If you are overcharged, and your receiver is full then you will begin to stack refrigerant in your condenser. Then your compressor will squeal and your head pressure will rise and probably trip on high head or compressor will go off on overload.
I wouldn't even check the suction pressure while your frozen up it's not going to tell you anything without moving air across the coil your not going to get any accurate reading at all
@ Steven @ When is best time to check saturation temperature, what does saturation temp should look like under heavy load and on regular operation, why does saturation change under heavy load or is the saturation tempreture depend on the charge I need some information on this. Thanks
Rookie use insulated screw drivers when working live current.dont give attention to pressures when coil is iced up. But also need to check defrost circuit if its fuctional. Love your work
Rookie Refrigeration, I see you have alot of what we call in my neck of the woods, "Monday morning quarterbacks" in the commemt section of this video. Don't worry about that...Good work getting them up and running safely. Being the on-call technician is alot of responsibility. Sometimes you just have to get a business that's cooling a critical load up through the night following good industry practices. You did that. I know those middle of the night calls very well.
Great video and job. Not tryin to nitpick, I know we all have different ways of doing things but I’m always amazed at how many people don’t weigh in how much they are adding in. I get that u can weigh before and after at truck but I love knowing how much I’ve added so I can’t overcharge and can make sure I add the extra for headmaster/low ambient temps.
Most bigger refrigeration systems cannot be charged by weight therefore you still can over charge a system or have a system be under charged you can only charge by sight glass and head pressure
Yeah bro. I have Not taken a scale to a rooftop in a long time😂. Just my way of doing it. In this case I couldn’t touch the receiver due to it having insulation so I just used my judgment really on how much to add. But I agree bro. Everyone does it differently.
steven siwierka I get that and work on lots of grocery refrigeration . I also work on critically charged topping tables and ice machines. It’s just habit to have scales when recovering or charging no matter size of system.
that middle lug has been overheated bad, contactor is junk and cut the wire back to clean copper or replace the whole section. always replace anything electrical that been overheated, because it's been oxidized and will more resistance causing further overheating. same for new contactor on oxidized wire, it will fail there again.
what do you use to record your videos? do you use a camera or your phone? I just bought a go pro so I can start making my own HVACR videos, just curious as to what your set up is
It’s really just a way of showing you that the receiver is not full and stacking refrigerant in the condenser. If you start to hear that, YOU ARE WAY OVERCHARGED
@@rookierefrigeration4357 Yeah firgured that big of a unit would be a pain. Would it affect the system if you keep having to charge it or its so much gas that it just doesn't matter and youd find the leak and repair? I only work on small stuff like fcbs and ice makers so to see how everyone does it with the bigger stuff is very informative. Keep em' coming! Edit: How many pounds did that hold?
kmerc609 at some point, after much and much fractionating, then you may have a problem. I do agree on that. But not until u start noticing weird pressures/temps.
Bro can you explain the pump down method to check if your overcharge...I've always charge until I don't see bubbles in the sideglass and than check pressure..
If you pump the system down manually and its overcharged, the compressor will not shut off on low pressure cut out due to the system not having enough space in the condenser and receiver to hold the charge.
Juan Todolí I mean make sure it’s not overcharged by exceeding the capacity of the receiver and going off on high head or opening up the internal bypass. Just looking for normally pump down. That’s all
So those contactor terminal maybe not loose. If you didn’t torque them and try tight them again and again they keep squeeze those strain THHN conductors again and again.
I disagree with your diagnosis technique there. You CAN NOT diagnose a system with iced up coils, you’re virtually running the system with no fans and naturally you’re going to get a low saturated-suction pressure.
TheJordanwright I agree. That’s why I Based my diagnosis off of head pressure. The suction pressure was just there to show the effects of low airflow and low charge simultaneously. But you’re correct.
I dont know if this the angle of the camera but I’ve been watching your videos and you keep putting your fingers really close to that 480v!! I’ve been hit by a leg of 480 and has a contactor blow up in my face on a roof at 2am after a 20 hr day burnt the shit out of my hand and face It’s no fun spent 5 days in a burn hospital intensive care unit in pain you can’t describe. Be safe and respect the power.
