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  1. Thats for Mitsubishi... But... Might as well put...

    Thats for Mitsubishi... But... Might as well put the 2 troublemakers in a single spot,

    I was trying to recall where I saw your logon before. Were you doing some edgerouter work around 5 years ago...
  2. Thread: MS-TP Biasing

    by Jimmy111
    Replies
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    1,653

    Just to say, We are here on a forum with average...

    Just to say, We are here on a forum with average people who would like to understand what they are doing. Term like "Bias" and the usual definitions of it are only confusing to most people. If it was...
  3. Thread: MS-TP Biasing

    by Jimmy111
    Replies
    41
    Views
    1,653

    Built in to the devices. About the Biasing....

    Built in to the devices.
    About the Biasing. Today the resistors are generally referred to as pull up or pull down resistors. If you are serious on the subject, You will find much more useful info...
  4. There are different versions. And something to...

    There are different versions.
    And something to remember about these. The BacnetIP interface is very slow. It is not a router and has no buffer. So if you are on a larger site with lots of Ethernet...
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    Of course the cold discharge air has High...

    Of course the cold discharge air has High relative humidity. For about 2 seconds until it comes in contact with the warm room air. And the relative humidity drops like a rock. You confuse Relative...
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    Why would it make it the perfect time??

    Why would it make it the perfect time??
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    Whatever you say. Anyhow for the rest,...

    Whatever you say.
    Anyhow for the rest, Workplace tech is bundled with EBO. You have to specifically install it from the Workstation software when you are installing workstation or after you install...
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    "Commissioning" generally is how the owners test...

    "Commissioning" generally is how the owners test the system for proper operation to SOO and that they are getting the equipment and system that they pay for.

    It seems like you are after a point to...
  9. Thread: MS-TP Biasing

    by Jimmy111
    Replies
    41
    Views
    1,653

    For the most part they havent made RS485...

    For the most part they havent made RS485 transceivers that require biasing since the 1990's. They are internally biased. Since about 2000 they are all slew rate limited which helps alot with...
  10. It is under resources. SFC3 is the latest...

    It is under resources. SFC3 is the latest version.

    https://www.siglers.com/bacnet-interface1007296850.html
  11. Thread: MS-TP Biasing

    by Jimmy111
    Replies
    41
    Views
    1,653

    This is a very old video that explains much about...

    This is a very old video that explains much about biasing and terminations in a visual style.
    https://www.youtube.com/watch?v=DovunOxlY1k
  12. They are all that way. After the temps stabilize,...

    They are all that way. After the temps stabilize, all that is necessary is a very small amount of liquid covering the cap tube or txv. However upset the balance and everything turns to gas and no...
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    Its very common to have a single pump. However...

    Its very common to have a single pump. However you need to remember that your process needs valves too and for each process, you need to have a 3way control valve that will divert the flow back to...
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    Today, Schneider uses EBO for this. Its a very...

    Today, Schneider uses EBO for this. Its a very good front end. If you have some extra cash, Buying it is a good idea. It does LON, Bacnet, Andover, Modbus, I/A, Contains workplace tech. You will need...
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    Sparkling!

    This was the best looking Boiler room I ever saw. In a house in Los angeles. I didnt do the install. However I was called in when they couldnt get it to work..

    834626
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    Are you looking for IP based or MSTP?

    Are you looking for IP based or MSTP?
  17. Replies
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    Yes, However we are talking about Humid climates....

    Yes, However we are talking about Humid climates. The Dew-point is 75 - 80F.
    In in really humid places, you can hop in your car, start it up and turn on the ac and suddenly you cant see anymore with...
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    Your error is that your condenser wont run long...

    Your error is that your condenser wont run long enough to keep the evaporator cold. It will cycle on and off. Commercial buildings get past this issue with reheat. Reheat isnt something that you find...
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    Yep. Anyhow, Latent heat has to go first. Then...

    Yep. Anyhow, Latent heat has to go first. Then sensible.
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    Capacity has little to do with evaporator size....

    Capacity has little to do with evaporator size. It has to do with refrigerant flow and the ability to boil the refrigerant off (airflow). However the surface area and fin spacing have everything to...
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    Did you use Baking Soda or any baking soda...

    Did you use Baking Soda or any baking soda containing product such as odor removers or carpet cleaners? It will cause exactly the symptoms you mention.
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    Did some work and lived in Davie. Ductboard is...

    Did some work and lived in Davie. Ductboard is used a lot. Sheetmetal can be hard to find and has a tendency of collecting then dripping condensation. A large percentage of houses are block and for...
  23. Sorry. Snap is Carriers version of EIKON. Yes I...

    Sorry. Snap is Carriers version of EIKON. Yes I use the *2 blocks. I didnt know they wrote a Null thou. Ill check it out. Your first paragraph is about manually nulling a point. It works.
  24. Ive done many of these. However dont even pull a...

    Ive done many of these. However dont even pull a wire until the entire thing is accepted and signed off with a Engineers stamp on it.

    About the post about "pressure is pressure is pressure". ...
  25. I do mostly third party integration programs in...

    I do mostly third party integration programs in I-vu. Never really had any issues. I make good use of the OCL block thou. I dont know if there is much difference between I-vu and WebCTRL.

    But I DO...
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    Electricity is actually cheaper that fuel there....

