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  1. Replies
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    How do you know you need refrigerant? I only...

    How do you know you need refrigerant?

    I only see part of the data needed to arrive to that answer.

    Put some meat on the bone if you want help.

    No offense meant but I'm wondering how often...
  2. Superheat is a good start. What is the net oil...

    Superheat is a good start.
    What is the net oil pressure?
    Is it intermittent? (transducer on the service valve. Don't completely close the valve)
    This is a recip compressor I believe. More detail...
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    That is a great idea. Maybe you can ask Emerson...

    That is a great idea.
    Maybe you can ask Emerson for guidance or check there bulletin.
    If it's a scrool be advised that the one for vfd have been modified to help the lubrification for both...
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    You told us previously that you had some...

    You told us previously that you had some electrical background.

    There is more than electrical that you'll need to think of.

    Your main concern as the system as not been designed for variable...
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    Where is chilly We haven't heard back from him?

    Where is chilly

    We haven't heard back from him?
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    We started to try Wd 40 ptfe dry lube. It...

    We started to try
    Wd 40 ptfe dry lube.
    It won't collect dust and don't smell to much.
    Will see if it pass the test of time

    You could go for a graphite spray. But be advised it's messy
  7. Replies
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    We started to try Wd 40 ptfe dry lube. It...

    We started to try
    Wd 40 ptfe dry lube.
    It won't collect dust and don't smell to much.

    You could go for a graphite spray. But be advised it's messy

    Will see if it pass the test of time
  8. Replies
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    Before adding or removing gas. Take all the...

    Before adding or removing gas.
    Take all the other numbers.
    It will help you figure out the problem
  9. Replies
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    You probably have a hot gas bypass feeding on...

    You probably have a hot gas bypass feeding on suction side. That may explain why pressure jump up and down.

    Is the unit undercharged?

    At that ambiant temp you should not be feeding with hot gas.
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    More detail will help. Is it recirculating air...

    More detail will help.
    Is it recirculating air or 100% fresh air.

    What is the td
    Suction pressure
    Discharge pressure
    Suct line temp
    Liquid line temp
    Taken at full load
  11. Thread: Oil Chillers

    by patpinet
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    334

    Refrigeration when you think about it is all the...

    Refrigeration when you think about it is all the same.

    Superheat will always be superheat 12-20 F close to operating temp is good.
    I'm assuming you have a small type of chiller if you don't have...
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    If you call a technician he should have the...

    If you call a technician he should have the technician password
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    I didn't know that aaon where using Toshiba vfd. ...

    I didn't know that aaon where using Toshiba vfd.

    New setup or older stuff?
  14. Just saying. Vdc =temp in celsius not F ...

    Just saying. Vdc =temp in celsius not F

    Depending on how much offset you have. At some point its no good to recalibrate. Let say above 5 f
    I believe recalibration is done at startup or as fine...
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    The question was asked mostly because I'm...

    The question was asked mostly because I'm curious. I did learn about the Siemens bt300 that I haven't seen on our side of town.

    Everybody has something they like about a particular type of drive....
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    Funny honeywell smart vfd look a lot like the...

    Funny honeywell smart vfd look a lot like the Siemens bt300 Mpeterson21 told us about.

    Hard to say because we haven't tried any of those 2 model
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    Didn't know that all option board where all on...

    Didn't know that all option board where all on board..
    Siemens are reliable?

    Will definitely look to get some more info on those drive..

    Our office use a lot of yaskawa a1000 easy to copy...
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    Favorite brand of vfd

    Hi

    What is your favorite brand of drive.

    Why?
  19. Replies
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    Low pressure is reverse operation and need to be...

    Low pressure is reverse operation and need to be open to show as good?
    NC contact might be for alarm
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    Is the VCCX2 bacnet ready or you still need a...

    Is the VCCX2 bacnet ready or you still need a fieldserver control in between.

    In the older style board a external comm board was needed
  21. Hi Augusto, Is it a 30hr chiller. Old...

    Hi Augusto,

    Is it a 30hr chiller.
    Old mechanical recip type chiller?
    In the manual the B stand for r134a

    You can find it by googling carrier 30hr.
    If you have access to a cell phone with...
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    Reclaim refrigerant that as migrated to the roof...

    Reclaim refrigerant that as migrated to the roof on a cold day?
  23. Thread: Not Sure Why

    by patpinet
    Replies
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    1,729

    Sure enough that for a heat pump. The guy didn't...

    Sure enough that for a heat pump. The guy didn't have biflow dryer so he decided to put in two standard dryer and just flipped one with the arrow pointing at the condensor
  24. Replies
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    Water temp will let's us see if he as some high...

