Vertiv DSE User Manual

Liebert®

DSE™ ThermalManagementSystem

Installer/User Guide

Downflow 50to 165kW (14to47ton) Capacity; Upflow80to85kW(23to24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® D SE™ Installer/U ser Guide

TABLE OF CONTENTS

Important Safety Instructions 1

1 Nomenclature and Components 9

1.1 Liebert DSE Model-number Nomenclature 9

1.2 Component Location 11

2 Pre-installation PreparationandGuidelines 13

2.1 Planning Dimensions 14

2.2 Air-distribution Considerations for Downflow Units 14

2.3 Air-distribution Considerations for Upflow Units 16

2.4 Connections and System Setup 16

2.5 Operating Conditions 17

2.5.1 Cooling, Dehumidification and Humidification 17

2.5.2 Heating 19

2.5.3 Humidification Control 19

2.6 Shipping Dimensions and Unit Weights 19

3 Equipment Inspection and Handling 21

3.1 Packaging Material 22

3.2 Handling the Unit while Packaged 22

3.3 Unpacking the Unit 23

3.3.1 Removing the Unit from the Skid with a Forklift 23

3.3.2 Removing the Unit from theSkid Using Rigging 24

3.3.3 Moving the Unit to the Installation Location Using Piano Jacks 26

3.4 Placing the Unit on a Floor Stand 28

4 Piping and Refrigerant Requirements 29

4.1 Drain and Humidifier Fluid Piping 30

4.1.1 Field-installed, Gravity-fed Drain Line Requirements 31

4.1.2 Condensate-pump Drain Line Requirements 33

4.1.3 Water Supply-line Requirements for the Optional Humidifier 33

4.2 Refrigerant Piping and Charging 34

4.2.1 Refrigerant Piping Guidelines forAir-cooledSystems 35

4.2.2 Refrigerant Line Sizes and Equivalent Lengths 36

4.2.3 Refrigerant Charge Requirements for Air-cooled Systems 36

4.2.4 Additional Oil Requirements forScrollandDigital-scrollCompressors 38

4.2.5 Evacuation, Leak-testing, and Charging Air-cooled Systems withReceivers 40

5 Electrical Connections 43

6 EC Fans and Plenums 45

6.1 Downflow Units with EC Fans 45

6.1.1 Lowering the EC Fans into the Floor Stand on Downflow Models 45

6.2 Downflow Unit Filter Plenums 48

i

6.3 Upflow-unit Plenums with EC Fans 51

6.3.1 Assembly Inspection 52

6.3.2 Assemble plenum rear and side panels 57

6.3.3 Wire the EC Fans 60

6.3.4 Install front panels on plenum 63

6.3.5 Assemble and Install compressor-section plenum 73

7 Checklist for Completed Installation 77

7.1 Moving and Placing Equipment 77

7.2 Electrical Installation Checks 77

7.3 Piping Installation Checks 77

7.4 Other Installation Checks 77

8 Initial Start-up Checks andCommissioningProcedure forWarrantyInspection 79

9 Maintenance 81

9.1 Filters 82

9.1.1 Filter-replacement for Downflow Units 82

9.1.2 Filter-replacement for Upflow Units 83

9.2 Blower Drive System—EC Fans 85

9.2.1 Protective Features 85

9.2.2 Fan Impellers and Bearings Maintenance 86

9.2.3 Fan Assembly Troubleshooting 86

9.2.4 Removing EC Fans from Downflow Units 90

9.2.5 Removing EC Fans from Upflow Units 94

9.3 Infrared Humidifier Maintenance 98

9.3.1 Cleaning Humidifier Pan and Float Switch 98

9.3.2 Changing Humidifier Lamps 99

9.4 Condensate-drain and Condensate-pump System Maintenance 100

9.4.1 Condensate Drain 100

9.4.2 Condensate Pump 100

9.5 Electric Reheat Maintenance 100

9.6 Electronic Expansion Valve (EEV) Maintenance 101

9.7 Compressor Maintenance 102

9.7.1 Compressor Oil 102

9.7.2 Replacement Compressors 102

9.7.3 Rotalock Valve on Digital-Scroll Compressors 103

9.7.4 Unloading Solenoid(s) on a Digital-scroll Compressor 103

9.7.5 Compressor Electrical Failure (Motor Burnout) 104

9.7.6 Replacing a Compressor with Electrical Failure (MotorBurnout) 104

9.7.7 Compressor Mechanical Failure 105

9.7.8 Replacing a Compressor with Mechanical Failure 105

9.8 Evaporator Coil Performance 105

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Vertiv | Liebert® D SE™ Installer/U ser Guide

