r/chillers

Image 1 — need help with old centravac
Image 2 — need help with old centravac
Image 3 — need help with old centravac
Image 4 — need help with old centravac
Image 5 — need help with old centravac

need help with old centravac

i keep having high purge count/ purge max time exceeded. well it happened twice this month after they had cooling tower fan problem. this is the only centravac I've seen and possibly the only one this vintage that is still running in my area.

I've talk to a more senior tech and he think i have non condensable issue.

what do i do and where do i start? I've leak check around the high side and no leak that o detected.

it does have oil leak from the oil filter area. can that be a factor for non condensable? I'll tighten it when I'm back on site.

u/blitz2377 — 4 days ago

Good afternoon fellas

So with JCI, I had a virtual interview and they never joined, so I thought it was over. They called me today, told me they knew I wasn’t a journeyman but were still interested. He asked about my troubleshooting skills, pipe fitting/plumbing experience, and compensation, then said he was sending my information up to his guy and gave me his name.
He also mentioned a Service Man position. I talked to a chiller tech at JCI before, and he told me Service Man was how he started. It’s a 3rd-year position, and they can turn you out as a journeyman within a year. He said that’s exactly what happened with him. I’m interested, but I don’t want to get thrown to the wolves.

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u/Horror-History-6094 — 4 days ago
▲ 177 r/chillers+1 crossposts

Word of advice for the new techs. If you don’t see techs 45 years old and up at a company don’t work there. If there are techs 50-60 years old definitely work there. A company that retains older technicians means they don’t abuse the techs. Trust me .

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u/BullfrogOld8440 — 6 days ago

YVAA DC bus voltage imbalance

So as the title states I’m having a fault code on a YVAA, I called York tech suppourt and was not pleased with the language barrier. I’ll leave it at that lol. After troubleshooting I changed the bleed resistors just to be safe.

The chiller will run for 15 minutes, then 5-7 minutes then eventually won’t even pre-charge. Is this symptomatic of capacitor bank slowly overheating as each start occurs? I’ve checked all boards, incoming voltage, ohmd line reactors and megged each line reactor to ground.

I’ve found no issues and kind of stumped. A new drive has been ordered but wondering if there’s anything I can do in the meantime?

Thanks in advance!

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u/Connect_Emergency809 — 7 days ago
▲ 0 r/chillers+1 crossposts

In search of: HVAC-licensed Field Service Technician for an Atmospheric Water Generator startup

Hi y'all I need a HVAC-licensed Field Service Technician! I lead the Customer Success/ Support team at a startup that makes water from the air, filters it and helps customers gain complete water independence. In the face of growing water scarcity, our business is starting to scale, and consequentially so does our need to support our customers in the field around Austin, San Antonio, the Hill Country, Gulf Coast, etc., with day trips and overnight visits expected on occasion (of course we pay your accommodations and reimburse for gas).

Why do we need a HVAC? Because our machines are typical heat exchange systems, except they are made to make water, not cool spaces. Though you would work alongside some other mechanically/ technically-inclined folks on the Operations team, you would be the subject-matter expert on HVAC. We can teach you our systems, about the components that make our system unique, but this hire would be the first HVAC-licensed hire. Lots of troubleshooting, brazing, soldering, compressor swaps, refrigerant recovery, etc. etc. is involved here: we are open to conversations with people who are more entry-level but be advised, there will be a technical portion that requires demonstration of the aforementioned. Therefore, this job is a great fit for candidates who already have at least some experience in the field and are confident they can execute the duties of this role.

About 75% of your day will be in the field, reacting to service calls that you are dispatched to or performing preventative maintenance on customer machines. The other 25% of the time will be spent in our warehouse shipping and receiving, taking inventory, refurbishing machines and doing whatever else pops up throughout the day.

Check out the job posting below and DM me if you want to speak to the team!

https://apply.workable.com/aquaria/j/22242B6DAF

**Sigh** inevitably, bc this is Reddit, someone will make a comment about us being a "scam" company who just does what your AC unit already does. If your AC is outputting 60-250 gallons PER DAY of clean, potable water, congrats you have almost accidentally invented an AWG minus our proprietary filtration process/ components/ software/ firmware/ hardware that makes it a viable, marketable product. If you've figured out how to do what we do, my hat off to you but kindly go share with the world your findings and spare the Reddit toxicity here. Thanks!!!

u/aquaria_awg — 9 days ago

Hope y’all are having a weekend

I applied to JCI for a Truck-Based Journeyman Mechanic (union) position without really paying attention to the requirements. Somehow I got moved forward and have an interview Tuesday. 😂
I’m 19, not in the union, and obviously not a journeyman. Would y’all cancel the interview or take it as an opportunity to be upfront about where I’m at and see if they’d consider me for an apprentice/entry-level position?

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u/Horror-History-6094 — 13 days ago

Looking to learn

Recently did a coil swap on an air to water chiller this past week and it made me wanna learn more about them. I don’t know where to start, buddy of mine told me to learn about condensor and evap approach. Any tips or things to read/buy so I can learn?

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u/Sea_Pilot_320 — 12 days ago

York YCIV drain valve

A coworker and I recently replaced a drain valve on a YCIV from the old to the new style and it kept tripping on low superheat. We found a bulletin that the wires need to be reversed so we switched red and white and then switched black and green. This allows us to now properly actuate the valve manually at any percentage, but when put in Operation it doesn’t open and stays at 0% until it trips again on low superheat.

We opened it to 30% and unwired it to leave it there and tried running the system and it ran fine from there. What are we missing? It seems like the unit just refuses to call the valve to open for some reason.

EDIT: all transducers and thermistors are verified accurate. I found the suction transducer was bad on start up but that’s been replaced and issue remains. Charge was weighed in after repairs, and we verified the valve does move from 0-100% and back from 100%-0 in service mode in increments of 5% at a time.

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u/stirling1995 — 14 days ago
▲ 4 r/chillers+1 crossposts

Hi brothers in hvac, apprentice here again. Can you guy’s help me get the concept of this chiller circuit ?

This was in the cooling tower . I’m in the electrical stage focusing hard on getting it down pact.

u/HVACGUYLOCK — 13 days ago

arctic chiller high inverter temp issue

hi all, I got an Arctic chiller that have high inverter temp alarm issue from time to time that I couldn't solve. it's 125 ton unit running in hand mode with set point of 41F

i notice it would have this issue when speed is low. from what i see the inverter cavity is cooled by constant flow of liquid into an orifice. I've talk to other tech in my company and he mention i should lower the sub cooling down to 8F from 12F.

any one have run into similar issue in the past and what could i do to remedy it?

u/blitz2377 — 13 days ago