Cooling for NEMA 4X Enclosures

 

NEMA 4X enclosure cooling requires balancing temperature control with the environmental protection required for the enclosure. Depending on the application, cooling options can include heat exchangers, vortex coolers, and air conditioners designed for the enclosure and operating environment.

Understanding NEMA 4X Enclosure Cooling 

When deploying enclosures in an environment with extreme temperatures, thermal management is critical. It is necessary for maintaining the optimum performance of electronics and for keeping a computer system protected from elevated levels of heat.

Because NEMA 4X enclosures are designed to protect against water and other environmental exposures, cooling the equipment inside can present additional challenges.

Because NEMA 4X enclosures are designed to provide environmental protection, adding vents, fans, or other cooling equipment requires careful consideration of how those components affect the enclosure’s protection. Thermal management equipment should be appropriately rated and installed for the enclosure and application.

Can You Put a Fan or Vent in a NEMA 4X Enclosure?

Fans and vents can affect an enclosure’s environmental protection because they create additional openings and pathways for airflow. If ventilation or cooling equipment is added to a NEMA 4X enclosure, the components and installation should be appropriate for the required enclosure rating and operating environment.

3 Common Cooling Methods for NEMA 4X Enclosures

Heat Exchanger

A heat exchanger can be used to transfer heat from the inside of the cabinet to the outside to help keep internal electronic components within appropriate operating temperatures.

When does it make sense? Heat exchangers may be appropriate when the required internal enclosure temperature can remain above the external ambient temperature.

Vortex Cooler

Vortex cooling units produce cool air using clean, dry compressed air.

These units do not have refrigerants or moving parts, so they can be useful in demanding environments.

When does it make sense? A vortex cooler may be considered when compressed air is available and the application requires active enclosure cooling without a conventional refrigeration system.

Air Conditioners

A NEMA 4X-rated air conditioner can be installed in an environment where the electronics inside of the enclosure need to be cooled at or below the ambient external temperature.

When does it make sense? An enclosure air conditioner may be appropriate when the required internal temperature cannot be maintained using methods that depend on ambient temperature alone.

Air conditioners also require routine maintenance to support proper performance. Maintenance requirements should follow the cooling-system manufacturer’s recommendations and the conditions of the operating environment.

How Do NEMA 4X Enclosure Cooling Methods Compare?

Cooling Method	Cooling Below Ambient?	Key Requirement	Typical Consideration
Heat Exchanger	No	Temperature differential	Separates internal and external airflow
Vortex Cooler	Yes	Clean, dry compressed air	No conventional refrigerant system
Air Conditioner	Yes	Electrical power	Active cooling for higher cooling demands

What to Know Before Choosing a Cooling System

Prior to deploying a NEMA 4X computer or printer enclosure, perform research and conduct a thorough examination of the installation environment. 

Compile a list of all electronics which will be installed inside of the enclosure. The list should include the average heat load and operating temperatures. 

Before selecting a cooling method, gather information about:

• Equipment installed inside the enclosure
• Total equipment heat load
• Maximum allowable internal temperature
• Minimum and maximum ambient temperatures
• Humidity and moisture exposure
• Water, dust, chemicals, and other contaminants
• Available electrical power or compressed air
• Required enclosure rating

This information can help determine which thermal management method is appropriate for the enclosure, equipment, and operating environment.

Choosing the Right Cooling Solution for a NEMA 4X Enclosure

The right NEMA 4X enclosure cooling solution depends on the heat generated inside the enclosure, ambient conditions, required internal temperature, environmental exposure, and available utilities. Selecting thermal management alongside the enclosure, not after equipment is already overheating, can help reduce heat-related equipment problems and unplanned downtime.

Need help calculating your enclosure cooling requirements? Complete the Cooling Requirement Worksheet and talk with an ITSENCLOSURES specialist about your application.