Walk in Cooler low pressure control problems

This was a service call on a walk in cooler that was at 60 degrees, the system had a bad low pressure control, I replaced the control and the system was back up and running.
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[@lee-johnson]

Finally, someone loosens the packing nut to operate! Five stars brother

[@HVACRVIDEOS]

Thanks bud

[@xzearr]

Its always scary to loosen the packing nut open, especially on old ones. They never turn back the same 😅

[@erikespino5942]

I didn’t know of loosening the nut on the king valve to protect the valve. Good stuff.

[@OcRefrig]

Pre-set Your Pressure control with Dry nitrogen down at the truck & your analog guages. saves a lot of time , rather than messing with it on the roof.

[@xraybravo7180]

Can you create a video about this then ?

[@videos10]

Explain with video, I don't understand

[@donaldhickson2400]

I would love to see how this is done

[@larryproffitt4729]

Short cuts while using common senses equals win win for you and satisfied customer. Really enjoy your videos.

[@HVACRVIDEOS]

Thanks bud!

[@DavidHarsant1]

didnt know that about the packing nut, been in the trade almost 20 years, learn something new everyday.

[@apr9286]

I like how you take the time to break down the details of your services you do. Thank you for sharing.

[@cruzfernandez4554]

Awesome video! I was looking for this information all over on how to replace the mechanical pressure switch without having to lose pressure to avoid noncondensable entering the system. Thank you!

[@markhoffmann5941]

is the small amount of air in the pressure switch connecting tube negligible??? the system was venting during the quick connection but i am assuming air was not removed from the pressure switch tube.?? just wondering..

[@jjjames5089]

I appreciate your detail in the work you do, and in the description of what and why. Its refreshing. Great knowledge.

[@topgaragedoor6860]

This is great video showing real efficient way to change out the pressure control. I like the subtle detail about the 6psi left in the system to do quick change out of the flare fittings.

[@gregob-team4642]

Nice fix I like how you save time to and the trouble of changing the filter dryers out and vacuuming it

[@damiangul9384]

Love you're channel I'm new to the field about 2 months fresh out of technical schools keep the vids and information coming greatly appreciated

[@drinktillwerefunny]

Great great great video. Very basic, educational and simple. Nice trouble shooting steps, all described really well. I am from a Stand alone background. 1/2 hp reach ins and such. THere is so much SPACE to work on the remotes!!! This clip totally made everything seem so simple once again. great video!

[@gloiban]

You're videos always get me out of a bind. Thanx from Vegas.

[@HVACRVIDEOS]

Thanks for watching!

[@colbyforest975]

Hey man, keep up the good work. Love your videos because they are motivating and very educational for a younger tech like myself. Thank you!

[@davetatro478]

Funny I did this last week as well same problem. This method is great way to do that and also replace a flared TXV🤓. Refrigerant is only a little bit of vapor escaping the system. Got to do it fast so no moisture or air gets in. Surprised the J/C control failed, usually it’s the cheap rancid or Danfoss ones. I enjoy your videos Chris!

[@HVACRVIDEOS]

It was actually was a ranco control personally I hate the ranco controls, but I decided to put the ranco back in because it fit perfectly. Thanks for watching and taking the time to leave a comment!

[@lancerudy9934]

You have excellent videos . Thanks . The pump down at 6 pasig is only vapor!

[@jrchevy2500]

Just got into commercial. I appreciate your help! Thank you!

[@airmechanical7163]

Great tip. Always look forward to your videos !

[@Akvan79]

Chris tip of the week check you cut in and out of your low pressure switch. Good advices.

[@prothermal-ca]

"we need do good vacuum and use big hoses" same person: we just can swap pressure control with air inside tube, no vacuum needed)))

[@RobRocker09]

Taking a short cut was great. Checking the temp on either side of the dryer. Wouldnt it tell me first if the dryer is good. If not it would need replacing.

[@bjornschamle6738]

thanks for the good explanation I just started as an air conditioning mechanic so this video was very useful

[@gene-khvacr]

Always enjoy your vids on call going in now to a walkin condenser short cycling erratic according to mgr hop[e you do a vid on short cycling issues looking forward man 👍👍👍

[@seymore2000]

Kickn -it-old school and keeping it real keep up the good work

[@HVACRVIDEOS]

Thanks for watching and taking the time to leave a comment!

[@hvacworx7414]

Awesome video, man! Thanks so much for breaking the troubleshooting process in the beginning!!

[@frontiermarvin71]

Great video! Exellent presentacion ! Thank you for your time and knowledge

[@winkhvac62]

I start pick up Restaurant work, Excellent presentation !