I'd to thank you for the well explained procedures, for people that understand refrigeration is a great source of help when in doubt
Good stuff, thanks for the ride along.
Suggestion: insulated tools when working hot. Be safe.
Yeah i was thinking the same thing. Cheap insurance.
Very good what degree the room have to be
Can someone explain the pump down check to make sure it isn’t over charged?
If you are overcharged, and your receiver is full then you will begin to stack refrigerant in your condenser. Then your compressor will squeal and your head pressure will rise and probably trip on high head or compressor will go off on overload.
Where pressure to safely pump down a cooler/freezer? Thanks!
Nice find I miss that type of work... But I occasionally do some ice machine and cooler/freezer/ice cream display work
What temp drop is bad for a filter?
Jordan Horvath depends on who you ask. 3° is what I was taught.
But even A 1° drop could be bad.
@@rookierefrigeration4357 good to know thanks👍
I wouldn't even check the suction pressure while your frozen up it's not going to tell you anything without moving air across the coil your not going to get any accurate reading at all
Agreed. Some things I do for the camera.
Rookie Refrigeration is that refrigeration porn then?
@@rookierefrigeration4357 good point bro that is a good answer for new techs .
@ Steven @ When is best time to check saturation temperature, what does saturation temp should look like under heavy load and on regular operation, why does saturation change under heavy load or is the saturation tempreture depend on the charge I need some information on this.
Thanks
is there any traps in the drain lines?could suck in outside air there.
What do those clamps with the green light flashing do?
What the low side pressure should be around on a 20 door reach in cooler 134-a
Cris. G hard to say. I’d say you have to run a 23° coil so translate that into pressure for R134a. About 20psi. Depending on evaporator coil td etc.
Rookie Refrigeration thank you bro
Don't you have to thaw coil before you get pressures,cause pressures won't be right?
What was the name of the service tech app for coolsys?
Rookie use insulated screw drivers when working live current.dont give attention to pressures when coil is iced up. But also need to check defrost circuit if its fuctional. Love your work
Rookie Refrigeration, I see you have alot of what we call in my neck of the woods, "Monday morning quarterbacks" in the commemt section of this video. Don't worry about that...Good work getting them up and running safely. Being the on-call technician is alot of responsibility. Sometimes you just have to get a business that's cooling a critical load up through the night following good industry practices. You did that. I know those middle of the night calls very well.
Thanks man. I know what you mean.
Great video and job. Not tryin to nitpick, I know we all have different ways of doing things but I’m always amazed at how many people don’t weigh in how much they are adding in. I get that u can weigh before and after at truck but I love knowing how much I’ve added so I can’t overcharge and can make sure I add the extra for headmaster/low ambient temps.
Most bigger refrigeration systems cannot be charged by weight therefore you still can over charge a system or have a system be under charged you can only charge by sight glass and head pressure
Yeah bro. I have Not taken a scale to a rooftop in a long time😂. Just my way of doing it. In this case I couldn’t touch the receiver due to it having insulation so I just used my judgment really on how much to add. But I agree bro. Everyone does it differently.
steven siwierka I get that and work on lots of grocery refrigeration . I also work on critically charged topping tables and ice machines. It’s just habit to have scales when recovering or charging no matter size of system.
@@Hvacsteve69 @ impressive
Dryer issues?
Why have a drier at the condensing unit and one at each evaporator? Is that normal?
It is normal at this store. Unfortunately it only causes issues.
Where was the refrigerant leak ?
where do you get those refrig guages from?
United.
that middle lug has been overheated bad, contactor is junk and cut the wire back to clean copper or replace the whole section.
always replace anything electrical that been overheated, because it's been oxidized and will more resistance causing further overheating. same for new contactor on oxidized wire, it will fail there again.
Agreed. Company had another tech complete the call. I left specific instructions on what to change. Including that wire.
Thanks for the advice 😉
what do you use to record your videos? do you use a camera or your phone? I just bought a go pro so I can start making my own HVACR videos, just curious as to what your set up is
BigDog Walkz I just use my iPhone. I’m not a big fan of the GoPro. But I have been meaning to try it.
