Thanks. Most people use the 1st method as it is quicker and easier and it is the one that is usually taught in schools. I think method 2 is slightly more accurate as it calibrates to the spring. As you can imagine, the spring tension varies as it stretches and contracts, so it may be better to calibrate to that. However with method 2 you need to know the spring range and it may be in the ceiling, under a cover etc. and hard to see. Method 2 could also mess up sequencing if the stat is controlling two different spring range devices like a heating valve and a cooling valve. So it is up to you, but most people just use method 1. Maybe a real expert will read this and have a better answer!
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You are an excellent instructor!
Why would you choose one method of calibration over the other... Excellent video... Thank you
Thanks. Most people use the 1st method as it is quicker and easier and it is the one that is usually taught in schools. I think method 2 is slightly more accurate as it calibrates to the spring. As you can imagine, the spring tension varies as it stretches and contracts, so it may be better to calibrate to that. However with method 2 you need to know the spring range and it may be in the ceiling, under a cover etc. and hard to see. Method 2 could also mess up sequencing if the stat is controlling two different spring range devices like a heating valve and a cooling valve. So it is up to you, but most people just use method 1. Maybe a real expert will read this and have a better answer!