Refrigerant Filter Drier Location- Where to Install and Why!

This HVAC Video is about where you should install a filter drier, what the job of a filter drier is, the potential for leaks in a filter drier or accumulator, what the difference is between a heat pump and an AC filter drier as well as other tips! Supervision is needed by a licensed HVAC Tech before doing this as Experience and Apprenticeship garners Wisdom and Safety.
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⚠️ Disclaimer:
Information in this video is intended for educational purposes only. Any work related to the topics in this video should be performed by licensed technicians or by apprentices under the supervision of licensed technicians. AC Service Tech LLC is not responsible for any possible damages or injuries caused by the use or misuse of any information provided. ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
#hvacr #hvacr #hvactrainingvideos #hvactraining #hvactraining101 #acservice #acservicetech #filter #filterdrier #sightglass #solenoid #solenoidvalve #refrigeration #refrigerationsystem
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[@acservicetechchannel]

Tool List- www.amazon.com/shop/acservicetech Support- www.patreon.com/acservicetech For those that are looking for the tools used in the videos: (Links in the Description Section)

[@jollyscaria1922]

Leuiq lind conedsoashion

[@jollyscaria1922]

Boas maun sir leacking

[@Amphialus]

I've never heard/read a good justification behind people installing the filter drier outside and just after the condenser. A crucial purpose of the filter is to protect the metering device from loose debris since it's one of the most delicate devices in the system. As you describe in the video, the filter should be placed close to the metering device. When you install it outside directly after the condenser, any debris/contaminants in the fluid line (which is often 25' - 50' long) between the filter and the metering device will be flushed into the device on initial charge before being trapped in the filter after one full cycle. With the filter placed just before the metering device, it will catch all this debris between the condenser and meter before it has a chance to enter the device. Of course, after a full cycle the filter placement won't matter in this regard, but whatever debris is in that 25' or 50' of fluid line at initial charge could be enough to damage the metering device. Then there's corrosion when installed outside, as you've explained. Great videos.

[@jollyscaria1922]

Liuked line ..discharge line ner fixeing

[@timthetoolman5522]

Thanks for the information. Seems obvious that many techs just go for the easiest install rather than the proper one.

[@schumcreative]

By far, the best video I have seen on this topic. Thank you.

[@airmechanical7163]

Good video. I see so many dryers laying outside in the muck .

[@acservicetechchannel]

It is crazy isn't it? Thanks!

[@sgreen7401]

Very fluid talker you are mister. I like it and I can only hope you continue with sharing your knowledge. Bravo to you sir

[@Lets-Crusade-1095]

I’ve only seen filter dryers outside. Right near the condenser. Here in Indianapolis

[@acservicetechchannel]

It is not that much harder to install them in front of the evaporator coil so they don't rust out. I am also near the ocean so they rot faster due to the salt air, thanks

[@argenismoreno7253]

Thanks for this video. Is it indifferent to place the line filter vertically or horizontally? What do you advise me? thank you.

[@acservicetechchannel]

It can be installed vertically or horizontal but make sure the directional arrow is facing in the correct direction unless it is a bi-flow filter drier, thanks!

[@wasimedoo1506]

How can I know the size of filter to replace is there a number of cod how can I know the size to replace thanks

[@argenismoreno7253]

Is it a good idea to replace a half 1/2 inch line filter instead of the original 3/8 inch line filter that comes with the equipment? Thanks for this video

[@williampetty3544]

Good video . I’d like to see a video on a unit with 2 circuits that share a condenser, an how to tell which filter dryer goes to which circuit.

[@acservicetechchannel]

William, thanks for letting me know what you would like to see!

[@picklerix6162]

For some reason, no filter drier was installed in the liquid line of my old condensing unit. It looks like there was a muffler installed in the hot gas line by the manufacturer. I did install a filter-drier outside when the suction line inside the condensing unit developed a leak. The filter drier was somewhat protected from the rain by an overhang so it never rusted or leaked for 11 years. The compressor finally died after running for 27 years. The one thing that I have noticed that causes accelerated rusting of exterior-installed liquid line filters is overheating of the filter and damaging the paint on the steel surface of the drier.

