Marley / Sigma Steel CoolingTower / Specifications: Options

Specifications

Specification Value

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Basin Heaters:

10.2Add the following paragraph in the Cold Water Basin section: Provide a system of electric immersion heaters and controls for each cell of the tower to prevent freezing of water in the collection basin during periods of shut- down. The system shall consist of one or more stainless steel electric immer- sion heaters installed in the basin. A NEMA 4 enclosure shall house a mag- netic contactor to energize heaters; a transformer to provide 24 volt control circuit power; and a solid state circuit board for temperature and low water cutoff. A control probe shall be located in the basin to monitor water level and temperature. The system shall be capable of maintaining 40°F water tem- perature at an ambient air temperature of __ °F.

Fan Motor Variable Speed Drive:

Marley All Weather ACH550 System

6.4Add the following paragraph in the Mechanical Equipment section when VFD is used with customers Building Management System: A complete UL listed Variable Speed Drive system in a NEMA 1 indoor, 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 out put 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 discon- nect with short circuit protection and external operating handle, lockable in the off position for safety. The VFD system shall receive a speed reference signal from the Building Management System monitoring the tower fluid temperature. As an option to receiving the speed reference signal from a building manage- ment system, the drive must have the capability to receive a 4-20 ma tempera- ture signal from an RTD transmitter. The

VFD shall have an internal PI regulator to modulate fan speed maintaining set point temperature. The drive's panel dis- play shall be able to display the set-point

■The basin heater components described at left represent our recom- mendation for a reliable automatic system for the prevention of basin freezing. They are shipped separately for installation at the job site.

The ambient air temperature that you fill in should be the lowest 1% level of winter temperature prevalent at site.

■Marley VFD drive systems are designed to combine absolute tempera- ture control with ideal energy management. The cooling tower user selects a cold water temperature and the drive system will vary the fan speed to maintain that temperature. Precise temperature control is accomplished with far less stress to the mechanical equipment com- ponents. The improved energy management provides fast payback. Indeed, many utilities offer generous rebates for users having installed VFD drives.

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SPX Cooling Technologies Marley Sigma Steel specifications Basin Heaters
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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.
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