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  1. Replies
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    Thanks guys. I have a wire on the common side of...

    Thanks guys. I have a wire on the common side of the relay going directly to chassis ground to eliminate that common break possibility.

    I replaced that relay and the low speed relay just to be...
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    Bizarre Aaon problem

    I don't know what you're talking about with Eac6. There are two wires coming off relay one. One is as you describe through safeties and to the ignition module. The other wire goes directly to a...
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    Bizarre Aaon problem

    The mod x board brings the combustion relay and energizes the ignition module, at least on this one. Then it modulates based on supply air temp.

    It seems that it's the combustion fan relay that...
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    I didn't test it, but I did follow it out to the...

    I didn't test it, but I did follow it out to the panel. It definitely felt to me like a ground issue and I did pursue it.


    Sent from my iPhone using Tapatalk
  5. Replies
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    Bizarre Aaon problem

    Seimans did some amazing things on this job. They put it in and worked on it for a year straight. It never worked. The day before the warranty expired they went through and commented out most of...
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    1,217

    I had intended to put this in the pro forum,...

    I had intended to put this in the pro forum, seems like there's more activity there.

    I'm going to copy this over there and try to delete this myself, not sure if I can. mods feel free.

    ...
  7. Replies
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    1,428

    What a great post, thank you! I'm working on my...

    What a great post, thank you! I'm working on my first piece of logic right now, two mcquay units with their microtech2 controllers ripped out and Andover calling all the shots. We will be replacing...
  8. Replies
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    Bizarre Aaon problem

    Aaon package unit with a reheat board and a modgas board, controlled by Seimans.

    On a call for heat the combustion relay intermittently fails to pull in, leading to a timeout and lockout.
    ...
  9. Replies
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    Thanks guys. Hungry, I'm glad to hear you...

    Thanks guys. Hungry, I'm glad to hear you successfully made the shift. Honestly it's extremely reassuring, because I was just looking at a wire sheet in work bench that I couldn't have dreamed of...
  10. Ha ok I get it, thank you Sent from my...

    Ha ok I get it, thank you


    Sent from my iPhone using Tapatalk
  11. I have to ask.... Why does that make life...

    I have to ask.... Why does that make life difficult?


    Sent from my iPhone using Tapatalk
  12. Replies
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    Perfect, thanks Tridium tech. I'm finding the...

    Perfect, thanks Tridium tech. I'm finding the grey manual to be pretty good reading, it's an odd juxtaposition between stuff that's way beneath me and stuff that's over my head. I'm just kinda...
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    Oh cool, I am doing that now then. So their...

    Oh cool, I am doing that now then. So their pretty good with providing support? Same day type stuff?

    I will tell him the Aussie said hi, ha.


    Sent from my iPhone using Tapatalk
  14. If i may dumb this thread up a bit, what is the...

    If i may dumb this thread up a bit, what is the type and instance within the object identifier?
  15. Replies
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    entering controls world

    I work for a mechanical contractor who is about to enter the controls world installing ASI controls. I'm Niagara certified but never got much practice, I'm still a mechanic. I do get around controls...
  16. Replies
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    Or inside, this orifice right here may be...

    Or inside, this orifice right here may be plugged. If I had to place a bet, it would be that ultimately this is where your going to find the oil. 572781
  17. Replies
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    Aaahhh. That changes things. Well is there an...

    Aaahhh. That changes things. Well is there an oil line off the accumulator? There may be an orifice in it meant to get the oil back to the comp. with an intentionally oversized coil like that,...
  18. Replies
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    4,855

    Does bypass have a solenoid? Can you jam a...

    Does bypass have a solenoid? Can you jam a screwdriver in it and turn it off?
  19. Replies
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    4,855

    That's before or after accum? You would want...

    That's before or after accum?

    You would want to check both coil SH, make sure both feeding evenly.
  20. Replies
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    Are you getting that suction pressure before or...

    Are you getting that suction pressure before or after the accumulator? Can you get to the other side of it too?

    Do the coils have LL solenoids as part of staging?
  21. Replies
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    Copeland semi hermetic

    50#? I'm usually looking for the LAT to be in the neighborhood of 12 deg above the saturated temperature of the coil. Do you have 40 degree supply air?

    If you do do- what is RAT? If you have a...
  22. Replies
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    Wow I had the same thing. It was a big site, wire...

    Wow I had the same thing. It was a big site, wire slipped, building main tripped, and a very expensive server died.

    My boss drove 7 hours to meet me the next morning. His beef was this- I had to...
  23. Replies
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    He said it's got 15 actually. Tucked away in the...

    He said it's got 15 actually. Tucked away in the OP...
  24. Replies
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    Copeland semi hermetic

    Please try to follow up. I'm interested in this one.

