Jamie, You might want to mention oil charge with compressor failure. I've ran across systems almost dry and others over full. Oil is tricky if you don't know whats in the system, especially in Commercial applications where someone has done a conversion or left out the oil trap on rooftop units. Great Video!!
Hi Gered. If you're looking for help with sizing TXVs, our Coolselector 2 software is just what you need. We have lots of videos on how to use it, available here: ua-cam.com/video/9-Nn9Juwt2M/v-deo.html
Hi, Jamie. First for thanks for this video, these explanatios are very important for the correct instalation and help the mantenation teamwhen are necessary to discovery the problem the cause the fail of the compressor. I have a question. Why some kinds of compressors are hermetic seal? I beleve that if we could open the compresor, we could discovery fast the reason of the fail. What do you think about it? Best regards, My name is André Hergert, I'm a mechanical enegeniring in Sao Paulo, Brazil
Hello Andre. The main reason that some compressors are hermetically sealed is due to cost and ease of manufacturing. It is substantially more expensive to manufacture a semi hermetic compressor as the parts must be cast and drilled/tapped for bolts etc. This adds complexity to the manufacturing process and thus cost. On small compressors this is not feasible and even on larger compressors the cost difference is enormous. Since manufacturers are trying to be cost competitive, this fact is very important. I agree it would be nice to look inside the compressor as you could more quickly see why it failed.
Jamie, thanks for the answer. It is an aspect seen by the manufacturer that sometimes we do not understand at first. But now I understood and agree. Thank you very much for returning.
Hi Michael. Thank you for reaching out. What would the topics be that you would like covered? Is your shop primarily AC, Refrigeration or a mix of both? Given the limitations on travel currently, it may be several months before things open up a bit more.
Yes, in theory, but: It depends on size of the motor/compressor, and a soft starter is actually mostly installed to protect the additional electrical equipment, the mains power supply against voltage drops and sudden current surges. A soft starter will also to a degree protect the motor windings, hence the compressor.
Hi Jamie I would like to know how does increase in temeperature affects compressor working and leads to failure? ALSO .is it possible to reduce compressor failure by improving heat dissipation from the compressor?
Hi Akshata. Good question. The main ways that temperature affects the compressor working life are in bearing wear and motor winding life. The difference between the suction and discharge pressures determines the compression ratio. The greater this difference, the more work the compressor motor needs to perform and the greater the heat build up in the motor. If the superheat of the suction gas is high and the compression ratio is also high, this will lead to an increase in motor temperature and if the temperature gets high enough, the motor winding insulation will break down and the motor can short out. As well, the compression ratio and suction superheat also affect the discharge temperature and when they increase, so does the discharge temperature. Excessive discharge temperature can lead to upper bearing failure in scroll compressors and oil break down in any compressor that uses oil for lubrication. I hope this answers your question.
My fridge failed slowly. The compressor started rattling loudly when it shut off. It did this for a few years. Then the freezer would not be down to proper temp. This got worse over a few months until the freezer wouldn't freeze any more. What's up?
Thank you for your question. There could be a number of things causing this issue and and unfortunately symptoms that we see are not always related to the failure. Also, home appliances are not my area of expertise unfortunately. Given that the lack of ability to pull down the temperature increasing over time, this normally is caused by a leak of refrigerant or the ability of the compressor to compress the refrigerant indicating a lack of sealing by either the piston rings or vanes in the case of a rotary compressor or compressor valves. As well, the capillary tube metering device may also be gradually plugging due to waxes formed from oil etc. I do not know how old the fridge is, but I strongly recommend you call in a company who specializes in domestic appliances or if the fridge is more than 10 years old maybe opt for a new one. By the way, I just had to buy a new fridge last month due to this very same issue. My fridge was 13 years old. After my experiences taking both my washer and drier apart to replace parts (In both cases I looked like I had been in a sword fight afterwards.), I went shopping for a new one with my wife.
@@DanfossClimate Thank you for your reply, unfortunately in my area no refrigeration division, they only have drives and heating, can you provide a supplier names, because really it's problem to get Danfoss refrigeration parts in Ontario, and suppliers they never want to sell you Danfoss txv or solenoid..this is an issue from the field as I am refrigeration mechanic and I like to use Danfoss refrigeration parts, as I think it's reliable
Thank you. This was a trial run so to speak and we had some fun doing it. I think I will need to do something about the background however. The floral bed spread doesn't exactly fit in.
As always Jamie great job, thank you for your contribution to us in the field
Thanks, Tom!
Jamie, You might want to mention oil charge with compressor failure. I've ran across systems almost dry and others over full. Oil is tricky if you don't know whats in the system, especially in Commercial applications where someone has done a conversion or left out the oil trap on rooftop units. Great Video!!
Thanks for pointing that out. And thanks for watching!
a video about the piping problem you described at the end would be great.
Thanks for the suggestion! We'll pass along that feedback to our team.
Awesome that you guys are doing this. Can you please make a video of sizing and building txv’s from a kit?
