Vaisala DS User Manual

Liebert®

DS™ ThermalManagementSystem

Installer/User Guide

35to 105kW (10to 30ton) Capacity, UpflowandDownflow, 50and60Hz, Air-cooled, Water/Glycol-cooled, GLYCOOL™EconomizerCoil, Dual-CoolDXwithSecondaryChilled-waterCoil

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

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

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

Technical Support Site

If you encounter any installation or operational issues with your product, check the pertinent section of this manual to see if the issue can be resolved by following outlined procedures. Visit https://www.Vertiv.com/en-us/support/ for additional assistance.

Vertiv | Liebert® DS ™ In staller/User Guide

TABLE OF CONTENTS

1 Important Safety Instructions 1

2 Nomenclature and Components 9

2.1 Liebert DS Model Number Nomenclature 9

2.2 Component Location 11

3 Pre-installation PreparationandGuidelines 13

3.1 Planning Dimensions 13

3.2 Air Distribution Considerations for Downflow Units 14

3.3 Air Distribution Considerations for Upflow Units 16

3.4 Connections and System Setup 17

3.5 Operating Conditions 18

3.5.1 Cooling, Humidification and Dehumidification 18

3.5.2 Heating 18

3.6 Shipping Dimensions andUnitWeights 18

4 Equipment Inspection and Handling 21

4.1 Packaging Material 21

4.2 Handling the Unit while Packaged 22

4.3 Unpacking the Unit 23

4.3.1 Removing the Unit from the Skid with a Forklift 23

4.3.2 Removing the Unit from theSkid Using Rigging 24

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

4.4 Remove Shipping Blocks fromUnitswithSemi-HermeticCompressors 27

4.5 Placing the Unit on a Floor Stand 28

5 Piping and Refrigerant Requirements 29

5.1 Drain and Humidifier Fluid Piping 31

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 34

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 39

5.2.5 Evacuation, Leak Testing, and Charging Air CooledSystems withoutLiebertLee-Temp™ Receivers 42

5.2.6 Evacuation, Leak Testing, and Charging Air Cooled Systems withLiebertLee-Temp™ “Flooded Condenser” Head PressureControlSystem 46

