Basic Electrical Theory November 8, 2022, 4:33 pm

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Related Tech Tips

Learning from the Past vs. Allowing it to Control You
In our line of work, it's all too easy to let your bad experiences inform your present and future experiences. That is especially true if you have a high emotional range. Having “emotional range” is a polite way of saying that you're a bit up and down (maybe even neurotic). We don’t believe that sensitivity […]
Read more
Which Valve Do I Open First?
Testo 557 vacuum gauge and Appion core removal tools shown I've had a change of heart. Back in the early 2000s, during the big construction boom, I did many system startups on residential units for a large company I worked for. When installers ran the line sets prior to startup, they weren't always very careful […]
Read more
Understanding Relays With the 90-340
Relays can be used for many different control applications, including controlling fans, blowers, other relays, or contactors, valves, dampers, pumps, and much more. A 90-340 is a very common, versatile relay that many techs have on their truck. So, we will use it as an example. A relay is just a remotely controlled switch that […]
Read more
loading

To continue you need to agree to our terms.

The HVAC School site, podcast and daily tech tips
Made possible by Generous support from