Will NAVAC Pumps compete in Commercial HVAC?
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- čas přidán 27. 10. 2022
- Performing a compressor replacement on a York air cooled chiller screw compressor. This compressor failure was caused by a failed liquid level sensor and electrical wiring. I also got to test the NAVAC NRD24M vacuum pump and the NRDC4M recovery machine. NAVAC NMV1 micron gauge is also featured.
Please note that NAVAC recommends using a filter dryer with their recovery machines. Prior to this video I tested and verified this system had no contaminates.
@NAVAC
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Even pure nitrogen will drop in pressure with a temp drop. It just has much less of a drop than atmosphere or refrigerant. The HVAC school app has a calculator built in for figuring this. You can enter the starting temp and pressure, and enter the ending temp and pressure and see if it has actually leaked at all. Awesome video man!
Pure nitrogen will not raise nor drop unless in a perfect vacuum or headed to a star. All the other shit affected the delta...
@@kaptaintrips nitrogen follows the gas laws just like any other.
Things have really changed in this field since I retired. Some of it for the better and some of it for the not so better. Like this demonstration of the new equipment is awesome. Too bad it wasn’t available for me. I really love watching your videos, kind of keeps me updated on some of the new changes. MTT Brother.
You probably know it, after some years in the trade. After vacuum, and equalizing, take your pressure / temperature = number.
After 24 hours, take pressure / temperature = same number, it's tight.
Thanks for making the time to get this video out there!
I do every job with my 8cfm YJ. 3000ton YKs, 200 ton YVAAs, 2 ton Heat Pumps, Recovery Tanks, whatever. I try to use the biggest and shortest hose as possible and as many of them I can fit. Last big job I did was out in the snow, YLAA chiller, put a 3/8 hose on liquid service, 3/8 hose of suction charging valve, 1/4" hose on liquid line after EEV and micron gauge was on discharge pipe. Within an hour, I was at 480 microns (enough time to pack my tools and make one trip to my van and back up with the refrigerant.) The next morning I got to 340 where it stayed for 2 hours decaying. I ALWAYS leave my pump running overnight on anything bigger than 5 tons, unless I achieve sub 500 before lunchtime. All repair job are quoted as minimum two days or 1 and a half days, to get a quality evacuation. With a single 1/2" hose, I can pull a 2500 ton YK chiller from 14.4psia to 1200 microns in a couple hours and it takes the remainder of the night to get below 300 (boiling 15 gallons of refrigerant laden used oil.)
Point is, I like this pump but would NEVER bring it to job sites. This seems like a great fit for a Chiller Plant to be dragged around to each unit... not so much a service van. Looks like it weighs over 100lbs.
Brilliant! pulling a vacuum before pressure testing!
Rectorseal Tru Blu pipe sealant is my go to for threaded connections.
Bloody Nora mate ! With the setup I've got it would've taken me ages to get to 3000 microns, let alone 350 !
Holden mate , next time you talk to Navac could you please ask them why they're not available over in the EU ?
And I don't wanna hear them say : oh but we are ! Nah man , they aren't, trust me I've looked for their products and nobody has heard of them over here 😒.
Great Job tech
Sweet, man. Thanks.
Just a note, the hotter the oil in the pump the faster moisture will evaporate out of the oil. Is advantageous.
Just dont burn or boil said oil.
Very nice Work
I have an Accutools Pro....the app that you can use is fantastic and has plenty of recordable data. Pull down, decay test, graphs. I do like Navac products and they produce for a lot of manufacturers that just re-brand them. This was a cool video of some awesome products.
Hahahaha the little quips were hilarious....they were blown...them right there...they blew because there blown.... 🤣
Just did an overhaul on cvhf with oversized barrels. 900# circuit. Same vacuum pump had it to 990 microns in 5-6 hrs and down to 170 when I came in the next morning.
Used my first navac master series 4cyl recov machine. Thing is a beast. Not using push pull to charge 800lbs of r134 it had 300lbs in the chiller in around 3.5 hours. Next will be the vacuum pump
I did have it throttled down about halfway though because I was borrowing it to try it out. I’ll be excited to see the push pull on the other circuit with this same machine
Loved the video
Could you possibly do a rigging video?Im new to the industrial side of hvac and found that my rigging skills are sub par😂
Interesting, you’ve had success with Nylog on those threaded fittings without leakage? I don’t know why I feel squirrelly about using it in those applications. My general go to is either Loctite 567 or 554.
My coworker calls them pecker heads too lol, i looked at him and said "what was that called again?" 😂
Also i love that small baby york runnin next to these giants lol
Idk, my guys use the yellowJacket bullets and they’re impressive-
I was surprised
Your the goat, grouse vid
Please what capacity of vacuum pump ,thanks
Oil in the refrigerant
Always open the economizer solenoid before putting on hg pump
I have only used a Welsh. What is your opinion on the two?
I love my appi for installing liquid
I’m a refrigeration tech here in Philadelphia I work on anhydrous ammonia and big ice machines I would like to know how they pump is working out for you I’m thinking about buying one your videos are really good because the real world videos in real service I really like you a lot. Let me know if you get this comment and let me know if this pump is working out for you. I’m thinking about buying one. Thank you great video video
The pump has been completely fantastic. I've been such a big fan of the Apion G5 twin for such a long time but this one has become my new favorite. You can move refrigerant really well like the g5 twin but it's built-in subcooler is amazing and then the ability to bypass the subcooler to increase flow has been great. The other techs are constantly trying to borrow it. Anyway it's easy to say for somebody that had a given to him but I have truly loved this pump.
Hello bro
I have a problem york chiller ( Low Dischage Superheat ) can you help me out
There's a loctite you mentioned it there was a yellow one that's reefer safe
Loctite 554 is refrigerant rated.
Hey hvac time, do you flow condenser water and chilled water on a water cooled chiller when entering nitrogen and during evacuation?
No, I stop flow entirely for that process.
Here we use Trace-a-gas which is 95% nitrogen and 5% hydrogen, then you can use a hydrogen electronic leak detector to find leaks .
Its good for looking for leaks but not so much for pressure testing because it's even more reactive to temperature changes .
Nitrogen pressure will definitely rise and fall with temp swings. Like mentioned above, There are apps for It, Even websites that will calculate It for you. Good one to show apprentices Is the below formula.
Nitrogen test
P2 = (P1xT2)/T1
P1 - Test pressure
P2 - Verified pressure
T1 - Ambient test pressure temp
T2 - Ambient verified pressure test
Need to convert F* to Kelvin
K= (*F - 32 / 1.800 ) + 273.15
Example:
Test pressure 190# @ 94* (307.6 K)
Verified pressure temp 70* (294.3 K)
(190 x 294.3) / 307.6 = 181.78 PSI
Or start pressure / temp (measure on pipe) = a number. After pressure test. new pressure / new temperature = same number, it's tight.
Did you force the EEV open during evacuation?
Yes both were open 100%
@@HVACTIME awesome video man!
Isn’t nylog just a thread lubricant and not a sealant?
Yes that is correct.
Always megg the compressor at 1000 megg ohms out of the box before install.
9:01 - You gotta be kidding me! Not a fair comparison! Everything works better with TruBlu hoses! Just sayin'.
Had a tech recently push too much N into a circut to leak check
It pushed through the other circuit through the barrel. What a shit design. He claimed he only blew it up to 80#.
This can definitely happen.
Svp traduire en français
You must have run out of room -
Because it’s spelled “available” 🫡
Thanks for sharing!