A hands on demonstration of how to adjust a pressure switch for commercial refrigeration.
Пікірлер: 81
@antaimoses2456 Жыл бұрын
Thank you for keeping us old-hands grounded in the basics. Always good to do that from time to time
@decoymanic36783 жыл бұрын
Perfect explaination . most of the time we no need adjust the differential of the pressure switch , just get the cut in pressure will do . and most people don't know actually the pressure switch it's just like our car , you not necessary to hit all the gas , just set higher than other equipment if you need to set primary ( jockey ) , secondary ( duty ) or 3rd cut in equipment (standby ) etc..
@Mgear12174 жыл бұрын
Great video. Thank you for showing us.
@terrygrant81262 жыл бұрын
Thanks friend!.....That Helped me out!
@DisshaArt4 жыл бұрын
Sir great information which you provided us.thanks for it.
@reza493636 жыл бұрын
Very nice video, this way is much easier that after installing the pressure switch thank you... Good job
@frederickrigby98893 жыл бұрын
Great video
@msmail8133 Жыл бұрын
Very informative
@gelvosky7 жыл бұрын
very good explication, the chile instruments tech we appreciate it!
@abhishekpandeyee4 жыл бұрын
Very well explained, thanks
@SABIRALI-gf3fv5 жыл бұрын
Thank you for your time.
@dwarakamayienterprises44686 жыл бұрын
Thanks for the excellent explanation - from India
@cezartech1123 жыл бұрын
Thanks
@outdoorsadrenaline5 жыл бұрын
Great video sir! Very helpful!
@hennietraut80123 жыл бұрын
Thank you very good explanation
@crookedeyetommymarsh12383 жыл бұрын
Thank you!!! Much Appreciated
@syedbasheer82103 жыл бұрын
Thank u...
@nadarajahsivalingam26658 жыл бұрын
Your video is very interesting. keep it up.
@laszlobernath53444 жыл бұрын
Thank you for the tip. However, my switch adjustment screws have a safety lock. Soon is I remove the locking plate, I was able to adjust the pressure.
@JDNelRefrigeration4 жыл бұрын
Danfoss tends to do that
@leonkruger69645 жыл бұрын
Goeie video. Baie dankie.
@user-dd6eb9bo8rАй бұрын
So thnxs
@sunildwivedi93086 жыл бұрын
Very good explanation.
@melusingcobo17353 жыл бұрын
Thanks for your help i appreciate it
@neptuneappliancerefrigerat99023 жыл бұрын
super
@subramaniankrishnakumar38215 жыл бұрын
Thank you gentlemen
@arhonberdich7 жыл бұрын
Thanks, from João Pessoa, Brazil.
@bakersamuel41655 жыл бұрын
Thanks
@mumtazahmeed87467 жыл бұрын
every good explanation sir thanks you sir
@mndubey1117 жыл бұрын
thanks dost, really helpful...
@melusingcobo17353 жыл бұрын
Yes MR J iwas gonna ask you as a qualified refrigeration mechanic on that same question ive asked you what if there is no thermostat at all can i use the low pressure switch to maintain that inside temperature and compare my pressures to my degrees celcius or Fahrenheit just to clear that im new on this field im stil learning iwill be doing my big course soon .im saving money for my trade but ido have the basics as well
@JDNelRefrigeration3 жыл бұрын
Yes you can use a low pressure switch, Good luck with your course.
@namphan43986 жыл бұрын
Thank you, sir
@ahmadalokozay46133 ай бұрын
Thank you for the video, would you tell me that when the pressure reaches the threshold e.g 75 and the switch trips, The compressor gets off?? and what happens to the pressure. does it increases or decreases. I have "Johnson Controls P77AAW-9350" pressure switch installed on outdoor unit (condnsor) but i dont't know how to adjust it. kindly guide me @JDNelRefrigeration
@JDNelRefrigeration2 ай бұрын
The colder your fridge the lower the pressure. The warmer your fridge the higher the pressure. Different gasses work at different pressures. There are 2 ways to find out what pressure to adjust your pressure to, to make your fridge function optimal. 1. If you know what gas your fridge operates on, you can find the pressure and temperature equivilent online. 2. Bypass the pressure switch so that your compressor runs continuously , put a thermometer in your fridge and monitor the temperature. If you reach your desired temperature make a note of your gas pressure. Switch the compressor off. When your fridge has warmed up to the temperature that you want it to start up at make a note of the gas pressure. Now you have your 2 pressures to adjust your pressure switch.
@SteveWrightNZ5 жыл бұрын
Thank you
@Lalthlengliana.Khawlhring6 жыл бұрын
Very helpful.
@safir4s225 жыл бұрын
Amazing
@kasra5556 жыл бұрын
Seems you got good experience but you should have done it with OFN not refrigerant. Please correct your video as we can not release refrigerant.
@andrsram734 жыл бұрын
Do you have normally open and normally closed contacts that are exchanged according to the pressure in the system?
