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  1. Replies
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    all of us out there screw up its part of learning...

    all of us out there screw up its part of learning curve just relax and keep it simple I was thrown in right out of school and finally realized i was complicating everything , Hang in there and use...
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    395

    no expert either best thing to do is order a...

    no expert either best thing to do is order a manual from thermotron
  3. Replies
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    that is a lot of help Icemeister I appreciate it.

    that is a lot of help Icemeister I appreciate it.
  4. Replies
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    935

    40 deg room to 0 deg

    I have a staging warehouse that is kept at forty using Bohn condensors and Heatcraft evaporators that the production managers want to be lowered to zero. These are R-22 systems with air defrost how...
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    1,464

    Chiller Plant in CPVC

    Hey Guys,
    We need some input on this, has anyone ever worked in a chiller plant that was piped in CPVC . We have an engineer that proposes this in one of our plants. Does any have any Pros and Cons....
  6. Thread: Help

    by hvacplumb
    Replies
    0
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    571

    Help

    Hey Guys
    I need to know what tonnage this is
    American Standard electric air handler-Model EF-490
    Serial # E70G001763
  7. Replies
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    4,846

    I am a union pipefitter and plumber and I have...

    I am a union pipefitter and plumber and I have put together miles of screw pipe and I will always teflon first and then put a little dope on.
  8. Thread: p-traps

    by hvacplumb
    Replies
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    1,671

    we are not talking about sucking water we are...

    we are not talking about sucking water we are talking about moist air.
  9. Thread: p-traps

    by hvacplumb
    Replies
    19
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    1,671

    humidity migration

    yes all evaps are in same space.How much negative pressure would it take to pull moist air into a space not much.
  10. Thread: p-traps

    by hvacplumb
    Replies
    19
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    1,671

    if i have 10 evaporators draining into one main...

    if i have 10 evaporators draining into one main couldn't i be sucking moisture in if one or two of the pans are draining and the trap is on the very end of the line.the installation instructions...
  11. Thread: p-traps

    by hvacplumb
    Replies
    19
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    1,671

    the frost is building up above the units on the...

    the frost is building up above the units on the ceiling and bar joists
  12. Thread: p-traps

    by hvacplumb
    Replies
    19
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    1,671

    p-traps

    speaking of p-traps i maintain a 20,000 sq ft -10 freezer for composite material storage.the contractor installed a p-trap at the very end of the drain with 10 evaporators connected to it.we are...
  13. Replies
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    3,802

    p-traps

    speaking of p-traps i maintain a 20,000 sq ft -10 freezer for composite material storage.the contractor installed a p-trap at the very end of the drain with 10 evaporators connected to it.we are...
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    1,596

    11" wc you are using propane i assume

    11" wc you are using propane i assume
  15. Replies
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    752

    thanks

    how about some help instead of worrying about where it is posted
  16. Replies
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    680

    cooling tower control

    I need to rework the controls on a tower that cools hydraulic oil thru a heat exchanger.I am going to hook up a t-8000 receiver to control the bypass and fan.Does anyone have a typical drawing that...
  17. Replies
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    752

    pneumatic cooling tower control

    I need a control drawing of a bypass valve and fan control.
  18. Thread: rtac140

    by hvacplumb
    Replies
    11
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    2,214

    rtac

    I finally crawled up on top and looked .Condensor fans are tied together at motor instead of contactor. Fan spins backwards and I didnt catch it at first.Will post all info when I get motor...
  19. Thread: rtac140

    by hvacplumb
    Replies
    11
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    2,214

    trane literature

    Graham,
    I appreciate your input.Is there any more service literature on this chiller that I can aquire.
    Merle Wilbur
    Service Tech
    Bell Helicopter
  20. Thread: rtac140

    by hvacplumb
    Replies
    11
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    2,214

    yes it is a high oil temp alarm

    yes it is a high oil temp alarm
  21. Thread: rtac140

    by hvacplumb
    Replies
    11
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    2,214

    I have a rtac that is giving me a oil temp alarm...

