPEN/CLOSE (control valve and 4-20mA feedback signal)
GREEN LAMP—On/Off
RED LAMP—On/Off
COMMON ALARM—On/Off

Pressing ENTER and selecting “TEST INPUTS” will permit the user to read the following inputs:

INPUT POWER—On/Off
CONDENSATION—On/Off (condensation detection)
DIFF PRESSURE—On/Off (differential pressure switch)
CUSTOMER ALARM—On/Off

Pressing ENTER and selecting “TEST MICRO” will permit the user to test the microcontroller and
associated circuitry on the Liebert XDP control board.

27

5.0 ALARM DESCRIPTIONS AND SOLUTIONS

5.1 Alarm Descriptions

NOTE

Alarms must be acknowledged before they can be reset. To acknowledge or silence an alarm,
press the ALARM SILENCE / ? key.

• LOSS OF FLOW P1—Activated when Pump 1 is commanded to run and the differential pres­sure switch does not sense differential pressure (set at 6 psi; 41kPa; 0.41 bars). After attempting
to start Pump 1 for 120 seconds (including time delays), the Liebert XDP will automatically
switch to the other pump to establish flow.

• LOSS OF FLOW P2—Activated when Pump 2 is commanded to run and the differential pres­sure switch does not sense differential pressure (set at 6 psi; 41kPa; 0.41 bars). After attempting
to start Pump 2 for 120 seconds (including time delays), the Liebert XDP will automatically
switch to the other pump to establish flow.

• SHORT CYCLE—Activated when the Liebert XDP is trying to establish flow (differential pres­sure), and it is unable to do it. The Liebert XDP will attempt to establish flow for 4 minutes on
each pump, for a total of 8 minutes. If this “cycling” occurs within 30 minutes and the Liebert
XDP still does not establish flow, a SHORT CYCLE alarm will be present. This alarm will shut
down the Liebert XDP. Main power (disconnect switch) must be turned Off, then back On to clear
this alarm. The cycling time for the SHORT CYCLE alarm can be adjusted from the default of 30
minutes; the range is from 10 minutes to 60 minutes.

• CONDENSATION!—Activated when water is detected at the Liebert XD cooling module (24VAC
is applied to the condensation input on the control). When this alarm is active, the control will
raise its refrigerant control point by 4°F (-16°C). Alarm will reset when the 24VAC signal ends or
main power is removed.

• VALVE FAILURE—Activated when the chilled water control valve has been commanded by the
control to open or close and no change is detected from the valve-position signal. The control will
close the valve and then try to control the control valve based on its travel time. Main power (dis­connect switch) must be turned Off, then back On to clear this alarm.

• CUSTOMER ALRM—Activated when 24VAC signal is applied to the customer alarm input on
the control board. Alarm will reset when the 24VAC signal is taken away.

• HIGH CW TEMP—Activated when entering chilled water temperature exceeds the user speci­fied setpoint. The alarm will reset itself when the entering chilled water temperature drops below
the setpoint.

• FAILED CW SENSOR—Activated when the control stops receiving a signal from the entering
chilled water temperature sensor. The alarm will reset itself when the temperature sensor signal
is re-established.

• HIGH REMOTE TEMP & HIGH LOCAL TEMP—Activated when the remote or local temper­ature exceeds the user specified setpoint. The alarm will reset itself when the room temperature
drops below the setpoint.

• LOW REMOTE TEMP & LOW LOCAL TEMP—Activated when the remote or local tempera­ture is below the user-specified setpoint. The alarm will reset itself when the room temperature
raises above the setpoint.

• REMOTE SENS PROB—Activated when no signal is present from the remote temperature or
humidity sensors. Alarm will reset when the temperature and humidity signals are re-estab­lished.

• LOCAL SENS PROB—Activated when no signal is present from the local temperature or
humidity sensors or when communication with the display is lost. The alarm will reset when the
temperature and humidity signals are re-established.

• HIGH REFRIG TEMP—Activated when the refrigerant temperature exceeds the user-specified
setpoint. The alarm will reset itself when the refrigerant temperature drops below the setpoint.

• LOW REFRIG TEMP—Activated when the refrigerant temperature drops 1.5°F (1°C) below the
refrigerant temperature control point. The alarm will reset itself if the refrigerant temperature
rises before the control shuts down because of low refrigerant temperature.

