I guess we are doing this, whether I'm ready or not right now, it's all good. Hopefully you guys are doing well. I had a busy week we're coming towards the tail into summer. Things get hectic, I guess I don't know it was kind of hectic all summer.

I think I bring my own stress because I think I just you know I can't let things go so it just gets kind of crazy but yeah. I was a crazy weekend if you follow any of my social media that video that I posted yesterday. That actually happened Friday night, so I edited that down real, quick and posted that up, but yeah that was a very stressful Friday night into my week, seems like those things tend to happen more and more, where things get crazy like that, so hopefully you guys are All doing well, I had mentioned you know we're coming into fall, so we're having those like this week. It's super nice where we're having like 60-degree nights, and then you know we get those 90 degree days, 90, 500 degree days and then for our area in Southern California.

We have like a trend so where I'm at in the Inland Empire we're gon na get this hot-cold hot-cold hot-cold for another couple weeks and then we're gon na get what we call the Santa Ana winds. It's gon na dry out. It becomes our fire season and then, after that it gets super cold for like well. For us, you guys super cold.

We don't know what cold is here in California, so super cold for us is an extreme, absolutely extreme low. Maybe for like one night, we might get down into the 30s, but on average we maintain about 50 degrees during the winter and then during the day at nighttime and then during the day you know it might get up into the mid 70s or something so yeah. Our winters are very mild and I guess maybe that's the appeal with this crazy state, with all the crazy stuff we have is maybe just the weather and the scenery. I guess I don't know it's kind of hard for me to say, like I hear people saying that they really dig the scenery here in Southern California, but I see it every day.

So it's just what's normal to me, but yeah. It is what it is HVAC. Our truck or Rodney, thank you so very much for the super chat. Man really appreciate that so hello to everybody, that's coming in here I have got some stuff I want to cover, and then I want to try to get to your guys's questions as usual.

Okay, so, as usual, try to put your questions in caps-lock I'll try to get to them. Yeah Matt Gordon said heater startups. I actually had a guy doing a preventive maintenance today and we started for the month of September. We started doing our heat PMS, which, again for us heaters, don't run very much so for us to start up a heater.

What we're gon na do like, let's just say, we have a carrier, smaller package unit, we're gon na go ahead and pull the because most of our stuff is down shot, meaning that there's no ductwork coming out of the side of the unit. It's just going straight down, so we'll pull off the side shot covers on the carrier units fire, the heaters up, burn off all the crap from the summer kind of vacuum out the combustion compartment and then just check the heat exchangers for cracks. We're not running combustion tests or anything like that. Customers, usually don't want that stuff and again we're not gon na fire heaters for a while.

But some of my customers aren't gon na get a preventative maintenance for another three months and then we'll be in the middle of our winter, our really cold winter. So you know we just kind of try to start some of the stuff up right now, but it kind of sucks with the heat pump units, because we do have heat pumps out here too, and for those of you that work on heat pumps, you know what I'm saying when it's really hot outside it's, you know you can't really run the heat on those things because they just you know the it yeah they just go off on high pressure overload, because it's just you know the evaporator, which becomes your outside unit ends up. You know running in a hundred and ten degree weather, so can't really do heat startups on heat pumps right now, but yeah. So all right, let's see what we got in the chat going on here and let me see uh-oh.

So it's it's a little choppy huh! That's weird, I wonder: what's up with that, let's see, let me see if I can fix anything. I don't know what that's about. I don't have anything going on huh interesting. It doesn't show me as dropping frames either.

That's strange is it clearing up? I hope interesting. You know, hopefully it's clearing up there, so that's weird yeah everything shows good on my side right now. I don't know what it is I'll just keep going, and hopefully it clears up. Let's see Dave, you asked how important the pre coolers are for refrigeration rack systems.

In the state of California, you have twenty-five locations which will all have oh, where they all have been disabled Dave. You know it just depends on the the particular area you're in and the weather. Is you get out into the low desert, which is the Palm Springs or Coachella Valley? The pre colors are pretty important, especially on older equipment. The newer equipment is sized accordingly and can handle the higher temperatures, but a lot of the older equipment.

Wasn't you know it wasn't sized for the extreme highs and out in the Coachella Valley in the low desert area they can hit 120 degrees in the summer, which would mean that if you have an older condensing unit, you're doing what 30 degrees over that so you're. Condensing temps are quite high, so yeah pre coolers really help where we have the extreme highs. Now, in my area, the Inland Empire, you know our summertime highs, like our averages, are about 110 ish, so pre coolers really don't mean too much. I mean they would help, but I think that they would waste more energy in the hundred and ten degree weather versus the hundred and twenty degree weather.

It would really really help because you got to remember the pre coolers are an evaporative cooler. Essentially that's a media. That's gon na evaporate the water and cool the air. You know down 1020 degrees, depending on how its sized to try to lower the condensing tempo, the equipment so um.

Alright, let's see what else we got in here. Okay, let me see: what's the easiest way, to check to see if a defrost timer is shot red? Oh Felix it. You know it really depends on the defrost timer, but the best way is to mark the timer, whatever kind it is a grassland or a Paragon or Intermatic. I mean there's a couple more grassland and a dramatic the same one, but grassland and Paragons the biggest ones.

