Liebert Air-Cooled, Direct-Drive Drycoolers Technical Design Manual 50 Hz & 60 Hz

Liebert Air-Cooled, Direct-Drive Drycoolers Technical Design Manual 50 Hz & 60 Hz

Table of Content.0 Introduction.................................................. Product Description and Features.............................................2 Agency Listed............................................................3 Site Considerations....................................................... 2.0 Standard Features............................................ 3 2. Standard Features All Drycoolers........................................... 3 2.. Drycooler Coil........................................................... 3 2..2 Housing................................................................ 3 2..3 Propeller Fan........................................................... 3 2..4 Fan Motor.............................................................. 3 2..5 Electrical Controls........................................................ 3 3.0 Specific Drycooler Types Features............................. 5 3. Drycooler Control Types and Control Options................................... 5 3.. Fan Speed DSF, DDF................................................... 5 3..2 Fan Cycling Control (D)DNT, DSO, DDO..................................... 5 3..3 Main Fan Control (D)DNL................................................. 5 3..4 No Controls (D)DNC..................................................... 5 3..5 Pump Controls.......................................................... 5 3.2 Sound Level Options...................................................... 5 3.2. Standard Drycoolers...................................................... 5 3.2.2 Liebert Quiet-Line Drycoolers............................................... 5 4.0 Typical System Configurations................................. 7 5.0 Drycooler Performance Data & Selection........................ 7 6.0 Dimensions and Weights..................................... 9 6. Drycooler Dimensions and Anchor Plans..................................... 9 7.0 Piping..................................................... 25 7. Piping Considerations.................................................... 25 7.2 Glycol/Inhibitor Solution................................................... 25 7.3 Piping Connections...................................................... 26 i Liebert Drycooler Technical Design Manual

8.0 Pump Packages and Expansion Tank Ancillary Items......................... 29 9.0 Electrical Data.............................................. 33 9. Line Voltage Electrical Data............................................... 33 9.2 Low-Voltage Control Wiring................................................ 37 9.3 Electrical Connection Diagrams............................................ 39 0.0 Engineering Data, Calculations and Selection Procedure......... 45.0 Guide Specifications........................................ 49 Liebert Drycooler Technical Design Manual ii

List of Figures Figure -: Liebert 3-fan drycooler.............................................................. Figure -2: Product model nomenclature......................................................... 2 Figure 4-: Piping diagram, Liebert DS with glycol with semi-hermetic compressor models................ 8 Figure 4-2: Piping diagram, Liebert DS with water/glycol with semi-hermetic compressor models........... 9 Figure 4-3: Piping diagram, Liebert DS with water/glycol with digital scroll compressor models............ 0 Figure 4-4: Piping diagram, Liebert DS with GLYCOOL with semi-hermetic compressor models........... Figure 4-5: Piping diagram, Liebert DS with GLYCOOL with scroll compressor models.................. 2 Figure 4-6: Piping diagram, Liebert DS with GLYCOOL with digital scroll compressors.................. 3 Figure 4-7: Piping diagram, Liebert PDX with water/glycol........................................ 4 Figure 4-8: Piping diagram, Liebert PDX with GLYCOOL......................................... 5 Figure 4-9: Typical piping arrangement, multiple drycoolers and multiple indoor units..................... 6 Figure 6-: Drycooler planning dimensional data One- and two-fan units.............................. 2 Figure 6-2: Drycooler planning dimensional data Three- and four-fan units............................ 22 Figure 6-3: Drycooler planning dimensional data Six- and eight-fan units............................. 23 Figure 6-4: Typical drycooler footprint dimensions............................................... 24 Figure 7-: Piping connection locations for -, 2-, 3- and 4-fan drycoolers.............................. 26 Figure 7-2: Piping connection locations for 6 and 8 fan drycoolers.................................... 27 Figure 8-: Pump curve, 60 Hz............................................................... 29 Figure 8-2: Single-pump package and mounting.................................................. 30 Figure 8-3: Dual-pump package and mounting................................................... 3 Figure 8-4: Expansion tank.................................................................. 32 Figure 9-: Electrical field connections, -fan DSF/DDF drycooler with pump control...................... 39 Figure 9-2: Electrical field connections, -, 2-, 3- and 4-fan DSO/DDO drycooler with pump control.......... 40 Figure 9-3: Electrical field connections, 6- and 8-fan DSO/DDO drycooler with pump control............... 4 Figure 9-4: Electrical field connections, 6- and 8-fan DDNC drycooler without pump control................ 42 Figure 9-5: Electrical field connections, 6- and 8-fan DDNL/DDNT drycooler without pump control........... 43 Figure 0-: Capacity correction factor......................................................... 46 Figure 0-2: Pressure drop correction factor..................................................... 46 iii Liebert Drycooler Technical Design Manual

List of Tables Table 5-: Drycooler performance date, 60Hz.................................................... 7 Table 5-2: Drycooler performance data, 50Hz.................................................... 8 Table 6-: Standard Drycooler dry weights, shipping weights, dimensions and volume, approximate......... 9 Table 6-2: Liebert Quiet-Line Drycooler dry weights, shipping weights, dimensions and volume, approximate.. 20 Table 7-: Volume in standard tube............................................................ 27 Table 8-: Pump piping and electrical data...................................................... 29 Table 9-: 60Hz electrical values Drycoolers without pump controls.................................. 33 Table 9-2: 50Hz electrical values Drycoolers without pump controls.................................. 34 Table 9-3: 60Hz pump FLA values............................................................. 34 Table 9-4: 60Hz Electrical values Standard drycoolers with integral pump controls...................... 35 Table 9-5: 60 Hz Electrical values - Liebert Quiet-Line drycoolers with integral pump controls............... 36 Table 9-6: Minimum recommended control circuit wire size, AWG, 60 Hz models........................ 37 Table 9-7: Minimum recommended control circuit wire size, mm 2, 50Hz models......................... 38 Table 0-: Specific heats for aqueous ethylene glycol solutions (c v ).................................. 46 Table 0-2: Altitude correction................................................................ 46 Table 0-3: Drycooler data for engineering calculations/selection, 60Hz................................ 47 Liebert Drycooler Technical Design Manual iv

Introduction.0 Introduction. Product Description and Features The Liebert drycooler is a low-profile, direct-drive propeller fan-type air-cooled unit. Constructed with an aluminum cabinet and a copper-tube aluminum fin coil, the unit is quiet and corrosion resistant. All electrical connections and controls are enclosed in an integral NEMA 3R rated electrical panel section of the drycooler. Figure - Liebert 3-fan drycooler.2 Agency Listed Standard 60Hz units are CSA certified to the harmonized U.S. and Canadian product safety standard, CSA C22.2 No 236/UL 995 for Heating and Cooling Equipment and are marked with the CSA c-us logo. R C.3 Site Considerations US When considering installation locations, consider that these units reject heat into the atmosphere and should be located in a clean air area, away from loose dirt and foreign matter that may clog the coil. The drycoolers and pumps should be installed in a location offering maximum security and access for maintenance. Avoid ground level sites with public access and areas that are subject to heavy snow or ice accumulations and sites in the vicinity of steam, hot air or fume exhausts. Drycoolers should be located no closer than 3 feet from a wall, obstruction or adjacent unit. There should be no obstructions over the unit. Drycoolers must not be installed in a pit, where discharge air is likely to be recirculated through the drycooler or installed where objects restrict the air inlet free area. The drycooler must be installed on a level surface to ensure proper glycol flow, venting and drainage. For roof installation, mount the drycooler on suitable curbs or other supports in accordance with local codes. To minimize sound and vibration transmission, mount steel supports across load-bearing walls. Utilize Piggyback drycoolers whenever interior building locations must be used. Liebert Drycooler Technical Design Manual