Alarm Descriptions and Solutions

28

• REFRIG SENS FAIL—Activated when the control stops receiving a signal from the refrigerant
temperature sensor. If this alarm becomes active, the control will close the control valve over a
9-minute period. This alarm will shut down the Liebert XDP. Main power must be (disconnect
switch) must be turned Off, then back On to clear this alarm.

• LOSS OF POWER—Activated when the unit is On and operational and 24VAC power to the con­trol is lost. This alarm will be emitted when power is restored to the control. The Liebert XDP will
restart at a user-defined time delay after power is restored. The alarm will reset itself after 30
seconds of run time.

5.2 Red and Green Lamp Indicators

• The Green lamp will be on only when The Liebert XDP is On and running with no alarms.

• The Red lamp will be on if the unit is On and running with an active alarm, or if the unit is shut
down because of a certain alarm.

• The Red lamp will flash when an alarm is being annunciated. The Red lamp will stop flashing and
the beeper in the display will stop beeping when the ALARM SILENCE / ? key is pressed.

5.3 Alter Alarm Settings

5.3.1 Enable or Disable Alarms

At the user’s discretion, some alarms may be enabled or disabled. If an alarm is disabled, the alarm
condition will not be monitored and will not trip, will not be in ACTIVE ALARMS, will not be in
ALARM HISTORY and will not be annunciated.

Alarm Descriptions and Solutions

These alarms may be enabled or disabled:

• LOSS OF FLOW P1—loss of refrigerant flow with Pump 1 alarm

• LOSS OF FLOW P2—loss of refrigerant flow with Pump 2 alarm

• VALVE FAILURE—chilled water control valve failure alarm

• CUSTOMER—customer alarm

• HI RMT TEMP—high remote temperature alarm

• LO RMT TEMP—low remote temperature alarm

• HI LCL TEMP—high local temperature alarm

• LO LCL TEMP—low local temperature alarm

To determine whether an alarm is enabled or disabled:

1. Press the MENU key.

2. Use the Up and Down arrow keys to move to the ALARM ENABLE menu.

3. Press the ENTER key to access the menu. Use the Up and Down arrow keys to move through the
menu and view which alarms are enabled or disabled. (“YES” means that the alarm is enabled,
“NO” means that the alarm is disabled.)

To change an alarm from enabled to disabled, or vice versa

1. Determine whether the alarm is enabled or disabled (see above).

2. Use the Up and Down arrow keys to scroll to the alarm to be changed.

3. Press the ENTER key. (The control will ask for a service password if passwords are enabled. Use
the Up and Down arrow keys and ENTER key to enter the three-digit password.)

4. Press the ENTER key again to change the alarm.

5. Press the ESC key two to three times to return to the main display.

29

5.3.2 Increase or Decrease Alarm Time Delays

An alarm time delay is the time that the a condition must exist before the control activates an alarm
for that condition. This can be used as a filter to prevent nuisance alarms from transient events.

These alarms may have their time delays changed:

• CUSTOMER—customer alarm

• HIGH CW TEMP—high chilled water temperature alarm

• HI RMT TEMP—high remote temperature alarm

• LO RMT TEMP—low remote temperature alarm

• HI LCL TEMP—high local temperature alarm

• LO LCL TEMP—low local temperature alarm

• LOW REFRIG TEMP—low refrigerant temperature alarm

To view the time delay for an alarm:

1. Press the MENU key.

2. Use the Up and Down arrow keys to move to the ALARM TIME DELAY menu. Press the ENTER
key to enter into the menu. Use the Up and Down arrow keys to move through the menu and view
the alarm time delays.

To change the time delay for an alarm:

1. Press the ENTER key. (The control will ask for a service password if passwords are enabled. Use
the Up and Down arrow keys and ENTER key to enter the three-digit password when prompted.)

2. Press the ENTER key again on the alarm to select the alarm to be changed.

3. Use the Up and Down arrow keys to change the alarm time delay.

4. Press the ENTER key to record the change.

5. Press the ESC key two to three times to return to the main display.

Alarm Descriptions and Solutions

5.4 System Shutdown Causes

Unit Is Off By Refrig Sens Fail

The control has lost its signal from the refrigerant temperature sensor. The control has no way of
controlling the refrigerant temperature, so the unit is shut off. Main power (disconnect switch)
must be turned Off, then back On to clear this alarm.