So mark it with a marker and then turn a stopwatch on your phone and see if it's tracked, you know the fifteen or thirty minutes whatever it is. The next thing you want to do too is go ahead and let it run into a defrost and then time it as it's going through a defrost, because sometimes they can stick inside the defrost and create a problem, but other than that you're just gon na have To kind of use your experience to figure out whether or not it's bad, obviously checking the contacts with ammeter and stuff is gon na help too so wow I do not. I there must be something wrong with YouTube because yeah I have an excellent connection over here. That's really strange and I'm not dropping any frames either.

So there must be something going on with YouTube very strange yeah, I'm fine, hmm yeah! I don't know what the dealio is with YouTube. It's very very strange and it's not even showing that it's freezing up. Let me see here: mmm yeah, it's it's not showing any problems here, that's very interesting! It's just one of those things where YouTube's gon na be a pain in the butt tonight. I think it's a problem with YouTube and I don't think I can do anything with my bit right here.

Huh very interesting Dave. Thank you very much man, hopefully, hopefully the I don't is it? Is it choppy for everybody or is it just some people yeah? That's really interesting: okay, so HVAC rookie, I'm just gon na keep going guys. If you can't take it, it's cool drop out. I don't know if this is still working or what this is weird, so HVAC rookie, you said regarding the exhaust fan video.

Could I have just cut the shaft to get the blower wheel off? Unfortunately, I couldn't get to the shaft on that, because of the way that there was like a bracket and the way. I guess if I got a really really long. If I got a really long, sawzall blade, maybe I can get in there at an angle and cut the shaft, but it was just I did. I couldn't even get the motor either, so it was easier for me to go ahead and uh for its California.

Censoring me yeah. That's right, huh yeah, guys it's a YouTube thing, because I'm showing that my stream is strong on my side. So interesting yeah. If it's a problem like I said you know, you guys, can drop out.

It's cool. I understand I'm just gon na keep going now for those of you that it's working for so I'm just gon na keep going with it but yeah okay. So let's go ahead and go into that video. So I released a video yesterday about an exhaust fan situation that just turned into another one of those debacles for me, okay and that particular exhaust fan, the customer called me said it wasn't working.

I went out there. I found that the motor starter had basically exploded for those that can actually see. This is the motor started right here in turn just exploded, and it's shorted out the motor too, which is a trip the motor starter didn't trip like it should have. There was a direct short, the wires shorted out shorted out, I mean the wires shorted out and then just caused.

You know an electrical fire and you know just fried the motor. Basically, sorry, I was a little distracted, I'm tripping out by the stream, but I really don't know what else to do so. I'm just gon na keep going, so I had to make a choice and I had an exhaust fan at my shop and I kind of had a feeling that I was gon na have to change the fan, because I knew it was gon na be difficult to Get that particular direct drive motor, and this is one of the problems that we have with these new direct drive. Exhaust fans is a lot of times.

It leads you to it's hard to find a motor supplier. That's gon na have that motor, especially on a Saturday morning. You know I can open some up, but my thing was was: how long was I gon na spend trying to wait for someone to come out and open up the motor shop, and, let me know you know whether or not they had the motor verses. I had a fan at my shop and I just changed it so just so that you guys know the facilities I contacted them today of that particular restaurant chain, and they were like more.

They were just ecstatic that I went ahead and changed the fan. They were not upset at all they're like whatever, because again like I said I I understand that they're concerned about downtime. They don't want downtime, they don't want the restaurant closed. They just want that fan running.

So you know if it was easier for me to change the whole fan, then so be it. They just wanted it changed. So luckily I had one and they've already ordered a replacement one for where that was supposed to go so and let me see what else we got going on here. Oh that's funny! Then you won't know when I moved that's right: huh, okay, Eric you guys.

Thanks for these super chats, you guys are blowing my mind man, you guys. The super chats are awesome. I really appreciate it. Okay, thank you guys.

Ok, so Sean Sean asked me how the apprenticeship process go in the United States. How long does it take to become a journeyman? Well, it depends ok, because we have certain areas in different parts of the country. Ok, so if you're going with a union company majority of us are not union. Ok, so if you go with the union company, then you there is a certain time frame for an apprenticeship and I'm honestly not educate enough to answer that.

Okay, but as a non-union company, which is what I am an apprenticeship, really is just until I release you to the wind, you know so you know the my Tech's will ride with me until I feel comfortable enough to go ahead and start sending them out. On light service calls, I won't drop someone right into the middle of hell, I'll release them into light stuff. Doing preventative maintenance is little bits at a time and then eventually they can go full and start taking care of everything. So let me see what else what we got, I'm just reading the chat here right now.

I me myself and I farmer, I'm gon na, go ahead and answer right now. I won't ever mention what restaurants I work in and I'm gon na be honest with you guys people and I get it. I know you don't mean anything by, but people are always trying to guess the restaurant chains and most of the time, if I see people guessing most of the time, everybody's wrong every once in a while. Someone will guess right, but I just delete the comments because I'd rather not mention any restaurant names period in my chats to protect my customers and to protect other restaurants too, because I don't want to talk crap about restaurants or anything like that.

