Production Chiller Not Keeping Temp And Flow Issues

[@HVACRSurvival]

SORRY FOR THE LATE RELEASE! This has been a crazy week and had to many things going on. I'm still a little green on chillers but if you know everything already then why are you watching me 😛

[@prothermal_refrigerationHVAC]

i green on everything because i try do everything.i like chillers,custom refrigeration systems and cascade ULF,because not many techs want work on it.

[@HVACRSurvival]

I feel you 👍👍

[@throttlebottle5906]

HOW DARE YOU~~~~~ 🤣

[@brianmillion-osborne6747]

Sounds like a water flow / heat rejection issue to me. Great video thanks for posting

[@July4.1776]

I sometimes stress out working (or fixing in a timely manner) on a $3,000 furnace to keep one person warm…. Meanwhile, you’re working on a massive 6 or 7 figure chiller that is the lifeline of a multi million dollar operation. Perspective, I guess!

[@brnmcc01]

A place like that though they have 480v 3 phase power, wonder why they're running that kind of chiller system built from cheap (relatively) scroll compressors? One of the medical device manufacturers near me, has a compressor room with 6 100hp Carrier screw compressors for their chillers, all R134A. Been very reliable (so far). Has a couple BAC cooling towers, and a 2 million gallon water storage tank. Seems kind of messy and hard to work on with all that refrigerant piping and awkward group of scroll compressors.

[@commenter5469]

I work on those control panels a lot. You really got to get special tools ( looks like bent screwdriver) for those spring loaded contacts. Using small flat screwdriver is iffy, and actually damages terminal block. I’ve got Wera ones. You can also get Phoenix Contacts and Wieldmuller brand. You MUST crimp ferrules on those sensor wires, and with them - even if you pull them, and they are not coming out, it still doesn’t mean you get a good contact.

[@terryh8421]

@commenter5469 Good advice!

[@PaulMack1249]

It appeared in the site glass that there was no liquid but some foreign material. When you recover the refrigerant is there a way to flush the system free of this “junk”?

[@HVACRSurvival]

Mainly, just keep changing filter dryers. If you run flushed through that heat exchanger, it might get trapped in there and I highly doubt it’s gonna shove anything out.

[@australianfridgie4469]

perfect candidate for EEV’s on older chiller. Water cooled and a critical production facility. Will also reduce power consumption. We’ve got electricity supply companies paying for the retrofits as they can sell the power elsewhere. Also you can never trust labels on HP/LP controls!!!

[@throttlebottle5906]

retrofit today and be worse off tomorrow! but if only good parts, techs and operators were available.

[@halverde6373]

Driers are only good for 24 hours. Eliminate them completely afterwards. Just remove the suction cartridge and cut out the liquid line driers. The TXV has a cage to catch any crap from installation. It's a SEALED system! What do I know? Member RSES, CM,CMS Tx license TACLB-004153-C. Thankfully retired.

[@HVACRSurvival]

No, this $1k Txv is completely sweated in and does not have a removable screen, and on rack refrigeration we leave filter dryers in all the time to continue cleaning the system especially after idiots did the shit work that you just seen after not properly diagnosing why all four compressors have been replaced. Also just so you know RSES is nothing more than a membership. It doesn’t mean you know what you’re doing. Just like most other memberships but what do I know. Oh and by the way, I’m RSCS certified too whoopie. Humility goes a long way, you should know that by now if you put 40-50 years in. no one knows everything, especially when you don’t stay on one type of unit nonstop.

[@commenter5469]

Flow sensors most likely 4-20 mA, 3 wire

[@HVACRSurvival]

You’re likely correct. Every time I got to this location which was new to us it was at the end of the day. The first trip didn’t have a manual or supervisor available. It was and is a pos needing cleaned up.

[@prothermal_refrigerationHVAC]

👍🏻

[@joea2274]

A video ❤

[@ValDominator]

You feeling weird? You don't seem as fatigued as you usually are

[@HVACRSurvival]

I didn’t run any calls last week. I was off, replacing windows every day until 1130 at night also doing three or four videos which I only do one a week. And there’s a reason for that. And I don’t plan on doing that many again like this. Otherwise, I’m great.

[@throttlebottle5906]

480v rarely just goes "BOOM", it usually goes BANGZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZT as you go pooooooo in drawers until the breaker or fuse blows. especially without it being an 100% solid dead short. I know all too well and personal

[@HVACRSurvival]

I prefer to not see it in person. Fluke video was good enough. 😁

[@throttlebottle5906]

pressure port before and after. just check temperatures? surely that's all they did long ago, with huge latency or they wet clothed the thermometer against the line(mercury bulb) and wrapped with leather to slow absorption and surrounding air effecting it. I.R.L. we've come a long way from using blocks of ice. 🤣 too far really.