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Forum: Tech to Tech Chat - Commercial

FOR TECHNICAL CHAT BETWEEN INDUSTRY WORKERS ONLY. NO AOP OR DIY** This forum is for Technical Chat in the Commercial Industry and only within the limits of the Open area Rules concerning DIY. Any technical chat that goes too far will be removed or moved to the Pro Area.

  1. Sticky Thread Sticky Threads

  2. Sticky Thread NO AOP posts here please. ONLY Tech to Tech chatter

    Started by Dad, 08-10-2011 04:34 PM
    • Replies: 0
    • Views: 10,648
    08-10-2011, 04:34 PM Go to last post
  1. Normal Thread Normal Threads

    • Replies: 25
    • Views: 1,270
    11-10-2016, 06:19 AM Go to last post
  2. Internal Bypass TXV?

    Started by 02JeepKing, 05-30-2013 08:44 PM
    • Replies: 4
    • Views: 1,502
    05-30-2013, 09:28 PM Go to last post
  3. Lennox Gurus

    Started by 1-Hvacdoc, 08-20-2011 09:53 AM
    • Replies: 4
    • Views: 3,909
    08-20-2011, 09:58 PM Go to last post
    • Replies: 4
    • Views: 1,777
    05-15-2012, 06:59 PM Go to last post
  4. Chattering gas valve

    Started by 11austinlee, 01-14-2017 08:52 AM
    3 Pages
    1 2 3
    • Replies: 26
    • Views: 1,643
    01-16-2017, 10:53 PM Go to last post
  5. Trane CTI Controls

    Started by 11austinlee, 02-16-2017 02:02 PM
    • Replies: 4
    • Views: 485
    02-16-2017, 04:44 PM Go to last post
  6. Rtu and digicools.

    Started by 11crv, 05-29-2014 08:34 PM
    • Replies: 7
    • Views: 1,242
    05-30-2014, 12:46 PM Go to last post
  7. systems with dual tx valves and check valves

    Started by 12gauge, 07-26-2013 04:07 AM
    • Replies: 2
    • Views: 965
    02-03-2017, 12:16 AM Go to last post
  8. Trane YCD240 gas valve operation

    Started by 1966Chevy2, 10-05-2014 05:28 PM
    • Replies: 8
    • Views: 1,762
    10-07-2014, 10:52 AM Go to last post
  9. DX dehum makeup air units

    Started by 19characterusername, 07-12-2012 10:38 PM
    • Replies: 5
    • Views: 1,668
    07-22-2012, 10:06 PM Go to last post
  10. Trane E Machine Rebuild Info requested

    Started by 1SikLBZ, 08-28-2013 10:25 PM
    • Replies: 4
    • Views: 1,246
    10-01-2013, 11:10 AM Go to last post
  11. Pneumatic Receiver Controller P541

    Started by 1SikLBZ, 01-12-2015 09:24 PM
    • Replies: 3
    • Views: 1,675
    01-13-2015, 05:21 PM Go to last post
  12. Carrier 50AK 50 Ton Unit

    Started by 1SikLBZ, 03-23-2015 09:55 PM
    • Replies: 7
    • Views: 1,588
    03-26-2015, 04:18 PM Go to last post
  13. Hmm Unloaders

    Started by 1tonn, 03-23-2012 08:44 PM
    • Replies: 3
    • Views: 1,648
    03-23-2012, 09:49 PM Go to last post
  14. Nu-Calgon Moisture Removal

    Started by 1tonn, 08-08-2013 11:54 AM
    • Replies: 5
    • Views: 1,384
    08-08-2013, 07:13 PM Go to last post
  15. RTU with ERV

    Started by 24/7mechanical, 10-23-2016 06:04 PM
    2 Pages
    1 2
    • Replies: 21
    • Views: 1,772
    11-26-2016, 04:34 PM Go to last post
    • Replies: 12
    • Views: 2,165
    09-09-2013, 02:15 AM Go to last post
  16. What am I missing?

    Started by 280zx, 07-22-2015 09:06 PM
    4 Pages
    1 2 3 4
    • Replies: 39
    • Views: 8,555
    02-03-2017, 12:48 AM Go to last post
  17. I hate phantom voltage

    Started by 2sac, 12-09-2011 12:36 AM
    2 Pages
    1 2
    • Replies: 17
    • Views: 2,503
    02-05-2017, 11:18 AM Go to last post
  18. Oil in a gas line

    Started by 2sac, 01-05-2012 10:36 PM
    • Replies: 5
    • Views: 1,077
    01-23-2012, 08:52 PM Go to last post
  19. Need a manual and/or schematic for GE

    Started by 2sac, 01-16-2013 07:54 PM
    • Replies: 3
    • Views: 1,182
    01-18-2013, 02:22 AM Go to last post
  20. 3 phase motor testing.

    Started by 2smoke263, 03-15-2017 06:14 PM
    • Replies: 6
    • Views: 601
    03-16-2017, 12:20 PM Go to last post
  21. Confused Weil McLain GV-6 No HSI voltage

    Started by 2story, 09-09-2013 10:10 PM
    • Replies: 0
    • Views: 585
    09-09-2013, 10:10 PM Go to last post
  22. Trane Voyager, intermitant No Heat

    Started by 2wings, 12-31-2013 10:31 AM
    3 Pages
    1 2 3
    • Replies: 27
    • Views: 4,795
    01-03-2014, 05:23 PM Go to last post
  23. how do i tell when my vac pump is going bad?