    Receiver TECHNICALLY will negate the subcooling though it's common to read subcooling after it. Did you check superheat at both circuits...
  25. Thread: PSI

    by B_roche
    Replies
    22
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    2,566

    Same. Even on scrolls, never busted one.

    Same. Even on scrolls, never busted one.
  26. A TXV vs. cap tube would probably have a big...

    A TXV vs. cap tube would probably have a big effect on the outcome as well
  27. Replies
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    Unloader pressures

    While I have always questioned myself, this is how I've thought of it- I THINK PD pumps like scrolls, recips, screws, actually do "suck" on the suction side. As it loads, capacity to draw increases...
  28. Replies
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    I've never come across this stat. If I'm...

    I've never come across this stat.

    If I'm reading this right, I can set this up to do anything in it's range of capability right there on the controller...is that accurate?

    I.E. I don't need...
  29. Replies
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    Sent from my MZ601 using Tapatalk

    Sent from my MZ601 using Tapatalk
  30. Replies
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    Embedded workbench problem

    I have a building with a JACE running some spider controllers. On a call for a runaway zone (85 deg in courtroom) I found the engineers computer showing a 165 deg set point. He would change it...
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    I'm gonna cast a vote for keeping the EPR. If you...

    I'm gonna cast a vote for keeping the EPR. If you go MOP your really tightening the range on what you can get away with but with a CPR- let er flow. Your safe.

    Also, I would absolutely do this...
  32. Replies
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    condenser swap-low compression ratio

    Customer provided a condenser, hired us to recover from a fairly young leibert CU carcass then pipe in and charge replacement.

    When charging I found that the evap appeared to be overfed. I wound...
  33. Replies
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    The 80 percent furnace should be in a flue liner...

    The 80 percent furnace should be in a flue liner I'm sure.

    Sent from my MZ601 using Tapatalk
  34. Replies
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    In what I've been seeing in the small packages...

    In what I've been seeing in the small packages the fan has been wired in to y1 inside the unit. I'm not sure what the most common setup is in these little guys but that's what I've been coming...
  35. I can't help you, but I'd like to play along at...

    I can't help you, but I'd like to play along at home....

    Both compressors run independently but at the same time?

    Or one loads then stays loaded- the other brings up the rear on further...
  36. Is it a mcquay? Sent from my MZ601 using...

    Is it a mcquay?

    Sent from my MZ601 using Tapatalk
  37. Just for what it's worth, something I'm sure...

    Just for what it's worth, something I'm sure you're well aware of but tunnel visioned away from after brazing so close.....but the txv only does one job. It keeps superheat, not suction pressure. ...
  38. Replies
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    Actually I meant on the discharge. It's a very...

    Actually I meant on the discharge. It's a very dumb question but since it took like....none almost, I lobbed that one out there for ya

    Sent from my MZ601 using Tapatalk
  39. Replies
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    King valve didn't stick did it? Sent from my...

    King valve didn't stick did it?

    Sent from my MZ601 using Tapatalk
  40. Replies
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    Scratch that, not what I meant to say and now I...

    Scratch that, not what I meant to say and now I can't delete it

    Sent from my MZ601 using Tapatalk
  41. Replies
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    I can't figure out what HPC is, help me out...

    I can't figure out what HPC is, help me out there?

    Sent from my MZ601 using Tapatalk
  42. Replies
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    I'll add that on a cool day the refrigerant will...

    I'll add that on a cool day the refrigerant will have less velocity through the evap. With less back pressure shoving it towards the compressor it has more time to suck up heat from the coil. ...
  43. In some cases if the drive lacks an external...

    In some cases if the drive lacks an external signal at f I think, it can act dead. Comes to life with the enabled command

    Sent from my MZ601 using Tapatalk
  44. I'd certainly be happy to. I can't get my tablet...

    I'd certainly be happy to. I can't get my tablet to attach it to the thread but I'll certainly email it to anyone who will read it.

    Sent from my Xoom using Tapatalk
  45. Experienced commercial tech, no luck in DC/MD/NOVA

    When the crook I was working for stopped paying me, I figured I'd be back to work inside of a week. That was late June I think, in the end he burned me for two weeks (not bad compared to some of the...
  46. MD is a big state

    MD is a big state
  47. Replies
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    Yeah since the dealership paid for the car I was...

    Yeah since the dealership paid for the car I was into them for 3,300. That negative 3,300 was my down payment. It was added to the price of the new car.

    The car we just bought was 20k we paid...
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    I jump at every opportunity to crowbar in a...

    I jump at every opportunity to crowbar in a picture of my little girl for sure.....but "Tapatalk" didn't play along on that one! I thought I deleted those.

    I couldn't go to "finance anybody"...
  49. Replies
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    Sent from my Xoom using Tapatalk

    Sent from my Xoom using Tapatalk
  50. Replies
    64
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    6,114

    Sent from my Xoom using Tapatalk

    Sent from my Xoom using Tapatalk
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