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  1. Thread: TXV question

    by jdenyer
    Replies
    11
    Views
    1,333

    Ok got back to this unit this weekend, looked at...

    Ok got back to this unit this weekend, looked at condenser coil again, seemed a little dirty, checked discharge line temp, 233 degrees F, yikes a little high, cleaned the ever loving crap out of the...
  2. Thread: TXV question

    by jdenyer
    Replies
    11
    Views
    1,333

    Yes this is the same box, and I'm not "new" to...

    Yes this is the same box, and I'm not "new" to refrigeration, I probably do 3-4 of these type things with refrigeration a year, I just don't have a lot of experience with TXVs. And not doing a whole...
  3. Thread: TXV question

    by jdenyer
    Replies
    11
    Views
    1,333

    I don't have the model numbers in front of me at...

    I don't have the model numbers in front of me at the moment, but this is a walkin cooler running R409a, used to be R12. I know that the system is a match because it used to work great on R12. From my...
  4. Thread: TXV question

    by jdenyer
    Replies
    11
    Views
    1,333

    Ok guys, I'm a little rusty on TXV operation....

    Ok guys, I'm a little rusty on TXV operation. While I understand the basics, ie 3 balancing forces etc, which way do you turn the stem if you want the valve closed down some, I would assume...
  5. Replies
    13
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    1,257

    I did change the oil in the comp to AB, and yes I...

    I did change the oil in the comp to AB, and yes I did charge as a liquid. When I go back at the end of the week I will get some numbers for ya. Again thanks for the help, it really has me scratching...
  6. Replies
    13
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    1,257

    Thank you for the fast response. Ok I do realize...

    Thank you for the fast response. Ok I do realize that 409 runs a higher head. SH at SSV was 20 degrees, SC after drier was 2 degrees, if I try to bring the subcooling up by adding more gas my head...
  7. Replies
    13
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    1,257

    Ok, question for the refrigeration gurus here. I...

    Ok, question for the refrigeration gurus here. I have a walk in cooler that we just hooked up that is running R409a, TXV is the expansion device. This is a unit that's about 15 years old and used to...
  8. I believe Thermo-Pride has lifetime warranty on...

    I believe Thermo-Pride has lifetime warranty on the heat exchanger, I could be wrong though. Thermo-Prides are built like tanks. My mother has one that is heading for 30 years, still in great shape.
  9. Replies
    17
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    1,194

    Is the primary drain clogged? Are you sure? Use a...

    Is the primary drain clogged? Are you sure? Use a wet/dry shop vac to clear it out. Water only comes out of the secondary drain ie overflow when the main or primary drain is plugged. Hope this helps.
  10. Replies
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    1,597

    I'd be calling the company that lost them and...

    I'd be calling the company that lost them and tell them they had better reappear, and soon:D
  11. Replies
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    1,482

    Dave, thanks for the response, I knew that I had...

    Dave, thanks for the response, I knew that I had read this could be done on small pot comps. This really is not an emergency as there is nothing in the cooler at this point. I will be meeting with...
  12. Replies
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    1,482

    I don't need to change the oil in the 404A unit...

    I don't need to change the oil in the 404A unit because they were actually smart enought to cap it, go figure. The condensing unit for the cooler is no spring chicken and would probably only last...
  13. Replies
    13
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    1,482

    Dave, I remember reading in a post a long...

    Dave,

    I remember reading in a post a long time ago that you can use an interim blend like MP39 with mineral oil in the comp if the system is small. Here's the situation, I'm re-installing a...
  14. Replies
    100
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    10,511

    Mark, you are the man, nice job. Glad to see this...

    Mark, you are the man, nice job. Glad to see this get straightened out.
  15. Hey I'm 2 for 2 today:D Oh well I still feel bad...

    Hey I'm 2 for 2 today:D Oh well I still feel bad for running my mouth without fully reading the post and my apology still stands.
  16. Oh my, I didn't read ericrocks post closely...

    Oh my, I didn't read ericrocks post closely enough and upon second glance see that he mentioned about the unit running longer. He was just trying to dis-prove a myth. My apologies to you. It wasn't...
  17. Keep in mind that as you lower the temp at the...

    Keep in mind that as you lower the temp at the condenser as caused by misting, the greater the superheat. You are doing this on a fixed metering device, so the only thing that you are really doing is...
  18. Replies
    6
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    693

    Well is this electrician licensed by the EPA to...

    Well is this electrician licensed by the EPA to handle refrigerants? Does he own a vacuum pump? So you are gonna do most of the install yourself and have a buddy of yours do the startup. Well I gave...
  19. Replies
    6
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    693

    First no pricing discussions are allowed per site...

    First no pricing discussions are allowed per site rules that you agreed to when you signed up. Second who is going to install this system that you bought off the internet. Are you EPA certified to...
  20. Replies
    6
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    2,193

    Can't charge by pressures alone, systems using a...

    Can't charge by pressures alone, systems using a TXV are charged by subcooling. Let me explain why. The job of the TXV is to vary the amount of refrigerant into the evaporator to match the heat load...
  21. Replies
    11
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    835

    Please don't take this personally, but you should...

    Please don't take this personally, but you should not have tried to do this yourself. If you did fry something it's gonna cost you a lot more now to get it fixed than if you paid a tech to install...
  22. Replies
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    Excellent point Clark, I did not realize that...

    Excellent point Clark, I did not realize that Mark was in this guys area. Mark would get it diagnosed and fixed right for you. Without actually being there we are all just playing a guessing game. If...
  23. Replies
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    Ok just re read the entire thread and noticed you...

    Ok just re read the entire thread and noticed you mentioning that the return box was hot, you are either sucking in hot attic air thru a return duct leak, or their is a heatsource, ie furnace or...
  24. Replies
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    10,511

    Ok, the tech is saying that the Delta T across...

    Ok, the tech is saying that the Delta T across the coil is 19.5 degrees, this means that the system itself is probably working fine. Your problem at this point appears the be the ductwork, and is...
  25. Replies
    100
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    10,511

    Still need pressures and temps though, your only...

    Still need pressures and temps though, your only looking at one side of the system and not the refrigeration side. You could replace all the duct work and still not have adequate cooling.
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