this video is brought to you by sportlin quality integrity and tradition well the day has come i've been kind of putting this one off but at the same time been a little too busy to deal with it so we are going to replace an evaporator drain pan rebuilding the indoor blower assembly completely replacing a compressor and then potentially changing the oil in the other compressor converting the entire system this is an r22 package unit over to 407c uh i'm gonna address it right now a lot of people why the heck didn't i sell them a new unit because you can't get a new unit right now that was the main factor yes the repairs are damn near going to be the cost of a new unit the customer realizes that you just can't get a new unit and they need an ac this is happening more and more because of all the shortages and stuff so we got to do what we got to do now i'm recovering the good refrigerant from um the good compressor it's our 22. it doesn't matter but it's not labeled on my gauges everything's tight i purged up to my gauges now what i do is when i make this connection right here i leave this loose okay this guy still has some vapor r22 in it so it's a good cylinder it's pretty much empty though so we leave this slightly loose and then we go ahead and open this now we're purging so that's how i ensure 100 everything is clean and good to go in this cylinder i'm going to go ahead and open it up and then we are open on the high side we're going to go and open on the low side right here right here for everybody that's going to freak out i'll go ahead and change it over to r22 not that it makes a difference but we're basically ready to go everything's running hit start we're good to go so i'm gonna go ahead and start disassembling the rest of the unit i have uh other people come in here in a little while um so i'll definitely have help with this we got our new evaporator here we're just unboxing it um we've got the system recovered but the only one that had gas was the first stage the one that was still running it still has good r22 in it this one right here blew the charge when it when it leaked out so that's an easy one we're gonna change both the dryers we've got the blower assembly pulled out we're gonna rebuild that because it's vibrating to all heck so we have new bearings a new blower wheel for that um evaporator comes out right here when we get the evaporator out you might as well change the drain pan but in this situation we need to because the threads are stripped out the threads strip out on the carriers all the time you know you can make do with some tape and stuff but given the opportunity we're changing this evap it's super easy and the drain pens are you know relatively cheap in comparison you can change the drain pans with the evaporator in place but it's kind of a pain in the butt so a little bit out of time there's the old economizer too well probably because that's not even operating so we'll probably get rid of all the economizer wiring eliminate a potential short good thing i brought an easy up because it's pouring right now go figure summertime it's not even like gonna be a big deal you can see it's just scattered thunderstorms right now it's crazy though but we're luckily i brought the easy up so put that over the unit we put the plugs back in this guy we haven't opened well we've opened it but we've got this guy in so it doesn't get full of moisture good grief go figure all right well we're just about ready to unsweat the condenser i'm probably going to wait wait for this downpour to stop and then we'll unsweat the condenser and then we'll just have to tape up the lines or something okay so we've got this guy in shambles right now so we put this here when it started to drizzle earlier then we put the easy up over so the rain's gone for the moment so i pulled the easy up it's rather humid out here i want to try to make this quick um we got the condenser out which i just did that for convenience we got the evaporator out so now we need to go ahead and get the new evap up i don't want to get like too crazy into stuff but like for whatever reason they ran all the thermostat wire through here i really would like to redo all of that but at the same time i don't want to reinvent the wheel right now i have enough work for me so we might just have to leave that stuff there i don't know but we're moving along like i said we've got everything out might as well change that evaporator drain pan now um the drain pan wasn't leaking or anything but it is damaged okay the threads on these go bad all the time and like i said you can kind of make that work but look at the cracks you know there's big cracks right there also look at how difficult it is to get back there and clean that that's all dirt and lint and stuff so this guy's pretty plugged up um but we're moving along everything's going good so far so this happened to me the last time well one of the times i changed an evaporator coil the evap coil is not the same size it's rubbing see this this piece right here that screws in is hitting every copper line going down and i can't even get it in so i have to go in here and trim these just like a 16th of an inch off of each one is what i'm going to have to do it's going to be a trick so we got to pull this holy vap out and then look at this this sucks too from shipping there's a big old flat spot right there it's not damaging anything but that stinks it's completely flat that was on the bottom side so we didn't even see