Vertiv Liebert DSE Installer/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.VertivCo.com/en-us/support/ for additional assistance.

Vertiv | Liebert® DSE™ Installer/UserGuide

TABLE OF CONTENTS

1 Important Safety Instructions 5 2 Nomenclature and Components 11

2.1 Liebert DSE Model-number Nomenclature 11

2.2 Component Location 13

2.3 Cooling Configurations 13

3 Pre-installation PreparationandGuidelines 17

3.1 Planning Dimensions 17

3.2 Air-distribution Considerations for Downflow Units 18

3.3 Air-distribution Considerations for Upflow Units 19

3.4 Connections and System Setup 19

3.5 Operating Conditions 20

3.5.1 Cooling, Dehumidification and Humidification 20

3.5.2 Heating 21

3.5.3 Humidification Control 22

3.6 Shipping Dimensions and Unit Weights 22

4 Equipment Inspection and Handling 23

4.1 Packaging Material 23

4.2 Handling the Unit while Packaged 24

4.3 Unpacking the Unit 25

4.3.1 Removing the Unit from the Skid with a Forklift 25

4.3.2 Removing the Unit from theSkid Using Rigging 26

4.3.3 Moving the Unit to the Installation Location Using Piano Jacks 28

4.4 Placing the Unit on a Floor Stand 30

5 Piping and Refrigerant Requirements 31

5.1 Drain and Humidifier Fluid Piping 32

5.1.1 Field-installed, Gravity-fed Drain Line Requirements 32

5.1.2 Condensate-pump Drain Line Requirements 34

5.1.3 Water Supply-line Requirements for the Optional Humidifier 34

5.2 Refrigerant Piping and Charging 35

5.2.1 Refrigerant Piping Guidelines forAir-cooledSystems 35

5.2.2 Refrigerant Line Sizes and Equivalent Lengths 36

5.2.3 Refrigerant Charge Requirements for Air-cooled Systems 37

5.2.4 Additional Oil Requirements forScrollandDigital-scrollCompressors 38

5.2.5 Evacuation, Leak-testing, and Charging Air-cooled Systems withReceivers 40

6 Electrical Connections 43 7 EC Fans and Plenums 45

7.1 Downflow Units with EC Fans 45

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

7.2 Downflow Units with Filter Plenums andUpflow-unitPlenumswithECFans 47

7.2.1 Downflow Unit Filter Plenums 47

7.2.2 Upflow Unit Plenums with EC Fans 48

8 Checklist for Completed Installation 49

8.1 Moving and Placing Equipment 49

8.2 Electrical Installation Checks 49

8.3 Piping Installation Checks 49

8.4 Other Installation Checks 49

9 Initial Start-up Checks andCommissioning Procedure forWarrantyInspection 51

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10 Maintenance 53

10.1 Filters 54

10.1.1 Filter-replacement for Downflow Units 54

10.1.2 Filter-replacement for Upflow Units 55

10.2 Blower Drive System—EC Fans 56

10.2.1 Protective Features 56

10.2.2 Fan Impellers and Bearings Maintenance 57

10.2.3 Fan Assembly Troubleshooting 57

10.2.4 Removing EC Fans from Downflow Units 60

10.2.5 Removing EC Fans from Upflow Units 63

10.3 Infrared Humidifier Maintenance 67

10.3.1 Cleaning Humidifier Pan and Float Switch 67

10.3.2 Changing Humidifier Lamps 68

10.4 Condensate-drain and Condensate-pump System Maintenance 69

10.4.1 Condensate Drain 69

10.4.2 Condensate Pump 69

10.5 Electric Reheat Maintenance 69

10.6 Electronic Expansion Valve (EEV) Maintenance 70

10.7 Compressor Maintenance 70

10.7.1 Compressor Oil 70

10.7.2 Rotalock Valve 71

10.7.3 Replacement Compressors 71

10.7.4 Compressor Motor Burnout 71

10.7.5 Unloading Solenoid(s) on a Digital-scroll Compressor 71

10.7.6 Replacing the Compressor 72

10.8 Evaporator Coil Performance 72

10.9 Air-Cooled Condenser Maintenance 73

11 Preventive Maintenance Checklist 75 Appendices 81

Appendix A: Technical Support and Contacts 81 Appendix B: Disassembling the DSE for Transport 83 Appendix C: Submittal Drawings 93

Vertiv | Liebert® DSE™ 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®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 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.

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. 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.

1 Important Safety Instructions 5

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22. 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 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22.

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.

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).

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.

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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, OSHA-approved PPE should attempt to remove or install cabinet panels.

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 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 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 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.

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.

1 Important Safety Instructions 7

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®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.

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 completely demineralized water with this unit. The water must contain minerals for the electrode principle to work.

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

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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.

This line may contain boiling water. Use copper or other material that is rated for handling boiling water for the drain line. Sagging condensate drain lines may inadvertently create 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.

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.

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 highside 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.

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.VertivCo.com or call our worldwide technical support.

• Toll Free: 00 80011554499

• Toll Number Based in Italy: +39 0298250222

1 Important Safety Instructions 9

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2 NOMENCLATURE AND COMPONENTS

This section describes the model-number configuration 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 Example

Model Number Digits 1 to 10 Model Details

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 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

Model Number Digits 11 to

14

Table 2.2 DSE Model-number Digit Definitions

Digit Description

Digits 1and2 = Product Family

DA = Liebert® DSE

Digit 3, 4, 5 = NominalCoolingCapacity, kW

050 = 50 kW

080 = 80 kW

085 = 85 kW

125 = 125 kW

150 = 150 kW

165 = 165kW

Digit 6 = Air Discharge

D = Downflow

U = Upflow

Digit 7 = System Type

A = Air-cooled

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

Digit 8 = Air-flow (FanType)

1 = EC plug fans

Digit 9 = Voltage

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

Digit 10 = CoolingSystem

D = Digital scroll, R-410A

T = Tandem with digital scroll, R-410A

2 Nomenclature and Components 11

Table 2.2 DSE Model-number Digit Definitions (continued)

Digit Description

Digit 11 = Humidifier

0 = No humidifier

H = Infrared Humidifier

Digit 12 = Display

2 = iCOM (High Definition)

Digit 13 = Reheat

0 = None

1 = Electric reheat, standard capacity

R = Electric reheat, reduced capacity

Digit 14 = 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.

Digit 15 = CoilOption

1 = Non-coated coil, indoor unit

Digit 16 = Enclosure Option

1 = Color standard

2 = Color optional

3 = Color standard and IBC/OSHPD bracing

4 = Color optional and IBC/OSHPD bracing

Digit 17 = High-voltage option

L = Locking disconnect

5 = Locking disconnect, with condensate pump

Digit 18 = Option packages

0 = None

L = Option package #1 - low-voltage terminalpackage

H = Reheat and Humidifier lockout

R = Remote humidity contact

C = Option package #1 plus reheat/humidifier lockout

D = Option package #1 plus remote humidifier lockout

E = Option package #1 plus reheat/humidifier lockout plusremote contact

F = Remote humidity contact plus reheat/humidifier lockout

Digit 19 = Monitoring

B = Base comms andconnectivity

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Table 2.2 DSE Model-number Digit Definitions (continued)

Digit Description

Digit 20 = Sensors

0 = None

S = Smoke sensor

H = High-temperature sensor

F = Smoke andHigh-temperature sensors

C = Compressor-overload sensors

A = Compressor, high-temperature sensors

D = Compressor, smoke sensors

K = Compressor, high-temperature, smoke sensors

Digit 21 = Packaging

P = Domestic

C = Export

Digit 22-24 = Factory Configuration Number

Digit 25 = Configuration Code

A = 1

S = SFA

2.2 Component Location

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

Drawings on page93.

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

Table 2.3 Component-location Drawings

Document Number Title

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

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

2.3 Cooling Configurations

NOTE: All field-installed piping must comply with applicable local, state and federal codes. Refer to

Piping, for detailed information.

2 Nomenclature and Components 13

Figure 2.1 DSE with Liebert® MC Condenser

Table 2.4 DSE with MC Condenser Cooling Descriptions

Item D escription

Air-Cooled with EconoPhase Pumping Unit—Allthe features of a standard air-cooled system, with the added benefit of an

1

economizer mode that can be used when the outdoor temperature is cold enough to cool the refrigerant enough to suspend use of the compressors.

2 Air-cooled— configured as aDX-only system (no economization).

3 Liebert® DSE™Thermal Management System

4 Liebert® EconoPhase™ Pumped-refrigerant Economizer

5 Liebert® MC™ Condenser with DSEreceivers.

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Figure 2.2 DSE with Liebert® MCV Condenser and EconoPhase Pumping Unit

Table 2.5 DSE Air-cooled with MCV Condenser and EconoPhase Pump Cooling Descriptions

Item D escription

Air-cooled with Liebert® MCV™ Condenser with Econo-Phase™ PumpingUnit—All the features ofa standard air-cooled

1

system, with the added benefit of an economizer mode that can be used when the outdoor temperature is cold enough to cool the refrigerant enough to suspend use of the compressors.

2 Liebert® DSE™Thermal Management System

Liebert® MCV™ Condenser with EconoPhase Pumping unit and DSEreceivers mounted, wired, and piped on a common

3

heat-rejection skidfor ease of job-site deployment.

2 Nomenclature and Components 15

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3 PRE-INSTALLATION PREPARATIONANDGUIDELINES

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

Refer to Table 2.2 on page11, and submittal drawings to determine the type of system being installed and anticipate building alterations, piping and ductwork needed.

The unit dimensions, pipe-connection locations, and piping schematics are described in the submittal documents included in the Submittal Drawings on page93.

• Verify that the floor is level, solid and sufficient to support the unit. See 3.6 on page22 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 on page93.

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

Table 3.1 Dimension Planning Drawings

Document Number Title

Downflow Units

DPN003533 Cabinet DimensionalData, DA050

DPN004083 Cabinet DimensionalData, DA080 and DA085

DPN003175 Cabinet andPlenum DimensionalData, DA125, DA150 and DA165

Upflow Units

DPN002950 Cabinet Dimensional Data, DA080U and DA085U

Floor Stands

DPN004079 Floorstand DimensionalData, Downflow, DA050

DPN004073 Floorstand DimensionalD ata, D ownflow and Upflow, DA080 and DA085

DPN003177 Floorstand DimensionalData, Downflow, DA125, DA150 and DA165

Plenums

DPN003514 Plenum DimensionalData, Downflow, DA050, DA080 and DA085

DPN004081 Plenum Dimensional Data, Upflow, DA080U andDA085U

3 Pre-installation PreparationandGuidelines 17

3.2 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.

Figure 3.1 Downflow unit field-installed ducting and plenum ducting for DA125, DA150 and DA165

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3.3 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 3.2 Upflow ducting configurations for EC fans for DA080 and DA085

Item D escription

1 Typical ducting. Mayrun to either side.

2 Straight sec tion muse be 2.5 times the depth of blower.

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

NOTE: Follow standard practices in all ductwork.

3.4 Connections and System Setup

• The unit requires a drain, which must comply with all applicable codes. This drain line may contain boiling water. See Field-installed, Gravity-fed Drain Line Requirements on page32, for details.

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

• Plan the routing of wiring, piping and ductwork 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93.

• 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.

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.

3 Pre-installation PreparationandGuidelines 19

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 3.2 below.

Table 3.2 EEV control values, default and special settings

EEV Settings

Model #

DA050

DA080/085 Downflow Models

DA080/085 Upflow Models

DA125/150 DA165

Default Values

E144= MAN E144= MAN

E160 = 0.7 E160 = 1.5

E161= 250 E161= 250

E162 = 4.2 E162 = 2.5

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

Special V alues

E144= MAN

E160 = 0.6

E161= 250

E162 = 1.0

E144= MAN

E160 = 2.5

E161= 250

E162 = 4.2

E144= MAN

E160 = 1.8

E161= 250

E162 = 2.5

20

3.5 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.”

3.5.1 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).

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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.

3.5.2 Heating

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

3 Pre-installation PreparationandGuidelines 21

3.5.3 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.

3.6 Shipping Dimensions and Unit Weights

Table 3.3 Downflow unit domestic and export shipping dimensions and weights

Domestic Packaging Export Packaging

Model #

Unit

Ship Weight, lb

(kg)

Shipping D imensions, in.

(mm)

Ship Weight, lb

(kg)

Shipping D imensions, 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

(2464 X 1143 X 2083)

120 X 45 X 85

(3048 X1143 X2159)

120 X 45 X 85

(3048 X 1143 X 2159)

153 X 54X 85

(3886 X 1372 X 2159)

153 X 54X 85

(3886 X 1372 X 2159)

153 X 54X 85

(3886 X 1372 X 2159)

2182 (990)

2450(1111)

2550 (1157)

3650 (1656)

3770 (1710)

3954 (1794)

97 X 45 X 82

(2464 X 1143 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

(3899 X 1384 X 2172)

153.5 X 54.5 X 85.5

(3899 X 1384 X 2172)

153.5 X 54.5 X 83.5

(3899 X 1384 X 2121)

Table 3.4 Upflow unit domestic and export shipping dimensions and weights

Domestic Packaging Export Packaging

Model #

DA080U *A

DA080U *P

DA085U*A

DA085U*P

Unit S hip Weight, lb

(kg)

2270 (1030)

2370 (1075)

Shipping d imensions, in.

(mm)

120 X 45 X 85

(3048 X 1143 X 2159)

120 X 45 X 85

(3048 X 1143 X 2159)

Ship Weight, lb

(kg)

2470 (1120)

2570 (1166)

Shipping d imensions, in.

(mm)

120 X 45 X85.5

(3048 X 1143 X 2172)

120 X 45 X85.5

(3048 X 1143 X 2172)

1590( 721)

2200 (998)

2250 (1021)

3465 (1572)

3574 (1621)

Dry Weight, lb

(kg)

2150 (975)

22

Vertiv | Liebert® DSE™ Installer/UserGuide

4 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22.

