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Type: Posts; User: Jettmac

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  1. Replies
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    Is the diff sufficient to flow to the case (is it...

    Is the diff sufficient to flow to the case (is it far away)?
  2. Replies
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    What I've done in the past when nitrogen testing...

    What I've done in the past when nitrogen testing small stuff was to leave the system as it would operate (no gauges, all caps on, valves closed), then pressurize hoses back to where I left the system...
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    What micron did it hold and for how long?

    What micron did it hold and for how long?
  4. Replies
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    Discharge air is unknown, that's a given using an...

    Discharge air is unknown, that's a given using an infared, but with regard to the oil temp, sure it would, it would be picking up heat from the air moving through the coil and giving it up to the...
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    P.S. do not change the compressor, it doesn't...

    P.S. do not change the compressor, it doesn't sound like the problem.
  6. Replies
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    8,129

    I know it's been touched on already, but you...

    I know it's been touched on already, but you cannot measure D/A with an infared gun, you're most likely getting ceiling temperature, fan blade, shroud... whatever but not D/A. You've got an SST low...
  7. Thread: testo 410-2

    by Jettmac
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    1,362

    Alnor velometer jr. is what I use. Used to use a...

    Alnor velometer jr. is what I use. Used to use a vane anemometer and it worked ok, it was just a bit flakey and I hate not being 100% sure of my measurements the first time.
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    fail safe sure, but the valves themselves are...

    fail safe sure, but the valves themselves are normally open, both of them CW and HW. CW valve is in the CW supply line and the HW valve is in the HW return line (lines to eah fan coil). My main...
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    Normally Open Normal?

    Took a look at a job today that one of our market accounts had done on their HVAC. They're using a chiller and multiple fan coil units, is it normal for guys to use normally open valves for the HW...
  10. Thread: Turboshed

    by Jettmac
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    2,089

    eat two cheeseburgers... or more, and lean into...

    eat two cheeseburgers... or more, and lean into that pump
  11. Thread: RSES

    by Jettmac
    Replies
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    758

    I've been wanting to for quite awhile, but the...

    I've been wanting to for quite awhile, but the chapter here doesn't seem to be active at all, and up here you have to wait 2 years before writing the CM exam.
  12. Thread: Oh boy..... :(

    by Jettmac
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    969

    start by moving the controller to eye level... lol

    start by moving the controller to eye level... lol
  13. Replies
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    This is a great point, I was going to add it...

    This is a great point, I was going to add it until I saw you already had it on there. I used to do kitchens and put 'aircraft' cable on both ends of the lines everytime.
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    abandon only ensures that all pumps turn on...

    abandon only ensures that all pumps turn on atleast once every... whatever you set it for. According to Emerson, enhanced suction should be smart enough to 'sense' an inefficient pump and stop...
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    Just a note, you don't have to delete and re add...

    Just a note, you don't have to delete and re add the enhanced suction group, you can force a 'relearn'. Off the top of my head I believe it's under inputs in the group, set to 'yes' and let it go,...
  16. Thread: Walk In cooler

    by Jettmac
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    966

    It shouldn't be an issue running the lines...

    It shouldn't be an issue running the lines outside, just insulate them, the issue is going to be the cond. unit with no low ambient controls at -24C. It's a waste of money to move a unit like this,...
  17. Thread: snowy top

    by Jettmac
    Replies
    8
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    662

    Probably never even gets to 15 minutes, it's just...

    Probably never even gets to 15 minutes, it's just fine and there if it needs it.
  18. Thread: tyler rack

    by Jettmac
    Replies
    9
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    735

    Cut out the DDR and replace with an A8 since you...

    Cut out the DDR and replace with an A8 since you have the opportunity, like jpsmith said, they're a better valve. I believe the most common way is to de-energize for defrost but it depends on the...
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    I love mine, just remember to warm it up

    I love mine, just remember to warm it up
  20. looks like costco... Most units at the local ones...

    looks like costco... Most units at the local ones here are within a few feet of skylights also
  21. Thread: air/acetylene

    by Jettmac
    Replies
    34
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    4,191

    Where does this info come from? I've always used...

    Where does this info come from? I've always used a 32 with my B tank without hesitation, used it twice this week to repipe some heat reclaim 2 5/8, and repair a leaking header on a condenser, also 2...
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    What a joke, makes me appriciate how good I have...

    What a joke, makes me appriciate how good I have it a little more.
  23. Replies
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    15-16* SH at each evap? why so high?

    15-16* SH at each evap? why so high?
  24. Replies
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    They seem low, check pressure at the compressor,...

    They seem low, check pressure at the compressor, unless there's a long distance between the evap and the cond unit it should get you close enough. your pressures are low, 200-225/55-60 would be...
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    What you've written makes sense to me, but I'm...

    What you've written makes sense to me, but I'm not 100% with how the valve works, does the RMCC not have control of the valve?
  26. Replies
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    I though only 6th and 7th were Baud Rate. What's...

    I though only 6th and 7th were Baud Rate. What's 8 for?
  27. Replies
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    I'm pretty sure they always have priority, I...

