Vertiv DSE Thermal Management System User Manual

Liebert®

DSE ThermalManagementSystem

Installer/User Guide

Downflow, 250 kW (71 ton) and 265 kW (75 ton) Capacity, 50and60Hz

The information contained in this document is subject to change without notice
and may not be suitable for all applications. While every precaution has been
taken to ensure the accuracy and completeness of this document, Vertiv
assumes no responsibility and disclaims all liability for damages resulting from
use of this information or for any errors or omissions. Refer to other local
practices or building codes as applicable for the correct methods, tools, and
materials to be used in performing procedures not specifically described in this
document.

The products covered by this instruction manual are manufactured and/or sold
by Vertiv. This document is the property of Vertiv and contains confidential
and proprietary information owned by Vertiv. Any copying, use or disclosure of
it without the written permission of Vertiv is strictly prohibited.

Names of companies and products are trademarks or registered trademarks of
the respective companies. Any questions regarding usage of trademark names
should be directed to the original manufacturer.

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.Vertiv.com/en-us/support/ for additional assistance.

Vertiv | Liebert ® DSE Thermal Management S ystem In staller/User Guide

TABLE OF CONTENTS

1 Important Safety Instructions 1

2 Nomenclature and Components 7

2.1 Liebert® DSE Model Number Nomenclature 7

2.2 Component Location 9

3 Pre-installation PreparationandGuidelines 11

3.1 Planning Dimensions 11

3.2 Connections and System Setup 12

3.3 Operating Conditions 12

3.3.1 Humidification Control 12

3.4 Shipping Dimensions and Unit Weights 12

4 Equipment Inspection and Handling 15

4.1 Packaging Material 15

4.2 Handling the Unit while Packaged 16

4.3 Unpacking the Unit 16

4.4 Removing the Unit from the Skid 17

4.5 Unpacking and Handling the Fan Section 20

5 Electrical Field Connections 21

6 Piping and Refrigerant Requirements 23

6.1 Drain Fluid Piping 24

6.1.1 Field Installed, Gravity Fed Drain Line Requirements 24

6.1.2 Condensate Pump Drain Line Requirements 26

6.2 Refrigerant Piping and Charging 26

6.2.1 Refrigerant Piping Guidelines forAir CooledSystems 27

6.2.2 Piping Layout and Condenser Positioning 28

6.2.3 Refrigerant Line Sizes and Equivalent Lengths 28

6.2.4 Refrigerant Charge Requirements for Air Cooled Systems 29

6.2.5 Additional Oil Requirements forScrollandDigital ScrollCompressors 30

6.2.6 Evacuation, Leak Testing, and Charging Air Cooled Systems 32

7 Checklist for Completed Installation 37

7.1 Moving and Placing Equipment 37

7.2 Electrical Installation Checks 37

7.3 Piping Installation Checks 37

7.4 Other Installation Checks 37

8 Initial Startup Checks andCommissioningProcedure forWarrantyInspection 41

9 Maintenance 43

9.1 Filters 44

9.1.1 Replacing the Filters 44

9.2 Fan Maintenance 45

9.2.1 Fan Assembly Troubleshooting 45

9.2.2 Fan Impellers 46

Vertiv | Liebert® DSE Thermal Management System Installer/User Guide | i

9.2.3 Blower Motor Lubrication 46

9.2.4 Removing Fan Assembly 46

9.3 Condensate Drain and Condensate Pump System Maintenance 46

9.3.1 Condensate Drain 46

9.3.2 Condensate Pump 46

9.4 Electronic Expansion Valve (EEV) Maintenance 47

9.5 Compressor Maintenance 47

9.5.1 Compressor Oil 47

9.5.2 Replacement Compressors 48

9.5.3 Rotalock Valve on Digital Scroll Compressors 48

9.5.4 Unloading Solenoid(s) on a Digital Scroll Compressor 48

9.5.5 Compressor Electrical Failure (Motor Burnout) 49

9.5.6 Replacing a Compressor with Electrical Failure (MotorBurnout) 49

9.5.7 Compressor Mechanical Failure 49

9.5.8 Replacing a Compressor with Mechanical Failure 50

9.6 Evaporator Coil 50

9.7 Air Cooled Condenser Maintenance 51

10 Preventive Maintenance Checklist 53

Appendices 59

Appendix A: Technical Support and Contacts 59

Appendix B: Submittal Drawings 61

Vertiv | Liebert® DSE Thermal Management System Installer/User Guide | ii

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® DSE. 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 installation, operation and maintenance instructions and all applicable national and local building, electrical and
plumbing codes.