Unit Is Off By High CW Temp

The entering chilled water temperature is too high to keep the refrigerant pump(s) running nor­mally. If there is a HIGH CW TEMP alarm and the refrigerant pump loses flow (differential pres­sure), the Liebert XDP will immediately attempt to restart the pumps and re-establish flow. If
flow is still not established, then the Liebert XDP will go into a pre-chill mode. The Liebert XDP
can attempt to start again only if the entering chilled water temperature drops below the HIGH
CW TEMP setpoint.

Unit Is Off By Pump Short Cycle

The control was unable to get a pump started upon startup or after a loss of differential pressure.
The control looks at the SHORT CYCLE time delay. If it cannot establish differential pressure
within that amount of time, the unit is shut down. This time is adjustable through the SHORT
CYCLE alarm time delay. Main power (disconnect switch) must be turned Off, then back On to
clear this alarm.

Unit Is Off By Low Refrig Temp

The control was unable to raise the refrigerant temperature to the calculated refrigerant temper­ature control point. The unit is shut down because if the control cannot raise the refrigerant tem­perature to the calculated refrigerant temperature control point, water may condense on the
refrigerant piping and receiving coils. Main power (disconnect switch) must be turned Off, then
back On to clear this alarm.

30

6.0 TROUBLESHOOTING

Table 16 Troubleshooting the XDP

Symptom Possible Cause Check or Remedy

No main power Check L1, L2 and L3 for rated voltage.

Loose electrical connections Tighten connections.

Pump will not energize

Pump will not run

Pump noisy

Liebert XDP (Pump)
suddenly stops

Pipe rattle Loose pipe connections Check pipe connections

Chilled water valve not
working

Actuator motors

Motor burnout

Main 24 VAC fuse trips

Unstable pump
operation

Overloads tripped Allow pump to cool. Check amp draw.

Tripped circuit breaker Check circuit breaker to pump(s).

Incorrect phase wiring See Table 5.

No chilled water

Isolation valve(s) on pump suction
and/or discharge is closed.

Supply chilled water is too high

Liebert XD cooling modules are Off

Low Refrigerant Temperature (high
dew point)

Incorrect location of
temperature-humidity sensors

Pressure switch not making contact

Not enough charge See 3.0 - Checklist for Liebert XDP Startup.

Cavitation due to vapor in pump

Worn motor bearings Replace pump

Low Refrigerant Temperature (High
dew point)

Clogged filter/dryer and/or impeller Clean out debris.

Motor operates but valve won't open

No 24 VAC power to motor Check for 24 VAC between P2-1 and P2-4.

No signal from control Check 24 VAC at P22-1 (close) or P22-3 (open).

Motor not operating

Check control panel for welded
contactor contacts or welded
overload contacts

Shorts or loose connections Check the wiring connections of the 24 VAC circuit.

Faulty circuit board Replace the circuit board.

R-134a pump loop is overcharged

Check and verify that there is supply chilled water to the
Liebert XDP.

Open all isolation valves completely during normal
operation.

Check and verify that the chilled water temperature
setpoint is at 50°F (10°C) or lower and that there is flow
on the chilled water side.

Check Liebert XD cooling module to make sure that they
are On prior to starting the Liebert XDP.

Check alarm(s) history on Liebert XDP. The Liebert XDP
was operating below the dew point for a significant
amount of time. Check humidity in conditioned space,
lower humidity if necessary to allow Liebert XDP to
operate at a lower temperature. (Disconnect must be
switched to Off then back On to allow Liebert XDP to
reset itself).

Place the sensor on the RETURN AIR side of the primary
air mover (e.g., Liebert Deluxe System 3). Do not install
the sensor near unsealed doors, windows and similar
areas.

Check both differential pressure settings. If not within
6 psi, ±1 psi (41kPa, ±7kPa; 0.41 bars, ±0.07bars) then
manually change accordingly.

Check for adequate charge in system, refer to the User's
Manual. 3.0 - Checklist for Liebert XDP Startup

Check humidity of room along with location of remote
sensors. Make sure that the sensors are not located in a
cold area where there is a lack of sufficient air flow.

Check linkage for adjustment and be sure that it is tight on
the valve.

Unplug P22 completely off of the board. Jumper P22-5 to
P2-4 for grounding, then jumper P22-1 to P2-1 to drive
close. Remove jumper to close, and then jumper P22-3 to
P2-1 to drive open. If motor fails to work, replace it.

