Tag Archives: Safety

Natural Gas piping Questions

I recently had a reader ask these questions: How bad is it to use regular galvanized pipe instead of black? How tight should 1/2″ pipe be? I was taught to use sealant dope but to skip the first thread. Should … Continue reading

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I must be doing something right!

Back in April 2011, I started writing on this blog site as a way to help my local contractors and dealers. Most of the posts were based on issues these persons were experiencing and this was a good forum to … Continue reading

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Flood Damaged HVAC Equipment

The South Central, Midwest, and the Northeast have seen record rainfall in the last month and, especially, the last couple of days.  Rivers are over flood stage.  Sewer systems could not keep up with all the rain and sewers backed … Continue reading

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More Info on ECM Motors

The other day, a service tech called and wanted to make sure that he was making a COMPLETE diagnostic of an ECM motor that was not working.  He had checked out the motor with his GE TechMATE Pro and found … Continue reading

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3 Bad Boards in 3 Months?

What do you think the odds are of a new roof top unit going through 3 control boards in just 3 months since the unit was installed? And, if this truly was the case, don’t you think some one would … Continue reading

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Unsung Heroes

I swear that the guy who invented roof top units never lived in a northern climate area in winter or the deep south or southwest  in summer. Since I am a northerner, I especially have a great dislike for the … Continue reading

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How Electricity “REALLY” Works

A sheet of paper crossed my desk the other day and, as I read it, a realization of a basic truth came to me.  So Simple! So obvious we couldn’t see it.  One of our engineers had discovered how power … Continue reading

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Technical Competency

The other day I saw a sign and it really hit home with me. It said, “I CAN EXPLAIN IT TO YOU, BUT I CAN’T UNDERSTAND IT FOR YOU!” In my job, I am on the phone a lot with … Continue reading

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MCA and MOP — What are they and How are they Calculated?

On commercial equipment, there is some information on the data plate  of the unit that has to do with safely wiring and protecting the equipment.  These ratings are the MCA and MOP. To start this discussion, we first need to know what … Continue reading

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