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  1. Its probably scrambled. Try calling Danfoss,...

    Its probably scrambled.

    Try calling Danfoss, but My money is betting your gonna be replacing a drive in the near future.




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  2. Replies
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    What do you clear condensate lines with? And...

    What do you clear condensate lines with?

    And nitro is cheap.

    Like 35 for 80 CF refill I think


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  3. Replies
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    Whats that goober on the pipe at the base of the...

    Whats that goober on the pipe at the base of the CoreMax ports about?


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  4. Replies
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    Long Hoses for Nitrogen

    I just use 1/4 x 1/4 flare couplings and multiple normal hose.

    Not really for this, but for working on a unit in a ceiling for example, I can have the recovery unit and such safely on the ground....
  5. Collapsed evaporator tubes - anyone seen this before??

    The man said he removed the discharge piping to look inside the bundle.

    That and the copper and steel is way too clean to be the waterside.

    I realize the word discharge does not really go hand...
  6. Could boiling refrigerant be violent enough to...

    Could boiling refrigerant be violent enough to cause that?

    Like I said above, I believe water to be inside the tubes, and refrigerant to be in the shell.

    With the machine having been offline...
  7. Im not certain, cause I dont know what machine he...

    Im not certain, cause I dont know what machine he is working on, but it sounds to me like the water is in the tubes, and refrigerant is in the shell.

    You dont typically eddy current test the tubes...
  8. With steam? When steam is contained inside a...

    With steam?

    When steam is contained inside a vessel or pipe, or radiator, when it cools, the water vapors volume decreases significantly. Steam to water volume ratio is roughly 1600 to 1.



    ...
  9. The shell. Heres what water hammer damage...

    The shell.

    Heres what water hammer damage looks like, at least when steam is involved.

    https://uploads.tapatalk-cdn.com/20190913/67d3ff1c4c3bdfd3b2eb81a52de4fb0a.jpg


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    They make ones that modulate, not sure if that...

    They make ones that modulate, not sure if that one does or not.


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  11. Thats a good theory. Most heat exchangers of this...

    Thats a good theory. Most heat exchangers of this design I see are rated to 300 psi or better, shell and tube side.


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  12. Replies
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    JB makes the valves. It is called a core max....

    JB makes the valves.

    It is called a core max. You can probably get a pack of 20 for 60 bucks or less.

    I would not bother with the removal tool.

    Remove the gas and replace the core. It...
  13. Collapsed evaporator tubes - anyone seen this before??

    Cause, energy is lazy. It was easier to crush the tubes then steel support plate. That and it does appear on second look that the support plate is contouring to the pinch down of the tubes.


    Sent...
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    I assume a crane will be part of the job, no? ...

    I assume a crane will be part of the job, no?

    That would be the safest way.




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    Safety margin is typically 200 percent of rating....

    Safety margin is typically 200 percent of rating. So fully extended you might be okay with the as designed hoist.

    Add some jethro engineered extension and your not even in the ball park capacity...
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    Yes it can be. Sent from my iPhone...

    Yes it can be.




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  17. Cool. That energy saver mode sounds idiotic. ...

    Cool.

    That energy saver mode sounds idiotic.


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  18. Replies
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    Even if the equation is accurate, many times, the...

    Even if the equation is accurate, many times, the listed FLA on the unit for a given motor is not accurate to the actual motor used.

    Manufacturers will use motors that they have access to at a...
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    Its hard plastic Sent from my iPhone using...

    Its hard plastic


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  20. Yep. OP you have com to ch1 TT from the...

    Yep.

    OP you have com to ch1

    TT from the control needs to go to the R and CH1 on the boiler.

    Im not possitive about the need or lack of need to have a contact closure for “heat demand” on...
  21. Is anything landed on terminals 7-8 that say...

    Is anything landed on terminals 7-8 that say “heat demand” ?


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    I do think they are probably doing as you say and...

    I do think they are probably doing as you say and justifying their purpose.

    But as far as conflict, I dont really think so.

    Most balance contractors also do commission work.

    It would be a...
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    I assume the tenant is a restaurant. Restaurants...

    I assume the tenant is a restaurant. Restaurants are amazingly cheap when it comes to repairs of this nature.

    I bet if the tech would have asked for permission to make the temporary repair, they...
  24. Do you have access to a megger? Sent from my...

    Do you have access to a megger?


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    794

    Im not sure. But being lennox, Id assume its...

    Im not sure. But being lennox, Id assume its proprietary communications of some kind.




