You could add a n electric water controlled valve fed from rack logic to determine when to use sprinklers to save the customer a lot of money on water...or even timer controls. Make yourself a little unit you can wire into the system and rent it or just increase the value of your services. It could be head pressure driven. Worried about water in controls, then make the valve unit built into the rack or bluetooth controlled from head pressure. There is a solution to avoid excessive water bills.
Min 16:50 That "sprinkler" is one of those things you put on your lawn, right? LOL -- nothing like a familiar sight of one of those in the middle of an HVAC video full of nuances and subtleties. Great video - definitely "advanced" and challenging.
Thank you, I'm glad you enjoyed I wasn't too sure about this one I felt like it was a bit muddled. on call Can be rather stressful so it's kind of hard to make videos. But at the same time I feel like a lot of the on-call calls are really good video calls 😆. It is quite the conundrum
@@gendronhvac-r1269 it all depends on why the viewer is watching, I'm trying to learn new things that I may not have ran into yet. Plus we mainly use Emerson so anything I can learn from you on the Danfoss controller is a bonus. Unfortunately where I work nobody gives away knowledge like you do, that would be to simple😅👍👍
@@HVACRSurvival After a lifetime of supermarket refrigeration, I can assure you the number one reason that few give away knowledge is they are on the bloody edge of having NO knowledge to give. Hopefully you will find one or two "gurus" in your adventure in our trade.
Duly noted are the 'walk arounds' in this and recent videos. We can see were refrig is coming from and going to. They let the 'big picture' sink in. Thanks.
Was also one of the most realistic field videos I seen , when you explained how you could isolated every motor and check them , and how much time that would of taken .
Any amount of movement of the rotor will cause unreliable ohm values even on a good motor. Not saying your motor was good, but it's not a bad idea to confirm there's no windmilling. Thanks I enjoy the videos man.
Your companys rate isn't bad or maybe they're not paying you enough lol our rate in the NYC metropolitan area was around 140ish. I was always the first to sign up for sunday work lol double it up ! Question though, how come you guys are trying to run such a low head pressure ? 180 setpoint is 80° F saturation. I usually try to run above 90° due to oil issues
Efficiency mostly. The higher head pressure you have the greater the compression ratio is. The compressor will have to work much harder to move refrigerant which could result in the compressor burnout and high energy costs. When your store is spending $20,000 a month on energy a 10% savings becomes a lot over a year. But this is not like a hard-and-fast thing every Rack we run is set up a little different. If it has oil return issues we might set it higher. our first and foremost priority is that the store actually works and then we address the efficiency side second. But every system is different. I just kind of go off of what the engineers said and then what actually is happening. And then marry the two philosophies and move forward the best I can. I hope that helps. And yes my company actually doesn't even charge the rates I mentioned. We under pay guys and under charge.
@@gendronhvac-r1269 Totally understand my friend. Gotta cut down on the bills everywhere possible. As long as the rack doesn't have trouble and you can keep lowering the head pressure to help out the client in efficiency and decreasing wear at the same time then it makes sense. At the end of the day, as long as your happy and comfortable that's what matters. I rather make less money and be comfortable than be on edge/nervous all the time with some other high paying positions.
Min 18:15 The numbers you're saying is head pressure PSI, right? (and juggling the weather (cooler day tomorrow) vs. yes/no on sprinklers, right?) And "Calling my lead"... Sounds like some pretty well developed organization here - not like the "mom & pops" of residential. Well, I guess you have to ... like the ice cream disaster, big bucks at stake if there's a fail somewhere. DMM - just thinking out loud.
@@gendronhvac-r1269 Thanks. Most videos I can turn up the speed on the audio, but this one is helps to turn it down to 3/4 speed. That's okay -- "advanced classes are like that".
I can understand not having good hand writing because my hand writing sucks. But why feature it so much? You had over a full minute, at the 15min mark, closeup on your HVACR? or was it HCAC *wave symbol*
🤣 So I try really hard To keep the company I work for anonymous. So if I have to like, talk or do a voice oversection that I'm not showing equipment. I usually just show something like the floor or something like that. In this scenario I was in my truck waiting for the next call and kind of putting the finishing touches on the video and realized. I needed some more explanation. In later videos, I use a text documenthat. Just says gendron HVACR rather than my handwriting. But I was not skilled enough at editing at this point to do that. I am very much doing this all on the fly. So these videos are not professionally edited. I literally just slap them together. Anyway I hope you found the video informative and my handwriting entering 🤣
Min 1:10 What is a "1/2 sub-cool"? I think I get "economic sub-cool" (run as efficiently as possible), but "1/2 sub-cool" - my guess that's for when the Condenser goes on "split" on cool/cold days? PS: great videos. They are packed with nuances the newbies can learn from. 👍
Half subcooler is just half the capacity of the subcooler. The subcooler does not always need to be run. If the weather is under extreme conditions then you would want to run both sides of the subcooler. It's kind of like stage one and stage 2 or another example would be like first gear to second gear
Min 12:30 You didn't pull out the fuses on the first visit to the Condensers,and explicitly said something about not pulling them (?) - but you pull the fuses on the 2nd visit. ??? Am a bit confused here. Could you elaborate?
