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Type: Posts; User: gravity

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  1. Replies
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    Not if its leaking at the gasket where it screws...

    Not if its leaking at the gasket where it screws in


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  2. Replies
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    493

    Micro bluvac Sent from my iPhone using...

    Micro bluvac


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  3. Replies
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    548

    The core removal tool is shady to use. It is a...

    The core removal tool is shady to use. It is a quick lock fitting. I would relieve the pressure and replace it.

    I prefer cutting them out and replacing with a standard shraider.

    They are used...
  4. Add a new one on the tee. Or Close the...

    Add a new one on the tee.

    Or

    Close the valves and transfer the gas to the refrigerant lines and indoor coil side to 10psi and do it on the fly


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  5. Replies
    10
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    420

    PSC or X13 replacement?

    Is the motor or module bad?

    Usually the transistor goes bad in the module. You can buy a new one for $20 and solder it in place


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  6. Thread: Columbia CT-35

    by gravity
    Replies
    10
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    455

    Thanks for the update. Good job. I have had this...

    Thanks for the update. Good job. I have had this exact problem before.


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  7. Replies
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    https://uploads.tapatalk-cdn.com/20190909/af8f6f0c...

    https://uploads.tapatalk-cdn.com/20190909/af8f6f0ccf14b45959b8ec74fdc3149b.jpg


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  8. Replies
    33
    Views
    1,469

    Who goes to work for less than 8? [emoji2960] ...

    Who goes to work for less than 8? [emoji2960]


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  9. Replies
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    547

    Use G for the coil Take L1 from blower relay...

    Use G for the coil

    Take L1 from blower relay on board and land on C. Take NO on relay and wire to AC speed for blower.

    Take heat speed and put on NC on other contact on the relay. Make a...
  10. Replies
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    464

    Sounds like it was flooding before u got there...

    Sounds like it was flooding before u got there which doesnt cool the best.

    You strapped the bulb, probably broke it, which let out the charge in the bulb.

    You went back outside and it was in...
  11. Thread: 2 new boilers

    by gravity
    Replies
    4
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    405

    Lochinvar Knight boiler Sent from my iPhone...

    Lochinvar Knight boiler


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  12. Replies
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    1,469

    The union insulators are fast, smart, and do...

    The union insulators are fast, smart, and do excellent work


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  13. Replies
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    1,469

    I wasnít there. Im sure he billed 8 hours ...

    I wasnít there. Im sure he billed 8 hours


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  14. Thread: 2 new boilers

    by gravity
    Replies
    4
    Views
    405

    https://uploads.tapatalk-cdn.com/20190907/26f016d4...

    https://uploads.tapatalk-cdn.com/20190907/26f016d4731f616bf82bb21138fdb0ad.jpghttps://uploads.tapatalk-cdn.com/20190907/58d8ced6d0e3f23573a55591b8054404.jpghttps://uploads.tapatalk-cdn.com/20190907/f0...
  15. Replies
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    940

    If you have a hard shutoff / non-bleed txv, you...

    If you have a hard shutoff / non-bleed txv, you will notice pressure will pass thru the expansion valve until a certain point and then it will stop flowing.

    (Taken from Bryan Orr - HVAC SCHOOL)
    ...
  16. Thread: 2 new boilers

    by gravity
    Replies
    4
    Views
    405

    2 new boilers

    Old boilers were hydrotherm condensing. It was a primary loop, return from the system into a tee. The tee fed both boilers. Donít know how it ever worked right.

    Converted it into...
  17. Replies
    39
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    1,554

    Barely touch fitting with small turbo torch. Flow...

    Barely touch fitting with small turbo torch. Flow staybright. Complete


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  18. Replies
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    1,554

    Staybright 8 Why are so many people scared of...

    Staybright 8

    Why are so many people scared of it?

    Cant fill big gaps. Needs to be tight


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  19. Replies
    5
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    396

    Ive known to be wrong. I believe the minimum 16í...

    Ive known to be wrong. I believe the minimum 16í is due to noise from the refrigerant. Not a performance issue.


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  20. Replies
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    1,556

    Oversized RTU freezing coil

    Is your fan spinning the right way?

    Sounds like you need some HGBP or a RAWAL valve.

    I would also install head pressure control / motor master and set for 400psi. This will keep the head up,...
  21. Replies
    33
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    1,469

    Local 24. DC Sent from my iPhone using...

    Local 24. DC


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  22. Ive done this. They still go low. Just not as bad...

    Ive done this. They still go low. Just not as bad

    Convert temp to *Kelvin
    P2 = p1 * (t2/t1)



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  23. Replies
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    1,469

    They could have came thru the floor and kept them...

    They could have came thru the floor and kept them low, go around the unit to the right and behind and back up.

    I agree, it does look like crap. Lazy IT guys


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  24. Ive always used a refrigerant hose to charge...

    Ive always used a refrigerant hose to charge tires.

    Maybe itís because i keep my gaskets fresh.

    I just align it up and push it tight to the valve stem and fillerup.

    No leaking


    Sent...
  25. Replies
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    427

    Rule of thumb..... 20x20 tops is 800cfm ...

    Rule of thumb.....

    20x20 tops is 800cfm


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  26. Replies
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    1,554

    Everything here sounds good Copper to steel...

