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  1. Thats definately something i never thought about,...

    Thats definately something i never thought about, makes sense though. I have a 3 1/2 ton unit beside this one i converted it to 410a about a month ago, used old ahu just swapped out the txv, has the...
  2. so you think its running like it should be?i wish...

    so you think its running like it should be?i wish i could walk away from it but i have a feeling its not exactly running right
  3. 62 idwb. 83 oat. by that chart it says my sh...

    62 idwb. 83 oat. by that chart it says my sh should be 10-11 degree range. my suction line temp leaving the evap was 5 degrees cooler then at the condenser. so that puts me closer to 18 degrees...
  4. using both a sman 3 and testo 550 i get the same...

    using both a sman 3 and testo 550 i get the same thing. equalizer is mounted on top of suction. i dont understand what you mean by trapped.
  5. equalizer tube was brazed in, the only time the...

    equalizer tube was brazed in, the only time the superheat is low is at the beginning when the unit is first turned on 3-4 mins in. then it slowly creeps up to 23 degrees where it stops and doesnt...
  6. load in room was only 72degrees

    load in room was only 72degrees
  7. i did sweep with nitrogen while brazing. i...

    i did sweep with nitrogen while brazing. i removed the powerhead and all of the guts too. but it does not sound like its letting refrigerant in when i am by the ahu. i have to put my ear almost on...
  8. started to give it more r22. subcooling climbed...

    started to give it more r22. subcooling climbed to 15,16,17 degrees. indoor wet bulb 62, oat 82. superheat would not fall below 23 degrees.
  9. ok installed 2 piercing valves, after the first...

    ok installed 2 piercing valves, after the first one didnt work. 1-3 psi difference between discharge and leaving unit.
  10. There is a spun copper drier in the outdoor unit,...

    There is a spun copper drier in the outdoor unit, it did not have a temp drop across it at all.
  11. it does sound like a steady, full column. it...

    it does sound like a steady, full column.
    it should be with 14-15 degrees of subcooling right? i just dont understand how my LL temp is equal or less than my ambient temp. a restriction in a...
  12. are there pressure drops inside an evap or...

    are there pressure drops inside an evap or condenser coil. say if i were to measure pressure before the evap and right after? same question for the condenser? sorry if this seems like a dumb...
  13. Replies
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    937

    Not just a carrier thing, all our newer mcquay...

    Not just a carrier thing, all our newer mcquay chillers we are being told the same thing. It's because of what there making the fins from to get the efficiency out of them. No harsh cleaners, we've...
  14. discharge temp is 153.

    discharge temp is 153.
  15. current oat is 84. cond pressure is 192-196. cond...

    current oat is 84. cond pressure is 192-196. cond line temp 85. subcooling 13-14 degrees. suction pressure 60. suct line temp 57. sh is 24.
  16. ok my outdoor air conditions have changed since...

    ok my outdoor air conditions have changed since my readings earlier. so discharge pressure at txv is 174-177. dis line temp at txv is 84-85. subcooling at txv 7-9degrees.
  17. discharge pressure right at the compressor before...

    discharge pressure right at the compressor before it goes into the condenser? i will check my subcooling before the txv now. i had a honda 450r a few years back, sold for a renegade 800 which i sold...
  18. ok update. installed piercing valve before txv,...

    ok update. installed piercing valve before txv, pressure was 158psi. pressure at condenser is 178-182 with an 83 degree line temp and 11.3 degrees of subcooling. now keep in mind a 35-40 foot lift...
  19. I see what you mean. I will post some numbers...

    I see what you mean. I will post some numbers tomorrow, i just picked up a 550 today so i will compare the sman to it. Maybe my numbers will make more sense or look even worse.
  20. Its about a 2 month old sman 3? Why? Ived...

    Its about a 2 month old sman 3? Why? Ived compared the clamp probes with my clamp probe that i use for my meter. They were all very close within a few tenths of each other.
  21. Cant say i agree, installed a payne heat pump...

    Cant say i agree, installed a payne heat pump today with the same conditions as the other day, 68-70 oat and 70 indoor, had no prob maintaining 10 degrees of sh and sc. Now below 60 outside i will...
  22. It is originally what i thought was bad giving me...

    It is originally what i thought was bad giving me 1-2 degrees of superheat. And since i had to pull the evap to get access to the check valve i just decided to change the txv and totally remove the...
  23. I did not check the indoor wet bulb. I will start...

    I did not check the indoor wet bulb. I will start to make a habit of doing so even on txv systems. What will that tell me on a txv system, what my evap load is? The valve i removed was a check...
  24. The temp at the outlet of the evap was 44-46...

    The temp at the outlet of the evap was 44-46 degrees. Roughly 8 degrees cooler then at the outdoor unit. I believe according to my subcooling chart im dialed in pretty close
  25. It definately is cooling well

    It definately is cooling well
  26. I will install a piercing valve before the txv,...

    I will install a piercing valve before the txv, and check for a pressure drop. Is any to be expected if there is no restriction but because of the length and lift? How much of a drop would be a good...
  27. What doesnt make sense is why originally before...

    What doesnt make sense is why originally before the txv change i had 1-2 degrees superheat and now i have 23?
  28. This txv is not adjustable, and even if it was...

    This txv is not adjustable, and even if it was where its located its definately not easily accessible. I have tried moving the bulb in different locations but nothing changed. I serious doubt its...
  29. there both 024s so if im reading the model...

    there both 024s so if im reading the model numbers right which i should be there both 2 tons
  30. 68-70 today was the oat

    68-70 today was the oat
  31. haha :). i get paid by the hour so ill put it in...

    haha :). i get paid by the hour so ill put it in as a vapor no prob. ill definatley keep you updated. have a good weekend sir. also no to answer your question i did not think to add a oil trap, where...
  32. ok on monday ill continue to add and hopefully...

    ok on monday ill continue to add and hopefully itll continue to come down. ill report back once i do. thanks for your help so far
  33. i weighed in the factory charge of 5lbs 2 oz, i...

    i weighed in the factory charge of 5lbs 2 oz, i did not factor in the extra 45 feet of line set cuz i figured i could get it close with sh/sc. i stopped keeping track at 6lbs 2 ozs. if i had to...
  34. i have around a 45 degree line temp at the outlet...

    i have around a 45 degree line temp at the outlet of the evap. so thats puts me at around 17 degrees of superheat. i did trace out the line set and found that theres about 15 feet that runs through...
  35. i will check the line temp on the outlet of the...

    i will check the line temp on the outlet of the evap and compare the 2. as far as the subcooling chart for the condenser i am basically right on the money with my discharge pressure given my...
  36. i can however do that if needed so i can check...

    i can however do that if needed so i can check the superheat at the evap outlet
  37. taking the sh at the outlet of the evap would...

    taking the sh at the outlet of the evap would require me to pump down the unit to install a service port, there isnt one on the evap currently. the sc reading i gave is at the outlet of the...
  38. at the service valve on the condenser

    at the service valve on the condenser
  39. high superheat with normal subcooling on trane straight cool

    hello to everyone here, im new here and was hoping for a little insight on a few issues I'm having with some trane straight cool split systems. Ive got a trane twe024p130b0 ahu with a trane...
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