Most of the time you have what they call a cartridge dryer on a large chiller. They are bolted together. You would isolate that section of the system, recover the refrigerant that is in there or pump it out of there with your compressor, and completely isolate that section. Unbolt the cover off and remove the dryers. The new dryers would come with a gasket to put on the cover. Then you would have to pull a vacuum on the dryer section, open your valves, and you should be set to go. But most of the time yes you will have a cartridge dryer. I hope this answers your question. Good luck and thank you for watching!
Thank you very much! And I am so glad because that's why I'm doing this, just trying to help some guys out there lots of new material. Thank you and keep learning!
For the liquid line filter dryer you would look for a temperature difference between the liquid line filter dryer inlet and the liquid line filter dryer outlet. If you feel a temperature difference then the liquid line filter dryer needs to be replaced. When the dryer is clogged up it will create a pressure drop and because of the Flash gas that is created, it will act like a metering device and have a pressure drop. In other words that liquid that's coming in will flash off and there will be a temperature difference. I hope this makes sense. If you have any questions let me know. Good luck and thank you for watching!!!
Awesome video. So what would that do to the system if the suction line filter was plugged? Would it lower the suction pressure entirely? Could that cause the suction line to freeze?
If the suction line dryer gets clogged the pressure is going to drop after the suction line filter dryer. The pressure is going to rise before the suction line filter dryer or in other words the pressure is going to rise in the evaporator. Because of that evaporator is no longer going to be the 40° that we want it to be. With the suction pressure lowered after the filter dryer this will put a strain on the compressor because the superheat will increase and the compressor will most likely overheat and go out on internal overload. I hope this answers your question and thanks for watching!
on a variable speed compressor like the bosch (25%-110%) ids 1.0 ; should the system be put into force mode (100%) before you test the temperature difference? for me in regular mode when its about 50%-70% compressor running load the Temp Delta is about 5-6 degrees however if I put it in force mode its under 2degrees. Manufacturer says it must be in force mode in order to be able to charge. I am assuming the same holds true for the Liquid line temp difference across the direr? is that true?
Yes, that is true! Only when it is working at 100% will you get the true readings. Including across the dryer. This is almost like trying to charge a compressor with unloaders with the compressor partially or fully unloaded. They must be working 100% so we get all the true readings. Thank you for your question and thank you for watching!
@@AirConAcademy Thank you. In my attic I had one (1 out of 8) of the ducts come out from the main by about 1/2 (So i was blowing cold air into my attic. My suction line pressure was about 122/120 maybe 125 instead of the 130 that the Bosch unit is trying to maintain; and because it couldn't maintain it, the amperage would go up in order to try to keep that 130. Now that I fixed that issue the suction line temp is back at 130 however I am testing in 76degree weather as opposed into the 88 degree that it was when it was at 120psi. Could 1 attic round duct not connected properly to the main trunk have caused such a big impact on performance? or its the weather outside that its putting less load on the unit ; therefore its able to maintain its specs. My Subcool is between 8 and 10 which is speck; and superheat is about 10, sometimes 12 , under "Force Mode 100% load" but its supposed to be between 12 and 18. I am trying to figure out if my system is running ok. My previous electric bills were about $100/mo for a 1300 sqfoot brick house; insulated, @20c /kw
@@iancunicolae2626 when the ducts come loose from the main trunk yes that creates a problem throughout the entire unit. Also as the outside temperature changes your high side pressure will change and so will your low side pressure. I always tell people in class "this is not rocket science." And because of that I get them to understand that the pressures that we are given by the manufacture are ideal but we are never going to reach those or maybe I should say we are not going to be at those four long. So, as the heat load increases or changes in the house the pressures were also change. As the temperature changes outside the pressures on the high side will also change. It sounds like your unit is running pretty well! As long as you are not leaking air into the attic it sounds like it is doing really well. Good luck and thank you for sending the message over to me!
I ran into a slfd with a significant drop in temperature from each side. Can I safely assume that it’s plugged really bad like I would a liquid drier ?
I have never seen a SLFD that has a temperature drop from one side of the suction line filter dryer to the other side! Yes it could be that it is plugged up and you might even be getting liquid back to it? If you have a temperature drop across the suction line filter dryer I would change it just to be sure!
Im a little confused. Shouldn't it be liquid passing through it? Isn't the filter dryer located between the condenser and the evaporator and refrigerant is passing through it in liquid form, heading over to the TXV and finally the evaporator?
Yes! If we are looking at the liquid line there would be a liquid line filter dryer on the liquid line and will be checking for temperature difference. But in this video I was talking about a suction line filter dryer which would only have low pressure, super heated refrigerant vapor coming through it, not liquid. In this case we would check for a pressure drop across the dryer not a temperature drop. Thank you for sending in your question! I hope this makes sense.
Your gonna have a bad day.. or a hot one.., Suction driers have different stuff inside so if it sits in the liquid line it will possibly break up and clog itself up.. but a liquid drier will work on a suction.,
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Very easy to understand... My question is which filter is using in big chillers.. I mean 500tr etc
Most of the time you have what they call a cartridge dryer on a large chiller. They are bolted together. You would isolate that section of the system, recover the refrigerant that is in there or pump it out of there with your compressor, and completely isolate that section. Unbolt the cover off and remove the dryers. The new dryers would come with a gasket to put on the cover. Then you would have to pull a vacuum on the dryer section, open your valves, and you should be set to go. But most of the time yes you will have a cartridge dryer.
