/ Marley MD Cooling Tower / Engineering Data & Specifications
Marley / MD Cooling Tower / Table of Contents Engineering Data Schematic Support Outlet Connection Hoisting Info Freeze Prevention Water Quality 6 22 24 25 26 27 Specifications / Base Base Thermal Performance Performance Warranty Design Loading Construction Mechanical Equipment Fill, Louvers and Drift Eliminators Hot Water Distribution System Casing and Fan Guard Access Collection Basin Warranty 28 28 28 29 29 29 31 31 31 31 32 32 Specifications / Options Stainless Steel Options Stainless Steel Collect
Marley / MD Cooling Tower / ■ Air Movement Package High efficiency fan—wide-chord design for maximum efficiency at low fan tip speeds Eased inlet fan cylinder—ensures full area, low turbulent airflow through the cylinder Spherical roller bearings are rated at an L10 life of 100,000 hours TEFC Fan Motor—1.
Marley / MD Cooling Tower / MD towers are galvanized steel, factory assembled, counterflow cooling towers, designed to serve air conditioning and refrigeration systems as well as light to medium industrial process loads on clean water. The Marley MD evolved from a factory-assembled concept of towers pioneered by Marley some 75 years ago, and incorporate all of the design advancements that our customers have found valuable. MD towers represent the current state of the art in this cooling tower category.
Marley / MD Cooling Tower / Engineering Data : Schematic 6 MD5008 SINGLE CELL Use this data for preliminary layouts only. Obtain current drawing from your Marley sales representative. 2578 The UPDATE web-based selection software —available at spxcooling.com—provides MD model recommendations based on customer's specific design requirements.
Marley / MD Cooling Tower / Engineering Data : Schematic 7 MD5008 SINGLE CELL note 3 Motor kW dBA 1.5m from air inlet face MD5008MAC1L 165 5.5 80 MD5008MLC1L 163 5.5 79 MD5008NAC1L 179 7.5 81 MD5008NLC1L 179 7.5 79 MD5008PAC1L 202 11 81 MD5008PLC1L 202 11 80 MD5008QAC1L 216 15 81 MD5008QLC1L 216 15 80 MD5008MAD1L 180 5.5 80 MD5008MLD1L 177 5.5 79 MD5008NAD1L 197 7.5 81 Model Nominal Tons note 2 MD5008NLD1L 196 7.
Marley / MD Cooling Tower / Engineering Data : Schematic 8 MD5008 MULTICELL Use this data for preliminary layouts only. Obtain current drawing from your Marley sales representative. 2578 CL The UPDATE web-based selection software —available at spxcooling.com—provides MD model recommendations based on customer's specific design requirements.
Marley / MD Cooling Tower / Engineering Data : Schematic 9 MD5008 MULTICELL note 3 Motor kW dBA 1.5m from air inlet face MD5008MAC2L 165 5.5 80 MD5008MLC2L 165 5.5 79 MD5008NAC2L 179 7.5 81 MD5008NLC2L 179 7.5 79 MD5008PAC2L 202 11 81 MD5008PLC2L 202 11 80 MD5008QAC2L 217 15 81 MD5008QLC2L 217 15 80 MD5008MAD2L 180 5.5 80 MD5008MLD2L 180 5.5 79 MD5008NAD2L 196 7.5 81 Model Nominal Tons note 2 MD5008NLD2L 196 7.
Marley / MD Cooling Tower / Engineering Data : Schematic 10 MD5010 SINGLE CELL Use this data for preliminary layouts only. Obtain current drawing from your Marley sales representative. 2578 The UPDATE web-based selection software —available at spxcooling.com—provides MD model recommendations based on customer's specific design requirements.
Marley / MD Cooling Tower / Engineering Data : Schematic 11 MD5010 SINGLE CELL note 3 Motor kW dBA 1.5m from air inlet face MD5010PAC1L 248 11 81 MD5010PLC1L 249 11 80 MD5010QAC1L 269 15 81 MD5010QLC1L 270 15 80 MD5010RAC1L 286 18.5 81 MD5010RLC1L 289 18.5 80 MD5010PAD1L 279 11 81 MD5010PLD1L 280 11 80 MD5010QAD1L 304 15 81 MD5010QLD1L 305 15 80 MD5010RAD1L 325 18.5 81 MD5010RLD1L 329 18.
Marley / MD Cooling Tower / Engineering Data : Schematic 12 MD5010 MULTICELL Use this data for preliminary layouts only. Obtain current drawing from your Marley sales representative. 2578 CL The UPDATE web-based selection software —available at spxcooling.com—provides MD model recommendations based on customer's specific design requirements.
