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I am interested in finding information on the process of removing undesirable shale from concrete aggregate.

swaggy, That would be my thought too. I just wanted to make sure that I was covered if making an additional hazzard by crushing these products. Thanks.

I am looking for MSDS for crushed (recycled) asphalt and crushed concrete. My thought is that we will need them sooner or later.

jOmega, Well, the reason for my confusion was the fact that the drive showed a high temp fault when it failed to start. I really don't know if this is the proper fault for the ambient temp being below 0C. My bad for not stating this in my original post. Would this fact change any thinking...

jOmega, jraef and all, I took jOmega's advice and contacted Rockwell. They said it would not operate 0c or below as jOmega's post and manual states. Had I read and/or retained better..... I have a small heater in the switch panel and problem is solved. Thanks for your time and advice! Best...

Has anyone had experience with this drive in cold weather. The A/B tech support says there is no low temp sensor, however on two occasions, at +5F the drive failed to start showing a high temp fault. After slightly warming the drive I was able to start. I'm thinking there might be a low temp...