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.
7.0 ELECTRICAL CONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 7.1 Electrical Field Connection Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 8.0 PIPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .72 8.1 Fluid Connections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FIGURES Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 Figure 29 Figure 30 Figure 31 Figure 32 Figure 33 Figure 34 Figure 35 Figure 36 Downflow model component locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 37 Component dimensions—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Figure 38 Component dimensions—downflow, air-cooled, 28-42kW (8-12 ton), scroll/digital scroll compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TABLES Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Table 12 Table 13 Table 14 Table 15 Table 16 Table 17 Table 18 Table 19 Table 20 Table 21 Table 22 Table 23 Table 24 Table 25 Table 26 Table 27 Table 28 Table 29 Table 30 Table 31 Table 32 Table 33 Table 34 Table 35 Table 36 Table 37 Table 38 Table 39 Table 40 Table 41 Table 42 Shipping dimensions—domestic and export, inches (mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 43 Table 44 Table 45 Table 46 Table 47 Table 48 Table 49 Table 50 Table 51 Table 52 Table 53 Table 54 Table 55 Table 56 Table 57 Table 58 Table 59 Table 60 Component weights—upflow, air-cooled, 105kW (30 ton), scroll/digital scroll compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 Component weights—upflow, water/glycol/GLYCOOL, 105kW (30 ton), all compressor models . . . . . . . . . . .
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 instructions.
! 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.
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 2. Electric Box 3. Filters 4. Evaporator Coil 5. Motor 6. Blower 7. Fan Pulley 8. Motor Sheave and Belts 9. Compressor Section 10. Infrared Humidifier, optional 11. Disconnect, optional 12. Condensate Pump, optional 13. Smoke Sensor, optional 14. Condenser Cleanout Plugs, fluid-cooled units only 15.
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 1. iCom Control Display 2. Electric Box 3. Filters 4. Evaporator Coil 5. Motor 6. Blower 7. Fan Pulley 8. Motor Sheave and Belts DPN001222 Rev. 0 9. Compressor Section 10. Infrared Humidifier (optional) 11. Disconnect (optional) 12. Condensate Pump (optional) 13. Smoke Sensor (optional) 14. Condenser Cleanout Plugs (fluid cooled units only) 15.
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 DS = Downflow Standard VS = Upflow Standard Factory Configuration Number Nominal kW 028,035, 042, 053, 070, 077, 105 Humidification 0 - None I - Infrared S - Steam Generating Canister Cooling Type A = Air-Cooled D = Dual-Cooling, Air-Cooled W = Water/Glycol K = GLYCOOL H = Dual-Cooling (Water/Glycol) Rehea
Cooling Configurations 2.0 COOLING CONFIGURATIONS NOTE All field-installed piping must comply with applicable local, state and federal codes. 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. Glycol-Cooled Glycol-cooled units are factory-charged and tested. Field-installed piping is required from the unit to the drycooler and pump package.
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.
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.
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 setting require field piping to be insulated to prevent condensation.
Liebert DS Dimensions and Weights 4.
Liebert DS Dimensions and Weights Figure 6 Cabinet and floor planning dimensions—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressor models Secondary Refrigerant Piping Entrance 56-7/8" Opening (1445mm) Notes: Filters are accessible through top of unit only. 33" (838mm) 24-3/8" Opening (619mm) Air Inlet Opening 35" (889mm) Downflow electrical connections can be made from top or bottom of unit.
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 Notes: Filters are accessible through top of unit only. Downflow electrical connections can be made 24-3/8" from top or bottom of unit.
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) 56-7/8" Opening (1445mm) Notes: Filters are accessible through top of unit only. Downflow electrical 24-3/8" connections can be made (619mm) from top or bottom of unit.
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) 80" Opening (2032mm) Notes: Filters are accessible through top of unit only. Downflow electrical connections can be made 24-3/8" Opening from top or bottom of unit.
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) Notes: Filters are accessible only through top of unit. Downflow electrical connections can be made from top or bottom of unit.
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 33" (838mm) Notes: Filters are accessible through top of unit only. Downflow electrical connections can be made from top or bottom of unit.
Liebert DS Dimensions and Weights Figure 12 Cabinet and floor planning dimensions—downflow, air-cooled, 105kW (30 ton), all compressor models Second Refrigerant Piping Entrance 102-13/16"Opening (2611mm) 33" (838mm) 35" (889mm) Notes: Filters are accessible only through top of unit. Downflow electrical connections can be made from top or bottom of unit.
Liebert DS Dimensions and Weights Figure 13 Cabinet and floor planning dimensions—downflow, water/glycol/GLYCOOL, 105kW (30 ton), all compressor models Condenser Cleanout Access 102-13/16" Opening (2611mm) 33" (838mm) 35" (889mm) Air Inlet Opening Notes: Filters are accessible only through top of unit. Downflow electrical connections can be made from top or bottom of unit.
Liebert DS Dimensions and Weights Figure 14 Cabinet and floor planning dimensions—upflow, air-cooled 28-42kW (8-12 ton), semi-hermetic compressor models Alternate Refrigerant Piping Entrance 33" (838mm) 35" (889mm) 3/4" (19mm) Bezels Top View High Volt Connection(s) Low Volt Connection(s) Minimum required for blower replacement 86" (2184mm) 1-1/2" (38mm) 24" (610mm) 76" (1930mm) 34" (864mm) Shaded area indicates a recommended minimum clearance for component access.
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 TOP VIEW High Volt Connection(s) Low Volt Connection(s) Minimum required for blower replacement 73" (1854mm) 1-1/2" (38mm) 24" (610mm) 76" (1930mm) 34" (864mm) Shaded area indicates a recommended minimum clearance for component access.
Liebert DS Dimensions and Weights Figure 16 Cabinet and floor planning dimensions—upflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton), all compressor models Condenser Cleanout 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.
