Liebert DS manuale d’uso

Precision Cooling For Business -Critic al C ontinuity™ Li eber t ® DS ™ User Ma nual 28-105kW , 8-30 T ons, Upflow an d Down flow , 50/60Hz[...]

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i T ABLE OF CONTENTS I MPORT ANT S AFETY I NSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 SAVE THESE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.0 L IEBERT DS C OMPO NENT S AND N OMENCLATURE . . . . . . . . . . . . .[...]

ii 7.0 E LECTRICAL C ONNECTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 7.1 Electrical Field Connection Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 8.0 P IPING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

iii 12.5 Air-Cooled Condenser and Drycoolers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 12.6 Reheat—Electric Reheat (Three-Stage and SCR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117 12.7 Compressor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .[...]

iv FIGURES Figure 1 Downflow model co mponent locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Figure 2 Upflow model co mponent locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Figure 3 Liebert DS model number nomenclature. . . [...]

v Figure 37 Component dimensions—d ownflow, air- cooled, 28-42kW (8-12 ton), semi -hermetic compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 Figure 38 Component dimensions—d ownflow, air-cool ed, 28-42kW (8-12 ton), scroll/digita l scroll compressor [...]

vi Figure 70 Primary connection locations—downflow, air-Cooled, 53- 77kW (15-22 ton) w ith scroll compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 Figure 71 Primary connection locations—downflow , water/glycol/GLY COO,L 53-77kW (15-22 ton), all compr[...]

vii TA B L E S Table 1 Shipping dimensio ns—domestic and export, inches (mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 2 Shipping weights—approxim ate, kg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Table 3 Weights for downflow, air-c ooled, 28-42kW (8-12 ton), [...]

viii Table 43 Component weights—upflow , air-cooled, 105kW (30 ton), s croll/digital scroll compressor models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 Table 44 Component weights—upfl ow, water/glyco l/GLYCOOL, 105kW (30 ton), all compressor[...]

1 I MPORT ANT S AFETY I NSTRUCTIONS SAVE THESE INSTRUCTIONS This manual co ntains important safe ty instructions that sh ould be followe d during the installa tion and maintenance of the Liebert DS ™ . Read this manual thoroughly be fore attempting to install or operate this unit. Only qualif ied personnel s hould move, install or service this eq[...]

2 ! WARNING Risk of high-speed moving part s. Can cause injury or death. Disconnect all local and remote electric po wer supplies before working in the unit. Do not operate upflow units without instal ling a plenum, ductwork or guard over the blower opening(s) on the top su rface of the unit cabinet. Ductwork must be connected to the blower(s), or [...]

Liebert DS Components and Nomenclature 3 1.0 L IEBERT DS C OMPONENTS AND N OMENCLATU RE Figure 1 Downflow model component locations 11 9 2 4 16 10 12 6 8 7 13 1 3 14 5 15 10. Infrared Humidifier , optional 1 1. Disconnect, optional 12. Condensate Pump, optional 13. Smoke Sensor , optional 14. Condenser Cleanout Plugs, fluid-cooled units only 15.Con[...]

Liebert DS Components and Nomenclature 4 Figure 2 Upflow model componen t locations 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) 1 1. Disconnect (optional) 12. Condensate Pump (optional) 13. Smoke Sensor (opti[...]

Liebert DS Components and Nomenclature 5 Figure 3 Liebert DS model number nomenclature 1 D 2 S 3 0 4 3 5 5 7 U 6 A 8 A 9 0 10 3 11 I 12 * 13 * 14 * 15 * Air Dist ribution DS = Downflow St andard VS = Upflow S t andard Nominal kW 028,035, 042, 053, 070, 077, 105 Cooling T ype A = Air-Cooled D = Dual-Cooling, Air-Cooled W = W ater/Glycol K = GL YCOOL[...]

Cooling Configura tions 6 2.0 C OOLING C ONFIGURATIONS NOTE All field-instal led piping must comply with applicable local, state and federal codes. Air-Cooled Air-cooled unit piping is spun clos ed from the factory and contain a nitrogen holding charge. Each installation requires refriger ant piping to a cond enser . Glycol-Cooled Glycol-cooled uni[...]

Pre-Installation Guidelines 7 3.0 P RE -I NST ALLATION G UIDELINES 3.1 Room Prep aration • Verify that the floor is level, solid and su fficient to support the unit. See Table 2 for u nit weights. • Confirm that the room is properl y insulated and has a sealed vapor barrier. • For proper humidity control, ke ep outside or fresh air to an abs [...]

Pre-Installation Guidelines 8 3.3 Air Distribution—Up flow Units Various configurations are available: • Front return • Rear return •T o p - f r o n t s u p p l y • Top-rear suppl y For in-room appli cations with supply and return grilles, severa l feet of clearance must be maintained at the intake and discharge of the unit. Upflow rear-r[...]

Pre-Installation Guidelines 9 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 GL YCOOL units utilizing a drycool er may require an optional aquastat setting. See Tables 58 throug h 57 aquastat setting guideli[...]

Liebert DS Dimensio ns and Weights 10 4.0 L IEBERT DS D IMENSIONS AND W EIGHTS T able 1 S hipping dimensions—dom estic and export, inches (mm) Model Number 028 / 035 / 042 053 / 070 / 077 105 L x W x H, in (mm) L x W x H, in (mm) L x W x H, in (mm) DS/VSAS, DS/VSAD, DS/VSAR, DS/VSAG, DS/VSDS, DS/VSDD, DS/VSDR, DS/VSDG 90 x 42 x 82 (2286 x 106 7 x[...]

Liebert DS Dimensio ns and Weights 11 Figure 6 Cabinet and floor planning dime nsions—downflow , air-cooled, 28-42kW (8-12 ton), semi-hermetic co mpressor models T able 3 Weight s for downflow , air-cooled, 28 -42kW (8-12 ton), semi- hermetic compressor models Model No. Dry Weight - lb. (kg), Approximate 028, 035, 042 Air-Cooled 1780 (809) Dual-C[...]

Liebert DS Dimensio ns and Weights 12 Figure 7 Cabinet and floor planning dime nsions—d ownflow , air-cooled, 28-42kW (8-12 ton), scroll compressor models T able 4 Weight s for downflow , air-cooled, 28 -42kW (8-12 ton), scr oll compressor models Dry Weight, lb (kg), Approximate Model No. 028, 035, 042 Air-Cooled 1470 (668) Dual-Cool 1620 (736) S[...]