Okay, so I don't mention or reveal whatever my customers are and when people do you know mention about it. Unfortunately, I have to delete those comments inside YouTube, so yeah just to protect my customers - and I know some of you guys know where I'm working, because you know you work in the same kind of chains, but I'd really appreciate it. If you guys keep that to yourself so that way just to protect the customers, you know, and so that way I can continue to make these videos I'm not doing anything wrong and making these videos. But we don't want to cause any bad press for anybody that we don't need to.

So, let's see what else! Thank you very much. Dell walki Pina. I really appreciate it. Man, okay, there you go HVAC rookie, so Union is five years in California, but after six months you can test out.

That's good all right. Our defrost clocks really accurate, or is there a couple minutes of leeway, Zac churro? Hopefully, I'm saying that correctly yeah there's a couple minutes leeway there they're, not a hundred percent correct, so there is leeway in the amount of time I wouldn't hold them like to a tea, but I mean, if it's more than fifteen minutes, then yeah there's probably something Wrong yeah Ernesto, you yeah you and I work on a bunch of the same restaurants. That is true so, and I think I guessed a couple, I think I guess the restaurant, where you had to change a circuit board the other day Ernesto, I'm pretty sure. I know what chain that is.

I recognize something that was in the video, so alright, so for those of you that are just coming in here. Apparently, YouTube is really malfunctioning today and there is really glitchy video. It's not me. I've got a clear stream, I'm not dropping any frames and I've got a good connection.

I can see my internet speed and everything so something's going on with YouTube. If you guys can't deal with it. I totally understand some people are listening. Just for the audio, some people are saying that it's working where they're at so more power to you.

If it's working, if not, I totally understand guys so alright, so Justin, you asked me, do the larger chains or do I think the larger chains are easy to work with as an approving pricing or other way around. So here's the deal as a small business, because that's what we are when I work with restaurant chains, I find it easier as a business to work with a restaurant chain because stuff tends to get approved more often. Yes, you have to jump through some hoops. The difficult thing about working with a big chain is the pay process.

Okay, if you're lucky you're gon na get paid in 60 days, okay, it might be 90 days, it might be a hundred and twenty days and unfortunately they don't let you charge them late fees or anything like that. That's just the way that commercial chain restaurants work, especially the big ones: okay, there's like a process and if someone messes up on their particular job and doesn't input the numbers at the right time or the invoice at the right time, then what happens is the the Process starts all over and then we have to wait another 30 to 60 days. So that's one of the downsides to working for big commercial chain. Restaurants, the upside is, is they always pay their bills as long as you don't cheat them, and they continue to give you work and usually they let you do some kind of a preventative maintenance, but a lot of them are cutting back on those.

So I find working with commercial chain - restaurants, easier myself. It can get a little repetitive working on the same stuff over and over again, but you know it is what it is all right. Let's see what else is it normal for a freezer to make an abnormal ice pattern or eve even make the hissing sound in the evaporator during hot pulldown Ralph? It's not really a great thing for it to make a a abnormal ice pattern, even on a hot pole down the ice pattern should be pretty even it should be frosted up pretty evenly the hissing sound that you're hearing is usually it just depends because I'm not There hearing it but a lot of times it's an indication of vapor going to the expansion valve in the expansion valve trying to meet her vapor refrigerant. So but again it's hard to say for sure.

Okay, I don't want to lead you down the wrong path. The big thing is is that the unit needs to be defrosted completely and it needs to have a clear sight glass and then you want to let it come down in temperature. So um, let's see what else right on yeah sinister sparky says it's glitchy, because there needs to be more like so hit the like button, guys, alright, yeah and commercial chains are direct deposit, that's exactly the correct! They. They put it right into there.

Just sometimes you just got ta wait a little while so HVAC rookie do. I have do not exceed or do what's needed for those restaurants. So all 202, three three of my big restaurant chains have do not not to exceed values. Nt ease - and you know we - we have to follow those, but a lot of them have told us basically do what it takes to get the restaurant operating.

I've worked with most of my chains for a very long time, so I have a very good relationship with the facilities departments and the corporate department. So I know what needs to be done to keep them operating and I know what you need to ask for permission to do so. Yes, we do have not-to-exceed values, but for the most part we are told, like you know, if it's an emergency situation, you got to do what you got to do so, for instance, my exhaust fan that I changed over the week in the video that just came Out yesterday that I didn't even call facilities, I just did it and it was overtime. Three guys.

I know that. That's what needed to be done, so we just did the work and they were more than happy and ecstatic because they needed it done. Okay, but again, if you come in, you know the bigger you get as a company the harder it is for text to make those decisions. So it's easy because I'm a small company we're a small shop.

The the corporate office is only dealing with myself and my dad and that's it. So that's the only people that they deal with so there's. So we know what we need to do so all right, yeah man, I'm so bummed out about the choppy stream. But okay, let's see what else! Okay, I've got some stuff I want to cover here.

So I want to answer some questions that some people had asked me. Okay, so Dan had asked me about adjusting super heat on multiplex systems that have been designed incorrectly. Okay and I'm just kind of explaining, so he sent me an email. He basically said he just took over a location that has a multiplex system.

