Troubleshooting

Trouble	Cause	Remedy

		If new, see if noise disappears after one week of operation. Drain flush,
Geareducer noise. (If	Geareducer bearings	and refill Geareducer oil. See Geareducer User Manual. If still noisy,
Geareducer noise. (If		replace.
equipped).		replace.

	Gears	Correct tooth engagement. Replace badly worn gears. Replace gears

		with broken or damaged teeth.
		with broken or damaged teeth.

	Loose bolts and cap screws	Tighten all bolts and cap screws on all mechanical equipment and
	Loose bolts and cap screws	supports.
		supports.

		Make sure motor and Geareducer shafts are in proper alignment and
	Unbalanced drive shaft or worn couplings. (If	"match marks" properly matched. Repair or replace worn couplings.
	equipped)	Rebalance drive shaft by adding or removing weights from balancing
		cap screws. See Driveshaft User Manual

		Make certain all blades are as far from center of fan as safety devices
Unusual fan drive vibration	Fan	permit. All blades must be pitched the same. See Fan User Manual.
		Clean off deposit build-up on blades

	Worn Geareducer bearings. (If equipped)	Check fan and pinion shaft endplay. Replace bearings as necessary.

	Worn fan shaft bearings. (Belt drive).	Check fan shaft endplay. Replace bearings as necessary.

	Unbalanced motor	Disconnect load and operate motor. If motor still vibrates, rebalance
	Unbalanced motor	rotor.
		rotor.

	Bent Geareducer shaft. (If equipped).	Check fan and pinion shaft with dial indicator. Replace if necessary.

	Blade rubbing inside of fan cylinder	Adjust cylinder to provide blade tip clearance

Fan noise	Loose bolts in blade clamps	Check and tighten if necessary.

	Fan shaft bearing. (Belt drive).	Grease bearings.

Scale or foreign substance in	Insufficient blowdown	See "Water Treatment" section of this manual.

		Consult competent water treating specialist. See "Water Treatment"
circulating water system	Water treatment deficiency
circulating water system	Water treatment deficiency	section of this manual
		section of this manual

		Check to see if local heat sources are affecting fluid cooler. See if
	Entering wet bulb temperature is above design	surrounding structures are causing recirculation of tower discharge air.
		Discuss remedy with Marley representative.

	Design wet bulb temperature was too low.	May have to increase fluid cooler size. Discuss remedy with Marley
	Design wet bulb temperature was too low.	representative
Cold water temperature too		representative

		May have to increase fluid cooler size. Discuss remedy with Marley
warm.	Actual process load greater than design
warm.	Actual process load greater than design	representative
		representative

See "Tower Operation."	Overpumping	Reduce water flow rate over fluid cooler to design conditions.
See "Tower Operation."
		Check motor current and voltage to be sure of correct contract
		horsepower. Repitch fan blades if necessary. Clean louvers, fill and
	Fluid cooler starved for air	eliminators. Check to see if nearby structures or enclosing walls are
		obstructing normal airflow to fluid cooler. Discuss remedy with Marley
		representative.

	Distribution basins overflowing	Reduce water flow rate over fluid cooler to design conditions. Be sure
	Distribution basins overflowing	distribution water basin nozzles are in place and not plugged.

Excessive drift exiting fluid

cooler

Faulty drift elimination

Check to see that integral fill. Louvers and eliminators are clean, free of debris and installed correctly. If drift eliminators are separate from fill, make sure they are correctly installed and in place. Clean if necessary. Replace damaged or worn out components

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.