Good recording @ rookie
Could you explain how a "safe pumpdown" shows no overcharge
It’s really just a way of showing you that the receiver is not full and stacking refrigerant in the condenser. If you start to hear that, YOU ARE WAY OVERCHARGED
Since 404a fractionates did you add the 8lbs then come back, recovery the charge that had the leak and charge it back up with fresh 404a?
Absolutely not. This is the real world. Can you imagine doing that to a rack with 1000lbs. 🤷🏼♂️
@@rookierefrigeration4357 Yeah firgured that big of a unit would be a pain. Would it affect the system if you keep having to charge it or its so much gas that it just doesn't matter and youd find the leak and repair? I only work on small stuff like fcbs and ice makers so to see how everyone does it with the bigger stuff is very informative. Keep em' coming! Edit: How many pounds did that hold?
kmerc609 at some point, after much and much fractionating, then you may have a problem. I do agree on that. But not until u start noticing weird pressures/temps.
Bro can you explain the pump down method to check if your overcharge...I've always charge until I don't see bubbles in the sideglass and than check pressure..
If you pump the system down manually and its overcharged, the compressor will not shut off on low pressure cut out due to the system not having enough space in the condenser and receiver to hold the charge.
Another great video Rookie ... Much appreciated ...
Eddy thanks bro
When you refer to pump down safely, you mean don't exceeding high pressure switch?
Juan Todolí I mean make sure it’s not overcharged by exceeding the capacity of the receiver and going off on high head or opening up the internal bypass. Just looking for normally pump down. That’s all
@@rookierefrigeration4357 That's waht I tried to say. I picked the wrong words (not English speaker) 👍
So those contactor terminal maybe not loose. If you didn’t torque them and try tight them again and again they keep squeeze those strain THHN conductors again and again.
😂😂😂 what kind of drain system did you say that was? I never seen one, lol
Acorn.
I though the liquid line drivers are bad if they have more than a 3 degree temp drop across them
I’ve seen a few that have less than 1° and were plugged. Just really depends. But yes, the rule of thumb is 3°. You are correct.
What about the milk 🍼
#152 thumbs up
Thx for your videos
great video
Thanks
Puro 🤘VAC homie! Another great video!
Thanks bro
I disagree with your diagnosis technique there.
You CAN NOT diagnose a system with iced up coils, you’re virtually running the system with no fans and naturally you’re going to get a low saturated-suction pressure.
TheJordanwright I agree. That’s why I Based my diagnosis off of head pressure. The suction pressure was just there to show the effects of low airflow and low charge simultaneously. But you’re correct.
You can't tell without de-icing it first. The evaporator being unable to absorb heat will have a direct effect on the head pressure.
Bill you don’t say 🙃
Hahaha 🤦🏻♂️🤦🏻♂️🤦🏻♂️🤦🏻♂️
Good job @Rookie refrigeration you showed us pressures before and after the de icing the coils..
Can't wait to see part 2. I'm is a state of suspense :)
May not be a part 2. 😟
@@rookierefrigeration4357 I guess that is a possibility.
Love the great video !
Thanks bro
Good video brother
Thanks
Should’ve shown an after pic on the evap clean up. Next time rookie.
I dont know if this the angle of the camera but I’ve been watching your videos and you keep putting your fingers really close to that 480v!! I’ve been hit by a leg of 480 and has a contactor blow up in my face on a roof at 2am after a 20 hr day burnt the shit out of my hand and face It’s no fun spent 5 days in a burn hospital intensive care unit in pain you can’t describe. Be safe and respect the power.
Sam Pantiliano damn. Maybe it’s the angle cause I’m not touching nothing😂😂😂
Target!
👍👍👍
So your using a non electrical insulated flat head on a live contractor? Not good don’t do this! Haha well done on the rest my friend
Do it all the time. But you're right. Don't do it🤣
Veto SET up New
Nice job. It hurts to read the dumb criticism.
It is what it is bro. They don’t understand that some things I only show for the camera.
That's wrapped
God bless you bro
Rookie
Beast