Liebert DS Dimensio ns and Weights 13 Figure 8 Cabinet and floor planning dimensions—dow nf low , water/glycol/GL YCOOL, 28-42kW (8-12 ton), all compressor models T able 5 Weight s for downflow , water/glycol/GL YCOOL, 28-42 kW (8-12 ton), all compressor models Compressor Type Dry Weight - lb. (kg), Approximate Model 028, 035, 042 Semi-Hermetic C[...]

Liebert DS Dimensio ns and Weights 14 Figure 9 Cabinet and floor planning dime nsi ons—downflow , air-cooled, 53-77kW (15-22 ton), semi-hermetic compressor models T able 6 Weight s for downflow , air-cooled, 53-77kW (15-22 ton), semi- hermetic compressor mo dels Model Dry Weight, lb (kg) Approximate 053 070 077 Air-Cooled 2350 (1069) 2400 (1091) [...]

Liebert DS Dimensio ns and Weights 15 Figure 10 Cabinet and floor planning dime nsions—d ownflow , air-cooled, 53-77kW (15-22 ton) , scroll compressor models T able 7 Weight s for downflow , air-cooled, 53-7 7kW (15-22 ton), scroll compre ssor models Model No. Dry Weight, lb (kg) Approximate 053 070 077 Air-Cooled 1920 (873) 1970 (896) 2020 (919)[...]

Liebert DS Dimensio ns and Weights 16 Figure 1 1 Cabinet and floor planning dime nsi ons—downflow , water/glycol/GL YCOOL, 53-77kW (15-22 ton), all compress or models T able 8 Weight s for downflow , water/glycol/GL YCOOL, 53-77 kW (15-22 ton), all compressor models Compressor Type Model Dry Weight, lb (kg), Approximate 053 070 077 Semi-Hermetic [...]

Liebert DS Dimensio ns and Weights 17 Figure 12 Cabinet and floor plannin g dimensions—dow nflow , air-cooled, 105kW (30 ton), all compresso r models T able 9 Weight s for downflow , air-Cooled, 105kW (30 ton), all compress or models Compressor Type Dry Weight, lb (kg) approximate Model 105 Semi-Hermetic Compressor Air-Cooled 3040 (1382) Dual-Coo[...]

Liebert DS Dimensio ns and Weights 18 Figure 13 Cabinet and floor planning dime nsions—d ownflow , water/glycol/GL YCOOL, 105kW (30 t on), all compressor models T able 10 W eight s for downflow , water/glycol/GL YCOOL, 105kW (30 ton), all compressor models Compressor Type Dry Weight, lb (kg) approximate Model 105 Semi-Hermetic Compressor W ater/G[...]

Liebert DS Dimensio ns and Weights 19 Figure 14 Cabinet and floor planning dime nsions—up f low , air-cooled 28-42kW (8-12 ton), semi-he rmetic compressor models T able 1 1 Weight for upf low , air-cooled, 28-4 2kW (8-12 ton), semi- hermetic compressor models Model No. Dry Weight, lb (kg) approximate 028-042 Air-Cooled 1830 (830) Dual-Cool 1980 ([...]

Liebert DS Dimensio ns and Weights 20 Figure 15 Cabinet and floor planning dime nsions—up flo w , air-cooled 2 8-42kW (8-12 ton), scroll o r digit al scroll compressor models T able 12 W eight for up flow, air- cooled, 28-42kW (8-1 2 to n), scroll or digit al scroll compressor models Model No. Dry Weight, lb (kg) approximate 028-042 Air-Cooled 15[...]

Liebert DS Dimensio ns and Weights 21 Figure 16 Cabinet and floor planning d imensions—up f low , water/glyco l/GL YCOOL, 28-42k W (8-12 ton), all compressor models T able 13 W eight s for upflow , water/glycol/GL YCOOL, 28-42kW (8-12 ton), all compressor mode ls Compressor Type Dry Weight, lb (kg) approximate Model 028-042 Semi-Hermetic Water/Gl[...]

Liebert DS Dimensio ns and Weights 22 Figure 17 Cabinet and floor planning dimensions—up flo w , air-cooled, 53-77kW (15-22 ton) , semi-hermetic compressor models T able 14 W eights for up flow, air- cooled, 53-77kW (1 5-22 ton), semi- hermetic compressor mo dels Model Dry Weight, lb (kg) approximate 053 070, 077 Air -Cool ed 2350 (1069) 2500 (11[...]

Liebert DS Dimensio ns and Weights 23 Figure 18 Cabinet and floor planning dimen sions—up flow , air-cooled, 53-77kW (15-22 ton) , scroll or digit al scroll compressor models T able 15 W eight for up flow, air-cooled , 53-77kW (15-22 ton) , scroll or digit al scroll compressor models Model No. Dry Weight, lb (kg) approximate 053, 070, 077 Air-Coo[...]

Liebert DS Dimensio ns and Weights 24 Figure 19 Cabinet and floor plannin g dimensions—u p flow , water/ glycol/GL YCO OL, 53-77kW (15-22 ton), all compressor models T able 16 W eight s for upflow , water/glycol/GL YCOOL, 53-77kW (15-22 ton), all compressor models Compressor Type Dry Weight, lb (kg) approximate Model 053 070 , 077 Semi-Hermetic C[...]

Liebert DS Dimensio ns and Weights 25 Figure 20 Cabinet and floor planning dime nsio ns—up flow , air-cooled, 105kW (30 ton), all T able 17 W eight s—upflow , air- cooled, 105k W (30 ton), all Dry Weight, Approximate, lb (kg) Model 105 Semi- Hermetic, Air-Cooled 3000 (1361) Semi-Hermetic, Dual-Cool 3330 (1510) Scroll or Digital Scroll, Air-Cool[...]

Liebert DS Dimensio ns and Weights 26 Figure 21 Cabinet and floor plannin g dimensions—u p flow water/glycol/GL YCOOL 105kW (30 ton), all compressors T able 18 W e ight s—upflow wa ter/glycol/GL YCOOL 105kW ( 30 ton), all compressors Model 105 Semi-Hermetic Compressor Water/Glycol 3370 (1529) GLYCOOL/Dual-Cool 37 00 (1678) Scroll or Digital Scr[...]

