Anyone else do their own HVAC and refrigeration work? Working on this 1960's Westinghouse dehumidifier right now. Changed oil, switched to r12a, added a filter/drier, but seems that the capillary tube is partially blocked. Head pressure soars and thermal overload trips. Once that is replaced should be good for another 60 years of service.
shit man just cut the end of the cap tube off where it runs from the filter drier about 1/2 inch. Just score it with a file and snap it then braze that it back in.
>>2747848where do you buy the refrigerant at? i can only find sketchy people on ebay selling it.
>>2748754get an epa 608, it's an easy test. Or find an hvac buddy. Supply houses usually administer the test.
>>2748728Was gonna do that but thought the compressor was getting too hot for it to be head pressure, so hit the books to see what might be going on in the motor. Turns out start windings were not shutting off, reason was start relay not working because it was on its side. Vertically it works perfectly. Pressures are within tolerance.>>2748754Usually sketchy people on Ebay lol. Most common refrigerants have propane and butane blends that are drop in, like the r-12a I used. They're flammable of course but require no EPA 608, and are more efficient. We should have just always used them from the start and we never would have had a hole in the ozone layer.
>>2748754test
>>2748754holy shit I can postget your 608 or the fines are ABSURD there is an app called skillcat that can walk you through it but they started charging for it there is a free trial
All buttoned up, she's a beauty
Added some adhesive felt to make a sealing surface, and some magnetic clips with some rubber bungee bands to make a filter holder. 12x12 isn't exactly available at the hardware store so have to order them. And no I will not be learning how to post images in the correct orientation.
This book really helped me learn about old motors and motor controls. Its a great resource for anyone working on older stuff. My next project is going to be 50's or 60's fridge whenever the craigslist gods decide to bless me with one in my area.
>>2747848bumping for interest. all i've done is some car work so far but i've got a broken fridge to pull apart so i can learn more
>>2749360>We should have just always used them from the start and we never would have had a hole in the ozone layerbut then how would the mayor reach up in the sky for the hoezone layer?
>>2749778Car work pays for the gear in one job easy and it's convenient for owners to take longer troubleshooting than a flat rate tech has time for. BTW if you don't feel like buying a nitrogen cylinder you can safely purge with welding argon or MIG shielding gas mix. Vacuum is a much less reliable leak detector than pressure and UV dye. Also handy if nit runs out on a weekend but I collect used industrial gas cylinders so not a problem.HVAC nitrogen regulators also use a CGA-580 nut/nipple so they screws right on. The Compressed Gas Association put due thought into their fitting interchange.
>>2749778Tearing down junk anything is educational. I do that with all sorts of tech prior to scrapping.
>>2749778That's how I got started, tired of having no AC in my old beater. Then with all the tools I started repairing and recharging window ACs for resale, then eventually being able to work on just about anything.
>>2747848Nice job taking the initiative op, I've been saying for years that diy HVAC is valid.Techs will soerg out and spam lies, and stores will even refuse to sell to you just to keep the racket going, but sunny fall for their shit.You can use propane, preferably refrigerant grade r290 in place of r12,Propane is often used in commercial equipment, and if you have a natural gas line or propane for heati g in your house, I don't wanna hear shit about "muh fire hazard"They are using butane in mini fridges for residential, so take your fear mongering and shove itYou can use canned air duster r152a in place of r134a in cars
>>2751426How bad is the charging for a system with r-152a instead of r-134a for cars
>>2751452Not sure, canned air duster typically has other stuff in it so I'm sure it's not great for it, but how much longer was the AC in your 1993 shitbox going to last anyway?I was quoted $100 for a used compressor.Canned air duster makes it blow colder btw.
>>2751452>>2751456You can probably just buy r152a by itself, but people typically get a cantap for $3 and a few cases of canned duster. Might want to explain to the clerk you're doing an ac job and not getting high.I'd seek out a supplier of refrigerant grade 152 if you actually do this.
>>2748754Propane isle
>>2751426>They are using butane in mini fridges for residential, so take your fear mongering and shove itThose are designed in a different way than old R12 and R134 fridges.THey don't have exposed sparky relay contacts, and charge is limited to like 100 grams? or smth like that.
