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Type: Posts; User: jayguy

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  1. Replies
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    units. Units. UNITS! UNITS! 60 Nm = 44 ft-lbs...

    units. Units. UNITS! UNITS!

    60 Nm = 44 ft-lbs
    90 Nm = 66 ft-lbs

    i HATE IT when people don't use units! and this thread shows the reason why.

    i have only had 1 head leak when i torqued them...
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    Liquid Line Solenoids on any system are an...

    Liquid Line Solenoids on any system are an acceptable idea and work well...maybe a little overkill in some situations but closing the solenoid and pumping down is a great idea. the problem comes from...
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    Differential flow switches suck. The piping gets...

    Differential flow switches suck. The piping gets corroded internally because there isn’t any flow and thus no chemicals for pipe protection. Check to see if the switches setpoint is too close to the...
  4. Thread: YLAA R454B

    by jayguy
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    777

    the "new" designation of A2L is new for all of...

    the "new" designation of A2L is new for all of us. we are just starting to see some of these refrigerants here in the states. the use of it indoors is especially concerning and has some new...
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    Seems like your nose is a bit too high in the air.

    Seems like your nose is a bit too high in the air.
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    Well then…

    Well then…
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    I am pretty sure that apprentices are cordless.

    I am pretty sure that apprentices are cordless.
  8. Thread: Tower Approach

    by jayguy
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    622

    You could also just have a low airflow situation...

    You could also just have a low airflow situation based on a slow VFD and low load.
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    Calling it “F22” really puts an old date on it!

    Calling it “F22” really puts an old date on it!
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    I replied in your other thread.

    I replied in your other thread.
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    I replied in your other thread.

    I replied in your other thread.
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    Same. Never had an issue.

    Same. Never had an issue.
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    Not that I am aware of

    Not that I am aware of
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    Most of your BAS techs and training are going to...

    Most of your BAS techs and training are going to be in a particular brand and it will probably be mostly software….not quite the board level stuff like you are thinking about. You would probably need...
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    Are you looking to use your knowledge for good or...

    Are you looking to use your knowledge for good or for evil?
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    Safety first. He isn’t standing on the cap!

    Safety first. He isn’t standing on the cap!
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    on my phone, looks legit. on my laptop, looks...

    on my phone, looks legit. on my laptop, looks quite photoshopped as well.
  18. Replies
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    It’s an air cooled chiller now!

    It’s an air cooled chiller now!
  19. Thread: Ycav0157

    by jayguy
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    attached is a service information letter...

    attached is a service information letter detailing some issues and how to resolve them.

    836722
  20. Do you have 2 accounts? Is this the same person...

    Do you have 2 accounts? Is this the same person as Andrew28?
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    Recommend to the customer to have them repaint it...

    Recommend to the customer to have them repaint it the color of the house so it doesn’t look so bad. I would not replace them if there isn’t any reason to
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    It’s just a flesh wound.

    It’s just a flesh wound.
  23. I have used electric heaters when I engineered...

    I have used electric heaters when I engineered humidity sensitive environments (to bring temp up or to drop humidity). But I never installed it on the suction line. It was just a small electric...
  24. About 5 years ago, I remember a lot of the...

    About 5 years ago, I remember a lot of the Discharge Pressure Transducers showing zero. Eventually, they would read but it took forever for them and that meant that the condenser fans would come on...
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    the chiller microboard calls for the contactors...

    the chiller microboard calls for the contactors to pull in and feed the drive. power issues can cause the fuses to fail but so can bad wiring and a bad drive. take your time and investigate properly.
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    You can’t. If the sensors are off, buy a new...

    You can’t. If the sensors are off, buy a new sensor.
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    Call your local JCI office.

    Call your local JCI office.
  28. the fault happens at 65 psid between the Oil...

    the fault happens at 65 psid between the Oil Pressure and the Discharge Pressure...essentially, a plugged oil filter. but since you sometimes see it working well below the 65 psid (ignored for the...
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    idk. according to comforsite, there are 3 short...

    idk. according to comforsite, there are 3 short ones on the right (with wires coming from the right) and 3 long ones on the left. mine is "short" according to the pictures. not sure the real length.
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    Looks like it is a LUG00007? not sure why i...

