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

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

Summer is Coming: EXAIR Cabinet Coolers Save Your Electrical Cabinets from Overheating

The pool is open, the garden is tilled, it must mean summer is coming. This year, I’m gearing up for a hot one. My love for spicy food is already well documented here on the EXAIR Blog, and this year it’s going to be the hottest one yet! In the garden for this year we have Purple Ghost Peppers, “regular” Bhut Jolokia (Ghost peppers), White Moruga Scorpion, Purple Ghost Scorpion, Bhutlah Scorpion, and a selection of “milder” peppers and other veggies for when I’d rather not melt my face off while eating. Needless to say, you should proceed with caution when eating salsa at my house. It’s going to be heating up in my kitchen at the same time your electrical cabinets also begin to overheat. Not to worry, EXAIR has the tools you need to keep things cool.

Some of what is in store for this year’s garden, acclimating to the “real’ sunshine in late April

EXAIR’s Cabinet Cooler Systems were designed specifically to rectify these issues within your facility. 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. This year, EXAIR also introduced a new line of Hazardous Location Cabinet Coolers for use in classified areas.

Many of our customers experience seasonal overheating problems with their cabinets. Cabinet Cooler systems are a perfect solution for electrical panels which start to fault out in may or June and continue to cause chaos through September or October. They are quick to install, maintenance free and can be purchased with a thermostat control so they turn off in October and back on in May. You’ll hardly even remember its there and you won’t miss the electrical problems normally associated with a hot summer.

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, or just want to talk about spicy food and gardening, contact an Application Engineer today and we’ll be happy to help. Don’t wait until it’s too late, EXAIR’s Cabinet Cooler is the simple solution for maintaining the temperature inside of your electronic enclosures.

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

HazLoc Cabinet Cooler Systems: Application for Gas Sampling

A company from the Middle East contacted me about cooling a gas sampling device that was placed inside an enclosure.  The Middle East is well-known for Oil and Gas and hot ambient temperatures.  The sampling system was used by a Petroleum company to measure the composition of gas samples.  This type of device had a refrigerant system to keep the sample at a predetermined temperature.  Since the ambient conditions were very high, they noticed incorrect readings with their calibration gas.  They wanted to use an enclosure to protect the instrument from the environment and to use the Vortex technology to cool the surroundings of the gas sampling instrument to help it work properly. 

Like with any A/C unit, the higher ambient temperatures will reduce the cooling capacity of a refrigeration system.  The customer gave some details of what they needed.  They wanted to target an internal temperature at a maximum of 35oC (95oF) which would allow for proper readings.  The enclosure measured 2000 mm X 1200 mm X 1000 mm (79” X 47” X 39”), and it was made from 316SS with insulation inside.  The area was classified as a Class 1 – Div2 which means that there is a potential for an explosive gas to be present.  The sampling machine generated about 170 watts (580 BTU/hr) of heat inside.  The maximum ambient temperature was 50oC, and the instrument grade air that was being used for the Cabinet Cooler was only at 6 bar (87 PSIG).  With all this information, I had a lot to consider to determine the correct cooling capacity.

The first thing that I needed to decide was if they had a purge system on the hazardous panel.  They sent a diagram setup of the panel as shown below.  They did have a Z-purge system as reference as #4 in the diagram.  (This was the correct type of purge system for a Div2 area).  They also showed a check valve on the cold air side to reduce the potential risk for ingress.  With the design of the EXAIR HazLoc Cabinet Coolers, we use a poppet valve to keep any dangerous liquids or gases from entering.  So, they could remove it from their item list which saved them money.    

With the calculation for the total heat load, I recommended the model HZ4840SS-316-240.  When they installed the EXAIR system to their enclosure; they were extremely happy with the compact size and the ease of installation.  Now, when a sample bottle came in for test, they were able to attach it to the gas sampler and allow for the Z-Purge system to evacuate the enclosure.  Once the purge system cycled, the solenoid valve for the Cabinet Cooler as well as the gas sampling system started operating.  With the instant cold from the HazLoc Cabinet Cooler, the gas sampling equipment was able to find the composition of the gas accurately and consistently. 

The EXAIR HazLoc Cabinet Cooler Systems are designed to keep your electrical panels cool within hazardous areas like the Class I – Div 2 above.  The certification is under UL Classified for Class I, Class II, and Class III areas with both Div1 and Div2.  System shutdowns from electrical components overheating or incorrect measurements with gas sample analysis are costly and potentially dangerous.  If you would like to discuss in more details about the different types of EXAIR HazLoc Cabinet Coolers, an Application Engineer at EXAIR will be happy to help you. 

John Ball
Application Engineer
Email: johnball@exair.com
Twitter: @EXAIR_jb