5.3 Refrigerant Charge for Water/Glycol Cooled Systems 48

5.4 Water/Glycol Loop Piping Guidelines 49

5.4.1 Leak Checking for Unit and Field Installed Piping 50

6 Electrical Connections 51

7 EC Fans and Plenums 53

7.1 Downflow Units with EC Fans 53

7.1.1 Lowering the EC Fans into the Floor Stand on Downflow Models 53

7.2 Upflow Unit Plenums with EC Fans 56

7.2.1 Assembly Inspection 57

7.2.2 Assemble Plenum Rear and Side Panels 62

7.2.3 Place Assembled Panels and EC Fans on Top of Unit 66

7.2.4 Wire the EC Fans 70

7.2.5 Install Front Panels on Plenum 72

8 Checklist for Completed Installation 83

8.1 Moving and Placing Equipment 83

8.2 Electrical Installation Checks 83

8.3 Piping Installation Checks 83

8.4 Other Installation Checks 83

9 Initial Start up Checks andCommissioning ProcedureforWarrantyInspection 85

10 Maintenance 87

10.1 Filters 88

10.1.1 Filter Replacement for Downflow Units 88

10.1.2 Filter Replacement for Upflow Units 89

10.2 Blower Drive System—EC Fans 91

10.2.1 Protective Features 92

10.2.2 Fan Impellers and Bearings Maintenance 92

10.2.3 Fan Assembly Troubleshooting 92

10.2.4 Removing EC Fans from Downflow Units 96

10.2.5 Removing EC Fans from Upflow Units 100

10.3 Blower Drive System—Forward Curved Blowers 103

10.3.1 Upflow Motor Access 104

10.3.2 Belt Removal 104

10.3.3 Belt Installation and Tensioning 105

10.3.4 Blower Bearing Maintenance 106

10.3.5 Blower Bearing Inspection 106

10.3.6 Blower Bearing Replacement 106

10.3.7 Blower Motor 106

10.3.8 Blower Motor Lubrication 106

10.3.9 Blower Wheel 106

10.4 Infrared Humidifier Maintenance 107

10.4.1 Cleaning Humidifier Pan and Float Switch 107

10.4.2 Changing Humidifier Lamps 108

10.5 Condensate Drain and Condensate Pump System Maintenance 109

Vertiv | Liebert® DS ™ In staller/User Guide

10.5.1 Condensate Drain 109

10.5.2 Condensate Pump 109

10.6 Air Cooled Condenser and Drycooler Maintenance 110

10.7 Electric Reheat Maintenance 110

10.8 Thermostatic Expansion Valve (TXV) Maintenance 110

10.8.1 Determining Suction Superheat 110

10.8.2 Adjusting Superheat Setting with the TXV 110

10.9 Compressor Maintenance 111

10.9.1 Compressor Oil 111

10.9.2 Scroll and Digital Scroll Compressor Maintenance 111

10.9.3 Semi-Hermetic Compressor Maintenance 112

10.9.4 Replacement Compressors 112

10.9.5 Rotalock Valve on Scroll and Digital-Scroll Compressors 112

10.9.6 Unloading Solenoids on a Digital Scroll Compressor 113

10.9.7 Compressor Electrical Failure (Motor Burnout) 113

10.9.8 Replacing a Compressor with Electrical Failure (MotorBurnout) 114

10.9.9 Compressor Mechanical Failure 115

10.9.10 Replacing a Compressor with Mechanical Failure 115

10.10 Motorized Ball Valve (MBV) Maintenance (Digital Scroll Compressors) 115

10.10.1 MBV Control 116

10.10.2 MBV Control Method 116

10.10.3 MBV Adjustment 116

10.10.4 MBV Start-up 116

10.10.5 MBV Location 116

10.10.6 MBV Manual Control 116

10.11 Facility Fluid and Piping Maintenance forWaterandGlycolSystems 116

10.12 Glycol Solution Maintenance 117

10.13 Paradenser™—Water Cooled Condenser Maintenance 117

10.13.1 Cleaning the Paradenser 117

10.13.2 Water Regulating Valves Maintenance forSemi-HermeticandStandard ScrollCompressors 118

10.14 Drycooler Aquastat Settings 119

11 Preventive Maintenance Checklist 121

Appendices 127

Appendix A: Technical Support and Contacts 127

Appendix B: Disassembling the DS for Transport 129

Appendix C: Submittal Drawings 139

iii

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Vertiv | Liebert® DS ™ In staller/User Guide

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®DS. 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, optional disconnect switch is inside the unit. The line side of this switch contains live high-voltage. The only way to ensure that there is NO voltage inside the unit is to install and open a remote disconnect switch. Refer to unit electrical schematic. Follow all local codes.

WARNING! Risk of electric shock. Can cause equipment damage, injury or death. Open all local and remote electric power supply disconnect switches and verify with a voltmeter that power is off before working within any electric connection enclosures. Service and maintenance work must be performed only by properly trained and qualified personnel and in accordance with applicable regulations and manufacturers’ specifications. Opening or removing the covers to any equipment may expose personnel to lethal voltages within the unit even when it is apparently not operating and the input wiring is disconnected from the electrical source.

WARNING! Risk of electric shock. Can cause serious injury or death. The Liebert® iCOM microprocessor does not isolate power from the unit, even in the "Unit Off" mode. Some internal components require and receive power even during the "unit off" mode of the Liebert® iCOM control. Open all local and remote electric power disconnect switches and verify with a voltmeter that power is Off before working on any component of the system.

