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Manual de instrucciones SPX Cooling Technologies MHF705

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Summary
  • SPX Cooling Technologies MHF705 - page 1

    / Mar le y MH Fluid Cooler / User Manual sea_05-1 16E ...

  • SPX Cooling Technologies MHF705 - page 2

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    3 Contents Fluid Cooler Location ............................................................................. 5 Fluid Cooler Shipment ............................................................................ 6 Receiving Fluid Cooler ........................................................................... 6 Hoisting Fluid Cooler ............. ...

  • SPX Cooling Technologies MHF705 - page 4

    4 Preparation The Marley MH Fluid Cooler with CoolBoost™, purchased for this instal- lation repr esents the current state of the art in crossflow , induced draft fluid cooler design. Thermally and operationally , it is the most efficient fluid cooler of its class. These instructions—as well as those offered separately on motors, fans, Geare ...

  • SPX Cooling Technologies MHF705 - page 5

    5 Preparation It is not intended nor assumed that access to the fan deck on single-ow models—Models MHF702 thru MHF705—is needed or necessary . Those are only some of the safety issues that may arise in the design process. SPX strongly recommends that you consult a safety engineer to be sure that all ...

  • SPX Cooling Technologies MHF705 - page 6

    6 The fluid cooler must be located at such distance and direction to avoid the possibility of contaminated fluid cooler discharge air be - ingdrawn intobuilding freshair intakeducts.The purchasershould obtain the services of a Licensed Professional Engineer or Registered Architect to certify that the location of t ...

  • SPX Cooling Technologies MHF705 - page 7

    7 Hoisting clips are provided for ease of unloading and positioning the uid cooler . For overheadlifts or whereadditional safety is required, safety slings should also be placed under the fluid cooler modules. Under no circumstances should you combine the top and bottom modules of modular models and attempt to h ...

  • SPX Cooling Technologies MHF705 - page 8

    8 Fasteners and components provided by others that are to be attached to the tower must be compatible with the cooling tower materials— i.e. fasteners in a stainless steel cold water basin must be stainless steel. 6. Attach pr ocess fluid supply and return piping to the coil. Field piping connection is an NPT male connection at the coil. A welde ...

  • SPX Cooling Technologies MHF705 - page 9

    9 • Do not start the motor more than six times per hour . Short cycling the tower will cause fuses, breakers or O.L.s to operate and will decrease motor life. When using a two-speed starter: • Motor rotation must be the same at slow speed and high speed. • Single winding motor requir es a starter with a shorting contactor . • T wo-winding m ...

  • SPX Cooling Technologies MHF705 - page 10

    10 equipment. Electrical savings can be large during periods of low ambient temperature when the cooling requirement can be satisfied at reduced speeds. T o benefit from these advantages, it is important that the drive be installed correctly . Marley supplies VFD and VFD contr ols specically designed for our cooling products. If you have pur c ...

  • SPX Cooling Technologies MHF705 - page 11

    11 Mechanical Equipment: The fluid cooler is designed to operate at full speed and half speed. W arranty is void if the tower is operated at speeds which cause damagingvibrationstothe towerandassociatedequipment. When utilizinga variablefrequency drive,the towermust betestedacross thef ...

  • SPX Cooling Technologies MHF705 - page 12

    12 It is essential that the fan cylinder and fan guard be installed in ac - cordance with the drawings shipped with the tower . Do not force the fan cylinder out of round. 4. Momentarily bump (energize) the motor(s) and observe r otation of the fan(s). If rotation is backwards, shut off the fan and reverse two of the three primary leads supplying p ...

  • SPX Cooling Technologies MHF705 - page 13

    13 Fluid Cooler Start-Up Among other sources, outbreaks of Legionnaires’ Disease have report - edly been traced to cooling towers and fluid coolers. Maintenan ce and water treatment procedures that prevent amplification and dissemina - tion of Legionella and other airborne bacteria should be formulated and implemented BE ...