Introduction Allow adequate space for pump packages, expansion/compression tanks, piping and additional field supplied devices. When mounting pump packages, mount on level surface or suitable curbs that will allow cooling ventilation air to enter from underneath the pump package frame and exit through the louvers. Figure -2 Product model nomenclature Example: DDNT350A48 D D N T 350 A 48 Drycooler C = No Fan Control L = Main Fan Control T = Fan Cycling O = Fan Cycling and Pump Control S = Special Order Fan/Pump Control F = Fan Speed Control P = 208/230V-ph-60Hz * W = 200/220V-ph-50Hz Y = 208/230V-3ph-60Hz A = 460V-3ph-60Hz B = 575V-3ph-60Hz M = 380/45V-3ph-50Hz Optional Disconnect Switch on Models with No Pump Control N = No Pump Control S = Single Pump Control D= Dual Pump Control Model Size 48 = Optional Circuiting (Blank for Standard Circuiting) ** * Single-phase input voltage available only on DSF and DDF drycoolers and will require single-phase pumps. For single-phase voltage on other drycoolers, consult factory for SFA DC2022 availability. ** See 7.3 - Piping Connections for standard and optional circuits available Liebert Drycooler Technical Design Manual 2

Standard Features 2.0 Standard Features 2. Standard Features All Drycoolers Liebert drycoolers consist of drycooler coil(s), housing, propeller fan(s) direct-driven by individual fan motor(s), electrical controls and mounting legs. Liebert air-cooled drycoolers provide for heat rejection needs of glycol-cooled Thermal Management units by using outdoor air to remove heat from circulating water/glycol mixtures and to maintain water/glycol temperatures within designed and controlled ranges. Various control methods are employed to match indoor unit type, indoor unit to drycooler/pump combinations and maximum sound requirements. 2.. Drycooler Coil Liebert-manufactured coils are constructed of copper tubes in a staggered tube pattern. Tubes are expanded into continuous, corrugated aluminum fins. The fins have full-depth fin collars completely covering the copper tubes, which are connected to heavy wall Type L headers. Inlet coil connector tubes pass through relieved holes in the tube sheet for maximum resistance to piping strain and vibration. Coil circuit options can be selected and factory built to provide the right combination of heat transfer and pressure drop for the glycol system. The glycol supply and return pipes are either spun shut (-4 fan) or capped (6-fan and 8-fan) at the factory and include a factory-installed Schrader valve. Coils are factory leak-tested at a minimum of 300 psig (2068kPag), dehydrated, then filled with an inert gas holding charge for shipment and sealed. 2..2 Housing The condenser housing is fabricated from bright aluminum sheet and divided into individual fan sections by full-width baffles. Structural support members, including coil support frame, motor and drive support, are galvanized steel for strength and corrosion resistance. Aluminum legs are provided for mounting the unit for vertical discharge and have rigging holes for hoisting the unit into position. The unit s electrical panel is inside an integral NEMA 3R weatherproof section of the housing. 2..3 Propeller Fan Aluminum propeller fan blades are secured to a corrosion-protected steel hub. Fan guards are heavy gauge, close-meshed steel wire with corrosion-resistant polyester paint finish rated to pass a 000-hour salt spray test. Fans are secured to the fan motor shaft by a keyed hub and dual setscrews. Fan diameter is 26" (660mm) or less. The fans are factory-balanced and run before shipment. 2..4 Fan Motor The drycooler s fan motor is a continuous air-over design equipped with rain shield and permanently sealed bearing. Die-formed, galvanized steel supports are used for rigid mounting of the motor. 2..5 Electrical Controls Electrical controls, overload protection devices and service connection terminals are factory-wired inside the integral electrical panel section of the housing. A locking disconnect switch is factory-mounted and wired to the electrical panel and controlled via an externally mounted locking door handle. An indoor unit interlock circuit enables drycooler operation whenever the indoor unit s compressors are active. Supply wiring and indoor unit interlock wiring are required at drycooler installation, along with any pumps controlled by the drycooler s electrical panel. 3 Liebert Drycooler Technical Design Manual

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3.0 Specific Drycooler Types Features 3. Drycooler Control Types and Control Options 3.. Fan Speed DSF, DDF Specific Drycooler Types Features Available only on single-fan standard drycoolers with integral pump controls. Fan speed control provides an infinite number of speed variations on specially designed, single-phase, permanent split capacitor motor, by monitoring leaving fluid temperature. Fan speed control provides air delivery in direct proportion to heat rejection requirements of the system. The control is adjustable to maintain the temperature of the fluid leaving the drycooler. Either of two temperature ranges may be field-selected: 30 to 60 F (- to 6 C) for GLYCOOL applications or 70 to 00 F (2 to 38 C) for glycol applications. 3..2 Fan Cycling Control (D)DNT, DSO, DDO Available on all sizes of standard sound and Liebert Quiet-Line drycoolers. A thermostatic control cycles the fan on a single-fan drycooler in response to leaving fluid temperatures. Two or more thermostats are employed on drycoolers with two or more fans to cycle fans or groups of fans in response to leaving fluid temperatures. The thermostat setpoints are listed on the factory-supplied schematic. They typically range from 35 to 45 F (2 to 7 C) for GLYCOOL applications and 65 to 75 F (8 to 24 C) for glycol applications. 3..3 Main Fan Control (D)DNL Available for drycoolers without pump controls. All fans run when an external contact closure completes internal 24VAC circuit. 3..4 No Controls (D)DNC Available on all drycoolers without pump controls. All fans are activated at full speed when power is applied to the drycooler. 3..5 Pump Controls Available on all Fan Speed and DSO/DDO Fan Cycling Control drycoolers. Controls for pump up to 7.5hp are built into the same integral electric panel as the drycooler fan controls. Pump fuses, overload heaters and flow switch (dual pump control models) are included with the Liebert pump packages or must be fieldsupplied for field-supplied pumps. Dual Pump Option Provides controls for primary and standby pump. The flow switch senses loss of flow and switches to the standby pump for continuous system operation in the event of a pump failure. An internal switch allows manual selection of the lead/lag pump. 3.2 Sound Level Options 3.2. Standard Drycoolers All Fan Speed, Fan Cycling, Main Fan and No Control drycoolers are standard drycoolers with moderate operating sound levels. 3.2.2 Liebert Quiet-Line Drycoolers Liebert Quiet-Line drycoolers can help meet the strictest noise codes and do so at less cost than traditional drycoolers with acoustic shielding. Liebert Quiet-Line drycoolers utilize the same reliable construction features of the standard drycoolers and have oversized coils and slower speed fan motors that yield the required heat rejection needed at significantly lower sound levels. Liebert Quiet-Line Drycoolers are available on Fan Cycling (with and without Pump Controls), Main Control and No Control Drycoolers. 5 Liebert Drycooler Technical Design Manual