Marley / MD Cooling Tower / Engineering Data : Schematic 13 MD5010 MULTICELL note 3 Motor kW dBA 1.5m from air inlet face MD5010PAC2L 248 11 81 MD5010PLC2L 249 11 80 MD5010QAC2L 269 15 81 MD5010QLC2L 270 15 80 MD5010RAC2L 286 18.5 81 MD5010RLC2L 289 18.5 80 Model Nominal Tons note 2 MD5010PAD2L 279 11 81 MD5010PLD2L 280 11 80 MD5010QAD2L 304 15 81 MD5010QLD2L 305 15 80 MD5010RAD2L 325 18.5 81 MD5010RLD2L 329 18.
Marley / MD Cooling Tower / Engineering Data : Schematic 14 MD5016 SINGLE CELL Use this data for preliminary layouts only. Obtain current drawing from your Marley sales representative. 3607 The UPDATE web-based selection software —available at spxcooling.com—provides MD model recommendations based on customer's specific design requirements.
Marley / MD Cooling Tower / Engineering Data : Schematic 15 MD5016 SINGLE CELL note 3 Motor kW dBA 1.5m from air inlet face MD5016PAC1L 317 11 79 MD5016PLC1L 320 11 78 MD5016QAC1L 345 15 80 Model Nominal Tons note 2 MD5016QLC1L 348 15 79 MD5016RAC1L 369 18.5 80 MD5016RLC1L 372 18.5 79 MD5016SAC1L 390 22 81 MD5016SLC1L 394 22 80 MD5016PAD1L 350 11 79 MD5016PLD1L 353 11 78 MD5016QAD1L 383 15 80 MD5016QLD1L 384 15 79 MD5016RAD1L 410 18.
Marley / MD Cooling Tower / Engineering Data : Schematic 16 MD5016 TWO OR THREE CELL Use this data for preliminary layouts only. Obtain current drawing from your Marley sales representative. 3607 CL The UPDATE web-based selection software —available at spxcooling.com—provides MD model recommendations based on customer's specific design requirements.
Marley / MD Cooling Tower / Engineering Data : Schematic 17 MD5016 TWO OR THREE CELL note 3 Motor kW dBA 1.5m from air inlet face MD5016PAC2L 317 11 79 MD5016PLC2L 320 11 78 MD5016QAC2L 345 15 80 Model Nominal Tons note 2 MD5016QLC2L 348 15 79 MD5016RAC2L 369 18.5 80 MD5016RLC2L 372 18.5 79 MD5016SAC2L 390 22 81 MD5016SLC2L 394 22 80 MD5016PAD2L 350 11 79 MD5016PLD2L 353 11 78 MD5016QAD2L 383 15 80 MD5016QLD2L 384 15 79 MD5016RAD2L 410 18.
Marley / MD Cooling Tower / Engineering Data : Schematic 18 MD5016 FOUR OR MORE CELLS Use this data for preliminary layouts only. Obtain current drawing from your Marley sales representative. 3607 CL The UPDATE web-based selection software —available at spxcooling.com—provides MD model recommendations based on customer's specific design requirements.
Marley / MD Cooling Tower / Engineering Data : Schematic 19 MD5016 FOUR OR MORE CELLS note 3 Motor kW dBA 1.5m from air inlet face 317 11 79 Model Nominal Tons note 2 MD5016PAC4L MD5016PLC4L 320 11 78 MD5016QAC4L 345 15 80 MD5016QLC4L 348 15 79 MD5016RAC4L 369 18.5 80 MD5016RLC4L 372 18.5 79 MD5016SAC4L 390 22 81 MD5016SLC4L 394 22 80 MD5016PAD4L 350 11 79 MD5016PLD4L 353 11 78 MD5016QAD4L 383 15 80 MD5016QLD4L 384 15 79 MD5016RAD4L 410 18.
Marley / MD Cooling Tower / Engineering Data : Schematic 20 MD5016 FOUR CELL QUAD Use this data for preliminary layouts only. Obtain current drawing from your Marley sales representative. The UPDATE web-based selection software —available at spxcooling.com—provides MD model recommendations based on customer's specific design requirements.
