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  1. Replies
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    Try this bahco wrench ...

    Try this bahco wrench

    http://www.amazon.com/gp/aw/d/B0012Y2EUC

    It is 8", opens as wide as a 12" and has very narrow jaws and is machined perfectly. It's my favorite adjustable
  2. It seems that you have a big help in that the...

    It seems that you have a big help in that the fault is predictable and repeatable. You should be able to get readings from all over the system up to and at the time of the fault. Count yourself lucky...
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    Knipex are pretty easy to find, in store at sears...

    Knipex are pretty easy to find, in store at sears or at any big online seller, amazon, eBay, etc. The pliers wrench, I think, is the crown jewel of their stuff because there's no equivalent by anyone...
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    That's right

    That's right
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    Oh yeah and I know they are not technically slip...

    Oh yeah and I know they are not technically slip joint pliers, but "water pump" pliers.
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    I really like pipe wrenches the more I use them...

    I really like pipe wrenches the more I use them but they are so dang heavy, even the Al ones (just not a bad), I only grab one when I already know ill need it. Just got a big chain wrench, can't wait...
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    Slip joint pliers as pipe wrench

    I had a 12" pair of NWS (like knipex cobras) pliers to hold a 3/4" copper pipe while I removed a real tight fitting and I couldn't get it to keep the pipe still (they were in the right direction)....
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    I'm always packing a Klein 8" heavy duty needle...

    I'm always packing a Klein 8" heavy duty needle nose pliers and a 6-1.
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    Do the fault times correlate with any major loads...

    Do the fault times correlate with any major loads in the building starting?
  10. Blown control fuse, I mean

    Blown control fuse, I mean
  11. Those mag jumpers are an accident waiting to...

    Those mag jumpers are an accident waiting to happen. You had a worst case scenario, but even if the thing had stuck to cabinet or the c terminal with low voltage on the other end you would have had a...
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    Thanks, that scratched me right where I itched....

    Thanks, that scratched me right where I itched. And thanks DDCDan for your input as well. I was all ready to diagram your explanation out before i saw this article. I need a visual to understand this...
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    Looking at it again, i guess I have another...

    Looking at it again, i guess I have another fundamental question: on any given cycle in a single phase, do the gates work in synch, or is one on and one off at either polarity?
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    VFD electronics explanation

    Ok, so I know this might open a can of worms on electrical/electronics theory but I need to understand this....

    I just took a class on VFDs. I understand how it works but I'm hung up on something....
  15. In my case, the set-point (not even sure if it...

    In my case, the set-point (not even sure if it was adjustable, might have been) wasn't an issue. if i remember correctly, the relay was a NO contact in the control circuit portion of the drive. The...
  16. I know that this particular case has been...

    I know that this particular case has been resolved, but I've also seen a faulty under-voltage relay keep the drive off
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    oops I was using the return water temp. when i...

    oops I was using the return water temp. when i was thinking the head pressure was correct instead of the supply. the supply temp is 75 deg so i guess the head pressure should be 256
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    i would love a wye-strainer and a pressure tap on...

    i would love a wye-strainer and a pressure tap on the shutoff. unfortunately, this is a 30 yr old system with PVC piping and leaky gate valves. at least this one has ball valves (PVC ones). First...
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    results: flushed condenser, cleared some crud...

    results:
    flushed condenser, cleared some crud from it, water split went down a few degrees
    changed hoses, water went down a few more degrees, now the split is 17 deg. 75/92 deg
    pressures went down...
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    there are about 60 similar hp's on the system. no...

    there are about 60 similar hp's on the system. no problems with HP over the summer in any units in occupied suites. The one in question is in a vacant suite. When I originally looked at it for the...
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    Water Source HP condenser flow issues

    I have a new 2 ton mcquay wshp that has an air delta T of 10 deg. and a condenser water delta T of 25 deg:
    return air 72 supply 62
    supply water 75 return 100
    r410a low 130~45 deg high 350~106deg....
  22. Based on that handy picture, they are the static...

    Based on that handy picture, they are the static probes. Thanks
  23. I didn't use probes of any kind, just screwed the...

    I didn't use probes of any kind, just screwed the open brass fittings into the side of the plenum. They have a diagram of this in the instructions, but they recommend the L- shaped spike probes for...
  24. Proper method for using manometer to check static pressure

    I recently purchased a digital differential manometer (fieldpiece). I've used it once to verify airflow on a small (3-5 ton) package unit that had been iced up. I drilled holes into the plenums and...
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