WARNING! Arc flash and electric shock hazard. Open all local and remote electric power supply disconnect
switches, verify with a voltmeter that power is Off and wear appropriate, OSHA-approved personal protective
equipment (PPE) per NFPA 70E before working within the 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® controller 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 the controller. The factory supplied disconnect switch is inside the
unit. The line side of this switch 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 electric shock. Can cause equipment damage, injury or death. Open all local and remote
electric power supply disconnect switches and verify with a voltmeter that power is off before working within
any electric connection enclosures. Service and maintenance work must be performed only by properly
trained and qualified personnel and in accordance with applicable regulations and manufacturers’
specifications. Opening or removing the covers to any equipment may expose personnel to lethal voltages
within the unit even when it is apparently not operating and the input wiring is disconnected from the
electrical source.

WARNING! Risk of electric shock. Can cause serious injury or death. Open all local and remote electric power
supply disconnect switches and verify with a voltmeter that power is off before working within the fan motor
electric connection enclosures. Fan motor controls can maintain an electric charge for 10 minutes after power
is disconnected. Wait 10 minutes after power is verified as off before working within the VFD electric
control/connection enclosures. Use only fully trained and qualified HVAC technicians to perform
maintenance on the fans.

WARNING! Risk of electric shock. Can cause injury or death. Open all local and remote electric power supply
disconnect switches and verify that power is Off with a voltmeter before working within the condensate
pump electrical connection enclosure. The Liebert® iCOM™ 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 the
Liebert®iCOM™.

1 Importan t Safety Ins tructions

1

WARNING! Risk of electric shock. Can cause serious injury or death. 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 the Liebert® iCOM™ control. Open all local and remote electric
power disconnect switches and verify with a voltmeter that power is Off before working on any component of
the system.

WARNING! Risk of electric shock. Can cause serious injury or death. Open all local and remote electric power
supply disconnect switches and verify with a voltmeter that power is off before opening the fan motor
electric connection enclosure. Use only fully trained and qualified HVAC technicians to replace or perform
maintenance on the EC fans.

WARNING! Risk of over-pressurization of the refrigeration system. Can cause explosive discharge of high
pressure refrigerant, loss of refrigerant, environmental pollution, equipment damage, injury or death. This
unit contains fluids and gases under high pressure. Use extreme caution when charging the refrigerant
system. Do not pressurize the system higher than the design pressure marked on the unit's nameplate.

WARNING! Risk of very heavy 350 lb. (56.7kg) fan modules dropping downward suddenly. Can cause injury or
death. Support fan modules before removing mounting hardware. Use caution to keep body parts out of the
fan modules pathway during repositioning. Only properly trained and qualified personnel should work on
this equipment.

WARNING! Risk of improper moving. Can cause equipment damage, injury or death. Use only lifting
equipment that is rated for the unit weight by an OSHA-certified rating organization. The center of gravity
varies depending on the unit size and selected options. The slings must be equally spaced on either side of
the center of gravity indicator. Unit weights are listed in Shipping Dimensions and Unit Weights.

WARNING! Risk of contact with high speed rotating fan blades. Can cause serious injury or death. Open all
local and remote electric power supply disconnect switches, verify with a voltmeter that power is off, and
verify that all fan blades have stopped rotating before working in the unit cabinet or on the fan assembly. If
control voltage is applied, the fan motor can restart without warning after a power failure. Do not operate the
unit with any or all cabinet panels removed.

WARNING! Risk of improper wiring, piping, moving, lifting and handling. Can cause equipment damage,
serious injury or death. Installation and service of this equipment should be done only by qualified personnel
who have been specially trained in the installation of air conditioning equipment and who are wearing
appropriate, OSHA-approved PPE.

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Vertiv | Liebert ® DSE Thermal Management S ystem In staller/User Guide

WARNING! Risk of improper wire sizing/rating and loose electrical connections. Can cause overheated wire
and electrical connection terminals resulting in smoke, fire, equipment and building damage, injury or death.
Use correctly sized copper wire only and verify that all electrical connections are tight before turning power
On. Check all electrical connections periodically and tighten as necessary.

WARNING! Risk of top heavy unit falling over. Improper handling can cause equipment damage, injury or
death. Read all of the following instructions and verify that all lifting and moving equipment is rated for the
weight of the unit before attempting to move, lift, remove packaging from or prepare the unit for installation.

