Liebert Precision Cooling System DS User Manual

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Precision Cooling For Business-Critical Continuity™

Liebert® DS

User Manual 28-105kW, 8-30 Tons, Upflow and Downflow, 50/60Hz

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TABLE OF CONTENTS

IMPORTANT SAFETY INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

SAVE THESE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.0 LIEBERT DS COMPONENTS AND NOMENCLATURE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

2.0 COOLING CONFIGURATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

3.0 PRE-INSTALLATION GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

3.1 Room Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.2 Air Distribution—Downflow Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3.3 Air Distribution—Upflow Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.4 Connections and System Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.5 Operating Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.0 LIEBERT DS DIMENSIONS AND WEIGHTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

5.0 EQUIPMENT INSPECTION AND HANDLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

5.1 Packaging Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

SAFETY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

5.2 Unpacking the Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

5.2.1 Removing the Unit from the Skid With a Forklift . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

5.2.2 Moving the Unit to the Installation Location with Piano Jacks . . . . . . . . . . . . . . . . . . . . . . . 38

5.2.3 Removing Piano Jacks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

5.2.4 Removing Liebert DS from Skid Using Rigging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

5.3 Semi-Hermetic Compressor Spring Isolation System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

5.4 Placing the Unit on a Floor Stand. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

6.0 DISASSEMBLING THE LIEBERT DS FOR TRANSPORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42

6.1 Required Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

6.2 Disassembly—Downflow Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

6.2.1 Remove the Compressor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.2.2 Remove the Filter and Electric Box Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

6.3 Reassembly—Downflow Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

6.3.1 Reconnecting Piping, Charging and Replacing Panels. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

6.4 Reassembly Checklist. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

6.5 Disassembly—Upflow Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

6.5.1 Remove Compressor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

6.5.2 Remove Blower and Electric Box Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

6.6 Reassembly—Upflow Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

6.7 Reassembly Checklist. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

7.0 ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

7.1 Electrical Field Connection Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

8.0 PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72

8.1 Fluid Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

8.1.1 Condensate Piping—Field-Installed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

8.1.2 Humidifier Supply Water—Optional Infrared . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

8.1.3 Requirements of Systems Using Water or Glycol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

8.2 Refrigeration Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

8.2.1 Piping Guidelines—Air-Cooled Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

8.3 Dehydration/Leak Test and Charging Procedures for R-407C and R-22 . . . . . . . . . . . . . . . 78

8.3.1 Air-Cooled Condenser with Fan Speed Head Pressure Control System . . . . . . . . . . . . . . . . . 78

8.3.2 Air-Cooled Condenser with Lee-Temp “Flooded Condenser” Head Pressure Control System 80

9.0 PIPING SCHEMATICS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82

10.0 CHECKLIST FOR COMPLETED INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

10.1 Moving and Placing Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

10.2 Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

10.3 Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

10.4 Other . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107

11.0 INITIAL STARTUP CHECKS AND COMMISSIONING PROCEDURE FOR WARRANTY INSPECTION . . 108

11.1 Information for Warranty Inspection—Remove Power From Unit Disconnect . . . . . . . . . 109

11.2 Startup Checks Inspection With Panels Removed and Disconnect Off. . . . . . . . . . . . . . . . 109

11.3 Commissioning Procedure With Panels On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

12.0 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

12.1 Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

12.1.1 Filter Replacement Procedure—Downflow Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

12.1.2 Filter Replacement Procedure—Upflow Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

12.2 Blower Drive System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

12.2.1 Upflow Motor Access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

12.2.2 Belt Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

12.2.3 Belt Installation and Tensioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

12.3 Humidifier. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

12.3.1 Infrared Humidifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

12.3.2 Cleaning Humidifier Pan and Float Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

12.3.3 Changing Humidifier Lamps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

12.4 Condensate Drain and Condensate Pump Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

12.4.1 Condensate Drain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

12.4.2 Condensate Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116

12.5 Air-Cooled Condenser and Drycoolers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

12.6 Reheat—Electric Reheat (Three-Stage and SCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

12.7 Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

12.7.1 Compressor Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

12.7.2 Semi-Hermetic Compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

12.7.3 Scroll and Digital Scroll Compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

12.8 Compressor Replacement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

12.8.1 Compressor Motor Burnout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

12.8.2 Digital Compressor Unloading Solenoid(s) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

12.8.3 Compressor Replacement Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

12.9 Facility Fluid and Piping Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118

12.10 Paradenser—Water-Cooled Condenser. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

12.10.1 Cleaning Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

12.11 Water/Glycol Control Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

12.11.1 Regulating Valves – Semi Hermetic and Standard Scroll Compressors. . . . . . . . . . . . . . . . 119

12.11.2 Motor Ball Valve—Digital Scroll Compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

12.11.3 Drycooler Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

13.0 HVAC MAINTENANCE CHECKLIST. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .122

iii

FIGURES

Figure 1 Downflow model component locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Figure 2 Upflow model component locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Figure 3 Liebert DS model number nomenclature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 4 Downflow unit ducting and plenum ducting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 5 Upflow ducting configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Figure 6 Cabinet and floor planning dimensions—downflow, air-cooled, 28-42kW (8-12 ton),

semi-hermetic compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Figure 7 Cabinet and floor planning dimensions—downflow, air-cooled, 28-42kW (8-12 ton),

scroll compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Figure 8 Cabinet and floor planning dimensions—downflow, water/glycol/GLYCOOL,

28-42kW (8-12 ton), all compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Figure 9 Cabinet and floor planning dimensions—downflow, air-cooled, 53-77kW (15-22 ton),

semi-hermetic compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 10 Cabinet and floor planning dimensions—downflow, air-cooled, 53-77kW (15-22 ton),

scroll compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Figure 11 Cabinet and floor planning dimensions—downflow, water/glycol/GLYCOOL,

53-77kW (15-22 ton), all compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 12 Cabinet and floor planning dimensions—downflow, air-cooled, 105kW (30 ton),

all compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 13 Cabinet and floor planning dimensions—downflow, water/glycol/GLYCOOL, 105kW (30 ton),

all compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Figure 14 Cabinet and floor planning dimensions—upflow, air-cooled 28-42kW (8-12 ton),

semi-hermetic compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Figure 15 Cabinet and floor planning dimensions—upflow, air-cooled 28-42kW (8-12 ton),

scroll or digital scroll compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 16 Cabinet and floor planning dimensions—upflow, water/glycol/GLYCOOL,

28-42kW (8-12 ton), all compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Figure 17 Cabinet and floor planning dimensions—upflow, air-cooled, 53-77kW (15-22 ton),

semi-hermetic compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 18 Cabinet and floor planning dimensions—upflow, air-cooled, 53-77kW (15-22 ton),

scroll or digital scroll compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Figure 19 Cabinet and floor planning dimensions—upflow, water/glycol/GLYCOOL,

53-77kW (15-22 ton), all compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 20 Cabinet and floor planning dimensions—upflow, air-cooled, 105kW (30 ton), all . . . . . . . . . . . . 25

Figure 21 Cabinet and floor planning dimensions—upflow water/glycol/GLYCOOL 105kW (30 ton),

all compressors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Figure 22 Floor stand dimensions—downflow, 28-42kW (8-12 ton) models. . . . . . . . . . . . . . . . . . . . . . . . . . 27

Figure 23 Floor stand dimensions—downflow, 53-77kW (15-22 ton) models. . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 24 Floor stand dimensions—downflow, 105kW (30 ton) models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 25 Blower outlet and deck dimensions—upflow, 28-42kW (8-12 ton). . . . . . . . . . . . . . . . . . . . . . . . . 30

Figure 26 Blower outlet and deck dimensions—upflow, 53-77kW (15-22 ton). . . . . . . . . . . . . . . . . . . . . . . . 31

Figure 27 Blower outlet and deck dimensions—upflow 105kW (30ton) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Figure 28 Rear return filter box dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Figure 29 Upflow unit plenum dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Figure 30 Equipment recommended for handling Liebert DS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 31 Removing packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

Figure 32 Remove the unit from the skid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Figure 33 Moving the unit to its installation location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Figure 34 Locate center of gravity marker and place slings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Figure 35 Using rigging to lift Liebert DS off skid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Figure 36 Setting the unit on a floor stand . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Figure 37 Component dimensions—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Figure 38 Component dimensions—downflow, air-cooled, 28-42kW (8-12 ton), scroll/digital scroll

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Figure 39 Component dimensions—downflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton),

all compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Figure 40 Component dimensions—downflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Figure 41 Component dimensions—downflow air-cooled, 53-77kW (15-22 ton), scroll/digital

scroll compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Figure 42 Component dimensions—downflow water/glycol, GLYCOOL, 53-77kW (15-22 ton),

all compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Figure 43 Component dimensions—downflow, air-cooled, 105kW (30 ton), semi-hermetic compressor

models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

Figure 44 Component dimensions—downflow, air-cooled, 105kW (30 ton), scroll compressor models . . . . 54

Figure 45 Component dimensions—downflow, water/glycol/GLYCOOL, 105kW (30 ton), all

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Figure 46 Component dimensions—upflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressor

models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Figure 47 Component dimensions—upflow, air-cooled, 28-42kW (8-12 ton), scroll/digital scroll

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Figure 48 Component dimensions—upflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton), all

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Figure 49 Component dimensions—upflow, air-cooled, 53-77kw (15-22 ton), semi-hermetic

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Figure 50 Component dimensions—upflow, air-cooled, 53-77kw (15-22 ton), scroll/digital scroll

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Figure 51 Component dimensions—upflow water/glycol/GLYCOOL 53-77kw (15-22 ton), all

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Figure 52 Component dimensions—upflow, air-cooled, 105kW (30 ton), semi-hermetic compressor

models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Figure 53 Component dimensions—upflow, air-cooled, 105kW (30 ton), scroll/digital scroll

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Figure 54 Component dimensions—upflow, water/glycol/GLYCOOL, 105kW (30 ton), all

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Figure 55 Electrical field connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Figure 56 Gravity drain for downflow and upflow units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Figure 57 Piping schematic—air-cooled, semi-hermetic compressor models . . . . . . . . . . . . . . . . . . . . . . . . . 82

Figure 58 Piping schematic—air-cooled, scroll compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Figure 59 Piping schematic—water/glycol, semi-hermetic compressor models . . . . . . . . . . . . . . . . . . . . . . . 84

Figure 60 Piping schematic—water/glycol with scroll compressor models. . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Figure 61 Piping schematic—GLYCOOL semi-hermetic compressor models . . . . . . . . . . . . . . . . . . . . . . . . 86

Figure 62 Piping schematic—GLYCOOL with scroll compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . 87

Figure 63 Piping schematic—water/glycol with digital scroll compressor models . . . . . . . . . . . . . . . . . . . . . 88

Figure 64 GLYCOOL with digital scroll compressor models. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

Figure 65 Optional piping schematic for Econ-O-Coil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90

Figure 66 Primary connection locations—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Figure 67 Primary connection locations—downflow, air-Cooled, 28-42kW (8-12 ton) with scroll

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Figure 68 Primary connection locations—downflow water/glycol/GLYCOOL 28-42kW (8-12 ton),

all compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93

Figure 69 Primary connection locations—downflow, air-Cooled, 53-77kW (15-22 ton), semi-hermetic

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 94

Figure 70 Primary connection locations—downflow, air-Cooled, 53-77kW (15-22 ton) with scroll

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95

Figure 71 Primary connection locations—downflow, water/glycol/GLYCOO,L 53-77kW (15-22 ton),

all compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 96

Figure 72 Primary connection locations—downflow, air-cooled, 105kW (30 ton), all compressor models . . 97 Figure 73 Primary connection locations—downflow, air-cooled, 105kW (30 ton), all compressor models . . 98 Figure 74 Primary connection locations—upflow, air-cooled, 28-42kw (8-12 ton), semi-hermetic

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99

Figure 75 Primary connection locations—upflow, air-Cooled, 28-42kW (8-12 ton), semi-hermetic

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100

Figure 76 Primary connection locations—upflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton),

all compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 101

Figure 77 Primary connection locations—upflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102

Figure 78 Primary connection locations—upflow, air-cooled, 53-77kW (15-22 ton), scroll compressor

models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103

Figure 79 Primary connection locations—upflow, water/glycol/GLYCOOL, 53-77kW (15-22 ton),

all compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 104

Figure 80 Primary connection locations—upflow, air-cooled, 105kW (30 ton), all. . . . . . . . . . . . . . . . . . . . 105

Figure 81 Primary connection locations—upflow, water/glycol/GLYCOOL, 105kW (30 ton), all . . . . . . . . 106

Figure 82 Proper filter pleat direction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112

Figure 83 Upflow motor access . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113

Figure 84 Auto-belt tensioning motor base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114

Figure 85 Correct orientation of float switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115

TABLES

Table 1 Shipping dimensions—domestic and export, inches (mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Table 2 Shipping weights—approximate, kg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Table 3 Weights for downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressor models . . . . . 11

Table 4 Weights for downflow, air-cooled, 28-42kW (8-12 ton), scroll compressor models . . . . . . . . . . . . 12

Table 5 Weights for downflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton), all compressor models . . . 13

Table 6 Weights for downflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic compressor models . . . . 14

Table 7 Weights for downflow, air-cooled, 53-77kW (15-22 ton), scroll compressor models . . . . . . . . . . . 15

Table 8 Weights for downflow, water/glycol/GLYCOOL, 53-77kW (15-22 ton), all compressor models . . 16

Table 9 Weights for downflow, air-Cooled, 105kW (30 ton), all compressor models . . . . . . . . . . . . . . . . . 17

Table 10 Weights for downflow, water/glycol/GLYCOOL, 105kW (30 ton), all compressor models . . . . . . 18

Table 11 Weight for upflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressor models . . . . . . . . 19

Table 12 Weight for upflow, air-cooled, 28-42kW (8-12 ton), scroll or digital scroll compressor models . . 20

Table 13 Weights for upflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton), all compressor models . . . . . 21

Table 14 Weights for upflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic compressor models . . . . . . 22

Table 15 Weight for upflow, air-cooled, 53-77kW (15-22 ton), scroll or digital scroll compressor models . 23

Table 16 Weights for upflow, water/glycol/GLYCOOL, 53-77kW (15-22 ton), all compressor models . . . . 24

Table 17 Weights—upflow, air-cooled, 105kW (30 ton), all . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 18 Weights—upflow water/glycol/GLYCOOL 105kW (30 ton), all compressors. . . . . . . . . . . . . . . . . 26

Table 19 Floor stand and floor planning dimensions—downflow, 28-42kW (8-12 ton) models . . . . . . . . . . 27

Table 20 Floor stand and floor planning dimensions—downflow, 53-77kW (15-22 ton) models . . . . . . . . . 28

Table 21 Floor stand and floor planning dimensions—downflow, 105kW (30 ton) models . . . . . . . . . . . . . 29

Table 22 Dimensions for upflow, 28-42kW (8-12 ton) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Table 23 Blower outlet and deck dimensions for upflow, 53-77kW (15-22 ton) . . . . . . . . . . . . . . . . . . . . . . 31

Table 24 Blower outlet and deck dimensions—upflow 105kW (30ton) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Table 25 Rear return filter box dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Table 26 Upflow unit plenum dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

Table 27 Component weights—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic . . . . . . . . . . . . . 47

Table 28 Component weights—downflow, air-cooled, 28-42kW (8-12 ton), scroll/digital scroll. . . . . . . . . . 48

Table 29 Component weights—downflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton), all . . . . . . . . . . . 49

Table 30 Component weights—downflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic . . . . . . . . . . . . 50

Table 31 Component weights—downflow, air-cooled, 53-77kW (15-22 ton), scroll/digital scroll. . . . . . . . . 51

Table 32 Component weights—downflow water/glycol, GLYCOOL, 53-77kW (15-22 ton), all . . . . . . . . . . 52

Table 33 Component weights—downflow, air-cooled, 105kW (30 ton), semi-hermetic compressors. . . . . . 53

Table 34 Component weights—downflow, air-cooled, 105kW (30 ton), scroll compressor models . . . . . . . 54

Table 35 Component weights—downflow, water/glycol/GLYCOOL, 105kW (30 ton), all compressor

models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Table 36 Component weights—upflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressor

models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Table 37 Component weights—upflow, air-cooled, 28-42kW (8-12 ton), scroll/digital scroll compressor

models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60

Table 38 Component weights—upflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton), all compressor

models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Table 39 Component weights—upflow air-cooled 53-77kw (15-22 ton), semi-hermetic compressor

models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Table 40 Component weights—upflow, air-cooled, 53-77kw (15-22 ton), scroll /digital scroll

compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Table 41 Component weights—upflow water/glycol/GLYCOOL, 53-77kW (15-22 ton) all compressor

models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Table 42 Component weights—upflow, air-cooled, 105kW (30 ton), semi-hermetic compressor models . . 65

vii

Table 43 Component weights—upflow, air-cooled, 105kW (30 ton), scroll/digital scroll compressor

models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Table 44 Component weights—upflow, water/glycol/GLYCOOL, 105kW (30 ton), all compressor

models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Table 45 Recommended refrigerant line sizes - OD copper (inches)* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Table 46 Indoor unit approximate refrigerant charge for R-22 or R-407C . . . . . . . . . . . . . . . . . . . . . . . . . . 76

Table 47 Line charges - refrigerant per 100 ft (30m) of Type “L” copper tube . . . . . . . . . . . . . . . . . . . . . . . 77

Table 48 Outdoor condenser approximate refrigerant charge lb (kg) per circuit . . . . . . . . . . . . . . . . . . . . . 77

Table 49 Fan speed suction pressure transducer settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

Table 50 Lee-Temp suction pressure transducer settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Table 51 Piping data—upflow, air-cooled 105kW (30 ton), all. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

Table 52 Piping data—upflow, upflow, water/glycol/GLYCOOL, 105kW (30 ton), all . . . . . . . . . . . . . . . . 106

Table 53 Filter quantities, downflow units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Table 54 Filter quantities, upflow units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111

Table 55 Compressor oil types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117

Table 56 Recommended refrigerant pressures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119

Table 57 Water/glycol system conditions requiring optional settings for aquastats . . . . . . . . . . . . . . . . . 121

Table 58 Aquastat settings—two-fan through four-fan drycoolers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Table 59 Aquastat settings—six-fan drycoolers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

Table 60 Aquastat settings—eight-fan drycoolers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121

viii

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 operate this unit.

