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Type: Posts; User: jayguy

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  1. Replies
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    HEAT and TEMPERATURE are 2 different things. The...

    HEAT and TEMPERATURE are 2 different things. The amount of HEAT (BTUH) added to the airstream is constant in an electric heat application.

    The temperature rise will vary as the CFM changes. More...
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    Only do 1 circuit at a time.

    Only do 1 circuit at a time.
  3. Replies
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    With the exception of no one wanting to carry the...

    With the exception of no one wanting to carry the red gage oil and it being a little cumbersome to carry up a 40' ladder....I miss my Dwyer. Nobody ever questioned it. Positive pressure, negative...
  4. Thread: Rawal

    by jayguy
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    445

    That is not accurate. Sizing to that low of a...

    That is not accurate. Sizing to that low of a capacity percentage would not accomplish much in most cases.

    I should add that the sizing requirements should be of the smallest stage or the largest...
  5. Thread: subcooling

    by jayguy
    Replies
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    737

    Generally speaking, you are correct. 0F liquid...

    Generally speaking, you are correct. 0F liquid subcooling (but all liquid) and 0F suction superheat (but all vapor) is the most efficient way to run a system. The problem stems from the fact that as...
  6. Thread: subcooling

    by jayguy
    Replies
    35
    Views
    737

    Generically, more subcooling makes a more...

    Generically, more subcooling makes a more efficient system, however, only if you can get it for free or very low cost. Typically, it costs more money (energy) to get that extra subcooling than it...
  7. Thread: Rawal

    by jayguy
    Replies
    14
    Views
    445

    I haven't used a Rawal before. I always calculate...

    I haven't used a Rawal before. I always calculate my own loads and perform my own selection of part numbers based on the application. So can't comment on the brand, but to me they are a widget/part...
  8. Replies
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    1,406

    Hundreds? A few years ago, the company I worked...

    Hundreds? A few years ago, the company I worked for found a chiller that flooded and quoted $125,000 for repair/overhaul. We finished up with about $150,000 in costs. Customer got billed $125,000.
    ...
  9. Thread: Hot loop

    by jayguy
    Replies
    8
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    282

    I just came across a chilled water system at...

    I just came across a chilled water system at 179.5F. Pump on 24/7 to keep the loop from freezing. They have ruined the chillers evaporator barrel and don't even realize it. I mentioned it, but I only...
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    1,406

    NICE!

    NICE!
  11. Replies
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    1,406

    i have heard it said that a happy customer will...

    i have heard it said that a happy customer will tell 5 friends...an angry customer will tell 25 friends.
  12. pretty close to the wall...i hope you don't have...

    pretty close to the wall...i hope you don't have to change any compressors anytime soon! it looks similar to the RTWD...they are a nice chiller.
  13. Replies
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    1,406

    It is not always your fault, but it may be your...

    It is not always your fault, but it may be your responsibility.

    Tell the customer the story and give them half the difference back. It's not your unit but you feel like you should have known...
  14. Carel told me they automatically shut down at 30...

    Carel told me they automatically shut down at 30 VAC. Like I said, I don't know if Trane has adopted this feature or not.
  15. What EXACTLY is your low voltage running? I have...

    What EXACTLY is your low voltage running? I have not heard of this before on a Trane unit, but I have heard of it before on a Carel. I high running low side voltage will shut the board off to protect...
  16. Replies
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    162

    When I see cooked transformers, I check sizing...

    When I see cooked transformers, I check sizing and look for power harmonics.
  17. Replies
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    294

    You need to find out WHAT is so bad about...

    You need to find out WHAT is so bad about yours...according to that other tech.

    By the cut sheet, most things are the same between the 2 meters except Full Scale Accuracy and depending on the...
  18. Replies
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    162

    If the primary is burning up, put an inline fuse...

    If the primary is burning up, put an inline fuse on the primary and see what happens.
  19. Adding that much pressure drop most likely will...

    Adding that much pressure drop most likely will change the CFM quite a bit, however, you need to decide if that is a good thing or not. Maybe your system was oversized to begin with and adding the...
  20. Thread: pay scale

    by jayguy
    Replies
    39
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    1,815

    I have heard that "medical" can be $300-400 per...

    I have heard that "medical" can be $300-400 per month.
  21. Thread: pay scale

    by jayguy
    Replies
    39
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    1,815

    Pay is what it is when you are new. From the...

    Pay is what it is when you are new. From the sounds of it, you are very new. You may be a very fast learner and very capable, but you are new. Work your ass off and then after 1 year, talk to them...
  22. Replies
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    1,354

    I see how it's built now....that sucks worse than...

    I see how it's built now....that sucks worse than the suckage I originally thought you had!
  23. Replies
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    1,354

    You wouldn't be repiping several thousand feet of...

    You wouldn't be repiping several thousand feet of hot gas line....just move it from the suction line to the evaporator line. And the hot gas line would move from the compressor to the oil separator....
  24. Replies
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    I was doing an overhaul on an 800 ton chiller...

    I was doing an overhaul on an 800 ton chiller (that was 500 tons oversized) and saw all of those 2.5 gallon trane oil buckets lined up against the wall. 10 or 11 of them. I recommended that we...
  25. Replies
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    1,354

    I love jobs like this! Makes you look like a hero...

    I love jobs like this! Makes you look like a hero and all you have to do is follow the book.
  26. Replies
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    1,354

    I think the focus on the oil separator is a bit...