>>2751481My point was more along the lines of leaks turning it into a miniature flamethrower..Thanks for your input, I'll add a sparker inline to a butane detector to fix this issue. When this fridge goes, everything else is going with it!
>>2751483This is good for anyone in the trade because when you blow up your refrigerator after dumping propane from Ace hardware in the lineset the EPA will come down with even harsher regulatory enforcement
>>2751486Epa has no authority over my fuel grade propane!
>>2751486m8, do u have ur r290 loisense? >>2751483heheheheh, but seriously, seal up/move all relay contacts.
>>2751493That's good advice but the fridge was designed for butane r600a
Bumping for diy hvac
>>2749862>UV dyeIt's a good leak detector, but it's terrible for the system components and oil. Enjoy clogged orifices if you use that shit.>inb4 I never had a problem
>>2754263>Page 9 in 1 day>On diySomeone doesn't want this thread up
>>2755257HVACRIDF
>>2755267Wtf are you trying to say
Do Americans really just buy r134a and r152a in cans in stores? I had to pay out of my ass for a 12kg r134a cylinder from someone that was willing to sell to someone without license, and all the air duster is shitty butane/propane mix in the wrong ratio for refrigerant replacement
is this a good set for a homeowner?
>>2755289yes. I have repaired my fridge countless times by tapping new threads on the condenser.
>>2755297some fixtures I want are not cut very nice.
>>2755288Yes, but it's always in small cans so you just buy several.The r152 canned duster has crap in time that stinks because idiots get high on it and if you buy a lot they will think you're getting high and probably report you to the police
>>2755352>>2755297>>2755289Idk who many different people this is or who's whoThat looks like gear wrench and appears to be saw and metric.Idk what it wasn't to do with this, but i imaging HVAC would be in not - nation pipe threadWith that being said, the tap wrench holder thing is in their proprietary shape and is nonstandard
>>2755289
>>2748728I have a compressed air dryer that the motor seems to be locked up on. Its maybe two years old so Im sus. Start cap was blown and it still ran, replaced start/run caps no go.Plan is to hook up gauges and make sure its not a super high head pressure locking it up. Then purchase a recovery machine (thermaflo 4000 light any good?) and tank. Pull the compressor, replace and recharge. Am I in the ballpark?
I don't know how this guy hasn't blown himself up yet, but he has quite an impressive list of videos of him trying to produce liquid nitrogen. https://m.youtube.com/@HyperspacePirate/videos
>>2758034Some of ThermoFisher’s cascade systems aren’t really that much more complicated than what this guy is doing
>>2755288what are you using 12kg on? in aus we can buy r134a as picrel
>>2749360What ever happened to the hole they don't talk about it anymore almost like it was a lie and never existed
>>2747848I alwaysbjust wanted a normal life and a house
i've got this mini fridge i want to steal a compressor out of, but i don't know what to do about the refrigerant.i have a vacuum pump but i don't have a manifold, nor do i have anywhere to put refrigerant.i thought about just using some sidecutters and putting a hole in one of the copper lines, and just venting it to the atmosphere, but that feels unethical. but, people just throw these fridges away. and, in a dump, eventually it's going to break down and vent the refrigerant into the atmosphere.so, i don't know.
>>2759642Smallest I could buy was 12kg. Air duster used to be pure r134a until around 2014 but that was before I had a car. Glad I did buy it because prices have almost tripled since.
>>2760193if its got propane or one of the other "new" hydrocarbon refrigerants your supposed to vent it anyway, and if its any other just blow it anyway its all going to end up in the atmosphere anyway one hose would probably hold half the charge.
Hey all you technicians out thereWhat's the best way to get into an HVAC position? I'm working on my EPA 608 universal on skillcat, and I'm familiar with cooling systems, still working on understanding gas furnaces. What else should I be doing?
>>2761868Just nip the tube and hold a lighter in front of it. Trust me it'll be fine.
>>2761868yep get it in a well ventilated space like outside and cut the tube that's capt or pinched off on the compressor
>>2760193Just cut the damn lines. No one is going to find out.
Good thread.
