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  1. Replies
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    No kidding, single phasing on disconnects and...

    No kidding, single phasing on disconnects and contactors is something that cannot be overlooked.
  2. Replies
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    Recommendations on a tachometer

    I am looking at purchasing a new tachomete. Any suggestions on a good one would be appreciated.
  3. Replies
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    I have Wrightsoft and I really like it. You...

    I have Wrightsoft and I really like it. You could purchase separate modules. I recommend having J, Draw, and D (duct).

    It has a steep learning curve but once you learn it, it goes very fast. If...
  4. I'd get a new coil that is if Trane still has...

    I'd get a new coil that is if Trane still has R-22 coils. If not, you will have to get a new R-410A system.
  5. Replies
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    First of all, I would clean both coils and...

    First of all, I would clean both coils and replace the filter.

    Have you checked the condition of the contactor? Is the OFM kicking off before the compressor? If so, I would start looking at the...
  6. Replies
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    Check out the rear window on this Jeep

    :patriot:I know it has nothing to do with HVAC but just wanted you to check it out.
  7. Please tell me why you prefer manual reset over...

    Please tell me why you prefer manual reset over auto reset?
  8. Do any of you recommend them to the client?

    Do any of you recommend them to the client?
  9. Read this link: ...

    Read this link: http://hvac-talk.com/vbb/showthread.php?t=158850 as it is a perfect example why my template could come in handy not only in this forum but at your workplaces. The link by markettech...
  10. Good idea, thanks for the suggestions.

    Good idea, thanks for the suggestions.
  11. hi wannafreeze, You may not have understood my...

    hi wannafreeze,

    You may not have understood my point of this sheet. It is not used on every job and especially not for changing a 9w motor. It is truly inpractical and unnecessary for what you...
  12. Check out my template for taking refrigeration readings.

    The attached pdf file is for printing out and having at the jobsite to log all of the pertinent information. I have been working on this for a while and modifying it as I see fit. You are welcome...
  13. Adding high pressure controls to walk-ins

    Many of the walk-in coolers and freezers that I work on do not have a high pressure control, just low pressure control. Do you recommend I add a high pressure control to these units and why? If so,...
  14. Help setting cutin and cutout LPC for a walk-in freezer and walk-in a cooler

    I have a low temp walk-in freezer with R-404A. This unit has a defrost timer that turns off the fans, closes the liquid line solenoid and turns on the electric heater. A room thermostat also closes...
  15. Dirty, That is not the case. One line is hot...

    Dirty,

    That is not the case. One line is hot gas line from the compressor going into the Heatcraft condenser. The other line next to it is the liquid line coming out of the Heatcraft condenser. ...
  16. Yeah, I'd like to know what the subcooling is...

    Yeah, I'd like to know what the subcooling is myself at the txv inlet but there isn't pressure tap there so I have no way of getting it unless I open up the system and install one. Do you always...
  17. The supplier looked up the evap and it is rated...

    The supplier looked up the evap and it is rated at 16,000 btu and the txv is rated at 12,000 for R-404A. I also noticed that the lineset going to the txv is 1/2" with a 3/8" liquid line solenoid in...
  18. The Heatmaster condenser fan motor does indeed...

    The Heatmaster condenser fan motor does indeed have a high pressure control that cylces the fan.
  19. 1) I know I've got the sightglass about 85% full...

    1) I know I've got the sightglass about 85% full but not all the way to the top (clear).
    2) Don't know.
    3) I will call supplier tomorrow.
    5) I have tried adjusting the tev clockwise,...
  20. Might be a bad TXV. It just doesnt respond. At...

    Might be a bad TXV. It just doesnt respond. At the evap, the temp at suction line stays at around 10* and the SST at-20*. I even put a hairdryer on the bulb to heat it up to see if it opens and...
  21. I talked to one of the counter-guys at ARS who...

    I talked to one of the counter-guys at ARS who has been there for 27 years selling this equipment and he doesn't like it at all. He said somebody has been there monkeying around with it trying to...
  22. Are these two condensers piped correctly? Check this out!!!

    I am working on a walk-in freezer that has a Tecumseh condensing unit (Copleand compressor, receiver, small condenser with fan) and right next to it is a larger Heatcraft condenser with a fan. See...
  23. Mainly I am doing residential, new installs. I...

    Mainly I am doing residential, new installs. I would like to compare my new installs with my Manual J and Manual D calculations. I would like to take static pressure readings on both sides of...
  24. Suggestions on Fluke 922 airflow meter?

    I am thinking of getting this. Any suggestions on this meter?
  25. Replies
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    I am also thinking of buying this. How much did...

