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AR-050: Artidor’s new Zone 1 air conditioner

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hes april 18 19AR-050: Artidor’s new Zone 1 air conditioner

“Let’s not waste time on systems with different functionalities, but direct all our attention on an air conditioner that meets the most important market demands.” That was the development assignment that Artidor gave itself. The end result is the explosion-safe AR-050 air conditioner: corrosion resistant, suitable for high ambient temperatures, ATEX zone 1 certified with both cooling and heating modes. (Read More)


With the introduction of the AR-050, Artidor provides an answer to a wide range of demands in the market for explosion-safe products. “Converting air conditioners for use in ATEX zone 2 had already been familiar territory for us for years,” explains director Marc Moolenaar. “After an increasing number of requests from clients for air conditioners and cooling systems for zone 1, we decided to develop and produce them ourselves. To meet another common request, it would have to be a unit that can function at very high ambient temperatures. Last but not least, many customers repeatedly expressed the wish that the unit would have to be able to provide both cooling and heating. We carefully searched the market, but we couldn’t find a system like that. That was reason enough to do it ourselves.

Better discussion partner

With the decision to develop and produce a reliable, high-quality air conditioner completely under its own management, Artidor did not set itself an easy task. “Explosion safety is something we know everything about. We knew a lot less about heating and cooling technology,” admits Marc. “Although I did graduate in power systems engineering in the dim and distant past, I was happy that we were able to make contact with a highly experienced advisor who could walk us through the steps. A lot is involved, but it was more than worthwhile to take on this adventure. Aside from having developed a great product, we also learnt a lot from it. Since then, we have become a better discussion partner for the many installers who buy and use our products.”

Best conceivable product

The fact that the new air conditioner would have to meet the highest demands was fixed from the beginning. “We’re not talking about use in average offices, but in environments where the conditions are highly demanding.
The AR-050 air conditioners are designed with the harsh marine, offshore and coastal conditions of tropical countries in mind: they are corrosion resistant, durable and suitable for ambient temperatures up to 55 °C. By integrating an additional heat exchanger and water pump, the units can be delivered as a water chiller for process cooling purposes. The optional 4-way valve upgrades the air conditioner or water chiller to an actual heat pump, also capable of heating.
The controls of the air conditioner are all housed in a maintenance-free flameproof housing. The unit can be operated by means of the switches and push buttons on the outside of this housing. A 3.8” graphical colour display gives feedback to the operator on the actual temperatures, the status of the system and provides troubleshooting information.

The electrical connections for the power cable and for the temperature reference sensor can easily be made in the stainless steel, increased safe housing. There is no need for special, and often hard to install, Ex d cable glands.

Virtually ‘plug and play’

In countries with a climate like the Netherlands, an air conditioner for use at temperatures up to 48 °C is more than enough. Not so in parts of Asia, the Middle East and some countries around the Mediterranean Sea. “In the desert, it can be extremely hot by day and quite cold at night. A system that cools and heats is not an unnecessary luxury there. The AR-050 air conditioner cools and heats and functions at temperatures up to 55 °C, or even up to 60 °C with some modification.” The unit is easy to install, Moolenaar promises.

The AR-050 is available in capacity levels from 5 kW in steps up to 15 kW. Units can easily be combined and the series can easily be expanded upon request.

The AR-050 air conditioners or water chillers are explosion-safe and meet the IECEx demands and the requirements of European Directive 2014/34/EU (ATEX 114), product category II 2G, group IIB and temperature class T4. The units are CE marked.

About the Author

Marc Moolenaar is director of Artidor Explosion Safety B.V., ATEX enthusiast, member of the Dutch standards committee “Electrical equipment in relation to explosion hazards” and author of the book “Basic knowledge on Explosion safety”.

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