They've got one digital compressor on the roof and a giant rack, and it runs multiple things down. Stairs walking, coolers, prep tables, open display cases is all kinds of stuff. Okay, and what he's, having a hard time with, is he has really low superheat. Coming back to the compressor and he's trying to figure out, which valves are flooding which valves are starving and he's just having an issue, he's also found that some of the valves were incorrect, meaning that they had the wrong refrigerant stamped on him and that they had Someone come in and correct them and put the right valves back in the system and the reason why he shared this, and the reason why I bring this up is is when it comes to a situation like that.

We need to make sure that we are thoroughly going through everything and making sure what I would do in that situation is. First, I would find out if everything is sized correctly, because the fact that we found wrong components - and there really makes me sketched okay and a little worried - and this is a new facility. So what I would suggest that you do Dan is first, if anything is iced up, make sure everything's D ice. The next thing is is make sure everything is sized and you have all the right components, compressor, size, evaporator sizes and all that stuff.

Okay, note down anything, that's wrong. The next thing that I would suggest you do is check all of your strainers before your expansion valves. If there is any make sure you don't have, any pressure drops make sure your filter dryers are clear, no problems with those. Once you have that going, then what I would suggest you doing, he said he found several valves that were like opened or closed all the way.

So what I would do is to start in the beginning and go through and put every valve on that system back to the mid seated position or the normal position that it came in so an expansion valve the easiest way to do that. A lot of times. People start wrenching on them and you don't know where it's set up. So what you do is back the valve all the way out.

Okay, all the way out until it won't go anymore and then you're gon na close it all the way and you're gon na count the terms close it all the way and then you're gon na whatever that that the turns that it goes in. You divide that by two and that would be the middle position. Then you back it back out to the middle position and you start from there. So I would suggest you do that Dan for every single valve get them all back into the normal position.

Another thing that he mentioned was that a lot of the sensing bulbs are not strapped correctly, so figure out a way to get those on a solid piece of pipe dan. You had mentioned that, like one sensing bulb on a walk-in cooler, I think you said, or a walk-in freezer they didn't pipe it correctly and the only place to putt to mount the sensing bulb is on the vertical rise. That is not correct, but unfortunately, in this situation, what I would suggest you do is go ahead and mount it on the vertical temporarily insulate it really good and go ahead and adjust your superheat and set everything up then get all the other systems set up and All the super heat set on all the valves and then go to the customer and say hey. We need to fix this and let them make that decision on whether or not they want to adjust or have you repipe that to where you can properly.

You know strap the sensing bulb. The other issue that he had was he's noticed, and this is a multiplex issue - is as he's trying to adjust. Superheat he's noticing that the suction pressure keeps fluctuating because multiple components or multiple circuits keep pumping down, meaning that they satisfy the solenoid valves closed and then the suction pressure either goes up or down when they open and close. That is, unfortunately, one of the issues with multiplex systems.

It does make it a little bit more difficult to check superheat because you've got kind of like a hunting valve. You know as your as your pressures increase or decrease, then. Obviously your valves gon na open and close. So you know if you can get everything to call it's the best bet, but I know it's kind of difficult and it's just one of those things you just got to kind of adjust it and just just keep working with it.

Okay, so after you set all those valve superheat, then you know you can try to evaluate and figure out if one of them is flooding or something like that, once you get them all set to the mid position, then you can see hey if something's flooding, you Can check by doing temperatures coming off the suction line coming out evaporate and you can compare them to the other boxes as long as the box. Temperatures are the same. So hopefully that answers some of your questions there, Dan Ernesto, you said you just worked on an r2 90 unit and someone installed the mechanical control. Can that cause the evaporator to ice up? Also, another r2 90 all components shut off, randomly temp control going bad, okay.

So Ernesto know, a lot of the new regions have energy efficiency, things built into them, and evaporator fan motors will cycle on and off when the box is satisfied at different times. So you always want to lean on the manufacturer to find out, if that's part of their control strategy, so, for instance, delfield they constantly will take if the box is satisfied, the temperature controller after so much time, there's an algorithm built into it that it'll shut off The evaporator fan motors and what they're trying to do is not draw in any more warm air into the box and it'll leave the evaporator family doors off until a predetermined amount of time and then it'll turn them back on it'll kind of stir cycle them. So turn them on run them for a second, then turn them off and then just kind of keep moving air. So it's not always uncommon for an evaporator fan motor to cycle on a medium temperature refrigerator if it has the digital control, especially if it's one of the new r2 90s.

I would highly suggest that if you found an r2 90 system that doesn't have a factory component in it that you not even play with it until you get the right components back in it due to liability reasons. So, okay, so Shawn am i okay with Flair joints or do I finally, eventually leak ever ever tried zoom locks? Oh no, I have not tried zoom, lock I've thought of some instances recently where I think it might be something cool, but I haven't used it yet. I do use flare fittings constantly I'll use them on the roof. I'm not a fan of using flare fittings down at the evaporator and the low temp section due to expansion and contraction.