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

1 Important Safety Instructions

WARNING! Risk of electric shock. Can cause injury or death. Open all local and remote electric power-supply disconnect switches and verify that power is Off with a voltmeter before working within the condensate pump electrical connection enclosure. The Liebert® iCOM™ does not isolate power from the unit, even in the “Unit Off” mode. Some internal components require and receive power even during the “Unit Off” mode of the Liebert®iCOM.

WARNING! Risk of over-pressurization of the refrigeration system. Can cause explosive discharge of highpressure refrigerant, loss of refrigerant, environmental pollution, equipment damage, injury, or death. This unit contains fluids and gases under high pressure. Use extreme caution when charging the refrigerant system. Do not pressurize the system higher than the design pressure marked on the unit's nameplate. For systems requiring EU CE compliance (50Hz), the system installer must provide and install a pressure relief valve in the high side refrigerant circuit that is rated same as the refrigerant high side “Max Allowable Pressure” rating that is marked on the unit serial tag. Do not install a shutoff valve between the compressor and the field installed relief valve. The pressure relief valve must be CE-certified to the EU Pressure Equipment Directive by an EU “Notified Body.”

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

WARNING! Risk of improper moving. Can cause equipment damage, injury or death. Use only lifting equipment that is rated for the unit weight by an OSHA-certified rating organization. The center of gravity varies depending on the unit size and selected options. The slings must be equally spaced on either side of the center of gravity indicator. Shipping weights and unit weights are listed in the tables in Table 2.3 on page18. Use the center of gravity indicators on the unit to determine the position of the slings.

WARNING! Risk of improper piping installation, leak checking, fluid chemistry and fluid maintenance can cause equipment damage and personal injury. 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.

Vertiv | Liebert® DS ™ In staller/User Guide

WARNING! Risk of contact with high-speed rotating fan blades. Can cause serious injury or death. Open all local and remote electric power-supply disconnect switches, verify with a voltmeter that power is off, and verify that all fan blades have stopped rotating before working in the unit cabinet or on the fan assembly. If control voltage is applied, the fan motor can restart without warning after a power failure. Do not operate the unit with any or all cabinet panels removed. Do not operate upflow units without installing a plenum, duct work or guard over the blower opening(s) on the top surface of the unit cabinet. Ductwork must be connected to the blower(s), or a plenum must be installed on the blower deck for protection from rotating blower wheel(s) on upflow units.

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 Table 2.3 on page18

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

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

WARNING! Risk improper drive-belt removal. Can cause the spring-loaded motor base to slam down suddenly causing serious injury to hands and fingers from crushing and pinching. Read the directions in this manual and on the unit instruction labels, keep hands and fingers away from pinch points, and wear appropriate, OSHA-approved PPE when performing maintenance on the belts, motors or pulleys. Follow all directions when servicing the unit.

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

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

1 Important Safety Instructions

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

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

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

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

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

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

Vertiv | Liebert® DS ™ In staller/User Guide

NOTICE

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.

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

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

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

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

NOTICE

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

Liebert®DS 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 20psig (138kPa). Operation for extended periods at less than 20psig (138kPa) can cause premature compressor failure.

1 Important Safety Instructions

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 piping-system corrosion and freezing fluids. Can cause leaks resulting in equipment and expensive building damage. Cooling coils, heat exchangers and piping systems are at high risk of freezing and premature corrosion. Fluids in these systems must contain an inhibitor to prevent premature corrosion.

The system coolant fluid must be analyzed by a competent fluid-treatment specialist before start up to establish the inhibitor level and evaluated at regularly scheduled intervals throughout the life of the system to determine the pattern of inhibitor depletion. The fluid complexity and variations of required treatment programs make it extremely important to obtain the advice of a competent and experienced fluid-treatment specialist and follow a regularly scheduled coolant-fluid system-maintenance program.

Fluid chemistry varies greatly as do the required additives, called inhibitors, that reduce the corrosive effect of the fluids on the piping systems and components.

