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    That's awesome!

    That's awesome!
  2. Thanks, but I was looking for fellow technicians...

    Thanks, but I was looking for fellow technicians who have experienced developing something or submitting ideas who might have some insight.
    99% of patents do not make money and probably 99.999% had...
  3. Thread: Sight glass

    by mccann
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    Safety has never been a concern in where I am in...

    Safety has never been a concern in where I am in Arizona. It's a right to fall state.
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    I did 18 years in supermarkets and have now been...

    I did 18 years in supermarkets and have now been in commercial for 6 years.
    I was surprised to find unlike a nice supermarket where they have a store plan on the mechanical room wall with...
  5. When should I call an idea a business and what about selling an idea?

    I recently wrote a provisional patent application and registered an idea. I have several question about developing my idea and selling it.

    Should I start a business if: in my first year I may not...
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    Oversized computer room cooling is getting very...

    Oversized computer room cooling is getting very common. On these smaller Liebert units, open the hot gas bypass some to rase suction pressure to give yourself a longer run time. Hot gas valve...
  7. Zone system on small office building confusion

    How does a zone, Trane Integrated Control System decide which thermostat or sensor is controlling the AC unit to come on or is it using some combination of sensors to decide? I have little experience...
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    If you invent a tool, and you don't get a patent...

    If you invent a tool, and you don't get a patent or provisional right away, and you use it at work, and someone sees it, it is considered as disclosed publicly, especially if you have waited a year...
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    If this unit has a CTI board, look at the front...

    If this unit has a CTI board, look at the front of the CTI board and make sure none of the components are leaning over and touching another component. CTI boards parts are soldered very high on the...
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    Now I'm studying how to make proper drawings and...

    Now I'm studying how to make proper drawings and use the correct words. I intend to get a provisional patent, which will last 1 year. Then I will offer the idea to a few companies. If they don't buy...
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    Freezer must be off so line is warm when gluing....

    Freezer must be off so line is warm when gluing. You must follow the instructions on 520 Armiflex glue exactly or it will not stay stuck; i.e., It must be almost dry on each side before pressing...
  12. Thread: van hooks

    by mccann
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    1,936

    Just admit it; the Hose'n wire hooks are better....

    Just admit it; the Hose'n wire hooks are better. Soft, strong, long lasting, adaptable, cheap to made from scrap hose, fun for the whole family. Throw those other straps and hooks away. Men with a...
  13. Thread: van hooks

    by mccann
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    1,936

    van hooks

    With some good stout fence wire and some hose material you can make nice hooks for the van.
    On the two sided hook, when you unhook one side to get a belt, the hook stays up making it easy to sort...
  14. I got ahold of Lennox support. They said the...

    I got ahold of Lennox support. They said the motor manufacturer does not recommend twinning, so units should be replaced.
    I spoke with Jackson Systems, who sell the iO-Universal-Twinning kit, same...
  15. I don't think you are being harsh; I think you...

    I don't think you are being harsh; I think you are just a bit lazy at explaining why. There is no twinning board, which is the situation I am dealing with, will the safeties on the unit will not...
  16. That was my concern. I have read similar things...

    That was my concern. I have read similar things on other threads, but was looking for someone with experience in a failure or direct knowledge of this unit. Lennox support was difficult to get ahold...
  17. Is a twinning kit always needed with system that does not have twinning terminals?

    The complaint is the house is slow to reach setpoint.
    Two questions:Is a twinning board always needed with twinned system that do not have twinning terminals? The system is wired with just t-stat...
  18. Trane only helps Trane employees I have found. It...

    Trane only helps Trane employees I have found. It seems to be their business model idea to force people to hire Trane perhaps.
  19. Reliatel boards do not need an interface board....

    Reliatel boards do not need an interface board. They have Y1, y2, etc, terminals so can work with regular t-stats.
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    No more answers. I guess I didn't ask good...

    No more answers. I guess I didn't ask good questions.
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    Thanks. I went back and replaced the supply...

    Thanks. I went back and replaced the supply sensor on the unit with supply setpoint alarm and the return sensor on the morning warm-up unit. The sensors were only $10 surprisingly from Trane. I did...
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    Never mind the side note regarding the dip switch...

    Never mind the side note regarding the dip switch setting on the UVM for VFD, I see it says UCP dip switch location not UVM.
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    old trane 50 ton controls and alarms

    Trying to understand controles to old 50 ton Trane. Tracer alarms show morning warm up setpoint fail on one unit and a SA temperature setpoint fail on another unit.
    Is the morning warm up setpoint...
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    don't see new post I did

    posted in commercial. My activity shows no new activity and I don't see my post.
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    There's a thread someplace on HVAC Talk called...

    There's a thread someplace on HVAC Talk called "finding a vacuum leak" where he used isopropyl alcohol. Interesting I thought.
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    Put 60 amp time delay fuses. Have fun and...