Liebert DS Dimensions and Weights Figure 17 Cabinet and floor planning dimensions—upflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic compressor models Alternate Refrigerant Piping Entrance 33" (838mm) 35" (889mm) 3/4" (19mm) Bezels Top View High Volt Connection(s) 109" (2769mm) 1-1/2" (38mm) Minimum required for blower replacement Low Volt Connection(s) 24" (610mm) 76" (1930mm) 34" (864mm) 108" (2743mm) Front View 2" (51mm) Shaded area indicates a recommended minimum clearance for component
Liebert DS Dimensions and Weights Figure 18 Cabinet and floor planning dimensions—upflow, air-cooled, 53-77kW (15-22 ton), scroll or digital scroll compressor models Alternate Refrigerant Piping Entrance 33" (838mm) 35" (889mm) 3/4" (19mm) Bezels High Volt Connection(s) Top View Minimum required for blower replacement Low Volt Connection(s) 98" (2489mm) 1-1/2" (38mm) 24" (610mm) 76" (1930mm) 34" (864mm) 97" (2464mm) Front View 2" (51mm) Shaded area indicates a recommended minimum clearance fo
Liebert DS Dimensions and Weights Figure 19 Cabinet and floor planning dimensions—upflow, water/glycol/GLYCOOL, 53-77kW (15-22 ton), all compressor models 33" (838mm) 3/4" (19mm) Required for Bezels condenser cleanout 35" (889mm) Alternate Condenser Fluid Piping Entrance Top View Minimum required for blower replacement Low Volt Connection(s) High Volt Connection(s) 109" (2769mm) 1-1/2" (38mm) 24" (610mm) 76" (1930mm) 34" (864mm) 2" (51mm) 108" (2743mm) Front View Shaded area indicates a recom
Liebert DS Dimensions and Weights Figure 20 Cabinet and floor planning dimensions—upflow, air-cooled, 105kW (30 ton), all Alternate Refrigerant Piping Entrance 33" (838mm) 35" (889mm) High Volt Connection(s) 3/4" (19mm) Bezels TOP VIEW Low Volt Connection(s) Minimum required for blower replacement 132" (3353mm) 1-1/2" (38mm) 24" (610mm) 76" (1930mm) 34" (864mm) 2" (51mm) 131" (3327mm) Shaded area indicates a recommended minimum clearance for component access.
Liebert DS Dimensions and Weights Figure 21 Cabinet and floor planning dimensions—upflow water/glycol/GLYCOOL 105kW (30 ton), all compressors Alternate Refrigerant Piping Entrance 33" (838mm) 35" (889mm) Alternate Condenser Fluid Piping Entrance 3/4" (19mm) Bezels TOP VIEW Required for condenser cleanout Low Volt Connection(s) High Volt Connection(s) Minimum required for blower replacement 132" (3353mm) 1-1/2" (38mm) 24" (610mm) 76" (1930mm) 2" (51mm) Shaded area indicates a recommended minimum
Liebert DS Dimensions and Weights Figure 22 Floor stand dimensions—downflow, 28-42kW (8-12 ton) models A+1-1/2" (38mm) (with feet) A 47-15/16" (1218mm) B 4-1/2" (114mm) 33" (838mm) 16-3/4" (425mm) 34-1/2" (876mm) (with feet) Supply air discharge opening Supply air discharge opening 1" (25mm) TYP. Gussets supplied on floor stands 12" (305 mm) tall and greater Optional turning vane shown as front air discharge.
Liebert DS Dimensions and Weights Figure 23 Floor stand dimensions—downflow, 53-77kW (15-22 ton) models A+1-1/2" (38mm) (with feet) A 69-3/4" (1772mm) B 4-1/2" (114mm) 34-1/2" (876mm) (with feet) 16-3/4" (425mm) Supply air discharge opening 33" (838mm) Supply air discharge opening 1" (25mm) TYP. Gussets supplied on floor stands 12" (305 mm) tall and greater 7/8" (23mm) Optional turning vane shown as front air discharge.
Liebert DS Dimensions and Weights Figure 24 Floor stand dimensions—downflow, 105kW (30 ton) models 132-1/2" (3366mm) (with feet) 131" (3327mm) 91-3/4" (2330mm) 26" (660mm) 4-1/2" (114mm) 16-3/4" (425mm) 34-1/2" (876mm) (with feet) 33" (838mm) 1" (25mm) TYP. Supply air discharge opening Supply air discharge opening Gussets supplied on floor stands 12" (305 mm) tall and greater Optional turning vane shown as front air discharge.
Liebert DS Dimensions and Weights Figure 25 Blower outlet and deck dimensions—upflow, 28-42kW (8-12 ton) Top of Unit 72" (1829mm) or 85" (2159mm) Ref Blower Outlet * E C Blower Deck 1-1/2” (38mm) D A 35" (889 mm) Ref B Blower Outlet Location – Top View 76" Ref (1930 mm) Front or Rear Throw Air Supply Front of Unit * Duct flange not provided Table 22 Models DPN001120 Rev.
Liebert DS Dimensions and Weights Figure 26 Blower outlet and deck dimensions—upflow, 53-77kW (15-22 ton) 98" (2489mm) or 109" (2769mm) Blower F Outlets* C E A A B 35" (889mm) Ref B Front of Unit Blower Outlet Location – TOP VIEW * Duct Flanges Not Provided TOP OF UNIT Blower Deck D 1-1/2" (38mm) 76" (1930mm) Ref DPN001191 Rev. 3 Front or Rear Air Throw Supply Table 23 Blower outlet and deck dimensions for upflow, 53-77kW (15-22 ton) Dimensions, in.
Liebert DS Dimensions and Weights Figure 27 Blower outlet and deck dimensions—upflow 105kW (30ton) 132" (3353mm) Blower Outlets * G A A B F C E A B 35" (889mm) Ref B Front of Unit Blower Outlet Location – TOP VIEW * Duct Flanges Not Provided Top of Unit Blower Deck D 1-1/2" (38mm) 76" (1930mm) Ref DPN001192 Rev. 0 Front or Rear Throw Air Supply Table 24 Blower outlet and deck dimensions—upflow 105kW (30ton) Dimensions, in.
Liebert DS Dimensions and Weights Figure 28 Rear return filter box dimensions Filter Access Door Filter Access Door 7-15/16" (202mm) 76" 40" (1930mm) (1016mm) 38-1/4" (971mm) Duct Size 3-1/2" (89mm) D Duct Size C B A NOTES: 1. Filters can be accessed from either side. 2. 25" (635mm) minimum clearance provided on one side for filter access. 3. Filter boxes are shipped flat and must be field assembled. Table 25 DPN001196 Rev.
Liebert DS Dimensions and Weights Figure 29 Upflow unit plenum dimensions Rear Views – Check One (1): Front Views – Check One (1): With Grille With Grille Panel removable for condenser cleanout access (water/glycol / GLYCOOL models only) Without Grille 34" (864mm) Left Side Views – Check One (1): B Without Grille Right Side Views – Check One (1): A 1" (25mm) H With Grille With Grille 76" (1930mm) Without Grille Without Grille Side View – Unit With Plenum Front View – Unit With Plenum Notes
Equipment Inspection and Handling 5.0 EQUIPMENT INSPECTION AND HANDLING Upon arrival of the unit and before unpacking it, verify that the labeled equipment matches the bill of lading. Carefully inspect all items for damage, either visible or concealed. For initial access use a 7/32" Allen wrench for panel removal. Damage should be immediately reported to the carrier and a damage claim filed with a copy sent to Emerson Network Power or to your sales representative. 5.
