These kind of videos, with demonstration of actual diagnostic skills, are a breath of fresh air here on UA-cam. Especially in the automotive field, all kinds of people swap parts blindly without even understanding basics.
Good job little brother your bitter thank 3/4 of the guys out there the secret to the trade is attention to detail read the manuals take care of your health and family first and never I mean never stop learning there is always more. This is the secret to more money and knowledge in this trade. Good luck to you.
hi great video what do u use to set cut in cut out on pressure switches ( how do u know the cut in should be 25 and cut out 5 )i am new to the refrigeration field
Most of the time a low pressure switch is designed to simply shut off the condensing unit once it finishes pumping down after a run cycle and thus the exact pressure settings are not very critical. Typically units will be set to cut out slightly above zero (5psi or so) and cut in 10psi above that (25psi). You just need to make sure that the cut in pressure is low enough that it will come on in relation to the VSAT of the refrigerant being used. In other systems the low pressure switch may just be used to protect against a low refrigerant/leak condition where the system does not normally pump down but protection for the above condition is desired. The third way they are used is in old systems that use the pressure switch to control the actual temperature of the cooler/freezer. In that case the pressure settings are very critical to align with the corresponding VSAT to make sure that the temperature is set correctly. That last option is very rare so you likely won't see that too often. Hope that makes a little bit of sense at least. Blessings to you and yours!
Thank you for the video on how the setup works. I have a refrigerating unit in my food truck that was not up to par today as it was our first use in some heat. I am curious if you could provide a good setup for my refrigerating unit using an older Ranco single pressure controller? I know nothing about this stuff but would like to make some adjustments to see if it will work properly. The Ranco has PSI on the left from 10 to 40 at the top, right side has 0 at the top and 100 at the bottom. Hard to read so I hope this is correct. Any suggestions would be greatly appreciated.
Voltage doesn't diminish with multiple paths. It's the same voltage across parallel paths. So even if the switch had continuity, you would have read the same voltage.
Sir g With respect I have window AC Replaced new semi harmitc compress ... But on the suction line and one compressor comming ice Pls reply what is the reason Suction pressure is 55 And discharge pressure is 260 Thanks Long life w love and piece
Awesome...Im working on a 404a system rail/freezer up top and cooler below...So on pumpdowns, my lp switch does not cut out the comp and fan...Run into a vacumn until solenoid kicks back on...
The T-Stat should close the liquid line solenoid. with the solenoid closed the refrig should pump down into the condenser or receiver. the compressor will stay on until the cut-out pressure on the lp is reached. Now the compressor should shut-off. Check your cut out pressure on the lp. Hope this helps.
gearhead0800..Yep thanks a lot.Come to find out someone had jumpered the lp switch and so it ran all the time...Soon as i fixed that, the unit ran like you described,pump down and shut off at cut out....Unit has a freezer on top and cooler on bottom, two solenoids.One low temp solenoid and the other a higher temp solenoid...Appreciate your help very much.
gearhead0800..Yep thanks a lot.Come to find out someone had jumpered the lp switch and so it ran all the time...Soon as i fixed that, the unit ran like you described,pump down and shut off at cut out....Unit has a freezer on top and cooler on bottom, two solenoids.One low temp solenoid and the other a higher temp solenoid...Appreciate your help very much.
Mahu J if the compressor not pump down if you gotta replaced the solenoid may be stay open after thermostat stop calling for cooling . If that not works you have issue with the compressor internal valves not compress not right eventually when compressor over heat it will stop working cause over load it will open after cooling down if will start it shelf till died .
These kind of videos, with demonstration of actual diagnostic skills, are a breath of fresh air here on UA-cam. Especially in the automotive field, all kinds of people swap parts blindly without even understanding basics.
I'm just getting into HVAC, got an apprenticeship. I can tell your vids are going to be a big help! Thanks!
Working on a furnace for the first time, and this was very easy to follow and heats on again. Thank you!
BANJA YOUR GOOD keep like that,your explanation is 200% better that any in you tube
Field piece makes great tools . Great work, man.