The chemistry of the coolant fluid used must be considered, because some sources may contain corrosive elements that reduce the effectiveness of the inhibited formulation. Sediment deposits prevent the formation of a protective oxide layer on the inside of the coolant system components and piping. The coolant fluid must be treated and circulating through the system continuously to prevent the buildup of deposits and/or growth of bacteria. Proper inhibitor maintenance must be performed to prevent corrosion of the system.

Consult fluid manufacturer for testing and maintenance of inhibitors.

Commercial-grade coolant fluid is generally less corrosive to the common metals of construction than water itself. It will, however, assume the corrosivity of the coolant fluid from which it is prepared and may become increasingly corrosive with use if not properly inhibited.

Vertiv recommends installing a monitored fluid-detection system that is wired to activate the automaticclosure of field-installed coolant-fluid supply and return shut-off valves to reduce the amount of coolant-fluid leakage and consequential equipment and building damage. The shut-off valves must be sized to close-off against the maximum coolant-fluid system pressure in case of a catastrophic fluid leak.

Vertiv | Liebert® DS ™ In staller/User Guide

NOTICE

Risk of frozen pipes and corrosion from improper coolant mixture. Can cause water leaks resulting in equipment and building damage.

When the cooling unit or piping may be exposed to freezing temperatures, charge the system with the proper percentage of glycol and water for the coldest design ambient temperature. Automotive antifreeze is unacceptable and must NOT be used in any glycol fluid system. Use only HVAC glycol solution that meets the requirements of recommended industry practices. Do not use galvanized pipe.

Risk of a catastrophic water circuit rupture. Can cause expensive building and equipment damage.

Install an overflow drain pan under the unit with a monitored leak detection system in the pan and shutoff valves in the supply and return water lines that automatically close if water is detected by the leak detection system. The shutoff valves should be spring return and must be rated for a close-off pressure that is the same as or higher than the supply water pressure. If it is not possible to install an overflow drain pan, then a monitored leak detection system should be installed in the base of the unit or under the unit to actuate the shutoff valves immediately on a leak detection signal.

The overflow drain pan should have a drain line connected to it that flows to a floor drain or maintenance sink in case of a shutoff valve or leak detection system malfunction.

Risk of no-flow condition. Can cause equipment damage. Do not leave the water/coolant fluid-supply circuit in a no-flow condition. Idle fluid allows the collection of sediment that prevents the formation of a protective oxide layer on the inside of tubes. Keep unit switched On and water/coolant fluid-supply circuit system operating continuously.

NOTICE

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

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

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

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

Sagging condensate drain lines may inadvertently create an external trap.

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.

1 Important Safety Instructions

NOTICE

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

NOTICE

Risk of improper storage. Can cause unit damage.

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

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

Vertiv | Liebert® DS ™ In staller/User Guide

2 NOMENCLATURE AND COMPONENTS

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

2.1 Liebert DS Model Number Nomenclature

Table 1.2 below describes each digit of the model number.

Table 1.1 DS Model Number Example

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

D S 0 3 5 A D A 1 E I * * * *

Table 1.2 DS Model Number Digit Definitions

Digit Description

Digits 1 and 2 = Airflow Distribution

DS = Downflowstandard

VS = Upflow standard

Digit3, 4, 5 = Nominal Cooling Capacity, kW

035 = 35 kW, 10 ton

042 = 42 kW, 12 ton

053 = 53 kW, 15 ton

070 = 70 kW, 20 ton

077 = 77 kW, 22 ton

105 = 10 5 kW, 30 ton

Digit6 = Cooling Type

A = Air-cooled

D = Dual-cool, air-cooled

H = Dual-cool, water-cooled

K = GLYCOOL™ (Liebert®Economizer Coil)

W = Water/Glycol-cooled

Digit7 = Compressor Type

D = Digital scroll, R-407C

S = Scroll, R-407C

U = Semi-hermetic with 4-step, R-407C

V = Sem i-hermetic with 4-step, R-407C

(DS105 water/glycol/GLYCOOL-only)