9.9 Air-Cooled Condenser Maintenance 106

10 Preventive Maintenance Checklist 107

Appendices 113

Appendix A: Technical Support and Contacts 113

Appendix B: Disassembling the DSE for Transport 115

Appendix C: Submittal Drawings 127

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Vertiv | Liebert® D SE™ Installer/U ser Guide

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. 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.

Importan t Safety Ins tructions

1

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 fan 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.

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 over-pressurization of the refrigeration system. Can cause explosive discharge of high­pressure 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. For
systems requiring EU CE compliance (50Hz), the system installer must provide and install a pressure relief
valve in the high side refrigerant circuit that is rated same as the refrigerant high side “Max Allowable
Pressure” rating that is marked on the unit serial tag. Do not install a shutoff valve between the compressor
and the field installed relief valve. The pressure relief valve must be CE-certified to the EU Pressure
Equipment Directive by an EU “Notified Body.”

WARNING! Risk of very heavy 125-lb (56.7-kg) 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.
Shipping weights and unit weights are listed in the tables in Shipping Dimensions and Unit Weights on
page19.

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Vertiv | Liebert® D SE™ Installer/U ser Guide

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 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.
Unit weights are specified in Shipping Dimensions and Unit Weights on page19.

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.

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.

WARNING! 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 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).

Importan t Safety Ins tructions

3

CAUTION: Risk of improper moving, lifting and handling. Can cause equipment damage or injury. Only
properly trained and qualified personnel should work on this equipment. Evaporator fan modules weigh in
excess of 125-lb (56.7-kg). Use proper lifting techniques and wear appropriate, OSHA-approved PPE to avoid
injury and dropping the fan module during removal. Equipment used in handling/lifting, and/or installing the
fan assembly must meet OSHA requirements. Use handling/lifting equipment rated for the weight of the fan
assembly. Use ladders rated for the weight of the fan assembly and technicians if used during installation.
Refer to handling/lifting, and/or installation equipment operating manual for manufacturer's safety
requirements and operating procedures.

CAUTION: Risk of improper moving, lifting and handling. Can cause equipment damage or injury. Only
properly trained and qualified personnel should work on this equipment. Condenser fan modules weigh in
excess of 125-lb (56.7-kg). Use proper lifting techniques and wear appropriate, OSHA-approved PPE to avoid
injury and dropping the fan module during removal. Equipment used in handling/lifting, and/or installing the
fan assembly must meet OSHA requirements. Use handling/lifting equipment rated for the weight of the fan
assembly. Use ladders rated for the weight of the fan assembly and technicians if used during installation.
Refer to handling/lifting, and/or installation equipment operating manual for manufacturer's safety
requirements and operating procedures.

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 electronics housing, humidifier
components, 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 contact with extremely hot water and part surfaces. Can cause burn injury. The infrared
humidifier bulbs, metal enclosure, humidifier water, water reservoir pan and drain tubing are very hot
during and shortly after operation. Allow sufficient time for these parts to cool to a touch-safe temperature
before handling. Use extreme caution, and wear appropriate, OSHA-approved PPE when performing
maintenance on the infrared humidifier.

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.

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Vertiv | Liebert® D SE™ Installer/U ser Guide

NOTICE

CAUTION: Risk of smoke generation. Can cause fire suppression and alarm system activation, resulting in
injury during building evacuation and mobilization of emergency fire and rescue services. Start-up operation
of optional electric reheat elements can create smoke or fumes that can activate the facility alarm and fire
suppression system. Prepare and take appropriate steps to manage this possibility. Activating reheat during
initial start-up may burn off particulates from electric reheat elements. Before beginning initial start-up
checks, make certain that unit was installed according to the instructions in this manual. All exterior panels
must be in place.