[@stephenavallone5661]

You say + or - 2 psig across the filter indicates a restriction but to be safe use + or - 4 psig. But wouldn’t the higher pressure indicate a greater restriction and + or - 1 psig be the safer limit?

[@erics9213]

I installed my 3.5 r\ton Goodman heat pump in 2016. The filter drier was already installed in the condenser. Should I just leave it as it still looks new?

[@chadschafer7277]

What about the manufacturers that have them installed in the condensing unit. Its in contact with the outdoor conditions?

[@acservicetechchannel]

Absolutely Chad, there is nothing we can do about that. For systems that don't have them or an accumulator outside, they are the thinnest tin out there. The brazed part melts the paint off and that is where they rot out at. The filter direr in the video is an extreme but they still rust. As a service tech in your area, if you are not finding them leaking then it is not that big of a problem. I will say that for most installations, it is fairly easy and not that much more work to put them inside. Thanks Chad!

[@steveo7624]

craig I try to place the dryer half way on the liquid line thats where I was taught and 30 years later alot of those units are still running

[@acservicetechchannel]

Great yeah as long as they are not outside, thanks!

[@CarlosEduardo-ci6iz]

Ive looked in my Trane condenser unit and I only have an acumulator next to my compressor. Or is it in fact a filter drier? I see no other device anywhere along the liquid line. Any thoughts?

[@tejanochris]

The bottom of my drier looks burnt. Is that any indication of a bad drier? Thank you.

[@ghostridergr8259]

if we make vagum 3 times and fill with nitrogen can you take out the humidity from system??? system require only 525 grammar freon

[@FayazAhmed-ln6pd]

What is the reason only compressor turn on then off with in 30-40 seconds fan will works fine and I have 24 volts continuous please let me know

[@sandraledger2612]

When Fact Sheet says Change filter drier after opening unit for service. Which filter drier gets changed? The filter drier on my Carrier R410A unit is on outside.

[@robevans8629]

My master technician I ride with almost always puts the filter drier inside the outdoor condenser, so installing the new filter drier near the evap is more preferable then in the Outdoor unit?

[@acservicetechchannel]

Yes indoors is always more preferable unless it came from the factory installed inside the outdoor unit. I have never had one rot out inside but I have had many rot out outside and their is no difference for the refrigerant flow or other concerns. The tech may just not want to go in the house to braze. But as all of us have done, follow the tech's procedures until you get out on your own. Then you can make your changes to your procedures without offending him, Thanks Rob!

[@luisaleman4008]

If the filter dryer is inside the condenser should I recover the refrigerant and replace the filter dryer? Is a pain in the ass to replace specially on Goodman and Lennox shits

[@SB-cm7db]

What about on a mobile home?

[@mohammedfarooqueshaikhirfa467]

Hello sir how we know which dryer need which hot by pass valve? Hot by pass valve depend on compresssor or evaporate?

[@nothankyou5524]

Nicely done

[@acservicetechchannel]

Thank you No Thankyou!

[@williampetty3544]

Something else about filter dryers I didn’t know, just because they physically fit does not mean they are the correct dryer for the capacity of the unit . Example - there are different types of 3/8 dryers for bigger units.

[@acservicetechchannel]

Absolutely, there is a wide range of systems that will accept 3/8" connections but we use larger ones for larger systems so that there is a reduced friction across the filter drier and for more water storage capacity, thanks!

[@salehalobaidli7362]

Hi, thanks for the information. Can we replaced oil Trip with filter.

[@JP-zz5rm]

The line set your brazing it on is it 3/8 or 1/2?

[@popsthemachine247]

Just subscribed thanks. You said the filter could only hold so much water vapor, but where would the water vapor you mentioned come from ?

[@acservicetechchannel]

Great Question! This would come from servicing or improper beginning vacuum pumping. There will always be some even if little. The filter drier also holds acids and due to the filtration, will stop foriegn material and a possible copper shard. You don't know who may service this unit after your installation. Thanks!

[@MrGoldman9]

hello mister I have a question Does this filter protect the compressor by not leaving the sifted oil during operation and damaging it in the long run? Is this for the same reason that some people keep twice the copper extensions along with the external unit to protect the compressor؟

[@Takeithome345]

Dam dude you make some kick ass vid!!! I just saved your entire collection!!!!