>>2747848hvac shit seems expensive as fuck, can i get away with repairing my fridge with mapp torch?>300 for gauges>200 for probes>30 dollars for valves>100+ for 1 tank, you need 3>cost of filling them>50+ for gauges for these tanks.
>>2747848Someones probably already asked, but any safe, cheap method of getting refrigerant out of ac compressors? Trying to get some scrap copper for metal casting, and have one hooked up to a radiator from an old dehumidifier.Don't want to just put a hole in it and waste it, and probably give myself lung cancer.
>>2764051I've got an okay set of gauges I spent 50 on, a 100 dollar vacuum pump, a torch and staybrite 8, and I just buy whatever refrigerant and consumables I need for the job. What the fuck do you want so many tanks for?>>2764635Mother nature yearns for the refrigerant
>>2765296How do I give her what she needs? Is there some sort of tap to safely release the refrigerant from the line?
>>2765446just take it outdoors and drill, saw, or twist a line
>>2765296what about a micron gauge?
>>2764051find the right bottles and burner, dunno what you got avilable around but here its blue and these yellow ones, and the yellow ones burn more than hot enough to braze pipes up to 7/8" od.they will however suck for even 1/4" compressor connections since the steel casing of it suck away so much heat.t. fridge doing 150bar co2 pipes with just pic related. oxy/acetylen is overrated and cumbersome for just layin pipe.
>>2766475For my purposes, I just vacuum longer than I know I need to, and test that it holds with my gauges. If you plan to do residential systems you might want one.
>>2747848what df is inverter tech in new fridges? is just a scam like those car that turn off the engine on read light to save on gas? Is it just a computer turning off a regular compressor more frequently than electromagnetically switches?
>>2767765variable compressor speed instead of on/off regulation. works really well but obviously you guys will hate it because its "new" tech.
I live in an absolute piece of shit trailer and my evalotat coils need cleaned. I was quoted $1300 to pull this out and spray it off. Why? Is it possible for me to just do it myself?
>>2768019And these are the prices I was given.
>>2766499MAPP gas
>>2768019Trailers are down draft meaning the dirt should mostly be accumulated on the top part of the evaporator. Use a vacuum with a soft brush hose attachment to clean the fins while avoiding damaging them. Then, use an evaporator cleaner spray, they come in aerosol cans. Some advertise no rinse but rinse well with water to flush dirt out. Monitor that the drip pan is working well so you don't cause more water damage to your trailer (its a trailer so I'm assuming you already have that problem)
>>2747848What 12Volt pump (not compressor) can I use with Butane (R600)?Butane (not Isobutane) is piss easy to compress and I want to make a miniature refrigerate AC system using a pump instead of a compressor because I'm too stingy on space to include an Accumulator to eliminate liquid entering the compressor.
>>2768735I know those types of china pumps. I got a 5v version so I can bleed my brakes with a usb power bank instead of dealing with a cord and a vacuum pump or using a hand pump like a caveman. Doubt they are completely airtight so might have to add more butane every month or so.Also link to video? Now I want to try it myself
>>2768743Butane is flammable, even explosive if mixed with air...I won't be using the cheap plastic stuff..I want something to sit in a shaded space outside my bedroom feeding super-chilled air thru the window vent..I'm sofar more into the oil pump or high pressure petrol pump..If I remember correctly, a centrifugal pump should also work very well..oil and petrol pumps are rated to not leak to a higher compliance rating than water pumps, nor do the impellors erode with hydrocarbons.https://www.youtube.com/watch?v=6pjQE_YLECEhttps://www.youtube.com/watch?v=_OoywWyj2nYhttps://www.youtube.com/watch?v=i0TgmeAVGI4https://www.youtube.com/watch?v=xVpCYLXIVeghttps://www.youtube.com/watch?v=_PqdPppKSEEhttps://www.youtube.com/watch?v=26uq_qHKRjUhttps://www.youtube.com/watch?v=OoEd_ciy0F8
How do you guys get started on learning how to do this stuff? I figure it's probably been talked about before, but are there a few tutorials or books someone should start with? Sources like >>2749676 seems useful, but I'm not sure how easy it'd be to get access to older refrigerator hardware.