    Water temp will let's us see if he as some high load on the evap (he got a high Suct sat temp)
    With high TD we could see if flow is good or not.

    Partial number lead only to partial or wrong...
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    Google is telling me that 38ak is a split...

    Google is telling me that 38ak is a split condensor. Not a chiller
    Is Google right? Just trying to figure out on what your working.
    How long of pipe do you have to the condensor.
    What is water...
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    Not yet this is only a small part of a bigger...

    Not yet this is only a small part of a bigger project.
    Should be done in May.
  27. One thing that I see Is the fan coil closest to...

    One thing that I see Is the fan coil closest to the supply is the last on the return. It make sense to "balance" the flow at each coil

    Why have they went so high with the return I don't know.
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    Thanks

    Thanks
  29. Replies
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    Open upc was factory installed. We want to do a...

    Open upc was factory installed.
    We want to do a integration from what I heard there is a automapping feature that grab 50 point.
    Is that right
  30. Replies
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    So now I have a carrier network tool

    We need to integrate a 30hx chiller thru bacnet thru a open upc module.Looking at some older post I see there's a automapping feature that need to be disabled.And I manually enable the point I want ...
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    Have any of you tested win 10 with all those...

    Have any of you tested win 10 with all those software from the manufacturer that make our life easier.
    Like trane techview.
    Vfd software
    Turbocor software
    Any other software you can think off....
  32. Thread: YORK YT

    by patpinet
    Replies
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    You got mail

    You got mail
  33. Replies
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    Get some pressure reading with gage and some...

    Get some pressure reading with gage and some temperature.
    It will help you and those who want to help you out.
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    As a rule of thumb you look for 2 to 2.4 gpm per...

    As a rule of thumb you look for 2 to 2.4 gpm per ton at the evap.

    Around 3 gpm per ton on the condensor.

    Regardless of the option it's just a standard.

    I did not found your evaporator code...
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    Why don't you go with a vfd. Easier for you,...

    Why don't you go with a vfd. Easier for you, customer might save on energy bill...
  36. Replies
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    You're probably on the right track if the...

    You're probably on the right track if the solenoid was sweating. Check if solenoid reversed. (arrow should point toward txv)
    Check voltage at solenoid it might be a voltage issue.
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    You will need to find what as been programmed in...

    You will need to find what as been programmed in the control board.
    You either will need a tool to connect to the board or see if you have a interface on site
    Btw you won't be able to connect if...
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    What brand or type of controls been installed...

    What brand or type of controls been installed into the aaon unit.( mcs, Wattmaster or other)?

    Seem like a commissioning issue.
    System where started to fast without a good adjustment.
    You can...
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    👍

    👍
  40. Replies
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    👍

    👍
  41. It's been close to 15 to 20 years that I haven't...

    It's been close to 15 to 20 years that I haven't seen a Carlin burner.
    Are you starting a collection of older oil burner? For a museum?
    :)
  42. Replies
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    A picture will tell us more.

    A picture will tell us more.
  43. Thread: YK vsd issue

    by patpinet
    Replies
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    Check your mail

    Check your mail
  44. Replies
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    Humidity in the air. Dry bulbs don't tell the...

    Humidity in the air.
    Dry bulbs don't tell the whole story.
    You need total enthalpy. So dry bulb and relative humidity.
  45. If you take a look at the manual you will se the...

    If you take a look at the manual you will se the complete procedure to test the transducer or go further if transducer is OK.
    Remove transducer from service fitting and validate that you have close...
  46. I believe I won't make that much of a difference....

    I believe I won't make that much of a difference.
    You need thicker armaflex when temperature difference between ambiant and line temp is high.
    Low temp refrigeration applications might be a good...
  47. Thread: York YCAS

    by patpinet
    Replies
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    628

    Your question is not a so easy question. What is...

    Your question is not a so easy question.
    What is the temp you're planning for at evap?

    The hard to predict condition will be outside temp.
    The problem that I see for now is if evap temp to high...
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    Thanks

    Thanks
  49. If you have multiple Evac with no common duct....

    If you have multiple Evac with no common duct.
    Maybe going with a heat recovery chiller and water coil(or glycol)
    Hard to say but it's a possibility that I think might work.
    All depend on...
  50. Thread: Carrier 19XRV

    by patpinet
    Replies
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    632

    Transfer it. Just I case you need it bring some...

    Transfer it.
    Just I case you need it bring some recovery tanks . You get the best of both and get to have a answer to your question as a bonus 😁
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