Vertiv Liebert DSE060 Installer/user Manual

Liebert®

DSE™ PackagedSolution
ThermalManagementSystem

Installer/User Guide

60-kW (15-ton)Capacity

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

Vertiv |Liebert® DSE060™Installer/User Guide

TABLE OF CONTENTS

1 Important Safety Instructions 5

2 Nomenclature and Components 9

2.1 Liebert DSE060 Packaged Solution Configuration-number Nomenclature 9

2.2 Component Location 12

2.3 Air-flow Configurations 12

3 Pre-installation PreparationandGuidelines 13

3.1 Planning Dimensions 14

3.2 Connections and System Setup 14

3.2.1 Electrical Connections 14

3.2.2 Evaporator Condensate-drain Connection 14

3.3 Operating Conditions 16

3.3.1 Cooling 17

3.4 Unit Weights 17

4 Equipment Inspection and Handling 19

4.1 Rigging to Lift the Unit 20

4.2 Using Forklift to Install the Unpackaged Unit 21

5 Electrical Field Connections 23

6 Checklist for Completed Installation 27

6.1 Moving and Placing Equipment 27

6.2 Electrical Installation Checks 27

6.3 Other Installation Checks 27

6.4 BMS and Sensor Installation Checks 28

7 Initial Start-up Checks andCommissioningProcedure forWarrantyInspection 29

8 Maintenance 31

8.1 Service/Maintenance Access to the Evaporator Compartment 32

8.2 Filters 32

8.2.1 Filter-replacement 32

8.3 Evaporator Blower Drive System—EC Fans 34

8.3.1 Protective Features 34

8.3.2 Fan Impellers and Bearings Maintenance 35

8.3.3 Fan Assembly Troubleshooting 35

8.3.4 Removing Evaporator EC Fans 39

8.4 Electronic Expansion Valve (EEV) Maintenance 41

8.5 Compressor Maintenance 42

8.5.1 Compressor Oil 42

8.5.2 Rotalock Valve 42

8.5.3 Replacement Compressors 43

8.5.4 Compressor Motor Burnout 43

8.5.5 Unloading Solenoid(s) on a Digital-scroll Compressor 43

8.5.6 Replacing the Compressor 43

Vertiv | Liebert® DSE060™ Installer/User Guide | 3

8.6 Evaporator Coil 44

8.7 General Condenser Maintenance 44

8.8 Condenser Cleaning 44

8.8.1 When to Clean the Condenser Coil 44

8.8.2 What to Use to Clean the Condenser Coil 45

8.8.3 Cleaning the Condenser Coil 45

8.8.4 Cleaning the Condenser Fan 46

8.9 Replacing the Condenser Fan 46

8.9.1 Verifing the Fan Address 53

8.10 Replacing the Premium-efficiency Control Board 57

8.10.1 Preparing to Replace the Board 57

8.10.2 Installing the Replacement Board 59

8.11 Pumped-refrigerant Economizer (PRE) 60

9 Preventive Maintenance Checklist 61

Appendices 67

Appendix A: Technical Support and Contacts 67

Appendix B: Submittal Drawings 69

Vertiv | Liebert® DSE060™ Installer/User Guide | 4

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®DP060. 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 on the exterior of the enclosure. 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 component 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.

1 Important Safety Instructions

5

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 pressurized doors flying open or slamming closed suddenly. Can cause
serious injury. Do not attempt to open doors while fans are running. Do not turn on fans with
doors open. Before opening the door, open all local and remote electric power supply
disconnect switches, verify with a voltmeter that power is off, and verify that all fans have
stopped rotating. Do not leave unsecured objects in the fan's bay after any maintenance
operation.

WARNING! Risk of contact with flying objects. Can cause serious injury or death. Do not leave
unsecured objects or tools in the fan's bay after performing maintenance operations. Re-install
all panels before starting up this unit after maintenance is performed.

WARNING! Risk of very heavy, 250-lb (113.4-kg) condenser fan modules and 125-lb (57-kg)
evaporator 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 Table 3.3 on page17. Use the center of gravity indicators on the unit
to determine the position of the slings.

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.

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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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.

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 contact with hot surfaces. Can cause burn injury. The EC fans and
electronics housing are extremely hot during operation. Allow sufficient time for them to cool
to a touch-safe temperature before handling. Use extreme caution and wear appropriate,
OSHA-approved PPE when replacing or performing maintenance on the EC fans.

