IT Room Overheating Liebert AC Fails In A Weird Way

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  • Опубліковано 24 лис 2024

КОМЕНТАРІ • 107

  • @jfrancis98
    @jfrancis98 2 місяці тому +23

    I had an intermittent high pressure issue on one of these. Head master was sticking in the cooler mornings even though I could never get it to happen in front of me. Replaced head master and haven’t had an issue since. Hate intermittent problems. Keep up the good work. Enjoy your channel. 👍🏿

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому +15

      I appreciate you sharing that with me, like I said it was very odd the way it reacted so hopefully when I go back to replace the coil, I can replace that head Master at the same time and eliminate both things at once.

    • @Andrewchen7955
      @Andrewchen7955 Місяць тому +1

      Are you serving Fresno area?

    • @jfrancis98
      @jfrancis98 Місяць тому +1

      @@Andrewchen7955 I’m in Boise.

  • @halverde6373
    @halverde6373 2 місяці тому +11

    I ALWAYS BID a backup system with anything dealing with critical needs.
    Won every bid I gave against other contractors that bid only one.
    The backup was rated at about 50% of needed capacity but would squeak them through a failure of their main system.
    Was surprised no other contractors offered that option.

  • @sterlingarcher46
    @sterlingarcher46 2 місяці тому +13

    Man them people at Veto better start sponsoring my man Rick with all the free advertising they've been getting!

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому +3

      You can thank TruTech Tools for that Veto didn’t do anything for me.

    • @sterlingarcher46
      @sterlingarcher46 2 місяці тому +1

      @@HVACRSurvival That's a bummer , I guess they must only be interested in the young lads who " appeal to the younger crowd " ie : social media BS ..... Oh well ...

  • @borshardsd
    @borshardsd 2 місяці тому +2

    Great video brother!
    I ran into my first liebert system, 2 water source cabinet units with the outside water loop with a 3 fan heat exchanger out in back of the p.d. cool stuff and keep rocking and filming.

  • @jasonjohnsonHVAC
    @jasonjohnsonHVAC 2 місяці тому +1

    This is a mini mate 2 system. Ive worked on them quite a bit. They are the big name brand in CRAC systems. They are engineered well, sometimes too much, like an AAON. i enjoyed the video like all yours.

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому +1

      Thanks Jason. I’m still waiting for parts and I believe it’s still working 😅

  • @theangrytechnician6649
    @theangrytechnician6649 2 місяці тому +1

    Thanks for sharing Rick. Unfortunately, Liebert isn’t want it used to be. Think they’re called Vertiv now…

  • @shanetoler7302
    @shanetoler7302 2 місяці тому +2

    Probably close to 80% of my work is on Lieberts. My shop is one of their factory reps. I’ve been to Ohio for a factory training and I have to maintain the certifications to work on the equipment.
    The reason you have to raise the head pressure to 230 is to stop the headmaster from regulating. You are basically tricking the unit into thinking it’s 110 outside. In those conditions the receiver should be full.
    That charging method does work year round, but typically I check it at 250psi to avoid overcharging.

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому +1

      Cool thanks for clearing that up.

  • @TommyPeel
    @TommyPeel 2 місяці тому +3

    Looks like Liebert was bought out by Vertiv in 2016. I work in IT and our new data center has Vertiv/Liebert CRAC units. I enjoy your channel, keep up the good work!

    • @ZRock7771
      @ZRock7771 2 місяці тому +1

      Emerson owned liebert before vertiv did.

    • @davidnull5590
      @davidnull5590 2 місяці тому +3

      I didn't know Liebert is an Ohio company, I mistakenly thought there was some German connection - there isn't.
      Ralph Liebert (1918-1984) in Columbus, Ohio created 1965: Capitol Refrigeration Industries. in 1965, Ralph created the company in his garage in Columbus; then IBM promoted the new cooling product.
      Liebert is now a subsidiary of Vertiv. Liebert cooling units are manufactured by Vertiv Brands (formerly Emerson Network Power). "Vertiv is an American multinational provider of critical infrastructure and services for data centers, communication networks, and commercial and industrial environments. Vertiv Holdings Co. Westerville, Ohio, U.S."