Pulling a vacuum on my cars AC and I can see the oil still outgassing through the sight glas after a few hours. Do I leave the vacuum pump on longer?>>2768766Watch videos, buy some tools, watch more videos and then do repairs on your shitbox / junk AC units ect.
>>2747848Lets talk about supco type bullet piercing valves vs a braze on piercing valve. why would you braze? they both lack schrader valves.
>>2769165>Watch videosWho do you recommend? Who should be avoided?>toolsAny good ones to start with?>then do repairs on your shitbox / junk AC units ect.What are some common shitboxes out there?
>>2769165Nevermind I fixed it by purging the system with propane from high to low and then vacuuming again. >>2769533Ok ill bitehttps://www.youtube.com/watch?v=3dHbMDyADTohttps://youtu.be/N_msH6TX2W4https://www.youtube.com/watch?v=M6Bvamn5Kicsomething like thatGauges, hoses, vacuum pump and cheapest vevor recovery machine from aliexpress or build your own recovery machine from a fridge compressor. Recovery cylinder can be used. Postal scale works fine to weight. Thats what I done. It pays itself back with a few uses because mechanics are big ripoffs.
>>2769280I like Supco piercing valves, have one installed in a window AC for about 5 years I use as a service port. If it starts to leak I will solder the hole and put a new one in the same area.
>>2769533This channel is pretty good. Very autistically purist though. https://www.youtube.com/@coldfinger459sub0
>>2769541>>2769626This is really helpful. Thanks for putting up with my questions. kek
>>2768747>https://www.youtube.com/watch?v=26uq_qHKRjUI need to try this with a old beer cooler. The peltier ones are too inefficient and cant freeze.
>>2769717Videos are of dangerous temporary disposable designs...They will deteriorate and leak ..Your joins will need additional Welders AB Casting glue...Placing a fine wire grating around all air in/out paths will make it a Davis Lantern, thus much safer.Using pure Butane without propane will really improve compression, therefore cooling...Keep an air-quality monitor always near it for safety.Your pump will be the biggest issue...Anyone with expert insight on pump selection is welcome.
>>2748754Ausfag here. Is it over?
>>2769717Gonna be difficult finding a pump that won't leak refrigerant
>>2772423>>2769899I doubt those pumps can get the pressure high enough to condense butane at room temps in the first place
>>2772425>look at my 6Volt toy.....Probably why they used a 9Volt battery, instead.. then allow the capillary and evaporator to chill it down to keep the heightened performance for a short time...They must have ended the video just before it either burnt out or was eaten away until it leaked and ignited...Do not use pissy plastic 6Volt water pumps..They do not mix well with hydrocarbons..It takes less than 36psi (250kPa) to compress n-Butane at Room temperature..It takes less than 45psi (310kPa) to compress n-Butane at a searing 45°C heatwave day...Plenty of small 12Volt hydrocarbon friendly >50psi oil and petrol pumps around...
>>2749381>fines are ABSURDShare one instance where a DIYer working on personal systems got fined.>not a company with unlicensed techs>not someone who decided to charge for his service without a license>not someone trying to smuggle refrigerant from Mexico
>>2772815fuel pumps pump liquid not gasses.
>>2768735>>2772425>>2772815May I suggest
>>2749360Dammit Bobby, DuPont cant patent propane.
Does anyone know of a r410 compressor with an oil sump?Belt drive or hermetically sealed. I've been looking at the york 210, overlanders like them for compressing air. I want to compress natural gas though and at higher pressures. I've read that 600 psi is normal for r410. I just need something with an oil sump like the york 210, thats why it can be used as an air compressor.
