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  1. Replies
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    If you're going to go to all that trouble, why...

    If you're going to go to all that trouble, why not just use air cooled condensers? What I mean is, after the water softener is installed (with all its' added cost) wouldn't a business just be better...
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    Water cooled condensing in hard water areas

    I'm wondering...I know that water cooled condensing is much more efficient than air cooled (I can't quantify it, but that's what I've been taught). Anyway, I also know that in areas where the water...
  3. Thread: NH3 at markets

    by Iceneck
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    3,446

    Going out on a limb here, but i'm betting...

    Going out on a limb here, but i'm betting companies like Dupont will oppose use of NH3 for those very reasons.

    As far as R1234yf goes, if I worked for a car manufacturer I'd *love* a switch to...
  4. Thread: NH3 at markets

    by Iceneck
    Replies
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    3,446

    Just out of curiousity...if a rack lost 200lbs of...

    Just out of curiousity...if a rack lost 200lbs of NH3, how great a danger would that pose to people around the store? I know it's heavier than air, but have no perspective about how dangerous it...
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    I'm guessing the descaler won't damage the...

    I'm guessing the descaler won't damage the stainless because the steam generators are stainless...am I wrong?
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    I don't have as much experience as most other...

    I don't have as much experience as most other guys here, but...

    Isn't your suction pressure a little high? You should set it 7-10 degrees *cooler* that your walk in's set point. You should have a...
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    scale in steam table wells

    Anybody here know of a good chemical (and technique) for getting scale off steam table pans without damaging the stainless steel? I'm thinking of using rational "special descaler" and scrubbing with...
  8. Thread: NH3 at markets

    by Iceneck
    Replies
    18
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    3,446

    NH3 at markets

    I'm wondering how many here think ammonia will someday be used as a primary refrigerant in grocery stores? Obviously not for a direct x system, but as a primary to cool some secondary like glycol,...
  9. Replies
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    That's the thing...it makes it stick for me too...

    That's the thing...it makes it stick for me too and makes me actually understand what I'm doing, rather than be a parts changer. In the classes I've taken, it's always something like "o.k. poeple,...
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    Agreed, and will do so. :cheers:

    Agreed, and will do so. :cheers:
  11. Replies
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    I am sorry this thread devolved into what it has....

    I am sorry this thread devolved into what it has. It was my fault.

    So...let's get back to some good old fashioned reverse electrical/mechanical engineering. : )
  12. Replies
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    Yep, keep laughing at guys who are hungry to...

    Yep, keep laughing at guys who are hungry to learn. Keep laughing...
  13. Replies
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    No, it won't be tough to do. Because i'll know...

    No, it won't be tough to do. Because i'll know what i'm doing, and can do what I need to do in less time. And the company i work for will take your account once they see me work.
  14. Replies
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    Keep saying that when someone like me gets...

    Keep saying that when someone like me gets promoted over your a@@. :munching:
  15. Replies
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    It is exactly this kind of non sequitur, self...

    It is exactly this kind of non sequitur, self promoting drivel which makes me want to give up online discussion forums completely. But I don't, because there are people out there that want to learn...
  16. Replies
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    Itsiceman, no prob and I totally understand where...

    Itsiceman, no prob and I totally understand where you're coming from. It's just that, I have enough education and experience that it kind of rankles me being treated with kid gloves. But I know that...
  17. Replies
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    I was 70-80 feet away when I threw the switch. I...

    I was 70-80 feet away when I threw the switch. I got all my info from putting a video recorder in front of the compressor, my meter, and the pot. relay.

    I appreciate your concern, but I also...
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    It has taught me a lot... One thing I wish I...

    It has taught me a lot...

    One thing I wish I could to is vary the frequency of the power going to the compressor. But I don't have a vfd or the money for a vfd....I wonder if I could build...
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    I actually took the plastic housing off the...

    I actually took the plastic housing off the potential relay to get a better look at how it works. It's pretty simplistic. I even stuck a little stick in between the lifting assembly that connects...
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    It's way higher...like 440v...

    It's way higher...like 440v...
  21. Replies
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    When the unit was wired correctly it drew roughly...

    When the unit was wired correctly it drew roughly 4 amps on each leg of power. I experimented a little and disconnected the run cap from the circuit entirely (but kept the start cap). The compressor...
  22. Replies
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    potential relays

    I have a scrap tecumseh compressor, it's start cap and run cap, and the potential relay. I wired it up to 240v at my house and it runs fine (unit was abandoned during a remodel and I was allowed to...
  23. Replies
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    Cool videos of scroll compressor

    Don't know if this guy's videos have been posted before, but apparently he's a refrigeration mechanic from Australia who also runs a scrap metal business. He cuts open old compressors, accumulators,...
  24. Replies
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    Totally...my eyes were wide opened when I saw the...