[@acservicetechchannel]

Glad you are enjoying them. I am assuming you mean saved the "all acservicetech" playlist or links right? These videos shouldn't be saved off of the platform without authorization, thanks Frank!

[@Takeithome345]

acservicetech yes sir !!

[@acservicetechchannel]

Thanks a lot Frank!

[@greyholcombjr.9623]

Had a new Trane split HP installed Feb 2020. Recently discovered the crew did not install a filter drier. System heating and cooling well. Delta-T 19-20 deg diff in a/c mode. New line set installed. Not sure if nitro was flowed while brazing. Will not be using install contractor again. Should I just let it ride at this point and have one installed down the road if the system has to be opened for any reason, such as a leaking coil ? It would cost less at that time. To do it now would probably be $300-$350 labor & materials. I'm guessing at that. What is your opinion ? Do now or later ? Thanks

[@alicepet1994]

How to decide the filter drier size and flow rate if you see a filter like the bottom in your video and want to replace it?

[@cv4u]

Very informative- Thanks

[@acservicetechchannel]

Thanks Dennis!

[@kratosleunitis2584]

if the filted dyer don't feel hot or warm, could that make a damp smell?.

[@corvairbob65]

my girl has a 30 year old rheem 1.5 ton unit and the dryer is outside but in good shape. but this year the unit did not cool good. i found tons of crud on the condenser coil and cleaned it. it has at 80deg outside temp running it had 35# and hs 150# temp on the liquid line at the service valve was 83 deg and at the evap it was 56 deg. i did not think to check the temp at the dryer but i wonder if the 30 year old dryer may be the issue. i soaped all the fittings the evap ends and condenser ends and no leaks. in the foo state at 80 deg it had 112# and 3 weeks later at 60 deg it had90# so i do not think the unit has any major leaks. but now i think the dryer may just have failed. should i got back and start it up and test the temps again to see if they are different at the dryer? if so can i jst actuate the relay outside and run the unit without the furnace calling for the ac unit to run? or will that cause a error due to superheat at the evap? it has cap lines on the evap. thanks

[@bandit8623]

Why face the arrow towards the evaporator coil? The hot liquid is going the opposite direction to the outside pump.?

[@acservicetechchannel]

Jacob those are referred to as biflow filter driers and they have an arrow in both directions, thanks!

[@bandit8623]

@@acservicetechchannel mine is like the blue one in the vid. It has one arrow. This should be posted toward the outside pump correct? Thats the direction of the hot liquid.

[@jawidofkoj2998]

I have 2 questions: 1- what does tiole evacation mean? 2- is it safe to wear my wedding band while doing hvac work? Grear video, thank you!

[@acservicetechchannel]

Triple evacuation is vacuuming down to 50 microns or higher, then breaking the vac with nitrogen, releasing the nitrogen and vacing again, breaking the vac with nitrogen, releasing the nitrogen and vaccing again down below 500 microns. I have now switched to the silicone ring. Many do tatoos. Either way, we try to check as many things without amperage being drawn as possible for safety, thanks

[@jimbola77]

excellent thank you for sharing partner!!!!

[@acservicetechchannel]

Thank you!

[@karenoverton4645]

jimbola77 what if it hot

[@user-fn1dw8pu4y]

You can tell who’s a shoemaker by the location they pick to install a filter drier ! I see more brazed outside than inside yeah it’s crazy alright

[@acservicetechchannel]

Yup, Thanks Mason!

[@chadschafer7277]

Your next to salt water, that why that is so bad. The outdoor unit will rust out just as fast no matter where the drier is

[@parvindrajbhar9742]

Good

[@jamesrogers4674]

Where do I find how much refrigerant I add for an additional filter drier?

[@acservicetechchannel]

You would need to look up the filter drier model and look in the manufacturer literature. Each one has a different capacity, thanks!

[@jonathanraul4086]

Ty great video

[@acservicetechchannel]

Thanks jonathan!

[@toddbehrends1373]

This is off the subject of this video, but when you showed where the accumulator was, I noticed leaves and other material in the bottom of the condenser. When you notice that is it a good idea to suck all of the debris from the inside of the condenser? And using a garden hose to clean the fins, is that a proper way of doing it? I was working on my sons unit and when I opened it up, OMG!!!!! I used the hose to clean the fins. I am a novice at working on systems and have just purchased a set of gauges. Would it hurt to use his unit as a guiena pig, of sorts, to learn? I have replaced a circuit board and his indoor fan already by myself.