Replace defective components.

While pump is running R-134a receiver level must be
within recommended levels (see Figure 21).

Troubleshooting

31

7.0 MAINTENANCE

The Liebert XD system components require little maintenance when proper fluid levels are main­tained and proper startup and operation procedures are followed. The following tasks should be per­formed at the intervals stated:

1. Clean or replace chilled water strainer annually. Adjust accordingly based on purity of chilled
water.

2. Check sight glass level of receiver every 4-6 weeks. During normal operation, the level should be
at or above the second sight glass.

3. Check system for leaks every 4-6 weeks.

7.1 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 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.

Maintenance

32

8.0 SPECIFICATIONS

Table 17 Liebert XDP160 specifications

Models XDP160RC--1 XDP160RA--1 XDP160RM--1

Cooling Capacity, Nominal

Minimum Load

Electrical Requirements

Full Load Amps 4A 2.1A 2.3A

Dimensions, inches (mm)

Height – Unit only 78 (1981)

Height – As shipped 83 (2108)

Weight, lb (kg)

Shipping weight Domestic: 990 (449); Export: 1067 (484)

Installed, with refrigerant and

Pipe Connections

Refrigerant supply to Liebert XD

cooling module

Refrigerant return from Liebert XD

cooling module

Chilled water supply and return 2-5/8" OD, Cu

Control Valve

Pressure Drop – Chilled Water
Side

Temperature Rise – Chilled
Water Side at rated flow, °F (°C)

Number of Liebert XD cooling units connected, maximum (minimum)

Liebert XDCF10 16 (4)

Liebert XDH20 8 (2)

Liebert XDH32 5 (1)

Liebert XDV10 16 (4)

Liebert XDO16 10 (2)

Liebert XDO20 8 (2)

Cabinet Exterior Finish Black, matte finish, heat-fused powder coat

Operating Ambient
Temperature, Maximum, °F (°C)

Agency

160kW / 46 Tons, 60Hz 140kW / 40 Tons, 50Hz

Each capacity is based on 45ºF (7ºC) entering water temperature and

140gpm (530lpm) water flow rate. Capacity is reduced when glycol mixtures

are used in place of 100% water.

The Liebert XDP’s minimum recommended operating load is 20% of system
nominal capacity. For example, a Liebert XDP160 60Hz system’s minimum
load would be 32 kW. Loading below this value can unfavorably affect system
operation. Consult factory for any loading below this recommendation.

Input 208V/3ph/60Hz 460V/3/ph60Hz 380/415V/3ph/50Hz

Width 38 (965)

Depth 34 (864)

Unit only 821 (372)

chilled water

2-way, 2" nominal; 35 PSIG close off pressure rating;

150 PSIG maximum allowable pressure

20 psig (137kPa, 1.38bar), with 140 gpm (530lpm) water flow rate,

8.0 (4.4) 6.9 (3.8)

Liebert XDV8 20 (4)

Approvals CSA 60Hz CE 50Hz

1038 (471)

1-1/8" OD, Cu

2-1/8" OD, Cu

control valve fully open

86 (30)

Specifications

33

Ensuring The High Availability
0f Mission-Critical Data And Applications.

Emerson Network Power, the global leader in enabling business-critical
continuity, ensures network resiliency and adaptability through
a family of technologies—including Liebert power and cooling
technologies—that protect and support business-critical systems.
Liebert solutions employ an adaptive architecture that responds
to changes in criticality, density and capacity. 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.

Technical Support / Service

Web Site

www.liebert.com

Monitoring

800-222-5877

[e-mail]

Outside the US: 614-841-6755

Single-Phase UPS

800-222-5877

[e-mail]

Outside the US: 614-841-6755

Three-Phase UPS

800-543-2378

[e-mail]

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

[phone]

Fax: [phone]

Asia

7/F, Dah Sing Financial Centre

108 Gloucester Road, Wanchai

Hong Kong

852 2572220

Fax: [phone]

SL-16641_REV11_06-08

Emerson Network Power.
The global leader in enabling Business-Critical Continuity.

AC Power
Connectivity

DC Power

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.

Embedded Computing
Embedded Power Power Switching & Controls
Monitoring

Outside Plant

Precision Cooling

EmersonNetworkPower.com

Racks & Integrated Cabinets
Services
Surge Protection