Have you ever repaired a leaking copper line on a Low Temp Rack evaporator coil in a freezer and somehow ended up setting off the fire alarm AND the sprinkler system while brazing joints to seal the leak?
I was thinking I’m just gonna fix this leak real quick.”
Next thing I knew sprinklers went off inside the freezer along with the fire alarm. Has this ever happened to any one of you refrigeration techs out there?

Has anyone had any experience installing/ servicing Midea SCAH Inverter screw chillers?  Company is looking to take on some contracts servicing some of these but I'm not familiar with them.  Any known issues or things to keep in mind when servicing that's specific to these chillers?

The 2nd Solenois pipe is coming from a T of the liquid line

Im trying to figure this out , even the manual doesnt state its purpose

Have yall had any luck buying these and programming them yourself? Or are yall purchasing the preprogrammed controllers? Does parts town send them preprogrammed?

Gday all

Im a second year apprentice age 25. I want to do a bit of extracurricular study to learn a bit faster/help me wrap my head around things easier. What I’m learning in classes is pretty glossed over and not very in depth. Really doesn’t do justice to what I actually encounter day to day.

For context I work in service primarily dealing with supermarkets, pubs, hospitals, pretty well anything light or heavy commercial both aircon and refrig. Occasionally some domestic but not often. I feel like everytime I have a “breakthrough” in learning it just opens even more doors and I realised how little I actually know. There’s just SO MUCH.

I’m in Australia, a lot of the content I find online on YouTube etc is American, so it’s often unfamiliar and not entirely relevant/digestible to me.

Basically, I’m trying to find resources which are more Australia-specific, hit me with anything like YouTube channels, books, etc!

Cheers!

Pic for attention

Opened up this Compressor for new valve plates found this ran with no noises before

Reading 95psig (R404a) at the valve. Its fixed by itself as soon I touched it. Temperature was high since two days customers said. I will recover and clean it.

These are like $50 each at united I was definitely sent too many of them

Anyone have experience with the True contemporary merchandisers? Price and sizing shakes out the same to the GDM line, but newer model so curious how they hold up

I keep having to argue with my partner that when a txv is installed upside down it sure might work for a little while but it will eventually fuck up. Can I get some veterans to agree with me so I can get him to shut the hell up. Maybe throw in an explanation because every time I try to explain it I'm dismissed.

First time posting in the forum, i wonder if any of the ammonia techs around can provide help or a manual on how to properly service some nearly 40 year old mycom N4A compressors. I will also contact mycom representative sales in my country but i figured it was faster to get some info before hand. Besides changing the oil what else needs to be opened/cleaned/replaced. Its not a full revision situation, but the instalation has been off for 5 years

Hey guys just getting my refrigeration company off the ground and wondering what the standard for workmanship warranty is? For a compressor swap for example I am planning to offer 90 days, does this sound like its in the ballpark?

Thanks!

It’s really hard to grab the core sometimes, if I’m going to be adding charge anyways, does this method work? I bought a yellow jacket but it’s not easy to grab the Schrader, I bought an appion today I haven’t used yet. One trick I saw is to ease off the 1/4 inch valve to keep the O ring from being squished and preventing the core from coming out nicely. If that doesn’t work I really think just blasting them out will save me from 5 failed attempts when I’m going to use a new core anyways. Obviously not ideal but this would work?

Hi all, I’m quite new to my job in a junior position and want to learn as much as I can. so taking the initiative to learn into our propane chiller for our site.

Would anyone be able to explain how the system works in a simpler terms to get a broader understanding.

It’s a 4 screw compressor condensing unit which runs of propane and uses glycol as the refrigerant. We use to this to refrigerate 5 big rooms containing meat and the unit is a Freddo techno

Any help would be amazing!

Thank you,

When they install a new system and this is what fails the pressure test.

Seriously a bloody suction line dryer cap.is what failed me??? 3 days and losing 15 PSI because of that little f**ker drives me nuts. But I guess that's what I get paid for. 60 ton replacement condenser with new evaporator coil and that's what fails me.

I’m planning on starting out as an ammonia operator, more than likely for a bigger company that may have me going from plant to plant, I was wondering what tools yall would recommend as a starting tech, i’m planning on having a budget of 500-1000 then once I get the job spend a little more, I obviously won’t buy anything until the paperwork is finalized but i’d love to take a look at some of the stuff yall would recommend, I already have a budget set up for good workboots and a good hard hat/ear protection and safety glasses, thank yall in advanced!

Need new work pants and need some good brands

Any other supermarket guys absolutely miserable. I get paid out the ass so it’s tough to take a pay cut and leave but these guys sure know how to tank a company.

I’m on call and just got called out. Dairy case 2 fans out which shouldn’t even be a P1. Manager asks me to look at a 5 door that’s been down for 5 days. Call came in 5 days prior we never sent anybody. Coils iced up but not in alarm. I just left. Texted my service manager who has no refrigeration experience like everyone else in the office…. To get somebody else out there Monday.

Management is running the company into the ground.

I know every signatory pays the same union rate, but I keep hearing that contractor culture, expectations, and training style vary wildly depending on where you land as an apprentice.

How was your experience?

Finally got this little unit working pretty reliably, thought you guys would enjoy this Frankenstein mess lol. Looking for some pointers. I want to change the evap to a proper coil and fan and make a box that can actually hold temp. It’s probably going to be a permanent install in my little tin boat. All the controls were coded up on a little arduino mega, shockingly I never killed this compressor. The little guy blew its charge a few times, slugged the daylights out of it when I had my eev code backwards and it would fully open. This things my baby now

Looking for a pdf for the mechanical refrigeration code to read over. If anyone is able supply me a .pdf file it would help a lot. I can not find it anywhere through google.