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Type: Posts; User: wdshea

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  1. Replies
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    Which model machine do you have? With a remote...

    Which model machine do you have? With a remote condenser you have a HPCV, i wonder if it it could be mitigating a low charge, but with the low charhe you are not accumulating enough heat for harvest....
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    How did your numbers compare to the book? Were...

    How did your numbers compare to the book? Were your pressures higher or lower? Did it take longer to make ice? How was ice formation at harvest? ( even or no?)
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    PS make sure water flow is good, machine is...

    PS make sure water flow is good, machine is clean, condenser is clean, etc.

    You'll also need entering water temp and ambient temp.
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    Did you not read my post? Get a manual, and...

    Did you not read my post?

    Get a manual, and find the section regarding operating parameters after 5 minutes and it'll tell you if its over/under/properly charged.

    You definately should not be...
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    READ THE HOSHI BOOK. It will tell you to check...

    READ THE HOSHI BOOK.

    It will tell you to check pressures after 5 minutes of operation. (To determine charge)

    PS check the hot gas valve, is it opening all the way? Hot gas should be just as hot...
  6. Replies
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    The thermistor tells the board when harvest is...

    The thermistor tells the board when harvest is complete...

    Once the suction line reaches the proper temp.
  7. Replies
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    19,568

    Wait till load is normal before clearing the...

    Wait till load is normal before clearing the glass?
  8. Replies
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    19,568

    If it has a receiver, charge per flooded...

    If it has a receiver, charge per flooded evaporator calculated procedure. Then adjust txv. Then check sight glass assuming cooler is under normal load conditions and adjust charge appropriately?
  9. Replies
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    How do you charge with a receiver (but without a...

    How do you charge with a receiver (but without a HPCV)?
  10. Replies
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    19,568

    When you say if it has a receiver you cant charge...

    When you say if it has a receiver you cant charge by SC, does that also include systems with receivers but DO NOT have a head pressure control?
  11. Replies
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    I would also suggest wrapping some electrical...

    I would also suggest wrapping some electrical tape around the rubber tip on the pen, and even the clear part to secure those pieces together. Ive had both come off before while sticking the pen deep...
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    I put mine in auto and let it warm up for at...

    I put mine in auto and let it warm up for at least two minutes. Then slap it in manual, on small. Adjust with the probe in fresh air (no refrigerant) adjust to between one and two beeps a second.
    ...
  13. Replies
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    I guess the bottom line is if there is a head...

    I guess the bottom line is if there is a head pressure control the charge must be calculated? You cant just charge based on subcooling like any other system?

    If i came to a system and was unsure i...
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    I think black rtv is the best IIRC.

    I think black rtv is the best IIRC.
  15. Replies
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    P.S. alaska, charging a system b/c of low suction...

    P.S. alaska, charging a system b/c of low suction is probably the #1 rookie mistake.

    P.P.S. subcooling goes up with restriction.
  16. Replies
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    Never EVER charge a system without first knowing...

    Never EVER charge a system without first knowing hi/lo pressures, subcooling, and superheat. Doesnt hurt to know other information. Never charge by sight glass.
  17. Replies
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    If you think using an epoxy is the proper fix,...

    If you think using an epoxy is the proper fix, your ignorance does not need stating. Recover the refrigerant and do the repair exactly as stated.

    One more addendum, flow nitrogen through the...
  18. Replies
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    Yes, given the specific pressure and if enough...

    Yes, given the specific pressure and if enough heat is rejected or absorbed.
  19. Replies
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    Are screws/centrifugals pumps or compressors?...

    Are screws/centrifugals pumps or compressors? Based on you definition, a centrifugal would be a pump.
  20. Replies
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    Better performance from a non-regulating txv and...

    Better performance from a non-regulating txv and cpr, or pressure regulating txv and no cpr?
  21. Replies
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    How is a pressure limiting txv different? How...

    How is a pressure limiting txv different? How will tht prevent floodback? If there is a low load condition, my suction pressure will be low, therefore negating the benefit of that feature?
  22. Replies
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    I want to build my own condensing unit for low...

    I want to build my own condensing unit for low temp.

    It would have a HPCV with two fans on the condenser. One would run continuously, and the other would cycle as necessary. Then to the receiver...
  23. Replies
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    Maybe if you were to look at a centrifugal or...

    Maybe if you were to look at a centrifugal or screw compressor on a chiller it would make more sense?
  24. Replies
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    What i had in mind was a CPR in conjunction with...

    What i had in mind was a CPR in conjunction with a sub cooler. Then do y'all believe an accumulator could avoided?
  25. Replies
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    This part i dont understand (im in comm a/c),...

    This part i dont understand (im in comm a/c), wouldnt a low airflow issue with a txv cause the txv to pinch off as much as possible?
  26. Replies
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    Assuming the system was designed correctly, why...