    Started by 3800tom, 08-29-2011 01:37 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 4,046
    11-19-2011, 01:16 PM Go to last post
  24. Adjust an EPR w/o a pressure tap?

    Started by 3800tom, 09-01-2011 12:13 PM
    • Replies: 10
    • Views: 2,474
    02-25-2013, 10:15 PM Go to last post
  25. GPM for Airflow CCT-30 Glycol System?

    Started by 3gs, 08-14-2014 10:33 AM
    • Replies: 2
    • Views: 906
    08-21-2014, 12:04 PM Go to last post
  26. Lennox 51M42 Tstat not cycling poperly.

    Started by 3rdlaw, 03-17-2015 10:29 PM
    • Replies: 1
    • Views: 565
    03-17-2015, 10:42 PM Go to last post
  27. McQuay water source heat pump

    Started by 461pat, 11-03-2011 08:09 AM
    2 Pages
    1 2
    • Replies: 20
    • Views: 7,352
    03-02-2012, 10:02 PM Go to last post
  28. Mr. Slim Error code "EC" fix????

    Started by 4x4grey88, 09-19-2015 10:41 PM
    • Replies: 4
    • Views: 1,416
    09-20-2015, 08:29 AM Go to last post
  29. Confused Control Head on Variable Speed pumping systems?

    Started by 500GPMdT, 05-28-2013 02:05 PM
    • Replies: 9
    • Views: 2,532
    06-03-2013, 04:06 PM Go to last post
  30. WSHP & fluid cooler education

    Started by 500GPMdT, 07-01-2013 09:04 PM
    • Replies: 1
    • Views: 886
    07-02-2013, 10:23 AM Go to last post
  31. Trane Intellipak EF problem

    Started by 501miller, 03-15-2013 09:00 AM
    • Replies: 9
    • Views: 1,974
    04-02-2013, 12:45 AM Go to last post
  32. Daikin VRV's or Mitsubiski VRD

    Started by 50Panhead, 03-20-2013 04:29 PM
    • Replies: 0
    • Views: 903
    03-20-2013, 04:29 PM Go to last post
  33. 120V Commercial Honeywell thermostat install question

    Started by 520, 06-10-2016 06:23 PM
    • Replies: 3
    • Views: 731
    06-16-2016, 06:41 PM Go to last post
  34. United Refrigeration recovery cylinder problems

    Started by 71CHOPS, 09-19-2016 09:51 AM
    3 Pages
    1 2 3
    • Replies: 29
    • Views: 3,161
    10-12-2016, 09:47 AM Go to last post
  35. older Lennox LCA 240

    Started by 75Porsche, 10-06-2014 04:43 PM
    • Replies: 8
    • Views: 1,801
    10-07-2014, 06:30 PM Go to last post
  36. American standard cast iron boiler

    Started by 77 highboy, 10-17-2016 09:45 AM
    • Replies: 7
    • Views: 763
    10-17-2016, 10:23 PM Go to last post
  37. Sealed or replaceable core?

    Started by 787REFMEC, 02-05-2015 09:10 PM
    • Replies: 10
    • Views: 1,690
    02-08-2015, 08:36 AM Go to last post
  38. mitsubishi mr slim restriction

    Started by 7dayprogramable, 09-28-2012 06:00 PM
    • Replies: 1
    • Views: 1,147
    09-28-2012, 07:42 PM Go to last post
  39. Any experience with this stat?

    Started by 7point62, 06-19-2013 06:04 PM
    • Replies: 2
    • Views: 751
    06-25-2013, 10:16 PM Go to last post
  40. blast chillers

    Started by 85goldwing, 08-16-2011 10:30 PM
    2 Pages
    1 2
    • Replies: 23
    • Views: 3,532
    09-28-2011, 11:40 PM Go to last post
  41. Trane Model YCH060C1L0BE

    Started by 907Controls, 02-20-2013 08:00 PM
    • Replies: 0
    • Views: 951
    02-20-2013, 08:00 PM Go to last post
  42. Ammonia in the air

    Started by 929rc51, 04-13-2014 07:23 PM
    • Replies: 6
    • Views: 1,138
    04-13-2014, 08:33 PM Go to last post
  43. copper to brass

    Started by 9live, 06-23-2016 11:00 PM
    2 Pages
    1 2
    • Replies: 17
    • Views: 1,773
    06-30-2016, 07:47 PM Go to last post
  44. JACE to RTU wiring

    Started by aamtech, 03-10-2014 04:10 PM
    • Replies: 2
    • Views: 903
    03-11-2014, 01:26 PM Go to last post
  45. High side pressure higher than normal...

    Started by aaronkim92, 04-25-2012 12:56 PM
    3 Pages
    1 2 3
    • Replies: 29
    • Views: 5,642
    05-08-2012, 10:55 AM Go to last post
  46. Low Suction Compressor #1 StulZ VHS

    Started by aaronmorgan19, 11-20-2011 12:51 PM
    2 Pages
    1 2
    • Replies: 14
    • Views: 1,613
    11-23-2011, 10:01 AM Go to last post
  47. Melted contactor, Lennox 6 ton rtu

    Started by Aaronn, 07-01-2013 11:33 PM
    2 Pages
    1 2
    • Replies: 13
    • Views: 3,547
    07-04-2013, 08:41 AM Go to last post
  48. low superheat control

    Started by Aaronn, 02-15-2014 12:58 AM
    • Replies: 1
    • Views: 935
    02-15-2014, 08:48 AM Go to last post

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