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Marley MH Fluid Cooler
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User Manual 05-116E
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Contents This manual contains vital information for the proper installation Note and operation of your fluid cooler. Carefully read the manual before installation or operation of the fluid cooler and follow all instructions. Save this manual for future reference. Fluid Cooler Location ............................................................................. 5 Fluid Cooler Shipment ............................................................................ 6 Receiving Fluid Cooler .......
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Preparation The Marley MH Fluid Cooler with CoolBoost™, purchased for this instal- lation represents 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, ® Geareducer , couplings, drive shafts, float valves, pumps, etc.—are in- tended to assure that the fluid cooler serves you properly for the maximum possible time.
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Preparation It is not intended nor assumed that access to the fan deck on single-flow Note 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 safety considerations have been addressed. Several options are available that may assist you in addressing some of these personnel safety concerns, including: • Louver face di
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Installation The fluid cooler must be located at such distance and direction to Warning 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 the fluid cooler is in compli- ance with applicable air pollution, fire and clean air codes. Fluid Cooler Shipment Unless otherwise specified, the M
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Installation Hoisting clips are provided for ease of unloading and positioning the Warning fluid 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 hoist them at the same time by utilizing the hoisting clips alone! Fluid Cooler installation These installation instructions are intended to help yo
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Installation Fasteners and components provided by others that are to be attached Note 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 process fluid supply and return piping to the coil. Field piping connection is an NPT male connection at the coil. A welded connec- tion requires removing the threaded portion of the coil. For welded connections protect adjacent areas from excessi
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Installation • 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 requires a starter with a shorting contactor. • Two-winding motor requires a starter with out a shorting contactor. • All two-speed starters must have a 20 second time delay relay when switching from high sp
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Installation equipment. Electrical savings can be large during periods of low ambient temperature when the cooling requirement can be satisfied at reduced speeds. To benefit from these advantages, it is important that the drive be installed correctly. Marley supplies VFD and VFD controls specifically designed for our cooling products. If you have purchased a Marley VFD and/or controls package, please follow the instructions in the User Manual for that system. Most VFD problems can be avoi
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Installation Mechanical Equipment: The fluid cooler is designed to operate at full speed and half speed. Warning Warranty 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 full range of speeds and checked against CTI guidelines for ex- cessive vibration. Speed ranges not meeting these guidelines must be locked out in the
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Installation It is essential that the fan cylinder and fan guard be installed in ac- Note 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 rotation of the fan(s). If rotation is backwards, shut off the fan and reverse two of the three primary leads supplying power to the motor. If tower is equipped with a two-speed motor , check for proper rota- Caution tion at both speeds. C
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Operation Fluid Cooler Start-Up Among other sources, outbreaks of Legionnaires’ Disease have report - Warning edly been traced to cooling towers and fluid coolers. Maintenance and water treatment procedures that prevent amplification and dissemina - tion of Legionella and other airborne bacteria should be formulated and implemented BEFORE systems are operated and continued regularly thereafter to avoid the risk of sickness or death. Water System: 1. New installations should be clea
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Operation 7. While operating the recirculating water pump(s) and prior to operat- ing the cooling tower fan, execute one of the two alternative biocidal treatment programs described in the following: • Resume treatment with the biocide which had been used prior to shutdown. Utilize the services of the water treatment supplier. Maintain the maximum recommended biocide residual (for the specific biocide) for a sufficient period of time (residual and time will vary with the biocide) to bring
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Operation Fluid Cooler Operation general: The cold process fluid temperature 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 temperature will reduce. Heat Load (Btu/hr) Range – °F = GPM x 500 or — in SI units Note that the number of degrees (“range”) through which the fluid Heat Load (
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Operation 4. air flow rate: Reducing air flow through the fluid cooler causes the cold process fluid temperature to rise. This is the recommended method by which to control leaving process fluid temperature. If your fluid cooler is equipped with a single-speed motor, the motor may be shut off when the process fluid temperature becomes too cold. This will cause the process fluid temperature to rise. When the fluid temperature then becomes too warm for your process, the motor can be resta
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Operation Slushy, transitory ice forms routinely in the colder regions of the fill Note 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 the operator's responsibility to prevent the formation of destruc- tive (hard) ice on the fluid cooler fill. Certain guidelines should be followed: 1.
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Operation 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 required to determine the time required to melt accumulated ice. Reverse operation of fans for prolonged periods during subfreezing Warning weather can cause severe damage to fans and fan cylinders.
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Operation Coil Volume Coil Volume Model Model US Gallons US Gallons MHF702__061 65 MHF705__061 235 MHF702__081 85 MHF705__081 315 MHF702__101 105 MHF705__101 390 MHF702__121 125 MHF705__121 465 MHF702__062 75 MHF705__062 285 MHF702__082 100 MHF705__082 380 MHF702__102 120 MHF705__102 470 MHF702__122 150 MHF705__122 565 MHF703__061 85 MHF706__061 390 MHF703__081 115 MHF706__081 500 MHF703__101 140 MHF706__101 610 MHF703__121 170 MHF706__121 725 MHF703__062 100 MHF706__062 475 MHF703__082 130 M
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Operation Water Treatment and Blowdown Maintaining Water Quality: The steel used in MH Fluid Cooler's has been galvanized with a heavy zinc coating averaging 2.0 mils in thickness. Other materials used (PVC fill, drift eliminators, and louvers, aluminum fans, cast iron Geareducer, etc.) are selected to offer maximum service life in a “normal” fluid cooler environment, defined as follows: Recirculating water with a pH between 6.5 and 8; a chloride content (as NaCl) below 500 ppm; a sulfate c
