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Thread: R290 Care 50
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24-02-2004, 02:53 AM #13
The February edition of the Airah magazine Ecolibrium has a reprint of a paper given at an IIR conference titled Refigeration systems in supermarkets with propane and CO2 - energy consumption and economy.
The following quote is from the safety paragraph:
The propane system is built in a ventilated box, where the concentration under all circumstances is maintained below 25% of the lower explosion limit. The zone inside the box is classified a zone 2 with requirements on minimum IP 54 for the electrical equipment and the equipment has intrinsic safety circuits.Mark Baker
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