LChaminés
04-09-2013, 07:13 PM
Hi, I'm from Portugal and we started working with mini-splits recently and things are going smoothly but it appeared a difficult situation of sorts..
The case is, we were called to see an mini-plit system witha possible leak (Panasonic) that someone else installed, as we got there we found the leak (bad flare making a corner almost inside the wall..).
So, after we fixed the leak we had to top up teh R410a (it made no cooling air and the client said it had ice on one of the pipes before, I'm guessing it was the hi-pressure side).
So instead of reclaiming all gas, making vacuum and top up with weight (the good way), we didn't do that since we haven't yet buyed a reclaiming gas machine (name is wrong I know), so, we trapped the gas inside the exterior unit, vacuum it and after that we added gas by pressure, The technical assistance said that the normal operating pressures are under 6.5Bar and 11.4Bar on the service valve, so we toped it to 8.5Bar, since it was making cool air again we left it like that.
Finally.. So my question is, does anyone knows of a chart/table that indicates recomended pressures for mini-splits r410a so we could use this method to top up without weight, or is this so wrong that no one should try this and therefore there's no pressure table for adding gas ina mini-split.
The case is, we were called to see an mini-plit system witha possible leak (Panasonic) that someone else installed, as we got there we found the leak (bad flare making a corner almost inside the wall..).
So, after we fixed the leak we had to top up teh R410a (it made no cooling air and the client said it had ice on one of the pipes before, I'm guessing it was the hi-pressure side).
So instead of reclaiming all gas, making vacuum and top up with weight (the good way), we didn't do that since we haven't yet buyed a reclaiming gas machine (name is wrong I know), so, we trapped the gas inside the exterior unit, vacuum it and after that we added gas by pressure, The technical assistance said that the normal operating pressures are under 6.5Bar and 11.4Bar on the service valve, so we toped it to 8.5Bar, since it was making cool air again we left it like that.
Finally.. So my question is, does anyone knows of a chart/table that indicates recomended pressures for mini-splits r410a so we could use this method to top up without weight, or is this so wrong that no one should try this and therefore there's no pressure table for adding gas ina mini-split.