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

• Pallet jack

• Piano jacks

• Lift beam

• Slings

• Spreader bars

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 Handling 23

4.2 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

4.1 below.

Figure 4.1 Center-of-gravity indicator

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Vertiv | Liebert® DSE™ Installer/UserGuide

4.3 Unpacking the Unit

1. Remove the exterior stretch wrap packaging and two V-shaped boards from around the unit, as shown in Figure 4.2 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 4.2 Unpacking the Unit

Item D escription

1 Remove exterior wrap from unit

2 Remove corner and side packaging planks

3 Leave the bag onthe unit until readyto install.

4.3.1 Removing the Unit from the Skid with a Forklift

Refer to Figure 4.3 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.

4 Equipment Inspection and Handling 25

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 4.3 Removing from skid with a forklift

Item D escription

1 Align forklift with front or rear ofunit.

2 Insert tines completely under base of unit.

3 Remove lag bolts and brackets

4 Lift unit andremove skid.

4.3.2 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 4.4 on the facing page.

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

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Vertiv | Liebert® DSE™ Installer/UserGuide

Figure 4.4 Example sling placement

Item D escription

1 Distance between sling and center-of-gravity marker equalto item2.

2 Distance between sling and center-of-gravity marker equalto item1.

4 Equipment Inspection and Handling 27

3. Referring to Figure 4.5 below:

• Align the slings as described previously.

• Use spreader bars or equivalent device to ensure proper protection of the unit (Item 1).

• Remove the lag bolts from each bracket located around the base, and remove the brackets (Item 2).

NOTE: Depending on final installation location, the skid may need to remain under the unit. Therefore, the lag bolts and brackets would not yet be removed.

• 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 (Item 3).

Figure 4.5 Moving unit with rigging

Item D escription

1 Spreader bars and rigging onunit.

2 Remove lag bolts and brackets.

3 Lift the unit and remove the skid.

4.3.3 Moving the Unit to the Installation Location Using Piano Jacks

Refer to Figure 4.6 on the facing page.

1. With the unit elevated, position piano jacks at each end of the unit.

2. Lower the unit to a height suitable for the piano jacks, place protective material between the unit and the piano jacks and straps.

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Vertiv | Liebert® DSE™ Installer/UserGuide

3. With the unit secured to the piano jacks, move the forklift away from the unit.

4. Using the piano jacks, at least two trained personnel can move the unit to the site for installation.

• For location considerations, refer to Pre-installation PreparationandGuidelines.

Figure 4.6 Moving unit with piano jacks

Item D escription

1 Place piano jacks on each end of the unit.

2 Use padding between unit and straps and, with the unit secured to the piano jacks, move the forklift away from the unit.

4 Equipment Inspection and Handling 29

4.4 Placing the Unit on a Floor Stand

Refer to the floor-stand installation sheet, located inside the floor-stand package. Lower the unit onto the floor stand. Refer to Figure 4.7 below. Be sure to align the welded tabs on top of the floor stand with the inside of the unit frame base.

NOTE: The floor stand for the units equipped with EC fans is not symmetrical. Its orientation to the unit is critical for lowering the EC fans. Unless the floor stand is installed in the correct position, the fans will not lower into the floor stand.

Figure 4.7 Welded tabs on floor stand

30

Item D escription

1 Front of unit

Vertiv | Liebert® DSE™ Installer/UserGuide

5 PIPING AND REFRIGERANT REQUIREMENTS

All fluid and refrigeration connections to the unit, with the exception of the condensate drain, 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).

• A water-supply line to the optional humidifier (if applicable).

• Refrigerant piping connections between the evaporator unit, the condensing unit, and the optional economizer unit. See Refrigerant Piping and Charging on page35.

The pipe connection locations, piping general arrangement and schematics are described in the submittal documents included in the Submittal Drawings on page93.

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

Table 5.1 Piping General-arrangment Drawings

Document Number Title

DPN002615 Piping Schematic, DA050, DA080 and DA085 with MC Condenser

DPN002340 Piping Schematic, DA125, DA150 andDA165 with MC Condenser

DPN004476 PipingSchematic, DA125, DA150 and DA165 with MCV Condenser

Liebert® MCCondenser and EconoPhase Pump Locations

DPN003994 Considerations for mounting MC Condenser/EconoPhase Above or at Same Levelas DSE

DPN003552 Typical arrangement for single-circuit system

DPN002324 Typical arrangement for dual-circuit system

Table 5.2 Piping Connection Drawings

Document Number Title

Downflow Units

DPN003531 Connection Locations, DA050

DPN004080 Connection Locations, DA080 andDA085

DPN002312 Connection Locations, DA125

DPN004037 Connection Locations, DA150 andDA165

Upflow Units

DPN002951 Connection Locations, DA080U and DA085U

5 Piping andRefrigerant Requirements 31

5.1 Drain and Humidifier 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.

5.1.1 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.

This line may contain boiling water. Use copper or other material that is rated for handling boiling water for the drain line. Sagging condensate drain lines may inadvertently create an external trap.

A 3/4-in. NPT-Female drain connection is provided on DA050 to DA085 units without an optional condensate pump. A 1-1/8in. NPT-Female drain connection is provided on DA125 to DA165 units without an optional condensate pump.

Observe the following requirements and refer to Figure 5.1 on the facing page, 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.

• Use copper or other material suitable for draining water that can reach temperatures up to 212°F (100°C).

• The drain line must comply with all applicable codes.

• On units with the optional, factory-installed condensate pump, see Factory-installed

Condensate Pump on page34 and Condensate-pump Drain Line Requirements on page34.

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Vertiv | Liebert® DSE™ Installer/UserGuide

Figure 5.1 Correct and Incorrect gravity drains for downflow and upflow units

Table 5.3 Gravity-fed Drain Line Figure Descriptions

Item D escription

1 For downflow units

2 For upflow units

3 Correct drain installation

4 Incorrect draininstallation

5 Internaldrain

6 External drain

7 Continuous downward slope

8 External trap. Do not trapexternally.

9 External traps, although unintentional. Lines must be rigid enough not to bow over top ofother objects.

10 Internaldrain

11 DSE unit

5 Piping andRefrigerant Requirements 33

5.1.2 Condensate-pump 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.

This line may contain boiling water. Use copper or other material that is rated for handling boiling water for the drain line. 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 located so it will not be exposed to freezing temperatures.

• Size the piping based on the available condensate head.

• 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.

• Use copper or other material suitable for draining water that can reach temperatures up to 212°F (100°C).

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

Factory-installed Condensate Pump

If your unit includes an optional condensate pump, the pump is factory-installed inside the unit and a 1/2-in. copper sweat connection is provided on the unit.

• On 60-Hz units, the condensate pump is rated for approximately 400gphat 10ft (1514l/mat3m) total head.

• On 50-Hz units, the condensate pump is rated for approximately 315gphat 10ft (1192l/m at 3m) total head.

5.1.3 Water Supply-line Requirements for the Optional Humidifier

The unit may have an optional humidifier. Refer to the appropriate supply-line piping requirements if a humidifier is included on your unit:

Infrared Humidifier:

• 1/4-in. supply line, maximum water pressure is 150 psi (1034kPa).

• Size supply line for 1 gpm (3.8 l/m), with a minimum water pressure of 20psi(138kPa).

• Do not supply de-ionized water to the humidifier.

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Vertiv | Liebert® DSE™ Installer/UserGuide

5.2 Refrigerant Piping and Charging

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. 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.”

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).

Consult local building and plumbing codes for installation requirements of additional pressure-relief devices when isolation valves are field installed. Do not isolate any refrigerant circuits from overpressurization protection.

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.

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 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.

5.2.1 Refrigerant Piping Guidelines forAir-cooledSystems

• Air-cooled units ship with a nitrogen holding charge. Do not vent the evaporator until all refrigerant piping is in place, ready for connection to the unit and condenser.

• Use copper piping with a brazing alloy with a minimum temperature of 1350°F (732°C), such as Sil-Fos. Avoid soft solders, such as 50/50 or 95/5.

• Use a flow of dry nitrogen through the piping during brazing to prevent formation of copper oxide scale inside the piping. When copper is heated in the presence of air, copper oxide forms. POE oils will dissolve these oxides from inside the copper pipes and deposit them throughout the system, clogging filter driers and affecting other system components.

5 Piping andRefrigerant Requirements 35

• A pure dry nitrogen flow of 1-3 ft3/min (0.5-1.5 l/s) inside the pipe during brazing is sufficient to displace the air. Control the flow using a suitable measuring device.

• Ensure that the tubing surfaces to be brazed are clean and that all burrs have been removed from the ends of the tubes.

• Ensure that all loose material has been cleaned from inside the tubing before brazing.

• Protect all refrigerant line components within 18in. (460mm) of the brazing site by wrapping them with a wet cloth or with a suitable heat-sink compound.

• Isolate piping from building using vibration-isolating supports.

• Condensers with receivers cannot be installed below the evaporator. The maximum height of the condenser above the evaporator is 60ft (18.3m). Consult the factory before installing units, condensers, and receivers outside these parameters.

• Consult factory if piping run exceeds 300ft (91m) actual length or 450ft(137.2m) equivalent length.

• Install traps on hot-gas (discharge) lines at the base of vertical risers over 5ft(1.5m) and every 20ft(6m) for vertical rises over 25 ft (7.6m), then install a trap in 20-ft (6-m) increments or evenly-divided over the vertical rise.

• Pitch horizontal hot-gas piping down at a minimum rate of 1/2in.per 10ft (42mm per 10m) so that gravity will aid in moving oil in the direction of refrigerant/oil flow.

• Keep piping clean and dry, especially on units with R-410A refrigerant.

• Avoid piping runs through noise-sensitive areas.

• Do not run piping directly in front of discharge air stream.

• Refrigerant oil – do not mix oil types (see Compressor Oil on page70).

Refer to ASHRAE Refrigeration Handbook for general, good-practice refrigeration piping. The indoor cooling unit has a factory-installed high-pressure safety switch in the high side refrigerant circuit. A fusible plug kit is installed in each Liebert® DSE receiver.

NOTE: All indoor and outdoor field refrigerant piping must be insulated 1/2 in. minimum. All outdoor insulation must be UV and ozone resistant.

• Refer to Refrigerant Line Sizes and Equivalent Lengths below, for recommended refrigerant piping sizes based on equivalent pipe lengths.

• Refer to Refrigerant Charge Requirements for Air-cooled Systems on the facing page, for the refrigerant-charge requirements of the system.

• Refer to Charging Air-cooled Systems on page41, for charging information.

5.2.2 Refrigerant Line Sizes and Equivalent Lengths

Table 5.4 Recommended Refrigerant Line Sizes, OD Copper

Model DA050 DA080 and DA085 DA125 DA150 and DA165

Equivalent

Length

50 ft (15 m) 1-1/8 7/8 1-1/8 7/8 1-3/8 7/8 1-3/8 7/8

100 ft (30 m) 1-1/8 7/8 1-1/8 7/8 1-3/8 7/8 1-3/8 1-1/8

150 ft (45 m) 1-1/8 7/8 1-1/8 7/8 1-3/8 7/8 1-3/8 1-1/8

300 ft (91m) 1-1/8 7/8 1-1/8 7/8 1-3/8 7/8 1-3/8 1-1/8

450 ft (137 m)* 1-1/8 7/8 1-1/8 7/8 1-3/8 7/8 1-3/8 1-1/8

*Consult factory when actualpipe length between condenser/EconoPhase andLiebert DSE unit willexceed 300 ft (91 m).

Source: DPN000788. Rev. 11

Hot Gas

Line, in.

Liquid

Line, in.

Hot Gas

Line, in.

Liquid

Line, in.

Hot Gas

Line, in.

Liquid

Line, in.

Hot Gas

Line, in.

Liquid

Line, in.

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NOTE: Install a 1-3/8-in. liquid line between the condenser and the Liebert EconoPhase™ unit, regardless of line sizes indicated in Table 5.4 on the previous page. See the piping schematics for your system in Submittal Drawings on page93. For installations using pre-fabricated heat-rejection skids, included piping must be factored into total equivalent length calculation. Please consult factory for details.

5.2.3 Refrigerant Charge Requirements for Air-cooled Systems

The following tables provide the refrigerant charge requirements for the Liebert® DSE, connected piping, and condenser options.

Table 5.5 Indoor Unit Approximate Refrigerant Charge for R-410A Per Circuit

System Type Model Outer Circuit, lb(kg) Inner C ircuit, lb(kg)

DA050 11 (5) NA

DA080 16(7.3) 14 (6.4)

Air-cooled

*System Charge = indoor unit +condenser + refrigerant receiver + refrigerant lines. For system charges over 200 lb. (90.7kg), consult your Vertiv representative.

See Table 10.3 on page70 for the recommended oilfor the system.

Source:DPN003950 Rev. 3

DA085 18 (8.2) 16(7.3)

DA125 28 (12.7) 25 (11.3)

DA150 28 (12.7) 25 (11.3)

DA165 28 (12.7) 25 (11.3)

Table 5.6 Condenser Refrigerant Charge for R-410A Per Circuit Including PRE Including Receiver

Standard Condenser Model

MCM080E1 17.0 (7.7) —

MCL110E1 19.5 (8.8) —

MCL110E2 14.0 (6.4) —

MCM160E2 17.0 (7.7) 24.0 (10.9)

MCL220E2 21.0 (9.5) 28.0 (12.7)

MCL165E1 — 34.0 (15.4)

MCL220E1 — 42.5 (19.3)

Condenser charge includes receivers.

Small Receiver: 28-in. long, used on DA050, DA080 and DA085.

Large Receiver: 60-in. long, used on DA125, DA150 and DA165.