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. Fan
modules weigh in excess of weigh in excess of 125lb (57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 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 Important Safety Instructions

7

NOTICE

NOTICE

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: 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.

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

Liebert®DP060 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
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 operation in high-humidity conditions. Can cause unit damage and water
carryover.

The Liebert® DP060 operates only as a sensible cooling unit and does not provide
dehumidification.

NOTE: The Liebert® cooling unit has a factory-installed high pressure safety switch in the high-side
refrigerant circuit.

Agency Listed

Standard 60-Hz units are CSA Certified to the harmonized U.S. and Canadian product safety standard
CSA C22.2 No 236/UL 1995 for “Heating and Cooling Equipment” and are marked with the CSA c-us logo.

8

Vertiv | Liebert® DSE060™ Installer/User G uide

2 NOMENCLATURE AND COMPONENTS

This section describes the configuration number for Liebert® DP060 units and components.

2.1 Liebert DSE060 Packaged Solution Configuration-number Nomenclature

The following tables describe each digit of the 40-digit DP060 configuration number. The 14-digit model
number consists of the first 10 digits and last 4 digits of the configuration number.

Table 2.1 DSE060 Configuration-number Digits 1 to 10 Example

Configuration -number Digits 1 to 10 = first 1 0 digits of 14-digit model number

1 2 3 4 5 6 7 8 9 10

D P 0 6 0 T P 1 A D

Table 2.2 DSE060 Configuration-number Detail Digits 11 to 21 Example

Configuration-number Detail Digits 1 1 to 21

11 12 13 14 15 16 17 18 19 20 21

0 2 0 8 1 6 L D B 0 P

Table 2.3 DSE060 Configuration-number Detail Digits 22 to 36 Example

Configuration-number Detail Digits 22 to 36

22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

0 A A 1 0 0 0 0 0 0 0 0 0 0 0

Table 2.4 DSE060 Configuration-number
Digits37to40Example

Configuration -number Digits 37 to 40 = last 4 d igits of 14-digit model number

37 38 39 40

# # # A

Table 2.5 DSE060 Packaged Solution Configuration-number Digit Definitions

Digit Description

Digits 1 and 2 = Product Family

DP = Liebert® Packaged DSE

Digit 3 to 5 = Cooling Capacity, kW

Nominalsensible capacity, kW

Digit 6 = Air Discharge

T = Perimeter, top inlet/front supply

Digit 7 = System Type

P = Air-cooled, EconoPhase ready

2 Nomenclature and Components

9

Table 2.5 DSE060 Packaged Solution Configuration-number Digit Definitions (continued)

Digit Description

Digit 8 = Air-flow (Fan Type)

1 = EC plug fans

Digit 9 = Power Supply

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

Digit 10 = Cooling System

D = Digital scroll, R-410A

Digit 11 = Humidifier

0 = None

Digit 12 = Display

2 = Liebert® iCOM HighDefinition

Digit 13 = Options

0 = None

Digit 14 = Air Filter

8 = MERV 8, 4-in.

9 = MERV 11, 4-in.

Digit 15 = CoilOption

1 = Non-coated coils, evaporator and condenser

Digit 16 = Enclosure Option

6 = Standard color, pebble-gray

Digit 17 = High-voltage option

L = Locking disconnect

6 = Dual disconnect with reversing starter

Digit 18 = Option packages

D = Low-voltage terminal package + Remote humidifier contact

Digit 19 = Monitoring

B = Base Comms & Connectivity

Digit 2 0 = Sensors

0 = None

Digit 2 1 = Packaging

P = Domestic

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Table 2.5 DSE060 Packaged Solution Configuration-number Digit Definitions (continued)

Digit Description

Digit 2 2 = Controls

0 = None

S = Quick-start and Capacitive buffer (contact the factory)

Digit 2 3 =EconoPhase

A = Standard capacity

Digit 2 4 = Condenser Coil

A = Standard ambient condenser

Digit 2 5 = 120-V Options

1 = 120V Utility Power, Customer-supplied

T = 120-V utilitypower from main-unit power supply

Digit 2 6 = Option

0 = No power meter

P = Power meter (Contact the factory)

Digit 2 7 = Option

0 = None

Digit 2 8 = Option

0 = None

Digit 2 9 = Condensate Pump

0 = None

Digit 30 to 36

0 = Placeholder

Digit 37 to 39 = Factory Configuration Number

Digit 40 = Configuration Code

A = No SFA

S = SFA

2 Nomenclature and Components

11

2.2 Component Location

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

Drawings on page69.