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.

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: back-up generator
systems) for start-up, 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.

NOTICE

NOTICE

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.

Risk of improper refrigerant charging. Can cause equipment damage.

Refrigerant charge must be weighed into air-cooled compressorized systems before they are started. Starting
scroll and 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.

Importan t Safety Ins tructions

5

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 start-up 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.

Risk of improper water supply. Can reduce humidifier efficiency or obstruct humidifier plumbing.

Do not use a hot water source. It will cause deposits that will eventually block the fill-valve opening.

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.

NOTICE

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.

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Vertiv | Liebert® D SE™ Installer/U ser Guide

NOTICE TO EUROPEAN UNION CUSTOMERS: DISPOSAL OF OLD APPLIANCES—This product uses components that are
dangerous for the environment, such as electronic cards and other electronic components. Any component that is removed
must be take to specialized collection and disposal centers. If this unit must be dismantled, this must be done by a
specialized center for collection and disposal of electric and electrical appliances or other dangerous substances.

This product has been supplied from an environmentally aware manufacturer that complies with the Waste Electrical and
Electronic Equipment (WEEE) Directive 2012/19/CE.

The “crossed-out wheelie bin” symbol is placed on this product to encourage you to recycle wherever possible. Please be
environmentally responsible and recycle this product through your recycling facility at its end of life. Do not dispose of this
product as unsorted municipal waste. Follow local municipal waste ordinances for proper disposal provisions to reduce the
environmental impact of waste electrical and electronic equipment (WEEE).

For information regarding the scrapping of this equipment, please browse www.Vertiv.com or call our
worldwide technical support.

• Toll Free: 00 80011554499

• Toll Number Based in Italy: [phone]

Importan t Safety Ins tructions

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Vertiv | Liebert® D SE™ Installer/U ser Guide

1 NOMENCLATURE AND COMPONENTS

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

1.1 Liebert DSE Model-number Nomenclature

Table 1.2 below describes each digit of the model number.

Table 1.1 DSE Model Number Example

ModelNumber Digits 1 to 10 ModelDetails ModelNumber Digits 11 to 14

1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 5 16 17 1 8 1 9 20 2 1 22 23 24 25

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

Table 1.2 DSE Model-number Digit Definitions

Digit Description

Digits 1 and 2 = Product Family

DA = Liebert® DSE

Digit3, 4, 5 = Nominal CoolingCapacity, kW

050 = 50 kW

080 = 80 kW

085 = 85 kW

125 = 125 kW

150 = 150 kW

165 = 165kW

Digit6 = Air Discharge

Digit7 = System Type

Digit8 = Air-flow (Fan Type)

Digit9 = Voltage

1 Nomenclature and Componen ts

D = Downflow

U = Upflow

A = Air-cooled

P = Air-cooled, Econ-O-Phase ready

1 = EC plug fans

A = 460V -3ph -60Hz

B = 575V - 3ph -60Hz

C = 208V -3ph - 60Hz

D = 230V -3ph - 60Hz

2 = 380 V -3ph - 60Hz

M = 380-415 V -3ph - 50Hz

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Table 1.2 DSE Model-number Digit Definitions (continued)

Digit Description

Digit10 = Cooling System

D = Digital scroll, R-410A

T = Tandem withdigital scroll, R-410A

Digit11 = Humidifier

0 = No humidifier

H = Infrared Humidifier

Digit12 = Display

2 = iCOM (High Definition)

Digit13 = Rehea t

0 = None

1 = Electric reheat, standard capacity

R = Electric reheat, reduced capacity

Digit14 = Air Filter

8 = MERV 8, 4-in.

9 = MERV 11 , 4-in.

A = MERV 13, 4-in.

6 = MERV 11 , 2-in. plus MERV 8 pre-filter, 2-in.

C = MERV 13, 2-in. plus MERV 8 pre-filter, 2-in.