that i'm wondering if we can straighten it later but all right well i'm going to get my die i have a little angle grinder and we're going to cut this down got the evaporator in i was able to uh straighten this out a little bit straighten this out a little bit it's not perfect but it's better than it was um got the evaporator all screwed in i ended up having to cut that whole inside thing just slightly down to where it's not touching anything so that guy's in we can go ahead and kind of start getting ready to pipe it in um and start slowly assembling the unit got our blower assembly again we got a lot of people working on this right now so we just set the bearing it's a locking collar bearing so we just set it on this side we'll center the wheel once we get this bearing pushed in um the old one everything was just out of balance so we put a new wheel shaft and bearings on this guy if you don't completely pull your condenser out of the system to split the coil and clean it you're a hack right no um i taped up the lines i'm just kidding but i taped up the lines we're gonna go ahead and clean this guy real quick we're kind of in trouble because this wasn't supposed to happen today it's about to start raining on us we have a 70 chance of rain i swear i knew i knew nothing about this rain but anyways we're going to keep going luckily we got the uh canopy so i've got the viper big boot blue cleaner uh the venom pack that one right there and we're just spraying this guy on here we're gonna rinse it i'll worry about straightening out the fins later because we just need to get this guy put back on i'm just applying some coil cleaner and then we'll give it a rinse we are hustling to get this done we're not cutting corners but we're hustling um got some nitrogen flowing we're going to braise in the first stage evaporator suction line and then we'll work on the liquid line after i was thinking about draining the oil out of that but we don't have time for that plus i'm sitting here thinking about it that compressor is really old and it's been running with a restricted metering device to be honest with you it's probably going to fail soon so we'll deal with it then we'll just make sure that we uh the the liquid line filter dryer is protecting the coil and we should be good to go so foreign all right cross our fingers it hasn't hit us yet the rain um evaporators installed economizers installed i wanted to like scrub that thing down and but we really don't have time for that filters are back in we're trying to avoid all this crazy rain right now um let's see all back through here we're good i'm still waiting on someone to get back because we're cutting out the cormax fittings so we're getting some teas some pre-made teas we put in a suction line filter dryer it's a high acid the one going to the compressor that was bad because it was a burnout um yeah we changed that because i had the 7 8 ones to make it work so we're going to put 3 8 liquid line ports when we put it all together but we're going to go and drop this condenser in here now we went ahead and put the thermostat wires that were running through here i secured them but in a way that they're not going to rub out with a double zip tie again i don't like the way that they ran but i really don't have time to reinvent the wheel today so condensers going in nothing is quite going back together the way that i want to but it's all working out um so what i do for these these access fittings is you just unsweat them it's just a silver soldered in so i just unsweat them and then i'm going to cut with a tubing cutter right here and then i have a tee that's reduced to 3 8 so it's a 5 8 5 8 3 8 and then we'll put the access fitting just like i did on this one right here so i believe this is my last braze joint then we got to clean up some wiring do pressure tests strap the dryers we still got a lot of work to do but we're getting there all right so we keep thinking we're going to get poured on but it's not it's sunny but then the clouds come and go go figure right all right so pressure test time we're gonna enter through the high side make sure we get flow through the low side we're pushing it through the dryer that looks good so we're gonna go to the tightness test and we're gonna run the tightness test on this guy currently doing a pressure test and while i'm waiting i'm combing the fins on this it's not going to be perfect it's you know it's never going to go 100 but the easiest way is to wet the condenser and then work your way from the good spots don't just tackle the bad go to the good and work your way over because when you get to a bad spot it's best if you like kind of just slowly inch into it like right here so i'm only going a little bit into the bad spot and then it just slowly keep working further and further over and there will be some spots you just can't get like this i don't know that i'm gonna be able to straighten this out right here i mean you could if you spent hours with a screwdriver but it's not really worth it that much all right we're pressure testing the first stage now it's gained two psi doesn't seem bad the first or the second stage past fine two i don't know which one i just said but regardless we're vacuuming down on the second stage because it passed the pressure test so it looks like we're gonna pass the pressure test on this one too five minutes and we've gained five psi so i think we're gonna be okay so again we're just kind of moving along we're gonna