How to Measure Vacuum Pressure?
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- Опубликовано: 18 дек 2022
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Thank you for not just sharing knowledge, but moving it right along so we don't watch 15 min of video to get it. Thanks again!
You're welcome
I like the short videos 📹 ☺️
Exactly
👍It’s good to see a well trained specialist in the field. I had to use old school water column, inches of vacuum, water FILLED tube gauge manometer 🤣🤣GOOD STUFF my man! Making the big bucks always feels good🇺🇸My goofy neighbor once saw my pay stub lying on my garage workbench after I just got home from work. He couldn’t believe the $$$$ out there for a seasoned refrigeration HVAC dude.
My college educated relatives hate me because I make 2-3 times what they make. I took a year and a half of chemistry, but was offered a job as a service technician making more than I would have in chemistry.
@@michaelmckenna9022👍🇺🇸
We just use our tongue if it sticks your golden!😂
@@peterdarlington4117 👍🤣🤣
Love your content Mate! Has helped me tremendously
I looked at the same reading in both cases.
Yes, I replayed and saw the same reading. What’s up with that?
Put on positive side and turn blower on to see if you have cracks or holes in heat exchanger .
What would indicate compromise in the WC reading?
I seriously need your email to send you my co worker's picture, you guys are twins. Funny how you 2 are in hvac.
Here do it
Yes please
tadfuller1@gmail.com
I've done installs for 12 years and service work for the last 4. It's nice to see technicians take the time to explain what's going on. On a side note I have my grand pops old graduated cylinder ( thinks the name of it. But you will the glass tube with water then attach a tube the same way and measure the difference in water hight then do the math to come up with the same thing just takes about 20 minutes longer to get the same answer
that old fashion U-tube was also used to measure gas pressure in inches of water column. You just have to do the math to convert it to inches of mercury for vacuum.
IT’s December and we need those tips for heating season! 👍thank you for sharing your knowledge
You're welcome
thank you for watching my friend
Love the fix and love the noise of cleaning lol good content Taddy.
We are headed towards first heat startup season, lets see how many pressure switch open issues we get this year.
Brother Taddy this is awesome
I’ve seen this a few times on LENNOX RTUs - wasps get inside during the summer and plug that port with nest!
You and your fancy smancy tools! I was always taught just to stick your tongue on it, if it sticks your good!😂
😁
Very common problem with dirt in the carburetor! Especially when the gas valve won't open & fire. Typical with older units.
Why was the pressure at 1.1 then it dropped to 1.0 after you cleaned?
I was thinking the same thing pretty much. It had a better vacuum before he “cleaned” it. 🤷🏼
He ran the wire into the fan blades so it works great 👍
@@r.h.b.4980 😂🤣
T stat wire works every time.
Thank you. Please make more videos like this
You got it!
Best in the field
Should tee it in. Way more accurate.
Great idea Thank you 😊
Actually not. Better to test inducer first. If u have cracked tubing or other issues tee in will not help much. Really common for crap / rust in inducer port. Better to get a baseline inducer reading for start then tee in & check pressure switch value.
Excellent I love this
2 different perspectives and perspective drives performance I love it thank you so much for sharing this information
maintenence
Thank you
You're welcome my brother. I'm glad this helped
Thank you for watching the video
YOU'RE THE MAN!
Thanks bro…. Just checked mine!
Nice Bro
Great job 👏 👍
Make sure you have a working manometer ,is the answer .😂
Good job
Thank you Tad 🙏🙏🙏
You are very welcome
Good job Bro
thank you 😊
❤Excellent work ❤
Thank you! Cheers!
Your manometer can test pressure switches without running the inducer. The middle tube port on top connects to the monometer's pump. It also has 2 lead connections on top to connect to the PS terminals. You can manually increase the pump vacuum to verify if the PS is closing at the correct suction it's rated for.
Good tip!
Not necessary if the switch won't close. I just suck on it to see if it works. I don't need no stinking manometer.
Vacuum pressure is very slight, a fraction of even 1/10 th " W.C., And... sometimes 2 or 3 switches at different miniscule vacuums for high& low fire. Then it may make sense to use a multiple port manometer. Even then, it may be inconclusive. Something else doing it.
@deanburke3041 the tool creates the vacuum and increases by 1/100 wc. Then you can tell if your switch is or isn't closing (and reopening) at the designed vacuum for that specific switch. Using your mouth can potentially damage a good switch.
@@Cavett24 I don't suck too much, so it's never a problem. I even give demonstrations for show & tell to the customer.
It’s not mentioned, but the reason why the PS wouldn’t close the first time even though similar negative pressure was observed both times is… the PS is vented. You need to overcome the pressure rating as well as having enough air flow volume. Using a tee fitting and leaving the PS connected would show a drastic result and exactly why the switch wouldn’t close originally with a restriction at the draft inducer port. 👍
Absolutely correct thank you so much for adding this information
I keep a small alken wrench in my bag for this
Nice
Thanks
Hell yeah!
