Liebert Deluxe System/3 - DX

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InstallationFigure 9Electrical field connectionsField-supplied disconnect switch when factory-installedunit disconnect switch is not providedFactory-installed unitdisconnect switch (optional)Monitoring panel3-phaseelectricservicenot byLiebert3-phase connection; electricservice connection terminalswhen factory disconnect switchis suppliedFactory-installed disconnectswitch (optional)Smoke detector alarmconnections; field-supplied 24V;Class 2 wire to remote alarmcircuits; factory-wired contactsfrom optional smoke detector are#91-comm., #92-NO and #93-NCCommon alarm connection;field-supplied 24V; Class 2 wireto common alarm from pigtails75 +76, which arefactory-connected to commonalarm relay (R3)Electric handy boxfactory-installedwith coverHeat rejection connection;field-supplied 24V; Class 1 wiringto interlock heat rejection frompigtails 70 and 71, which arefactory-connected to compressorside switchesCondensate pump connection forpumps shipped loose; factory-suppliedwiring from pump to pigtails; fuses areinstalled on electric panelRemote unit shutdown; replace existingjumper between Terminals 37 and 38 witha normally closed switch having aminimum 50VA rating; use field-suppliedClass 1 wireField-wired to componentson electric panelElectric connection block3-phase connection; electric serviceconnection terminals when factorydisconnect switch is not suppliedEarth ground connection (60Hz);connection terminal for field-suppliedearth grounding wireEarth ground bar (50Hz only); connectionterminals with factory-ground from eachhigh-voltage component for field-suppliedearth grounding wire3-phase electric service not by LiebertSpecial alarm connections; field-supplied 24V, Class 1wire for special alarms; connections made by addingnormally open contact between terminals (24 & 50) forstandard microprocessor; advanced microprocessorhas four alarms at terminal: 24 & 50; 24 & 51; 24 & 55and 24 & 56Analog inputs; optional terminals 41 to 48 provideconnections for shielded, twisted-pair cable to asmany as four customer supplied analog sensors(AM and AG only)Site monitoring connection; terminals 77(-) and 78(+)are for connection of a 2-wire, twisted-paircommunication cable (available from Liebert orothers) to optional SiteScan and arefactory-connected to the interface board on the unitElectric conduit knockouts on bottom andrear of wire raceway; knockout sizes are1-3/8" (34.9mm) or 1-3/4" (44.5mm) or2-1/2" (63.5mm)DPN000538 Rev1NOTERefer to specification sheet for full load amp and wire size amp ratings.14
Installation2.6 Air Distribution Considerations2.6.1 Raised-Floor Air Flow Distribution ConsiderationsTo ensure proper air distribution, any unusual restrictions within the air circuit must be avoided. Forunder-floor air distribution, observe the following guidelines:Select the air supply grilles and perforated panels for the raised floor to ensure minimum loss of pressurein the circuit. Air volume dampers on grilles, which extend several inches below the surface ofthe raised floor, are usually detrimental to airflow. Consideration of the height of the damper on thegrille in conjunction with the floor height will determine whether this type of grille may be used.The grilles used in raised floors vary in size, the largest being approximately 18" x 6" (457 x 152 mm).A larger grille size would be detrimental to the structural capacity of the raised floor panel. An18" x 6" (457 x 152mm) heavy-duty pencil-proof type grille typically has 56 square inches (0.036m 2 ) offree area. Perforated panels are available from various manufacturers of raised floors. These panelsare usually 2' x 2' (610 x 610mm) square and have a nominal free area of approximately 108 to 144square inches (0.07 to 0.09 m 2 ). Use caution in selecting perforated panels as some manufacturershave only 36 to 40 square