Rookie Refrigeration, it was humble of you to be trsnsparent enough in this video to show that you needed troubleshooting help with the loading/unloading issue. I appreciate your honesty and openess. As technicians, we all inow what it is to encounter a problem that stumps us, causing us to need help at times. None of us know it all. Good content in this video.
@@rookierefrigeration4357 Every service call is a learning experience. Even the things we already know, we gain a deeper understanding of them. I've learned that if I stay humble, stay a student of our trade, I'll always be in learning mode which makes for always becoming a better technician.
Good vid ! Hey Rook , The Reason the Condenser is a Distance away From Rack is Roof Load. Engineers Like to Spread the Roof Load , Vibration , Noise , Harmonics etc. It’s a Good idea. Helps stave off Cracked piping etc too. A LITTLE distance is a Good thing. Multiple compressors , feeding multiple Evaps , under hugely Varing ambient conditions and case load conditions is Sometimes Tricky especially if the system has Modified since design & installation / Cases added or removed / altered. Extremely Low Load conditions are allways tricky. I Remember back in the day ( 80’s ) no rack control system. Oil Return problems with tandems under low load conditions. It was always a pain in the derrière. ( Ftngot ) if possible , Try to only install One Evap to One compressor systems. Multiple evaps to multiple compressors is ALLWAYS TROUBLE & expensive. Like # 250
Very interesting. My first thought was maybe low refrigerant but those racks are way different than my understanding. As far as cold OKC is worse right now. Ice, accidents, COLD and getting colder and now they are calling for 6-12 inches of SNOW... I wish I was getting on a plane to Jamaica today or headed to Galveston to get on a ship for warm waters. But it's amazing how temperature extreme's will cause issue to creep up. I bet that this is probably the coldest that rack has ever been since it was installed. Good that you have someone to give you a hand on that though.
Hey Rook , Good vid. Watch your short cycling of Compressors when making adjustments. Sometimes pressures are Raised & lowered on each end to Give the compressor more off time & more on time. Tightening the Graph CAN be a Bad thing Most times.
Who knows , unloader may have been changed out with a different type. Control board changeout. Lots of scenarios. Green tech. Testing unloaders. Forgot to switch back.
You guys rock man. Great video. Do you both work together? Edit: I now know who Brett is. He's a legend. Advanced refrigeration podcast. Thanks for sharing this video!
Oil faults through oil pressure switches generally dont have anything to do with oil, its to do with it timing out when it doesnt see pressure after a set amount of time. Usually 30 45 60 or 75 seconds. You usually cannot adjust the time delay, you said your discharge was cold, the fact there was only 2 compressors running on the rack and that there was no load means discharge probably dropped out before the timer on the oil switch was satisfied as your discharge drops your oil pressure drops also
Do you guys run the coolers off 50 50 between the air on and air off? Or 100% on the air on? Thats how we run our coolers and generally dont have any load issues anywhere, we run danfoss controllers everywhere here so not sure if you can set it up the same in the usa
Reason why he had oil failures is because the rack was barely running any load because it kept shutting off the oil separator became cold so basically if the saturated was getting up to 85ﾟ in because of 32ﾟ outside the oil line actually condensed into a liquid than delivering liquid to the compressors rather than oil
Nice vid but it did clearly show on the RS a +18* design suction saturated setpoint. The reason this is lower that the lowest design evap temp medium case (+20*), is to account for the pressure drop across the suction line piping and the EPR.
Not really. We've got several systems running it. It does a very good job for MT applications. I personally like its low pressures because it puts less stress on the system. We rarely have issues with it.
So to sum it up... The unloaded were set up to be normally open upon arrival. The E2 would turn them “on” which closed the unloader and unloaded the compressor. When the E2 turns “on” the unloader it should actually open the circuit and load the compressor. That’s why they had to be changed to normally closed. Kinda weird. I’d think that turning on the unloaders should unload the system.
Did you move the suction back down once the eepr’s opened up and then relearn? Also, the unloaders were wired normally open, but were set to normally closed on the inversion dip switches, did I understand that correctly?
Would the relay board wiring vs dipswitch setting been wrong from the installation till you fixed it? Or did someone change it and forgot / not discover that that wasn't supposed to be like that?
Condenser is sized for a full load at 120ﾟ ambient. So technically at 60ﾟ ambient half the condenser would be enough to hold the whole load of the rack. So what hes referring to full time condenser , he's talking about the side that never shuts off
Brett's parents, spelled his name properly, with TWO-TEES. TWOTEE is correct! But, guys with only one T? Well, unfortunately, those guys, with only one T, (looking down now),,,,,, too bad for those guys! Yootz can calls him TWOTEE, but, dun'ts be acallinz him FRUITY! It's great, to be, a BRETT, with TWO TEES! TWOTEE!!!
The Union dues are all Tax deductions. And you get the best medical Benefits. I just recently retired after 31 years in the Union . My pension is 10,000 a month and now I can travel any were and move to a cheeper state and live like a king. But we’ll miss our grandson. 50 hours will take a toll on your body and family time and you won’t get it back. Retirement is not a Graceful exit. 1 day your body will tell you that. And your employers will be already thinking to replace you. I was told that and never believed it till it happened to me. On a Friday morning I work up and my body and mind said that’s enough. I went to the hospital and the doctors said you’re stressed out. I turned in my truck the following Monday. So I hope all these hours is beneficial Financially at the end.
