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Type: Posts; User: BillLodato

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  1. Yes but ...................................

    Yes but ...................................

    I already have an airflow measuring station in the outside air intake that appears to be in a suitable location (i.e. straight duct).

    If the minimum...
  2. Thread: Little help

    by BillLodato
    Replies
    1
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    829

    I like magnetic actuators - High resolution, low...

    I like magnetic actuators - High resolution, low hysteresis, compact, fast response, etc., etc.

    I do not know if JCI markets a magnetic actuator - I suggest you contact them.

    What is the...
  3. Replies
    3
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    1,368

    Here's the manual...

    Here's the manual
    62.29.172.250/Continuum/BACnet/i2_b3865_866_instr_EN.pdf
  4. An so ................

    I think i will stay with my original concept .........
    Control the spill/return dampers to maintain a constant return plenum static.

    It will be a few months before we get to do any testing, but I...
  5. Replies
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    1,459

    Is it possible that this is not a control problem

    But rather a refrigeration system problem ???

    Is there Hot Gas Bypass ??
    Are the systems charged correctly ??
    Are the TXV and other refrigeration components set-up correctly ??
  6. Building/System description

    Good Discussion . Thanks all for the thoughtful responses !!!!!!!!!!!!!!!!

    This is a five story building (Plus basement and penthouse Mechanical rooms)

    Each of the floors 2 5 is about 2/3...
  7. Thanks emccontrols, but .................

    Each Supply VAV Zone (Except the Corridors) have a corresponding Return VAV box that tracks the Zone Supply VAV CFM. So ...... Supply/Return Volume tracking is done at the zone level. (Note that...
  8. Thanks for the insight ................

    I thought about controlling the return to mixed plenum pressure, but was concerned about the minimum outside air flow control loop and return damper control fighting each other.

    I thought if we...
  9. Replies
    8
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    4,083

    It really does not matter ...............

    At these pressures, the water is incompressible and their is no significant lag in sensing differential pressure changes.

    It does not matter where the sensors are located as long as the setpoint...
  10. Control Sketch ........

    attached
  11. How about ................

    Thanks for the response ...................

    I may have tried to post tooooooo quickly this morning ,, I took some time to elaborate on the sketch.

    Since the individual zones are providing zone...
  12. Sketch .......... Thanks !!!!!!!!

    Feel a bit silly about posting to Walgreens, but the best i could think of quickly.
    ...
  13. Stump the Control Experts - Application Challenge

    Got a bit of a head scratcher application for a retrospective commissioning project.

    The challenges are:


    - Return Fan Volume Control
    Economizer Damper Control
  14. Replies
    8
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    1,454

    Yes there was a default Password

    But I forget what is was.

    The integrator could disable the default password, rendering it unusable. This was standard practice among most integrators.

    The fact that you client was given a...
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