Non Hazardous Purge Cabinet Cooler Systems

Last fall, when our youngest “flew the coop” and moved into a dormitory to begin his college experience, my lovely bride and I also embarked upon an exciting adventure: finding, purchasing, and moving in to our “empty nest” dream house.  While packing up the contents of the house where we had raised a United States Marine AND a hippie college student, I moved my trusty laptop from its perch on a desk in a dark basement corner, where it had resided, in that one spot, for more than a couple years.

As I was looking for its carrying case, I noticed the fan grill was almost completely obscured with more than a couple years’ worth of environmental contamination (or dust).  I vacuumed out the grill, but wondered how much more environmental contamination (dust) had made its way into the deep recesses of the laptop…and more importantly, what might it be doing to the sensitive electronics inside my trusty internet browsing device?

If a computer’s fan in a residential environment can get this dusty, imagine how much worse a control panel on a factory floor can get.

I know I’m not telling you anything you don’t already know, but electronics and dust don’t mix.  We have this conversation a LOT with callers inquiring about our Cabinet Cooler Systems.  The protection they offer against environmental contamination is integral with the protection they offer against heat.  In the panel cooling market, our Cabinet Cooler Systems are unique in that respect: a total protection solution.

When properly installed on a sealed enclosure, the only thing the inside of that enclosure is ever exposed to is cold, clean, moisture free air.  But what if the enclosure can’t be completely sealed?  One option is to use a Continuous Operation Cabinet Cooler System.  It works just as the name implies:  cold air is continuously flowing into the enclosure, creating a constant purge flow…if that cold air is blowing out of any openings in the enclosure, there’s no way for environmental contamination to get in.  Problem solved.

Well…almost.  Something else I’m sure you already know is, compressed air is costly.  Organizations like the Compressed Air & Gas Institute (CAGI) and the Compressed Air Challenge (CAC), who are devoted to optimizing industrial use of compressed air, have lists of “inappropriate uses of compressed air”, and panel cooling is on that list…EXCEPT when they’re thermostatically controlled.  At EXAIR, we couldn’t agree more, and if a caller asks any of us Application Engineers about a Continuous Operation Cabinet Cooler System, they’re inviting us in to a conversation about that.

Sometimes, the initial question is cost…well, we have to pay for the components that make up the Thermostat Controls, so we ask our customers who want those products to as well.   A quick conversation about the operating cost of continuous operation vs thermostat control is usually all that’s required in those cases.

Other times, a panel that can’t be sealed is installed in a particularly dusty or dirty environment, and they want the continuous flow of cold air, as described above, to keep those contaminants out.  A Continuous Operation Cabinet Cooler System will, of course, do that.  But EXAIR wants you to get the most out of your compressed air use, so we developed a “best of both worlds” solution: Non-Hazardous Purge Cabinet Cooler Systems.  Here’s how they work:

  • Based on a few key pieces of data that you can submit in our Cabinet Cooler Systems Sizing Guide, we’ll specify the appropriate Cabinet Cooler System to manage that heat load.
  • The system will be thermostatically controlled: a bimetallic Thermostat, mounted inside the panel, will open and close the Solenoid Valve plumbed in the compressed air supply to operate the Cabinet Cooler as needed to maintain temperature inside the panel.
  • The Solenoid Valve is modified to pass a small amount of air flow (1 SCFM) even when it’s closed.  This saves you from using the full rated air consumption of the Cabinet Cooler when cold air isn’t required, and still maintains enough purge air flow to prevent environmental contaminants from entering a less-than-ideally-sealed enclosure.
Whatever you do, DON’T do THIS to your panel.

The Non-Hazardous Purge option is just one way that EXAIR Corporation can help you address specific environmental challenges that may be presented in electrical and electronic panel cooling applications.  If you’d like to find out more, give me a call.

Russ Bowman, CCASS

Application Engineer
EXAIR Corporation
Visit us on the Web
Follow me on Twitter
Like us on Facebook

Hazardous Location AND Overheating Electronics? We Have You Covered!

Here in Ohio, we like to think we know a lot about the weather. Did you know there are more than 4 seasons? Heck, we have at least two Winters, and then a Pre-Summer, Spring, Summer, Heat is still coming – make it stop season, and Fall. Don’t forget the construction season where the lovely orange cones and barrels bloom on every major roadway, and then we also like to throw in brood weeks for the cicadas every now and then. Yeah, we get a full gambit of weather and the past week has brought out some heat. I know this isn’t just Ohio, we get calls from around the globe of atmospheric conditions that have caused issues within control panels. Some of these panels are in areas where the No Smoking sign is more than just a suggestion to better your health.

1 – Dust Explosion

That’s right, there are areas in manufacturing facilities that are governed by the standard due to a variety of conditions resulting in what is known as Hazardous Locations. NFPA and UL have a list of standards breaking these down into separate Classes, Divisions, and Temperature Classes. If you want all the details, the NFPA code is around 908 pages, cover to cover. The Classified UL mark shown below is one way of knowing that a product has been tested to these stringent standards and is okay to use in clearly marked environments.

UL Classified Markings

EXAIR offers Cabinet Cooler Systems that will meet these stringent standards and keep your enclosures cool in order to keep your production up and running. The top three tiers that we meet are:

  • Class I Div 1, Groups A, B, C and D
  • Class II Div 1, Groups E, F and G
  • Class III

The HazLoc Cabinet Cooler Systems are available in 8 different cooling capacities from 1,000 Btu/hr to 5,600 Btu/hr. and are manufactured to work in conjunction with a purged and pressurized control system. As well as with or without thermostatic control.

EXAIR’s Hazarous Location Cabinet Cooler Systems maintain Type NEMA 4/4X Integrity and are CE Compliant.

