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  1. Replies
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    What kind of pumping system? Maybe going below...

    What kind of pumping system? Maybe going below minimum flow once the load satisfies (variable primary system not setup correctly). System supply pressure shoot up because all of the CHW valves closed...
  2. No need to run the pumps and the fact that the...

    No need to run the pumps and the fact that the screen wasn't working is irrelevant. The liquid refrigerant is always removed first. Then vapor is removed, stopping at the freezing point to make sure...
  3. Make sure the flow switch opens at minimum evap...

    Make sure the flow switch opens at minimum evap flow, sounds like a variable primary system that's not setup correctly.
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    https://en.wikipedia.org/wiki/Shading_coil

    https://en.wikipedia.org/wiki/Shading_coil
  5. Replies
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    What were the alarms? Sure it wasn’t running in a...

    What were the alarms? Sure it wasn’t running in a surge condition or getting liquid in the compressor?
  6. Replies
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    What book you need is going to depend on what...

    What book you need is going to depend on what style compressor you have. Kingsbury, REB, frame size, etc
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    What did you replace exactly? If your getting the...

    What did you replace exactly? If your getting the right voltage and the LEDs flash I would say the serial driver is good. I suspect you did not assemble everything correctly. Did you replace the IGV...
  8. Replies
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    With it jumped out, what's the evaporator delta...

    With it jumped out, what's the evaporator delta T? Are you able to check the flow rate at the pump?
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    I have had a similar issue but it would open when...

    I have had a similar issue but it would open when the compressor shut off. Turned out we were right on the threshold of enough flow. I would check the inlet strainer and try to increase flow.
  10. I'm wondering the same thing. Just an FYI, there...

    I'm wondering the same thing. Just an FYI, there is a fuse on the Kiltech right where the 24VDC power supply plugs in.
  11. Replies
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    There should be test points on the logic board to...

    There should be test points on the logic board to check the various onboard power supplies. Sounds like a component is pulling down one of these voltages, possibly one of the heat sink thermistors?
  12. Replies
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    Yep, have had to replace just about every fan on...

    Yep, have had to replace just about every fan on one RTAE. According to Trane the bearing failures are due to imbalanced fan blades.
  13. Replies
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    Yep, what he said. Hopefully the machine was...

    Yep, what he said. Hopefully the machine was evacuated/dehydrated properly. Is the purge pumping out?
  14. There is nothing to bind on the flow switch...

    There is nothing to bind on the flow switch itself, it either works or it doesn’t. The input module is what you’ll need to bind. Also “evaporator water flow too low” is not caused by the flow switch....
  15. Replies
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    Find out where the UA local is near you and see...

    Find out where the UA local is near you and see what it takes to apply for an apprenticeship.
  16. Replies
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    Check the staging valve. On a WMC it’s piped...

    Check the staging valve. On a WMC it’s piped right before the discharge check on the compressor side.
  17. Replies
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    I'm 33 and in really good shape and there are...

    I'm 33 and in really good shape and there are days all I can do is sit on the couch after work. And like someone said before, there is a reason the smart ones retire before 60.
  18. Replies
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    Where are you located? Like someone else said,...

    Where are you located? Like someone else said, the UA is the way to go and will open up opportunities for a rewarding and lucrative career.
  19. Yeah bet it's overcharged. Pull 50 pounds out and...

    Yeah bet it's overcharged. Pull 50 pounds out and see what she does. If it was charged to nameplate rather than simply putting the gas back in, it's overcharged.
  20. Once you build a reputation that’s easily...

    Once you build a reputation that’s easily negotiated.
  21. Replies
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    Yep sounds like the second compressor is surging....

    Yep sounds like the second compressor is surging. Need to figure out why.
  22. Replies
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    $90 is really high, maybe for a foreman or...

    $90 is really high, maybe for a foreman or service manager. But yes $60+ is the going rate for journeymen.
  23. Replies
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    Wanna impress your boss? Find the return air and...

    Wanna impress your boss? Find the return air and supply air enthalpies. Write these down. Next, measure the TES, or total external static pressure. Once you have that, reference the OEMs literature...
  24. Replies
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    You have to narrow down which component is the...

    You have to narrow down which component is the problem by a process of elimination.
  25. Replies
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    I use the B&G SystemSyzer mobile app. Can easily...