Liebert DS Dimensio ns and Weights 27 Figure 22 Floor st and dimensions—downflo w , 28-42kW (8- 12 ton) models T able 19 Floo r stan d and floor planning dimens ions—downflow , 28-42kW ( 8-12 ton) models Dimensions, in. (m m) Height, in. (mm) Model A B C * D Turning Vane Air-Cooled Semi-Hermetic Models and All Water/Glycol/GL YCOOL Models 85 (2[...]

Liebert DS Dimensio ns and Weights 28 Figure 23 Floor st and dimensions—downf low , 53-77kW (15 -22 ton) models T able 20 Floo r stan d and floor planning dimens ions—downflow , 53-77kW (15-22 ton) models Dimensions, in. (mm) Height, in. (mm) Model A B C * D Turning Vane Air-Cooled Semi-Hermetic Models and All Water/Glycol/GLYCOOL Models 108 (2[...]

Liebert DS Dimensio ns and Weights 29 Figure 24 Floor st and dimensions—downf low , 105kW (30 ton ) models T able 21 Floo r stan d and floor planning dime nsions—downflow , 105kW (30 t on) models Height, in. (mm) C * D turning vane 9 (229) 4 (111) 12 (305) 7 (187) 15 (381) 10 (264) 18 (457) 13 (340) 21 (533) 16 (416) 24 (610) 19 (492) D DPN0010[...]

Liebert DS Dimensio ns and Weights 30 Figure 25 Blower outlet and deck dimensions —up flow , 28-42kW (8-12 ton) T able 22 Dime nsions for up flow , 28-42kW (8-12 ton) Models Blower Supply A B C D E 28-42kW (8-12 ton) 15 x 15 Front Throw 15-7/8" (404mm) 18-5/8" (472mm) 2-1/8" (54mm) 25-5/8" (651mm) 25" (635mm) Rear Throw 1[...]

Liebert DS Dimensio ns and Weights 31 Figure 26 Blower outlet and deck dimensions —up flow , 53-77kW (15-22 ton) T able 23 Blower outlet and deck dimensions f or up flow , 53-77kW (15-22 ton) Models Blower Supply Dimensions, in. (mm) ABC DE F 53-77kW (15-22 ton) 15 x 15 Front Throw 15-7/8" (404mm) 18-5/8" (472mm) 2-1/8" (54mm) 27-3[...]

Liebert DS Dimensio ns and Weights 32 Figure 27 Blower outlet and deck dimensions —up flow 105kW (30to n) T able 24 Blowe r outlet and deck dimensions—up flow 105kW (30ton) Models Blower SUPPLY Dimensions, in. (mm) ABC D E F G 105kW (30 ton) 15 x 11 Front Throw 15-7/8 (404) 14-11/16 (373) 2-1/8 (54) 25-5/8 (651) 30-3/4 (781) 54-1/2 (1384) 78-1/[...]

Liebert DS Dimensio ns and Weights 33 Figure 28 Rear return filter box dimensions T able 25 Rear ret urn filter box dimensions Compressor Type Dimensions, in (mm) AB CD # F i l t e r s 28-42kW (8-12 ton) Air-Cooled Scroll and Air-Cooled Digital Scro ll Models 4-1/4 (108) 50-3/4 (1289) 18 (457) 47-5/8 (1210) 4 28-42kW (8-12 ton) Semi-Hermetic and al[...]

Liebert DS Dimensio ns and Weights 34 Figure 29 Up flow unit plenum dimensions T able 26 Up flow unit plenum dimensions Plenum Dimensions, in (mm) Gr ille Size, in (mm) - Nominal A B H Front/Rear Grilles Side Gril le 28-42kW (8-12 ton) Air-Cooled Scroll and Air-Cooled Digi tal Scroll Models 59-1/4 (1505) 13-3 /4 (349) 20 (508) 18 x 55 (457 x 1397) [...]

Equipment Inspe ction and Handling 35 5.0 E QUIPME NT I NSPECTIO N AND H ANDLING Upon arrival of the u nit and before unpacking it, verif y that the labeled equipment ma tches the bill of lading. Carefully i nspect all items for damage, eith er visible or concealed. For initial access use a 7/32" Allen wrench for panel re mova l. Damage should[...]

Equipment Inspe ction and Handling 36 Figure 30 Equipment recommended for handling Liebert DS If possible, transport the Liebert DS with a forkli ft or pallet jacks. If that is not possible, u se a crane with belts or cables, slings an d spreader bars. • If using a f orklift or pallet jack, make sure that the forks (if adjustable ) are spread to [...]

Equipment Inspe ction and Handling 37 5.2.1 Removing the Unit from the Skid W ith a Forklif t 1. Align a forklift with eith er the front or rear side of the unit. 2. Insert the tines of the forklift comple tely under the base of the Liebert DS. 3. Remove the lag bolts from each bracke t holding the Liebert DS to the skid. 4. Lift the unit off the s[...]

Equipment Inspe ction and Handling 38 5.2.2 Moving the Unit to the Inst allation Location with Piano Jacks 1. With the Lieb ert DS elevated , place two pi ano ja cks into position—one at either end of the unit. 2. Lower the unit to a height suitable for the pian o jacks and place protective material between the Liebert DS and the pi ano jacks. 3.[...]

Equipment Inspe ction and Handling 39 5.2.4 Removing Liebert DS from Skid Using Rigging 1. Space the slings equidistant on either side of the center of gravity indicator (se e Figure 34 ). Figure 34 Locate center of gravity marker and place slings 2. Place the slings between the bottom rails of the Liebert DS and the top o f the skid. 3. Use spread[...]

Equipment Inspe ction and Handling 40 Figure 35 Using rigging to lif t Liebert DS off skid Equa l Distan ce Equa l Distan ce Lift ing Slin g Lifting Sling 181659P1 Rev . 5[...]

Equipment Inspe ction and Handling 41 5.3 Semi-Hermetic Compressor Spring Isolation System Shipping blocks under all semi-h ermetic compressors must be removed and the springs must be adjusted before startup. 1. Loosen nuts at each of the four compresso r feet and remove the two shi pping blocks. 2. Beginning with one compressor foot , retighten nu[...]

Disassembling the Liebert DS for Transport 42 6.0 D ISASSEMBLING THE L IEBERT DS FOR T RANSPORT The Liebert DS has a modular frame construction that allows separating the uni t into three sections. Each of these secti ons is more easily maneuver ed through tight spaces or placed in small elevators. A qualified service technician wi th the required [...]

