SPX Cooling Technologies Marley Sigma Steel specifications Marley Premium VFD System

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Marley / Sigma Steel CoolingTower / Specifications: Options

Specifications

Specification Value

temperature and cold-fluid temperature on two separate lines. The bypass shall include a complete magnetic bypass circuit and with capability to isolate the VFD when in the bypass mode. Transfer to the bypass mode shall be manual in the event of VFD failure. Once the motor is transferred to the by-pass circuit the fan motor will run at constant full speed. The bypass circuit will not modulate ON and OFF based on fluid temperature. The application must be able to handle very cold fluid temperatures while the VFD is in a by-pass mode. Operator controls shall be mounted on the front of the enclosure and shall consist of start and stop control, bypass/VFD selection, Auto/ Manual selections, manual speed control. To prevent heating problems in the fluid cooloer 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 fluid cooler manu- facturer shall supply VFD start-up assis- tance. Tower vibration testing throughout the speed range is required to identify and lockout any natural frequency vibra- tion levels which may exceed CTI guide- lines.

Marley Premium VFD System

6.4Add the following paragraph in the Mechanical Equipment section when VFD is used as a stand alone system: A complete UL listed Variable Speed Drive system in a NEMA 12 indoor

or NEMA 3R outdoor enclosure shall be provided. The VFD shall use PWM technology with IGBT switching and integrated bypass design. VFD output switching shall not cause mechanical issues with gearbox teeth or drive shafts.

The VFD shall catch a fan spinning in the reverse direction without tripping. The panel shall include a main disconnect with short circuit protection and external operating handle, lockable in the off posi- tion for safety. The system shall include a solid state, PI temperature controller to adjust frequency output of the drive in response to the tower fluid tempera- ture. The temperature of the fluid and set point shall be displayed on the door of the control panel. The bypass shall include a complete magnetic bypass

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Contents Marley Sigma Steel Cooling Tower Page Marley / Sigma Steel CoolingTower / Table of Contents Page Marley / Sigma Steel CoolingTower Model Dimensions Maximum AverageTower Motor hpOperating Weight lb Each Cell AddTower Dimensions Operating Weight lb 500-3800 120 101⁄2 13-11⁄4 14-63⁄4 Enclosures Keeping It CleanSound Control Water TreatmentTwo-Speed Motors Variable Speed Fan DriveMarley / Sigma Steel CoolingTower / Specifications Base BaseThermal Performance Construction Fan Deck and Fan Cylinder Mechanical EquipmentMarley / Sigma Steel CoolingTower / Specifications Base Fill, Louvers and Drift Eliminators Hot Water Distribution System AccessCasing Cold Water Collection Basin Scope of WorkControl Options Control SystemBasin Heaters Marley Premium VFD System Vibration Limit Switch Plenum Walkway Convenience and Safety Options StairwayLadder Safety Cage Ladder ExtensionFactory Mutual Approval Oil Level Sight GlassMiscellaneous Options Steel Cold Water Basin Hot Water Basin CoversLow Noise Tower Service Life-Related Customization West 129 Street Overland PARK, Kansas 66213 United States

Marley Sigma Steel specifications

SPX Cooling Technologies is a prominent name in the cooling industry, and the Marley Sigma Steel is one of their flagship products. This cooling tower is designed to provide an efficient, reliable, and sustainable solution for industrial cooling processes. With its advanced engineering and innovative technologies, the Marley Sigma Steel stands out in various applications, from power plants to chemical processing facilities.

One of the main features of the Marley Sigma Steel is its robust construction. Made from high-quality steel, this cooling tower is built to withstand harsh environmental conditions, ensuring durability over time. The galvanized steel construction offers excellent corrosion resistance, which is critical for operations in challenging environments. This longevity helps reduce maintenance costs and downtime, providing a reliable cooling solution for years to come.

The Marley Sigma Steel incorporates a fan-assisted design that enhances airflow across the heat exchange area, improving the overall thermal performance. This design not only increases the efficiency of heat transfer but also minimizes energy consumption, which is essential for companies looking to reduce operational costs. The axial fans utilized in this cooling tower are engineered for quiet operation and enhanced efficiency, making them an ideal choice for urban and noise-sensitive locations.

Another hallmark of the Marley Sigma Steel is its modular design. The cooling tower can be easily configured to meet specific capacity and space requirements, making it a versatile option for a range of applications. This adaptability allows for seamless integration into existing systems, ensuring that whether it's a new build or a retrofit project, the Marley Sigma Steel can meet the needed specifications while optimizing performance.

SPX Cooling Technologies emphasizes sustainability through the Marley Sigma Steel by incorporating environmentally friendly practices in its design. The tower features options for low make-up water use, minimizing resource consumption during operation. Additionally, the innovative water distribution system ensures even water flow across the fill media, enhancing efficiency and reducing water waste.

In summary, the Marley Sigma Steel from SPX Cooling Technologies is a state-of-the-art cooling solution that combines durability, efficiency, and sustainability. Its advanced engineering and design features, such as the robust steel construction, fan-assisted airflow, modular capabilities, and water-saving technologies, make it a frontrunner in the cooling industry, suitable for a wide array of industrial applications. Companies looking for a reliable, efficient cooling system will find the Marley Sigma Steel to be an excellent choice that meets both current demands and future sustainability goals.