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ENCLOSURES & SAFETY SOLUTIONS SUPPLEMENT


enclosure climate control system, is to observe the cooling unit’s control behaviour. Unlike speed-controlled cooling devices, such as the new Rittal ‘Blue e+’ cooling units, conventional enclosure cooling units begin with the two-point regulation of the cooling operation (when a temperature inside the enclosure gets above of 35°C) and finishes when the shutdown temperature of 30°C is achieved (at a typical hysteresis of 5K). If a cooling device does not reach the shutdown temperature, a conventional cooling unit will therefore continue to operate. If this happens, it is a good indication that the cooling unit


has an insufficient output and suggest that there is likely to be a deficiency in suitable cooling air to the components inside the enclosure. You can simply touch a device to determine a refrigerator’s operating status. The activity of the refrigeration compressor during cold production is accompanied by a slight vibration of the refrigerator housing, which can easily be felt. Alternatively, the exhaust temperature of the cooling unit in the external air circuit may be measured. During active cooling operation, this will be significantly higher (potentially, anywhere between 10°C and 40°C) than


the ambient temperature.


LOCATING HOTSPOTS You can also do a rough check of an enclosure’s climate control system with infrared thermography, which measures the surface temperature of the components inside the enclosure and records the data with an infrared camera. If any areas have significantly elevated temperatures (hot spots), it is an indication that they are not being supplied with enough cooling air.


Rittal www.rittal.co.uk


IT INFRASTRUCTURE


SOFTWARE & SERVICES www.rittal.co.uk


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