Only qualified personnel should move, install or service this equipment.

Adhere to all warnings, cautions and installation, operating and safety instructions on the unit and in this manual. Follow all operating and user instructions.

WARNING

Risk of electric shock. Can cause injury or death.

Disconnect local and remote power supplies before working within.

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 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 iCOM control.

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 explosive discharge from high-pressure refrigerant. Can cause injury or death.

This unit contains fluids and gases under high pressure. Relieve pressure before working with piping.

™

. Read this manual thoroughly before attempting to install or

WARNING

Risk of refrigerant system rupture or explosion from overpressurization. Can cause equipment damage, injury or death.

If a pressure relief device is not provided with the condenser unit, the system installer must provide and install a discharge pressure relief valve rated for a maximum of 500 psig (34bar) in the high side refrigerant circuit. Do not install a shutoff valve between the compressor and the field installed relief valve.

One or more additional pressure relief valves are required downstream of any and all fieldinstalled isolation valves as shown in Figures 57 and 58. Do not isolate any refrigerant circuits from overpressurization protection.

For systems requiring EU CE compliance (50Hz), the pressure relief valve must be CE certified to the EU Pressure Equipment Directive by an EU “Notified Body.”

NOTE

A pressure relief valve is provided with Liebert Lee-Temp provided on Liebert Fan Speed Control condensers. The Liebert indoor cooling unit has a factory-installed high pressure safety switch in the high side refrigerant circuit.

™

condensers. A fusible plug is

WARNING

Risk of high-speed moving parts. Can cause injury or death.

Disconnect all local and remote electric power supplies before working in the unit.

Do not operate upflow units without installing a plenum, ductwork 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.

CAUTION

Risk of contact with hot surfaces. Can cause injury.

The compressors, refrigerant discharge lines, humidifiers and reheats are extremely hot during unit operation. Allow sufficient time for them to cool before working within the unit cabinet. Use extreme caution and wear protective gloves and arm protection when working on or near hot compressors, discharge lines, humidifiers and reheats.

CAUTION

Risk of leaking water. Can cause equipment and building damage.

This unit requires a water drain connection. It may also require an external water supply to operate.

Improper installation, application and service practice can result in water leakage from the unit. Water leakage can result in severe property damage and loss of critical data center equipment.

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

Emerson recommends installing leak detection equipment for unit and supply lines.

1.0 LIEBERT DS COMPONENTS AND NOMENCLATURE

Figure 1 Downflow model component locations

Liebert DS Components and Nomenclature

1. iCOM Control Display

2. Electric Box

3. Filters

4. Evaporator Coil

5. Motor

6. Blower

7. Fan Pulley

8. Motor Sheave and Belts

9. Compressor Section

10. Infrared Humidifier, optional

11. Disconnect, optional

12. Condensate Pump, optional

13. Smoke Sensor, optional

14. Condenser Cleanout Plugs, fluid-cooled units only

15.Condenser Drain Plugs, fluid-cooled units only

16. Econ-O-Coil Valve, GLYCOOL/Dual Cooling

DPN000958 Rev. 1

Figure 2 Upflow model component locations

Liebert DS Components and Nomenclature

1. iCom Control Display

2. Electric Box

3. Filters

4. Evaporator Coil

5. Motor

6. Blower

7. Fan Pulley

8. Motor Sheave and Belts

9. Compressor Section

DPN001222 Rev. 0

10. Infrared Humidifier (optional)

11. Disconnect (optional)

12. Condensate Pump (optional)

13. Smoke Sensor (optional)

14. Condenser Cleanout Plugs (fluid cooled units only)

15. Condenser Drain Plugs ( fluid cooled units only)

16. Econ-O-Coil Valve (GLYCOOL/Dual Cooling)

Figure 3 Liebert DS model number nomenclature

Liebert DS Components and Nomenclature

D2S30

Air Distribution

DS = Downflow Standard VS = Upflow Standard

Nominal kW

028,035, 042, 053, 070, 077, 105

Cooling Type

A = Air-Cooled D = Dual-Cooling, Air-Cooled W = Water/Glycol K = GLYCOOL H = Dual-Cooling (Water/Glycol)

Compressor

U - Semi-hermetic with four-step, R-407C S - Scroll, R-407C D - Digital Scroll, R-407C M - Semi-hermetic

with four-step, R-22 R - Scroll, R-22 G - Digital Scroll, R-22

355

Voltage

A - 460/3/60 B - 575/3/60 C - 208/3/60 D - 230/3/60 2 - 380/3/60

A90

10311I12*13*14*15

Factory Configuration Number

Humidification

0 - None I - Infrared S - Steam Generating

Canister

Reheat Type

0 - None E - Three-stage

electric S - SCR W - Hot water

Rev Level

= Rev 0

J - 200/3/50 M - 380-415/3/50

2.0 COOLING CONFIGURATIONS

NOTE

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

Cooling Configurations

Air-Cooled Air-cooled unit piping is spun closed from the factory and contain a nitrogen holding charge. Each installation requires refrigerant piping to a condenser.

GLYCOOL GLYCOOL units are factory-charged and tested. Field-installed piping is required from the unit to the drycooler and pump package. An additional coil is included for use when fluid

emperatures are sufficiently low (below room temperature).

Cooling is provided by circulating cold glycol through this

econd coil, reducing compressor operation.

Glycol-cooled units are factory-charged and tested. Field-installed piping is required from the unit to the drycooler and pump package.

Glycol-Cooled

Water-Cooled Water-cooled units are factory-charged and tested. Field-installed water piping is required from the unit to the cooling tower.

Dual-Cool This system has all of the features of a compressorized system, but adds a second cooling coil that is connected to a source of chilled water. Cooling is provided by circulating water through this second coil and reducing compressor operation.

3.0 PRE-INSTALLATION GUIDELINES

3.1 Room Preparation

• Verify that the floor is level, solid and sufficient to support the unit. See Table 2 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 Liebert DS units 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 Figures 6 through 21 for dimensions.

• Emerson recommends installing an under-floor water detection system. Contact your local Emerson representative for information.

3.2 Air Distribution—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" (191mm) of clearance.

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

• Optional plenums are available for downflow unit ducting.

Pre-Installation Guidelines

Figure 4 Downflow unit ducting and plenum ducting

Field-Fabricated Ductwork

Field Service Access for filter replacement (minimum height of

Provided Condenser Access (water, glycol and GLYCOOL units only)

DIRECT UNIT DUCTING

Provided Condenser Access (water, glycol and GLYCOOL units only)

12" [305mm]; minimum distance from unit, 2" [51mm])

Optional Liebert Plenum

Field-Fabricated Ductwork

Provided Service Access Door for filter replacement

Liebert Plenum - Refer to plenum installation sheet 186582P1 included in the plenum package.

PLENUM DUCTING

3.3 Air Distribution—Upflow Units

Various configurations are available:

• Front return

• Rear return

•Top-front supply

• Top-rear supply

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 Liebert DS. Allow 25" (635 mm) on one side of the unit for access to the rear return filter box. Refer to the rear return installation sheet, 187230P1, inside the rear return filter box package.

WARNING

Risk of high-speed moving parts. Can cause injury or death. Disconnect all local and remote electric power supplies before working in the unit. Do not operate upflow units without installing a plenum, ductwork 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.

Pre-Installation Guidelines

Figure 5 Upflow ducting configurations

Straight section of duct off of unit to be 1.5 to 2.5 times the longest blower dimension. Typical ducting shown; ducting may run to either side.

* Follow standard practices on all duct work.

NOTE

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

DPN001156 Rev. 0

3.4 Connections and System Setup

• Plan the routing of wiring, piping and ductwork to the unit. See Figure 55 and Figures 66 through 79 for unit connection locations.

• Water/glycol and GLYCOOL units utilizing a drycooler may require an optional aquastat setting. See Tables 58 through 57 aquastat setting guidelines. Applications with the optional stat setting require field piping to be insulated to prevent condensation.

• The unit requires a drain, which must comply with all applicable codes. This drain line may contain boiling water. See 8.1.1 - Condensate Piping—Field-Installed 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.

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

3.5 Operating Conditions

• The Liebert DS must be operated in a conditioned space within the operating envelope ASHRAE recommends for data centers: Maximum temperature of 77°F (25°C) DB and 55% RH or maximum WB of 65.5°F (18.6°C).

Operating outside this envelope can decrease equipment reliability.

• 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.

Pre-Installation Guidelines

Refer to ASHRAE’s publication, “Thermal Guidelines for Data Processing Environments.”

4.0 LIEBERT DS DIMENSIONS AND WEIGHTS

Table 1 Shipping dimensions—domestic and export, inches (mm)

028/035/ 042 053/070/ 077 105

Model Number

DS/VSAS, DS/VSAD, DS/VSAR, DS/VSAG, DS/VSDS, DS/VSDD, DS/VSDR, DS/VSDG

DS/VSAU, DS/VSAM, DS/VSDU, DS/VSDM DS/VSWS, DS/VSWD, DS/VSWR, DS/VSWG

DS/VSHS, DS/VSHD, DS/VSHR, DS/VSHG DS/VSWU, DS/VSWM, DS/VSHU, DS/VSHM

Table 2 Shipping weights—approximate, kg

Size

8-12 Ton

15 Ton

20 Ton

22 Ton

30 Ton

Cooling

Type

Air

Air D/C

W/G

G/C

Air

Air D/C

W/G

G/C

Air

Air D/C

W/G

G/C

Air

Air D/C

W/G

G/C

Air

Air D/C

W/G

G/C

Compressor

Type

Semi 1918 2088 1968 2138 Scroll 1608 1778 1658 1828 Semi 2068 2238 2118 2288 Scroll 1758 1928 1808 1978 Semi 2068 2238 2118 2288 Scroll 1918 2088 1968 2138 Semi 2218 2388 2268 2438 Scroll 2068 2238 2118 2288 Semi 2512 2712 2512 2712 Scroll 2070 2260 2220 2410 Semi 2692 2892 2692 2892 Scroll 2250 2440 2400 2590 Semi 2812 3012 2812 3012 Scroll 2382 2582 2532 2732 Semi 2992 3192 2992 3192 Scroll 2562 2762 2712 2912 Semi 2562 2762 2662 2862 Scroll 2120 2310 2220 2410 Semi 2742 942 2842 3042 Scroll 2300 2490 2400 2590 Semi 2862 3062 2962 3162 Scroll 2432 2632 2532 2732 Semi 3042 3242 3142 3342 Scroll 2612 2812 2712 2912 Semi 2612 2812 2662 2862 Scroll 2170 2360 2220 2410 Semi 2792 2992 2842 3042 Scroll 2350 2540 2400 2590 Semi 2912 3112 2962 3162 Scroll 2470 2660 2532 2732 Semi 3092 3292 3142 3342 Scroll 2650 2840 2712 2912 Semi 3223 3443 3183 3403 Scroll 3103 3323 3063 3283 Semi 3583 3803 3513 3733 Scroll 3463 3683 3393 3613 Semi 3593 3813 3553 3773 Scroll 3473 3693 3433 3653 Semi 3953 4173 3883 4103 Scroll 3833 4053 3763 3983

LxW x H, in (mm) Lx W xH, in (mm) Lx W x H, in (mm)

90x42 x 82

(2286x1067 x 2083)

Downflow Unit Weight, lb Upflow Unit Weight, lb

Domestic Export Domestic Export

Liebert DS Dimensions and Weights

102x42 x 82

(2591x 1067 x 2083

136x 42x82

114x42x82

(2896x1067 x 2083)

(3454x1067 x 2083)

Liebert DS Dimensions and Weights

Figure 6 Cabinet and floor planning dimensions—downflow, air-cooled, 28-42kW (8-12 ton),

semi-hermetic compressor models

econdary Refrigerant

Piping Entrance

Opening

Notes:

24-3/8"

(619mm)

Secondary Entrance Low Volt Connections

Opening

3/4"

(19mm)

Bezels

Filters are accessible through top of unit onl y.

Downflow electrical connections can be made from top or bottom of unit.

Minimum clearance required for filter replacement

33"

(838mm)

35"

(889mm)

Secondary Entrance High Volt Connection(s)

56-7/8"

(1445mm)

Air Inlet Opening

Top View

86"

(2184mm)

76"

(1930mm)

34"

(864mm)

DPN000795 Rev. 3

(51mm)

Shaded areas indicate a recommended minimum clearance for component access.

Front View

85"

(2159mm)

Table 3 Weights for downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressor models

Dry Weight - lb. (kg),

Approximate

Model No.

Air-Cooled 1780 (809)

Dual-Cool 1930 (877)

028, 035, 042

15"

(381mm)

Liebert DS Dimensions and Weights

Figure 7 Cabinet and floor planning dimensions—downflow, air-cooled, 28-42kW (8-12 ton), scroll

compressor models

Secondary Refrigerant

Piping Entrance

56-7/8"

(1445mm)

Opening

Notes: Filters are accessible through top of unit only. Downflow electrical connections can be made

24-3/8"

from top or bottom of unit.

(619mm) Opening

3/4"

Bezels

(838mm)

35"

(889mm)

33"

Air Inlet Opening

(19mm)

Minimum required

for filter replacement

Secondary Entrance

High Volt Connection(s)

Top View

Secondary Entrance

Low Volt Connections

73"

(1854mm)

76"

(1930mm)

34" (864mm)

Shaded area indicates a recommended minimum clearance for component

(51mm)

Table 4 Weights for downflow, air-cooled, 28-42kW (8-12 ton), scroll compressor models

Dry Weight, lb (kg),

Approximate

Model No. 028, 035, 042

Air-Cooled 1470 (668)

Dual-Cool 1620 (736)

Front View

72"

(1829mm)

access.

DPN000796 Rev. 2

15"

(381mm)

Liebert DS Dimensions and Weights

Figure 8 Cabinet and floor planning dimensions—downflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton),

all compressor models

Condenser Cleanout Access

33"

(838mm)

35"

(889mm)

Secondary Condenser Fluid Piping Entrance

Secondary Entrance

High Volt Connection(s)

56-7/8"

(1445mm)

Air Inlet Opening

Top View

86"

(2184mm)

Opening

Secondary Entrance Low Volt Connections

24-3/8"

(619mm)

Opening

Notes: Filters are accessible through top of unit only. Downflow electrical connections can be made from top or bottom of unit.

Bezels

3/4"

(19mm)

Required for

condenser cleanout

24"

(610mm)

Minimum required

for filter replacement

(381mm)

15"

76"

(1930mm)

34" (864mm)

Shaded area indicates a recommended minimum clearance for component

(51mm)

Front View

85" (2159mm)

access.

DPN000894 Rev. 3

Table 5 Weights for downflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton), all compressor models

Dry Weight - lb. (kg),

Approximate

Compressor Type

Semi-Hermetic Compressor

Scroll or Digital Scroll Compressor

Model 028, 035, 042

Water/Glycol 1930 (877)

GLYCOOL/Dual-Cool 2080 (945)

Water/Glycol 1780 (809)

GLYCOOL/Dual-Cool 1930 (877)

Liebert DS Dimensions and Weights

Figure 9 Cabinet and floor planning dimensions—downflow, air-cooled, 53-77kW (15-22 ton),

semi-hermetic compressor models

Second Refrigerant Piping Entrance

33"

(838mm)

35"

(889mm)

80"

Opening

(2032mm)

Air Inlet Opening

24-3/8"

(619mm)

Notes: Filters are accessible through top of unit only. Downflow electrical connections can be made

Opening

from top or bottom of unit.

3/4"

Bezels

(19mm)

Secondary Entrance High Volt Connection(s)

76"

(1930mm)

(51mm)

Top View

109"

(2769mm)

Front View

108"

(2743mm)

Secondary Entrance Low Volt Connections

Shaded area indicates a recommended minimum clearance for component access.

Minimum required

for filter replacement

15"

(381mm)

34"

(864mm)

DPN000924

Rev. 2

Table 6 Weights for downflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic compressor models

Dry Weight, lb (kg) Approximate

Model

Air-Cooled 2350 (1069) 2400 (1091) 2450 (1114)

Dual-Cool 2530 (1150) 2580 (1173) 2630 (1196)

053 070 077

Liebert DS Dimensions and Weights

Figure 10 Cabinet and floor planning dimensions—downflow, air-cooled, 53-77kW (15-22 ton), scroll

compressor models

Secondary Refrigerant Piping Entrance

33"

(838mm)

35"

(889mm)

Secondary Entrance High Volt Connection(s)

76"

(1930mm)

Opening

80"

(2032mm)

Air Inlet Opening

Top View

98"

(2489mm)

Notes: Filters are accessible only through top of unit. Downflow electrical connections can be made from top or bottom of unit.

24-5/8"

(625mm

Opening

(19mm) Bezels

Secondary Entrance Low Volt Connections

3/4"

Minimum required

for filter replacement

15"

(381mm)

(864mm)

(51mm)

97"

(2464mm)

Front View

Shaded area indicates a recommended minimum clearance for component access.

