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  1. Replies
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    I do a LOT of CX. That is why my handle is...

    I do a LOT of CX. That is why my handle is CXagent.

    Do I know as much at the TAB, GC or Controls guys? On each job I probably do not know as much as the ones who installed and lived with making it...
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    CX = Commissioning. Some good points here. I...

    CX = Commissioning.

    Some good points here. I especially agree with Wayne - your integrity is everything. Defend it like your life depended on it. Ok - so only your livelihood depends on it.
    ...
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    That picture from napolean-dynomite looks a lot...

    That picture from napolean-dynomite looks a lot like this one.

    812514

    Yes - those are the return ducts that "should" be connected to the that filter grill.
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    1,780

    Carrier knockouts - don't. That is my...

    Carrier knockouts - don't.

    That is my experience with Carrier knockouts. I now carry a hole saw to solve this problem. And I make sure to create all the holes I need for the entire installation...
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    5,960

    What an idiot!!! I would NEVER do things like...

    What an idiot!!! I would NEVER do things like that.

    Oh wait - I have. And too many times to remember all of them. Actually, I have to go back today to finish what I didn't finish at 8:00 PM on...
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    Everybody is entitled to their own opinion. I...

    Everybody is entitled to their own opinion.

    I never installed surge suppressors when the controls were all relays/contactors. Even if I had to replace all the controls it was cheaper than a surge...
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    1,843

    First the right answer - do a load calculation...

    First the right answer - do a load calculation and air flow balancing. That will take a REALLY good tech or a good engineer. Both are in short supply.

    Now for a usable answer - balance the air...
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    Dad - Help!!! I changed my email address and...

    Dad - Help!!!

    I changed my email address and seem to be locked out of the Pro Forum. Can you fix me up again? I need to post a question and wanted to put in the Pro Commercial area.
  9. Replies
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    2,972

    beenthere - Windings to ground showed open on all...

    beenthere - Windings to ground showed open on all three wires.

    PCP - I plan to repair the module and reinstall it. It will be a little over a month before I can get to it.
  10. Replies
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    Here is a quick update. 1) Wife called griping...

    Here is a quick update.
    1) Wife called griping about heat not working.
    2) Drop everything to get parts. I'm still thinking it is just the module but the resistance readings both me.
    3) At the...
  11. Replies
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    2,972

    Short the meter leads together and I get 0.1 ohms...

    Short the meter leads together and I get 0.1 ohms steady.

    Blower wheel and motor mounts are good.
  12. Replies
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    2,972

    Core_d The motor and magnets generating a...

    Core_d The motor and magnets generating a voltage was what I thought was happening.
  13. Replies
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    10,562

    Beenthere has your answer. In my experience...

    Beenthere has your answer.

    In my experience if a system will hold a 200+psi pressure test but shows a leak under vacuum you have one of two problems. 1) moisture left in the system to remove...
  14. Replies
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    2,722

    I would guess that the connecting rod failed...

    I would guess that the connecting rod failed first. The piston and everything else was damaged after the rod broke.

    As far as liquid causing the rod to break - maybe. I have seen a lot of...
  15. Replies
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    2,972

    ECM Motor Question

    I need some opinions here. MY furnace blower quit tonight. Carrier model 58CVA110 Shows a blower fault. Sure enough the blower rocks but never turns. I pulled the blower out expecting it to be a...
  16. Replies
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    5,891

    We used to do that. But someone knocked a 'dummy...

    We used to do that. But someone knocked a 'dummy t/stat' off the wall once and found there were no wires connected to it. So we started hooking wires to them and run the wires to above the ceiling....
  17. This sounds like an intermittent open on the...

    This sounds like an intermittent open on the limit circuit. I would suggest jumpering around the limit circuit but it sounds like you already have. So I would look VERY closely at the connector...
  18. So which brand do you buy - Chevy or Ford? At...

    So which brand do you buy - Chevy or Ford? At least those are built and testing in a factory before they are sent to the customer. A split system is assembled and run for the first time at your...
  19. Replies
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    3,560

    This used to be what most techs thought. But...

    This used to be what most techs thought. But since the residential code started requiring duct leak test in 2009 - you need a way to test or you have to hire a 3rd party to do the tests. Most...
  20. I haven't been back on here in a while and I just...

    I haven't been back on here in a while and I just say the responses since my last post. We think we have this one solved. I won't go thru all we did, but it was a mess. As said above the RTU was...
  21. Thanks for the info. I just downloaded some...

    Thanks for the info.

    I just downloaded some data logs on three of the RTUs. The OA damper never closes. The blowers never turn off. On two of the units one compressor is running continuously...
  22. Replies
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    I have seen things like this. Usually it is due...

    I have seen things like this. Usually it is due to a failed duct leak test. The installer is sure his ducts aren't leaking so he seals everything else up to "prove" his ducts weren't the leak. ...
  23. Model YHD150F3RLB0E0F Serial 143011092D And...

    Model YHD150F3RLB0E0F Serial 143011092D And there are 4 more RTU of different sizes.

    It is a newer RTRM board with the CTI built in. It has a conventional 2-stage programmable thermostat hooked...
  24. Replies
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    You must be as old or older than I am.

    You must be as old or older than I am.
  25. I found the Reliatel Control book. Page 46 and...