I find that, in my opinion, I have more problems with flares backing off. I have absolutely no problems with flares backing off or or leaking when I install them on the roof. So the reason why I install flares on the roof is, I put them at the liquid dryer and the sight glass. So I'm a lazy person by nature.

So I'd rather not have to drag my torches up on the roof after I fixed a leak down at the evaporator. So if I can just take a flare dryer on the roof in my vacuum pump, then my life is easy and I've saved myself some time and I just you know, work smarter, not harder. Basically, okay, so I use flares on the roof at the liquid line. Filter dryer, when possible, just to make my life easy all right, yeah Ernesto than yeah, it sounds like you might have a temperature controller issues for sure so yeah exactly I will superior.

I try not to blow people up, but definitely all right. So, let's go to another question here: Eric asks me he's going to a company that does light commercial versus residential okay, so he was doing residential and he's going to a light commercial company and he was kind of curious what light commercial meant? Okay, that's kind of a vague term light commercial - I don't know if they do refrigeration or air-conditioning or both, so I'm just gon na break it out. So I consider myself to be a light: commercial refrigeration, company. Okay, I do refrigeration work, basically five horsepower and under, and I do air conditioning work, basically 35 tons and below.

So I consider myself or that to be like commercial, refrigeration and air conditioning anything bigger than that. I consider to be commercial and then there's also the industrial mark somewhere in there too. Okay, so all right, let's see what else have I ever seen a time clock rotating in Reverse HVAC apprentice? Yes, I have. I have seen that I've noticed it before and it's usually a bad motor or something like that.

Obviously the clocks bad, but I have seen that so very interesting. All right, let me see what I'm missing here. Have I had any issues with Hoshizaki is new. Our 290 reach-in coolers TXV he's getting too cold.

The fix is warming up the valve with warm water and then returning with their TXV warmer heat trays. No I've never heard of that Robbie gee. That sounds really interesting. That almost sounds like they've got wax buildup.

That was an issue that we had when we were using a lot of 4:04. When that first came out, we were having a lot of waxing issues and we're like something would get stuck in the valve or his moisture or something, and you would have to heat up the valve to get it to operate properly and whatever was in there would Would like free, you know, start moving through the system, but no, I have not had that issue on the Hoshizaki. Yet it's that's a very interesting issue. So all right, what else we got when checking sub cool from a discharge port versus a liquid line port? What differs? That's a very interesting question: doc.

Mannix, that's a very interesting question, so you ideally would want to check sub coin from a liquid line. Port, ideally checking it from a discharge port. You might have a slight temperature difference, so yeah I personally would be checking it from the liquid line port so like on the Linux units. You know we have an actual liquid port.

Sometimes the manufacturers don't give you a liquid port, so you don't have a choice and you just have to use the discharge line but yeah. That is a very interesting predicament and that does exist. So all right, so I'm gon na go ahead and get to a couple more things on my stuff right here. Do wait huh, so Dwayne had kind of a funny thing and I just thought it was something cool to talk about so Dewayne had to emailed me and he said: hey he's a retired technician teacher.

You know he's done it all he's a retired gentleman that helped in this industry for a very long time, and he was just kind of curious where all these videos were when he was in the trade and when he was teaching - and you know that kind of Made me laugh because I had the same problem: okay, when I was coming up in the trade, information was not readily available and we had to really search for it. The internet was still new. It wasn't, as quite you know, his popular message. Boards weren't quite there when I first came up in this trade and you know - and I got a little bit of information from the people I worked with, but I found that other technicians were a little stingy and sharing the information.

So that's why I make these videos in general is just to try to make that easier for everybody else. To share the little bit of knowledge that I have with everybody to try to make your life a little bit better and hopefully teach you guys the mistakes that I made. So maybe you won't make them okay, but it is an interesting predicament and I'm sure some of the older guys in the chat would agree to that. You know nowadays it's it's a lot easier to get information versus a long time ago, when we had to actually go to crazy training classes, and you know read books, and you know it's so easy just to ask the Google now so.

Okay, let's see what else I'm just reading the chat here says: okay, Rick asked me: oh, this is another good one too. So Rick had asked me: how do you verify calibration of the JobLink probe versus a traditional compound gage? So he has a compound gage. That's reading, like I think he said ten or fifteen psi off what his JobLink probes were reading and he wanted to know which one was more accurate. The easiest way that I find to do this is to use unknown pressure.

Okay, what do we know if we have a single component refrigerant or an eery zeotropic refrigerant? Okay, let's take 410 a which is near azeotropic right, so it doesn't really have too much of a glide, but it's best if you can find a single component such as r134 or r22. Okay, if you have a tank of either one of those refrigerants in your shop, leave it in the shop overnight in the morning time take the temperature with a normal digital thermometer right outside the right near the tank. Okay and the entire refrigerant inside that tank should be that same temperature. Put your compound gage on there and put your digital gauge on there.

Look at the temperature or the pressure temperature, or look at the saturation temperature of the refrigerant okay and find out what your pressure should be at that ambient temperature around the tank. Once you've done that, then that'll tell you which one of those gauges is working correctly and that's the correct way to set a compound gage to a lot of people used to think that you would just zero the gage out at atmospheric pressure. But that's actually not correct. What you would want to do is set it using the the saturation temperature of a known, refrigerant.