  • SPX Cooling Technologies MHF705 - page 14

    14 7. While operating the recir culating water pump(s) and prior to operat- ing the cooling tower fan, execute one of the two alter native biocidal treatment pr ograms described in the following: • Resume tr eatment with the biocide which had been used prior to shutdown. Utilize the services of the water treatment supplier . Maintain the maximum ...

  • SPX Cooling Technologies MHF705 - page 15

    15 Fluid Cooler Operation General: The cold process fluid temperatur e obtained from an operating fluid cooler will vary with the following influences: 1. Heat load: With the fan in full operation, if the heat load increases, the cold process fluid temperature will rise. If the heat load reduces, the cold process fluid temperatur e will reduce ...

  • SPX Cooling Technologies MHF705 - page 16

    16 4. Air flow rate: Reducing air flow thr ough th e fluid co oler causes the col d process fluid temperature to rise. This is the recommended method by which to control leaving pr ocess fluid temperature. If your fluid cooler is equipped with a single-speed motor , the motor may be shut of f when the process fluid temperature becomes too co ...

  • SPX Cooling Technologies MHF705 - page 17

    17 Slushy , transitor y ice forms routinely in the colder regions of the fill of low temperature towers, and is visible through the tower louvers. Such ice normally has no adverse effect on fluid cooler operation, but its appearance should be a signal to the operator to undertake ice control procedures. It is t ...

  • SPX Cooling Technologies MHF705 - page 18

    18 Reversal may be at either full or half speed; however , reversal at half speed is recommended. Reverse operation of the fan should be used sparingly and should only be used to control ice, not to prevent it. Reverse fan operation should not need to exceed 1 or 2 minutes. Monitor - ing is requir ed to determine the time required to melt accumulat ...

  • SPX Cooling Technologies MHF705 - page 19

    19 When the use of industrial antifreeze solutions is not possible, the system must be operated to meet both of the following conditions. 1. Maintain sufficient flow rate through the coil. 2. Maintain sufficient heat load on the process fluid. Fluid exiting the coil must be maintained at or above 7°C. Cycling of the recir culation pump should ...

  • SPX Cooling Technologies MHF705 - page 20

    20 W ater T reatment and Blowdown Maintaining W ater Quality: The steel used in MH Fluid Cooler's has been galvanized with a heavy zinc coating averaging .051mm in thickness. Other materials used (PVC fill, drift eliminators, and louvers, aluminum fans, cast iron Geareducer , etc.) are selected to of fer maximum service life in a “normal” ...

  • SPX Cooling Technologies MHF705 - page 21

    21 Fluid Cooler Cleaning: Any evaporative-type uid cooler must be thoroughly cleaned on a regular basis to minimize the growth of bacteria, including Legionella Pneumophila, to avoid the risk of sickness or death. Service personnel must wear proper personal protective ...

  • SPX Cooling Technologies MHF705 - page 22

    22 (percent of flow) required to maintain differ ent concentrations with various cooling ranges*: * Range = Differ ence between hot water temperature and cold water temperature. EXAMPLE: 44.2 L/s circulating rate, 10°C cooling range. T o maintain 4 concentrations, the required blowdown is 0.467% or .00467 times 44.2 L/s, which is 0.2 L/s. If flu ...

  • SPX Cooling Technologies MHF705 - page 23

    23 Maintenance See Figure 3 for MH Fluid Cooler models MHF706 and MHF707.The belts are adjusted by turning the threaded rod. Before tightening or loosening the belt, the double nuts holding the motor support in place must be loosened. There ar e two jam nuts at the end of the rod next to the casing. T ur n the nut closest to the end of the rod to t ...

  • SPX Cooling Technologies MHF705 - page 24

    24 Maintenance sion is the lowest tension at which the belt will not slip under peak load conditions. Check tension frequently during the first 24-48 hours of run-in operation. Overtensioning shortens belt and bearing life. Keep belts free from foreign material which may cause slipping. Never apply belt dress- ing as this will damage the belt and ...

  • SPX Cooling Technologies MHF705 - page 25

    25 Fluid Cooler Maintenance Some maintenance procedur es may require maintenance personnel to enter the fluid cooler . Each cased face of the fluid cooler has a door for access to the interior of the tower . The optional fan deck ladder—models MHF706 and MHF707— is de- signed and intended solely for personnel to gain access to the fan deck. T ...