    I found the Reliatel Control book. Page 46 and 47 seem to confirm what I was seeing / thinking about the conventional t/stat control.
  26. Trane Voyager Controls with conventional T/stat Question

    I need some help understanding what the Trane Voyager controls do when a conventional thermostat is used to control the unit.

    I have looked up the Trane "black book" and read thru it. My...
  27. Replies
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    Thanks for the link @jayguy. That is just what I...

    Thanks for the link @jayguy. That is just what I was looking for.
  28. Replies
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    I just saw this because I'm looking for something...

    I just saw this because I'm looking for something similar but 20 tons. For humid areas like Austin make absolutely sure you use enthalpy control. Dry bulb control will make the space extremely...
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    I saw the 550 advertised for what I thought was a...

    I saw the 550 advertised for what I thought was a great price and ordered it. I looked on line and there was a 4 valve manifold but it didn't offer some of the features I wanted (like blue tooth...
  30. Thread: Hose gaskets

    by cxagent
    Replies
    33
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    25,784

    I used to replace the gaskets when they leaked or...

    I used to replace the gaskets when they leaked or looked like they might leak. Then I was working on a roof when it rained on me while I was charging a unit (about 1978 or so). I saw all kinds of...
  31. Replies
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    You didn't post enough info to say for certain...

    You didn't post enough info to say for certain but I bet the root problem still exists. If I were to take a wild guess I would say that the super heat on that system was about zero and you were...
  32. Thanks Rundawg! Yes that exactly what I had...

    Thanks Rundawg! Yes that exactly what I had found and was coming back to post. I had not found that Sustainable Coils might be able to help me. I had resigned myself to starting early one morning...
  33. Replies
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    I usually agree with PHM - but not this time. A...

    I usually agree with PHM - but not this time. A piston compressor will rarely equalize thru the compressor because the reed valves prevent reverse flow. If the system can't equalize thru the...
  34. Replies
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    I have replaced 1 X13 motor this year (only one I...

    I have replaced 1 X13 motor this year (only one I have installed in the past several years) and 2 ECM motors. Two of the three replacements were right after a thunderstorm so I suspect electrical...
  35. Need info on the manufacturer of an evaporator coil

    I found a leaking coil on a Rheem system (furnace & condenser). The nameplate was barely readable but clearly was not a Rheem coil. Can someone identify the manufacturer?

    Coil model number...
  36. Replies
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    Posted resolution in Pro Forum.

    Posted resolution in Pro Forum.
  37. Replies
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    1,061

    DCs601C71 Manuals at...

    DCs601C71 Manuals at http://www.daikinac.com/content/commercial/accessories-and-controllers/intelligent-touch-controller-dcs601c71/ There is no 'other' front end.

    I have been digging thru those...
  38. I read about those in the old Doolin...

    I read about those in the old Doolin Troubleshooting Bible (mine was about a 1970's version). I had never actually seen one though. I recently (2005) ran across a could of them on a museum. They...
  39. I thought most of the very old refrigeration rack...

    I thought most of the very old refrigeration rack systems were a kind of VRF system. Those that ran a compressor to charge a liquid receiver and then cycled off the compressor. Then the...
  40. Replies
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    I checked the Advanced menu but wasn't able to...

    I checked the Advanced menu but wasn't able to change it there. You may have hit on the problem. Is there something I need to do to make the factory default inactive?
  41. Replies
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    1,061

    iTouch Programming Question

    I have what should be a simple problem that I can't find an answer. On a Daikin iTouch system I need to raise the heating set point to 70. Currently it is limited to 68 by the controller. I can't...
  42. Replies
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    Do you have similar pictures on flex duct systems?

    Do you have similar pictures on flex duct systems?
  43. Replies
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    This installation is on a museum so down time is...

    This installation is on a museum so down time is critical. Add that budgets are non-existent at the moment. I don't think vibe analysis is going to show much without a baseline. Oil sample might...
  44. Replies
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    Oil Migration problem on Carrier 23XL Chiiler

    I did a search before posting this but didn't find anything -

    We have a 225 ton Carrier 23XL chiller. It was installed new about 1996 when it replaced one of two 175 ton Carrier 19DG chillers. ...
  45. Replies
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    I would bet that most of these were shown on the...

    I would bet that most of these were shown on the drawings and the person in charge rejected the change order. So they built what was on the drawings.
  46. Replies
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    EXACTLY like the Cornwell. I bet they were the...

    EXACTLY like the Cornwell. I bet they were the company that made them for Craftsman.
  47. Replies
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    2,779

    I was looking for the box that held about 7 or 8...

    I was looking for the box that held about 7 or 8 sockets - nothing else. The entire set in the box was about 4" long x 3/4" wide x 1" tall. I'm guessing on the dimension since I don't have the set...
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    That's what I was hoping for! Somebody knew...

    That's what I was hoping for! Somebody knew where I could find replacements. I'll hit the NAPA store tomorrow.

    My truck was sitting in my driveway at my house. My driveway is a good way from...
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    Stolen tool pouch

    My tool pouch/belt was stolen out of my truck a few nights ago. I have had the pouch since I was in high school in the 1970's. I have tried to replace it a few times but always went back to the old...
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    Change Summit to not report that error until it...

    Change Summit to not report that error until it has existed for 5 minutes. That doesn't fix the problem, but at least you don't have to look at it so often.
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