If you would like help sizing the correct system for your electrical panels, feel free to use the link, or contact an Application Engineer to discuss the applications and get one sized while on the phone with us.

Brian Farno
Application Engineer
BrianFarno@EXAIR.com
@EXAIR_BF

1 – Dust explosion 05.jpg, Hans-Peter Scholz, October 7, 2009, retrieved from https://commons.wikimedia.org/wiki/File:Dust_explosion_05.jpg

Which to Choose: Cabinet Coolers Vs. Coolant Driven A/C Units

From ancient times humans have sought ways to cool themselves down, from the invention of the manual fan in ancient times to the modern A/C systems that are used to cool down entire buildings. Anymore these days there is a cooling system for just about anything; gaming PC’s have there own cooling system, personal fans that mist water for cooling down people, climate-controlled boxes for artifacts in museums, etc. But what about your electrical cabinets in your facility? Electrical cabinets that overheat can cause expensive shut downs and lead to unsafe operations where the doors are left open with fans blowing in. When it comes to electrical cabinets there are two well-known ways that are used to cool down electrical cabinets which are fans and A/C units. But there is a third option you can go with which is EXAIR’s Cabinet Coolers.

EXAIR’s High Temp Cabinet Coolers

Cabinet Coolers are compressed air powered cooling units that utilize a source of compressed air and vortex tubes to cool down enclosed areas. But why would you choose a Cabinet Cooler over an A/C coolant driven system? Each system has pros and cons that can be weighed against each other.

A/C Coolant Driven Systems:
Pros:
Can produce higher cooling loads effectively

Cons:
Expensive up front
Constant maintenance

Cabinet Coolers:
Pros:

Inexpensive upfront cost, lower lifetime cost
No moving Parts / No actual maintenance

Cons:
Smaller range for effective cooling

Even in extremely aggressive environments, EXAIR Cabinet Cooler Systems provide reliable heat protection for your sensitive electronics and controls.

A/C Units operate in most cases using a chemical known as Dichlorodifluoromethane more commonly referred to as Freon (Freon is a registered trademark of Chemours Co.). By compressing and decompressing the liquid you can cause significant temperature drops in the surrounding air that can be blown into an area. This process requires a lot of moving parts that will eventually wear out and need to be replaced at a cost. Cabinet Coolers don’t have that issue, since they use vortex tubes there are no moving parts to wear out. As long as you provide clean dry air to a Cabinet Cooler the system will run indefinitely. Another thing to keep in mind is that although Dichlorodifluoromethane is a safer version of the older CFC’s , the chemical is not completely safe. Freon can be harmful to the environment as it can breakdown ozone, and due to its its density it will displace oxygen and can cause rapid suffocation.

Cabinet Coolers use compressed air, air which we breath and is all around us. So, no hazards with its energy source.

How the EXAIR Cabinet Cooler System Works

Lastly, although A/C units are cheaper to run they are much more expensive upfront cost and upkeep cost. This means in the long run it is actually cheaper to use a Cabinet Cooler because it does not have any upkeep cost for maintenance and repairs, along with being much cheaper to begin with.

EXAIR’s Cabinet Coolers are currently on promotion – receive a free AC Sensor with the purchase of any Cabinet Cooler.

Take advantage of our promo today!

If you have any questions or want more information on EXAIR’s Cabinet Coolers or like products. Give us a call, we have a team of application engineers ready to answer your questions and recommend a solution for your applications.

Cody Biehle
Application Engineer
EXAIR Corporation
Visit us on the Web
Follow me on Twitter
Like us on Facebook

EXAIR’s Cabinet Coolers: No Maintenance, Simple Installation, Many Years of Trouble Free Operation!

I recently had the pleasure of working with a customer that was looking to expand their production capacity. They were duplicating an existing line due to an increase in demand and needed another Cabinet Cooler. The previous unit, HT4325-24VDC, had been installed over 20 years ago and was still functioning without any issues. This was long before he had started working with the company and they were unable to locate any order history with EXAIR to determine the appropriate model size to order so they quickly uninstalled it to help identify which model they had been relying on all these years.

cabinet cooler
HT4325 Cabinet Cooler – over 20 years old!!!

They installed the cooler and auto-drain filter that comes with the kit. The only maintenance they’ve had to complete for the system is periodically changing the filter element. The Cabinet Cooler has no moving parts to wear out and requires little to no maintenance so long as it is supplied with clean, condensate free compressed air.

Utilizing Vortex Tube technology, the Cabinet Cooler produces cold air from an ordinary supply of compressed air. This cold air keeps the enclosure free of debris and moisture and is easily installed in minutes through a standard electrical knockout. Here is a short video that shows just how simple it really is. The Cabinet Cooler Systems are available with Nema 12 (IP54) ratings and are also available in Aluminum, 303 Stainless Steel, and 316 Stainless Steel construction for Nema 4/4X (IP66) rated enclosures. For systems that are not able to be mounted on top of the cabinet, we also have Side Mount Kits available in Aluminum, 303 Stainless, and 316 Stainless.

These systems are available with cooling capacities of anywhere from 275-5,600 Btu/hr. To make things much easier for you, we offer a Cabinet Cooler Sizing Guide that will allow us to recommend the most suitable model for your cabinet. With a few quick measurements, we’ll be able to determine the exact heat load that we’ll need to dissipate and offer you a quick and easy solution. If you experienced heat related issues on electrical panels last year, contact an Application Engineer today and we’ll see to it that this summer your cabinets remain cool!

Tyler Daniel
Application Engineer
E-mail: TylerDaniel@EXAIR.com
Twitter: @EXAIR_TD