start taking lunches and stuff and then we'll start you know tightening things up and wrapping it up we're moving along we got the top on the unit now we passed the evacuation on the new compressor the second stage working on redoing some wiring and then also eliminating all the economizer wiring we're fixing some of the condenser fan motor stuff because they have a lot of capacitors spliced in here we're going to clean that up trying to clean up some of this low voltage wiring right here there's just a massive amount of it um evacuation on the uh second compressor that it's mdk i mean there's no vacuum stuff hooked up it's at 400 microns so that thing's doing great and then yeah we're just pulling down on the uh first stage compressor now so moving along all right i think i wired it all right we got contactors all in we're still working on finishing up the condenser fan motors we eliminated the rat's nest of wiring up under here and made it solid wires coming through to individual capacitors this guy right here i shortened this a little bit too eliminated the wire nuts i still have one on the ground but i could go directly into the contactors and then i got rid of the pressure controls mess and then fixed all that so we're basically ready to charge this guy up um we're in decay 415 microns on that one and 444 on that one so evacuations bitchin unfortunately we are going to put 407c and r22 um we're going to use the recovered r22 that we pulled out of that one i wanted to convert it to 407c but with this the weather today i was a little worried about pulling that compressor out i wanted to get everything back together so oh boy all right this unit is running talk about a long day i just got done doing a new p-trap for this guy because of the new drain line and everything so when i do my p-traps i like to have a clean-out with a cap clean out there and a clean out there and then unions sometimes if i don't have a union i'll just do a coupling with some tape but i had everything to get it done so trap is done unit's been running for about a half an hour uh it's about time to evaluate the pressures and see how it's doing let's uh have a look right here i've got it up on the tablet okay see what we got going on so circuit one eight degrees sub coin 18 degrees super heat i'm sorry 18 degrees sub coiling nine degrees super heat that doesn't look bad at all uh outdoor air is 106 degrees right now it's pretty hot um 21 degree temperature split okay let's look at circuit two let's go back it's not looking bad i mean everything's a little it's really not bad actually five degrees superheat i mean this guy first stage i mean it's right there it's within range what are we calling for we're calling for five degrees super heat we're not bad we are not bad at all this whole unit is kicking butt right now so i'm super happy with that we cleaned everything up as much as possible so we're kind of in cleanup mode um we'll uh we'll let it operate a little bit longer again i'm trying to bring their building temperature down because it's it was like 90 degrees in that bar it's ridiculous they had a ton of customers in there so i'm just letting it run all right just opened it up to take all the probes off um we labeled everything really well 407cr22 so even a blind person would know that's our 22. i still got to get some caps on those two guys now i did add liquid line ports and we put a suction line uh dryer with an hh core um everything's looking good so i'm gonna put those caps on put all the panels back on turn it back on and then we're just gonna wrap it up so that's gonna be it on this one um you know i tried to get the customer to replace the unit but we couldn't get a unit right now so they had to do what they had to do right you need air conditioning so kind of crazy polishing a turd right i just did a massive repair on this ac change the compressor and evaporator um blower assembly everything and they call me back the next day and they say it's 81 degrees in the bar the ac is not working so i come out here and this ac is running its heart away what i can hear i believe to be both compressors running it's currently 80 degrees in the bar so it's hot in there right but the entire building's hot so this guy's running this is one of their barry sees this is a 10 ton and this is a six time for the bar they're both cranking they both have great tds this guy sounds rough they're beat down but they're rejecting heat don't see my stuff or anything i come over here this one just turned on right here this thing just turned on and the thermostat was satisfied but it was like 80 degrees in there and then i come over here and this one's satisfied and it's like 80 degrees in that so the whole building's like 80 degrees and this one's satisfied so these should not be satisfied the thermostat for this one right here is reading 68 degrees when it's 80 degrees in there these ones are reading like 70 74. so i don't think it has anything to do with the ac that i fixed this guy's cranking its little heart away 55 degrees supply and again it's 80 degrees in the dining room so this guy's kicking butt 55 degrees and then we come over here now granted there could be other stuff going on with the ac but i'm just doing a preliminary triage you know so this one right here let's see what this guy does so this guy's at 62 degrees supply air and it's like 80 degrees so not the greatest but it's running but i'm still like totally tripping out as to why this one was