>>2773182>Not as efficient, no..Pumps: Primarily designed for handling liquids (water/gasoline/oil). Increase the pressure of the liquid to move it from one place to another (tank to a pipe).Compressors: Specifically designed for gases. Increase the pressure of gases by reducing their volume (refrigeration, HVAC).>BOTH groups have their exceptions...Compressors: Not all use linear motion (pistons/bellows/diaphragm).Some use a rotation method to force gas into an ever smaller volume (rotary-vane/scroll/centrifugal).Pumps: not all use pissy gay rotational impellors that look like swinging dicks on sticks...Hi-performance hi-pressure hi-RPM petrol pumps reduce the volume of space occupied by the fluid as it travels from inlet to outlet; it compresses the fluid into the motor.. https://www.youtube.com/watch?v=NGyfHHk_VAw&t=156sHi-quality Hi-pressure petrol pumps have a larger motor for higher RPM + higher torque... +less spacing between impellor & chamber walls; much less backflow leakage allowing it to act more like a positive displacement pump (moving set volume packets).There is leakage, but less than the positive displacement..As long as the pump has enough motor-torque to keep rotating against the reverse pressure build up at the outlet; it will continue to positive-displacement additional packets of volume from the inlet to the outlet...This is only possible on high-quality petrol pumps, not leaky, low RPM, low psi, cheap chink shit (>>2773268).Finding a way to use a liquid-pump instead of a gas-compressor means you can save a lot of money + space.. getting away with using a "poorly tuned" capillary-tube instead of a thermal-expansion-valve, and not requiring an Accumulator to stop the compressor from shitting itself silly when liquid refrigerant enters its inlet on really heavy loads. The entire system has simplified down to requiring practically nothing.
>>2769717>can/stubbie coolerhttps://www.alibaba.com/product-detail/Micromini-ST19W-Laser-Beauty-Instrument-Circulating_1600367622417.html?spm=a2700.details.popular_products.8.d8d3289dUKA3Lshttps://www.alibaba.com/product-detail/BD35W-Tiny-Water-Chiller-DC-12V_1600733274730.html?spm=a2700.details.popular_products.2.33a57f66e3M8hj
I wonder if you could use ethanol as refrigerant with this >>2772425Ethanol condenses at room temps, and boils under vacuum. There would be barely any pressure to contain inside a system.
>>2774611wew 4 degrees of cooling. https://streamable.com/j6cc70
>>2758031So despite the lack of assistance I recovered the charge, popped the compressor and the reed valve had broken and wedged in the piston. Embarco replacement, Stay Brite soldered, purged and pressure tested with argon, loaner vacuum and refilled. Topped up with a can from autozone and we're golden. Refrigeration compressor was basically the last thing I couldnt repair in the realm of fixing things so Im stoked.
>>2774611lol no
>>2774650>https://streamable.com/j6cc70Is the fan blown tubing your condenser?Is the black tubing your metering device?Is the clothed tubing your evaporator?Why is the accumulator inlet higher than the evaporator?Your gas phase flow is blocked by pooled liquid.
>>2774916Wow nice work
>>2774992Its my vacuum brake bleeder. I used a needle with a thin wire in it for metering. The high side gets enough pressure to where it pops when hose is removed but almost nothing is condensed. Barely a drop
>>2775017gas phase stage circulation flow looks blocked by pooled liquid in the evaporator..The compressor has nothing to compress into the condenser.ALL liquid pooling is supposed to be pooled in the Accumulator so gas phase stage flow isn't restricted.
>>2775224Ill fiddle with it some more. I dont think the vacuum is low enough for boiling ethanol.
>>2747848Tl, dr; I need help mitigating resonance of an external unit installed outside my bedroom. I need to know what to do myself or at least to know how to solve it to tell the technician that installed to do it. I have this cheap 12kBTU dual-inverter LG unit on a small 170 square feet bedroom for the last 4 years. There's no problems with the refrigeration, but I have to do a reinstallation with polyurethane brackets because the steel ones rusted off and were almost failing (the tubes were in contact with it throughout the years). Now, the external unit is resonating with the wall, loudly enough to nag me during the day and wake me up while I'm sleepling. It's installed on a wall made with those clay bricks, covered with a sheet of concrete. What should be done to mitigate it?I'm from Brazil, so maintenance is expensive and when not it's riddled with scoundrels. The original technician is wandering the countryside doing maintenance jobs and will not be around for at least 2 weeks, and doesn't sound very interested in stop what he's doing to provide me warranty. I already called a second technician to inspect it (from the warranty company, this time), and while he told me there was nothing wrong with the install and the resonance might be because of limitations of the plastic bracket, he also told me the ressonance can be solved and refused to disclosed me how; he asked me to request an reinstall with his company, which is so expensive it's worth a third of a new equipment, and I'll not spend this kind of money reinstalling an used equipment. I need to do something to solve it, because buying a new one and asking for the warranty company to do a good install on it is not exacly on the foreseeable future. I need to do something, or at least have a proper argument to tell the original technician it's his responsibility to solve it if I can't solve it myself. Thanks
>>2775889Remove Bracket bolts from unit, cut pieces of rubber from a tire the size of the contact patch between unit and bracket, drill holes for mounting hardware to pass through, install rubber between unit and bracket. From the same tire, cut small rubber washers to place between nut on mounting hardware and bracket. Rubber between wall and bracket should also help if the bracket slides into the unit instead of bolting.