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4.0 Typical System Configurations Typical System Configurations The standard glycol-cooled Precision Cooling system includes these major components: Indoor air conditioning unit with heat exchangers (refrigerant/glycol) Glycol regulating valve Outdoor air-cooled drycooler Glycol pump(s) Expansion/compression tank Pump controls Interconnection piping Unit interlock control wiring Figures 4- and 4-6 show a single unit to drycooler loop arrangement. Figure 4-9 shows a typical configuration of multiple indoor units and multiple outdoor drycoolers using a dual pump package and on a common piping loop. Additional field-supplied components, such as valves, expansion tank, strainers and flow or pressure switches are also shown in Figures 4-, 4-6 and 4-9. These components are necessary and should be included when designing a system with one indoor and one outdoor unit on a piping loop or a system using multiple indoor and outdoor units on a common piping loop. Larger systems may also benefit from an air separator (not shown). 7 Liebert Drycooler Technical Design Manual

Typical System Configurations Figure 4- Piping diagram, Liebert DS with glycol with semi-hermetic compressor models CUSTOMER HEAT REJECTION COOLING TOWER AND PUMP SYSTEM BY OTHERS LIEBERT HEAT REJECTION DRYCOOLER (Glycol) Aquastat Sensing Bulbs EXPANSION TANK 2 Pressure Port Optional Dual Pump System shown GLYCOL PUMPS Check s (on Dual Pump Systems only) Gate s Hose Bib Shut-Off Air Vents (typical) 3 Pressure Port Flow Switch Supplied with Dual Pump Systems RETURN SUPPLY Shut-Off Flow-Regulating LIEBERT DS UNIT (and associated piping) RETURN RETURN SUPPLY SUPPLY Service LIQUID Cylinder Unloader(s) Sensing Bulb SUCTION EVAPORATOR COIL Optional 3-WayRegulating Shut-Off Hose Bib Shut-Off Hose Bib Muffler COMPRESSOR Check DISCHARGE Service External Equalizer 2-Way Regulating Filter Drier PARADENSER CONDENSER By-Pass Expansion Solenoid Sight Glass Relief valve(s) supplied with 50 Hz EU CE units rated maximum 480 PSIG (33 Bar). NOTE: TWO REFRIGERATION CIRCUITS PROVIDED. SINGLE REFRIGERATION CIRCUIT SHOWN FOR CLARITY. TO SECOND REFRIGERATION CIRCUIT Sensor 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, UNLESS SPECIFICALLY NOTED. 2 3 Components are not supplied by Liebert but are required for proper 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 DPN000895 Rev. 6 Liebert Drycooler Technical Design Manual 8

Typical System Configurations Figure 4-2 Piping diagram, Liebert DS with water/glycol with semi-hermetic compressor models CUSTOMER HEAT REJECTION COOLING TOWER AND PUMP SYSTEM BY OTHERS LIEBERT HEAT REJECTION DRYCOOLER (Glycol) Aquastat Sensing Bulbs Hose Bib EXPANSION TANK 2 Shut-Off Pressure Port Optional Dual Pump System shown Air Vents (typical) GLYCOL PUMPS 3 Check s (on Dual Pump Systems only) Gate s Pressure Port Flow Switch Supplied with Dual Pump Systems RETURN SUPPLY Shut-Off Flow-Regulating RETURN SUPPLY LIEBERT DS UNIT (and associated piping) RETURN SUPPLY LIQUID Sensing Bulb SUCTION EVAPORATOR COIL Optional 3-WayRegulating Shut-Off Hose Bib Shut-Off Hose Bib Service Check COMPRESSOR DISCHARGE Service External Equalizer 2-Way Regulating PARADENSER CONDENSER By-Pass Expansion Solenoid Sight Glass Filter Drier Relief valve(s) supplied TO SECOND with 50 Hz EU CE units rated maximum REFRIGERATION 480 PSIG (33 Bar). CIRCUIT NOTE: TWO REFRIGERATION CIRCUITS PROVIDED. SINGLE REFRIGERATION CIRCUIT SHOWN FOR CLARITY. Sensor 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, UNLESS SPECIFICALLY NOTED. 2 3 Components are not supplied by Liebert but are required for proper 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. 6 9 Liebert Drycooler Technical Design Manual

Typical System Configurations Figure 4-3 Piping diagram, Liebert DS with water/glycol with digital scroll compressor models CUSTOMER HEAT REJECTION COOLING TOWER AND PUMP SYSTEM BY OTHERS LIEBERT HEAT REJECTION DRYCOOLER (Glycol) Aquastat Sensing Bulbs EXPANSION TANK 2 Pressure Port Optional Dual Pump System shown GLYCOL PUMPS Check s (on Dual Pump Systems only) Gate s Hose Bib Shut-Off 3 Air Vents (typical) Pressure Port Flow Switch Supplied with Dual Pump Systems RETURN SUPPLY Shut-Off Flow-Regulating RETURN SUPPLY LIEBERT DS UNIT (and associated piping) LIQUID 28-42kW Digital Solenoid 53-70kW Digital Solenoid Sensing Bulb SUCTION EVAPORATOR COIL Optional 3-Way Motorized Ball RETURN Shut-Off Hose Bib SUPPLY Shut-Off Hose Bib Service Check COMPRESSOR DISCHARGE Service External Equalizer 2-Way Motorized Ball From icom Control Expansion Solenoid Sight Glass Filter Drier Relief valve(s) supplied with 50 Hz EU CE units rated maximum 480 PSIG (33 Bar). Pressure Transducer NOTE: TWO REFRIGERATION CIRCUITS PROVIDED. SINGLE REFRIGERATION CIRCUIT SHOWN FOR CLARITY. PARADENSER CONDENSER TO SECOND REFRIGERATION CIRCUIT 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, UNLESS SPECIFICALLY NOTED. 2 3 Components are not supplied by Liebert but are required for proper 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 DPN00430 Rev. 2 Liebert Drycooler Technical Design Manual 0

Typical System Configurations Figure 4-4 Piping diagram, Liebert DS with GLYCOOL with semi-hermetic compressor models LIEBERT HEAT REJECTION DRYCOOLER (Glycol) Aquastat Sensing Bulbs Hose Bib EXPANSION TANK Shut-Off Shut-Off 2 Pressure Port Optional Dual Pump System shown GLYCOL PUMPS Air Vents (typical) 3 Check s (on Dual Pump Systems only) Gate s Pressure Port Flow Switch Supplied with Dual Pump Systems Flow-Regulating RETURN SUPPLY LIEBERT DS UNIT (and associated piping) Service LIQUID Sensing Bulb Cylinder Unloader(s) SUCTION ECON-O-COIL EVAPORATOR COIL 3-Way Chilled Glycol Thermistor RETURN SUPPLY Shut-Off Shut-Off Hose Bib Hose Bib Muffler COMPRESSOR Check Service External Equalizer DISCHARGE PARADENSER CONDENSER 3-Way Regulating Expansion Solenoid Sight Glass Filter Drier Relief valve(s) supplied with 50 Hz EU CE units rated maximum 480 PSIG (33 Bar). NOTE: TWO REFRIGERATION CIRCUITS PROVIDED. SINGLE REFRIGERATION CIRCUIT SHOWN FOR CLARITY. TO SECOND REFRIGERATION CIRCUIT Sensor FACTORY PIPING FIELD 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, UNLESS SPECIFICALLY NOTED. 2 3 Components are not supplied by Liebert but are required for proper 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. 5 Liebert Drycooler Technical Design Manual