Disassembling the Liebert DS for Transport 43 NOTICE Do not lay the compressor sectio n on its side. It must remain upright. The coil section also must remain upright. 5. Label the three qui ck-connect plugs from the com pressor compartment and disconnect them. 6. Disconnect the compressor wire harness, including the crankcase heater wires, if pres[...]

Disassembling the Liebert DS for Transport 44 19. Cut the insulation an d pull it back from the piping. 20. Cut the refrig erant piping with a tubing cutter; if there is no Schrader fitting, let the nitrogen bleed out before cutting al l the way through the pipe. 21. Unsweat or cut all copper wate r pipes that interconnect unit sections. 22. Immedi[...]

Disassembling the Liebert DS for Transport 45 6.3 Reassembly—Downflow Unit s 1. Replace the top section. Make sure to clear the Schrade r valves on the coil header. 2. Reconnect the filter and electr ic box assembly to th e blower and coil a ssembly using thread- cutting bolts. Torque the bolts to 225 in-lb. (25Nm) 3. Reattach the evapora tor top[...]

Disassembling the Liebert DS for Transport 46 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 conne cted to proper contactors: ___ a. Com pressor ___ b. Fan motor ___ c. Reheat, if applicable ___ d. Humidi[...]

Disassembling the Liebert DS for Transport 47 Figure 37 Component dimensions—downf low , air-cool ed, 28-4 2kW (8-12 ton), semi-herme tic compressor models T able 27 Compon ent weight s—downflow , air-c ooled, 28-42kW ( 8-12 ton), semi-hermetic Dry Weight, Approximate, Including Panels, lb (kg) Component Air-Cooled Dual-Cool Compressor Assembly[...]

Disassembling the Liebert DS for Transport 48 Figure 38 Component dimensions—downf low , air-cooled, 28-4 2kW (8-12 ton), scroll/digit al scroll compressor models T able 28 Compon ent weight s—downflow , air-cooled, 28-42kW (8-12 to n), scroll/digit al scroll Dry Weight, Approximate, lb. (kg) Component Air-Cooled Dual-Cool Compressor Assembly 4[...]

Disassembling the Liebert DS for Transport 49 Figure 39 Component dimensions—downflow , water/glycol/GL YCOOL, 28-42kW (8-12 ton), all compressor models T able 29 Compon ent weight s—downflow , water/glycol/GL YCOOL, 28-42kW (8-12 ton), all Dry Weight, Approximate, Including Panels, lb (kg) Component Semi-Hermetic Compressor Scroll or Digital S[...]

Disassembling the Liebert DS for Transport 50 Figure 40 Component dimensions—do wnflow , ai r-cooled, 53 -77kW (15-22 ton) , semi-hermetic compressor models T able 30 Compon ent weight s—downflow , air-cooled, 53-77kW ( 15-22 ton), semi-he rmetic Dry Weight, Approximate, Including Panels, lb (kg) Component Air-Cooled Dual-Cool Compressor Assemb[...]

Disassembling the Liebert DS for Transport 51 Figure 41 Component dimensions—do wnflow air-cool ed, 53-7 7kW (15-22 ton) , scroll/digit al scroll compressor models T able 31 Compon ent weight s—downflow , air-cooled, 53-77kW ( 15-22 ton), scroll/digit al scroll Dry Weight, Approximate, Including Panels, lb (kg) Component Air-Cooled Dual-Cool Co[...]

Disassembling the Liebert DS for Transport 52 Figure 42 Component dimensions—do wnflow water/glycol, GL YCOOL, 53-77kW ( 15-22 ton), all compressor models T able 32 Component weights—downf low water/glycol, GL YCOOL, 53-77kW (15-22 ton), all Liebert DS Section Semi-Hermetic Compressor Scroll Compressor Water/Glycol lb (kg) GLYCOOL Dual-Cool lb [...]

Disassembling the Liebert DS for Transport 53 Figure 43 Component dimensions—downf low , air-c ooled, 105kW (3 0 ton), semi-hermetic co mpressor models T able 33 Compon ent weight s—downflow , air-cool ed, 105kW ( 30 ton), semi-her metic compressors Component Dry Weight, lb (kg) Approximate (Includes Panels) Air Cooled Dual Cool Compressor Asse[...]

Disassembling the Liebert DS for Transport 54 Figure 44 Component dimensions—downf low , air-cooled, 105kW (3 0 ton), scroll compressor models T able 34 Compon ent weight s—downflow , air-cooled, 105kW (30 ton) , scroll compressor models Dry Weight, Approximate, Including Panels, lb (kg) Component Air-Cooled Dual-Cool Compressor Assembly 830 (3[...]

Disassembling the Liebert DS for Transport 55 Figure 45 Component dimensions—do wnflow , water/ glycol/GL YCOOL, 105kW (3 0 ton), all compressor models T able 35 Compon ent weight s—downflow , water/glycol/GL YCOOL, 105kW (30 ton), all compressor models Dry Weight, Approximate, Including Panels, lb (kg) Component Semi-Hermetic Compressor Scroll[...]

Disassembling the Liebert DS for Transport 56 6.5 Disassembly—Up flow Unit s 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 un its. This allo ws easier access to items located in the filter and coil assembly. 4. A[...]

Disassembling the Liebert DS for Transport 57 19. Immediately cap off and seal all piping that has been cut, including the suct ion and liquid lines, the humidifier su pply line and th e condensate discharge lin e (if applicable), as well as fluid pi ping on GLYCOOL and dual-cool units. 6.5.1 Remove Compressor Assembly 1. Secure the compressor wire[...]

Disassembling the Liebert DS for Transport 58 6.6 Reassembly—Up flow Unit 1. Reattach the top section using thread-cutt ing bolts; there are four on each side. Torque the bolts to 2 25 in-lb (25Nm). 2. Reinstall the motor access plate. Do not replace the left end coil access plates until brazing is finish ed. 3. Reattach the compressor section. I[...]

Disassembling the Liebert DS for Transport 59 Figure 46 Component dimensions—up flow, air-cool ed, 28-42kW (8-1 2 ton), semi-hermetic compres sor models T able 36 Compon ent weight s—up flow , air-cooled, 28-42kW ( 8-12 ton), semi-herme tic compressor models Dry Weight, Approximate, Including Panels, lb (kg) Component Air-Cooled Dual-Cool Compr[...]