>>2776277I like this. I can probably do it myself, but I'd rather argue it with the technician for him to do it when he shows up. I inspected the washers myself and there was washers of some rubbery kind of material on it which can clearly withstand vibration, but apparently it isn't enough for this old unit. Considering that I'm willing to not do a "gambiarra" (portuguese-brazilian word for highly precarious improvisation that actually works somehow), and for my own education, what kind of material should I get proper washers to reinforce the dampening? Also, would fill the gaps between the bracket and the machine with something help to damp most of the machine's vibration volume?Thanks again
>>2776417Sorbothane Vibration Isolation Washers are the off the shelf item for this application. Its not surprising that there were some used for the original install. If the original washers are in good shape just reuse those, I think the rubber between the bracket and the unit or house will add enough dampening for your purposes.
>>2776845It should, though. I got from third party inspection there's nothing wrong with the instalation, and the obvious increment is doing proper resonance dampening.
Best way to clean evaporator core in car? I can see it when I pull the blower motor. It looks gross but it still moves lots of air.
>>2777166Use a foaming no rinse evaporator coil cleaner
Is mineral oil for AC the same mineral oil in baby oil?
>>2780130Yes. But Its refined and may have additives. Before anybody does anything stupid, you can find the real stuff cheap on Ebay.
>purchase pic related>have AC guy install>Unit trips the breaker when the compressor turns on>Have electrician run dedicated lineNow the unit's compressor doesn't run and only blows air. How do I troubleshoot? Any idea why this could be? Fan spins inside and outside.
>>27803392/3 I took a picture of power and communication cables ran to the outside unit.
>>27803443/3 Per the diagram above, the black and white cables are swapped here. However, these are from "power supply" is this +/-? Should I try swapping them?
>>2780344In that diagram, the power supply wires coming to the outdoor unit are "weird"... They have white going to L/line and black going to N/neutral.... That's the opposite of how it's done in the USA. That's why the electrician put black to L and white to N.This kind of stuff is one of the problems that I ran into with cheap minisplits-- the manufacturers often had diagrams that didn't make sense and you had to use judgement when installing them. That said, I have no idea if swapping will help your current situation. >>2780345>is this +/-?It's 120v AC; It's not +/-. Having the hot and neutral reversed shouldn't (AFAIK) have any effect on how the device operates with the exception of how the unit behaves during certain fault conditions.
>>2780357Thanks, I swapped the wires and nothing has changed. The unit blows warm air. The AC guy who installed is going to return this week to inspect. Not sure what else to do. Very frustrated. Going to make sure I am "registered" with Pioneer for warranty purposes. I do distinctly remember the sound of the compressor kicking on before tripping the breaker. Curious why it isnt working now with proper power. Would running 15amps on a 17amp unit damage the circuitry?
>>2780365>I do distinctly remember the sound of the compressor kicking on before tripping the breaker. Curious why it isnt working now with proper power. Would running 15amps on a 17amp unit damage the circuitry?If the unit operates at 17A, then its not a surprise that it tripped the breaker if it was on a 15A circuit. That "shouldn't" damage the unit though.
>>2780365I'd put it back the way the guy left it just so you don't hear any batching from him
>>2775614Rig a gravity feed valve inlet to an Ethanol resevor over the accumulator and lower the Accumulator's location to below the rest of the circuit so it behaves as the accumulator....THEN... vacuum the rest of it... then lightly open the valve to drip ethanol into the Accummulator which should instantly boil.Switch on your compressor..The very low psi range offered by your compressor will make it difficult to add just enough Ethanol so its vapor at the Accumulator but able to compress it to above condensation after the compressor..
