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  1. I have a well worn schematic that says it is a...

    I have a well worn schematic that says it is a start relay. HAs 2 huge start and 2 huge run caps running through it. Actually 11 wires. Just wondering if there is a way to rig a replacement? Don't...
  2. 50 year old Friedrich condensor still running ..BUT need start relay

    This unit was on my present home way before I got here, been babying it along, compressor running strong, but fan motor recently bit dust. Rigged up a replacement but start relay is sparking and...
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    Not sure what you are talking about itaint,...

    Not sure what you are talking about itaint, wasn't talking about operations, except mine was reading wrong, just was wondering what Testo does to recalibrate and considering what the button on the...
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    467

    Factory calibrating a testo 550

    Anyone know what is involved when you send in a testo to be calibrated? It cost less than $20 so it cant be much. Mine was acting weird the other day but I flushed with nitrogen and seems to be ok. I...
  5. It had a load as the unit was off quite a while...

    It had a load as the unit was off quite a while and it has cap tubes and 1/4" LL, R422D
  6. anyones Testo ever read WRONG - can we trust electronics????

    I have a Testo 550 that I have really enjoyed, until today.
    Working on a 422D system that I was concerned may have been overcharged. Ambient 94, suction 80, discharge 360, SH like 9 etc. so I...
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    3,730

    . I'm actually thinking about getting metal evac...

    . I'm actually thinking about getting metal evac hoses.[/QUOTE]

    Please post a pic of this setup. Like you use short copper lines? What kind of fittings? I think hoses cause a lot of my vacuum...
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    21
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    3,805

    Blu Vac any better?

    Just wondering how you like the new gauge. I have brought back my YJ 69080 twice now as it gets stuck quite often like 3/4 scale. Clean it with alcohol and SEEMS to work for a while but I don't trust...
  9. Replies
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    I have used it with great success. Took a long...

    I have used it with great success. Took a long time to try it, but finally a while back used it first on my own home where I had a slow (add a little every year, under ground lines..30 + year old...
  10. testo 550=zero out pressure sensors before every measurement.

    Do you guys "zero out your pressure sensors before every
    measurement" as the manual says. I don't see the purpose. The hoses just stay pressurised all the time. Lot of, I feel , unnecessary work,...
  11. Replies
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    3,083

    compressor is running, was wondering what design...

    compressor is running, was wondering what design low pressure should be, can see a fourth tube that is stubbed off, sorry, not thinking cause I do have a pressure chart so.... 0 degrees for freezer...
  12. Replies
    8
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    3,083

    r12 refrigerator pressures

    Hey guys , new here, usually in residential tech area.... I have an older refrigerator that is not cooling. Why are there 3 tubes coming off the compressor, 2 to the condensor and the third to the...
  13. Replies
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    4,221

    I just slip a beach umbrella over a 1/2" rebar...

    I just slip a beach umbrella over a 1/2" rebar rod drove into the ground
  14. Replies
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    1,694

    Mine entered into service as a lowly nasal bulb...

    Mine entered into service as a lowly nasal bulb syringe.
  15. Replies
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    1,070

    Since you changed the TXV, I assume you changed...

    Since you changed the TXV, I assume you changed the lld, but I wonder if the old refrigerant was contaminated, thus creating a ll blockage? Dirty condenser coil creates high head.
  16. Replies
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    1,835

    ok, you are making my day Weeb!!!, its one thing...

    ok, you are making my day Weeb!!!, its one thing to go through the procedure, but to know WHY and WHAT is really happening.. some here want to give a man a fish, you are teaching me to fish, thanks
  17. Replies
    17
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    1,835

    Now that is the kind of explanation I have been...

    Now that is the kind of explanation I have been seeking. Thanks very much for taking time to explain!
  18. Replies
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    1,835

    Thanks weeb, great idea, was cooler in house on...

    Thanks weeb, great idea, was cooler in house on freeze day and will check indoor fan and orfice. I suspected I may have overcharged to get SH up.
  19. Replies
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    1,835

    Thanks HVAC, am still thinking about all that...

    Thanks HVAC, am still thinking about all that (not dryer but orfice) and Newold, will check the fan more thoroughly. Great ideas.
  20. Replies
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    1,835

    Should have stated that when I saw the unit...

    Should have stated that when I saw the unit frozen, I cut it off for the day, measurements were all taken next day when I cut unit back on for a while, then cleaned coil. System is not matched,...
  21. Replies
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    1,835

    knew I would miss posting something, clean evap...

    knew I would miss posting something, clean evap and filter, good airflow, no leaks in duct (furred down supply) or return, dr pepper in refrigerator, shower rod in bathroom... oops got carried away...
  22. Replies
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    1,835

    why did this unit freeze up

    Appreciate some help here , first here is the info, I've been here long enough to know you guys want a lot of data:15 year old , r-22 ,1 1/2 ton rheem split,orfice, low side pressure 68, SH 5.6, T1...
  23. Replies
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    1,522

    Probably not your problem, but in my case the...

    Probably not your problem, but in my case the return air chase had a huge ( probably 5% of area) gap where it had been sucking attic air for who knows how long, but finally kicked high limit switch...
  24. Replies
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    1,522

    Well, there are at least 4 causes, just found...

    Well, there are at least 4 causes, just found today, leaking return air.
  25. I just check for a voltage drop across terminals,...

    I just check for a voltage drop across terminals, 1 volt or more,change.
  26. Replies
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    821

    Thanks, I had finally figured it out, I put the...

