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-speedstarter:

 

• 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 speed to low speed.

 

•

Do not start the motor more than six times per hour (each low

 

 

speed start and each high speed start count as one start).

 

When using a VFD:

 

Before beginning, ensure that the motor is rated for “Inverter Duty”

Note

per NEMA MG-1, part 31.

 

 

•

Set the VFD solid state overload protection to 119% of motor

 

 

nameplate amps and set “maximum current parameter” in the

 

 

VFD to motor nameplate amps. “Maximum current parameter” will

 

 

reduce fan speed and limit amp draw to nameplate amps during

 

 

cold weather operation. If furnished with a mechanical O.L. set this

 

 

at 110% over motor nameplate amps.

 

• Motor rotation must be the same in both VFD mode and By-pass

 

 

mode.

 

• If cable distance between the VFD and motor is greater than 100

 

 

feet a DV/DT output filter is recommended to avoid damage to the

 

 

motor. 100 feet distance is based on our field experience, the VFD

manufacture may state different distances and distance does vary depending on the VFD manufacture.

• Program the VFD for variable torque output. Flux vector and con- stant torque modes may damage the gearbox.

• Do not start and stop the motor using the safety switch at the motor. If the drive is being commanded to run and the load side is cycled ON and OFF with the safety switch this may damage the VFD.

Using a VFD in cooling applications has advantages over traditional single or two speed motor control. A VFD can reduce the cost of electrical en- ergy being used and provide better temperature control. In addition, it reduces the mechanical and electrical stress on the motor and mechanical

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SPX Cooling Technologies Marley MH Fluid Cooler user manual When using a two-speedstarter, When using a VFD
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Marley MH Fluid Cooler specifications

The SPX Cooling Technologies Marley MH Fluid Cooler is a leading-edge solution designed to efficiently manage heat in various industrial applications. Renowned for its performance and reliability, the Marley MH series has become a preferred choice among engineers and facility managers seeking to optimize their cooling processes.

One of the standout features of the Marley MH Fluid Cooler is its innovative design, which emphasizes both energy efficiency and minimal water usage. This closed-circuit cooler employs a unique counterflow design that ensures optimal heat exchange. By allowing the fluid to flow in the opposite direction to the air movement, this system maximizes cooling capacity while minimizing the environmental footprint.

The Marley MH Fluid Cooler is equipped with advanced technologies that enhance its operational efficiency. Its high-efficiency fans are designed for low power consumption, providing significant energy savings over traditional cooling solutions. Additionally, the cooler is constructed with corrosion-resistant materials, ensuring longevity and reducing maintenance costs. The robust design also allows for seamless operation in varying environmental conditions, making it suitable for a wide range of applications, including power generation, manufacturing, and chemical processing.

Another key characteristic of the Marley MH Fluid Cooler is its modular construction, which facilitates ease of installation and adaptability to different setup configurations. This scalability makes it a versatile choice for projects of varying sizes. The unit can be custom-engineered to meet specific cooling requirements, ensuring that users get the precise performance needed for their operations.

Moreover, the Marley MH Fluid Cooler includes a user-friendly control interface that allows for easy monitoring and adjustment of operational parameters. This feature not only enhances user experience but also helps in optimizing performance by enabling real-time performance tracking and adjustments based on system demand.

In summary, the SPX Cooling Technologies Marley MH Fluid Cooler represents a perfect blend of efficiency, durability, and flexibility. With its advanced design, energy-efficient operation, and user-friendly controls, it stands out as a top-tier choice for any industrial cooling application in today's competitive market. Whether for large-scale industrial plants or smaller setups, the Marley MH series is engineered to deliver reliable performance while helping to maintain environmental sustainability.
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