Disassembling the Liebert DS for Transport 60 Figure 47 Component dimensions—up flow, air-c ooled, 28-42kW (8-12 ton ), scroll/digit al scroll compressor models T able 37 Compon ent weight s—up flow, air-cooled, 28-42kW ( 8-12 ton), scroll/digit al scroll compressor models Dry Weight, Approximate, Including Panels, lb (kg) Component Air-Cooled [...]

Disassembling the Liebert DS for Transport 61 Figure 48 Component dimensions—up flow, water/glycol/GL YCOOL, 28-42kW (8-12 ton), all compressor models T able 38 Compon ent weight s—up flow, wate r/glycol/GL YCOOL, 28-42kW (8-12 ton), all compressor models Dry Weight, Approximate, Including Panels, lb (kg) Component Semi-Hermetic Compres sor Scr[...]

Disassembling the Liebert DS for Transport 62 Figure 49 Component dimensions—up flow, air-cooled , 53-77kw (15-22 to n), semi-hermetic compres sor models T able 39 Compon ent weight s—up flow air-cooled 53- 77kw (15-22 t on), semi-hermetic compre ssor models Dry Weight, Approximate, Including Panels, lb (kg) Component Air-Cooled Dual-Cool Compr[...]

Disassembling the Liebert DS for Transport 63 Figure 50 Component dimensions—up flow, air-cool ed, 53-77kw (15 -22 ton) , scroll/digit al scroll compressor models T able 40 Compon ent weight s—up flow, air-cooled, 53-77kw (1 5-22 ton), scroll /digit al scroll compressor models Dry Weight, Approximate, Including Panels, lb (kg) Component Air-Coo[...]

Disassembling the Liebert DS for Transport 64 Figure 51 Component dimensions—up flow water/glyco l/GL YCOOL 53-77kw (15-22 ton), all compressor models T able 41 Component weight s—up flow water/glycol/G L YCOOL, 53-77kW (15-22 ton) all compressor models Dry Weight, Approximate, Including Panels, lb (kg) Component Semi-Hermetic Compressor S crol[...]

Disassembling the Liebert DS for Transport 65 Figure 52 Component dimensions—up flow, air-cool ed, 105kW (3 0 ton), semi-hermetic co mpressor models T able 42 Compon ent weight s—up flow , air-cooled, 105kW (30 t on), semi-hermetic compressor models Dry Weight, Approximate, Including Panels, lb (kg) Component Air-Cooled Dual-Cool Compressor Ass[...]

Disassembling the Liebert DS for Transport 66 Figure 53 Component dimensions—up flow, air-cooled, 105kW (30 to n), scroll/digit al scroll compressor models T able 43 Compon ent weight s—up flow , air-cooled, 105kW (30 t on), scroll/digit al scroll compresso r models Dry Weight, Approximate, Including Panels, lb (kg) Component Air-Cooled Dual-Co[...]

Disassembling the Liebert DS for Transport 67 Figure 54 Component dimensions—up flow, wat er/glycol/GL YCOOL, 105kW (30 ton), all compressor models T able 44 Compon ent weight s—up flow, wa ter/glycol/G L YCOOL, 105kW (30 ton), all compressor mode ls Dry Weight, Approximate, Including Panels, lb (kg) Component Semi-Hermetic Compressor Scroll or[...]

Electrical Connections 68 7.0 E LECTRICAL C ONNECTIONS Three-phase electrical service is required for all mo dels. Electrical servic e mu st conform to national and local electrical codes. Refer to equipment name plate regarding wire size and circuit protection requirements. Refer to electrical sche ma tic when making co nnections. Refer to Figure [...]

Electrical Connections 69 Figure 55 Electrical field connect ions 78 75 76 94 95 96 97 91 11 12 77 92 93 80 81 73 37C 38C 37B 38B 37 38 24 70 71 72 50 51 55 56 88 83 82 89 84 59 58 85 16 17 10 15 18 9 19 11 8 20 22 23 21 7 3 1 12 6 14 5 2 13 4 A B 6 3 IntelliSlot Housing 60 Hz OVERLOAD PROTECTORS CONT ACTORS CONT ACTORS & RELA YS 50 Hz Note: T [...]

Electrical Connections 70 7.1 Electrical Field Connection Descriptions St andard 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" (4 4mm); 1-3/8" (35[...]

Electrical Connections 71 Optional Low V olt age T erminal Package Connections 20. Remote unit shutdown - Two additional contact pa irs available for uni t shutdown (labeled as 37B and 38B, 37C and 38C). Replace jumpers wit h field-supplied, normally closed switch having a minimum 75VA, 24VAC rating. Use Class 1 field-supplied wiring. 21. Common al[...]

Piping 72 8.0 P IPING All fluid and refrigeration connecti ons to the unit, with the exception of th e condensate drain, are sweat copper. Facto ry-installed pipi ng brackets must not b e removed. Field-installed piping must be installed in accordance with loca l codes and must be properly assembled, supported, isolated and insulated. Avoid piping [...]

Piping 73 Figure 56 Gravity drain for downflow and up flow units Condensate Pump • 1/2" copper sweat connection is pro vided on units with optional factory-installed condensate pump • Condensate Pump (60Hz): Condensate pump is rated for approx imately 400 gph at 10 feet total head • Condensate Pump (50Hz): Condensate pump is rated for ap[...]

Piping 74 8.1.2 Humidifier Supply W ater—Optional Infrared • 1/4" supply l ine; maximum water pressure is 150 psi (1034kPa) • Size humidif ier supply line for 1 gpm (3.8 l/m), with a minimum water pressure of 20 psi (1 38kPa) • Do not supply de-ionized water to the humidifier 8.1.3 Requirement s of Systems Us ing W ater or Glycol These[...]

Piping 75 Leak Checking of Unit and Field Piping Liebert unit fluid syst ems are factory-chec ked for leaks and may be shipped wi th a nitrogen holding charge. Liebert un it fluid circuits should be checked for leaks at in stallation as describ ed below. 8.2 Refrigeration Piping NOTE During leak checking of field- installed piping, Emerson recommen[...]

Piping 76 8.2.1 Piping Guidelines—Air-Cooled Unit s • Indoor unit ships with a ni trogen holding cha rge; do not ve nt the evaporator until a ll refrigerant piping is in place, ready for connection to the unit and condenser • Use copper piping with high temperature brazed joints • Isolate piping from building using vibra tion-isolating supp[...]