[@deanmohamed7575]

Wealth of information here. As usual, very thorough and informative! Thank you sir.

[@HVACRVIDEOS]

Thanks for watching again!

[@jamestoy426]

Thanks learn a lot from tour videos using just basic trouble shooting techniques

[@HVACRVIDEOS]

Thanks for watching and taking the time to leave a comment!

[@a.per9612]

Great video! Thank you for your time.

[@Harrypizzalover]

Awesome tip man can’t wait to try that , 👍🏻

[@Cheez1979]

One of my favorite new channels..keep up the good work !

[@HVACRVIDEOS]

Thanks bud

[@Alex-nf5go]

I wanted to thank you for those informative videos.

[@inoahmann7542]

I have a system that has one broken low preasure port, one at the evaperator (inaccessible) and one with the preasure switch on it. I guess I have to take the low preasure control off to charge it. Fun times. Why is all of the equipment on KZbin so nice and the stuff I see is 15+ years old and trashed, lol.

[@edwinandujar9099]

Awesome trick with the low pressure line swap wicked time saver

[@HVACRVIDEOS]

Thanks bud!

[@jlchilapa]

Thank you for the great job you are doing sharing your knowledge.

[@HVACRVIDEOS]

Thanks for watching bud!

[@seanmcdermott5718]

That's a Badass tip ! Can't wait to try it out there

[@aircooledtx]

Good to test in-out. Good job.

[@DanO181919]

I can’t believe I haven’t subscribed to your channel sooner. Great Channel!!

[@HVACRVIDEOS]

Thanks !

[@nakiapringley5391]

Awesome break down. Much appreciation brother, keep videos coming

[@Brisket9392]

When bypassing low pressure control to force the unit to run in an emergency, make sure you also turn down the thermostat and check defrost controls so it doesn't close solenoid and run in vacuum while you picking up the part.

[@donnierobertson3088]

Great job again like always

[@nixcoolfix]

Great video with great information! Thank you!

[@deafhvacrsocal5292]

Just read commerical refrigeration book by Dick Wirz about packing nut, great stuff, sir. the book also said to closed afterward after done repairs. keep it up with awesome video, thank you Chris.

[@squirtlehvac8962]

DeafHVACR SoCal what edition? I just bought the third edition and it’s been great so far. Haven’t finished it yet

[@deafhvacrsocal5292]

@@squirtlehvac8962 second edition bpok

[@NOEISY1]

I'm a student , thank you so much for teaching us

[@HVACRVIDEOS]

I'm glad you enjoy my content, and thanks for taking the time to leave a comment!

[@johnragusa4820]

Awesome video always learn something new after watching. .

[@davepenprase]

Thanks nice video and thanks for the explaination at the end. Well done

[@JeWfRo815]

Great video!

[@romulopastora8834]

I have learned a lot from you .thanks for share your knowledge..

[@HVACRVIDEOS]

Thanks for watching!

[@bonganiedwardmthethwa6455]

Thank you for the informative video

[@reyveltrejo6039]

You are awesome and very good explaining

[@HVACRVIDEOS]

Thanks bud

[@robertarnold6672]

A really good video on the pressure control switch. I liked the technique of keeping a positive pressure on the low side so that you keep air out of the system while installing the flare nut & cap tube assembly. I am assuming we would want a walk-in cooler pressure control to kick in at 40 degrees & cut off at 35 degrees, hence the 5 PSI differential.

[@sebastiannielsen]

eeh controlling temperature solely with a pressure switch? Sounds a bit wrong in my ears, because the pressure is deciding how much the cooler will cool (temperature difference), not the final temperature. The final temperature depends on many other factors, like how much heat energy the walk-in-cooler collects through the walls, how often the door is opened, and which is the sorrounding temperature outside of the walk-in-cooler (Which temperature it has to "work against"), as a refridgeant system moves a set amount of heat energy from one Place to Another. Using system pressure for temperature Control sounds like it gonna lead to a walk-in-cooler that is "warm" on the summer and "freezing" on the Winter, as the adjacent temperature around the walk-in-cooler will be a tad lower on the Winter, transferring less heat energy through the walls and during door openings, and a tad warmer on the summer, transferring more heat energy through the walls and during door openings. Or is a thermostat wired in series with that pressure switch doing a final temperature Control aswell?