Typical System Configurations Figure 4-5 Piping diagram, Liebert DS with GLYCOOL with scroll compressor models LIEBERT HEAT REJECTION DRYCOOLER (Glycol) Aquastat Sensing Bulbs Hose Bib EXPANSION TANK 2 Shut-Off Pressure Port Optional Dual Pump System shown GLYCOL PUMPS Air Vents (typical) 3 Check s (on Dual Pump Systems only) Gate s Pressure Port Flow Switch Supplied with Dual Pump Systems Shut-Off Flow-Regulating RETURN SUPPLY LIEBERT DS UNIT (and associated piping) Service LIQUID Sensing Bulb SUCTION ECON-O-COIL EVAPORATOR COIL 3-Way Chilled Glycol Thermistor Shut-Off RETURN Hose Bib SUPPLY Shut-Off Hose Bib Check COMPRESSOR Service External Equalizer DISCHARGE PARADENSER CONDENSER 3-Way Regulating Expansion Solenoid Sight Glass Filter Drier Relief valve(s) supplied with 50 Hz EU CE units rated maximum 480 PSIG (33 Bar). NOTE: TWO REFRIGERATION CIRCUITS PROVIDED. SINGLE REFRIGERATION CIRCUIT SHOWN FOR CLARITY. TO SECOND REFRIGERATION CIRCUIT Sensor FACTORY PIPING FIELD 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, UNLESS SPECIFICALLY NOTED. 2 3 Components are not supplied by Liebert but are required for proper 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. 5 Liebert Drycooler Technical Design Manual 2

Figure 4-6 Piping diagram, Liebert DS with GLYCOOL with digital scroll compressors Typical System Configurations LIEBERT HEAT REJECTION DRYCOOLER (Glycol) Aquastat Sensing Bulbs Hose Bib EXPANSION TANK 2 Shut-Off Pressure Port Optional Dual Pump System shown 3 GLYCOL PUMPS Air Vents (typical) Check s (on Dual Pump Systems only) Gate s Pressure Port Flow Switch Supplied with Dual Pump Systems Shut-Off Flow-Regulating RETURN SUPPLY LIEBERT DS UNIT (and associated piping) LIQUID 28-42kW Digital Solenoid 53-70kW Digital Solenoid Sensing Bulb SUCTION ECON-O-COIL EVAPORATOR COIL 3-Way Chilled Glycol Thermistor RETURN Shut-Off Shut-Off Hose Bib SUPPLY Hose Bib Service Check COMPRESSOR DISCHARGE Service External Equalizer 3-Way Motorized Ball From icom Control Expansion Solenoid Sight Glass Filter Drier Relief valve(s) supplied with 50 Hz EU CE units rated maximum 480 PSIG (33 Bar). Pressure Transducer NOTE: TWO REFRIGERATION CIRCUITS PROVIDED. SINGLE REFRIGERATION CIRCUIT SHOWN FOR CLARITY. PARADENSER CONDENSER TO SECOND REFRIGERATION CIRCUIT To icom Control OPTIONAL FACTORY PIPING FACTORY PIPING FIELD 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, UNLESS SPECIFICALLY NOTED. 2 3 Components are not supplied by Liebert but are required for proper 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 DPN00432 Rev. 2 3 Liebert Drycooler Technical Design Manual

Typical System Configurations Figure 4-7 Piping diagram, Liebert PDX with water/glycol CUSTOMER HEAT REJECTION COOLING TOWER AND PUMP SYSTEM BY OTHERS RETURN SUPPLY LIEBERT HEAT REJECTION DRYCOOLER (Glycol) Aquastat Sensing Bulbs Hose Bib* EXPANSION TANK** Pressure Port* Shut-Off * Shut-Off * Optional Dual Pump System shown GLYCOL PUMPS Air Vents (typical)*** Check s* (on Dual Pump Systems only) Gate s* Pressure Port* Flow Switch Supplied with Dual Pump Systems Flow-Regulating * RETURN SUPPLY LIEBERT PDX UNIT (and associated piping) LIQUID Digital Solenoid Service Check COMPRESSOR DISCHARGE Sensing Bulb Service SUCTION External Equalizer EVAPORATOR COIL HEAT EXCHANGER Optional 3-Way Motorized Ball 2-Way Motorized Ball RETURN Shut-Off * Hose Bib* SUPPLY Hose Bib* Shut-off (3) Places ++ Y-Strainer + From icom Control Expansion Sight Glass Filter Drier FACTORY PIPING FIELD PIPING OPTIONAL FACTORY PIPING Pressure Transducer SERVICE / SCHRADER (ACCESS) CONNECTION NO VALVE CORE SERVICE / SCHRADER (ACCESS) CONNECTION WITH VALVE CORE NOTES:. SCHEMATIC REPRESENTATION SHOWN. DO NOT USE FOR SPECIFIC CONNECTION LOCATIONS. 2. INSTALL A 20 MESH STRAINER, IN AN EASILY ACCESSIBLE LOCATION, ON THE WATER/GLYCOL SUPPLY TO PREVENT PARTICLES FROM ENTERING THE HEAT EXCHANGER. STRAINER BYPASS VALVES ARE RECOMMENDED TO ALLOW THE STRAINER TO BE CLEANED WHILE MAINTAINING FLOW TO THE COOLING UNIT. To icom Control * Components are not supplied by Liebert, but are required 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 + Components are Liebert supplied and field installed, and are required for proper circuit operation and maintenance. ++ Components are not supplied by Liebert but are recommended for proper circuit operation and maintenance. DPN00293 Rev. 2 Liebert Drycooler Technical Design Manual 4

Typical System Configurations Figure 4-8 Piping diagram, Liebert PDX with GLYCOOL LIEBERT HEAT REJECTION DRYCOOLER (Glycol) Aquastat Sensing Bulbs Hose Bib* EXPANSION TANK** Shut-Off * Shut-Off * Pressure Port* Optional Dual Pump System shown GLYCOL PUMPS Air Vents (typical)*** Check s* (on Dual Pump Systems only) Gate s* Pressure Port* Flow Switch Supplied with Dual Pump Systems Flow-Regulating * RETURN SUPPLY LIQUID Digital Solenoid Service Check COMPRESSOR Expansion LIEBERT PDX UNIT (and associated piping) DISCHARGE Sight Glass Service Sensing Bulb Filter Drier SUCTION External Equalizer Pressure Transducer ECON-O-COIL EVAPORATOR COIL HEAT EXCHANGER FACTORY PIPING FIELD PIPING SERVICE / SCHRADER (ACCESS) CONNECTION NO VALVE CORE SERVICE / SCHRADER (ACCESS) CONNECTION WITH VALVE CORE 3-Way Chilled Glycol Thermistor 3-Way Motorized Ball NOTES:. SCHEMATIC REPRESENTATION SHOWN. DO NOT USE FOR SPECIFIC CONNECTION LOCATIONS. 2. INSTALL A 20 MESH STRAINER, IN AN EASILY ACCESSIBLE LOCATION, ON THE WATER/GLYCOL SUPPLY TO PREVENT PARTICLES FROM ENTERING THE HEAT EXCHANGER. STRAINER BYPASS VALVES ARE RECOMMENDED TO ALLOW THE STRAINER TO BE CLEANED WHILE MAINTAINING FLOW TO THE COOLING UNIT. RETURN Shut-Off * Hose Bib* SUPPLY Hose Bib* Shut-off (3) Places ++ Y-Strainer + From icom Control To icom Control * Components are not supplied by Liebert, but are required 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 + Components are Liebert supplied and field installed, and are required for proper circuit operation and maintenance. ++ Components are not supplied by Liebert but are recommended for proper circuit operation and maintenance. DPN002932 Rev. 2 5 Liebert Drycooler Technical Design Manual

