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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?
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    7,122

    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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    7,122

    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
    Replies
    5
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    1,292

    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
    Replies
    12
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    1,932

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

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

    by Jettmac
    Replies
    5
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    710

    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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    867

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

    start by moving the controller to eye level... lol
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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
    Replies
    10
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    877

    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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    629

    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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    671

    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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    3,940

    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.
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    15-16* SH at each evap? why so high?

    15-16* SH at each evap? why so high?
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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?
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