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  1. Replies
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    The ice blocks are made in another unit. This...

    The ice blocks are made in another unit. This chest freezer is only for storage of completed blocks.
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    Here's the spec sheet: ...

    Here's the spec sheet: https://www.hussmann.com/en/Technical%20Documents/0510175_J_RL_III.pdf

    For frozen foods use 970 Btuh/door at -14 and for ice cream use 1065 Btuh/door.

    You'll need ti...
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    !5 ft x 15 ft x 5 ft is an enormous chest...

    !5 ft x 15 ft x 5 ft is an enormous chest freezer. It's simply too big for a cold wall alone to be effective. Consider adding several vertical rows of evaporator tubing to split up the freezer into...
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    Where does the manufacturer;s information state...

    Where does the manufacturer;s information state that?
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    I used them on remote pizza prep tables where...

    I used them on remote pizza prep tables where they get moved every day for cleaning. The only problem I found was these hoses don't like to twist. They only want to bend.

    He should get the...
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    Those pressures appear to be within a normal...

    Those pressures appear to be within a normal range for a R134A prep table. Whey then would you suspect a restricted cap tube? 0 psig suction and 120 pisg discharge perhaps, but not with what we're...
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    Ritchie Engineering - Yellow Jacket makes a...

    Ritchie Engineering - Yellow Jacket makes a braided stainless steel flex hose for refrigeration applications. See p.30:...
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    Another thing about these factory installed TXV's...

    Another thing about these factory installed TXV's is they will be sized for the nominal 10F TD rating of the evaporator coil. IF for example you're doing a convenience store beer walk-in cooler and...
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    I'm glad I told you what happened to me. ...

    I'm glad I told you what happened to me. Otherwise you may not have checked for the loose cartridge.

    When I forgot to tighten the cartridge, it as early days for me and Q-body field assembled...
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    A common rule-of-thumb is 4F per turn, but in...

    A common rule-of-thumb is 4F per turn, but in reality the F per turn of the adjusting stem varies with the refrigerant and the evaporating temperature, so it's difficult to come up with a good rule...
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    The initial head pressure of 257 psig would be...

    The initial head pressure of 257 psig would be high for 80F ambient. The drop to 180 psig is typical with a wet coil.
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    I said that because a ZP TXV would be within its...

    I said that because a ZP TXV would be within its throttling range at 38 psig, so it should have been restricting flow. Typically with these MOP type valves you initially pull down with a starved...
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    R404A and TXV with a ZP pressure limiting...

    R404A and TXV with a ZP pressure limiting powerhead.

    He had 5F superheat at the compressor, which indicates flooding at the evaporator to me. With a 38 psig suction pressure, the evap should be...
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    Suction/liquid heat exchanger.

    Suction/liquid heat exchanger.
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    BTW...I've asked for this to be moved to a new...

    BTW...I've asked for this to be moved to a new thread. ;)
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    I once forgot to tighten down the cartridge in a...

    I once forgot to tighten down the cartridge in a Sporlan Q valve and got the same kind of floodback.
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    Never trust, therefore verify. Replace the valve.

    Never trust, therefore verify. Replace the valve.
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    My initial thought says the TXV isn't doing what...

    My initial thought says the TXV isn't doing what it's supposed to do...ie, control superheat.

    Did somebody assemble this valve for you and forget to put a cartridge in it? I've heard of that...
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    Good news!

    Good news!
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    .

    .
  21. 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...
  22. 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...
  23. Yes, the 1⅛" and " are perfect for this system....

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

    810890
  24. 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...
  25. 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...
  26. 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...
  27. 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...
  28. 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
  29. 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.
  30. C-charge R134A

    C-charge R134A
  31. 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...
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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.
  33. 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.
  35. 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.
  36. 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...
  37. 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...
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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
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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...
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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. ;)
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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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