Brazing in a new eev on a R290 chiller.

All about keepning the green fella afloat. Have a nice day.

Are there any in house techs that work in storage sites, with Ammonia and co2. They don’t do major repairs onsite.

Is it a good gig to increase my skills? Or better to stay in light commercial resi hvac?

Anyone using these controls and seeing sensors go offline? I’ve used the SC255 and SM880 with no problems, but I’ve had a few issues with the few SM880A controls we’ve installed.

Hi everyone, We’re a refrigeration company in the San Francisco Bay Area looking to start offering preventative maintenance (PM) plans for commercial kitchens.

For those offering PM plans:

•	What do you include?
•	How often are visits?
•	Do you charge per unit or flat fee?
•	What’s your price range?

Any insights would be much appreciated

R448 cooler condenser, are we trying to clear sight glass when it gets cold out? When I charge I go by Saturation temp on highside. Although first thing I check is if the liquid is hot to see if Headmaster is bypassing gas to txv. Anyone got tips for winter charging, and how to bypass headmaster? Documents and pics help too. Thanks guys

Even if you put in right in the vacuum pump still give me the Oil middle finger

Someone else ever had this problem?

It's an uniweld uvg.

We trying to set auto proofing on our hobart proofer, the confusing part is that its says will be done proofing at 2 am, shouldn't say will start proofing at 2am? TIA

Hi everyone,

I was hoping you could help me. I am a sales engineer within the refrigeration industry focusing on industrial and commercial refrigeration controls.

My knowledge is very much in the background of controls and I would really like to increase my understanding of refrigeration principles and the refrigeration cycle. I also want to increase my practical knowledge of refrigeration as much as possible, although I know that is difficult without a field job. I would like to understand the theory and practical in as much detail as I can so that I can best assist my clients. I was just wondering if you could share what you think would be the best textbooks or resources?

Thank you!

I’m a first year restaurant maintenance tech- recently our Taylor Y754-27 has stopped freezing the mix coming out of the chocolate hopper. Apparently this has been an occasional problem since before I started, but the usual remedy (hitting the reset button on the board) is no longer working. Besides a lot of filth on the interior components, nothing is standing out as broken or worn out and I could really use a hand In diagnosing the issue. It gets cleaned weekly but besides that it has only seen the bare minimum required to keep running before I started here. SOS

Hello everyone!

I'm curious about the really crazy lab freezers that hold precious materials super cold.

In the day of a refrigeration repair person, could you be at a grocery store on one job, then at a biotech lab fixing something in the same day? Or are there companies that specialize in just these types of freezers?

Thanks in advance!

Hey folks,

I'm writing my exam in two weeks; was "encouraged" to do this instead of attending the class because (quote) "You're way past needing class". I regularly work on large chillers, grocery store racks, etc; been doing it for several years now.

Well, I've read through the materials and I can do all the practical things, I have a good grasp on the theory (Gas laws, PT charts, Pres-Enthalpy, psychrometry, etc).

I've got two big questions and I'm waiting for an answer from the school.

1: Do they let you have a codebook?

2. Any recommendations for online tests to take as preparation? Looking for some examples so that I can assess where my weak spots might be.

KE2 and S3C's etc . Whats the best method and instrument to verify suction transducer and coil out sensor are reading correctly ? Iv just used my fieldpiece and its seems accurate enough . I have a whole store with s3c's for every case so getting every case within 2f degrees of the setpoint while having no access to change parameters has been fun ! I dont really agree with how they have the valve control types set for . My reach in freezers can have 4 cases on a circuit , each case has 2 coils 2 eevs, one epr for the whole circuit and the valves are set for eepr controlling temp/ pressure and eev control is superheat

iykyk , each case needs to be tweaked slightly to hit time in target and Personally I think setting them to eev control temp/superheat and Epr control to only pressure would be able to achieve this easily .

Iv seen lots of fun ice build up on eevs and certain cases goin down too often . Bad eev's stuck open and sensors reading 5 off can cause floodback , erradic temps, defrost issues. iv thought maybe this is causing premature wear on valves from opening and closing too much as well .

