the reason for regulating the temperature through the LP control was to attempt to prevent the customer from screwing around with it. Lots of times, techs will remove the adjustment knob in a vain attempt to prevent tampering. The way I see it, if they screw up messing with the controls, they have to call you out and you get to bill them for your time. This only backfires if they wait till 3:30 on Friday....
I seen this setup before on an old step in cooler at a chinese restaurant. I had put a JC air coil in place of it and added R417C worked great. First time i saw an LP to control temp. Cool video.
Old school we used these allot, but that was with R-12,22,502. Now refrigerants are blends with some are not quite as stable, so have to do set-up as Dave suggested.Good explanation ; Dave No-Cal~Refer
Good video Dave. In most cases using a pressure control as a temp control on an outdoor condensing unit sucks. Your ambient temp fluctuates it changes your refrigerant pressures then causing your pressure control to cycle. They work good when the condenser is indoors. (Temp controlled environment to maintain a constant ambient temp.
I usually like all the old school stuff but that in particularly I hate they are usually never really accurate and in the winter naturally the adjustment would be off compared to summer so usually I would just tell the customer that I would change it to a thermostat with a solenoid
polishtheturd mickelson u can use whatever u like here even a milk crate. Lol. There is no refrigeration police and I don't stock cinder blocks on the vangina.
LPC switch used for a t-stat only works if you have a non-bleed txv tho...but then again walk in boxes usually are non-bleed and have start components to overcome the stored head pressure. But that's also good info if you come across a walk-in with a bad txv that's running on a temp control with a low pressure cut out...don't put a bleed/equalizing txv on there! Good video
great video Dave I like using that particular low pressure control , and as a universal temperature control I use the Ranco A12-700 and the cut in , and cut outs are at 37 cut in and cut out at 18 psig that works for me A12-700 bad ass tstat ...great video Dave
Like the explanation of how to set up those switches as a thermostat, kind of the same concept the reach ins use with the bulb in the coil, nice and simple. I looked up that app after watching, like the slide option. RSD Notes for those interested.
What P-T CHART APP is that Dave? I’ll look through the other posts. Found it! It’s only on Apple that I can find. The RSD NOTES APP. I downloaded it for my iPad, but don’t have it for my Samsung Galaxy Note 8. Oh well,... On another note 📝,....Those pressure controls always confuse me. Any pointers to make understanding them better would be great. I like what you did, I just gotta watch the vid again to seal it in my brain! 😆. Thanks for posting great usable content,...as usual.
Good stuff bro. I know walk in freezers will use the low pressure cut out as a back up if the thermostat fails but I haven't worked on a walk in where the lps controls the temp. Merry Christmas.
Is it useable on reach-ins, with multiple txv's non ventilated (maybe ventilated to) and only one compressor. I've seen some of these and they never seem to run very good, which annoys me.
good teaching dave, basicly if the unit used LLS,the pressure control used to turn on/off comp on 20 cut in and 5 cut out? thank you and Marry Cristmss
I did work in a restaurant with pressure controls controlling a prep table, walk in, and standard 4 door fridge. No t stat in sight. Have you ever found a leak coming from one of these controls Dave?
Thanks Nor Cal. Thats exactly what i have my line voltage stat set at 55 degrees. Does the condenser come on automatically on pressure? Or do i need to run control voltage to condenser unit contactor to energize the comp contactor? Do i need to add a jumper somewhere in the terminal strip in order to tell condenser im doing a pump down system?
Hey Nor Cal great video man. I currently work on HVAC systems only and i have a job im doing for a very good friend of mine. He has a wine cellar at his house being done and I installed a small ducted fan coil with a refrigeration Tecumseh condenser R404A.The fan coil installation instructions states unit to be set up as a pump down system and This video explained it all. I have a question regarding the cut in/cut out. Do you have an email i can message u?
Jose Alfaro on pump down for R404a set your cut in at 35 Psig. And have it cut out at 5 and you will be good. For wine have your Tstat set around 55-57
DAVE HAVING AN ISSUE WITH A HOSHIZAKI KM SERIES ICE MACHINE 3 BEEPS REPLACED BOARD WATER VALVE AND CLEANED MACHINE AND FLOAT SWITCH STILL BEEPING AND NOTICED LINES FROSTING UP ANY SUGGESTIONS
I like that old school method. Simple and seems to work well.
happy holidays to all the hvac/r techs
this has saved me on late night calls few times in my day also
def
Nice video Dave. Its great to see someone that takes pride in there work :)
Merry Christmas Very good explaining how they did with the pressure control but if you have a blend refrigerant it a lot hard to set .