    Assuming the system was designed correctly, why would a system ever floodback?
  27. Replies
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    With that said, why ever have an accumulator if...

    With that said, why ever have an accumulator if you are aware of a floodback issue? I've seen some condensing units with both componenents and wondered why.
  28. Replies
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    Accumulator necessary with CPR?

    If using a crankcase pressure regulator, is it still necessary to use a suction line accumulator? Wouldnt limiting crankcase pressure also prevent floodback?
  29. Replies
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    Problem solved! Internal filter drier was...

    Problem solved!

    Internal filter drier was restricting flow. You know the ones i'm talking about, those POS copper FD's that trane put inside the unit. The mesh had actually come apart and the...
  30. Replies
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    tech rep or salesman...?

    tech rep or salesman...?
  31. Replies
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    I wouldnt hold it against him, he doesn't NEED to...

    I wouldnt hold it against him, he doesn't NEED to know, and is confused.

    Truth is, i didnt even know until earlier today...
  32. Replies
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    If you read the article i posted, it would be...

    If you read the article i posted, it would be more aptly named a "rectified current sensor".
  33. Replies
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    http://www.wardburner.com/flamerectification.html

    http://www.wardburner.com/flamerectification.html
  34. Replies
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    actually, they just gave me a new 3/8" ratchet,...

    actually, they just gave me a new 3/8" ratchet, no questions asked.

    but i did have one question "can i keep the broken ratchet?" ... "no."

    "but it has sentimental value..."
  35. Replies
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    i have two sets of brute II gauges... expensive,...

    i have two sets of brute II gauges... expensive, but i think they're bad ass. one for 410, the other for 22. also, get the ballvalves on the end. i love 'em.

    one tech told me, you should get some...
  36. Replies
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    just bought a klein backpack, haven't used it...

    just bought a klein backpack, haven't used it yet, but looks like it will work very well. i'm gonna use it for diagnostics mainly, and try not to overload...

    i really like the rubber on the...
  37. Replies
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    i don't think it is the fan cycle so much as the...

    i don't think it is the fan cycle so much as the pressure issue. the fan cycle is detecting the liquid pressure (which is too low), and isn't cycling the fan on soon enough, by the time it does, the...
  38. Replies
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    the thing is, i was hoping to save time by...

    the thing is, i was hoping to save time by pumping all the refrigerant into the condenser and essentially do the same thing... there is a cheap copper FD that was in the unit, then another filter...
  39. Thread: capacitor

    by wdshea
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    4,026

    cant you damage a cap by shorting across the...

    cant you damage a cap by shorting across the terminals? thats why i suggest the "voltage test" across the terminals...
  40. Replies
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    you can check your ground by checking continuity...

    you can check your ground by checking continuity between neutral and ground. Ground and neutral are electrically connected (bonded) inside the breaker box. though i don't know if the unit cares about...
  41. Thread: capacitor

    by wdshea
    Replies
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    4,026

    i always just check the mF against the rating......

    i always just check the mF against the rating... you can discharge a cap by setting your meter to VAC and stick it across its terminals.
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    ... first of all, i don't want to sell them...

    ...


    first of all, i don't want to sell them something they don't need, second i want to know why this system is acting the way it is.

    third, i assume you are kidding
  43. Replies
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    if it were air, could i pump down the system, and...

    if it were air, could i pump down the system, and check the pressure against my PT chart? i realize that the LL Schraeder Valve would be blocked by the LL Service valve (when closed), but there is a...
  44. Replies
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    sorry, it had been a long day. the 100 psig was...

    sorry, it had been a long day. the 100 psig was after i bypassed the fan cycle control so the unit would run. the 500/250 was what i was getting, but since the fan cycle control cut in was too high,...
  45. Replies
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    500 psig at discharge, 250 at LLSV

    likely restriction, or is this possible?

    5 ton trane split system, condenser is on the roof. system cools a server room. at 55* ambient, i have ~100psig liquid pressure, close to zero subcooling,...
  46. Replies
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    whats the subcooling? whats the temp. diff across...

    whats the subcooling? whats the temp. diff across the filter drier? whats the temp. diff. across the king valve? if you think there is a restriction there, i would check for refrigeration effect.
    ...
  47. Replies
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    1,861

    that's rather convenient, because i found a leak...

    that's rather convenient, because i found a leak at the fitting from the outlet of the indoor TXV to the distributor.

    what bunged up the check valve? not that i would try to clean it out and put...
  48. Replies
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    How did you deduce that it was the indoor check...

    How did you deduce that it was the indoor check valve?
  49. Replies
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    are there tools used to check the piston and...

    are there tools used to check the piston and bore, or is this simply a visual inspection? if air cooled, how do i check the wrist pin?
  50. Replies
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    also, i've been told to only charge a heat pump...

    also, i've been told to only charge a heat pump in cool mode... is it possible to charge the unit in heat without a charging chart?
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