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

Table 2.6 Component-location Drawings

Document Number Title

DPN004597 Component Location, Perimeter Unit

2.3 Air-flow Configurations

Table 2.7 Perimeter unit air-flow schematic and duct connection

Document Number Title

DPN004598 Airflow Schematic, Perimeter Unit

DPN004599 Evaporator Ducting DimensionalData

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3 PRE-INSTALLATION PREPARATIONANDGUIDELINES

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

Refer to DSE060 Packaged Solution Configuration-number Digit Definitions (continued) on page11, and
submittal drawings to determine the type of system being installed and anticipate building alterations
and ductwork needed.

The unit and anchor dimensions are described in the submittal documents included in the Submittal

Drawings on page69.

• Verify that mounting surface/roof top is level, solid and sufficient to support the unit. See

DP060 unit weights on page17, for unit weights.

• Verify that the support structure for the unit (concrete or other type) has a flat, regular
surface and is adequate to support the unit operating weight.

• Verify that adequate water-control/drain system is in place per local code. Refer to the
appropriate submittal drawing, listed in Dimension Planning Drawings on the next page, for the
condensate drain-line location and connection size.

• Verify that the high-voltage electric-supply lines are adequately sized based on the electrical
specification on the unit's name plate and meet local code.

• Verify that the utility electric-supply lines (lights and outlet) are adequately sized and meet
local code.

• Verify that all control and communication wiring are properly routed to the unit control panel
and meet local code.

• Confirm that the conditioned space has a proper envelope and vapor barrier.

• Handle outside air and humidity control externally to the Liebert® DP060 unit. The DP060
does not control humidity and is not intended to handle outside air.

• Allow at least the minimum recommended clearances for maintenance and service. See the
appropriate submittal documents for dimensions in Submittal Drawings on page69

• Ensure that there is no obstruction when installing ductwork connections and transitions to
minimize friction losses and turbulence.

• Verify that all duct joints are sealed to prevent air leakage or water penetration.

3 Pre-installation PreparationandGuidelines

13

3.1 Planning Dimensions

The unit and anchor dimensions are described in the submittal documents included in the Submittal

Drawings on page69.

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

Table 3.1 Dimension Planning Drawings

Document Number Title

DPN004600 Cabinet and Anchor DimensionalData

DPN004599 Evaporator Ducting DimensionalData

DPN004601 Condensate-drain Access and Location

DPN004602 Evaporator Compartment Service Area

DPN004756 Installation andService Clearance for Multiple Units

3.2 Connections and System Setup

3.2.1 Electrical Connections

• Three-phase electrical service is required for all models. Electrical service must conform to
national and local electrical codes. See Electrical Field Connections on page23, for the details.

3.2.2 Evaporator Condensate-drain Connection

Connect the condensate-drain line to an adequate water-drain system. See 3.2 above, for the connection
on the unit. Observe the following requirements and Figure 3.2 on page16, when installing and routing
the drain line:

• Insulate the field-supplied condensate-drain piping with heat trace so it will not freeze.

• The line must be the full size of the drain connection. The connection port is 3/4-in. pipe with
CPVC 3/4-in. FPT fitting.

• Slope the drain line continuously away from the unit, and pitch the drain line a minimum of 1/8­in. (3.2-mm) per 1ft (305mm) toward the drain.

• The line must be made of a material that is suitable for draining water and be rigid enough that
it does not sag between supports, which creates unintentional traps.

• The drain line must comply with all applicable codes.

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Figure 3.1 Condensate Drain Location

Item Description

1 Condensate-drain connection

3 Pre-installation PreparationandGuidelines

15

Figure 3.2 Correct and Incorrect condensate-drain line

Table 3.2 Evaporator Drain-line Figure Descriptions

Item Description

1 Correct drain-line installation

2 Incorrect drain-line installation

3 DSEunit

4 Internal drain

5 Externaldrain

6 Continuousdownward slope

7 External trap. Do not trap externally.

8 External traps, although unintentional. Lines must be rigidenough not to bow over top of other objects.

3.3 Operating Conditions

The Liebert® DP060 must supply air to a conditioned space within the operating envelope that ASHRAE
recommends for data centers. Operating the DP060 outside of this envelope can decrease equipment
reliability. Refer to ASHRAE’s publication, “Thermal Guidelines for Data Processing Environments.”