Per circuit withSmallReceiver,

lb(kg)

Per circuit with Larg eReceiver,

lb(kg)

5 Piping andRefrigerant Requirements 37

Table 5.7 Interconnecting Piping Refrigerant Charge for R-410A, lb per 100ft (kg per 30m)

Line Size, O.D., in. Liquid Line Hot Gas L ine

7/8 19.8 (9.1) 2.3 (1.0)

1-1/8 33.8 (15.5) 3.9 (1.8)

1-3/8 51.5 (23.5) 5.9 (2.7)

Source: DPN003099, Rev. 1

Table 5.8 Liebert Pump Module Refrigerant Charge forR-410APer Circuit

System Type Model Charge per Circuit, lb(kg)

PR125

Liebert® EconoPhase™ Pumping Unit

PR085

PR050

5.4 (2.5)

5.2.4 Additional Oil Requirements forScrollandDigital-scrollCompressors

NOTICE

Risk of improper compressor lubrication. Can cause compressor and refrigerant system damage.

Failure to use oil types, viscosities and quantities recommended by the compressor manufacturer may reduce compressor life and void the compressor warranty. See Table 10.3 on page70 for the recommended oil for the system.

• Do not mix polyolester (POE) and mineral-based oils.

• Do not mix oils of different viscosities.

• Consult your local sales representative, Vertiv product support at 1-800-543-2778, or the compressor manufacturer if questions arise.

See Table 5.9 on the facing page, for the amount required for various system charge levels.

In addition to oil added based on system charge, additional oil is required for discharge-line field-installed traps. Standard-formed tube traps are required, see Figure 5.2 on the facing page and Table 5.10 on page40, because straight tubes and fittings used as traps require much more oil and the length of the straight tube can vary.

After the system has been fully charged with refrigerant, use a hand pump to add the additional oil at the suction side of the system while the system is running.

The amount of oil added by field service must be recorded on the tag marked “Oil Added Field Service Record,” attached to each compressor. The date of oil addition must be included as well.

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Figure 5.2 Standard-formed Tube Trap Versus Straight-tubes-and-fittings Trap

Item D escription

1 Standard-formed tube trap

2 Straight tubes and fittings trap

Table 5.9 Additional Oil Required per Refrigerant Charge

Model

Refrigerant System Charge

Per Circuit, lb (kg)*

DA050 DA080 DA085 DA125 DA150 DA 165

Additional Oil Required Per Circuit, oz (ml)

< 40 (18.1) 0 0 0 0 0 0

40 (18.1) 5 (150) 5 (150) 5 (150) 0 10 (300) 10 (300)

50 (22.7) 9(270) 9 (270) 9 (270) 4 (120) 18 (530) 18 (530)

60 (27.2) 13 (380) 13 (380) 13 (380) 8 (240) 26 (770) 26 (770)

70 (31.8) 17 (500) 17 (500) 17 (500) 11 (330) 34 (1010) 34 (1010)

80 (36.3) 21 (620) 21 (620) 21 (620) 14 (410) 42 (1240) 42 (1240)

90 (40.8) 25 (740) 25 (740) 25 (740) 17 (500) 50 (1480) 50 (1480)

100 (45.4) 29 (860) 29 (860) 29 (860) 20 (590) 58 (1720) 58 (1720)

110 (49.9) 33 (980) 33 (980) 33 (980) 23 (680) 66 (1950) 66 (1950)

120 (54.4) 37 (1090) 37 (1090) 37 (1090) 26 (770) 74 (2190) 74 (2190)

130 (59.0) 41 (1210) 41(1210) 41 (1210) 29 (860) 82 (2430) 82 (2430)

140 (63.5) 45 (1330) 45 (1330) 45 (1330) 32 (950) 90 (2660) 90 (2660)

150 (68.0) 49(1450) 49 (1450) 49 (1450) 36 (1060) 98 (2900) 98 (2900)

160 (72.6) 53 (1570) 53 (1570) 53 (1570) 40 (1180) 106 (3130) 106 (3130)

5 Piping andRefrigerant Requirements 39

Table 5.9 Additional Oil Required per Refrigerant Charge (continued)

Model

Refrigerant System Charge

Per Circuit, lb (kg)*

170 (77.1) 57(1690) 57 (1690) 57 (1690) 43 (1270) 114 (3370) 114 (3370)

180 (81.6) 61 (1800) 61 (1800) 61 (1800) 46 (1360) 122 (3610) 122 (3610)

190 (86.2) 65 (1920) 65 (1920) 65 (1920) 49 (1450) 130 (3840) 130 (3840)

200 (90.7) 69 (2040) 69 (2040) 69 (2040) 52 (1540) 138 (4080) 138 (4080)

*System Charge = indoor unit +condenser + refrigerant receiver + refrigerant lines. For system charges over 200 lb. (90.7kg), consult your Vertiv representative.

See 10.7 on page70 for the recommended oilfor the system.

Source:DPN003950 Rev. 5

DA050 DA080 DA085 DA125 DA150 DA 165

Additional Oil Required Per Circuit, oz (ml)

Table 5.10 Volume of Oil in Standard-form Trap by Pipe Diameter

Pipe diameter, in. Oilvolume, oz (ml)

1/2 0.2 (5.9)

5/8 0.4 (11.8)

3/4 0.6 (17.7)

7/8 0.9 (26.6)

1-1/8 1.8 (53.2)

1-3/8 3.3 (97.6)

1-5/8 5.5 (162.7)

Source: DPN003950, Rev. 3

5.2.5 Evacuation, Leak-testing, and Charging Air-cooled Systems withReceivers

Two discharge lines and two liquid lines (one discharge line and one liquid line for DA050 models)must be field-installed between the indoor unit and the outdoor condenser. See DPN002615 and DPN002340 in Appendix C: on page93. for additional field-installed piping needed at the condenser.

NOTE: Keep the evaporator unit, EconoPhase, and condenser closed with their factory charge of dry nitrogen while all field piping is installed. Keep the field piping clean and dry during installation. Do not allow it to stand open to the atmosphere. When all the field interconnecting piping is in place, vent each outdoor unit’s dry nitrogen charge and connect to the field piping. Finally, vent the evaporator unit's dry nitrogen charge and make its piping connection last. Follow all proper brazing practices, including a dry nitrogen purge to maintain system cleanliness. The condenser connection pipes must be wrapped with a wet cloth to keep the pressure and temperature sensors cool during any brazing.

Evacuation and Leak-testing Air-cooled Systems

For proper leak-check and evacuation, you must open all system valves and account for all check valves.

NOTE: The system includes a factory-installed check valve and an additional downstream Schrader valve with core in the compressor discharge line. Proper evacuation of the condenser side of the compressor can be accomplished only using the downstream Schrader valve. See the appropriate piping schematic for your system in Submittal Drawings on page93.

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1. Starting with Circuit #1, open the service valves and place a 150 PSIG (1034kPa) of dry nitrogen with a tracer of refrigerant. Check system for leaks with a suitable leak detector.

2. With pressure still in Circuit #1, open the compressor service valves in Circuit#2.

• If pressure increases in Circuit#2, the system is cross-circuited and must be re-checked for proper piping.

• If there is no pressure increase, repeat step1 on Circuit#2.

3. After completion of leak testing, release the test pressure, (observe local code) and pull an initial deep vacuum of 500microns on the system with a suitable pump.

4. After 4hours, check the pressure readings and, if they have not changed, break vacuum with dry nitrogen. Pull a second and third vacuum to 500 microns or less. Re-check the pressure after 2hours. When the 3 checks are complete, remove the jumper hose from the service-valve fitting and the condenser, and proceed to Charging Air-cooled Systems below.

Charging Air-cooled Systems

NOTICE

Risk of improper refrigerant charging. Can cause equipment damage.

R-410A is a blended refrigerant and must be introduced and charged from the cylinder only as a liquid.

When adding liquid refrigerant to an operating system, it may be necessary to add the refrigerant through the compressor suction service valve.service . Care must be exercised to avoid damage to the compressor. We recommend connecting a sight glass between the charging hose and the compressor suction service valve. This will permit adjustment of the cylinder hand valve so that liquid can leave the cylinder while allowing vapor to enter the compressor.

NOTICE

Risk of improper operation. Can cause compressor failure.

Operating the unit with the EEV closed can cause compressor failure. The reheat and humidifier are disabled. A minimum of 20 psig (138 kPa) must be established and maintained for the compressor to operate. The charging function can be reset as many times as required to complete

To calculate the charge for the system:

1. Check the nameplate on the indoor unit for refrigerant type to be used. Unit control configurations differ depending on refrigerant type.

2. The unit must be operating, refer to Checklist for Completed Installation on page49, the "Liebert® MC™ Installer/User Guide," and "Liebert® EconoPhase™ Installer/User Guide."

3. Calculate the amount of charge for the system. See Refrigerant Charge Requirements for

Air-cooled Systems on page37.

4. Accurately weigh in as much of the system charge as possible before starting the unit. Do not exceed the calculated charge by more than 0.5lb(0.37kg).

5. Close the Liebert® MC and Liebert® EconoPhase disconnect switches.

• We recommend charging the unit with the return-air setpoint between 75°F and 85°F (24°C and 29°C).

• The return-air temperature to the unit being charged must be stable and must be maintained greater than 65°F(18°C). If this is not possible due to lack of heat load, then the load banks must be used to offset the cooling load during start-up. See

Refrigerant-level Sight Glasses ontheReceiver on the next page.

5 Piping andRefrigerant Requirements 41

6. Close the unit disconnect switch, and operate the unit for 30 minutes using the charging function for System#1 and System#2 in the "Diagnostic" menu of the Liebert® iCOM controller.

• A minimum 20psig (138kPa) must be established and maintained for the compressor to operate.

• The charging function operates the compressor at full capacity, energizes the blower motor, and opens the EEV.

• The charging function can be reset as many times as required to complete unit charging.

7. Check the refrigerant level in the refrigerant-level sight glasses on each receiver after the unit has been operating for at least 15minutes.

NOTE: Each receiver at the condenser has 2 sight glasses and the refrigerant level varies with outside temperature.

8. Adjust the refrigerant level in each circuit to meet the level shown in Refrigerant-level Sight

Glasses ontheReceiver below.

9. After adjusting the refrigerant, allow the system to operate an additional 15minutes before checking the for the need of further adjustment.

NOTE: A digital-scroll compressor can have a clear sight glass only when operating at 100% capacity. When operating with a receiver, the sight glass might not become clear even when operating at 100% capacity. When operating below 100%, the sight glass may show bubbles with each 15-second unloading cycle.

Refrigerant-level Sight Glasses ontheReceiver

On the receiver(s) at the condenser are 2refrigerant-level sight glasses. Refrigerant level will vary with outside temperature and return-air temperature at the indoor unit. Check refrigerant level after the unit has been on for at least 15 minutes and the return-air temperature is stable between 75°F and 85°F (24°C and 29°C). Make any adjustments to the refrigerant charge to achieve the following levels.

Sight Glass Levels at Outdoor Temperatures

• 40°F (4.5°C) and lower—bottom sight glass is 3/4 full

• 40°F (4.5°C) and higher—bottom sight glass is full

If the return air temperature cannot be maintained between 75°F and 85°F (24°C and 29°C) due to lack of load, then the liquid-level receiver must be adjusted to the following if return air is between 65°F and 75°F (18°C and 24°C):

• 40°F (4.5°C) and lower—Charge to the bottom of the top sight glass.

• 40°F (4.5°C) and higher—top sight glass is 1/4 full

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6 ELECTRICAL 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 the appropriate submittal drawing, listed in Table 6.1 on the next page, 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 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 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.

6 Electrical Connections 43

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.

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

The electrical and unit-to-unit connections are described in the submittal documents included in the

Submittal Drawings on page93.

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

Table 6.1 Electrical Field-connection Drawings

Document Number Title

DPN004387 ElectricalField Connec tions, Upflow &Downflow, DA050, DA080, and DA085 Models

DPN004388 Electrical Field Connections, Downflow Models, DA125, DA150, and DA165

DPN003284

DPN002361

Unit-to-Unit Networking

DPN004351 Liebert® iCOM Unit-to-unit Network Connections

CANbus cable connections between indoor unit, 1 Liebert® MCcondenser andoptional Liebert® EconoPhase pump

CANbus cable connections between indoor unit, 2 Liebert® MCcondensers and optional Liebert® EconoPhase pump

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7 EC FANS AND PLENUMS

Depending on the air-distribution options of your unit, you may have EC fans and/or plenums to install.

7.1 Downflow Units with EC Fans

DSE downflow models are equipped with EC fans that may operate in the fully-raised position or lowered into the floor stand for increased efficiency from reduced air resistance.

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.

CAUTION: Risk of improper handling of 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, OSHA-approved PPE should attempt to remove or install cabinet panels.

NOTE: Use fans either in their original raised position or with the fans in their fully-lowered position. Suspension of fans in an intermediate position will directly affect product performance and is not recommended.

7.1.1 Lowering the EC Fans into the Floor Stand on Downflow Models

Tools Needed

• 1/2-in. hex socket and wrench

• Factory-supplied jack, crank and jack support

• Cable tie cutter

To lower the fans:

1. Remove the middle and bottom panels from the front of the unit.

2. For ease of fan lowering, We recommend removing the infrared humidifier.

3. Position the factory-supplied jack and jack support under the fan to be lowered.

4. Raise the jack to safely support the fan before removing any hardware.

NOTE: The jack should be centered between the first and second set of tabs on the jack support (see Detail A in Figure 7.1 on the next page).

7 EC Fansand Plenums 45

5. Cut and remove the cable tie that holds the wiring loop to the blower mounting plate. All other cable ties that route the fan wiring should remain intact.

6. Remove the six 1/2” hex head screws. Retain the hardware for later use.

Figure 7.1 Lowering EC fans into floor stand, steps 1 through 6

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7. Using the jack, lower the fan module slowly until it rests on the frame of the unit.

NOTICE

Risk of equipment snagging cables and wiring. Can damage the unit wiring and components.

Carefully monitor the position of the EC-fan wire harnesses and other parts while lowering the fan to be sure that they are not caught or pinched.