Equipment Inspection and Handling Figure 30 Equipment recommended for handling Liebert DS Pallet Jack Forklift Spreader Bars and Slings Piano Jacks If possible, transport the Liebert DS with a forklift or pallet jacks. If that is not possible, use a crane with belts or cables, slings and spreader bars. • If using a forklift or pallet jack, make sure that the forks (if adjustable) are spread to the widest allowable distance that will fit under the skid.
Equipment Inspection and Handling 5.2.1 Removing the Unit from the Skid With a Forklift 1. Align a forklift with either the front or rear side of the unit. ! WARNING Risk of improper moving. Can cause equipment damage, injury or death. Use the center of gravity indicators on the unit to determine the entry points for the tines (see Figure 34). The center of gravity varies depending on the unit size and selected options.
Equipment Inspection and Handling 5.2.2 Moving the Unit to the Installation Location with Piano Jacks 1. With the Liebert DS elevated, place two piano jacks into position—one at either end of the unit. 2. Lower the unit to a height suitable for the piano jacks and place protective material between the Liebert DS and the piano jacks. 3. Secure the unit to the piano jacks and remove the forklift. 4. Use the piano jacks to move the unit for installation.
Equipment Inspection and Handling 5.2.4 Removing Liebert DS from Skid Using Rigging ! WARNING Risk of improper moving. Can cause equipment damage, injury or death. Use the center of gravity indicators (see Figure 34) on the unit to determine the position of the slings. The center of gravity varies depending on the unit size and selected options. The forklift’s tines must be equally spaced on either side of the center of gravity indicator. 1.
Equipment Inspection and Handling Figure 35 Using rigging to lift Liebert DS off skid Lifting Sling Lifting Sling Equal Distance Equal Distance 181659P1 Rev.
Equipment Inspection and Handling 5.3 Semi-Hermetic Compressor Spring Isolation System Shipping blocks under all semi-hermetic compressors must be removed and the springs must be adjusted before startup. 1. Loosen nuts at each of the four compressor feet and remove the two shipping blocks. 2. Beginning with one compressor foot, retighten nut until the washer under the nut can no longer be rotated by finger. 3. Loosen the nut half a turn. The washer will be slightly loose. 4.
Disassembling the Liebert DS for Transport 6.0 DISASSEMBLING THE LIEBERT DS FOR TRANSPORT The Liebert DS has a modular frame construction that allows separating the unit into three sections. Each of these sections is more easily maneuvered through tight spaces or placed in small elevators. A qualified service technician with the required tools and recommended assistance can disassemble an air-cooled unit in about four hours, assuming refrigerant evacuation is not required.
Disassembling the Liebert DS for Transport NOTICE 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. Do not lay the compressor section on its side. It must remain upright. The coil section also must remain upright. Label the three quick-connect plugs from the compressor compartment and disconnect them. Disconnect the compressor wire harness, including the crankcase heater wires, if present, from the contactor in the electric box. Pull the conduit and wires into the compressor compartment.
Disassembling the Liebert DS for Transport 19. Cut the insulation and pull it back from the piping. 20. Cut the refrigerant piping with a tubing cutter; if there is no Schrader fitting, let the nitrogen bleed out before cutting all the way through the pipe. NOTE Emerson does not recommend unsweating refrigerant connections. 21. Unsweat or cut all copper water pipes that interconnect unit sections. 22.
Disassembling the Liebert DS for Transport 6.3 Reassembly—Downflow Units 1. Replace the top section. Make sure to clear the Schrader valves on the coil header. 2. Reconnect the filter and electric box assembly to the blower and coil assembly using threadcutting bolts. Torque the bolts to 225 in-lb. (25Nm) 3. Reattach the evaporator top cover plate; there are eight screws on each side. 4. Reattach the filter support plate to the filter and electric box assembly; there is one screw on each side. 5.
Disassembling the Liebert DS for Transport 6.4 Reassembly Checklist ___ 1. Thread-cutting bolts reconnected and torqued to 225 in-lb. (25Nm) ___ 2. Top cover plate attached to coil ___ 3. Filter plate attached ___ 4. High-voltage wires connected to proper contactors: ___ a. Compressor ___ b. Fan motor ___ c. Reheat, if applicable ___ d. Humidifier, if applicable ___ e. Condensate pump, if applicable ___ 5. Low-voltage wires connected ___ a. Actuator ___ b. Terminal strip ___ c.
Disassembling the Liebert DS for Transport Figure 37 Component dimensions—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressor models Filter & Electric Box Assembly 39" (991mm) 76" (1930mm) Assembled Height Blower & Coil Assembly Compressor Assembly 76" (1930mm) 60-3/16" (1529mm) 37" (940mm) 33" (838mm) 26" (660mm) 59" (1499mm) 85" (2159mm) Assembled Length NOTES: Drawing views are simplified with panels removed to show overall dimensions.
Disassembling the Liebert DS for Transport Figure 38 Component dimensions—downflow, air-cooled, 28-42kW (8-12 ton), scroll/digital scroll compressor models Filter & Electric Box Assembly 39" (991mm) 76" (1930mm) Assembled Height Blower & Coil Assembly Compressor Assembly 76" (1930mm) 60-3/16" (1529mm) 37" (940mm) 33" (838mm) 13" (330mm) 59" (1499mm) 72" (1829mm) Assembled Length NOTES: Drawing views are simplified with panels removed to show overall dimensions.
Disassembling the Liebert DS for Transport Figure 39 Component dimensions—downflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton), all compressor models Filter & Electric Box Assembly 39" (991mm) 76" (1930mm) Assembled Height Blower & Coil Assembly Compressor Assembly 76" (1930mm) 60-3/16" (1529mm) 37" (940mm) 33" (838mm) 26" (660mm) 59" (1499mm) 85" (2159mm) Assembled Length NOTES: Drawing views are simplified with panels removed to show overall dimensions.
Disassembling the Liebert DS for Transport Figure 40 Component dimensions—downflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic compressor models Filter & Electric Box Assembly 39" (991mm) Compressor Assembly 76" (1930mm) Assembled Height Blower & Coil Assembly 76" (1930mm) 59-7/16" (1509mm) 37" (940mm) 33" (838mm) 26" (660mm) 82" (2083mm) 108" (2743mm) Assembled Length NOTES: Drawing views are simplified with panels removed to show overall dimensions.
Disassembling the Liebert DS for Transport Figure 41 Component dimensions—downflow air-cooled, 53-77kW (15-22 ton), scroll/digital scroll compressor models Filter & Electric Box Assembly 39" (991mm) Compressor Assembly Blower & Coil Assembly 76" (1930mm) 76" (1930mm) Assembled Height 59-7/16" (1509mm) 37" (940mm) 15" (381mm) 82" (2083mm) 97" (2464mm) Assembled Length NOTES: Drawing views are simplified with panels removed to show overall dimensions.
