http://hvac-talk.com/vbb/ Topics about Walk-ins, Display cases, Ice Machines and other refrigeration equipment en Mon, 20 May 2013 02:32:49 GMT vBulletin 60 http://hvac-talk.com/vbb/images/misc/rss.png http://hvac-talk.com/vbb/ http://hvac-talk.com/vbb/showthread.php?1313911-Interesting-Vacuum-Observation&goto=newpost Sun, 19 May 2013 16:49:36 GMT I've been working on some vending machine refrigeration units recently. Nothing complicated. Very basic refer units that can be pulled out and repaired in the shop. I repaired a leak in a unit and then began evacuating the system while monitoring the micron gauge. So after about 15 minutes the system pulls down to 700 microns and then seems to stay there for a long time. I was wondering why such a small system would take such a long time to pull down because I was using Napion valve core removal tools on both the low and high side and I'm fairly confident in my vacuum setup because if I close the ball valves on the core removal tools tools I can get the vacuum setup to pull down to 200 microns pretty quick. So I began to suspect refrigerant was entrained in the oil in the compressor and boiling off slowly. So I decided to try something to see if it would speed up the vacuum process.
I lifted the compressor end of the unit about one or two inches off the bench and let it drop. As soon as I did this the sound of the vacuum pump changed and I could see a distinct flow of vapors exiting the vacuum pump. After I did this a couple times the system quickly pulled into a deep vacuum.
So does anyone have any explanation of what happened? Did jostling the oil in the compressor trigger some reaction that allowed the entrained refrigerant and moisture to boil off at an accelerated rate? What's the physical phenomena at play here? ]]> air1 http://hvac-talk.com/vbb/showthread.php?1313911-Interesting-Vacuum-Observation http://hvac-talk.com/vbb/showthread.php?1313811-Compressor-parts&goto=newpost Sun, 19 May 2013 13:19:18 GMT I replaced a compressor on a walkin freezer. The one I took out has a bad end bell. Is this part available and where. Model KALB 0150 CAV 800. This... I replaced a compressor on a walkin freezer. The one I took out has a bad end bell. Is this part available and where. Model KALB 0150 CAV 800. This compressor would work good on old ice machine that I can't put alot of money into.
Thanks fishman ]]> fishman9047 http://hvac-talk.com/vbb/showthread.php?1313811-Compressor-parts http://hvac-talk.com/vbb/showthread.php?1313571-walk-in-freezer-question&goto=newpost Sun, 19 May 2013 00:42:29 GMT i installed a new Norlake cooler today with the capsule pack refrigeration unit. pretty cool. 100% self contained and complete. run L1,L2 and hook up... i installed a new Norlake cooler today with the capsule pack refrigeration unit. pretty cool. 100% self contained and complete. run L1,L2 and hook up and you're done.

question- as i keep coming across very old P.O.S walk ins- couldn't you just cut a correct size hole in the ceiling panel with a sawzall, install a capsule pack, hook up 2 wires and have a brand new refer system. they are pretty cool. evap, condenser, drain, controls all in one pre packaged unit. also sit flush mount so you gain space inside. Any reason a home brew conversion wouldn't work great on an old box? ]]> kklobas http://hvac-talk.com/vbb/showthread.php?1313571-walk-in-freezer-question http://hvac-talk.com/vbb/showthread.php?1313501-manitwoc-ice-machines&goto=newpost Sat, 18 May 2013 22:49:44 GMT Hey guys,I have a new Manitowoc IDO852a-261 aircooled cuber,After cleaning and sanitizing the unit,Ice will jam up in the curtain,according to the... Hey guys,I have a new Manitowoc IDO852a-261 aircooled cuber,After cleaning and sanitizing the unit,Ice will jam up in the curtain,according to the customer.I have looked at it several times and cannot catch it in the act.Machine runs like a top everytime I get there.This thing is driving me nuts!any help would be appreciated ]]> tcsmechanical http://hvac-talk.com/vbb/showthread.php?1313501-manitwoc-ice-machines http://hvac-talk.com/vbb/showthread.php?1313461-Hisho-scored-1-Tech-0&goto=newpost Sat, 18 May 2013 21:43:54 GMT This ones killin me KM630 M W H .... water cooled cuber ice machine Get there and machine is off. Owner says it was beeping at him when he... This ones killin me