8. Secure the fan module in the fully lowered position by reinstalling the hex head screws directly to the frame. Screw clearance holes are provided in the fan module.

NOTE: Not all hardware retained will be used to secure the fans in the lowered positioned.

9. Repeat steps 3 through 8 to lower remaining fan modules.

Figure 7.2 Lowering EC fans into floor, steps 7 through 8

7.2 Downflow Units with Filter Plenums andUpflow-unitPlenumswithECFans

7.2.1 Downflow Unit Filter Plenums

Filter plenums are installed on DSE downflow models DA125, DA150, and DA165 and are required for operation. Read all instructions before installing plenums.

7 EC Fansand Plenums 47

7.2.2 Upflow Unit Plenums with EC Fans

EC fans on upflow units are mounted external to the unit in a factory-provided plenum. The plenum distributes air to the conditioned space through adjustable, double-deflection grilles, or connects with field-supplied ductwork. Read all instructions before installing plenums and EC fans.

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8 CHECKLIST FOR COMPLETED INSTALLATION

8.1 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. If equipment has been disassembled for installation, unit must be reassembled per instructions.

8.2 Electrical Installation Checks

1. Supply voltage and phase matches equipment nameplate.

2. Power wiring connections completed to the disconnect switch, evaporator unit and heat rejection equipment.

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

4. Control wiring connections completed between indoor evaporator and heat-rejection equipment.

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

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

7. Control transformer setting matches incoming power.

8. Electrical service conforms to national and local codes.

9. Check blowers and compressors for proper rotation.

8.3 Piping Installation Checks

1. Piping completed to refrigerant loop.

2. Piping has been leak-checked, evacuated and charged.

3. Additional oil has been added for system charges over 40 pounds (18.1kg) per circuit. See

Additional Oil Requirements forScrollandDigital-scrollCompressors on page38.

4. Piping is properly sized, sloped and trapped as shown in the piping schematics.

5. Check piping inside and outside of equipment for proper support and adequate spacing to prevent rub-through.

6. Ensure that factory clamps have been reinstalled.

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

8. Water supply line connected to humidifier and not leaking.

9. Liebert® EconoPhase™ pumping unit has been correctly piped into the liquid line.

8.4 Other Installation Checks

1. Ducting or plenum assembly complete (if required), maintain access to filters.

2. On units with filter plenums, make sure filter-clog tubing is installed.

3. Filters installed.

4. Check fasteners that secure , reheats, humidifier and motors—some may have become loose during shipment.

5. Verify water detection is properly installed around all units (recommended).

6. Blower drive system rotates freely.

7. All fans are free of debris.

8. Remove rubber band from float in optional infrared humidifier.

9. Seal openings around piping and electrical connections.

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

11. Locate blank start-up sheet, ready for completion by installer or start-up technician.

8 Checklist for Completed Installation 49

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9 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 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 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

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.

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.

9 Initial Start-up Checks andCommissioningProcedure forWarrantyInspection 51

• Confirm that all items on Checklist for Completed Installation on page49 have been done.

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

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

• Forward the completed “Liebert® DSE 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.

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10 MAINTENANCE

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 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.

The Liebert® DSE is a single component in the facility heat-removal system. The system includes air distribution (raised floors, duct systems), outdoor heat rejection (condensers, pumps) and indoor cooling and humidity loads (equipment load, location, outside air infiltration). Proper application and maintenance of the entire system is critical to the life and reliability of the thermal-management units.

• Good maintenance practices are essential to minimizing operation costs and maximizing product life.

• Read and follow monthly and semi-annual maintenance schedules included in this manual. These MINIMUM maintenance intervals may need to be more frequent based on site-specific conditions.

• See the Liebert®iCOM™ user manual, SL-31075, for instructions on using the controller to predict some service maintenance intervals.

• We recommend the use of trained and authorized service personnel, extended service contracts and factory-specified replacement parts. Contact your Vertiv sales representative.

10 Maintenance 53

10.1 Filters

NOTICE

Risk of improper filter installation. Can cause filter collapse and airflow reduction.

Pleat direction is non-standard. Use only short-pleat filters (see Figure 10.2 on the facing page). Long-pleat filters are subject to collapse at high airflows.

To maximize the performance and reliability of the equipment, use only Vertiv filters. Contact your Vertiv representative to order replacement filters.

Verify that filters are installed and positioned so the air-flow direction marked on the filter is the same direction as unit air flow.

Table 10.1 Filter Quantities

Number of Filters

Unit S ize Filter Size, WidthxLength

25 x 16 1 1/1

DA050

25 x 20 2 2/2

DA080/085Downflow 25 x 20 4 4/4

DA080/085 Upflow 25 x20 6 6/6

DA125/150 21.5 x 24 10 10/10

DA165 2 1.5 x 24 10 10/10

4in. Filter Op tion,

MERV8, MERV11 or MERV13

2-in. Primary/2-in. Pre-filter option, Merv11 Primary/MERV8 Pre-filter

or MerV 13 Primary/MERV8 Pre-Filter

10.1.1 Filter-replacement for Downflow Units

1. Disconnect power from the unit.

2. Open the front access panel, locate the filter above the electric panel, and slide the filter out the front of the unit.

3. Replace with new filter—install the filter in the proper direction of the airflow.

4. Test the operation of the filter clog switch. The unit panels must be in place and closed to find this point.

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5. Start the blower and turn the switch counterclockwise until the alarm is energized.

6. Turn the adjusting knob one turn clockwise or to the desired filter change point.

Figure 10.1 Proper filter pleat direction

Item Description

1 Short pleat construction

2 Long pleat construction

10.1.2 Filter-replacement for Upflow Units

1. Disconnect power from the unit.

2. Open the front access panel and remove the filter(s).

• For upflow front return units, remove the lower front access panels, lift filters to the top of the filter rack and tilt forward for removal.

• For upflow rear return units, remove filters using filter access door in rear return filter box.

3. Replace with new filter—install the filters in the proper direction of the airflow. The proper direction is marked on the filter.

4. Test the operation of the filter clog switch. The unit panels must be in place and closed to find this point.

5. Start the blower and turn the switch counterclockwise until the alarm is energized.

6. Turn the adjusting knob one turn clockwise or to the desired filter change point.

Figure 10.2 Proper filter pleat direction

10 Maintenance 55

Item D escription

1 Short pleat construction

2 Long pleat construction

10.2 Blower Drive System—EC Fans

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.

CAUTION: Risk of contact with hot surfaces. Can cause burn injury. The EC fans, electronics housing, humidifier pan and water contained within 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 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.

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.

NOTICE

Risk of improper installation. Can cause equipment damage.

Only a properly trained and qualified technician should install or open this motor.

Use 60/75°C Class 1 copper wire only.

10.2.1 Protective Features

Monitoring functions protect the motor against overtemperature of electronics, overtemperature of motor and incorrect rotor position detection. With any of these failures, an alarm will display through the Liebert® iCOM controller and the motor stops electronically. There is no automatic restart. The power must be switched off for a minimum of 20 seconds once the motor is at a standstill.

The motor also provides locked rotor protection, undervoltage/phase failure detection and motor current limitation. These conditions will display an alarm through the Liebert® iCOM.

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10.2.2 Fan Impellers and Bearings Maintenance

Fan impellers should be periodically inspected and any debris removed. Check to ensure that the impellers can rotate freely and that the fan guards are still properly mounted for sufficient protection against accidentally contacting the impeller. Bearings used on the units are maintenance-free. Consult the factory for more information.

10.2.3 Fan Assembly Troubleshooting

Any safety hazards stemming from the device must be re-evaluated once it is installed in the end device.

Do not make any modifications, additions or conversions to the fan assembly without the approval of Vertiv.

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 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.

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.

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.

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.

NOTE: Do not assume that the fan blades will not start to spin. If the motor is in a fault condition, it will safely shut down. Once the fault condition is cleared, there are certain conditions in which the motor will automatically resume operation.

NOTE: Further troubleshooting procedures relating to fan connection/operation in the thermal management unit are included in Blower troubleshooting.

10 Maintenance 57

EC-fan Fault Conditions

Table 10.2 EC-fan Fault Conditions

Fault Condition Reset Trigger Description

Phase Failure Automatic

Locked/Blocked Rotor

Hall Effect Sensor Error

Motor Over Temperature

Electronics Over Temperature

Line Under-Voltage

Automatic

Manual (Mains/Software)

Automatic

EC-fan High-voltage Tests

1. Check Fuses. If fuses are okay, perform the following:

• Check all connections.

• Make sure connections are on the wire strand and not on the wire insulation.

• Cycle Power. Disconnect mains voltage to power down the motor and then re-apply power.

• Check mains voltage at each phase (phase to ground) at the KL1 connector. Confirm phase failure not present.

• Check that the voltage is within the acceptable voltage range at the KL1 connector. Confirm line under-voltage is not present.

2. Check Fuses. If fuses are blown, perform the following:

• Check resistances across the phases at the KL1 connector and note them in the following table..

One phase is missing. In thiscase the motor willcome to astop andthen automaticallyrestart when all phases are present.

The rotor is blocked. Once the locking mechanism has been removed, the motor will automaticallyrestart.

The HallEffect Sensor is used to monitor fan speed. If there is a hall sensor communication failure with the electronics, the motor will stop. In this case there hasto be amanual restart (either with the mains power or software).

The motor willstop in the event there is a motor over temperature condition. In this case there has to be a manualrestart (either with the mains power or software).

The motor willstop in the event there is an electronics over temperature condition. In this case there has to be amanual restart (either with the mains power or software).

Once the line voltage returns within permitted operatingrange, the fan will automatically restart.

NOTE: Power wires must be removed from the motor for resistance test.

• Resistances should be similar for all 3 readings.

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L1 - L2 Ohm

L2 - L3 Ohm

L1 - L3 Ohm

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• Resistance readings should be greater than 2Ohm.

• Check all connections. Make sure connections are on the wire strand and not on the wire insulation.

• Replace Fuses.

• Check mains voltage at each phase (phase to ground) at the KL1 connector. Confirms phase failure not present.

• Check that the voltage is within the acceptable voltage range at the KL1 connector. Confirmsline under-voltage is not present.

EC-fan Low-voltage Tests

• Check control input at the KL3 connector (Ain1U to GND). Confirm that there is a control voltage present at the KL3 connector.

NOTE: Use the GND in the KL3 connector. Do not connect the control ground to the PE in KL1!

• Check +10 V output on KL3 connector (between +10 V and GND).

10 Maintenance 59

EC-fan Alarm Contact Tests

Check the alarm contact at KL2 to determine if there are any fault conditions present.

Condition No Fault C ondition Fault C ondition

NO - COM Open Closed

NC - COM Closed Open

NOTE: The table refers to conditions while the motor is actively energized. When the motor is deenergized, it will be in a fault condition.

• Check EC Control to determine the fault condition.

10.2.4 Removing EC Fans from Downflow Units

The EC fans in Liebert® DSE units can be removed for easier maintenance or for replacement.

WARNING! Risk of electric shock and contact with high speed rotating fan blades! Can cause injury or death! Open all local and remote electric power supply disconnect switches, verify with a voltmeter that power is off, and verify that fan blades have stopped rotating before working within the unit cabinet.

WARNING! Risk of extremely heavy fan modules dropping downward suddenly. Can cause injury or death. Fan modules weigh in excess of 125-lb (56.7-kg) each. Support fan modules before removing mounting hardware. Use caution to keep body parts out of fan module pathway of movement during removal. Only properly trained and qualified personnel should work on this equipment.

Read these instructions and unit labeling before repositioning fan modules. The instructions show aLiebert®DSE with a 24-in. floor stand. Your unit may look slightly different.

Hardware and Tools Required

• 1/2” hex socket and wrench

• Factory-supplied jack, crank and jack support

• Cable tie cutter

• Field-supplied fan removal device capable of supporting fan assembly weight

To remove an EC fan module:

1. Remove panels from the front of the unit.

2. Remove the humidifier pan. You can remove fans without removing the humidifier pan, but removing it makes fan removal easier, see Figure 10.3 on the facing page.

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Figure 10.3 Humidifier pan removal

Item Description

1 Humidifier pan

3. If the fan module is raised and in the unit, proceed to step 6. – or –

If the fan module is lowered into the floor stand, refer to Figure 10.4 below and before removing any hardware, center the factory-supplied jack between the tabs on the jack support.

Figure 10.4 Jack placement to support EC fan module

Item Description

1 Position jack to support fan

2 Tabs

10 Maintenance 61

4. Remove hardware, Figure 10.5 below, that retains the fan in the lowered position, and save it forre-installation.

NOTE: Hardware quantity and location varies depending on the type of unit.

Figure 10.5 Hardware removal

Item D escription

1 1/2-in. (13-mm) Hex-headbolts (typicalboth sides)

2 Fan deck

3 Wiring loop

5. Use the jack to raise the fan module slowly until the fan motor clears the front frame channel.

6. Insert a field-supplied fan-removal device securely on the front and rear frame channels under the fan module as shown in Figure 10.6 on the facing page.

• A suitable fan-removal device is two lengths of rigid material that is 4 inches (100mm) wide and strong enough to support the weight of the fan module.

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7. Disconnect high-voltage and low-voltage fan-motor wiring from the fan-motor electric component inside the electric panel. Cut cable ties as needed.

8. Using the removal device shown inserted in Figure 10.6 below, slide the fan module out through the front of the unit.

9. To reinstall the fan module, reverse these steps. Remove the field-supplied fan-removal device before resuming operation.

NOTE: Refer to the unit's electrical schematic for specific wire-attachment points.

Figure 10.6 Slide EC fans out of the unit

Item D escription

1 Rear frame channel (right-sidepanel not shown)

2 Front channel

3 Fan-removaldevices

10.2.5 Removing EC Fans from Upflow Units

WARNING! Risk of electrical shock. Can cause serious injury or death. Open all local and remote electric power disconnect switches and verify that power is off with a voltmeter before working within the electric connection enclosures.