Disassembling the Liebert DS for Transport Figure 42 Component dimensions—downflow water/glycol, GLYCOOL, 53-77kW (15-22 ton), all compressor models Filter & Electric Box Assembly 39" (991mm) Compressor Assembly 76" (1930mm) Assembled Height Blower & Coil Assembly 76" (1930mm) 59-7/16" (1509mm) 37" (940mm) 33" (838mm) 26" (660mm) 82" (2083mm) DPN000932 Rev. 1 108" (2743mm) Assembled Length NOTES: Drawing views are simplified with panels removed to show overall dimensions.
Disassembling the Liebert DS for Transport Figure 43 Component dimensions—downflow, air-cooled, 105kW (30 ton), semi-hermetic compressor models Filter and Electric Box Assembly 39" (991mm) 41-11/16" (1059mm) Compressor Assembly 76" 1930mm Assembled Height Blower and Coil Assembly 76" (1930mm) 59-7/16" (1510mm) 37" (940mm) 33" (838mm) Table 33 105" (2667mm) 26" (660mm) 131" (3327mm) Assembled Length DPN001057 Rev.
Disassembling the Liebert DS for Transport Figure 44 Component dimensions—downflow, air-cooled, 105kW (30 ton), scroll compressor models Filter & Electric Box Assembly 41-11/16" (1059mm) 39" (991mm) Compressor Assembly Blower & Coil Assembly 76" (1930mm) 76" 1930mm Assembled Height 59-7/16" (1510mm) 37" (940mm) 33" (838mm) 105" (2667mm) 26" (660mm) 131" (3327mm) Assembled Length NOTES: Drawing views are simplified with panels removed to show overall dimensions.
Disassembling the Liebert DS for Transport Figure 45 Component dimensions—downflow, water/glycol/GLYCOOL, 105kW (30 ton), all compressor models Filter & Electric Box Assembly 39" (991mm) 41-11/16" (1059mm) Compressor Assembly 76" (1930mm) Assembled Height Blower & Coil Assembly 76" (1930mm) 59-7/16" (1510mm) 37" (940mm) 33" (838mm) 26" (660mm) 105" (2667mm) DPN001060 Rev. 0 131" (3327mm) Assembled Length NOTES: Drawing views are simplified with panels removed to show overall dimensions.
Disassembling the Liebert DS for Transport 6.5 Disassembly—Upflow Units For detailed views of upflow units, see Figures 46 through 54. 1. Remove the unit from its skid. 2. Remove all panels except top front accent. 3. Remove all filters on front return units. This allows easier access to items located in the filter and coil assembly. 4. All wires are hot stamped and all circuit board connectors are lettered for easy replacement. Cable ties will need to be cut and replaced as necessary.
Disassembling the Liebert DS for Transport 19. Immediately cap off and seal all piping that has been cut, including the suction and liquid lines, the humidifier supply line and the condensate discharge line (if applicable), as well as fluid piping on GLYCOOL and dual-cool units. 6.5.1 Remove Compressor Assembly 1. Secure the compressor wire harness to the compressor assembly. 2. Remove the 10 thread-cutting bolts holding compressor section together. a.
Disassembling the Liebert DS for Transport 6.6 Reassembly—Upflow Unit 1. Reattach the top section using thread-cutting bolts; there are four on each side. Torque the bolts to 225 in-lb (25Nm). 2. Reinstall the motor access plate. Do not replace the left end coil access plates until brazing is finished. 3. Reattach the compressor section. Insert all compressor thread-cutting bolts before tightening them all down. 4. Reinstall the pull bar to support the accent panel. 5.
Disassembling the Liebert DS for Transport Figure 46 Component dimensions—upflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressor models Blower & Electric Box Assembly 31-1/4" (794mm) Compressor Assembly Filter & Coil Assembly 76" (1930mm) Assembled Height 76" (1930mm) 45-13/16" (1163mm) 59" (1499mm) 85" Assembled Length (2159mm) NOTES: Drawing views are simplified with panels removed to show overall dimensions. See disassembly and handling instructions in installation manual.
Disassembling the Liebert DS for Transport Figure 47 Component dimensions—upflow, air-cooled, 28-42kW (8-12 ton), scroll/digital scroll compressor models Blower & Electric Box Assembly 31-1/4" (794mm) Compressor Assembly Filter & Coil Assembly 76" (1930mm) Assembled Height 76" (1930mm) 45-13/16" (1163mm) 59" (1499mm) 72" (1829mm) Assembled Length NOTES: Drawing views are simplified with panels removed to show overall dimensions. See disassembly and handling instructions in installation manual.
Disassembling the Liebert DS for Transport Figure 48 Component dimensions—upflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton), all compressor models Blower & Electric Box Assembly 31-1/4" (794mm) Compressor Assembly 76" (1930mm) Assembled Height Filter & Coil Assembly 76" (1930mm) 45-13/16" (1163mm) 33" (838mm) 26" (660mm) 59" (1499mm) 85" (2159mm) Assembled Length NOTES: Drawing views are simplified with panels removed to show overall dimensions.
Disassembling the Liebert DS for Transport Figure 49 Component dimensions—upflow, air-cooled, 53-77kw (15-22 ton), semi-hermetic compressor models Blower & Electric Box Assembly 31-1/4" (794mm) Compressor Assembly Filter & Coil Assembly 76" (1930mm) Assembled Height 76" (1930mm) 45-13/16" (1163mm) 33" (838mm) 26" (660mm) 82" (2083mm) 108" (2743mm) Assembled Length NOTES: Drawing views are simplified with panels removed to show overall dimensions.
Disassembling the Liebert DS for Transport Figure 50 Component dimensions—upflow, air-cooled, 53-77kw (15-22 ton), scroll/digital scroll compressor models Blower & Electric Box Assembly 31-1/4" (794mm) Compressor Assembly Filter & Coil Assembly 76" (1930mm) Assembled Height 76" (1930mm) 45-13/16" (1163mm) 33" (838mm) 15" (381mm) 82" (2083mm) 97" (2464mm) Assembled Length NOTES: Drawing views are simplified with panels removed to show overall dimensions.
Disassembling the Liebert DS for Transport Figure 51 Component dimensions—upflow water/glycol/GLYCOOL 53-77kw (15-22 ton), all compressor models Blower & Electric Box Assembly 31-1/4" (794mm) Compressor Assembly 76" (1930mm) Assembled Height Filter & Coil Assembly 76" (1930mm) 45-13/16" (1163mm) 33" (838mm) 26" (660mm) 82" (2083mm) 108" (2743mm) Assembled Length NOTES: Drawing views are simplified with panels removed to show overall dimensions.