Edward Hvacr it can be. Merry Christmas 🎄
the reason for regulating the temperature through the LP control was to attempt to prevent the customer from screwing around with it. Lots of times, techs will remove the adjustment knob in a vain attempt to prevent tampering. The way I see it, if they screw up messing with the controls, they have to call you out and you get to bill them for your time. This only backfires if they wait till 3:30 on Friday....
I seen this setup before on an old step in cooler at a chinese restaurant. I had put a JC air coil in place of it and added R417C worked great. First time i saw an LP to control temp. Cool video.
Excellent explanation! Thanks for sharing and keep up the great work
Old school we used these allot, but that was with R-12,22,502. Now refrigerants are blends with some are not quite as stable, so have to do set-up as Dave suggested.Good explanation ; Dave No-Cal~Refer
Alfa Laval used to run their milk tanks off low pressure controls, worked well with R12.
Excellent demonstration Dave
watching some old vids you have some good stuff here
Awesome video thank you very much for your teaching hope you make more of this
I really like the milk crate stand :) Very very good vid Mr. Dave.
Jon HVAC milk create stands are free. Lol
great video and demonstration, I'll be sure to add that to my reputoir. thanks man. have a merry christmas.
gabriel brown merry Christmas
Good video Dave. In most cases using a pressure control as a temp control on an outdoor condensing unit sucks. Your ambient temp fluctuates it changes your refrigerant pressures then causing your pressure control to cycle. They work good when the condenser is indoors. (Temp controlled environment to maintain a constant ambient temp.
Anthony Reardon hvacr yep. On cold mornings they don't start up.
I usually like all the old school stuff but that in particularly I hate they are usually never really accurate and in the winter naturally the adjustment would be off compared to summer so usually I would just tell the customer that I would change it to a thermostat with a solenoid
hardcooling I tried they did not want to spend the $. If it had food in there I would have done it. Just beer 🍻 in there.
here in toronto it's diferent if it was beer they would spend all types of money to make it the best . food .. meh as long as its working .
prime time restaurants spend money on refrigeration in Toronto? Every customer I know wants a deal. Like below a livable wage kinda deal.
Merry Christmas Dave. Great vid. Looking forward to more in the new year.
Rob HVAC merry Christmas Rob
hahaha the milk create! I get a kick out of all of these units you work on. All of the improvised dog houses and stuff are pretty damn funny.
Brad B it's like an island out here. Lol
Never seen a condenser sitting on a milk crate. And never will again lol. Must be a shortage on cinder blocks in California.
polishtheturd mickelson not my install just my repair at customer request. No more cinder blocks here due to earthquakes.
I know it was not your install. Why can't cinder blocks be used in California to support a condenser? I Really want to know, thanks.
polishtheturd mickelson u can use whatever u like here even a milk crate. Lol. There is no refrigeration police and I don't stock cinder blocks on the vangina.
LPC switch used for a t-stat only works if you have a non-bleed txv tho...but then again walk in boxes usually are non-bleed and have start components to overcome the stored head pressure. But that's also good info if you come across a walk-in with a bad txv that's running on a temp control with a low pressure cut out...don't put a bleed/equalizing txv on there! Good video
Great information.
Good walk through brother. Merry Christmas
David Smith merry Christmas 🎄
nice video. thank you , and Merry Christmas
liang sam merry Christmas
You know your chit mate too damn well! Please do a video on how to connect the duel pressure control please on a refrigeration system if possible.
great video Dave I like using that particular low pressure control , and as a universal temperature control I use the Ranco A12-700 and the cut in , and cut outs are at 37 cut in and cut out at 18 psig that works for me A12-700 bad ass tstat ...great video Dave
Felipe Tafolla I use part # 61-030 from RHS 21.00$ just like the A12701.
Nor-Cal Refrigeration & H.V.A.C nice might give it a try ..thanks!
Thank you for the information!!! Merry Christmas !!!
Thanks for the information Dave
Great video Dave!
Have a Merry Christmas brotha!
HVAC in SC merry Christmas
Like the explanation of how to set up those switches as a thermostat, kind of the same concept the reach ins use with the bulb in the coil, nice and simple. I looked up that app after watching, like the slide option. RSD Notes for those interested.
tcpHVAC/R that's my main supply house. Great app has a level too.
I like that spaghetti liquid line and filter drier in the back ground
Merry Christmas!!! Thanks for the information!
G. Salis merry Christmas 🎁🎄
Good stuff Dave
We see. That controls still very interested
It did make sense. Plus, another way to skin a cat is always useful when dealing with machery.
Thanks!