Basically - and you know, check the pressure on the gauge versus what the temperature of the refrigerant is, because we know that if we have our twenty two refrigerant, we know that it's going to be a certain temperature at a certain pressure period. That's it no ifs, ands or buts. So long as it's not mixed, it's going to be a certain temperature at a certain pressure or vice-versa, so we can use that to verify calibration of our gauges. So, let's see what else we got here, mmm yeah Eric! I got thrown into the wolves too, so it's definitely interesting.

Let's see what else do I recommend adding defrost time on a walk-in cooler, Ernesto yeah, your your recent video, where you were talking about defrost yeah, my minimum defrost on a walk-in cooler is for defrost a day for 15 minutes, absolute minimum, no less than that for Defrost a day for 15 minutes, usually what I'll try to do is throw a defrost in the middle of the night sometime for like a half an hour when nobody's there. Hopefully they don't have walk-in alarms. Okay, so you got to remember something when you're dealing with a walk-in cooler, a walk-in cooler is a medium temp box. It's maintaining 35 degrees right okay.

So if it's maintaining 35 degrees, your evaporator t-d indicates that, when it's running typically that walk-in coolers saturation temperature is gon na be 10 degrees below the set point of 35 degrees. So that means that your evaporator is gon na be getting down to 25 degrees. So if you didn't have enough defrost in there, what you're doing is you're relying on the off cycle, defrost, meaning that when your thermostat turns off - and you have it turn on at let's say 40 degrees, then your your your waiting on the air, the 40 degree Air to run across that coil and defrost any ice particles, so it's perfectly normal for there to be. You know some frost build-up on a walk-in cooler, that's maintaining the 35 degree box.

Now, as we set our temperatures lower and lower. So obviously, if you set it at 40, you're gon na have a 30 degree. Coil temperature, if you set it at 35, you're gon na have a 25 degree coil temperature. So yes, I do agree with having more defrost on a walk-in cooler.

So my minimum defrost on a walk-in cooler is 4 defrost for 15 minutes. So let's see what else all right - and this is another good one too. So this person asked me a question. They said: hey, I really like your videos, but they said why do I change so many parts when they're not necessarily bad, so I am a person that likes to look at the big picture.

I solve via big your diagnosis. I take educated guesses and I use personal experience to decide whether or not I'm going to change other parts. Okay and what I mean by that is, you know I'm in there, and I find that I have to condenser fan motors in a really hot climate, where I know from history from previous history that we have a high condenser fan motor failure rate more likely due To heat, because if I'm out in the low desert or something working out in Palm Springs area - and I have one condenser fan motor - that goes bad but they're both the same age - I'm gon na change, both condenser fan motors, because from my past experience, that's gon Na bite me in the butt and the customer is gon na call me back. I will tell the customer it's not like I'm trying to hide something from the customer, but I will I will.

I will sell it to them. Basically by saying hey, look. Here's the deal we have two bad fan motors. I really think we should change them both or I went ahead and changed them both because you know I don't want him to go down with the on on the weekend and cause.

I you know you're walking to go down or something like that. So you know I just take educated guesses based off a personal experience. I'm no way trying to rip off the customer, but you know if I'm going to, for instance, let's say I have a true reaching cooler that has a capillary tube okay and it has a refrigerant leak in the evaporator. I'm changing the capillary tube and the suction line at the same time doesn't matter, especially if it's in the evaporator, because if there's a refrigerant leak in the evaporator, the box is going to probably pull into a vacuum.

More than likely it's gon na pull moisture in the system or a lot of times on reaching coolers the customers don't maintain them properly and we have high condensing temps which cause the capillary tubes to plug up. So from personal experience, if I have a refrigerant leak on a prep table, that's a cap tube, I'm changing the capillary tube. Also, so it's just one of those things. It's it's kind of an educated guess.

It's kind of experience you just kind of know when you need to change some components so have I ever seen multiple time clocks on one unit yeah I have I and and I've had to disconnect other time clocks. So I've got a refrigeration rack made bike iraq that has a time clock for the compressor up on the roof, and then I have reaching coolers it's a multiplex system and I have some of the reach-in coolers that I'll have a time clock in them too. So it's double time clocks and it causes problems for sure. I have seen it all right.

Let's see what else bill bill, you had asked a curious HVAC guy. You had asked in my previous stream, if I ever considered getting into teaching or if I was gon na, continue to run my company um. I've thought about getting into teaching. But I'm gon na be honest with you guys the money's not there and I'm not asking for some crazy salary, but I'm not gon na go become a teacher and make less than I'm making right.

Now it's not happening. Okay. I firmly agreed that a good quality teacher - I'm not saying every single teacher, but a good quality teacher - deserves to make quite a bit more than the service technicians. He is training.

So if I was to go be a teacher, the money would have to be right for sure. Okay, I think we need to get away from the trend of taking retired service technicians and making them into teachers. Sometimes that's great. Sometimes it's not, and that tends to be our.