    I think the focus on the oil separator is a bit premature. I would focus on the piping and proper evaporator control first. No matter what kind or size oil separator you put in there, if you start...
  27. Thread: Ethics policies

    by jayguy
    Replies
    17
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    575

    No. I don't know how the quotes came in. I doubt...

    No. I don't know how the quotes came in. I doubt there was a lot of difference. It was just funny how all of this transpired at the same time. I found this out from an employee of theirs right after...
  28. Thread: Ethics policies

    by jayguy
    Replies
    17
    Views
    575

    Ethics policies

    this could be a touchy subject, but does your company have an ethics policy? do they follow it? i am not looking for specifics or to have anyone trash the company they work for. just curious how many...
  29. Replies
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    1,354

    so, lots of floodback is fun. no wonder they went...

    so, lots of floodback is fun. no wonder they went through all of those compressors!
  30. Replies
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    272

    never trust installers...that is where i would...

    never trust installers...that is where i would start troubleshooting. i don't care what anyone else says, even if they are a reputable company and there were 30 other techs there before me....i get...
  31. Replies
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    1,354

    the smallest 540RA9 solenoid valve is rated at...

    the smallest 540RA9 solenoid valve is rated at 19.0 tons at 2 psid (R22)...you could probaby get away with a 200RB7 solenoid valve rated at 15.6 tons at 3 psid, however, with such a light load as you...
  32. Replies
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    Sizing liquid line solenoids, TXV's, piping, etc...

    Sizing liquid line solenoids, TXV's, piping, etc is much more complicated than it seems at first. I think you already hit the nail on the head. Low loads equal low pressure drops....sounds like you...
  33. Replies
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    While I don't work on Carriers much, I have only...

    While I don't work on Carriers much, I have only come across 1 drive (factory mounted or not) that was ever setup correctly. There has always been some setting that was off. Most startup guys think...
  34. Replies
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    Amen. Supposed to be -30 to -50 F windchills next...

    Amen. Supposed to be -30 to -50 F windchills next week. That sucks...but I will take it over a homeowner everyday. A lot of resi guys look to the commercial guys and think "WOW, I wish I could do...
  35. Thread: Holiday Pay

    by jayguy
    Replies
    62
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    2,396

    As I understand it, this is the way the federal...

    As I understand it, this is the way the federal law is stated. Certain exceptions may apply to different industries (I believe this law does not apply to the farming industry). Obviously, state,...
  36. Thread: Holiday Pay

    by jayguy
    Replies
    62
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    2,396

    It was more of a general observation to the...

    It was more of a general observation to the general audience.
  37. Thread: Holiday Pay

    by jayguy
    Replies
    62
    Views
    2,396

    Most large companies don't know how the service...

    Most large companies don't know how the service world works. The service world works different than most other trades in dispatch and contract worlds too. It is a constant struggle.

    Either go to a...
  38. Replies
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    What do you plan on replacing?

    What do you plan on replacing?
  39. Replies
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    i have run across several jobs where they spec'd...

    i have run across several jobs where they spec'd the largest motor allowed for that model because they weren't given an airflow design criteria other than '75 ton rooftop'.

    i ran across a 40 HP...
  40. Replies
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    are you going to need all 30 hp? maybe you will...

    are you going to need all 30 hp? maybe you will only need 20 hp and all will be ok.
  41. Amen!

    Amen!
  42. Thread: Holiday Pay

    by jayguy
    Replies
    62
    Views
    2,396

    I get paid OT for anything over 8 hours in a...

    I get paid OT for anything over 8 hours in a day...they are charging for OT and so I get paid OT. Double time on Sundays and holidays. Standby pay only if you are on-call. No paid holidays unless I...
  43. That IS hot gas bypass. It's not GOOD hot gas...

    That IS hot gas bypass. It's not GOOD hot gas bypass, but it is hot gas bypass. Piping it after the TXV offers so many more advantages, removes a bunch of extra valves, creates ease of ...
  44. Replies
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    570

    unloaders are used to cut capacity while...

    unloaders are used to cut capacity while running....not for unloading just before you shut the compressor off.

    let's say the discharge setpoint was 55F...at about 52F, you activate the unloader....
  45. Replies
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    570

    X2. There are too many different types of...

    X2. There are too many different types of unloaders and too many situations of when to specify 1 type over another. Generally, you use them for unloading or when you run very close to the freeze...
  46. Replies
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    346

    Most (if not all) of the old cast iron...

    Most (if not all) of the old cast iron compressors had relief valves inside from the discharge to the suction in a case of "too high of a pressure differential" situation. I am not certain that ALL...
  47. Replies
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    on smaller pieces of equipment, string and...

    on smaller pieces of equipment, string and bendable aluminum angle brackets would probably work ok...especially when the belt hawg won't fit in between the pulleys, however, if the belt hawg fits, it...
  48. Replies
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    1,223

    Belt Hawg....nothing better. Once you learn how...

    Belt Hawg....nothing better. Once you learn how to align properly, you see the faults in everything else.
  49. Thread: silencer mishap

    by jayguy
    Replies
    7
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    620

    Sneaky-Pete!!!

    Sneaky-Pete!!!
  50. Thread: silencer mishap

    by jayguy
    Replies
    7
    Views
    620

    I was just thinking of him the other day....I was...

    I was just thinking of him the other day....I was wondering if he was still there.
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