Working somewhat blind, you did great as your process of elimination (fundamentals) took over as you worked it out through order of operation, great job dude.
You got it. With that discharge pressurization valve if it was close the liquid will just sit it the receiver. Another thing to check is that you don't have overlap with defrost cycles, especially long run cases. I find depending on the length of run and pipe sizes you might have to set your differential higher up to 35#. You'll know if you keep having a set of cases not reaching termination temp or you are defrosting a set and drain is not plugged up. Usually every couple of months depending on store humidity. A quick way to check flow after putting a system on defrost is to grab the liquid line check valve that goes around the LL solenoid for that system. it should start to feel cold fairly quickly then you'll know the coil is starting to defrost. If you don't then you know where to start looking, discharge bypass(pressurization) to the receiver, liquid line modulating valve, etc. is your termination air temp or dump line temp? we set termination at 55f for the minimum case. sometimes lower if there is a build-up of condensation on case canopy or frosting on product top shelf.
C Thompson thanks for the advice. Yeah,we had a similar issue in the summer where another tech couldn’t get the cases to defrost well, so he increased defrost times and raised termination temps. Man this rack had the oldr energized for like 5 hours straight, receiver at 100% the whole time, lol. I had to undo his “fix”. Lol. And those temps for termination are on the piping.
I live 3 degree north of the equator and there’s no such thing as cold weather here and the system built here only caters for what you call summer. Therefore I have no knowledge on this and it is the first time I see a rack which runs like this, other than on single-line diagram. Bravo anyway.
Rookie Refrigeration lol i came from light refrigeration. But yes getting thrown to racks at 3am. Got to figure it out to get it back running and get help on the morning. So all this CPC and E2 is also new.
Your videos look like we work at the same places. Just different states. We do a BUNCH of 7 11s and cardenas. I know I've seen some 711 shit in your vids. Bring on the Vendo vids! I'm brand new. Learning more from your videos than I did from school.
@@jimmyp5487 I'm in nor cal. Do you guys have the.no follow-ups rule also? We can't do follow ups unless the parts aren't available. Owner doesn't wanna lose them vixxo points. Just spent 9 hours de-icing and troubleshooting a beverage Walk in..on double time...
@@BigHuff-sq9hb ... yup same shit over here... gotta keep those scores up. Thinking maybe Vixxo is starting to loose points with 7-11. You guys have different contractors doing the hvac PMs out there since covid happened?? We do over here. 7-11 bypassed Vixxo and hired separate contractors for just the hvac PMs. That hurt us a bit but pretty busy now.
Rookie Refrigeration I hear ya on bills!! Ha. Those early morning g with no one to answer my calls and no tech assist would drive me crazy sometimes. But they did pay dearly for them. Ha
Another guy new to racks here, but I figure I’d give my two cents worth. You might’ve been going down a rabbit hole with the correlation between defrosts and liquid level. You saw the rack was in split condenser mode. when that happens in the fall, and before the temp gets cold enough to start flooding the condenser(after fan cycling wont cut it). Thats going to be when your liquid level it as its highest. Think about how much refrigerant gets pumped out of the summer condenser. Was this rack retrofitted recently and possibly just has a bit too much gas?
Trever Kirk we had some similar issues in the summer on this rack. But it was definitely not overcharged in full condenser. Now that it splits it may be. Maybe by 10-15%. Were going back out this week and dialing it in.
Hey man Im new to racks too. They really are no joke but the complexity keeps it interesting. Im up in Maine, so it gets cold af up here. Thanks for the videos. Ps, why arent your custies using the danfoss 255s or 880 controllers? Way easier to navigate
George Gay this chain uses only Emerson E2. We have another one that only uses novar. We don’t have a single customer with Danfoss controllers. Or at least that I’ve beento. Lol
@@rookierefrigeration4357 Yeah I work as a Hannaford in-house tech and we basically over complicate everything to maintain energy efficiency. We need more people getting into the market side, all the veterans at my company are retiring in the next 2 years. Keep up the good work, i am thinking of making a channel myself
thinking about A9 in discharge .had problems with hussmnn rack.alarm issues.defrost issues.when a system went into a defrost cycle,the entire rack was pumping down.defective main liquid solenoid.the valve would jam shut.replaced valve ,defrost straightened up,got diffrential during defrosts.
