Pressure controls . How to set them and how they work .
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- เผยแพร่เมื่อ 10 มี.ค. 2020
- Description of a pressure control and how to set them and how they work .
Thanks for watching . Check out my older vids and playlists everyone for vids you may have missed .
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Some pro tips: (1) A scroll compressor is still a hermetic compressor. (2) Don't trust the numbers you set the control to. (3) Set up the low pressure control settings in your van with nitrogen and a swivel tee. Saves the compressor some stress. Saves you and the customer time as well. (4) I agree, the manual high pressure reset is the way to go if it's responsible for cycling a compressor. (5) Be clean with your capillary tube routing, don't let them rub against things, and ensure they are routed as to not let oil pool in them. (6) ALWAYS LEAK CHECK THEM. The low pressure diaphragm is prone to leaking, especially on Johnson brand controls. (7) For everyone's sake, don't over torque the flare fittings...
How do i charge freon to a scroll
compressor.
Can u explain
@@alfonsokumangai4002. Just the same as you would charge any system
Thank you Chris I have been in the trade for 20 yrs and just started doing refrigeration a year ago and your videos help and I thank you for this!!!! Don't work to hard.
Great job on the videos. Education is the key in today's trade. Thanks kid keep on HVACR!!!
Really good video Chris, Nice to see you back at it, thanks for sharing
Awesome video, as always.
Looking forward the next one😊
Thank you 🙏🏻 for the videos Helps a lot
Cheers Pal. Much Appreciate. Regards from London
Very informative man..good job!!
Tech out of south Florida here. This video helped big time. Thank you
Glad it could help man 👍
So clear explanation, appreciate pro!
Good video! Thanks for the tips!
Thank you , great help!
Love the video!
U doing great work thank you keep continue it
Good Stuff CSC . I remember attending to a seminar , when Copeland scrolls fist came out , were mainly installed on AC units . The instructor mentioned that is not good to pump them down below 17 Psig . Now that I see them in refrigeration units I pump them as low as 19-20 psig . Good stuff man .
Good video Chris
very nice informative thanks 👌
Great video man! Always good to get a refresher on the various types of parts we run into.
Very helpful
The man right here
Thanks man
Depend on where the unit install too? My area temp go down below 20 or more so gotta set low. Thank you very much
You r the man
Thanks man. Appreciate that 👍
good info
Keep the videos coming bud!! There great. Really interested to here more about like truck stock and truck setup for the changing seasons or do you keep them all the same?
Adam Neil we pretty much keep the truck stock the same year round
Question: I have a Copland Copeland EALA-0200-1AC compressor. What do recommend I se the dial pressure sensor at for both high and low pressure?
this might be a lot to ask but this would be super beneficial to me and probably a lot other new guys
1. SC/SH and typical pressures to look for in a normally function WIC/WIF
2. (this might be a pain) but draw out an electrical diagram of a refrigeration system with all the most common parts and how they're wired.
3. and could you make a video of your typical diagnostic steps when you come across a unit not working? ex: step 1, visual inspections on the coil, step 2 check fans
4. and can you make a video for your step by step maintenance CC on a refrigeration system?
Thank you for these videos. seriously. great job and i love your patience
Brian Pan yes I can certainly do that. If you look through my older vids I have some I’m these things. But I can try to get something out for you guys. It may be a talking vid , especially about the steps I take when approaching a call
@@Cscrefandhvac that's totally fine as well. Sorry but can u also add what typical saturation temps are supposed to be? Suction line temps? And psi for 404a and r22
I'll look deeper into your older videos
Brian Pan all those temps can vary depending on the system , the pipe run etc
What can you tell me about an Emerson digital control on a copeland compressor, i’m dealing with a high pressure switch issue and how to set the cut in and cut out
there's a screw type cutout stop control next the dial, did you have to adjust this at all or was the thermostat ready out of the box? thanks!
What about setting LPC as a temp control, for the younger tech's out there
I got ranco dual pressure control in my open daily case
But my compressor keep turns on and off so what should I do
Can you do a fan cycling control, based off what I know in a two fan condensing unit you’re only wiring one fan which would be your fan closest to the inlet of the condenser. But as far as setting the switch what am I doing just setting pressure cutting out closest to pressure similar to 30 degrees over my ambient in colder ambient temps. Great vids keep me coming.
jon umana yes they are set the same way just at a higher pressure
very help,,,would show some wiring stuffs,,thanks
That stores the refrigerant in the reciever?