WARNING! Risk of wiring damage, short circuits and electric shock. Can cause overheated wiring, smoke, fire,
activation of fire suppression systems and EMS personnel and equipment, building and equipment damage,
injury or death. Insert CSA certified or UL listed bushings into holes and or knockouts used to route wiring
through metal panels to protect the wire insulation from contact with sheet metal edges.

CAUTION: Risk of explosive discharge of high pressure refrigerant. Can cause serious injury. Neutral and
service ports on the rotalock valve do not have a valve core. Front seat the service valves and relieve pressure
from the compressor before loosening a part or a component attached to the service valve. Follow local codes
to properly reclaim refrigerant.

CAUTION: Risk of contact with sharp edges, splinters, and exposed fasteners. Can cause injury. Only
properly trained and qualified personnel wearing appropriate, OSHA-approved PPE should attempt to move,
lift, remove packaging from or prepare the unit for installation.

CAUTION: Risk of contact with hot surfaces. Can cause injury. The compressor, refrigerant discharge lines,
fan motor, and some electrical components are extremely hot during unit operation. Allow sufficient time for
them to cool to a touch safe temperature before working within the unit cabinet. Use extreme caution and
wear appropriate, OSHA-approved PPE when working on or near hot components.

CAUTION: Risk of handling heavy and lengthy parts. Can cause personal injury and equipment damage.
Cabinet panels can exceed 5 ft. (1.5 m) in length and weigh more than 35 lb. (15.9 kg). Follow relevant OSHA
lifting recommendations and consider using a two person lift for safe and comfortable removal and
installation of cabinet panels. Only properly trained and qualified personnel wearing appropriate, OSHA­approved PPE should attempt to remove or install cabinet panels.

CAUTION: Risk of exposure to harmful noise levels. Can cause hearing injury or loss. Depending on the
installation and operating conditions, a sound pressure level greater than 70dB(A) may arise. Take
appropriate technical safety measures. Operating personnel must wear appropriate, OSHA-approved PPE
and observe all appropriate hearing protection safety requirements.

1 Importan t Safety Ins tructions

3

NOTICE

NOTICE

CAUTION: Risk of excessive refrigerant line pressure. Can cause tubing and component rupture resulting in
equipment damage and personal injury. Do not close off the refrigerant-line isolation valve for repairs unless
a pressure relief valve is field installed in the line between the isolation valve and the check valve. The
pressure relief valve must be rated 5% to 10% higher than the system design pressure. An increase in
ambient temperature can cause the pressure of the isolated refrigerant to rise and exceed the system design
pressure rating (marked on the unit nameplate).

Risk of improper power supply connection. Can cause equipment damage and loss of warranty coverage.

Prior to connecting any equipment to a main or alternate power source (for example: backup generator
systems) for startup, commissioning, testing, or normal operation, ensure that these sources are correctly
adjusted to the nameplate voltage and frequency of all equipment to be connected. In general, power source
voltages should be stabilized and regulated to within ±10% of the load nameplate nominal voltage. Also, ensure
that no three phase sources are single phased at any time.

Risk of oil contamination with water. Can cause equipment damage.

Liebert®DSE systems require the use of POE (polyolester) oil. POE oil absorbs water at a much faster rate
when exposed to air than previously used oils. Because water is the enemy of a reliable refrigeration system,
extreme care must be used when opening systems during installation or service. If water is absorbed into the
POE oil, it will not be easily removed and will not be removed through the normal evacuation process. If the oil
is too wet, it may require an oil change. POE oils also have a property that makes them act as a solvent in a
refrigeration system. Maintaining system cleanliness is extremely important because the oil will tend to bring
any foreign matter back to the compressor.

NOTICE

Risk of improper refrigerant charging. Can cause equipment damage.

Refrigerant charge must be weighed into air cooled compressorized systems before they are started. Starting
digital scroll compressors without proper refrigerant charging can cause the compressors to operate at less
than 5°F (–15°C) evaporator temperature and at less than 52psig(358kPa). Operation for extended periods at
less than 52psig(358kPa) can cause premature compressor failure.

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Vertiv | Liebert ® DSE Thermal Management S ystem In staller/User Guide

NOTICE

NOTICE

NOTICE

Risk of clogged or leaking drain lines and leaking water supply lines. Can cause equipment and building
damage.

This unit requires a water drain connection. Drain lines must be inspected at startup and periodically, 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 catastrophic and expensive building and equipment damage and loss of critical data
center equipment.

Do not locate unit directly above any equipment that could sustain water damage.

We recommend installing a monitored fluid detection system to immediately discover and report coolant-fluid
system and condensate drain line leaks.

