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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: 39,972
    Dad
    10-31-2011, 07:41 PM Go to last post

  1. Normal Thread Normal Threads

  2. RTU - HVAC ON / OFF

    Started by Homer0922, 02-25-2023 08:49 AM
    • Replies: 5
    • Views: 1,349
    timebuilder
    02-26-2023, 05:45 AM Go to last post

  3. Is "fan on" mode mandatory for a major Senior Living facility ?

    Started by KevimK2, 12-26-2022 03:46 PM
    • Replies: 13
    • Views: 2,116
    KevimK2
    02-24-2023, 04:13 PM Go to last post

  4. Is this a reasonable request from a GC?

    Started by calettso, 02-04-2023 01:33 PM
    2 Pages •
    1 2
    2 Attachment(s)
    • Replies: 22
    • Views: 2,557
    hvac n-j-near
    02-24-2023, 03:25 PM Go to last post

  5. Confused Server room: 24-ton system to cool 3 tons of heat load?!

    Started by binba, 02-21-2023 10:02 PM
    computer room cooling, data center, server farm
    • Replies: 6
    • Views: 1,718
    pecmsg
    02-23-2023, 06:52 PM Go to last post

  6. Carrier 30RA (Europeean) <-- CCN control (pro dialog plus)

    Started by Nitin, 02-14-2023 10:12 AM
    carrier chiller
    • Replies: 5
    • Views: 1,632
    Nitin
    02-15-2023, 07:34 AM Go to last post

  7. Question Interesting WSHP issue

    Started by geridzs, 02-12-2023 02:20 PM
    • Replies: 0
    • Views: 1,217
    geridzs
    02-12-2023, 02:20 PM Go to last post

  8. Carrier Alarm Codes A140

    Started by sblauv, 02-11-2023 08:03 AM
    • Replies: 3
    • Views: 1,385
    pecmsg
    02-11-2023, 09:10 AM Go to last post

  9. Carel PCO - application display problem

    Started by eyesoore, 02-07-2023 04:21 PM
    • Replies: 1
    • Views: 1,826
    eyesoore
    02-08-2023, 05:54 AM Go to last post

  10. Small HVAC Should Have A Non-Plenum Returns only?

    Started by calettso, 11-11-2021 06:50 PM
    • Replies: 16
    • Views: 3,556
    VTP99
    02-04-2023, 02:46 PM Go to last post

  11. Fujitsu RVNUM with multiple outside units

    Started by Frank_k, 01-29-2023 01:44 PM
    • Replies: 3
    • Views: 1,259
    joemach
    01-29-2023, 04:46 PM Go to last post

  12. Electric Reheat for Heat Pumps

    Started by S_Kelly, 01-24-2023 07:01 PM
    • Replies: 5
    • Views: 1,941
    ss120396
    01-26-2023, 09:32 AM Go to last post

  13. Carrier MBB RCB and CXB card program

    Started by solractc79, 01-26-2023 08:03 AM
    • Replies: 1
    • Views: 1,284
    pecmsg
    01-26-2023, 08:45 AM Go to last post

  14. Commercial contractor -Spartenbergs South Carolina

    Started by RMG, 01-11-2023 07:32 PM
    • Replies: 6
    • Views: 1,306
    vstech
    01-25-2023, 01:36 PM Go to last post

  15. HVAC engaging burner, but not blower

    Started by meeotch, 11-28-2022 11:14 PM
    blower, controller, hvac 1 Attachment(s)
    • Replies: 3
    • Views: 1,885
    vstech
    01-25-2023, 08:26 AM Go to last post

  16. Passenger Railcar heat

    Started by GLRR, 01-07-2023 02:16 PM
    2 Pages •
    1 2
    1 Attachment(s)
    • Replies: 20
    • Views: 2,732
    Poodle Head Mikey
    01-14-2023, 04:39 PM Go to last post

  17. Split-System vs Packaged Rooftop Units for Commercial Buildings

    Started by WolfmanJake, 11-15-2022 07:42 PM
    commercial hvac, rooftop unit, split system
    • Replies: 18
    • Views: 3,366
    timjimbob
    01-09-2023, 08:07 AM Go to last post

  18. Question Hard-wired auto-off power saving mechanism for Mitsubishi A/C with PAR-33MAA controll

    Started by scwong, 12-31-2022 06:17 AM
    control panel, controller, mitsubishi
    • Replies: 6
    • Views: 1,794
    scwong
    01-04-2023, 02:28 AM Go to last post

  19. What causes a leak at valve cap?

    Started by PlatypusNS, 12-27-2022 07:45 PM
    2 Pages •
    1 2
    • Replies: 25
    • Views: 2,442
    joemach
    12-31-2022, 11:22 PM Go to last post

  20. PTAC Question

    Started by chicken_smell, 10-02-2022 02:04 PM
    • Replies: 14
    • Views: 2,563
    Special-K
    12-07-2022, 06:40 PM Go to last post

  21. Carrier chiller

    Started by Deerhunter2016, 11-28-2022 02:32 PM
    • Replies: 1
    • Views: 1,683
    dan sw fl
    12-02-2022, 06:04 PM Go to last post

