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Type: Posts; User: glaird

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  1. Thanks for everyone's input. I thought I would...

    Thanks for everyone's input. I thought I would let you know what happened.

    I decided to install a TXV but after I made that decision, I could not find a location for the valve in the evaporator...
  2. I suppose that a txv that equalizes the pressure...

    I suppose that a txv that equalizes the pressure during off cycles is one that will not shut off completely.

    I have been looking for an AEV but since I am using MP66 I run the low side at a little...
  3. One must imagine that it is doing a pretty good...

    One must imagine that it is doing a pretty good job if it works to repair a condenser leak.

    I have never used JB Weld though I have heard lots about it. I work with a group of mechanics and the...
  4. The thing I like about an AEV (or TXV for that...

    The thing I like about an AEV (or TXV for that matter) is that it gives me some adjustment room. It is hard to tweek the operation with a cap tube and I doubt that I would get it right the first...
  5. A1 Burt; I was thinking that I didn't want to...

    A1 Burt; I was thinking that I didn't want to mess around with another cap tube since my current one is not working well and I thought I might as well upgrade the system while I had everything apart....
  6. I was thinking of using an AEV since the cooling...

    I was thinking of using an AEV since the cooling load is very constant and there is not an easy place to attach a TEV bulb. I would think that the AEV keeping the evaporator pressure constant would...
  7. Are you saying this because of the acid in the...

    Are you saying this because of the acid in the oil? I used Nu-Calgon's Phase III test kit and the color band turned completely clear. I don't know how much acid this indicates but the instructions...
  8. That's a good idea--I will look into this. ...

    That's a good idea--I will look into this.

    Thanks.
  9. Cap tube to Auto expansion valve--good/bad idea?

    Hi, I have this little 1/3 HP 1500 BTU freezer that I have been fooling around with. It was originally designed to use R12 with cap tube metering. I have changed it to MP66 refrigerant. I got it...
  10. Thread: AB Oil Odor?

    by glaird
    Replies
    9
    Views
    1,329

    Time flies... Just to let the previous posters...

    Time flies...
    Just to let the previous posters know, I finally had time to attend to this freezer and to check the oil for acid content. I got a Calgon Phase III acid test kit and drained some of...
  11. Thread: AB Oil Odor?

    by glaird
    Replies
    9
    Views
    1,329

    mmmdave is right, MP66 does go below atmosphere...

    mmmdave is right, MP66 does go below atmosphere at -20 F. With a leak of refrigerant, the supply to the evaporator (via a cap tube) probably was reduced and that probably reduced the low side...
  12. Thread: AB Oil Odor?

    by glaird
    Replies
    9
    Views
    1,329

    Thanks for your reply Mikep. The odor is more...

    Thanks for your reply Mikep.

    The odor is more like a latex paint smell than a solvent based smell like lacquer thinner. The smell is not really strong--it is sort of like being near a can of...
  13. Thread: AB Oil Odor?

    by glaird
    Replies
    9
    Views
    1,329

    AB Oil Odor?

    Hi,
    I am repairing a small 1/3 HP freezer that uses MP66 refrigerant with AB oil. It failed due to a refrigerant leak on the low side so I am sure that some amount of air was sucked into the...
  14. Replies
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    2,986

    In my circumstance described above, I just got...

    In my circumstance described above, I just got another service value and brazed it in. I looked around for teflon packing rope and didn't find any easily available.

    After I took the packing nut...
  15. Replies
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    3,265

    Jim, I did add an extra ounce to compensate for...

    Jim,
    I did add an extra ounce to compensate for the 032 filter over the copper spun filter. That may not be enough. The unit didn't work initially so I didn't know what the R12 values should have...
  16. Replies
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    Thanks to everyone for their help and advice. ...

    Thanks to everyone for their help and advice.

    Just for everyone's information, I cut 2" off the cap tube and resoldered it back into the 1/4 stub that is connected to the output of the liquid...
  17. Replies
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    3,265

    It takes about 6 minutes to get within 15 PSI of...

    It takes about 6 minutes to get within 15 PSI of equalization. So, it is slow.
  18. Replies
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    3,265

    I didn't know about the scoring method. I tried...

    I didn't know about the scoring method. I tried various other techniques that didn't work very well. I finally bought this little tool for cutting cap tubes--it has a blade somewhat like a wire...
  19. Replies
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    3,265

    That's a pretty nice chart! I haven't seen that...

    That's a pretty nice chart! I haven't seen that before.

    Thanks!
  20. Replies
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    3,265

    The filter had SAE flare fittings on both ends so...

    The filter had SAE flare fittings on both ends so I just disconnected the in/out piping and installed a new filter. I did install a Parker Gold Label Liquid Line Dryer LLD series size 032 as you...
  21. Replies
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    3,265

    I will check tomorrow morning. I have watched it...

    I will check tomorrow morning. I have watched it equalize but I haven't timed it--I would guess some few minutes.

    I will find out and let you know.
  22. Replies
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    The new compressor did come with AB oil. I...

    The new compressor did come with AB oil. I called the factory to check on that. When I had it all apart, I ran some nitrogen through the cap tube. I put 100 PSI at the input and I saw there was...
  23. Replies
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    3,265

    I thought of this at the time but since the...

    I thought of this at the time but since the compressor failed by "failing to pump though it was running" I thought there wouldn't be much external problems. That may have been wrong.
  24. Replies
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    3,265

    Compressor running hot?

    I have this ice cream vending machine that I am repairing. People on this forum have been very helpful with advice along the way. I have a couple of more questions. I have made a guess as to the...
  25. Replies
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    2,873

    Thanks for the clarification.

    Thanks for the clarification.
  26. Replies
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    2,873

    VTP99, I am wondering what you use to replace the...