    • @brnmcc01
      @brnmcc01 2 місяці тому +1

      @@davidnull5590 Yeah I was thinking of the Liebert cranes, they're one of the best crane brands in the world, but you pay for that quality $$$

    • @ZRock7771
      @ZRock7771 2 місяці тому +1

      @@davidnull5590 New Liebert's always hip from Ohio, I just thought that's where they came to from Germany. I never knew it was solely a US based company lol. I would always tell new techs Liebert's are complicated because German engineering lol.

  • @HvacUSandA
    @HvacUSandA 2 місяці тому +8

    Those Liebert were pretty good systems back in the day, but for whatever reason the 407C is rough on expansion valves and rubber components, A lot of people now just replace them with an inverter type split system, you could buy three inverter systems for the cost of a Liebert

    • @brnmcc01
      @brnmcc01 2 місяці тому

      Yup, I threw in a 3 ton single head. LG mini split in a server room back Dec 31 2022, and it's been working great. Had one of the coldest winters in last 3 years this past January and it's been working like a champ. The old system had some junky old air handler with terrible ductwork in the droppped ceiling, and the compressor had burned out badly in the old one and it was only 2 ton, and wasn't keeping up. The mini split is also much quieter, I was able to delete all the junky ductwork, and it does a much better job of humidity control, and they were able to raise the set point up to 74 degrees, instead of 68-70 with the old junk that was in there.

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому +2

      Yep

  • @fshn76
    @fshn76 2 місяці тому +1

    That unit was pretty neat. Never dealt with a Leibert before. Always enjoy your videos Rick. Learn lots even if it’s something that I may not work on I can pull different ideas from your diagnosis that can help me on other things. I hope someday to be the king of the schematics like yourself. Thanks for another great video.

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому +1

      I have plenty of issues with them at times

  • @oscalerup1129
    @oscalerup1129 2 місяці тому +1

    Definitely different came up on an old Lebert unit a few weeks ago. Someone slapped a Goodman condenser on it of course it was grounded.
    I’ve really been liking that veto lunch box this summer had a local supplier that had way too good of a price on it.
    Ill be watching to see how you like that testo meter I’ve loved the 902 but it does have its shortcomings

  • @Shmash_whatever
    @Shmash_whatever 2 місяці тому +1

    I had an intermittent head pressure problem on this same style unit several years ago.
    I got up on the roof to the condenser one time and it actually went out on head pressure in front of me. It happened so fast I didn’t really have a chance to see what happened, so I mashed in the contactor and watched my gauges.
    Took about 5 seconds for the relief valve to pop off right in my face. Dye and oil and refrigerant everywhere lol.
    I started it back up and it ran perfectly until we replaced it a few years later.

  • @helmsajr
    @helmsajr 2 місяці тому +3

    Great job Rick has always.

  • @Byron88
    @Byron88 2 місяці тому +1

    I've also had to do a head pressure control on a Liebert, but the compressor was in the AHU and had a remote condenser. it was R22 converted to 407C had a Sporlan 210psi in her, But that unit also called for charging by sight glass, it had a massive receiver on the roof with 2 sight glass, it gave some OAT and said in this range half way up the first, this range first full this range half way up the second sight glass, and that's it. it was a 5 ton unit took 28.5lbs of gas, crazyness

  • @EverythingHVACR
    @EverythingHVACR 2 місяці тому +1

    Nicely done, Rick 👏

  • @PhillipFrischman-vo8gm
    @PhillipFrischman-vo8gm 2 місяці тому +1

    Really on the veto bag.
    That thing looks nice I might get one just because

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому

      Technically, it’s probably no worse than a yeti or any of the other bags price

  • @johnwalker890
    @johnwalker890 2 місяці тому +1

    Good job Rick, wasn't sure about the pressures, but first thought was that it is low, not sure on small condensers............

  • @FPHA697
    @FPHA697 2 місяці тому +1

    Nice diagnosis brother!

  • @HVACR559
    @HVACR559 2 місяці тому +1

    That sight glass way up at the top was scaring me. Used to the concept of gust having enough refrigerant to do the job, never above 3/4.