inches (0.023 to 0.026 m 2 ) of free area, requiring four times as many panels.Avoid floor elevations below 7-1/2" (190.5mm), loosely installed flooring systems, and below-floorobstructions such as: electrical wiring chases, unusually long computer system cables, or piping clusters.All piping below the elevated floor must be located so that it offers the least resistance to air flow.Careful planning of the piping layout under the raised floor is required to prevent the air flow frombeing blocked. When installing piping on the subfloor, it is recommended that the pipes be mounted ina horizontal plane rather than stacked one above the other. Whenever possible, the pipes should berun parallel to the air flow.Always check specifications of the floor supplier before specifying the total number of perforated panelsand grilles required to handle the air flow. The proper specifications for grilles and perforated panelsshould indicate the total free area required for air delivery rather than the number of panels andgrilles. (See Table 5 below for recommended free area required for each model.) This table indicatesthe recommended free area based on having the supply air grilles and perforated panels sized to handleapproximately 75% of the total cubic feet per minute (CFM) of the units at a velocity of 550 to 600ft./min. (2.8 - 3.1 m/s). The remaining 25 percent of the air flow in the raised floor passes throughcable cutouts, cracks between the panels and other leakage areas.Table 5DirectExpansionUnitsRecommended free area ft 2 (m 2 for grilles or perforated panels at output velocities of550 and 600 fpm (2.8 and 3.1 m/s)Model DH/DE or FH60 (50) Hz2.6.2 Upflow Systems Additional Installation Considerations550 fpm(2.8 m/s)600 fpm(3.1 m/s)75A 86W 72G 4.6 (0.41) 4.2 (0.38)114A (115A) 122W (128W) 110G (111G) 6.3 (0.57) 5.8 (0.52)125A (130A) 138W (143W) 116G (121G) 7.7 (0.69) 7.1 (0.64)199A 219W 192G 11.5 (1.04) 10.5 (0.95)245A 267W 240G 13.9 (1.25) 12.8 (1.15)290A 315W 265G 16.4 (1.48) 15.0 (1.35)380A 412W 363G 20.4 (1.84) 18.8 (1.70)Upflow models can be configured in several different ways with front return, rear return, or bottomreturn and top front supply or top rear supply (on DX models). For in-room applications with no ductwork,and optional plenum with grill, proper clearance must be maintained on the return air side ofthe unit. For a front return, this means several feet in front of the unit. For a bottom return, at least6-8 inches of unrestricted under-floor height is needed.15
Page 1: Precision CoolingFor Business-Criti
Page 5: FIGURESFigure 1 Downflow (DH and DE
Page 8 and 9: Table iiUnit weightsAir Cooled Mode
Page 10 and 11: 1.1.3 GLYCOOL (Chilled Glycol Cool
Page 12 and 13: Installation2.3 Unit DimensionsFigu
Page 14 and 15: InstallationFigure 2Upflow 6, 8 and
Page 16 and 17: InstallationFigure 4 Upflow 15, 20
Page 18 and 19: InstallationFigure 6Projection ofdi
Page 20 and 21: 2.4 PipingInstallationAll fluid and
Page 24 and 25: Installation2.6.3 Ducted Applicatio
Page 26 and 27: InstallationFigure 12 Plenum dimens
Page 28 and 29: 3.3 Refrigerant PipingAir Cooled Mo
Page 30 and 31: Air Cooled ModelsFigure 14 Piping:
Page 32 and 33: Air Cooled ModelsFigure 16 Upflow a
Page 34 and 35: Air Cooled ModelsTable 13ModelCSF/C
Page 36 and 37: Air Cooled ModelsFigure 19 Air cool
Page 38 and 39: Air Cooled ModelsFigure 21 Piggybac
Page 40 and 41: Air Cooled ModelsTable 19 Indoor un
Page 42 and 43: Air Cooled Models3.5.4 Charging1. M
Page 44 and 45: Glycol Cooled/GLYCOOL Models4.0 GLY
Page 46 and 47: Glycol Cooled/GLYCOOL ModelsFigure
Page 52 and 53: Figure 29 6- and 8-fan drycooler ca
Page 56 and 57: Water Cooled Models5.0 WATER COOLED
Page 58 and 59: Water Cooled ModelsFigure 33 Downfl
Page 60 and 61: Table 37Factory-provided piping con
Page 62: 54Water Cooled Models

Liebert Deluxe System/3 - DX

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