Do not install an external trap in the drain line. This line already has a factory installed trap inside the cabinet.
Installation of a second trap will prevent drain water flow and will cause the water to overflow the drain pan.
Sagging condensate drain lines may inadvertently cause an external trap.

Risk of doorway/hallway interference. Can cause unit and/or structure damage. The unit may be too large to fit
through a doorway or hallway while on the skid. Measure the unit and passageway dimensions, and refer to the
installation plans prior to moving the unit to verify clearances.

NOTICE

Risk of damage from forklift. Can cause unit damage. Keep tines of the forklift level and at a height suitable to
fit below the skid and/or unit to prevent exterior and/or underside damage.

NOTICE

Risk of improper storage. Can cause unit damage.

Keep the unit upright, indoors and protected from dampness, freezing temperatures and contact damage.

NOTE: The Liebert® indoor cooling unit has a factory installed, high pressure safety switch in the high side
refrigerant circuit. Each refrigerant receiver contains a fusible plug for fire safety purposes. Consult your local
building code to determine whether the refrigerant piping will require additional, field provided pressure relief
devices.

1 Importan t Safety Ins tructions

5

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Vertiv | Liebert ® DSE Thermal Management S ystem In staller/User Guide

2 NOMENCLATURE AND COMPONENTS

This section describes the model number for Liebert® DSE units and components.

2.1 Liebert® DSE Model Number Nomenclature

Table 2.2 below describes each digit of the model number.

Table 2.1 DSE Model Number

ModelNumber Digits 1 to 10 ModelDetails ModelNumber Digits 1 1 t o 14

1 2 3 4 5 6 7 8 9 10 11 12 1 3 14 15 1 6 17 18 1 9 20 21 22 23 24 25

D A 2 5 0 D P 3 A T 0 2 0 8 1 1 L 0 B 0 P 1 2 3 S

Table 2.2 DSE Model Number Digit Definitions

Digit Description

Digits 1 and 2 = Product Family

DA = Liebert®DSE

Digit3, 4, 5 = Nominal Cooling Capacity, kW

250 = 250 kW

265 = 265 kW

Digit6 = Air Discharge

D = Downflow, bottom discharge

H = Downflow, horizontal discharge

Digit7 = System Type

P = Air cooled, Econ-O-Phase ready

Digit8 = Airflow (Fan Type)

3 = Direct-drive + VFD (plenum)

Digit9 = Voltage

A = 460V - 3ph - 60Hz

B = 575V - 3ph - 60Hz

G = 415 V - 3ph - 50Hz

*For applications that require less than 400V/3ph/50Hz, please consult your loca l sales office for assistance.

Digit10 = Cooling System

T = Tandem with digital scroll, R-410A

P = Ta ndem with digital scroll, R-410A with Power Factor Correction

Digit11 = Humidifier

0 = N o humidifier

Digit12 = Display

2 = Liebert® iCOM™ (High Definition)

2 Nomenclature and Components

7

Table 2.2 DSE Model Number Digit Definitions (continued)

Digit Description

Digit13 = Reheat

0 = N one

Digit14 = Air Filter

8 = MERV 8, 4 in .

9 = MERV 11, 4 in .

Digit15 = Coil Option

1 = Non-coated coil, indoor unit

2 = Coated coil, indoor unit

Digit16 = Enclosure Option

1 = Color standard

2 = Color optional

Digit17 = High voltage option

L = Locking disconnect

5 = Locking disconnect, with condensate pump

S = Dual locking disconnect with reversing starter and condenser subfeed

9 = Dual locking disconnect with reversing starter with condensate pump and condenser subfeed

Digit18 = Option packages

0 = N one

L = Option package #1 - low voltage terminal package contact

D = Low Voltage Terminal Package and Remote Humidifier Contact

Digit19 = Monitoring

B = Base comms and connectivity

Digit20 = Sensors

0 = N one

H = High Temperature Sensor

S = Smoke Sensor

F = Smoke Sensor and High Temperature Sensor

Digit21 = Pa ckaging

P = Domestic

C = Export

Digit22-24 = Factory Configuration Number

Digit25 = Configuration Code

A = No SFAs (Any alpha letter except S)

S = Special fea ture authorization (SFA). A non-standard configuration or feature of the product that requires the local factory
representative to work directly with the fa ctory.

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Vertiv | Liebert ® DSE Thermal Management S ystem In staller/User Guide

2.2 Component Location

The unit component locations are described in the submittal documents included in the Submittal Drawings.

The following table lists the relevant documents by number and title.