    Electricity is actually cheaper that fuel there. Also, Many places are banning new fuel burning appliances. But for now when it gets too cold, I just shovel some more coal in the stove.
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    I live in a cold place. It can get to -30F in the...

    I live in a cold place. It can get to -30F in the winter. A non inverter Heatpump will just plain quit making heat around 10F. Usually warmer. When this happens, The energy usage drops like a rock....
  28. I tried the industrial Ethernet cable on a job....

    I tried the industrial Ethernet cable on a job. Very expensive. I also had to pull it all out because you have to use the round industrial Ethernet connectors otherwise is wasent rated at all.
  29. There is actually not much in a VFD. A rectifier,...

    There is actually not much in a VFD. A rectifier, Controller and a IGBT module. Most of it it the heat sink. You cant make that too small or your IGBT's melt...
  30. Can You post the part number of the VAV...

    Can You post the part number of the VAV controller? It makes a big difference. Control programs are not interchangeable.
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    Viconics 8650's do all the above out of the box....

    Viconics 8650's do all the above out of the box. The issue with the customer coming into a cold or warm room is solved using a Standby Occupancy where the Occupied set point is turned down 5 or 6...
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    In General the whole device isnt required to be...

    In General the whole device isnt required to be UL Listed. Most even with the Big guys arent. Some are "UL Recognized" Which isnt the same. Almost all are required to be mounted in a UL 508a...
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    Ive used a lot of these. Especially the T3-TB's....

    Ive used a lot of these. Especially the T3-TB's. They finally got the wireless port working. Not saying they are the Best. The only Issue Ive had with them is the MSTP tree does not show up. Ive...
  34. "Fundamentals of HVAC Control Systems" has a lot...

    "Fundamentals of HVAC Control Systems" has a lot of good info. Pricey thou. ASHRAE published book
  35. I use a lot of ABB drives. All the wiring comes...

    I use a lot of ABB drives. All the wiring comes in and out at the bottom. Power and controls. Not much room to keep the wiring separated by the 2 inch minimum. Ive found using 3/8" flex or 3/8 liquid...
  36. Ive used a lot of the VVT Zone and Zone 2...

    Ive used a lot of the VVT Zone and Zone 2 controllers in standalone mode. They are pretty easy to configure using a Ethernet gateway of your choice and YABE. If a point works or not it really depends...
  37. The Viconics Stats They are 8650's now and 8350's...

    The Viconics Stats They are 8650's now and 8350's if you you have hydronics and valves.They have worked well for me. A lot of the functions you want are already built in. With the new 2.5 firmware...
  38. Im not a stickler on the 2/3rds rule but it has...

    Im not a stickler on the 2/3rds rule but it has to be somewhere way down the duct. I see them all the time in the supply air plenum. I very rarely have any issues with air flow. Usually hot water...
  39. Lets just take your car. Do you think you are...

    Lets just take your car. Do you think you are going to save gas by constantly speeding up and slowing down or maintaining a steady state?
    Air flow is the same thing. You spent tones of energy...
  40. He is trying to say that they can reduce the...

    He is trying to say that they can reduce the pressure and keep the volume at the EOL Box. Of course if you can do that it would be great. You would also be very rich because no one else can break the...
  41. Well good luck with that. Most of my new...

    Well good luck with that. Most of my new customers are new customers because their prior contractor couldnt keep their tenants comfortable. First thing I always do is re-balance the airflow because...
  42. I dont know anything about seimens, However: ...

    I dont know anything about seimens, However:

    ?? Reducing pressure always reduces volume. An inch or 2 or 3 of wc isnt really a lot of pressure to begin with. Most engineers just toss in their own...
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    If you send me your email, I can send you a list...

    If you send me your email, I can send you a list of companies who might sell you a License.
    My email is in my profile.
  44. Thread: dial-a-charge

    by Jimmy111
    Replies
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    20,754

    The test and info that you receive is prepared by...

    The test and info that you receive is prepared by EPA Staffers. Do you think that they have the slightest Idea about what a charging cylinder is? The original act was written in 1975 and when the...
  45. Thread: dial-a-charge

    by Jimmy111
    Replies
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    20,754

    608 is not codified law. It is simply an act....

    608 is not codified law. It is simply an act.
    Take a look at CFR Title 40 Chapter I Subchapter C Part 82 Subpart F Recycling and emissions reduction. This is the actual Law.

    Lots of if's and's...
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    No Blower door test but Prior to the installation...

    No Blower door test but Prior to the installation of a relief damper, It was really tough to open the front door with the makeup air running.
    Usually there are 5 people and 2 dogs. However there are...
  47. Not only that but the places that they are...

    Not only that but the places that they are constantly complaining like the redwoods and the Amazon rainforests arent nearly as old as they would like you to believe.
    The Redwoods are scarcely more...
  48. My family had green houses in Wyoming. About 40...

    My family had green houses in Wyoming. About 40 acres worth. Grew all sorts of stuff.
    We heat them in the winter with wood stoves that can be vented into the greenhouse itself.
    After the seasonal...
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    Yes, When we originally built the house it was to...

    Yes, When we originally built the house it was to have central air. So it was already ducted. So the addition of the Fan coil was not such a big deal. But I was really surprised at how much Outside...
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    Its always half solutions. Get used to it....

    Its always half solutions. Get used to it. Remember, its a agreement with 2 people and an edict with one. No one likes edicts.

    Anyhow. I didnt see any solutions in your post. Just complaints...
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