2 Nomenclature an d Components

Table 1.2 DS Model Number Digit Definitions (continued)

Digit Description

Digit8 = 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

Digit9 = Fan Type

0 = Forward-curved blowers

1 = Electronically-commutated (EC) fans

Digit10 = Reheat Type

0 = None

E = 3-stage electric

Digit11 = Humidifier

0 = No humidifier

I = Infrared Humidifier

Digit12-15 = Factory Configuration Number

Not all combinations of options are available on all units:

• Digital Scroll Compressors

• Not available on VS042A with forward-curved blower

• Not available on 077 and 105 models

• 575-V available only on 035, 053 and 070 models

• Scroll Compressors

• Available on air cooled models 035–105

• Available on water/glycol models 035–070

• Scroll compressors not available on 77- and 105-kW models for water/glycol/GLYCOOL/DualCool units

• GLYCOOL Liebert® Econ-O-Coil™ Models

• Available with digital-scroll compressors on 035 to 070 models, and with semi-hermetic compressors on 077 to 105 models

• High Pressure Water Regulating Valve

• Not available on 042, 053, 070 and 077 models with semi-hermetic and scroll compressors

Vertiv | Liebert® DS ™ In staller/User Guide

2.2 Component Location

The unit component locations are described in the submittal documents included in the Submittal Drawings on page139

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

Table 1.3 Component-location Drawings

Docu ment Number Title

DPN003706 Component Location, Downflow Models

DPN003707 Component Location, Upflow Models

2 Nomenclature an d Components

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Vertiv | Liebert® DS ™ In staller/User Guide

3 PRE-INSTALLATION PREPARATIONANDGUIDELINES

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

Refer to DS Model Number Digit Definitions on page9, and submittal drawings to determine the type of system being installed and anticipate building alterations, piping and duct work needed.

The unit dimensions, pipe-connection locations, and piping schematics are described in the submittal documents included in the Submittal Drawings on page139.

• Verify that the floor is level, solid and sufficient to support the unit. See Liebert DS Downflow Unit weights and

Shipping Weights—Approximate on page18 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® DS 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139.

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

Table 2.1 Dimension Planning Drawings

Docu ment Number Title

Downflow Units

DPN003643 CabinetDimensional Data, 35 to 105 kW (10 to 30 Tons) All Blower Types

UpflowUnits

DPN003681 Cabinet Dimensional Data Upflow 35-105kW (10-30 Tons) Models with EC Fans

DPN003646 Cabinet Dimensional Data Upflow 35 to 105 kW (10-30 Tons) with Forward Curved Blower

Floor Stands

DPN003240 Floor Stand Dimensional Data 35kW - 42kW (10-12 Tons) with EC Fans

DPN003173 Floor Stand Dimensional Dta 53kW - 77 kW (15-22 Tons) with EC Fans

DPN003174 Floor StandDimensional Data 105 kW (30 Tons) Models withEC Fans

DPN003134

Floor Stand and Floor Planning Dimensional Data Upflow 35-42 kW (10-12 Tons)Models with Forward Curved B lowers

3 Pr e-inst allation Preparationand Guidelin es

Table 2.1 Dimension Planning Drawings (continued)

Docu ment Number Title

DPN003141

DPN003149

Blower Outlet, Deck and Filter Box

DPN001120 Blower Outlet a nd Deck Dimensional Data Upflow 35-42 kW (10-12 Tons) with Forward Curved Blowers

DPN001191 Blower Outlet and Deck Dimensional Data Upflow 53-77kW (15-22) Tons with Forward Curved Blowers

DPN001192 B lower Outlet a nd Deck Dimensional Data Upflow 1 05kW (30 Tons)with Forward Curved Blowers

DPN001196

DPN003974

Plenums

DPN003164 Upflow P lenum Dimensional Data 35kW-105kW (10-30 Tons)Models with Foward Curved Blowers