Table 2.3 Component Location Drawings

Docu ment Num ber Title

DPN004368 Liebert®DSECabinet Dimension Data DA250, DA265 with Horizontal Discharge

2 Nomenclature and Components

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Vertiv | Liebert ® DSE Thermal Management S ystem In staller/User Guide

3 PRE-INSTALLATION PREPARATIONANDGUIDELINES

NOTE: Before installing unit, determine whether any building alterations are required to run piping, wiring and duct
work. Follow all unit dimensional drawings and refer to the submittal engineering dimensional drawings of individual
units for proper clearances.

Refer to DSE Model Number Digit Definitions, and submittal drawings to determine the type of system being installed and
anticipate building alterations, piping and duct work needed.

The unit dimensions, pipe connection locations, and piping schematics are described in the submittal documents included
in the Submittal Drawings.

• Verify that the floor is level, solid and sufficient to support the unit. See Shipping Dimensions and Unit Weights
on the next page for unit weights.

• Confirm that the room is properly insulated and has a sealed vapor barrier.

• For proper humidity control, keep outside or fresh air to an absolute minimum (less than 5% of total air
circulated in the room).

• Do not install a Liebert® DSE in an alcove or at the end of a long, narrow room.

• Install the units as close as possible to the largest heat load.

• Allow at least the minimum recommended clearances for maintenance and service. See the appropriate
submittal drawings for dimensions.

We recommend installing an under floor water detection system. Contact your Vertiv representative for information.

3.1 Planning Dimensions

The unit, floor stand, and plenum dimensions are described in the submittal documents included in the Submittal Drawings.

The following table lists the relevant documents by number and title.

Table 3.1 Dimension Planning Drawings

Docu ment Num ber Title

Downflow Units

DPN004366 Liebert®DSE Cabinet Dimensional Data DA250, DA265 with Horizontal Discharge

DPN004516 Liebert® DSE Cabinet Dimensional Data DA250, DA265 with Bottom Discharge

DPN004514 Liebert® DSE Installation and Service Clearance Data DA250, DA265

DPN004581 Liebert® DSE Floor Planning for Adjacent DA250, DA265 Units

Floor Stands

DPN004511 Liebert®DSE Floor Stand Dimensional Data DA250, DA265

3 Pr e-installation PreparationandG uidelin es

11

3.2 Connections and System Setup

• The unit requires a drain, which must comply with all applicable codes. See Connections and System Setup
above, for details.

• If seismic requirements apply, consult your Vertiv representative for information about a seismic rated floor
stand.

NOTE: Seal openings around electrical connection to prevent air leakage. Failure to do so could reduce the unit’s
cooling performance.

The Liebert® DSE controls superheat with an electronic expansion valve (EEV). The EEV controller adjusts the orifice based
on suction pressure and temperature. The EEV control will drive the valve to maintain the superheat setpoint, set in the
Liebert® iCOM™, using a Proportional, Integral, Derivative (PID) routine. The PID control values are set at the factory for
most applications. These default values PID will allow stable superheat control of the unit.

3.3 Operating Conditions

The Liebert® DSE must be operated in a conditioned space within the operating envelope that ASHRAE recommends for
data centers. Operating the DSE outside of this envelope can decrease equipment reliability. Refer to ASHRAE’s
publication, “Thermal Guidelines for Data Processing Environments.”

The recommended maximum for return air temperature is 105°F (40°C) and maximum dew point is 59°F (15°C). The
recommended minimum return air temperature setpoint for the DSE is 85°F(29.4°C).

3.3.1 Humidification Control

The humidifier option is not available on the DA250 or DA265. A remote humidifier contact is available for a standalone
humidifier.

3.4 Shipping Dimensions and Unit Weights

Table 3.2 Downflow Unit Domestic and Export Shipping Dimensions and Weights

Model #

DA250, DA265

Fan section

Ship Weight, lb(kg) Shippin g Dim ensions, in.(mm ) Ship Weight, lb(kg) Shipping Dimensio ns, in.(mm)

6,160

(2,794)

3,281

(1,488)

Dom estic Packaging Export Packaging

90 x 128 x 97

(2,286 x 3, 251 x 2,464)

90 x 128 x 54

(2,286 x 3, 251 x 1,37 2)

6,540 (2,966)

3,676 (1,667)

90.5 x 1,28.5 x 99

(2,299 x 3,264 x 2,515)

90.5 x 1,28.5 x 99

(2,299 x 3,264 x 2,515)

Dry Weight, lb(kg)

4,761

(2,159)

2325

(1,055)

