In this video, I will troubleshoot a walk in freezer that is taking way too long to get to temp and will break down pressures and saturation temperatures.
These are some of the best videos you can find. Very efficient, and nobody really covers pressures and what they should be like you do. I’ve learned a lot and continue to watch your videos. Thank you!
Your channel is awesome, been doing commercial kitchen appliances for 13 years and would have been awesome to have a channel like yours with real techs out on the field teaching and sharing their findings specially rational combi’s , keep it up brotha 👍💪💯
I'm surprised you use 10-15TD and 15CS on a walk-in freezer. I'm using 5-10TD/20CS and it better match to your gauge. But I'm glad you calculated using your number to show different variation. I've been reading many books and watch your videos in the last few months. I now understand everything you taught on your videos, supper cool!!! I wished you could do SH. You should've set up donation box I would pay since you made me lots of money too.
Hot side is tough because there is soooo much equipment. But it all really falls down to schematics and sequence of operations. If you can master the two of them you will be very successful.
Can you show next time how you charge the commercial fridge or freezer? Where you connect the hoses on low side and high side and how you charge the freon
Great use of emphasizing Dick Wirz and use of saturation temps regardless of refrigerants or pressures. Had the pleasure of meeting him at Bryan Orr's first symposium in 2020. Your use and explanation of the stress test is not something I've seen much of and applaud. Kudos! Davejohnsonnola
I've found great value in your videos. if it's not too much to ask I know your time is valuable but I have a question. Do you always use 30deg for the condenser? and doing the math for the evap you said depends how the TXV is set up. Can you elaborate? do you mean what the superheat is set to? THANKS !
Newer equipment is using a 15TD Condensor. Generally for walk in freezers we want 6-10F SH, but we can use 10F as a ball park for troubleshooting. If the installer set the SH to 6F the td would be 6F
@@REFRIGERATIONKITCHENEQTECH From what I read the manufacturers are now using multiple CS based on compressor hp. It's now hard to know exact CS w/o oem spec sheet. I was hoping you did SH or SC at condenser. It would've been a perfect top notch video.
Ok watched video noticed that you used saturation temp for suction pressure spec now at -10F box temp wouldn't your coil be more at-20F at 10 degree T.D. and at 10F superheat wouldn't that put your final suction pressure on a full system clear glass more at 9to 10 psig at -10F setpoint looking for feed back thank you
I’m looking for a 0F to -4F box temp, nothing much colder than that. So let’s say we are aiming for 0F box temp. At that temperature, your superheat will be closer to 4-6F. This would give me a saturation of approximately-4F. At -4F saturation, my pressure would be 28PSI. At 10F to 15F box temp, that is when you will get your 6F to 10F superheat.
So if the pressure are low enough they will freeze the coil? If the leak continues the coil would defrost overtime? It seems there are certain conditions that happen at certain pressures.
Yes, low pressure = low saturation temperature, causing the coil to freeze up. If the coil continues to leak, the ice on the coil would get worse and start to cover more of the coil.
10F TD evaporator for walk ins. This is just a general calculation to get us in the ball park so we can troubleshoot. The real calculation will be superheat.
Do you always use ambient air plus 15 or only on a freezer? Do you do ambient air plus 30 on like air conditioning sometimes or like if it was a regular walk-in cooler?
A lot of the newer units are using ambient temp plus 15F in order to calculate your head pressure. The older units use a plus 30F so sometimes it’s hard to know if it’s a plus 15 or plus 30, so it is very important to do your checks (fans, sight glass, suction saturation and SH etc)
These are some of the best videos you can find. Very efficient, and nobody really covers pressures and what they should be like you do. I’ve learned a lot and continue to watch your videos. Thank you!
Your channel is awesome, been doing commercial kitchen appliances for 13 years and would have been awesome to have a channel like yours with real techs out on the field teaching and sharing their findings specially rational combi’s , keep it up brotha 👍💪💯
Thanks!
I'm surprised you use 10-15TD and 15CS on a walk-in freezer. I'm using 5-10TD/20CS and it better match to your gauge. But I'm glad you calculated using your number to show different variation. I've been reading many books and watch your videos in the last few months. I now understand everything you taught on your videos, supper cool!!! I wished you could do SH. You should've set up donation box I would pay since you made me lots of money too.
I’m gonna to be learning from you videos on a whole new level because soon I’ll be working for a company that includes Hot side work 🙏🏼
Hot side is tough because there is soooo much equipment. But it all really falls down to schematics and sequence of operations. If you can master the two of them you will be very successful.
You do explain very well my friend , congratulations on your work , amazing 🙌💯
👍
Can you show next time how you charge the commercial fridge or freezer? Where you connect the hoses on low side and high side and how you charge the freon
Another excellent video. Great explanation and easy to follow. 👍🏼
👍👊
You are the best my friend,I love your videos,very good explanation,
Great use of emphasizing Dick Wirz and use of saturation temps regardless of refrigerants or pressures.
