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Type: Posts; User: coolinman

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  1. You can't have hot gas and liquid in the line...

    You can't have hot gas and liquid in the line together. If it was saturated meaning there is no subcooling, vapor and liquid would be in the line at the condensing temperature. Low charge would drop...
  2. I agree with Ikapigian Subcooling is the only way...

    I agree with Ikapigian Subcooling is the only way !
  3. Replies
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    F.Y.I. An electronic sight glass is a perfect...

    F.Y.I.
    An electronic sight glass is a perfect tool to verify this problem
  4. Replies
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    2,710

    With these pressures I would expect more of a...

    With these pressures I would expect more of a temperature drop across the coil. Aside from that it clearly looks like (is) a flow problem. You said that there was a negligible temperature drop across...
  5. Thread: Join RSES?

    by coolinman
    Replies
    8
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    1,118

    Your company name speaks for itself.

    Your company name speaks for itself.
  6. Thread: Join RSES?

    by coolinman
    Replies
    8
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    1,118

    What is your Career worth to you. If you are...

    What is your Career worth to you.
    If you are looking at dollars and cent's. We'll hell you don't need anything. Take your cash and enjoy. R.S.E.S. is the largest Educational Organization in our...
  7. Your the one to tell us what you get. You seem to...

    Your the one to tell us what you get. You seem to have a handle on this.
    You don't beleve what the equipitment ratings are.

    Now Do you understand Power Factor as it applies to what your paying...
  8. Thread: Jug of R22

    by coolinman
    Replies
    3
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    1,230

    I have a green valve (one way) tank. Dupont R-12...

    I have a green valve (one way) tank. Dupont R-12 with a (gross) weight of around 34 Lbs. 28-29 lbs Virgin R-12. I paid around 20.00 a Lb when I Purchasted it. I would be happy with 20.00 a Lb to a...
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    1,873

    The reason I asked about Superheat is if the...

    The reason I asked about Superheat is if the valve is overfeeding the Subcooling will be low and to increase it you would be overcharging the system. You just can't use one condition when charging a...
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    The easy way to check is with the outdoor unit...

    The easy way to check is with the outdoor unit not running check for current flow on the high voltage supplying the unit. This is not fool proof there may be a thermostat to turn it off when not need...
  11. Replies
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    1,873

    Is this a water to air heat pump. What is the...

    Is this a water to air heat pump. What is the noise you hear. Is it in the refrigerant lines. Also no mention of Superheat reading.
  12. Replies
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    1,822

    I would check to see if there is a crankcase...

    I would check to see if there is a crankcase heater and if its working. The refrigerant should also be checked. Sounds like what is called flooded starting. If there is a long line set there may need...
  13. Throw a sightglass and pressure tap in the liquid...

    Throw a sightglass and pressure tap in the liquid line by the condensing unit. The liquid (3/8") service valve is giving low side pressure in heating so you can't tell liquid pressure. I use a...
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    2,954

    Never seen that before. I would think there has...

    Never seen that before. I would think there has to be an abnormal amount of virbration to shake these parts apart. I don't believe the complete weld would break popping off the power assembly.
    Just...
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    kefah The reason your having problems with the...

    kefah

    The reason your having problems with the new R-410A systems is due to the characteristics of the refrigerant and the outdoor temperatures your experiencing. R-410A is not designed for air...
  16. Replies
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    1,467

    Did anyone bother to check all the operating...

    Did anyone bother to check all the operating conditions of the system or is this all an assumption as to what’s happening. Being this is a new unit you should have all the manufactures literature and...
  17. Replies
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    5,940

    Are you trying to say you are cooling some inside...

    Are you trying to say you are cooling some inside rooms at the plant that reach 60-70C when It's 51C outdoor. Or your trying to cool inside when it reaches 60-70C outside.
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    I absolutely agree with allen38 on matching...

    I absolutely agree with allen38 on matching amperage and not horsepower when replacing fractional horsepower motors. N.E.M.A. standards allow a range of current flow in horsepower ratings where a...
  19. Replies
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    2,177

    Have you checked for voltage imbalance on your 3...

    Have you checked for voltage imbalance on your 3 phase 480. I would also look for poor connections. For years I took care of a facility - 7 buildings 2500 tons of air mainly 10 ton split's mostly 480...
  20. Replies
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    2,835

    I've had condenser leaks develop at the factory...

    I've had condenser leaks develop at the factory braze connections on the header and never got a refrigerant allowance. Got new coil but no refrigerant. Complained but did no good.
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    533

    Your lucky its not 60 or it could be raining up...

