 What's up? Merry Christmas people. I just wanted to thank everyone out there that's been watching me over the years and even my new Subscribers thanks to every one of you guys for building the channel up to where it's at if it wasn't for you guys watching the videos I'd have absolutely no reason whatsoever to make these videos. This is a video. I put together it's something I shot back in October and It's over TXV and a water source heat pump, but don't flip off yet because it's water source heat pump It's the same thing as a regular heat pump. The principles are all the same The only difference is the condenser is water instead of air-cooled. Here we go. Today. We are coming back to change some parts We had a capacitor bad. We had a TXV That was actually bad, which I probably should record it since it's always the TXV and so We are pumping it down right now. We're working on geothermal What we have here is furnace down here in the basement and we have two geothermal So we got an air handler up in the attic What we had was a pastor. It was about four ferrats lower than one's rated for it's rated for 40 I think we said 38 we're getting that changed out. We just pumped the system down We had to obviously energize the reversing valve to run it in tooling mode Balbed off the liquid pumped it down just like a regular air conditioner. Nothing special there. We got this done We're just gonna go upstairs and change out the TXV They have something called sulfur water Sulfur water is something you have when you got well water. You can see right here. That's what the copper looks like Underneath there. There's the copper. See the black crud that black crud is The gases that are in the air from the well water and it attacks the solder joints You can see it Over here really good It's really bad stuff It can Completely just eat up refrigerant connections and stuff like that So that's that's what sulfur water is. I changed that dryer out shortly after starting here about a year I don't even really really remember doing it But that's what we're doing today. It's just a short preview But some of the things we're doing today went ahead and got the new capacitor in there got a wire tie back in They used a stainless steel wrap before I got a nice round one. It's it's not going nowhere got the high voltage off This is controlled by the low voltage up in the unit the way we diagnosed this TXV And you've got two TXVs in a geothermal or a heat pump. Well, this one here We've got one on the inside this one's used when it's running in the Heating mode the one up on the air handlers used during the cooling mode So we ran this thing in the cooling mode and I had a 28 degree evaporator temperature There was no reason for it to be that low I added a little bit of refrigerant to it after checking sub cooling and stuff It made no difference sub cooling came up from four up to I think nine and It did not change. It was still running 28 degree evaporator temperature I had proper airflow all the registers were open and we had heat loads So we've eliminated all the problems that would cause a low evaporator temperature, which is air flow at that point It's a restriction, which is your TXV or your thermal expansion valve. However, you want to call it We're running in the cooling mode. Then we run it in heat mode and heat mode does fine Well in heating mode that TXV up on the top is bypassed It comes down to here and then it's metered through this one Then that as it goes through the condenser now upstairs It comes through the air meters it goes through the coax coil Which now is your evaporator and then recirculates back into the compressor and goes all over again Usually just trial and elimination generally it's either low on charge Or it's a bad thermal expansion valve unless some catastrophics changed if it was a properly designed system like this one was There's no reason for airflow issues all the registers were open all that sort of thing Now the original initial call for being out here was because his electric bill our shouldn't say his electric bill He noticed it going into auxiliary heat, which this has electric strips with backup This is electric air handler, which we're gonna see here in a minute Well, we're just two months into or maybe a month into the heat coming on some people ain't even turn their heat on yet We're right now in October into October his electric bill wouldn't be high I was told high bills, but then again they weren't here So I had to get secondhand knowledge from the person that let me in so it's just kind of questionable as whether It's getting good knowledge Which comes down to question your person that's calling in and getting good story about what their complaint is so that you Properly address it and this is one of those instances where if they're not here They can make it rather difficult if it's not a blatant obvious things like I said, we found the TXV running low Saturation temperature. We knew that wasn't right. So that's what we're here today to do is to change that So let's go up there and do that real quick and I'll show you what we got going on I would come over here to the air handlers up here in the attic You can see the line set comes down through here Because under the insulation goes over in that dark and back corner wall goes straight down to the basement I actually think it might go right here goes straight down. Yeah, there's the gas line going all the way down to the basement this is a Two-story house. It's fairly Larger house as you can tell it's got a lot of room in here He didn't mention to me that he removed the trap because it had broke and was leaking So that needs replaced the filter drives getting changed And our coils in there. I put a new aluminum coil in it in 2017 And it's being somewhat resistant. You can see that Water so for gas and the air is even affecting stuff up here in the attic, which is pretty potent stuff now they got water treatment system that Treats it so you can't taste it or anything like that, but the effects are still there You can see the TXVs kind of aid up pretty good there Unfortunately, they didn't give you I don't think that coupling piece that goes from the aluminum To the valve because he's the flare valve, which is kind of a poor choice The copper goes into that piece there. It's all corroded and ratty looking and you can see the aluminum is not even