DPN000925 Rev. 1

Table 7 Weights for downflow, air-cooled, 53-77kW (15-22 ton), scroll compressor models

Dry Weight, lb (kg) Approximate

Model No.

Air-Cooled 1920 (873) 1970 (896) 2020 (919)

Dual-Cool 2100 (955) 2150 (978) 2200 (1000)

053 070 077

34"

Liebert DS Dimensions and Weights

Figure 11 Cabinet and floor planning dimensions—downflow, water/glycol/GLYCOOL, 53-77kW

(15-22 ton), all compressor models

Condenser Cleanout Access

80" (2032mm)

Opening

(838mm)

35"

(889mm

76"

(1930mm)

33"

Secondary Condenser Fluid Piping Entrance

Secondary Entrance High Volt Connection(s)

Air Inlet Opening

TOP VIEW

109"

(2769mm)

24-5/8" (625mm)

Opening

Secondary Entrance Low Volt Connections

(610mm)

Notes: Filters are accessible through top of unit only. Downflow electrical connections can be made from top or bottom of unit.

3/4" (20mm)

Bezels

Required for

condenser cleanout

24"

Minimum required for filter replacement

15"

(381mm)

34"

(864mm)

DPN000931 Rev. 3

(51mm)

FRONT VIEW

108"

(2743mm)

Shaded area indicates a recommended minimum clearance for component access.

Table 8 Weights for downflow, water/glycol/GLYCOOL, 53-77kW (15-22 ton), all compressor models

Compressor

Type Model

Semi-Hermetic Compressor

Scroll or Digital Scroll Compressor

Water/Glycol 2650 (1205) 2700 (1228) 2750 (1250)

GLYCOOL/Dual-Cool 2830 (1287) 2880 (1310) 2930 (1332)

Water/Glycol 2220 (1010) 2270 (1032) 2320 (1055)

GLYCOOL/Dual-Cool 2400 (1091) 2450 (1114) 2500 (1137)

Dry Weight, lb (kg), Approximate

053 070 077

Liebert DS Dimensions and Weights

Figure 12 Cabinet and floor planning dimensions—downflow, air-cooled, 105kW (30 ton), all compressor

models

(838mm)

35"

(889mm)

76"

(1930mm)

33"

Second Refrigerant Piping Entrance

102-13/16"

(2611mm)

Air Inlet Opening

Top View

Secondary Entrance High Volt Connection(s)

132"

(3353mm)

Opening

Secondary Entrance Low Volt Connections

Notes: Filters are accessible only through top of unit. Downflow electrical connections can be made from top or bottom of unit.

24-3/8"

(619mm)

Opening

3/4"

Bezels

(19mm)

Minimum required

for filter replacement

15"

(381mm)

Shaded area indicates a recommended minimum

Front View

131"

clearance for component access.

(3327mm)

Table 9 Weights for downflow, air-Cooled, 105kW (30 ton), all compressor models

Dry Weight, lb (kg) approximate

Compressor Type

Semi-Hermetic Compressor

Scroll Compressor

Model 105

Air-Cooled 3040 (1382)

Dual-Cool 3400 (1545)

Air-Cooled 2920 (1327)

Dual-Cool 3280 (1491)

34" (864mm)

DPN001012

Rev. 2

Liebert DS Dimensions and Weights

Figure 13 Cabinet and floor planning dimensions—downflow, water/glycol/GLYCOOL, 105kW (30 ton), all

compressor models

(838mm)

35"

(889mm)

76"

(1930mm)

33"

Secondary Condenser Fluid Entrance

Condenser Cleanout Access

102-13/16"

(2611mm)

Air Inlet Opening

Top View

Secondary Entrance High Volt Connection(s)

132"

(3353mm)

Opening

Notes: Filters are accessible only through top of unit. Downflow electrical connections can be made from top or bottom of unit.

24-3/8"

(619mm)

Secondary Entrance Low Volt Connections

24"

(610mm)

Opening

3/4"

(19mm)

Bezels

Required for

condenser cleanout

Minimum required

for filter replacement

15"

(381mm)

Front View

131"

(3327mm)

Shaded area indicates a recommended minimum clearance for component access.

DPN001013

Table 10 Weights for downflow, water/glycol/GLYCOOL, 105kW (30 ton), all compressor models

Dry Weight, lb (kg) approximate

Compressor Type

Semi-Hermetic Compressor

Scroll Compressor

Model 105

Water/Glycol 3410 (1550)

GLYCOOL/Dual-Cool 3770 (1714)

Water/Glycol 3290 (1495)

GLYCOOL/Dual-Cool 3650 (1659)

34"

(864mm)

Rev. 2

Liebert DS Dimensions and Weights

Figure 14 Cabinet and floor planning dimensions—upflow, air-cooled 28-42kW (8-12 ton), semi-hermetic

compressor models

33"

(838mm)

35"

(889mm)

High Volt Connection(s)

1-1/2"

(38mm)

Alternate Re Piping Entrance

(2184mm)

rigerant

Top View

86"

(19mm)

Bezels

Low Volt Connection(s)

3/4"

Minimum required

for blower replacement

24"

(610mm)

76"

(1930mm)

34"

(864mm) Shaded area indicates a recommended minimum clearance for component access.

(51mm)

Front View

85"

(2159mm)

Note: Front air return unit shown. For rear return unit, in addition to front service area shown, also include 25" (635mm) on one side of unit for access to rear return filter box. See DPN001196, Figure 28.

DPN001162

Table 11 Weight for upflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressor models

Dry Weight, lb (kg)

approximate

Model No.

Air-Cooled 1830 (830)

Dual-Cool 1980 (898)

028-042

Rev. 1

Liebert DS Dimensions and Weights

Figure 15 Cabinet and floor planning dimensions—upflow, air-cooled 28-42kW (8-12 ton), scroll or digital

scroll compressor models

Alternate Refrigerant Piping Entrance

33"

(838mm)

35"

(889mm)

3/4"

(19mm)

Bezels

High Volt Connection(s)

1-1/2"

(38mm)

76"

(1930mm)

(51mm)

TOP VIEW

73"

(1854mm)

FRONT VIEW

72"

(1829mm)

Low Volt Connection(s)

Shaded area indicates a recommended minimum clearance for component access.

Minimum required

for blower replacement

24"

(610mm)

34"

(864mm)

DPN001163

Rev. 1

Table 12 Weight for upflow, air-cooled, 28-42kW (8-12 ton), scroll or digital scroll compressor models

Dry Weight, lb (kg)

approximate

Model No.

Air-Cooled 1520 (689)

Dual-Cool 1670 (758)

028-042

Liebert DS Dimensions and Weights

(

Figure 16 Cabinet and floor planning dimensions—upflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton), all

compressor models

33"

(838mm)

35"

(889mm)

Alternate Refrigerant Piping Entrance

High Volt Connection(s)

1-1/2"

(38mm)

ondenser Cleanout Access

TOP VIEW

86"

(2184mm)

(19mm) Bezels

Low Volt Connection(s)

3/4"

Required for

condenser cleanout

Minimum required

for blower replacement

24"

(610mm)

76"

(1930mm)

34"

Shaded area indicates a

(864mm)

recommended minimum clearance for component access.

FRONT VIEW

(51mm)

85"

2159mm)

Table 13 Weights for upflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton), all compressor models

Dry Weight, lb (kg) approximate

Compressor Type

Semi-Hermetic

Scroll or Digital Scroll

GLYCOOL/Dual-Cool 1980 (898)

Model 028-042

Water/Glycol 1980 (898)

GLYCOOL/Dual-Cool 2130 (966)

Water/Glycol 1830 (830)

DPN001164 Rev. 1

Liebert DS Dimensions and Weights

Figure 17 Cabinet and floor planning dimensions—upflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic

compressor models

Alternate Refrigerant Piping Entrance

33"

(838mm)

35"

(889mm)

3/4"

(19mm)

Bezels

Minimum required

for blower replacement

Top View

Low Volt Connection(s)

24"

(610mm)

1-1/2"

(38mm)

High Volt Connection(s)

109"

(2769mm)

76"

(1930mm)

34"

(864mm)

Shaded area indicates a recommended minimum clearance for component access.

DPN001165 Rev. 1

(51mm)

108"

(2743mm)

Front View

Table 14 Weights for upflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic compressor models

Dry Weight, lb (kg)

approximate

Model

053 070, 077

Air-Cooled 2350 (1069) 2500 (1134)

Dual

-Cool 2530 (1150) 2680 (1216)

Liebert DS Dimensions and Weights

Figure 18 Cabinet and floor planning dimensions—upflow, air-cooled, 53-77kW (15-22 ton), scroll or digital

scroll compressor models

Alternate Refrigerant Piping Entrance

33"

(838mm)

35"

(889mm)

3/4"

(19mm)

Minimum required

for blower replacement

Bezels

1-1/2"

(38mm)

76"

(1930mm)

(51mm)

High Volt Connection(s)

Top View

98"

(2489mm)

97"

(2464mm)

Front View

Low Volt Connection(s)

24"

(610mm)

34"

(864mm)

Shaded area indicates a recommended minimum clearance for component access.

DPN001166 Rev. 1

Table 15 Weight for upflow, air-cooled, 53-77kW (15-22 ton), scroll or digital scroll compressor models

Dry Weight, lb (kg) approximate

Model No.

Air-Cooled 2070 (939)

Dual-Cool 2250 (1021)

053, 070, 077

Liebert DS Dimensions and Weights

Figure 19 Cabinet and floor planning dimensions—upflow, water/glycol/GLYCOOL, 53-77kW (15-22 ton),

all compressor models

33"

(838mm)

35"

(889mm)

lternate Condenser

Fluid Piping Entrance

High Volt Connection(s)

Top View

Low Volt Connection(s)

3/4"

(19mm)

Bezels

Required for

condenser cleanout

Minimum required

for blower replacement

1-1/2"

(38mm)

109"

(2769mm)

24"

(610mm)

76"

(1930mm)

34"

(864mm)

Shaded area indicates a recommended minimum

(51mm)

108"

(2743mm)

Front View

clearance for component access.

DPN001167 Rev. 1

Table 16 Weights for upflow, water/glycol/GLYCOOL, 53-77kW (15-22 ton), all compressor models

Dry Weight, lb (kg) approximate

Compressor Type

Semi-Hermetic Compressor

Scroll or Digital Scroll Compressor

Model 053 070, 077

Water/Glycol 2650 (1205) 2800 (1270)

GLYCOOL/Dual-Cool 2830 (1287) 2980 (1352)

Water/Glycol 2370 (1075)

GLYCOOL/Dual-Cool 2550 (1157)

Liebert DS Dimensions and Weights

Figure 20 Cabinet and floor planning dimensions—upflow, air-cooled, 105kW (30 ton), all

Alternate Refrigerant Piping Entrance

33"

(838mm)

35"

(889mm)

1-1/2"

(38mm)

(1930mm)

76"

High Volt Connection(s)

TOP VIEW

132"

(3353mm)

Low Volt Connection(s)

3/4"

(19mm)

Bezels

Minimum required for blower replacement

24" (610mm)

(51mm)

131"

(3327mm)

FRONT VIEW

Note: Front air return unit shown. For rear return unit, in addition to front service area shown, also include 25" (635mm) on one side of unit for access to rear return filter box. See DPN001196.

Table 17 Weights—upflow, air-cooled, 105kW (30 ton), all

Dry Weight, Approximate, lb (kg)

Model 105

Semi- Hermetic, Air-Cooled 3000 (1361)

Semi-Hermetic, Dual-Cool 3330 (1510)

Scroll or Digital Scroll, Air-Cooled 2880 (1306)

Scroll or Digital Scroll, Dual-Cool 3210 (1456)

34"

(864mm)

Shaded area indicates a recommended minimum clearance for component access.

DPN001168 REV 0

Liebert DS Dimensions and Weights

Figure 21 Cabinet and floor planning dimensions—upflow water/glycol/GLYCOOL 105kW (30 ton), all

compressors

Alternate Refrigerant Piping Entrance

33"

(838mm)

35"

(889mm)

Alternate Condenser Fluid Piping Entrance

High Volt Connection(s)

1-1/2"

(38mm)

76"

(1930mm)

3/4"

(19mm)

Bezels

TOP VIEW

Low Volt Connection(s)

132"

(3353mm)

Required for condenser cleanout

Minimum required for blower replacement

24" (610mm)

Shaded area indicates a

(51mm)

Note: Front air return unit shown. For rear return unit, in addition to front service area shown, also include 25" (635mm) on one side of unit for access to rear return filter box. See DPN001196.

131"

(3327mm)

FRONT VIEW

recommended minimum clearance for component access.

Table 18 Weights—upflow water/glycol/GLYCOOL 105kW (30 ton), all compressors

Model 105

Semi-Hermetic Compressor

Scroll or Digital Scroll Compressor

Water/Glycol 3370 (1529)

GLYCOOL/Dual-Cool 3700 (1678)

Water/Glycol 3250 (1474)

GLYCOOL/Dual-Cool 3580 (1624)

34"

(864mm)

DPN001169 REV 0

Figure 22 Floor stand dimensions—downflow, 28-42kW (8-12 ton) models

A+1-1/2"

(38mm) (with feet)

47-15/16"

(1218mm)

4-1/2"

(114mm)

Liebert DS Dimensions and Weights

33"

(838mm)

34-1/2"

(876mm)

(with feet)

(25mm) TYP.

Gussets supplied on floor stands 12" (305 mm) tall and greater

7/8"

(23mm)

NOTE: Right side of paneled unit is flush with right side of floorstand. All other paneled sides overhang floor stand 1" (25mm). * Leveling feet are provided with ± 1-1/2" (38mm) adjustment from nominal height C.

(76mm)

Turning vane air outlet Optional turning vane can be field-installed in supply air discharge opening for front or rear air discharge.

Supply air discharge opening

16-3/4"

(425mm)

Supply air discharge

opening

Optional turning vane shown as front air discharge.

DPN000820 REV 2

Table 19 Floor stand and floor planning dimensions—downflow, 28-42kW (8-12 ton) models

Dimensions, in. (mm) Height, in. (mm)

Model A B C* D Turning Vane

9 (229) 4 (111) Air-Cooled Semi-Hermetic Models and All Water/Glycol/GLYCOOL Models

Air-Cooled Scroll Models and Air-Cooled Digital Scroll Models

(2159)26(660)

(1829)13(330)

12 (305) 7 (187)

15 (381) 10 (264)

18 (457) 13 (340)

21 (533) 16 (416)

24 (610) 19 (492)

Figure 23 Floor stand dimensions—downflow, 53-77kW (15-22 ton) models

A+1-1/2"

(38mm) (with feet)

69-3/4"

(1772mm)

4-1/2"

(114mm)

Liebert DS Dimensions and Weights

34-1/2"

(876mm)

(with feet)

33"

(838mm)

(25mm) TYP.

Gussets supplied on floor stands 12" (305 mm) tall and greater

Turning vane air outlet Optional turning vane can be field-installed in supply air discharge opening for front or rear air discharge.

NOTE: Right side of paneled unit is flush with right side of floor stand. All other paneled sides overhang floor stand 1" (25mm). * Leveling feet are provided with ± 1-1/2" (38mm) adjustment from nominal height C.

Supply air discharge opening

(76mm)

16-3/4"

(425mm)

7/8"

(23mm)

Optional turning vane shown as front air discharge.

DPN000930 REV 1

Supply air discharge

opening

Table 20 Floor stand and floor planning dimensions—downflow, 53-77kW (15-22 ton) models

Dimensions, in. (mm) Height, in. (mm)

Model A B C* D Turning Vane

9 (229) 4 (111)

Air-Cooled Semi-Hermetic Models and

All Water/Glycol/GLYCOOL Models

Air-Cooled Scroll Models and

Air-Cooled Digital Scroll Models

108

(2743)26(660)

(2464)15(381)

12 (305) 7 (187)

15 (381) 10 (264)

18 (457) 13 (340)

21 (533) 16 (416)

24 (610) 19 (492)

Figure 24 Floor stand dimensions—downflow, 105kW (30 ton) models

132-1/2"

(3366mm) (with feet)

131"

26"

(660mm)

34-1/2"

(876mm)

(with feet)

33"

(838mm)

(3327mm)

(2330mm)

91-3/4"

4-1/2"

(114mm)

16-3/4"

(425mm)

Liebert DS Dimensions and Weights

Supply air

discharge

opening

(25mm) TYP.

Supply air

discharge opening Gussets supplied on floor stands 12" (305 mm) tall and greater

Optional turning vane shown as front air discharge.

7/8"

(23mm)

(76mm) Turning vane air outlet Optional turning vane can be field-installed in supply air discharge opening for front or rear air discharge.