Quick way to get it to work so we can go home. Have to keep floating that head though so we gotta verify you have at least 70*F converted out of that A9 valve (because of gas defrost)
Stephen Ramsey it worked out really well after this adjustment but the senior rack tech went out after me. I don’t know what they did to it. But no more calls
Rookie Refrigeration Happydays mate. I have only started working on small packs myself, so your videos very helpful on them. I’m from Belfast Northern Ireland
I think Rookie Ref is the best name first some videos are when you were a rookie now that your not you get to show the rookies what to do and how to not be rookies lmao
It's a rotation tester for electic motors..works great on solenoids to check activity but voltage could still be present with a bad coil. Amazon has them.
Working somewhat blind, you did great as your process of elimination (fundamentals) took over as you worked it out through order of operation, great job dude.
You got it. With that discharge pressurization valve if it was close the liquid will just sit it the receiver.
Another thing to check is that you don't have overlap with defrost cycles, especially long run cases.
I find depending on the length of run and pipe sizes you might have to set your differential higher up to 35#.
You'll know if you keep having a set of cases not reaching termination temp or you are defrosting a set and drain is not plugged up. Usually every couple of months depending on store humidity.
A quick way to check flow after putting a system on defrost is to grab the liquid line check valve that goes around the LL solenoid for that system. it should start to feel cold fairly quickly then you'll know the coil is starting to defrost. If you don't then you know where to start looking, discharge bypass(pressurization) to the receiver, liquid line modulating valve, etc.
is your termination air temp or dump line temp? we set termination at 55f for the minimum case. sometimes lower if there is a build-up of condensation on case canopy or frosting on product top shelf.
C Thompson thanks for the advice. Yeah,we had a similar issue in the summer where another tech couldn’t get the cases to defrost well, so he increased defrost times and raised termination temps. Man this rack had the oldr energized for like 5 hours straight, receiver at 100% the whole time, lol. I had to undo his “fix”. Lol.
And those temps for termination are on the piping.
I super appreciate the videos man. Keep em coming
Kenny Baker HVAC/R thanks bro. I’m still new to racks so I will do my best. Thanks for watching
who turn that valve off! Nice video.
Daniel Alvarado probably someone in the summer. Troubleshooting or something and forgot to turn it back on🤷🏽♂️. Lol.
Definitely a learning experience thanks for posting..........
Thanks for watching. And it definitely is something new
I really appreciate the videos thanks for all the information. You’re doing a great work man
Thanks bro. Thanks for watching.
Nice appreciate ur videos and sharing ur knowledge of racks
refer life thanks A lot bud.
Nice vid love your explanation methods keep them coming thanks.
Thank you for watching. 🤘🏼
I live 3 degree north of the equator and there’s no such thing as cold weather here and the system built here only caters for what you call summer. Therefore I have no knowledge on this and it is the first time I see a rack which runs like this, other than on single-line diagram. Bravo anyway.
YL Lai thank you
Thanks, great video you are doing a awesome job.
Nice video pretty cool stuff. That would be fun troubleshooting those racks.
It’s a headache, especially because I’m new to them lol 😂
I feel you pain. Rookie on the Hou office. Aint no joke with the racks.
Yup. Do you work on racks too. Or assist in them.
Rookie Refrigeration lol i came from light refrigeration. But yes getting thrown to racks at 3am. Got to figure it out to get it back running and get help on the morning. So all this CPC and E2 is also new.
Having a harder time with MT board from HEB. Etc wheb they wan to act erratic or loose programming
Your videos look like we work at the same places. Just different states. We do a BUNCH of 7 11s and cardenas. I know I've seen some 711 shit in your vids. Bring on the Vendo vids! I'm brand new. Learning more from your videos than I did from school.
I’m in Virginia and do all the 7-11’s
What state you have em in?? Gotta love Vixxo 🤘🤘🇺🇸🇺🇸
@@jimmyp5487 I'm in nor cal. Do you guys have the.no follow-ups rule also? We can't do follow ups unless the parts aren't available. Owner doesn't wanna lose them vixxo points. Just spent 9 hours de-icing and troubleshooting a beverage Walk in..on double time...
@@BigHuff-sq9hb ... yup same shit over here... gotta keep those scores up. Thinking maybe Vixxo is starting to loose points with 7-11. You guys have different contractors doing the hvac PMs out there since covid happened??
We do over here. 7-11 bypassed Vixxo and hired separate contractors for just the hvac PMs. That hurt us a bit but pretty busy now.
@@jimmyp5487 It doesn't seem like they are even doing pms at all up here.
Nome,Maick ,Brasil ,São Paulo,curto muito seus vídeos recomendo 👍 fera da Refrigeração.
Your no rookie lol.great vids
Nice job chief
Thank you sir.
Looks like a Walmart rack? Reminds my of some old nightmares at 3am OT calls there!!!