doing all that good It usually won't be affected by this Gassets in the air, but it's doing a number on you can tell it's kind of white and chalky looking. It's not good filter dryer We're gonna swap that out like I said, but It's one of them days what I end up doing is using my Leatherman there with my little Sawzall blade it's in there That thing made short work of it So got right in there and cut that plastic that's not needed because it's for a horizontal application that we're not doing went ahead and chopped the 3-8 line with my linemen's Tube and the bulb tube when I clip the bulb tube I did get pressure coming out of it So I know that that bulb was still good So chances are we got something gummed up inside the valve itself We can pop it apart and take a look inside and see if the piston rod is gummed up full of crud the fitting here Seems like it turns halfway decent. I'm gonna probably get my wire brush wheel on there And get it on there clean that up and then we'll unbrace it and we'll get that thing clamped back down You can see that aluminum there just does not look very good at all. That looks Doesn't look so good. All right, so we ended up putting a little Coupling piece in her a little longer so we make up and just cut off the other piece And then I ended up losing the one that went here and had to break make it anyway So I wouldn't have had to do on that Went ahead and painted the copper in there gray just to help give it some extra protection Got had end up making my own 90 there my own 90 here But and then sprayed the bulb and stuff that crap just tends to eat anything the paint will slow it down So I'm it's not gonna stop it I've had everything from cold galvanized sprays that carrier blue crap that peels off to all the stuff Just tends to fall off So while that's drying I'm gonna go down there and pull vacuum on this thing and get her running again That's what we had to do. Just Undid the bulb there by past tube you see it right down there just undid it They had a little stub, and I just didn't want to take a chance of it leaking on the other stub piece Got it in there and good to go like I said all that crap has changed just in 17 We've got it going We have it running Go ahead and back light it We're on about a five degree sub cooling so far Our evap temperatures run in 39. So that's a huge improvement over 28 Super heats a little low But it just came on it's only been running for probably two minutes or so The bulb I didn't insulate it because it wasn't generally a lot of times They don't insulate it in this particular model, but we may have to insulate it just in case It may not be sensing the temperature. So it's Flooding it right now. It's not horrible, but I have a feeling it's gonna come back It just came on we're starting this off in cooling mode that way if there's anything that may have broke loose It's gonna be driven into the filter dryer first. That's generally what most of the manufacturers of Especially in the geothermal world recommend is starting off in cooling mode I did say earlier about one T or two TXVs in them now a lot of the geothermals that are one-piece unit We'll have one TXV and they're bi-directional flow TXV whereas these ones here just a Traditional TXV with a check valve and it bypasses One direction and runs metering in the other This is what we got so far. We're gonna let this run for a little bit the book if I remember correctly And for the temperatures we had at 10 degrees subcooling, I think yesterday and We're running cooling mode and our temperatures was somewhere around 60 degrees and we're at 50 right on our chart depending on which one you go with Subcooling to be somewhere between 9 and 12 Gallons per minute that we're running we're running the higher three gallons per minute which on this one of the few that actually made it pretty easy to understand and Your pressure drop which is right here Go over your tonnage and that would tell you your gallons per minute That's total gallons per minute down here's gallons per minute per ton. What they're showing here So we had about a five PSI Delta P is it all? Running right at about 60 degrees so we're between the two of them close enough nine So three six nine three gallons per ton Coming down here. So you got three two and one. I did another video on this link that right above right now It's on geothermals. How I check the charge same thing here but This is nothing more than a water-cooled condenser and an air-cooled evaporator and The cooling mode and then in the heating mode. Let's say a water-cooled evaporator and an air-cooled Condenser so it just depends on which mode we're in You get the point Right there. Let's go ahead see if we can wrap a little bit of a foam tape around it see if it makes a difference All right, so it didn't make much of a difference. So I went ahead and threw it in heat mode We're on the two lines that are traditional suction and liquid But in heat mode that suction line now is your hot gas line your liquid line stays your liquid line Which is your three eighths line now. We're measuring the pressure across our TXV It's going in a 226 coming back at 217 So we have about a 10 degree or a 10 psi drop across our TXV This is another way I kind of judge whether a TXV is acting up on the inside when you're working on a heat pump I just basically judge it off of what our drop is you're always going to have a drop But it's not going to be extreme you start getting something like 30 40 something like that You know your way off the charts Generally, you'll have something like you're seeing here Maybe 10 maybe 15 just kind of depends on the line size length and all those sort of things Don't know if there's really any charts out there that really gives you exact numbers But even like right now, we're barely at 10 So I wanted to run that TXV and the other direction just to kind of get it warmed up and then have it resettle again Did get two wraps of insulation around it, which is very tight where it was at Let's see if that makes a difference all I did to get this done Let's just yank the O-Terminal which a lot of times I'll just run it in cooling mode and put it back together So it's good stick it back in underneath. Oh And we'll watch you do it tonight. All right now. It's acting a little bit better Get some cooling up a little bit super heat stabilizing out too. So we're good to go