Search:

Type: Posts; User: IGBTech

Search: Search took 0.00 seconds.

  1. Replies
    24
    Views
    2,878

    jimmyd5, I have recently worked on a YCAS130...

    jimmyd5,
    I have recently worked on a YCAS130 with similar issues (low amp/MP/HP fault). Is this the same fault you are getting? You said your equipment will run and then go to 0 amps. How long did...
  2. Replies
    24
    Views
    2,878

    Still no link to York literature. Your killing me...

    Still no link to York literature. Your killing me smalls! Maybe they are trying to sell more classes on limited information? :rolleyes:
  3. Thread: Peh 126

    by IGBTech
    Replies
    5
    Views
    813

    Randy S --unfortunatly I'm getting this...

    Randy S --unfortunatly I'm getting this information 2nd hand through a senior tech that took a class on microtech some years back. He told me that they received a list of readings and then was told...
  4. Thread: Peh 126

    by IGBTech
    Replies
    5
    Views
    813

    Peh 126

    I was told to ignore the subcooling/suction superheat readings on the micro-tech controller for this McQuay chiller. This was supposed to come from the McQuay techs themselves. Is this true? Were...
  5. Replies
    37
    Views
    4,866

    PWM Filters

    It seems to me that alot of newer drives are competing on being the smallest and most affordable. Could it be possible that drive manufacturers are skimping on the quality/quantity of their output...
  6. Replies
    2
    Views
    548

    Thanks for the info! I'll pass it on.

    Thanks for the info! I'll pass it on.
  7. Replies
    2
    Views
    548

    Molecular Sieve?

    Just a quick question on what kind of material Trane uses inside their canisters downsteam of the pumpout. Is it really just activated carbon? Also, do you guys send it out when it becomes saturated?...
  8. Replies
    16
    Views
    2,676

    Well everyone, after a very comfotable fall...

    Well everyone, after a very comfotable fall (temperature wise ), we got our mits on this screw. Low and behold, the brass fitting was cracked on the MPT end.
    Frank, I haven't called Steve yet....
  9. Replies
    11
    Views
    3,113

    Could possibly have iced or fosted coil. Bad fan...

    Could possibly have iced or fosted coil. Bad fan motor, not enough defrosts? Maybe a flooding TXV ( short suction line can amplify this ). Check superheat at coil and compressor. Old school techs say...
  10. Thread: Tube Cleaning

    by IGBTech
    Replies
    19
    Views
    2,106

    How long does it take when using citric acid?...

    How long does it take when using citric acid? I've heard different stories. Also is it very expensive compared to the alternatives?
  11. Thread: Abb Vfd Wtf!!

    by IGBTech
    Replies
    21
    Views
    6,984

    What were the E-3's doing? Did you get specific...

    What were the E-3's doing? Did you get specific faults or were they random? How are they controlled? Having a control circuit that is earth grounded is not good on the Toshibas. I'm not really...
  12. Replies
    39
    Views
    5,770

    Thanks for the replies! Absrbrtek-thanks for the...

    Thanks for the replies!
    Absrbrtek-thanks for the link, good article. Supid question-why both ends? Shouldn't just grounding the rotor (regaurdless of where) be enough to discharge the voltage?...
  13. Replies
    39
    Views
    5,770

    Bearing failure due to VFD

    We have been experiencing some bearing failures on various chillers that we have retrofitted with VFDs. I have been told that it is due to charging of the rotor. My question is why doesn't it happen...
  14. Replies
    30
    Views
    2,262

    How big are the filter dryers? Could it be...

    How big are the filter dryers? Could it be possible they are plugging up with sludge from excessive discharge temps (bad condenser fan motors or plugged condenser coils). Just rambling.:o
  15. I have seen a t-stat placed in the evap coil to...

    I have seen a t-stat placed in the evap coil to initiate off cycle defrost when the evap approaches freezing (keeping the fan on of course). I have also witnessed a version of hot gas bypass if the...
  16. Replies
    19
    Views
    2,521

    Man freonguy, if you were wrong all day you were...

    Man freonguy, if you were wrong all day you were right with that post!
    Those three A.M. calls did suck ,contrltech. How about the late night cleaning of anything from dairy cases to plugged up meat...
  17. Replies
    11
    Views
    1,311

    WE have three PEH100's with the tee assembly but...

    WE have three PEH100's with the tee assembly but the capped tube is more like 12" long. I was just wondering what they were for, thanks for the explanation. They look factory installed or "clean"...
  18. Replies
    12
    Views
    1,096

    how big is the box? If it's marginally sized it...

    how big is the box? If it's marginally sized it will definitly take longer to pull down, right?
  19. Replies
    18
    Views
    1,947

    Sorry if I came off as disagreeing on hot gas...

