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Type: Posts; User: brian9695

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  1. Replies
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    Well this is what I've gathered and what I...

    Well this is what I've gathered and what I believe happened. The return duct going through the wall was too small due some other obsticles that were apparently unmovable. When the balancer went to...
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    1,270

    Have you also checked the calibration or accuracy...

    Have you also checked the calibration or accuracy of the transducer that is giving the board its suction saturation temp it could also be quite a bit off giving you this error. Just a thought.
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    1,343

    It may seem crude but a toilet brush taped to a...

    It may seem crude but a toilet brush taped to a broom stick with some determination has usually worked. If its grease your trying to get off a coil, long nozzles and pressure sprayers full of coil...
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    455

    Is it possable that the board is monitoring the...

    Is it possable that the board is monitoring the temperature of the coils surface to initiate defrost. Necessity vs. Time. Just a thought.
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    Here is where I would start. 1) Verify if it is...

    Here is where I would start.
    1) Verify if it is a low pressure switch turning the compressor off and on. It could also be a klixon thermostat usually located on U bend of evaporator coil to prevent...
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    Orland could you restate the question, I'm a...

    Orland could you restate the question, I'm a little confused as to what your asking. Thank you and sorry for my misunderstanding.
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    1,591

    I think you are on the right path with your...

    I think you are on the right path with your diagnosis. You stated you heard a noise that might be consistent with a contactor or solenoid if I understood you correctly shortly after the noise your...
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    1,281

    Are you sure it's "liquid injection into the...

    Are you sure it's "liquid injection into the suction of the compressor" I've never seen that. Could it be a badly piped hot gas bypass which is very common on chillers for a/c chilled water...
  9. Thread: unloaders

    by brian9695
    Replies
    4
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    986

    I will usually set this style at verying pressure...

    I will usually set this style at verying pressure cut in's but usually leave the cutouts at the coldest I would like the saturation temp to be. Example for an R-22 dx system
    1st unloader : cut in...
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    1,675

    I guess it depends on what you want.......... Do...

    I guess it depends on what you want.......... Do you want to go to the same place everyday and have a comfortable environment in which you are familiar with the equipment you service or do you enjoy...
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    I have never worked on that model, but I do work...

    I have never worked on that model, but I do work on a few different styles of dunham bush air conditioners. Usually a refrigeration system has too be fairly low on charge to cause a compressor...
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    I would leave the TXV at the current position you...

    I would leave the TXV at the current position you have it. Remember a TXV is just a matter of Spring Tension + Back Pressure vs. Bulb Pressure. Its only job is to regulate superheat, and trust me...
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    It seems like you have gotten a lot of good...

    It seems like you have gotten a lot of good advice on this one. If you do go back tommorow to check the charge try this method. Ignore the sight glass. Charge the unit until you have between 10 to...
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    1,437

    Many smaller RTU's (under 30tons) are now using...

    Many smaller RTU's (under 30tons) are now using split conderser coils, I'm sure you know what I'm talking about. Maybe I'm wrong but a RTU low on charge with a conderser that is dirty between coils...
  15. Thread: ???confused

    by brian9695
    Replies
    11
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    1,169

    I agree with those saying rev valve. Although...

    I agree with those saying rev valve. Although this is not the most fun repair in the business. It sounds likely that will be the one that will fix your problem. Just be sure to check for temp gain...
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    928

    If the suction line is steel you can can...

    If the suction line is steel you can can silverbraze using 45 and white brazing flux a copper extended refrigeration fitting of your choice to recharge the car. But beware if the line is aluminum...
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    There is a damper on the O.A already, but what...

    There is a damper on the O.A already, but what your saying makes sense. I was overiding the O.A sensor input to check my D.A. reset and possably the O.A damper started to open when it reached econ...
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    I went to a job to help a fellow tech with some...

    I went to a job to help a fellow tech with some control issues on a constant volume air handler with hw and cw valves, o.a, and return dampers with an exhaust/return fan.
    I was programming the...
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