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Type: Posts; User: rdhussmann

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  1. Replies
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    I put it in a few cars about 5 years ago. I...

    I put it in a few cars about 5 years ago. I never had any complaints.
  2. Replies
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    http://www.sporlan.com/90-40.pdf

    http://www.sporlan.com/90-40.pdf
  3. Replies
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    If the hot gas bypass has an air charged bulb, I...

    If the hot gas bypass has an air charged bulb, I would make sure it is located in the right place. Sporlan doesn't really recommend the suction line on the compressor. Especially if the unit is...
  4. Replies
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    2,184

    I agree with cxagent. I would suspect that the...

    I agree with cxagent.

    I would suspect that the hot gas bypass valve may be oversized for the compressor when unloaded. I have seen this problem before. Sometimes the valve is sized for the...
  5. The bottom of the receiver is solid liquid. I...

    The bottom of the receiver is solid liquid. I see subcooling at the outlet of the receiver right now. Saturated condensing temperature is 110 and the liquid temp leaving the receiver is 97. It's...
  6. Replies
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    1,138

    Scrolls can pump quit a bit of liquid. I just...

    Scrolls can pump quit a bit of liquid. I just got done flooding a Tecumseh scroll for 2 weeks on purpose. We tried to kill it, but it survived.
  7. The condenser is a mix of liquid and saturated...

    The condenser is a mix of liquid and saturated vapor as well. Please explain how subcooling can exist at the outlet of the condenser.
  8. Replies
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    836

    I got a pocket temperature chart that has that...

    I got a pocket temperature chart that has that info on it. It's a Sporlan chart. They give them away free at the parts house.
  9. Replies
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    Thanks a lot man. I really appreciate that.

    Thanks a lot man. I really appreciate that.

    I'll look those over. This web site is great.
  10. Replies
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    2,178

    Thanks. We're getting there. Like I said, I...

    Thanks. We're getting there. Like I said, I can't even get in the house to check these things for myself. I'm just trying to get on overview of the possibilities so I'll know what to look for.
  11. Replies
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    2,178

    That's the kind of explanation I need-Tell me more

    WYOUNGER--

    Thanks a lot. Everything I read covers mainly how the system works with electric heat. That seems pretty simple.

    REGARDING THE GAS FURNACE SYSTEM ONLY. My next question is about...
  12. Replies
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    2,178

    I don't know the model. I am mainly just...

    I don't know the model. I am mainly just interested in the normal sequence of events.

    The frost doesn't concern me. It was raining and cold that day. The thing only looks at the defrost...
  13. Replies
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    I'm sorry, I should have said stated Copeland. I...

    I'm sorry, I should have said stated Copeland. I have been working with Copeland equipment for so long I guess I just assume everybody else does too.
  14. Replies
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    I think this is the way it works. It's hard to...

    I think this is the way it works. It's hard to say. The homeowner knew nothing. I was concerned because it didn't look like a heat pump thermostat on the wall.

    What about the frost? How much...
  15. Replies
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    I'm a refrigeration guy who has never worked on a...

    I'm a refrigeration guy who has never worked on a residential heat pump. However I am closing on a house that has an air to air heat pump with a gas furnace back up. Can anyone tell me if the...
  16. Replies
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    49,928

    Pressure drop can fool you.

    Overcharge can cause an evaporator to flood.

    Excessive pressure (r22) drop in the suction line could cause that flooded refrigerant to fall below freezing before it reaches the dome of the...
  17. Replies
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    6,114

    It is good and dependable. It's also a major...

    It is good and dependable. It's also a major time saver. Some people are just so used to brazing, that they don't know how to use it correctly.

    You just fill the cup and get off. You can't...
  18. Replies
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    6,114

    That's exactly what I was talking about. ...

    That's exactly what I was talking about. Manufacturers recommend the best solutions. That keeps your warrenty valid if you follow their recommendations. There are many OEM's that recommend...
  19. Replies
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    I heard that. I was hoping to avoid that...

    I heard that. I was hoping to avoid that situation. I called the application engineer from Copeland and he said that there is a seal that could be bad and they ususally recommend replacing the head.
  20. Replies
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    6,114

    You are not helping people if you make those...

    You are not helping people if you make those broad statements. There are refrigeration applications that demand lower soldering temperatures.

    The original question I responded to was asking which...
  21. Replies
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    I know a lot of reasons where 15% should not be used on refrigeration lines.