Digit15 = Coil Option

1 = Non-coated coil, indoor unit

Digit16 = Enclosure Option

1 = Color standard

2 = Color optional

3 = Color standard and IBC/OSHPD bracing

4 = Coloroptional and IBC/OSHPD bracing

Digit17 = High-voltage option

L = Locking disconnect

5 = Locking disconnect, with condensate pump

Digit18 = Option packages

0 = None

L = Optionpackage #1 - low-voltage terminal package

H = Reheat and Humidifier lockout

R = Remote humidity contact

D = Optionpackage #1 plus remote humidifier lockout

E = Optionpackage #1 plus reheat/humidifier lockout plus remote contact

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Vertiv | Liebert® D SE™ Installer/U ser Guide

Table 1.2 DSE Model-number Digit Definitions (continued)

Digit Description

Digit19 = Monitoring

B = Base comms and connectivity

Digit20 = Sensors

0 = None

S = Smoke sensor

H = High-temperature sensor

F = Smoke and High-temperature sensors

C = Compressor-overload sensors

D = Compressor, smoke sensors

K = Compressor, high-temperature, smoke sensors

Digit21 = Packa ging

P = Domestic

C = Export

Digit22-24 = Factory Configuration Number

Digit25 = Configuration Code

A = No SFAs (Any alpha letter except S)

S = SFA

1.2 Component Location

The unit component locations are described in the submittal documents included in the Submittal Drawings on page127.

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

Table 1.3 Component-location Drawings

Docu ment Number Title

DPN003452 Component Location, Typical, Downflow Models, DA050–DA165

DPN003451 Component Location, Typical, Upflow Models, DA080–DA085

1 Nomenclature and Componen ts

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Vertiv | Liebert® D SE™ Installer/U ser Guide

2 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 Table 1.2 on page9, 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 on page127.

• Verify that the floor is level, solid and sufficient to support the unit. See 2.6 on page19 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.

2 Pre-inst allation Pr eparationan dGuidelines

13

2.1 Planning Dimensions

The unit, floor stand, and plenum dimensions are described in the submittal documents included in the Submittal Drawings
on page127.

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

Table 2.1 Dimension Planning Drawings

Docu ment Number Title

Downflow Units

DPN003533 Cabinet Dimensional Data, DA050

DPN004083 Cabinet Dimensional Data, DA080 and DA085

DPN003175 Cabinet andPlenum Dimensional Data, DA125, DA150 and DA165

UpflowUnits

DPN002950 Cabinet Dimensional Data, DA080U and DA085U

Floor Stands

DPN004079 Floorstand Dimensional Data, Downflow, DA050

DPN004073 Floorstand Dimensional Data, Downflow and Upflow, DA080 and DA085

DPN003177 Floorstand Dimensional Data, Downflow, DA125, DA150 and DA165

Plenums

DPN003514 Plenum Dimensional Data, Downflow, DA050, DA080 and DA085

DPN004081 Plenum Dimensional Data, Upflow, DA080U and DA085U

2.2 Air-distribution Considerations for Downflow Units

• Verify that the raised floor has been properly sized for the unit’s airflow and the room is free of airflow
restrictions.

• Perforated floor tiles in the raised floor should ensure minimal pressure loss.

• The raised floor must provide 7-1/2in. (191mm) of clearance.

• A minimum of 24in. (610mm) is required to operate the fans when they are lowered with the factory-provided
jacking mechanism.

• Ensure that there is adequate clearance above the unit for service, such as replacing filters.

• Optional plenums are available for downflow unit ducting.

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Vertiv | Liebert® D SE™ Installer/U ser Guide

Figure 2.1 Downflow unit field-installed ducting and plenum ducting for DA125, DA150 and DA165

2 Pre-inst allation Pr eparationan dGuidelines

15

2.3 Air-distribution Considerations for Upflow Units

For in-room applications with supply and return grilles, several feet of clearance must be maintained at the intake and
discharge of the unit.

NOTE: Drain traps are qualified to a return duct static of negative 1.5 i.w.g. (-1.5i.w.g).