Disassembling the Liebert DS for Transport Figure 52 Component dimensions—upflow, air-cooled, 105kW (30 ton), semi-hermetic compressor models Blower & Electric Box Assembly 31-1/4" (794mm) Compressor Assembly Filter & Coil Assembly 76" (1930mm) Assembled Height 76" (1930mm) 45-13/16" (1164mm) 33" (838mm) 26" (660mm) 105" (2667mm) 131" (3327mm Assembled Length NOTES: Drawing views are simplified with panels removed to show overall dimensions.
Disassembling the Liebert DS for Transport Figure 53 Component dimensions—upflow, air-cooled, 105kW (30 ton), scroll/digital scroll compressor models Blower & Electric Box Assembly 31-1/4" (794mm) Compressor Assembly 76" (1930mm) Assembled Height Filter & Coil Assembly 76" (1930mm) 45-13/16" (1164mm) 33" (838mm) 26" (660mm) 131" (3327mm Assembled Length 105" (2667mm) NOTE: Drawing views are simplified with panels removed to show overall dimensions.
Disassembling the Liebert DS for Transport Figure 54 Component dimensions—upflow, water/glycol/GLYCOOL, 105kW (30 ton), all compressor models Blower & Electric Box Assembly 31-1/4" (794mm) Compressor Assembly 76" (1930mm) Assembled Height Filter & Coil Assembly 76" (1930mm) 45-13/16" (1164mm) 33" (838mm) 26" (660mm) 131" (3327mm Assembled Length 105" (2667mm) NOTES: Drawing views are simplified with panels removed to show overall dimensions.
Electrical Connections 7.0 ELECTRICAL CONNECTIONS Three-phase electrical service is required for all models. Electrical service must conform to national and local electrical codes. Refer to equipment nameplate regarding wire size and circuit protection requirements. Refer to electrical schematic when making connections. Refer to Figure 55 for electrical service entrances into unit. A manual electrical disconnect switch should be installed in accordance with local codes and distribution system.
Electrical Connections Figure 55 Electrical field connections 2 IntelliSlot Housing 13 4 5 OVERLOAD PROTECTORS 14 A B C D P64 P67 6 CONTACTORS 60 Hz 12 CONTACTORS & RELAYS DOWNFLOW 3 6 50 Hz 1 DOWNFLOW LOW VOLT SECTION Note: Typical orientation of components shown. Component location varies by option and unit size.
Electrical Connections 7.1 Electrical Field Connection Descriptions Standard Electrical Connections 1. Primary high-voltage entrance—2-1/2" (64mm); 1-3/4" (44mm); 1-3/8" (35mm) diameter concentric knockouts located in bottom of box. 2. Secondary high-voltage entrance—2-1/2" (64mm); 1-3/4" (44mm); 1-3/8" (35mm) diameter concentric knockouts located in top of box. 3. Primary low-voltage entrance—Three 1-1/8" (28mm) diameter knockouts in bottom of unit. 4.
Electrical Connections Optional Low Voltage Terminal Package Connections 20. Remote unit shutdown - Two additional contact pairs available for unit shutdown (labeled as 37B and 38B, 37C and 38C). Replace jumpers with field-supplied, normally closed switch having a minimum 75VA, 24VAC rating. Use Class 1 field-supplied wiring. 21. Common alarm—On any alarm, two additional normally open dry contacts are closed across terminals 94 and 95 and 96 and 97 for remote indication. 1A, 24VAC max load.
Piping 8.0 PIPING All fluid and refrigeration connections to the unit, with the exception of the condensate drain, are sweat copper. Factory-installed piping brackets must not be removed. Field-installed piping must be installed in accordance with local codes and must be properly assembled, supported, isolated and insulated. Avoid piping runs through noise-sensitive areas, such as office walls and conference rooms.
Piping Figure 56 Gravity drain for downflow and upflow units DOWNFLOW DS UNIT UPFLOW DS UNIT INTERNAL DRAIN UNIT EXTERNAL DRAIN INTERNAL DRAIN UNIT EXTERNAL DRAIN CONTINUOUS DOWNWARD SLOPE CORRECT CORRECT UNIT CONTINUOUS DOWNWARD SLOPE INTERNAL DRAIN EXTERNAL DRAIN INTERNAL DRAIN UNIT DO NOT EXTERNALLY TRAP THE UNIT EXTERNAL DRAIN INCORRECT DO NOT EXTERNALLY TRAP THE UNIT INCORRECT INTERNAL DRAIN UNIT EXTERNAL DRAIN INTERNAL DRAIN UNIT EXTERNAL DRAIN THESE ARE EXTERNAL TRAPS ALSO, ALT
Piping 8.1.2 Humidifier Supply Water—Optional Infrared • 1/4" supply line; maximum water pressure is 150 psi (1034kPa) • Size humidifier supply line for 1 gpm (3.8 l/m), with a minimum water pressure of 20 psi (138kPa) • Do not supply de-ionized water to the humidifier 8.1.
Piping Leak Checking of Unit and Field Piping Liebert unit fluid systems are factory-checked for leaks and may be shipped with a nitrogen holding charge. Liebert unit fluid circuits should be checked for leaks at installation as described below. NOTE During leak checking of field-installed piping, Emerson recommends that the unit be isolated using field-installed shutoff valves. When the Liebert units are included in a leak test, use of fluid for pressure testing is recommended.
Piping 8.2.
Piping Table 47 O.D. Line charges - refrigerant per 100 ft (30m) of Type “L” copper tube Liquid Line, lb (kg) 1/2" 7.3 (3.3) 5/8" 11.7 (5.3) 7/8" 24.4 (11.1) 1-1/8" 41.6 (18.9) Table 48 Outdoor condenser approximate refrigerant charge lb (kg) per circuit Model Fan Speed Lee-Temp (includes receiver) 165 5 (2.3) 27 (12.3) 205 7 (3.2) 38 (17.2) 251 10 (4.6) 38 (17.20 308 11 (5.0) 58 (26.3) 415 15 (6.8) 75 (34.0) 510 30 (13.6) 149 (67.
Piping 8.3 Dehydration/Leak Test and Charging Procedures for R-407C and R-22 8.3.1 Air-Cooled Condenser with Fan Speed Head Pressure Control System The Fan Speed Control system uses a pressure activated electronic fan speed control system and remotely located thermostat(s) to ensure operation at ambient temperatures as low as 0°F (-18°C). Fan Speed Control Piping Two discharge lines and two liquid lines must be field-installed between the indoor unit and the outdoor condenser.
Piping Fan Speed Charging 1. Check unit nameplate for refrigerant type to be used. Unit control configurations differ depending on refrigerant type. 2. Refrigerant charging requires unit operation. Refer to 10.0 - Checklist for Completed Installation. 3. Calculate the amount of charge for the system. Refer to the unit, condenser and refrigerant line charge data in Tables 46, 47 and 48. 4. Weigh in as much of the system charge as possible before starting the unit.