Nice video, I just can’t picture how the differential adjustment actually lowers the cut out pressure
great video as always , have u used 448 freon are the pressures the same as 22 ? thank you for ur time sir
507c is the closest to r22
Also showing how you would set and alter sub cooling and superheats a bit more in depth would be great. 👍
Adam Neil yes I’ll try to do that. That’s something I’d like to get video of in the field for sure 👍
CSC Refrigeration and Hvac brilliant il look forward to your next video. Keep it up bud. also love the non field stuff.
Adam Neil thanks man glad you like the vids
@@Cscrefandhvac sir plz can i ask you a question about wiring control of a chilled room i need schematic diagram for wiring control plz
I'm in Canada and we get temperatures as low as -20f. So if I was to set a 404a scroll compressor system to cut in at 40 - 45 psi with a cutout at 15 psi, would that not likely be enough to cut in when the solenoid opens? If I have a freezer at -4f and my outdoor ambient is somewhere in the -10f to -20f at night, is it not going to be enough pressure to kick it back on?
It could be for sure. We get cold winters here but not as cold like you do at all amd I’ve had units here that would not get close to 45. You will have to lower that and lower the cut out
Thanks for the info.
I take it there is no way tool adjust differential setting on the high side? Factory set?
On this particular control and most they are factory set. The differential adjustment is used on a condenser fan cycling control always .
The main reason you want the scroll to stop pumping down around 15psi is to not send too much liquid through the scroll at the top of the compressor. It’ll damage and ruin the scroll compressor.
Got a single unit started kicking on and off. I adjusted for longer time but next day doing again? Do they go bad or do you think gas low? Fridge is cold.
What kind of system and compressor is it ?
@@Cscrefandhvac found leak
That is a thread on unit. To change out the braze in's, do you have to evacuate the system? Or can you just swap the cap lines attached to the bottom of the switch
You have to evacuate and use the new cap tubes that are on the new switch .
Also some switches have threaded connections but these particular ones in the video do not
@Cscrefandhvac Thanks, I appreciateit!
I was able to adjust the unit and is now working properly
If it fails completely, I'll probably use the "peanut" screw on type Lo pressuse cut-out control switch mounted of a brass T
Thanks again
Hey don’t know anything on refrigeration but I was give a industrial low boy cooler with this Ranco brand but exact looking device so what do I set the high pressure at
It depends what type of refrigerant is in the system
It’s would depend what type of refrigerant is in the system
👍👍👍
Harry Dickson thanks
Harry
How does a H.P control, control an extra fan ????
Hey there, is this part plug and play? I'm new to this but I do have this new part to install. Someone checked the old one and it's bad. Do I need to remove refrigerant from compressor? Thanks
Well you will have to put o the system down to hook up the low side and if it’s a dual pressure control or high side control you will have to remove refrigerant depending where it goes. It it’s in the discharge line you’ll have to recover some gas most likely but if it’s on the liquid side you should be able to pump it down
@@Cscrefandhvac thanks for you help...
Yho busy with a revamp. Now i can set it and leave
The connection of current????
Excellent please next time adjust in front the camera some people learn watching they don't listen thanks very helpf6
Just some video ideas for you 👍
if the system has an oil safety control i always set the LPC at 10 psi cut out
kingofthecrease30 good point but the oil controls have a delay to make up for the pump down time
@@Cscrefandhvac yes...its 2 min but sometimes large systems take longer to pump down...i have seen it before
kingofthecrease30 absolutely. That’s why I always check pumpdown and make sure the control is set accordingly
Good video but will be better if u mentioned how to test it to find out its faild....thank you
If it’s failed it will be either stuck open or closed . Or the springs will wear out and it won’t calibrate correctly to sense the correct pressure. Or they can leak inside in the bellows or cap tube will break , leak or get clogged
Are you working on freezers only? These pressures would not work on a fridge or any refrigerant.
I was just doing this as an example of how to set them
Good video, I dont know your name .
XRAY Bravo hahahah. I’m Chris man 👍
what about electricity
Cancel my bad I watched the video again