Typical System Configurations Figure 4-9 Typical piping arrangement, multiple drycoolers and multiple indoor units HP (kw) GPM (L/s) Per Pump @ PUMP PACKAGE FT. (kpa) EXPANSION TANK Gal. (L) DRYCOOLER NO. MODEL GPM (L/s) P: Ft (kpa) DRYCOOLER NO. 2 MODEL GPM (L/s) P: Ft (kpa) FS P: LEGEND GATE VALVE CHECK VALVE BUTTERFLY VALVE RELIEF VALVE UNION BALL OR FLOW CONTROL VALVE FLOW SWITCH PRESSURE DROP SEE NOTE 3 COOLING UNIT # MODEL GPM (L/s) P Ft (kpa): COOLING UNIT # MODEL GPM (L/s) P Ft (kpa): COOLING UNIT # MODEL GPM (L/s) P Ft (kpa): COOLING UNIT # MODEL GPM (L/s) P Ft (kpa): COOLING UNIT # MODEL GPM (L/s) P Ft (kpa): COOLING UNIT # MODEL GPM (L/s) P Ft (kpa): STRAINER/FILTER NOTES:. PRESSURE AND TEMPERATURE GAUGES (OR PORTS FOR SAME) ARE RECOMMENDED TO MONITOR COMPONENT PRESSURE DROPS AND PERFORMANCE. 2. FLOW MEASURING DEVICES, DRAIN AND BALANCING VALVES TO BE SUPPLIED BY OTHERS AND LOCATED AS REQUIRED. 3. SEE PRODUCT LITERATURE FOR INSTALLATION GUIDELINES AND CLEARANCE DIMENSIONS. 4. DRAWING SHOWS DUAL PUMP PACKAGE. ALTERNATE PUMP PACKAGES WITH MORE PUMPS MAY BE CONSIDERED, CONSULT SUPPLIER. FS Total GPM (L/s): Pipe Diam.: Inches (mm) P: Ft. (kpa) COOLING UNIT # MODEL GPM (L/s) P Ft (kpa): COOLING UNIT # MODEL GPM (L/s) P Ft (kpa): COOLING UNIT # MODEL GPM (L/s) P Ft (kpa): COOLING UNIT # MODEL GPM (L/s) P Ft (kpa): COOLING UNIT # MODEL GPM (L/s) P Ft (kpa): COOLING UNIT # MODEL GPM (L/s) P Ft (kpa): DPN00099 Rev. 0 Liebert Drycooler Technical Design Manual 6

Drycooler Performance Data & Selection 5.0 Drycooler Performance Data & Selection Model Number *D** Table 5- Standard Unit (Circuits) Data Total Heat Rejection, kbtuh (kw)@ 25F ITD Glycol Flow Rate, GPM (lpm) Pressure Drop, Ft. H 2 0 (kpa) Drycooler performance date, 60Hz No. of Internal Circuits (Std.) No. of Fans Blade Diameter, in (cm) Fans Direct Drive Rated Motor hp Air Flow (CFM) Sound Power, LwA Sound Pressure, dba** Standard Models 033 38 (.) 0 (38) 9. (27) 4 7200 86.5 72.5 069 67 (9.6) 20 (76) 8.9 (27) 8 6870 86.5 72.5 092 92 (27.) 30 (4) 8.6 (26) 2 6600 86.5 72.5 09 09 (3.9) 40 (52) 8. (24) 6 6300 86.5 72.5 2 8 (34.6) 40 (52) 0. (30) 6 6090 86.5 72.5 39 34 (39.3) 40 (52) 7. (2) 6 3700 9.0 75.5 74 73 (50.8) 40 (52) 0.5 (3) 6 3300 9.0 75.5 2 97 97 (57.7) 40 (52) 3.9 (42) 6 2645 9.0 75.5 225 23 (67.7) 65 (246) 0.9 (33) 26 2200 9. 75.5 260 260 (76.3) 60 (227) 0. (30) 24 9900 94.0 77.3 30 3 (9.0) 80 (303) 9.8 (29) 32 3 9000 94.0 77.3 26 (66) 3/4 350 353 (03) 80 (303) 4.6 (44) 32 7400 94.0 77.3 352 328 (96.2) 60 (227) 2.9 (39) 24 24800 94.4 78.5 49 394 (5) 80 (303) 2.7 (38) 32 23650 94.4 78.5 4 466 44 (29) 00 (379) 2.7 (38) 40 22800 94.4 78.5 49 469 (37) 20 (455) 2.8 (38) 48 2700 94.4 78.5 620 62 (82) 60 (606) 9.8 (29) 64 37900 96.8 80.3 650 652 (9) 30 (493) 5.2 (45) 52 6 36500 96.8 80.3 700 706 (207) 60 (606) 4.6 (44) 64 34800 96.8 80.3 790 787 (23) 60 (606) 2.7 (38) 64 47300 97.4 8.5 880 882 (258) 200 (758) 2.7 (38) 80 8 45500 97.4 8.5 940 938 (275) 240 (90) 2.5 (37) 96 43400 97.4 8.5 Liebert Quiet-Line Models 040 44 (3.0) 20 (76) 8.8 (26) 8 30 68.9 56.5 057 57 (6.7) 30 (4) 8.6 (26) 2 2990 68.9 56.5 060 63 (8.4) 40 (52) 8. (24) 6 2840 68.9 56.5 080 89 (26.0) 40 (52) 7.0 (2) 6 6220 72.6 59.5 (32.5) 40 (52) 0.4 (3) 6 2 5980 72.6 59.5 2 2 (35.4) 40 (52) 3.7 (4) 6 5680 72.6 59.5 58 66 (48.7) 60 (227) 0.0 (30) 24 8970 74.8 6.3 73 85 (54.2) 80 (303) 9.7 (29) 32 3 26 (66) /4 8520 74.8 6.3 78 86 (54.5) 80 (303) 4.5 (43) 32 7440 74.8 6.3 205 29 (64.2) 60 (227) 2.9 (39) 24 680 76.2 62.5 4 248 248 (72.8) 80 (303) 2.5 (37) 32 360 76.2 62.5 347 369 (08) 60 (606) 9.8 (29) 64 7040 78.4 64.3 6 356 372 (09) 60 (606) 4.6 (44) 64 4880 78.4 64.3 453 496 (45) 60 (606) 2.6 (38) 64 22720 79.9 65.5 8 498 505 (48) 240 (90) 2.4 (37) 96 9840 79.9 65.5 Standard data based on 95 F (35 C) EAT, 20 F (48.9 C) EFT, 40% E.G. Capacity shown is drycooler THR at sea level. Sound Pressure is dba @ 5ft (.5m) 7 Liebert Drycooler Technical Design Manual