This is a Target. Yeah I absolutely hate the oncall at 3am. But it gets the bills paid 🤷🏽♂️
Rookie Refrigeration I hear ya on bills!! Ha. Those early morning g with no one to answer my calls and no tech assist would drive me crazy sometimes. But they did pay dearly for them. Ha
Another guy new to racks here, but I figure I’d give my two cents worth.
You might’ve been going down a rabbit hole with the correlation between defrosts and liquid level.
You saw the rack was in split condenser mode. when that happens in the fall, and before the temp gets cold enough to start flooding the condenser(after fan cycling wont cut it). Thats going to be when your liquid level it as its highest. Think about how much refrigerant gets pumped out of the summer condenser.
Was this rack retrofitted recently and possibly just has a bit too much gas?
Trever Kirk we had some similar issues in the summer on this rack. But it was definitely not overcharged in full condenser. Now that it splits it may be. Maybe by 10-15%. Were going back out this week and dialing it in.
Bro your channel is the shit good content and always humble 🔥🔥🔥 keep it up 👍👍💪
proxybert thank you bro. I appreciate that
Hey man Im new to racks too. They really are no joke but the complexity keeps it interesting.
Im up in Maine, so it gets cold af up here.
Thanks for the videos.
Ps, why arent your custies using the danfoss 255s or 880 controllers? Way easier to navigate
George Gay this chain uses only Emerson E2. We have another one that only uses novar. We don’t have a single customer with Danfoss controllers. Or at least that I’ve beento. Lol
@@rookierefrigeration4357 Yeah I work as a Hannaford in-house tech and we basically over complicate everything to maintain energy efficiency.
We need more people getting into the market side, all the veterans at my company are retiring in the next 2 years. Keep up the good work, i am thinking of making a channel myself
Please do. There’s very few of us. Lol
thinking about A9 in discharge .had problems with hussmnn rack.alarm issues.defrost issues.when a system went into a defrost cycle,the entire rack was pumping down.defective main liquid solenoid.the valve would jam shut.replaced valve ,defrost straightened up,got diffrential during defrosts.
that s the valve i was thinking about.
Quick way to get it to work so we can go home. Have to keep floating that head though so we gotta verify you have at least 70*F converted out of that A9 valve (because of gas defrost)
Yeah, you may be talking a bit above my level 🤣🤣. I still have alot to learn about these systems. Thank you, I will read up on this. I appreciate it
Nice videos, let me ask you something what when I have cases in defrost liquid level is low.
Ali Mohame too many things. You could be stacking refrigerant in the condenser if your DDR valve is set too high.
Man that's a little intimidated but I do want to get into heavy commercial refrigeration...I'm done with little reach in coolers and walk ins..
Only way to go bro
Was the rack ok when you went back rookie?
Stephen Ramsey it worked out really well after this adjustment but the senior rack tech went out after me. I don’t know what they did to it. But no more calls
Rookie Refrigeration Happydays mate. I have only started working on small packs myself, so your videos very helpful on them. I’m from Belfast Northern Ireland
Nice video bro . Where did you get the troubleshooting slide chart from on how to check the oldr valve ?
The pics I put into this video are from the stores refrigeration engineer and how the store wants their settings.
Rookie Refrigeration cool keep them videos coming
Good vid
Thank you.
I'd say possibly receiver undersized ( had a rack system that was) or overcharged secondary thought non against the condensables
I would like to learn rack does your company hiring?
angle valve for differential valve on suction header.?
I'm not sure which one you're talking about. Can you let me know when on the video it is. Like min and seconds.
I think Rookie Ref is the best name first some videos are when you were a rookie now that your not you get to show the rookies what to do and how to not be rookies lmao
Lol. Very true. Thanks for watching bro.
Where are you guys located?
Miguel Martinez DFW Texas
I was just asking because I’m in California is there a lot of work outhere for us refer guys?
Miguel Martinez were way too busy man. Move on over to Dallas
What’s that coil tester thing you had?
To see if it’s energized
Not exactly sure the name. We have a bunch of them. It just picks up a magnetic field.
It's a rotation tester for electic motors..works great on solenoids to check activity but voltage could still be present with a bad coil. Amazon has them.
That’s the beat way to learn thrown to the wolves. Either you get eaten and sent to change filters or you become the alpha wolf 🐺..
Sam Pantiliano agreed bro
Oh shit your right by my house at the 1 min mark your fort worth?
Yeah. North side.
Oh thats whats up
Lol 😂
Did you like the beginning 🤣🤣
Suppose to say non condensables