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Vertiv | Liebert ® DSE Thermal Management S ystem In staller/User Guide

Table 3.3 Liebert® MCV Condenser Unit Domestic and Export Shipping Dimensions and Weights

Dom estic Packaging Export Packaging

Model #

Ship Weight, lb

(kg)

Shippin g

dimension s, ft

(mm)

Ship Weight, lb

(kg)

Shippin g

dimension s, ft

(mm)

Dry Weight, lb

(kg)

Max. Operation

Weight, lb(kg)

1

MCV440
(singleskid)
8-fan+PR250

2

MCV440
(dual skid)
16-fan+PR250
(qty.2)

1

Deduct 120 lbs. (55kg) if no receivers

2

Deduct 220 lbs. (100kg) if no receivers.

5,900

(2,676)

11,580

(5,252)

8ft 6 in. x 14 ft 6

in. x 9ft6in.

(2,591 x 4,420 x

2,896)

8ft 6 in. x 29ft x

9ft6in.

(2,591 x 8,839 x

2,896)

6,200

(2,812)

11,580

(5,252)

9ft 5 in. x 14ft
9in. x 9ft6in.

(2,870 x 4,496 x

28,96)

9ft 5 in. x 29ft
4in. x 9ft6in.

(2,870 x 8,941 x

2,896)

5,800

(2,667)

11,560

(5,243)

5,940

(2,694)

11,880

(5,388)

3 Pr e-installation PreparationandG uidelin es

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Vertiv | Liebert ® DSE Thermal Management S ystem In staller/User Guide

4 EQUIPMENT INSPECTION AND HANDLING

WARNING! Risk of top heavy unit falling over. Improper handling can cause equipment damage, injury or
death. Read all of the following instructions and verify that all lifting and moving equipment is rated for the
weight of the unit before attempting to move, lift, remove packaging from or prepare the unit for installation.

CAUTION: Risk of contact with sharp edges, splinters, and exposed fasteners. Can cause injury. Only
properly trained and qualified personnel wearing appropriate, OSHA-approved PPE should attempt to move,
lift, remove packaging from or prepare the unit for installation.

NOTICE

Risk of passageway interference. Can cause unit and/or structure damage. The unit may be too large to fit
through a passageway while on or off the skid. Measure the unit and passageway dimensions, and refer to the
installation plans prior to moving the unit to verify clearances.

NOTICE

Risk of damage from forklift. Can cause unit damage. Keep tines of the forklift level and at a height suitable to
fit below the skid and/or unit to prevent exterior and/or underside damage.

NOTICE

Risk of improper storage. Keep the unit upright, indoors and protected from dampness, freezing temperatures
and contact damage.

Upon arrival of the unit and before unpacking:

• Verify that the labeled equipment matches the bill of lading.

• Carefully inspect all items for visible or concealed damage.

• Report damage immediately to the carrier and file a damage claim with a copy sent to Vertiv or to your sales
representative.

Equipment Recommended for Handling the Unit:

• Forklift

• Slings

• Spreader bars

• Beam trolleys

• Chain hoists

• Gantries

4.1 Packaging Material

All material used to package this unit is recyclable. Please save for future use or dispose of the material appropriately.

4 Equipment Inspection and Hand lin g

15

4.2 Handling the Unit while Packaged

If possible, transport the unit with a forklift

When using a forklift:

• Make sure that the lift has adjustable forks, and are spread to the widest allowable distance to still fit under the
skid.

• Make sure that the fork length is suitable for the skid length. Skid length is 128in. (3251mm).

• If the unit must be lifted higher than 2in.(51mm) to 4in. (102 mm), all personnel not directly involved in
moving the unit must be 20ft. (5m) or farther from the unit.

4.3 Unpacking the Unit

Remove exterior package material from around, and on top of the unit.

Figure 4.1 Unpacking the Unit

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Vertiv | Liebert ® DSE Thermal Management S ystem In staller/User Guide

4.4 Removing the Unit from the Skid

NOTE: If you do not follow these steps, damage could occur to the panels and base of the unit.

1. Referring to Figure 4.2 below, use a 9/16 in. socket driver to remove the lag screws (24 total) from the four
corner brackets to detach the unit from the skid.

Figure 4.2 Remove Corner Brackets

4 Equipment Inspection and Hand lin g

17

2. Open the door indicated in Figure 4.3 below, and locate the rigging fastener kit that is secured to the bottom
base inside the door.

3. Using the instructions included in the kit, install the rigging hardware for lifting the unit from the skid. Figure 4.3

below, shows an example of one of the eye nuts installed.