Im finding Suction transducers can be as much as 5psi off , there is a transducer for every coil and they rarely read identical from coil to coil case to case . This combined with coil out Temp sensors being off a few degrees plus Im pretty sure the epr is using an average of all the transducers that arent reading right and my conlcusion is all the valves are fighting eachother.

Im sort of ranting now but im curious what everybody thinks .

How should I replace temp sensors? Can they be spliced in(assuming ofc its the sensor not the wire thats the issue) , can i make some sort of plug , or are we always supposed to run a whole new wire ?

Im learning refer, I know the refer cycle, work on reach ins/walk ins. But some of the more confusing things are dealing with different mfg equipments especially ones you dont consistently run into. Anyone know how I can read up on traulson literature especially the controllers? I used to be so scared of the reach ins because I didnt understand the controllers, but after repetition im much more comfortable working on stuff with Dixell controllers or Lae. Now there is Traulson ive been running into, but I cant seem to find wide literature to learn more. Anyone got more tips on how to get literature access to Traulson's controller and manuals? I tried looking online but didnt get clear info not sure why

Cleaning out the workshop and found these. I'm actually too young to have ever used them but my father and grandfather used them. I'll stick to my fieldpiece wireless scales thanks 😆

Problem ice machine keeps tripping breaker. This part is leaking water. Could this be the problem? Manitowoc

Currently finishing up school to be an aviation mechanic and I’ve decided it’s not really for me. I’ve had a couple jobs over the summers and winters working in the industry and I’ve found I haven’t enjoyed it as much as I thought. I found that there is lots of inspecting and looking at things making sure they’re in good condition and not as much being hands on as I’d like to be. I also find there is a lot of waiting around which I can’t stand because it just drags the day on so long. Refrigeration was gonna be in if my first choices but I did not know much about the trade. I’ve done some more reading about it because I’ve been thinking of switching over and it seems like I’d enjoy it. I’ve got some questions that maybe could be answered here

1. What’s a day in the life like? Are you guys being very hands on and troubleshooting things? Are you doing lots of waiting around for jobs?

2. Is there lots of shit work? Obviously there’s shit work with any trade especially being apprentice and I’ve done my fair share in the aviation world and it sucks haha. But it seems like no matter what stage you are at as an aviation mechanic you’re still doing lots of cleaning. I obviously expect shit work in refrigeration but I’m just curious what it actually entails so I know what to expect.

3 is starting your own business a realistic thing. I’ve always been driven to have my own business one day and I’ve found out talking to a lot of people in the aviation industry that it’s not really worth doing if it’s just general maintenance. I’ve always thought that maybe it would be more of a realistic thing to do in refrigeration especially if I enjoy it.

Thanks for answering any of my questions and giving me more of an idea of what the trade is like!

Im new to the trade and have to invest in a new phone. Something that integrates well with apps and programs used in the field, and tough enough to survive cold weather. And all the things I have yet to think of!

What do you recommend?

What are the best YouTube channels to learn refrigeration?

I was at the training center today and picked up the Milwaukee vaccum. Thing is light as holy hell. When is that cocksucker going on sale?

what would you guys consider short cycling.

cut out -3F cut in 5F runs for about 10-15mins on and about 10-15mins off approximately 14HRs a day run time.

most of the heatload I calculated was from the box being old, poorly sealed, 2.5" walls.

I supplied the reefer they supplied the box.

does this pose an issue. Currently the customer has limited stock, they have not loaded the box up. this will likely change once they start holding more stock.

Should I span out the cutin-cutout. Or not worry about it.

Hi folks it's me again the third world technician who always make you laugh.

Today we're piping a 70 ton Keep rite condenser with a 2 1/8 pipe in suction

Anyway look at my welding and comment how can I improve.

Not I'm not welding with nitrogen in the system my boss says that's to expensive and costumers not consider those features when it's time to pay.