WARNING! Risk of extremely heavy fan modules dropping downward suddenly. Can cause injury or death. Fan modules weigh in excess of 125-lb (56.7-kg) each. Support fan modules before removing mounting hardware. Use caution to keep body parts out of fan module pathway of movement during removal. Only properly trained and qualified personnel should work on this equipment. More than one person may be required to complete the assembly and installation. Installer(s) must be properly trained and qualified to lift, move and manipulate very heavy equipment from floor level to the top of the unit. Wear appropriate, OSHA-approved PPE when moving, lifting, installing, and removing the fan (s) and plenum. Read and follow the lifting equipment and/or ladder manufacturer's operating instructions and safety requirements.

10 Maintenance 63

NOTE: We recommend using a duct lift or scissors lift when installing or removing the EC-fan assemblies on top of the unit.

1. Disconnect the black-sleeved low-voltage harness and the green-sleeved high-voltage harness from the junction box, Figure 10.7 below.

Figure 10.7 EC-fan junction boxes

Item D escription

1 Junction box between fans 1and 2 on2-and3-fan unit

2 Junction box for 1- or 3-fan unit

2. Locate the 6 places where the EC-fan assembly attaches to the unit, Figure 10.8 below, and remove the bolts, washers and spacers, Figure 10.9 on the facing page.

Figure 10.8 Assembly in place on the unit

Item Description

1 Mounting holes

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Figure 10.9 Bolts, washers and spacers on EC-fan assembly (6 places)

Item Description

1 Bolt

2 Washer

3 Spacer

10 Maintenance 65

3. Position the lifting device so that it lines-up with the EC-fan assembly.

NOTE: A minimum clearance of 36 in. (914mm) from the bottom of the unit to the topof the plenum is required for component access.

4. Using the handles on the EC-fan assembly, carefully lift the assembly over the hinge along the top of the unit, and slide the assembly onto the lifting device, Figure 10.10 below.

5. Use the lifting device to lower the EC-fan assembly for transport to service or maintenance area.

Figure 10.10 EC-fan assembly moved onto lifting device

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10.3 Infrared Humidifier Maintenance

During normal humidifier operation, deposits of mineral solids will collect in humidifier pan and on the float switch. These must be cleaned periodically to ensure proper operation. Frequency of cleaning must be locally established since it is dependent on humidifier usage and local water quality. A spare pan is recommended to reduce maintenance time at unit. The Liebert® autoflush system can greatly increase the time between cleanings, but does not eliminate the need for periodic checks and maintenance (see Liebert® iCOM™ user manual SL-31075 for autoflush setup). To help reduce excessive scaling in locations with difficult water quality, the use of Vapure™ is recommended (contact your local sales representative).

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.

10.3.1 Cleaning Humidifier Pan and Float Switch

Before turning the unit Off:

1. With unit operating, remove call for humidification at the Liebert® iCOM control.

2. Let the blower operate 5 minutes to allow the humidifier and water to cool.

3. If unit has a condensate pump, turn unit OFF at Liebert® iCOM control.

4. Pull out the humidifier standpipe in pan.

5. Inspect the O-ring (replace if necessary).

6. Let the pan drain and condensate pump operate (if applicable).

7. Disconnect power from the unit.

8. Disconnect the drain coupling from the bottom of the pan.

9. Remove the thermostat from the bottom of the pan and the retaining screws from the sides of the pan.

10. Slide the pan out.

11. Loosen scale on side and bottom of pan with a stiff nylon brush or plastic scraper.

12. Flush with water.

13. Carefully clean scale off float switch (make sure to reinstall correctly (see Figure 10.11 on the next page).

14. Reinstall the pan, thermostat, standpipe, drain coupling and screws into the humidifier.

15. Operate the humidifier and check for leaks.

10 Maintenance 67

Figure 10.11 Correct float switch orientation

Item D escription

1 Correct switch orientation

2 Incorrect switch orientation

10.3.2 Changing Humidifier Lamps

NOTE: Touching quartz lamps with bare hands will severely shorten bulb life. Skin oils create hot spots on lamp surface. Wear clean cotton gloves when handling lamps.

The lamps are shown in Figure 10.12 on the facing page.

1. Remove humidifier pan (see Cleaning Humidifier Pan and Float Switch on the previous page, steps 1 through 10).

2. Disconnect power from unit.

3. At humidifier, remove screws and cover from high-voltage compartment.

4. Disconnect one end of purple jumper wires.

5. Using a continuity meter, locate burned out lamp.

6. Remove lamp brackets under lamps.

7. Loosen two screws securing lamp lead wires to junction block.

8. Pull bulb straight down and discard.

9. Wrap lead wires once around new lamp’s metal ends. This will support lamp and allow for thermal expansion. Insert lead wires into junction block and torque screws to 30 in-lb.

10. Reassemble by reversing steps 1 through 9.

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Figure 10.12 Infrared humidifier lamps

Item D escription

1 Infrared bulbs

10.4 Condensate-drain and Condensate-pump System Maintenance

10.4.1 Condensate Drain

Check for and clear obstructions in tubing during routine maintenance.

10.4.2 Condensate Pump

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.

To maintain the condensate pump:

1. Disconnect power to the unit using the disconnect switch.

2. Check for and clear obstructions in gravity lines leading to the condensate pump.

3. Remove the sump, clean with a stiff nylon brush and flush with water.

4. Inspect and clear clogs in the discharge check valve and float mechanism.

5. Reassemble and check for leaks.

10.5 Electric Reheat Maintenance

• Inspect and clean reheat elements.

• Inspect and tighten support hardware.

10 Maintenance 69

10.6 Electronic Expansion Valve (EEV) Maintenance

The EEV controls superheat through the Liebert® iCOM™ controls by actively measuring suction pressure via a transducer attached to the suction-line rotalock and suction temperature via a thermister strapped to the suction line. The EEV actively adjusts the orifice size and resulting mass flow of refrigerant to maintain the superheat setpoint (set in Liebert® iCOM). The EEV is used in place of the standard thermal expansion valve (TXV).

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.

NOTE: Intermittent loss of subcooling may result in EEV/superheat instability. If superheat instability is observed, check for proper refrigerant level in receiver (see Refrigerant Piping Guidelines

forAir-cooledSystems on page35 for the proper charge level). If proper charge is observed in receiver,

and superheat remains unstable, then increase superheat setting in the Liebert® iCOM to 15°F (8.49°C).

10.7 Compressor Maintenance

10.7.1 Compressor Oil

NOTICE

Risk of improper compressor lubrication. Can cause compressor and refrigerant system damage.

Failure to use oil types, viscosities and quantities recommended by the compressor manufacturer may reduce compressor life and void the compressor warranty.

See oil types specified in Table 10.3 below.

• Do not mix polyolester (POE) and mineral-based oils.

• Do not mix oils of different viscosities.

• Consult Vertiv technical support or the compressor manufacturer if questions arise.

Table 10.3 Compressor oil types for R-410A Refrigerant

Compressor Type Oil Type

CopelandScroll and Digital Scroll POE Oil- ISO 32 Centistoke Viscosity

1. Use Copeland POE OilULTRA 32-3MAF or other Copeland-approved oils.

Source: DPN003950. Rev.5

1

NOTE: See Additional Oil Requirements forScrollandDigital-scrollCompressors on page38 for additional oil based on the system's refrigerant charge.

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10.7.2 Rotalock Valve

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.

• The Neutral port remains open to the compressor side in all positions of the valve stem, Figure

10.13 below. A high-pressure cut-out switch or low-pressure switch/transducer will be connected to this port.

• The Service port is closed to the system when valve stem is back-seated, Figure 10.13 below. It is open to the system as soon as the valve is adjusted away from the back-seated position.

Figure 10.13 Rotalock valve

Item D escription Item D escription

1 Service port (gauge) 4 Compressor side ofvalve

2 Front seat 5 Neutralport

3 Back seat 6 System side of valve

10.7.3 Replacement Compressors

Replacement compressors are available through your Vertiv sales office. If the unit is under warranty, the replacement compressor must be obtained from and the original compressor returned to your local Vertiv sales office. Compressors are shipped in reusable packaging, and the original compressor should be returned in the same packaging.

10.7.4 Compressor Motor Burnout

If a burnout has occurred, a full system clean-out is required. If not cleaned, compressor and system problems will continue.

Consult the factory for compressor maintenance. Do not attempt to remove the compressor without first contacting Vertiv support at 1-800-543-2778.

10.7.5 Unloading Solenoid(s) on a Digital-scroll Compressor

When replacing a digital-scroll compressor, the digital solenoid valve and coil must be replaced. The compressor and valve kit are shipped separately. The valve kit must be field-brazed to the top of the compressor in proper orientation and supported with the original factory bracket.

10 Maintenance 71

10.7.6 Replacing the Compressor

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 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. 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.”

NOTE: Release of refrigerant to the atmosphere is harmful to the environment. Refrigerant must be recycled or discarded in accordance with federal, state, and local regulations.

1. Attach suction and discharge gauges to access fittings.

2. Front-seat service valves to isolate the compressor. Recover refrigerant using an approved recovery procedure and equipment. Use a filter drier when charging the system with recovered refrigerant.

3. Remove marked pressure transducer and discharge pressure switch. Disconnect all electrical connections.

4. Detach service valves from compressor.

5. Remove failed compressor.

6. If required, follow compressor manufacturer’s suggested clean-out procedures.

7. Install replacement compressor and make all connections. Replace gaskets or seals on service valves. Replace unloading solenoid.

8. Evacuate, charge and operate per the appropriate procedure per local codes:

• Evacuation, Leak-testing, and Charging Air-cooled Systems withReceivers on page40

NOTICE

Risk of improper component re-installation. Can cause equipment damage.

Identify and mark location of suction pressure transducer and discharge pressure switch. These devices look similar and they must be reinstalled in their original location.

10.8 Evaporator Coil Performance

The DA080, 085, 125, 150, and 165 units contain nested A-frame coils. This results in different evaporator (suction) temperatures between System 1 and System 2. The outer A-coil (System 1) will operate at a higher evaporator temperature than the inner A-coil (System 2) when operating at the same compressor loading.

The DA050 is a single-circuit A-frame coil.

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10.9 Air-Cooled Condenser Maintenance

Restricted airflow will reduce operating efficiency and could result in high compressor-head pressure and loss of cooling.

• Clear coil surface of all debris that will inhibit airflow.

• Check for bent or damaged coil fins and correct.

• Do not permit snow to accumulate around or under outdoor unit.

• Periodically consider commercial cleaning of coil surface

• Inspect fans, motors and controls for proper operation.

• Check all piping and capillaries for proper support.

• Inspect for leaks.

• Check contactors for pitting. Replace if pitted.

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11 PREVENTIVE MAINTENANCE CHECKLIST

Source: DPN002952, Rev. 4

Inspection Date Job Name Indoor Unit Model # Indoor Unit Serial Number # Condenser/Drycooler Model # Condenser/Drycooler Serial # Room Temperature/Humidity °% Ambient Temperature °

Not all units will have all components. To determine your unit’s configuration, compare the Indoor Unit

Model # above above and the information in the Components and Nomenclature section.

Good maintenance practices are essential to minimizing operation cost and maximizing product life. Read and follow all applicable maintenance checks listed below. At a minimum, these checks should be performed semi-annually. However, maintenance intervals may need to be more frequent based on sitespecific conditions. Review the unit user manual for further information on unit operation. We recommend the use of trained and authorized service personnel, extended service contracts, and factory-certified replacement parts. Contact your local sales representative for more details.

Check all that apply:

Evaporator/Filters

1. Check/Replace filters

2. Grille area unrestricted

3. Wipe section clean

4. Coil clean

5. Clean condensate pan

6. Clean trap in condensate drain

7. Check/Test filter-clog switch operation (if equipped)

Blower Section (EC fan)

1. Mounting bolts tight

2. Fan-guard bolts tight

3. Impeller spins freely

4. Check/Test air sail switch (if equipped)

5. Motor amp draw

• Compare to nameplate amps

#1 L1 L2 L3 #2 L1 L2 L3 #3 L1 L2 L3

Reheat

1. Inspect elements

2. Check wire connections (inside reheat box)

3. Reheat amp draw

L1 L2 L3

Infrared Humidifier (if equipped)

1. Check drain lines and trap for damage/clogs/leaks

2. Check/Clean pan for mineral deposits

3. Clean reflector

4. Check water make-up valve/supply lines/connections for leaks

11 Preventive Maintenance Checklist 75

5. Check humidifier lamps (replace if burnt out)

6. Check/Re-torque wire connections (inside humidifier box)

7. Check humidifier high-water alarm operation

8. Humidifier amp draw

L1 L2 L3

Condensate Pump (if equipped)

1. Check for debris in sump

2. Check operation of float(s) (free movement)

3. Check/Clean discharge check valve

Electrical Panel

1. Check fuses

2. Check contactors for pitting (Replace if pitted)

3. Check/Re-torque wire connections

Controls

1. Check/Verify control operation (Sequence)

2. Check/Test changeover device(s) (if equipped)

3. Check/Test water-detection device(s) (if equipped)

4. Check/Test CAN connection between indoor and outdoor units (if equipped)

Refrigeration Piping

1. Check refrigerant lines (clamps secure/no rubbing/no leaks)

2. Check for moisture (sight glass)

3. Check for restriction temperature drop across filter drier

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Compressor Section

1. Check oil level

2. Check for oil leaks

3. Check compressor mounts (springs/bushings)

4. Cap tubes (not rubbing)

5. Check/Re-torque wire connections (inside compressor box)

6. Compressor operation (vibration/noise)

7. Check crank-case heater fuses/operation

8. Check for refrigerant leaks

9. Suction pressure Circuit #1 _______ Circuit #2 _______ Circuit #3 _______

10. Discharge Pressure Circuit #1 _______ Circuit #2 _______ Circuit #3 _______

11. Superheat Circuit #1 _______ Circuit #2 _______ Circuit #3 _______

12. Low-pressure switch cut out

Circuit #1 _______ Circuit #2 _______ Circuit #3 _______

13. Low pressure cut in Circuit #1 _______ Circuit #2 _______ Circuit #3 _______

14. High pressure cut out Circuit #1 _______ Circuit #2 _______ Circuit #3 _______

15. Amp draw

Circuit #1A L1 L2 L3 Circuit #1B (if tandem) L1 L2 L3 Circuit #2A L1 L2 L3 Circuit #2B (if tandem) L1 L2 L3