Marley / MD Cooling Tower / Engineering Data : Schematic 21 MD5016 FOUR CELL QUAD note 3 Motor kW dBA 1.5m from air inlet face MD5016PAC4B 317 11 79 MD5016PLC4B 320 11 78 MD5016QAC4B 345 15 80 MD5016QLC4B 348 15 79 MD5016RAC4B 369 18.5 80 MD5016RLC4B 372 18.5 79 MD5016SAC4B 390 22 81 Model Nominal Tons note 2 MD5016SLC4B 394 22 80 MD5016PAD4B 350 11 79 MD5016PLD4B 353 11 78 MD5016QAD4B 383 15 80 MD5016QLD4B 384 15 79 MD5016RAD4B 410 18.
Marley / MD Cooling Tower / Engineering Data: Support 22 L OVERALL OF BASIN E D E ANCHORCL BOLT CL ANCHOR BOLT A ANCHOR CL BOLT 21 TOWER COLLECTION BASIN W OVERALL WIDTH OF BASIN HOLES FOR M16 ANCHOR BOLTS 4 REQD 21 SUPPORT BY OTHERS C NORMAL GAUGE TOWER COLLECTION BASIN CL ANCHOR BOLT VIEW A 21 SUPPORTING STEEL SINGLE CELL Dimensions Model Design Operating Weight Design Operating Load at support beam kg/m W L C D E F MD5008__C 2578 2731 2537 2629 51 165 3072 563 MD5008
Marley / MD Cooling Tower / Engineering Data: Support 23 OVERALL LENGTH OF BASIN E D CL ANCHOR BOLT E ANCHOR CL BOLT A ANCHOR CL BOLT 21 F ANCHOR CL CL ANCHOR BOLT BOLT W OVERALL WIDTH OF BASIN HOLES FOR M16 ANCHOR BOLTS 4/CELL CLANCHOR BOLT C TOWER COLLECTION BASIN 21 SUPPORTING STEEL MULTICELL NOTE 1 Use this bulletin for preliminary layouts only. Obtain current drawings from your Marley sales representative for final design.
Marley / MD Cooling Tower / Engineering Data : Outlet Connection MAKEUP MAKEUP 2" NPTM MECHANICAL COUPLING GROOVE ALTERNATE LOCATION SUCTION HOOD WELDING BEVEL C D 24 REMOVABLE TRASH SCREEN A PUMP SUCTION CL TOWER OVERFLOW B 89 3" NPTF 23 DRAIN SUCTION SECTION 3" NPTF SIDE-OUTLET SUCTION CONNECTION Dimensions MAKEUP Model 2" NPTM SLOPING BASIN FLOOR Suction Diameter A B C D 6" 8" 10" 6" 8" 10" 6" 8" 10" 12" — 191 — — 191 — — 191 216 — 493 493 493 477 477 477 477 477 477 477 58
Marley / MD Cooling Tower / Engineering Data : Hoisting 25 OFFSET MAY BE REQUIRED FOR BALANCED LIFT OFFSET MAY BE REQUIRED FOR BALANCED LIFT CENTER OF TOWER CENTER OF TOWER LIFTING SLING LIFTING SLING WIDTH WIDTH 70° MAX BOTH MODULES Base Module Model Top Module Width Sling Length Minimum Weight kg Width Sling Length Minimum Weight kg MD5008 2.6m 3m 1100 2.8m 3m 900 MD5010 2.6m 4m 1350 2.6m 3m 1050 MD5016 3.7m 4m 1650 3.
Marley / MD Cooling Tower / Engineering Data: Freeze Prevention When the ambient air temperature falls below 0°C, the water in a cooling tower can freeze. Marley Technical Report #H-003 “Operating Cooling Towers in Freezing Weather” describes how to prevent freezing during operation. Available at spxcooling.com or ask your Marley sales representative for a copy. During shutdown, water collects in the cold water basin and may freeze solid.
Marley / MD Cooling Tower / Engineering Data: Water Quality The MD cooling tower can be a very effective air washer. Atmospheric dust able to pass through the relatively small louver openings will enter the recirculating water system. Increased concentrations can intensify systems maintenance by clogging screens and strainers— and smaller particulates can coat system heat transfer surfaces.
Marley / MD Cooling Tower / Specifications: Base Specifications 1.0 Base: 1.1 Furnish and install an induced-draft, counterflow-type, factory assembled, film fill, industrial duty, cooling tower. Unit shall consist of _____ cell(s), as shown on plans. The limiting overall dimensions of the tower shall be _____ wide, _____ long, and _____ high. Total operating power of all fans shall not exceed _____ kW, consisting of_____ @ _____ kW motor(s). Tower shall be Marley Model _____________________. 2.