    I am also thinking of buying this. How much did it cost and where did you buy it? Can anyone tell me about this product?
  26. Replies
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    Great idea!

    Great idea!
  27. Why would you want to put a new engine on a car...

    Why would you want to put a new engine on a car that has 250,000 miles? Chances are that other components will keep failing even though you have a new compressor.

    Just replace that condenser and...
  28. I have a furniture store that I work on that...

    I have a furniture store that I work on that presently has 11 downdraft 11,000 cfm coolers on the roof. The owner as well as myself are tired of the constant upkeep with these coolers such as...
  29. Once you tip it and most of the oil is out, do...

    Once you tip it and most of the oil is out, do you flush it with anything to get the remaining oil out?
  30. I know I will need to do this sooner than later...

    I know I will need to do this sooner than later and just wanted to know the proper methods on changing the oil in a system. Let's say for example that I am changing refrigerants and the oil will go...
  31. primmers, What do you mean that you put R12? ...

    primmers,

    What do you mean that you put R12? Are you saying you could still buy it? Is it legal to still put it in? I wonder how much a jug costs if it is still available?
  32. I wanted to know how many of you do this or if it...

    I wanted to know how many of you do this or if it is a good idea. Say I am installing a new walk-in unit with condenser on roof or maybe I will have a system open for repairs, do any of you ever put...
  33. No thanks, not interested in the bridge just in...

    No thanks, not interested in the bridge just in refrigeration, but how do you change the oil? Do you remove the compressor and tip it over so all the oil drains out of the suction line?
  34. k_fridge, Just curious, are your decisions to...

    k_fridge,

    Just curious, are your decisions to use the retrofit refrigerants you mentioned heavily weighted on the fact that they are compatible with oil in R12? Do you always try to stay away...
  35. Temperature range I am asking about is for low...

    Temperature range I am asking about is for low temp and medium temp.
  36. As I am starting to get more into the...

    As I am starting to get more into the refrigeration side, I see there are some R12 systems out there and only a matter of time before I will work on them. If I open up a system, what refrigerant...
  37. Replies
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    This site is awesome! I learn something everyday.

    This site is awesome! I learn something everyday.
  38. k_fridge, That was a good explanation. I will...

    k_fridge,

    That was a good explanation. I will put defrost timer in series with the thermostat and pumpdown solenoid.

    Presently, the condenser is on the roof with the walk-in about 20' away...
  39. Dice, I understand what you said above that evap...

    Dice,
    I understand what you said above that evap fans turn off and defrost heaters go on while in defrost. I do not have any defrost heaters on this system so do I want to leave fans on?
  40. I have a condenser on the roof and a walk-in...

    I have a condenser on the roof and a walk-in cooler inside the building.

    At the condenser contactor, the defrost timer is wired in series with the high pressure switch and the low pressure...
  41. I have a Heatcraft condenser with R-22 but I...

    I have a Heatcraft condenser with R-22 but I cannot read the Model, Serial, nor the amount of charge. I want to open up the system for some repairs. After I am done repairing the unit I would like...
  42. Please explain the colors on a See-All sight...

    Please explain the colors on a See-All sight glass. This is a new sight glass. The sticker on the side of it has the color green with Dry typed over it and the color yellow with wet typed over it. ...
  43. Ice, but the compressor superheat is not below...

    Ice, but the compressor superheat is not below 20* F. I stated somewhere above that the compressor superheat is 44* F. That said, wouldn't I open the valves?

    Just for my info, is opening the...
  44. Ok, I took the measurements you requested. The...

    Ok, I took the measurements you requested. The superheat on the south evaporator was 12* (35* evap outlet on suction - 23* evap inlet on distributor tube). The superheat on the north evaporator was...
  45. It is a Paragon 8145-20B.

    It is a Paragon 8145-20B.
  46. k_fridge, I am a little lost on this step. Let...

    k_fridge, I am a little lost on this step. Let me see if I understood this correctly. I put my Fluke clamp on one of the distributor tubes (inlet) and my other clamp on the 7/8" suction line...
  47. You are correct about replacing the defrost...

    You are correct about replacing the defrost timer. I even mentioned above that I would replace it. My reasoning for proceeding even further on this topic is because the defrost timer has no bearing...
  48. How do I check evaporator superheat since there...

    How do I check evaporator superheat since there are no pressure ports at the evaps. I know I would put my Fluke clamp on each suction line just past each evap. My question is what suction...
  49. So do you just replace it or do you remove it and...

    So do you just replace it or do you remove it and apply power to it and look to see if it opens?
  50. This box is inside a gas station. They have...

    This box is inside a gas station. They have beers and gatorades in them mostly. I believe it is a 44 degree box. They told me to keep temp around 40 degrees.
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