11 Preventive Maintenance Checklist 77

Liebert® MC or MCV Condenser

1. Coil clean of debris (Clean coil if required)

2. Fans free of debris

3. Fans securely mounted

4. Motor bearings in good condition

5. Check all refrigerant lines for vibration isolation. Support as necessary

6. Check for refrigerant leaks

7. Check surge-protection device (if installed) status-indicator lights

8. Check/Re-torque wire connections

9. Check contactors for pitting (replace if pitted)

10. Verify operation sequence/set points

11. Charge verification: a. Outdoor Ambient Temperature__________ b. Subcooling__________ c. Indoor-unit Return-air Temperature__________ d. Sight-glass level (if Lee-Temp or pumped refrigerant)_________

12. Motor amp draw

#1 L1 L2 L3 #2 L1 L2 L3 #3 L1 L2 L3 #4 L1 L2 L3 #5 L1 L2 L3 #6 L1 L2 L3 #7 L1 L2 L3 #8 L1 L2 L3 #9 L1 L2 L3 #10 L1 L2 L3 #11 L1 L2 L3 #12 L1 L2 L3 #13 L1 L2 L3 #14 L1 L2 L3 #15 L1 L2 L3 #16 L1 L2 L3

Liebert® EconoPhase Pumped-refrigerant Economizer (if equipped)

1. Check for refrigerant leaks

2. Check/Re-torque wire connections

3. Check contactors for pitting (replace if pitted)

4. Verify pump-speed control operation

5. Check pump mounting

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MAINTENANCE NOTES

Name Signature Company

Make photocopies for your records. Compare readings/information to previous maintenance worksheet.

To locate your local Vertiv representative for Vertiv-engineered parts, check https://www.vertivco.com/en-us/support/ or Call 1-800-543-2778.

11 Preventive Maintenance Checklist 79

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APPENDICES

Appendix A: Technical Support and Contacts

A.1 Technical Support/Service in the United States

Vertiv™ Corporation

24x7 dispatch of technicians for all products.

1-800-543-2378

Liebert® Thermal Management Products

1-800-543-2778

Liebert® Channel Products

1-800-222-5877

Liebert® AC and DC Power Products

1-800-543-2378

A.2 Locations

United States

Vertiv Headquarters

1050 Dearborn Drive

Columbus, OH, 43085, USA

Europe

Via Leonardo Da Vinci 8 Zona Industriale Tognana

35028 Piove Di Sacco (PD) Italy

Asia

7/F, Dah Sing Financial Centre

3108 Gloucester Road

Wanchai, Hong Kong

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Appendix B: Disassembling the DSE for Transport

The Liebert® DSE has a modular frame construction that allows separating the unit into three sections. Each of these sections is more easily maneuvered through tight spaces or placed in small elevators.

A qualified service technician with the required tools and recommended assistance can disassemble an air-cooled unit in about four hours, assuming refrigerant evacuation is not required.

This procedure requires four or more people for lifting the filter and electric-box assembly.

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. 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 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 and exposed fasteners. Can cause injury. Wear appropriate, OSHA-approved personal protective equipment (PPE) when installing the component.

CAUTION: Risk of handling heavy unit and component parts. Can cause injury and equipment damage. Use OSHA-recommended safe lifting techniques and/or lifting equipment rated for the weight of the unit.

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NOTICE

Risk of improper disassembly. Can cause equipment damage.

Disassembling this unit requires substantial work, including reclaiming refrigerant and charging the unit, cutting and brazing refrigerant lines, cutting and brazing water lines, disconnecting and reconnecting electrical lines and moving heavy, bulky equipment. One member of the crew disassembling the unit must be qualified in wiring, brazing and refrigeration.

Improperly disassembling or reassembling the DSE may affect warranty.

The disassembly dimensions and details are described in the submittal documents included in the

Submittal Drawings on page93.

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

Table B.1 Disassembly Dimension Drawings

Document Number Title

Downflow Units

DPN003532 Disassembly, DA050

DPN003140 Disassembly, DA080 and DA085

DPN003178 Disassembly, DA125, DA150 and DA165

Upflow Units

DPN003166 Disassembly, DA080U andDA085U

B.1 Required Equipment

• Piano jacks

• Stepladder

• Refrigeration tools

B.2 Downflow DA050, DA080 and DA085 Disassembly

1. Remove the unit from its shipping skid before beginning.

2. Remove all panels except the top front accent.

3. Remove all filters. This allows access to the screws for metal plate blocking off the top coil and

removal of the filter plate. All wires are hot-stamped and all circuit board connectors are lettered to ease connection. Some cable ties must be cut and replaced. Refer to the unit’s wiring schematic on the unit’s dead-front panel for details.

NOTICE

Risk of improper handling and storage. Can cause equipment damage.

Do not lay the compressor section on its side. It must remain upright. The coil section also must remain upright.

4. Label the three quick-connect plugs from the compressor compartment and disconnect them.

5. Disconnect the two CAN connections and cut the wire ties going to the EEV boxes in the

bottom of the compressor section.

6. Disconnect the compressor wire harness, including the crankcase heater wires, if present, from

the contactor in the electric box.

7. Pull the conduit and wires into the compressor compartment.

8. Disconnect the fan motor wire harness from the bottom of the contactor in the electric box.

9. Pull the conduit and wires into the bottom section of the DSE.

10. Reheat—Optional Component

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a. Disconnect the reheat wire harness from the bottom of the contactor in the electric box. b. Unplug the low-voltage quick connect for the reheat safety wires. c. Pull the conduit and wires into the unit’s blower and coil assembly section.

11. Humidifier—Optional Component a. Disconnect the humidifier wire harness from the bottom of the contactor in the electric

box.

b. For infrared humidifiers: Remove the quick-connect plugs from the following low-voltage

connections: 35-5 and 35-6 (safety under pan), 35-3 and 35-4 (humidifier make-up valve),

and 8-5 and 8-7 (high water alarm). c. Disconnect 35-3 and 35-4 from the control board. d. Pull the conduit and wires into the unit’s blower and coil assembly section.

12. Condensate Pump—Optional Component a. Disconnect the condensate pump’s high-voltage wiring harness. b. Remove the low-volt wires from terminal strips #24 and #55. c. Pull the conduit and wires into the unit’s blower and coil assembly section.

13. Disconnect the air sail switch wires and pull them into the electric box.

14. Smoke Detector—Optional Component a. Remove the smoke detector cover. b. Remove the plug connector from the smoke detector and pull it into electric box. c. Remove the wires from terminal strips #91, 92, 93 and route them into the smoke detector

box.

d. Remove the sensing tube from top of the smoke detector.

The wand and tube will remain attached to filter and electric-box assembly.

15. Close the electric-box cover and the accent panel.

16. Remove the pull bar that supports the accent panel from the left end of unit, otherwise it will

fall out when the compressor section is removed.

17. Evacuate and recover all refrigerant from the DSE.

Air-cooled units are shipped with a nitrogen holding charge.

NOTICE

Risk of compressor oil contamination with moisture. Can cause equipment damage.

We recommend front-seating the compressor service valves. Front-seating the valves keeps the nitrogen or refrigerant charge in the compressor and prevents moisture from contaminating the compressor oil.

18. Cut the insulation and pull it back from the piping.

19. Cut the refrigerant piping with a tubing cutter; if there is no Schrader fitting, let the nitrogen

bleed out before cutting all the way through the pipe.

NOTE: We do not recommend un-sweating refrigerant connections.

20. Immediately cap and seal all piping that has been cut, including the suction and liquid lines.

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Removing Compressor Assembly forDownflowDA050,DA080andDA085

1. Secure the compressor wire harness to the compressor assembly.

2. Remove the 10 thread-cutting bolts holding the compressor section assembly to the filter and

electric-box assembly and the blower and coil assembly. There are five bolts in the front, four in the back and one on the top at the middle of the unit.

a. Begin removing bolts at the bottom of the unit and progress toward the top. Use this

method for the front and back bolts.

b. Stabilize the compressor section before removing the top, middle bolt.

NOTICE

Risk of improper handling. Can cause compressor and/or piping damage.

The compressor section is top-heavy and has a small base. It must remain upright. Do not lay the compressor section on its side during or after removing it from the DSE. Do not remove shipping blocks from semi-hermetic compressors until the DSE is fully reassembled and ready for installation.

NOTE: We recommend using piano jacks when moving this section.

Removing Filter and Electric-box forDownflowDA050,DA080andDA085

1. Using a stepladder to reach the top of the DSE, remove the filter support plate; it is attached to

the filter and electric-box assembly with two screws, one on each end.

c. Remove tags from the Schrader fittings on top of the coil headers. Retain the tags for

replacement during reassembly.

d. Remove 16 screws, (8) on each side, from the evaporator top cover plate to coil assembly.

Coil top blocker will remain with top section for rigidity. e. Remove coil access plates from the left side of the DSE. f. Remove the four thread-cutting bolts securing the filter and electric-box assembly to the

blower and coil assembly. There are two on the left and two on the right. g. Separate the unit sections with caution.

Notice

Risk of improper handling. Can cause equipment damage.

• The filter and electric-box section should be moved forward and set on the floor.

• Make sure to lift the coil plate over the Schrader fittings on the headers. We recommend using four people to remove this section. Special care is required when moving this section because the legs are not designed to withstand strong shocks.

• The blower and coil assembly must remain upright. The coil is not secured to the blower and coil assembly.

• Secure the coil to the bottom section with straps or a similar method before moving the section.

2. Move each section of the DSE to the installation location.

B.3 Reassembling Downflow DA050, DA080 and DA085

1. Replace the top section. Make sure to clear the Schrader valves on the coil header.

2. Reconnect the filter and electric-box assembly to the blower and coil assembly using threadcutting bolts. Torque the bolts to 225 in-lb. (25 Nm)

3. Reattach the evaporator top cover plate; there are eight screws on each side.

4. Reattach the filter support plate to the filter and electric-box assembly; there is one screw on each side.

5. Reattach the tags to the Schrader fittings on top of the coil headers.

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6. Replace the compressor section. Insert all compressor thread-cutting bolts before tightening any of the bolts.

7. Reinstall the pull bar to support the accent panel.

8. Reattach the low-voltage plugs in the compressor section.

9. Reconnect the wiring for the compressor, fan motor, reheat, humidifier, condensate pump, smoke detector and air sail switch.

10. Reattach the sensing tube to the top of the smoke detector.

Reconnecting Piping, Charging andReplacingPanels forDownflowDA050,DA080and DA085

1. Piping must be reassembled in accordance with local codes.

2. Move insulation and plastic bushings away from the brazing area.

3. Wrap piping with wet cloths. Use copper fittings where required.

4. Refer to Piping and Refrigerant Requirements on page31, for piping guidelines and to the ASHRAE Refrigeration Handbook for general, good-practice refrigeration piping.

5. Open the service valves on the compressor.

6. Reinsert the plastic bushings.

7. Charge the DSE with refrigerant; see the unit’s nameplate for the proper charge.

8. Reinstall the galvanized panels on the left side of the coil.

9. Replace the filters.

10. Replace the panels.

Re-assembly Checklist for DownflowDA050, DA080 and DA085

1. Thread-cutting bolts reconnected and torqued to 225 in-lb. (25 Nm)

2. Top cover plate attached to coil

3. Filter plate attached

4. High-voltage wires connected to proper contactors:

a. Compressor b. Fan motor c. Reheat, if applicable d. Humidifier, if applicable e. Condensate pump, if applicable

5. Low-voltage wires connected

a. Actuator b. Terminal strip c. Plug connections d. Smoke detector, if applicable

6. Coil access plates on right and left replaced

7. Humidifier lines brazed

8. Suction and liquid refrigerant lines brazed

9. Vacuum pulled and unit checked for leaks

10. Unit recharged

11. Filters replaced

12. Panels replaced

B.4 Downflow DA125, DA150 and DA165 Disassembly

1. Remove the unit from its shipping skid before beginning.

2. Remove all panels except the top front accent.

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NOTICE

3. All wires are hot-stamped and all circuit board connectors are lettered to ease connection. Some cable ties must be cut and replaced. Refer to the unit’s wiring schematic on the unit’s dead-front panel for details.

Risk of improper handling. Can cause compressor and/or piping damage.

Do not lay the compressor section on its side. It must remain upright. The coil section also must remain upright.

4. Label the three quick-connect plugs from the compressor compartment and disconnect them.

5. Disconnect the CAN connections going to the EEV boxes in front of each compressor.

6. Disconnect the compressor wire harness, including the crankcase heater wires, from the contactor in the electric box.

7. Pull the conduit and wires into the compressor compartment.

8. Close the electric-box cover and the accent panel.

9. Evacuate and recover all refrigerant from the DSE.

Air-cooled units are shipped with a nitrogen holding charge.

Risk of compressor oil contamination with moisture. Can cause equipment damage.

We recommend front-seating the compressor service valves. Front-seating the valves keeps the nitrogen or refrigerant charge in the compressor and prevents moisture from contaminating the compressor oil.

10. Cut the insulation and pull it back from the piping.

11. Cut the refrigerant piping with a tubing cutter; if there is no Schrader fitting, let the nitrogen bleed out before cutting all the way through the pipe.

NOTE: We do not recommend un-sweating refrigerant connections.

