Search:

Type: Posts; User: Shockwave

Page 1 of 4 1 2 3 4

Search: Search took 0.01 seconds.

  1. Replies
    31
    Views
    2,616

    Yes it is only a cooling tower set up, no...

    Yes it is only a cooling tower set up, no chiller. I would not plan on using the variable set point during the winter months for the reasons you said. In the late spring, early fall and winter...
  2. Replies
    31
    Views
    2,616

    I am implementing wet bulb + approach control for...

    I am implementing wet bulb + approach control for our tours. During the summer months, it would be ideal to drive down the cooling tower temps as low possible since no heat pumps are in heating...
  3. It is used to measure sewerage level of a tank,...

    It is used to measure sewerage level of a tank, it is located between the tank and pumps.
  4. dunno, tried two different PC's and both show the...

    dunno, tried two different PC's and both show the pictures in the thread
  5. What is the middle piece between the flange and transducer?

    Any of you guys know what this piece between the transducer and flange is? Is it a snubber? I have not seen a transducer with this before. This setup is about 20-25yrs old.
    ...
  6. Replies
    13
    Views
    914

    The loops don't really enable each other, they...

    The loops don't really enable each other, they just disable each other...Same thing I guess. Through the simulator i have tried about 50 times playing with the supply air and they never end up...
  7. Replies
    13
    Views
    914

    Thanks, what i ended up doing was taking the...

    Thanks, what i ended up doing was taking the output of each of the AIA's for cooling/heating(I am using Spyders) and running them into a compare block. For now i have it set at 20% with an off...
  8. Replies
    13
    Views
    914

    Control logic for supply air set point?

    How would some of you go about tackling control of a supply air temp with niagara logic?

    The unit is 100% OA and i am going to be using compartive enthalpy when i transfer these over to the new...
  9. Closed Loop cooling tower night set back?

    A question regarding a closed loop cooling tower loop for about 400 water source heat pumps, in which about 95% of them go unoccupied after 6pm. Would there be any savings in raising the supply...
  10. I am using 3.7.106.1 with spyder tool 6.0, no...

    I am using 3.7.106.1 with spyder tool 6.0, no issues
  11. Thanks, I understand about the deficiencies,...

    Thanks, I understand about the deficiencies, and also trial and error. The old school method you mentioned was what the instructor went over very briefly at the training thing i went to at Johnson...
  12. Are there any decent loop tuning courses around that you have been to?

    Looking for a loop tuning course later in the year to go to possibly, preferably 3-4 day one. Have any of you been to one that you recommend or to stay away from?

    Thanks
  13. 3 Way Valve Dual Actuator Setup...Install?

    Hi,

    We only have a few set's of 10" 3 way valves on a few of our loops that I am responsible for. I have never had to install from scratch a new dual actuator setup. What what be the correct...
  14. You can pretty much do same with the Spyder...

    You can pretty much do same with the Spyder pallet as you can with the Niagara stock pallet logic blocks. Some blocks can do multiple things where some of the stock ones in Niagara are geared for...
  15. When i say unoccupied i am talking about the heat...

    When i say unoccupied i am talking about the heat pumps that conditiion the space, the radiation heat was never on a schedule other than enable at 40dF and is completely seperate from the scheduled...
  16. Yes i am only using exterior perimeter offices...

    Yes i am only using exterior perimeter offices for the average, all office are 95% the same size and exterior walls except for the corners. I am using the 1st floor as the basis for everything as...
  17. Thanks, The system is based off OAT reset,...

    Thanks,

    The system is based off OAT reset, but that max supply set point is what i am changing during occ and unocc.

    I am not talking about lower the boiler water temp. Our boiler temp is...
  18. Scheduling OAT reset max supply temps for occupied/unoccupied hours..

    I have come up with a system where during unoccupied hours or weekends that will lower the hot water supply temps to whatever i choose. Instead of let's say having a max 140dF supply temp in a...
  19. Thanks, Yes i am using DDC...

    Thanks,

    Yes i am using DDC controllers/Niagara. This whole project is coming up in a few weeks, everything is being set up now. It was all designed by our in house engineers. The VFD's are not...
  20. Pump Control - Closed loop & VFD Control Strategy?..

    For a closed water loop with a couple pumps/vfd's what would be the ideal control strategy?

    1.
    - try to maintain a certain system pressure?
    - try to maintain a certain differential pressure?
    -...
  21. Replies
    44
    Views
    5,638

    I would still like to get these easy io's up and...

    I would still like to get these easy io's up and going again to add something else to my arsenal. I have about 8 of them sitting here that I never ended up using. I do have a few places I could use...
  22. Replies
    10
    Views
    437

    I was mainly thinking after the flow valves were...

    I was mainly thinking after the flow valves were replaced, but even now, if the branches off the supply line are now restricted with circuit setters, wouldn't the water move faster through the main...
  23. Replies
    10
    Views
    437

    thanks, The discussion came about because I...

    thanks,

    The discussion came about because I would like to swap these 407c units for 410a units that have built in bacnet controls so i can plug them directly into our network. This would...
  24. Replies
    10
    Views
    437

    407c/410a.....Tower water temps..

    Hi,

    We had this discussion today regarding the condenser water temps and the relation to using 410a or 407c when replacing our R22 units(100s of them)

    There has been a tech that has been...
  25. Replies
    10
    Views
    881

    Yes! That was happening a lot. The relay would...

    Yes! That was happening a lot. The relay would close that first time, and then now that i think of it i checked it a few times afterwards during all this mess and i remember it staying closed and...
Results 1 to 25 of 84
Page 1 of 4 1 2 3 4
Comfortech Show Promo Image

Related Forums

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