DPN001059 REV 1

Table 21 Floor stand and floor planning dimensions—downflow, 105kW (30 ton) models

Height, in. (mm)

C* D turning vane

9 (229) 4 (111)

12 (305) 7 (187)

15 (381) 10 (264)

18 (457) 13 (340)

21 (533) 16 (416)

24 (610) 19 (492)

Figure 25 Blower outlet and deck dimensions—upflow, 28-42kW (8-12 ton)

Liebert DS Dimensions and Weights

72" (1829mm) or 85" (2159mm ) Ref

Blow er Outlet *

Blower Outlet Location – Top View

Front of Unit

* Duct flange not provided

Table 22 Dimensions for upflow, 28-42kW (8-12 ton)

Models Blower Supply A B C D E

15-7/8"

(404mm)

15-7/8"

(404mm)

15-7/8"

(404mm)

15-7/8"

(404mm)

28-42kW

(8-12 ton)

Front Throw

15 x 15

Rear Throw

Front Throw

15 x 11

Rear Throw

35"

(889 mm)

Ref

18-5/8"

(472mm)

18-5/8"

(472mm)

14-1/2"

(368mm)

14-1/2"

(368mm)

Top of Unit

Blower Deck

1-1/2”

(38mm)

76"

Ref

(1930mm)

Front or Rear Throw Air Supply

DPN001120 Rev. 1

2-1/8"

(54mm)

11-5/8"

(295mm)

2-1/8"

(54mm)

11-5/8"

(295mm)

25-5/8"

(651mm)

25-5/8"

(651mm)

25-5/8"

(651mm)

25-5/8"

(651mm)

25"

(635mm)

25"

(635mm)

25"

(635mm)

25"

(635mm)

Liebert DS Dimensions and Weights

Figure 26 Blower outlet and deck dimensions—upflow, 53-77kW (15-22 ton)

98" (2489mm) or 109" (2769mm)

Blower

Outlets*

Blower Outlet Location – TOP VIEW

35"

(889mm)

Ref

Front of

Unit

* Duct Flanges Not Provided

TOP OF UNIT

1-1/2"

Blower Deck

(38mm)

76"

(1930mm)

Ref

Front or Rear Air Throw Supply

Table 23 Blower outlet and deck dimensions for upflow, 53-77kW (15-22 ton)

Dimensions, in. (mm)

Models Blower Supply

Front

15 x 15

53-77kW

(15-22 ton)

15 x 11

Throw

Rear Throw

Front Throw

Rear Throw

ABCDE F

15-7/8"

(404mm)

15-7/8"

(404mm)

15-7/8"

(404mm)

15-7/8"

(404mm)

18-5/8"

(472mm)

18-5/8"

(472mm)

14-11/16"

(373mm)

14-11/16"

(373mm)

2-1/8"

(54mm)

11-5/8"

(295mm)

2-1/8"

(54mm)

11-5/8"

(295mm)

27-3/4"

(705mm)

27-3/4"

(705mm)

31-3/8"

(797mm)

31-3/8"

(797mm)

DPN001191 Rev. 3

18-5/8"

(472mm)

18-5/8"

(472mm)

14-11/16"

(373mm)

14-11/16"

(373mm)

55"

(1410mm)

55"

(1410mm)

58-7/16"

(1484mm)

58-7/16"

(1484mm)

Figure 27 Blower outlet and deck dimensions—upflow 105kW (30ton)

132" (3353mm)

Liebert DS Dimensions and Weights

Blower

Outlets *

A A A

B B B

Blower Outlet Location – TOP VIEW

* Duct Flanges Not Provided

Top of Unit

Blower Deck

1-1/2"

(38mm)

Front of Unit

35"

(889mm)

Ref

76"

(1930mm)

Ref

Front or Rear Throw Air Supply

Table 24 Blower outlet and deck dimensions—upflow 105kW (30ton)

Dimensions, in. (mm)

Models Blower SUPPLY

Front

105kW

(30 ton)

15 x 11

Throw

Rear

Throw

ABCDE FG

15-7/8

(404)

15-7/8

(404)

14-11/16

(373)

14-11/16

(373)

2-1/8

(54)

11-5/8

(295)

25-5/8

(651)

25-5/8

(651)

DPN001192 Rev. 0

30-3/4

(781)

30-3/4

(781)

54-1/2

(1384)

54-1/2

(1384)

78-1/8 (1984)

Figure 28 Rear return filter box dimensions

Liebert DS Dimensions and Weights

Filter Access Door

7-15/16"

(202mm)

76"

40"

(1930mm)

(1016mm)

38-1/4"

(971mm)

Duct Size

3-1/2"

(89mm)

D Duct Size

NOTES:

1. Filters can be accessed from either side.

2. 25" (635mm) minimum clearance provided on one side for filter access.

3. Filter boxes are shipped flat and must be field assembled.

Filter Access Door

DPN001196 Rev. 0

Table 25 Rear return filter box dimensions

Dimensions, in (mm)

Compressor Type

28-42kW (8-12 ton) Air-Cooled Scroll and Air-Cooled Digital Scroll Models

28-42kW (8-12 ton) Semi-Hermetic and all Water/Glycol/GLYCOOL Models

53-77kW (15-22 ton) Air-Cooled Scroll and Air-Cooled Digital Scroll Models

53-77kW (15-22 ton) Semi-Hermetic and all Water/Glycol/GLYCOOL Models

105kW (30 ton) All Models 2-1/4 (57) 100-1/4 (2546) 29-1/2 (749) 97-1/8 (2467) 8

AB CD# Filters

4-1/4 (108) 50-3/4 (1289) 18 (457) 47-5/8 (1210) 4

4-1/4 (108) 50-3/4 (1289) 31 (787) 47-5/8 (1210) 4

3-1/4 (83) 75-1/2 (1918) 19-1/4 (489) 72-3/8 (1838) 6

3-1/4 (83) 75-1/2 (1918) 30-1/4 (768) 72-3/8 (1838) 6

Figure 29 Upflow unit plenum dimensions

Liebert DS Dimensions and Weights

Front Views – Check One (1):

With Grille

Without Grille

Left Side Views – Check One (1):

(864mm)

With Grille

Without Grille

34"

(25mm)

Panel removable for condenser cleanout access (water/glycol / GLYCOOL models only)

Rear Views – Check One (1):

With Grille

Without Grille

Right Side Views –

Check One (1):

With Grille

76"

(1930mm)

Without Grille

Side View – Unit With Plenum

Front View – Unit With Plenum

Notes:

1. Typical 53-77kW (15-22ton) unit orientation shown with grille plenum . View varies by unit size and plenum selection .

2. All plenums are shipped flat and must be field assembled .

3. Optional grille plenum kits must include front or rear grille .

4. Non-grille plenums are open on the top and not designed with duct flange .

Table 26 Upflow unit plenum dimensions

Plenum Dimensions, in (mm) Grille Size, in (mm) - Nominal

A B H Front/Rear Grilles Side Grille

28-42kW (8-12 ton) Air-Cooled Scroll and Air-Cooled Digital Scroll Models

28-42kW (8-12 ton) Semi-Hermetic and all Water/Glycol/GLYCOOL Models

53-77kW (15-22 ton) Air-Cooled Scroll and Air-Cooled Digital Scroll Models

53-77kW (15-22 ton) Semi-Hermetic and all Water/Glycol/GLYCOOL Models

105kW (30 ton) All Models 105-1/4 (2673) 26-3/4 (679)

59-1/4 (1505) 13-3/4 (349)

59-1/4 (1505) 26-3/4 (679) 18 x 55 (457 x 1397) 18 x 20 (457 x 508)

82-1/4 (2089) 15-3/4 (400)

82-1/4 (2089) 26-3/4 (679) 18 x 78 (457 x 1981) 18 x 20 (457 x 508)

(508)

(610)

(914)

DPN001187

Rev. 0

18 x 55 (457 x 1397) 18 x 20 (457 x 508)

18 x 78 (457 x 1981) 18 x 20 (457 x 508)

(1) 18 x 20 (457 x 508)

(1) 18 x 78 (457 x 1981)

18 x 20 (457 x 508)

5.0 EQUIPMENT INSPECTION AND HANDLING

Upon arrival of the unit and before unpacking it, verify that the labeled equipment matches the bill of lading. Carefully inspect all items for damage, either visible or concealed. For initial access use a 7/32" Allen wrench for panel removal. Damage should be immediately reported to the carrier and a damage claim filed with a copy sent to Emerson Network Power or to your sales representative.

5.1 Packaging Material

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

SAFETY INFORMATION

WARNING

Risk of top-heavy unit falling over. Can cause equipment damage, injury or death.

Read all of the following instructions before attempting to move the unit, lift it, remove packaging or prepare the unit for installation.

CAUTION

Risk of sharp edges, splinters and exposed fasteners. Can cause personal injury.

Only properly trained personnel wearing appropriate safety headgear, gloves, shoes and glasses should attempt to move the unit, lift it, remove packaging or prepare the unit for installation.

Equipment Inspection and Handling

NOTICE

Risk of overhead interference. The unit may be too tall to fit through a doorway while on the skid. Measure the unit and doorway heights and refer to the installation plans to verify clearances prior to moving the unit. If the Liebert DS is too large to fit through doors, halls or other tight spaces, the unit can be partly dismantled as detailed in 6.0 - Disassembling the

Liebert DS for Transport.

NOTICE

Risk of damage from forklift. 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 damage from forklift. 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 Liebert DS upright, indoors and protected from dampness, freezing temperatures and contact damage.

Figure 30 Equipment recommended for handling Liebert DS

Equipment Inspection and Handling

Forklift

If possible, transport the Liebert DS with a forklift or pallet jacks. If that is not possible, use a crane with belts or cables, slings and spreader bars.

• If using a forklift or pallet jack, make sure that the forks (if adjustable) are spread to the widest allowable distance that will fit under the skid.

Ensure the fork length is suitable for the unit length.

• When moving the packaged Liebert DS with a forklift, lift the unit from the designated “heavy side” of the unit no higher than 6" (152mm) off the ground. Ensure that the opposite end still touches the ground.

• The unit is to be pulled by the forklift—If the unit must be lifted higher than 6" (152mm) great care must be exercised: Personnel who are not directly involved in moving the unit must be kept 20' (5m) or farther from the lift point of the unit.

• Always refer to the location of the center of gravity indicators when lifting the Liebert DS (see Figure 34).

5.2 Unpacking the Unit

Remove outer packaging when ready to install the unit.

• Remove the exterior stretch wrap packaging material from around the unit, exposing the protective corner and side packaging planks.

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

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

Pallet Jack

Spreader Bars and Slings

Piano Jacks

Figure 31 Removing packaging

Step 1 Step 2 Step 3

181659P1 Rev. 5

5.2.1 Removing the Unit from the Skid With a Forklift

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

WARNING

Risk of improper moving. Can cause equipment damage, injury or death. Use the center of gravity indicators on the unit to determine the entry points for the tines (see

Figure 34). The center of gravity varies depending on the unit size and selected options. The forklift’s tines must 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 Liebert DS.

WARNING

Risk of improper moving. Can cause equipment damage, injury or death. Ensure that the tines are level, not angled up or down. The tines must be at a height that will allow proper clearance under the unit. Ensure the tines extend beyond the opposite side of the unit.

3. Remove the lag bolts from each bracket holding the Liebert DS to the skid.

4. Lift the unit off the skid—no more than 6" (152mm)—and remove the skid.

Figure 32 Remove the unit from the skid

Step 1 Step 2

Equipment Inspection and Handling

Step 3

Step 4

181659P1 Rev. 5

5.2.2 Moving the Unit to the Installation Location with Piano Jacks

1. With the Liebert DS elevated, place two piano jacks into position—one at either end of the unit.

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

3. Secure the unit to the piano jacks and remove the forklift.

4. Use the piano jacks to move the unit for installation.

Figure 33 Moving the unit to its installation location

Step 1

Step 2

Equipment Inspection and Handling

5.2.3 Removing Piano Jacks

1. Lower the unit as much as the piano jacks will allow.

2. Undo all strapping holding the piano jacks to the unit.

3. Use a pry bar or similar device to lift one end of the unit just enough to allow removal of the piano jack from that end.

4. Repeat Step 3 to remove the piano jack on the opposite end.

5. Remove all material that might have been used to protect the unit from the piano jacks and strapping.

Step 3

181659P1 Rev. 5

5.2.4 Removing Liebert DS from Skid Using Rigging

WARNING

Risk of improper moving. Can cause equipment damage, injury or death. Use the center of gravity indicators (see Figure 34) on the unit to determine the position of

the slings. The center of gravity varies depending on the unit size and selected options.

The forklift’s tines must be equally spaced on either side of the center of gravity indicator.

1. Space the slings equidistant on either side of the center of gravity indicator (see Figure 34).

Figure 34 Locate center of gravity marker and place slings

Equipment Inspection and Handling

Lifting Sling

Illustration shows one possible center of gravity. The center of gravity on the Liebert DS varies with the options and the model’s size.

Equal Distance

2. Place the slings between the bottom rails of the Liebert DS and the top of the skid.

Equal Distance

Lifting Sling

181659P1 Rev. 5

NOTE

Unit is shown without packaging. These instructions may be applied with the outer packaging in place.

3. Use spreader bars or a similar device and padding to ensure the Liebert DS will not be damaged when the unit is lifted. Lifting will force the slings toward the Liebert DS and the slings may damage the unit unless it is properly protected.

4. Remove the lag bolts from the bracket securing the Liebert DS to the shipping skid.

5. Remove the brackets.

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.

6. Lift the Liebert DS off the skid.

7. Move the skid from under the unit.

Figure 35 Using rigging to lift Liebert DS off skid

Lifting Sling

Equipment Inspection and Handling

Lifting Sling

Equal Distance

181659P1 Rev. 5

5.3 Semi-Hermetic Compressor Spring Isolation System

Shipping blocks under all semi-hermetic compressors must be removed and the springs must be adjusted before startup.

1. Loosen nuts at each of the four compressor feet and remove the two shipping blocks.

2. Beginning with one compressor foot, retighten nut until the washer under the nut can no longer be rotated by finger.

3. Loosen the nut half a turn. The washer will be slightly loose.

4. Repeat for remaining feet and recheck all when done

5.4 Placing the Unit on a Floor Stand

Liebert Floor Stand—Ensure that the optional turning vane is installed in the floor stand (if included) prior to placing the unit. Refer to the floor stand installation sheet, 182278P1, located inside the floor stand package. Lower the unit onto the floor stand. Refer to Detail A in Figure 36. Be sure to align the welded tabs on top of the floor stand with the inside of the unit frame base.

Figure 36 Setting the unit on a floor stand

Welded Tab

Equipment Inspection and Handling

DETAIL A

Liebert Floor Stand (front discharge shown)

Upflow rear return configurations use a filter box that attaches to the back of the Liebert DS. Refer to rear return installation sheet, 187230P1, located inside rear-return filter box package.

Disassembling the Liebert DS for Transport

6.0 DISASSEMBLING THE LIEBERT DS FOR TRANSPORT

The Liebert DS 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 on downflow units and for lifting the blower and electric box assembly on upflow units.

WARNING

Risk of explosive discharge from high-pressure refrigerant. Can cause injury or death.

This unit contains fluids and/or gases under high pressure. Relieve pressure before working with piping, compressors or other internal components.

WARNING

Risk of top heavy unit falling over. Improper handling can cause equipment damage, injury, or death.

Read all instructions before attempting to move or lift unit. Installation and service of this equipment should be done only by properly trained and qualified personnel who have been specially trained in the installation of air conditioning equipment.

CAUTION

Risk of sharp edges and heavy parts. Can cause personal injury.

Only properly trained and qualified personnel wearing appropriate safety headgear, gloves, shoes and glasses should attempt to move, lift, remove packaging from or prepare unit for installation.

NOTICE

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 Liebert DS may affect warranty.

6.1 Required Equipment

•Piano jacks

• Stepladder for downflow units

• Refrigeration tools

6.2 Disassembly—Downflow Units

For detailed views of downflow units, see Figures 37 through 45.

1. Remove the unit from its shipping skid before beginning (refer to 5.2 - Unpacking the Unit).

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.

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 deadfront panel for details.

Disassembling the Liebert DS for Transport

NOTICE

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

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

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 Liebert DS.

10. 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 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. Remove the humidifier low-voltage connections 35-5 and 35-6 by disconnecting the

quick-connect plug. 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. GLYCOOL/Dual-Cool—Optional Component

a. On units with an actuator, unplug the valve actuator harness at the actuator and pull the

wire harness into the electric box. b. Disconnect the glycol sensor from the control board and pull it into the unit’s blower and coil

assembly section.

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

15. 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.

16. Close the electric box cover and the accent panel.

17. 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.

18. Evacuate and recover all refrigerant from the Liebert DS. Air-cooled units are shipped with a nitrogen holding charge. Water, glycol and GLYCOOL units

are factory-charged with refrigerant. Refer to 8.0 - Piping for piping guidelines and to the ASHRAE Refrigeration Handbook for general, good-practice refrigeration piping.

NOTICE

Risk of compressor oil contamination with moisture. Emerson recommends 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. This is particularly important with units using R-407C refrigerant.

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

20. 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

Emerson does not recommend unsweating refrigerant connections.

21. Unsweat or cut all copper water pipes that interconnect unit sections.

22. Immediately cap and seal all piping that has been cut, including the suction and liquid lines, as well as the fluid piping on GLYCOOL and dual-cool units.

6.2.1 Remove the Compressor Assembly

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

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 Liebert DS. Do not remove shipping blocks from semi-hermetic compressors until the Liebert DS is fully reassembled and ready for installation.

Disassembling the Liebert DS for Transport

NOTE

Emerson recommends using piano jacks when moving this section.

6.2.2 Remove the Filter and Electric Box Assembly

1. Using a stepladder to reach the top of the Liebert DS, remove the filter support plate; it is attached to the filter and electric box assembly with two screws, one on each end.

2. Remove tags from the Schrader fittings on top of the coil headers. Retain the tags for replacement during reassembly.

3. 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.

4. Remove coil access plates from the left side of the Liebert DS.

5. 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.

6. Separate the unit sections with caution.

NOTICE

Risk of improper handling.

• 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. Emerson recommends 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.

7. Move each section of the Liebert DS to the installation location.

6.3 Reassembly—Downflow Units

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. (25Nm)

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.

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.

11. On GLYCOOL and dual-cool units, reattach the plug connection at the actuator and reroute the sensor wire back through the electric box and onto the control board.

6.3.1 Reconnecting Piping, Charging and Replacing Panels

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 8.0 - Piping 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 Liebert DS 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.

