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  1. Replies
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    673

    With the quality of the copper these days, I...

    With the quality of the copper these days, I don't think it matters whether you use soft in 50 ft rolls or 20 ft lengths of ACR hard drawn tubing. Just keep it as dry as possible so as to avoid...
  2. Thanks for the pics! That HGBP setup is a clean,...

    Thanks for the pics! That HGBP setup is a clean, almost factory looking job.

    The ORIT is what I expected at the top end. It would be good to get an idea of what they did down below. I'm still...
  3. Replies
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    306

    I've used grapefruit juice on new machines. It...

    I've used grapefruit juice on new machines. It helps promote a more even flow over the new evaps. It's not a strong enough acid for cleaning though.
  4. If the ORIT is intended to regulate the...

    If the ORIT is intended to regulate the evaporator pressure of one or more of the circuits, those circuits would need to be a higher temp than the main coolers, not low temp.
  5. It's very possible this second suction line is...

    It's very possible this second suction line is actually part of a rather clever double riser setup.

    Since this system can unload to virtually zero load, a double riser is needed and can be...
  6. What is this second suction line with the ORIT...

    What is this second suction line with the ORIT connected to? It's not clear to me what it's for, but somebody must have had a good reason to go to a lot of trouble to install it.
  7. The BZT025M6 has a receiver capacity of 14 lbs at...

    The BZT025M6 has a receiver capacity of 14 lbs at 90% full. If it was installed in 2006, then it must have the old copper tube/aluminum fin type condenser, so that would give you a couple of pounds...
  8. Replies
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    567

    In my experience, I found one brand's stiffness...

    In my experience, I found one brand's stiffness when cold might be more (or less) pronounced than another.

    Armaflex brand insulation seemed to me to remain more flexible and workable when cold...
  9. If the caulk is on the inside and not on the...

    If the caulk is on the inside and not on the outside, then moisture will condense in panel and the caulk is trapping the water...except where it's leaking out. A total outside vapor barrier is your...
  10. Here are some ideas. I've used the ones with...

    Here are some ideas. I've used the ones with vinegar and coffee with some success:

    http://www.wikihow.com/Get-Bad-Smells-out-of-a-Microwave
  11. Are all of the panel joints for this box caulked?...

    Are all of the panel joints for this box caulked? Are they caulked on the outside or on the inside?

    I say this because most prefab cooler panels are designed with sealing strips which seal the...
  12. Replies
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    501

    I don't recall ever seeing Manitowoc remote with...

    I don't recall ever seeing Manitowoc remote with a fan cycle control.
  13. Replies
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    870

    What is the "Copeland Air Conditioning Training...

    What is the "Copeland Air Conditioning Training Manual"? I'm not familiar with that one. Got a link?

    What exactly is it stating differently?
  14. Replies
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    870

    The student should take this as a learning...

    The student should take this as a learning experience. He will learn that he is being tested not on facts, but what he was to study in the assigned text.
  15. Replies
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    870

    Copeland has Application Engineering guidelines...

    Copeland has Application Engineering guidelines for when crankcase heaters are required. One such condition is when the total system refrigerant charge doesn't exceed the stated amount for a...
  16. Replies
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    870

    Here's an old Copeland video about flooded...

    Here's an old Copeland video about flooded starts:



    https://www.youtube.com/watch?v=lpluyTCeSRQ
  17. Replies
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    1,811

    :ditto: Pop the head and check the valves. ...

    :ditto:

    Pop the head and check the valves. Chances are good you can get it back to work with a valve plate kit:

    Copeland P/N 998-0661-16
  18. Replies
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    1,650

    Many of my customers in Florida were on well...

    Many of my customers in Florida were on well water systems with some of the highest mineral contents in the country...not to mention the hydrogen sulfide. In spite of what many ice machine...
  19. Replies
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    1,811

    This is from the True Tech Service Manual (2002):...

    This is from the True Tech Service Manual (2002):

    533441

    They say 15F. I was close. ;)
  20. Replies
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    1,811

    If a past service has already included charging...

    If a past service has already included charging (or even just topping off) with R404A you may well have a plugged cap tube and/or filter-drier and not a leak. Many techs will do an unsuccessful leak...
  21. Replies
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    1,355

    Tecumseh makes some little compressors: ...

    Tecumseh makes some little compressors: http://www.masterflux.com/userimages/Brochure/MX_Catalog.pdf
  22. Replies
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    778

    I will agree with Jettinvr6sc. I worked for D/B...

    I will agree with Jettinvr6sc. I worked for D/B starting in 1977 in commercial refrigeration sales. I saw a few of those in my travels, but they had been discontinued long before that...probably...
  23. Replies
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    2,120

    I've had one of those for many years. In a...

    I've had one of those for many years.



    In a pinch I've used refrigerant. I found it seems to permeate through the rubber fairly rapidly, but it'll get you home. ;)
  24. Replies
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    2,120

    This is an article from a pro-nitrogen tire...

    This is an article from a pro-nitrogen tire group, but it appears to be factual info:
    ...
  25. Replies
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    1,057

    I have long been suspicious of the "OEM" cap...

    I have long been suspicious of the "OEM" cap tubes that are always exactly 10 ft in length. That is simply too much of a coincidence.

    I have used the Tecumseh cap tube selection program with...
  26. Replies
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    1,274

    Arriving at an accurate and yet realistic load...

    Arriving at an accurate and yet realistic load estimate may be two different things. BeerMe's earlier response about the low load figure looks too low and how they'll never hold temps as soon as the...
  27. Replies
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    1,274

    I would take a serious look at adding a larger...