Figure 2.2 Upflow ducting configurations for EC fans for DA080 and DA085

Item Description

1 Typical ducting. May run to either side.

2 Straight section must be 2.5 times the depthof blower.

3 Ducting only attached to flanges onprovidedplenum.

NOTE: Follow standard practices in all duct work.

2.4 Connections and System Setup

• Three-phase electrical service is required for all models. Electrical service must conform to national and local
electrical codes. See equipment nameplate for details.

• The unit requires a drain, which must comply with all applicable codes. See Field-installed, Gravity-fed Drain

Line Requirements on page31, for details.

• Plan the routing of wiring, piping and duct work to the unit. Refer to the appropriate piping connection location
drawings, piping schematics, and electrical-connection drawings for your system in Submittal Drawings on
page127.

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

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

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Vertiv | Liebert® D SE™ Installer/U ser Guide

The 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.

For DA080/085 the default PID values must be updated to special PID values when the condenser is installed at the same
level as the evaporator or +10 feet (3m) above the evaporator. The PID control values (both default and special) are noted
Table 2.2 below.

Table 2.2 EEV control values, default and special settings

EEV Settings

Model #

Default Values

(condenser and evaporator at same level ±10ft[3m])

Special Values

E144 = MAN

DA050

DA080/085
Downflow
Models

DA080/085
Upflow
Models

DA125/150
DA165

2.5 Operating Conditions

E160 = 0.6

E161 = 250

E162 = 1.0

E144 = MAN E144 = MAN

E160 = 0.7 E160 = 1.5

E161 = 250 E161 = 250

E162 = 4.2 E162 = 2.5

E144 = MAN

E160 = 2.5

E161 = 250

E162 = 4.2

E144 = MAN

E160 = 1.8

E161 = 250

E162 = 2.5

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.”

2.5.1 Cooling, Dehumidification and Humidification

The ASHRAE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 75°F (24°C).

Operating outside this envelope can decrease equipment reliability.

NOTE: If running in supply-air control, the minimum supply-air setpoint is 64°F (18°C).

2 Pre-inst allation Pr eparationan dGuidelines

17

DA050 Dehumidification Control

The DA050 is designed to maximize sensible cooling not latent cooling loads.

The room load must be at least 37.6kW (74% of unit capacity) to prevent over cooling the room at 85°F (29°C) return air
temperature while in dehumidification mode. If the room load is too low to maintain the setpoint, the compressor will cycle
On and Off. For rooms with multiple units, we recommend performing dehumidification via Teamwork mode to prevent
compressor cycling in case of lightly loaded rooms. Liebert® DSE units in dehumidification mode might not hold the
temperature setpoint unless there is sufficient room load. This will allow for better dehumidification of the room. The DSE
will allow the return air temperature to run down to 68°F (20°C) regardless of the temperature setpoint during
dehumidification mode of operation.

DA080 and DA085 Dehumidification Control

The DA080 and DA085 will run at lower evaporator temperatures than a DA125. This will result in a higher percentage of
latent cooling than with a DA125 at a given return air temperature. Dehumidification on DA080 and DA085 is possible with
only one circuit running. In dehumidification mode, with one circuit running, a single stage 15-kW electric reheat (customer
option) is available to help offset cooling for lightly loaded rooms, but over-cooling will be allowed down to 68°F (20°C). If
the unit is running in dehumidification mode with both circuits (compressors) running, the electric reheat is not available to
offset cooling.All DSE units allow the indoor blower to run at a reduced speed during dehumidification mode to increase the
amount of dehumidification being performed.

DA125 Dehumidification Control

The DA125 is designed to maximize sensible cooling not latent cooling loads. With all four compressors running, no reheat
will be available at this dehumidification load point (Stage 4).

The room load must be 94.1kW (74% of unit capacity) to prevent over-cooling the room at 85°F (29°C) return air
temperature. If the room load is too low to maintain the setpoint, the compressors will cycle On and Off. During Stage 3, with
three of the four compressors running, 10 kW of reheat will be available to offset cooling. During Stage 1 and 2, with one and
two compressors running respectively, 30 kW of reheat is available to offset cooling. For rooms with multiple units, We
recommend performing dehumidification in Teamwork mode to prevent compressor cycling in case of lightly loaded rooms
or by having standard DSE units available to perform dehumidification. DSE units in dehumidification mode might not hold
the temperature setpoint unless there is sufficient room load. This will allow for better dehumidification of the room. The DSE
will allow the return air temperature to run down to 68°F (20°C) regardless of the temperature setpoint during
dehumidification mode of operation.