    I use the B&G SystemSyzer mobile app. Can easily find GPM if you have design flow and head.
  26. Unbind the current fault input and then bind the...

    Unbind the current fault input and then bind the one you want to use
  27. I would try to calibrate it first....

    I would try to calibrate it first. https://docs.johnsoncontrols.com/chillers/viewer/document/PF4UVGmhYrMgBWZPWVI5Mg
  28. Replies
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    Not sure how my company is going to handle it...

    Not sure how my company is going to handle it yet. We have quite a few hospitals, data centers, etc that we take care of.
  29. Replies
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    I always evacuate the recovery tanks to make sure...

    I always evacuate the recovery tanks to make sure they are tight and moisture free. If possible I like to flow cold water through one of the vessels so the liquid collects there. Then push-pull the...
  30. Replies
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    Who cares...

    Who cares...
  31. Replies
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    https://docs.johnsoncontrols.com/chillers/viewer/d...

    https://docs.johnsoncontrols.com/chillers/viewer/document/Mebq18H_sp0dvUurEZLVfA
  32. Replies
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    And they also recommend using their cleaner to...

    And they also recommend using their cleaner to flush the coolant loop before adding the new light blue stuff.
  33. Seems low for San Diego..

    Seems low for San Diego..
  34. Replies
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    Whats wrong with it? If your not too far we can...

    Whats wrong with it? If your not too far we can come rebuild it for you. :grin2:
  35. Replies
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    Vanes at 0%?

    Vanes at 0%?
  36. Replies
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    Thats absolute pressure. If your flow is right,...

    Thats absolute pressure. If your flow is right, the tubes are fouled.

    Sent from my SM-P550 using Tapatalk
  37. Replies
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    Discharge temperature - saturated condensing...

    Discharge temperature - saturated condensing temperature = discharge superheat

    Sent from my SM-P550 using Tapatalk
  38. Thread: Daikin AGZ

    by nutradesman
    Replies
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    1,022

    Just another chiller moving heat from one place...

    Just another chiller moving heat from one place to another..

    Sent from my E6810 using Tapatalk
  39. Replies
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    Please explain the surge caused by low condenser...

    Please explain the surge caused by low condenser water temp? Unless you are referring to a low load stall due to insufficent gas velocity.

    Sent from my SM-P550 using Tapatalk
  40. Replies
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    Is your oil heater working? Sent from my...

    Is your oil heater working?

    Sent from my SM-P550 using Tapatalk
  41. Replies
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    Seems like Carrier uses strainer and filter...

    Seems like Carrier uses strainer and filter interchangably. Did you weigh the charge? Is there refrigerant in your oil?

    Could be internal compressor issue.

    Sent from my SM-P550 using Tapatalk
  42. Replies
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    Autotransformer? Here's what I got.798711 Sent...

    Autotransformer? Here's what I got.798711

    Sent from my SM-P550 using Tapatalk
  43. Replies
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    Yeah try adding some gas and see what happens....

    Yeah try adding some gas and see what happens. Crankcase heaters working? How low does the suction get? Cooler could be oil logged.
  44. Replies
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    If you can get a job at Trane it won't be long...

    If you can get a job at Trane it won't be long before your making more than the engineers

    Sent from my SM-G900V using Tapatalk
  45. Replies
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    Need to know algebra and fractions Sent from...

    Need to know algebra and fractions

    Sent from my SM-G900V using Tapatalk
  46. When in doubt double flare it.

    When in doubt double flare it.
  47. Replies
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    VRF systems can compete with 500+ ton...

    VRF systems can compete with 500+ ton centrifugals in kw/ton?

    Sent from my SM-G900V using Tapatalk
  48. BTU/hr = 500xGPMx∆T ∆T=16.73 Sent from my...

    BTU/hr = 500xGPMx∆T ∆T=16.73

    Sent from my SM-G900V using Tapatalk
  49. Replies
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    Decreases by a factor of 3? Sent from my...

    Decreases by a factor of 3?

    Sent from my SM-G900V using Tapatalk
  50. Replies
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    I would say joining a union is the next step. ...

    I would say joining a union is the next step.

    Sent from my SM-G900V using Tapatalk
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