[@robertarnold6672]

@@sebastiannielsen I work at a hospital & our morgue operates on a pressure switch as well as several reach in case type beverage coolers in the cafeteria. I'm sure the design engineers of the equipment considered all the criteria you listed above. I have never observed any real temperature differences on the equipment in summer or winter. The pressure control eliminates the need of a t-stat so you will not find one on a pressure control piece of equipment. The pressure of the refrigerant & the PT relationship between them will regulate or control the temperature & they work quite well. Thermostats with a gas or liquid charged sensing bulb will operate with the same principle as the pressure control. Heat is always trying to get to a space that is lower in temperature so regardless, the pressure control will react with the changes & operate in accordance to the setpoint of the control, not some other final temperature. If the setpoint is 34 - 39 degrees the pressure control will maintain that setpoint just fine unless the controller goes bad or something else happens to the system.

[@HVACRVIDEOS]

Thanks so much for watching I am going live this evening 2/18/19 at 5PM (Pacific time) to discuss recent uploads and answer questions from the week. Come on over and check it out kzbin.info/www/bejne/bWmum5abpLqqosU

[@hvacpa6555]

this is what we call diagnostic .great video

[@HVACRVIDEOS]

Thanks

[@ricardojavierramosmorua8872]

Another cool video...thanks

[@michaeldower5619]

Great video. Thank you.

[@toyinorodare4072]

Thank you for this video

[@luizdasilva211]

Thank you so much.

[@saltrue1555]

Thank you for your teaching God bless

[@HVACRVIDEOS]

Thanks for watching

[@HVACRVIDEOS]

I am going to go live on KZbin tonight 11/5/18 at 5:00PM pacific time to discuss my most recent uploads and answer questions. Come on over and check it out kzbin.info/www/bejne/gHnTcqiKr9-qbKc

[@hvacjohnnie]

Again. Very Nice job. You are one of the Coldest Guy on YT.

[@HVACRVIDEOS]

thanks!

[@joseluisgonzalezlopez9696]

Excelente vídeo

[@alfredode6142]

Thanks master!

[@craigmarshall40]

Great videos thank you

[@hvacae6904]

Good idea saves time and the hassle of vacuuming nice

[@mccutcheonservicesllc81]

Good job 👍 Great video

[@mattzurzola4664]

Another great video

[@vzk1259]

Awesome video!!!

[@unknownsf0]

Great video

[@JCM2LA]

Great stuff

[@HVACRVIDEOS]

Thanks bud

[@crossmen2000]

I use your videos as teaching tools for my HVAC mechanics (I am a warehouse maintenance manager). Keep them coming! On a side note, have you ever considered dabbling in industrial refrigeration, such as ammonia? The need for ammonia refrigeration is growing as a result of the Montreal Protocol, but the talent pool is quickly drying up.

[@HVACRVIDEOS]

Wow that cool that you use my videos, thanks! The talent pool has damn near dried up in my sector (restaurant refrigeration) too

[@jasonyeager9102]

I had something similar happen on a Marvair unit today...had and intermittent low pressure lockout scenario due to a failing LP switch. Took a minute to catch the unit doing it though

[@HVACRVIDEOS]

Good catch!

[@MikeyB931]

Great Video!!

[@MrJosebolivar]

Hi. Very nice the ways you’re explains the job . I am working on draft walking the draft beer do not get that cool the bartenders say at the outside door thermostat do not go below 40 always was at 38 . The compresor get so hot I have water hose run there and low the pressure to 55 Paige low succión line, and I have some bubbles in sight glass and yes temperature go down to 38 . But I don’t know what could be wrong? Thanks for you feedback

[@bharatbeerrama6455]

Thanks sir

[@IkramKhan-nq2rs]

Very good video

[@juliochavezunacosa4147]

always adjust the pressure control with the manifold gauges and nitrogen before be installed it

[@samsamy3772]

thanks

[@harjinder7435]

thanks sir

[@Takeithome345]

Nice job !!

[@HVACRVIDEOS]

Thanks

[@hvactechpr7872]

Ranco pressure control = POS... But double checking was point on!! I usually use Johnson control ones and there a little more accurate. I also noticed you had a service opening there but I ain't fond of Tecumseh but good point to show out!!

[@OcRefrig]

good vid.

[@goldfinch1384]

Nice job

[@HVACRVIDEOS]

Thanks bud

[@eliseovalle8121]

Thank u

[@HVACRVIDEOS]

I will be going live on KZbin this evening 10/14/19 @ 5:PM (pacific time) to discuss my most recent uploads and answer questions from the LiveChat, KZbin comments, Emails, and Facebook comments come check it out if you can. kzbin.info/www/bejne/qnOUYo2KiK2bnqc

[@Colt-wr6wx]

Thanks!