    Your lucky its not 60 or it could be raining up there. Do they leave the windows open also ????????
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    533

    Tell me this is a JOKE.

    Tell me this is a JOKE.
  23. Hey RegalPF Earning a BS in Mechanical...

    Hey RegalPF
    Earning a BS in Mechanical Engineering mentioned by FL.HVAC is the cats meow and would open many doors. With a Mechanical Engineering degree you would need the school time and also you...
  24. Replies
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    1,772

    Remember to always check your superheat and...

    Remember to always check your superheat and subcooling. You need to be sure you don't have liquid refrigerant coming back to the compressor so make sure you have superheat in the return gas line to...
  25. Thread: Sad!

    by coolinman
    Replies
    5
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    2,077

    I've never had a problem with driers. I think...

    I've never had a problem with driers. I think this for me has contributed to low callback issues and system reliability. I don't think liquid driers should be placed in series nor the wrong size be...
  26. Replies
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    1,772

    Remember STICKINIT !!!!!!!! What we do as...

    Remember STICKINIT !!!!!!!! What we do as professionals is to move heat Ė donít matter if we move heat into the structure or out of the structure. To remove heat in our industry we circulate a...
  27. Has anyone checked pressures Low and High side...

    Has anyone checked pressures Low and High side Accurate Temperatures of the refrigerant Line's (both) outside without being influenced by the ambient (insulated bead probe) or did your guy just braze...
  28. When the compressor shuts off the suction rises...

    When the compressor shuts off the suction rises and the valve reacts like the superheat is dropping and will close off. If you have a non-bleed valve and the needle and seat mate properly it prevents...
  29. Replies
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    Did you ever check the HIGH side pressure while...

    Did you ever check the HIGH side pressure while it was running. There may have been a restriction or a TXV power assembly loosing charge and you were overcharging it causing the head to climb.
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    You are SICK . I hope you don't dream of this.

    You are SICK . I hope you don't dream of this.
  31. Replies
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    1,327

    Steve the problem is that 410a operates at a...

    Steve the problem is that 410a operates at a totally different pressure and the R-22 compressor would not be able to work at this pressure even if you could clean out all the old mineral oil and...
  32. Replies
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    1,327

    Forget it. !!!!!!!! R-410a will never work in...

    Forget it. !!!!!!!!

    R-410a will never work in a R-22 condensing unit. You have this mixed up with the old R-12 Retrofits.

    It would be like Putting R-22 in a R-12 condensing unit for the same...
  33. Replies
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    3,137

    You may want to check for voltage or current...

    You may want to check for voltage or current unbalance at the compressor. Are all three poles of the contactor clean with no voltage drop. No burned connections in the electrical circuit - Breakers /...
  34. Replies
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    Contactor stuck closed. You would think the fan...

    Contactor stuck closed. You would think the fan relay would open with the stat and keep it from over cooling unless the fan is in on position.

    By the way if the unit can cool the house to 42...
  35. Thread: 230v on 24v

    by coolinman
    Replies
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    3,502

    Looks to me like that wire was added to the...

    Looks to me like that wire was added to the electrical - its a different shade of black and I can't see where it belongs. I had a 480volt 3 phase unit that some nut moved a high voltage wire to the...
  36. Replies
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    Could you send the link again. I viewed it but...

    Could you send the link again. I viewed it but can't bring it up again. I thought it was great and wanted to share it. Or if you have any details to find it it would be great.
  37. Replies
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    Daytona State College. Daytona Beach...

    Daytona State College. Daytona Beach (386)506-3000 or 506-4100
  38. Replies
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    I would think 150psi to be low on the indoor coil...

    I would think 150psi to be low on the indoor coil of a heat pump.
  39. Replies
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    bengalitiger7 It get's a little ruff around...

    bengalitiger7
    It get's a little ruff around here. I think your terminology originally was confusing. I know I was. Just wondering if it was an evaporator leak. If so there could have been a lot of...
  40. Thread: bad comp?

    by coolinman
    Replies
    10
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    806

    If the system is pulling into a vacuum compressor...

    If the system is pulling into a vacuum compressor is probably good . You need to find out why your not reading a higher head pressure especally if your using R-22. Make sure your gauge is open to the...
  41. What's your suction pressure. I would think...

    What's your suction pressure. I would think around 0-5 psig would be good.You don't want the suction frosting up to the compressor. It will constantly sweat and make a mess back there. Remember the...
  42. Replies
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    80% by weight or 100% of volume should get you...

    80% by weight or 100% of volume should get you real close.MP 39 at o psig gives you about a -21 average coil just about the same as R 12. Your head pressure should be a little higher than R 12 mabey...
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