What P-T CHART APP is that Dave? I’ll look through the other posts. Found it! It’s only on Apple that I can find. The RSD NOTES APP. I downloaded it for my iPad, but don’t have it for my Samsung Galaxy Note 8. Oh well,... On another note 📝,....Those pressure controls always confuse me. Any pointers to make understanding them better would be great. I like what you did, I just gotta watch the vid again to seal it in my brain! 😆. Thanks for posting great usable content,...as usual.
Great video thank you. Merry Christmas.
Ron White merry Christmas
Very informative video thanks!
Good stuff bro. I know walk in freezers will use the low pressure cut out as a back up if the thermostat fails but I haven't worked on a walk in where the lps controls the temp. Merry Christmas.
Ulises Palacios merry Christmas 🎄
Thanks! Excellent video.
great vid keep I'm coming have a great new year.
Julio Calvet thank you!
Gracias por hacer eso videos😎
Can I please have that book of setting up pressure switch... I'm bit behind
Love the outro......west cooooaaaast!
Thanks again great video
Lorenzo Ontiveros your welcome
Hey Dave.. The scale showed 36 to 37 psi.. it cut in at 36.2.. Pretty close,Go Johnson
Is it useable on reach-ins, with multiple txv's non ventilated (maybe ventilated to) and only one compressor. I've seen some of these and they never seem to run very good, which annoys me.
Merry Christmas Dave ........
Lloyd .Haight merry Christmas 🎄
My question is if that switch control the solenoid or you installed a tstat to de-energize it and make the system pump down ?
great info Marry Christmas
Martin Gardner merry Christmas
Merry Christmas bro
hardcooling merry Christmas 🎄
Half of the refrigeration at my job is controlled just by low pressure control. I normally set 15 and 35 give or take some controls aren't perfect
Yes sir. ❤️ it
Which app are you using in your mobile for PT chart.
good teaching dave, basicly if the unit used LLS,the pressure control used to turn on/off comp on 20 cut in and 5 cut out? thank you and Marry Cristmss
Nate S yes for 134a
Hey bro . I have same unit . And my cooler is getting freeze few time . Please tell me what shouldi I set up ?
Thanks Dave
Hit the town soul player
This was helpful.
Houzit man which app that you use for pressure switch settings i saw on that video
Send me pls thanks
I did work in a restaurant with pressure controls controlling a prep table, walk in, and standard 4 door fridge. No t stat in sight. Have you ever found a leak coming from one of these controls Dave?
Apprentice Phil yes over time the bellows will leak, cap tubes will rub through.
thank you
i like your videos
i got it on 134a cut out around 1to 3 and cut in 20
Thanks Nor Cal. Thats exactly what i have my line voltage stat set at 55 degrees. Does the condenser come on automatically on pressure? Or do i need to run control voltage to condenser unit contactor to energize the comp contactor? Do i need to add a jumper somewhere in the terminal strip in order to tell condenser im doing a pump down system?
Jose Alfaro your stat needs to energize a liquid line solenoid valve. The psi switch cycles the condensing unit.
Why not set it with nitro before connecting it to the system?
Thanks!
Is the line actually positive or negative
Biggy sez, Happy kwanzaa, nice video quality, what did you use.
muniznick iphone6s +
Hey Nor Cal great video man. I currently work on HVAC systems only and i have a job im doing for a very good friend of mine. He has a wine cellar at his house being done and I installed a small ducted fan coil with a refrigeration Tecumseh condenser R404A.The fan coil installation instructions states unit to be set up as a pump down system and This video explained it all. I have a question regarding the cut in/cut out. Do you have an email i can message u?
Jose Alfaro on pump down for R404a set your cut in at 35 Psig. And have it cut out at 5 and you will be good. For wine have your Tstat set around 55-57
DAVE HAVING AN ISSUE WITH A HOSHIZAKI KM SERIES ICE MACHINE 3 BEEPS REPLACED BOARD WATER VALVE AND CLEANED MACHINE AND FLOAT SWITCH STILL BEEPING AND NOTICED LINES FROSTING UP ANY SUGGESTIONS
tito Arroyo three beeps "freeze time"?
What app do you use for the TP chart?
Pops McCartney that one is on RSD app.
why didn't you offer up installing a thermostat
It has a stay the psi switch is for pump down.
@@NorCal-refrigeration ooooooooo lol i thought you were doin old school temp control by the pressure control!!
can you show me how do you ajust it pressure? i was paid attencion when you said that you goint to ajustet at 17 and them i got lost?
hi thank you
What kind of PT Chart App you have on your phone?
Jose Alfaro it's on RSD app.
🎉
bah humbug but thanks for making videos
anyone has that chart in pdf
Waw
Not accurate at all!! Subject to outside factors..
there never close LMAO