DPN003458 Plenum Dimensional Data Upflow35-42kW (10-12 Tons)Models with EC Fans

DPN003453 P lenum Dimensional Data Upflow 53-77kW (15-22 Tons)with EC Fans

DPN003459 Plenum Dimensional Data Upflow 105kW (30 Tons) Models with EC Fans

Floor Stand and Floor Planning Dimensional Data Upflow 53-77 kW (15-22 Tons)Models with Forward Curved B lowers

Floor Stand and Floor Planning Dimensional Data Upflow 1 05kW (30 Tons) Models with Forward Curved Blowers

Rear Return Filter Box Dimensional Data Upflow 35-105kW (10-30 Tons)All CompressorModels with ForwardCurved Blowers

Rear Return Filter Box Dimensional Data Upflow 35-105kW (10-30 Tons)with EC Fans All Compressor Models

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.

Vertiv | Liebert® DS ™ In staller/User Guide

Figure 2.1 Downflow Unit Ducting and Plenum Ducting

Item Description

1 Field-fabricated duct work.

Field service access for filter replacement.

Minimum height = 1 2in. (305mm)

Minimum distance from unit= 2in. (51mm)

3 Optional Liebert® plenum with service-access doorfor filter replacement.

4 Direct-to-unit ducting

5 Plenum ducting

3 Pr e-inst allation Preparationand Guidelin es

3.3 Air Distribution Considerations for Upflow Units

Various configurations are available:

• Front return

• Rear return

• Top-front supply (forward-curved blowers)

• Top-rear supply (forward-curved blowers)

• Top, rear, and front supply with plenum (EC fans)

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

Upflow rear-return configurations use a filter box attached to the back of the unit. Allow 25in. (635mm) on one side of the unit for access to the rear-return filter box. Refer to the rear-return installation sheet, inside the rear-return filter box package.

Figure 2.2 Upflow Ducting Configurations (Forward Curved Blowers)

Item Description

1 Typical ducting

2 Straightsections must be 1.5 to 2. 5 times the longest blower dimension.

3 Front of unit

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

Vertiv | Liebert® DS ™ In staller/User Guide

Figure 2.3 Upflow Ducting Configurations for EC Fans

Item Description

1 Typical ducting. May run to either side.

2 Straight section must be 2.5 times the depth of blower.

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

NOTE: Follow standard practices in all duct work.

3.4 Connections and System Setup

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

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

Line Requirements on page32, for details.

• Plan the routing of wiring, piping and duct work to the unit. Refer to the appropriate piping connection location drawings, piping schematics, and electrical-connection drawings for your system in Submittal Drawings on page139.

• Water/glycol and GLYCOOL units utilizing a drycooler may require an optional aquastat setting. See Table 9.7

on page119, and Table 9.8 on page119, through Table 9.10 on page120, for drycooler aquastat setting guidelines. Applications with the optional stat setting require field piping to be insulated to prevent condensation.

• 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.

3 Pr e-inst allation Preparationand Guidelin es

3.5 Operating Conditions

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

3.5.1 Cooling, Humidification and Dehumidification

Return air to the unit must be no cooler than the ASHRAE recommendation of 68°F (20°C) DB and 40% RH or minimum WB of 54°F (12.2°C) for proper unit operation. Operating below this can decrease equipment reliability.

3.5.2 Heating

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

3.6 Shipping Dimensions andUnitWeights

Table 2.2 Liebert DS Shipping Dimensions—Domestic and Export

Cooling Type Compressor Type

035/042 053/070/077 105

LxWxH, in. (mm ) LxWxH, in. (mm ) LxWxH, in. (mm )

Air, Dual-Cool Air

Air, Dual-Cool Air Semi-hermetic —

Water/Glycol, GLYCOOL/Dual-Cool Water

Scroll or Digitalscroll

Semi-hermetic —

90x42x82

(2286x1067x2083)

90x42x82

(2286x1067x2083)

102x42x82

(2591x1067x2083

114x42x82

(2896x1 067x2083)