[@acservicetechchannel]

The units do accumulate leaves. I have seen even 5" deep with leaves before. Definitely clean them out and yes, water from the hose should be used first before using a coil cleaner. Then after the cleaner is applied and you have waited ten minutes, clean off with the garden hose again. Before doing this, make sure if there was a outdoor motor replaced, that there are no open connections for the hose water to get into, thanks Todd!

[@toddbehrends1373]

Thanks for the tip. Can you get the cleaner anywhere, or just at a supply outlet?

[@firaseliteservicesscorp.4718]

THIS VIDEO DOES NOT SHOW WHERE AND HOW TO INSTALL FILTER DRIER HE TALKS ABOUT IRRELEVANT STUFF MORE THAN HE SHOWS WHERE AND HOW TO INSTALL FILTER DRIER.

[@wasimedoo7994]

Can you please tell me how you know the size of the filter please thanks you God

[@xz86]

Is it ok to install larger filter? lets say 3.5ton unit with 5ton filter dryer

[@acservicetechchannel]

That would be ok especially if there was a burnout, thanks!

[@jenniferjones4204]

I was just told by a company that my drier filter which is inside should have been installed on the outside! He said the unit was not installed properly! And tried to get me to buy a unit from him for almost 9000.00! Ugh!

[@acservicetechchannel]

Ha ha that is sad and I am sorry to hear that. There is certainly nothing wrong with it inside. In fact, I live near the ocean and I can't remember the last one I installed outside due to rust. I always install inside, thanks!

[@thisisyourcaptainspeaking2259]

I've seen filter driers installed on the compressor high pressure side (outdoors, mounted to compressor, just upstream of changeover valve) in heat pump systems, is this an acceptable location (aside from being exposed outdoors)?

[@acservicetechchannel]

That is a muffler, not a filter drier when it is on the discharge of the compressor.

[@thisisyourcaptainspeaking2259]

@@acservicetechchannel Interesting, I hadn't considered this is a muffler. I had just assumed the parts list description was accurate but we all know that's not always the case, so good point and thanks for clearing that up!

[@morehp1]

I have a ruud heatpump. Coming straight of the compressor and right before the reversing valve, is what looks just like a dryer, its brazed in not spun copper. Is it a muffler or a dryer?

[@acservicetechchannel]

Yes on the discharge, that is a muffler, thanks

[@chrisdinuova682]

If you have a clogged filter dryer will that make the unit work harder and run more ?

[@acservicetechchannel]

Yes it is called a liquid line restriction. That increases the superheat and reduces the heat removal from the building

[@chrisdinuova682]

AC Service Tech LLC Thanks I had a tech tell me I have a clogged filter dryer and because my unit is 20 years old that I need to replace the whole unit.

[@chrisdinuova682]

How much does a filter dryer replacement cost? And do you recommend anybody in the West Deptford , New Jersey area ?

[@Pretzel114]

Hi ACSERVICETECH! Great video as always. I came across a filter drier the other day that was installed with flare fittings. I am taking who ever did it, it was for easy install and replace. But I never do it like that I braze them in. Is it ok to use flare fittings with the pressures in the line? Thanks again.

[@acservicetechchannel]

Many lower pressure systems like 134a have flare fittings but I really would try to minimize the amount of flares. They could be used and with the mini splits they don't give you a choice. If I have a choice, I always braze. Flares have a potential to leak especially if they get bumped. Many times that you see leaking flare joints on mini splits it is because of an improper installation that was not leak checked or vacuumed properly. Thanks!

[@Pretzel114]

Thank you ACSERVICETECH. Very good info. I agree with brazing when possible. I am not to familiar with mini splits yet, but it's good to know they use flares. Thanks again.

[@acservicetechchannel]

Glad to help!

[@jevinbrown7402]

off topic, As a new tech that's about to graduate what should I look for in terms of pay. In the NM, TX area. Currently looking for a job and want to know what I'm worth. I know we have to start somewhere but I think anything less than 10.00 is unacceptable.

