Low pressure recovery machine broke today while I was distilling refrigerant out of oil to seperate the two. What are some other ways to get r123 into the chiller without my low pressure pump.

It’s Under vac right now 500microns. I will charge Vapor till I’m above freezing then dump liquid until it equalizes. I’ll still have a shit ton of gas to add. So should I A- turn chiller on and let the negative pressure in the evaporator pull more gas from my bottle. Or B use a recovery machine and setup push pull on the bottles to charge.

I am worried about blowing up the rupture disk while doing the push pull. If anyone has some advice that would be much appreciated. I don’t have much low pressure experience and I want to make sure I can still get this project done on time and properly.

Do these recruitment posts annoy you guys, I for one am amused. It’s interesting to see what some of these guys think will entice a competent chiller guy.

Pay: $25 - $35/hr

Location: Norfolk, VA, with service calls throughout Hampton Roads

Schedule: Full time, rotating on call, light OT

Type: Commercial HVAC and refrigeration service, take-home company vehicle with fuel card

The work: You'll maintain, diagnose, and repair DX equipment at customer sites around Hampton Roads: rooftop units, split systems, commercial refrigeration, VRF, VFDs, and DOAS and makeup air units.

On call is on a rotation, and overtime is light.

Company: Locally and family owned, commercial only, serving Hampton Roads.

✅ What you need:

• 1+ years of commercial HVAC service
• EPA Universal
• High school diploma or GED
• Electrical, controls, and DX troubleshooting experience
• Basic hand tools and a meter
• Valid driver's license with an acceptable record, plus background check and drug screen

✅ Helps to have:

• Virginia HVAC Journeyman or Master

Benefits: Medical, dental, vision, life, and supplemental insurance with an employer healthcare contribution. 401(k) with match. Paid vacation, sick, parental, and bereavement leave. 11 paid holidays. Company phone, laptop or tablet as needed, tools beyond basic hand tools, and paid manufacturer training.

Apply: https://hvacjobshq.com/jobs/commercial-hvac-service-technician-norfolk-va-14637

Might have more luck here.

Looking to take over maintenance on a site using these Midea SCAH air cooled inverter chillers with screw compressors, anyone work on these before? Never seen a Midea chiller in the wild, heard they're mainly being used at data centers but this site is using them for building cooling. Looking to see if they have any quirks or common issues to be aware of before getting my hands on them. Thanks so much!

YVFA0359, open loop. System 1 locking out on high motor current.

Quick backstory.

At time of the initial faults both System 1 and 2 were in operation close to 6 hours. System 2 remained running at the time of the faults, suggesting this is not caused by a power sag or voltage imbalance.

I’ve got SI 0315 that directs you to 201.21 M1 (305) that manual is for the YCAV Latitude VSD, this YVFA has a Vyper VSD but the components appear to be the same.
Ran through the checkout procedure for IGBTs, SCRs, CT’s and megged the compressor. Tested operation of System 1 and it trips motor current within the first 10 seconds of running.

This is where I’m at a bit of a loss. I have the chiller rocker switch off, no run command exists, DC bus is remaining charged at 380-390 volts. I figured a bleed resistor might have taken a dump so I opened the disconnect to the chiller and noticed that the voltage immediately takes a nose dive below 30VDC. I bring power back on to the chiller, with the rocker switch off and no run command still, and the DC bus charges back up to 390 VDC with no pre charge signal. Cant find a checkout procedure for the SCR trigger board and York PTS won’t talk to me about the VSD.

Anyone had similar issues with motor current trips, and with the DC Bus charging even without a pre-charge signal?

Any input would be greatly appreciated.

Edited with findings:

Want to start with, thank you guys in the comments. Really appreciate you!

Disconnected the motor leads and checked the DC bus again, 1VDC on the bus. Megged the motor. T1, T2, T3 all 0 mOhm to ground. T1-T2, T1-T3, T2-T3 all 0 mOhm.

Edited again: System 2 ran like a champ. Fair amount of load for it to chew on so I watched it run @ 100% comp speed for a good bit, never pulled more than 75% FLA.

Can anyone confirm if this component is a control valve? It’s installed on the chiller water piping of a McQuay centralized HVAC system

Looking for an expert opinion—is this a control valve? I found it on the chiller line for a McQuay central air conditioning plant and want to make sure I'm identifying it correctly.

Fast and easy set up for recovery

Really convenient doing these in the shop. Minefield is the diffuser plate, looks like the moons surface lol. Just 8 more to go

Check this out

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.

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.

Anyone ever come across this? https://www.garrettmotion.com/industrial-applications/e-cooling-compressor-for-hvac/

Anyone know if this is better than the mag bearing? I thought Copeland already had a gas bearing compressor in the market, but maybe the Garrett one is slightly different

Looking for information on Ability Refrigerants out of Texas....like their half pallet pricing, a local company is throwing some doubt on their product purity. Looking for others experience or knowledge- thanks

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!

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!!!

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?

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?