    I'm pretty sure they always have priority, I wonder who was there first on that job.
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    I don't know much about sprinklers but i know, up...

    I don't know much about sprinklers but i know, up here anyway, that they're only allowed to use dry bulb in freezers. Heat tape seems like sprinkler hackery to me...
  29. Thread: KOLD DRAFT

    by Jettmac
    Replies
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    2,585

    I installed one last summer, nothing but...

    I installed one last summer, nothing but problems, even had to replace the evap after a couple months and their electrical is the definition of 5 pounds of **** in a 2 pound bag, absolutely horrible...
  30. Thread: KOLD DRAFT

    by Jettmac
    Replies
    17
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    2,585

    I saw a couple new ones earlier this year... junk...

    I saw a couple new ones earlier this year... junk IMHO
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    Ultrasite is a great idea but it's pretty...

    Ultrasite is a great idea but it's pretty expensive just to use for one store. E2 FTW
  32. Thread: Air baffles

    by Jettmac
    Replies
    7
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    1,054

    They're to keep us busy cleaning cases at 11 at...

    They're to keep us busy cleaning cases at 11 at night
  33. Replies
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    i'd lean towards bad pump for sure, I haven't...

    i'd lean towards bad pump for sure, I haven't seen one of these in a long time, but their operating pressures should be very near any other s/c air cooled MT R134a unit. Maybe they misheard you and...
  34. Thread: Hussmann Racks

    by Jettmac
    Replies
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    3,844

    I have a couple stores with Hussman racks and...

    I have a couple stores with Hussman racks and surge receivers, usually 0 eyes on the receiver but around 20% liquid level on the controller. Just seems to be the way the Hussman racks are built,...
  35. it's not even worth fixing on the cheap, p/u a...

    it's not even worth fixing on the cheap, p/u a used box for >$50. i wouldn't even repair that for myself.
    Then again, I wouldn't drill holes in my freezer either.
  36. Your tape isn't holding anything in, it's empty.

    Your tape isn't holding anything in, it's empty.
  37. Replies
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    I recently got into Markets from light commercial...

    I recently got into Markets from light commercial also, 12+hr days are certainly a reality, I think I've had 1 8hr day since I made the switch... Have fun!
  38. Replies
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    That's hilarious

    That's hilarious
  39. Thread: High side leak

    by Jettmac
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    1,407

    Yeah, that's what I was driving at with my...

    Yeah, that's what I was driving at with my sarcastic ways 14.7psia=0psig
  40. Thread: High side leak

    by Jettmac
    Replies
    13
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    1,407

    Maybe my sarcastic side got the best of me there,...

    Maybe my sarcastic side got the best of me there, sorry, but the answer to your original question is a very, very, very basic one if you give it a second thought and read what you're asking. You had...
  41. Thread: High side leak

    by Jettmac
    Replies
    13
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    1,407

    There would've still been pressure in there,...

    There would've still been pressure in there, around 14.7psi is my guess. We only evacuate the high side on Tuesdays in March around here, so you'll be fine... Refrigerant rarely ever gets from the...
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    According to my Techumseh book.. AK9442E @ 77*F ...

    According to my Techumseh book.. AK9442E @ 77*F

    S-C 9-12
  43. Replies
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    yes, but after defrost without trap... Fans...

    yes, but after defrost without trap... Fans running, empty drain line...
  44. Replies
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    2,285

    It's mostly been said but, 1) Heat trace should...

    It's mostly been said but,
    1) Heat trace should be coiling around the outside of the drain line, use electrical tape at elbows and unions to ensure it doesn't touch itself (it can burn out if it's...
  45. Replies
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    I had an old TBB 4 today where a previous tech...

    I had an old TBB 4 today where a previous tech had cut out the cap tube and installed a TEV and 1/4" line, no receiver though, and no sight glass either. The owner tried to move it and tore the...
  46. Replies
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    1,310

    Check out the new Hoshizaki undercounters. you...

    Check out the new Hoshizaki undercounters. you can remove the entire unit, including evap from the box and wheel it to wherever is conventient to work on it.

    Hoshi FTW
  47. Replies
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    It's a very general rule, the degrees/turn varies...

    It's a very general rule, the degrees/turn varies by valve, refrigerant and evap temp. I used to have a Sporlan PT chart that had their degrees/turn by valve type right on it, but don't know where it...
  48. Replies
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    Sorry I kind of ran that together. With regard to...

    Sorry I kind of ran that together. With regard to the oil, I just put back what comes out, good enough.

    With regard to your high head, is it possible that when the drier was installed that the...
  49. Replies
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    That's your best bet. Is it at all possible that...

    That's your best bet. Is it at all possible that you partially filled the pipe on either end of the drier? or where you pinched it off for the cap tube?
    Like I think someone else already said, take...
  50. Thread: 409A Cooler

    by Jettmac
    Replies
    26
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    2,569

    pt chart won't help with operating pressures...

    it sure will... if you can use it. with a 40* box and 60* ambient you should be around 140-150/20.
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