shut off this one was shut off and that one was shut off and the thermostats are saying it's cold in there when it's nowhere near there now all the thermostats are located in their office and the first thing i thought was maybe the thermostats lost their zone sensors and they were reading the office temperature no because it's like 78 degrees in the office or something so that's not the case i pulled the zone sensor from the back of the thermostat and now it says 35 degrees so that's one of them that's another one look at it says 55 degrees it's not 55 degrees in there these thermostats are going wonky starting to do some weird stuff so these two right here aren't working and this one i think just turned on but this one says 74 it's not 74 in there so what the heck it's not a balance issue either because um even if it was pulling outside air it's 110 degrees outside so it's not pulling outside air through the walls and faking out the thermostats what the heck man these ones are all reading accurate that's not the one i fixed that's the one that i just fixed that's actually kicking butt huh so i still don't know exactly what the problem is but it's it was four o'clock when i first got here and i suspect we're either gonna have bad zone sensors or bad thermostats it's ironic that potentially three of them are bad at the same time but i went and ran to the supply house real quick because they were about to close and i just picked up three thermostats and three zone sensors but i'm not necessarily going to change them all i need to dig into this so while i was gone i jumped out this ac and jumped out this ac and just with those two running this entire building even the bar ec satisfied each one of these satisfied they're all at 70 degrees so i don't know what the heck happened here but we're going to dig into this now so i get in here to investigate this and i'm like looking back behind the thermostat there's a zone sensor and then these ones seem to be going down and then i look what the so the thermostat below it has two zone sensors hooked up to it so someone tried to use and that makes sense because when i disconnect the zone sensor from where i think this one should be this one goes blank so i don't know what's going on here this is a mess all right so i come up into the ac okay um look at what's going on here because sometimes you run zone sensors through the ac and sometimes you can steal wires too so this is our thermostat wire coming up to the ac there's no extra wires in here in fact for whatever reason there's a jumper from y1 to y2 now i don't like that but i don't necessarily want to remove that yet because i don't know what i'm unboxing here now the other thing is i've got this thermostat wire it's just a two wire and it's sitting right here i don't know what that is i they do use like they have like a weird setup here where they they run the smoke detectors up into here but you look right here this looks like it's the smoke detector it's going up here and it's wiring into the indoor blower motor contactor which i don't even understand why people do that you should never disconnect the indoor blower motor contactor you should break r right here but again i'm not trying to uh reinvent the wheel here right now there's a lot of things i want to fix but i need to get to the bottom of this so what i'm going to do is i'm going to strip these and wire net them together and then go downstairs because there was a zone sensor wire behind the thermostat that wasn't being used so we're gonna wire nut these together and see if we have resistance or continuity downstairs all right this guy's not being used so we wire net it just using away go so we're gonna go down and see if we have resistance down at the thermostat or behind the thermostat okay so we've got res uh continuity now let's go take it off and make sure the continuity goes away or the path for whatever goes away i disconnected and it didn't go away so there's something wrong with that that's why it's not being used so now we need to see if we can use so we got an extra black wire here i got to make sure that's up on the roof and what i could do is take the w-2 because we really don't use heating here very often so we can steal the w-2 and that black one if they're available up top so let's go have a look all right yeah that's what we're going to do there's an extra black in here and then we're going to steal the w-2 and then we'll use this connection point and then we'll run a new thermostat wire over and drop it down in the return for the zone sensor and i don't know what the dealio is this with this so we'll just abandon that guy all right um whenever you're doing the thermostat wires don't run them from the other side of the unit run them through like there's chases and everything places to run them so i've got this guy right here i'm gonna leave extra slack so that way in case i ever have to pull out the economizer and we're just going to drop it down in the return now it's not ideal um i tried to get a duck sensor but the supply house didn't have one this will be sufficient um but always use like the chases and stuff so that way the wires don't rub out but yeah like i said this economizer doesn't even work so all right got thermostat ran panels all put back on ran into here got some extra right here spliced the zone sensor wires right there and then rewire this because it always bothers me when people don't use brown as the common i love using brown as the