Drycooler Performance Data & Selection Model Number *D** Total Heat Rejection, kbtuh (kw) @ 25F ITD Table 5-2 Standard Circuits Data Glycol Flow Rate, GPM (lpm) Pressure Drop, Ft. H 2 0 (kpa) Drycooler performance data, 50Hz No. of Internal Circuits (Std.) No. of Fans Blade Diameter, in (cm) Fans Direct Drive Rated Motor hp Air Flow (CFM) Sound Power, LwA Sound Pressure, dba** Standard Models 033 35 (0.3) 0 (38) 9. (27) 4 6000 82.5 69. 069 60 (7.4) 20 (76) 8.9 (27) 8 5700 82.5 69. 092 82 (23.9) 30 (4) 8.6 (26) 2 5500 8.7 68.3 09 95 (27.7) 40 (52) 8. (24) 6 5300 8.7 68.3 2 04 (30.3) 40 (52) 0. (30) 6 500 8.7 68.3 39 9 (34.8) 40 (52) 7. (2) 6 400 85.9 7.8 74 53 (44.5) 40 (52) 0.5 (3) 6 00 85.9 7.8 2 97 75 (5.0) 40 (52) 3.9 (42) 6 0500 85.9 7.8 225 204 (59.4) 65 (246) 0.9 (33) 26 000 85.9 7.8 260 230 (67.) 60 (227) 0. (30) 24 6600 89.4 73.7 30 274 (80.0) 80 (303) 9.8 (29) 32 3 5800 89.4 73.7 26 (66) 3/4 350 32 (9.0) 80 (303) 4.6 (44) 32 4500 89.4 73.7 352 290 (84.5) 60 (227) 2.9 (39) 24 20700 9.0 75.7 49 347 (0) 80 (303) 2.7 (38) 32 9700 9.0 75.7 4 466 389 (4) 00 (379) 2.7 (38) 40 9000 9.0 75.7 49 46 (2) 20 (455) 2.8 (38) 48 800 9.0 75.7 620 549 (60) 60 (606) 9.8 (29) 64 3600 92.4 76.7 650 577 (68) 30 (493) 5.2 (45) 52 6 30400 92.4 76.7 700 624 (82) 60 (606) 4.6 (44) 64 2900 92.4 76.7 790 697 (203) 60 (606) 2.7 (38) 64 39400 94.0 78.7 880 78 (228) 200 (758) 2.7 (38) 80 8 37900 94.0 78.7 940 830 (242) 240 (90) 2.5 (37) 96 36200 94.0 78.7 Liebert Quiet-Line Models 040 9 (5.6) 20 (76) 8.8 (26) 8 2600 65.6 53.2 057 45 (3.2) 30 (4) 8.6 (26) 2 2500 65.6 53.2 060 52 (5.3) 40 (52) 8. (24) 6 2400 65.6 53.2 080 65 (9.2) 40 (52) 7.0 (2) 6 5200 69.3 56.2 84 (24.7) 40 (52) 0.4 (3) 6 2 5000 69.3 56.2 2 96 (28.2) 40 (52) 3.7 (4) 6 4700 69.3 56.2 58 27 (37.) 60 (227) 0.0 (30) 24 7500 7.5 58.0 73 5 (44.2) 80 (303) 9.7 (29) 32 3 26 (66) /4 700 7.5 58.0 78 72 (50.3) 80 (303) 4.5 (43) 32 6200 7.5 58.0 205 60 (46.7) 60 (227) 2.9 (39) 24 9700 72.9 59.2 4 248 9 (55.9) 80 (303) 2.5 (37) 32 9500 72.9 59.2 347 302 (88) 60 (606) 9.8 (29) 64 4200 75. 6.0 6 356 343 (0) 60 (606) 4.6 (44) 64 2400 75. 6.0 453 383 (2) 60 (606) 2.6 (38) 64 8900 76.6 62.2 8 498 457 (34) 240 (90) 2.4 (37) 96 6500 76.6 62.2 Standard data based on 95 F (35 C) EAT, 20 F (48.9 C) EFT, 40% E.G. Capacity shown is drycooler THR at sea level. Sound Pressure is dba @ 5ft (.5m) Liebert Drycooler Technical Design Manual 8

6.0 Dimensions and Weights Dimensions and Weights 6. Drycooler Dimensions and Anchor Plans Table 6- Standard Drycooler dry weights, shipping weights, dimensions and volume, approximate Domestic Packed Export Packed Dry No. of Weight Weight Dimension (LxWxH) Volume Weight Dimension (LxWxH) Volume Model Fans lb (kg) lb. (kg) in. (cm) ft 3 (m 3 ) lb. (kg.) in. (cm) ft 3 (m 3 ) *D**033 355 (6) 50 (23) 67 (280) *D**069 375 (70) 530 (240) 637 (289) *D**092 395 (79) 550 (249) 62x36x63 (57x9x60) 8 (2.3) 657 (298) 63x37x64 (60x94x63) 86 (2.5) *D**09 45 (88) 570 (259) 677 (307) *D**2 435 (97) 590 (268) 697 (36) *D**39 500 (227) 757 (343) 94 (45) *D**74 2 540 (245) 797 (362) 02x36x63 (259x9x60) 34 (3.8) 954 (433) 03x37x64 (262x94x63) 4 (4.0) *D**97 580 (263) 837 (380) 994 (45) *D**225 620 (28) 877 (398) 034 (469) *D**260 735 (333) 04 (50) 282 (582) *D**30 3 795 (36) 64 (528) 42x36x63 (36x9x60) 86 (5.3) 342 (609) 43x37x64 (363x94x63) 96 (5.6) *D**350 855 (388) 224 (555) 402 (636) *D**352 940 (426) 40 (635) 658 (752) *D**49 4 020 (463) 48 (672) 82x36x63 (462x9x60) 239 (6.7) 738 (788) *D**466 050 (476) 5 (685) 768 (802) 83x37x64 (465x94x63) 25 (7.0) *D**49 00 (499) 56 (708) 88 (825) *D**620 780 (808) 2223 (008) 2948 (337) *D**650 6 830 (83) 2273 (03) 42x36x94 (36x9x239) 278 (7.9) 2998 (360) 43x37x95 (363x94x24) 29 (8.2) *D**700 880 (854) 2323 (054) 3048 (383) *D**790 2250 (022) 285 (277) 3769 (70) *D**880 8 2330 (058) 2895 (33) 82x36x94 (462x9x239) 356 (0.0) 3849 (746) 83x37x95 (465x94x24) 372 (0.5) *D**940 2430 (03) 2995 (359) 3949 (79) 9 Liebert Drycooler Technical Design Manual