    Thanks, I had finally figured it out, I put the pump on the oil discharge port (stood the unit upright) and pulled the measured amount of oil in to the suction side of the unit.
  27. Replies
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    821

    old RRU30 oil change

    How do you guys (if you can remember that far back) change the oil in the old blue RRTI RRU30 recovery unit? There is only the 3/8 oil drain to fill through, kinda small for any funnel I have....
  28. I have one and it does fine. Bought it brand new...

    I have one and it does fine. Bought it brand new long ago .(filet mignon is..well if all you ever tasted was hotdogs...) I am a residental builder that does some ac because I like it.
  29. Replies
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    852

    blue recovery unit oil replacement??

    I have an old RRTI RRU30 recovery unit that I need to change the oil in. It says use 3GS compressor oil. Can't find it. What kind of oil you guys use?
    Thanks
    Greg
  30. Replies
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    846

    liquid line filter/driers size

    What cubic inch filter driers are you guys using for 1 1/2 to 4 ton units that use a 3/8 sweat connection, 8 cu in or 16 or ?? I am going to buy some bulk off of Ebay ( 1/2 price of in store)
  31. Replies
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    1,788

    re-made testo hook

    I had to have a hanger so I just made one, took about 15 minutes. I just got an eyebolt, welded a bigger head on the end and ground it round and rebent the ends. This one won't break. If you don't...
  32. Replies
    14
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    1,788

    testo hook broke

    Anyone know a fix for the flimsy aluminum hook on the back of the Testo550? I love the gauges but the hook sucks. Broke off at the ball. Need to hang my gauges.
  33. Replies
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    Dsprice, are you talking about this...

    Dsprice, are you talking about this http://www.ebay.com/itm/Dwyer-Model-2003-MAGNEHELIC-Differential-Pressure-Gage-Gauge-Measures-Water-/140750504179?pt=LH_DefaultDomain_0&hash=item20c56240f3
  34. Thread: H10 Help

    by thecarpenter
    Replies
    3
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    629

    Ebay battery

    http://www.ebay.com/itm/290696774887?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
    $11 with shipping on Ebay
  35. Replies
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    6,775

    Thanks

    Thanks to all you guys that took the time to post your setups! Mine is just like JTCHVAC, except I need to put a blank off valve on the pump. I do however wonder about the tightness of all the CRT's...
  36. Just wondering if you are serious, I don't really...

    Just wondering if you are serious, I don't really see anything wrong with the condensate, I just thought we always had to tie it in to existing plumbing.
  37. Replies
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    Yes, thanks Ga-HVAC for taking the time for your...

    Yes, thanks Ga-HVAC for taking the time for your post and tips.
    Greg
  38. Replies
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    View Post

    <<Will it perform a leak detection while it's also recharging?

    with the right charger, yes.>>

    uh, I just checked with a meter and the battery is disconnected from the unit when the unit is...
  39. Replies
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    583

    I know one doesn't want the smells... but how to...

    I know one doesn't want the smells... but how to get air back to the unit, remember, 3 rooms are only connected by closed doors through unconditioned space and the first bath is not connected at all?
  40. Replies
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    583

    returns in bathrooms??

    I know one doesn't usually put a return in a bath, but....I have 3 bathrooms (only toilets and lavatories) and one office in a large workshop with a common west exterior wall. The bathrooms are all...
  41. Replies
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    3,167

    h10G leak detector

    Hoping more people in another thread would advise about their favorite electronic leak detectors, but....., am looking at a hardly used Bacharach H10G, Mars 25303 on Ebay. have H10's changed much...
  42. Replies
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    3,603

    leak detector recommendation

    Was hoping there would be more responces from more people. I am in the market for one also (have an old CPS 780 that says, yeh there is some loose freon, but cannot narrow down location, are there...
  43. Replies
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    Could you explain the science behind this? I...

    Could you explain the science behind this? I guess I never thought the refrigerant was in a liquid state in the condensor coil when the unit was off. So if moisture is present, corresponding temp...
  44. "the 3 second moisture test " , what is this?...

    "the 3 second moisture test " , what is this?
    Thanks
    Greg
  45. Replies
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    2,224

    testing for non-condensables

    Can someone explain this "comparison between the liquid refrigerant pressure and corresponding saturation temperature at ambient conditions " can show if non-condensables or foreign gases are...
  46. Replies
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    1,890

    I have been wondering along the same lines. I use...

    I have been wondering along the same lines. I use a filter/drier when recovering R22, can I reuse it if I run it back through a filter/drier into the unit. Would it catch all the moisture/trash or...
  47. Yes a kindle or tablet or laptop, but I am mainly...

    Yes a kindle or tablet or laptop, but I am mainly interested in exactly what parameters people are using, how is your spreadsheet layed out?
    Thanks
    Greg
  48. service call log sheet?? Interested in how you people are keeping records

    I have been trying to put together a log sheet to log all my service calls onto my phone for my records, name, date, location, equipent numbers, ambient temp,SH, SC, T1, T2, Delta T, amps,wet...
  49. ambient and external temperature difference

    Sorry, never mind dumb question. I think I answered it myself. External temperature is the temp measured with the 'external' probe I didn't get. Moderator you could delete this thread if you want.
  50. Sorry, should have stated that, digital UEI...

    Sorry, should have stated that, digital UEI DTH31, without the external probe.
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