12. Immediately cap and seal all piping that has been cut, including the suction and liquid lines.

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Removing Compressor Assembly forDownflowDA125,DA150andDA165

1. Secure the compressor wire harness to the compressor assembly.

2. Remove the 20 thread-cutting bolts holding the compressor section assembly to the filter and electric-box assembly and the blower and coil assembly. There are eight bolts in the front, eight in the back and four in the bottom of the unit.

a. Begin removing bolts at the bottom of the unit and progress toward the top. Use this

method for the front and back bolts.

b. Stabilize the compressor section before removing the bolts.

NOTICE

Risk of improper handling. Can cause compressor and/or piping damage.

The compressor section is top-heavy and has a small base. It must remain upright. Do not lay the compressor section on its side during or after removing it from the DSE.

NOTE: We recommend using piano jacks when moving this section.

Notice

Risk of improper handling. Can cause equipment damage.

• The blower and coil assembly must remain upright. The coil is not secured to the blower and coil assembly.

• Secure the coil to the bottom section with straps or a similar method before moving the section.

3. Move each section of the DSE to the installation location.

B.5 Reassembling Downflow DA125, DA150andDA165

1. Replace the compressor section. Insert all thread-cutting compressor bolts before tightening any of the bolts.

2. Reattach the low-voltage plugs in the compressor section.

3. Reconnect the wiring for the compressor.

Reconnecting Piping, Charging andReplacingPanelsforDownflowDA125,DA150andDA165

1. Piping must be reassembled in accordance with local codes.

2. Move insulation and plastic bushings away from the brazing area.

3. Wrap piping with wet cloths. Use copper fittings where required.

4. Refer to Piping and Refrigerant Requirements on page31, for piping guidelines and to the ASHRAE Refrigeration Handbook for general, good-practice refrigeration piping.

5. Open the service valves on the compressor.

6. Reinsert the plastic bushings.

7. Charge the DSE with refrigerant; see the unit’s nameplate for the proper charge.

8. Reinstall the galvanized panels on the left side of the coil.

9. Replace the panels.

10. Install the filter plenum as instructed in the instructions included with the plenum.

Re-assembly Checklist forDownflowDA125,DA150andDA165

1. Thread-cutting bolts reconnected and torqued to 225 in-lb. (25 Nm)

2. Top cover plate attached to coil

3. Filter plate attached

4. High-voltage wires connected to proper contactors on compressor

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5. Low-voltage wires connected

a. Actuator b. Terminal strip c. Plug connections

6. Suction and liquid refrigerant lines brazed

7. Vacuum pulled and unit checked for leaks

8. Unit recharged

9. Panels replaced

10. Filter plenum installed.

B.6 Upflow DA080 and DA085 Disassembly

1. Remove the unit from its shipping skid before beginning.

2. Remove all panels except the top front accent.

3. Remove all filters. This allows easier access to items located in the filter and coil assembly.

4. All wires are hot-stamped and all circuit board connectors are lettered to ease connection. Some cable ties must be cut and replaced. Refer to the unit’s wiring schematic on the unit’s dead-front panel for details.

5. Label the three quick-connect plugs from the compressor compartment and disconnect them.

6. Disconnect the two CAN connections and cut the wire ties going to the EEV boxes in the bottom of the compressor section.

7. Disconnect the compressor wire harness, including the crankcase heater wires, if present, from the contactor in the electric box.

8. Pull the conduit and wires into the compressor compartment.

9. Reheat-Optional Component

a. Disconnect the reheat wire harness from the bottom of the contactor in the electric box. b. Unplug the low-voltage quick connect for the reheat safety wires. c. Pull the conduit and wires into the unit’s filter and coil assembly section.

10. Humidifier-Optional Component

a. Disconnect the humidifier wire harness from the bottom of the contactor in the electric

box.

b. For infrared humidifiers: Remove the quick-connect plugs from the following low-voltage

connections: 35-5 and 35-6 (safety under pan), 35-3 and 35-4 (humidifier makeup valve),

and 8-5 and 8-7 (high water alarm). c. Disconnect 35-3 and 35-4 from the control board. d. Pull the conduit and wires into the unit's filter and coil assembly section.

11. Condensate Pump-Optional Component a. Disconnect the condensate pump’s high-voltage wiring harness. b. Remove the low-volt wires from terminal strips #24 and #55. c. Pull the conduit and wires into the unit’s filter and coil assembly section.

12. Smoke Detector-Optional Component a. Remove the smoke detector cover. b. Remove the plug connector from the smoke detector and pull it into the electric box. c. Remove the wires from terminal strips #91, 92, 93 and route them into the smoke detector

box.

d. Remove the sensing tube from the bottom of the plastic elbow.

13. Close the electric-box cover and the accent panel.

14. Remove the pull bar that supports the accent panel from the left end of the unit, otherwise it

will fall out when the compressor section is removed.

15. Evacuate and recover all refrigerant from the DSE. Air-cooled units are shipped with a nitrogen

holding charge.

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NOTICE

Risk of compressor oil contamination with moisture. Can cause equipment damage.

We recommend front-seating the compressor service valves. Front-seating the valves keeps the nitrogen or refrigerant charge in the compressor and prevents moisture from contaminating the compressor oil.

16. Cut the insulation and pull it back from the piping.

17. Cut the refrigerant piping with a tubing cutter; if there is no Schrader fitting, let the nitrogen

bleed out before cutting all the way through the pipe.

NOTE: We do not recommend un-sweating refrigerant connections.

18. Immediately cap and seal all piping that has been cut, including the suction and liquid lines.

Removing Compressor Assembly for Upflow DA080 and DA085

1. Secure the compressor wire harness to the compressor assembly.

2. Remove the 10 thread-cutting bolts holding the compressor section assembly to the filter, the

electric-box assembly and the blower and coil assembly. There are five bolts in the front, four in the back and one on the top at the middle of the unit.

a. Begin removing bolts at the bottom of the unit and progress toward the top. Use this

method for the front and back bolts.

b. Stabilize the compressor section before removing the top, middle bolt.

NOTICE

Risk of improper handling. Can cause compressor and/or piping damage.

The compressor section is top-heavy and has a small base. It must remain upright. Do not lay the compressor section on its side during or after removing it from the DSE.

NOTE: We recommend using piano jacks when moving this section.

Removing Blower and Electric-box forUpflow DA080 and DA085

1. Remove the access plate from right end of unit. This will provide a place to grasp the blower

and electric-box assembly and move it. Remove the coil access plates on the left side of the unit for clearance when brazing the suction and discharge lines.

2. Remove the thread-cutting bolts holding the unit sections together; there are four on the left

and four on the right.

3. Separate the unit sections with caution.

NOTICE

Risk of improper handling. Can cause damage to the DSE.

• The blower and electric-box section should be moved forward and set on the floor. We recommend using four people to remove this section.

• The filter and coil assembly must remain upright. The coil is not secured to the filter and coil assembly.

• Secure the coil to the bottom section with straps or a similar method before moving the section.

4. Move each section of the DSE to the installation location.

B.7 Reassembling Upflow DA080 and DA085

1. Replace the top section. Make sure to clear the Schrader valves on the coil header.

2. Reattach the top section using thread-cutting bolts; there are four on each side. Torque the bolts to 225 in-lb. (25 Nm)

3. Reinstall the motor access plate. Do not replace the left end coil access plates until brazing is finished.

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4. Reattach compressor section. Insert all compressor thread-cutting bolts before tightening them all down.

5. Reinstall the pull bar to support the accent panel, if applicable.

6. Reattach the low-voltage plugs in the compressor section.

7. Reconnect the wiring for the compressor, reheat, humidifier, condensate pump and smoke detector if applicable.

8. Reattach the sensing tube.

9. Piping must be reassembled in accordance with local codes.

10. Move insulation and plastic bushings away from the brazing area.

11. Wrap piping with wet cloths. Use copper fittings where required.

12. Refer to Piping and Refrigerant Requirements on page31, for piping guidelines and to the ASHRAE Refrigeration Handbook for general, good-practice refrigeration piping.

13. Open the service valves on the compressor.

14. Reinsert the plastic bushings.

15. Pull vacuum, check for leaks, and charge the DSE with refrigerant. See the unit's nameplate for the proper charge.

16. Reinstall the galvanized panels on the left side of the coil.

17. Replace the filters.

18. Replace the panels.

Reassembly Checklist forUpflow DA080 and DA085

1. Thread-cutting bolts reconnected and torqued to 225 in-lb. (25Nm)

2. High-voltage wires connected to proper contactors:

a. Compressor b. Reheat, if applicable c. Humidifier, if applicable d. Condensate pump, if applicable

3. Low-voltage wires connected

a. Terminal strip b. Plug connections c. Smoke detector, if applicable

4. Coil access plates on left replaced

5. Motor access plate on right side replaced

6. Suction and liquid refrigerant lines brazed

7. Vacuum pulled and unit checked for leaks

8. Unit recharged

9. Filters replaced

10. Panels replaced

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Vertiv | Liebert® DSE™ Installer/UserGuide

Appendix C: Submittal Drawings

The submittal drawings are in the order of document part number (DPN). Table C.1 below, groups the drawings by topic/application.

Table C.1 Submittal-drawings Contents

Document Number Title

Component Location

DPN003452 Component Location, Typical, Downflow Models

DPN003451 Component Location, Typical, Upflow Models

Planning Dimensions - Downflow Units

DPN003533 Cabinet DimensionalData, DA050

DPN004083 Cabinet DimensionalData, DA080 and DA085

DPN003175 Cabinet DimensionalData, DA125, DA150 and DA165

Planning Dimensions - Upflow Units

DPN002950 Cabinet DimensionalData, DA080U and DA085U

Planning Dimensions - Floor Stands

DPN004079 Floorstand DimensionalData, Downflow, DA050

DPN004073 Floorstand DimensionalD ata, D ownflow and Upflow, DA080 and DA085

DPN003177 Floorstand DimensionalData, Downflow, DA125, DA150 and DA165

Planning Dimensions - Plenums

DPN003514 Plenum DimensionalData, Downflow, DA050, DA080 and DA085

DPN004081 Plenum Dimensional Data, Upflow, DA080U andDA085U

Piping Schematics

DPN002615 Piping Schematic, DA050, DA080 and DA085 with MC Condenser

DPN002340 PipingSchematic, DA125, DA150 and DA165 with MCCondenser

DPN0004476 Piping Schematic, DA125, DA150 andDA165 with MCV Condenser

Piping Arrangement - Liebert® MCCondenser and EconoPhase Pump Locations

DPN003994 Considerations for mounting MC Condenser/EconoPhase Above or at Same Level as DSE

DPN003552 Typical arrangement for single-circuit system

DPN002324 Typical arrangement for dual-circuit system

Piping Connections -Downflow Units

DPN003531 Connection Locations, DA050

DPN004080 Connection Locations, DA080 andDA085

DPN002312 Connection Locations, DA125

DPN004037 Connection Locations, DA150 andDA165

Piping Connections -Upflow Units

DPN002951 Connection Locations, DA080U and DA085U

93

Table C.1 Submittal-drawings Contents (continued)

Document Number Title

Electrical Connections

DPN004387 ElectricalField Connec tions, Upflow &Downflow, DA050, DA080, and DA085 Models

DPN004388 Electrical Field Connections, Downflow Models, DA125, DA150, and DA165

DPN003284

DPN002361

Unit-to-Unit Networking

DPN004351 Liebert® iCOM Unit-to-unit Network Connections

DisassemblyDimensions - Downflow Units

DPN003532 Disassembly, DA050

DPN003140 Disassembly, DA080 and DA085

DPN003178 Disassembly, DA125, DA150 and DA165

DisassemblyDimensions - Upflow Units

DPN003166 Disassembly, DA080U andDA085U

CANbus cable connections between indoor unit, 1 Liebert® MCcondenser andoptional Liebert® EconoPhase pump

CANbus cable connections between indoor unit, 2 Liebert® MCcondensers and optional Liebert® EconoPhase pump

94

Vertiv | Liebert® DSE™ Installer/UserGuide

2 3/4" 68mm

12 1/8" 308mm

LIEBERT DSE

PRIMARY CONNECTION LOCATIONS

DOWNFLOW AIR COOLED DA125 MODELS

WITH AND WITHOUT ECONOPHASE

ALL DIMENSIONS FROM REAR CORNER OF UNIT INCLUDING PANELS

X

1

O

3 3/8" 86mm

L1 LIQUID LINE SYSTEM 1 127-7/8" (3248mm) 13-3/4" (348mm) 7/8" O.D. Cu 7/8" O.D. Cu L2 LIQUID LINE SYSTEM 2 124-13/16" (3170mm) 13-3/4" (348mm) 7/8" O.D. Cu 7/8" O.D. Cu G1 HOT GAS DISCHARGE 1 140" (3554mm) 14" (355mm) 1-1/8" O.D. Cu 1-3/8" O.D. Cu G2 HOT GAS DISCHARGE 2 136-11/16" (3471mm) 14" (355mm) 1-1/8" O.D. Cu 1-3/8" O.D. Cu

CD

HUM HUMIDIFIER SUPPLY LINE 101-1/4" (2572mm) 43" (1091mm) 1/4" O.D. Cu 1/4" O.D. Cu

E1 ELECTRICAL CONN. (HIGH VOLT) 113" (2870mm) 42-1/2" (1080mm) 2-1/2" 2-1/2"

E2 ELECTRICAL CONN. (HIGH VOLT) 110" (2794mm) 42-1/2" (1080mm) 2-1/2" 2-1/2" LV1 ELECTRICAL CONN. (LOW VOLT) 2-1/2" (64mm) 36" (914mm) 7/8" 7/8" LV2 ELECTRICAL CONN. (LOW VOLT) 2-1/2" (64mm) 37-1/2" (952mm) 7/8" 7/8" LV3 ELECTRICAL CONN. (LOW VOLT) 2-1/2" (64mm) 39" (991mm) 7/8" 7/8"

Notes:

G1

R REFRIGERANT ACCESS 122-5/16" (3106mm) 12-1/8" (333mm) 19" (483mm) X 3-3/8" (86mm) 19" (483mm) X 3-3/8" (86mm)

CONDENSATE DRAIN (infrared humidifier or no humidifier)

W/ OPTIONAL PUMP 110" ( 2794mm) 35-1/16" (891mm) 1/2" O.D. Cu 1/2" O.D. Cu

G2

19" 483mm

L1L2

R

5

EC Fan

Outlet

2

CD

E1

E2

HUM

4

5

3 3

110" (2794mm) 35-1/16" (891mm) 1-1/8" NPT Female 1-1/8" NPT Female

2

Front of Unit

144" 3657mm

YXDESCRIPTIONPOINT DX W/ ECONOPHASE

CONNECTION SI ZE / OPENING

EC Fan

Outlet

DX ONLY

EC Fan

Outlet

LV1 LV2

LV3

Y

47" 1193mm

1. Drawing not to scale. All dimensions from rear corner of unit including panels, and have a tolerance on all piping dimensions is ± 1/2" (13mm).

