Search:

Type: Posts; User: soundbalance

Search: Search took 0.00 seconds.

  1. Replies
    12
    Views
    3,293

    If Reheat is electric and VAV is cooling only,...

    If Reheat is electric and VAV is cooling only, then 70 CFM per KW is typical. Some people use 100 CFM per KW to be safe. Most velocity sensors are accurate down to .03" of velocity pressure, fall...
  2. I realize this would be ideal for the chillers,...

    I realize this would be ideal for the chillers, but I am struggling how to do this with multiple chillers and one tower. We are communicating via bacnet, but there is not a point for CWT set point...
  3. sequence of ops for CWT

    Ok so here is our Sequence:

    Tower leaving water temperature setpoint.

    a.The cooling tower leaving water temperature setpoint resets within the following range:
    (1)The maximum temperature...
  4. Correct Condeser Water Temperature Set Point

    I am currently commissioning a chiller plant w/ 3 McQuay WMC chillers. I am interested in any control statagies used that will optimize the perfomance of the system by changing the condenser water...
  5. Replies
    13
    Views
    3,106

    I am not a controls expert, but I have done...

    I am not a controls expert, but I have done exactly what you are proposing before w/ Trane controls. The Trane VAV card will work stand-alone, but you will need to have a pressure switch referencing...
  6. Turbocor compressors have magnetic bearings....

    Turbocor compressors have magnetic bearings. Rotor shafts and impellers levitate during rotation and float on a magnetic cushion. I am currently working on start-up six tubocor compressors on three...
  7. Replies
    22
    Views
    1,936

    I recently was involved in the replacement of a...

    I recently was involved in the replacement of a 40 hp fan w/ a 75 hp, direct drive, mixed airflow fan. We supplied a VFD for control of the fan w/ a by-pass for back-up. I discovered during start-up...
  8. Replies
    15
    Views
    3,270

    -Towers are normal w/ plastic drip orfices in...

    -Towers are normal w/ plastic drip orfices in bottom of hot water basin.

    -during last fill replacement (which is the 3rd to fail), rep confirmed that fill sheet count was exactly what BAC...
  9. Replies
    15
    Views
    3,270

    I am not sure of all of the firms that have been...

    I am not sure of all of the firms that have been involved. I know that Systems has been and now the owner is dealing directly w/ BAC.
  10. Replies
    12
    Views
    1,523

    I can not wait to break out the "basket hood" in...

    I can not wait to break out the "basket hood" in front of the commisioning agent!
  11. Replies
    16
    Views
    1,451

    Are you sure it is water leaking into the unit...

    Are you sure it is water leaking into the unit and not water flying off of the cooling coil or over the condensate pan? Maybe this is not applicable, but I thought I would throw it out there.
  12. Replies
    24
    Views
    5,637

    Recently did start up on 70 ton Aaon that had bad...

    Recently did start up on 70 ton Aaon that had bad pipe (> 10 pin holes in 1 foot length of pipe). All of the service fitting caps were loose or missing. Garbage!
  13. Replies
    12
    Views
    1,523

    Rotating vane anemometer is a good tool,...

    Rotating vane anemometer is a good tool, relatively cheap compared a flow hood, but requires a bit of intuition. I recommend you spend the extra $$ and buy a flow hood. You can pick one up for ~$800...
  14. Replies
    15
    Views
    3,270

    I spoke with the equipment rep today and learned...

    I spoke with the equipment rep today and learned that he has been involved with this issue for several years and had three seperate independent consulting firms look at this. I am going to meet with...
  15. Replies
    15
    Views
    3,270

    I don't know much about chemicals, but if there...

    I don't know much about chemicals, but if there was high choride concentrations I would think that it would be sensible. There was no odor of spent chlorine during my visit.

    I intend to dig into...
  16. Replies
    15
    Views
    3,270

    Tower is Induced Draft / Crossflow. Fill looked...

    Tower is Induced Draft / Crossflow. Fill looked "beat to death". BAC is currently replacing the fill. I intend to get involved after they are complete. At this point, I think that the logical thing...
  17. Replies
    15
    Views
    3,270

    I can not speak to the chemical treatment, but I...

    I can not speak to the chemical treatment, but I can say that this is a prominent hospital facility with MANY experienced people looking into this issue. I need to ask the question, but I expect that...
  18. Replies
    15
    Views
    3,270

    BAC cooling tower / Fill media breakup

    Customer called me with interesting issue. He has five BAC open loop cooing towers and has replaced the "fill" media four times since they were installed (1999?). The media is comming apart and...
  19. HP in marine environment / dirty sock smell

    A customer of ours has an issue in San Diego with some of their heat pumps. They get a reoccuring musty smell from time to time, usually around transition time from heat to cool. They have tried...
  20. Replies
    1
    Views
    916

    DMS 3500 Operator Interface

    What do I need to interface w/ a DMS 3500 controller. A customer of ours has inherited a Siebe control system w/ a DMS 3500 controller. The contoller enclosure has a display w/ limited feedback. I...
  21. Replies
    8
    Views
    1,352

    Thanks all, We are currently applying for a...

    Thanks all,

    We are currently applying for a variance w/ the city to allow us to work around this code requirement. We have not given up!
  22. Replies
    8
    Views
    1,352

    This project is in Seattle, Washington. Wet side...

    This project is in Seattle, Washington. Wet side economizers are commonly used to satisfy this code requirement. Most of them are disabled by the building operators shortly after turn-over. It is...
  23. Replies
    8
    Views
    1,352

    WSHP wet side economizers

    Have a project that is in the design phase that is going to use water source heat pumps. Code requires 60% of the air to the space have economizer capability. Really do not want to use wet side...
  24. Replies
    16
    Views
    1,974

    Thanks for the info. I like the idea of mounting...

    Thanks for the info. I like the idea of mounting the OA reference 4' above the highest point on the roof. Just not sure how to secure it so it looks like it belongs and does not fly off the roof in a...
  25. Replies
    16
    Views
    1,974

    Building pressure

    Looking for a good way of referencing outdoor static pressure. Historically, we have mounted the "bird feeder" (Dwyer model A-306) on the top of a AC unit on the roof. I understand that this is not...
Results 1 to 25 of 31
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event