I find you know what one of the biggest things in our trade school is. You know they're all retired teachers and I feel like sometimes again, I'm not generalizing all of them, but I feel like sometimes you know. Maybe they didn't make it as a tech. Okay and again, I'm not saying that about every single teacher, but there's some teachers out there that I clearly know should not be teachers: okay, they're, you know they're retired they're grumpy, and I can tell by the way that they teach that they were never good technicians.

Okay, but again, I'm not saying that's every teacher out there, I'm not generalizing everybody, but so you know where I'm going with this is that I feel like yeah. We need to have some younger blood in the trade schools in the community colleges for sure, but the pain needs to be there and it's not there right now so definitely definitely needs to be hired before I would consider becoming a teacher HVAC apprentice. How would I give a raise to my employees performance, wise or annually? It's kind of based off of both. You know we try to be a remember.

You know they've worked for us for a good time for a long time, so we try to take care of them, but we also expect everybody to continue to excel. I don't expect him to jump, leaps and bounds and be crazy technicians. You know amazing, knowing everything, but I want them to continue their education and Excel. So it's it's based off of time and experience.

Basically, so all right, let's see what else mmm okay, so I'm gon na go to another question here. Joe asks where I look for a new apprentice, this was from the last stream and I was just kind of going through the chat and reading questions that I didn't answer so where I would look for a new apprentice. It just depends. You know I look at the local trade schools.

I look for kids that have graduate or people that have graduated the program or are near graduating. I I would consider hiring someone that hasn't even gone to trade school before I've done that many times I've hired experienced people but as far as apprentices go for the most part, I'm looking at the local trade schools and community colleges and I'm usually taking recommendations so And then, but if I find I found mechanically inclined people that turned out to be the best technicians ever I had you know one gentleman that was a great car mechanic and you know we gave him a shot and that dude excelled beyond our belief. He doesn't work for us anymore. He's moved on to bigger, better things, but hey man.

He was one of the best texts we ever had. So you know, let's see what else hello to everybody that's new inside here again, I don't know if it's still being choppy, but I apologize YouTube is having a hard time tonight. For some reason it was choppy starting off. So I don't know if it's still doing it or not, let's see what else.

Ok, so here's another one Chris Chris had asked me what happened so, for instance, the video that I just had. I had mentioned that when I turned off the circuit breaker for the control cabinet for the hood system to turn off the control voltage. So I could pull the motor starter out of the cabinet. It set off the fire alarm and that's not correct in my opinion.

So Chris had asked me what happens if the customer wants me to cover the cost of the fire department, because the fire department showed off on the showed up when the fire department, when the fire alarm went off. So basically, that's not gon na fly with me. Okay, if it's something that I did wrong, I will gladly take care of it if one of my technicians left an ice machine off and my customer had to buy ice, I'm gon na pay for that ice or I have paid for it in the past. Okay, you know so, but if, if I'm doing something and I'm working on a reach and are working on this exhaust fan system that I did in this video and I turned off the control breaker and the fire alarm turned off now, not my fault.

No, I'm not paying for that. That's ridiculous! Okay and yeah, that's not cool! You know. I try to remember to tell people to put fire alarm systems on test, and I did say to my video that that's something that you should do is you know anytime you're, working on the hood systems or something put it on test. That is a good thing and I should have done it, but it's not my fault that systems not wired correctly.

When you shut off the control voltage to the hood control panel, it shouldn't set the fire alarm off the fire alarm. In my opinion, and again it depends on mechanical code in your area, but the fire alarm in my opinion, should only go off if a duct detector trips in a fire condition not a supervisory condition and if, if the interlocks switch in the fire suppression system system Closes then sure yeah, the fire alarm should go off or if someone pulls in hands old pole station or a fire suppression pole station yeah. Definitely a fire alarm should go off, but it should not go off if you lose power. So what happened was when I turned it off the fire alarm immediately went off and I told the customer to call the alarm company try to stop the fire department and they couldn't a fire department still showed up.

So that was a disaster that happened. What is my biggest asset to me in this business? What is my biggest asset? I don't know what you quite mean by that reto Felix. Give me some context to that question. But what is my biggest asset? I mean that's like a very vague question, so I don't really know where you're asking for that one, but give me some context and I'll try to answer it.

Okay, where's I'm trying to get to the bottom. Okay. Do I have any ideas what's wrong with your a/c, the compressor starts and stops, and it's warm super gamer. I Justin had just given to you some advice, but I the electrical components inside your air-conditioning system are very dangerous: okay, typically 240 volts, but even anything as low as 120 volts.

If, if you touch it in the wrong way, it can hurt you, it could possibly kill you, I mean that's extreme, but it could. You've got to be very careful working with electrical components: okay, very, very dangerous. With your air-conditioning system, you have a device inside of it called Hastur: okay, capacitor stores, energy for a short period of time and even after you have turned off the power to your condensing unit. If you were to grab your capacitor, you could still get shocked and it could hurt you or cause damage in a bad way.

Okay, so as far as things that I think you can check, the best thing you can check is is make sure that your filters clean okay, make sure that your condenser is clean. Make sure that the fan motors running when the compressor is running okay and make sure that your thermostat is telling the unit to turn on other than that? There's really a not not too much more. That. I would suggest that you would do if you find that your condenser is dirty.

