MrM1
I'm Here, But I'm Not All There
on the EG4 install video from Signature Solar, they said pressure tested it to 500 psi with the nitrogen.
Help me Install 3 EG4 Mini Split Solar Heat Pumps
- Thread starter MrM1
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Plum Crazy Rob
Solar Enthusiast
Hey you've been busy - that all looks great.
So as I understand it, both Scott and yourself envision these units for "maximum flexibility" of running off solar inverter (panels/battery), grid, or direct dedicated solar??
So as I understand it, both Scott and yourself envision these units for "maximum flexibility" of running off solar inverter (panels/battery), grid, or direct dedicated solar??
MrM1
I'm Here, But I'm Not All There
Correct.
I will run the two 24k units solar only. They'll be grid connected with a bypass to the inverter as well. But my inverter is a mere 4000w ... And it has other priorities. But could b there if I need heat or cool in a grid down situation.
The 12k WILL also run solar thru the the day, have a grid connection, but will be on the inverter full time. It will be in my bed room.
Quite an achievement to do it all yourself!
How much do they draw from solar or grid if you run 24k unit off solar (in amps please).
Thanks
MrM1
I'm Here, But I'm Not All There
Well it's held vacuum pressure for 12 hours now at - 27 +/-
So I'm guessing a nitrogen leak test is not necessary?
My only concern, I've seen some videos (not many) and read a few random comments how nitrogen is needed to remove extra moisture for 410a? ?
So I'm guessing a nitrogen leak test is not necessary?
My only concern, I've seen some videos (not many) and read a few random comments how nitrogen is needed to remove extra moisture for 410a? ?
MrM1
I'm Here, But I'm Not All There
Don't know yet. Will take me a week or two more to connect AC power and several more weeks b4 I can install the solar panels.
Busy week at work this week.
But I'll keep you posted.
Quattrohead
Solar Wizard
Nitrogen is flowed during brazing to stop oxidization of the copper, which turns into black flakes that can block orifices.
It can also be used as a cheap non toxic and dry throw away pressure testing gas, but not necessary if you vacuum the lines good.
Plum Crazy Rob
Solar Enthusiast
I think this. I read HVAC guys said nitrogen pressure will find leaks that vac test will not.
I know other guys mentioned they mostly had prior automotive AC experience as do I. I have NEVER heard of anyone doing a nitrogen pressure test on Auto AC, only vac test FWIW...
SolarScott
Solar Enthusiast
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My 24K is running off my main battery/panel system. I have the panels to run it direct now, just need to get them hooked up. I also wired in a transfer switch that I had laying around so I can run off grid if needed. So far, I have had the capacity to just run off my main solar system. Get that house down to 65-66 degrees during the day when I'm working and then turn it off or down as the sun hides behind the horizon. If I try to run my well pump and sprinkler booster, water heaters, clothes dryer, etc and the wife decides to cook, something will have to give.....that is where I hope the direct panels will come into play.
Plum Crazy Rob
Solar Enthusiast
You've been working ? out. That is a heavy MF'er on the 24k. How the hell did you get it up THERE. I see a pallet - loader bucket with forks?
I feel your pain...
Plum Crazy Rob
Solar Enthusiast
Yes. It was 95 Freaking degrees here in KS yesterday. It takes awhile still for the house temp to creep up at night from 65. Then you tickle it at 2AM or whatever with a couple Kwh not a big deal, no external heat load then.
timselectric
If I can do it, you can do it.
- Joined
- Feb 5, 2022
- Messages
- 19,095
The vacuum pulled everything out. Including any moisture.
You are good to go.
MrM1
I'm Here, But I'm Not All There
2 old men and 1 strappin' lad ?You've been working ? out. That is a heavy MF'er on the 24k. How the hell did you get it up THERE. I see a pallet - loader bucket with forks?
I feel your pain...
Brett V
Mad Scientist
It was nice of those two old men to help you out!
400bird
Solar Wizard
I've got the same experience. I spent 10 years and worked up to master tech before getting out of that crap industry.
I had heard it recommended to do nitrogen pressure tests, but never done it. I thing automotive AC, which mostly seals with o-rings in grooves, has to seal better due to vibrations. I've never seen a flare fitting on automotive AC.
I can't say the nitrogen test is needed, in my opinion, it's just how tolerant you are for the chance of a leak/confident in your flares.
MrM1
I'm Here, But I'm Not All There
But ...
Look what I found !
?
So far so good
.
Look what I found !
?
So far so good
.
Plum Crazy Rob
Solar Enthusiast
Good. As the EPA tightens their thumbscrews wasn't hard to google and find reference to Nitrogen pressure test even in cars
Since R410a is already on phase-out makes me kind of wish these were R32 units like Deye is sending to Australia/ Solaracdc.com.au
I guess if it never leaks doesn't matter?
Since R410a is already on phase-out makes me kind of wish these were R32 units like Deye is sending to Australia/ Solaracdc.com.au
I guess if it never leaks doesn't matter?
MrM1
I'm Here, But I'm Not All There
Well one more piece of "insurance"
MrM1
I'm Here, But I'm Not All There
And One Hour Later
No Bubbles ... No Leaks
No Bubbles ... No Leaks
MrM1
I'm Here, But I'm Not All There
Everything nicely PVC UV vinyl wrapped