    Totally...my eyes were wide opened when I saw the state of the wells for our cases when I first started...partially plugged up cond. drains and THICK slime growing on top. That's all changed now, but...
  25. Replies
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    Cleaning evap coils in display cases

    I'm wondering how often the refrigeration mechanics here recommend cleaning evap coils for display cases? Every time I've taken the back panel off to look at an evap coil in one of our cases it is...
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    Ah, I looked again and you're right. God, I hope...

    Ah, I looked again and you're right. God, I hope I will get these sooner or later...need to get the lingo down pat first, I guess. Knowing what "COM" meant in that situation, for ex...

    Thanks for...
  27. Replies
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    Here's the diagram....

    Here's the diagram. http://www.iceomatic.com/uploadedFiles/Shared_Content/Product_Content/Downloads/Service_Manuals/ICESERVICE910.pdf

    I'm interested in learning about the Low pressure initiate. If...
  28. Replies
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    Yes, the neutral (or common) wire. And it's 120...

    Yes, the neutral (or common) wire. And it's 120...
  29. Replies
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    Wiring diagrams

    I'm trying hard to get better at wiring diagrams. I'm using an ice machine at work to learn on, and the wiring diagram for it found online (ice o matic). One question that I have...is it common that...
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    Thanks again for all the help...I should post...

    Thanks again for all the help...I should post pics of our ice machines now. If only I could get the camera inside the transport tube(s)... :)
  31. Replies
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    Bunny, Thanks for the link to the Sporlan...

    Bunny,

    Thanks for the link to the Sporlan doc....great stuff!
  32. Replies
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    Pressure-Enthalpy charts

    I've spent a lot of time reading over the last 2 days learning how to use a Pressure-Enthalpy chart. I'm kinda proud to say I finally understand it (mostly). Then, at the end of the chapter which...
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    Is the "differential" sort of like a deadband...

    Is the "differential" sort of like a deadband setting, to keep the cond. fan motor from short cycling?
  34. Replies
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    Now it's time to put it on my AC! I figure I'll...

    Now it's time to put it on my AC! I figure I'll wrench it onto my manifold then connect the hose to the high side of the AC system. Take the c fan wire off the load side of the contactor and make it...
  35. Replies
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    I thought it was a fan cycling control, but now...

    I thought it was a fan cycling control, but now realize it's not. Also thought it might be a high pressure control...i.e., it would open the circuit when a high pressure setpoint was acheived. But it...
  36. Replies
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    Just did so and it fits....

    Just did so and it fits....
  37. Replies
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    It says P70AA-118...damn, i shoulda figured that...

    It says P70AA-118...damn, i shoulda figured that before i posted.:o
  38. Replies
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    I have both at work...I'm home now. But, I'd have...

    I have both at work...I'm home now. But, I'd have to find the male fitting for the flare connection...not sure what size it is. That's a great idea, though! Once I find the fitting, I could solder it...
  39. Replies
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    Refrigeration and Air conditioning Technology. I...

    Refrigeration and Air conditioning Technology. I have the 2009 ed. (at least I think it's 2009 ed).
  40. Replies
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    Johnson controls All Range

    I was given one of these http://cgproducts.johnsoncontrols.com/MET_PDF/125454.PDF by a refrigeration mechanic that I know and was told in so many words to "learn it inside and out, take it apart,...
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    Thanks for all the advice everybody and...

    Thanks for all the advice everybody and Icemeister, thanks for that vid. It was actually pretty informative.

    Damn, I knew there was going to be more too this than meets the eye. I was happy just...
  42. Replies
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    Cleaning ice machine(s)

    Tomorrow I'll be on ice machine cleaning duty. I've read a lot on here about how dirty they can be and how a lot of refrig. mechanics won't get ice in their drinks, etc. unless it's from a unit they...
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    Thanks for the recommendations...and I'm glad to...

    Thanks for the recommendations...and I'm glad to hear that even Phase Loss has to read now and then!

    In the meantime, I've discovered Sporlan's "Literature" section...some good stuff there.
  44. Replies
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    Book recommendations

    I'm wondering if anyone here has any favorite Refrigeration/HVAC texts (other than "Refrigeration and Air Conditioning Technology" and "Supermarket Refrigeration for HVAC Professionals")? I've got a...
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    That is hilarious!

    That is hilarious!
  46. Replies
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    Split suction, right?

    Split suction, right?
  47. Replies
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    Got it! Thanks....

    Got it! Thanks....
  48. Replies
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    Heat transfer is the way I do think of it (when...

    Heat transfer is the way I do think of it (when the refrigerant vaporizes, it takes in heat, and when it condenses, the heat is removed) but I thought...ahh, I don't know what I was thinking. I was...
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    Temp control question

    Something has been bugging me that I just can't understand, and my textbooks don't seem to address it. It may be a dumb question...

    Lets say we have a case that we want to keep at 38 degrees....
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    Phase Loss, If you saw the state of the motor...

    Phase Loss,

    If you saw the state of the motor "areas" at my store (we use protocols, so no motor room) you'd kiss me. Trust me, the departments have tried to store their S*@& in and around the...
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