I would still highly suggest that you call someone a professional, because there's still things that you have to shut off and be careful about getting wet, you can short out the motor, even if the motor powers turned off and you get it wet and you turned it Back on too soon you can cause problems, so there's a lot of components in your system that I wouldn't recommend that you mess with, because you can really hurt yourself and I don't want anybody to get hurt, trying to fix something. When you know it's saved forbid, you got hurt or something and you know, and then you look back and think man I should have just called someone. Alright, let's see what else I saw saw a comment up here. I want to answer it here: real, quick, Matt, Gordon, okay, Matt Gordon, you said s JVC and Ontario has a good instructor and pretty good students that were there when you went right on bud Matt yeah.

I know I think I know some of the instructors or I know of the instructors, because that's JVC Ontario is right around the corner. For me, I know a lot of the instructors that the local trade schools in my area, so what I ever put a three-wire sup go hard start on a vending machine type unit, HVAC rookie, you know as a temporary solution and that that brings a great question As a I'm, not a fan of hard starts, okay and there's actually a question here that I wanted to address so where's it at right. Here, okay, John John, you had asked me in the last stream about easy start. Capacitors, okay - and I had answered that saying.

I didn't quite know what you meant by easy start and then someone else had chimed in in the comments after the video saying they meant and easy start for, like a boat air conditioner, an RV air conditioner, and that's not what John was asking. Okay, John was calling an easy start. What I call a hard start: okay and that's basically a capacitor. It's start capacitor.

Basically, that's wired in series with think it's in series with the run capacitor and it's there to basically give your compressor extra starting to work. Okay, so I'm not a fan of hard start kits on compressors now, do they have a place and a purpose shirt they do. Okay, I will use a hard start kit or even - and this kind of goes into the sub go three and one start capacitor and relay built into one: I'm not a fan of those either. Okay, will I use them to troubleshoot and diagnose for sure, but if I have a compressor, let's say what we're talking about a hard start.

Now, if I have a compressor that won't start, I will consider putting a hard start on there, but I will tell the customer hey: this is temporary. This compressor is going bad, I'm not a fan of leaving a hard start on there. Okay, in my opinion, and again I'm just a u-tube person, so don't trust everything I say, but in my opinion, if you have to put a hard start on your compressor, it usually indicates that something's going wrong with that compressor. Now sometimes you can put a hard start on there and that compressor will last for another three four years.

So sure I mean that's great, you know you get more time out of it, then more power to you, but just the customer needs to understand. In my opinion, that you know a hard start, kit you know is, is a temporary solution for something that's coming. Okay, it's inevitable that compressor is gon na fail eventually. So hopefully that answers your question John and then also the question about the three and one that popped in there too so and that was HVAC rookies.

So all right, let's see what else? What else do we got? Are there web-based control systems? You sometimes encounter any good yes, and no so the web-based control system that I showed in my last video was Bay. Web thermostat, it's okay, I mean it's a little. The controls and the turning the units on and off is a little funky, but it's an okay system. It's not amazing, I'm not a fan of the web-based thermostats, but you know I mean they serve a purpose.

I was able to look and see before I went out to the site, but it really doesn't do anything more than let me look and see you know I can control it from my phone. That's about it! So um, let's see what else. Okay, I want to go so I want to go ahead and talk about something here, real quick. I want to talk about a little bit about it, cuz as we're coming into the fall right now.

I want to talk about head pressure, control valves, okay, head pressure, control valves - I don't know if you're still in here primetime, but I know you don't like him head pressure. Control valves are gon na start becoming problematic right now and it's not necessarily the valves fault. Okay, but I want to explain something so when we have a head pressure control valve the purpose of the head pressure control valve. It's essentially a valve that has three ports on it and, in a nutshell, it will shut off the flow coming out of the condenser.

Okay, the liquid coming out of the condenser and it will drive the head pressure up and it will take the discharge gas and dump it directly into the receiver and push theoretically liquid refrigerant down to your expansion valve. But here's the problem, if we're take, think about this, if we're taking discharge gas directly out of the compressor and dumping it into your receiver discharge, gas is not liquid right, it's vapor! So what happens there? What if we push vapour down to our metering device? Our expansion valve that's a problem because our expansion valves need a solid column of liquid. So what we have here this is a liquid line. Receiver, that I cut open.

Okay - and I want you guys to see this right here - is the dip tube there's a dip tube in the receiver, okay, and if you notice, there's about a 1/2 inch clearance underneath that dip tube what that dip tube does it is allows. This is the dish. This is the outlet of the receiver coming out here, and this is the inlet, so we dump refrigerant into this guy right here, which should be liquid okay. But if we have a head pressure control valve, we can even dump vapor refrigerant into there, but when we have a head pressure control valve, we have to have - and this is a common head pressure control valve.

This - is an l, AC valve. Okay, there's really nothing much to in l AC valve. This is a cutaway of an l AC valve and simply when the pressure in the system overcomes the dome pressure or the dome pressure overcomes the system pressure, this this valve either opens or closes nothing too crazy. Now we have what we call a winter charge, so a winter charge means that we're gon na have a certain amount of liquid all through the summer sitting in this receiver.

So, let's just say the winter charge, and this receiver is half full.