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  1. Replies
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    Good news!

    Good news!
  2. Replies
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    .

    .
  3. We used 1⅝" soft copper for underfloor runs back...

    We used 1⅝" soft copper for underfloor runs back in the day. The largest soft drawn I've seen is 2⅛" type L, which was a shorter 40 ft roll as I recall, but prone to kinking.

    I've always run...
  4. Yes, a grossly oversized system will shorten the...

    Yes, a grossly oversized system will shorten the rune times enough to cause high RH issues. In this case, it looks to be a pretty good load vs capacity, especially if you account for a large...
  5. Yes, the 1⅛" and " are perfect for this system....

    Yes, the 1⅛" and " are perfect for this system.

    810890
  6. Yes, it's all about the frost. The initial,...

    Yes, it's all about the frost. The initial, widely spaced rows of the coil knock down a good percentage of the moisture in the return air, thus capturing it as heavy frost. The next rows then cool...
  7. Yes, the correction factor is primarily needed to...

    Yes, the correction factor is primarily needed to account for the greater or lower heat transfer due to frosting of the coil above or below the rated -20F evaporator temperature.

    The fins per...
  8. At this much lower compression ratio with a much...

    At this much lower compression ratio with a much lower capacity refrigerant, this compressor will be running cooler than it ever did. Besides, the ZF comes with liquid injection, which is need for...
  9. My quick estimate for the load is around 25,000...

    My quick estimate for the load is around 25,000 Btuh and you'd be 20% above that with the smaller coil. The larger coil would gain another 2000 Btuh or so, but the higher humidity could be a problem...
  10. With (1) TPLP422 I estimate the system capacity...

    With (1) TPLP422 I estimate the system capacity for a 35F box to be 30,030 Btuh at a 23.4F evap temp and 120F SCT with R134A.

    810886810887
  11. That coil capacity corrected for the +25F evap...

    That coil capacity corrected for the +25F evap temp would be 27,000 x 1.15 or 31,050 Btuh. That would be a bit bigger than you need. The TPLP422 would be better.
  12. C-charge R134A

    C-charge R134A
  13. All you really need for this is one evaporator...

    All you really need for this is one evaporator and the smaller condensing unit running R134A. The capacity would still be around 28,000 Btuh.

    If you used two evaporators the humidity will be too...
  14. Replies
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    If it's Hobart 770206 Brazing Rod then it's...

    If it's Hobart 770206 Brazing Rod then it's self-fluxing.
  15. Good catch on the evaporator temperature...

    Good catch on the evaporator temperature correction factor. So it would definitely be better to run R134A with one evap on the smaller unit and two for the larger one to keep the TD's up.
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    I doubt the epoxy is going to work now that there...

    I doubt the epoxy is going to work now that there are no microchannels left to plug.
  17. When I have done R404A low temp to R134A medium...

    When I have done R404A low temp to R134A medium temp conversions in the past, I found the TXV size is roughly the same, so all that needs to be changed is the powerhead.
  18. An alternate matchup would be to run (1) evap for...

    An alternate matchup would be to run (1) evap for the smaller unit for a TD of about 15F and and (2) evaps for the larger one for an 11F TD. This may the better fit for the smaller box and would...
  19. This is the best route to take for this job. ...

    This is the best route to take for this job.

    The TZEA060L6 has a ZF18K4E compressor which with R134A at +25 F SST has a capacity of 32,100 Btuh. This would match up fairly well with (2) TLP442LE...
  20. Replies
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    Johnstone Supply P/N B81-567 Red Epoxy ...

    Johnstone Supply P/N B81-567 Red Epoxy https://www.johnstonesupply.com/storefront/product-view.ep?pID=B81-567 (I can't get into their site to check stock.)

    Baker Distributing show no stock in...
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    I quit smoking cold turkey 6 years ago, the very...

    I quit smoking cold turkey 6 years ago, the very day I left Florida to move to Ecuador. The quitting wasn't nearly as difficult as before with a couple of other failed attempts, I suppose because...
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    PART 2 ...

    PART 2



    https://www.youtube.com/watch?v=zSpp-5nGI4k
  23. Replies
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    I believe it was the Nortec video recommended Red...

    I believe it was the Nortec video recommended Red Epoxy which is a heat-cured two-part epoxy by Highside Chemicals. This stuff has been around forever and is good for HVAC & Refrigeration and is...
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    I have to say that while I've never attempted a...

    I have to say that while I've never attempted a repair on a microchannel coil, from what I've read and seen in a couple of good videos, the key points seem to be don't overheat, don't melt the base...
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    Heatcraft says to use a two-part heat-cured epoxy...

    Heatcraft says to use a two-part heat-cured epoxy for leak repairs on their Hypercore microchannel condensers.

    The procedure is to basically eliminate the leaking condenser channels by plugging it...
  26. Replies
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    Very well stated, although I would avoid using...