Hi Gered. If you're looking for help with sizing TXVs, our Coolselector 2 software is just what you need. We have lots of videos on how to use it, available here: ua-cam.com/video/9-Nn9Juwt2M/v-deo.html
You should talk bout txv right position I been in jobs were it's no the txv its the way they install it
You might find this video interesting: ua-cam.com/video/xxURvn9y4ag/v-deo.html
Hi, Jamie. First for thanks for this video, these explanatios are very important for the correct instalation and help the mantenation teamwhen are necessary to discovery the problem the cause the fail of the compressor.
I have a question. Why some kinds of compressors are hermetic seal? I beleve that if we could open the compresor, we could discovery fast the reason of the fail. What do you think about it?
Best regards,
My name is André Hergert, I'm a mechanical enegeniring in Sao Paulo, Brazil
Hello Andre. The main reason that some compressors are hermetically sealed is due to cost and ease of manufacturing. It is substantially more expensive to manufacture a semi hermetic compressor as the parts must be cast and drilled/tapped for bolts etc. This adds complexity to the manufacturing process and thus cost. On small compressors this is not feasible and even on larger compressors the cost difference is enormous. Since manufacturers are trying to be cost competitive, this fact is very important. I agree it would be nice to look inside the compressor as you could more quickly see why it failed.
Jamie, thanks for the answer.
It is an aspect seen by the manufacturer that sometimes we do not understand at first.
But now I understood and agree. Thank you very much for returning.
How can I get a live training in Massachusetts to my shop?
Hi Michael. Thank you for reaching out. What would the topics be that you would like covered? Is your shop primarily AC, Refrigeration or a mix of both? Given the limitations on travel currently, it may be several months before things open up a bit more.
Will adding a soft start device benefit the longevity of scrolls?
Yes, in theory, but: It depends on size of the motor/compressor, and a soft starter is actually mostly installed to protect the additional electrical equipment, the mains power supply against voltage drops and sudden current surges. A soft starter will also to a degree protect the motor windings, hence the compressor.
Hi Jamie I would like to know how does increase in temeperature affects compressor working and leads to failure? ALSO .is it possible to reduce compressor failure by improving heat dissipation from the compressor?
Hi Akshata. Good question. The main ways that temperature affects the compressor working life are in bearing wear and motor winding life. The difference between the suction and discharge pressures determines the compression ratio. The greater this difference, the more work the compressor motor needs to perform and the greater the heat build up in the motor. If the superheat of the suction gas is high and the compression ratio is also high, this will lead to an increase in motor temperature and if the temperature gets high enough, the motor winding insulation will break down and the motor can short out. As well, the compression ratio and suction superheat also affect the discharge temperature and when they increase, so does the discharge temperature. Excessive discharge temperature can lead to upper bearing failure in scroll compressors and oil break down in any compressor that uses oil for lubrication. I hope this answers your question.
@@xrayexplorer thank u for quick reply can i have official email address to discuss more .
thank you jamie nice video 👌
Thanks! -Jamie
My fridge failed slowly. The compressor started rattling loudly when it shut off. It did this for a few years. Then the freezer would not be down to proper temp. This got worse over a few months until the freezer wouldn't freeze any more.
What's up?
Hi, Thank you for your comment. Let us get back to you about this as soon as possible :-)
Thank you for your question. There could be a number of things causing this issue and and unfortunately symptoms that we see are not always related to the failure. Also, home appliances are not my area of expertise unfortunately. Given that the lack of ability to pull down the temperature increasing over time, this normally is caused by a leak of refrigerant or the ability of the compressor to compress the refrigerant indicating a lack of sealing by either the piston rings or vanes in the case of a rotary compressor or compressor valves. As well, the capillary tube metering device may also be gradually plugging due to waxes formed from oil etc. I do not know how old the fridge is, but I strongly recommend you call in a company who specializes in domestic appliances or if the fridge is more than 10 years old maybe opt for a new one. By the way, I just had to buy a new fridge last month due to this very same issue. My fridge was 13 years old. After my experiences taking both my washer and drier apart to replace parts (In both cases I looked like I had been in a sword fight afterwards.), I went shopping for a new one with my wife.
Where can I buy Danfoss refrigeration parts from Ontario Canada? All suppliers they only Sporlan or Emerson parts
Hi! The best way to find out who carries our parts in your area is by using our Product Store: store.danfoss.com/us/en_US/find-a-distributor
@@DanfossClimate Thank you for your reply, unfortunately in my area no refrigeration division, they only have drives and heating, can you provide a supplier names, because really it's problem to get Danfoss refrigeration parts in Ontario, and suppliers they never want to sell you Danfoss txv or solenoid..this is an issue from the field as I am refrigeration mechanic and I like to use Danfoss refrigeration parts, as I think it's reliable
@@mikefreedom5612 Great to hear you prefer our parts. :)
Have you checked with Independent Supply Company? ischvacr.com/
@@DanfossClimate I prefer Danfoss because I use it before in another country. I will check with independent supply, thank you!
Thanks a lot
Thanks
Interesting stuff Jamie!
Thanks.
Thank you. This was a trial run so to speak and we had some fun doing it. I think I will need to do something about the background however. The floral bed spread doesn't exactly fit in.
Hi
Hi, Robert 😄