    Sorry if I came off as disagreeing on hot gas bypass that is definitly not the case. I was just wondering if you had come across major problems with the EPR set up?
  20. Replies
    18
    Views
    1,947

    Could it be possible they are emtying the product...

    Could it be possible they are emtying the product to facilitate cleaning?
  21. Replies
    18
    Views
    1,947

    Have you ever used EPRs w/ a suction stop defrost?

    Have you ever used EPRs w/ a suction stop defrost?
  22. Replies
    41
    Views
    3,556

    oops:o had that backwards didn't I. Based on the...

    oops:o had that backwards didn't I. Based on the fact that the only difference between 507 and 404A is 4% 134A I deduced that when 404A leaked out the first one to go would be the 134A essencially...
  23. Replies
    41
    Views
    3,556

    I have retrofitted systems with 507 with great...

    I have retrofitted systems with 507 with great results. Sometimes you actually increase capacity (slightly) utilizing 507 rather than 502 (due to existing suction line sizes). Besides, if the system...
  24. Replies
    56
    Views
    6,306

    What effects would you see if the tech had been...

    What effects would you see if the tech had been charging vapor out of his 404A cylinder and this job finished off the drum? I mean, I see the noncondensibles, but if this guy did get all the air (or...
  25. Replies
    79
    Views
    7,921

    Sounds like they didn't have the accel deccel...

    Sounds like they didn't have the accel deccel times set right. Utilizing a VFD for soft start still aids in energy efficiency and its easier on the motor (rather than accross the line), right?...
  26. Thread: Cvhe080

    by IGBTech
    Replies
    18
    Views
    2,007

    Well, looks like I'm a day late and a dollar...

    Well, looks like I'm a day late and a dollar short. Make that two days.:o
  27. Thread: Cvhe080

    by IGBTech
    Replies
    18
    Views
    2,007

    Raising condenser water temperature can help (if...

    Raising condenser water temperature can help (if you have a hard time getting to full load).
  28. Replies
    7
    Views
    3,847

    Iced up suction line could be low air flow, low...

    Iced up suction line could be low air flow, low charge, dirty evap., plugged metering device. Try running the indoor fan (only-no cooling) to see if you can melt the ice. Maybe you can get enough...
  29. If your system runs at half load all the time due...

    If your system runs at half load all the time due to low air flows, it could possibly need dual suction risers at the evap? Hotgas bypass out to the evap (outlet of txv) would definitly help with...
  30. Replies
    339
    Views
    49,036

    O.K. gotta chime in. From Las Vegas NV (lost...

    O.K. gotta chime in. From Las Vegas NV (lost wages to some of you).In the chiller biz now, finnally! Some cool stuff out here, but don't worry, we'll blow it up soon enough.:rolleyes: Been in the...
  31. Replies
    25
    Views
    2,379

    Out here in the desert I've seen guys use 400 sq...

    Out here in the desert I've seen guys use 400 sq ft per ton - 8' ceilings. Seems to work O.K. but shootin' from the hip none the less. Pretty dry and "shady" out here though, like the other guys said...
  32. Replies
    16
    Views
    2,676

    Thanks again for all the replies guys. Talked to...

    Thanks again for all the replies guys. Talked to the customer today, he says can't have it till late sept. (oh well his machine). I've got more questions to post so I look forward to your replies.:D
  33. Replies
    16
    Views
    2,676

    Thanks Frank! I'll be sure to give him a shout....

    Thanks Frank! I'll be sure to give him a shout. :cool:
  34. Replies
    16
    Views
    2,676

    Thanks for the info guys! Any idea where I can...

    Thanks for the info guys! Any idea where I can find the part number? No hurry, it's supposed to be 114 next week and getting hotter. It's on a hospital emergency room and the customer is probably not...
  35. Replies
    16
    Views
    2,676

    The oil filter was changed last year at end of...

    The oil filter was changed last year at end of season by another tech w/our company. We replaced both solenoids even though the old ones looked fine. I tried placing the slide in "hold" and valved of...
  36. Replies
    16
    Views
    2,676

    Trane Screw Question

    We've got a small RTHB130 chiller with loading/unloading problems (overshoots the setpoint). Replaced solenoids, changed PID, good flows, good charge. Holds dishcharge superheat nicely but when we...
  37. Replies
    0
    Views
    405

    Yet another test

    Testing the water.:eek:
Results 1 to 37 of 44

Related Forums

Plumbing Talks | Contractor MagazineThe place where Electrical professionals meet.
Comfortech365 Virtual Event