Rookie Refrigeration, it was humble of you to be trsnsparent enough in this video to show that you needed troubleshooting help with the loading/unloading issue. I appreciate your honesty and openess. As technicians, we all inow what it is to encounter a problem that stumps us, causing us to need help at times. None of us know it all. Good content in this video.
Yes sir. Thank you. I try to be honest and real. Some of the new guys may think I know it all which I don’t. Lol
@@rookierefrigeration4357 Every service call is a learning experience. Even the things we already know, we gain a deeper understanding of them. I've learned that if I stay humble, stay a student of our trade, I'll always be in learning mode which makes for always becoming a better technician.
Who moved the dip switches?? If it was working before?
Thanks again for your time making educational videos never is too late to learn
Thank you for sharing. That’s a good find. Ive Been working with racks off and on for about 4 1/2 years. Great video!
Thanks bro.
I’m really learning a lot about the Emerson RACK system thank you very much for showing me this I appreciate it brother
Thanks
Good vid ! Hey Rook ,
The Reason the Condenser is a Distance away From Rack is Roof Load. Engineers Like to Spread the Roof Load , Vibration , Noise , Harmonics etc. It’s a Good idea. Helps stave off Cracked piping etc too. A LITTLE distance is a Good thing.
Multiple compressors , feeding multiple Evaps , under hugely Varing ambient conditions and case load conditions is Sometimes Tricky especially if the system has Modified since design & installation / Cases added or removed / altered. Extremely Low Load conditions are allways tricky. I Remember back in the day ( 80’s ) no rack control system. Oil Return problems with tandems under low load conditions. It was always a pain in the derrière. ( Ftngot ) if possible , Try to only install One Evap to One compressor systems. Multiple evaps to multiple compressors is ALLWAYS TROUBLE & expensive. Like # 250
That type of support is priceless 👌. Keep the videos coming 📹 great info for us new guys.
That was a awesome video!!! Sounds like that man has that E2 book and some memorized!
Very interesting. My first thought was maybe low refrigerant but those racks are way different than my understanding. As far as cold OKC is worse right now. Ice, accidents, COLD and getting colder and now they are calling for 6-12 inches of SNOW... I wish I was getting on a plane to Jamaica today or headed to Galveston to get on a ship for warm waters.
But it's amazing how temperature extreme's will cause issue to creep up. I bet that this is probably the coldest that rack has ever been since it was installed. Good that you have someone to give you a hand on that though.
Now that's a guy to have on speed dial
Exactly
Hey Rook ,
Good vid. Watch your short cycling of Compressors when making adjustments. Sometimes pressures are Raised & lowered on each end to Give the compressor more off time & more on time. Tightening the Graph CAN be a Bad thing Most times.
Man I just learned a ton from you & your co-worker! Thanks for sharing.
Thanks bro
Great video very interesting. It’s always good to learn. I wonder who would have changed the dip switch settings.
Who changed the dip switch setting in the first place I want answers ? Good job Bret.
Who knows , unloader may have been changed out with a different type. Control board changeout. Lots of scenarios. Green tech. Testing unloaders. Forgot to switch back.
Mann this was great info!!! Thanks for the video!! 💪🏼💯
I appreciate you watching
This is some NASA type of shit lol. Very good vid bro.
seem like a guru bret. good video rookie! definately taught me something
thanks hoss
Nice work guys. Thanks for the video.
Cool video. A lot of info to learn and study.
You guys rock man. Great video. Do you both work together?
Edit: I now know who Brett is. He's a legend. Advanced refrigeration podcast. Thanks for sharing this video!
Oil faults through oil pressure switches generally dont have anything to do with oil, its to do with it timing out when it doesnt see pressure after a set amount of time. Usually 30 45 60 or 75 seconds. You usually cannot adjust the time delay, you said your discharge was cold, the fact there was only 2 compressors running on the rack and that there was no load means discharge probably dropped out before the timer on the oil switch was satisfied as your discharge drops your oil pressure drops also
Do you guys run the coolers off 50 50 between the air on and air off? Or 100% on the air on? Thats how we run our coolers and generally dont have any load issues anywhere, we run danfoss controllers everywhere here so not sure if you can set it up the same in the usa
Reason why he had oil failures is because the rack was barely running any load because it kept shutting off the oil separator became cold so basically if the saturated was getting up to 85ﾟ in because of 32ﾟ outside the oil line actually condensed into a liquid than delivering liquid to the compressors rather than oil
@@brettwetzel7247 thats mental, ive never seen that happening, I'll have to look out for that one. Cheers brett
Nice vid but it did clearly show on the RS a +18* design suction saturated setpoint. The reason this is lower that the lowest design evap temp medium case (+20*), is to account for the pressure drop across the suction line piping and the EPR.
