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Type: Posts; User: kooltek

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  1. Replies
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    This is a closed loop. The expansion tank does...

    This is a closed loop. The expansion tank does not show a level in the glass, but it is definitly no full. When the system was reno'd in 3/12 there was just enough glycol to fill to the roof...
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    pump pressure rising

    I have a compressor oil cooling system for 6 shell and tube HX using a pumped ethylene loop in one of our roof mounted evap. condensers. The condensers are new, installed 3/12. In 11/12 the pressure...
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    Job Opportunities in Arizona

    Hi Guys. Been seriously thinking about relocating to Arizona. My wife loves the southwest and we have vacationed there several times. Thinking about the Scottsdale area. I have been a UA member...
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    Thanks Klove and everyone else for your input. ...

    Thanks Klove and everyone else for your input. Dove into it first thing this morning and found some crazy stuff. It wasn't until I started using a new, dedicated pressure gauge (yesterday I was...
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    Thanks everybody for the info, today should be an...

    Thanks everybody for the info, today should be an interesting day. Big problem is there is no back-up chiller. Klove, I understand all that you said, except for, "then set head at design" What do...
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    Yes, both chillers are on the same water system,...

    Yes, both chillers are on the same water system, and I am afraid of the other one foulong in the near future. I will have to dig up as much info as I can find. I am new to facility and the powers...
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    It is not going off on the flow switch...yet. ...

    It is not going off on the flow switch...yet. What if the flow is just enough to make the switch but not enough to supply the volume needed? There is no dp switch. I don't know when, if ever,...
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    Plugged Chiller barrel?

    Don't know if this belongs on Commercial refrigeration or HVAC since it is a chiller question, but here goes:
    Banana ripening facility. 2 custom built up chillers each with 1 chill-con chiller...
  9. Replies
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    1,423

    Plugged chiller barrel?

    Don't know if this belongs on Commercial refrigeration or not but since it is a chiller question, here goes:
    Banana ripening facility. 2 custom built up chillers each with 1 chill-con chiller...
  10. Replies
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    I'm liking these responses. Maybe there is...

    I'm liking these responses. Maybe there is something to the lower subcooled temperature after the 45degF original temp. Ice, thanks for explaining the theory and how the load is shifted to the MT...
  11. Replies
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    Liquid subcooling theory

    I know there have been many threads concerning liquid subcooling, maybe these questions have been asked, and if so, please direct me.

    1.) +45deg.F has been the magic number for liquid subcooling...
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    Hill/Phoenix 2-stage open drive system

    Curious as to how Hill Phoenix's advanced 2-stage open drive system operates without an oil-seperator. And is the de-superheating of low temp discharge gas before entering high-stage accomplished...
  13. Replies
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    Just read the H/P links about it's newest refrig....

    Just read the H/P links about it's newest refrig. systems. Farm Fresh is using open-drive 2 stage technology. That's a throwback to the past, ie. Hussmann TD system. H/P states a large reduction...
  14. Replies
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    Thanks for all the replys. I liked the brief...

    Thanks for all the replys. I liked the brief history on the 30's & 40's refrigeration, Ice. I did not know that flooded evaps and floats were used on single NH3 machines. NH3 is a great...
  15. Replies
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    2,018

    refrigeration system design

    Happy New Year Fellas! I read alot of posts but rarely post myself. Lots of great knowledge in these threads, great tools for all service techs. I was a supermarket tech for 27 years (worked on...
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    LLDR: liquid line differential...

    LLDR: liquid line differential regulator-maintains a pressure differential in the liquid line to insure that liquid can return from the defrosting coil to the liquid header, usually set for 20#...
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    I started in the supermarket biz in the early...

    I started in the supermarket biz in the early 70's (switched to in house industrial in 2001, and believe it or not I still miss the work, not the overtime though!). Some Shop-Rite and Foodtown...
  18. Thread: SAM's CO2

    by kooltek
    Replies
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    4,546

    What type of liquid CO2 pumps are used and how is...

    What type of liquid CO2 pumps are used and how is the fixture temperature controlled? I work in the Industrial sector using liquid recirculation systems with R134a. Are the liquid pumps similar? I...
  19. Thread: SAM's CO2

    by kooltek
    Replies
    45
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    4,546

    Hey Guys, Merry Christmas. I have always been ...

    Hey Guys, Merry Christmas.
    I have always been fascinated with using CO2 for low temp refrigeration, it's really becoming popular in Europe in supermarkets. USA is always years behind, Anyway i...
  20. Replies
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    I am a HVACR service tech of 35 years. I own a...

    I am a HVACR service tech of 35 years. I own a post and beam cedar house with 3 zone baseboard heat and a 30,000 Btu ductless split downstairs which cools the whole first floor due to the open...
  21. Replies
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    where'd the oil go?

    Air:
    What was the original service call, or was ther one? You'd have to put the unit through some cyles and see what's happening. Oil should return after a defrost (and also liquid if there is a...
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    Thanks icemeister for the cpc site. I'm having...

