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Forum: AOP Commercial HVAC

FOR EQUIPMENT OWNERS ONLY Questions and discussions regarding Commercial Buildings

  1. Sticky Thread Sticky Threads

  2. Sticky Thread >>READ THIS FIRST<< NO DIY? Why NOT??

    Started by Dad, 10-31-2011 07:41 PM
    • Replies: 0
    • Views: 39,971
    Dad
    10-31-2011, 07:41 PM Go to last post

  1. Normal Thread Normal Threads

  2. Need Insight on HVAC Installation and Additional Charges

    Started by Alex3344, 08-13-2023 08:31 PM
    • Replies: 1
    • Views: 16,399
    rundawg
    08-13-2023, 08:38 PM Go to last post

  3. Swapping R290 compressor to R404a compressor

    Started by hyundae, 08-11-2023 09:14 PM
    compressor cross reference
    • Replies: 17
    • Views: 17,886
    BBeerme
    08-13-2023, 12:19 PM Go to last post

  4. Daikin VRF first gen known problems?

    Started by facilitiesD, 08-04-2023 04:11 PM
    • Replies: 6
    • Views: 16,219
    facilitiesD
    08-08-2023, 04:49 PM Go to last post

  5. Small Nightclub | HVAC system cannot maintain cooling

    Started by niteclub, 07-24-2023 03:23 PM
    2 Attachment(s)
    • Replies: 13
    • Views: 16,485
    dan sw fl
    08-08-2023, 07:02 AM Go to last post

  6. Are HVAC contractors in too high of a demand to answer questions?

    Started by SamSch, 07-24-2023 04:06 PM
    2 Pages •
    1 2
    • Replies: 33
    • Views: 16,976
    HVAC_Marc
    08-07-2023, 05:44 PM Go to last post

  7. Advice on air filters for 7.5 ton Carrier RTU - Commercial Kitchen

    Started by mprva, 07-30-2023 07:03 PM
    • Replies: 3
    • Views: 14,749
    dan sw fl
    08-06-2023, 04:09 PM Go to last post

  8. Swap Stage 1 and stage 2?

    Started by atljim965, 07-03-2023 05:54 PM
    • Replies: 7
    • Views: 15,151
    atljim965
    07-31-2023, 10:27 AM Go to last post

  9. Split system outdoor unit

    Started by smossavat, 07-25-2023 01:37 PM
    • Replies: 8
    • Views: 14,373
    dougfamous
    07-29-2023, 06:55 AM Go to last post

  10. 39 ton McQuay air cooled condenser

    Started by anon_dragon235, 07-26-2023 08:11 PM
    • Replies: 5
    • Views: 14,229
    pecmsg
    07-27-2023, 06:33 PM Go to last post

  11. Outdoor Unit temporary buzzing after storm outage

    Started by thepenguintux, 07-24-2023 09:42 AM
    • Replies: 2
    • Views: 13,601
    pecmsg
    07-24-2023, 11:29 AM Go to last post

  12. R22 condenser, 407C freon, 410a coil

    Started by Garner, 07-23-2023 05:05 PM
    • Replies: 3
    • Views: 12,944
    pecmsg
    07-24-2023, 08:12 AM Go to last post

  13. HVAC load calculation for new metal building

    Started by legdoc, 06-19-2023 11:49 AM
    1 Attachment(s)
    • Replies: 9
    • Views: 14,019
    legdoc
    07-17-2023, 07:11 AM Go to last post

  14. CARRIER RB30 Compressor replacement.

    Started by sarvar91, 07-14-2023 04:38 AM
    carrier chiller
    • Replies: 1
    • Views: 12,411
    ehsx
    07-14-2023, 09:01 AM Go to last post

  15. Used Lennox LCH150s4bg5y Prodigy Control System completely blank!

    Started by lechegaray, 06-10-2023 03:33 PM
    • Replies: 1
    • Views: 11,767
    lechegaray
    06-10-2023, 03:45 PM Go to last post

  16. Question Can I swap my Indoor Remote Temperature Sensor for a Thermostat?

    Started by Dev_in_Bay_Area, 05-24-2023 06:36 PM
    • Replies: 7
    • Views: 11,781
    dougfamous
    06-10-2023, 07:30 AM Go to last post

  17. Unit Heater Above Cold Kitchen

    Started by S_Kelly, 06-02-2023 11:18 AM
    • Replies: 7
    • Views: 10,841
    VTP99
    06-06-2023, 06:30 PM Go to last post

  18. I live in a country where we can't get gas

    Started by yachtwork, 05-30-2023 12:35 AM
    • Replies: 13
    • Views: 10,400
    Juan Madera
    05-30-2023, 05:09 PM Go to last post

  19. Trane fan blowing slow TERRIBLE-NOT COOLING Please HELP

    Started by Alpha1234, 05-26-2023 02:51 PM
    trane commercial
    • Replies: 2
    • Views: 9,063
    pecmsg
    05-26-2023, 07:00 PM Go to last post

  20. 2 ton RTU...optins?