I hope this answers your question. Good luck and thank you for watching!
Thank you Sir for this outstanding lecture!
You are welcome and thank you for watching!!!!
Thank you for this video. I learn something new today about filter drier...
Thank you very much! And I am so glad because that's why I'm doing this, just trying to help some guys out there lots of new material. Thank you and keep learning!
Thanks,I did enjoy,so pressure drop tells us it's time for changing the suction line filter dryer. What about the liquid line filter dryer?
For the liquid line filter dryer you would look for a temperature difference between the liquid line filter dryer inlet and the liquid line filter dryer outlet. If you feel a temperature difference then the liquid line filter dryer needs to be replaced. When the dryer is clogged up it will create a pressure drop and because of the Flash gas that is created, it will act like a metering device and have a pressure drop. In other words that liquid that's coming in will flash off and there will be a temperature difference. I hope this makes sense. If you have any questions let me know. Good luck and thank you for watching!!!
@@AirConAcademy thanks for your answer, that really makes sense.
Awesome video. So what would that do to the system if the suction line filter was plugged? Would it lower the suction pressure entirely? Could that cause the suction line to freeze?
If the suction line dryer gets clogged the pressure is going to drop after the suction line filter dryer. The pressure is going to rise before the suction line filter dryer or in other words the pressure is going to rise in the evaporator. Because of that evaporator is no longer going to be the 40° that we want it to be. With the suction pressure lowered after the filter dryer this will put a strain on the compressor because the superheat will increase and the compressor will most likely overheat and go out on internal overload. I hope this answers your question and thanks for watching!
on a variable speed compressor like the bosch (25%-110%) ids 1.0 ; should the system be put into force mode (100%) before you test the temperature difference? for me in regular mode when its about 50%-70% compressor running load the Temp Delta is about 5-6 degrees however if I put it in force mode its under 2degrees. Manufacturer says it must be in force mode in order to be able to charge. I am assuming the same holds true for the Liquid line temp difference across the direr? is that true?
Yes, that is true! Only when it is working at 100% will you get the true readings. Including across the dryer. This is almost like trying to charge a compressor with unloaders with the compressor partially or fully unloaded. They must be working 100% so we get all the true readings. Thank you for your question and thank you for watching!
@@AirConAcademy Thank you. In my attic I had one (1 out of 8) of the ducts come out from the main by about 1/2 (So i was blowing cold air into my attic. My suction line pressure was about 122/120 maybe 125 instead of the 130 that the Bosch unit is trying to maintain; and because it couldn't maintain it, the amperage would go up in order to try to keep that 130. Now that I fixed that issue the suction line temp is back at 130 however I am testing in 76degree weather as opposed into the 88 degree that it was when it was at 120psi. Could 1 attic round duct not connected properly to the main trunk have caused such a big impact on performance? or its the weather outside that its putting less load on the unit ; therefore its able to maintain its specs. My Subcool is between 8 and 10 which is speck; and superheat is about 10, sometimes 12 , under "Force Mode 100% load" but its supposed to be between 12 and 18. I am trying to figure out if my system is running ok. My previous electric bills were about $100/mo for a 1300 sqfoot brick house; insulated, @20c /kw
@@iancunicolae2626 when the ducts come loose from the main trunk yes that creates a problem throughout the entire unit. Also as the outside temperature changes your high side pressure will change and so will your low side pressure. I always tell people in class "this is not rocket science." And because of that I get them to understand that the pressures that we are given by the manufacture are ideal but we are never going to reach those or maybe I should say we are not going to be at those four long. So, as the heat load increases or changes in the house the pressures were also change. As the temperature changes outside the pressures on the high side will also change. It sounds like your unit is running pretty well! As long as you are not leaking air into the attic it sounds like it is doing really well. Good luck and thank you for sending the message over to me!
I ran into a slfd with a significant drop in temperature from each side. Can I safely assume that it’s plugged really bad like I would a liquid drier ?
I have never seen a SLFD that has a temperature drop from one side of the suction line filter dryer to the other side! Yes it could be that it is plugged up and you might even be getting liquid back to it? If you have a temperature drop across the suction line filter dryer I would change it just to be sure!
Im a little confused. Shouldn't it be liquid passing through it?
Isn't the filter dryer located between the condenser and the evaporator and refrigerant is passing through it in liquid form, heading over to the TXV and finally the evaporator?
Yes! If we are looking at the liquid line there would be a liquid line filter dryer on the liquid line and will be checking for temperature difference. But in this video I was talking about a suction line filter dryer which would only have low pressure, super heated refrigerant vapor coming through it, not liquid. In this case we would check for a pressure drop across the dryer not a temperature drop. Thank you for sending in your question! I hope this makes sense.
Good explain sir.
What if I fix liquid line filter over suction line .
Your gonna have a bad day.. or a hot one.., Suction driers have different stuff inside so if it sits in the liquid line it will possibly break up and clog itself up.. but a liquid drier will work on a suction.,
thank you sir.
Glad you liked it!!!
Nice Thanks
Glad you liked it !! Thank you!!!
Thank you ❤️
Thank you! I'm glad you like the video and I hope it helps you out there in the field!