Little confused, you were reading positive pressure b4 and after cleaning the port? Shouldn't it have been negative pressure reading after you cleared the clog ? Or did I not see that on your manometer?
Is there a specific pressure measurement reading, like a rule of thumb kinda thing..or reading gas pressure is enough to confirm that the gas valve is receiving gas?
💯
pressure switch hole clogged.
Manarmana...do dooo do do da
Mah Na Mah Na meter......
Never knew The Muppets were into HVAC.
My manometer is old school water filled
Grab yourself an arzel pressure hose T, then attach that to the end of the manometer tube, attach 1 additional hose to the T, leaving 1 exposed port on the T itself. Take the hose from your pressure switch and connect it to the last open port on the T. Depending on negative or positive pressure you are now able to measure draft while everything is running. Not talking shit on what he’s doing. Just letting everyone know there’s another way
Very good knowledge man
thank you so much for sharing this
This manometer actually comes with a T I believe. Looks more like a Y but it’s the same thing lol.
I'm going to pretend I didn't see this video. But If I hear the words
" vacuum pressure " again, ......
If you were pulling a car with a rope, you would not say you are pushing it.
If you we pushing a car, you would not say you are pulling it.
Same thing.
Vacuum pulls , pressure pushes.
There for pressure and vacuum are two different things. In fact they are even measured by two different scales.
Inches of mercury , and pounds per square inch.
Don't be too hard on me buddy you're friend online means well
And what measurement should you get on the inducer motor?
It’s a measurement of negative pressure, most people take the measurement in inches of water column
So you leave the trash in there to stop up again? Nice job security 👍
😆 😂 😆
With a manometer.
Tad, can you damage a pressure switch by cleaning out the ports with a.. shop vac? Asking for a friend 😅
lol hahaha 😆 😂
Don't
I'm confused, how come it was showing positive pressure? And was the pressure switch set at 0.2? Should this have been more than enough to work?
negative pressure
@@TaddyDigest sorry I'm just starting out in trade. So your saying that 1 inwc was actually -1inwc?
Thanks that will be 299 please.
😆 😂
Was the pressure not lower after you removed that debris lol?
yes
What causes it to clog and is there a way to prevent it?
absolutely nothing you can do, builds sediment from outside air
I’ve seen a flying insect called mud dobbers plug them up
Vacuum or pressure?
As you shove the tstat wire too far into the port...
Don't you have to bypass the pressure switch? Or else it cycles.
What if pressure switch is closing and igniter doesnt ignite and gas doesnt come on?
Check the other safeties
If it’s not a safety then check if the board is sending power to the igniter. If it is then it’s the igniter if it’s not then it’s your board. Most boards have a code led light that’ll tell you what’s up
A quick $225
Vacuum is measured in inches of mercury (in/hg), not pressure
It's called a pressure switch
So when I refer to measuring the vacuum
I always say vacuum pressure or pressure
Thanks for watching
You are correct by the way
You can measure a vacuum in many ways. Inches of mercury is the least accurate way. Most measurements of a vacuums are done in microns, torr, and bar. Also a vacuum is literally negative pressure. Hence why you can measure a vacuum in negative psi as well. Which is a measure meant of pressure lol. Hell all of these measurements are measuring pressure either positive or negative.
Oh and when it comes to most hvac you use inWC or inches of water column. It’s used to measure static duct pressure, the draft from an inducer (like in the video), and also gas pressure.
Thank you
Very good
Thank you for sharing this information
🫡🫡🫡🫡🫡🫡🫡🫡
Why did you need a manometer for this...
That’s literally step one when you find a pressure switch fault. What are talking about lmao?
Vacuum Pressure - its an oxymoron ;)
Does that mean i'm a moron 😄 🤣
@@TaddyDigest I sure hope not. You are my go to guy for real world hvac things.
😆 I got you 😉 brother
That sucks
Vacuum pressure?
It’s one or the other…
I don't know what you mean by the comment
What is a vacuum? It’s negative pressure.
You can also check to see if the heat exchanger has any holes or cracks,just turn the blower on.
Put on positive side of course and if you see the meter reading move then you need to do a visual.
That is a great idea
You my friend have experience
@@TaddyDigest 37 years taught by a old timer years ago,I believe we are all here to help each other. Who we going to call tech support 😂
This is Tech support, I heard that.
Brilliant!!!!!!! Please share more.
This is elementary stuff
And what unit of measure you setting manometer to?
I did not cover that in the video I will do that in the next video
Thanx @Taddy Digest . Keep on bringing us cool informative vids sir!
You're welcome my friend I definitely want to help
It is inches of water column.