  22. Magic Pak Install and Weather Proofing?

    Started by asus389, 11-17-2022 06:12 PM
    installation, louvers, magic pak
    • Replies: 3
    • Views: 1,566
    dougfamous
    11-26-2022, 07:58 AM Go to last post

  23. Room thermostat Siemens rab10.2

    Started by Marques, 11-22-2022 04:48 PM
    • Replies: 2
    • Views: 1,238
    pecmsg
    11-23-2022, 09:15 AM Go to last post

  24. Industrial walk in cooler

    Started by AtticaVice, 11-16-2022 12:30 AM
    • Replies: 3
    • Views: 1,121
    vstech
    11-16-2022, 07:34 AM Go to last post

  25. Repeated tripping on reset box

    Started by NathanCommercia, 11-08-2022 10:15 PM
    1 Attachment(s)
    • Replies: 7
    • Views: 701
    pecmsg
    11-09-2022, 12:30 PM Go to last post

  26. Advice on cooling a very hot 8x40 connex filled with computery stuff

    Started by MRS1Op, 10-30-2022 08:11 PM
    • Replies: 10
    • Views: 1,072
    pecmsg
    11-08-2022, 04:33 PM Go to last post

  27. Carrier RTU Open on 24v?

    Started by Hacrat, 11-03-2022 01:36 PM
    • Replies: 6
    • Views: 1,308
    DFZ
    11-06-2022, 09:11 AM Go to last post

  28. Carrier network service tool

    Started by Mfawzy04, 03-09-2022 01:52 PM
    2 Attachment(s)
    • Replies: 4
    • Views: 2,557
    Mfawzy04
    11-05-2022, 10:30 AM Go to last post

  29. Anyone Help With Trace 700 or a 550,000 sqft Warehouse Cooling Plan

    Started by JustGotAC, 01-29-2019 04:06 PM
    • Replies: 6
    • Views: 1,797
    rundawg
    11-03-2022, 10:30 AM Go to last post

  30. Balancing Temp SP, RH, and Dew Point in Ammonia Refrigeration

    Started by JustGotAC, 03-07-2022 09:05 AM
    • Replies: 2
    • Views: 1,196
    Poodle Head Mikey
    11-02-2022, 01:04 PM Go to last post

  31. Having Trouble getting ACH 550 to enable motor start

    Started by Gblanco, 10-31-2022 10:41 AM
    • Replies: 3
    • Views: 829
    Gblanco
    11-01-2022, 10:59 AM Go to last post

  32. Small Gym: High humidity found in Supply Air

    Started by FitSA, 09-23-2022 03:46 PM
    3 Pages •
    1 2 3
    4 Attachment(s)
    • Replies: 50
    • Views: 3,358
    pecmsg
    10-29-2022, 08:33 AM Go to last post

  33. 6 Unit apartment building boiler issues and recommendations

    Started by Misterfixit72, 10-24-2022 12:30 PM
    3 Attachment(s)
    • Replies: 6
    • Views: 1,480
    ss120396
    10-27-2022, 09:47 AM Go to last post

  34. What does C/N mean on a Rooftop Evap Package 5 Tonne Lennox. Coils leaking

    Started by KINGRIZ, 06-22-2022 04:52 AM
    • Replies: 6
    • Views: 2,038
    Lone Eagle
    10-23-2022, 06:52 PM Go to last post

  35. Crankcase Heater

    Started by emelio67, 10-21-2022 07:46 PM
    • Replies: 8
    • Views: 772
    ehsx
    10-22-2022, 08:49 AM Go to last post

  36. HSCI 1171-83-201A

    Started by kevin5454, 10-20-2022 02:42 PM
    • Replies: 0
    • Views: 650
    kevin5454
    10-20-2022, 02:42 PM Go to last post

  37. Question Datacenter Water Source Heat Pumps (for Electrical room)

    Started by mystica555, 10-17-2022 06:51 PM
    • Replies: 2
    • Views: 681
    mystica555
    10-17-2022, 08:08 PM Go to last post

  38. HVAC strange smell - insulation?

    Started by meeotch, 10-17-2022 06:58 PM
    hvac, insulation, smell
    • Replies: 0
    • Views: 514
    meeotch
    10-17-2022, 06:58 PM Go to last post

  39. 1500 Ton York YK No Liquid Level Control

    Started by DomainDDCP, 10-15-2022 08:52 AM
    • Replies: 1
    • Views: 680
    DomainDDCP
    10-17-2022, 12:14 PM Go to last post

  40. Question Damper Lubrications - Safety of Using Aerosolized Sprays?

    Started by Zippy941, 10-05-2022 08:38 AM
    air handler, dampers, maintenance, safety
    • Replies: 1
    • Views: 874
    Cagey57
    10-05-2022, 02:12 PM Go to last post

  41. Poll Poll: Ducted VS Mini-Split

    Started by WannabeGP, 09-29-2022 04:29 AM
    air conditioner, duct, mini split, new installation, shop
    • Replies: 3
    • Views: 1,136
    WannabeGP
    09-30-2022, 03:18 PM Go to last post
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