    VTP99, I am wondering what you use to replace the start components--wouldn't these be the same components from the same manufacturer that you are replacing? Would these be any more likely to not...
  27. Replies
    34
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    2,873

    This compressor was a tecumseh and it did come...

    This compressor was a tecumseh and it did come with start components--a current relay and a capacitor. The capacitor was fine, the current relay did not engage. When I installed a 3 in 1 it started...
  28. Replies
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    2,873

    Just for everyone's interest, I have checked the...

    Just for everyone's interest, I have checked the current in the capacitor lead when it is trying to start--zero. So, this is what is going on. I will check the start relay and see if it is...
  29. Replies
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    2,873

    Thanks Jim for your advice. I should say that I...

    Thanks Jim for your advice. I should say that I didn't have a leak before I changed out the compressor. The compressor would run but it wouldn't pump.

    I left these details out because I wanted...
  30. Replies
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    2,873

    Liquid into the high side.

    Liquid into the high side.
  31. Replies
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    2,873

    Good Advice!

    Good Advice!
  32. Replies
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    2,873

    The data sheet says the LRA is 40 amps. The...

    The data sheet says the LRA is 40 amps. The current draw when it doesn't start is 28 amps. I have tested the starting components as much as I can--the capacitor is good, the current relay is in the...
  33. Replies
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    2,873

    Damaged Comp by High Pres Test/Evac?

    Hi,
    I have a 1/3 HP hermetically sealed compressor used in a low temp freezer (Tecumseh AEA2415AAB). I had a small leak in my system so I have pressure tested and evacuated this compressor a number...
  34. Replies
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    2,986

    I looked around in plumbing stores and didn't see...

    I looked around in plumbing stores and didn't see any small diameter packing rope. Grainger has some 3/32" so I will order a roll and give it a try. I am also going to see about getting a...
  35. Replies
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    2,986

    Gosh, Refrigeration Sales: What a great valve...

    Gosh,
    Refrigeration Sales: What a great valve catalog. If you are interested take a look. It looks like they have a $25 per line item minimum but they have lots of valves--maybe one that you would...
  36. Replies
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    I have talked to Tecumseh and the part number...

    I have talked to Tecumseh and the part number turns out to be: 56502-03 but Tecumseh doesn't have it in stock. The tech person there did send me a pdf of the valve and it looks like the same one. I...
  37. Replies
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    2,986

    This size that I have is 1/4" sweat in, flare...

    This size that I have is 1/4" sweat in, flare out. I imagine this is OEM since it came off of a Tecumseh condensing unit. I did check Tecumseh but found nothing.

    The valve looks similar to the...
  38. Replies
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    2,986

    icemeister, this is not the valve. It is similar...

    icemeister, this is not the valve. It is similar in that the body is square but it has a valve stem that sticks out the top and you turn the stem with a 1/4" square wrench. There is a cap that fits...
  39. Replies
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    The leak is coming up around the valve stem. I...

    The leak is coming up around the valve stem. I did unscrew the cap that surrounds the stem and I can see some packing material around the stem. I didn't know where you get the packing material or...
  40. Replies
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    2,986

    Service Valve - where to buy?

    Hi,
    I have a system with a pretty leaky service valve--it is leaking up through the stem. It is the square front seating/back seating type with a gauge port on the side. I have been trying to find...
  41. Replies
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    1,993

    The compressor, condenser and fan are part of a...

    The compressor, condenser and fan are part of a condenser unit manufactured by Tecumseh. I am sure that the vending machine manufacturer just purchased the condensing unit and installed it as a...
  42. Replies
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    1,993

    The condensing unit that contains the compressor...

    The condensing unit that contains the compressor has service values at the suction port and after the condenser. That is where I checked the pressures. I will try to check the old compressor...
  43. Replies
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    1,993

    I had disconnected the condenser fan motor when...

    I had disconnected the condenser fan motor when checking the compressor, so I actually heard the compressor. The motor was turning--I could feel a slight vibration with my hand on the housing. ...
  44. Replies
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    FarleyRedfield thanks for your thoughts. ...

    FarleyRedfield thanks for your thoughts. Regarding blowing out the oil; I wasn't trying to blow oil out, I had just imagined that putting 150 psi of nitrogen on the cap tube would cause this to...
  45. Replies
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    1,993

    This is all good advice. The unit is small as...

    This is all good advice. The unit is small as Intechbill guessed, this is a small system with 15 Oz of R-12 charge. I am changing the refrigerant to MP66 when I replace the compressor. The...
  46. Replies
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    Hi, I have the exact freezer that you are...

    Hi,
    I have the exact freezer that you are talking about. When it was first installed, the wiring to the outlet was done in 12 gauge wire and the outlet was protected with a 20 amp circuit breaker. ...
  47. Replies
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    1,993

    Capilary Tube Question

    Hi,
    I have taken apart an R-12 freezer where the compressor failed--the compressor motor turned but it did not do any compression. I asked about this in another thread and it was suggested that the...
  48. Replies
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    1,387

    The condensing unit's label is difficult to read....

    The condensing unit's label is difficult to read. It is a Tecumseh. I think the model number is 7A826640 though this number is not in any Tecumseh lists I have. The compressor model is: AE2415AA...
  49. Replies
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    This is one of the options that I thought about,...

    This is one of the options that I thought about, then others suggested replacing the compressor and changing the refrigerant. It is my machine so I would like to fix it up for the long haul. It is...
  50. Replies
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    1,387

    Pdrake65, are you saying that since I am cooling...

    Pdrake65, are you saying that since I am cooling a small space I don't need the cooling capacity of MP 66? So, for a small space, the capacity of MP39 will work fine and it will have less head...
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