  • SPX Cooling Technologies MHF705 - page 26

    26 W eekly: Inspect for bacterial growth and general operation conditions. Bacterial growth should be reported to your water treatment expert for immediate attention. Monthly (W eekly at start up): Observe, touch, and listen to the fluid cooler . Become accustomed to its normal appearance, sound, and level of vibration. Abnormal aspects relating t ...

  • SPX Cooling Technologies MHF705 - page 27

    27 Clean and disinfect cooling tower with biocides. Systems with biofouling, high general bacterial counts, or positive cultures of legionella may requir e additional cleaning. Refer to “Fluid Cooler Cleaning” section—page 21. Consult your water treatment expert as to prudent biological evaluation testing. Geareducer models used on? ...

  • SPX Cooling Technologies MHF705 - page 28

    28 wire. 3. Insert gr ease fittings in grease fill openings and add gr ease until gr ease is forced out thr ough relief openings. 4. Replace fill plugs and operate mechanical equipment 30 minutes to one hour to pur ge excess grease at grease r elief opening. 5. Reinstall grease r elief plugs and reinstall guard. 6. Resume normal fluid cooler op ...

  • SPX Cooling Technologies MHF705 - page 29

    29 Maintenance bright metal can be exposed by cleaning, consider that the galvanizing has remained effective. Unless there is evidence of a generalized failure of the galvanizing, localized touch-up should be all that is requir ed. T othe extentthat thegalvanizing (zinccoating) stillexists, paintwill not adhere t ...

  • SPX Cooling Technologies MHF705 - page 30

    30 repr esentative for additional information. SPX Cooling T echnologies Services Our interest in your MH Fluid Cooler does not end with the sale. Having conceived, designed, and manufactured the most reliable and longest- lasting fluid cooler of its class, we want to make sure that you gain the maximum possible benefit from its pur chase. Theref ...

  • SPX Cooling Technologies MHF705 - page 31

    31 Maintenance Schedule Maintenance Service Monthly Semi-annually Seasonal Startup or Annually Inspect General Condition and Operation x x Observe Operation of: Mechanical–motor , fan and drive mechanism x x Makeup valve (if equipped) x x Inspect for unusual noise or vibration x x Inspect and Clean: Air inlet x x PVC drift eliminators x x Distrib ...

  • SPX Cooling Technologies MHF705 - page 32

    32 T roubleshooting T rouble Cause Remedy Motor will not start Power not available at motor terminals Check power at starter . Correct any bad connections between the control apparatus and the motor . Check starter contacts and control cir cuit. Reset overloads, close contacts, reset tripped switches or r eplace failed control switches. If power is ...

  • SPX Cooling Technologies MHF705 - page 33

    33 T roubleshooting T rouble Cause Remedy Geareducer noise. (If equipped). Geareducer bearings If new , see if noise disappears after one week of operation. Drain flush, and refill Gear educer oil. See Geareducer User Manual. If still noisy , replace. Gears Correct tooth engagement. Replace badly worn gears. Replace gears with broken or damaged t ...

  • SPX Cooling Technologies MHF705 - page 34

    34 Additional Information the norm. This service is not intended to replace the important function performed by your maintenance staff. Their attention assures the fluid coolers’ s routine operating performance, and is invaluable. However , we recognize that the unusual manner in which a fluid cooler performs its function—as well as the uniqu ...

  • SPX Cooling Technologies MHF705 - page 35

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  • SPX Cooling Technologies MHF705 - page 36

    sea_M05-116E U NIT 505, B L O CK B, P HI LEO DAMANSARA 2 | NO. 15 JALAN 16/11, OF F JALAN D AMAN SARA | 46350 PET ALIN G JA Y A, MALASIA | 60 3 7 665 1018 | spxcooling.com In the interest of technological progress, all products are subject to design and/or material c hange without notice. ©2008 S PX Cooling T echnologies SPX CO OLI NG TEC H NOL OG ...

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