114x42x82

(2896x1 067x2083)

114x42x82

(2896x1 067x2083)

136x42x82

(3454x1 067x2083)

136x42x82

(3454x1 067x2083)

—

136x42x82

(3454x1 067x2083)

Table 2.3 Liebert DS Downflow Unit weights and Shipping Weights—Approximate

Down flow D ownflow Shippin g Weights, lb (kg)

Model Number Compressor Type Cooling Type EC Fan Unit Weight, lb (kg) Dom estic, lb (kg) Export, lb (kg)

Air-cooled 1470 (668) 1608 (730) 1778 (807)

DS035-042 Scroll or Digital-scroll

DS053 Scroll or Digital-scroll

Dual Cool Air 1620 (736) 1758 (798) 1928 (875)

Water/Glycol 1780 (809) 1918 (870) 2088 (948)

GLYCOOL/Dual Cool Water 1930 (877) 2068 (939) 2238 (1016)

Air-cooled 1920 (871) 2070 (939) 2260 (1026)

Dual Cool Air 2100 (953) 2250 (1021) 2440 (1107 )

Water/Glycol 2220 (1010) 2382 (1081) 2582 (1172)

GLYCOOL/Dual Cool Water 2400 (1091) 2562 (1163) 2762 (1253)

Vertiv | Liebert® DS ™ In staller/User Guide

Table 2.3 Liebert DS Downflow Unit weights and Shipping Weights—Approximate (continued)

Down flow D ownflow Shippin g Weights, lb (kg)

Model Number Compressor Type Cooling Type EC Fan Unit Weight, lb (kg) Dom estic, lb (kg) Export, lb (kg)

Air-cooled 1970 (894) 2120 (962) 2310 (1048)

DS070 Scroll or Digital-scroll

Standard Scroll*

DS077

Semi-hermetic

Standard Scroll*

DS105

Semi-hermetic

Dual Cool Air 2150 (975) 2300 (1044) 2490 (1130)

Water/Glycol 2270 (1032) 2432 (1104) 2632 (1194)

GLYCOOL/Dual Cool Water 2450 (1114) 2612 (1185) 2812 (1276)

Air-cooled 2020 (916) 2170(985) 2360 (1071)

Dual Cool Air 2200 (998) 2350 (1066) 2540 (1153)

*Digital-scroll not available.

Air-cooled 2450 (1114) 2612 (1185) 2812 (1276)

Dual Cool Air 2630 (1196) 27 92 (1267) 2992 (1358)

Water/Glycol 2750 (1250) 2912 (1321) 31 12 (1412)

GLYCOOL/Dual Cool Water 2930 (1332) 3092 (1403) 3292 (1494)

Air-cooled 2660 (1207) 3103 (1408) 3323 (1508)

Dual Cool Air 301 5 (1368) 3463 (1571) 3683 (1671)

*Digital-scroll not available.

Air-cooled 2780 (1261) 3223 (1462) 3443 (1562)

Dual Cool Air 3135 (1422) 3583 (1626) 3803 (1726)

Water/Glycol 3150 (1429) 3593 (1630) 3813 (1730)

GLYCOOL/Dual Cool Water 3505 (1590) 3953 (1794) 4173 (1893)

Table 2.4 Liebert DS Upflow Unit Weights and Shipping Weights—Approximate

Model Number Compressor Type Cooling Type EC Fan Unit Weight, lb (kg)

VS035-042 Scrollor Digital-scroll

VS053 Scroll or Digital-scroll

3 Pr e-inst allation Preparationand Guidelin es

Upflow

Forward-Cu rved

Unit Weight, lb (kg)

Upflow Shipping Weights, lb (kg)

w/Forward-curved Blowers

Dom estic, lb (kg) Export, lb (kg)

Air-cooled 1370 (621) 1520 (689) 1658 (753) 1828 (830)

Dual Cool Air 1520 (689) 1670 (758) 1808 (821) 1978 (898)