common um and then i like blue is white too and then orange is usually w2 for me i mean it doesn't really make a huge difference but i i think like to say there's like universal colors really doesn't make sense because everybody changes them to what their preferences are but we're going to turn this on go install the thermostat and then verify that it turns both stages on i went ahead and took that jumper off too between y1 and y2 we're going to confirm that everything works right all right thermostat's installed i put it in test mode all stages came on indoor blower motors on this is good um i'm going to stop at this because these ac this one especially that's the one that was tied with the sensor it seems to be working now so i'm going to follow up on that one and then this one i'll follow up on that too because they're both working and temperatures look good at the moment i think this was the main problem and i'm wondering if there was something wrong with the thermostat because it was tied to the other sensor i don't know but regardless we're gonna get off of this one because they're actually asking me to look at their walk-in freezer now so we're gonna wrap this one up for today oh my gosh it has been chaos lately like everything that could go wrong has been going wrong it's just been nuts so we started out this video with a major repair to this ac now uh this unit the the main first part of the video that ac has been down for a year and a half meaning that one compressor was disconnected it was like a year and a half ago okay the second stage and you know they were going through covid they didn't want to fix it then the year after covid they kind of made it through the summer so they were like i don't know and then this summer hits and you know things are kind of getting back to normal they're getting busy and it's just hot in that bar so they finally wanted to get it fixed we tried to get them a new unit but it just wasn't going to happen in the time frame you know it's just super hard to get equipment right now so we went through with the repair okay it's you know sometimes you run into problems you you have your plans and you hope that everything's gonna work out good and you know there was a thunderstorm that day multiple thunderstorms there was lightning thunder rain like everything that night too was insane for southern california like i love lightning and thunder and we had an amazing show but regardless we got the unit back up and running now there's some things that i wanted to do i wasn't a super fan of of you know me fixing the electrical the way that i did like the the rat's nest of wiring of course in a perfect world if i had wire on my truck i think that was six gauge or eight gauge i can't remember what i would have liked to have replaced all the wire extended it all but i did my best i couldn't do it all i just kind of shortened it up a little bit got rid of the wire nuts that were bugging me right in my face uh cleaned up some of the low voltage wiring eliminated the economizer wiring i've said it a million times the customers typically don't want to fix economizers sometimes on the rare occasion i get them to allow me to go ahead and fix them and if i was going to fix this one i would actually just install an entire new economizer assembly i'd put in a jade economizer assembly with you know dampers and everything and i just run thermostat wire to it so that's why i eliminated all the the factory economizer wiring because it's always just a problem low voltage shorts i mean you don't want to take this you know and get blindsided or whatever but i'd say 80 of the time if you have a low voltage short on a carrier package unit it's in the low voltage wiring going to the economizer they're always rubbing out in different places that or the freeze stats rub out so anyways i eliminated all that um you know what was funny too is as i was going through this unit and as i was fixing the low voltage wires i realized that that compressor that was bad the high pressure control was disconnected it wasn't in the picture um so obviously that's probably why the compressor went bad on top of that the fixed orifice metering device had been plugged up on that unit for a very long time so when they when i told them they had a bad compressor they were like yeah just change the compressor and i'm like it's not that easy i'm not doing it unless we're doing an evaporator too because i'm not about to put a brand new compressor spend eight hours you know going through it to find out the metering devices restricted or you know because i knew it was restricted so we sold them on new evaporator with new fixed orifice metering devices um and you know went ahead and rebuilt the blower assembly new drain pan got the unit up and running ideally i would have liked to put 407c in both compressors but it just wasn't practical that day i wanted to pour the oil out convert it over to pve probably you can use polyester oil or pve with 407c the danfoss compressors they tend to want to use pve oil so i was going to switch it over to that but it just wasn't going to work and i was just running out of time so we eliminated um i mean we left the one compressor with r22 it's been running fine and then you know we get to the the next day they call me pissed off you know because their acs aren't working they just spent all this money and it's like wait a minute you know so i'm going out there thinking what did i do wrong good gosh you know