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  1. Replies
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    Thanks for the reply. Does anyone have any input...

    Thanks for the reply. Does anyone have any input on how their service support has gone for them?
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    Thoughts on AAON chillers?

    So today my VP of Operations sent me this email:

    "What do you think of AAON chillers for our facility?"

    Along with this link:
    ...
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    We're really struggling with ours. We've got...

    We're really struggling with ours. We've got three of them, but to add insult to injury, two were converted to hybrids by the addition of free cooling coils after they left the factory, by another...
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    Well, the amount of time it took me to respond...

    Well, the amount of time it took me to respond should give you some indication...

    I'm pleased to see that I've got a pretty good crew here to work with. But the facility is a disaster, as...
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    I just started here two weeks ago, but I've heard...

    I just started here two weeks ago, but I've heard nothing but bad things about these, and in fact, I'm already dealing with some of those issues. All of these "made in Mexico" York machines seem to...
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    Well, it's been a couple weeks since I last...

    Well, it's been a couple weeks since I last visited this thread, and I'm happy to see you guys have continued the discussion. I look forward to reading your comments once I can come up for air at...
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    Thanks SO much for posting this link, york56. ...

    Thanks SO much for posting this link, york56. Apparently it's not available to customers on the JCI site.
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    3 years later, but I've got one, along with two...

    3 years later, but I've got one, along with two YVAA's.
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    Now there's an interesting point. I've been all...

    Now there's an interesting point. I've been all caught up in the intensity of the heat...the time component did not occur to me.
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    First, thanks for everyone's comments. This is...

    First, thanks for everyone's comments. This is interesting.

    I'm imagining a 1 kW metal halide bulb in an enclosed, insulated box (maybe the size of a refrigerator). And a 230vac motor that pulls...
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    I agree that the only real way to know is to seal...

    I agree that the only real way to know is to seal the bulb and the motor in separated insulated cases and compare the respective heat gains. The statements about the filament size vs the motor don't...
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    kW equals BTUs...or does it?

    We all know that, working with resistive heating coils, kW has a direct relationship to BTU's. I'm currently working with a company that refers to their chiller load in kW rather than tons, which...
  13. Thanks for the encouragement. I'll be starting...

    Thanks for the encouragement. I'll be starting next Monday (28th). It's pretty scary...all my experience has been in a purpose-built, well-designed data center staffed by some extremely...
  14. I don't have a lot of the information at this...

    I don't have a lot of the information at this stage, being that I'm on the outside. This is a larger colocated data center, with multiple raised floors in different rooms, of varying sizes. In one...
  15. Thanks for your reply, thatguy. That makes...

    Thanks for your reply, thatguy. That makes sense. You make a good point about the latent load, and I should have mentioned that they're running a 45F loop, while I'm running a 55F loop. So I'm not...
  16. Chilled glycol loop pressure differential

    I've been offered a chief engineer position at another data center. One of their priorities upon my acceptance is to get their energy use and efficiency improved. During the interviews, I sniffed...
  17. This is ridiculous. R410a manufacturers have...

    This is ridiculous. R410a manufacturers have been telling us that the only reliable way to get their charges right is to recover and weigh in since they first came out. And nobody is going to do...
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    York ERV shedding polymer?

    We've noticed some weird white flakes on the shelf on the exhaust output side of our ERV's in two AHU's. They look like someone threw a roll of teflon tape in a blender and then dumped it. I'm not...
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