Piping 8.3.2 Air-Cooled Condenser with Lee-Temp “Flooded Condenser” Head Pressure Control System The Lee-Temp system consists of a modulating type head pressure control valve and insulated receivers with heater pads to ensure operation at ambient temperatures as low as -30°F (-34.4°C). Lee-Temp Piping Two discharge lines and two liquid lines must be field-installed between the indoor unit and the outdoor condenser. See Figures 57 and 59 for details.
Piping 8. After four hours, check the pressure readings and, if they have not changed, break vacuum with dry nitrogen. Pull a second (R-407C and R-22) and third (R407C only) vacuum to 250 microns or less. Recheck the pressure after two hours. After completing this step, proceed to Fan Speed Charging on page 79. 9. Remove the jumper hose installed previously from between the service valve fitting and the condenser. After completing this step, proceed to Lee-Temp Charging. Lee-Temp Charging 1.
Piping Schematics 9.0 PIPING SCHEMATICS Figure 57 Piping schematic—air-cooled, semi-hermetic compressor models Relief Valve Service Check Valve Valve Liquid Lee-Temp Receiver Inverted trap on discharge and liquid lines to extend above base of coil by a minimum of 7-1/2” (190mm).
Piping Schematics Figure 58 Piping schematic—air-cooled, scroll compressor models Check Valve Inverted trap on discharge & liquid lines to extend above base of coil by a minimum of 7-1/2” (190mm).
Piping Schematics Figure 59 Piping schematic—water/glycol, semi-hermetic compressor models For systems with drycoolers, refer to 12.11.3 - Drycooler Settings.
Piping Schematics Figure 60 Piping schematic—water/glycol with scroll compressor models For systems with drycoolers, refer to 12.11.3 - Drycooler Settings.
Piping Schematics Figure 61 Piping schematic—GLYCOOL semi-hermetic compressor models For systems with drycoolers, refer to 12.11.3 - Drycooler Settings.
Piping Schematics Figure 62 Piping schematic—GLYCOOL with scroll compressor models For systems with drycoolers, refer to 12.11.3 - Drycooler Settings.
Piping Schematics Figure 63 Piping schematic—water/glycol with digital scroll compressor models LIEBERT HEAT REJECTION CUSTOMER HEAT REJECTION DRYCOOLER (Glycol) COOLING TOWER AND PUMP SYSTEM BY OTHERS Optional Dual Pump System shown EXPANSION TANK** GLYCOL PUMPS Check Valves* (on Dual Pump Systems only) Pressure Port* Gate Valves* Aquastat Sensing Bulbs Hose Bib* Shut-Off Valve* Air Vents (typical)*** Pressure Port* Flow Switch Supplied with Dual Pump Systems LIEBERT DS UNIT (and associated p
Piping Schematics Figure 64 GLYCOOL with digital scroll compressor models LIEBERT HEAT REJECTION Optional Dual Pump System shown EXPANSION TANK** GLYCOL PUMPS Check Valves* (on Dual Pimp Systems only) Gate Valves* Pressure Port* DRYCOOLER (Glycol) Aquastat Sensing Bulb Hose Bib* Shut-Off Valve* Air Vents (typical)*** Pressure Port* Flow Switch Supplied with Dual Pump Systems Flow-Regulating Valve* Shut-Off Valve* LIEBERT DS UNIT (and associated piping) ECON-O-COIL LIQUID 28-42kW Digital Sole
Piping Schematics Figure 65 Optional piping schematic for Econ-O-Coil Return Supply Return Supply Thermistor * Thermistor * Actuator Actuator Return Return Supply Supply Econ-O-Coil Optional Econ -O-Coil (2-Way Valve) Econ-O-Coil Optional Econ-O-Coil (3-Way Valve) Factory Piping * Supplied with 10 feet (3m) extra thermistor wire for installation Field Piping on field supply line. Note: 1. Place thermistor in location where flow is always present . 2.
Piping Schematics Figure 66 Primary connection locations—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressor models NOTE: Drawing not to scale. Tolerance on all piping dimensions is ±1/2" (13mm) A A Front View All dimensions from rear corner of unit , including panels X Section A-A Blower Outlet 4" (102mm) L1 L2 G1 G2 16-1/16" (408mm) R 16-7/16" (418mm) O Y B 35" (889 mm) ECS LV1 LV2 LV3 HUM E1 E2 ECR CD FRONT OF UNIT 86" (2184 mm) Point Description DPN000803 Rev.
Piping Schematics Figure 67 Primary connection locations—downflow, air-Cooled, 28-42kW (8-12 ton) with scroll compressor models Note: Drawing not to scale Tolerance on all A piping dimensions is ± 1/2" (13mm) Section A-A O Y 16-1/16" (408mm) Blower Outlet R 4" (102 mm) A Front View All dimensions from rear corner of unit including panels X B L1 L2 G1 G2 11-3/16" (284mm) 35" (889 mm) ECS LV1 LV2 LV3 HUM E1 E2 CD ECR Front of Unit 73" (1854mm) Point X inches (mm) Y inches (mm) Connecti
Piping Schematics Figure 68 Primary connection locations—downflow water/glycol/GLYCOOL 28-42kW (8-12 ton), all compressor models Note: Drawing not to scale Tolerance on all piping dimensions is ± 1/2" (13mm) A All dimensions from rear corner of unit including panels X A Front View Section A-A 8" (203mm) Blower Outlet W WS WR 3-1/2" (89mm) O Y 16-1/16" (408mm) B 35" (889mm) ECS LV1 LV2 LV3 HUM E1 E2 CD ECR Front of Unit 86" (2184mm) DPN000900 Rev.
Piping Schematics Figure 69 Primary connection locations—downflow, air-Cooled, 53-77kW (15-22 ton), semi-hermetic compressor models Note: Drawing not to scale Tolerance on all piping dimensions A is ± 1/2" (13mm) All dimensions from rear corner of unit including panels A Front View X Section A-A Blower Outlet R 4" (102mm) L1 L2 16-1/16" (408 mm) Blower Outlet G1 G2 Y B1 B2 16-7/16" (418mm) LV1 LV2 LV3 HUM ECR CD Front of Unit 109" (2769mm) R 35" (889mm) ECS E1 E2 Point O Description
Piping Schematics Figure 70 Primary connection locations—downflow, air-Cooled, 53-77kW (15-22 ton) with scroll compressor models All dimensions from rear corner of unit including panels Note: Drawing not to scale Tolerance on all piping dimensions A is ± 1/2" (13mm) Blower Outlet R 4" (102mm) L1 L2 G1 A Front View Section A-A X O Blower Outlet 16-1/16" (408mm) Y G2 B1 B2 35" (889mm) ECS 12-3/16" (310mm) LV1 LV2 LV3 HUM ECR CD E1 E2 Front of Unit 98" (2489mm) Point R Description Refri
Piping Schematics Figure 71 Primary connection locations—downflow, water/glycol/GLYCOO,L 53-77kW (15-22 ton), all compressor models All dimensions from rear corner of unit including panels X Note: Drawing not to scale Tolerance on all piping dimensions is ± 1/2" (13mm) A A Front View Section A-A 3-1/2" (89mm) 8" (203mm) Blower Outlet W WS WR 16-1/16" (408mm) Blower Outlet B2 Y B1 ECS HUM ECR CD E1 E2 Point) Description) O 35" (889mm) LV1 LV2 LV3 Front of Unit 109" (2769mm) DPN000933 Rev.