Had the pleasure of meeting him at Bryan Orr's first symposium in 2020.
Your use and explanation of the stress test is not something I've seen much of and applaud. Kudos!
Davejohnsonnola
appreciate the video, i have a question on why you add 15 and not 30 for ambient
Great video... nice leak find 👍🏽
Thank for spent time to record and explain all detail I learn a lot form all your video
Thanks!
I'm really enjoying your channel. Thanks
How do you when to use the 30 above ambient at condenser or 15 whether it’s a reach in or walk in
Thanks
Where are you getting the 10/15F is that your superheat target number???
I've found great value in your videos. if it's not too much to ask I know your time is valuable but I have a question. Do you always use 30deg for the condenser? and doing the math for the evap you said depends how the TXV is set up. Can you elaborate? do you mean what the superheat is set to? THANKS !
nevermind looks like you have answered that question in Nausium thanks again
Newer equipment is using a 15TD Condensor. Generally for walk in freezers we want 6-10F SH, but we can use 10F as a ball park for troubleshooting. If the installer set the SH to 6F the td would be 6F
Phenomenal video thank you for sharing
I been looking for a video with this info . Thanks
Send me a link on the torque tool
great professional work
Excellent job 👍👍
My grandma’s 25 yr old fridge is still running well that only needs a door seal and my 4 yrs whirlpool is @ a recycle yard. Mostly junks out there.
🤣
Great work. Any specific book you'd recommend for learning about commercial refrigeration? Thank you.
I bought a book over 10 years ago called refrigeration for A/c techs by Dick Wirz and it is still in my glove box to this day.
Perfect because I ordered one 2 days ago but wanted to see what you would recommend. Guess I made the right pick. Thank you.
Love the Way u operate. Question on CS, I thought condenser splits wer around 25 for freezers n 30 for coolers. U had 15 ? Thanks again for sharing!
The older condensing units used a 30F condenser split. A lot of the newer units including the reach in units are now using a 15F split.
@@REFRIGERATIONKITCHENEQTECH thanks for the information. Great video n and thanks for sharing 👍
@@REFRIGERATIONKITCHENEQTECH From what I read the manufacturers are now using multiple CS based on compressor hp. It's now hard to know exact CS w/o oem spec sheet. I was hoping you did SH or SC at condenser. It would've been a perfect top notch video.
Ok watched video noticed that you used saturation temp for suction pressure spec now at -10F box temp wouldn't your coil be more at-20F at 10 degree T.D. and at 10F superheat wouldn't that put your final suction pressure on a full system clear glass more at 9to 10 psig at -10F setpoint looking for feed back thank you
I’m looking for a 0F to -4F box temp, nothing much colder than that. So let’s say we are aiming for 0F box temp. At that temperature, your superheat will be closer to 4-6F. This would give me a saturation of approximately-4F. At -4F saturation, my pressure would be 28PSI. At 10F to 15F box temp, that is when you will get your 6F to 10F superheat.
@@REFRIGERATIONKITCHENEQTECH tkank you
So informative video , Can you send me formula how to find out correct charge in system
Use the sight glass, if no sight glass, head pressure would be used
So if the pressure are low enough they will freeze the coil? If the leak continues the coil would defrost overtime? It seems there are certain conditions that happen at certain pressures.
Yes, low pressure = low saturation temperature, causing the coil to freeze up. If the coil continues to leak, the ice on the coil would get worse and start to cover more of the coil.
You’re doing the job in good, but with using formula it’s better. Thanks
You are welcome!
Did you use a delta-t of 10 to 15 degrees across the evaporator coil to subtract from the one degree temperature? Thank you Tim 863. 255. 9001
10F TD evaporator for walk ins. This is just a general calculation to get us in the ball park so we can troubleshoot. The real calculation will be superheat.
Do you always use ambient air plus 15 or only on a freezer? Do you do ambient air plus 30 on like air conditioning sometimes or like if it was a regular walk-in cooler?
A lot of the newer units are using ambient temp plus 15F in order to calculate your head pressure. The older units use a plus 30F so sometimes it’s hard to know if it’s a plus 15 or plus 30, so it is very important to do your checks (fans, sight glass, suction saturation and SH etc)
Where do you get that torch wrench?
Sorry, which wrench?
sorry valve core torque tool
thank you for all your videos you are my mentor
Ah gotcha, I just picked that up from united refrigeration, but any supply house should have it
If you drill a hole in a cap you can soap the cap and the leak will blow through and you won't risk soap getting in the system
That’s a good tip
Drill a hole in a service cap to use for bubble testing so you don't have to get soap in there.
👍 great suggestion
If it hadn't leaked in two years,it ain't the installers fault.
Cork tape is the devil. The installer needs to be beat and shown how to use arms flex. And wth is that drain situation you got there?..
Lol ya I hate that cork tape. The drain is just a sharkbite water heater hose. They are great for blowing out the drains during a maintenance.
Animal shelter ?lol
The good ol skunk freezer