    I have a rtac that is giving me a oil temp alarm i have read the diagnostic in the o&m and it sounds like it could be related to the small load that we have on the chiller.
    does anyone have input....
  22. Thread: politics

    by hvacplumb
    Replies
    4
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    798

    -yes hvacpope typing lets people act in ways...

    -yes hvacpope typing lets people act in ways that they probably wouldn't in person.Use the forum for what is intended for.....
  23. Thread: politics

    by hvacplumb
    Replies
    4
    Views
    798

    Hey guys, I have enjoyed this site for several...

    Hey guys,
    I have enjoyed this site for several years and I have gained a lot of information . My concern is about all the political posts. I am a union member but i don't think this is a forum about...
  24. Thread: carrier info

    by hvacplumb
    Replies
    2
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    1,056

    I need wiring diagrams for a 48DA016 Do not have...

    I need wiring diagrams for a 48DA016 Do not have serial #
    I also need IOM manuals.Can anybody Help.
  25. Replies
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    not a scroll and disregard the argument and yes...

    not a scroll and disregard the argument and yes oil pumps are directional but he is saying something about centrifugal weights on the crankshaft or some thing like that.has anybody seen that.
  26. Replies
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    1,288

    A friend of mine says that he installed a...

    A friend of mine says that he installed a hermetic trane compressor that kept tripping an overload.He could not figure out why so he called techinal support and they told him to change the rotation ....
  27. Thread: fuses

    by hvacplumb
    Replies
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    1,180

    what do the abbreviations on fuses stand for

    what do the abbreviations on fuses stand for
  28. Thread: carrier rtu

    by hvacplumb
    Replies
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    3,644

    we had a cool front today went back and checked...

    we had a cool front today went back and checked unit.it is running much better.amps and superheat are good i guess it was just a combo of high load and high ambient.i think it will be okay appreciate...
  29. Thread: carrier rtu

    by hvacplumb
    Replies
    14
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    3,644

    yes replaced contactor as well

    yes replaced contactor as well
  30. Thread: carrier rtu

    by hvacplumb
    Replies
    14
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    3,644

    yes just worried about losing another compressor.

    yes just worried about losing another compressor.
  31. Thread: carrier rtu

    by hvacplumb
    Replies
    14
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    3,644

    yes 67,62,63 on 61fla

    yes 67,62,63 on 61fla
  32. Thread: carrier rtu

    by hvacplumb
    Replies
    14
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    3,644

    i did not check temp rise across condensor

    i did not check temp rise across condensor
  33. Thread: carrier rtu

    by hvacplumb
    Replies
    14
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    3,644

    changed out o6d compressor on a carrier...

    changed out o6d compressor on a carrier mod.48tjdo16.weighed in charge of 19.3#s but was running 70 amps with fla of 61.recovered some refrigerant this is my info.l1-l2-199v,l1-l3 199, l2-l3...
  34. Replies
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    york yt low pressure r-11,sss with opti-view....

    york yt low pressure r-11,sss with opti-view. dont think it is a starter cooling problem due to the fact that i redid on quarterly and i would get a high temp led.

    [Edited by hvacplumb on...
  35. Replies
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    i am going tomorrow to look at this...

    i am going tomorrow to look at this problem.microprocessor is showing this fault every time they do a remote stop sh utdown.motor controller contacts open.which means the solid state starter has seen...
  36. Replies
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    thanks for the reply.what are the parameters of...

    thanks for the reply.what are the parameters of normal discharge superheat and the causes of high and low temps
  37. Replies
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    i know that superheat is heat added to a vapor if...

    i know that superheat is heat added to a vapor if you were checking dis. s.h. would you take dis. pressure convert to temp on chart and then read actual temp of dis. line?
  38. Replies
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    i was instructed by service manager to hook...

    i was instructed by service manager to hook liquid line to liquid opening on recovery tank and recovery tank to vapor and connection pull out of that into another tank would this be same as push pull...
  39. Replies
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    9,492

    to dave

    this forum is not for you to directly vent your racial opinions.post about your vast knowledge on servicing refrigeration equipment not your racial preferences.
  40. Replies
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    useful replies

    this is a great forum when people stick to useful information.opinions about things other than the trade just take up space on forum.
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