KM630 M W H .... water cooled cuber ice machine

Get there and machine is off. Owner says it was beeping at him when he came into work. I asked , did you happen to count the beeps ? Nope

Turn it on , it seemed like forever until it went into ice mode , and when it did the thing was cycling erratically , so i call tech support. He determines water valve not working right. Its almost 5pm , and hes in a hurry to end the call.

I replace that next day.

Still acting up , and of course on a saturday theres no tech supp

I think think the board is messing with me , but anyhow heres the low down.

Thing had mold all over , nice and thick , I Cleaned the nasty gummed up water level sensor. Threw in some nickel cleaner and got her nice and clean , wiped everything down good. Took my time and did a good job. Freakin squeaky clean.

Put in ice mode.

Board goes though its test fine. Bin fills up.

Goes to harvest , which is first , and it only goes into harvest for a split second ( im hearing the hot gas valve ) , then the board goes into its test mode again , and im like .... huh ? Then i hear the hot gas solenoid split second again, then the boards testing again.

Wth

Shut it off. Turn back on.

Board does its test , bin fills , harvest kicks in for like 30 sec , then ice mode kicks in. Sweeeeeeeeet.

Attempts to make ice for about 10 min, tube bends nice and frosty , suction 40 , and im patiently waiting on the ice , and suction slowly dropping to 35.

All the sudden it shuts off , and board Led's light up one at a time like its in test mode , but its not test mode , i dunno what mode you would call it.

Closest green LED comes on , then 5 seconds later that ones off and 2nd led comes on , then that ones off and 3rd comes on , 5 seconds later 4 comes on and so does compressor and water curtain, shes attempting to make ice again.

So im like ... wooohoooo ... and im listening to the sweet sounds.

5 min later turns back off , and the board is doing the strange test mode again , then compressor comes on and making ice.

Sometimes its only 1 minute between acting up , and sometimes 20 min

Does this like 5 times on me

I shut it off , try again.

This times it makes a batch of ice after 45 min without problems.

Havests fine for 4 minutes , suction is 88 , goes into ice mode , suction 47 , bends frosting nicely , and now few minutes later back to the same crap of shutting down and test mode.

Shut it off , unplug wires , bang relays , tap this tap that , turn back on.

Makes another batch in 48 min , harvests , back to ice mode , and back to the same ol crap again.

I leave and tell customer i will return monday when tech supp is open.

He leaves it running while im gone , it makes 3 batches of ice , and back to messing up for him.

WTH ? ]]> Snapperhead http://hvac-talk.com/vbb/showthread.php?1313461-Hisho-scored-1-Tech-0 http://hvac-talk.com/vbb/showthread.php?1313261-Used-Kysor-multi-deck-cases-I-need-to-identify-model-to-install-properly&goto=newpost Sat, 18 May 2013 11:44:30 GMT A small grocery store(owned by people from a foreign country) bought 3-12 foot used sections and they want me to put them together and get a... A small grocery store(owned by people from a foreign country) bought 3-12 foot used sections and they want me to put them together and get a condensing unit for them. I told them I need a model number so I can find the installation manual for them so I can install these as correctly as I am able. It looks like 2 of the sections were piped together and the third was physically connected but not the refrigeration piping. The two sections that were piped together have the exit pipes coming out of the top of the unit and the third section has it's own set of pipes coming out of the top. I apologize for my ignorance, but I don't have a whole lot of experience with this type of equipment. On the wiring diagrams all I can find is "2500 series". I am not sure how old these sections are but they look like they may have been stored for a while, because some critter stored his nuts in one of the bigger holes in the side of the sections. The txvs that I see are R22 and the one I can see completely is "EGVE 1-1/2". The owner also says they are meat cases, but I don't know if that is what they were or what he wants them to be. I have to go back there next week, they will be moving them into the store. I also need to see if these people bought these units without knowing what they were or if they have more info.

