Warning

Warning

Caution

Warning

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 weather can cause severe damage to fans and fan cylinders. Ice can accumulate inside fan cylinders at fan blade plane of rotation and fan blade tips will eventually strike this ring of ice, damaging the fan blades or cylinder. Ice can also accumulate on fan blades and be thrown off, damaging fan cylinder or blades. Allow a minimum of 10 minute delay between reverse operation and forward operation during subfreezing weather to permit ice to dissipate from fan blades and fan cylinders. See Fan Drive Caution note on page 12 for fan speed change and reversing precautions.

Intermittent Wintertime Operation:

If periods of shutdown (nights, weekends, etc.) occur during freezing weather, measures must be taken to prevent the water in the cold water basin—and all exposed pipework—from freezing. Several methods are used to combat this, including automatic basin heater systems and pump freeze protection systems available from Marley.

Basin heaters systems will not prevent the coil from freezing.

Unless some means of freeze prevention is incorporated into your system, the tower basin and exposed pipework should be drained at the beginning of each wintertime shutdown period.

If tower basin is drained, verify that all basin heaters have been shut off either by automatic cutoff or disconnect switch.

Protection Against Coil Freezing:

Ethylene and propylene glycol solutions are the best means to protect the coil from freezing. The following table provides the coil volume for each MH Fluid Cooler model. MHF706 and MHF707 coil volumes are for both coils added together.

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SPX Cooling Technologies MHF705, MHF702 user manual Intermittent Wintertime Operation, Protection Against Coil Freezing

MHF702, MHF705 specifications

SPX Cooling Technologies has established itself as a leader in innovative cooling solutions, with the MHF705 and MHF702 units being prime examples of their commitment to efficiency and performance. These models are designed specifically for cooling processes in various industrial applications, providing reliable operation while minimizing energy consumption.

The MHF705 and MHF702 units are both equipped with advanced features that enhance their operational efficiency. One of the standout characteristics is their modular design, which allows for easy customization and scalability according to the system requirements. This flexibility makes them suitable for a wide range of applications, from HVAC systems to industrial cooling processes.

In terms of technology, both units utilize SPX’s proprietary air distribution system that optimizes airflow patterns within the unit. This ensures uniform cooling and reduces hot spots, contributing to enhanced overall performance. Additionally, the MHF series incorporates high-efficiency fans designed to reduce energy consumption while maximizing cooling output. These fans not only operate quietly but also have extended lifespans, reducing the need for frequent replacements.

Another significant feature of the MHF705 and MHF702 models is their robust construction. With materials designed to withstand harsh environmental conditions, including corrosion-resistant coatings, these units promise longevity and durability. This resilience is crucial for industries where reliability and minimal downtime are paramount.

The MHF series also excels in terms of maintainability. Features such as easily accessible components and modular serviceability make routine maintenance straightforward, which helps in limiting operational interruptions. Additionally, the units are designed with energy efficiency in mind, complying with various environmental standards, which reflects SPX's commitment to sustainability.

Both models also benefit from advanced control technologies, allowing for seamless integration with existing systems. Users can monitor and adjust settings easily via a user-friendly interface, ensuring optimal performance tailored to specific cooling demands.

In summary, SPX Cooling Technologies’ MHF705 and MHF702 units represent the pinnacle of modern cooling technology. With their advanced features, scalable design, high durability, and energy-efficient operation, these cooling solutions stand out as ideal choices for a diverse range of industrial applications, ensuring that businesses can rely on them for efficient and dependable cooling performance.