    Put 60 amp time delay fuses. Have fun and experiment. Perhaps the load holds back the shaft and the windings shift somehow on their mounting inside and short. I just made that up, ha ha, but who...
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    Wet rags on the head (be gentle) and a fan to...

    Wet rags on the head (be gentle) and a fan to keep area cool will do it. One time I just about got knocked off my ladder when one went off. I did not hit it with the torch. It just got crazy hot the...
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    What is a bridge or a centrals? I come from an...

    What is a bridge or a centrals? I come from an old commercial world.
    Sounds like you did the total show with the nitro, drier and triple evac and all, you must have been moving fast with drive time...
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    If you can't change the oil use 427a. If you can...

    If you can't change the oil use 427a. If you can change the oil go with 407c. That is the best you can do for your customer and your soul.
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    Your superheat may not be as low as you think....

    Your superheat may not be as low as you think. The glide is very big.
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    Also if you torch it while running, don't be...

    Also if you torch it while running, don't be fooled by the inlet refrigerant coming into the receiver splashing. It can make you think you have more than you do.
  32. Thread: iManifold setup

    by mccann
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    In my humble opinion: Superheat at the...

    In my humble opinion:
    Superheat at the condenser can be tricky. Measured suction line just before the compressor depends; Copeland wants it between 60*f and 20*f to protect the compressor, not...
  33. Alas; the transformer and other connections were...

    Alas; the transformer and other connections were all correct and in phase.
    We found that when we removed both lockout relay connections from the CommStat; the smoke alarm would timeout and reset...
  34. Two control transformers, 3 phase power, Commstat 4 smoke alarm

    If two control transformers get primary power from different legs of 3 phase could it cause problems when their power comes together in a controller?
    New install: Two CommStat 4's (master-slave) are...
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    Yes, we do the same. This is a log I drew up that...

    Yes, we do the same. This is a log I drew up that I use on the PM. A lot of the info I can get from the from the controller, so I'm not connecting gauges. It's newer than the unit discussed in this...
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    At a very busy hospital, we had a pump fail on a...

    At a very busy hospital, we had a pump fail on a Kraus and they lost a bunch of Helium that was very expensive they said, as well as not being able to take care of patients. I don't know how long it...
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    Hahahahahahahahaha

    Hahahahahahahahaha
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    Magnet will not quench? What does that mean?

    Magnet will not quench? What does that mean?
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    It would be nice if the motor manufactures made...

    It would be nice if the motor manufactures made that screw plug on the bottom of the motor easier to access; perhaps an angled tube or something. But that would not sell motors. It's near impossible...
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    I went to a Carrier controls class. There were...

    I went to a Carrier controls class. There were salespeople and expert controls people. I am neither. It was just to get on the list to sell their stuff. It seemed user unfriendly and unstable to me....
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    "running a dairy" hahahaha

    "running a dairy" hahahaha
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    Refrigerant problems like compressor full of...

    Refrigerant problems like compressor full of liquid would tend to cause lock-rotor which would be a relatively slow (electrically speaking) high amp problem which typical panel overloads can handle...
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    Well we installed 10 of these on some Carrier...

    Well we installed 10 of these on some Carrier package heat pumps and they are working well so far. They sent a factory guy down to help us with this first install and he was excellent. I hope to see...
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    I thank you all for your assistance. Alas. One of...

    I thank you all for your assistance. Alas. One of our other tech's want back because I was too busy. He changed the defrost board and outdoor stat, as that was my first guess before getting to put...
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    Good point. I did not have time to check the...

    Good point. I did not have time to check the charge when I was there, but I certainly will.
    Question: If charge is low and I'm in heat; then in defrost; would that effect defrost termination or are...
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    Ay, if the room is cold and cold outside it may...

    Ay, if the room is cold and cold outside it may be hard for that stat to close again. I assume it closes back around 45*f, but it's a klixon not a precision instrument. It would be nice to kick it...
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    I believe it is 5% minimum approx.

    I believe it is 5% minimum approx.
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    Carrier, defrost and freeze stat.

    RTU freeze stat had opened during defrost cycle. So compressor is off, Blower runs and makes the room even colder, 50*. Ambient 29*F. Jumped out freeze stat for awhile and started heating. 10 minutes...
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    If it has an intuitive, easy interface, clear...

    If it has an intuitive, easy interface, clear wiring and connections, then I'm all for it. From what I read, it does. I hope it's easy to troubleshoot or bypass if necessary too.
    The crap that's out...
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    If I put a resistor in series, it seem it would...

    If I put a resistor in series, it seem it would not change the current signal, and would give me a test point. 250 ohm would give a 1-5vdc or 500 ohm would give a 2-10vdc reference. Perhaps it...
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