Is there a location that I could not see where I can find the model number of these units? If I could get the manual I could determine whether I can pipe the units into one condenser or whether the three sections need to have two condensers. Again, sorry for my ignorance on this. ]]> tcape http://hvac-talk.com/vbb/showthread.php?1313261-Used-Kysor-multi-deck-cases-I-need-to-identify-model-to-install-properly http://hvac-talk.com/vbb/showthread.php?1313141-Tyler-NC2-Rack&goto=newpost Sat, 18 May 2013 03:52:45 GMT Anyone know where I can find a schematic for a Tyler NC2 rack with hot gas defrost? Anyone know where I can find a schematic for a Tyler NC2 rack with hot gas defrost? ]]> keepinitcool http://hvac-talk.com/vbb/showthread.php?1313141-Tyler-NC2-Rack http://hvac-talk.com/vbb/showthread.php?1312901-Turbo-Air-Walk-in-Condenser&goto=newpost Fri, 17 May 2013 22:50:16 GMT I'm trying to locate the manual for this machine and am having no luck on-line. To top it off their office is closed now. The mod# is: TS015MR404A2. I'm specifically looking for its clearances. I have two condensers and they reject heat in between the both of them. They're 14.5" apart and my compressor for the walk-in cooler burned out within a year. I'm thinking its due to the spacing. The other condenser is much larger, runs more often and is for a freezer. Any help would be greatly appreciated.

Thanks ]]> 501miller http://hvac-talk.com/vbb/showthread.php?1312901-Turbo-Air-Walk-in-Condenser http://hvac-talk.com/vbb/showthread.php?1312811-Butcher-case(s)-problem-can-t-get-it-to-30-38-degrees-with-out-icing-compressor&goto=newpost Fri, 17 May 2013 18:18:18 GMT Looking for a little help--Tx in advance! Got two butcher cases combined (two TXV (expansion valves)) and one seafood case (one TXV) combined into... Looking for a little help--Tx in advance!

Got two butcher cases combined (two TXV (expansion valves)) and one seafood case (one TXV) combined into one condesor/compressor on roof of small market. R-134a No fans, all gravity cases, very old cases, some fins on evap tubes missing, and new compressor.

If I adjust charge low--sight glass not full and flashing--I can get to temps between 30 and 38, which is great but my suction line stays iced at compressor bell and wet and ices up to heads at times. I open all three of my TXVs for more super heat and still iced. (i am in no way a super heat expert-I have always first adjust charge then as last resort play with expansion valves--always striving to not allow icing at compressor).

I adjust the charge full (full sight glass) with TXVs full open, TXVs half way closed and extreme closed (less super heat)--full charge doesn't cool below 48 degrees with all above examples.

I drastically reduce charge and I get low temps but icing compressor.

I could use a little direction. Thank you. ]]> rudyworks http://hvac-talk.com/vbb/showthread.php?1312811-Butcher-case(s)-problem-can-t-get-it-to-30-38-degrees-with-out-icing-compressor http://hvac-talk.com/vbb/showthread.php?1312771-Something-new-for-me-and-i-think-it-s-awesome&goto=newpost Fri, 17 May 2013 16:48:35 GMT

