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  1. Yes the T775 is for the 3 way valve. The Heat...

    Yes the T775 is for the 3 way valve.

    The Heat timer controls the boiler reset via OA both start stop, and the modulation signal to the burner and also the main system pump.

    The T775 controls...
  2. After. Gonna clean up the wiring in the control...

    After. Gonna clean up the wiring in the control enclosure after the OA damper is replaced, as a little more wiring needs to be done to interlock the OA damper once its...
  3. Smallish Hot water boiler just wrapped up this AM

    All work was in house, no outside vendors used. Still need replace the OA damper and louvers.
    ...
  4. Thread: Wire crimps

    by heatingman
    Replies
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    Views
    1,813

    Maybe its the other set I have thats not...

    Maybe its the other set I have thats not bidirectional.


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  5. Thread: Wire crimps

    by heatingman
    Replies
    34
    Views
    1,813

    Just heads up. The terminal only goes one way,...

    Just heads up. The terminal only goes one way, and I always forget which. So try it both ways, and give the wire a good tug to be sure you did it right.


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    Yeah, but not too old of one. Buy one used, make...

    Yeah, but not too old of one. Buy one used, make sure the motor is in good shape. If it does not pull well, take apart and clean it. Or order a new cartridge and shaft seal from Zoro (best prices Ive...
  7. You need to measure in the straitest segment of...

    You need to measure in the straitest segment of duct possible.

    Many times, especially on smaller systems or those in tight locations, there are no good locations, so you do the best you can.
    ...
  8. It means there is turbulence/eddy currents ...

    It means there is turbulence/eddy currents

    Believe it or not, Ive seen 6” supply take offs mounted in such a way that they actually flow in reverse due to the same phenomenon.


    Sent from my...
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    Very interesting video. Sent from my iPhone...

    Very interesting video.


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    Pinhole leaks in what? The refrigerant lines? ...

    Pinhole leaks in what? The refrigerant lines?


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  11. Replies
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    I appreciate the wishful offer. This is the...

    I appreciate the wishful offer. This is the second house Ive extensively remodeled. The first one is the home Im living in now which is also the first house I bought, about 14 years ago. The plan was...
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    Wayne, what pitot fits a self taping hole? In...

    Wayne, what pitot fits a self taping hole?

    In my mind, a self tapper is 5/16 head, maybe 1/8” hole.

    My pitot is closer to 1/2 diameter if I had to guess.


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    First custom made kitchen exhaust hood

    Extensive interior remodeling. Relocated bathroom, relocated laundry room, reconfigured the kitchen with new cabinets that I essentially made, added a door, swapped different sized window locations,...
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    That job would be T and M only. Sent from my...

    That job would be T and M only.


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    Thanks. I have not yet tested the hood flow. ...

    Thanks. I have not yet tested the hood flow.

    At this point I probably wont cause I dont want to put any holes in the ductwork. And Ive yet to figure out the Shortridge vel-grid.

    My test for...
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    Theres only about 4” total of flex duct, and...

    Theres only about 4” total of flex duct, and really only about 1/2” exposed to air stream the for vibration mitigation. Its really more like a flex coupling at the inlet to the fan. The rest is hard...
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    If you do the kf-16 mod, you can probably find a...

    If you do the kf-16 mod, you can probably find a kf-16 brass blank, such as this one for under $15.00

    https://uploads.tapatalk-cdn.com/20201016/3a4d0ca84038df662464b1ec2e9b42c8.jpg


    Then drill...
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    What is the O2 reading when your having the...

    What is the O2 reading when your having the issue?

    CO2 and efficiency are calculated based on type of fuel, O2 and stack temp.

    If the O2 is not below 12 percent or so, none of the calculated...
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    Do you mean CO? CO2 would not show in PPM. ...

    Do you mean CO?

    CO2 would not show in PPM.

    - - - would likely indicate CO reading over the scale, usually over 1000 ppm.


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  20. Replies
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    Ive had similar issues with a Bacharach I use to...

    Ive had similar issues with a Bacharach I use to have. I would never get an alert or alarm that the O2 sensor was crapping out, but all the sudden, it would read wonky.

    So I just starting...
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    Did they replace the sensor as part of the...

    Did they replace the sensor as part of the calibration?


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  22. Do I need to change jobs or my perspective?

    Its not all roses and sunshine, and I did not get to this point overnight. But Ive been exactly where you are.

    A good segway to commercial would be a shop that does both commercial and...
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    Whats sad is that was probably a pretty nice...

    Whats sad is that was probably a pretty nice looking install before that happened.


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    Get the combo pack with the standard drill and...

    Get the combo pack with the standard drill and impact.

    The fuel stuff is without a doubt better, but also a bit more money. So if your on a budget, get the lowest cost combo with 1/4” hex impact...
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    Your talking about a different impact altogether....