Figure 4.3 Locate the Rigging Fastener Hardware Kit

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4. Attach the recommended rigging equipment to the eye nuts installed in Step 3.

5. Using the rigging equipment, lift the unit from the skid, and remove the skid from under the unit, see Figure 4.4

below.

Figure 4.4 Lifting Unit and Removing Skid

4 Equipment Inspection and Hand lin g

19

6. Use the rigging equipment to move the unit to the final installation location, see Figure 4.5 below.

Figure 4.5 Moving the Unit with Rigging

4.5 Unpacking and Handling the Fan Section

Refer to drawing number 336511 "Instructions Handling/Installation of Fan Section CW/DSE" that is included in the fan
plenum packaging for instructions on uncrating and handling the fan section.

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5 ELECTRICAL FIELD CONNECTIONS

WARNING! Arc flash and electric shock hazard. Open all local and remote electric power supply disconnect
switches, verify with a voltmeter that power is Off and wear appropriate, OSHA-approved personal protective
equipment (PPE) per NFPA 70E before working within the 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® controller 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 the controller. The factory supplied disconnect switch is inside the
unit. The line side of this switch 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 electric shock. Can cause equipment damage, injury or death. Open all local and remote
electric power supply disconnect switches and verify with a voltmeter that power is off before working within
any electric connection enclosures. Service and maintenance work must be performed only by properly
trained and qualified personnel and in accordance with applicable regulations and manufacturers’
specifications. Opening or removing the covers to any equipment may expose personnel to lethal voltages
within the unit even when it is apparently not operating and the input wiring is disconnected from the
electrical source.

NOTICE

WARNING! Risk of improper wire sizing/rating and loose electrical connections. Can cause overheated wire
and electrical connection terminals resulting in smoke, fire, equipment and building damage, injury or death.
Use correctly sized copper wire only and verify that all electrical connections are tight before turning power
On. Check all electrical connections periodically and tighten as necessary.

WARNING! Risk of wiring damage, short circuits and electric shock. Can cause overheated wiring, smoke, fire,
activation of fire suppression systems and EMS personnel and equipment, building and equipment damage,
injury or death. Insert CSA certified or UL listed bushings into holes and or knockouts used to route wiring
through metal panels to protect the wire insulation from contact with sheet metal edges.

Risk of improper electrical connection of three phase input power. Can cause backward compressor rotation
and unit damage. Service technicians should use a gauge set on the system during the initial startup to verify
that the three phase power is connected properly. Three phase power must be connected to the unit line
voltage terminals in the proper sequence so that the compressors rotate in the proper direction. Incoming
power must be properly phased to prevent compressors from running backward. We recommend checking the
unit’s phasing with proper instrumentation to ensure that power connections were made correctly. We also
recommend verifying discharge and suction pressures during startup to ensure that the compressors are
running in the correct direction.

5 Electrical Field Connections

21

NOTICE

Risk of improper power supply connection. Can cause equipment damage and loss of warranty coverage.

Prior to connecting any equipment to a main or alternate power source (for example: backup generator
systems) for startup, commissioning, testing, or normal operation, ensure that these sources are correctly
adjusted to the nameplate voltage and frequency of all equipment to be connected. In general, power source
voltages should be stabilized and regulated to within ±10% of the load nameplate nominal voltage. Also, ensure
that no three phase sources are single phased at any time.

See transformer label for primary tap connections. Installer will need to change transformer primary taps if
applied unit voltage is other than pre-wired tap voltage.

NOTE: Seal openings around piping and electrical connection to prevent air leakage. Failure to do so could reduce the
unit’s cooling performance.

Three phase electrical service is required for all models. Electrical service must conform to national and local electrical
codes. Refer to equipment nameplate regarding wire size and circuit protection requirements. Refer the appropriate
submittal drawing, listed in Table 5.1 below, for electrical service entrances into unit

• Liebert® DSE voltage should be verified with available power supply before installation. Refer to the unit’s
electrical schematic and serial tag for specific electrical requirements. Line voltage electrical service is also
required for all condensers at the location of the condenser.

• For the most reliable operation of the system, the indoor unit and the Liebert® MCV condenser should be on the
same power source. The Liebert® DSE system offers an option for a power feed from the active source on the
indoor unit to the outdoor condenser. This configuration provides the greatest reliability and fastest recovery
during power loss or source change.

• When powering the outdoor condenser from the indoor unit, there is a breaker/fuse on the indoor unit.