I took this yesterday while checking out my new customer. If you've never seen it before, it's a Hoshizaki ice machine on top of an automatic bagging machine that bags 10lb bags of ice, heat seals them and drops them into a Leer merchandiser. Check out how this thing works! I thought it was cool. ]]> DLZ Dan http://hvac-talk.com/vbb/showthread.php?1312771-Something-new-for-me-and-i-think-it-s-awesome http://hvac-talk.com/vbb/showthread.php?1312521-Oil-for-Follett-R4W-icemaker-gearbox&goto=newpost Fri, 17 May 2013 03:10:55 GMT I am looking for the specifications or equivalent oil (to buy locally) for Follett oil # 500802. It is used in the gearbox for a Follett R4W ice... I am looking for the specifications or equivalent oil (to buy locally) for Follett oil # 500802. It is used in the gearbox for a Follett R4W ice maker manufactured approx 1986. Thanks, Gene ]]> Gene285 http://hvac-talk.com/vbb/showthread.php?1312521-Oil-for-Follett-R4W-icemaker-gearbox http://hvac-talk.com/vbb/showthread.php?1312081-Refrigeration-training&goto=newpost Thu, 16 May 2013 12:16:13 GMT Hey guys,

I'm looking for some online refrigeration training. Just something that I can go over with guys that explains basic stuff (sequence of operation, etc).

Any helpful info would be greatly appreciated. Thanks in advance. ]]> Brent Ridley http://hvac-talk.com/vbb/showthread.php?1312081-Refrigeration-training http://hvac-talk.com/vbb/showthread.php?1311921-medium-temp-walk-in-freezing-product&goto=newpost Thu, 16 May 2013 02:03:37 GMT looked at a medium temp walk in today running to cold. found it was getting to about 30 degrees. has a johnson control a419 temp control. checked it... looked at a medium temp walk in today running to cold. found it was getting to about 30 degrees. has a johnson control a419 temp control. checked it against my fluke 52 digital. it seems to be reading about 5-6 degrees off actual temp. ohmed out sensor per manual. got 900 ohms at 40 degrees. right on spec. so i guess that means temp control is bad? sensor ohms correct but temp control reads 44 when actual temp is about 38. box about 10 yrs old, sensor never moved or anything like that.

also low suction(35 psi with r22) at 35 deg. box, while very low sh, about 1-3 degrees. sight glass clear, fans both on, im thinking coil must be dirty inside restricting airflow. any help appreciated. thanks ]]> kklobas http://hvac-talk.com/vbb/showthread.php?1311921-medium-temp-walk-in-freezing-product http://hvac-talk.com/vbb/showthread.php?1311291-bacharach-infomant-2-leak-detector&goto=newpost Wed, 15 May 2013 02:32:22 GMT has anyone used this and liked it? thinking about getting one-on sale right now. i like that it does propane and refrigerant, as i do hot side as... has anyone used this and liked it? thinking about getting one-on sale right now. i like that it does propane and refrigerant, as i do hot side as well. on sale for 300. ]]> kklobas http://hvac-talk.com/vbb/showthread.php?1311291-bacharach-infomant-2-leak-detector http://hvac-talk.com/vbb/showthread.php?1310751-considering-supermarket-refrigeration-job-!-have-questions-!&goto=newpost Tue, 14 May 2013 04:30:38 GMT So Im considering taking a job w/ a shop that only does supermarket refrigeration. On call every 3 weeks, no travel, and the service manager... So Im considering taking a job w/ a shop that only does supermarket refrigeration. On call every 3 weeks, no travel, and the service manager mentioned 80 hr weeks.....what....80 hr weeks, thats 7 12's. thats heavy hours boys. But I'm assuming thats worse case scenario, Or im hoping anyways. I got 2 kids/wife, not sure if im down for all that. Can someone sorta give me the rundown ! Is it good work ? Will i have no life ? Im a restaurant tech so, im used to long hrs. and ****ty work but Im a little nervous about the supermarket side. I wanta hear some good things ! ]]> Cousin Tony http://hvac-talk.com/vbb/showthread.php?1310751-considering-supermarket-refrigeration-job-!-have-questions-!