    Hey Oilman52


    I B COOL has a very popular opinion. I personally would never make such a broad statement, because I don't know everything about every refrigeration system and every application....
  22. Replies
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    Originally posted by hotgastruass [B] ...

    [QUOTE]Originally posted by hotgastruass
    [B]

    That's not cool. We all run into confusing problems. His problem may not be as basic as you might think. He is familiar with a refrgeration system...
  23. Replies
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    49,928

    TXV's are supposed to control superheat, but they...

    TXV's are supposed to control superheat, but they don't do a good job when there is an overcharge, dirt, or broken fans. I see TXV's flooding compressors all of the time.

    A lot of times it is due...
  24. Replies
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    I would take it, but I can't make it to South...

    I would take it, but I can't make it to South Jersey any time soon. Man you shold be able to get rid of that.

    I hear that small airports use a lot of those refrigerants. Apparently those plane...
  25. Replies
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    Maybe he should try a different set of gauges? I...

    Maybe he should try a different set of gauges? I know that a faulty manifold gauge or a bad gasket has had me scratching my head a time or 2.
  26. Replies
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    If you use a good temperature termination Klixon,...

    If you use a good temperature termination Klixon, located on the coldest return bend of the evaporator, the defrost will only last until the coil is clean. If you just set it up for time...
  27. Replies
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    95/5 and Staybrite 8 are both soft solders. Of...

    95/5 and Staybrite 8 are both soft solders. Of the two soft solders, Staybrite is stronger and better for filling loose fittings.

    Brazing is stronger than both. Staybrite is not stronger than...
  28. Replies
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    There is not enough information on many of these...

    There is not enough information on many of these posts for anybody to really be right or wrong.

    Any technician could be overlooking the most obvious mechanical or electrical condition, because...
  29. Replies
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    Staybrite 8 is stronger and better.

    Staybrite 8 is stronger and better.
  30. Replies
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    Pour it in the pipe until it is full, then dump...

    Pour it in the pipe until it is full, then dump it into a bucket and weight it. You'll have to do this in a very cold room.
  31. Thread: Unloader

    by rdhussmann
    Replies
    4
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    881

    Pressure controls work too. I worked on one...

    Pressure controls work too. I worked on one yesterday where the Honeywell control controlled Liquid line solenoid only. Once the compressor was started, pressure controls controlled unloading.
    ...
  32. Replies
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    Van Steenburgh makes an excellent recovery...

    Van Steenburgh makes an excellent recovery machine. Buy one that cools the refrigwerant before it discharges into the bottle. This saves a ton of time recovering refrigerant. They are not cheap,...
  33. Replies
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    Some do and some don't. Some coolers count on...

    Some do and some don't. Some coolers count on their compressor off time for defrosting the coil. It depends on how cold they are running their coil temperature and the differential setting on the...
  34. Replies
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    Sometimes display cases have antisweat heaters...

    Sometimes display cases have antisweat heaters and lighting that is not supposed to be energized until the case is pulled down, especially antisweat heat. I would recommend turning oof all of the...
  35. Thread: Unloader

    by rdhussmann
    Replies
    4
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    881

    I think you should look at the wiring diagram. ...

    I think you should look at the wiring diagram. The coil is energized when it is time to unload. Sometimes the unloader solenoid will be wired in series with other controls to insure that the...
  36. Replies
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    Will that cause any damage to the valve plate. ...

    Will that cause any damage to the valve plate. This is an old compressor. I haven't pulled the head off of it yet. I was waiting to to get some information before I go up an pull the head.
    ...
  37. Replies
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    oil return

    Trax oil is the only way to go on scrolls.
  38. Replies
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    1,936

    Stage one is usually designed to run by itself...

    Stage one is usually designed to run by itself during low load conditions, so it could be advantageous to make sure the unloaders, expansion valves, fans, and hot gas bypass systems are running...
  39. Replies
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    2,184

    Hot gas should be used last. Because of the...

    Hot gas should be used last.

    Because of the decreased volume of the suction vapor returning to the compressor from the system and available for cooling, the operating range for unloaded...
  40. Replies
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    If the system is overcharged it can flood back to...

    If the system is overcharged it can flood back to the compressor. If an additional problem exists, like a dirty filter or a bad fan motor, the saturated evaporator temperature could be below the...
  41. Replies
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    1,472

    The solenoid coil is energized. The solenoid is...

    The solenoid coil is energized. The solenoid is working correctly. In fact the solenoid and the coil have even replaced, but the compressor will not unload.

    Has anyone heard of the internal...
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