Search Results - HVAC-Talk: Heating, Air & Refrigeration Discussion

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  1. Replies
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    Minimum C.F.M. for Forced air heat

    I go by the general rule of thumb of
    400 C.F.M. per ton of cooling
    with forced air residential gas heat The motor operates at a lower speed.
    I receive issues over using medium or the low speed....
  2. Permanent Magnetic motro and a ABB Drive

    They have had a tech here already to try to commission the ABB V.F.D. model #ACH 550
    Problem is that it is driving a Baldor Permanent magnet motor
    This drive is very common and reliable, but
    I do...
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    560

    Analog to digital control

    I have a Kele 231 differential pressure transmitter
    that outputs analog signals 0-10V.D.C and 4-20mA
    I use these controllers often.
    I am looking for a small device that inputs 0-10V.D.C and 4-20mA...
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    2,446

    I use to call them pivot or mousetrap relays. If...

    I use to call them pivot or mousetrap relays.
    If I recall that is a relay where the contact arm can be (neutral),where it will not touch neither the right normally open nor the left normally open...
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    370

    Liebert liquid level switches

    I would think this more an H.V.A.C. item, but I got the task because they said it is a controls item.
    There using them in a the condensate pans on HVAC units,as high level switches to shut off the...
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    3,571

    I take that to mean the supply line starts at the...

    I take that to mean the supply line starts at the pumps and the return line ends at the pumps.
    The P.E. is filling me in they are doing this for energy conservation.
    it looks as if they want to run...
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    3,571

    Location of differential pressure sensor

    Have a Kele ,differential pressure transmitter,two acurate gauges are right next to the sensor, outputing an accurate signal
    to three Condenser water pump V.F.D. 's
    The sensor and pumps are...
  8. Veris. Great ,forgot all about them, I wired and...

    Veris. Great ,forgot all about them, I wired and configured a few of their electric meters for a sub metering project.They do have good products.
    This Energy rating is keeping us busy.
    Another...
  9. want To log kWh (pulses) from utility meters

    Our utility meters provide additional kWh consumption by way of a pulse output (dry
    contact relay closure).
    We have both screw terminals and Ethernet ports on the Meter output card .
    I want To...
  10. Replies
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    Florida Heat Pump Info

    FHP not to helpfull even though we have over 20 of these units
    Looking for any technical manuals (PDF. great )
    for Florida Heat Pump model # EM210-4VTC-FBT

    These units were purchased in 2004...
  11. Replies
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    1,028

    Carrier ComfortView algorithm

    I am looking for the Carrier Comfortview PDF. manual that specifically deals with the
    C6400 controller algorithms , their names,description and their programmable parameters.
    I went to the...
  12. Replies
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    575

    Thanks Control Man That was the one.The stat was...

    Thanks Control Man
    That was the one.The stat was set for Milli amps and the valve is 0 -10 Volts D.C.
  13. Replies
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    575

    invensys T-Stat

    Hell:
    I have an Invensys non programable digital wall T-Stat, heating only
    The model # TA 168 -005
    I am looking for literature I need to know how the dip switches are configured.
    I think it is...
  14. Replies
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    11,852

    Pneumatic controls are still around and are not...

    Pneumatic controls are still around and are not fully going out just yet.
    I work in sites where they incorporate Pneumatic controls with digital controls.
    As far as what is better? I think they are...
  15. Replies
    0
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    275

    SIM LXIN 16 Lighting Control

    I have two Simplicity SIMLXIN16 Lighting control panels by Hubbell.
    Unfortunately, the hand held keypad interface is missing. (Och)
    We are manually turning them on and off.
    I gather this is...
  16. Replies
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    3,645

    They are life savers. You have a homeowner who...

    They are life savers.
    You have a homeowner who has an existing T-87 stat (Yo Yo).
    They want an energy saving programmable digital stat.
    The only problem is that they do not have that fifth wire...
  17. Replies
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    380

    Bingo! That's the one.Took a second look at the...

    Bingo! That's the one.Took a second look at the tag
    to see if i had it wrong, but they left out the word "aire"
    I guess they were in a hurry when they were stamping the tags.
    Thank you, will...
  18. Replies
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    380

    Powered Inc. fan coil Units

    No results on the web.
    Looking for a cut sheet for some steam fan coil units made by
    Powered Inc.,Mod #Ced2 -72,that is all we can get off the units. Owner has no paper work . Do not know if that...
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    536

    FX 60 Questions

    I heard two people tell me this.I wanted to clarify that the new FX-60 and 20 JACE's have eliminated the serial tunneling service for BACNET and N-2 devices???
    Second I am not near the software,...
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    It may be time to upgrade to an FX . If you are...

    It may be time to upgrade to an FX .
    If you are connected to some type of server you can re-route N-30 alrms to the server. This way you will have some sort of archive.
    Battery status, CPU...
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    Tridium AX questions

    What distinguishes a Bound label binding from other types of bindings
    What distinguishes a a Bound label widget from other widgets
    If I am connected to a JACE through a station connection Web...
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    That is interesting.It could be a psychological...

    That is interesting.It could be a psychological thing.Not saving much money, but
    prevented the big bad contractor from trying to sell me something I do not need.
    Can you give me a name of the...
  23. Replies
    6
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    Rebuilt N-31 or Facilitators

    Was at a job today with Johnson 5 or 6 N-31's and a Facilitator.
    They are all working.I told the customer rep. that they will have to be eventually upgraded to an FX .The customer was insistent...
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    That is the one, Thank you I can safely guess...

    That is the one, Thank you
    I can safely guess that I can now order this part through my
    Kele Rep?
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    Modus Staic Press. Sensor

    I want to calibrate a Modus Instruments Static pressure sensor
    #03031256 11- 32 V.D.C. In 4-20 ma Out
    Before I make any adjustments I would like to look at literature pertaining to this.
    The...
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