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3.3.1 Cooling

The recommended maximum return-air temperature is 105°F (40°C) and maximum dew point is 59°F
(15°C). The recommended minimum return-air temperature setpoint Dry Bulb is 85°F (29°C).

Operating outside this envelope can decrease equipment reliability.

NOTE: If running in supply-air control, the minimum supply-air setpoint is 68°F(20°C), and the
maximum supply air temperature is 80°F (27°C).

NOTE: When running above 77°F (25°C) supply air temperature, the superheat readings on the
refrigeration circuits may be higher than 7.2°F(–14°C). The EEVs will run out of stroke and limit mass
flow, which will result in higher than normal superheat.

3.4 Unit Weights

Table 3.3 DP060 unit weights

Model Weight, lb (kg)

DP060 Perimeter 5,500 (2,495)

3 Pre-installation PreparationandGuidelines

17

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4 EQUIPMENT INSPECTION AND HANDLING

SAFETY INFORMATION

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 DP060 unit weights on page17.

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.

• 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.

• Always refer to the location of the center-of-gravity indicators when lifting the unit, see Center-

of-Gravity Indicators on the next page.

Equipment Recommended for Handling the Unit:

• Lift beam

• Slings

• Spreader bars

• Shims and blocks

4 Equipment Inspection and Handling

19

Figure 4.1 Center-of-Gravity Indicators

Item Description

1 Center-of-gravity marker

4.1 Rigging to Lift the Unit

See Lugs to attach rigging to a perimeter-unit configuration on the facing page, for the location of the
lifting lugs on the unit, and use spreader bars and/or shimmed blocks to prevent damage to the unit.

• Unit must remain level when lifted to prevent damage to internal equipment.

• Do not place unit directly on the ground. If the unit must be set down, use shims or blocks for
leveling and to keep unit off the ground.

Before lifting or moving, clear the area of all unnecessary personnel. Clear the area of any debris and
unrelated tools or foreign objects.

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Figure 4.2 Lugs to attach rigging to a perimeter-unit configuration

Item Description

1 Lugs to attach rigging. Typical both sides.

4.2 Using Forklift to Install the Unpackaged Unit

The forklift must be rated for at least 5,500 lb (2495 kg) and the fork length can be no less than 8ft
(2.4m). See Typical Center Line of Fork Pockets on the next page, for the location of fork pockets. The
unit can be lifted from either side.

Place protective material between the fork mast and unit to prevent external damage to the unit.

4 Equipment Inspection and Handling

21

Figure 4.3 Typical Center Line of Fork Pockets

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5 ELECTRICAL FIELD CONNECTIONS

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 to the appropriate submittal drawing, listed in Electrical Field-connection Drawings
on page25, for electrical service entrances into unit

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

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 on the exterior of the enclosure. 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 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.

5 Electrical FieldConnections

23

NOTICE

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: 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.

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 start up to verify that the three-phase power is connected properly.
The EC fans are not a reliable indicator of proper connection. The blowers will rotate the same
direction, regardless of the three-phase power input. 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 start up to ensure that the compressors are running in the
correct direction.

NOTICE

Risk of improper electrical supply connection. Can cause equipment damage. 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 electrical connection to prevent water leakage. Connections must be
water-tight. Failure to do so risks damage to the outdoor unit.

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Vertiv | Liebert® DSE060™ Installer/User G uide

The unit requires two separate power-supply connections:

• A 3-phase; 208-V, 230-V, 460-V. or 575-V; 60-Hz, power supply to the DP060 unit electrical
enclosure.

• A separate 120-V power feed to the unit electrical enclosure (for light switches/convenience
outlet).

Table 5.1 Electrical Data—DP060, 60Hz

Unit V oltage Rating

208V, 3ph, 60Hz

230 V, 3ph, 60Hz

460 V, 3ph, 60 Hz

575 V, 3ph, 60 Hz

standard ambient condenser:

Total system with

FLA 70.1 76.4

WSA 84.4 90.6

OPD 125 125

FLA 66.9 79.4

WSA 79.8 92.3

OPD 125 125

FLA 33.2 39.4

WSA 39.6 45.8

OPD 60 60

FLA 27.5 33.8

WSA 33.0 39.3

OPD 50 60

without 120-V transformer with 120- V transformer

The electrical connections are described in the submittal documents included in the Submittal Drawings
on page69. After all unit wiring is complete, you can use the iCOM control to set operating setpoints. See
the Liebert® iCOM User Guide, SL-31075.