@JDNelRefrigeration4 жыл бұрын
Yes you do get pressure switches that are manufactured with normally open and normally closed contacts.
@alyssonmonica7 жыл бұрын
thanks for the information, what is the appropriate pressure for a walk-in refrigerator and walk-in freezer?
@JDNelRefrigeration7 жыл бұрын
It depends on what type of gas you use and what type of temperatures you require.
@dhrupadsaha41715 жыл бұрын
🙏🙏❤️
@zakir1985ful6 жыл бұрын
Good explained
@kajodram73176 жыл бұрын
za ok ijrutjf
@johnmiller1027 жыл бұрын
How would you go about adjusting when it is already installed on the refrigerator? Same process but using the compressor to add pressure to the switch?
@JDNelRefrigeration7 жыл бұрын
On some of the compressors you have a service valve with 2 connections and on some of them the pressure switch is mounted to one of the 2connections. If so put your gauge on the 2nd connection and close the service valve but not all the way. Once the compressor starts up the suction pressure will drop very quickly because of the service valve being almost closed and it's easy to see the lower pressure that way. While the compressor is off the pressure will increase then you will just have to wait for the pressure to increase to check the higher pressure setting on your pressure switch.
@johnmiller1027 жыл бұрын
ok. Thank you very much for your quick response and great description. I believe that is what I have. I will give it a try next week and see how it goes..
@azmatjanjua57355 жыл бұрын
You need to have a Test Gauge to set a pressure switch the gauge under use is not calibrated having no validation for accuracy tag on it. Second thing is always set operating pressure with all pressure released. Each time you test start from Zero pressure to desired/ trip pressure and always make settings with out pressure. Use Air as media for setting and not Cylider gas as a media. Ihope you will add my comments please to your method.
@tonyp60888 ай бұрын
You are correct except for the suggestion to use air as the pressure media. Air is full of moisture and can contaminate the system. Nitrogen would be the correct choice
@somunnavuie91676 жыл бұрын
Thank you sir
@janibashamolla5 жыл бұрын
Thank you sir.....
@melusingcobo17353 жыл бұрын
Hi sir i have a question for you im littlebit lost .so if temperature decreases is it decreases on the pressure gauge too can you clearify me on that .because sometimes youwill find that the suction is low not because of the shord of gas please if you find this
@JDNelRefrigeration3 жыл бұрын
A pressure switch is used on a system which has an expansion valve and a receiver tank. Systems with capillarys do not use pressure switches.
@mkilickap7 жыл бұрын
perfect
@mozestamarapalli19344 жыл бұрын
Please tell me how to use lp and hp switches in cold room electrical connection
@JDNelRefrigeration4 жыл бұрын
You break the compressor or the relay that controls the compressor through the switch in the pressure switch.
@samierlevy468324 күн бұрын
Jd can you assist me with R22 refrigerant cut in 6 degrees cut out 4 degrees the range an differential settings please
@JDNelRefrigeration23 күн бұрын
I need to know what type of refrigerator this is for? And does the evaporator coil have to defrost all the ice each cycle?
@rafayshaikh81836 жыл бұрын
Can i adjust water pressure on that switch??
@JDNelRefrigeration6 жыл бұрын
That switch is designed for gas. There are water pressure switches that are designed for water. Rather use the correct pressure switch.
@esheynarbhu93304 жыл бұрын
Sir what is problem for my pressure pump my pressure pump is not stop automatically
@JDNelRefrigeration4 жыл бұрын
To test whether the pressure switch is the problem disconnect one of the terminals from the switch and see whether your pressure pump stops.
@ahmednoushadgijoni31787 жыл бұрын
nice
@delroynoble12302 жыл бұрын
What's the setting on the pressure switch for 134a , 17/35 or ?
@JDNelRefrigeration2 жыл бұрын
It depends on what temperature you want & how long of a defrost period you want. For a normal cold room I use cut in 38psi, cut out 12psi
@jimdefilippis96302 жыл бұрын
@@JDNelRefrigeration Should that not be cut in at 38 psi and cut off at 12 psi or am I missing something. Good video, I never seen a pressure switch adjusted like that with a refrigerant tank.
@JDNelRefrigeration2 жыл бұрын
@@jimdefilippis9630 yes you are right
@samnicholas1617 жыл бұрын
Does this turn on at high pressure and off at low pressure?
@JDNelRefrigeration7 жыл бұрын
It depends on how you wire the connections. This pressure switch can be wired either way.
@samnicholas1617 жыл бұрын
thank you.
@xolanimncube84022 жыл бұрын
How do you wire a pressure switch?
@JDNelRefrigeration2 жыл бұрын
On a pressure switch there are 3 contacts which comes from a switch that has a common connection a normally open and normally closed connection. You normally put the AC power on the common connection. On the normally open connection you connect your compressor and the normally closed you can connect a crank case heater or a pilot light which is optional.
@kavatishashikumar24146 жыл бұрын
Nice..Ur demonetisation
@leonardi-bn27345 жыл бұрын
O
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