Water/Glycol 1680 (762) 1830 (830) 1968 (893) 2138 (970)

GLYCOOL/Dual Cool Water 1830 (830) 1 980 (898) 2118 (961) 2288 (1038)

Air-cooled 1900 (862) 2070 (939) 2220 (1007) 2410 (1094)

Dual Cool Air 2080 (943) 2250 (1021 ) 2400 (1089) 2590 (117 5)

Water/Glycol 2200 (998) 2370 (1075) 2532 (1149) 27 32 (1240)

GLYCOOL/Dual Cool Water 2380 (1080) 2550 (1157) 2712 (1231) 2912 (1321)

Table 2.4 Liebert DS Upflow Unit Weights and Shipping Weights—Approximate (continued)

Upflow

Upflow Shipping Weights, lb (kg)

w/Forward-curved Blowers

Model Number Compressor Type Cooling Type EC Fan Unit Weight, lb (kg)

Air-cooled 1900 (862) 2070 (939) 2220 (1007) 2410(1094)

Dual Cool Air 2080 (943) 2250 (1021 ) 2400 (1089) 2590 (117 5)

VS070 Scroll or Digital-scroll

Water/Glycol 2200 (998) 2370 (1075) 2532 (1149) 27 32 (1240)

GLYCOOL/Dual Cool Water 2380 (1080) 2550 (1157) 2712 (1231) 2912 (1321)

Air-cooled 1900 (862) 2070 (939) 2220 (1007) 2410 (1094)

Standard Scroll*

*Digital-scroll not available.

Air-cooled 2330 (1057 ) 2500 (1134) 2662 (1208) 2862 (1299)

VS077

Dual Cool Air 2510 (1139) 2680 (1216) 2842 (1290) 3042 (1380)

Semi-hermetic

Water/Glycol 2630 (1193) 2800 (1270) 2962 (1344) 3162 (1435)

GLYCOOL/Dual Cool Water 2810 (1275) 2980 (1352) 3142 (1426) 3342 (1516)

Air-cooled 2640 (11 97) 2880 (1306) 3063 (1390) 3283 (1490)

Standard Scroll*

*Digital-scroll not available.

Air-cooled 27 60 (1252) 3000 (1361) 3183 (1444) 3403 (1544)

VS105

Dual Cool Air 3090 (1402) 3330 (1510) 3513 (1594) 3733 (1694)

Semi-hermetic

Water/Glycol 3130 (1420) 337 0 (1529) 3553 (1612) 37 73 (171 2)

Forward-Cu rved

Unit Weight, lb (kg)

Dom estic, lb (kg) Export, lb (kg)

GLYCOOL/Dual Cool Water 3460 (1569) 3700 (1678) 3883 (1762) 4103 (1862)

Vertiv | Liebert® DS ™ In staller/User Guide

4 EQUIPMENT INSPECTION AND HANDLING

WARNING! 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 Insp ection and Hand lin g

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 12ft (3.7m) or more from the unit while it is being moved.

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

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

Figure 3.1 Center of Gravity Indicator

Vertiv | Liebert® DS ™ In staller/User Guide

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

3.2 below.

2. Remove the corner and side packaging planks, exposing the bag over the unit.

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.

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

Figure 3.2 Unpacking the Unit

Item Description

1 Remove exterior wrap from unit

2 Remov e corner a nd side packaging planks

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

4.3.1 Removing the Unit from the Skid with a Forklift

Refer to Figure 3.3 on the next page.

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

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

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

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

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

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

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

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

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

4 Equipment Insp ection and Hand lin g

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

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

Figure 3.3 Removing From Skid with a Forklift

Item Description

1 Align forklift with front or rear of unit.

2 Insert tines c ompletely under base of unit.

3 Remove lag bolts and brackets

4 Lift unit and remove 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 3.4 on the facing page.

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

Vertiv | Liebert® DS ™ In staller/User Guide

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