[@HVACRVIDEOS]

Thanks for watching

[@HVACRVIDEOS]

I will be going live on KZbin this evening 4/22/19 @5:PM (west coast time) to discuss my most recent uploads and answer questions from emails and the chat. Come on over and check it out if you can kzbin.info/www/bejne/kKuXaYZjg9Kfd7s

[@randomrefrigeration4564]

Love your videos they have helped me great deal in Refrigeration. I steeped into a service manager position about 8 months ago and I still watch your videos it’s more now to keep refreshed and to lead my techs in the right direction. We had a call on Masterbilt rack on a freezer cooler combo that I reluctantly accepted the call for. I knew that several companies had been out there working in this box over the last month so that’s what my reluctance was for. Anyway we took the call. It’s a Masterbilt 1.0 setup with Sporlan EEV’s. I know you have installed the Beacon controllers with the EEV’s. What kind of EEV are used with the Beacon? Do you have any videos on trouble shooting the EEV’s. I have got a lot from the Sporlan videos but there are only 2 on there site. Well only 2 that I found. Was hoping you had something real world in the field troubleshooting the transducer the sensors and the valve. A lot to ask for I know but it sure would be great to see someone like you showing how you go about it in a box at a customer site. I appreciate you and what you do to better our trade and whatever you have to offer in the line specs or info in general pertaining to Sporlan EEV’s Thanks

[@HVACRVIDEOS]

I dont have any videos on the eev's but I would encourage you to look into the sporlan SMA-12 tester it can be used to test any stepper motor style eev.

[@Manuelrrrrrran]

awesome

[@russellbillr97]

Great video as always- are you worried about the tiny amount of air that was trapped in the new low pressure cap tube when you installed it? I know the system was under positive pressure but since there is no way to bleed refrigerant through the low pressure cap tube I can only assume a tiny amount of air was left in the tube and then mixed or pulled into the system during its next pump down. Thanks for the great content--

[@HVACRVIDEOS]

You are correct and there is a tiny amount of air in there, it's not a great thing but not too concerning in my opinion.

[@russellbillr97]

@@HVACRVIDEOS thanks, I appreciate the response

[@robertmessinger5112]

I got a walk-in freezer compressor is running the fans on the evaporator are running it’s at 50° inside the cooler the low side feels warm high side feels warm I was wondering if you had any suggestions

[@julianfigueroa6359]

So you work on fyers and restaurant ovens? If so can you please make a video on them? I been watching all of your refrigeration videos and dude you are smart as hell. Imma about to start a job at Wendy's as a maintenance mechanic and I have to know how to fix coolers and ovens I hope you can give me some pointers, I'll even pay you for Paretron private sessions. I'll pay 100 sorry that's all I can afford.

[@cr76802]

On those low pressure switch a I've seen people spray them with WD-40 to adjust and keep them working.. they end up getting a nightmare down the road

[@woww1993]

Love your videos. I'm an electrician but fascinated with refrigeration, Hows come walk ins and such pump down to shut off and lets say for example a house a.c. why it dosent' need to pump down? Be interested to know.

[@Goldstacker1972-kp2bh]

I always give it the screwdriver whack test. Lol

[@nicholasgelato118]

Hi ! I wanted to ask, I have been doing Hvac for 14 years , I want to get into HvacR what is the best way to get trained? Schools out here want crazy money. Love your videos by the way.

[@andrewedis9907]

I prefer those dual pressure controls so I know what im looking at.

[@JohnDoe-vf8cw]

The small amount of air in the copper tube of the pressure controller getting in the system doesn't effect it?

[@eaheatingandcooling3368]

Hello I am kinda a new to low temp, I built mobile walk-in freezers and every time I am going to start them up the compressor stalls and stops. I have to do it several times until is starts working, then after it works it does not do it again. I’ve replaced starting components, compressor, wires has a 75ft long cord and it is a 8 gauge wires. What I started doing is putting thermostat up to 100 so liquid line can pump it down and still doing the same. When the system was new it did no happened. Voltage always no less than 203-208 on ea h leg. What can be the problem and thank you for your videos we are in El Paso tx.

[@harrydickson4575]

👍👍👍

[@anthonymeurer9981]

Do you do any new box installs?

[@seanmichael8202]

Pissed out - Common refer lingo 🤙

[@sincityhvacr]

great video what do u usually set the 22 system at cut in cut out

[@HVACRVIDEOS]

If it's a pump down circuit with a defrost clock i usually do co at 5 and cut in 25 ish

[@mdmedia9072]

How do we check low pressure in air dryer.