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  1. Replies
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    Honeywell and others are developing next...

    Honeywell and others are developing next generation refrigerants that have lower GWP. They are HFO's (hydro-fluoro-olefins). Potential replacements for 404a are currently know as N-20 and N-40. These...
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    Curious if you resolved the problem...

    Curious if you resolved the problem...
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    Yup, any time I see an iced evaporator, first...

    Yup, any time I see an iced evaporator, first thing I do is mark the clock. Then continue with preliminary inspection and gathering model/serial info.

    I've definitely seen dtfd's cause the...
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    Does suction line have a crankcase pressure...

    Does suction line have a crankcase pressure regulator? Not common on walk-ins, but I have seen them.

    But yeah, sounds like the other tech front seated the suction service valve, then opened it...
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    2,289

    How high do the discharge and liquid line...

    How high do the discharge and liquid line pressure get during pumpdown? Do you trust the HPC's?

    Also, is it possible that the blowouts are not happening at the same time, but that one unit fails...
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    This particular one is thru the board.. no...

    This particular one is thru the board.. no contactor.
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    Thanks. Good info.

    Thanks. Good info.
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    Yes I tore down the "failed" compressor. The oil...

    Yes I tore down the "failed" compressor. The oil was sludge and crankshaft was scored due to clogged oil journals. Evidently it had a history of running with a plugged condenser.

    I was more...
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    Interesting. Any other info or elaboration? Such...

    Interesting. Any other info or elaboration? Such as how to diagnose the board and it's components, or where to get replacement cheesy relays for this board? If I'm not mistaken they seem obsolete,...
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    Brings back memories!:whistle::grin2::angel:

    Brings back memories!:whistle::grin2::angel:
  11. Replies
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    Hey Garya505, is Nunzio's pizza still around?...

    Hey Garya505, is Nunzio's pizza still around? I've been gone for several years, but their pepperoni with green chile was the best pizza back in the day. I used to get slices of Dion's for 25 for...
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    Ah my home town. Go to Garduno's and get the...

    Ah my home town. Go to Garduno's and get the chile relleno and tamale. Red on the tamale, green on the relleno. Nothing wrong with little anita's. Good huevos.

    To do: take the tram up to the top...
  13. That's guessing. You should figure out why the...

    That's guessing. You should figure out why the start winding is pulling current after start up.
  14. Reachin = 20 td. Walkin = 10 td.

    Reachin = 20 td. Walkin = 10 td.
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    Never mind... I got it. Interesting though;...

    Never mind... I got it.

    Interesting though; no wear on any bearing surfaces, rod/crankshaft surfaces, cylinder walls or pistons. But there is massive wear on the ends of one wristpin where it...
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    I'm resurrecting this old thread in hopes of...

    I'm resurrecting this old thread in hopes of getting the attention of someone (craig1, vtp?) that can help...

    I haven't had a chance to attend a Copeland tear down session yet, but I'd like to dig...
  17. Thread: w/i

    by mmmdave
    Replies
    43
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    2,819

    It shouldn't be so much work to understand your...

    It shouldn't be so much work to understand your question. If you want our help, please take the effort to present your data in a clear manner. There are some really smart people on here and they are...
  18. Thread: Help

    by mmmdave
    Replies
    14
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    966

    How fast is fast enough?

    How fast is fast enough?
  19. Replies
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    Never mind. Traced it to a wire/connector running...

    Never mind. Traced it to a wire/connector running in the cabinet wall that had come loose because only about a half millimeter of insulation was stripped off the wire in the factory... in case anyone...
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    Delfield rif defrost

    Working on a delfield reachin freezer model F2FH. Not defrosting.

    Verified: heater works, defrost relay works, timer motor and internal contacts ok, and jumping out termination tstat. No voltage...
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    Those pressures look ok. You'll want to get a SCT...

    Those pressures look ok. You'll want to get a SCT that's 25-30 over ambient, and evaporator temp 10 degrees below box temp. Shoot for a SH of 4-6. SC doesn't mean much assuming the system has a...
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    I've had some luck tapping the grids (carefully)...

    I've had some luck tapping the grids (carefully) back into place, where they sometimes stay for quite a while. Like Codgy said, it's just to nurse a little more life out of the machine.
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    Your head pressure should be about 40# lower. Is...

    Your head pressure should be about 40# lower. Is the condenser clean ALL the way through? Fans operating correctly?
  24. Thread: defrost timer

    by mmmdave
    Replies
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    551

    Wise words. :yes:

    Wise words. :yes:
  25. Thread: defrost timer

    by mmmdave
    Replies
    5
    Views
    551

    On resi's, I'd say start relays (pepper shakers)...

    On resi's, I'd say start relays (pepper shakers) are the most common, followed by leaks. I don't see that many timers. But commercial,,, that's a different story with the unreliable defrost timers...
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