Dimensions and Weights Table 6-2 Liebert Quiet-Line Drycooler dry weights, shipping weights, dimensions and volume, approximate Domestic Packed Export Packed No. of Fans Dry Weight lb (kg) Weight Dimension (LxWxH) Volume Weight Dimension (LxWxH) Volume Model lb. (kg) in. (cm) ft 3 (m 3 ) lb. (kg.) in. (cm) ft 3 (m 3 ) *D**040 375 (70) 530 (240) 637 (289) *D**057 395 (79) 550 (249) 62x36x63 (57x9x60) 8 (2.3) 657 (298) 63x37x64 (60x94x63) 86 (2.5) *D**060 45 (88) 570 (259) 677 (307) *D**080 500 (227) 757 (343) 94 (45) *D** 2 540 (245) 797 (362) 02x36x63 (259x9x60) 34 (3.8) 954 (433) 03x37x64 (262x94x63) 4 (4.0) *D**2 580 (263) 837 (380) 994 (45) *D**58 735 (333) 04 (50) 282 (582) *D**73 3 795 (36) 64 (528) 42x36x63 (36x9x60) 86 (5.3) 342 (609) 43x37x64 (363x94x63) 96 (5.6) *D**78 855 (388) 224 (555) 402 (636) *D**205 940 (426) 40 (635) 658 (752) 4 82x36x63 (462x9x60) 239 (6.7) *D**248 020 (463) 48 (672) 738 (788) *D**347 780 (808) 2223 (008) 2948 (337) 6 42x36x94 (36x9x239) 278 (7.9) *D**356 880 (854)) 2323 (054) 3048 (383) 83x37x64 (465x94x63) 25 (7.0) 43x37x95 (363x94x24) 29 (8.2) *D**453 2250 (022) 285 (277) 3769 (70) 8 82x36x94 (462x9x239) 356 (0.0) 83x37x95 (465x94x24) 372 (0.5) *D**498 2430 (03) 2995 (359) 3949 (79) Liebert Drycooler Technical Design Manual 20

Dimensions and Weights Figure 6- Drycooler planning dimensional data One- and two-fan units 5-/2" (308mm) 43-9/6" (06mm) 37-7/8" (962mm) 9-/2" (2324mm) 43-9/6" (06mm) 8" (457mm) 37-7/8" (962mm) 43-3/6" (097mm) 44" (8mm) 8" (457mm) Note: Overall height to the top of fan guard 43-/8" (095mm) Anchor Plan 42" (067 mm) 43-3/6" (097mm) Anchor Plan 82" (2083 mm) 84" (234mm) Emerson recommends a clearance of 36" (95mm) on each side for proper operation and component access. One -Fan Unit 4-3/6" (046mm) Two-Fan Unit 4-3/6" (046mm) See Figure 6-4 for typical drycooler footprint dimensions. 2 Liebert Drycooler Technical Design Manual

Dimensions and Weights Figure 6-2 Drycooler planning dimensional data Three- and four-fan units 43-9/6" (06mm) 3-/2" (3340mm) 8" (457mm) 37-7/8" (962mm) 7-/2" (4356mm) 70" (778mm) 43-9/6" (06mm) 37-7/8" (962mm) 43-3/6" (097mm) 24" (350mm) Eyebolts for Lifting 8" (457mm) Note: Overall height to the top of fan guard 43-/8" (095mm) Anchor Plan 22" (3099mm) 43-3/6" (097mm) 64" (466mm) Emerson recommends a clearance of 36" (95mm) on each side for proper operation and component access. Three-Fan Unit 4-3/6" (046mm) See Figure 6-4 for typical drycooler footprint dimensions. Anchor Plan 82" (2083 mm) 80" (2032mm) Electric Box End Four-Fan Unit 4-3/6" (046 mm) Liebert Drycooler Technical Design Manual 22

Dimensions and Weights Figure 6-3 Drycooler planning dimensional data Six- and eight-fan units 3-/2" (3340mm) 87-/8" (223mm) 37-7/8" (962mm) 7-/2" (4356mm) 87-/8" (223mm) 37-7/8" (962mm) 86-3/4" (2203mm) 24" (350mm) Overalll height to the top of the fan guard is 43-/8 (095mm). Anchor Plan 22" (3099mm) 59" (499mm) 8" (457mm) 86-3/4" (2203mm) -/2" (38mm) diameter hole for rigging (typ.4) 8" (457mm) 70" (778mm) 64" (466mm) Emerson recommends a clearance of 36" (95mm) on each side for proper operation and component access. Six-Fan Unit 84-3/4" (253 mm) See Figure 6-4 for typical drycooler footprint dimensions. Anchor Plan 82" (2083mm) 80" (2032 mm) Electric Box End Eight-Fan Unit 84-3/4" (253mm) 23 Liebert Drycooler Technical Design Manual

Dimensions and Weights Figure 6-4 Typical drycooler footprint dimensions (25.4mm) -3/4 (44.5mm) 4-/4 (08mm) -3/4 (44.5mm) 9/6" (4mm) Typical Diameter 2 (50.8mm) 4-/4 (08mm) 2 (50.8mm) Liebert Drycooler Technical Design Manual 24

Piping 7.0 Piping 7. Piping Considerations NOTICE Risk of freezing temperatures and broken pipes. Can cause building and equipment damage. When using water under pressure to test the system for leaks, immediately charge the tested system with glycol. Complete system drain-down cannot be assured. Emerson recommends testing instead with common refrigerant gas pressurized with nitrogen and using a refrigerant-type leak detector to check for leaks. Galvanized pipe or other components should not be used with an inhibited glycol system. All fluid piping must comply with local codes. Care in sizing pipes will help reduce pumping power and operating costs. Manual shutoff valves and unions should be installed at the supply and return line of each major system component. This permits routine service or emergency isolation of the component. Where connecting to a city water supply, provide a disconnection means. A city water source is desirable for initially charging the system and as an emergency standby cooling source. The minimum glycol temperature to be supplied from the drycooler determines whether the supply and return lines should be insulated to prevent condensation (see Table 0-). Vents are required at system high points to vent trapped air when filling the system. Since the system is not open to the atmosphere, an expansion tank must be provided for expansion and contraction of the fluid with temperature change. A relief valve is also necessary. A fill port is necessary for charging the system with glycol. Depending on the complexity of the system, various other devices may be specified, such as pressure gages, valves, pumps and sensors. 7.2 Glycol/Inhibitor Solution The percentage of glycol to water will be determined by the outdoor ambient in which the system is operating. Just as critical is the inhibitor used with the glycol. Commercial ethylene glycol (Union Carbide Ucartherm, Dow Chemical Dowtherm SR-, and Texaco E.G. Heat Transfer Fluid 00), when pure, is generally less corrosive to the metals than water. 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. Proper inhibitor maintenance must be performed to prevent corrosion of the glycol system. Consult glycol manufacturer for testing and maintenance of inhibitors. Automotive antifreeze is unacceptable and must not be used in any glycol fluid system. There are two basic concepts of corrosion inhibition: They are classified as corrosion inhibitors or environmental stabilizers. The corrosion inhibitors function by forming a surface barrier that protects the metals. Environmental stabilizers decrease corrosion by stabilizing or favorably altering the overall environment. An alkaline buffer, such as borax, is a simple example, since its prime purpose is to maintain an alkaline condition (ph above 7). The quality of the water of dilution must be considered because water may contain corrosive elements which reduce the effectiveness of the inhibited formulation. Surface waters that are classified as soft and are low in chloride and sulfate ion content (less than 00 ppm each) should be employed. 25 Liebert Drycooler Technical Design Manual