Piping 77 T able 47 Line charges - refrigera nt per 100 f t (30m) of T ype “L” copper tube O.D. 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 ) T able 48 Out door condenser approximate refrigerant cha rge lb (kg) per circuit Model Fan Speed Lee-Temp (includes receiv er) 165 5 (2.3) 27[...]

Piping 78 8.3 Dehydration/Leak T est and Charging Procedur es 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 ac tivated electro nic fan speed control system and remotely located thermostat(s) to ensure operation at ambient temperatures as low a s 0°F (-18°C).[...]

Piping 79 Fan S peed Charging 1. Check unit nameplate for refri ger ant type to be used. Unit contro l configurations differ depending on refrigerant type. 2. Refrigerant ch arging requires un it operation. Refer to 10.0 - Checklist f or Completed Installation . 3. Calculate the amount of charge fo r the system. Refer to the unit, conden ser and re[...]

Piping 80 8.3.2 Air-Cooled Condenser with Lee-T emp “Flooded Condenser” Head Pressure Control System The Lee-Temp system consists of a modulating type head pressure control valve and insulated receiv- ers with heater pads to e nsure operation at ambient temperatures as low as -30°F (-34.4°C). Lee-T emp Piping Two discharge lines and two liqui[...]

Piping 81 8. After four hours, check the pres sure readings and, if they have not changed, br eak vacuum with dry nitrogen. Pull a second (R-4 07C 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 inst[...]

Piping Sche matics 82 9.0 P IPING S CHEMATICS Figure 57 Piping schematic—air-c ooled , semi-hermetic compressor models C ondens er C oil (Lee - Tem p ) C ondens er C oi l (F a n Sp e e d ) Ch e ck Va lve R elie f Valv e Se r v ice Va lve Li qui d Retur n H ead P res s ure Co n tr o l V a l ve Lee -Temp R ec eiv er Ho t G a s Di sch a r g e E v ap[...]

Piping Sche matics 83 Figure 58 Piping schematic—air-cooled, sc roll compressor models Lee - Tem p R ec ei v er Fan Speed Lee - Temp Servi ce Val ve Ext e r n al E qual i z er Liqui d S ens i ng Bu lb I nv ert ed t rap on di s c harge & l i qui d l ines t o ex t end abov e bas e of c oi l by a m i ni m um of 7 -1/ 2 ” (190 m m ). F ie ld in[...]

Piping Sche matics 84 Figure 59 Piping schematic—water/glyc ol, semi-hermetic compressor models Co m p r e sso r Muffle r Se rvice Val ve Cy l i nder Unl oader ( s ) E v ap orat or Co i l Not e : Sc hemat ic repr esent at ion shown . T hi s s c hem at i c does n ot i mpl y or def i ne ele v at i ons and c om ponent l oc at ion unles s s pec if i [...]

Piping Sche matics 85 Figure 60 Piping schematic—water/glyc ol with scroll compressor models COMPRESSOR CUS TO MER HEA T REJECTI ON COOLING TOWE R AND PUMP SYSTEM BY OTHERS RETURN SUPPL Y LIEBERT HEA T REJECTI ON DRYCOOLER (Glycol) Aquasta t Sensin g Bulbs EXPANSIO N TA N K * * Hose Bib* Shutof f V alve* Pressure Por t* Optional Dual Pump S ystem[...]

Piping Sche matics 86 Figure 61 Piping schematic—GL YCOOL semi-hermetic compressor models LIE BERT HEA T REJECTI ON DRYCOOLER (Glycol) Aquastat Sensing Bulbs Hose Bib* Shutoff V alve* EXP ANSION TA N K * * Pressure Por t* Optional Dual Pump S ystem shown GL YC OL PUMPS Check V a lves* (on Dual Pump Systems only) Gate V alves * Air V ents (typi ca[...]

Piping Sche matics 87 Figure 62 Piping schematic—GL YCOOL with scroll compressor models 3-Way Ch illed Glyco l Va lve 3-Way Chilled Glycol Va l v e NOTE: Sche matic re present ation show n. This schema tic does n ot imply or define ele vations and component loc ation, unless specifically noted. Service Va l v e * Components ar e not supplied by L[...]

Piping Sche matics 88 Figure 63 Piping schematic— water/glycol with digit al scroll compressor models Sensing Bulb CUST OMER HEA T REJECTI ON LIEBERT HEA T REJECT I ON LIEBERT DS U NIT (a nd ass ocia ted piping) COOLI NG TOWER AND PUMP SYSTEM BY OTHERS RETURN SUPPL Y EXP ANSION TA N K * * DRY COOLER (Glycol) GL YCO L PUMPS Optional Dual Pump S ys[...]

Piping Sche matics 89 Figure 64 GL YCOOL with digital scroll compres sor models PARADENS ER® CON DENSER LIEBERT HEA T REJECT I ON LIEB ERT D S U NIT (and asso ciated p ip ing ) DRY COOLER (Glycol) EXP ANSION TA N K * * GL YCOL PUMPS Aquastat Sensing Bulb Pressure Por t* Hose Bib* Shut-Off V alve* Shu t-Off V a lve* Optional Dual Pump S ystem shown[...]

Piping Sche matics 90 Figure 65 Optional piping schematic for Econ-O-Coil D P N000805 R ev. 1 * S upplied wit h 10 f eet (3 m) ext ra t herm ist or wire f or ins t al lat ion on f ield supply line . Not e : 1. Plac e t herm ist or in locat ion wher e f low is alway s pr es ent . 2 . T herm ist or m ust be l oc a t ed out of t he supply air s t ream[...]

Piping Sche matics 91 Figure 66 Primary connection locations—downflow , air-cooled, 28-42kW (8-12 t on), semi-he rmetic compressor models Point Description X inches (mm) Y inches (mm) Connection Size / Opening inches (mm) R Refrigerant Access 63 (1600) 13-13/16 (351) 1 6-7/16 x 4 (418 x 102) L1 Liquid Line System 1 79-3/16 (2011) 16-3/4 (425) 1/2[...]

Piping Sche matics 92 Figure 67 Primary connection locations—downflow , air-Cooled, 28-42kW (8-1 2 ton) with scroll compressor models Point Description X inches (mm) Y inches (mm) Connection Size / Opening inches (mm) R Refrige rant Access 59-5/16 (1507) 14- 3/4 (375) 11-3/16 x 4 (284 x 102) L1 Liquid Line System 1 69-15/16 (1776) 16-13/16 (411) [...]

