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Airco split unit
#1
Heye Gents & Galls.
I have a split airco (inside and outside unit).
I disconnected it in end 2012!
Put them in the wood storage shed, and left it over there.
Know i don't know anything about this technology.

But i think, i just going to connect it, connect a vacuum pump to it, to get all the air out.
Fill it up with the right type of gas(maybe some oil?)
And it will work again??
Somehow i don't think so.

What are your thoughts or idea or experience on this type of airco.
Its a double compressor airco? two gasses or for extra pressure?


The valve i am worried about, maybe they are dried out, inside?


When i cut the pipes, after the gas was relieved, i closed them by cutting extra


The same with the inside unit.


Thanks in advance
Selling everything at marketplace.
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#2
First check the type of refrigerant it needs, if it is r22 then it is for recycling... 
Any later refrigerant ( r410, r134a, .. ) you must contact a certified installer to connect pipes, test for leaks and charge with refrigerant.


If the pipes where closed to the air, the van chould be ok.

There is only  one compressor (as far a i can see on the picture), the other black thing on the side of it is a liquid seperator (overheater).
It is possible there are 2 or more compressors in a unit like this, but then there would be more connections for indoor units, and there is only one on yours, so...
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#3
Wim thank you for your reply,
The refrigerant it wants, i found on a tag: 
       high pressure r-410a refrigerant
            ???? operating pressure.
                r-410a refrigerant 
              vg74 compressor oil.

I am not sure that the pipes where 100% closed, it gets hot in the shed 50c so gas/air expands, and you had that winter also - 25c.
So, i don't know, but i can tell for sure that there is no more pressure at this time and there is still some clear oil in the system.

With the first picture shows, that is all there is, so one compressor and the other is a liquid separator.
I only have one indoor unit.

I probably can get a bottle of the r-410a gas, or sealed tubes.
I can test myself if the system is air closed, i only need a number in psi or bar (my strongest compressor can reach max 24 bar)
I think: 1 to 4 bars somewhere? for 48 hours? would be enough with NO drop, for test?

After testing and installing myself i will call a certified installer, just to avoid environmental issues and possible health issues.

How do I proceed? can i test the airco in a way before there is gas in it? of course i don't expect cold air out of it without gas.
I would like to make a test setup in the shed before i place that thing on the roof and drill some holes for the inside unit.
And how can i test if the valves are still in good order?

Thanks again and in advance for your answers, best.
Selling everything at marketplace.
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#4
r410 is good for a few years ... (untill 2022 if i am not mistaken)
Don't do anything with the oil, if the unit has not leaked some, it should be fine.

You may install the piping, and kabels yourself... but the connections, preparing and filling of the unit can only be done by a certified installer.
you can not own or handle refrigirant legal yourself.

That been sayd, i can explain how to prepare en fill your unit....

First re-connect the pipes, use only hard solder (not tin or so, only brass or silver rods) do not try to remake the fittings that are on the vans, the flares on them are made with special tools. when connected, use nitrogen (nothing else) to set the unit under pressure, and test for leaks with some soapy liquid (check for bubbles) do not use air from a compressor.
The max pressure chould be noted on the specs ( 10-15 Bar is suffient )
Then evacuate the air and nitrogen (and any left over refrigerant) out of the unit by use of a vacuumpump (bit tricky to find one) ,leave the pump pumping for several houres (to get moisture out the system).
Once vacuum, close all vans and leave it, if the vacuum is still present after a few hours, the system is leakfree and can be filled with refrigerant.


For this you need nothing special, only a scale (10gr precision)... on the unit schould be marked how much refrigerant is in the system, you have to add some to compensate for the lengt of the piping ( this info you can find in the manual or online, something like 10gr/mtr).
Take the wieght of the bottle r410 (or reset the scale to zero with the bottle on it) and connect the bottle to the liquid side of the unit (small tube), then open the van of the bottle and the van of the unit and let the vacuum in the system suck the refrigirant in the system until the marked weight (+ added weight tubing) is out of the bottle.

if the refrigerant is not flowing anymore before the needed weight is reached, you can always finish the charge when the unit is running by the suction side of the unit (bigger line).

Never, in the fill-up fase, after you have put a vacuum on the system, there can be air allowed back in to the unit, ( you will see, that is the difficult part..) or you have to restart with a new vacuum. 

After all that, you can start up the unit and enjoy the cold (or heat in your case, it is a reversible unit)  Wink

When you are done reading this, you probably aggree it is best to find a licenced installer, he will do this with his eyes closed.  Sleepy

Good luck,
100kwh-hunter likes this post
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10KW 3phase hybrid inverter. 40Kwh 18650 storage (for now)
My setup: https://secondlifestorage.com/t-Instant-powerwall
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#5
Heat????, i will read this one again tomorrow.
O yes, a remote, can remember where i left that thing.
Selling everything at marketplace.
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#6
Despite the fact it can be done by myself, i will get myself a installer.

I have the solder and a vacuum pump.(from the melting oven)
Now i have to get the proper connections, the nitrogen ect.
This adventure will take to much time/cost and fiddling around with some expensive equipment.

I will call a company

Remote is found.

Thanks
Selling everything at marketplace.
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#7
Hi Hunter

I'm not sure about in the Netherlands but in the UK only holders of an Fgas certificate can work on the refrigerant side.

Over here its a massive no no to let any refrigerant escape to atmosphere. A 1 kg release of R-410A is equivalent
to GWP ( global warming potential) 2088 kg of CO2, a 1 kg release of R-404A is equivalent to 3922 kg of CO2.

In January 2020 there will be a ban on using virgin HFCs to service refrigeration equipment that uses a refrigerant with a GWP above 2500. I believe “medium-high” GWP HFCs like R-134a and R-410A are also on a planed phase out over the next few years.
UK Southwest.

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#8
(08-04-2019, 07:13 PM)chuckp Wrote: Over here its a massive no no to let any refrigerant escape to atmosphere.

In the US, that's something like a $37,500 fine (if I recall correctly) and there is a bounty reward if you rat your neighbors out.
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#9
@ mike...
H.... S....
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#10
(08-08-2019, 05:45 PM)100kwh-hunter Wrote: @ mike...
H.... S....

What is HS? Horse Sh.t?
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