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому

      Bingo. That’s what I was thinking

  • @litz13
    @litz13 2 місяці тому +1

    We have four Liebert CRAC systems in our datacenter. You could fit this entire cute little thing inside less than a fourth of a CRAC.
    Massive, massive, massive coolers.

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому

      That would be cool see. I’ve seen some nice rack cooling units.

    • @litz13
      @litz13 2 місяці тому +1

      @@HVACRSurvival these aren't within the racks, they are standalone (against the walls) pressurizing the under floor space with conditioned air. Dual compressors in each unit. I'd guess somewhere in the 30-40 ton range.

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому

      Those must be some really large server rooms

    • @litz13
      @litz13 2 місяці тому

      @@HVACRSurvival maybe 100' x 50'? We have four rows of equipment about 25 racks long.
      Btw we actually do have two APC rack coolers if you're interested. Catch is, they're in Norcross, GA...

  • @Shawn_RHVAC
    @Shawn_RHVAC 2 місяці тому +14

    With the ultrasonic detector they highly recommend that you spray a liquid over the possible leak to help locate as the bubbling creates the ultrasonic sound needed to locate

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому +3

      I’ve had problems with the hydrogen in the water, popping bubbles and throwing you off.

  • @terryh8421
    @terryh8421 2 місяці тому +1

    Interesting video, thanks Rick.

  • @scotts4125
    @scotts4125 2 місяці тому +6

    When you said it was bright and dark in there it reminded me of my now 21 year old when he was about 5. He told the pediatrician he was constipated and had diarrhea. Good stuff. lol

  • @ale_9450
    @ale_9450 2 місяці тому +1

    If you are looking for a meter that does it all, maybe look into the fieldpiece Meters, always enjoy your videos and always learning something from you

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому +2

      I have some Fieldpiece stuff. Testo has been good to me, I prefer the gauges, the probes are a little less loving compared to my Fieldpiece probes but the meters from them have had problems with the complex vfd drives

  • @sivalley
    @sivalley 2 місяці тому +1

    16:47 saw some predator blood on the cap for the port attached to the u bend on the bottom of the evap coil.
    Willing to bet that when it goes into dehumidification mode (dumps hot gas into the suction line to effectively reduce system capacity and why they need that suction pressure regulator) the back pressure was high enough to pop a weakened braze.

  • @davidtambourine5244
    @davidtambourine5244 2 місяці тому +2

    Have that unit at the facility I work at.Been a problem child for me in the past. That air handler pulls return from the center and blows air out the sides of the grill.There should be an access door on the side of the filter that should be in place to prevent recirculating the air.

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому

      There’s some foam in there that’s not in place like it should be.

  • @kingwookie7210
    @kingwookie7210 2 місяці тому +1

    i just had a call on a minimate on friday!! i got off easy, the controller on the wall was showing 4 degrees higher than the room temp and the controller has a calibration function ez mode.

  • @WilliamAnstead-x9l
    @WilliamAnstead-x9l 2 місяці тому +2

    TD across the filter drier. that'll be done with the TXV anyway. Nice job.

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому

      That was just replaced with the last repair. But it will get changed again.

  • @Eddy63
    @Eddy63 2 місяці тому +1

    Nice little vid Rick ... Thx

  • @HVACR559
    @HVACR559 21 день тому +1

    CAT III 1000V is really important for commercial HVAC work. Unfortunately the 902FC only rated CAT III 600V. That is a safe residential rating. Don't know why FLUKE did that on a meter designed fot HVAC work.
    A lot of meters say they can do inrush but, it takes a really fast meter to read inrush correctly. You have to capture the ring, simular to watching Ignition coils on an O-scope. Fluke inrush meters takes 400 samples every 100 ms. FP doesn't come close. Curious to see what the sampling rate is on the Testo's.

    • @HVACRSurvival
      @HVACRSurvival  21 день тому

      I’m going to test it against my 376fc

    • @HVACR559
      @HVACR559 17 днів тому +1

      @HVACRSurvival Fluke has information on how their meters work capturing the inrush. Search inrush fluke clamp. The 345 was listed as an HVACR meter. Maybe one day it will be an ebay find when I'm loose with my money. I like the o-scope on a clamp meter. Would be a complement to my 87.
      I carry a small o-scope on the van, brought a screen shot back to the other techs in the shop. What is that? That's the voltage over time. There was no 24 control voltage to the ECM. I see a + and - on the plug I wonder if this is digitally controled? Sure enough! I need to make sure the board is trying to control the motor when im quoting two $1000 motors. They roll there eyes and move on.