Piping Schematics Figure 72 Primary connection locations—downflow, air-cooled, 105kW (30 ton), all compressor models A Note: Drawing not to scale Tolerance on all piping dimensions is ± 1/2" (13mm) 4" (102mm) 15-11/16" G1 G2 R (398mm) Section A-A Blower Outlet Blower Outlet B3 L1 L2 16-7/16" (418mm) A Front View All dimensions from rear corner of unit including panels X Y Blower Outlet B2 B1 LV1 LV2 LV3 CD E1 E2 Front of Unit 131" (3327mm) Point) R 35" (889mm) ECS ECR HUM Description) R
Piping Schematics Figure 73 Primary connection locations—downflow, air-cooled, 105kW (30 ton), all compressor models A Note: Drawing not to scale Tolerance on all piping dimensions is ± 1/2" (13mm) 8" (203mm) W WS WR 15-7/8" (403mm) 3-1/2" (89mm) Point E1 E2 Description) All dimensions from rear corner of unit including panels X Section A-A Blower Outlet 14-1/2" (368mm) ECS ECR Typ CD HUM A Front View Blower Outlet B3 O Y Blower Outlet B2 35" (889mm) B1 LV1 LV2 LV3 Front of Unit 131" (3
Piping Schematics Figure 74 Primary connection locations—upflow, air-cooled, 28-42kw (8-12 ton), semi-hermetic compressor models All dimensions from rear corner of unit including panels 22-1/2" (572mm) NOTES: 1. Drawing not to scale. 2. Tolerance on all piping dimensions is ± 1/2" (13mm). 15-3/16" Field-routed alternatives for refrigerant 35" (386mm) gas and liquid line connection points. (889mm) See submittal page DPN001120 for 4" blower outlet and deck dimensional data.
Piping Schematics Figure 75 Primary connection locations—upflow, air-Cooled, 28-42kW (8-12 ton), semi-hermetic compressor models NOTES: 1. Drawing not to scale. 2. Tolerance on all piping dimensions is ±1/2" (13mm). 3. Field-routed alternatives for refrigerant gas and liquid line connection points. 4. See submittal page DPN001120 for blower outlet and deck dimensional data. All dimensions from rear corner of unit including panels X 10-1/8" (257mm) 4-1/8" (105mm) 3.
Piping Schematics Figure 76 Primary connection locations—upflow, water/glycol/GLYCOOL, 28-42kW (8-12 ton), all compressor models NOTES: 1. Drawing not to scale. 2. Tolerance on all piping dimensions is ± 1/2" (13mm). 3. Field-routed alternatives for water/glycol connections. 4. See submittal page DPN001120 for blower outlet and deck dimensional data.
Piping Schematics Figure 77 Primary connection locations—upflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic compressor models All dimensions from rear corner of unit including panels 22-1/2" (572mm) NOTES: 15-3/16" 1. Drawing not to scale. 35" (386mm) 2. Tolerance on all piping dimensions (889mm) is ± 1/2" (13mm). 4" 3. Field routed alternatives for refrigerant (102mm) gas and liquid line connection points. 4. See submittal page DPN001191 for blower outlet and deck dimensional data.
Piping Schematics Figure 78 Primary connection locations—upflow, air-cooled, 53-77kW (15-22 ton), scroll compressor models All dimensions from rear corner of unit including panels NOTE 4" 1. Drawing not to scale. (102mm) 2. Tolerance on all piping dimensions 35" is ±1/2" (13mm). 4" (102mm) 3. Field-routed alternatives for refrigerant (889mm) gas and liquid line connection points. 12-13/16" 4. See submittal page DPN001191 for (325mm) blower outlet and deck dimensional data.
Piping Schematics Figure 79 Primary connection locations—upflow, water/glycol/GLYCOOL, 53-77kW (15-22 ton), all compressor models NOTE 1. Drawing not to scale. 2. Tolerance on all piping dimensions is ±1/2" (13mm). 3. Field-routed alternatives for water/glycol connections. 4. See submittal page DPN001191 for blower outlet and deck dimensional data.
Piping Schematics Figure 80 Primary connection locations—upflow, air-cooled, 105kW (30 ton), all All dimensions from rear corner of unit including panels 22-1/2" (572mm) 35" (889mm) 15-3/16" (386mm) 4" (102mm) NOTES: 1. Drawing not to scale. 2. Tolerance on all piping dimensions is ± 1/2" (13mm). 3. Field routed alternatives for refrigerant gas and liquid line connection points. 4. See submittal page DPN001192 for blower outlet and deck dimensional data.
Piping Schematics Figure 81 Primary connection locations—upflow, water/glycol/GLYCOOL, 105kW (30 ton), all All dimensions from rear corner of unit including panels 35" (889mm) Blower Outlet 8" (203mm) Blower Outlet 2-7/8" (73mm) 3-1/2" (89mm) LV1 LV3 NOTES: 1. Drawing not to scale. 2. Tolerance on all piping dimensions is ± 1/2" (13mm). 3. Field routed alternatives for water/glycol connections. 4. See submittal page DPN001192 for blower outlet and deck dimensional data.
Checklist for Completed Installation 10.0 CHECKLIST FOR COMPLETED INSTALLATION 10.1 Moving and Placing Equipment ___ 1. Unpack and check received material. ___ 2. Proper clearance for service access has been maintained around the equipment. ___ 3. Equipment is level and mounting fasteners are tight. ___ 4. If the equipment has been disassembled for installation, unit must be reassembled per instructions. 10.2 Electrical ___ 1. Supply voltage and phase matches equipment nameplate. ___ 2.
Initial Startup Checks and Commissioning Procedure for Warranty Inspection 11.0 INITIAL STARTUP CHECKS AND COMMISSIONING PROCEDURE FOR WARRANTY INSPECTION ! 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. Follow all local codes.
Initial Startup Checks and Commissioning Procedure for Warranty Inspection 11.1 Information for Warranty Inspection—Remove Power From Unit Disconnect Complete the following items on the warranty inspection form: • • • • • • • • • • • 11.