>>2780339>have AC guy install>Have electrician runyep. /diy/ in a nutshell
>>2780307Just soaking the O rings in the oil before using them. Thats all.
>>2768045MAPP gas doesn't exist anymore. The only chemical plant still making it closed in 2008. The shit they sell nowadays called MAPP gas is just the same propane in a yellow bottle with a bit of propylene mixed in. Its a waste of money and is within margin of error of achieving temps propane does.
>have an honest to god boomer posting ITT who like most of his ilk for some reason can't.... make internet posts without.... elipses everywhere.....still no idea...why that's a......thing specifically with boomers on the.....internet
>>2781510take your meds
>>2781510you're welcome to come back to this thread after you figure out what gender you are, kid
>>2781510>...>>2781525>>2781526Actually... it is kinda funny...
>>2781527lol I missed all the .. that weirdo did it on every fucking line and once in the middle of a sentence. Talk about needing to take meds.
>>2781527>>2781529samefag on suicide watch
>>2781535Did you miss the part in the second post where I referred to the other post with "I" you blithering idiot. Find someone under the age of 65 to explain what samefag means.And "suicide watch"? Goddamn get your memes straight old man. Or go back to Facebook where you might fit in. Sigh.
>>2781543You need to take your OCD meds.
>>2781543>>2781547Quit sniffing the refrigerants
>>2747848Laymen shouldn't be messing around with that stuff and should hire a licensed and trained HVAC technician
>>2781525>>2781547Take meds for what? So my eyes don't fucking work anymore?
>>2781510It's from Star Trek... They're trying to... sound like... Captain Kirk...
>>2781637Take your OCD meds, then turn around clockwise seven times while patting your head before your brain vessels burst, schizo.
>>2781510Gen Z are all lefty woke trannies who fiddle kiddies and can't read and write anyway.
>>2781633So my dehumidifier that lasted 60+ years without any maintenance should have placed into a landfill, and replaced with a modern one that won't last 5 years? So my window AC that was functionally dead 5 years ago because of an easily repairable leak should have gone to a landfill because it would be cheaper to buy a new one than have it repaired? So I should have sent my older car to the crusher because rebuilding the AC would have cost over 4000 dollars, but I did it myself for under 500? I'm not pretending HVAC isn't complicated. But if people are willing to learn on their own time, it can be done safely and correctly. I posted an absolute gem of a book >>2749676 that people can learn from.
>>2781061Yeah, drug store mineral oil would be fine for that
>>2781720Too late for that now. Smells nice though.
If your head pressure is spiking up instantly then my first guess would be a restriction. If it's a slight restriction you might find a cold spot where it's trickling by. If it's fully blocked then it's difficult to pinpoint without opening the system up, isolating sections and narrowing it down. I'm guessing your capillary tube is fucked up since that's really easy to do wrong. The trick is to take a triangular file and gently trace a cut round and round until the tube falls off on its own. You want to avoid kinking or flattening the tube. Are you certain you cut both ends of the cap tube? Also are you sure you're using the right solder? I've been doing HVAC for a while and have never seen someone use plumbing solder on a refrigerant line. I was taught to braze, which is the same technique as soldering but at higher temperature with a different type of solder and torch. From what I'm finding on google solder is weaker overall and much more prone to cracking and leaking, which is a bigger worry given you're using a flammable refrigerant. If you're sure you know what you're doing then ignore me, but it did leap out to me. I would also question your choice of refrigerant and if it's charged with the proper amount. Does this unit have a data plate you could post?I'm a little jealous, looks like a fun project.
The pilot light in my furnace burns orange for a few seconds and then snuffs itself out.Are there like a million different things it could be, or is it probably just dirty?
>>2781761brazing is no doubt better, but for us homegamers, sil-fos silver solder works good
>>2748754propane is a fantastic r22 substitute. pt chart lines up very close. bbq is 95% propane, with methane and butanei forget the process, but u can separate them easy. methane mostly the issue, acts as a non condensable. i think it was as simple as venting your bbq gas for a bit, get all that nasty methane out.