Marley / MD Cooling Tower / Specifications: Base 29 Specification Value Specifications 4.0 Design Loading: 4.1 The tower and its components shall be designed to withstand a wind load of 1.44kPa. The cooling tower shall be designed to withstand shipping and hoisting loads of 2g horizontal or 3g vertical. Guardrails, where specified shall be capable of withstanding a 890N concentrated live load in any direction and shall be designed in accordance with OSHA guidelines. 5.0 Construction: 5.
Marley / MD Cooling Tower / Specifications: Base Specifications shall be driven through a one-piece multi-groove, solid back V-type belt, sheaves (pulleys), and tapered roller bearings. Bearings shall be rated at an L10 life of 100,000 hours, or greater. Both motor and fan sheaves (pulleys) shall be all cast aluminum to prevent premature corrosion. 6.2 6.3 Motor(s) shall be ____ kW maximum, TEFC, variable torque, inverter duty and specially insulated for cooling tower duty.
Marley / MD Cooling Tower / Specifications: Base Specifications 7.0 Fill, Louvers and Drift Eliminators: 7.1 Fill shall be cross-corrugated, counterflow film type, thermoformed from 0.40mm thick PVC. Fill shall be assembled into packs for ease of removal and cleaning. Fill shall be supported on channel sections supported from the tower structure and have a flame spread rating less than 25.
Marley / MD Cooling Tower / Specifications: Base Specifications 10.0 Access: 10.1 A large rectangular access door shall be located in the plenum on the motor side of the tower. 11.0 Cold Water Collection Basin: 11.1 The collection basin shall be heavygauge galvanized steel and shall include the number and type of suction connections required to accommodate the out-flow piping system shown on the plans. Suction connections shall be equipped with debris screens.
Marley / MD Cooling Tower / Specifications: Options Specifications Specification Value Stainless Steel Options Stainless Steel Collection Basin: 11.1 Replace paragraph 11.1 with the following: The collection basin shall be heavy-gauge Series 300 stainless steel. Only low-carbon stainless steel alloys will be accepted in order to minimize the risk of intergranular corrosion in the weld zones.
Marley / MD Cooling Tower / Specifications: Options Specifications Specification Value Convenience and Safety Options Mechanical Access Platform: 10.2 Add the following paragraph in the Access section: There shall be a mechanical access platform at the mechanical access door allowing access to the mechanical system, drift eliminators, distribution system and fill. The platform shall be galvanized steel bar grating, supported by galvanized steel framework attached to the tower.
Marley / MD Cooling Tower / Specifications: Options Specifications Control Options Specification Value Fan Motor Starter Control Panel: 6.4 Add the following paragraph in the Mechanical Equipment section: Each cell of the cooling tower shall be equipped with a UL listed control system in a IP52 or IP56 outdoor enclosure capable of controlling single-speed or two-speed motors as required, and designed specifically for cooling tower applications.
Marley / MD Cooling Tower / Specifications: Options Specifications Specification Value Vibration Limit Switch: 6.5 Add the following paragraph in the Mechanical Equipment section: A single-pole, double-throw vibration limit switch in a NEMA 4 housing shall be installed on the mechanical equipment support for wiring into the fan motor shutdown circuit. The purpose of this switch will be to interrupt power to the motor in the event of excessive vibration.
Marley / MD Cooling Tower / Specifications: Options Specifications of utility voltage to the motor. Automatic bypass with an earth ground condition is not allowed. The bypass contactor shall be cycled on and off while operating in bypass, to maintain the set-point temperature of the cold water. The drive design shall be operated as a stand- alone system without the need for a BMS system.
Marley / MD Cooling Tower / Specifications: Options Specifications Specification Value start and stop control, bypass/VFD selection, Auto/Manual selections, manual speed control. To prevent heating problems in the cooling tower fan motor and to assure proper gear reducer lubrication the VFD system shall de energize the motor once 25% motor speed is reached and cooling is no longer required. The cooling tower manufacturer shall supply VFD start-up assistance.
Marley / MD Cooling Tower / Specifications: Options Specifications Specification Value Sound Control 1.2 Add the following paragraph under Base: The cooling tower shall be quiet operating, and shall produce an overall level of sound no higher than ____ dBA, measured at the critical location indicated on the plans. ■ Sound produced by a standard MD tower operating in an unobstructed environment will meet all but the most restrictive noise limitations—and will react favorably to natural attenuation.
GREGORY'S BANK WORCESTER WR3 8AB UNITED KINGDOM 44 (0) 1905 720 200 info.uk@spx.com spxcooling.com In the interest of technological progress, all products are subject to design and/or material change without notice. ©2008 SPX Cooling Technologies, Inc.