    Very well stated, although I would avoid using the term "variable", instead using "self-regulating" as shellkamp suggested.
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    You will need to use your laptop for this......

    You will need to use your laptop for this...
    810786




    [*=1]Go to the thread you want to receive new post notifications for.
    [*=1]At the top-right of the thread page you'll see a light gray...
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    Interestingly, Imperial Tools and Diversitech...

    Interestingly, Imperial Tools and Diversitech have resurrected the Annie hermetic analyzer: https://imperial-tools.com/products/hermeti-check/
    ...
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    Or be creative. Use the stainless bolts and add...

    Or be creative. Use the stainless bolts and add an anti-sweat heater. ;)
  30. Replies
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    I sent a copy of the original email to you just...

    I sent a copy of the original email to you just now.
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    Here are some Ardco manuals (Ardco now owned by...

    Here are some Ardco manuals (Ardco now owned by Anthony): https://www.tmrep.com/images/ServiceOlder.pdf

    See pages 8-10 for where to find the model number on the door frame.
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    You sent in your application last October, but...

    You sent in your application last October, but didn't provide any documentation as required. Zippyhead applied on Friday night, included a copy of his EPA card and got his Pro status on Sunday...
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    You mean Twilly? He's still on the Membership...

    You mean Twilly? He's still on the Membership Committee. He doesn't resemble Tiggy at all. ;)




    I'm back down at sea level, so I have reverted to the old fashioned method...beer.
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    Argus appears to be just another re-branded POS...

    Argus appears to be just another re-branded POS of asian manufacture, with litlle to no representation, support or local parts availability.

    The issue of electronics, and specifically the...
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    The Membership Committee Chair (me) has received...

    The Membership Committee Chair (me) has received your application and has completed its initial review. It's now sent out to the Membership Committee members for their review and vote and...
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    Standard design supply temperature for cooling...

    Standard design supply temperature for cooling tower water is 85F for commercial refrigeration units and 75F for city water.

    Was this refrigeration unit connected to city water previously? ...
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    Here's an excerpt from the Membership Committee...

    Here's an excerpt from the Membership Committee email sent to those who have not completed their profiles:


    All applicants are required to included (at a minimum) their location (City, State) and...
  38. Replies
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    Try running the Tecumseh application again for...

    Try running the Tecumseh application again for your metric calculation.

    I tried to duplicate your result and found a possible reason for the difference you received.

    On the initial page after...
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    If you go with the 0F setpoint for this box then...

    If you go with the 0F setpoint for this box then the 7500 Btuh evaporator would be my choice. It would give you a 10.8F TD and 8088 Btuh capacity.

    810548
  40. Replies
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    If it's popsicles, then 0F is the recommended...

    If it's popsicles, then 0F is the recommended temperature. Ice cream will still be firm for short-term storage at 0F. Dipping temperature is about +5 F.
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    I ran a quick load calc with the Tecumseh Boxload...

    I ran a quick load calc with the Tecumseh Boxload program and for 8' L x 6' W x 8' H, -10F heavy use, I got 6300 Btuh required.

    Using the Copeland OPI page, the FJAL-B200-CFV condensing unit...
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    I edited my post after noticing that he had...

    I edited my post after noticing that he had posted the condensing unit model. Thanks.
  43. Replies
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    What is the design temperature for this freezer? ...

    What is the design temperature for this freezer? 0F? -10F? or what?

    You need to know the box temperature to properly match up condensing unit and evaporator. It's also helpful to know the...
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    You haven't said that you have checked for a...

    You haven't said that you have checked for a clear sightglass, which is your best indicator of a full charge

    The primary cause of short cycling on a system like this is a low charge. If the...
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    What is the reason for replacing this control? ...

    What is the reason for replacing this control? Is there a temperature probe failure alarm displayed like P1, P2 or P3? ...or is there no display at all?

    Here's the manual for the Dixell XW60VS...
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    I've never seen it addressed. There is likely a...

    I've never seen it addressed. There is likely a difference, but we don't have any numbers available (that I know of) to be able to quantify it.
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    Another possibility for those bumps or blisters...

    Another possibility for those bumps or blisters in the copper is ice.

    At that end of the coil it's common to have a permanent buildup of frost and ice. When there's a continual cycle of...
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    My guess is was like from the git-go. You...

    My guess is was like from the git-go. You wouldn't likely ever notice it unless you were looking for a leak in that area of the coil.
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    When you said blistering I thought it was some...

    When you said blistering I thought it was some form of corrosion, but that looks to me to be the result of the original coil manufacturing process where the copper tube is expanded into the aluminum...
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    Price isn't everything. Where are they made? ...

    Price isn't everything. Where are they made? Last I knew they're made in S. Korea and their quality was average at best.

    Who's selling them and do they have good parts availablity, as in on the...
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