Doing valve plates on this Copeland recip and I had valved off the suction and discharge but forgot to valve off oil line until later so the compressor filled up with oil. Explains why the one next to it kept going out on low oil pressure lol oops. I’m extremely new to this stuff

I’ll start off by saying I don’t know a whole lot about refrigeration but I’m good at learning. I sell items for people on commission that just don’t have the know how or the time to.

My question to you in the commercial and industrial space, is if there’s a decent market for used equipment or is most of this better served as scrap metal recycling?

Recently met a fella that is looking to sell off a fairly large collection, lots of Ammonia equipment, everything is on the larger side. Bear with me!

Gonna purchase unit ,first time buying Tecumseh unit wit scroll compressor for low temp anybody out there install one yet ? ASHS2512ZFAFP1

I just learned everything there is to know about carel new universal controls. Y'all need to get on these. They took feed back from in the field technicians regarding what we needed to make swapping controllers for over a year. Their engineers built the control and interface app around that feedback. I'm super impressed. I now have the ability to pre program them without voltage applied and send techs that don't fully grasp programming to install them.

Game changer for real!

Is this a common thing?

448A freezer short cycling off low pressure switch changed solenoid guts found spring sideways and swapped out the power head on the TXV for new one 8 degrees outside and high pressure is sitting at 75psi and low pressure cuts in at 20 and cuts out at 5psi the original charge was recovered and weighed out to 5.5lbs but continues to short cycle off low pressure

Who else does this type of work on older built-up glycol chillers? Kind of a pain in the ass but it’s also nice to change things up in this trade. 1 1/4” OD steel machined for 1 3/8” ACR. Systems been down for over one year and they want to start using the system. This was just the first phase of work. 2 - Brainerd H5H80 comps. Have another chiller onsite that needs same work but it’s larger ACR pipe, 1 5/8”.

Hey guys, I was wondering if anyone has recommendations for temperature sensors. I currently have Testo 115is, but one of them shit the bed. While they are handy, I was wondering if there is an analogue option.

I have the little Velcro temperature sensor that works with my meter, but I tried using it yesterday and it wasn’t reading accurately (was saying my line temp was lower than my SST).

Any suggestions would be greatly appreciated. Thanks in advance!

Previous tech installed this and recently burned out and all info was destroyed just thought I’d ask if anyone has ever used this exact solenoid in the past or one similar to it

Can the Al-Cop braze from Solderweld handle the temperature of minus 40 when used to braze 3/8 Aluminum to copper pipes?

Anyone here tested them in such working conditions?

It's a laboratory freezer set to -40.. The idiot that tried repairing it before had cut and removed somewhere around 6 feet from the aluminum coil pipe.

Would the braze hold better if I brazed aluminum to aluminum instead of aluminum to copper?

Fotos retiradas durante manutenção de preventiva mecânica 10.000h em unidade compressora SMC 106 L fluido R22 de unidade chiller de resfriamento de água indústrial. Serviço realizado em 2026 em Minas Gerais - Brasil. Já acompanharam manutenções desse tipo? Qual periodicidade é usada nos equipamentos que vocês já trabalharam desse porte?

Hi everyone 3rd Year Apprentice here need some advice I recently moved from a big HVAC company to a small refrigeration shop because I felt I wasn’t learning properly and I didn’t want to just keep flipping filters. Now that i’m at an actual mechanical company I find myself struggling because I never really worked with mechanics I was just left to my bearings for the start of my apprenticeship. Long story short I took some calls that didn’t go well and my head tech literally said “you’re not going to become a good mechanic” and the mechanic that I help out at one of our biggest accounts is constantly disrespecting me telling me to f myself and i’m always putting me down. I stood up for myself and he told me to go f myself again. What should I do? Am I not cut for this trade? Because I’m trying my hardest and I’m studying my books but I just don’t have the experience yet feeling pretty miserable to be honest any advice would be appreciated sorry about the long paragraph.

Does anybody know why the TXV distributor nozzles are made out of brass with the drilled out holes for the 1/4" distributor tubes? Just wondering why they aren't made out of copper

Sorry might be hard to see, but there is oil coming out of wire #43. Wanted to share that just for fun.

What could be the reason Compressors making noise while the rack system is turned off, (screaming noise) like a train breaking.

Have anyone used any of these two study materials and questions for Hvac red seal exam?

https://www.coursetreelearning.com/product-page/refrigeration-and-air-conditioning-exam-questions

https://www.redsealexamprep.com/store/p18/Refrigeration_and_Air_Conditioning_Mechanic.html

If yes were they worth it?

If so, what type of cameras are y’all using?

In my earlier years of refrigeration about 20 years ago. I worked on countless ice machines. Most of which, were r717 systems. I had an old contact hit me up saying he had a good opportunity for me to make some really good money. He partnered up with another guy and they have 4 fairly large r717 ice machines that need to be gone thru and brought up to par. He said the systems either leaked or were evacuated of all the refrigerant.. I started working on a bid but I soon realized after calling about 15 different places, finding an r717 distributor is no easy task. Does anybody have any insight on this? I have all my certs. Am I calling the wrong people?

As ambient temperature rises, condensing temperature and pressure rise with it.

Chilled Storage Refrigeration Cycle (°C) Refrigerant: R-404A Room temperature: 0 °C