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  1. I have poked around. I have 4 RTU's and each...

    I have poked around.

    I have 4 RTU's and each one has it's own poor ba$t#rd step child problems. 135k sq. ft.

    I am looking for a range form a reputable source I can point to. In other words;...
  2. Duct Static Pressure Ranges; Low, Med, High; looking for source

    Hello and thanks in advance.

    I am looking for a bonafied verifiable soucre to point at for low, medium and high ranges. I found one mfg suggesting up to 2' for low; 3-6" for med; above 6" is...
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    2,822

    Curious... update?

    Wondering how you turned out? This was 4 years ago. I've often tried to motivate guys to get into action regarding a career. You need no motivation ...you have it.

    Building Engineers...
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    1,650

    High side pressure fluctuates

    I suspect I am overcharged.

    The head pressure is fluctuating form 250 to 300. The condensed is slightly dirty, but not bad. The return filter is clean.

    R-22

    Pressures; 55 to 52 and 250...
  5. Problem is not solved; WHO IS; magnehelic...

    Problem is not solved;

    WHO IS; magnehelic shows 0 to 0.8", which calc's out to 650 CFM on an 8" box.

    Getsmart; this could explain why when I put it back together with same parts it Stroked?!? ...
  6. Pneumatic head scratcher; VAV actuator not stroking

    I have a pressure independent Normally Open box. DA stat, velocity control and a 5-10 actuator.

    0 psi from stat (pulled T port), 15# out on B port, but actuator not open?

    I checked everything...
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    1,097

    Fortunately water treatment has been done well in...

    Fortunately water treatment has been done well in the past. We have far more problems with leaks on the evaporators and rotting condensate pans. That's gonna be expensive.
  8. Replies
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    1,097

    Read w/ deep announcer voice; Heavy Metal Dad,...

    Read w/ deep announcer voice; Heavy Metal Dad, you win a trip to our bonus round!!! Thanks
  9. Replies
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    1,097

    No. Not sure what you are calling an economiser...

    No. Not sure what you are calling an economiser coil. The condensers are coiled tube in tube type. If they get scaled, cleaning would be chemical or replacement.

    I was thinking about cperk...
  10. Replies
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    1,097

    No, the book calls for head pressure control...

    No, the book calls for head pressure control valves, but they aren't there? We realize the way to do it would be with modulation valves for head pressure control. Short of that, they believe the...
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    Carrier; 50BJ water condenser flow

    Carrier; 50BJ water condenser flow
    I need a resource to identify the minimum flow rate and the rate at a given pressure differential.

    We have 20, Carrier 50BJ054 package units, one per floor. We...
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    784

    Plenum return

    Above the t-bar grid is return air space (plenum), which returns to the unit/air handler. Perforated grills are placed in each office, or several in an open area. Supply air from the discharge is...
  13. Thank you; very nice tool. I am finding the...

    Thank you; very nice tool.

    I am finding the points in PPCL now with your help. I don't know why I didn't before... I can only guess I was not typing the point name in correctly??

    I don't...
  14. Apogee PPCL/Scheduler; Unable to find point

    Hi,
    I have three garage fans (2 EF 1 SF). The enable point is on, but the start stop is off. I checked the PPCL for the Parking CO prog. but could not find the points. I checked scheduler to see...
  15. I am just thinking out loud here; If I am...

    I am just thinking out loud here;

    If I am pushing more air into the room, than I am pulling out, where is is balance going? Leaks, exfiltration, doors? If the room is tight, then it would seem I...
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    1,132

    yes

    com and 5; com is hot (L1) and 5 goes to the OL on the cmpr
  17. Replies
    4
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    1,132

    yes there is

    All it shows is the black from the board to the cpr. OL (thermal) parrallel to the start and return on com. This is fed from a NO relay, mounted on the board. This rely is open. I jumped the relay...
  18. Replies
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    1,132

    RV Duo-therm; Penguin model by Dometic

    Folks AC went down on RV.

    Two units identical problem on both; Run and cool for about 15 minutes, kick off.

    On arrival found hot compressor, checked thermal OL on compressor and verified...
  19. Replies
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    2,397

    unable to post zip files

    I sent the files home but I probably can't upload them here. I can email them if you like..??
  20. Replies
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    I found the links for Gen II but didn't email...

    I found the links for Gen II but didn't email them home. They're on my computer at work. Gen II has the dials vs. the numbered options.

    I'll try to email them home tomorrow if I don't get...
  21. Replies
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    My comment about the need for humidity control is...

    My comment about the need for humidity control is based on my experience here in So. Cal. Many of our tenants are using strictly comfort cooling machines for their servers. Those with more...
  22. Thread: expansion tank

    by clayb1
    Replies
    9
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    3,687

    Bell & Gossett PRV/Relief combo kit; Typically...

    Bell & Gossett PRV/Relief combo kit;

    Typically the PRV is set to 12 psi, and the relief goes at 30 psi.

    Whether the expansion tank was up on the 34th floor or the 12th, I have seen the same...
  23. Replies
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    2,627

    Leiberts are fine, but do you really need one? ...

    Leiberts are fine, but do you really need one?

    Leiberts are "High Tech" and control humidity. Do you need humidity control, or do you just need cooling. You're running 9,000 btu units? Times...
  24. Thread: NIBCO Actuators

    by clayb1
    Replies
    4
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    603

    Hi, I'm sorry I don't know a NIBCO contact. I...

    Hi,

    I'm sorry I don't know a NIBCO contact. I have been able to use different actuators on other manufacturers valves. I imagine it would make a difference if you're looking for pnuematic or...
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    I've worked on plenty of them and have seen many...

    I've worked on plenty of them and have seen many suffer from poor installation and service techniques. So I guess I'm saying that as you move into these systems, you won't find yourself not...
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