    • @HVACRSurvival
      @HVACRSurvival  17 днів тому

      @@HVACR559 I have a decent little two channel scope that’s portable that I use for my power station reviews. It’s 70 MHz. The 376 was their best meter in the clamp form and it’s not that much more money. You can get lucky and pick one up for 200 bucks easy on eBay.

  • @sherwinalvarez7365
    @sherwinalvarez7365 2 місяці тому +1

    Is Apu doing HVAC tech support also? Rick was being all politically correct. Great job. Great video.

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому

      I don’t know like I said it took forever to get through to technical support. I was not impressed.

  • @HvacUSandA
    @HvacUSandA 2 місяці тому +1

    Contrary to normal logic those systems will trip on head pressure when they are low on gas, the headmaster control valve will shift trying to build head pressure leaving nowhere for the hot gas to go but directly to the expansion valve, which is a restriction and it goes off on high pressure

  • @throttlebottle5906
    @throttlebottle5906 2 місяці тому +1

    looks like green "predator blood" down on the service port cap at 19:55 did that drip from above or is the schrader core missing. lol

  • @jesseh5554
    @jesseh5554 2 місяці тому +1

    I love my veto lunch box

  • @davidnull5590
    @davidnull5590 2 місяці тому +2

    I didn't know Liebert is an Ohio company, I mistakenly thought there was some German connection - there isn't.
    Ralph Liebert (1918-1984) in Columbus, Ohio created 1965: Capitol Refrigeration Industries. in 1965, Ralph created the company in his garage in Columbus; then IBM promoted the new cooling product.
    Liebert is now a subsidiary of Vertiv. Liebert cooling units are manufactured by Vertiv Brands (formerly Emerson Network Power). "Vertiv is an American multinational provider of critical infrastructure and services for data centers, communication networks, and commercial and industrial environments. Vertiv Holdings Co. Westerville, Ohio, U.S."

  • @coldking8383
    @coldking8383 2 місяці тому +5

    Had a leaker in a walk-in cooler evaporator, last week . My stratus only hit on it once . Pinpointed it with my Bacharach informant 2. Good Video Rick .

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому +2

      Interesting. I haven’t heard a whole lot good about the informant 2? Honestly, I believe my H10-PM was better than my H10-pro. Depends on the flavor. R22 is where it shined

    • @coldking8383
      @coldking8383 2 місяці тому +3

      @@HVACRSurvivalI do believe the informant uses heated diode tech - I generally use the informant for HC gas - have a tip for it. But this leak kinda pissed me off. So last week I ordered a DR82 from TruTech tools . Thanks for the 8% ! I have found that some refrigerants sound off better to different detectors . The Stratus has been my money maker . Someone told me that I should send her back to get a recalibration? I do own an old GE H10 - haven’t used it in years though , it was super in its day . I think Bacharach makes the H10 now .

  • @halverde6373
    @halverde6373 2 місяці тому +1

    Cost of an HVAC system is meaningless if the customer is offering their critical system to their customers.
    They just need it to function within their heat removal parameters .
    Didn't require heat load with people for a backup, just the running equipment.

  • @halverde6373
    @halverde6373 2 місяці тому +2

    A staff of 20 people sitting doing nothing requires one ton of heat removal per hour counting nothing else.

  • @ThisyoungTony
    @ThisyoungTony 2 місяці тому +1

    Veto, blue collar gucci

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому

      Pretty much, they get the nice stuff why shouldn’t we?😁👍👍

  • @zekenzy6486
    @zekenzy6486 2 місяці тому +1

    Great video. Thank you for sharing. Have a nice weekend and labor day ^_^

  • @davidturney2975
    @davidturney2975 2 місяці тому +2

    Those units can get very confusing especially if you don't deal with them all the time.

