So if you push in the contractor to pump the rest out you could in theory sweat out any components like solenoid valve without the fear of creating fosgene? Some tech I’ve trained with always cut into the line and let the residual bleed out wherever the solenoid in my example would be. Just curious I could take this knowledge and show the techs something they have over looked.
@@dan9988 the valve on the outlet of the receiver so the Freon will not leave the receiver . The Freon will be isolated to the high side of the system in the condenser and receiver . You can also shut the suction valve on the compressor too.
a question I closed the receiver The pressure dropped to 5 psi The compressor turns off And when I ran to change a drier filter Suddenly I realized that the pressure was rising again. What do you think could be the reason for this?
system needs to be fully pumped down also. 5 psi is still pressure in system and residual gas in system or liquid still burning off in system or out of the oil which will create pressure
If you make repairs after pumping down the system. Can pressurize it with n2 with it isolated? Or would I only be able to evacuate and then open the valves
@@La2venida you can always pressurize with nitro to leak check but if you know you brazed it right and are confident in your repair / braze it’s not necessary.
Would you front seat the high side service or the compressor suction inlet valve after you pump everything into the receiver (outlet front seated) to make sure nothing flows back towards the low side? If you only front seat the reciever outlet..how is the refrigerant isolated in the tank
Refrigeration Technology it’s isolated in the reciever because you close the valve on the receiver outlet so the gas can’t get out of it . You can close the suction valve after if you want but it’s not necessary . Don’t close the discharge one especially if the unit is running. You’ll blow the valves
CSC Refrigeration and Hvac I don’t have an issue with you helping the younger guys out. In fact I appreciate it as I too learnt a lot from people posting videos on RUclips. However, a lot of the good folks like heavy diesel and Jim P just tell and don’t show. If younger people want to be told and shown then they need to go back to school and learn it from their teacher. You can’t spoon feed young people all the time or else they won’t challenge themselves to know and understand better. They must develop to have skills and intuition and not what a video on RUclips said I must do etc
Nolan King I understand and respect what you are saying but some people are like me. I didn’t learn crap from school. I have to see it and do it myself . I’m sure you can agree that most of this trade is self taught and learned through trial and error in real world situations . School can tell you how a system operates and that’s it. School doesn’t teach how to fix things
CSC Refrigeration and Hvac your video is not the complete way of pumping down a system. You haven’t taken into account the safety aspect and things like that will get people killed. Hence why you shouldn’t be showing it. PS the proper way is to make sure you have a high side gauge hooked up and check to see if all the refrigerant can safely fill the liquid receiver and if not the HP safety to cut it out and how to use an auxiliary bottle to help pump it down.
Thank you for helping the next generation technicians! 30 years old and I'm learning as much as I can. Thanks for making videos
I've been stressing about how to do this, thank you so much for the straight to the punch explanation
You have made it clear . Thank you. Al.
looks like the Everett food distribution center!
Spot on and straight to the point 👍👍👍💯
Thanks for the tip. You do great work. Love the vids, Keep them coming.
Thanks a lot for watching man !
So if the unit doesn't pump down, does it mean it has a bad compressor?
Not necessarily
Can I replace compresor when pump down?
So if you push in the contractor to pump the rest out you could in theory sweat out any components like solenoid valve without the fear of creating fosgene? Some tech I’ve trained with always cut into the line and let the residual bleed out wherever the solenoid in my example would be. Just curious I could take this knowledge and show the techs something they have over looked.
yes you can do that for sure
will which valve do you shut down when it gets to zero to isolate the refrigerant in the reciever. you showed the first valve right away.
@@dan9988 the valve on the outlet of the receiver so the Freon will not leave the receiver . The Freon will be isolated to the high side of the system in the condenser and receiver . You can also shut the suction valve on the compressor too.
Thanks for that man you don’t know how much it helped me!!
a question I closed the receiver The pressure dropped to 5 psi The compressor turns off And when I ran to change a drier filter Suddenly I realized that the pressure was rising again. What do you think could be the reason for this?
leaking compressor valves or solenoid valve, front seat the compressor adn check
system needs to be fully pumped down also. 5 psi is still pressure in system and residual gas in system or liquid still burning off in system or out of the oil which will create pressure
How does it not escape , if you only close the one valve?
You close off the liquid receiver outlet valve after the system shuts off on low pressure to isolate the tank
@@strimbimmin328I don’t get it
"wind the valve all the way down" lol
So if you want to work on an evaporator but the old compressor has some internal leakage or bypass this is where it would present itself?
If that the case, you may have to front seat the suction and discharge at the compressor service valve.
If you make repairs after pumping down the system. Can pressurize it with n2 with it isolated? Or would I only be able to evacuate and then open the valves
yes , you can pressurize it while its isolated
@@Cscrefandhvacwhat is the normal practice. Do the repairs and do evacuation without pressurizing with N2? That’s what I have been seen
@@La2venida you can always pressurize with nitro to leak check but if you know you brazed it right and are confident in your repair / braze it’s not necessary.
AWESOME, THX!
what about the solenoid in the evaporator, does that need to be activated or not while it's pumping down?...trying to replace evap coil
Yes the solenoid will need to be “ On or Open “
@@Cscrefandhvac thank you!
very good man
Thanks
Thanks alot 👍🏻
i like the tips. thanks
Would you front seat the high side service or the compressor suction inlet valve after you pump everything into the receiver (outlet front seated) to make sure nothing flows back towards the low side?
If you only front seat the reciever outlet..how is the refrigerant isolated in the tank
Refrigeration Technology it’s isolated in the reciever because you close the valve on the receiver outlet so the gas can’t get out of it . You can close the suction valve after if you want but it’s not necessary . Don’t close the discharge one especially if the unit is running. You’ll blow the valves
@@Cscrefandhvac you can change a dual pressure control like this or do you need to recover?
Refrigeration Technology you need to close the discharge valve as well and get the remaining gas out of the compressor , then you can change it
Thx
Flat Ulence your welcome , anytime . Thanks for watching
That's not a rack it's a unit huge difference
Yes. Where are you getting a rack from ? I never mentioned a rack
😎😎👍👍👍👍
Our trade is a licence trade. You now making DIY people doing it themselves just for likes and video subscriptions! Such a shame.
Nolan King what are you talking about ? I’m doing it to help out the younger guys in the trade .
CSC Refrigeration and Hvac I don’t have an issue with you helping the younger guys out. In fact I appreciate it as I too learnt a lot from people posting videos on RUclips. However, a lot of the good folks like heavy diesel and Jim P just tell and don’t show. If younger people want to be told and shown then they need to go back to school and learn it from their teacher. You can’t spoon feed young people all the time or else they won’t challenge themselves to know and understand better. They must develop to have skills and intuition and not what a video on RUclips said I must do etc
Nolan King I understand and respect what you are saying but some people are like me. I didn’t learn crap from school. I have to see it and do it myself . I’m sure you can agree that most of this trade is self taught and learned through trial and error in real world situations . School can tell you how a system operates and that’s it. School doesn’t teach how to fix things
I also learned from guys I worked with out in the field and now I have an opportunity to maybe teach or help out some people so that’s what I’m doin g
CSC Refrigeration and Hvac your video is not the complete way of pumping down a system. You haven’t taken into account the safety aspect and things like that will get people killed. Hence why you shouldn’t be showing it. PS the proper way is to make sure you have a high side gauge hooked up and check to see if all the refrigerant can safely fill the liquid receiver and if not the HP safety to cut it out and how to use an auxiliary bottle to help pump it down.