>>2781761Stay-Brite 8 is a solder approved for refrigerant lines, yes. You can check it out on amazon if you're intrigued. Its a somewhat new product and pretty expensive but it enables a much lower barrier to entry to DIYers that dont want to buy an $800 brazing setup to do two refrigerant lines.
>>2781870My guess would be your flame sensor isn't detecting the flame. There's usually a little metal rod (thermocouple) that tells the circuit board that the pilot flame is detected and it's okay to continue starting up. It's there so that if your pilot isn't detected it won't just dump gas into your house. If you have a multimeter you could set it to ohms and see if your thermocouple is getting the correct resistance based on temp. An old trick is to put the thermocouple in a glass of ice water because you know for certain that the ice water will be exactly 32 degrees and you can reference the chart to see if you have the right resistance at 32 degrees. I doubt it would be caused by dust or dirt in the pilot since I would expect more of a consistent clog out of that. This sounds like the unit consistently deciding to shut off the pilot which is more consistent with a bad flame sensor.
>>2781761Hey fren, I followed up saying that the actual cause for the motor tripping was the run winding not shutting off, I had the start relay on its side causing that. Thanks for the cap tube tips though, I wasn't entirely sure how to cut it without flattening it.Staybrite 8 is a higher temp silver solder with comparable strength to brazing. It eliminates the need for an oxy torch and nitrogen purging while brazing. I did a lot of research into it, and its used on residential AC lines even today. There are quite a few YouTube videos of it working even on high pressure 410A systems.
Here is the finished filter setup. It doesn't freeze the freeze the coil up which I was concerned may be an issue.
>>2782063>>2781872>>2781967I'm sorry lol I should have read the rest of the thread. That's really cool. I've been doing HVAC a decade and here you guys are teaching me stuff I didn't know. Thank you frens
>>2782059Thanks. I'll see if I can't replace it.
>>2781967stay brite! yes, thats the shit i used. maybe not technically as good as braze, buy fine for DIY.
>>2780345whoever hooked up those wire ends should promptly kys themselves, I hope it wasn't (you).
>>2782059I got it going now. I think it was the thermocouple (which is all rusted), but I ended up just touching it a little and now it's working.
>>2747848Just got back home after being away for awhile. A/C won't run automatically. I reset the breaker and switched out the thermostat and I can go to the outside condenser unit and manually run it while depressing the contact but otherwise it won't run. pic unrelated
>>2747848>first time using pierce valve>screw it in, screw the needle in, nothing happens. screw it in more nuffing happens, hex key strips stripping the bolt, manage take out. now i don't wanna talk about again.
Can I use off cycle defrost in a car ac? I can get the temps out the vents a few degrees freezing and then cycle off. It goes up few degrees above freezing before cycling back on. Will this be enough to keep the evaporator from freezing over? Pic related its modded AC controller
>>2747848>Anyone else do their own HVAC and refrigeration work?yes everything except the freon stuff.AC stuff is easy especially with youtube.
>>2787970Why TF is your evaporator getting so cold in a car's air conditioner? I'd be trying to force more air through it and eliminate the problem in the first place before I tried anything else, even if you insist on getting near-freezing air out of the vents.
my 2 year old unit has an aluminum evap coil that is leaking. is this normal? or am i getting fucked by big hvac
>>2788242Colder is better
>>2787970You're doing this in Summer, right?Explain your system..How are you now getting below 0°C in your car during summer?
>>2788396Just clean the condenser good or get a new one (OEM) and upgrade the fan/wiring. And make sure the fan cant suck in warm engine bay air by shielding it off. Anyway I fucked up by using a faulty thermometer probe that reads 4 degrees too warm so I have it set too cold. Still no freezing action happened.
>>2788396Air dam thing
My fridge has been dripping for months and I'm too tired to look into it
>>2788399What refrigerant are you using?What wattage is your compresser?What psia is your compressor?What kind of control circuity is driving your compressor?
Also insulate the suction line. You dont want engine bay heat getting into the refrigerant.>>2788766>What refrigerant are you using?r134a>What wattage is your compresser?idk>What psia is your compressor?varies with rpm>What kind of control circuity is driving your compressor?>>2787970
>>2788551Either the drip tray is missing or tilted severely, your house is way too humid, or your fridge seals have a large leak.