Piping Sche matics 93 Figure 68 Primary connection locations—downflow water/glycol/GL YCO OL 28-42kW (8-12 ton ), all compressor models Point Description X inches (mm) Y inches (mm) Connection Size / Opening inches (mm) W Water/Glyco l/GLYCOOL Access 79-15/16 (2030) 9-1/16 (230) 3-1/2 x 8 (89 x 20 3) WS Water/Glycol/GLYCOOL Supply 82-15/16 (2107)[...]

Piping Sche matics 94 Figure 69 Primary connection locations—downflow , air-Cooled, 53-7 7kW (15-22 ton), semi-her metic compressor models Point Description X inches (mm) Y inches (mm) Connection Size / Opening inches (mm) R Refrigerant Access 82-3/4 (2102) 13-7/8 (352) 16-7/16 x 4 (418 x 102) 53kW (15ton) / 70 & 77kW (20 & 22ton) L1 Liqu[...]

Piping Sche matics 95 Figure 70 Primary connection locations—downflow , air-Cooled, 53-77kW (1 5-22 ton) with scroll compressor models Point Description X inches (mm) Y inches (mm) Connection Size / Opening inches (mm) R Refrigerant Access 81-3/4 (2076) 14-3/4 (374) 12-3 /16 x 4 (310 x 102) 53kW (15ton) / 70 & 77kW (20 & 22ton) L1 Liquid [...]

Piping Sche matics 96 Figure 71 Primary connection locations—downflow , water/glycol/GL YCOO,L 53-77kW (15-22 ton), all compressor models Point) Description) X inches (mm) Y inches (mm) Connection Size / Opening inches (mm) W Water/Glycol/GLYCOOL Access 103 (2616) 9 (229) 3-1/2 x 8 (89 x 203) WS Water/Glycol/GLYCOOL Supply 104-3/4 (2661) 11 (279)[...]

Piping Sche matics 97 Figure 72 Primary connection locations—downflow , ai r-cooled, 105kW (30 ton), a ll compressor models Point) Description) X inches (mm) Y inches (mm) Connection Size / Opening inches (mm) R Refrig erant Access 109 (2769) 15-3/4 (400) 16-7/16 x 4 (418 x 102) L1 Liquid Line System 1 121-3/4 (3092) 1 6-3/4 (425) 5/8 Cu Sweat L2[...]

Piping Sche matics 98 Figure 73 Primary connection locations—downflow , ai r-cooled, 105kW (30 ton), a ll compressor models Point Description) X inches (mm) Y inches (mm) Connection Size / Opening inches (mm) W Water/Glycol/GLYCOOL Access 125-15/16 (3199) 9 (22 9) 3-1/2 x 8 (89 x 203) WS Water/Glycol /GLYCOOL Supply 127-7/8 (3248) 10-1/16 (256) 2[...]

Piping Sche matics 99 Figure 74 Primary connection locations—up flow , air-cooled, 28- 42kw (8-12 ton), semi- hermetic compressor models Point Description X inches (mm) Y inches (mm) Connection Size / Opening inches (mm) R1 Refrigerant Access (Top) 60-11/16 (1542) 1-7/8 (48) 22-1/2 x 15-3/16 (572 x 386) R2 Refrigerant Access (Bottom) 63 (1600) 13[...]

Piping Sche matics 100 Figure 75 Primary connection locations—up flow , air-Cooled, 28-4 2kW (8-12 ton), semi-hermetic compressor models Point Description X inches (mm) Y inches (mm) Connection Size / Opening inches (mm) R1 Refrigerant Access (Top) 60-5/8 (1539) 2-13/16 (71) 10-1/8 x 4-1/8 (257 x 105) R2 Refrigerant Access (Bottom) 63 (16 00) 13-[...]

Piping Sche matics 101 Figure 76 Primary connection locations—up flow , water/glycol/GL YCOOL, 28-42kW (8-12 ton), all compressor models Point Description X in. (mm) Y in. (mm) Connection Size / Opening in. (mm) W1 Water/Glycol/GLYCOOL Access (Bottom) 79-15/16 (2030) 9 (229) 3-1/2 x 8 (89 x 203) W2 Water/Glycol/GLYCOOL Access (Top) 79-15/16 (2030[...]

Piping Sche matics 102 Figure 77 Primary connection locations—up flow , air-cooled, 53-77 kW (15-22 ton), semi-hermetic compressor models Point Description X inches (mm) Y inches (mm) Connection Size / Opening inches (mm) R1 Refrigerant Access (Top) 83-3/4 (21 27) 1 -7/8 (48) 22-1/2 x 15-3/1 6 (572 x 386) R2 Refrigerant Access (Bottom) 86 (2184) [...]

Piping Sche matics 103 Figure 78 Primary connection locations—up flow , air-cooled, 53-77kW (15-22 ton ), scroll compressor models Point Description X inches (mm) Y inches (mm) Connection Size / Opening inches (mm) R1 Refrigerant Access (Top) 83-5/8 (2124) 2 (51) 12 x 4 (305 x 102) R2 Refrigerant Access (Bottom) 82-3/4 (2102) 14-3/4 (374) 12-3/16[...]

Piping Sche matics 104 Figure 79 Primary connection locations—up flow , water/glycol/GL YCOOL, 53-77kW (15-22 ton) , all compressor models Point Description X inches (mm) Y inches (mm) Connection Size / Opening inches (mm) W1 W ater/Glycol/GL YC OOL Access (Bottom) 102-15/16 (2615) 9 (229) 3- 1/2 x 8 (89 x 203) W2 W ater/Glycol/GL YC OOL Access ([...]

Piping Sche matics 105 Figure 80 Primary connection locations—up flow , air-cooled, 105kW (30 ton), all T able 51 Piping data—up flow, air-cooled 105kW (30 ton) , all Point Description X Y Connection Size / Opening R1 Refrigerant Access (Top) 106-7/8 (2715) 1-7/8 (48) 22-1/2 x 15-3 /16 (572 x 386) R2 Refrigera nt Access (Bottom) 109-1/8 ( 277 2[...]

Piping Sche matics 106 Figure 81 Primary connection locations—up flow , water/glycol/GL YCOOL, 105kW (30 ton), all T able 52 Piping dat a—upflow , upflow , water/glycol/GL YCOOL, 1 05kW (30 t on), all Point Description X inches (mm) Y inches (mm) Connection Size / Opening, inches (mm) W1 Water/Glycol/GLYCOOL Access (Bo ttom) 126-1/8 (32 04) 9 ([...]