Disassembling the Liebert DS for Transport

6.4 Reassembly Checklist

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

___ 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. Water lines brazed

___ 8. Suction and liquid refrigerant lines brazed

___ 9. Unit recharged

___ 10. Filters replaced

___ 11. Panels replaced

Disassembling the Liebert DS for Transport

Figure 37 Component dimensions—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressor

models

Filter & Electric Box Assembly

39"

(991mm)

Compressor Assembly

Blower & Coil Assembly

76"

(1930mm)

(940mm)

33"

(838mm)

26"

(660mm)

59" (1499mm)

85" (2159mm)

Assembled Length

NOTES: Drawing views are simplified with panels removed to show overall dimensions. See disassembly and handling instructions in installation manual.

Table 27 Component weights—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic

Dry Weight, Approximate, Including Panels, lb (kg)

Component Air-Cooled Dual-Cool

Compressor Assembly 800 (364) 800 (364)

Filter & Electric Box Assembly 210 (96) 210 (96)

Blower & Coil Assembly 770 (350) 920 (418)

76"

(1930mm)

Assembled

Height

60-3/16"

(1529mm)

37"

DPN000801 Rev. 1

Disassembling the Liebert DS for Transport

Figure 38 Component dimensions—downflow, air-cooled, 28-42kW (8-12 ton), scroll/digital scroll

compressor models

Filter & Electric Box Assembly

39"

(991mm)

Compressor Assembly

Blower & Coil Assembly

(1930mm)

Assembled

Height

76"

(1930mm)

60-3/16"

(1529mm)

37"

(940mm)

33"

(838mm)

13"

(330mm)

59" (1499mm)

72" (1829mm)

Assembled Length

NOTES: Drawing views are simplified with panels removed to show overall dimensions. See disassembly and handling instructions in installation manual.

DPN000802 Rev. 1

Table 28 Component weights—downflow, air-cooled, 28-42kW (8-12 ton), scroll/digital scroll

Dry Weight, Approximate, lb. (kg)

Component Air-Cooled Dual-Cool

Compressor Assembly 490 (223) 490 (223)

Filter & Electric Box Assembly 210 (96) 210 (96)

Blower & Coil Assembly 770 (350) 920 (418)

Disassembling the Liebert DS for Transport

Figure 39 Component dimensions—downflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton), all compressor

models

Filter & Electric Box Assembly

39"

(991mm)

Compressor Assembly

Blower & Coil Assembly

76"

(1930mm)

60-3/16"

(1529mm)

37"

(940mm)

33"

(838mm)

26"

(660mm)

59" (1499mm)

85" (2159mm)

Assembled Length

NOTES: Drawing views are simplified with panels removed to show overall dimensions. See disassembly and handling instructions in installation manual.

DPN000899 Rev. 1

Table 29 Component weights—downflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton), all

Dry Weight, Approximate, Including Panels, lb (kg)

Semi-Hermetic Compressor Scroll or Digital Scroll Compressor

Component

Compressor Assembly 950 (432) 950 (432) 800 (364) 800 (364)

Filter & Electric Box Assembly 210 (96) 210 (96) 210 (96) 210 (96)

Blower & Coil Assembly 770 (350) 920 (418) 770 (350) 920 (418)

Water/Glycol GLYCOOL/Dual-Cool Water/Glycol GLYCOOL/Dual-Cool

76"

(1930mm)

Assembled

Height

Disassembling the Liebert DS for Transport

Figure 40 Component dimensions—downflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic

compressor models

Filter & Electric Box Assembly

39"

(991mm)

Compressor Assembly

Blower & Coil Assembly

76"

(1930mm)

37"

(940mm)

33"

(838mm)

26"

(660mm)

82" (2083mm)

108" (2743mm)

Assembled Length

NOTES: Drawing views are simplified with panels removed to show overall dimensions. See disassembly and handling instructions in installation manual.

DPN000926 Rev. 2

Table 30 Component weights—downflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic

Dry Weight, Approximate, Including Panels, lb (kg)

Component

Compressor Assembly 970 (441) 970 (441)

Filter & Electric Box Assembly 250 (114) 250 (114)

Blower & Coil Assembly 1230 (560) 1410 (641)

Air-Cooled Dual-Cool

76"

(1930mm)

Assembled

Height

59-7/16"

(1509mm)

Disassembling the Liebert DS for Transport

Figure 41 Component dimensions—downflow air-cooled, 53-77kW (15-22 ton), scroll/digital scroll

compressor models

Filter & Electric Box Assembly

39"

(991mm)

Compressor Assembly

Blower & Coil Assembly

76"

(1930mm)

33"

(838mm)

15"

(381mm)

82" (2083mm)

97" (2464mm)

59-7/16"

(1509mm)

37"

(940mm)

Assembled Length NOTES: Drawing views are simplified with panels removed to show overall dimensions. See disassembly and handling instructions in installation manual.

DPN000927 Rev. 2

Table 31 Component weights—downflow, air-cooled, 53-77kW (15-22 ton), scroll/digital scroll

Dry Weight, Approximate, Including Panels, lb (kg)

Component

Compressor Assembly 540 (246) 540 (246)

Filter & Electric Box Assembly 250 (114) 250 (114)

Blower & Coil Assembly 1230 (560) 1410 (641)

Air-Cooled Dual-Cool

76"

(1930mm)

Assembled

Height

Disassembling the Liebert DS for Transport

Figure 42 Component dimensions—downflow water/glycol, GLYCOOL, 53-77kW (15-22 ton), all

compressor models

Filter & Electric Box Assembly

39"

(991mm)

Compressor Assembly

Blower & Coil Assembly

(1930mm)

Assembled Height

76"

(1930mm)

(1509mm)

37"

(940mm)

33"

(838mm)

26"

(660mm)

108" (2743mm)

Assembled Length

82"

(2083mm)

NOTES: Drawing views are simplified with panels removed to show overall dimensions. See disassembly and handling instructions in installation manual.

Table 32 Component weights—downflow water/glycol, GLYCOOL, 53-77kW (15-22 ton), all

Semi-Hermetic Compressor Scroll Compressor

GLYCOOL

Water/Glycol

Liebert DS Section

Compressor Assembly 1270 (578) 1270 (578) 840 (382) 840 (382)

Filter and Electric Box Assembly 250 (114) 250 (114) 250 (114) 250 (114)

Blower & Coil Assembly 1230 (560) 1410 (641) 1230 (560) 1410 (641)

lb (kg)

Dual-Cool

lb (kg)

Water/Glycol

lb (kg)

GLYCOOL

Dual-Cool

lb (kg)

59-7/16"

DPN000932 Rev. 1

Disassembling the Liebert DS for Transport

Figure 43 Component dimensions—downflow, air-cooled, 105kW (30 ton), semi-hermetic compressor

models

Filter and Electric Box Assembly

39"

(991mm)

41-11/16"

(1059mm)

Compressor Assembly

1930mm

Assembled

59-7/16"

(1510mm)

76"

(1930mm)

33"

(838mm)

26"

(660mm)

Blower and Coil Assembly

131" (3327mm)

Assembled Length

105"

(2667mm)

37"

(940mm)

DPN001057 Rev. 0

Table 33 Component weights—downflow, air-cooled, 105kW (30 ton), semi-hermetic compressors

Dry Weight, lb (kg) Approximate (Includes Panels)

Component

Compressor Assembly 950 (432) 950 (432)

Filter & Electric Box Assembly 270 (123) 270 (123)

Blower & Coil Assembly 1820 (827) 2180 (991)

Air Cooled Dual Cool

76"

Height

Disassembling the Liebert DS for Transport

Figure 44 Component dimensions—downflow, air-cooled, 105kW (30 ton), scroll compressor models

Filter & Electric Box Assembly

41-11/16"

(1059mm)

39" (991mm)

Compressor Assembly

Blower & Coil Assembly

76"

(1930mm)

33"

(838mm)

NOTES: Drawing views are simplified with panels removed to show overall dimensions. See disassembly and handling instructions in installation manual.

26"

(660mm)

131" (3327mm)

Assembled Length

105"

(2667mm)

37"

(940mm)

1930mm

Assembled Height

59-7/16"

(1510mm)

DPN001058 Rev. 0

Table 34 Component weights—downflow, air-cooled, 105kW (30 ton), scroll compressor models

Dry Weight, Approximate, Including Panels, lb (kg)

Component

Compressor Assembly 830 (377) 830 (377)

Filter & Electric Box Assembly 270 (123) 270 (123)

Blower & Coil Assembly 1820 (827) 2180 (991)

Air-Cooled Dual-Cool

76"

Disassembling the Liebert DS for Transport

Figure 45 Component dimensions—downflow, water/glycol/GLYCOOL, 105kW (30 ton), all compressor

models

Filter & Electric Box Assembly

39" (991mm)

41-11/16"

(1059mm)

Compressor Assembly

(1930mm)

Blower & Coil Assembly

76"

(1930mm)

33"

(838mm)

NOTES: Drawing views are simplified with panels removed to show overall dimensions. See disassembly and handling instructions in installation manual.

26"

(660mm)

105" (2667mm)

131" (3327mm)

Assembled Length

37"

(940mm)

Assembled

Height

59-7/16"

(1510mm)

DPN001060 Rev. 0

Table 35 Component weights—downflow, water/glycol/GLYCOOL, 105kW (30 ton), all compressor

models

Dry Weight, Approximate, Including Panels, lb (kg)

Semi-Hermetic Compressor Scroll Compressor

Component

Compressor Assembly 1320 (600) 1320 (600) 1200 (545) 1200 (545)

Filter & Electric Box Assembly 270 (123) 270 (123) 270 (123) 270 (123)

Blower & Coil Assembly 1820 (827) 2180 (991) 1820 (827) 2180 (991)

Water/Glycol GLYCOOL/Dual-Cool Water/Glycol GLYCOOL/Dual-Cool

76"

6.5 Disassembly—Upflow Units

For detailed views of upflow units, see Figures 46 through 54.

1. Remove the unit from its skid.

2. Remove all panels except top front accent.

3. Remove all filters on front return units. 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 for easy replacement. Cable ties will need to be cut and replaced as necessary. Reference unit wiring schematic on deadfront panel for details.

5. Label the (3) quick connect plugs from the compressor compartment, and disconnect them.

6. Disconnect compressor wire harness, including crankcase heater wires, if applicable, from contactor in electric box. Pull conduit and wires into compressor compartment.

7. Reheat (optional component): Disconnect reheat wire harness from bottom of contactor in electric box. Unplug low-voltage quick connect for reheat safety wires. Pull conduit and wires into filter and coil assembly section of unit.

8. Humidifier (optional component): Disconnect humidifier wire harness from bottom of contactor in electric box. Remove humidifier low-voltage connections 35-5 and 35-6 by disconnecting quick connect plug, disconnect 35-3 and 35-4 from control board. Pull conduit and wires into filter and coil assembly section of unit.

9. Condensate pump (optional component): Disconnect condensate pump high-voltage wire harness. Remove low volt wires from terminal strip #24 and #55. Pull conduit and wires into filter and coil assembly section of unit.

10. Glycool/Dual-Cool (optional component): On units with actuator, unplug valve actuator harness at actuator and pull wire harness into electric box. Disconnect glycol sensor from control board and pull into filter and coil assembly section of unit.

11. Smoke detector (optional component): For units with smoke detector, remove cover on smoke detector. Remove plug connector from smoke detector and pull into electric box. Remove wires from terminal strip #91, 92, 93 and route the wires to the smoke detector box. Remove the sensing tube from the bottom of the plastic elbow.

12. Filter Clog Switch: Disconnect both tubes from the filter clog switch. Pull both of the tubes into the electric box.

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

14. Remove the pull bar that supports the accent panel from left end of unit, otherwise it will fall out when the compressor section is removed.

15. Evacuate and recover all refrigerant from the unit. Air-cooled units contain a nitrogen holding charge. Water, glycol and GLYCOOL units are factory

charged with refrigerant. Refer to 8.0 - Piping for piping guidelines and to the ASHRAE Refrigeration Handbook for general, good-practice refrigeration piping.

Disassembling the Liebert DS for Transport

NOTICE

Risk of compressor oil contamination with moisture. Emerson recommends 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. This is particularly important with units using R-407C refrigerant.

16. Cut and pull back insulation from 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

Emerson does not recommend unsweating refrigerant connections.

18. Unsweat or cut all copper water pipes that interconnect unit sections.

19. Immediately cap off and seal all piping that has been cut, including the suction and liquid lines, the humidifier supply line and the condensate discharge line (if applicable), as well as fluid piping on GLYCOOL and dual-cool units.

6.5.1 Remove Compressor Assembly

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

2. Remove the 10 thread-cutting bolts holding compressor section together. a. Begin removing bolts at the bottom of the Liebert DS 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

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 Liebert DS. Do not remove the shipping blocks from the semi-hermetic compressors until the Liebert DS is fully reassembled and ready for installation.

NOTE

Emerson recommends using piano jacks when moving this section.

6.5.2 Remove Blower and Electric Box Assembly

1. Remove the motor 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.

Disassembling the Liebert DS for Transport

NOTICE

Risk of improper handling. May cause damage to the Liebert DS.

• The blower and electric box assembly should be moved forward and set on the floor.

• Emerson recommends using four people to remove this section.

• The motor end will be significantly heavier than the other end.

• 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 means before moving the section.

4. Move each section of the Liebert DS to the installation location.

6.6 Reassembly—Upflow Unit

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

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

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

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

5. Reinstall the low-voltage plugs in the compressor section.

6. Rewire the compressor, reheat, humidifier, condensate pump and smoke detector, if applicable.

7. Reattach the sensing tube to the blower inlet.

8. Reattach the plug connection at the actuator and reroute the sensor back through electric box and onto control board, on GLYCOOL and dual-cool units.

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

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

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

12. Refer to 8.0 - Piping for piping guidelines and to the ASHRAE Refrigeration Handbook for general, good-practice refrigeration piping.

13. Open service valves on compressor.

14. Reinsert plastic bushings.

15. Charge the Liebert DS with refrigerant; see the unit’s nameplate for the proper charge.

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

17. Replace the filters.

18. Replace the panels.

Disassembling the Liebert DS for Transport

6.7 Reassembly Checklist

___ 1. Thread-cutting bolts reconnected at a torque specification of 225 in-lb (25Nm).

___ 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. actuator

___ b. terminal strip

___ c. plug connections

___ d. smoke detector, if applicable

___ 4. Coil access plates on left side replaced

___ 5. Motor access plate on right side replaced

___ 6. Water lines brazed

___ 7. Suction and liquid refrigerant lines brazed

___ 8. Unit recharged

___ 9. Filters replaced

___ 10. Panels replaced

Disassembling the Liebert DS for Transport

Figure 46 Component dimensions—upflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressor

models

Blower & Electric Box Assembly

31-1/4"

(794mm)

Compressor Assembly

76"

(1930mm)

Filter & Coil Assembly

76"

(1930mm)

33"

(838mm)

NOTES: Drawing views are simplified with panels removed to show overall dimensions.

See disassembly and handling instructions in installation manual.

26"

(660mm)

85"

Assembled Length

(2159mm)

59"

(1499mm)

Assembled

Height

45-13/16"

(1163mm)

DPN001171 Rev. 0

Table 36 Component weights—upflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressor

models

Dry Weight, Approximate, Including Panels, lb (kg)

Component Air-Cooled Dual-Cool

Compressor Assembly 800 (364) 800 (364)

Blower & Electric Box Assembly 510 (231) 510 (231)

Filter & Coil Assembly 520 (236) 670 (304)

Disassembling the Liebert DS for Transport

Figure 47 Component dimensions—upflow, air-cooled, 28-42kW (8-12 ton), scroll/digital scroll

compressor models

Blower & Electric Box Assembly

31-1/4"

(794mm)

Compressor Assembly

76"

(1930mm)

Assembled

Filter & Coil Assembly

Height

76"

(1930mm)

45-13/16"

(1163mm)

33"

(838mm)

13"

(330mm)

59"

(1499mm)

72" (1829mm)

Assembled Length

NOTES: Drawing views are simplified with panels removed to show overall dimensions.

See disassembly and handling instructions in installation manual.

DPN001172 Rev. 0

Table 37 Component weights—upflow, air-cooled, 28-42kW (8-12 ton), scroll/digital scroll compressor

models

Dry Weight, Approximate, Including Panels, lb (kg)

Component

Compressor Assembly 490 (223) 490 (223)

Blower & Electric Box Assembly 510 (231) 510 (231)

Filter & Coil Assembly 520 (236) 670 (304)

Air-Cooled Dual-Cool

Disassembling the Liebert DS for Transport

Figure 48 Component dimensions—upflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton), all compressor

models

Blower & Electric Box Assembly

31-1/4"

(794mm)

Compressor Assembly

76"

(1930mm)

Filter & Coil Assembly

Assembled

Height

76"

(1930mm)

45-13/16"

(1163mm)

33"

(838mm)

26"

(660mm)

59"

(1499mm)

85" (2159mm)

Assembled Length

NOTES: Drawing views are simplified with panels removed to show overall dimensions.

See disassembly and handling instructions in installation manual.

DPN001173 Rev. 0

Table 38 Component weights—upflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton), all compressor

models

Dry Weight, Approximate, Including Panels, lb (kg)

Semi-Hermetic Compressor Scroll Compressor

Component

Compressor Assembly 950 (432) 950 (432) 800 (364) 800 (364)

Blower & Electric Box Assembly 510 (231) 510 (231) 510 (231) 510 (231)

Filter & Coil Assembly 520 (236) 670 (304) 520 (236) 670 (304)

Water/Glycol GLYCOOL/Dual-Cool Water/Glycol GLYCOOL/Dual-Cool

Disassembling the Liebert DS for Transport

Figure 49 Component dimensions—upflow, air-cooled, 53-77kw (15-22 ton), semi-hermetic compressor

models

Blower & Electric Box Assembly

31-1/4"

(794mm)

Compressor Assembly

(1930mm)

Filter & Coil Assembly

Assembled

Height

76"

(1930mm)

45-13/16"

(1163mm)

33"

(838mm)

26"

(660mm)

82"

(2083mm)

108" (2743mm) Assembled Length

NOTES: Drawing views are simplified with panels removed to show overall dimensions. See disassembly and handling instructions in installation manual.