[@acservicetechchannel]

This topic has come up before. I put a video out about it. Basically during the interview you want to ask questions that pertain to the long term. Because of this, the topics of what you would be starting out out, what the raise would look like at 3 months if you prove yourself and what the raise would look like after a year will likely come up. You bring up the topic without neccesarily asking just about money. I agree with your statement and to be truthfull, I started out at $10/hr in NJ 15 years ago and I didn't come from a tech school. kzbin.info/www/bejne/iGi4kH6orpZ2eKM

[@5822huron]

Jevin Brown I'm in third year-commercial tech .$23.50

[@rinorqe]

If the ac compressor already has a filter drier inside is it necessary to install another one on the lines?

[@acservicetechchannel]

As long as they have one that is new when installed they are ok. It is a shame that a couple manufacturers actually put them in the outdoor units. Most do not though and are field installed. Thanks for the Question!

[@Pretzel114]

Hi acservicetech. I hope you can help. I have an oil burner boiler with a triple aqustat. it makes hot water but the burner won't turn when the t-stat is turned up. I have 20 volts at t-stat and I have line volt to the aguastat. but when t-stat is turned up I have no 24 volt at the t-t on aquastat. I hope you can help. Thanks again.

[@acservicetechchannel]

Are you looking at something like a Honeywell L8151A? The unit may not be firing because the boiler temp has not dropped low enough yet for the unit to fire again. The T and T terminals do not work like a gas furnace would. To turn the circulator on you touch the t and t terminal together. If you have more than one zone then you do take power off of a transformer and that power when calling for heat opens the zone valve and the end switch closes the t and t terminals so the circ pump can come on. I hope this helps! Let me know if I did not answer your question. Thanks

[@Pretzel114]

Hi acservicetech, thanks for the quick reply. The aquastat is a Honeywell r8182d. I understand completely what you are saying about the boiler temp not being low enough. I am a little unsure on the t-t terminals. I know the t-stat goes to them, so are they the terminals that send 24v to the t-stat? I thought I would have 24v with my meter at the t-t terminals on the aquastat? The other thing is I push in on the relay for the burner and it won't start, shouldn't it start if I push that relay in and have it jumped out at t-t? Sorry for the confusion, I just don't work on the boilers enough like I do the warm airs. Thank you so much for the help.

[@acservicetechchannel]

In reference to the t t terminals, you can't hard power a thermostat off of those like a furnace that has common. When t and t are open it will read a potential of 24 volts. You do have 24v coming off and then the two get connected and then it goes to the load which in this case is a 1000 ohm resistance load in the board and then to common on the transformer which signals for the circ pump to come on. If you were to think about it, it is like a 24v hot going through a switch(thermostat) and then going to the 1000ohm load and then to common. The problem is you have one hot 24v and the other has common to the transformer and then the load and then to the t terminal if that makes sense. I usually just go ahead and jump t and t or turn the thermostat on to heat and run the system on full heat load so whether that is one zone or 8 zones in order to get the temp of the water to fall and then I watch for what temp the burner actually turns on at and then exactly what temp it shuts off at. I then make adjustments to the water temp setpoints based on that. I hope that helps!

[@Pretzel114]

acservicetech Thank you so much! this makes perfect sense and I put it in my notebook. I did some more test and I think like you said it is because the water temp is not low enough. The hard part was explaining this to my friend that has the boiler lol! But thank you so much for your info and time, your a god send. take care and I'm sure we will talk soon. If you get into Harrisburg PA and need anything send me a note. later boss.

[@acservicetechchannel]

Oh you are not that far away on the eastern seaboard. I am located at the southern tip of NJ. Ok, and thanks for your Comments and Offer!

[@mattsawesomeshow]

Hi Craig, I'm installing a Goodman 2 ton split system...GSXC18. I noticed on the outside condenser, down on the inside of the coil housing, right off the compressor on the 3/8 liquid line is a filter drier. Would I still install a second filter drier at the evap coil? Wasn't sure if that would create more of a strain on the compressor pushing refrigerant through two driers? I am on a 85' line set to the attic air handler. Thanks!

[@acservicetechchannel]

If it is on the discharge line right after the compressor, it is a muffler and not a filter drier so will be good for you to install a liquid line filter drier after the condenser coil. Best if it is inside the building to avoid rust, thanks!

