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  1. Replies
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    2,383

    I have also replaced a lot of high pressure...

    I have also replaced a lot of high pressure switches. I get a lot of rub outs going from the controls to the safeties. Had a short in the economizer, due to the access panel pinching the wires. Some...
  2. Thread: Leak Lock

    by B1978
    Replies
    25
    Views
    5,117

    I have used RectorSeal for the past year without...

    I have used RectorSeal for the past year without a single issue. Think I may try nylog now.
  3. Replies
    6
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    584

    Thats what im trying to tell them. They cool an...

    Thats what im trying to tell them. They cool an important product, but they dont understand the icepacks maintain a constant temp.
  4. Replies
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    584

    I did that, but they want a tighter reading. I...

    I did that, but they want a tighter reading. I just dont want the compressor cycling every 3 minutes.
  5. Replies
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    584

    Jewett Under counter

    I have a Jewitt Thermo Scientific under counter refrigerator. What is the minimum temperature differential setpoint I can use?
    I have the temp set a 3C, with a 3C deadband. I timed it, and it was 6...
  6. Replies
    58
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    4,537

    I have had pretty good luck with Carrier units,...

    I have had pretty good luck with Carrier units, as well as their knock off Tempstar. Im negative on York, and Trane.
  7. Replies
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    579

    check the charge, set the bypass to factory specs.

    check the charge, set the bypass to factory specs.
  8. Replies
    5
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    1,911

    Trane is terrible... I like the Carrier ones the...

    Trane is terrible... I like the Carrier ones the best. I am installing a McQuay 2 ton, I only need it to cool, is this a mistake?
  9. Replies
    51
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    7,545

    I ran into this situation. Another contractor had...

    I ran into this situation. Another contractor had the factory approve the huge slab coils from 22 to 410A. I went higher up and had it looked at and they said no. I quoted it the right way and lost...
  10. Replies
    14
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    1,641

    I always read the start up check list on...

    I always read the start up check list on equipment im unsure of. It can save you time and money.
  11. Replies
    14
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    1,676

    In the hotter areas, you only get a few years out...

    In the hotter areas, you only get a few years out of them, then toss them. Its not worth re-coating them. We cut them into pieces.
  12. Replies
    93
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    12,734

    Things i see in commercial are Dirty coils...

    Things i see in commercial are

    Dirty coils
    Restrictions
    airflow
    txv issues
    cold return air, supply mixing with the return.
    poor ducting design

    Rarely is it ever a leak, unless its a...
  13. Thread: Carrier 48TJD005

    by B1978
    Replies
    10
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    1,112

    You can do a txv conversion or replace the header.

    You can do a txv conversion or replace the header.
  14. Replies
    16
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    2,482

    Maybe its the wrong LP switch for the...

    Maybe its the wrong LP switch for the refrigerant? 407c?
  15. Thread: Trane

    by B1978
    Replies
    18
    Views
    2,002

    Trane what to say. The compressors they put in...

    Trane what to say. The compressors they put in there are junk. I changed 2 today in an RTU, the next unit over needs 2, thats probably Tuesday. And we had an Intellipak do the same thing this week,...
  16. Replies
    33
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    4,708

    So I need around 20 psi. I adjusted my regulator...

    So I need around 20 psi. I adjusted my regulator to around 23 to see if it holds. I'm losing water though. Im concerned about that. I added water twice, valving off the regulator. I think my...
  17. Replies
    16
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    2,482

    Has someone bypassed the low pressure cutout to...

    Has someone bypassed the low pressure cutout to remove the pumpdown? Or is the LP switch bad? Wait, where is it reading LP from? is it on a port someone back seated so its not reading? Those are the...
  18. Replies
    33
    Views
    4,708

    My regulator says 25, my pumps running around 25,...

    My regulator says 25, my pumps running around 25, when you open the regulator to the system its just keeps climbing, 35+. I still need to find out the design pressure.
  19. Replies
    33
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    4,708

    I need to replace the regulator, or adjust it, it...

    I need to replace the regulator, or adjust it, it lets in to much water.
    My air separator is high on the piping before the inlet of my single pump.
    That B&G from the above link is real similar to...
  20. Replies
    73
    Views
    6,878

    can you see all the distributor inlet ports to...

    can you see all the distributor inlet ports to the coil, are they all the same temp? none are frosted? I think you either have some clogged orifices, or, are you recirculating air? supply to return?...
  21. I have installed 20+ Honeywell 6000's with 0...

    I have installed 20+ Honeywell 6000's with 0 failures.
  22. Replies
    73
    Views
    6,878

    I see up to 100 psi low sides when its crazy hot...

    I see up to 100 psi low sides when its crazy hot inside. Did you get it fixed?
  23. Replies
    33
    Views
    4,708

    I have a Constant Volume Chilled Water System....

    I have a Constant Volume Chilled Water System.
    250ton chiller, 1 pump, 6 air handlers, 2 buildings. A lot of VAV's, hydronic reheats. Thousand fire dampers, and
    Ducted returns, VAV's, controls....
  24. Replies
    33
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    4,708

    yes 3 way valves, piped on the outlet of the...

    yes 3 way valves, piped on the outlet of the coil, I may have to verify they are piped correctly. I will stop by there soon.
  25. An oil lugged evaporator? Maybe he has oil in the...

