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  1. jordi29

    Branch Circuit Monitoring

    Great answers guys! That's exactly what I was looking for. Perfectly understtod, even for an ME. I only have one question regarding rbulsara's post. You wrote: "For example, for 10A of resistive single phase load (pf=1)between phase A and B and , 10A of load on A and C would add up as 17.32A...
  2. jordi29

    PICCV or Circuit Setters

    Hello all, I have a colleague (old school) at work who insists on the use of PICCV for a computer room air conditioner as basis of design. The Lieberts (our preferred vendor) come with either 2- or 3-way valves internal. We prefer 2-way for our datacenter. Either way, my partner insists in...
  3. jordi29

    Branch Circuit Monitoring

    Wow... lots of replies, but no answer to my question (except for Wareagle... thanks!). Lots of questioning as to "why" I need this. Ok, I can answer that... we are a datacenter, with over 1000 customers.... we bill them per power consumption per individual ckts... got it? Now, my question...
  4. jordi29

    Branch Circuit Monitoring

    Hello all, I am evaluating a Branch Circuit Monitoring (BCM) for my company. Only for a 42-pole panel. We have hundreds of these panels, and no breaker configuration is the same. We have 10A, 20A, 30A, 50A and 100A breakers... 1-pole, 2-pole, and 3-pole... you get the idea. I need to develop...
  5. jordi29

    Calculating gpm from a Pressure Diff reading?

    heppa99, Thanks for your help! The cfm ratings from the manufacturer are 28,000 - 30,000 cfm. Though in-house we usually assume 30,000cfm. I will check to see if I can get my hands on a non-contact flow meter... I think that can come in real handy at various sites we have where we don't have...
  6. jordi29

    Calculating gpm from a Pressure Diff reading?

    Thanks y'all. My ultimate goal is getting the actual tonnage being delivered by this unit. However, I believe there is a formula where, if I have the gpm, I can get the tonnage. Can't remember the formula, it was something like: BTU = (gpm)(500)(dT), where dT is the Delta of the water. Not...
  7. jordi29

    Calculating gpm from a Pressure Diff reading?

    Hello all, First time poster here. I have a CW AHU (55Tons Nominal) and I am trying to figure out how many actual tons of cooling I am currently getting out of it. For this, I need to know the gpm's going through the coil. Since I don't have a flow meter, I believe there is a way to calculate...

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