• A unit disconnect is standard on the Liebert® MCV skid. However, a site disconnect may be required per local
code to isolate the unit for maintenance. Refer to the unit’s serial tag for specific condenser electrical
requirements.

• Route the supply power to the site disconnect switch and then to a factory provided high voltage enclosure
located on the MCV heat rejection skid.

• A manual electrical disconnect switch should be installed in accordance with local codes and distribution
system. Consult local codes for external disconnect requirements.

The electrical and unit to unit connections are described in the submittal documents included in the Submittal Drawings.

The following table lists the relevant documents by number and title.

Table 5.1 Electrical Field Connection Drawings

Docu ment Num ber Title

DPN004797 Liebert®DSE Electrical Field Connections DA250, DA265 Downflow Models

DPN003886

Unit to Unit Networking

DPN004351

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Liebert®Heat Rejection Skid CANbus and Interlock Connections Liebert®MCV and Liebert®MCV
EconoPhase and Base Assembly

Liebert®iCOM™ Unit to Unit Network Connections (Liebert® CW, Liebert® CWA, Liebert® DS, Liebert® DSE,
Liebert®P DX, Liebert® PCW

Vertiv | Liebert ® DSE Thermal Management S ystem In staller/User Guide

6 PIPING AND REFRIGERANT REQUIREMENTS

All fluid and refrigeration connections to the unit are sweat copper. Factory installed piping brackets must not be removed.
Field installed piping must be installed in accordance with local codes and must be properly assembled, supported,
isolated and insulated. Avoid piping runs through noise sensitive areas, such as office walls and conference rooms.

Refer to specific text and detailed diagrams in this manual for other unit specific piping requirements.

All piping below the elevated floor must be located so that it offers the least resistance to air flow. Careful planning of the
piping layout under the raised floor is required to prevent the air flow from being blocked. When installing piping on the
subfloor, we recommend that the pipes be mounted in a horizontal plane rather than stacked one above the other. Whenever
possible, the pipes should be run parallel to the air flow.

The following pipe connections are required:

• A drain line from the unit.

• A drain line from the secondary drain pan (if applicable).

• Refrigerant piping connections between the evaporator unit and the MCV440 heat rejection skid. See

Refrigerant Piping and Charging on page26.

The pipe connection locations, piping general arrangement and schematics are described in the submittal documents
included in the Submittal Drawings.

The following tables list the relevant documents by number and title.

Table 6.1 Piping General Arrangment Drawings

Docu ment Num ber Title

DPN004476 Piping Schematic, DA125, DA150, DA165 & DA250 with Liebert®MCV

DPN005206 Piping Schem atic, DA265 with Liebert®MCV

Piping Arrangement - Liebert®MCVCondenser and EconoPhase Pump Locations

DPN003965 Liebert® DSEAir Cooled Piping Schematic Liebert®MCV Mounted above Liebert®DA125-250

DPN005207 Liebert® DSE Air Cooled P iping Schematic Liebert® MCV Mounted above DA265

Table 6.2 Piping Connection Drawings

Docu ment Num ber Title

DPN004208 Liebert®DSE Connection Locations, DA250, DA265

6 Pip ing and Refrigerant Requirements

23

6.1 Drain Fluid Piping

NOTICE

Risk of water leakage. Can cause severe property damage and loss of critical data center equipment.

The Liebert®DSE requires a water drain connection. Improper installation, application and service practices
can result in water leakage from the unit.

Do not locate the unit directly above any equipment that could sustain water damage.

We recommend installing monitored leak detection equipment for the water supply lines and the internal unit
water lines.

6.1.1 Field Installed, Gravity Fed Drain Line Requirements

NOTICE

Risk of water backing up in the drain line. Leaking and overflowing water can cause equipment and building
damage.

Do not install an external trap in the drain line. This line already has a factory installed trap inside the cabinet.
Installation of a second trap will prevent drain water flow and will cause the water to overflow the drain pan.

Sagging condensate drain lines may inadvertently create an external trap.

Observe the following requirements when installing and routing the drain line:

• The drain line must be sized for 2 gpm (7.6 l/m) flow.

• The drain line must be located so it will not be exposed to freezing temperatures.

• The drain should be the full size of the drain connection.

• The drain line must slope continuously away from the unit. Pitch drain line toward drain a minimum of 1/8in.
(3mm) per 1ft (305mm) of length.

• Drain is trapped internally. Do not externally trap the drain line.

• The drain line must be rigid enough that it does not sag between supports, which unintentionally creates traps.

• The drain line must comply with all applicable codes.

• We recommend installing monitored, under floor leak detection equipment.

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