    An oil lugged evaporator? Maybe he has oil in the evap?
    Its possible that condenser and coil do not match tonnage wise? say a 38k evap and a 60k compressor?

    piping is sized correctly? oversized...
  26. Replies
    33
    Views
    4,708

    Think about the valves on the AHU's, one air...

    Think about the valves on the AHU's, one air handler is shut down, the water bypasses the coil. Winter time, they have a heating coil as well. The pump needs a vfd to react to changing load...
  27. Replies
    33
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    4,708

    Excellent questions, I found one circuit on the...

    Excellent questions, I found one circuit on the chiller down, I got it working 100% now, so we are 100% capacity again. The main system piping goes from the building, to the air separator, and...
  28. Replies
    33
    Views
    4,708

    RTAC 250 Trane. The setpoints 350 gpms, but it...

    RTAC 250 Trane. The setpoints 350 gpms, but it has not run more than 290 while I have been there. I can get it to 350gpm.
    I do have an air separator, but didnt have access to shut down the pump to...
  29. Replies
    33
    Views
    4,708

    10% outside air, 100 ambient. I purged the coils....

    10% outside air, 100 ambient. I purged the coils. I'm getting a water in/out today at the coils. I need to really inspect all the fire dampers, especially return, since it feels like its starving and...
  30. seems like airflow to me, what was the temp split...

    seems like airflow to me, what was the temp split across the coil?
  31. Thread: Frozen Lines

    by B1978
    Replies
    6
    Views
    1,029

    recover and change the powerhead of the txv, also...

    recover and change the powerhead of the txv, also replace the drier. If thats a heat pump, verify you dont have a restriction at a check valve.
  32. Replies
    33
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    4,708

    Chilled water, Air Handlers, warm supply

    I have an account with A Chiller, 42F water, and a half dozen air handlers. 250ton system in all.
    My issue, high supply air temperatures?
    62-65F return 74-78F
    chilled water 42 out, 50 in....
  33. Replies
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    2,470

    If the coils rated for 410A and you install a...

    If the coils rated for 410A and you install a txv, dont worry about the oil, unless its contaminated. It has nothing to do with being a Pro. If the customer has the money, you could do the airhandler...
  34. I think its a charge or restriction issue.

    I think its a charge or restriction issue.
  35. Replies
    73
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    6,878

    63psig suction? with a 83 degree return? Hmn did...

    63psig suction? with a 83 degree return? Hmn did I read that wrong?
  36. Replies
    14
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    4,203

    Good question, I will grab a model number next...

    Good question, I will grab a model number next time. We quoted to replace all of them, its sad because they have cost ABB drives etc in those rooms.
  37. Replies
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    2,193

    I would say no.

    I would say no.
  38. Replies
    14
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    4,203

    I have never quoted a Carrier. We have an account...

    I have never quoted a Carrier. We have an account with about 12 and all 12 are not working.
  39. Waterfurnace INTL....

    Waterfurnace INTL.
    http://www.cee1.org/resrc/specs/ac_tiers/mhpwp135.htm
  40. Replies
    32
    Views
    4,511

    Its overcharged. I would check the specs on on...

    Its overcharged. I would check the specs on on 407C to verify the correct charge amount. I cleaned the coils on an Intellipak, they looked clean, and had the same issue, to again go back with foaming...
  41. Nice advertising!

    Nice advertising!
  42. Thread: No air flow.

    by B1978
    Replies
    4
    Views
    1,458

    compressor replaced several times lol! Poor...

    compressor replaced several times lol! Poor homeowner
  43. Replies
    4
    Views
    1,705

    It will get expensive when they lock up. No...

    It will get expensive when they lock up. No grease is bad, switching between Graphite (black) and better quality lithium, and synthetic also helps kill them.
    Once that shaft gets ruined, you are in...
  44. Replies
    10
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    2,840

    I just saw 140+F entering condenser air today! 2...

    I just saw 140+F entering condenser air today! 2 of 4 operating condensers in a parking structure, 110 ambient. 140 entering 135+ liquid line, 410A near 600psig high side, awesome!!! If I hangout...
  45. Replies
    5
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    1,841

    Are those short radius or long radius elbows?...

    Are those short radius or long radius elbows? Nice clean lineset and job
  46. Thread: TRANE scrolls

    by B1978
    Replies
    13
    Views
    2,272

    I dont prefer Trane compressors. Thats the nice...

    I dont prefer Trane compressors. Thats the nice way to say it. There could be more to this, acid, burnouts, txv, etc.
  47. Replies
    34
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    4,294

    Once POE oil gets saturated, you wont get below a...

    Once POE oil gets saturated, you wont get below a certain value, say 700. The Drier should remove the remaining moisture. Also, the micron gauge can be maintained and cleaned. Changed the oil in your...
  48. Replies
    66
    Views
    12,533

    you can work on those with a lift! lol

    you can work on those with a lift! lol
  49. Thread: York YPAL

    by B1978
    Replies
    2
    Views
    634

    type in the M/N to a search, I believe the manual...

    type in the M/N to a search, I believe the manual will pop up. It works for me all the time.
  50. Replies
    2
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    801

    My feeling is your charge, or is the unit...

    My feeling is your charge, or is the unit re-circulating its own air, 55F return. The charge is critical on a DMS. I weigh it in exact. Read the manual, and do the math on length and ounces per foot....
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