    I would take a serious look at adding a larger receiver, a suction accumulator and a hot gas bypass valve with desuperheating expansion valve (at the condensing unit). If the condensing unit is...
  28. Replies
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    3,294

    Capillary action or wicking is a result of the...

    Capillary action or wicking is a result of the effects of surface tension and adhesion of a liquid, typically in a very small diameter tube. I don't see how this could possibly apply to a...
  29. Replies
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    3,294

    When you state "venting a stream of relieved high...

    When you state "venting a stream of relieved high pressure gas", I then assume it's a refrigeration system which is being vented and the gas is dry, as it would normally be in operation. I also...
  30. Replies
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    710

    Something like these mini-CB's with the "D" trip...

    Something like these mini-CB's with the "D" trip rating might work:

    http://www.automationdirect.com/static/specs/wmztminicircuitbreakers.pdf
  31. Replies
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    710

    I've only seen this on a job I was on some 30...

    I've only seen this on a job I was on some 30 years ago when I worked for Dunham-Bush. I don't recall what the fix was unfortunately. I suggest you call the transformer manufacturer as they will...
  32. Replies
    13
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    710

    It sounds like the fuses are popping due to the...

    It sounds like the fuses are popping due to the inrush current during power-up of the transformer. This can happen even with no load on the secondary windings. Are they slow-blow fuses?
  33. Replies
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    430

    Copeland used to have the voltage correction...

    Copeland used to have the voltage correction noted on their printed performance curves...back in the day when they were real plotted curves. I recall seeing it more recently, but I forget where that...
  34. Replies
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    430

    The amp draw is inversely proportional to the...

    The amp draw is inversely proportional to the supply voltage, so it's

    (Rated Volts) / (Actual Volts) x Rated Amps = Actual Amps

    For 208V, the proportion would be 230/208 or x 1.105 or about...
  35. Replies
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    538

    I believe Aspera has been absorbed by Embraco to...

    I believe Aspera has been absorbed by Embraco to the point where they don't even acknowledge the Aspera name any more. Also, Copeland has rather close ties to the old Aspera line as their A-Series...
  36. I usually inserted the sensing tube into the...

    I usually inserted the sensing tube into the center of the coil (from the back side where possible). I never found the location on the coil made much of a difference, as it was more important to get...
  37. Replies
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    I bought an "off-lease" Panasonic Toughbook CF-28...

    I bought an "off-lease" Panasonic Toughbook CF-28 ruggedized laptop from Tiger Direct which had been refurbished by a factory refurbisher. It was three years old at the time and it looked like new....
  38. I bought my first calculator in 1972. It was a...

    I bought my first calculator in 1972. It was a Texas Instruments, ate batteries for breakfast and didn't even do square roots. It cost $99, which was a lot of money in those days.
  39. I had two customers ruin their Manitowoc cubers...

    I had two customers ruin their Manitowoc cubers by "cleaning" them with CLR.
  40. I haven't seen a Manitowoc evaporator flake or...

    I haven't seen a Manitowoc evaporator flake or peel since they went to a chemical bonding type of nickel plating back around the introduction of the B-Series cuber. Like BBeerme said, the plating...
  41. For a truly nasty, grease-laden condenser I...

    For a truly nasty, grease-laden condenser I almost always removed the coil (or even the whole condensing unit) and used an alkaline cleaner (like NuBrite) outside where you could do a much more...
  42. In the mid 1980's I worked for a market chain...

    In the mid 1980's I worked for a market chain based in the Harford area. We needed three different pagers to cover our territory from Boston to Long Island. At that time, "bag phone" signals were...
  43. Replies
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    There's a VERY LONG thread discussing this here:...

    There's a VERY LONG thread discussing this here:

    http://hvac-talk.com/vbb/showthread.php?1117911-quot-Ice-Cold-quot-Refrigerant-quot-conditioner-quot
  44. The Imperial IMP is a mini tubing cutter for...

    The Imperial IMP is a mini tubing cutter for 1/8"-5/8". Mine was probably 30 years old when I lost it. :(


    http://www.trutechtools.com/assets/images/tc-2050.jpg
  45. I remember helping remove, repair and re-install...

    I remember helping remove, repair and re-install an old Remington window A/C back in the 1960's. It was huge and heavy with that 3/4 HP R12 Copelametic in there.

    We used to refill steel...
  46. Replies
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    12,744

    CO2 purge while brazing is mentioned in the Tyler...

    CO2 purge while brazing is mentioned in the Tyler I&O Manual on p.2-1:

    http://www.hillphoenix.com/tyler/mechanical/5806448_TylerMSD-ISManual-lowrez.pdf
  47. Replies
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    349

    If it's less than 20 years old the expanding...

    If it's less than 20 years old the expanding agent in the insulation was probably an HCFC or an HFC. Before that, CFCs were common.
  48. Replies
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    487

    Is this a Kelvinator Commercial freezer by...

    Is this a Kelvinator Commercial freezer by chance? (See p.4):

    http://primasupply.com/images/brochure.pdf

    The XDX also was licensed to Beverage Air back when Carrier owned them.
  49. Replies
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    462

    Go back to your basics and think about what you...

    Go back to your basics and think about what you said there. :putergreet:

    As for the location, I don't think it makes much difference whether it's before or after the condenser. If I had to...
  50. Replies
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    Well...perhaps not as bad as all that. At least...

    Well...perhaps not as bad as all that. At least it'll start when it's raining...if the battery isn't dead. ;)

    I remember drying off the distributor cap of my brother's MG and sealing the carbon...
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