In video I mentioned low pressure cut out was fine at 3-5#. Really you just look at what temp your rack is. if you have + 13 medium Temp Rack r404a would be about 46psi just check PT chart, as long as you set it to cut out below that, and it's low enough for your rack to stage properly you're good to go. It's just for an emergency cut out, not pump down.
Thanks man! There are many ways to do the job, I've been starting to see if I can pump the whole system down. Just need to shut the liquid valve before the filter shell. Have a gauge on the discharge verify your discharge transducer is correct watch your receiver level and discharge pressure make sure it's handling the volume well, sometime the pressure can spike( good time to see if your controls are set right too if that happens) If you pump most the ref into receiver and condenser you can get the liquid out of the filter shell then isolate it. Most of the ref will then be filtered before entering back into the store. You may also see what the suction pressures are at the point the rack shuts down. Many ways to do it be creative. Techs could pull me apart from my vids, they are all raw and on the fly though, I don't even watch half the time before posting.
Great video my friend! Thank you please post more..... So to pump down you isolate the outlet of the receiver correct and then ...? Sorry I'm new to the refrigeration industry I've been doing commercial rooftops and residential for 12 years.
Hey Frank, thanks ! No worries ask questions!With the suction and discharge headers, just treat it as one compressor. If you close the outlet of receiver you'll be filling it. Watch discharge pressure, not all racks can be done like that. Can always isolate and recover if needed.
Good video. I’m three months in the markets after doing industrial ammonia for 15 years. Living the dream👍🏽
Great videos man! I’m still new and trying to soak up all the knowledge I can
In video I mentioned low pressure cut out was fine at 3-5#. Really you just look at what temp your rack is. if you have + 13 medium Temp Rack r404a would be about 46psi just check PT chart, as long as you set it to cut out below that, and it's low enough for your rack to stage properly you're good to go. It's just for an emergency cut out, not pump down.
excellent video
Thanks Simo!
I did try to adjust the mechanical low pressure switch, it would not shut down rack, I will be returning with a new one.
That’s either a Walmart or sams club my guess. What company do you work for?
you don’t pull vac after new filters and just purge?
I often do use the vacuum, but I also sometimes just purge.
👍
Thanks man! There are many ways to do the job, I've been starting to see if I can pump the whole system down. Just need to shut the liquid valve before the filter shell. Have a gauge on the discharge verify your discharge transducer is correct watch your receiver level and discharge pressure make sure it's handling the volume well, sometime the pressure can spike( good time to see if your controls are set right too if that happens) If you pump most the ref into receiver and condenser you can get the liquid out of the filter shell then isolate it. Most of the ref will then be filtered before entering back into the store. You may also see what the suction pressures are at the point the rack shuts down.
Many ways to do it be creative. Techs could pull me apart from my vids, they are all raw and on the fly though, I don't even watch half the time before posting.
@@stevep3089 you’re welcome .
We all can learn from each other most of the time it’s those super techs that have negative comments
Great video my friend! Thank you please post more..... So to pump down you isolate the outlet of the receiver correct and then
...? Sorry I'm new to the refrigeration industry I've been doing commercial rooftops and residential for 12 years.
Hey Frank, thanks ! No worries ask questions!With the suction and discharge headers, just treat it as one compressor. If you close the outlet of receiver you'll be filling it. Watch discharge pressure, not all racks can be done like that. Can always isolate and recover if needed.