[@potatolew4495]

All Goodman systems come with a filter drier installed on the inside of the condenser ahead of the comlressor, it is not a muffler. 25 years in the HVAC industry. Cheers from L.B.I.N.J.

[@Notcosma]

I notice that my condensing unit has one inside and the installer put one outside Is this hurting my efficiency?

[@acservicetechchannel]

The one inside may be a muffler if it is located on the discharge line on the compressor instead of the liquid line inside the outdoor unit. Usually there is only one and it will add some friction if there are two. If it were a new installation, it shouldn't have two liquid line filter driers, thanks

[@matthewedwardsnyder]

Whenever I have a leak at my braze joints it’s always at one of my filter drier joints. Does anyone know why I might have this issues? Drives me nuts.

[@josephhollingshead1848]

It's because the cooper is so thick where you make your connections and it's harder to get it hot wen your trying not to burn it up

[@Bongkats]

Hello does filter drier required in every installations of split type ac?

[@acservicetechchannel]

Yes is should be installed on every unit. Some already have the filter drier installed, thanks

[@grantlamb9140]

Your corrosion comparison had more to the with brand than anything else. Those are the exact same ones AMANA and Goodman install in their systems from the factory. I’ve been to many of them that are over 10 years old that still look like the one you showed. They resist corrosion extremely well. But, I’ve seen other brands look like that shitty rusty one in a matter of a year or two.

[@acservicetechchannel]

Yes the metal is even thicker on them. The rusty one came off of a unit at the beach, thanks!

[@rocker8692]

I heard it was 3 psi.

[@acservicetechchannel]

We usually take a temp reading as there typically is not pressure ports to check, thanks!

[@blazeeisner9620]

Hi it's Blaze from SoCal. I'm changing out a TXV and going to MO99 from R22. Should I add a filter drier. This is a 3 ton Rheem heat pump.

[@acservicetechchannel]

Absolutely add a biflow filter drier, thanks

[@blazeeisner9620]

acservicetech thank you for getting back to me. I added the drier and now I have the system evacuating. Have a great weekend.

[@usacitizen1000]

That real rusty one you have there looks something like the one that was just removed from my York outside home AC unit. From what I understand it is 'powder coated' and the corrosion on mine went undetected, as it was occurring under the paint/powder coating without showing on the outer surface until the last pangs of life when the coating peeled off in layers to reveal the rust underneath. And mine was only 5.5 years old. I contribute it to improper undercoating of the steel canister before the outer paint/powder coating was applied? photos/discussions here: I'm thinking it was a lousy China made product? How would you install the filter-drier unit 'inside' in these big self-contained outdoor home style AC's?

[@acservicetechchannel]

When I said inside in the video, I was talking inside the building in front of the indoor coil if the system is a split system. If the unit is an outdoor packaged unit then the filter drier would have to be installed in the unit which is outside, thanks!

[@usacitizen1000]

I figured that must be what you meant,...installing it inside vs outside. Have you seen a number of these filters rust to the extent of that one you displayed, and that one of mine? I've was in the boat business for years, and salt water boats as well, so I have experienced metals that were not properly prepared for their environment. This extent of rust under the outer coating reeks of the same problem,...improper undercoating!

[@acservicetechchannel]

Yes I have and I always advocate installing them inside on splits, but on package units I recommend wire brushing and painting them if they are starting to rust, thanks

[@rubencastillo9641]

Gtt rid of tht drum if I knew where it was I would

[@acservicetechchannel]

KZbin will not allow me to edit that out of older videos. Newer videos do not have that, sorry!

[@rubencastillo9641]

@@acservicetechchannel its ok I learn anyway

[@bwasfpv]

sir can i ask a question,,i have a problem with my condenser unit. the fan is not working but the compressor is,. i changed the capacitor for the fan and can work for maybe one day,but its the same problem,,not working,,how can i test the fan if it needs replacement or not.or is there any problem why the fan is not working

[@acservicetechchannel]

Here are two videos on that.--kzbin.info/www/bejne/ep6phISYpNyMf8lh---kzbin.info/www/bejne/ZobCk6OrotZ2iKs

[@roybrock7642]

What happens when a filter dryer just put in with the arrow going the opposite way