DPN001209 Rev. 0

Table 39 Component weights—upflow air-cooled 53-77kw (15-22 ton), semi-hermetic compressor

models

Dry Weight, Approximate, Including Panels, lb (kg)

Component

Compressor Assembly 970 (441) 970 (441)

Blower & Electric Box Assembly 770 (349) 770 (349)

Filter & Coil Assembly 760 (345) 940 (426)

Air-Cooled Dual-Cool

76"

Disassembling the Liebert DS for Transport

Figure 50 Component dimensions—upflow, air-cooled, 53-77kw (15-22 ton), scroll/digital scroll

compressor models

Blower & Electric Box Assembly

31-1/4"

(794mm)

Compressor Assembly

76"

(1930mm)

Assembled

Filter & Coil Assembly

76"

(1930mm)

33"

(838mm)

NOTES: Drawing views are simplified with panels removed to show overall dimensions. See disassembly and handling instructions in installation manual.

15"

(381mm)

82" (2083mm)

97" (2464mm) Assembled Length

DPN001210 Rev. 0

Height

45-13/16" (1163mm)

Table 40 Component weights—upflow, air-cooled, 53-77kw (15-22 ton), scroll /digital scroll compressor

models

Dry Weight, Approximate, Including Panels, lb (kg)

Component

Compressor Assembly 540 (246) 540 (246)

Blower & Electric Box Assembly 770 (349) 770 (349)

Filter & Coil Assembly 760 (345) 940 (426)

Air-Cooled Dual-Cool

Disassembling the Liebert DS for Transport

Figure 51 Component dimensions—upflow water/glycol/GLYCOOL 53-77kw (15-22 ton), all compressor

models

Blower & Electric Box Assembly

31-1/4"

(794mm)

Compressor Assembly

(1930mm)

Assembled

Filter & Coil Assembly

76"

(1930mm)

33"

(838mm)

NOTES: Drawing views are simplified with panels removed to show overall dimensions. See disassembly and handling instructions in installation manual.

26"

(660mm)

108" (2743mm) Assembled Length

82" (2083mm)

DPN001211 Rev. 0

Height

45-13/16" (1163mm)

Table 41 Component weights—upflow water/glycol/GLYCOOL, 53-77kW (15-22 ton) all compressor

models

Dry Weight, Approximate, Including Panels, lb (kg)

Semi-Hermetic Compressor Scroll or Digital Scroll Compressor

Component

Compressor Assembly 1270 (578) 1270 (578) 840 (382) 840 (382)

Blower & Electric Box Assembly 770 (349) 770 (349) 770 (349) 770 (349)

Filter & Coil Assembly 760 (345) 940 (426) 760 (345) 940 (426)

Water/Glycol GLYCOOL/Dual-Cool Water/Glycol GLYCOOL/Dual-Cool

76"

Disassembling the Liebert DS for Transport

Figure 52 Component dimensions—upflow, air-cooled, 105kW (30 ton), semi-hermetic compressor

models

Blower & Electric Box Assembly

31-1/4"

(794mm)

Compressor

76"

(1930mm)

Assembly

Filter & Coil Assembly

33"

(838mm)

NOTES: Drawing views are simplified with panels removed to show overall dimensions.

See disassembly and handling instructions in installation manual.

26"

(660mm)

105" (2667mm)

131" (3327mm

Assembled Length

45-13/16" (1164mm)

DPN001254 REV 0

76"

(1930mm)

Assembled

Height

Table 42 Component weights—upflow, air-cooled, 105kW (30 ton), semi-hermetic compressor models

Dry Weight, Approximate, Including Panels, lb (kg)

Component

Compressor Assembly 950 (431) 950 (431)

Blower & Electric Box Assembly 1080 (490) 1080 (490)

Filter & Coil Assembly 970 (440) 1300 (590)

Air-Cooled Dual-Cool

Disassembling the Liebert DS for Transport

Figure 53 Component dimensions—upflow, air-cooled, 105kW (30 ton), scroll/digital scroll compressor

models

Blower & Electric Box Assembly

31-1/4"

(794mm)

Compressor Assembly

(1930mm)

Assembled

Height

45-13/16"

(1164mm)

76"

(1930mm)

Filter & Coil Assembly

33"

(838mm)

NOTE: Drawing views are simplified with panels removed to show overall dimensions.

See disassembly and handling instructions in installation manual.

26"

(660mm)

131" (3327mm

Assembled Length

105"

(2667mm)

DPN001255 REV 0

Table 43 Component weights—upflow, air-cooled, 105kW (30 ton), scroll/digital scroll compressor

models

Dry Weight, Approximate, Including Panels, lb (kg)

Component

Compressor Assembly 830 (376) 830 (376)

Blower & Electric Box Assembly 1080 (490) 1080 (490)

Filter & Coil Assembly 970 (440) 1300 (590)

Air-Cooled Dual-Cool

76"

Disassembling the Liebert DS for Transport

Figure 54 Component dimensions—upflow, water/glycol/GLYCOOL, 105kW (30 ton), all compressor

models

Blower & Electric Box Assembly

31-1/4"

(794mm)

Compressor Assembly

76"

(1930mm)

Assembled

Height

45-13/16"

(1164mm)

DPN001256 REV 0

76"

(1930mm)

Filter & Coil Assembly

33"

(838mm)

NOTES: Drawing views are simplified with panels removed to show overall dimensions.

See disassembly and handling instructions in installation manual.

26"

(660mm)

131" (3327mm

Assembled Length

105"

(2667mm)

Table 44 Component weights—upflow, water/glycol/GLYCOOL, 105kW (30 ton), all compressor models

Dry Weight, Approximate, Including Panels, lb (kg)

Semi-Hermetic Compressor Scroll or Digital Scroll Compressor

Component

Compressor Assembly 1320 (599) 1320 (599) 1200 (544) 1200 (544)

Blower & Electric Box Assembly 1080 (490) 1080 (490) 1080 (490) 1080 (490)

Filter & Coil Assembly 970 (440) 1300 (590) 970 (440) 1300 (590)

Water/Glycol GLYCOOL/Dual-Cool Water/Glycol GLYCOOL/Dual-Cool

7.0 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 to electrical schematic when making connections. Refer to Figure 55 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

Risk of electric shock. Can cause injury or death.

Disconnect local and remote power supplies before working within.

Use voltmeter to make sure power is turned off before making any electrical connections.

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.

50Hz Models Only: Re-install all terminal covers before connecting power to the unit. Failure to install these covers exposes high-voltage terminals.

Follow all local codes.

WARNING

Electrical Connections

Risk of improper wiring, piping, moving, lifting and handling. Can cause equipment damage, 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.

CAUTION

Risk of backward compressor rotation. Can cause equipment damage.

Three-phase power must be connected to the unit line voltage terminals in the proper sequence so that scroll compressors rotate in the proper direction.

CAUTION

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.

CAUTION

Risk of overheated terminals. Can cause wiring and component damage.

Use copper wiring only. Make sure that all connections are tight.

Figure 55 Electrical field connections

Electrical Connections

IntelliSlot Housing

OVERLOAD PROTECTORS

CONTACTORS

60 Hz

CONTACTORS & RELAYS

50 Hz

DOWNFLOW LOW VOLT SECTION

Note: Typical orientation of components shown. Component location varies by option and unit size.

82 89

7576949596 97 91

18 9

UPFLOW

111277

DOWNFLOW

CAUTION:

Risk of broken or shorted low volt wiring. Field-installed low volt wiring must be routed with loop as shown to allow electric box to swing.

P64

P67

37C

38C

37B

38B

37 38 24

19118

55 56

707172

Refer to 7.1 - Electrical Field Connection Descriptions for keys to numbered items.

Note: Refer to DPN000807 for descriptions of numbered callouts.

DPN000806 Rev. 3

POINT OF HINGED LOW VOLT ELECTRIC BOX

UPFLOW LOW VOLT SECTION

7.1 Electrical Field Connection Descriptions

Standard Electrical Connections

1. Primary high-voltage entrance—2-1/2" (64mm); 1-3/4" (44mm); 1-3/8" (35mm) diameter concentric knockouts located in bottom of box.

2. Secondary high-voltage entrance—2-1/2" (64mm); 1-3/4" (44mm); 1-3/8" (35mm) diameter concentric knockouts located in top of box.

3. Primary low-voltage entrance—Three 1-1/8" (28mm) diameter knockouts in bottom of unit.

4. Secondary low-voltage entrance—Three 1-1/8" (28mm) diameter knockouts in top of box.

5. Three-phase electrical service—Terminals are on high-voltage terminal block (disregard if unit has optional disconnect switch). Three-phase service not by Emerson.

6. Earth ground—Terminal for field-supplied earth grounding wire.

7. Remote unit shutdown—Replace existing jumper between terminals 37 and 38 with field-supplied normally closed switch having a minimum 75VA, 24VAC rating. Use field-supplied Class 1 wiring.

8. Customer alarm inputs—Terminals for field-supplied, normally open contacts, having a minimum 75VA, 24VAC rating, between terminals 24 and 50, 51, 55, 56. Use field-supplied Class 1 wiring. Terminal availability varies by unit options.

9. Liebert SiteScan (available from Emerson) to optional Liebert SiteScan.

10. Common alarm—On any alarm, normally open dry contact is closed across terminals 75 and 76 for remote indication. 1A, 24VAC max load. Use Class 1 field-supplied wiring.

11. Heat rejection interlock—On any call for compressor operation, normally open dry contact is closed across terminals 70 and 71 to heat rejection equipment. 1A, 24VAC max load. Use Class 1 field-supplied wiring.

—Terminals 77(-) and 78(+) for a two-wire, twisted pair, communication cable

Electrical Connections

Optional Electrical Connections

12. Factory installed disconnect switch.

13. Secondary disconnect switch and earth ground.

14. Three-phase electrical service—Terminals are on top of disconnect switch. Three-phase service not by Emerson.

15. Smoke sensor alarm—Factory-wired dry contacts from smoke sensor are 91-common, 92-NO and 93-NC. Supervised contacts, 80 and 81, open on sensor trouble indication. This smoke sensor is not intended to function as, or replace, any room smoke detection system that may be required by local or national codes. 1A, 24VAC max load. Use Class 1 field-supplied wiring.

16. Reheat and humidifier lockout—Remote 24VAC required at terminals 82 and 83 for lockout of reheat and humidifier.

17. Condensate alarm (with condensate pump option)—On pump high water indication, normally open, dry contact is closed across terminals 88 and 89 for remote indication. 1A, 24VAC max load. Use Class 1 field-supplied wiring.

18. Remote humidifier—On any call for humidification, normally open dry contact is closed across terminals 11 and 12 to signal field-supplied remote humidifier. 1A, 24VAC max load. Use Class 1 field-supplied wiring.

19. Auxiliary-cool contact—On any call for Econ-O-Coil operation, normally open dry contact is closed across terminals 72 and 73 on dual-cool units only. 1A, 24VAC max load. Use Class 1 field-supplied wiring.

Electrical Connections

Optional Low Voltage Terminal Package Connections

20. Remote unit shutdown - Two additional contact pairs available for unit shutdown (labeled as 37B and 38B, 37C and 38C). Replace jumpers with field-supplied, normally closed switch having a minimum 75VA, 24VAC rating. Use Class 1 field-supplied wiring.

21. Common alarm—On any alarm, two additional normally open dry contacts are closed across terminals 94 and 95 and 96 and 97 for remote indication. 1A, 24VAC max load. Use Class 1 field-supplied wiring.

22. Main fan auxiliary switch—On closure of main fan contactor, normally open dry contact is closed across terminals 84 and 85 for remote indication. 1A, 24VAC max load. Use Class 1 field-supplied wiring.

23. Liebert Liqui-tect open dry contact is closed across terminals 58 and 59 for remote indication (Liebert Liqui-tect sensor ordered separately). 1A, 24VAC max load. Use Class 1 field-supplied wiring.

NOTE

Refer to specification sheet for total unit full load amps, wire size amps and maximum overcurrent protective device size.

™

shutdown and dry contact—On Liebert Liqui-tect activation, normally

8.0 PIPING

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, it is recommended 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.

8.1 Fluid Connections

NOTICE

This unit requires a water drain connection. It may require an external water supply to operate.

Improper installation, application and service practices can result in water leakage from the unit. Water leakage can cause severe property damage and loss of critical data center equipment.

Do not locate unit directly above any equipment that could sustain water damage. Emerson recommends installing leak detection equipment for unit and supply lines.

Piping

8.1.1 Condensate Piping—Field-Installed

• Do not reduce drain lines

• Do not expose drain line to freezing temperatures

• Drain line may contain boiling water. Use copper or other suitable material

• Drain line must comply with local building codes

• Emerson recommends installing under-floor leak detection equipment

Gravity Drain

• 3/4" NPT drain connection is provided on units without optional factory-installed condensate pump

• Pitch drain line toward drain a minimum of 1/8" (3mm) per 1 foot (305mm) of length

• Drain is trapped internally. Do not trap external to equipment

• Drain line must be sized for 2 gpm (7.6 l/m) flow

NOTICE

The drain line must not be trapped outside the unit or water may back up in the drain pan.

Figure 56 Gravity drain for downflow and upflow units

DOWNFLOW DS UNIT UPFLOW DS UNIT

INTERNAL DRAIN

UNIT

EXTERNAL DRAIN

CONTINUOUS DOWNWARD SLOPE

EXTERNAL DRAIN

CONTINUOUS DOWNWARD SLOPE

INTERNAL DRAIN

UNIT

Piping

CORRECT

INTERNAL

UNIT

DO NOT EXTERNALLY TRAP THE UNIT

DRAIN

EXTERNAL DRAIN

INCORRECT

INTERNAL DRAIN

UNIT

EXTERNAL DRAIN

THESE ARE EXTERNAL TRAPS ALSO, ALTHOUGH UNINTENTIONAL. LINES MUST BE RIGID ENOUGH NOT TO BOW OVER TOP OF OTHER OBJECTS.

CORRECT

EXTERNAL DRAIN

INTERNAL DRAIN

UNIT

DO NOT EXTERNALLY TRAP THE UNIT

INCORRECT

EXTERNAL DRAIN

THESE ARE EXTERNAL TRAPS ALSO, ALTHOUGH UNINTENTIONAL. LINES MUST BE RIGID ENOUGH NOT TO BOW OVER TOP OF OTHER OBJECTS.

INTERNAL DRAIN

UNIT

INCORRECTINCORRECT

DPN001556 Rev. 0

Condensate Pump

• 1/2" copper sweat connection is provided on units with optional factory-installed condensate pump

• Condensate Pump (60Hz): Condensate pump is rated for approximately 400 gph at 10 feet total head

• Condensate Pump (50Hz): Condensate pump is rated for approximately 315 gph at 10 feet total head

• Size piping based on available condensate head

8.1.2 Humidifier Supply Water—Optional Infrared

• 1/4" supply line; maximum water pressure is 150 psi (1034kPa)

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

• Do not supply de-ionized water to the humidifier

8.1.3 Requirements of Systems Using Water or Glycol

These guidelines apply to the field leak checking and fluid requirements for field piping systems, including Liebert chilled water, hot water, condenser (water or glycol), GLYCOOL and drycooler circuits.

General Guidelines

• Equipment damage and personal injury can result from improper piping installation, leak checking, fluid chemistry and fluid maintenance.

• Follow local piping codes, safety codes.

• Qualified personnel must install and inspect system piping.

• Contact a local water consultant regarding water quality, corrosion protection and freeze protection requirements.

• Install manual shutoff valves at the supply and return line to each indoor unit and drycooler to permit routine service and emergency isolation of the unit.

CAUTION

Risk of frozen fluids. Can cause equipment damage and building damage. Freezing system fluids can rupture piping. Complete system drain-down cannot be ensured.

When the field piping or unit may be exposed to freezing temperatures, charge the system with the proper percentage of glycol and water for the coldest design ambient.

Automotive antifreeze is unacceptable and must NOT be used in any glycol fluid system.

Piping

CAUTION

Risk of corrosion. Can cause equipment damage. Read and follow individual unit installation instructions for precautions regarding fluid

system design, material selection and use of field-provided devices. Liebert systems contain iron and copper alloys that require appropriate corrosion protection.

Contact a local water consultant regarding water quality, corrosion and freeze protection requirements.

Water chemistry varies greatly by location, 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 water used must be considered, because water from some sources may contain corrosive elements that reduce the effectiveness of the inhibited formulation. Preferably, surface waters that are classified as soft and are low in chloride and sulfate ion content should be employed. Proper inhibitor maintenance must be performed in order to prevent corrosion of the system. Consult glycol manufacturer for testing and maintenance of inhibitors.

Commercial ethylene glycol (Union Carbide Ucartherm, Dow Chemical Dowtherm SR-1 and Texaco E.G. Heat Transfer Fluid 100), when pure, is generally less corrosive to the common metals of construction than water itself. It will, however, assume the corrosivity of the water from which it is prepared and may become increasingly corrosive with use if not properly inhibited.

CAUTION

Risk of oxide layer formation. Can cause equipment damage.

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 system pump operating.

Leak Checking of Unit and Field Piping

Liebert unit fluid systems are factory-checked for leaks and may be shipped with a nitrogen holding charge. Liebert unit fluid circuits should be checked for leaks at installation as described below.