Piping 7.3 Piping Connections Figure 7- Piping connection locations for -, 2-, 3- and 4-fan drycoolers INLET CONNECTION (UPPER HEADER) OUTLET CONNECTION (LOWER HEADER) /2" FPT CONNECTIONS EXPANSION TANK DPN000275 Pg. Rev. 4 Piping Connection Sizes (O.D. Cu) Inlet and Outlet Model No. No. of Coil Circuits Pipe Diameter, in. -033 4* -3/8-069 4, 8* -3/8-092 6, 2*, 6-5/8-09 8-3/8-09 6* 2-/8-2 8-3/8-2 6*, 26 2-/8-39 8, 6* 2-/8-74 8, 6*, 24 2-/8-97 8-3/8-97 6*, 32 2-/8-225 6, 26* 2-/8-260 6, 24* 2-/8-30 6, 32* 2-/8-350 6, 32* 2-/8-350 48 2-5/8-352 6, 24* 2-/8-49 6, 32* 2-/8-466 26 2-/8-466 40* 2-5/8-49 6, 32 2-/8-49 48* 2-5/8 * = Standard Circuiting Liebert Drycooler Technical Design Manual 26

Piping Figure 7-2 Piping connection locations for 6 and 8 fan drycoolers INLET CONNECTIONS 4 INLET, 4 OUTLET CONNECTIONS SHOWN SEE TABLE FOR ACTUAL NUMBER PROVIDED. OUTLET CONNECTIONS DPN002429 Rev. Model No. -620-650 -700-790 -880-940 * = Standard Circuiting No. of Fans 6 8 No. of Internal Circuits 32 No. of Inlets and Outlets 64* 2 40 52* 80 4 32 64* 2 96 4 32 64* 2 52 80* 4 32 64 2 96* 4 Inlet and Outlet Connection sizes (IDS, Cu), in. 2-/8 Table 7- Volume in standard tube Type L copper tube Diameter (in.) Volume Outside Inside Gal/ft (L/m).50 0.430 0.0075 (0.09).625 0.545 0.02 (0.5).75 0.666 0.08 (0.22).875 0.785 0.025 (0.3).25.025 0.0429 (0.53).375.265 0.0653 (0.8).625.505 0.0924 (.5) 2.25.985 0.6 (2.00) 2.625 2.465 0.248 (3.08) 3.25 2.945 0.354 (4.40) 3.625 3.425 0.479 (5.95) 4.25 3.905 0.622 (7.73) 27 Liebert Drycooler Technical Design Manual

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Pump Packages and Expansion Tank Ancillary Items 8.0 Pump Packages and Expansion Tank Ancillary Items Table 8- Connections Pump piping and electrical data Electrical Data FLA Pump Suct. Pump Disc. 208 230 460 575 HP Conn., in. Conn., in. Hz PH Volts Volts Volts Volts 3/4 7.6 6.9 3/4 3.5 3.2.6.3 -/4 3/4 -/2 6.6 6.0 3.0 2.4 2 60 7.5 6.8 3.4 2.7 3 3 0.6 9.6 4.8 3.9 -/2 5 -/4 6.7 5.2 7.6 6. 7-/2 3 3 24.2 22.0.0 9.0 200 Volts 220 Volts 380/45 Volts 3.26 3.24.64 /.63 -/2 -/4 3/4 4.5 4.47 2.4 / 2.25 2 50 3 5.77 5.7 3.00 / 2.88 3 -/4 8.76 8.67 4.7 / 4.38 -/2 5 4.94 4.5 7.9 / 7.47 Figure 8- Pump curve, 60 Hz Total Head, Feet/Water 80 60 40 20 00 80 F E D C B G Curve A B C D E F G HP 3/4 (-ph) 3/4 (3-ph).5 2 3 5 7.5 60 A 40 20 0 0 20 30 40 50 60 70 80 20 60 200 250 300 400 Flow Rate, GPM 29 Liebert Drycooler Technical Design Manual

Pump Packages and Expansion Tank Ancillary Items Figure 8-2 Single-pump package and mounting 2 7 /4" " SINGLE PACKAGE 0.75-7.5 HP 3 9" 483mm 5 7/8" 403mm 2 7/8" 73mm 6 3/8" 62mm 3/4" 44mm 8 3/4" 222mm 2 /4" 3mm 30" 762mm 3" (76.2mm) DIA. PUMP SUCTION CONNECTION K.O.'S 7" 432mm 4 PUMP PACKAGE MOUNTING ANGLES 2 3" (76.2mm) DIA. PUMP DISCHARGE CONNECTION K.O.'S 3 7/8" (22.2mm) DIA. ELECTRICAL K.O.'S 4 /2" (2.7mm) DIA. HOLES FOR MOUNTING 4 3/4" 9mm NOTE: ANGLES LOCATED INSIDE, BOTTOM OF PUMP PACKAGE. VIEW USED FOR MOUNTING REFERENCE. A B C DPN000278 Rev. Mounting-hole Dimensional Data, in. (mm) Pump package A B C Single (0.75 7.5 HP) 5-/4 (387) 2-/2 (64) 22-/2 (572) Liebert Drycooler Technical Design Manual 30

Pump Packages and Expansion Tank Ancillary Items Figure 8-3 Dual-pump package and mounting DUAL PACKAGE 0.75-5 HP 2 2 32 /4" 89mm 3 2 3 3" (76.2mm) DIA. PUMP SUCTION CONNECTION K.O.'S 3" (76.2mm) DIA. PUMP DISCHARGE CONNECTION K.O.'S 7/8" (22.2mm) DIA. ELECTRICAL K.O.'S 5 7/8" 403mm 6 3/8" 62mm 3 2 7/8" 73mm 4 /8" 05mm 9" 483mm 4 5" (27mm) DIA. PUMP DISCHARGE CONNECTION HOLE 5 5" (27mm) DIA. PUMP SUCTION CONNECTION HOLE 6 /2" (2.7mm) DIA. HOLES FOR MOUNTING 8 3/4" 222mm 2 /4" 3mm 3/4" 44mm 23 3/4" 603mm 27 /4" 692mm 32" 83mm 30" 762mm PUMP PACKAGE MOUNTING ANGLES 6 DUAL PACKAGE 7.5 HP 9 5/6" 49mm 7/8" 302mm 5 7/8" 403mm 32 3/8" 822mm 4 5 5 3 4 4 /4" 048mm 3/4" 9mm A B NOTE: ANGLES LOCATED INSIDE, BOTTOM OF PUMP PACKAGE. VIEW USED FOR MOUNTING REFERENCE. 6 C 33 3/6" 843mm 29 3/6" 74mm 4" 04mm 6 3/8" 46mm 6 /2" 65mm DPN000328 Pg. Rev. Mounting-hole Dimensional Data, in. (mm) Pump package A B C Dual (0.75 5.0 HP) 30-/4 (768) 2-/2 (64) 22-/2 (572) Dual (7.5 HP) 39-5/6 (999) -3/4 (45) 26-7/8 (683) 3 Liebert Drycooler Technical Design Manual