    Thanks icemeister for the cpc site. I'm having trouble getting on the archnews site also. It's the first time i've come across this system in my 32 years in the business. Can you fill me in on any...
  23. Replies
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    Have any of you hi tech rack guys seen the new...

    Have any of you hi tech rack guys seen the new Direct Inpulse System from Kysor Warren? VERY WILD! I understand the concept, but unsure about some of the controls. Basic operation is: cases are...
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    You didn't mention what your net oil pressure is....

    You didn't mention what your net oil pressure is. You could have a bad (erratic) oil pump. I agree with checking the contactor also. You did mention that this is a recent problem. What has...
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    Just curious: are there any supermarket chains...

    Just curious: are there any supermarket chains who still use single conventional units (rather than parallel racks)in new store installations? I thought I heard that Kroger was still doing it (at...
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    Secondary system is all Wegman's uses on med....

    Secondary system is all Wegman's uses on med. temp. Works great. Very tight temps and approaches (coil temp to disch air temp). Warm glycol is used for the defrost with only small amount of temp...
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    Anyone have good wall of pride photos for...

    Anyone have good wall of pride photos for refrigeration systems? Lots of heating and A/C, Haven't seen many at all from us "refer" guys? Maybe I'm not looking hard enuff. I know I'm not much on...
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    Can anyone tell me how the job market is in North...

    Can anyone tell me how the job market is in North Carolina? My wife and I are looking to relocate, but I still have 10 years left til 60 and don't want to jeopardize my retirement benefits. I am a...
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    Does anyone know what the job market in North...

    Does anyone know what the job market in North Carolina is like for refrig techs/field reps/plant operators? I've been 27 years in supermarket work as field supervisor/tech/startup guy and controller...
  30. Thread: Rack Systems

    by kooltek
    Replies
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    6,538

    I mean 160 psig, I hit the 9 by mistake

    I mean 160 psig, I hit the 9 by mistake
  31. Thread: Rack Systems

    by kooltek
    Replies
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    6,538

    169 psig is not low at all. at least for...

    169 psig is not low at all. at least for refrigeration. That equals between 85 and 90 degree condensing temp. You can go as low as 122 psig which is a 70 deg. condensing temp. and safely feed TXV's...
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    I did it for 27 years Guys! Around the clock...

    I did it for 27 years Guys! Around the clock hours, weekends, holidays, missed soccer games etc. Why is it that I still miss supermarket work? I was a field supervisor for the last ten of the 27...
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    That is a huge rack of compressors. I don't...

    That is a huge rack of compressors. I don't think I've ever seen 7- 30hp compressors on one rack. Also never saw a Bohn rack, didn't know they even made them! Need some more info
    Low temp or med...
  34. Thread: Rack Systems

    by kooltek
    Replies
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    6,538

    press 1

    Just looking for general photos of the rack or compressors for as archive collection I'm putting together. Lots of older Hussmann firsts in there. Remember the BIG system? That's one we'd all like...
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    I know that as condensing temperatures decrease,...

    I know that as condensing temperatures decrease, system capacity increases. Can anyone tell me what the ratio is? How much capacity increase per degree of condensing temp. decrease? Same question...
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    zero

    You say you have injection subcooling, are you talking into the compressor or liquid line subcooling? What kind of compressors? If you have scrolls with the injection valves,or demand cooling. make...
  37. Don't know if my post will get read, since this...

    Don't know if my post will get read, since this is an older thread.but...I'm brand new to this forum, glad i joined, lot's of good info. Am I correct in thinking that alot of you techs are from...
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    Copes are just so easy to get at 2AM! And...

    Copes are just so easy to get at 2AM! And everyone is familiar with them. Bitzer makes hermentics and good ones at that, have had very few problems with them except for internal check valves, and...
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    Gasngo- I too used only the one belt drive pump...

    Gasngo- I too used only the one belt drive pump at the rack with jumps all over the place. It's difficult to pull from other parts of the system, especially on the sales floor unless special access...
  40. Thread: Rack Systems

    by kooltek
    Replies
    53
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    6,538

    icemeister

    Hey. thanks so much for the piping schematic. Where in the world did you find it? I dug through all my archives but nothing there. Sure brings back memories. One of the ones I worked on (if I can...
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    valdeloc

    They are definitly over the top-Wegmans that is. Top quality and they expect the same in service. Worked briefly in one, then got out of supermarkets-moved into industrial.
    They do use some cool...
  42. Replies
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    Wages

    $28.50/hr here in Central New Jersey and as far as I know, we have the highest poperty taxes ($10,000/year for 2500 sq ft ) and the highest insurance rates ($4500 for 3, 2000 year cars) in the...
  43. Thread: Rack Systems

    by kooltek
    Replies
    53
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    6,538

    Hussmann TD system

    Does anyone have or know where to get some vintage photos or information on the Hussmann TD system? I'm new to HVAC Talk and have been reading the threads you were posting about this system and it...
  44. Thread: enviroguard

    by kooltek
    Replies
    1
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    687

    Just registered with HVAC talk-great and...

    Just registered with HVAC talk-great and informative. Tyler Enviroguard is a great concept and works well when set up. My question concerns the liquid bleed back into the suction manifold. How...
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