    Your talking about a different impact altogether.

    For HVAC work, most usefull is 1/4” hex impact.

    3/8 or 1/2” impacts are square drive for use with impact sockets. There are uses for those in...
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    I have no experience with Flir other then the IR...

    I have no experience with Flir other then the IR tech.

    But I looked that meter up, it looks decent but comes up at 600. You could get a fluke for that money.

    I have a Fluke 1507 and bought it...
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    Thats the plan, but I needed to confirm the...

    Thats the plan, but I needed to confirm the calculation to find gas cfm, so I can convert to cfh to find btu content. And also a special pitot tube.

    If I just used the standard velocity readout...
  28. I sure hope that does not mean 80 hrs work gets...

    I sure hope that does not mean 80 hrs work gets you 40 hours pay.


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  29. You must have gotten the receding type head that...

    You must have gotten the receding type head that can do several sizes in one head.

    12R or 00R would have been approximately the same as the goplus.


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  30. Replies
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    Those would work, but the problem for me is I...

    Those would work, but the problem for me is I would need one pitot per pipe size.

    Would be easier in the long run, but alot more money.

    Likely almost 2 K by the time I get all the pipe sizes....
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    Thanks Wayne. I will be using a Micro-Manometer...

    Thanks Wayne. I will be using a Micro-Manometer for getting the pressure readings from the Pitot.


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  32. Replies
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    Heres a link with some formulas that may be of...

    Heres a link with some formulas that may be of use to my purpose.

    They have K factors in the formulas which may not apply to a single point pitot.

    But other then that, these formulas are the...
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    Gas flow measurement

    Wayne, thanks for posting.

    The pitot in the referenced page is an averaging pitot - purpose built for a specific pipe size.

    My approach would be to use a single point pitot tool, and traverse...
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    Really wish this covid crap was not going on,...

    Really wish this covid crap was not going on, cause I usually take a test and ballance refresher coarse. And the guy that teaches the class would know this off the top of his head.

    Im pretty sure...
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    I found this on Omega.com - they make Pitot...

    I found this on Omega.com - they make Pitot tubes. But I cant figure out what to use as a dimensional Constant anywhere.



    ...
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    Thanks Sent from my iPhone using Tapatalk

    Thanks


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  37. That’s exactly what I want to do. Not for small...

    That’s exactly what I want to do. Not for small stuff. Large power burners (like over 1000 MBH) Typically I set firing rate absent a dedicated gas meter based on stack temp and fuel pressure. Its...
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    Gas flow measurement

    Im wanting find a universal pitot I can insert into a gas line for flow measurement.

    I think I can use a Dwyer 160F for this purpose and traverse the line for an average.

    Using compression...
  39. Think a Dwyer 160F may be more of what Im looking...

    Think a Dwyer 160F may be more of what Im looking for.


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  40. One of my favorite songs. Sent from my...

    One of my favorite songs.


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  41. Southside Control. Its the name of a commercial...

    Southside Control. Its the name of a commercial hvac controls supply company in Chicago. 2SAC works there, and Im a customer.


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  42. Replies
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    Feel free to copy with or without modifications. ...

    Feel free to copy with or without modifications.


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  43. Replies
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    Thanks guys. Copper would probably look sharp,...

    Thanks guys.

    Copper would probably look sharp, especially for something outdoors cause it would eventually get that greenish patina.

    I know the tin tiles are available in copper.


    Sent...
  44. You got lucky. Get some permabond to put that...

    You got lucky. Get some permabond to put that stuff back together.


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  45. You’ve got mail. Sent from my iPhone using...

    You’ve got mail.


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  46. It was RKA Applied. Not sure if Southside can...

    It was RKA Applied. Not sure if Southside can even get it. But Ill send the quote I got to the email you have listed in your profile.


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  47. Would really just require adjusting depth for...

    Would really just require adjusting depth for multiple readings and re-averaging.

    Like a traditional duct traverse. But there would still need to be specific gravity corrections.

    Its...
  48. Thanks. I did find that, but read it again. Shows...

    Thanks. I did find that, but read it again. Shows they want a 1/16” clearance to the pipe wall. So that seems to indicate the need for 1 for each size.

    May not be the economical solution I was...
  49. Dwyer ds-300 averaging pitot for gas flow read out.

    Lately Ive been looking into ways to accurately prove gas flow when a gas meter is not dedicated to the burner.

    Ive come across a few options, most are rather expensive. Then I came across these....
  50. Your gonna have to open the wall and find that...

    Your gonna have to open the wall and find that joint. Highly unlikely it just unthreaded. You probably sheared the pipe or cracked a fitting. Maybe worse, if a tee, may have to address multiple pipes...
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