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

Table 5.2 Electrical Field-connection Drawings

Document Number Title

DPN004587 Electrical Connections Enclosure, Dualpower input

DPN004732 Electrical Connections Enclosure, Single power input

DPN004591 Evaporator Electrical Panel component definitions and locations

DPN004350 Liebert® iCOM Unit-mounted Display

DPN000960 Liebert® iCOM Remote temperature and humidity sensor

DPN003144 Liebert® iCOM Service bracket

Unit-to-Unit Networking

DPN004351 Liebert® iCOM Unit-to-unit Network Connections

5 Electrical FieldConnections

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6 CHECKLIST FOR COMPLETED INSTALLATION

6.1 Moving and Placing Equipment

1. Unpack and check received material.

2. Proper clearance for service access has been maintained around the equipment.

3. Equipment is level and mounting fasteners are tight.

4. Proper condensate-drain system is in place.

6.2 Electrical Installation Checks

1. Supply voltage and phase matches equipment nameplate.

2. Power wiring connections completed to the disconnect switch.

3. Power line circuit breakers or fuses have proper ratings for equipment installed.

4. All internal and external high- and low-voltage wiring connections are tight.

5. Confirm that unit is properly grounded to an earth ground.

6. Control transformer setting matches incoming power.

7. Electrical service conforms to national and local codes.

8. Confirm that power-wiring connections to the utility box are completed.

6.3 Other Installation Checks

1. Ducting complete.

2. Confirm ducting is attached to unit and building structure, and any openings around supply­and return-duct connections are sealed.

3. Filters installed.

4. Check fasteners that secure evaporator-fan motors—some may have become loose during
shipment.

5. Check blowers and compressor for proper rotation.

6. Drain line connected, not obstructed, and pitched per local code.

7. All fans are free of debris.

8. Seal openings around electrical connections and make sure that the seals are water-tight.

9. Installation materials and tools have been removed from equipment (literature, shipping
materials, construction materials, tools, etc.).

10. Check for refrigerant leaks.

11. Make sure heat load is available during initial start-up. Consult factory for assistance.

6 Checklist for CompletedInstallation

27

6.4 BMS and Sensor Installation Checks

1. CAT5 cables are installed from each unit and the network switch, and all cables have RJ45
jacks on each end.

2. The network switch/Liebert® vNSA panel (if present) is installed and powered.

3. Confirm the static-pressure-sensor transducer (if present) is installed in the room and wired
back to the DP060 unit

4. Confirm the supply-air sensor is installed in the best location possible to obtain a temperature
reading representative of the supply air in the duct or plenum serviced by the unit and that
the sensor is wired back to the unit control panel.

5. All remote and 2T rack sensors (if present) are installed and wired using CANBUS cables.

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Vertiv | Liebert® DSE060™ Installer/User G uide

7 INITIAL START-UP CHECKS
ANDCOMMISSIONINGPROCEDURE
FORWARRANTYINSPECTION

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 on the exterior of the enclosure. 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 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.

NOTICE

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 start up to verify that the three-phase power is connected properly.
The EC fans are not a reliable indicator of proper connection. The blowers will rotate the same
direction, regardless of the three-phase power input. 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 start up to ensure that the compressors are running in the
correct direction.

• Confirm that all items on Checklist for Completed Installation on page27 have been done.

• Locate “Liebert® DP060 Warranty Inspection Check Sheet” in the unit’s electric panel.

• Complete “Liebert® DP060 Warranty Inspection Check Sheet” during start-up.

• Forward the completed “Liebert® DP060 Warranty Inspection Check Sheet” to your local sales
office. This information must be completed and forwarded to validate warranty.

• Contact your local sales representative or technical support if you have any questions or
problems during unit start-up and commissioning. Visit https://www.vertivco.com/en­us/support/ or call 1-800-543-2778 for contacts.

7 Initial Start-up Checks andCommissioningProcedure forWarrantyInspection

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