Liebert Precision Cooling System DS User Manual
Precision Cooling
For Business-Critical Continuity™
Liebert® DS
User Manual
28-105kW, 8-30 Tons, Upflow and Downflow, 50/60Hz
™
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
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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
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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
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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
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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
v
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
vi
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
1
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.
2
1.0 LIEBERT DS COMPONENTS AND NOMENCLATURE
Figure 1 Downflow model component locations
14
3
11
2
9
Liebert DS Components and Nomenclature
1
15
4
16
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
12
6
8
7
5
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
13
DPN000958
Rev. 1
3
Figure 2 Upflow model component locations
Liebert DS Components and Nomenclature
14
6
11
7
8
9
1
2
5
4
15
16
1. iCom Control Display
2. Electric Box
3. Filters
4. Evaporator Coil
5. Motor
6. Blower
7. Fan Pulley
8. Motor Sheave and Belts
13
12
10
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)
4
Figure 3 Liebert DS model number nomenclature
Liebert DS Components and Nomenclature
1
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
4
355
Voltage
A - 460/3/60
B - 575/3/60
C - 208/3/60
D - 230/3/60
2 - 380/3/60
A
7
6
U
8
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
5
2.0 COOLING CONFIGURATIONS
t
s
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.
6
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.
7
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
2
1
2
1
2
1
1
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.
2
* 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).
8
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.”
9
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)
10
Liebert DS Dimensions and Weights
S
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
2"
(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)
11
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
2"
(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)
12
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
2"
(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)
13
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)
2"
(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
14
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)
2"
(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"
15
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
2"
(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
16
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
17
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
18
Liebert DS Dimensions and Weights
f
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.
2"
(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
19
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)
2"
(51mm)
TOP VIEW
73"
(1854mm)
FRONT VIEW
72"
(1829mm)
Low Volt Connection(s)
Shaded area indicates a
recommended minimum
clearance for component
access.
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.
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
20
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