Initial Startup Checks and Commissioning Procedure for Warranty Inspection 11.3 Commissioning Procedure With Panels On 1. Disconnect all power to the environmental control unit and check. 2. Remove all line voltage fuses except the main fan fuses and the control voltage fuses in the electric panel. (Use iCOM to activate loads). 3. Turn on power to the unit and check line voltage on main unit disconnect switch. Line voltage must be within 10% of nameplate voltage. 4.
Maintenance 12.0 MAINTENANCE ! 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. Follow all local codes. ! WARNING Risk of improper wiring, piping, moving, lifting and handling. Can cause equipment damage, injury or death.
Maintenance 12.1.1 Filter Replacement Procedure—Downflow Units 1. Disconnect power from the Liebert DS. 2. Using a stepladder, remove filters from the top of the unit. The optional downflow return air plenum includes a filter access door. 3. Replace with new filters—install the filters in the proper direction of the airflow (see Figure 82). 4. Test the operation of the filter clog switch. The unit panels must be in place and closed to find this point. 5.
Maintenance 12.2.1 Upflow Motor Access 1. Remove the lateral support (sheet metal channel) under electric box by removing two screws at each end. 2. Removed the hinged deadfront panel (30-ton units have open access to the motor). 3. Remove two screws on the right side of the low-voltage electric box that secure the low volt electric box to the sheet metal shoulder. 4. Swing open low-voltage electric box to gain access to the motor.
Maintenance Figure 84 Auto-belt tensioning motor base Spring Housing Motor Base Carriage Minimum 1/2” (13mm) Gap Motor Plate Adjustment Slot Adjustment Nut DPN000995 Rev. 0 Blower Bearing Maintenance • Field lubrication is NOT required for the life of the bearing. • Bearings are permanently sealed and self-lubricating and cannot be greased. Blower Bearing Inspection 1. 2. 3. 4. 5. Disconnect power to unit. Remove drive belts (see 12.2.2 - Belt Removal).
Maintenance 12.3 Humidifier 12.3.1 Infrared Humidifier During normal humidifier operation, deposits of mineral solids will collect in humidifier pan and on the float switch. These must be cleaned periodically to ensure proper operation. Frequency of cleaning must be locally established since it is dependant on humidifier usage and local water quality. A spare pan is recommended to reduce maintenance time at unit.
Maintenance 12.3.3 Changing Humidifier Lamps NOTE Touching quartz lamps with bare hands will severely shorten bulb life. Skin oils create hot spots on lamp surface. Wear clean cotton gloves when handling lamps. 1. Remove humidifier pan (see 12.3.2 - Cleaning Humidifier Pan and Float Switch, Steps 1 through 10). 2. Disconnect power from unit. 3. At humidifier, remove screws and cover from high-voltage compartment. 4. Disconnect one end of purple jumper wires. 5.
Maintenance 12.5 Air-Cooled Condenser and Drycoolers • • • • • • • 12.6 Clear coil surface of all debris that will inhibit airflow. Check for bent or damaged coil fins and correct. Do not permit snow to accumulate around or under outdoor unit. Periodically consider commercial cleaning of coil surface Inspect fans, motors and controls for proper operation. Check all piping and capillaries for proper support. Inspect for leaks.
Maintenance 12.8 Compressor Replacement Replacement compressors are available through your local Emerson office. Compressors are shipped in reusable packaging. If unit is under warranty, complete and include Liebert Service Credit Application (LSCA) with the compressor that is being returned. The original compressor should be returned in the same packaging. 12.8.1 Compressor Motor Burnout If a burnout has occurred, a full system clean-out is required; if not, compressor and system problems will continue.
Maintenance 12.10 Paradenser—Water-Cooled Condenser During normal Paradenser operation, deposits will collect on inside wall of condenser tubes. It must be cleaned periodically to ensure proper operation. Frequency of cleaning must be locally established because it varies according to Paradenser usage and local fluid quality. See 12.9 - Facility Fluid and Piping Maintenance. 12.10.1 Cleaning Instructions Refer to Figure 1 - Downflow model component locations. 1. Disconnect power to unit. 2.
Maintenance To lower the head pressure setting, turn the square adjusting screw clockwise until the high pressure gauge indicates the desired setting. To raise the head pressure setting, turn the adjusting screw counterclockwise until the desired setting is obtained. Consult the factory if your unit is equipped with valves from other manufacturers. Testing Function of Valve First, turn off the refrigeration system.
Maintenance 12.11.3Drycooler Settings Applications with the Optional Stat Setting require field piping to be insulated to prevent condensation. Table 57 shows acceptable applications where stats must be adjusted to Optional Setting. Aquastats must be field-adjusted to Optional Setting for: • GLYCOOL/Dual Cool applications • Single Drycooler loops with motor ball valve flow controls (motor ball valves are used on all Liebert DS units with digital compressors).
HVAC Maintenance Checklist 13.0 HVAC MAINTENANCE CHECKLIST Inspection Date Job Name Indoor Unit Model # Indoor Unit Serial Number # Condenser/Drycooler Model # Condenser/Drycooler Serial # Room Temperature/Humidity ° % Ambient Temperature Filters ___ 1. Check/replace filters ___ 2. Grille area unrestricted ___ 3. Wipe section clean ___ 4. Coil clean Blower Section ___ 1. Blower wheels free of debris ___ 2. Check belt tension and condition (replace if needed) ___ 3. Check/lube bearings ___ 4.
HVAC Maintenance Checklist Condensate Pump ___ 1. Check for debris in sump ___ 2. Check operation of float(s) (free movement) Refrigeration Piping ___ 1. Check refrigerant lines (clamps secure/no rubbing/leaks) ___ 2. Check for moisture (sight glass) Water-Cooled Condensers ___ 1. Check water regulating valve operation ___ 2. Cap tubes (not rubbing) ___ 3. Check for water/glycol leaks ___ 4. Entering water temperature ______________ ° ___ 5. Leaving water Compressor Section ___ 1. Check oil level ___ 2.
HVAC Maintenance Checklist Air-Cooled Condenser / Drycooler ___ 1. Coil clean ___ 2. Motor mounts tight ___ 3. Bearings in good condition (motor) ___ 4. Piping support/clamps secure ___ 5. Check wire connections ___ 6. Stat settings ___ 7. Refrigerant level (Lee-Temp) ___ 8. Glycol level ___ 9. Glycol solution___________________________ % ___ 10. Fan speed control operation ___ 11.
Ensuring The High Availability Of Mission-Critical Data And Applications. Emerson Network Power, the global leader in enabling business-critical continuity, ensures network resiliency and adaptability through a family of technologies—including Liebert power and cooling technologies—that protect and support business-critical systems. Liebert solutions employ an adaptive architecture that responds to changes in criticality, density and capacity.