DA150 and DA165 Dehumidification Control

The DA150 and DA165 are designed to maximize sensible cooling not latent cooling loads. With all four compressors
running, no reheat will be available at this dehumidification load point (Stage 4).

The room load must be 94.1kW (74% of unit capacity) to prevent over-cooling the room at 85°F (29°C) return air
temperature. If the room load is too low to maintain the setpoint, the compressors will cycle On and Off. During Stage 3, with
three of the four compressors running, 10 kW of reheat will be available to offset cooling. During Stage 1 and 2, with one and
two compressors running respectively, 30 kW of reheat is available to offset cooling. For rooms with multiple units, We
recommend performing dehumidification via Teamwork mode to prevent compressor cycling in case of lightly loaded
rooms. DSE units in dehumidification mode might not hold the temperature setpoint unless there is sufficient room load.
This will allow for better dehumidification of the room. The DSE will allow the return air temperature to run down to 68°F
(20°C) regardless of the temperature setpoint during dehumidification mode of operation.

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Vertiv | Liebert® D SE™ Installer/U ser Guide

2.5.2 Heating

The Liebert® DSE is qualified for heating-only operation at temperatures not exceeding 80°F (27°C).

2.5.3 Humidification Control

To prevent the humidifier from running when not required (especially when return air temperatures exceed 75°F [24°C]), the
default control for humidity and dehumidification is based on dew point temperature, not relative humidity. If this default
control is changed, adjust the relative humidity setpoint based on return air temperature to prevent from over-humidifying
the space.

2.6 Shipping Dimensions and Unit Weights

Table 2.3 Downflow unit domestic and export shipping dimensions and weights

Dom estic Packaging Export Packaging

Model #

Unit

Ship Weight, lb (kg)

Shippin g Dimensions, in. (mm) Sh ip Weight, lb (kg) Shipping Dimensions, in. (mm)

Dry Weight, lb (kg)

DA050*A

DA050*P

DA080*A

DA080*P

DA085*A

DA085*P

DA125*A

DA125*P

DA150*A

DA150*P

DA165*A

DA165*P

2012 (913)

2250 (1021)

2350 (1066)

3450 (1565)

3570 (1619)

3754 (1703)

97 X45 X 82

(2464X 1 143 X 2083)

120 X 45 X 85

(3048 X1143 X2159)

120 X 45 X 85

(3048 X 1143 X 2159)

153 X 54 X 85

(3886 X 1372 X 2159)

153 X 54 X 85

(3886 X 1372 X 2159)

153 X 54 X 85

(3886 X 1372 X 2159)

2182 (990)

2450(111 1)

2550 (1157)

3650 (1656)

3770 (1710 )

3954 (1794)

Table 2.4 Upflow unit domestic and export shipping dimensions and weights

Dom estic Packaging Export Packaging

Model #

Unit Ship Weight, lb (kg) Shipping dimensio ns, in. (mm) Ship Weight, lb (kg) Sh ipping dimensions, in.(m m)

97 X 45 X 82

(2464X 1 143 X 2083)

120 X 45 X85.5

(3048 X 1143 X2172)

120 X 45 X85.5

(3048 X 1143 X2172)

153. 5 X 54.5 X 85.5

(3899X 1384 X 2172)

153. 5 X 54.5 X 85.5

(3899X 1384 X 2172)

153. 5 X 54.5 X 83.5

(3899X 1384 X 2121)

1590( 721)

2200 (998)

2250 (1021)

3465 (1572)

3574 (1621)

3574 (1621)

Dry Weight, lb (kg)

DA080U*A

DA080U*P

DA085U*A

DA085U*P

2 Pre-inst allation Pr eparationan dGuidelines

2270 (1030)

2370 (1075)

120 X 45 X 85

(3048 X 1143 X 2159)

120 X 45 X 85

(3048 X 1143 X 2159)

2470 (1120)

2570 (11 66)

120 X 45 X85.5

(3048 X 1143 X 2172)

120 X 45 X85.5

(3048 X 1143 X 2172)

2150 (975)

2150 (975)

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Vertiv | Liebert® D SE™ Installer/U ser Guide

3 EQUIPMENT INSPECTION AND HANDLING

SAFETY INFORMATION

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.
Unit weights are specified in Shipping Dimensions and Unit Weights on page19.