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  26. Replies
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    Almost sounds like the 1.5 ton condenser is the...

    Almost sounds like the 1.5 ton condenser is the only correct match, or the closest.


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  27. Replies
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    I have the m12 version and its a sweet little...

    I have the m12 version and its a sweet little light. Clamp and magnet. Works well.


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  28. Replies
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    794

    You can get a converter from 0-10 to pwm, or just...

    You can get a converter from 0-10 to pwm, or just get a control with a pwm output.




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  29. Replies
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    Is this a pump down system. Many Lieberts are,...

    Is this a pump down system.

    Many Lieberts are, and therefore have solenoids on the liquid lines.




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  30. Always default to the condensers charging...

    Always default to the condensers charging recommendations for the application.




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  31. Just go with what the outdoor unit nameplate...

    Just go with what the outdoor unit nameplate shows as a factory charge. Its an irrelevant question. You being in Cali, they are probably getting ready to implement a refrigerant amount surcharge, or...
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    Dan, Just remove the entire motor and blade set...

    Dan,
    Just remove the entire motor and blade set and bring it to Dreisilker Electric.

    They will match it up for you.


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  33. Replies
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    I have a hard time a puller wont remove it. ...

    I have a hard time a puller wont remove it.

    Ive never met a resi blower that cant be dismantled with a puller.

    The obvious would be a set screw you missed.

    I had one that had 2 allen set...
  34. Replies
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    Assuming you have the correct amplifier card for...

    Assuming you have the correct amplifier card for flame rectification, the problem is not the control itself.

    Now, whether or not the control is 100 percent correct for the application, that I...
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    No need to apologize, I just wanted you to have...

    No need to apologize, I just wanted you to have the best chance for a meaningful answer to your questions.


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  36. Replies
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    The flame rod needs to be one that fits the...

    The flame rod needs to be one that fits the burner, which I assume would be the eclipse.

    The original control, and the new control sound to me to be having the same problem. Flame failure,...
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    Your gonna want to have this moved, or repost in...

    Your gonna want to have this moved, or repost in the controls forum.


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    Fuji, will have to look into that. I bought...

    Fuji, will have to look into that. I bought something, not sure what at this moment, but I dont trust its readings.


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  39. Replies
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    Oh, that far left “valve” is not a valve, its a...

    Oh, that far left “valve” is not a valve, its a thermometer in a well.

    Now that’s ingenious.


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  40. Thread: Reznor VRF

    by heatingman
    Replies
    7
    Views
    332

    Ive never been a fan of the copeland digital...

    Ive never been a fan of the copeland digital scrolls.




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  41. Thread: Reznor VRF

    by heatingman
    Replies
    7
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    332

    Im intrigued that VRF is 75% of your work. I...

    Im intrigued that VRF is 75% of your work. I think thats kinda cool. Always good to have a niche.


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  42. Replies
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    208/230 nameplate 230/460 motor

    You need to slow down the blower.

    Carrier wants this done via the pulleys, as they expect high speed to run 60 hrz.

    You can change the programmed speeds aswell, but that requires an interface...
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    Wouldn’t the other valve on the left be...

    Wouldn’t the other valve on the left be sufficient?


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  44. Replies
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    956

    Whats the far left valve for? Sent from my...

    Whats the far left valve for?


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  45. Replies
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    What are you good at? Start with that. What are...

    What are you good at? Start with that. What are you interested in? Plan for that.

    Take whatever you can get. Just don’t sell yourself short. Its better to not do a job, then do a job that will...
  46. Is he trying to do automatic or manual change...

    Is he trying to do automatic or manual change over?

    I’ll check my stat at home when I get back this evening, but I think I may be able to do that with manual change over on it. Im pretty sure mine...
  47. Im not following what your asking. Are you...

    Im not following what your asking.

    Are you talking about a deadband between heating and cooling set points, or the differential to start the unit/stop the unit?


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  48. Replies
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    You need to charge by the units charging chart,...

    You need to charge by the units charging chart, or target superheat for the operating conditions.

    A smaller suction line if anything will reduce suction pressure, but on a short lineset, not by...
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    Ive done plenty. Sent from my iPhone using...

    Ive done plenty.


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  50. Replies
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    I believe 2 of the relays PHM mentioned would do...

    I believe 2 of the relays PHM mentioned would do the trick.

    It would be a cool project for your friend and his son to figure out the wiring together.

    I could draw something out, but I think...
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