    Started by tpa-fl, 05-18-2023 12:17 AM
    • Replies: 3
    • Views: 7,454
    aa7483
    05-23-2023, 06:22 PM Go to last post

  21. Low Temperature Thermostat Capillary Length

    Started by u1stafterme, 05-08-2023 07:59 AM
    • Replies: 4
    • Views: 6,940
    pecmsg
    05-08-2023, 08:21 AM Go to last post

  22. Walk-in cooler, 2 issus: 1) high humidity 2) compressor overheating in warm weather

    Started by milkdemcows, 04-16-2023 05:28 PM
    2 Pages •
    1 2
    1 Attachment(s)
    • Replies: 39
    • Views: 8,258
    pecmsg
    05-03-2023, 05:35 PM Go to last post

  23. Odd Vibration Noise

    Started by DaveSchlarb, 05-03-2023 11:15 AM
    • Replies: 1
    • Views: 3,373
    ehsx
    05-03-2023, 11:33 AM Go to last post

  24. Cooling tower VFD's

    Started by johndb52, 04-27-2023 01:10 PM
    • Replies: 2
    • Views: 3,293
    ehsx
    04-27-2023, 09:30 PM Go to last post

  25. Fan coil units - 19 ft. ceilings

    Started by S_Kelly, 04-21-2023 03:14 PM
    • Replies: 6
    • Views: 4,230
    dan sw fl
    04-25-2023, 03:04 PM Go to last post

  26. Discharge liquid drier AND TXV drier on Lennox 5 Ton Gas Package. Remove discharge?

    Started by ttowngremlin, 04-17-2023 06:35 AM
    2 Attachment(s)
    • Replies: 16
    • Views: 3,362
    VTP99
    04-17-2023, 10:39 PM Go to last post

  27. LANCO Fan Coil Specs

    Started by belfayachao, 04-17-2023 05:17 PM
    2 Attachment(s)
    • Replies: 3
    • Views: 3,582
    belfayachao
    04-17-2023, 05:56 PM Go to last post

  28. Bathroom Exhaust Fan

    Started by S_Kelly, 04-12-2023 04:59 PM
    • Replies: 3
    • Views: 2,238
    billygoat22
    04-12-2023, 09:13 PM Go to last post

  29. Westinghouse ID

    Started by belfayachao, 04-06-2023 04:57 PM
    1 Attachment(s)
    • Replies: 10
    • Views: 2,161
    slctech
    04-10-2023, 12:57 PM Go to last post

  30. WF NDW 100 Freezeout issues

    Started by Often Befuddled, 04-07-2023 01:40 AM
    freeze alarm, waterfurnace
    • Replies: 0
    • Views: 1,780
    Often Befuddled
    04-07-2023, 01:40 AM Go to last post

  31. ASTM Condensing water expansion tank

    Started by Joe Joe, 04-05-2023 12:10 PM
    • Replies: 8
    • Views: 1,878
    pecmsg
    04-06-2023, 07:07 PM Go to last post

  32. Help Needed Acquiring Trane/Carrier Documents!!!!!

    Started by knightmare1984, 04-04-2023 03:24 AM
    carrier, centrifugal, chiller, rooftop unit, ton, trane 1 Attachment(s)
    • Replies: 2
    • Views: 2,163
    VTP99
    04-04-2023, 04:58 AM Go to last post

  33. Hobart Crs66a issues with overload sensor

    Started by Chefmike87, 03-31-2023 07:13 PM
    • Replies: 9
    • Views: 2,330
    VTP99
    04-01-2023, 01:34 PM Go to last post

  34. HVAC professionals Opinion for head pressure controls

    Started by svardekar, 03-25-2023 10:34 AM
    • Replies: 6
    • Views: 1,644
    svardekar
    03-25-2023, 12:32 PM Go to last post

  35. New Commercial Steam Boiler for 100 year old building

    Started by Upkeeper, 03-14-2023 10:34 PM
    • Replies: 8
    • Views: 1,999
    heatingman
    03-24-2023, 11:19 PM Go to last post

  36. Carrier Chiller, Low Suction Superheat, headache!!! EXV VALVE??

    Started by crised, 01-07-2009 10:54 AM
    3 Pages •
    1 2 3
    • Replies: 40
    • Views: 34,545
    Murre
    03-16-2023, 04:22 PM Go to last post

  37. GE Zonline PTAC

    Started by jeryray, 03-05-2023 11:18 PM
    • Replies: 3
    • Views: 1,338
    BaldLoonie
    03-06-2023, 12:26 PM Go to last post

  38. Microtech 3 controller not communicating with combustion board

    Started by Tmcniel10, 03-03-2023 03:35 PM
    • Replies: 0
    • Views: 1,431
    Tmcniel10
    03-03-2023, 03:35 PM Go to last post

  39. Zoning - RTU vs VRF

    Started by RC1992, 03-01-2023 06:32 PM
    • Replies: 3
    • Views: 1,480
    pecmsg
    03-02-2023, 04:39 PM Go to last post

  40. Evapco Sleeve bearing oil type

    Started by dmarzullo, 02-27-2023 10:08 AM
    chiller, evapco, tower
    • Replies: 5
    • Views: 1,537
    dmarzullo
    03-01-2023, 10:07 AM Go to last post

  41. McQuay Screw Compressor

    Started by Arsrahman, 02-28-2023 02:00 AM
    1 Attachment(s)
    • Replies: 1
    • Views: 1,462
    ehsx
    02-28-2023, 07:32 AM Go to last post
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