Search Results - HVAC-Talk: Heating, Air & Refrigeration Discussion

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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...
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    1,313

    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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    3,363

    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...
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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...
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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...
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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...
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    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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    3,844

    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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    3,844

    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...
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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...
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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...
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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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