  • @LilyRoseElectric
    @LilyRoseElectric 2 місяці тому +1

    Great 🎉 job

  • @brnmcc01
    @brnmcc01 2 місяці тому +1

    How many tons is that system? You might be better off just replacing the entire thing with a mini split system. I did a 3 ton single head unit for a server room winter before last on New Years Eve, and it's been working fantastic. The thing with that server room I did, they need cooling even in the middle of January since the server room is a secure room in the middle of the building surrounded by heated conditioned space, and mini splits tend to do very well with low ambient cooling right out of the box.
    That Liebert looks like a cobbled together pile of fecal... lol

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому +1

      I forget, probably 5 tons. We sell Mitsubishi and carrier mini splits. And that’s what we’ve used plenty of times. Technically Liebert makes some pretty fancy systems. This is one of the lesser quality ones. The one I have at one computer room is fully touchscreen with an Emerson controller and they’re made to run in -20° weather I believe.

    • @brnmcc01
      @brnmcc01 2 місяці тому

      @@HVACRSurvival Mitsubishi is better I think or even Fujitsu. Only reason I went with LG that time is the supply house that stocks LG is literally two doors down on the same street and under 2 miles from my house, and nobody else had anything in stock. This was the tail end of the Covid crap, and stuff was hard to get. And they needed cooling asap, this place they work on top secret battlefield communications stuff for the US military so cost wasn't as much of an issue rather than "just do what needs to be done, and make sure it's reliable". A mini split isn't perfect for a small server room but it was good enough for government work as they say :D
      They have 5 full height racks in there, all on five 120v 30 amp breakers plus a big UPS system so that's a lot of wattage to cool down.

    • @sandy1653
      @sandy1653 2 місяці тому

      @@HVACRSurvival Yeah the bigger units fitted with an iCOM panel and properly networked up with the right sensors can do some really neat stuff. These smaller units aren't my favorite but we use 'em anyway because they integrate into the control system and let us have one panel to control all the systems across all our sites with.

  • @JUNIORROJAS-e9n
    @JUNIORROJAS-e9n 2 місяці тому +1

    Get the UV light out! Stop messing around with that expensive leak detector. 😅

  • @colbyharrison9123
    @colbyharrison9123 2 місяці тому +1

    Worked on one of these units last week. Not impressed with them. had already failed a compressor at 1 year old

  • @JP-sd2cw
    @JP-sd2cw 2 місяці тому +1

    Did you put your screw driver through the solenoid to stop it from burning out?

    • @Sctronic209
      @Sctronic209 2 місяці тому +1

      Yep you’re correct.

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому

      Correct JP. It’s an induction heater without anything in the middle. And you’ll burn that coil out within a few minutes if you don’t have some sort of metal core in there.

  • @Ericbakereb1
    @Ericbakereb1 2 місяці тому +1

    Designed by NASA^

  • @danfinch3963
    @danfinch3963 2 місяці тому +2

    If that device can measure a gnats fart, can it measure human or cow gas as well? 🤔

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому +1

      Only you Dan

    • @danfinch3963
      @danfinch3963 2 місяці тому

      @@HVACRSurvival hey, you should be impressed that I'm listening to your videos that intently. :)

    • @danfinch3963
      @danfinch3963 2 місяці тому

      @@HVACRSurvival at least you're getting some return on your tax dollars. 😁

  • @Ace707xtc
    @Ace707xtc 2 місяці тому +1

    2m in and you show us that extremely clogged Evap Coil. Airflow is king. That unit isn't worth saving.

    • @Ace707xtc
      @Ace707xtc 2 місяці тому +1

      Watched more. Coil wasn't that impacted.

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому

      🤣👍👍

  • @halverde6373
    @halverde6373 2 місяці тому +1

    A person just sitting puts out 600 btu's per hour.

  • @eastcoast186
    @eastcoast186 2 місяці тому +1

    👍👍👍👀🇺🇸

  • @PhillipFrischman-vo8gm
    @PhillipFrischman-vo8gm 2 місяці тому +1

    No shit.....

  • @jonnyjonnyyespapa8013
    @jonnyjonnyyespapa8013 2 місяці тому +1

    Looks like the guy before you misdiagnosed the solenoid.

    • @HVACRSurvival
      @HVACRSurvival  2 місяці тому

      I can’t say for sure. He had different symptoms from what he described.