    Everything here sounds good

    Copper to steel with 45% takes more heat then brazing copper to copper with 15%.

    I follow everything above. The only extra thing i do is cut a long piece of 45% off...
  27. Replies
    9
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    Not too shabby. Everything looks crooked though....

    Not too shabby. Everything looks crooked though. Flue is done nicely.

    Any vanes in the return?

    That water heater needs some attention. I cant see it venting that well with big flue


    Sent...
  28. Replies
    33
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    1,469

    Had the pros do it Union insulators Sent...

    Had the pros do it

    Union insulators


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  29. Replies
    33
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    1,469

    After pictures if insulation ...

    After pictures if insulation


    ...
  30. Stulz has a lot of catching up to do. Started...

    Stulz has a lot of catching up to do. Started many stulz and had them under contract. Not a big fan


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  31. Replies
    25
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    1,557

    Low head pressure, high suction pressure...

    Scrolls have a stationary scroll on a spring and another scroll that orbits which is attached to the motor.

    It sounds like the scroll tips are gone or the spring is stuck up and wonít reset back...
  32. Replies
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    1,469

    Thats a pretty good idea. If they just...

    Thats a pretty good idea.

    If they just switched to glycol. Everything would be good


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  33. The issue with such a big unit will be staging...

    The issue with such a big unit will be staging and the airflow.

    If you have a 20ton unit with 4 independent circuits, thats great. But, when you goto only 1 stage (5 tons) will the fan be able to...
  34. Trane and AAON. I would go a 2 unit route. 20...

    Trane and AAON. I would go a 2 unit route.

    20 ton and say a 5ton when the lights go out.

    Have the 20 ton ductwork on top and the 5 ton ductwork under it.

    Mimic the duct runs, supply, and...
  35. Replies
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    1,469

    Sterling 95/5 Nokorode paste flux I was...

    Sterling 95/5

    Nokorode paste flux

    I was given specs of the coil. Freeze pump i was told to design at 1/3 of gpm of coil

    51gpm coil

    17gpm at 15ft/hd
  36. Replies
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    1,469

    Dislike Sent from my iPhone using Tapatalk

    Dislike


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  37. Replies
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    1,404

    You should add some more pressure ports when you...

    You should add some more pressure ports when you install the new compressor.

    One on liquid at the txv. The txv must have taken it out.

    Itís probably been bypassing the whole time. Thats why...
  38. A desert aire dehumidification unit would work...

    A desert aire dehumidification unit would work great.

    What are the design requirements?


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  39. Replies
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    1,469

    Actually, if i have a drip about to occur, i...

    Actually, if i have a drip about to occur, i wipe/flick it with my finger on my pants. Lol


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  40. Replies
    33
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    1,469

    Just dont drip [emoji1303] Sent from my...

    Just dont drip [emoji1303]


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  41. Replies
    33
    Views
    1,469

    https://uploads.tapatalk-cdn.com/20190823/f8418274...

    https://uploads.tapatalk-cdn.com/20190823/f8418274bf8b38e7bb586095bf44d9d4.jpghttps://uploads.tapatalk-cdn.com/20190823/55d677db5d33e0c1ef94a82dc946a2f6.jpghttps://uploads.tapatalk-cdn.com/20190823/b7...
  42. Replies
    33
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    1,469

    The unit has a freeze stat that; Closes o/a...

    The unit has a freeze stat that;

    Closes o/a damper. Opens control valve 100%. Shuts the fan off.

    I tested operation and verified it worked. First time seeing the unit, the county takes care of...
  43. Replies
    33
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    1,469

    New piping from the tee on the supply to the...

    New piping from the tee on the supply to the bottom of the actuator flange on return


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  44. Replies
    33
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    1,469

    Freeze pump on 100% OAU

    Installed a freeze pump for a 100% OAU. Dual temp coil. It has frozen 2 years in a row. More pics to come.

    Motor starter has HOA. Hand runs pump 24/7. Auto runs thru a Tstat set at 40* to run the...
  45. Replies
    17
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    1,125

    Should have used staybright8 Sent from my...

    Should have used staybright8


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  46. Mitsubishi for the win. Their newest software has...

    Mitsubishi for the win. Their newest software has refrigerant diagram like the samsung.

    I am a startup guy for Mitsubishi and Samsung. I also deal with LG, and Daikin.

    Mitsubishi is by far...
  47. Thread: Boland Trane

    by gravity
    Replies
    7
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    939

    I work for Boland. Great company. Donít see...

    I work for Boland. Great company. Donít see anything happening for many many years.

    If something were to happen. It would be a MD district for sure.

    I believe we have 130 trucks on the road
    ...
  48. Replies
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    974

    Non condensables Sent from my iPhone using...

    Non condensables


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  49. With the smaller suction, your velocity is...

    With the smaller suction, your velocity is increased which helps with the oil return.

    You could add a oil separator in the unit. As long as its sized and installed correctly, you wont have any...
  50. Replies
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    434

    - Widen the platform. - Try and find...

    - Widen the platform.

    - Try and find something to set some steel on and use rubber or springs for the unit to sit on.

    - Move the supports the unit currently sits on, out, and hit them on the...
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