Nice manifold! Those are around $800 from what I’ve seen! That’s awesome
Good job little brother your bitter thank 3/4 of the guys out there the secret to the trade is attention to detail read the manuals take care of your health and family first and never I mean never stop learning there is always more. This is the secret to more money and knowledge in this trade. Good luck to you.
hi great video what do u use to set cut in cut out on pressure switches ( how do u know the cut in should be 25 and cut out 5 )i am new to the refrigeration field
Most of the time a low pressure switch is designed to simply shut off the condensing unit once it finishes pumping down after a run cycle and thus the exact pressure settings are not very critical. Typically units will be set to cut out slightly above zero (5psi or so) and cut in 10psi above that (25psi). You just need to make sure that the cut in pressure is low enough that it will come on in relation to the VSAT of the refrigerant being used.
In other systems the low pressure switch may just be used to protect against a low refrigerant/leak condition where the system does not normally pump down but protection for the above condition is desired.
The third way they are used is in old systems that use the pressure switch to control the actual temperature of the cooler/freezer. In that case the pressure settings are very critical to align with the corresponding VSAT to make sure that the temperature is set correctly.
That last option is very rare so you likely won't see that too often.
Hope that makes a little bit of sense at least.
Blessings to you and yours!
Thank you for the video on how the setup works. I have a refrigerating unit in my food truck that was not up to par today as it was our first use in some heat. I am curious if you could provide a good setup for my refrigerating unit using an older Ranco single pressure controller? I know nothing about this stuff but would like to make some adjustments to see if it will work properly. The Ranco has PSI on the left from 10 to 40 at the top, right side has 0 at the top and 100 at the bottom. Hard to read so I hope this is correct. Any suggestions would be greatly appreciated.
Hi I like your troubleshooting videos, if you can put video about compressor overload protection sometime, thank you
Voltage doesn't diminish with multiple paths. It's the same voltage across parallel paths. So even if the switch had continuity, you would have read the same voltage.
Use a jumper across the press. sw. Terrminals...... then turn on the power.
Sir g
With respect
I have window AC
Replaced new semi harmitc compress ...
But on the suction line and one compressor comming ice
Pls reply what is the reason
Suction pressure is 55
And discharge pressure is 260
Thanks
Long life w love and piece
Good job 👍
Very good presentation but I want to know what is the refrigeration type you work on? Is it R-404A or R-134a?
Says 404a on the cover that he showed next to the caps
is it a medium temperature application or low temperature application? Please clarify.
Thanks for the video =)
Can you tell me where do the electrical wires from the low pressure connect to break power. Thanks
Good man...
If the refrigerant type is R-404A why its cut-in pressure set to 15 psig and Diff. to 10. I could not get this setting for R-404A.
Great video!
How do you bypass 1 pressure switch on a ruud condenser.
Anyone know what the cause of a low pressure message on a Thermoflex Chiller. Could it be a pressure probe problem? How can I make diagnosis?
Awesome...Im working on a 404a system rail/freezer up top and cooler below...So on pumpdowns, my lp switch does not cut out the comp and fan...Run into a vacumn until solenoid kicks back on...
The T-Stat should close the liquid line solenoid. with the solenoid closed the refrig should pump down into the condenser or receiver. the compressor will stay on until the cut-out pressure on the lp is reached. Now the compressor should shut-off. Check your cut out pressure on the lp. Hope this helps.
gearhead0800..Yep thanks a lot.Come to find out someone had jumpered the lp switch and so it ran all the time...Soon as i fixed that, the unit ran like you described,pump down and shut off at cut out....Unit has a freezer on top and cooler on bottom, two solenoids.One low temp solenoid and the other a higher temp solenoid...Appreciate your help very much.
gearhead0800..Yep thanks a lot.Come to find out someone had jumpered the lp switch and so it ran all the time...Soon as i fixed that, the unit ran like you described,pump down and shut off at cut out....Unit has a freezer on top and cooler on bottom, two solenoids.One low temp solenoid and the other a higher temp solenoid...Appreciate your help very much.
Mahu J if the compressor not pump down if you gotta replaced the solenoid may be stay open after thermostat stop calling for cooling .
If that not works you have issue with the compressor internal valves not compress not right eventually when compressor over heat it will stop working cause over load it will open after cooling down if will start it shelf till died .
good job
Compressor in the basement?