How to adjust EL’s for fittings ACCA Manual D

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ACCA Manual D advanced topics. A rough non-edited version of a specific topic that some might find interesting. If you're looking for polished content give me a few months and you can view it on the ACCA website. This is a quick answer to a question from a contractor that is doing all he can to learn how to do things the right way, like using math. Good on those of you that are following that path.

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28 июл 2024

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Комментарии : 9

@mattkaramccarthy677 Год назад

I simply took the equation provided in Manual D and put it into a spreadsheet. Enter in the values and it automatically adjusts the EL value. Very handy to have. Especially if you end up with a friction rate value that isn't 0.08 inches wc or want to size based on a lower velocity than 900/700...or both! You can play around with different values to bring down large values and "dial in" a duct system.

@Elisummit845 2 года назад

We finally get to see you again 🤠. Been to long since your last video 🤣

@jyphc1679 8 месяцев назад

What is the equivalent length for a round pipe attached directly to a plenum in a return air system with a referenced velocity of 700 pm at 0.08 IWC per 100 feet? How to calculate, can someone explain thank you

@edwardjanowiak 7 месяцев назад

Use the chart on page 108, figure A3-2 along with the EL from group 2 page N20 find your answer.

@SubZero-st3ct 7 месяцев назад

Hi Ed! I have a question about EL! Imagine that! Anyways, out in the field I am running a supply trunk & tapping off with saddle taps/dampers straight to the supply registers. In the Wrightsoft program that I am using it seems to give me multiple options but all with different EL. Option (A) Tee, no transition (B) Branch EL of round take-off (C) Trunk EL of round take-off. WHICH ONE DO I CHOOSE?! Thank you in Advance!

@edwardjanowiak 7 месяцев назад

Group 2 page N22 in Manual D has your answer. The EL is relative to where the tap is with reference to how any branches are downstream to a trunk reducer or end cap. fitting NP is what I would use.