problem with split a/c

[Bones]

Can u tell me what the proceedure is for emptying all the gas into the bottle?

do you have a fridge mate who would have a recovery unit? if he does, use this to suck the gas out of the system and into a recovery bottle. (perhaps he might do it for you if offer to quelch his thirst with beers hehe)

otherwise chill your recovery bottle, put it in a bucket with some ice or depending on the size put it in (there) your freezer for a little bit, as refrigerant will migrate to the coldest spot... thus hooking your guages to outdoor unit, purging to chilled recovery bottle will suck alot of gas out by itself.

also make sure you use a clean bottle and vaccuate it before recovering.

i take it your possibly not from nsw, otherwise have a fridge mate buying the 22 for you? if you are, dont get caught big $$$ fines.

[frank]

Daikin did not make any split units on R22 with inverter drives except for the vrv stuff. If you do not know how to reclaim refrigerant - what are you doing working on the equipment??

I don't want to sound condesending but it is a skilled job and should be left to the experts - not only as we have trained for a number of years but it can lead to severe accidents. enough said.

If you wish to post the model number of the outdoor unit I will gladly post the correct charge weight. There is no short cut to knowing how much refrigerant is in the system. You must reclaim the charge and weigh it (specialist equipment required). You must then ensure that the system is leak free and recharge to the manufacturers stated charge. If the system does not then perform as it should do, you have to start looking for the cause of the problem. Just by charging the correct amount of gas does not mean that it will work correctly.

GET PROFFESIONAL ADVICE.

[baker]

Daikin did not make any split units on R22 with inverter drives except for the vrv stuff. If you do not know how to reclaim refrigerant - what are you doing working on the equipment??

GET PROFFESIONAL ADVICE.

This is the problem with a worldwide forum. What applies to one country doesn't to another. In Australia, Daikin inverter splits are predominately R22, although R410A units are now becoming available. These are standard domestic splits. I have 2 in my house.

[iceman007]

Paul,
I have to agree with Frank. If you aren't totally 100% cetain leave it to a trained engineer (I don't want to sound condescending either, but it's so easy to make the problem a whole lot worse). We work almost exclusively on VRV systems and Hitachi VRF's. The Daikin VRV 2 is the 410A Inverter driven system.
The thing to do would be to reclaim the refrigerant into an appropriate vessel(you can't release the gas into the air) (liquid first if possible), and then get the remaining vapour out. Leak test using OFN- if you can leave it in overnight, and then once the leak is repaired, or the whole system is 100% pressure tight, pull a vacuum (to around 200 microns), and leave the system for a little while, making sure the vacuum holds (if the presure rises then stops, it's usually moisture in the system boiling off- so pull the vacuum down again until it holds). As the other guys have already said, check the manufacturers charge weight, and then WEIGH IN the correct charge. This way you can get the correct charge in. If you put in too much, then you can damage the compressor, as it will start to take in liquid slugs. The pressures will be high, and you still will not get the desired cooling, so it is essential that the corrct charge is weighed in. Hope this helps.

Regards

James

[slothslag]

thank you all for help. much appreciated.

especially iceman007 - thanks for your info

[slothslag]

hi guys,

if i fit gauges to the high pressure and low pressure sides. can i tell from that if it has correct charge, or at least near the correct charge or that im not going to ruin the compressor if ive put in too much? if so what values of pressure am i looking for and when?


Paul

[Peter_1]

hi guys,

if i fit gauges to the high pressure and low pressure sides. can i tell from that if it has correct charge, or at least near the correct charge or that im not going to ruin the compressor if ive put in too much? if so what values of pressure am i looking for and when?


Paul

Sure, you can. You must charge till you see HP is going up.
Almost same procedure as emptying the system as you asked in a previous post.
You must connect your gauges and your gas cilinder. You charge your system until you see the HP rising until you have a difference of +/- 50 K with ambient temperature.
You measure aslo the AMP's of the compressor and as soon you reach max AMP stated on the compressor, then it's correct filled.
If needed, adjust safety tripper on the current safety switch.
Don't bother if suction is becoming wet or iced. That's normal.
Suction pressure should be +/- the same as the suction pressure which corresponds to the temperature of the room (for 40°F, you need a suction pressure of 120 psig with R22.
Let me know if it worked.