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.
Shipping weights and unit weights are listed in the tables in Shipping Dimensions and Unit Weights on
page19. Use the center of gravity indicators on the unit to determine the position of the slings.

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.

3 Equipmen t Ins pection an d Hand ling

21

Equipment Recommended for Handling the Unit:

• Forklift

• Pallet jack

• Piano jacks

• Lift beam

• Slings

• Spreader bars

3.1 Packaging Material

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

3.2 Handling the Unit while Packaged

If possible, transport the unit with a forklift or pallet jack. If that is not possible, use a crane with slings and spreader bars
that are rated for the weight of the unit.

When using a forklift or pallet jack:

• Ensure that the fork length is suitable for the unit length and, if adjustable, spread to the widest allowable
distance that will fit under the skid.

• When moving the packaged unit, lift the unit from the "HEAVY SIDE" of the unit, and do not lift the unit any
higher than 6in.(152mm). All personnel except those moving the unit must be kept or more from the unit while
it is being moved.

• If the unit must be lifted higher than 6in.(152mm), all personnel not directly involved in moving the unit must
be 20ft (5m) or farther from the unit.

• Always refer to the location of the center-of-gravity indicators when lifting the unit, see Figure 3.1 below.

Figure 3.1 Center-of-gravity indicator

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Vertiv | Liebert® D SE™ Installer/U ser Guide

3.3 Unpacking the Unit

1. Remove the exterior stretch wrap packaging and two V-shaped boards from around the unit, as shown in Figure

3.2 below.

NOTE: The bag may remain in place to protect from dust and to protect the unit panels, or it may be removed for
immediate installation.

2. Remove the bag from the unit when ready to remove the skid and install the unit.

Figure 3.2 Unpacking the Unit

Item Description

1 Rem ove exterior wrap from unit

2 Remove corner and side packaging planks

3 Leave the bag on the unit until ready to install.

3.3.1 Removing the Unit from the Skid with a Forklift

Refer to Figure 3.3 on the next page.

1. Align a forklift with either the front or rear side of the unit.

• Ensure that the tines of the fork lift are locked to the widest location.

• Use the center of gravity indicators on the unit panels when determining the entry points for the tines.
Center of gravity varies per unit size and selected options.

• The tines shall be equally spaced on either side of the center of gravity indicator.

2. Insert the tines of the forklift completely under the base of the unit.

• Ensure that the tines are level, not angled in an upward direction.

• The tines are to be at a height that will allow proper clearance under the unit.

• Ensure that the tines extend beyond the opposite side of the unit.

NOTE: If these steps are not followed, damage may occur to the panels and/or base of the unit.

3 Equipmen t Ins pection an d Hand ling

23

3. Remove the lag bolts from each bracket located around the base, and remove the brackets.

4. Lift the unit off the skid to an elevation point where the skid is not supporting the weight of the unit and remove
the skid from under the unit.

Figure 3.3 Removing from skid with a forklift

Item Description

1 Align forklift with frontor rear of unit.

2 Insert tines completely under base of unit.

3 Remove lag boltsand brackets

4 Lift unit and remove skid.

3.3.2 Removing the Unit from theSkid Using Rigging

1. Use the center-of-gravity indicators on the unit panels to determine the position of the slings.

• The slings shall be equally-spaced on either side of the center-of-gravity indicator

2. Place the slings and between the bottom rails of the unit and the skid as shown in Figure 3.4 on the facing
page.

NOTE: Unit is shown without packaging. These instructions may be followed with or without the outer packaging in
place.

24

Vertiv | Liebert® D SE™ Installer/U ser Guide