2. Field pitch Condensate Drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory installed condensate trap. Do not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply with all local codes.

3. When piping out the top of the unit, install traps in the discharge lines in the bottom of the unit before running lines to the top.

4. Opening for conduit chase, E1 and E2 are openings for conduit for connections to 2-1/2", 1-3/4" and 1-3/8" knockouts at electric panel.

5. See DPN003175 for alternate piping from top of unit.

DPN002312 Page :1 /1

Form No.: DPN001040_REV4

REV : 8 REV DATE : 5/18

LIEBERT ECONOPHASE

UNIT ARRANGEMENT DIAGRAM

CONDENSER AND DUAL CIRCUIT ECONOPHASE UNIT

CIRCUIT 1

CIRCUIT 2

TOP VIEW

Air Cooled Condenser

CIRCUIT 1

Entering Hot Gas Line

3

Liquid from Condenser 1-3/8" (PR085-PR125) 1-5/8" (PR250). DO NOT TRAP LINE! Slope (2 in. per 10 ft.) down towards EconoPhase unit.

42"

1067mm Minimum Clearance

5

Air Cooled Condenser

Entering Hot Gas Line

TOP VIEW

CIRCUIT 2

5

LIQUID LINE TO ECONOPHASE UNIT FROM BOTTOM OF RECEIVER

Liquid from Condenser

3

1-3/8" (PR085-PR125)

1-5/8" (PR250).

DO NOT TRAP LINE!

Slope (2 in. per 10 ft.) down

towards EconoPhase unit.

CIRCUIT 1

EconoPhase Unit

Notes:

1. For proper pump function, a minimum elevation difference of 60” (1524 mm) must be maintained between the bottom of condenser box to the bottom of EconoPhase unit.

2. All indoor and outdoor field refrigerant piping must be insulated, 1/2" minimum. All outdoor insulation must be UV and ozone resistant.

3. Components are not supplied by Liebert but are required for proper circuit operation and maintenance.

4. For Piping Elevation refer to DPN003994.

5. Liebert MC Condenser with legs taller than 18" (457mm) require a minimum spacing of 6" (152mm) for leg bracing.

CIRCUIT 2

DPN002324 Page :1 /1

Form No.: DPN001040_REV4

FACTORY SUPPLIED, FIELD INSTALLED FIELD PIPING

60" 1524mm

Typ.

REV : 10 REV DATE : 5/18

1

DA125, DA150 & DA165 W/ LIEBERT MC

LIEBERT MC WITH DSE RECEIVER AND OPTIONAL ECONOPHASE

Pressure Transducer

LIEBERT MC CONDENSER

LIEBERT DSE

PIPING SCHEMATIC

Differential Check Valve

Liquid from Condenser

2

LIEBERT DSE

RECEIVER

Optional "EconoPhase" UNIT

Ball Valve

Check

Valve

Solenoid Valve

Differential Check Valve

Liquid to Indoor Unit

2

Ball Valve

Includes Factory traps. No external trap required.

LIEBERT DSE

Service Valve

Electronic Expansion Valve

FACTORY REFRIGERANT PIPING

Notes:

1. Two refrigeration circuits provided. Single refrigeration circuit shown for clarity.

2. Circuit 1 must be maintained between indoor unit, condenser and EconoPhase unit. Circuit 2 must be maintained between indoor unit, condenser and EconoPhase unit.

3. Schematic representation shown. Do not use for specific connection locations.

4. The outlet of the receiver must be higher than the elevation of the EEV inside the indoor unit. This vertical height must not exceed 60ft. (18.3m). Liebert DSE Receiver required for systems with or without EconoPhase.

5. All indoor and outdoor field refrigerant piping must be insulated, 1/2" minimum thickness. All outdoor insulation must be UV and ozone resistant.

FIELD PIPING

HOT GAS DISCHARGE

Service Valve

Check Valve

Sight Glass

Hot Gas Discharge from Indoor Unit

LIQUID

SUCTION

Check Valve

2

Filter Drier

SERVICE/SCHRADER (ACCESS) CONNECTION, NO VALVE CORE.

SERVICE/SCHRADER (ACCESS) CONNECTION, WITH VALVE CORE.

EVAPORATOR

COIL

6

Field installed relief valves required for 50Hz EU CE units rated maximum 650 PSIG (45 bar)

HOT GAS DISCHARGE

LIQUID RETURN

2

6

For rises over 25ft. (7.6m), trap every 20ft. (6m) or evenly divided*

INTERCONNECTING PIPING

Trap at base of risers

6

over 5ft. (1.5m)*

6. Components are not supplied by Liebert but are required for proper circuit operation and maintenance.

7. Traps must be installed and horizontal lines pitched to ensure proper oil return and to reduce liquid flood back to compressor. Pitch horizontal gas piping at a minimum of 1/2" per 10 feet (42mm per 10m) so that gravity will aid in moving oil in the direction of the refrigeration flow.

8. Do not isolate any refrigerant circuits from over pressurization protection.

DPN002340 Page :1 /1

Form No.: DPN001040_REV4

REV : 13 REV DATE : 2/18

LIEBERT DSE

CANbus & INTERLOCK CONNECTIONS

USING 2 LIEBERT MC CONDENSERS & OPTIONAL ECONOPHASE UNIT

ECONOPHASE CONTROL

BOARD DUAL CIRCUIT

CONDENSER 2

C

B

G

(FACTORY SET)

CIRCUIT ONE

J6

31

ON

SW6

CAN

CIRCUIT TWO

J6

31

ON

SW6

CAN

TWO CONDENSERS WITH ECONOPHASE

CONDENSER 2

J6

31

ON

SW6

CAN

CONDENSER 1

J6

31

ON

SW6

CAN

CONNECTION

SH

SHIELD

70 71

230

CANBUS

C

COMMUNICATION CABLE

TB50

1

CAN H

2

OUTPUT

3

CAN L

TB49

1

INPUT

2 3

3

TB50

1

CAN H

OUTPUT

2 3

CAN L

TB49

1

INPUT

2 3

B

G

3

4

ECONOPHASE UNIT

LAST DEVICE ON CANBUS

(IF PRESENT)

HEAT REJECTION INTERLOCK WIRE

CONDENSER 1

FACTORY WIRING BETWEEN CONTROL BOARDS AND TERMINAL STRIP.

NO SHIELD

CONNECTION

DETAIL 4

CAN CABLE CONNECTION (C)

TB50

1 2

OUTPUT

3

TB49

1 2

INPUT

3

(CONDENSER 1) B (CONDENSER 2) C

CAN H

CAN L

HL

TB50

HL

TB49

A (CONDENSER 1) B (CONDENSER 2)

DETAIL 3

CAN CABLE CONNECTION

CONDENSER 1 (B) (A) CONDENSER 2 (C) (B)

HEAT REJECTION INTERLOCK

ON

SW6

CAN

J6

31

SHIELD CONNECTION

CONDENSER 1

B

A

F

ECONOPHASE CONTROL

BOARD SINGLE CIRCUIT

(FACTORY SET)

CIRCUIT ONE

31

ON

CAN

ADDRESSING

CONDENSERS

CONDENSER 2

31

ON

CAN

CONDENSER 1

31

ON

CAN

SH

G

TWO

230

SW6

70 71

J6

CANbus

SWITCH

J6

CANbus

ADDRESSING

SWITCH

REMOVE JUMPER

CONDENSER 2

FACTORY WIRING BETWEEN iCOM AND TERMINAL STRIP

DETAIL 1 CAN CABLE CONNECTION (A)

See sheet 2 for Component notes, Cable notes, & Wire notes.

DPN002361 Page :1 /2

Form No.: DPN001040_REV4

A

SH

49-1 49-3

230

71

70

F

DETAIL 2

HEAT REJECTION INTERLOCK (F)

F

HEAT REJECTION INTERLOCK WIRE

CANBUS COMMUNICATION CABLE

A

2

1

INDOOR DSE UNIT

REV : 9 REV DATE : 5/17

LIEBERT DSE

CANbus & INTERLOCK CONNECTIONS

USING 2 LIEBERT MC CONDENSERS & OPTIONAL ECONOPHASE UNIT

COMPONENT NOTES:

1. COMPONENT APPEARANCE, ORIENTATION , AND POSITION MAY VARY BETWEEN PRODUCT LINES. TERMINAL NAMES AND CALLOUTS REMAIN CONSTANT.

2. ALL CIRCUITS TO THESE CONNECTION POINTS ARE CLASS 2.

CAN & CABLE NOTES (A, B, C):

1. CABLE MUSTHAVE THE FOLLOWING SPECIFICATIONS:

- BRAIDED SHIELD OR FOIL SHIELD WITH DRAIN WIRE

- SHIELD MUST BE WIRED TO GROUND AT INDOOR UNIT

- 22-18AWG STRANDED TINNED COPPER

- TWISTED PAIR (MINIMUM 4 TWISTS PER FOOT)

- LOW CAPACITANCE (15pF/FT OR LESS)

- MUST BE RATED TO MEET LOCAL CODES AND CONDITIONS.

- EXAMPLES BELDEN 89207 (PLENUM RATED), OR ALPHA WIRE 6454 CATEGORY 5, 5E, OR HIGHER.

2. DO NOT RUN IN SAME CONDUIT, RACEWAY, OR CHASE AS HIGH VOLTAGE WIRING.

3. FOR CANBUS NETWORK LENGTHS GREATER THAN 450FT(137M), CONTACT LIEBERT FACTORY.

INTERLOCK WIRE NOTES (F):

1. FIELD SUPPLIED WIRE

- 3 CONDUCTOR 18AWG OR GREATER

- RATED 600V

2. RUN FIELD SUPPLIED WIRES BETWEEN THE INDOOR UNIT AND CONDENSER 1.

INTERLOCK WIRE NOTES (G):

1. FIELD SUPPLIED WIRE

- MINIMUM 1 CONDUCTOR 18AWG OR GREATER

- RATED 600V

2. RUN FIELD SUPPLIED WIRES BETWEEN CONDENSER 1 AND CONDENSER 2.

DPN002361 Page :2 /2

Form No.: DPN001040_REV4

REV : 9 REV DATE : 5/17

DA050, DA080 & DA085 MODELS W/ LIEBERT MC

LIEBERT MC WITH DSE RECEIVER AND OPTIONAL LIEBERT ECONOPHASE

Pressure Transducer

PIPING SCHEMATIC

Differential Check Valve

Liquid from Condenser

2

LIEBERT DSE

Optional "EconoPhase" UNIT

Check

Valve

Differential Check Valve

LIEBERT MC CONDENSER

Includes Factory traps. No external trap required.

LIEBERT DSE

RECEIVER

HOT GAS DISCHARGE

LIQUID

Service Valve

Check Valve

Hot Gas Discharge from Indoor Unit

SUCTION

Field installed relief valves required for 50Hz EU CE units rated maximum 650 PSIG (45 bar)

Ball

Valve

EVAPORATOR

COIL

Solenoid

Valve

2

6

Liquid to Indoor Unit

2

Ball

Valve

6

For rises over 25ft. (7.6m), trap every 20ft. (6m) or evenly divided

Service Valve

Electronic

Expansion Valve

FACTORY REFRIGERANT PIPING

FIELD PIPING

Notes:

1. Two refrigeration circuits provided on DA080 & DA085. Single refrigeration circuit provided on DA050. Single refrigeration circuit shown for clarity.

2. Circuit 1 must be maintained between indoor unit, condenser and EconoPhase unit. Circuit 2 must be maintained between indoor unit, condenser and EconoPhase unit.

3. Schematic representation shown. Do not use for specific connection locations.

4. The outlet of the receiver must be higher than the elevation of the EEV inside the indoor unit. This vertical height must not exceed 60ft. (18.3m). Liebert DSE Receiver required for systems with or without EconoPhase unit.

5. All indoor and outdoor field refrigerant piping must be insulated, 1/2" minimum thickness. All outdoor insulation must be UV and ozone resistant.

6. Components are not supplied by Liebert but are required for proper circuit operation and maintenance.

7. Traps must be installed and horizontal lines pitched to ensure proper oil return and to reduce liquid flood back to compressor. Pitch horizontal hot gas piping at a minimum of 1/2" per 10 feet (42mm per 10m) so that gravity will aid in moving oil in the direction of refrigeration flow.

8. Do not isolate any refrigeration circuits from over pressurization protection.

Sight Glass

DPN002615 Page :1 /1

Form No.: DPN001040_REV4

Check Valve

Filter Drier

HOT GAS DISCHARGE

LIQUID RETURN

2

SERVICE/SCHRADER (ACCESS) CONNECTION, NO VALVE CORE.

SERVICE/SCHRADER (ACCESS) CONNECTION, WITH VALVE CORE.

INTERCONNECTING PIPING

Trap at base of risers over 5ft. (1.5m)

6

REV : 10 REV DATE : 2/18