NOTE

During leak checking of field-installed piping, Emerson recommends that the unit be isolated using field-installed shutoff valves. When the Liebert units are included in a leak test, use of fluid for pressure testing is recommended. When pressurized gas is used for leak testing the Liebert unit, the maximum recommended pressure is 30 psig (2 bars) and tightness of the unit should be verified by pressure decay over time, (<2 psig/hour [0.3 bars/hour]) or sensing a tracer gas with suitable instrumentation. Dry seals in fluid valves and pumps may not hold a high gas pressure.

8.2 Refrigeration Piping

WARNING

Risk of explosive discharge from high-pressure refrigerant. Can cause injury or death. This unit contains fluids and/or gases under high pressure. Relieve pressure before working with piping.

WARNING

Risk of refrigerant system rupture or explosion from over pressurization. Can cause equipment damage, injury or death.

For systems requiring EU CE compliance (50Hz), the pressure relief valve must be CE certified to the EU Pressure Equipment Directive by an EU “Notified Body.”

Piping

CAUTION

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

Some Liebert DS Systems require the use of POE (polyolester) oil. See 12.7.1 - Compressor Oil for requirements. 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.

NOTE

A pressure relief valve is provided with Liebert Lee-Temp condensers. A fusible plug is provided on Liebert Fan Speed Control condensers. The Liebert indoor-cooling unit has a factory-installed high pressure safety switch in the high side refrigerant circuit.

8.2.1 Piping Guidelines—Air-Cooled Units

• Indoor unit ships 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 high temperature brazed joints

• Isolate piping from building using vibration-isolating supports

• Refer to Table 45 for piping sizes

• Refer to condenser installation manual for charging information

• Install traps on hot gas (discharge) lines at the base of vertical risers and every 25 feet (7.6m) of vertical rise.

• Consult factory if condenser is installed more than 15 feet (4.6m) below the evaporator

• Consult factory if piping run exceeds 150 feet (46m) equivalent length

• Keep piping clean and dry, especially on units with R-407C refrigerant

• Avoid piping runs through noise-sensitive areas

• Do not run piping directly in front of airstream

• Refrigerant oil – do not mix oil types (see 12.7.1 - Compressor Oil)

Refer to ASHRAE Refrigeration Handbook for general, good-practice refrigeration piping.

Table 45 Recommended refrigerant line sizes - OD copper (inches)*

Standard Scroll Models (Non-Digital Scroll)

Model 028 035 042 053 070 077 105

Hot

Equivalent

Length

50 ft (15m) 7/8 1/2 7/8 1/2 7/8 1/2 7/8 5/8 1-1/8 7/8 1-1/8 7/8 1-3/8 7/8

100 ft (30m) 7/8 5/8 7/8 5/8 7/8 5/8 1-1/8 7/8 1-1/8 7/8 1-1/8 7/8 1-3/8 7/8

150 ft (45 m) 7/8 5/8 7/8 5/8 7/8 5/8 1-1/8 7/8 1-1/8 7/8 1-1/8 7/8 1-3/8 1-1/8

4-Step Semi-Hermetic and Digital Scroll Models

Model 028 035 042 053 070 077 105

Equivalent

Length

50 ft (15m) 3/4 1/2 3/4 1/2 7/8 5/8 7/8 7/8 1-1/8* 7/8 1-1/8 7/8 1-3/8 7/8

100 ft (30m) 3/4 5/8 7/8 5/8 7/8 5/8 1-1/8* 7/8 1-1/8 7/8 1-1/8 7/8 1-3/8 7/8

150 ft (45 m) 7/8 5/8 7/8 5/8 1-1/8* 5/8 1-1/8 7/8 1-1/8 7/8 1-1/8 7/8 1-3/8 1-1/8

* Downsize vertical riser one trade size (1-1/8" to 7/8")

Gas

Line

Hot

Gas

Line

Liquid

Line

Hot

Gas

Line

Hot

Gas

Line

Liquid

Line

Liquid

Line

Hot

Gas

Line

Hot

Gas

Line

Liquid

Line

Liquid

Line

Hot

Gas

Line

Hot

Gas

Line

Liquid

Line

Liquid

Line

Hot

Gas

Line

Hot

Gas

Line

Liquid

Line

Liquid

Line

Hot Gas Line

Liquid

Line

Liquid

Line

Hot

Gas

Line

Hot

Gas

Line

Piping

Liquid

Line

Liquid

Line

Table 46 Indoor unit approximate refrigerant charge for R-22 or R-407C

System Type Model R-22 Charge

per Circuit, lb (kg)

028, 035, 042 6.5 (3.0) 5.5 (2.5)

Air-Cooled

Water, Glycol/GLYCOOL

053, 070, 077 9.5 (5.0) 8.0 (3.6)

105 11.0 (5.0) 9.5 (4.3)

028, 035, 042 13.0 (5.9) 12.2 (5.6)

053, 070, 077 18.5 (8.4) 17.0 (7.8)

105 24.0 (10.9) 22.5 (10.3)

R-407C Charge

per Circuit, lb (kg)

Table 47 Line charges - refrigerant per 100 ft (30m) of Type “L” copper tube

O.D. Liquid Line, lb (kg)

1/2" 7.3 (3.3)

5/8" 11.7 (5.3)

7/8" 24.4 (11.1)

1-1/8" 41.6 (18.9)

Table 48 Outdoor condenser approximate refrigerant charge lb (kg) per circuit

Fan

Model

165 5 (2.3) 27 (12.3)

205 7 (3.2) 38 (17.2)

251 10 (4.6) 38 (17.20

308 11 (5.0) 58 (26.3)

415 15 (6.8) 75 (34.0)

510 30 (13.6) 149 (67.6)

143 17 (8) 64 (29)

214 23 (10 81 (37)

286 29 (13) 98 (44)

409 36 (16) 129 (59)

477 24 (11) 80 (36)

572 57 (26) 196 (89)

Speed

Lee-Temp

(includes receiver)

Piping

8.3 Dehydration/Leak Test and Charging Procedures for R-407C and R-22

8.3.1 Air-Cooled Condenser with Fan Speed Head Pressure Control System

The Fan Speed Control system uses a pressure activated electronic fan speed control system and remotely located thermostat(s) to ensure operation at ambient temperatures as low as 0°F (-18°C).

Fan Speed Control Piping

Two discharge lines and two liquid lines must be field-installed between the indoor unit and the outdoor condenser. See Figures 57 and 59 for details.

Fan Speed Control Materials Supplied

•Built-in, pre-wired condenser control box

• Air-Cooled condenser

• Piping access cover to be reinstalled when piping is complete

• Bolts—four per leg (3/8" x 5/8")

• Terminal block for two-wire, 24V interlock connection between unit and condenser

• Condenser legs—four with 1-fan, 2-fan and 3-fan models; six with 4-fan models

Fan Speed Control Leak Check and Evacuation Procedure

Proper leak check and evacuation can be accomplished only with all system solenoid valves open and check valves accounted for.

Piping

NOTE

Systems with scroll or digital scroll compressors include 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 piping schematic (Figures 57 and 59).

1. If unit power is available, open the unit liquid line solenoid valves using the evacuation function for System #1 and System #2 in the diagnostic section of the iCOM control (refer to the iCOM user manual, SL-18835). If unit power is not available, a field-supplied 24VAC / 75VA power source must be directly connected to each of the unit solenoid valves.

2. For semi-hermetic compressors, connect refrigeration gauges to the suction and discharge service valves of both compressors.

3. For scroll and digital scroll compressors, connect refrigerant gauges to the suction rotalock valves and discharge line Schrader valves (see Note above) on both compressors.

4. 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.

5. 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 rechecked for proper piping. If there is no pressure increase, repeat the leak check procedure for Circuit #2.

6. After completion of leak testing, release the test pressure (per local code) and pull an initial deep vacuum on the system with a suitable pump.

7. After four hours, check the pressure readings and, if they have not changed, break vacuum with dry nitrogen. Pull a second (R-407C and R-22) and third (R407C only) vacuum to 250 microns or less. Recheck the pressure after two hours. After completing this step, proceed to Fan Speed Charging.

Piping

Fan Speed Charging

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

2. Refrigerant charging requires unit operation. Refer to 10.0 - Checklist for Completed Installation.

3. Calculate the amount of charge for the system. Refer to the unit, condenser and refrigerant line charge data in Tables 46, 47 and 48.

4. Weigh in as much of the system charge as possible before starting the unit.

CAUTION

Risk of improper refrigerant charging. Can cause equipment damage.

Refrigerant R407C is a blend of three components 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. Care must be exercised to avoid damage to the compressor. Emerson recommends 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.

5. Turn on unit disconnect switch. Operate the unit for 30 minutes using the charging function for System #1 and System #2 in the diagnostic section of the iCOM control (see iCOM user manual, SL-18835). The charging function operates the compressor at full capacity and energizes the blower motor and the liquid line solenoid valve. The reheat and humidifier are disabled. A minimum 20psig (138kPa) must be established and maintained for the compressor to operate. The charging function can be reset as many times as required to complete unit charging.

Table 49 Fan speed suction pressure transducer settings

R-22 R-407C

Gauge (Sea Level) Absolute Gauge (Sea Level) Absolute

Function

Pump-Down Cutout 20 (138) 35 (241) 20 (138) 35 (241)

Pump-Down Reset 65 (448) 80 (552) 65 (448) 80 (552)

Minimum to Start-Cooling 35 (241) 50 (344) 35 (241) 50 (344)

Low-Pressure Cutout (DX only) 48 (331) 63 (434) 52 (358) 67 (461)

psiG (kPa) psiA (kPa) psiG (kPa) psiA (kPa)

6. Charge the unit until the liquid line sight glass becomes clear. Then add one additional pound (2.2kg) of refrigerant.

NOTE

A digital scroll compressor will have a clear sight glass only when operating at 100% capacity. When operating below 100%, the sight glass may show bubbles with each 15-second unloading cycle.

7. As head pressure builds, the fan speed controlled condenser fan begins rotating. The fan will run at full speed when sufficient head pressure is developed—fan starts to rotate at 190 psig (1310 kPA) and is full speed at 250 psig (1724 kPA).

8.3.2 Air-Cooled Condenser with Lee-Temp “Flooded Condenser” Head Pressure Control System

The Lee-Temp system consists of a modulating type head pressure control valve and insulated receivers with heater pads to ensure operation at ambient temperatures as low as -30°F (-34.4°C).

Lee-Temp Piping

Two discharge lines and two liquid lines must be field-installed between the indoor unit and the outdoor condenser. See Figures 57 and 59 for details.

Lee-Temp Controlled Materials Supplied

•Built-in, pre-wired condenser control box

• Air-Cooled condenser

• Piping access cover to be reinstalled when piping is complete

• Bolts—four per leg (3/8" x 5/8")

• Terminal block for two-wire, 24V interlock connection between unit and condenser

• Condensate legs—four with 1-fan, six on two-and three-fan models and eight on four-fan models

• Bolts—six per receiver (3/8" x 1")

• Lee-Temp system:

• Insulated storage receiver—one per circuit

• Head pressure control valve with integral check valve - one per circuit

• Service valve—one per circuit

• Pressure relief valve—one per circuit

• Liquid level sight glass—two per circuit

• Check valve—one per circuit

Piping

NOTE

Lee-Temp heater pads require a separate, continuous electrical source. See nameplate on unit for proper voltage.

Lee-Temp Leak Check and Evacuation Procedure

Proper leak check and evacuation can be accomplished only with all system solenoid valves open and check valves accounted for.

NOTE

1. If unit power is available, open the unit liquid line solenoid valves using the evacuation function

for System #1 and System #2 in the diagnostic section of the iCOM control. If unit power is not available, a field-supplied 24VAC / 75VA power source must be directly connected to each of the unit solenoid valves.

2. Attach a jumper hose from the service valve fitting on the outlet of the receiver and the Schrader

fitting on the discharge header of the condenser. Front-seat the service valve approximately two (2) turns.

3. For semi-hermetic compressors, connect refrigeration gauges to the suction and discharge service

valves of both compressors.

4. For scroll and digital scroll compressors, connect refrigerant gauges to the suction rotalock valves

and discharge line Schrader valves (see Note above) on both compressors.

5. 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.

6. 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 rechecked for proper piping. If there is no pressure increase, repeat the leak check procedure for Circuit #2.

7. After completion of leak testing, release the test pressure (per local code) and pull an initial deep

vacuum on the system with a suitable pump.

Piping

8. After four hours, check the pressure readings and, if they have not changed, break vacuum with

dry nitrogen. Pull a second (R-407C and R-22) and third (R407C only) vacuum to 250 microns or less. Recheck the pressure after two hours. After completing this step, proceed to Fan Speed Charging on page 79.

9. Remove the jumper hose installed previously from between the service valve fitting and the

condenser. After completing this step, proceed to Lee-Temp Charging.

Lee-Temp Charging

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

on refrigerant type.

2. Refrigerant charging requires unit operation. Refer to 10.0 - Checklist for Completed

Installation.

3. Calculate the amount of charge for the system. Refer to the unit, condenser and refrigerant line

charge data in Tables 46 and 47.

4. Weigh in as much of the system charge as possible before starting the unit.

CAUTION

Risk of improper refrigerant charging. Can cause equipment damage.

Refrigerant R407C is a blend of three components and must be introduced and charged from the cylinder only as a liquid.

5. Turn on unit disconnect switch. Operate the unit for 30 minutes using the charging function for

System # 1 and System # 2 in the diagnostic section of the iCOM control. The charging function operates the compressor at full capacity and energizes the blower motor and liquid line solenoid valve. The reheat and humidifier are disabled. A minimum 20psig (138kPa) must established and maintained for the compressor to operate. The charging function can be reset as many times as required to complete unit charging.

Table 50 Lee-Temp suction pressure transducer settings

R-22 R-407C

Gauge Reading

(Sea Level) Absolute

Function

Pump-Down Cutout 20 (138) 35 (241) 20 (138) 35 (241) Pump-Down Reset 65 (448) 80 (552) 65 (448) 80 (552) Minimum to Start-Cooling 50 (345) 65 (448) 50 (345) 65 (448) Low-Pressure Cutout (DX only) 48 (331) 63 (434) 52 (358) 67 (461)

6. Charge the unit until the liquid line sight glass becomes clear. Then add one additional pound

(2.2 kg) of refrigerant.

psiG (kPa) psiA (kPa) psiG (kPa) psiA (kPa)

Gauge Reading

(Sea Level) Absolute

NOTE

A digital scroll compressor will have a clear sight glass only when operating at 100% capacity. When operating below 100%, the sight glass may show bubbles with each 15-second unloading cycle.

Lee-Temp Receiver Refrigerant Level

On each receiver at the condenser are two refrigerant-level sight glasses. Refrigerant level will vary with outside temperature. Check refrigerant level after the unit has been on for at least 15 minutes.

Sight Glass Levels

40°F (4.5°C) and lower—bottom sight glass is 3/4 full 40 to 60°F (4.5 to 15.5°C)—bottom sight glass is full 60°F (15.5°C) and higher—top sight glass is 3/4 full.

9.0 PIPING SCHEMATICS

Figure 57 Piping schematic—air-cooled, semi-hermetic compressor models

Piping Schematics

Check Valve

Relief Valve

Lee-Temp Receiver

Condenser Coil

(Lee-Temp )

Service Valve

Lee-Temp

Compressor

Muffler

Service

Valve

Liquid Return

Head Pressure

Control Valve

Hot Gas Discharge

Cy linder Unloader (s)

Service Valve

Liquid

Sensing Bulb

Suction

External Equalizer

Inverted trap on discharge and liquid lines to extend above base of coil by a minimum of 7-1/2” (190mm).

Fusi ble Plug

Condenser C oil

(Fan Speed)

Evaporator Coil

Field-installed relief valve (s) required for 50Hz EU CE units rated maximum 480 PSIG (33 Bar).

** Muffler

* Traps every

25 f t (7 .6 m) of rise

* Isolation

valve

Hot Gas Discharge

Expansion Valve

Note: Schematic representation s how n . Do not use for specific connection loc ations .

Two refrigeration circuits provided . Single refrigeration circuit show n f or clarity .

Solenoid

Valve Ref rigerant Piping Field Piping

Servic e/Sc hrader ( Access) Connection No Valve Core

Servic e/Sc hrader ( Access) Connection Wit h Valve Core

Sight Glass

Filter Dryer

Liquid Return

Components are not supplied by

Liebert, but are recommended for proper circuit operation and maintenance.

Components supplied by Liebert and must be field-installed (70kW, 77kW and 105kW models only).

* Is olation

valve

DP N000797 Rev. 3

Figure 58 Piping schematic—air-cooled, scroll compressor models

Piping Schematics

Inverted trap on discharge & liquid lines to extend above bas e of coil by a minimum of 7 -1/2” (190mm ).

Fusi ble Plug

Condenser Coil

(Fan Speed )

Fan Speed

28-42kW Digital Solenoid Valve

53-70kW Digital

Solenoid Valve

Liquid

Sensing Bulb

Suction

Chec k Valve

Relief Valve

Service Valve

Lee-Temp R eceiv er

Condens er Coil

(Lee-Temp )

Lee-Temp

(Required with Digital Scroll)

Evaporator Coil

Liquid Return

Head Pressure

Control Valve

Hot Gas

Discharge

* Traps every 25ft (7.6m) of rise

Service Valve

Compressor

Service Valve

External Equalizer

Field installed relief valve (s) required for 50 Hz EU CE units rated maximum 480 PSIG (33 Bar).