Agreed but because the lowest SST were door cases it still maintains with a higher sst
134 a is a horrible refrigerant for grocery stores
Not really. We've got several systems running it. It does a very good job for MT applications. I personally like its low pressures because it puts less stress on the system. We rarely have issues with it.
If you consider the low pressures it operates at seems to be ideal for using in the south.
Thank you, It's very rare that you find someone that will share the knowledge with you. Really appreciated
Very interesting service call u are the best good luck
Thanks guys, I appreciate you two badasses.
Great find
Wow, way over my head again.
So to sum it up...
The unloaded were set up to be normally open upon arrival. The E2 would turn them “on” which closed the unloader and unloaded the compressor. When the E2 turns “on” the unloader it should actually open the circuit and load the compressor. That’s why they had to be changed to normally closed.
Kinda weird. I’d think that turning on the unloaders should unload the system.
I guess it makes sense if you think of every “on” command as an additional stage of cooling.
12:17 Set off the alarm to the building? Haha sounds like a fun night.
For how long these settings were in the programmer?
The stores recently went through changes. Didn't really show any symptoms until the ambient temp dropped.
Gotta love a level 7 buddy like that great guy
Exactly. Lol
thank you sir
You all have an opening for a strong team player ?
@@timr4362 you wouldn't move 🤣🤣
@@rookierefrigeration4357 already in that process but staying with the company for sure.
Did you move the suction back down once the eepr’s opened up and then relearn?
Also, the unloaders were wired normally open, but were set to normally closed on the inversion dip switches, did I understand that correctly?
No because the dairy cases Have doors on them so they were still maintaining 20% on the EPR even with having it elevated higher than what it was
@@brettwetzel7247 the unloaded were wires N.O. But were Set N.C. On the inverter?
Phew ... there's a lot to learn in this business.
Great video 👍
Would the relay board wiring vs dipswitch setting been wrong from the installation till you fixed it? Or did someone change it and forgot / not discover that that wasn't supposed to be like that?
No way to really tell. It can be confusing so if someone changed it we can't tell. Lucky Brett noticed it immediately
Good job rookie you the man
What does the device absent alarm mean ? Had one today at work and had to reset the controller it worked for all of them but one.
Probably no power. Or bad connection. Etc. those are good call. Challenging at times
Menu 7-7-1 will bring up network and can see which are online/offline
Hi! Do you know where I can buy used hvac tools online?
I do not bro. Sorry
Way over my head ,but nice stuff rook .
Lean slowly bro.
System too large or can you set certain parameters to have one compressor running at such low load?
I had to watch that back to understand what was going on.
Can you please explain what do you mean by year round condenser?
Condenser is sized for a full load at 120ﾟ ambient.
So technically at 60ﾟ ambient half the condenser would be enough to hold the whole load of the rack.
So what hes referring to full time condenser , he's talking about the side that never shuts off
Thank you for the reply, very informative great content guys
Can I get this Brett guy in my pocket? I could just pull him out sometimes here in California
Lol. Hes worth a left nut and a million a year.
great video bro
So how did the dip switch settings get changed ???
Either by mistake or incompetence.
Well done
Good job.
So how does one learn to the level brent is at, thats a smart mf.
Nice video
Love it man
Surprisedto see Bitzer in this part of the world
Back to racks?
Brett's parents, spelled his name properly, with TWO-TEES. TWOTEE is correct! But, guys with only one T? Well, unfortunately, those guys, with only one T, (looking down now),,,,,, too bad for those guys! Yootz can calls him TWOTEE, but, dun'ts be acallinz him FRUITY! It's great, to be, a BRETT, with TWO TEES! TWOTEE!!!
Did Brett hit that lvl 8 yet.
🤷♂️
@Rookie Refrigeration Good video ... nothing like seeing that Enhanced Suction Algorithm learn again and cycle like crazy for 24 hours...
@@refrigerationconfidential4376 no level 8 ,I'm good with just training
@@brettwetzel7247 Heard you had skills all the way here in CA... keep up the great work man..
Amazing. You guy’s need to move to California. They pay about 100 an hour plus benefits in the Union.
You lost me at Cali.....
@@rookierefrigeration4357 I know we have crazy shit here bro but we also got crazy money.
The Union dues are all Tax deductions. And you get the best medical Benefits.
I just recently retired after 31 years in the Union . My pension is 10,000 a month and now I can travel any were and move to a cheeper state and live like a king.
But we’ll miss our grandson. 50 hours will take a toll on your body and family time and you won’t get it back.
Retirement is not a Graceful exit. 1 day your body will tell you that. And your employers will be already thinking to replace you. I was told that and never believed it till it happened to me. On a Friday morning I work up and my body and mind said that’s enough. I went to the hospital and the doctors said you’re stressed out. I turned in my truck the following Monday. So I hope all these hours is beneficial Financially at the end.
Temprite maybe
Low on refrigerant
first
Lol. Get to work
@@rookierefrigeration4357 no work bro :)) too slow
Damn. Join refer
@@rookierefrigeration4357 im doing restaurants , need to switch for now
You don’t make sense. You talk like you know and schooling rookies but you need to ba a senior to teach