Checklist for Completed Installation 107 10.0 C HECKLIST FOR C OMPLETED I NSTALLATION 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 disassem[...]

Initial Startup Checks and Commissionin g Procedure for Warranty Inspection 108 11 . 0 I NITIAL S T ARTUP C HEC KS AND C OMMISSIONING P ROCEDUR E FOR W ARRANTY I NSPECTION • Confirm that all items on 10.0 - Chec klist for Co mpleted Installation have been done. • Locate “Liebert DS Warranty Inspection Check Sh eet” in unit electric panel. ([...]

Initial Startup Checks and Commissionin g Procedure for Warranty Inspection 109 1 1.1 Information for W arranty Inspection— Remove Power From Unit Disconnect Complete the following items on the warranty inspection form: • Installer and address • Owner and address • Site Contact name and phone • Installation da te • Indoor unit model and[...]

Initial Startup Checks and Commissionin g Procedure for Warranty Inspection 110 1 1.3 Commissioning Procedure With Panels On 1. Disconnect all power to the en vironmental control unit and check. 2. Remove all li ne voltage fuses except the main fan fuses and the control voltage fuses i n the electric panel. (Use i COM to activate loads). 3. Turn on[...]

Maintenance 111 12.0 M AINTENANCE The Liebert DS product is a single component in the facility heat removal s ystem. The system includes air distributio n (raised floors, duct systems), outdoor heat rejection (condense rs, pumps, dry- coolers, cooling towers, pi ping, heat rejection fluid, ambi ent temp erature, etc.) and indoor cooling and humidit[...]

Maintenance 112 12.1.1 Filter Re placement Procedure—Downflow Unit s 1. Disconnect power from the Liebert DS. 2. Using a stepladder, remov e filt ers from the top of the unit. The optional dow nflow return air ple num includ es a filt er access door. 3. Replace with new fi lters—install the filters in the proper di rection of the airflow (see F[...]

Maintenance 113 12.2.1 Up flow Motor Access 1. Remove the lateral suppo rt (sheet metal channel) under electr ic box by r emoving two screws at each end. 2. Removed the hinged deadfront panel (3 0-to n units have op en a ccess to the motor). 3. Remove two screws on the right side of the lo w -voltage electric box that secure the low v olt electric [...]

Maintenance 114 Figure 84 Auto-belt tensioning motor ba se Blower Bearing Maintenance • Field lub rication is NOT re quired for the li fe of the bearing. • Bearings are permanently sealed and self-lubri cating and cannot be greased. Blower Bearing Inspection 1. Disconnect power to unit. 2. Remove drive belts (see 12.2.2 - Belt Removal ). 3. Ins[...]

Maintenance 115 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 sw itch. These must be cleaned period ically to ensure proper operation. Frequency of cleaning must be locally est ablished since it is dependant on humidifier u sage and local wat[...]

Maintenance 116 12.3.3 Changing Humidifier Lamp s 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 humidifie r, remove screws and cover from high-voltage compartment. 4. Disconnect one end of purple jumper wires. 5. Using a continuity meter, locate burned ou[...]

Maintenance 117 12.5 Air-Cooled Condenser and Drycoolers • Clear coil surf ace of all debris th at will inhibit airflo w. • Check for bent or damaged coil fins and correct . • Do not permit snow to accumula te around or under outdoor unit. • Periodically consider commercial cleaning of coil surface • Inspect fans, motors and co ntrols for[...]

Maintenance 118 12.8 Compressor Replacement Replacement compressors are available th rough your local Emerson office. Compressors are shipped in reusable packaging. If u nit is under warranty, complete and in clude Liebert Service Credit A ppli- cation (LSCA) with the compressor that is be ing returned. The original compressor should be returned in[...]

Maintenance 119 12.10 Paradenser—W ater-Cooled Condenser During normal Paradenser operation, deposits will collect on inside wall of condenser tubes. It must be cleaned periodically to ensure proper opera tion. Frequency of cleaning must be locally established because it varies accordin g to Paradenser usage and l ocal fluid quality. See 12.9 - F[...]

Maintenance 120 To lower the head pressure setting, turn the square adjusting screw clockw ise until the high pressure gauge indicates the desired setting. To raise the head pressure setting, turn the adjusting screw coun- terclockwise unt il the desired setting is obtained. Consult th e factory if your unit is equipped with valves from other manuf[...]

Maintenance 121 12.1 1.3Drycooler Settings Applications with the Opti onal Stat Setting require field pipin g to be insulated to prevent condensa- tion. Table 57 shows acceptable applications where stats must be adjusted to Optional Setting. Aqu- astats must be field-adjuste d to Optional Setting for: • GLYCOOL/Dual Cool applications • Single D[...]

HV AC Maintenance Ch ecklist 122 13.0 HV AC M AINTENANCE C HECKLIST Filters ___ 1. Check/replace filters ___ 2. Grille area unrestricted ___ 3. Wipe section clean ___ 4. Coil clean Blower Section ___ 1. Blower wheel s free of debri s ___ 2. Check belt tension and co ndition (repl ace if needed) ___ 3. Check/lube bearings ___ 4. Ch eck sheave/pulley[...]

HV AC Maintenance Ch ecklist 123 Condensate Pump ___ 1. Check for debris in sump ___ 2. Check o peration of float(s) (free movement) Refrigeration Piping ___ 1. Check refrigerant line s (clamps secure/no rubb ing/leaks) ___ 2. Check for mo isture (sight glass) W ater-Cooled Condensers ___ 1. Check w ater regulating valve operation ___ 2. Cap tubes [...]

HV AC Maintenance Ch ecklist 124 Air-Cooled Condenser / Drycooler ___ 1. Coil clean ___ 2. Motor mounts tight ___ 3. Bearing s in good condition (motor) ___ 4. Piping support/clamps secure ___ 5. Check wire connections ___ 6. Stat se ttings ___ 7. Refrigerant level (Lee-Temp ) ___ 8. Glyco l level ___ 9. Glyco l solution__ ________________________ [...]

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Ensuring The Hi gh A vai lab ilit y Of Mission-Critic al Dat a And Applic ations. Emerson Net work P ow er , the global leader in enabling business-critical continuity , ensures network resiliency and adaptabilit y through a family of technologies—inc luding Liebert power and cooling technologies—that prot ect and suppor t business-critical sys[...]