Chec k Valve

Hot Gas Dis charge

Expansion Valve

Solenoid

Filter DryerSight Glass

Valve

Refrigerant Piping

Field Piping

Service/Schrader (Access) Connection No Valve Core

Liquid Return

Components are not supplied by

Liebert, but are recommended for proper circuit operation and maintenance.

Service/Schrader (Acces s) Connection With Valve Core

Not e: Sc hematic representation shown . Do not use for specific connection locations .

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

* Isolation valve

* Isolation val ve

DPN000798 Rev. 2

Figure 59 Piping schematic—water/glycol, semi-hermetic compressor models

For systems with drycoolers, refer to 12.11.3 - Drycooler Settings.

Piping Schematics

Customer Heat Rejection

Cooling Tower

and Pump

System by

Other s

Return Supply

Liebert DS Unit

(and associated piping)

Liquid

Service

Valve

Muffler

Discharge

Cyl i nder

Unloader (s)

Compressor

Service

Valve

Liebert

Heat Rejection

Drycooler

(Glycol )

Hot Gas Reheat

Sensing

Bulb

Suction

External

Equalizer

Evaporator

Coil

Hot Gas R eheat Valve

Check Valve

Expansion

Tank**

Aquastat Sensing Bulb

Hose

Bib *

Shutoff Valv e *

Paradens er®

Condenser

Optional Dual Pump System Shown

Pressure Port *

Shutoff Valve *

Optional 3-Way Regulating Valve

2-Way Regulating Valve

Glycol Pu mps

Air Vents

(typical) ***

Return Supply

Return

Shutoff Valve *

Hose

Bib *

Bypass Valve

Check Valves * (on Dual Pump

Systems only)

Gate Valves *

Pressure Port *

Flo w Switch Supplied with Dual Pump Systems

Flow-Regulating Valve

Supply

Shutoff Valve *

Hose Bib *

Expansion Valve

Sight

Glass

Relief valve(s)

Sensor

supp lie d with 50Hz

Solenoid

Valve

Filter

Dryer

EU CE units rate d maximum 4 80 PSIG (33 Ba r).

To Se cond Refrigeration Circuit

Factory Piping

Field Piping Optional Factory Piping Service/Schrader (Access) Connection No Valve Core

Service/Schrader (Access) Connection With Valve Core

Note: Schematic representation shown. This sc hemat ic does not imply or define elevations

and component location unless specifically noted ..

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

Components are not supplied by

Liebert, but are recommended for proper circuit operation and maintenance. Field-installed at highest point

In system o n return line to pumps Locate at tops of all risers and any

***

interme dia te system high poi nts

DPN00895 Rev. 2

Figure 60 Piping schematic—water/glycol with scroll compressor models

For systems with drycoolers, refer to 12.11.3 - Drycooler Settings.

Piping Schematics

CUSTOMER

HEAT REJECTION

COOLING TOWER

AND PUMP

SYSTEM

BY OTHERS

RETURN SUPPLY

LIEBERT DS

(and associated piping)

LIQUID

Service Val ve

Check Val ve

COMPRESSOR

DISCHARGE

Service Val ve

Sensing Bulb

SUCTION

External Equalizer

LIEBERT

HEAT REJECTION

DRYCOOLER

(Glycol)

HOT GAS REHEAT

EVAPORATOR

COIL

Hot Gas Reheat Val ve

Check Valve

Aquastat Sensing Bulbs

Optional 3-Way Regulating Val ve

PARADENSER

CONDENSER

EXPANSION

Hose Bib*

Shutoff Valve*

2-Way Regulating Val ve

TAN K**

Pressure Port*

Shutoff Valve*

Bypass Valve

Optional Dual Pump System shown

GLYCOL

PUMPS

Air Vents (typical)***

RETURN

Shutoff Valve*

Hose Bib*

Pressure Port*

Flow Switch Supplied with Dual Pump Systems

Flow-Regulating Val ve*

SUPPLY

Shutoff Valve*

Check Valves* (on Dual Pump Systems only)

Gate Valves*

Hose Bib*

Expansion Val ve

Solenoid Val ve

Sight

Glass

Filter Dryer

Relief valve(s) supplied with 50Hz EU CE units rated maximum 480 PSIG (33 Bar)

Sensor

TO SECOND

REFRIGERATION

CIRCUIT

Factory Piping

Field Piping

Optional Factory Piping

Service/Schrader (Access) Connection No Valve Core

Service/Schrader (Access) Connections With Valve Core

Note: Schematic representation shown. This schematic does not imply or define elevations and component location unless specifically noted.

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

* Components are not supplied by Liebert but are recommended for proper circuit operation and maintenance

** Field-installed at highest point in system on return line to pumps

*** Locate at tops of all risers and any intermediate system high points

DPN000896 REV 3

Figure 61 Piping schematic—GLYCOOL semi-hermetic compressor models

For systems with drycoolers, refer to 12.11.3 - Drycooler Settings.

Piping Schematics

LIEBERT DS UNIT

(and associated piping)

LIQUID

Sensing Bulb

Service Val ve

Cylinder Unloader(s)

SUCTION

LIEBERT

HEAT REJECTION

DRYCOOLER

(Glycol)

ECON-O-COIL

EVAPORATOR

COIL

Aquastat Sensing Bulbs

3-Way Chilled Glycol Val ve

EXPANSION

Hose Bib*

Thermistor

TAN K**

Shutoff Valve*

Optional Dual Pump System shown

GLYCOL

PUMPS

Pressure Port*

Air Vents (typical)***

RETURN

Shutoff Valve*

Hose Bib*

Check Valves* (on Dual Pump Systems only)

Gate Valves*

Pressure Port*

Flow Switch Supplied with Dual Pump Systems

Flow-Regulating Val ve *

SUPPLY

Shutoff Valve*

Hose Bib*

COMPRESSOR

Muffler

Service Val ve

External Equalizer

DISCHARGE

Expansion Val ve

Solenoid Val ve

Sight Glass

Filter Dryer

Relief valve(s) supplied with 50Hz EU CE units rated maximum 480 PSIG (33 Bar).

PARADENSER

CONDENSER

TO SECOND

REFRIGERATION

CIRCUIT

3-Way Regulating Val ve

Sensor

Factory Piping

Field Piping

Service/Schrader (Access) Connection No Valve Core

Service/Schrader (Access) Connections With Valve Core

Notes: Schematic representation shown. This schematic does not imply or define elevations and component location unless specifically noted.

Two refrigeration circuits provided. Single refrigeration circuit shown for clarity

* Components are not supplied by Liebert but are recommended for proper circuit operation and maintenance

** Field-installed at highest point in system on return line to pumps

*** Locate at tops of all risers and any intermediate system high points

DPN000897 Rev. 02

Figure 62 Piping schematic—GLYCOOL with scroll compressor models

For systems with drycoolers, refer to 12.11.3 - Drycooler Settings.

Piping Schematics

LIEBERT DS UNIT

(and associated piping)

LIQUID

Sensing Bulb

SUCTION

LIEBERT HEAT REJECTION

DRYCOOLER (Glycol)

ECON-O-COIL

EVAPORATOR COIL

Aquastat Sensing Bulbs

Hose Bib*

Shutoff Valve*

3-Way Chilled Glyco l Valve

3-Way Chilled Glycol Val ve

EXPANSION TAN K**

Shutoff Valve*

Thermistor

Optional Dual Pump System shown

GLYCOL PUMPS

Pressure Port*

Air Vents (typical)***

RETURN

Shutoff Valve*

Hose Bib*

Check Valves* (on Dual Pump Systems only)

Gate Valves*

Pressure Port*

Flow Switch Supplied with Dual Pump Systems

Flow-Regulating Val ve*

SUPPLY

Shutoff Valve*

Hose Bib*

Check Val ve

COMPRESSOR

DISCHARGE

Expansion Val ve

NOTE: Schematic representation shown. This schematic does not imply or define elevations and component location, unless specifically noted.

Solenoid Val ve

NOTE: Two refrigeration circuits provided. Single refrigeration circuit shown for clarity.

SERVICE / SCHRADER (ACCESS) CONNECTION WITH VALVE CORE

SERVICE / SCHRADER (ACCESS) CONNECTION NO VALVE CORE

Service

Val ve

Filter Dryer

Sight Glass

FIELD PIPING FACTORY PIPING

Relief valve(s) supplied with 50 Hz EU CE units rated maximum 480 PSIG (33 Bar).

External Equalizer

Paradenser Condenser

To S e c o n d

Refrigeration

Circuit

3-Way Regulating Val ve

Sensor

* Components are not supplied by Liebert but are recommended for proper circuit operation and maintenance ** Field installed at highest point in system on return line to pumps *** Locate at tops of all risers and any intermediate system high points

DPN000898 REV 3

Figure 63 Piping schematic—water/glycol with digital scroll compressor models

Piping Schematics

CUSTOMER

HEAT REJECTION

COOLING TOWER

AND PUMP

SYSTEM

BY OTHERS

RETURN SUPPLY

LIEBERT DS UNIT

HOT GAS REHEAT

LIEBERT

HEAT REJECTION

DRYCOOLER

(Glycol)

(and associated piping)

LIQUID

28-42kW Digital Solenoid Valve

53-70kW Digital Solenoid Valve

Service Val ve Check

COMPRESSOR

Val ve

DISCHARGE

Expansion Val ve

NOTE: TWO REFRIGERATION CIRCUITS PROVIDED SINGLE REFRIGERATION CIRCUIT SHOWN FOR CLARITY.

Solenoid Val ve

Sight Glass

Relief valve(s) supplied with 50 Hz EU CE units rated maximum 480 PSIG (33 Bar).

Sensing Bulb

Service Val ve

Filter Drier

SUCTION

External Equalizer

EVAPORATOR

COIL

Hot Gas Reheat Val ve

Check Valve

Pressure Transducer

REFRIGERATION

PARADENSER®

CONDENSER

TO SECOND

CIRCUIT

Aquastat Sensing Bulbs

EXPANSION

TAN K**

Hose

Shut-Off Valve*

Bib*

Shut-Off Valve*

Optional 3-Way Motorized Ball Val ve

2-Way Motorized Ball Valve

Optional Dual Pump System shown

GLYCOL

PUMPS

Pressure Port*

Air Vents (typical)***

RETURN SUPPLY

Shut-Off Valve* Shut-Off Valve*

Hose Bib*

Pressure Port*

Flow Switch Supplied with Dual Pump Systems

Flow-Regulating Val ve *

Check Valves*

(on Dual Pump

Systems only)

Gate Valves*

Hose Bib*

From iCOM Control

To iCOM Control

FACTORY PIPING

FIELD PIPING

OPTIONAL FACTORY PIPING

SERVICE / SCHRADER (ACCESS) CONNECTION NO VALVE CORE

SERVICE / SCHRADER (ACCESS) CONNECTION WITH VALVE CORE

NOTE: SCHEMATIC REPRESENTATION SHOWN. THIS SCHEMATIC DOES NOT IMPLY OR DEFINE ELEVATIONS AND COMPONENT LOCATION, UNL ESS SPECIFICALLY NOTED.

DPN001430 Rev. 0

Figure 64 GLYCOOL with digital scroll compressor models

Piping Schematics

LIEBERT DS UNIT

(and associated piping)

LIQUID

28-42kW Digital Solenoid Valve

53-70kW Digital Solenoid Valve

Sensing Bulb

SUCTION

LIEBERT

HEAT REJECTION

DRYCOOLER

(Glycol)

ECON-O-COIL

3-Way Chilled Glycol

EVAPORATOR

COIL

Val ve

Aquastat Sensing Bulb

Hose Bib*

Thermistor

EXPANSION

TAN K* *

Shut-Off Valve*

Optional Dual Pump System shown

GLYCOL

PUMPS

Pressure Port*

Air Vents (typical)***

RETURN

Shut-Off Valve*

Hose Bib*

Check Valves* (on Dual Pimp Systems only)

Gate Valves*

Pressure Port*

Flow Switch Supplied with Dual Pump Systems

Flow-Regulating Val ve *

SUPPLY

Shut-Off Valve*

Hose Bib*

Service Val ve Check

COMPRESSOR

Val ve

DISCHARGE

Expansion Val ve

NOTE: TWO REFRIGERATION CIRCUITS PROVIDED SINGLE REFRIGERATION CIRCUIT SHOWN FOR CLARITY.

Solenoid Val ve

NOTE: SCHEMATIC REPRESEN TATION SHOWN. THIS SCHEMATIC DOES NOT IMPLY OR DEFINE ELEVATIONS AND COMPONENT LOCATION, UNLESS SPECIFICALLY NOTED.

Sight

Glass

Relief valve(s) supplied with 50 Hz EU CE units rated maximum 480 PSIG (33 Bar).

FACTORY PIPING

FIELD PIPING

SERVICE / SCHRADER (ACCESS) CONNECTION NO VALVE CORE

SERVICE / SCHRADER (ACCESS) CONNECTION WITH VALVE CORE

Filter Drier

External Equalizer

Pressure Transducer

REFRIGERATION

PARADENSER®

CONDENSER

TO SECOND

CIRCUIT

3-Way Motorized Ball Valve

From iCOM Control

To iCOM Control

DPN001432 Rev. 0

Figure 65 Optional piping schematic for Econ-O-Coil

Piping Schematics

Return Supply

Thermistor *

Actuator

Return

Supply

Econ-O- Coil

Optional Econ -O-Coil (2-Way Valve)

Factory Piping Field Piping

* Supplied with 10 feet (3m) extra thermistor wire for installation

on field supply line.

Note: 1. Place thermistor in location where flow is always present.

SupplyReturn

The rmistor *

Actuator

Return

Supply

Econ-O -Coil

Optional Econ- O-Coil (3-Way Valve)

2. Thermistor must be located out of the supply air stream.

DPN000805 Rev. 1

Liebert Precision Cooling System DS User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

IMPORTANT SAFETY INSTRUCTIONS

SAVE THESE INSTRUCTIONS

1.0 LIEBERT DS COMPONENTS AND NOMENCLATURE

Figure 1 Downflow model component locations

Figure 2 Upflow model component locations

Figure 3 Liebert DS model number nomenclature

2.0 COOLING CONFIGURATIONS

3.0 PRE-INSTALLATION GUIDELINES

3.1 Room Preparation

Figure 4 Downflow unit ducting and plenum ducting

Figure 5 Upflow ducting configurations

3.4 Connections and System Setup

3.5 Operating Conditions

4.0 LIEBERT DS DIMENSIONS AND WEIGHTS

Table 3 Weights for downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressor models

Table 4 Weights for downflow, air-cooled, 28-42kW (8-12 ton), scroll compressor models

Table 5 Weights for downflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton), all compressor models

Table 6 Weights for downflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic compressor models

Table 7 Weights for downflow, air-cooled, 53-77kW (15-22 ton), scroll compressor models

Table 8 Weights for downflow, water/glycol/GLYCOOL, 53-77kW (15-22 ton), all compressor models

Table 9 Weights for downflow, air-Cooled, 105kW (30 ton), all compressor models

Table 10 Weights for downflow, water/glycol/GLYCOOL, 105kW (30 ton), all compressor models

Table 11 Weight for upflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressor models

Table 12 Weight for upflow, air-cooled, 28-42kW (8-12 ton), scroll or digital scroll compressor models

Table 13 Weights for upflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton), all compressor models

Table 14 Weights for upflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic compressor models

Table 15 Weight for upflow, air-cooled, 53-77kW (15-22 ton), scroll or digital scroll compressor models

Table 16 Weights for upflow, water/glycol/GLYCOOL, 53-77kW (15-22 ton), all compressor models

Table 22 Dimensions for upflow, 28-42kW (8-12 ton)

Table 23 Blower outlet and deck dimensions for upflow, 53-77kW (15-22 ton)

Figure 28 Rear return filter box dimensions

Table 25 Rear return filter box dimensions

Figure 29 Upflow unit plenum dimensions

Table 26 Upflow unit plenum dimensions

5.0 EQUIPMENT INSPECTION AND HANDLING

5.1 Packaging Material

SAFETY INFORMATION

Figure 30 Equipment recommended for handling Liebert DS

5.2 Unpacking the Unit

Figure 31 Removing packaging

5.2.1 Removing the Unit from the Skid With a Forklift

Figure 32 Remove the unit from the skid

5.2.2 Moving the Unit to the Installation Location with Piano Jacks

Figure 33 Moving the unit to its installation location

5.2.3 Removing Piano Jacks

5.2.4 Removing Liebert DS from Skid Using Rigging

Figure 34 Locate center of gravity marker and place slings

Figure 35 Using rigging to lift Liebert DS off skid

5.3 Semi-Hermetic Compressor Spring Isolation System

5.4 Placing the Unit on a Floor Stand

Figure 36 Setting the unit on a floor stand

6.0 DISASSEMBLING THE LIEBERT DS FOR TRANSPORT

6.1 Required Equipment

6.2.1 Remove the Compressor Assembly

6.2.2 Remove the Filter and Electric Box Assembly

6.3.1 Reconnecting Piping, Charging and Replacing Panels

6.4 Reassembly Checklist

6.5.1 Remove Compressor Assembly

6.5.2 Remove Blower and Electric Box Assembly

6.7 Reassembly Checklist

7.0 ELECTRICAL CONNECTIONS

Figure 55 Electrical field connections

7.1 Electrical Field Connection Descriptions

Standard Electrical Connections

Optional Electrical Connections

Optional Low Voltage Terminal Package Connections

8.0 PIPING

8.1 Fluid Connections

Gravity Drain

Figure 56 Gravity drain for downflow and upflow units

Condensate Pump

8.1.3 Requirements of Systems Using Water or Glycol

General Guidelines

Leak Checking of Unit and Field Piping

8.2 Refrigeration Piping

Table 45 Recommended refrigerant line sizes - OD copper (inches)*