I wasn't going to pull them out because I was just going to manual turn off at the controller. But then I realized I probably should just remove the fuses anyway as a further way of showing that those Motors are not good. Also it's safer. Alot of my videos I'm working though stuff while I'm recording
Min 18:55 I think you talked about this in another video, but do you get new fan blades when replacing a motor? [The motor has written on it what its specs are, but "getting a fan blade ordered right" makes me nervous.]
So typically if you call the condenser manufacturing they will have a replacement fan motor and blade on file that you could use with a part number. I typically order a new fan blade it's just easier than fighting with the old fan blade. there is a chance that the the old fan blade could break when you're removing it and then you would have to charge your customer more to order and the equipment would be down longer so in my eyes it's just worth it to buy new ones. There are many instances where the old fan blades are stripped out and impossible to get off. So again you would have to order a brand new one in that case so for efficiency sake I typically just order them new.
@@gendronhvac-r1269 Sounds good (TG the fan blades come "package deal" with the motors). 👍 ... About "busted fan blades", I've watched too many videos where the guys are struggling to get the fan blade off, and the inevitable question comes, "couldn't the guy who installed it out a little grease on the shaft"? IDK... seems like the "professional courtesy" thing to do.
@@hg2. Sure you could grease it but some of these motors have been getting rained on for 10 years. It would still be hard even if you grease it initially. After 10 years of the weather rust is bound to happen
@@hg2. I mean all of this really is dependent on your customer. You know? If your customer wants to run as cheap as possible then I guess you would just remove the old fan blades and reuse them. But if your customer wants a higher quality of service then replace them. For me it also depends on what I am replacing on a large condenser responsible for $100,000 worth of product I'm just going to replace the fan. In like a deli case I will just use the fan that's there. Or for example if I could get the fan motor but the fan blades were not in stock I might just use the old fan blades so the repair could be done quicker if I thought the fan blade look good enough to use. I'm sorry I wish I could give you black and white answers but a lot of these things are situational dependent. Also some of them are work philosophy dependent as well. There are many ways to skin a cat and you're just going to have to kind of develop your own way of being. A lot of it will be influenced by what type of work you're doing what type of area do you live in what customer you're dealing with so on and so forth. Also what does your boss want. Are you doing contract work or time and material. All of these things add up to too influence how you approach a situation I hope that helps
A surge tank operates a little different than a receiver. So a surge tank as a solenoid and a couple times a day the solenoid just turns on and pumps hot gas into the receiver to push out the liquid. Where a receiver will typically have a receiver pressure regulator. This will keep the receiver at a certain pressure and will naturally push out the liquid refrigerant.
wanna see cool i had summer job at a&p warehouse supermarket.. well i saw workers wearing winter clothing in a hot summer.. they cooled an entire half football field probably more with trucks backed in foods coming and going. It was darn cold..i talked with system tech 2 systems for redundence use amonia as coolent.. they were hugh.. the whole area was hugh amazing freezer cold.. rip a&p..edison nj
Got me all confused, need to slow down and fix the camera from shaking. with your camera set up we need to take Dramamine to keep the sea sickness down. Your going to fast when explaining the troubleshooting.
I can try to work on the camera shaking in the future. It is just very difficult because I have a deal with my manager that these videos will not take Away from my work. If so I tried really hard to respect my manager And my employer by not taking a lot of time in making these. So it's tough to increase the quality without Affecting my job which I don't want to do because it would be disrespectful. But I will try to keep the camera still I hope The videos help you :)
No, Subcooler moves heat out of.the building more efficiently. Desuperheater cools down the gas before it hits the compressors so it doesn't over heat.
@@gendronhvac-r1269 Right, I should have been able to figure that out. For the memory cards: Sub-cooler RAISES the temperature of suction gas (benefit: lowers temp of condenser liiqud). De-superheater LOWERS the temperature of suction gas (benefit: lowers temp of compressor; this is the one that "sprays refer on the suction pipes" and then the gas goes back to the start of the compressor cycle -- do I have that righ?). Do I have it right? [Makes me wonder about both raising AND lowering the suction gas temperature on the same rack at the same time. Does that happen? ]
@@hg2. Sub coolers can cause the suction temperature to increase in extreme weather conditions. But that's not what they do really. I have like four videos on sub coolers you should definitely watch those videos it's a playlist actually. But you do have it right for the desuperheater. It lowers the temperature of the refrigerant so the compressors do not overheat.
Lol 😆 No not really. They're only willing to pay for 4 hours worth of a PM. So pretty much we leak check the store try to get rid of any glaring major emergencies and then just buckle up for summertime. The customer won't allow us to do a full PM they're not willing to pay for it.
