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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
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7.0 ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68 7.1 Electrical Field Connection Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 8.0 PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72 8.1 Fluid Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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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 . . . . . . . . .
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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 dimens
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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 connect
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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
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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
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IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS This manual contains important safety instructions that should be followed during the installation ™ and maintenance of the Liebert DS . Read this manual thoroughly before attempting to install or operate this unit. Only qualified personnel should move, install or service this equipment. Adhere to all warnings, cautions and installation, operating and safety instructions on the unit and in this manual. Follow all operating and user instru
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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. C
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Liebert DS Components and Nomenclature 1.0 LIEBERT DS COMPONENTS AND NOMENCLATURE Figure 1 Downflow model component locations 14 3 11 2 9 1 13 15 4 16 10 12 6 8 7 5 1. iCOM Control Display 10. Infrared Humidifier, optional 2. Electric Box 11. Disconnect, optional 3. Filters 12. Condensate Pump, optional 4. Evaporator Coil 13. Smoke Sensor, optional 5. Motor 14. Condenser Cleanout Plugs, 6. Blower fluid-cooled units only 7. Fan Pulley 15.Condenser Drain Plugs, 8. Motor Sheave and Belts
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Liebert DS Components and Nomenclature Figure 2 Upflow model component locations 14 6 11 7 8 9 1 2 5 4 15 16 13 12 10 DPN001222 Rev. 0 1. iCom Control Display 9. Compressor Section 2. Electric Box 10. Infrared Humidifier (optional) 3. Filters 11. Disconnect (optional) 4. Evaporator Coil 12. Condensate Pump (optional) 5. Motor 13. Smoke Sensor (optional) 6. Blower 14. Condenser Cleanout Plugs (fluid cooled units only) 7. Fan Pulley 15. Condenser Drain Plugs ( fluid cooled units only) 8. Motor She
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Liebert DS Components and Nomenclature Figure 3 Liebert DS model number nomenclature 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 D S 0 3 5 A U A 0 3 I * * * * Air Distribution Factory Configuration Number DS = Downflow Standard VS = Upflow Standard Nominal kW Humidification 028,035, 042, 053, 0 - None 070, 077, 105 I - Infrared S - Steam Generating Cooling Type Canister A = Air-Cooled D = Dual-Cooling, Air-Cooled W = Water/Glycol Reheat Type K = GLYCOOL 0 - None H = Dual-Cooling (Water/Glycol) E - Thre
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Cooling Configurations 2.0 COOLING CONFIGURATIONS NOTE All field-installed piping must comply with applicable local, state and federal codes. Air-Cooled Glycol-Cooled Air-cooled unit piping is spun closed from Glycol-cooled units are factory-charged and the factory and contain a nitrogen holding tested. Field-installed piping is required from the charge. Each installation requires refrigerant unit to the drycooler and pump package. piping to a condenser. GLYCOOL Water-Cooled GLYCOOL units a
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Pre-Installation Guidelines 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 un
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Pre-Installation Guidelines 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 r
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Pre-Installation Guidelines 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 set- ting require field piping to be insulated to prevent condensation. • The unit requires a drain, which must co
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Liebert DS Dimensions and Weights 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 LxWxH, in (mm) LxWxH, in (mm) LxWxH, in (mm) DS/VSAS, DS/VSAD, DS/VSAR, DS/VSAG, 102x42x82 DS/VSDS, DS/VSDD, DS/VSDR, DS/VSDG (2591x1067x2083 DS/VSAU, DS/VSAM, DS/VSDU, DS/VSDM 90x42x82 136x42x82 (2286x1067x2083) (3454x1067x2083) DS/VSWS, DS/VSWD, DS/VSWR, DS/VSWG 114x42x82 DS/VSHS, DS/VSHD, DS/VSHR, DS/VSHG (2896x1067x2083)