and then i get out there and it has nothing to do with my acs oh man so i took over this restaurant probably about four years ago three years ago and i took over like five of these restaurants and it has just been crazy the stuff that i have been finding in these and it's it's weird too that zone sensor problem that i had right they were tying two thermostats together first off i got to applaud the person that did that obviously they probably i'm assuming they got called out on a friday night they had a bad zone sensor and someone had the brain power to jump to the other thermostat and it got them by hey it worked like i get it you know but don't leave it like that don't leave it because look at what can happen later so then they lost two acs right somehow between the two something was happening now we clearly had a bad thermostat so i changed the one thermostat and then ran the new zone sensor up to the roof eliminated the whole jumper wire and put it back together but man have i it's weird that you can you can have a restaurant for a few years and still be finding weird problems from previous people like it's crazy but anyways we got them up and running life is good they are happy um and it's funny too i mentioned right at the tail end of the video they wanted me to work on their walk-in freezer too yeah so that i don't know if i'm gonna i don't know if i made a video on that one i can't remember but that ended up being walk and freezer walking cooler and beer walking went down the entire rack lost a condenser fan motor the condenser was plugged while i was doing it we found a leak on the walk-in cooler the pressure control was dripping oil it wasn't flashing yet so it must have just happened so i got him through the night i cleaned it up changed or replaced a capacitor cleaned the condenser and then i sent another technician out the next day he fixed the the pressure control changed it but good gosh have we been getting these crazy service calls lately but hey i'm thankful that i got the work it's just a little bit stressful right now you know tensions are high because it's hot uh it's been about a week week and a half since i did this repair that you guys just watched and the temperature just keeps going up and up i was working on a roof today it was 115 on the roof and that's not even the full heat yet we'll hit 120 on the roof sometimes 125 even though ambient air outside maybe 120 sometimes it's 5 to 10 degrees hotter on a roof especially when they have like rubber membrane roofs the white pto roofs or even the asphalt shingle roofs the tar paper stuff like that that the heat just radiates off that so you know five to ten degrees hotter on the roof it can get pretty crazy so welcome to southern california summers right um i really appreciate you guys making it to the end of the video as usual it's amazing the humble i'm so humbled by all the support from all of you if you guys haven't already please consider checking out my website hvacrvideos.com we have merchandise available we have hats we've been selling these things like crazy i spent a lot of time in you know coming up with the design on these hats i went through a lot of samples some of the things i'm really proud of is the black underbill on the hat so that way when you're working your fingers don't get it dirty and then also i've said it a million times too if you hold this hat up to the light you can actually see through it but it's hard to tell it's not like a trucker hat it's not a mesh hat it's it's i don't know it's really hard to explain but it's a really it's like a dry fit whatever hat but it's a flex fit really nice and i purposely made it without hvacr videos on it because i didn't want to conflict with anybody's uniforms right so um i just says hvacr with my color scheme on it and then that way i potentially am not conflicting with people's uniform policies and it seems to be working out well because a lot of people have been buying them from multiple people at their company so that's really cool so thank you if you've already done that i really appreciate it if if not if you're interested check out the website we have shirts sweaters beanies soon to be stickers i keep saying that but one of these days i'll get the stickers loaded up i have uh two different styles they're not on there yet but you have a white background so you can see it's white and then we also have a see-through background that'll be coming soon so you have the translucent one right here that you can actually see through so those will be coming soon it's just a matter of i've been super busy and haven't had time to load them on the website but i have a big old stack of each one of those so stay tuned i really really appreciate you guys other ways to help support the channel if you're interested in doing so check out truetechtools.com if you like their pricing you can use my offer code big picture one word you'll get an eight percent discount on checkout i get a small commission from that you get an eight percent discount i really do like uh truetek tools they have great quality great customer service great company really cool people to work with so check it out you can also support the channel via patreon paypal youtube channel memberships there's links in the show notes of the video to figure all that stuff out again thank you so very much remember to be kind to one another and we will catch you on the next one okay.

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