    Looks like it is a LUG00007? not sure why i couldn't find it before.
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    sorry, the compressor number is:...

    sorry, the compressor number is: CHHB100PKA0R119AHNN
    M: RTAA200GYT01A3C0BPN

    Compressor Serial: N15G02366
    Compressor Part: COM04462
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    Trane Part Number needed

    i have tried Comfort Site and my local Trane Parts can't find this part. Any help would be appreciated. 100 Ton Compressor, 200 VAC. Compressor Model: CHHP100PKA0R119AHNN. I have the terminal...
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    I don’t like to give out passwords in the open...

    I don’t like to give out passwords in the open forum. You do need to ask yourself about that contractor: is he being a dick or is he protecting you and the chiller? Passwords are there for a reason....
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    the tape job gets an A+!!

    the tape job gets an A+!!
  35. Rotor bar is a classic sign as well as oil...

    Rotor bar is a classic sign as well as oil pressure fluctuations...but not if you have pressure transducers...the old gages worked well.

    can you post the report or what the dB was for the rotor...
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    In the middle of the night, come in and repipe...

    In the middle of the night, come in and repipe the bean counters office AC to the oldest and least reliable chiller. Let them know their offices will be curtailed first when you run out of tonnage.
  37. Thread: WTF

    by jayguy
    Replies
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    1,363

    I like the guy in the 3rd photo.... Sparky...

    I like the guy in the 3rd photo....

    Sparky Foreman: "Hey boss. All we did was go to lunch. When we came back, this piping was installed. Now we can't close the door."
    Sparky Foreman Boss: "Uh...
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    Now that I think about it more, I would try to...

    Now that I think about it more, I would try to get a refrigerant sample or replace the charge altogether. If that refrigerant is wet, I would hate to put new refrigerant right on top of it.
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    no such thing as a time based overhaul. maybe...

    no such thing as a time based overhaul. maybe many decades ago that was a thing. today, we have oil and refrigerant analysis, vibration analysis, trending purges, logs, etc.

    as for how long before...
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    this thread is 11 years old. also, there isn't an...

    this thread is 11 years old. also, there isn't an inverter module on these chillers unless you are thinking about the board that controls the fans.

    either way, start a new thread.
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    plan on stocking up on filters. it may have a lot...

    plan on stocking up on filters. it may have a lot of rust in it depending on where the leaks are. i would highly recommend cleaning out he oil sump and rebuilding the 1st stage vane arm at the very...
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    I would believe that they would stay the same,...

    I would believe that they would stay the same, but I really dont know.
  43. Thread: YMC2 VFD Issues

    by jayguy
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    They did install them for free on all the...

    They did install them for free on all the chillers…the next round of sensors that got missed during the manufacturing transition is about to come out. And I am not really at liberty to discuss the...
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    I totally get all of that. I used to work in...

    I totally get all of that. I used to work in wholesale. If you could “get by” with a more universal part, that mean more turns and earns, fewer parts to stock…all of that is money sitting on the...
  45. Thread: YMC2 VFD Issues

    by jayguy
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    419

    Overheating of the drive at shutdown is very...

    Overheating of the drive at shutdown is very unlikely the cause of an explosion…but I suppose it could happen. They need to have the Smart Sensor System installed. It is basically a smoke detector...
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    The tube length is 14 feet. i don't know what...

    The tube length is 14 feet. i don't know what tube thickness is in the tubes. there are many choices (i typically see 0.025" wall thickness but it could be anywhere from 0.025" to 0.035"). you would...
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    i am sure that they will tell you, they saved...

    i am sure that they will tell you, they saved millions of dollars.
  48. Replies
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    there is a service bulletin for the CTS/WTS51...

    there is a service bulletin for the CTS/WTS51 series 400V compressors "only". it states that they want you to replace compressor if there is a failure and that the failure usually happens in the...
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    has any of the compressors in that circuit been...

    has any of the compressors in that circuit been changed or upgraded? there are some differences in the oil charge values with the new compressors that Bitzer came out with.
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    40,110# operating weight (no refrigerant, oil,...

    40,110# operating weight (no refrigerant, oil, water or motor weight), thats with a J2 compressor.
    1092 evap tubes
    1627 cond tubes
    motor is 7300#

    University of Nebraska, 2000 tons performance,...
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